Capacity-adjusting arc suppression coil gear control module

Abstract

The utility model discloses a capacitance-adjusting arc suppression coil gear control module which comprises an isolation unit and a counting control unit, the input end of the isolation unit is connected with the gear control signal output end of a turn-adjusting arc suppression coil controller, and the output end of the isolation unit is connected with the input end of the counting control unit. And the counting control unit counts the upshift control signal and the downshift control signal and outputs the signals to the capacitor switching switch of the capacitor box after level conversion to control the switching of the capacitor. The utility model is applied to the transformation of an on-site arc suppression coil device, that is, when the turn-adjusting arc suppression coil controller is adopted to control the capacitance box to adjust the gear of the arc suppression coil, the turn-adjusting arc suppression coil controller does not need to be replaced, and the gear adjustment of the arc suppression coil can be carried out only by connecting the turn-adjusting arc suppression coil controller with a capacitor, so that the operation is simple and convenient. On-site transformation is facilitated, the transformation cost is reduced, and standardization of the arc suppression coil controller is also facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to power equipment control technical field, especially a kind of regulating capacity arc-extinguishing coil gear control module. BACKGROUND

[0002] The function of arc-extinguishing coil is to provide inductance current compensation when single-phase grounding fault occurs in power grid, so that the current of fault point is reduced to below 10A, which is conducive to preventing arc reignition after arc light zero-crossing, achieving the purpose of arc extinction, reducing the probability of high amplitude overvoltage occurrence, and preventing further expansion of the accident.

[0003] Arc-extinguishing coil mainly includes regulating capacity arc-extinguishing coil, regulating turn arc-extinguishing coil and phase control arc-extinguishing coil. Among them, the regulating capacity arc-extinguishing coil can act quickly when single-phase grounding fault occurs in the system, eliminate arc by adjusting inductance, prevent fault expansion; It can also track the change of power grid capacitance to ground in real time and automatically adjust the inductance value for compensation to ensure stable operation of the power grid.

[0004] The traditional regulating capacity arc-extinguishing coil control is realized by a special controller for regulating capacity arc-extinguishing coil. The controller has N relays built-in, which control N capacitors in the capacitor box of the regulating capacity arc-extinguishing coil. That is, the regulating capacity arc-extinguishing coil needs a special controller for control. For the system using regulating turn arc-extinguishing coil controller, when the on-load regulating switch is replaced by the capacitor box to regulate the arc-extinguishing coil, the regulating turn arc-extinguishing coil controller needs to be replaced by the regulating capacity arc-extinguishing coil controller at the same time, which is costly for on-site technical transformation. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to provide a regulating capacity arc-extinguishing coil gear control module, which can be used for on-site transformation and can be matched with a regulating turn arc-extinguishing coil controller to control the gear of the capacitor box, thereby reducing the transformation cost.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is as follows.

[0007] A regulating capacity arc-extinguishing coil gear control module includes an isolation unit for receiving the up-down gear control signal of the regulating turn arc-extinguishing coil controller and a counting control unit for counting the up-down gear control signal. The input end of the isolation unit is connected to the gear control signal output end of the regulating turn arc-extinguishing coil controller. The output end of the isolation unit is connected to the input end of the counting control unit. The counting control unit counts the up-down gear control signal and outputs the level conversion to the capacitor switching switch of the capacitor box to control the switching of the capacitor.

[0008] Preferably: the isolation unit comprises a step-up optical coupler and a step-down optical coupler connected in parallel, the positive input end of the step-up optical coupler is connected to the step-up control signal output end of the turn-adjusting arc-extinguishing coil controller, the positive input end of the step-down optical coupler is connected to the step-down control signal output end of the turn-adjusting arc-extinguishing coil controller, and the negative input ends of the step-up optical coupler and the step-down optical coupler are connected to ground; the output end of the step-up optical coupler is connected to the count-in end of the count control unit for accumulation operation, and the output end of the step-down optical coupler is connected to the count-out end of the count control unit for count-down operation; and the signal output end of the count control unit is connected to the controlled end of the capacitor switching switch in the capacitor box.

[0009] Preferably: the count control unit comprises at least one reversible counter chip 74193.

[0010] Preferably: the capacitor switching switch is a vacuum contactor.

[0011] Thanks to the above technical solutions, the technical progress achieved by the utility model is as follows.

[0012] The utility model is applied to the modification of on-site arc-extinguishing coil devices, that is, when the capacitor box is controlled by the turn-adjusting arc-extinguishing coil controller to adjust the arc-extinguishing coil gear, the turn-adjusting arc-extinguishing coil controller does not need to be replaced, and the utility model only needs to be connected between the turn-adjusting arc-extinguishing coil controller and the capacitor, so that the arc-extinguishing coil gear can be adjusted, which is not only beneficial to on-site modification and reduction of modification cost but also beneficial to the standardization of the arc-extinguishing coil controller. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is an electrical schematic diagram of the utility model;

[0014] Figure 2 It is a wiring diagram of the utility model applied to the turn-adjusting arc-extinguishing coil.

[0015] OC1. Step-up optical coupler, OC2. Step-down optical coupler, U1. First reversible counter chip, U2. Second reversible counter chip. DETAILED DESCRIPTION

[0016] The utility model will be further described in detail in combination with the drawings and specific embodiments.

[0017] A turn-adjusting arc-extinguishing coil gear control module has the structure as shown in the figure, which comprises an isolation unit and a count control unit. Figure 1 The isolation unit is used for receiving the step-up control signal and the step-down control signal of the turn-adjusting arc-extinguishing coil controller, performing isolation and level conversion, and outputting to the count control unit; and the count control unit is used for counting the step-up and step-down control signals and outputting a control signal to the capacitor switching switch of the capacitor box.

[0018] The isolation unit comprises a step-up optocoupler and a step-down optocoupler connected in parallel, the positive input end of the step-up optocoupler is connected to the step-up control signal output end of the turn ratio arc-extinguishing coil controller, the positive input end of the step-down optocoupler is connected to the step-down control signal output end of the turn ratio arc-extinguishing coil controller, and the negative input ends of the step-up optocoupler and the step-down optocoupler are connected to ground; the output end of the step-up optocoupler is connected to the count-up end of the count control unit for cumulative operation, and the output end of the step-down optocoupler is connected to the count-down end of the count control unit for cumulative operation; and the signal output end of the count control unit is connected to the controlled end of the capacitor switching switch in the capacitor box.

[0019] In the utility model, the step-up optocoupler and the step-down optocoupler can adopt chip TLP127, which adopts integrated optical IC technology, has the characteristics of low power consumption, high transmission rate and wide working temperature range, and can realize high-speed data transmission and level conversion while providing electrical isolation.

[0020] The core of the count control unit is a reversible counter chip 74193, which is a synchronous four-bit binary reversible counter, has the functions of double clock input, asynchronous clear and asynchronous number setting, and can realize cumulative counting of the step-up control signal and cumulative counting of the step-down control signal; and through Q A , Q B , Q C , Q D and other outputs, the capacitor switching switch J1-J4 in the capacitor box is driven to act, and then the corresponding capacitor in the capacitor box is controlled to be put in or taken out, so that the arc-extinguishing coil is adjusted.

[0021] When the capacitors in the capacitor box are more, two reversible counter chips U1 and U2 can be cascaded, and the outputs of the cascaded reversible counter chip groups correspond to the putting in and taking out of the capacitors respectively.

[0022] The utility model is used for controlling the capacitor box by the turn ratio arc-extinguishing coil controller, and the connection relationship is shown in Figure 2 . In the embodiment, five capacitors are arranged in the capacitor box, so the count control unit comprises two cascaded reversible counter chips U1 and U2; the capacitor switching switch in the capacitor box is a vacuum contactor; the positive input end of the step-up optocoupler OC1 receives the step-up control signal of the turn ratio arc-extinguishing coil controller, and the positive input end of the step-down optocoupler OC2 receives the step-down control signal of the turn ratio arc-extinguishing coil controller; the output end of the step-up optocoupler OC1 is connected to the count-up end 1CP U of the reversible counter chip U1, and the output end of the step-down optocoupler OC2 is connected to the count-down end 1CP DThe first output end of the reversible counter chip U2 is connected to the controlled end of the vacuum contactor J5 for controlling the switching of the capacitor C5.

[0023] The working principle of the utility model is: the isolation unit receives the gear-up control signal and the gear-down control signal of the turn control arc suppression coil controller, realizes the isolation and the level conversion, and then sends to the counting control unit, the counting control unit outputs the control signal after adding and subtracting the count to drive the capacitor switching of the capacitor box, and then controls the capacitor of the capacitor box to switch, realizes the gear adjustment of the arc suppression coil.

Claims

1. A regulation and capacity arc suppression coil gear control module, characterized by: The isolation unit comprises a upshift optocoupler and a downshift optocoupler connected in parallel, the positive input end of the upshift optocoupler is connected to the upshift control signal output end of the variable-turning arc-extinguishing coil controller, the positive input end of the downshift optocoupler is connected to the downshift control signal output end of the variable-turning arc-extinguishing coil controller, and the negative input ends of the upshift optocoupler and the downshift optocoupler are connected to the ground; the output end of the upshift optocoupler is connected to the plus counting end of the counting control unit for accumulation operation, the output end of the downshift optocoupler is connected to the minus counting end of the counting control unit for accumulation operation; and the signal output end of the counting control unit is connected to the controlled end of the capacitor switching switch in the capacitor box.

2. The regulation and capacitance arc suppression coil gear control module according to claim 1, characterized in that: The isolation unit comprises a upshift optocoupler and a downshift optocoupler connected in parallel, the positive input end of the upshift optocoupler is connected to the upshift control signal output end of the variable-turning arc-extinguishing coil controller, the positive input end of the downshift optocoupler is connected to the downshift control signal output end of the variable-turning arc-extinguishing coil controller, and the negative input ends of the upshift optocoupler and the downshift optocoupler are connected to the ground; the output end of the upshift optocoupler is connected to the plus counting end of the counting control unit for accumulation operation, the output end of the downshift optocoupler is connected to the minus counting end of the counting control unit for accumulation operation; and the signal output end of the counting control unit is connected to the controlled end of the capacitor switching switch in the capacitor box.

3. A regulation and capacitance arc suppression coil gear control module according to claim 2, characterized in that: The counting control unit comprises at least one reversible counter chip 74193.

4. The regulation and capacitance arc suppression coil gear control module of claim 2, wherein: The capacitor switching switch is a vacuum contactor.

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