CN105116716A - Reclosing control system - Google Patents

Abstract

The invention discloses a reclosing control system. The reclosing control system comprises a reclosing device, a reclosing control circuit and a non-voltage detection device, wherein the reclosing control circuit is connected with the reclosing device through the non-voltage detection device; the non-voltage detection device is used for detecting voltage of the reclosing device; when the voltage of the reclosing device is zero, the reclosing device is communicated with the reclosing control circuit. When the reclosing circuit is communicated with the reclosing device, the reclosing device can be controlled to be switched on automatically after the reclosing device trips, the work efficiency is improved, and the power-off time is shortened. The non-voltage detection device can guarantee safety of reclosing performed when the voltage of the reclosing device is zero, reclosing operation performed under an electrified state is avoided, and the safety is high.

Description

A reclosing control system

technical field

The invention relates to the technical field of power supply systems, and more specifically, to a reclosing control system.

Background technique

After a phase-to-phase short circuit or a phase disconnection and grounding fault occur on the high-voltage line in the power supply system, in order to protect the safety of the person, the power grid, and the equipment, the switch in the direction of the incoming call must be disconnected to isolate the fault by means of a power outage. According to statistics, more than 80% of these faults are instantaneous, that is, the fault will be automatically eliminated soon, and then the switch will be closed, and the line can continue to run. In order to reduce the property loss and inconvenience caused by accidental power outages to users, it is necessary to shorten the power outage time as much as possible, and the power supply system needs to be equipped with a reclosing device for rapid reclosing to restore power supply.

After the existing reclosing device trips, operation and maintenance personnel need to go to the site to check that the equipment is in good condition before closing the switch. The work efficiency is low, and at the same time, the power outage time is longer.

Contents of the invention

In order to solve the above problems, the present invention provides a reclosing control system, which can realize automatic reclosing of a reclosing device.

To achieve the above object, the present invention provides the following technical solutions:

A reclosing control system, the reclosing control system comprising: a reclosing device, a reclosing control circuit and a no-voltage detection device;

The reclosing control circuit is connected to the reclosing device through the no-voltage detection device;

Wherein, the no-voltage detecting device is used to detect the voltage of the reclosing device, and connects the reclosing device and the reclosing control circuit when the voltage of the reclosing device is zero.

Preferably, in the above reclosing control system, the no-voltage detection device includes: an electromagnet or a relay.

Preferably, the above reclosing control system further includes: an alarm indicating device connected to the no-voltage detecting device, and the alarm indicating device sends out an alarm signal when the voltage of the reclosing device is not zero.

Preferably, in the above reclosing control system, further comprising: a voltage conversion device;

The voltage conversion device is used to convert the AC signal output by the no-voltage detection device into a DC signal, and the DC signal is used to drive the alarm indicating device.

Preferably, in the above reclosing control system, the alarm indication device is an LED signal indicator light or a buzzer.

Preferably, in the above-mentioned reclosing control system, it further includes: a display device connected to the no-voltage detection device, and the display device is used to display the voltage of the reclosing device.

Preferably, the above-mentioned reclosing control system further includes: a communication module connected to the no-voltage detection device, and the communication module is used to send the voltage of the reclosing device to a control terminal.

It can be seen from the above description that the reclosing control system provided by the present invention includes: a reclosing device, a reclosing control circuit and a no-voltage detection device; the reclosing control circuit is connected to the reclosing device through the no-voltage detection device; Wherein, the no-voltage detecting device is used to detect the voltage of the reclosing device, and connects the reclosing device and the reclosing control circuit when the voltage of the reclosing device is zero.

When the reclosing circuit is connected with the reclosing device, after the reclosing device trips, the reclosing device is controlled to automatically close, which improves the work efficiency and shortens the power-off time. The no-voltage detection device can ensure safe reclosing when the voltage of the reclosing device is zero, avoiding the re-switching operation of the reclosing device with electricity, and has high safety.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic structural diagram of a reclosing control system provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a reclosing control system provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of a circuit connection relationship between a voltage conversion device and an LED signal indicator light according to an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

An embodiment of the present application provides a reclosing control system, which can realize automatic reclosing, improve work efficiency, and shorten power-off time.

Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of a reclosing control system provided by an embodiment of the present application. The reclosing control system includes: a reclosing device 11 , a reclosing control circuit 12 and a no-voltage detection device 13 . The reclosing control circuit 12 is connected to the reclosing device 11 through the no-voltage detection device 13 .

Wherein, the no-voltage detecting device 13 is used for detecting the voltage of the reclosing device 11 , and connects the reclosing device 11 and the reclosing control circuit 12 when the voltage of the reclosing device 11 is zero.

In the reclosing control system described in the embodiment of the present application, when the reclosing control circuit 12 communicates with the reclosing device 11, if the reclosing device trips, the reclosing control circuit 12 controls the reclosing The gate device 11 performs a reclosing operation to realize automatic reclosing.

In the conventional reclosing control system, when the reclosing device trips, the reclosing control circuit directly controls the reclosing device to perform the reclosing operation. If the reclosing device is charged and reclosed, it will cause another trip, resulting in instability of the grid power supply, or even Damage accidents of electrical equipment, causing safety hazards.

Compared with the conventional reclosing control system, the reclosing control system described in the embodiment of the present application adds a no-voltage detection device 13 for detecting the voltage of the reclosing device 11, and when the voltage of the reclosing device 11 is zero, the reclosing device is connected. Gate device 11 and reclosing control circuit. Therefore, after the reclosing device 11 trips, the no-voltage detection device 13 connects the reclosing device 11 and the reclosing control circuit 12 only when the voltage of the reclosing device 11 is zero, avoiding the The reclosing device 11 performs the reclosing operation with electricity, which ensures the stable power supply of the power grid and improves the safety of the reclosing operation.

In the embodiment of the present application, the no-voltage detection device 13 includes: an electromagnet or a relay. An electromagnet or a relay is used as a switch between the reclosing device 11 and the reclosing control circuit 12. When the voltage of the reclosing device 11 is zero, the switch is turned on, and when it is not zero, it is turned off, thereby The reclosing control circuit 12 can only be connected to the reclosing device 11 when the reclosing device 11 trips and the voltage is zero, and the reclosing device 11 is controlled to perform automatic reclosing operation, which improves safety.

Referring to FIG. 2, FIG. 2 is a schematic structural diagram of a reclosing control system provided in the embodiment of the present application. The embodiment shown in FIG. 2 further includes: on the basis of the embodiment shown in FIG. connected to an alarm indicating device 21, and the alarm indicating device 21 sends out an alarm signal when the voltage of the reclosing device 21 is not zero.

In the embodiment shown in Figure 2, it also includes: a voltage conversion device 22; the voltage conversion device 22 is used to convert the AC signal output by the no-voltage detection device 13 into a DC signal, and the DC signal is used to drive the Alarm indication device 21. At this time, the reclosing control system may use a conventional DC alarm device as the alarm indicating device. For example, the alarm indicating device may be an LED signal indicator light, a buzzer, or the like.

Referring to FIG. 3 , FIG. 3 is a schematic diagram of a circuit connection relationship between a voltage conversion device and an LED signal indicator light according to an embodiment of the present application. The voltage conversion device includes: a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first divided voltage R1, a second divided resistor R2, a protection resistor R3, switch tube Q, filter capacitor C and relay J.

The anode of the first diode D1 is connected to the anode of the third diode D3, the cathode of the first diode D1 is connected to the anode of the second diode D2, and the anode of the fourth diode D4 is connected to the third diode The cathode of D3 and the cathode of the fourth diode D4 are connected to the cathode of the second diode D2. The cathode of the fourth diode D4 is connected to the upper plate of the filter capacitor C, and the anode of the first diode D1 is connected to the lower plate of the filter capacitor C.

The upper plate of the filter capacitor C is connected to the first end of the first voltage dividing resistor R, and the lower plate of the filter capacitor C is connected to the first end of the second voltage dividing resistor R2. The second end of the first voltage dividing resistor R1 is connected to the second end of the second voltage dividing resistor R2.

One end of the relay J is connected to the first end of the first voltage dividing resistor R1 through the protection resistor R and the LED signal indicator. The second end of the relay J is connected to the first pole of the switch tube. The control terminal of the switch tube Q is connected to the second terminal of the second voltage dividing resistor R2. The second pole of the switch tube Q is connected to the first end of the second voltage dividing resistor.

Generally, the rated input voltage of the no-voltage judgment alarm device is AC 110V, and the rated voltage of the coil when the relay J adopts a small power relay is DC 48V, and the rated voltage of the LED signal indicator is DC 36V, so it is necessary to design a simple voltage The conversion device converts the AC voltage output by the first terminal X1 and the second terminal X2 of the no-voltage judgment alarm device into a lower DC voltage, so as to drive the LED signal indicator light. AC 110V can be converted to DC 48V and 36V through diode rectification and resistor voltage division. The second voltage dividing resistor R2 is used to adjust the operating voltage of the relay as required.

In the embodiment shown in FIG. 2, the reclosing control system further includes: a display device 23 connected to the no-voltage detection device 13, and the display device 23 is used to display the voltage of the reclosing device 11, so that It is convenient for the maintenance personnel to observe the voltage of the reclosing device 11 intuitively during on-site detection, which is convenient for manual work.

Optionally, the reclosing control system further includes: a communication module 24 connected to the no-voltage detection device 13, and the communication module 24 is used to send the voltage of the reclosing device 11 to a control terminal. In this way, when the automatic reclosing operation cannot be performed due to the voltage of the reclosing device 11, the maintenance personnel can remotely obtain the voltage of the reclosing device 11, which is convenient for quickly confirming the power-off fault, so as to facilitate maintenance and arrangement work, and improve the efficiency of troubleshooting. efficiency.

From the above description, it can be seen that the reclosing control system described in the embodiment of the present application can realize automatic reclosing operation, and can avoid the live reclosing operation of the reclosing device 11, thereby improving the safety of the reclosing operation.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. a reclosing control system, is characterized in that, comprising: reclosing device, reclosing control circuit and pick-up unit with no pressure;

Described reclosing control circuit is connected with described reclosing device by described pick-up unit with no pressure;

Wherein, described pick-up unit with no pressure, for detecting the voltage of described reclosing device, when the voltage of described reclosing device is zero, is communicated with described reclosing device and described reclosing control circuit.

2. reclosing control system according to claim 1, is characterized in that, described pick-up unit with no pressure comprises: electromagnet or relay.

3. reclosing control system according to claim 1, is characterized in that, also comprise: the alarm indicator be connected with described pick-up unit with no pressure, and described alarm indicator sends alerting signal when the voltage of described reclosing device is non-vanishing.

4. reclosing control system according to claim 1, is characterized in that, also comprise: voltage conversion device;

The AC signal that described voltage conversion device is used for described pick-up unit with no pressure exports is converted to direct current signal, and described direct current signal is for driving described alarm indicator.

5. reclosing control system according to claim 4, is characterized in that, described alarm indicator is LED signal pilot lamp or hummer.

6. reclosing control system according to claim 1, is characterized in that, also comprise: the display device be connected with described pick-up unit with no pressure, and described display device is for showing the voltage of described reclosing device.

7. reclosing control system according to claim 1, is characterized in that, also comprise: the communication module be connected with described pick-up unit with no pressure, and described communication module is used for the voltage of described reclosing device to be sent to control terminal.