CN113300335A - Double-bus differential protection combined-tripping steam turbine set loop - Google Patents
Double-bus differential protection combined-tripping steam turbine set loop Download PDFInfo
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- CN113300335A CN113300335A CN202110688289.0A CN202110688289A CN113300335A CN 113300335 A CN113300335 A CN 113300335A CN 202110688289 A CN202110688289 A CN 202110688289A CN 113300335 A CN113300335 A CN 113300335A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/006—Arrangements of brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/14—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to other specific conditions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
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Abstract
本发明公开了一种双母线差动保护联跳汽轮机组的回路，A套母差保护包括A套母差动作1动合触点及A套母差动作2动合触点；B套母差保护包括B套母差动作1动合触点及B套母差动作2动合触点；A套发变组保护包括A套母差动作2非电量开入、A套发变组保护2跳闸矩阵及A套发变组保护2跳断路器出口；B套发变组保护4包括B套母差动作2非电量开入、B套母差动作2跳闸矩阵及B套发变组保护2跳断路器出口；该回路能够保证机组安全停机。
The invention discloses a circuit of a double busbar differential protection combined tripping steam turbine set. A set of bus differential protection includes A set of bus differential action 1 dynamic closing contact and A set of bus differential action 2 dynamic closing contacts; B set of bus differential action The protection includes B sets of bus differential action 1 moving contact and B set bus differential action 2 dynamic contacts; A set of generator-transformer group protection includes A set of bus differential action 2 non-electricity switch input, A set of generator-transformer group protection 2 tripping Matrix and A set of generator-transformer group protection 2 trip circuit breaker outlet; B set of generator-transformer group protection 4 includes B-set bus differential action 2 non-electricity switch-in, B set of bus differential action 2 trip matrix and B set of generator-transformer group protection 2 trips Circuit breaker outlet; this circuit can ensure safe shutdown of the unit.
Description
Technical Field
The invention belongs to the technical field of electricity, and relates to a loop of a double-bus differential protection combined-tripping steam turbine set.
Background
In a power plant, each generator set and a line are collected on a bus, and electric energy generated by each generator set is transmitted to a power grid through the line. When the bus runs normally and has an external fault, the current flowing into the bus is equal to the current flowing out of the bus; when a fault occurs on the bus, the unit currents connected with the bus flow into the bus, and the sum of the currents is equal to the short-circuit current of the short-circuit point. The bus differential protection base can distinguish short circuit inside and outside the bus according to the principle, and the protection range is the protection range of the current transformer connected with each branch circuit of the bus and participating in differential current calculation. When the bus differential protection acts, all branches on the bus are cut off rapidly, including generator-transformer sets, lines, bus couplings and the like.
At present, two main modes are available for forming a loop of a bus differential protection outlet combined-tripping steam turbine generator unit. The method comprises the following steps that after bus differential protection action, a main transformer tripping high-voltage side circuit breaker signal is sent to a circuit breaker operation box or a circuit breaker tripping driving loop, and a generator set is disconnected; and after the female differential protection acts, a signal of tripping the main transformer high-voltage side circuit breaker is sent to the generator-transformer unit protection device, and the generator-transformer unit protection device is switched in by setting the non-electric quantity, so that the generator set is safely shut down.
The prior art at present has the following defects:
the first and second methods have great disadvantages. In the first mode, when the bus differential protection acts, a steam turbine unit grid-connected circuit breaker is directly and instantly tripped, the unit is disconnected under load, the serious hidden danger of overspeed exists, and the unit safety is threatened (attached figure 1); in the second mode, safe shutdown can be realized by setting the non-electric quantity of the generator-transformer group protection device to be switched in, but the generator-transformer group circuit breaker is not directly switched in a circuit breaker driving circuit after busbar differential protection action, and the generator-transformer group circuit breaker fails to operate after an intermediate link fails, so that a fault point cannot be timely isolated, and thus an accident is expanded (shown in figure 2).
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a circuit of a double-bus differential protection combined-tripping steam turbine unit, which can ensure the safe shutdown of the unit.
In order to achieve the purpose, the loop of the double-bus differential protection combined tripping steam turbine set comprises A sets of bus differential protection, B sets of bus differential protection, A sets of generator-transformer protection, B sets of generator-transformer protection, an operation box and a circuit breaker; the A set of bus differential protection comprises an A set of bus differential action 1 dynamic contact and an A set of bus differential action 2 dynamic contact; the B set of bus differential protection comprises a B set of bus differential action 1 dynamic contact and a B set of bus differential action 2 dynamic contact; the set A of generator-transformer group protection comprises a set A of mother-difference action 2 non-electric quantity switch-in, a set A of generator-transformer group protection 2 trip matrix and a set A of generator-transformer group protection 2 trip circuit breaker outlet; the B sets of generator-transformer group protection 4 comprise a B set of mother-difference action 2 non-electric quantity switch-in, a B set of mother-difference action 2 trip matrix and a B set of generator-transformer group protection 2 trip breaker outlet; the operation box comprises a first group of positive control power supplies + KM1, a first group of negative control power supplies-KM 1, a first group of non-startup failure non-coincidence coil 1TJF and coil 1TJF movable contacts, a first group of startup failure non-coincidence coil 1TJR and coil 1TJR movable contacts, a second group of positive control power supplies + KM2, a second group of negative control power supplies-KM 2, a second group of non-startup failure non-coincidence coil 2TJF and coil 2TJF movable contacts, and a second group of startup failure non-coincidence coil 2TJR and coil 2TJR movable contacts; the circuit breaker comprises a first group of power positive power supplies + KM11, a first group of power negative power supplies-KM 11, a first group of trip coils TQ1, a second group of power positive power supplies + KM, a second group of power negative power supplies-KM and a second group of trip coils TQ 2;
one end of the A set of mother-difference action 1 movable contact is connected with a first group of positive control power supply + KM1, the other end of the A set of mother-difference action 1 movable contact is connected with one end of a first group of no-start failure non-coincident coils 1TJF, and the other end of the first group of no-start failure non-coincident coils 1TJF is connected with a first group of negative control power supply-KM 1;
one end of the coil 1TJF movable contact 7 is connected with one ends of a first group of power positive power supplies + KM11 and a coil 1TJR movable contact, the other end of the coil 1TJF movable contact is connected with one end of a first group of tripping coils TQ1 and the other end of a coil 1TJR movable contact, and the other end of the first group of tripping coils TQ1 is connected with a first group of power negative power supplies-KM 11;
the A set of female differential motion 2 dynamic close contact is connected with the A set of female differential motion 2 non-electric quantity open-close;
the A set of mother-to-mother difference action 2 is started to be connected with the control end of the outlet of the A set of generation and transformation group protection 2 trip matrix through the A set of generation and transformation group protection 2 trip matrix;
one end of a movable contact in an outlet of the A set of the generator-transformer group protection 2-hop circuit breaker is connected with a first group of positive control power supply + KM1, the other end of the movable contact in the outlet of the A set of the generator-transformer group protection 2-hop circuit breaker is connected with one end of a first group of startup failure non-coincident coils 1TJR, and the other end of the first group of startup failure non-coincident coils 1TJR is connected with a first group of negative control power supply-KM 1;
one end of the set B of mother-difference action 1 movable contact points is connected with a second group of positive control power supply + KM2, the other end of the set B of mother-difference action 1 movable contact points is connected with one end of a second group of non-starting failure non-coincident coils 2TJF, and the other end of the second group of non-starting failure non-coincident coils 2TJF is connected with a second group of negative control power supply-KM 2;
one end of the coil 2TJF movable contact is connected with one end of a second group of power positive power supply + KM22 and one end of a coil 2TJR movable contact, the other end of the coil 2TJF movable contact and the other end of the coil 2TJR movable contact are connected with one end of a second group of trip coils TQ2, and the other end of the second group of trip coils TQ2 is connected with a second group of power negative power supply-KM 22;
the set B of female differential motion 2 dynamic close contacts are connected with the two ends of the set B of female differential motion 2 which are not opened by electric quantity;
the B set of mother difference action 2 non-electric quantity is switched in and is connected with the control end of the outlet of the B set of generator-transformer protection 2-jump circuit breaker through the B set of mother difference action 2 trip matrix;
one end of a movable contact in an outlet of the B set of the generator-transformer group protection 2-hop circuit breaker is connected with a second group of positive control power supply + KM2, the other end of the movable contact in the outlet of the B set of the generator-transformer group protection 2-hop circuit breaker is connected with one end of a second group of startup failure non-coincident coils 2TJR, and the other end of the second group of startup failure non-coincident coils 2TJR is connected with a second group of negative control power supply-KM 2.
And the B set of mother differential action 2 trip matrix is connected with the B set of mother differential action 2 closing main valve outlet and the second demagnetization and starting quick cut-out.
The A set of transmission and transformation group protection 2 tripping matrix is connected with the A set of transmission and transformation group protection 2 closing main valve outlet and the first demagnetization and starting fast switching-out opening.
The invention has the following beneficial effects:
when the loop of the double-bus differential protection combined-tripping steam turbine set is specifically operated, two pairs of bus differential protection action movable contacts are respectively provided by utilizing A sets of bus differential protection and B sets of bus differential protection, the first pair of bus differential protection action movable contacts of the A sets of bus differential protection and B sets of bus differential protection are respectively and directly connected into a first set of tripping coil TQ1 and a second set of tripping coil TQ2, the circuit breaker is directly driven to trip, unnecessary intermediate links are reduced, and the circuit breaker reliably trips when the bus differential protection acts; meanwhile, the second pair of bus differential protection action dynamic contact points of the A set of bus differential protection and the B set of bus differential protection are respectively connected with two non-electric quantities of the A set of generator-transformer set protection and the B set of generator-transformer set protection to be started, so that the turbine set is prevented from overspeed, and the safe shutdown is realized. The invention fully utilizes the original equipment, has exquisite conception and simple design, improves the safety and reliability of the bus differential protection combined-hop steam turbine set, and can be widely popularized and applied.
Drawings
FIG. 1 is a schematic circuit diagram of a first dual-bus differential protection combined-trip steam turbine set of the prior art;
FIG. 2 is a schematic circuit diagram of a second dual-bus differential protection combined-trip steam turbine set of the prior art;
fig. 3 is a schematic structural diagram of the present invention.
1 is a set of busbar differential protection A, 2 is a set of busbar differential protection B, 3 is a set of hair-to-group protection A, 4 is a set of hair-to-group protection B, 5 is an operation box, 6 is a circuit breaker, 7 is a set of busbar differential action 1 movable contact, 8 is a set of busbar differential action 2 movable contact, 9 is a set of busbar differential action 2 non-electricity-quantity switch-in, 10 is a set of hair-to-group protection 2 trip matrix A, 11 is a set of hair-to-group protection 2 switch main steam gate outlet, 12 is a set of hair-to-group protection 2 trip breaker outlet, 13 is a first de-excitation and start quick-switch outlet, 14 is a first set of control positive power supply + KM1, 15 is a first set of control negative power supply-KM 1, 16 is a first set of non-start failure non-coincident coil 1TJF, 17 is coil 1TJF movable contact, 18 is a first set of start failure coil 1TJR, 19 is coil 1TJR movable contact, 20 is a first set of power supply + KM 57, and 11 is a first set of non-failure non-coincident coil 1 TKM movable contact, 22 is a first set of trip coils TQ1, 23 is a set of B mother-difference action 1 moving contacts, 24 is a set of B mother-difference action 2 moving contacts, 25 is a set of B mother-difference action 2 non-electricity-quantity input, 26 is a set of B mother-difference action 2 trip matrix, 27 is a set of B mother-difference action 2 switch main valve outlet, 28 is a set of B generator-transformer protection 2 trip breaker outlet, 29 is a second de-excitation and start-up fast-switching outlet, 30 is a second set of control positive power supply + KM2, 31 is a second set of control negative power supply-KM 2, 32 is a second set of no-start no-failure non-failure coils 2TJF, 33 is a set of coils 2TJF moving contacts, 34 is a second set of start-failure coils 2TJR, 35 is a set of non-failure coils 2TJR moving contacts, 36 is a second set of power positive power supply + KM22, 37 is a second set of negative power supply- KM 22, and 38 is a second set of trip coils TQ 2.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 3, the loop of the double-bus differential protection combined-trip steam turbine unit comprises a set of bus differential protection 1, a set of bus differential protection 2, a set of generator-transformer protection 3, a set of generator-transformer protection 4, an operation box 5 and a circuit breaker 6;
the A set of bus differential protection 1 comprises an A set of bus differential action 1 dynamic contact 7 and an A set of bus differential action 2 dynamic contact 8;
the B set of bus differential protection 2 comprises a B set of bus differential action 1 dynamic contact 23 and a B set of bus differential action 2 dynamic contact 24;
the set A of generator-transformer group protection 3 comprises a set A of mother-difference action 2 non-electric quantity switch-in 9, a set A of generator-transformer group protection 2 trip matrix 10, a set A of generator-transformer group protection 2 switch-off main throttle outlet 11, a set A of generator-transformer group protection 2 trip circuit breaker outlet 12 and a first demagnetization and starting fast switch-out 13;
the B set of generator-transformer group protection 4 comprises a B set of mother-difference action 2 non-electric quantity switch-in 25, a B set of mother-difference action 2 trip matrix 26, a 2B set of mother-difference action 2 switch-off main throttle outlet 27, a B set of generator-transformer group protection 2 trip breaker outlet 28 and a second demagnetization and start fast switch-out 29;
the operation box 5 comprises a first group of positive control power supplies + KM114, a first group of negative control power supplies-KM 115, a first group of no-start failure non-coincidence coils 1TJF16 and 1TJF movable contacts 17, a first group of no-start failure non-coincidence coils 1TJR18 and 1TJR movable contacts 19, a second group of positive control power supplies + KM230, a second group of negative control power supplies-KM 231, a second group of no-start failure non-coincidence coils 2TJF32 and 2TJF movable contacts 33, a second group of no-start failure non-coincidence coils 2TJR34 and 2TJR movable contacts 35;
the circuit breaker 6 comprises a first group of power positive power supplies + KM1120, a first group of power negative power supplies-KM 1121, a first group of trip coils TQ122, a second group of power positive power supplies + KM2236, a second group of power negative power supplies-KM 2237 and a second group of trip coils TQ 238;
one end of a set of mother-difference action 1 movable contact 7 is connected with a first set of positive control power supply + KM114, the other end of the set of mother-difference action 1 movable contact 7 is connected with one end of a first set of no-start failure non-coincident coils 1TJF16, and the other end of the first set of no-start failure non-coincident coils 1TJF16 is connected with a first set of negative control power supply-KM 115;
one end of the coil 1TJF movable contact 17 is connected to one end of the first group of positive power supplies + KM1120 and one end of the coil 1TJR movable contact 19, the other end of the coil 1TJF movable contact 17 is connected to one end of the first group of trip coils TQ122 and the other end of the coil 1TJR movable contact 19, and the other end of the first group of trip coils TQ122 is connected to the first group of negative power supplies-KM 1121;
the A set of female differential motion 2 is connected with the A set of female differential motion 2 non-electric quantity switch-in 9;
the A set of mother difference action 2 non-electric quantity switching-in 9 is connected with the control end of an outlet 12 of the A set of generator-transformer group protection 2 trip matrix 10 through the A set of generator-transformer group protection 2 trip matrix 10, and the A set of generator-transformer group protection 2 trip matrix 10 is connected with the A set of generator-transformer group protection 2 switch main throttle outlet 11 and a first de-excitation and starting fast switch outlet 13;
one end of a movable contact in the outlet 12 of the set a of the generator-transformer-group protection 2-hop circuit breaker is connected with a first group control positive power supply + KM114, the other end of the movable contact in the outlet 12 of the set a of the generator-transformer-group protection 2-hop circuit breaker is connected with one end of a first group startup failure non-coincident coil 1TJR18, and the other end of the first group startup failure non-coincident coil 1TJR18 is connected with a first group control negative power supply-KM 115;
one end of the set B of mother-difference action 1 movable contact points 23 is connected with the second set of control positive power supply + KM230, the other end of the set B of mother-difference action 1 movable contact points 23 is connected with one end of the second set of non-starting failure non-coincident coils 2TJF32, and the other end of the second set of non-starting failure non-coincident coils 2TJF32 is connected with the second set of control negative power supply-KM 231;
one end of the coil 2TJF movable contact 33 is connected to one end of the second group of positive power supply + KM2236 and the coil 2TJR movable contact 35, the other end of the coil 2TJF movable contact 33 and the other end of the coil 2TJR movable contact 35 are connected to one end of the second group of trip coil TQ238, and the other end of the second group of trip coil TQ238 is connected to the second group of negative power supply-KM 2237;
the B set of female differential motion 2 movable contact 24 is connected with two ends of a B set of female differential motion 2 non-electric quantity switch-in 25;
the B set of mother differential action 2 non-electric quantity switch-in 25 is connected with the control end of the B set of generator-transformer group protection 2-trip circuit breaker outlet 28 through the B set of mother differential action 2 trip matrix 26, and the B set of mother differential action 2 trip matrix 26 is connected with the B set of mother differential action 2-off main throttle outlet 27 and the second demagnetization and starting quick-cut outlet 29;
one end of a movable contact in the outlet 28 of the set B of the generator-transformer-group protection 2-hop circuit breaker is connected with the second set of positive control power supply + KM230, the other end of the movable contact in the outlet 28 of the set B of the generator-transformer-group protection 2-hop circuit breaker is connected with one end of the second set of startup failure non-coincident coil 2TJR34, and the other end of the second set of startup failure non-coincident coil 2TJR34 is connected with the second set of negative control power supply-KM 231.
According to the invention, the A set of bus differential protection 1 and the B set of bus differential protection 2 are used for respectively providing two pairs of bus differential protection action dynamic-closing contacts, the first pair of bus differential protection action dynamic-closing contacts of the A set of bus differential protection 1 and the B set of bus differential protection 2 are respectively and directly connected to the first set of trip coil TQ122 and the second set of trip coil TQ238, so that the circuit breaker is directly driven to trip, unnecessary intermediate links are reduced, and the circuit breaker reliably trips during bus differential protection action; meanwhile, the second pair of bus differential protection action moving contact points of the A set of bus differential protection 1 and the B set of bus differential protection 2 are respectively connected with two non-electric quantity switches of the A set of generator-transformer set protection and the B set of generator-transformer set protection, and a main valve is closed, the magnetism is removed and quick switching is started while a breaker is tripped by setting a tripping matrix outlet mode, so that the turbine set is prevented from overspeed, and safe shutdown is realized. The invention fully utilizes the original equipment, has exquisite conception and simple design, improves the safety and reliability of the bus differential protection combined-hop steam turbine set, and can be widely popularized and applied.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (3)
1. A loop of a double-bus differential protection combined-tripping steam turbine unit is characterized by comprising a set of bus differential protection (1), a set of bus differential protection (2), a set of generator-transformer protection (3), a set of generator-transformer protection (4), an operation box (5) and a circuit breaker (6); the A set of bus differential protection (1) comprises an A set of bus differential action 1 dynamic contact (7) and an A set of bus differential action 2 dynamic contact (8); the B set of bus differential protection (2) comprises a B set of bus differential action 1 dynamic contact (23) and a B set of bus differential action 2 dynamic contact (24); the set A of generator-transformer group protection (3) comprises a set A of mother-difference action 2 non-electric quantity switch-in (9), a set A of generator-transformer group protection 2 trip matrix (10) and a set A of generator-transformer group protection 2 trip circuit breaker outlet (12); the B set of generation and transformation group protection (4) comprises a B set of mother difference action 2 non-electric quantity switch-in (25), a B set of mother difference action 2 trip matrix (26) and a B set of generation and transformation group protection 2 trip circuit breaker outlet (28); the operation box (5) comprises a first group of positive control power supplies + KM1(14), a first group of negative control power supplies-KM 1(15), a first group of non-starting failure non-coincident coils 1TJF (16) and coil 1TJF movable contacts (17), a first group of starting failure non-coincident coils 1TJR (18) and coil 1TJR movable contacts (19), a second group of positive control power supplies + KM2(30), a second group of negative control power supplies-KM 2(31), a second group of non-starting failure non-coincident coils 2TJF (32) and coil 2TJF movable contacts (33), and a second group of starting failure non-coincident coils 2TJR (34) and coil 2TJR movable contacts (35); the circuit breaker (6) comprises a first group of power positive power supplies + KM11(20), a first group of power negative power supplies-KM 11(21), a first group of trip coils TQ1(22), a second group of power positive power supplies + KM22(36), a second group of power negative power supplies-KM 22(37) and a second group of trip coils TQ2 (38);
one end of the A set of mother-difference action 1 movable contact (7) is connected with a first group of positive control power supply + KM1(14), the other end of the A set of mother-difference action 1 movable contact (7) is connected with one end of a first group of non-starting failure non-coincident coils 1TJF (16), and the other end of the first group of non-starting failure non-coincident coils 1TJF (16) is connected with a first group of negative control power supply-KM 1 (15);
one end of a coil 1TJF movable contact (17) is connected with a first group of power positive power supplies + KM11(20) and one end of a coil 1TJR movable contact (19), the other end of the coil 1TJF movable contact (17) is connected with one end of a first group of tripping coils TQ1(22) and the other end of the coil 1TJR movable contact (19), and the other end of the first group of tripping coils TQ1(22) is connected with a first group of power negative power supplies-KM 11 (21);
a set of female differential motion 2 dynamic close contacts (8) are connected with A set of female differential motion 2 non-electric quantity open contacts (9);
a set of mother difference action 2 non-electric quantity input (9) is connected with a control end of an outlet (12) of the A set of generation and transformation group protection 2 trip matrix (10) through the A set of generation and transformation group protection 2 trip matrix (10);
one end of a movable contact in an outlet (12) of the A set of generator-transformer group protection 2-hop circuit breaker is connected with a first group of positive control power supply + KM1(14), the other end of the movable contact in the outlet (12) of the A set of generator-transformer group protection 2-hop circuit breaker is connected with one end of a first group of startup failure non-coincident coils 1TJR (18), and the other end of the first group of startup failure non-coincident coils 1TJR (18) is connected with a first group of negative control power supply-KM 1 (15);
one end of each set of the B set of the mother-difference action 1 movable contact points (23) is connected with a second set of control positive power supply + KM2(30), the other end of each set of the B set of the mother-difference action 1 movable contact points (23) is connected with one end of a second set of non-starting failure non-coincident coils 2TJF (32), and the other end of each second set of the non-starting failure non-coincident coils 2TJF (32) is connected with a second set of control negative power supply-KM 2 (31);
one end of the coil 2TJF movable contact (33) is connected with one ends of a second group of power positive power supplies + KM22(36) and a coil 2TJR movable contact (35), the other end of the coil 2TJF movable contact (33) and the other end of the coil 2TJR movable contact (35) are connected with one end of a second group of trip coils TQ2(38), and the other end of the second group of trip coils TQ2(38) is connected with a second group of power negative power supplies-KM 22 (37);
the B set of female differential motion 2 dynamic close contacts (24) are connected with two ends of a B set of female differential motion 2 non-electric quantity open-close contact (25);
the B set of mother difference action 2 non-electric quantity input (25) is connected with the control end of the B set of generator-transformer group protection 2-jump circuit breaker outlet (28) through the B set of mother difference action 2 trip matrix (26);
one end of a movable contact in the outlet (28) of the B set of the generator-transformer group protection 2-hop circuit breaker is connected with a second group of positive control power supply + KM2(30), the other end of the movable contact in the outlet (28) of the B set of the generator-transformer group protection 2-hop circuit breaker is connected with one end of a second group of startup failure non-coincident coils 2TJR (34), and the other end of the second group of startup failure non-coincident coils 2TJR (34) is connected with a second group of negative control power supply-KM 2 (31).
2. The circuit of a double-busbar differential protection combined-trip steam turbine unit according to claim 1, wherein the B sets of busbar differential action 2 trip matrixes (26) are connected with the B sets of busbar differential action 2 closing main throttle outlets (27) and the second demagnetization and starting quick-switching outlets (29).
3. The circuit of a double-bus differential protection combined-trip steam turbine unit according to claim 1, characterized in that the trip matrix (10) of the generator-transformer group protection 2 of the set a is connected with the main throttle outlet (11) of the generator-transformer group protection 2 of the set a and the first demagnetization and start quick-switch outlet (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110688289.0A CN113300335A (en) | 2021-06-21 | 2021-06-21 | Double-bus differential protection combined-tripping steam turbine set loop |
Applications Claiming Priority (1)
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130271879A1 (en) * | 2012-04-17 | 2013-10-17 | Siemens Aktiengesellschaft | Fault Protection System For A Power System Of Dynamically Positioned Vessel |
| CN103840553A (en) * | 2014-02-26 | 2014-06-04 | 广州供电局有限公司 | Failure starting circuit and method for starting failure circuit |
| CN204947582U (en) * | 2015-06-24 | 2016-01-06 | 云南电网有限责任公司电力科学研究院 | Loop is distributed in the jumping of 220kV failure protection connection rationally |
| CN215071626U (en) * | 2021-06-21 | 2021-12-07 | 西安热工研究院有限公司 | Double-bus differential protection combined-tripping steam turbine set loop |
-
2021
- 2021-06-21 CN CN202110688289.0A patent/CN113300335A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130271879A1 (en) * | 2012-04-17 | 2013-10-17 | Siemens Aktiengesellschaft | Fault Protection System For A Power System Of Dynamically Positioned Vessel |
| CN103840553A (en) * | 2014-02-26 | 2014-06-04 | 广州供电局有限公司 | Failure starting circuit and method for starting failure circuit |
| CN204947582U (en) * | 2015-06-24 | 2016-01-06 | 云南电网有限责任公司电力科学研究院 | Loop is distributed in the jumping of 220kV failure protection connection rationally |
| CN215071626U (en) * | 2021-06-21 | 2021-12-07 | 西安热工研究院有限公司 | Double-bus differential protection combined-tripping steam turbine set loop |
Non-Patent Citations (4)
| Title |
|---|
| 余荣云;彭世宽;陈凌;屠黎明;: "母线保护与变压器保护的接口问题", 电力系统保护与控制, no. 13, 1 July 2008 (2008-07-01), pages 52 - 56 * |
| 李民万;: "220kV变电站操作箱失灵联跳三侧回路改进", 云南电力技术, no. 2, 15 December 2015 (2015-12-15), pages 25 - 26 * |
| 杨朝菁;钱美芳;: "高压电网双母线接线断路器失灵保护回路设计分析与改进", 江苏电机工程, no. 03, 28 May 2009 (2009-05-28) * |
| 贺春;李鑫;: "220kV主变压器高压侧断路器失灵保护的若干问题分析", 电力系统保护与控制, no. 01, 1 January 2010 (2010-01-01) * |
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