Novel intelligent high-voltage cabinet sequence control system

Abstract

The utility model discloses a novel intelligent high-voltage cabinet sequence control system, which comprises a conventional 12kV high-voltage switch cabinet electric chassis vehicle, a grounding switch with a remote control electric operation function, a live-line state indicator, a position confirming travel switch, a sequence control comprehensive protector and the like, the switch cabinet has the characteristics of economy, high efficiency, electrical position indication, stable operation, intellectualization, reduced operation cost, manpower saving, and ensured power supply safety and reliability, and solves the problems of tedious and inaccurate switching operation flow and low operation efficiency of the existing switch cabinet.

Description

Technical Field

[0001] The utility model belongs to the technical field of switch cabinet control, and in particular relates to a novel intelligent high-voltage cabinet sequential control system. Background Art

[0002] The switching operation of the switch cabinet is one of the most frequently operated tasks in the switch cabinet field. The existing high-voltage switch cabinet is mainly composed of a cable room (including a grounding switch), a circuit breaker room (including a vacuum circuit breaker with a swing-in chassis), an instrument room (including instruments and protection devices), and a busbar room. The conventional operation process is: power supply process: manually or remotely open the grounding switch. After the grounding switch is opened, manually or the background confirms that the grounding switch is in place, and then swings the vacuum circuit breaker in. Manually or remotely swing the vacuum circuit breaker in. After the vacuum circuit breaker is shaken to the working position, manually or the background confirms that the vacuum circuit breaker is in the working position and closes the vacuum circuit breaker. Operation: manually or remotely close the vacuum circuit breaker, the circuit breaker performs the closing operation, after the closing is in place, manually or remotely confirm that the indicator light of the live display is on, and the power supply operation is completed; power outage process: manually or remotely open the vacuum circuit breaker, perform the opening operation of the vacuum circuit breaker, after the opening is in place, manually or remotely confirm that the indicator light of the live display is off, perform the vacuum circuit breaker swing-out operation, manually or remotely swing out the vacuum circuit breaker, after the vacuum circuit breaker is swung to the test position, manually or remotely confirm that the vacuum circuit breaker is in the test position, perform the closing operation of the grounding switch, manually or remotely close, after the grounding switch is closed, the power outage operation is completed.

[0003] From the above, it can be seen that the existing technical process is cumbersome, inaccurate, inefficient, time-consuming, and has high labor costs. At the same time, security and accuracy cannot be effectively guaranteed. Utility Model Content

[0004] The purpose of the utility model is to improve the deficiencies of the existing technology and provide a device that is economical and efficient, has electrical position indication, stable operation, intelligence, reduces operating costs, saves manpower, ensures power supply safety and reliability, and solves the problems of the existing switch cabinet switching operation process being cumbersome, inaccurate and having low operating efficiency.

[0005] The purpose of the utility model is achieved in this way. A new type of intelligent high-voltage cabinet sequential control system is characterized by including a 12kV high-voltage switch cabinet electric chassis, a grounding switch with remote control electric operation, a live state indicator, a confirmation position sensor, a state receiving device, and a sequential control integrated protector, wherein:

[0006] The 12kV high-voltage switch cabinet electric chassis is a conventional KYN28 cabinet circuit breaker chassis with a motor mechanism, which constitutes a chassis control circuit to realize electric propulsion and exit of the circuit breaker. It is equipped with a controller or integrated protector for remote control.

[0007] The earthing switch with remote control electric operation is a conventional JN15-12 earthing switch with an electric mechanism, which constitutes an electric control circuit of the earthing knife, realizes the electric operation of closing and opening the earthing knife, and is equipped with a controller or a comprehensive protector for remote control;

[0008] The live status indicator is a display for monitoring the live high voltage part, which can monitor 10kV high voltage electricity. The high voltage signal is transmitted to the live display through the 10kV high voltage sensor, and the corresponding indicator light is lit on the display. At the same time, the switch output function is configured, which can provide remote monitoring and status judgment.

[0009] The confirmation position sensor is used to monitor the circuit breaker stroke position and the ground switch opening and closing position, and is installed on the side wall of the circuit breaker chamber and the closing and opening rotation main shaft. When the circuit breaker trolley moves to the test position and the working position, the trolley position sensor senses the relevant position and can send a corresponding state quantity to the state receiving device. When the ground switch is in place for closing or opening, the ground switch position sensor senses the relevant position and can send a corresponding state quantity to the state receiving device.

[0010] The state receiving device is used to receive the position signal transmitted from the confirmation position sensor. The panel of the state receiving device has a corresponding indicator light. When the position is in place, the indicator light is on. At the same time, the device has a switch output function and a communication transmission function, and can provide remote monitoring and state judgment.

[0011] The sequential control protector is a controller used to comprehensively control the sequential execution of the electric chassis and electric ground knife of the KYN28 cabinet. It also has the overcurrent, quick-break and overload protection functions of the high-voltage cabinet. It has a built-in sequential control logic program and is capable of receiving remote control commands. Through the start command issued remotely, it starts the internal sequential control logic program, issues a running command to the electric chassis and the electric ground knife, executes sequential operations, and uploads the position signal through the confirmation position sensor and the status receiving device for judgment to ensure the normal execution of the sequence.

[0012] Compared with the existing technology, the utility model has the following significant features and positive effects: the utility model realizes the automatic sequential operation of a single high-voltage inlet and outlet cabinet, and automatically executes through an internal fixed execution program, which solves the cumbersome process of manual vote counting and background remote vote counting, and is more economical, simple and efficient; through the configured live display, confirmation position sensor, and sequential control protector, data is uploaded to the sequential control protector in real time, and no human or background judgment is required in the middle. If the conditions are not in place and the signal is not uploaded, the program automatically stops and returns to the initial state, exits the fault state at the first time, and minimizes the probability of accidents; at the same time, the sequential control protector can realize local button control and local sequential control. The utility model solves the cumbersome problem of manual switching operation and background manual remote control step-by-step switching operation, and has the characteristics of electrical alarm indication and intelligence, simple operation, reduced operating costs, and labor saving, ensuring the safety and reliability of power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 Figure 1 sectional view of .

[0015] Figure 3 This is an electrical principle block diagram of the utility model.

[0016] In the figure: 1. Circuit breaker electric chassis, 2. Electrically operated earthing switch, 3. Power-on status display, 4. Confirmation position sensor, 5. Status receiving device, 6. Sequence control protector. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below with reference to the accompanying drawings and embodiments:

[0018] A new type of intelligent high-voltage cabinet sequential control system, referring to Figure 1 , Figure 2 , Figure 3 , including a 12kV high-voltage switchgear electric chassis, a grounding switch with remote control electric operation, a live state indicator 3, a confirmation position sensor 4, a state receiving device 5, and a sequential control protector 6, wherein:

[0019] The 12kV high-voltage switch cabinet electric chassis vehicle is a conventional KYN28 cabinet circuit breaker chassis vehicle with a motor mechanism. In this embodiment, a rotating motor is installed on the rotating spindle of the circuit breaker chassis vehicle to form a circuit breaker electric chassis vehicle 1 with a chassis vehicle control circuit, so as to realize electric propulsion and exit of the circuit breaker, and is equipped with a controller or a comprehensive protector for remote control;

[0020] The earthing switch with remote control electric operation is a conventional JN15-12 earthing switch provided with an electric mechanism. In this embodiment, a rotating motor is installed on the main rotating shaft of the earthing knife to form an electric-operated earthing switch 2 with an electric control circuit of the earthing knife, so as to realize the electric operation of closing and opening of the earthing knife, and a controller or a comprehensive protector is provided to enable remote control;

[0021] The live state indicator 3 is a display for monitoring the live high voltage part, which can monitor high voltage such as 10kv, and transmit the high voltage signal to the live display through the 10kV high voltage sensor, and the corresponding indicator light on the display is lit, and the switch output function is configured, which can provide remote monitoring and status judgment;

[0022] The confirmation position sensor 4 includes a circuit breaker stroke position sensor and a ground knife opening and closing position sensor, which are respectively installed on the side wall of the circuit breaker chamber and the closing and opening rotating main shaft, and are used to monitor the circuit breaker stroke position of the 12kV high-voltage switch cabinet electric chassis vehicle and the ground knife opening and closing position of the JN15-12 grounding switch. When the circuit breaker trolley moves to the test position and the working position, the circuit breaker stroke position sensor senses the relevant position and can send a corresponding state quantity to the state receiving device. When the ground knife is in place for closing or opening, the ground knife opening and closing position sensor senses the relevant position and can send a corresponding state quantity to the state receiving device 5.

[0023] The state receiving device 5 is used to receive the position signal transmitted from the confirmation position sensor 4. There is a corresponding ground indicator light on the panel of the state receiving device. When the position is in place, the indicator light lights up. At the same time, the device has a switch output function and a communication transmission function, and can provide remote monitoring and state judgment. In this embodiment, there are two state receiving devices 5, namely a first state receiving device and a second state receiving device, which are respectively installed next to the grounding knife in the instrument room and the cable room, wherein the first state receiving device is used to receive the position signal of the electric chassis vehicle, and the second state receiving device is used to receive the position signal of the electrically operated grounding switch.

[0024] The sequential control protector 6 is installed on the instrument door. It is a controller for comprehensively controlling the sequential execution of the circuit breaker electric chassis 1 and the electric grounding switch 2 of the electric chassis of the KYN28 cabinet. It also has protection functions such as overcurrent of the high-voltage cabinet. It has a built-in sequential control logic program and is capable of receiving remote control commands. It starts the internal sequential control logic program through a remotely issued start command, sends a running command to the circuit breaker electric chassis 1 and the electric grounding switch 2, executes sequential operations, and uploads the position signal through the confirmation position sensor 4 and the status receiving device 5 for judgment to ensure that the sequential execution is carried out normally.

[0025] When using the utility model, the power transmission process:

[0026] 1. First, monitor the status of the high-voltage cabinet. The circuit breaker electric chassis 1 is in the test position, the vacuum circuit breaker is in the open position, and the electrically operated grounding switch 2 is in the closed position. After the positions are met, the sequence control protector 6 first issues an opening command for the electrically operated grounding knife, and the electric grounding knife starts to perform the opening operation. After the opening is in place, the grounding switch of the electric grounding knife confirms that the position sensor 4 detects the opening position information and sends a status signal to the status receiving device 5. The status receiving device 5 transmits the signal to the sequence control protector 6 in the form of a dry contact. After receiving the in-place signal, the sequence control protector 6 automatically issues an instruction to swing in the circuit breaker electric chassis 1;

[0027] 2. The sequence control protector 6 issues a swing-in instruction for the circuit breaker electric chassis 1, and the circuit breaker electric chassis 1 starts to swing into the cabinet automatically until it reaches the working position in the cabinet. If any fault occurs during this period, it automatically exits the swing-in work and returns to the initial state. After reaching the working position, the confirmation position sensor 4 of the circuit breaker electric chassis 1 monitors the working position information and sends a status signal to the status receiving device 5. The status receiving device 5 transmits the signal to the sequence control protector 6 in the form of dry contacts. After receiving the arrival signal, the sequence control protector 6 automatically issues a vacuum circuit breaker closing instruction;

[0028] 3. The sequence control protector 6 issues a closing command for the vacuum circuit breaker, and the vacuum circuit breaker automatically starts the closing operation. After the closing is completed, the high voltage electricity passes through the vacuum circuit breaker normally, and the high voltage switch cabinet outlet side carries high voltage electricity. The live state display 3 installed on the outlet side of the high voltage cabinet detects the high voltage electricity, and the high voltage live indicator light of the live state display 3 lights up. At the same time, the built-in switch contact acts and feeds back the state to the sequence control protector 6. After receiving the feedback signal, the sequence control protector 6 ends the program, and the high voltage cabinet is powered on.

[0029] Power off process:

[0030] 1. First, monitor the status of the high-voltage cabinet to see that the circuit breaker electric chassis 1 is in the working position, the vacuum circuit breaker is in the closing position, and the electrically operated grounding switch 2 is in the opening position. After all the positions are met, the sequence control protector 6 first issues a vacuum circuit breaker opening command, and the vacuum circuit breaker starts to automatically perform the opening operation. After the opening is completed, there is no high voltage electricity on the outgoing side of the high-voltage switch cabinet. The live status display 3 installed on the outgoing side of the high-voltage cabinet detects that there is no high voltage electricity, and the high-voltage live indicator light of the live status display 3 goes out. At the same time, the internal switch contact acts and feeds back the status to the sequence control protector 6. The sequence control protector 6 receives the status feedback and issues a shake-out command for the circuit breaker electric chassis 1.

[0031] 2. The sequence control protector 6 issues a swing-out instruction for the circuit breaker electric chassis 1, and the circuit breaker electric chassis 1 starts to swing out of the cabinet automatically until it reaches the test position in the cabinet. If any fault occurs during this period, the program execution is stopped. After reaching the test position, the confirmation position sensor 4 of the circuit breaker electric chassis 1 monitors the test position information and sends a status signal to the status receiving device 5. The status receiving device 5 transmits the signal to the sequence control protector 6 in the form of dry contacts. After receiving the arrival signal, the sequence control protector 6 automatically issues a grounding switch closing instruction;

[0032] 3. The sequence control protector 6 issues a closing command for the electrically operated earthing knife, and the electrically operated earthing switch 2 electric earthing knife starts to perform the closing operation. After the closing is in place, the earthing switch confirmation position sensor 4 of the electric earthing knife detects the closing position information and sends a status signal to the status receiving device 5. The status receiving device 5 transmits the signal to the sequence control protector 6 in the form of a dry contact. After the sequence control protector 6 receives the in-place signal, it ends the program and completes the power-off operation.

[0033] Combining the above processes, the power supply and switching work in the distribution room is completed.

Claims

1. A new type of intelligent high-voltage cabinet sequential control system, characterized by It includes 12kV high-voltage switchgear electric chassis, earthing switch with remote control electric operation, live status indicator, confirmation position sensor, status receiving device, sequence control integrated protector, among which: The 12kV high-voltage switch cabinet electric chassis vehicle is a conventional KYN28 cabinet circuit breaker chassis vehicle with a motor mechanism arranged therein to form a chassis vehicle control circuit; The earthing switch with remote control electric operation is a conventional JN15-12 earthing switch provided with an electric mechanism to form an electric control circuit of the earthing switch; The live status indicator is a display for monitoring the live high voltage part, which can monitor 10kv high voltage electricity. The high voltage signal is transmitted to the live display through the 10kV high voltage sensor, and the corresponding indicator light is lit on the display. At the same time, the switch output function is configured, which can provide remote monitoring and status judgment. The confirmation position sensor is used to monitor the circuit breaker stroke position and the ground switch opening and closing position, and is installed on the side wall of the circuit breaker chamber and the closing and opening rotation main shaft. When the circuit breaker trolley moves to the test position and the working position, the trolley position sensor senses the relevant position and can send a corresponding state quantity to the state receiving device. When the ground switch is in place for closing or opening, the ground switch position sensor senses the relevant position and can send a corresponding state quantity to the state receiving device. The state receiving device is used to receive the position signal transmitted from the confirmation position sensor. The panel of the state receiving device has a corresponding indicator light. When the position is in place, the indicator light is on. At the same time, the device has a switch output function and a communication transmission function, and can provide remote monitoring and state judgment. The sequential control protector is a controller used to comprehensively control the sequential execution of the electric chassis and electric ground knife of the KYN28 cabinet. It also has the overcurrent, quick-break and overload protection functions of the high-voltage cabinet. It has a built-in sequential control logic program and is capable of receiving remote control commands. Through the start command issued remotely, it starts the internal sequential control logic program, issues a running command to the electric chassis and the electric ground knife, executes sequential operations, and uploads the position signal through the confirmation position sensor and the status receiving device for judgment to ensure the normal execution of the sequence.

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