Control room of high-voltage power distribution cabinet

Abstract

The utility model relates to a control room of a high-voltage power distribution cabinet, which is characterized in that a control integrated device, an electrified display and a microcomputer protection device are arranged in the control room, and the control integrated device is connected into the microcomputer protection device; the control integrated device comprises a switching-on pressing plate, a switching-off pressing plate, a remote / local button, an energy storage button and a condensation controller; a current transformer, a voltage transformer, a sensor, a vacuum circuit breaker, a zero sequence current transformer, a humidity sensor and a heating plate are arranged in the high-voltage chamber; the current transformer and the voltage transformer are respectively connected to the microcomputer protection device; the switching-on pressure plate, the switching-off pressure plate, the remote / local button and the energy storage button are respectively connected to the vacuum circuit breaker to form a control loop; the zero sequence current transformer and the humidity sensor are respectively connected to the microcomputer protection device, and the microcomputer protection device is connected to the condensation controller and the heating plate to form a temperature and humidity control loop; and the protection functions of automatic monitoring of the high-voltage power distribution cabinet, vacuum circuit breaker control, energy storage, heating and the like are realized.

Description

Technical Field

[0001] The utility model belongs to the field of high-voltage power distribution, in particular to a control room of a high-voltage power distribution cabinet. Background Art

[0002] High-voltage switchgear plays the role of on-off, control or protection in the power generation, transmission, distribution, power conversion and consumption of the power system. The electrical products with voltage levels of 3-35kV to 550kV mainly include high-voltage disconnectors and grounding switches, high-voltage load switches, high-voltage automatic reclosers and sectionalizers, high-voltage operating mechanisms, high-voltage switchgear, etc. The high-voltage switchgear users sometimes cover dozens of households. The indoor metal armored center-mounted removable switchgear is a three-phase AC 50Hz indoor complete distribution device, which is mainly used to receive and distribute 3-12 kV network power and implement control, protection and monitoring of the circuit. In the prior art, when configuring a switch cabinet for high-voltage side electrical equipment with an input voltage of 10kV, a series of components such as ammeters, knobs, indicator lights, and protective pressure plates are generally installed on the instrument room door. The visible components are scattered and the wiring is complicated, which makes installation troublesome, wastes labor, and makes maintenance and operation inconvenient. At the same time, there are limitations on the voltage and current monitoring of the main circuit of the high-voltage switch cabinet and the automatic monitoring and control functions of overcurrent and voltage protection. The manual operation of the instrument room door is dispersed up and down, and there are major safety issues for high-voltage electrical equipment.

[0003] Therefore, for a large number of special transformer users, in addition to solving the problem of simplifying high-voltage power switch cabinet equipment, simplifying lines, and reducing costs, it is also necessary to improve the automatic control performance and safety of high-voltage switch equipment. This is an urgent problem that needs to be solved in order to facilitate its widespread promotion and use. Summary of the invention

[0004] The problem to be solved by the utility model is that the existing high-voltage switch cabinet has complex circuits, troublesome wiring, waste of labor, limited monitoring and control functions of the voltage and current of the main circuit, and overcurrent and voltage protection, as well as a series of safety hazards. A control room of a high-voltage power distribution cabinet is provided to simplify the circuits, and through the control integrated device and microcomputer protection device, the vacuum circuit breaker, energy storage, heating, etc. of the high-voltage power switch cabinet can be automatically controlled, the labor cost can be reduced, and the voltage and current monitoring function and protection function of the main circuit of the switch cabinet can be improved.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a control room of a high-voltage power distribution cabinet, mainly in which a control integrated device, a live display, and a microcomputer protection device are installed, and the control integrated device is connected to the microcomputer protection device;

[0006] The control integrated device includes a closing pressure plate, an opening pressure plate, a remote / local button, an energy storage button, and a condensation controller;

[0007] A partition is arranged on one side of the control room, and the other side of the partition is a high-voltage room, in which current transformers, voltage transformers, sensors, vacuum circuit breakers, zero-sequence current transformers, humidity sensors, and heating plates are installed; the closing pressure plate, opening pressure plate, remote / local buttons, and energy storage buttons are respectively connected to the vacuum circuit breaker;

[0008] The current transformer and the voltage transformer are respectively connected to the microcomputer protection device, and the microcomputer protection device is respectively connected to the closing pressure plate, the opening pressure plate, the remote / local button, and the energy storage button, and the closing pressure plate, the opening pressure plate, the remote / local button, and the energy storage button are respectively connected to the vacuum circuit breaker to form a control circuit;

[0009] The zero-sequence current transformer and the humidity sensor are respectively connected to a microcomputer protection device, the microcomputer protection device is connected to a condensation controller, and the condensation controller is connected to a heating plate to form a temperature and humidity control loop;

[0010] The charged display is connected to the sensor.

[0011] Preferably, the microcomputer protection device includes a single chip microcomputer, a CPU, and a relay.

[0012] Preferably, a door is provided on one side of the control room, and a power display is installed on the door.

[0013] The advantages and positive effects of utility models are:

[0014] 1. The control room of the high-voltage distribution cabinet of the utility model adopts a control integrated device, which simplifies the control integrated device and can automatically control the series of components and circuits previously installed on the instrument room door, such as ammeters, knobs, indicator lights, protection pressure plates, etc., to simplify the control integrated device and can automatically control, simplify the circuit, and reduce costs. The main circuit current and voltage of the switch cabinet can be monitored by current transformers and voltage transformers. The overcurrent and voltage protection of the main circuit in the high-voltage room can be controlled by closing pressure plates, opening pressure plates, remote / local buttons, and energy storage buttons. In conjunction with the microcomputer protection device, the control integrated device can automatically control the main circuit voltage and current monitoring and automatic protection monitoring.

[0015] 2. The control room of the high-voltage power distribution cabinet of the utility model adopts remote / local buttons installed in the control integrated device. In the remote operation mode, the closing and tripping circuits of the circuit breaker can be operated by remote control without directly approaching the circuit breaker itself. In the local operation mode, the operator can control it directly near the circuit breaker, so that direct manual intervention or remote control emergency operation when a fault occurs, the two modes can provide flexibility and safety of operation, and realize multifunctional protection of high-voltage electrical equipment.

[0016] 3. The control integrated device in the control room of the utility model high-voltage distribution cabinet is equipped with an energy storage button. Due to the use of energy storage circuit breaker, the automatic energy storage button of the circuit breaker converts the energy stored in the spring into electromagnetic energy through manual operation. When the circuit breaker is in the closed state, press the automatic energy storage button, the spring stores energy for use when the circuit breaker is opened, until the energy storage indicator lights up to indicate that the energy storage is completed. The circuit breaker opening operation enables the circuit breaker to quickly disconnect the circuit. This function is particularly important in the event of a power outage or failure, ensuring that the circuit is quickly disconnected to prevent further damage or dangerous situations.

[0017] 4. The control room of the high-voltage distribution cabinet of the utility model is equipped with a condensation controller due to the use of an integrated control device. The condensation controller is connected to the heating plate of the high-voltage room. When the temperature and humidity change values ​​of the humidity sensor are input into the microcomputer protection device, the microcomputer protection device controls the condensation controller to control the heating plate. Such a temperature and humidity control circuit can help maintain the appropriate temperature and humidity inside the switch cabinet, ensure that the equipment operates under specific environmental conditions, and avoid performance degradation or failure of electrical components due to low temperature or high humidity. Especially in high humidity areas, condensation may occur inside the switch cabinet. The use of a heating plate can effectively prevent the occurrence of such condensation, thereby avoiding possible electrical accidents and equipment damage, and ensuring the reliability and safety of the high-voltage switch cabinet under various environmental conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic side view of the structure circuit of a control room of a high-voltage power distribution cabinet.

[0019] 1-Control room, 2-Electrified display, 3-Microcomputer protection device, 4-Closing pressure plate, 5-Opening pressure plate, 6-Remote / local button, 7-Energy storage button 8-Control integrated device, 9-Door, 10-Partition, 11-Vacuum circuit breaker, 12-Condensation controller, 13-Heating plate, 14-Zero sequence current transformer, 15-Voltage transformer, 16-Temperature sensor, 17-Sensor, 18-Current transformer, 19-High voltage room. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to specific embodiments.

[0021] like Figure 1 As shown, a control room 1 of a high-voltage power distribution cabinet is used to divide the high-voltage switch cabinet into a control room 1 and a high-voltage room 19 by a partition. A door 9 is provided on one side of the control room 1. The control room 1 is at the upper end of the front of the cabinet body, and the rear half of the cabinet body is the high-voltage room 19. The control room 1 and the high-voltage room 19 are kept grounded. The shell and partition of the switch cabinet are made of aluminum-zinc coated steel plate processed by CNC machine tools.

[0022] The control room 1 is equipped with a control integrated device 8, a microcomputer protection device 3, and a live display 2. The control integrated device 8 is connected to the microcomputer protection device 3. The control integrated device 8 is respectively equipped with a closing pressure plate 4, an opening pressure plate 5, a remote / local button 6, an energy storage button 7, and a condensation controller 12; the microcomputer protection device 3 is composed of a chip single chip microcomputer, a CPU, and a relay. The high voltage room 19 is equipped with a current transformer 18, a voltage transformer 15, a sensor 17, a vacuum circuit breaker 11, a zero sequence current transformer 14, a temperature sensor 16, and a heating plate 13.

[0023] The current transformer 18 and the voltage transformer 15 are respectively connected to the microcomputer protection device 3. The current transformer 18 samples the main circuit current and the voltage transformer 15 feeds back the main circuit voltage to the microcomputer protection device 3. The microcomputer protection device 3 is respectively connected to the closing pressure plate 4, the opening pressure plate 5, the remote / local button 6, and the energy storage button 7. The microcomputer protection device 3 will immediately control the closing pressure plate 4, the opening pressure plate 5 and the energy storage button 7 when the sampled current and voltage value changes exceed the set value information. The closing pressure plate 4, the opening pressure plate 5, the remote / local button 6, and the energy storage button 7 are respectively connected to the vacuum circuit breaker 11. The closing pressure plate 4, the opening pressure plate 5, the remote / local button 6, and the energy storage button 7 act on the vacuum circuit breaker 11. The zero-sequence current transformer 14 and the temperature sensor 16 are respectively connected to the microcomputer protection device 3, the temperature and humidity change values ​​of the temperature sensor 16 are input into the microcomputer protection device 3, the microcomputer protection device 3 is connected to the condensation controller 12, the condensation controller 12 is connected to the heating plate 13, and the microcomputer protection device 3 controls the condensation controller 12 to control the heating plate 13. A door 9 is provided on one side of the control room 1, a live display 2 is installed on the door 9, and an observation window is provided on the door 9.

[0024] When the control room 1 of the high-voltage distribution cabinet is working, the incoming cable inputs the 10kV voltage main circuit of the power supply, and the power transformer converts the 10kV voltage of the power supply line into a 220V working voltage that can be used for the vacuum circuit breaker 11, the control room 1, and the microcomputer protection device 3 in the cabinet; after the 10kV incoming cable is energized, the 10KV input sensor 17 outputs 24V to the energized display, and the power indicator light on the energized display lights up to indicate that the incoming cable is energized.

[0025] The current transformer 18 on the main circuit in the high-voltage room 19 provides sampling current to the electric energy meter and the microcomputer protection device 3, and the voltage transformer 15 feeds back the main circuit voltage to the microcomputer protection device 3. The microcomputer protection device 3 monitors the changes in the sampling current and voltage values. The chip single-chip microcomputer, CPU, and relay of the microcomputer protection device 3 pre-set the current and voltage setting values, and fluctuate the sampling current and voltage value changes within the range. When the set value is exceeded, the closing pressure plate 4, the opening pressure plate 5, and the remote / local button 6 of the control integrated device 8 connected thereto receive the control signal operation, and directly control the tripping command to the vacuum circuit breaker 11 on the main circuit. The vacuum circuit breaker 11 will cut off the 10KV line and protect the outgoing line equipment. The remote / local button 6 is operated by remote control, or directly manually operated near the circuit breaker to intervene in emergency operations when a fault occurs. The two modes can provide flexibility and safety of operation and realize multi-functional protection of high-voltage electrical equipment. At the same time, when the vacuum circuit breaker 11 does not perform opening and closing actions, the energy storage button 7 in the control integrated device 8 automatically starts energy storage in preparation for controlling the vacuum circuit breaker 11 to operate; the temperature sensor 16 in the high-voltage chamber 19 detects that the temperature exceeds the set value, and the microcomputer protection device 3 receives the signal and instructs the condensation controller 12 in the control integrated device 8. The condensation controller 12 controls the heating plate 13 in the high-voltage chamber 19 to control the temperature and humidity to prevent condensation and improve safety in use.

[0026] The above embodiments of the utility model are described in detail, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the utility model should still fall within the scope of this patent.

Claims

1. A control room of a high-voltage power distribution cabinet, characterized in that: The control room is equipped with a control integrated device, a live display, and a microcomputer protection device, and the control integrated device is connected to the microcomputer protection device; The control integrated device includes a closing pressure plate, an opening pressure plate, a remote / local button, an energy storage button, and a condensation controller; A partition is arranged on one side of the control room, and the other side of the partition is a high-voltage room, in which current transformers, voltage transformers, sensors, vacuum circuit breakers, zero-sequence current transformers, humidity sensors, and heating plates are installed; the closing pressure plate, opening pressure plate, remote / local buttons, and energy storage buttons are respectively connected to the vacuum circuit breaker; The current transformer and the voltage transformer are respectively connected to the microcomputer protection device, and the microcomputer protection device is respectively connected to the closing pressure plate, the opening pressure plate, the remote / local button, and the energy storage button, and the closing pressure plate, the opening pressure plate, the remote / local button, and the energy storage button are respectively connected to the vacuum circuit breaker to form a control circuit; The zero-sequence current transformer and the humidity sensor are respectively connected to a microcomputer protection device, the microcomputer protection device is connected to a condensation controller, and the condensation controller is connected to a heating plate to form a temperature and humidity control loop; The charged display is connected to the sensor.

2. The control room of a high-voltage power distribution cabinet according to claim 1, characterized in that: The microcomputer protection device comprises a single chip microcomputer, a CPU and a relay.

3. The control room of a high-voltage power distribution cabinet according to claim 1, characterized in that: A door is arranged on one side of the control room, and a live display is installed on the door.

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