A high voltage switch simulator for relay protection testing

Abstract

The present invention discloses a high-voltage switch simulator for relay protection test, which relates to the technical field of high-voltage switch simulators, including a switch simulation module and a control module. The switch simulation module includes a switch unit and a high-voltage circuit breaker unit. A double-position relay is used to simulate a high-voltage circuit breaker, which can fully simulate the actual action of the high-voltage circuit breaker, and can be well matched with a protection device, and can obtain the open and closed position information of the simulated switch. Through the cascade holding relay, the closed position information of the circuit breaker required for the standby automatic test can also be obtained, which solves the problem that it is difficult for relay protection personnel to test and debug the device without power outage.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage switch simulators, and in particular to a high-voltage switch simulator for relay protection testing. Background Art

[0002] When inspecting and debugging devices in substations, it is often necessary to frequently operate circuit breakers to verify the accuracy of device action and the integrity of secondary circuits. However, when it comes to multi-compartment protection such as standby automatic switching and bus differential, since high-voltage equipment cannot be powered off, it is impossible to perform opening and closing tests on operating circuit breakers. In response to the above problems, the existing technology often uses a high-voltage switch simulator in the station to simulate the position information and other states of the high-voltage switch in the station, so as to realize the verification of protection equipment without power outage.

[0003] The traditional high-voltage switch simulator has the following problems during the device verification and debugging process: repeated opening and closing will have a certain impact on the healthy operation status of the high-voltage circuit breaker, thereby reducing the service life of the circuit breaker. Traditional simulation switches are usually integrated with protection inspection instruments, the equipment is bulky and requires an external power supply. In addition, when the circuit breaker is actually operated for a long time, other related work will be forced to stop, affecting the progress and quality of the work.

[0004] Therefore, how to calibrate the protection device without power outage and without affecting the operating status and service life of the protection device is a difficult problem that needs to be solved urgently in this field. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a high-voltage switch simulator for relay protection testing, which can solve the problem that it is difficult for relay protection personnel to inspect and debug the device without power outages.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] The first aspect of the present disclosure provides a high-voltage switch simulator for relay protection testing, comprising:

[0008] A switch simulation module, the switch simulation module includes a switch unit and a high-voltage circuit breaker unit, the switch unit includes a plurality of switches; the high-voltage circuit breaker unit includes a double-position relay for simulating the actual operation of the high-voltage circuit breaker; the double-position relay is connected to each switch through a dedicated test line;

[0009] The control module includes a controller and a control panel. The controller is used to collect information status of the switches and output switch instructions. The controller is electrically connected to each switch.

[0010] Furthermore, the high-voltage circuit breaker unit also includes a cascade holding relay for obtaining the circuit breaker closing position information required for the standby automatic switching test.

[0011] Furthermore, the switch and the two-position relay form a tripping circuit and a closing circuit.

[0012] Furthermore, the switch simulation module also includes an opening and closing monitoring unit, and the tripping circuit and the closing circuit are both externally connected to the opening and closing monitoring unit for monitoring the working status of the opening and closing coils.

[0013] Furthermore, the switch includes open position, closed position, tripping, closing, positive power supply and negative power supply wiring.

[0014] Furthermore, the open position, closed position, tripping, closing, positive power supply and negative power supply wiring of each switch are led from the terminal block to the control panel in the form of a plug-in line interface.

[0015] Furthermore, the dedicated test line is two meters long, with a plug-in connector at one end and a pin terminal at the other end.

[0016] Furthermore, it also includes a power supply module, which is a 220V power supply for common use by all switches.

[0017] Furthermore, it also includes a visualization screen, which is installed on the control panel and displays the information status of each switch collected by the controller in the form of switch status.

[0018] Furthermore, the high-voltage switch simulator for the relay protection test is packaged in a suitcase.

[0019] The beneficial effects of the above embodiments of the present invention are as follows:

[0020] The present invention provides a high-voltage switch simulator for relay protection test, which uses a double-position relay to simulate a high-voltage circuit breaker, can fully simulate the actual action of the high-voltage circuit breaker, and can cooperate well with the protection device, and can obtain the open and closed position information of the simulated switch. Through the cascade holding relay, the closed position information of the circuit breaker required for the standby automatic test can also be obtained, which solves the problem that it is difficult for relay protection personnel to test and debug the device without power outage.

[0021] The present invention controls and monitors the opening and closing states of the analog switch through a controller, analyzes the accuracy of the device action and the integrity of the secondary circuit, can effectively improve work efficiency and work quality, and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 This is a working principle diagram of the high-voltage switch simulator for relay protection testing of the present invention. DETAILED DESCRIPTION

[0024] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or their combinations;

[0026] Embodiment 1:

[0027] Embodiment 1 of the present disclosure provides a high-voltage switch simulator for relay protection test, which is packaged in a suitcase and includes:

[0028] The switch simulation module includes a switch unit and a high-voltage circuit breaker unit. The switch unit includes a plurality of switches. The high-voltage circuit breaker unit includes a dual-position relay for simulating the actual operation of the high-voltage circuit breaker. The dual-position relay is connected to each switch through a dedicated test line. The dual-position relay is used as a simulation unit of the high-voltage circuit breaker, which can not only fully simulate the actual operation of the high-voltage circuit breaker, but also cooperate well with the protection device, and can obtain the open and closed position information of the simulated switch. Since the dual-position relay is mechanically held by a magnet, its position will remain in the state before the control power disappears after the control power disappears, and will not return to the original state after power failure like an electric holding relay. Therefore, in some embodiments, the high-voltage circuit breaker unit also includes a cascade holding relay for obtaining the closed position information of the circuit breaker required for the standby automatic test.

[0029] The switch includes open position, closed position, tripping, closing, positive power supply and negative power supply wiring, which are used to realize the closing and tripping functions. The switch and the two-position relay form a tripping circuit and a closing circuit. The tripping circuit is used to open the circuit breaker or disconnect the contactor. The closing circuit is used to close the circuit breaker or close the contactor.

[0030] The tripping circuit and the closing circuit are both externally connected to the opening and closing monitoring unit for monitoring the working status of the opening and closing coils. The opening and closing monitoring unit specifically includes: a DC control bus, a closing monitoring circuit, and an opening monitoring circuit. The closing monitoring circuit and the opening monitoring circuit are both connected to the positive and negative poles of the DC control bus; the closing monitoring circuit includes a closing coil, a circuit breaker normally closed contact, a closing switch, and a current limiting resistor, and the closing coil, the circuit breaker normally closed contact, and the current limiting resistor are connected in series in sequence; the opening monitoring circuit includes an opening coil, a circuit breaker normally open contact, a current limiting resistor, and an opening switch, and the opening coil, the circuit breaker normally open contact, and the current limiting resistor are connected in series in sequence. It is possible to monitor whether the opening and closing coils are damaged in the secondary circuit of the circuit breaker, and to monitor the on and off of the operating power supply. The current limiting resistor prevents the switch from malfunctioning when the relay burns out.

[0031] The switch-on / off monitoring unit is electrically connected to the control module, and the switch-on / off circuit conditions are monitored by controlling the switch-on / off monitoring unit through the control module.

[0032] It also includes a power module, which is a 220V power supply. The terminal block inside the device effectively connects and expands the input and output of each relay, so that the three internal switch modules can share a set of 220V power supply and can independently realize the function of each switch. The terminal block can make the wiring of the switch module clearer, so as to facilitate the extraction of the open position, closed position, tripping, closing, positive power supply and negative power supply of each switch.

[0033] The control module includes a controller and a control panel. The controller is used to collect the information status of the switch and output the switch command. The controller is electrically connected to each switch. A visual screen is installed on the control panel to display the information status of each switch collected by the controller in the form of switch status.

[0034] The high-voltage switch simulator for relay protection test adopts the form of plug-in line interface, which leads the opening, closing, tripping, closing, positive power supply and negative power supply wiring of each switch from the terminal block to the control panel, and sets independent tripping and closing buttons. It uses a 2-meter-long special test line with a plug-in head at one end and a pin terminal at the other end, which is convenient for connecting to the high-voltage circuit breaker unit terminal block.

[0035] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high voltage switch simulator for relay protection testing, characterized in that: include: A switch simulation module, the switch simulation module includes a switch unit and a high-voltage circuit breaker unit, the switch unit includes a plurality of switches; the high-voltage circuit breaker unit includes a double-position relay for simulating the actual operation of the high-voltage circuit breaker; the double-position relay is connected to each switch through a dedicated test line; The switch and the two-position relay form a tripping circuit and a closing circuit; The switch simulation module also includes a switch-on and switch-off monitoring unit, and the trip circuit and the switch-on circuit are both externally connected to the switch-on and switch-off monitoring unit, which is used to monitor the working state of the switch-on and switch-off coils; monitor whether the switch-on and switch-off coils are damaged in the secondary circuit of the circuit breaker, and monitor the on and off of the operating power supply; The closing and opening monitoring unit specifically includes: a DC control bus, a closing monitoring circuit, and an opening monitoring circuit; The closing monitoring circuit and the opening monitoring circuit are both connected to the positive and negative poles of the DC control bus; the closing monitoring circuit includes a closing coil, a circuit breaker normally closed contact, a closing switch, and a current limiting resistor, and the closing coil, the circuit breaker normally closed contact and the current limiting resistor are connected in series in sequence; the opening monitoring circuit includes an opening coil, a circuit breaker normally open contact, a current limiting resistor, and an opening switch, and the opening coil, the circuit breaker normally open contact and the current limiting resistor are connected in series in sequence; The control module includes a controller and a control panel. The controller is used to collect information status of the switches and output switch instructions. The controller is electrically connected to each switch.

2. A high-voltage switch simulator for relay protection testing as claimed in claim 1, characterized in that: The high-voltage circuit breaker unit also includes a cascade holding relay for obtaining the circuit breaker closing position information required for the standby automatic switching test.

3. A high-voltage switch simulator for relay protection testing as claimed in claim 1, characterized in that: The switch includes open position, closed position, tripping, closing, positive power supply and negative power supply wiring.

4. A high-voltage switch simulator for relay protection testing as claimed in claim 3, characterized in that: The open, closed, tripped, closed, positive power supply and negative power supply wiring of each switch are led from the terminal block to the control panel in the form of a plug-in line interface.

5. A high-voltage switch simulator for relay protection testing as claimed in claim 1, characterized in that: The dedicated test line is two meters long, with a plug-in connector at one end and a pin terminal at the other end.

6. A high-voltage switch simulator for relay protection testing as claimed in claim 1, characterized in that: It also includes a power module, which is a 220V power supply for common use by all switches.

7. A high voltage switch simulator for relay protection testing as claimed in claim 1, characterized in that: It also includes a visualization screen, which is installed on the control panel and displays the information status of each switch collected by the controller in the form of switch status.

8. A high-voltage switch simulator for relay protection testing as claimed in claim 1, characterized in that: The high-voltage switch simulator for relay protection testing is packaged in a suitcase.

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