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CN111323699B - A method for evaluating the service performance of transformer oil flow relays - Google Patents

A method for evaluating the service performance of transformer oil flow relays Download PDF

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CN111323699B
CN111323699B CN202010137929.4A CN202010137929A CN111323699B CN 111323699 B CN111323699 B CN 111323699B CN 202010137929 A CN202010137929 A CN 202010137929A CN 111323699 B CN111323699 B CN 111323699B
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oil flow
oil
relay
flow relay
service performance
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CN111323699A (en
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王东
周利军
廖维
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Southwest Jiaotong University
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    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract

本发明公开了一种变压器油流继电器服役性能的测评方法。首先搭建变压器油流继电器服役性能评估综合测试平台，然后测试油流继电器的动作油流量、返回油流量及实际接点容量，然后通过动作油流量、返回油流量计算油流继电器的动作特性，通过接点容量值计算油流继电器的接点容量的性能参数，然后通过油流继电器的动作特性及接点容量性能参数获取评价服役性能的特征参量，最后通过特征参量对油流继电器的服役性能进行测评，所搭建的测试平台可同时快速地测量动作油流量、返回油流量及接点容量，所提出的测评方法可有效地评估变压器油流继电器的服役性能。

Figure 202010137929

The invention discloses a method for evaluating the service performance of a transformer oil flow relay. First, build a comprehensive test platform for the service performance evaluation of transformer oil flow relays, and then test the operating oil flow, return oil flow and actual contact capacity of the oil flow relay, and then calculate the operating characteristics of the oil flow relay through the operating oil flow and return oil flow. The capacity value calculates the performance parameters of the contact capacity of the oil flow relay, and then obtains the characteristic parameters for evaluating the service performance through the operating characteristics of the oil flow relay and the performance parameters of the contact capacity, and finally evaluates the service performance of the oil flow relay through the characteristic parameters. The test platform of the proposed method can simultaneously and quickly measure the operating oil flow, the return oil flow and the contact capacity. The proposed evaluation method can effectively evaluate the service performance of the transformer oil flow relay.

Figure 202010137929

Description

Method for evaluating service performance of transformer oil flow relay
Technical Field
The invention belongs to the field of performance evaluation of vehicle-mounted traction transformers, and particularly relates to a method for evaluating service performance of an oil flow relay of a transformer.
Background
The oil flow relay is an important device for protecting the vehicle-mounted traction transformer, the oil flow relay is used for monitoring the oil flow change condition of the transformer, oil flow is generated in an electric appliance connecting pipe after an oil pump is started, when the oil flow reaches a certain value (action oil flow), a movable plate in the relay rotates, an indicating part synchronously rotates through magnetic couple force, a signal contact is connected, a normal signal is sent out, when the oil flow is reduced to a certain value (return oil flow), the movable plate returns to send out a fault signal, an oil flow relay switch is closed, a closed loop is connected with a control system, and the vehicle-mounted traction transformer is cut off. Since the traction load has a large impact, the operating characteristics of the movable plate are also changed, thereby affecting the operating performance of the oil flow relay. When the oil flow is not enough, the oil flow relay cannot act in time, the heat dissipation of the vehicle-mounted traction transformer is not in time, hidden dangers are brought to the safe operation of the vehicle-mounted traction transformer, the safe operation of the vehicle-mounted transformer is vital to ensuring the normal operation of a train, and in order to reduce necessary accidents, an evaluation method capable of effectively judging the service performance of the oil flow relay is urgently needed.
Disclosure of Invention
A method for evaluating service performance of a transformer oil flow relay comprises the following steps:
the first step is as follows: comprehensive test platform for service performance evaluation of oil flow relay of built transformer
A comprehensive test platform for evaluating service performance of a transformer oil flow relay is built, the test platform mainly comprises an oil flow relay (1), an indicating device (2), a motor (3), an oil conveying pipe (4), a standard flowmeter (5), an oil tank (6), transformer oil (7), a valve (8), a 220V alternating current power supply (9), an ammeter (10), a lead (11), a lower end oil outlet (12) and an upper end oil inlet (13), the valve (8) is 10cm away from the lower end oil outlet (12), the valve (8) is closed, the transformer oil (7) is filled in the oil tank (6), the liquid level of the transformer oil (7) is located at 3/4 of the height of the oil tank (6), the valve (8) is opened, the transformer oil (7) flows into the oil conveying pipe (4) through the lower end oil outlet (12), passes through the motor (3), the standard flowmeter (5) and the oil flow relay (1), the standard flowmeter (5) displays the oil flow of transformer oil (7) in the oil conveying pipe (4), the 220V alternating current power supply (9) is connected with the oil flow relay (1), the indicating device (2) and the ammeter (10) through a lead (11) to form a loop, the ammeter (10) displays the real-time current value of the oil flow relay (1), and the indicating device (2) displays the working state of the oil flow relay (1) and sends a corresponding signal;
the second step is that: parameter measurement
Testing the operating oil flow Q of an oil flow relaydFlow rate Q of return oiltAnd power ScEach 5 times is denoted as Qd,i、Qt,i、Sc,iAnd i represents the test times, and takes the values of 1, 2, 3, 4 and 5;
a 220V alternating current power supply (9) is connected, the motor (3) is started, and the valve (8) is adjusted to increase the oil flow of the transformer until the oil flow relay (1)The indicating device (2) sends out a normal working signal when the operation is performed, the reading of the standard flowmeter (5) at the moment is recorded as the operation oil flow Qd,iUnit is m3H; and (3) regulating the valve (8) again to reduce the oil flow of the transformer until the oil flow relay (1) acts and the indicating device (2) sends out a fault signal, recording the reading of the standard flowmeter (5) at the moment, and recording the reading as the return oil flow Qt,iUnit is m3H; recording the current value flowing through the ammeter (10) for the ith time as Ic,iCalculating the contact capacity S of the ith oil flow relayc,i：
Sc,i＝220Ic,i (1)
The third step: determining the action characteristic eta of the oil flow relay:
Figure GDA0002813830350000021
in the formula, QdminThe minimum value of the oil flow relay is expressed in m3H, which is determined according to the nominal pipe diameter r of the oil flow relay (1) and satisfies the following functional relation:
Figure GDA0002813830350000022
Q0the rated oil flow of the oil flow relay is shown in m3H, which is determined according to the nominal pipe diameter r of the oil flow relay (1) and satisfies the following functional relation:
Figure GDA0002813830350000023
the specific rated oil flow value is determined according to a nameplate of the oil flow relay;
the fourth step: performance parameter lambda for determining the contact capacity of an oil flow relay
Calculating a performance parameter λ of the contact capacity:
Figure GDA0002813830350000024
in the formula I0Rated current of the oil flow relay;
the fifth step: determining characteristic parameter epsilon of service performance of oil flow relay
Calculating a service performance characteristic parameter epsilon of the oil flow relay:
Figure GDA0002813830350000031
and a sixth step: service performance assessment
Calculating characteristic parameter epsilon of transformer oil flow relay to be evaluated0When epsilon0When the service performance of the oil flow relay is more than or equal to 0.8, the service performance of the oil flow relay is excellent; when 0.5<ε0<When 0.8 hour, the oil flow relay has good service performance, and the oil flow relay is considered to be replaced; when epsilon0When the service performance of the oil flow relay is less than or equal to 0.5, the oil flow relay is immediately replaced.
The invention has the advantages that:
the invention provides a method for evaluating service performance of an oil flow relay of a transformer, according to the experimental method disclosed by the invention, a test system is firstly set up, then characteristic parameters such as action oil flow, return oil flow, power and the like are obtained through experiments, action characteristics are calculated according to the action oil flow and the return oil flow, performance parameters of the power are calculated according to the power characteristic quantity, the service performance characteristic parameters are calculated according to the action characteristics and the performance parameters of the power, the service performance of the oil flow relay is evaluated through the service performance characteristic parameters, and the evaluation of the service performance of the oil flow relay of the transformer is effectively improved through the experiments.
Drawings
Fig. 1 is a flow chart for evaluating service performance of an oil flow relay of a transformer.
Fig. 2 is a schematic diagram of an experimental platform for testing service performance of an oil flow relay of a transformer.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
fig. 2 is a schematic diagram of an experimental platform for testing service performance of an oil flow relay of a transformer. Fig. 1 shows that an experimental method for evaluating service performance of a transformer oil flow relay includes the following steps:
the first step is as follows: comprehensive test platform for service performance evaluation of oil flow relay of built transformer
A comprehensive test platform for evaluating service performance of a transformer oil flow relay is built, the test platform mainly comprises an oil flow relay (1), an indicating device (2), a motor (3), an oil conveying pipe (4), a standard flowmeter (5), an oil tank (6), transformer oil (7), a valve (8), a 220V alternating current power supply (9), an ammeter (10), a lead (11), a lower end oil outlet (12) and an upper end oil inlet (13), the valve (8) is 10cm away from the lower end oil outlet (12), the valve (8) is closed, the transformer oil (7) is filled in the oil tank (6), the liquid level of the transformer oil (7) is located at 3/4 of the height of the oil tank (6), the valve (8) is opened, the transformer oil (7) flows into the oil conveying pipe (4) through the lower end oil outlet (12), passes through the motor (3), the standard flowmeter (5) and the oil flow relay (1), the standard flowmeter (5) displays the oil flow of transformer oil (7) in the oil conveying pipe (4), the 220V alternating current power supply (9) is connected with the oil flow relay (1), the indicating device (2) and the ammeter (10) through a lead (11) to form a loop, the ammeter (10) displays the real-time current value of the oil flow relay (1), and the indicating device (2) displays the working state of the oil flow relay (1) and sends a corresponding signal;
the second step is that: parameter measurement
Testing the operating oil flow Q of an oil flow relaydFlow rate Q of return oiltAnd power ScEach 5 times is denoted as Qd,i、Qt,i、Sc,iAnd i represents the test times, and takes the values of 1, 2, 3, 4 and 5;
a 220V alternating current power supply (9) is connected, the motor (3) is started, the valve (8) is adjusted to increase the transformer oil flow until the oil flow relay (1) acts and the indicating device (2) sends a normal working signal, the indication number of the standard flowmeter (5) at the moment is recorded and recorded as the acting oil flow Qd,iUnit is m3H; readjusting the valve (8) to reduce the transformer oil flowMeasuring until the oil flow relay (1) acts and the indicating device (2) sends out a fault signal, recording the indication number of the standard flowmeter (5) at the moment and recording the indication number as the return oil flow Qt,iUnit is m3H; recording the current value flowing through the ammeter (10) for the ith time as Ic,iCalculating the contact capacity S of the ith oil flow relayc,i：
Sc,i＝220Ic,i (1)
The third step: determining the action characteristic eta of the oil flow relay:
Figure GDA0002813830350000041
in the formula, QdminThe minimum value of the oil flow relay is expressed in m3H, which is determined according to the nominal pipe diameter r of the oil flow relay (1) and satisfies the following functional relation:
Figure GDA0002813830350000042
Q0the rated oil flow of the oil flow relay is shown in m3H, which is determined according to the nominal pipe diameter r of the oil flow relay (1) and satisfies the following functional relation:
Figure GDA0002813830350000043
the specific rated oil flow value is determined according to a nameplate of the oil flow relay;
the fourth step: performance parameter lambda for determining the contact capacity of an oil flow relay
Calculating a performance parameter λ of the contact capacity:
Figure GDA0002813830350000051
in the formula I0Relaying for oil flowThe rated current of the device;
the fifth step: determining characteristic parameter epsilon of service performance of oil flow relay
Calculating a service performance characteristic parameter epsilon of the oil flow relay:
Figure GDA0002813830350000052
and a sixth step: service performance assessment
Calculating characteristic parameter epsilon of transformer oil flow relay to be evaluated0When epsilon0When the service performance of the oil flow relay is more than or equal to 0.8, the service performance of the oil flow relay is excellent; when 0.5<ε0<When 0.8 hour, the oil flow relay has good service performance, and the oil flow relay is considered to be replaced; when epsilon0When the service performance of the oil flow relay is less than or equal to 0.5, the oil flow relay is immediately replaced.

Claims (1)

1.一种变压器油流继电器服役性能的测评方法，其特征在于，包括以下步骤：1. a method for evaluating the service performance of a transformer oil flow relay, is characterized in that, comprises the following steps: 第一步：搭建变压器油流继电器服役性能评估综合试验平台Step 1: Build a comprehensive test platform for service performance evaluation of transformer oil flow relays 搭建变压器油流继电器服役性能评估综合试验平台，试验平台主要由油流继电器(1)、指示装置(2)、电动机(3)、输油管(4)、标准流量计(5)、油箱(6)、变压器油(7)、阀门(8)、220V交流电源(9)、电流表(10)、导线(11)、下端出油口(12)、上端进油口(13)组成，阀门(8)距离下端出油口(12)10cm、关闭阀门(8)，油箱(6)内填充变压器油(7)，变压器油(7)液面位于油箱(6)高度的3/4处，打开阀门(8)，变压器油(7)通过下端出油口(12)流入输油管(4)，经电动机(3)、标准流量计(5)和油流继电器(1)至上端进油口(13)流入油箱(6)，标准流量计(5)显示输油管(4)中变压器油(7)的油流量，220V交流电源(9)通过导线(11)与油流继电器(1)、指示装置(2)和电流表(10)相连构成回路，电流表(10)显示油流继电器(1)实时的电流值，指示装置(2)显示油流继电器(1)的工作状态，发出相应的信号；Build a comprehensive test platform for service performance evaluation of transformer oil flow relays. The test platform is mainly composed of oil flow relays (1), indicating devices (2), motors (3), oil pipes (4), standard flow meters (5), and fuel tanks (6). , transformer oil (7), valve (8), 220V AC power supply (9), ammeter (10), wire (11), lower oil outlet (12), upper oil inlet (13), valve (8) 10cm away from the lower oil outlet (12), close the valve (8), fill the oil tank (6) with transformer oil (7), the liquid level of the transformer oil (7) is at 3/4 of the height of the oil tank (6), open the valve ( 8), the transformer oil (7) flows into the oil pipeline (4) through the lower oil outlet (12), and flows into the upper oil inlet (13) through the motor (3), the standard flow meter (5) and the oil flow relay (1) The oil tank (6), the standard flow meter (5) shows the oil flow of the transformer oil (7) in the oil pipeline (4), the 220V AC power supply (9) is connected with the oil flow relay (1) and the indicating device (2) through the wire (11) Connected with the ammeter (10) to form a loop, the ammeter (10) displays the real-time current value of the oil flow relay (1), the indicating device (2) displays the working state of the oil flow relay (1), and sends out corresponding signals; 第二步：参数测量Step 2: Parameter Measurement 测试油流继电器的动作油流量Qd、返回油流量Qt及功率Sc各5次，分别记为Qd,i、Qt,i、Sc,i，i表示测试次数，取值为1，2，3，4，5；Test the operating oil flow Q d , the return oil flow Q t and the power S c of the oil flow relay 5 times, respectively, denoted as Q d,i , Q t,i , S c,i , i represents the number of tests, the value is 1, 2, 3, 4, 5; 接通220V交流电源(9)，启动电动机(3)，调整阀门(8)增大变压器油流量直到油流继电器(1)动作且指示装置(2)发出正常工作信号，记录此时标准流量计(5)的示数，记为动作油流量Qd,i，单位为m3/h；再次调整阀门(8)减小变压器油流量直到油流继电器(1)动作且指示装置(2)发出故障信号，记录此时标准流量计(5)的示数，记为返回油流量Qt,i，单位为m3/h；记录第i次流过电流表(10)的电流值为Ic,i，计算第i次油流继电器的接点容量Sc,i：Turn on the 220V AC power supply (9), start the motor (3), adjust the valve (8) to increase the oil flow of the transformer until the oil flow relay (1) operates and the indicating device (2) sends out a normal working signal, and record the standard flowmeter at this time. The indication of (5) is recorded as the operating oil flow Q d,i , in m 3 /h; adjust the valve (8) again to reduce the transformer oil flow until the oil flow relay (1) operates and the indicating device (2) sends out Fault signal, record the indication of the standard flow meter (5) at this time, record it as the return oil flow Q t,i , the unit is m 3 /h; record the current value I c that flows through the ammeter (10) for the i-th time, i , calculate the contact capacity S c,i of the ith oil flow relay: Sc,i＝220Ic,i (1)S c,i =220I c,i (1) 第三步：确定油流继电器的动作特性η：The third step: determine the operating characteristics η of the oil flow relay:
Figure FDA0002813830340000011
Figure FDA0002813830340000011
 式中，Qdmin表示油流继电器动作油流量的最小值，这个值根据油流继电器(1)的管路标称直径r确定，满足下列函数关系：In the formula, Q dmin represents the minimum value of the operating oil flow of the oil flow relay, which is determined according to the nominal diameter r of the oil flow relay (1), and satisfies the following functional relationship:
Figure FDA0002813830340000021
Figure FDA0002813830340000021
 Q0表示油流继电器的额定油流量，这个值根据油流继电器(1)的管路标称直径r确定，满足下列函数关系：Q 0 represents the rated oil flow of the oil flow relay. This value is determined according to the nominal diameter r of the oil flow relay (1), which satisfies the following functional relationship:
Figure FDA0002813830340000022
Figure FDA0002813830340000022
 具体的额定油流量数值需根据油流继电器的铭牌确定；The specific rated oil flow value should be determined according to the nameplate of the oil flow relay; 第四步：确定油流继电器接点容量的性能参数λStep 4: Determine the performance parameter λ of the contact capacity of the oil flow relay 计算接点容量的性能参数λ：Calculate the performance parameter λ of the contact capacity:
Figure FDA0002813830340000023
Figure FDA0002813830340000023
 式中，I0为油流继电器的额定电流；In the formula, I 0 is the rated current of the oil flow relay; 第五步：确定油流继电器服役性能特征参量εStep 5: Determine the service performance characteristic parameter ε of the oil flow relay 计算油流继电器服役性能特征参量ε：Calculate the service performance characteristic parameter ε of the oil flow relay:
Figure FDA0002813830340000024
Figure FDA0002813830340000024
 第六步：服役性能评估Step 6: Service Performance Evaluation 计算待评估变压器油流继电器的特征参量ε0，当ε0≥0.8时,油流继电器服役性能优；当0.5<ε0<0.8时,油流继电器服役性能良，考虑更换油流继电器；当ε0≤0.5时，油流继电器服役性能差，立即更换油流继电器。Calculate the characteristic parameter ε 0 of the transformer oil flow relay to be evaluated. When ε 0 ≥0.8, the oil flow relay has excellent service performance; when 0.5<ε 0 <0.8, the oil flow relay has good service performance, and it is considered to replace the oil flow relay; When ε 0 ≤ 0.5, the service performance of the oil flow relay is poor, and the oil flow relay should be replaced immediately.
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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112577878B (en) * 2020-12-02 2021-08-13 西南交通大学 A method for evaluating the service performance of transformer respirator
CN116735092A (en) * 2023-05-04 2023-09-12 岭东核电有限公司 A performance testing method for oil flow indicator

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101051054A (en) * 2007-04-28 2007-10-10 郑州赛奥电子有限公司 Device and method for detecting heavy gas flow speed value of gas relay
CN201465901U (en) * 2009-07-29 2010-05-12 上海乐研电气科技有限公司 Oil charge anti-vibration sulfur hexafluoride gas density relay
KR101103817B1 (en) * 2009-10-16 2012-01-06 한전케이피에스 주식회사 Buchholz relay test equipment
CN102446617A (en) * 2010-10-09 2012-05-09 张莉莉 External cooling device for transformer oil body
CN105137345A (en) * 2015-09-15 2015-12-09 中国北车集团大连机车车辆有限公司 UK oil pressure protection relay test stand
CN106094898A (en) * 2016-07-06 2016-11-09 国家电网公司 A kind of gas relay flow velocity value coarse adjustment mechanism
CN106203863A (en) * 2016-07-15 2016-12-07 国网浙江省电力公司电力科学研究院 A kind of power transformer full dose state evaluation model of comprehensive multi-source information
WO2017199271A1 (en) * 2016-05-16 2017-11-23 有限会社智寛 Oil-water separation device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101667635B1 (en) * 2013-10-24 2016-10-19 엘에스산전 주식회사 Apparatus and method for diagnosing malfuction of high voltage relay device
CN109799452A (en) * 2019-01-09 2019-05-24 湖南鼎创装备有限公司 A kind of conspicuous electric relay detection device of cloth and method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101051054A (en) * 2007-04-28 2007-10-10 郑州赛奥电子有限公司 Device and method for detecting heavy gas flow speed value of gas relay
CN201465901U (en) * 2009-07-29 2010-05-12 上海乐研电气科技有限公司 Oil charge anti-vibration sulfur hexafluoride gas density relay
KR101103817B1 (en) * 2009-10-16 2012-01-06 한전케이피에스 주식회사 Buchholz relay test equipment
CN102446617A (en) * 2010-10-09 2012-05-09 张莉莉 External cooling device for transformer oil body
CN105137345A (en) * 2015-09-15 2015-12-09 中国北车集团大连机车车辆有限公司 UK oil pressure protection relay test stand
WO2017199271A1 (en) * 2016-05-16 2017-11-23 有限会社智寛 Oil-water separation device
CN106094898A (en) * 2016-07-06 2016-11-09 国家电网公司 A kind of gas relay flow velocity value coarse adjustment mechanism
CN106203863A (en) * 2016-07-15 2016-12-07 国网浙江省电力公司电力科学研究院 A kind of power transformer full dose state evaluation model of comprehensive multi-source information

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Design of Oil-Immersed Apparatus Oil Velocity Measure System Based on the Ultrasonic Wave Doppler Effect;Yiqi Dang等;《2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)》;20181018;全文 *
含控流阀的主变压器跳闸故障分析及防范方法;陈晓鹏;《电工技术》;20181231;全文 *

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