Intelligent high-voltage switch cabinet

Abstract

The utility model relates to an intelligent high-voltage switch cabinet, which is characterized by comprising a handcart circuit breaker chamber, a bus chamber, a cable chamber and an instrument chamber which are separated by partition plates, an incoming cable, a current transformer and a voltage transformer are arranged in the cable chamber and are connected through a main bus; the bus chamber is internally provided with a main bus and sleeved with an insulator, and the main bus is connected to the handcart circuit breaker chamber; a handcart circuit breaker is installed in the handcart circuit breaker chamber and is provided with an incoming line static contact box and an outgoing line static contact box, the incoming line static contact box penetrates through the partition plate to be connected to a current transformer of the cable chamber, and the outgoing line static contact box penetrates through the partition plate to be connected to a main bus of the bus chamber. A control device is arranged in the instrument chamber; the control device is connected with the handcart circuit breaker to form a control loop; the control device is connected with the current transformer to form a sampling current loop; a main bus is connected with an incoming cable, an incoming static contact box, a handcart circuit breaker, an outgoing static contact box and an outgoing cable to form a high-voltage main loop. The cabinet simplifies a high-voltage electric switch circuit, reduces the cost, and is convenient to operate and control.

Description

Technical Field

[0001] The utility model belongs to the field of high-voltage power distribution, and in particular relates to an intelligent high-voltage switch cabinet. Background Art

[0002] High-voltage switchgear users often cover dozens of households. Indoor metal-clad central removable switchgear is a three-phase AC 50Hz indoor complete power distribution device, which is mainly used to receive and distribute 3-12 kV network power and control, protect and monitor the circuit. The switch cabinet is configured with high-voltage side electrical equipment with an input voltage of 10kV. It is generally used to install relay protection devices, control panels, thermostats, ammeters, opening knobs, closing knobs, energy storage knobs, remote local knobs, live display instruments, protection pressure plates and other series of components on the instrument room door. The electrical components are scattered and the wiring is complicated, which is troublesome to install, wastes labor, is inconvenient to repair and operate, and has relatively limited performance and functions. At the same time, at the CAN bus control site with a communication interface, there are safety hazards in high-voltage electrical equipment, such as incorrect operation of the trolley vacuum circuit breaker, pushing and pulling the trolley with load, and closing the grounding switch with power on.

[0003] Therefore, for a large number of special transformer users, it is an urgent problem to simplify the high-voltage power switch cabinet equipment, simplify the lines, reduce costs, and improve the performance and safety of high-voltage switch equipment. Summary of the invention

[0004] The problem to be solved by the utility model is that the switch cabinets configured for the high-voltage electrical equipment of existing special transformer users have complex lines, troublesome installation, waste of labor and cost, limited performance and functions, and potential safety hazards. An intelligent high-voltage switch cabinet is provided to simplify the high-voltage electrical switch cabinet equipment, simplify the lines, reduce labor costs, improve the functionality and safety of the high-voltage switch cabinet, and facilitate operation.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: an intelligent high-voltage switch cabinet, mainly the high-voltage switch cabinet includes a trolley circuit breaker room, a busbar room, a cable room, and an instrument room, and each room is separated by a partition, and each room is grounded;

[0006] The cable room is equipped with incoming cables, current transformers, and voltage transformers, which are connected by a main busbar;

[0007] The busbar room is equipped with a main busbar, which is equipped with an insulator and fixed in the busbar room. One end of the main busbar is connected to the outgoing cable, and the other end of the main busbar is connected to the trolley circuit breaker room.

[0008] A trolley circuit breaker is installed in the trolley circuit breaker room, and an incoming static contact box and an outgoing static contact box are respectively provided on the trolley circuit breaker. The incoming static contact box passes through a partition to connect to the current transformer in the cable room, and the outgoing static contact box passes through a partition to connect to the main bus in the bus room;

[0009] A control device is installed in the instrument room, and the control device includes a relay and an ammeter;

[0010] The control device is connected with the trolley circuit breaker to form a control loop;

[0011] The control device is connected to the current transformer to form a sampling current loop;

[0012] The main busbar is connected with the incoming cable, the incoming static contact box, the trolley circuit breaker, the outgoing static contact box and the outgoing cable to form a high-voltage main circuit.

[0013] Preferably, a sensor, a grounding device and a lightning arrester are installed in the cable room, the sensor and the grounding device are respectively connected to the main bus of the cable room, and the lightning arrester is connected to the sensor.

[0014] Preferably, pressure relief devices are provided above the trolley circuit breaker, busbar chamber and cable chamber.

[0015] The advantages and positive effects of the utility model are:

[0016] 1. The utility model intelligent high-voltage switchgear adopts a cable room to install current transformers, voltage transformers, grounding devices, lightning arresters, and sensors. The current transformers and voltage transformers monitor the current and voltage of the 10kV main circuit. The control device is connected to the current transformer as a sampling current loop to monitor the electric energy of the sampling loop. In this way, the short-circuit and overcurrent protection functions on the outgoing line side are realized by setting the overcurrent setting value of the relay protection device, and the accident point is isolated to prevent the accident from being further amplified and causing a large-scale power outage in the power grid.

[0017] 2. The utility model intelligent high-voltage switch cabinet adopts a trolley circuit breaker with a test position and a working position in the cabinet. Each position is provided with an interlocking positioning device to prevent misoperation to ensure that the trolley cannot be moved at will when it is in the above positions. When moving the trolley, the interlocking must be released so that the circuit breaker trolley is opened before moving to prevent misoperation and improve safety. Static contact boxes are respectively arranged on the trolley circuit breaker. The incoming static contact box and the outgoing static contact box of the static contact box are respectively connected to the current transformer and the main bus. The control device is connected to the trolley circuit breaker as a control circuit to perform the static and dynamic switch of the trolley circuit breaker to control the high-voltage main circuit.

[0018] 3. The utility model intelligent high-voltage switchgear adopts the method of leading the main bus from one switchgear to another switchgear in the busbar room, and connecting the main bus and the incoming static contact box in the busbar room. The main bus is fixed in the busbar room with an insulator set and sealed with an insulating sleeve to avoid internal fault arcs, which can limit the spread of accidents to adjacent cabinets and ensure the mechanical strength of the busbar.

[0019] 4. The utility model intelligent high-voltage switch cabinet adopts an instrument room to set up a control device, which includes a relay, an ammeter, a temperature controller, a control panel, a button indicator light, etc. The control device is connected to the trolley circuit breaker. The high-voltage main circuit composed of the incoming cable, the incoming static contact box, the trolley circuit breaker, the outgoing static contact box, and the outgoing cable is controlled by the control device to receive and distribute network power and control, protect and monitor the circuit. This integrated circuit improves the functionality of use, reduces the wiring workload, and improves efficiency.

[0020] 5. The utility model intelligent high-voltage switch cabinet adopts a pressure relief device above the cable room. When an internal fault arc occurs in the circuit breaker or busbar, the internal air pressure of the switch cabinet increases, and the pressure release metal plate of the top device will be automatically opened to release the pressure and discharge the gas to ensure the safety of the operator and the switch cabinet; the trolley circuit breaker is provided with an anti-misoperation interlocking device. When the grounding device is in the open position, the trolley can be moved from the test position to the working position, providing reliable protection for the operator and the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a schematic side view of the structure circuit of an intelligent high-voltage switch cabinet.

[0022] 1-Instrument room, 2-Ammeter, 3-Relay, 4-Control device, 5-Control panel, 6-Buttons and indicator lights, 7-Trolley circuit breaker, 8-Trolley circuit breaker room, 9-Sensor, 10-Incoming cable, 11-Lightning arrester, 12-Voltage transformer, 13-Cable room, 14-Grounding device, 15-Current transformer, 16-Incoming static contact box, 17-Outgoing static contact box, 18-Bus room, 19-Insulator, 20-Partition, 21-Outgoing cable, 22-Main bus, 23-Pressure relief device. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to specific embodiments.

[0024] like Figure 1As shown, an intelligent high-voltage switch cabinet is divided into a trolley circuit breaker chamber 8, a busbar chamber 18, a cable chamber 13, and an instrument chamber 1 by a partition 20. The cable chamber 13 is in the lower part of the cabinet, the instrument chamber 1 and the trolley circuit breaker chamber 8 are in the front half of the cabinet, and the busbar chamber 18 is in the back half of the cabinet. Each chamber is separated by a partition 20, and each unit chamber is grounded. The shell and the partition 20 of the switch cabinet are made of aluminum-zinc coated steel plates processed by CNC machine tools, and multiple folding processes are used to increase the mechanical strength.

[0025] The incoming cable 10 enters the cable room 13 of the cabinet. The incoming cable 10, current transformer 15, and voltage transformer 12 are installed in the cable room 13 and connected by the main bus 22. The current transformer 15 and the voltage transformer 12 are connected to the main bus 22 respectively, and are used to sample the current and voltage of the main circuit. The sensor 9, the grounding device 14, and the lightning arrester 11 are installed on the other side of the cable room 13. The sensor 9 and the grounding device 14 are connected to the main bus 22 of the cable room 13 respectively, and the lightning arrester 11 is connected to the sensor 9. The trolley circuit breaker room 8, the bus room 18, and the instrument room 1 all have grounding devices 14. The grounding devices 14 are made of grounding copper bars. This bar runs through the adjacent cabinets and has good contact with the cabinet. The entire cabinet is spliced ​​with aluminum-zinc plates, so that the entire cabinet is in a good grounding state to ensure that the operating personnel touch the cabinet safely. Pressure relief devices 23 are provided above the trolley circuit breaker 7, the busbar chamber 18 and the cable chamber 13 for safe use.

[0026] The busbar chamber 18 contains a main busbar 22, on which an insulator 19 is mounted and fixed in the busbar chamber 18. The insulator 19 of the main busbar 22 is sealed with an insulating sleeve. If an internal fault arc occurs, the accident can be limited from spreading to the adjacent cabinet and the mechanical strength of the main busbar 22 can be guaranteed. One end of the main busbar 22 is connected to the outgoing cable 21, and the other end of the main busbar 22 is connected to the trolley circuit breaker chamber 8, which is an input cable from one switch cabinet to another.

[0027] The trolley circuit breaker 7 is installed in the trolley circuit breaker room 8. The trolley circuit breaker room 8 has a test position and a working position. Each position is equipped with an interlocking positioning device to ensure that the trolley circuit breaker 7 cannot be moved at will when it is in the above position. When moving the trolley, the interlock must be released so that the circuit breaker trolley is opened before moving to prevent misoperation. The trolley circuit breaker 7 is equipped with an incoming static contact box 16 and an outgoing static contact box 17. The incoming static contact box 16 passes through the partition 20 between the trolley circuit breaker room 8 and the cable room 13, and the incoming static contact box 16 is connected to the current transformer 15 in the cable room 13. The outgoing static contact box 17 passes through the partition 20 between the trolley circuit breaker room 8 and the bus room 18, and the outgoing static contact box 17 is connected to the main bus 22 in the bus room 18.

[0028] The control device 4 is installed in the instrument room 1. Relays 3 and other components can be installed in the instrument room 1 and on the door of the instrument room 1. The control device 4 includes a connection relay 3, an ammeter 2, a thermostat 4, a control panel 53, a button and an indicator light 6, etc. The control device 4 is connected to the trolley circuit breaker 7 as a control circuit; the control device 4 is connected to the current transformer 15 as a sampling current circuit to monitor the electric energy of the sampling circuit. The line of the instrument room 1 is 220V, and the input power supply voltage of the cable room 13 is 10KV. The incoming cable 10, the incoming static contact box 16, the trolley circuit breaker 7, the outgoing static contact box 17, and the outgoing cable 21 are connected through the main bus 22 to form a high-voltage main circuit.

[0029] The intelligent high-voltage switch cabinet can be used as an incoming line cabinet or an outgoing line cabinet. The switch cabinet is divided into a trolley circuit breaker room 8, a busbar room 18, a cable room 13, and an instrument room 1 by a partition 20, and the partition 20 is insulated and grounded to ensure the safety of the operator in the instrument room 1. When used as an incoming line switch cabinet, a 10KV power supply is input from the incoming cable 10 in the cable room 13. When the trolley circuit breaker 7 is in the working position, the power supply enters the trolley circuit breaker room 8 along the main bus 22, enters the trolley circuit breaker 7 from the incoming static contact box 16, and then enters the busbar room 18 main bus 22 of the outgoing static contact box 17, and is output from the outgoing cable 21. At the same time, the current transformer 15 and the voltage transformer 12 in the cable room 13 monitor the current and voltage of the main busbar 22 of the main circuit. The instrument room 1 control device 4 controls the trolley circuit breaker room 8, the cable room 13, and the busbar room 18 to receive and distribute 3-12 kV network power and implement control protection and monitoring of the circuit.

[0030] When working as an outlet cabinet of a high-voltage switch cabinet, the power supply 10KV enters the main bus 22 of the main main room from the power outlet, then enters the outlet static contact box 17 of the trolley circuit breaker room 8, and then enters the incoming static contact box 16 controlled by the trolley circuit breaker 7. At this time, the outlet static contact box 17 is the incoming static contact box 16, and vice versa, the incoming static contact box 16 is the outlet static contact box 17, and then the distributed electric energy is output from the incoming cable 10. Similarly, the current transformer 15 and the voltage transformer 12 sample the real current and voltage of the main bus 22 of the main circuit, and the control device 4 in the instrument room 1 controls and operates the main circuit.

[0031] 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. An intelligent high-voltage switch cabinet, characterized in that: The high-voltage switchgear includes a trolley circuit breaker room, a busbar room, a cable room, and an instrument room, and each room is separated by a partition and each room is grounded; The cable room is equipped with incoming cables, current transformers, and voltage transformers, which are connected by a main busbar; The busbar room is equipped with a main busbar, which is equipped with an insulator and fixed in the busbar room. One end of the main busbar is connected to the outgoing cable, and the other end of the main busbar is connected to the trolley circuit breaker room. A trolley circuit breaker is installed in the trolley circuit breaker room, and an incoming static contact box and an outgoing static contact box are respectively provided on the trolley circuit breaker. The incoming static contact box passes through a partition to connect to the current transformer in the cable room, and the outgoing static contact box passes through a partition to connect to the main bus in the bus room; A control device is installed in the instrument room, and the control device includes a relay and an ammeter; The control device is connected with the trolley circuit breaker to form a control loop; The control device is connected to the current transformer to form a sampling current loop; The main busbar is connected with the incoming cable, the incoming static contact box, the trolley circuit breaker, the outgoing static contact box and the outgoing cable to form a high-voltage main circuit.

2. The intelligent high-voltage switch cabinet according to claim 1, characterized in that: The cable room is equipped with a sensor, a grounding device, and a lightning arrester. The sensor and the grounding device are respectively connected to the main bus of the cable room, and the lightning arrester is connected to the sensor.

3. The intelligent high-voltage switch cabinet according to claim 1, characterized in that: Pressure relief devices are arranged above the trolley circuit breaker, the busbar chamber and the cable chamber.

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