Switch cabinet integrated simulation discharge method

Abstract

The invention discloses a switch cabinet integrated simulation discharge method. According to the method, a numerical control voltage regulation power supply, a transformer, an electrode controller, a coupling capacitor, a detection impedor and a plurality of discharge model assemblies are arranged in an existing switch cabinet, and the size and type of simulation discharge of the switch cabinet are integrally controlled through a PC end. The discharge model assemblies are fixed in the switch cabinet through a support, the discharge models are fixed to the support through stepping motors, and the multiple discharge model assemblies are arranged relative to bus copper bars in the switch cabinet. The numerical control voltage-regulating power supply is connected with a low-voltage side input end of the transformer, a high-voltage side output end of the transformer is connected with a lower cabinet bus of the switch cabinet, one end of the coupling capacitor is connected with the high-voltage side output end of the transformer, the other end of the coupling capacitor is connected with the partial discharge detector through the detection impedance, and the partial discharge detector is connected with the PC end. And the PC end controls actions such as boost, buck, discharge model switching and the like. According to the invention, the efficiency of the simulation discharge test is improved, the test risk is reduced, and the test accuracy is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power equipment, and particularly relates to an integrated simulation discharge method for switchgear. Background Art

[0002] High-voltage switchgear is an important device in the power system for participating in power distribution, circuit control, power measurement and monitoring. It has a large usage scale, wide geographical area and complex operating environment, and is a device with a high incidence of insulation accidents in the distribution network. During the operation of high-voltage switchgear, insulation deterioration is easily caused due to insulation aging, moisture, pollution or poor connection of electrical joints, which is likely to lead to discharge faults. Partial discharge detection is the key means to discover insulation defects in switchgear.

[0003] The existing simulation of discharge faults in switchgear equipment mainly utilizes the defect problems of the existing structure of the retired switchgear, or artificially damages to create insulation defects, or hangs metal copper wires on the busbar copper bars of the new switchgear equipment, etc. for simulating discharge faults. In these existing fault simulation methods, discharge control, voltage control and partial discharge detection are all realized manually. The discharge type, discharge magnitude and generation and disappearance of discharge are all uncontrollable, and the types of simulated discharge are single. The existing discharge simulation methods are cumbersome to operate, have a large workload, poor linkage, inaccurate control and inaccurate data, which greatly affect the convenience and accuracy of switchgear discharge simulation. Summary of the Invention

[0004] The purpose of the present invention is to provide an integrated simulation discharge method for switchgear in view of the deficiencies of the prior art.

[0005] The method of the present invention is to set a numerically controlled voltage regulating power supply, a transformer, an electrode controller, a coupling capacitor, a detection impedance and a plurality of discharge model components in the existing switchgear, and integrate and control the magnitude and type of simulated discharge of the switchgear through a PC terminal.

[0006] The numerically controlled voltage regulating power supply is connected to the low-voltage side input terminal of the transformer, and the numerically controlled voltage regulating power supply is controlled by an external PC terminal. If a three-phase transformer is used, the three-phase output of the high-voltage side of the transformer is correspondingly connected to the three-phase busbar copper bars of the lower cabinet of the switchgear; if a single-phase transformer is used, the single-phase output terminal of the high-voltage side of the transformer is connected to one of the phase busbar copper bars of the lower cabinet of the switchgear, and the three-phase busbar copper bars of the upper cabinet of the switchgear are short-circuited.

[0007] One end of the coupling capacitor is connected to the high-voltage side output terminal of the transformer, and the other end of the coupling capacitor is connected to the partial discharge detector through the detection impedance. The partial discharge detector real-time detects the data of the discharge type and discharge magnitude, and the partial discharge detector is connected to an external PC terminal.

[0008] The specific structure of the discharge model component is as follows: It includes a bracket, on which multiple discharge models are arranged. The multiple discharge models are one or more of a tip discharge model, a floating discharge model, an air gap discharge model, and a surface discharge model. The discharge models are fixed to the bracket through a stepper motor. The multiple discharge model components are arranged relative to the busbar copper bars in the switchgear (the upper cabinet three-phase busbar copper bars and / or the lower cabinet three-phase busbar copper bars and / or the middle cabinet three-phase busbar copper bars of the switchgear). The head of the discharge model is arranged corresponding to the busbar copper bars, and the tail is connected to the rear panel of the switchgear for grounding. The electrode controller is connected to the stepper motor to control the horizontal or vertical movement of the discharge model. The electrode controller is connected to an external PC.

[0009] The centralized control software is installed inside the PC host computer of the PC side. The PC side is signal-connected to the numerically controlled voltage regulating power supply. The numerically controlled voltage regulating power supply is connected to the low-voltage side of the transformer. The PC host computer of the PC side controls the switch of the numerically controlled voltage regulating power supply and controls the boost and buck amplitude of the transformer through the numerically controlled voltage regulating power supply; the PC side is signal-connected to the electrode controller to control the movement of the discharge model through the electrode controller; the PC side is signal-connected to the partial discharge detector to process the partial discharge signals received by the partial discharge detector; the PC host computer of the PC side issues control instructions to the numerically controlled voltage regulating power supply and the electrode controller, and the numerically controlled voltage regulating power supply and the electrode controller feed back the execution data to the PC host computer of the PC side; the electrode controller respectively controls the rotation direction of the stepper motors connected to each discharge model and respectively controls the opening and closing switching of each discharge model.

[0010] The method of the present invention integrates the control of the rise and fall of the test voltage, the start, stop, and switching of the faulty discharge model, and the partial discharge detection, making the discharge size, discharge type, generation, and disappearance of the discharge during the discharge simulation process of the switchgear controllable, realizing the simulation of multiple discharge types, reducing the workload, reducing human errors, and improving the convenience and accuracy of the discharge simulation of the switchgear. Description of the Drawings

[0011] Figure 1 It is the overall schematic diagram of the present invention; Figure 2 It is the schematic diagram of the structure of the discharge model component of the present invention; Figure 3 It is the schematic diagram of the discharge model control device; Figure 4 It is the schematic diagram of the tip discharge model structure in the present invention; Figure 5 It is the schematic diagram of the floating discharge model structure in the present invention; Figure 6 It is the schematic diagram of the air gap discharge model structure in the present invention; Figure 7 It is the schematic diagram of the surface discharge model structure in the present invention; Figure 8 It is the schematic diagram of the control system of the present invention. Detailed implementation mode

[0012] As Figure 1 shown, an integrated analog discharge method for switchgear is to set a numerical control voltage regulating power supply 1, a transformer 2, an electrode controller 3, a coupling capacitor, a detection impedance (not shown in the figure), and multiple discharge model components 4 in the existing switchgear, and integrate and control the size and type of the analog discharge of the switchgear through the PC side.

[0013] The numerical control voltage regulating power supply 1 is connected to the low-voltage side input end of the transformer 2, and the numerical control voltage regulating power supply is controlled by an external PC side (not shown in the figure). In this embodiment, a single-phase transformer is used, and the single-phase output end of the high-voltage side of the transformer 2 is connected to one-phase busbar copper row 51 of the lower cabinet of the switchgear, and the three-phase busbar copper rows 52 of the upper cabinet of the switchgear are short-circuited through a conductor 6. If a three-phase transformer is used, the three-phase outputs of the high-voltage side of the transformer are correspondingly connected to the three-phase busbar copper rows of the lower cabinet of the switchgear.

[0014] One end of the coupling capacitor is connected to the high-voltage side output end of the transformer 2, and the other end of the coupling capacitor is connected to a partial discharge detector (not shown in the figure) through a detection impedance. The partial discharge detector detects the discharge type and discharge size data in real time, and the partial discharge detector is connected to an external PC side.

[0015] As Figure 2 shown, the specific structure of the discharge model component 4 is: including a bracket 41, multiple discharge models 42 are arranged in parallel on the bracket, the discharge model 42 is fixed to the bracket 41 through a stepping motor 43, and the bracket 41 is fixed in the switchgear. The multiple discharge models are one or more of a tip discharge model, a floating discharge model, an air gap discharge model, and a surface discharge model. One or more discharge models can be set on one bracket, and one or more types of discharge models can also be set.

[0016] As Figure 3 shown, the lead screw 44 of the stepping motor 43 is threadedly connected to the sliding member 45, the sliding member 45 is movably connected to the guide rod 46, the sliding member 45 can slide up and down along the guide rod 46, and the sliding member 45 is connected to the discharge model 42 through a connecting rod 47 to control the linear movement of the discharge model 42.

[0017] Multiple discharge model components 4 are arranged relative to the busbar copper bars in the switchgear cabinet (arranged for the upper cabinet three-phase busbar copper bars and / or the lower cabinet three-phase busbar copper bars and / or the middle cabinet three-phase busbar copper bars of the switchgear cabinet). In this embodiment, the discharge model components 4 arranged in the upper part of the cabinet body correspond to the positions of the conductors 6 connected to the upper cabinet three-phase busbar copper bars 52, and the heads of each discharge model 42 are arranged corresponding to the copper posts on the conductors 6; the discharge model components 4 arranged in the middle part of the cabinet body correspond to the positions of the middle cabinet three-phase busbar copper bars 53, and the heads of each discharge model 42 are arranged corresponding to the copper posts on the middle cabinet three-phase busbar copper bars 53; the discharge model components 4 arranged in the lower part of the cabinet body correspond to the positions of the lower cabinet three-phase busbar copper bars 51, and the heads of each discharge model 42 are arranged corresponding to the copper posts on the lower cabinet three-phase busbar copper bars 51. The tails of all the discharge models 42 are connected to the rear plate of the switchgear cabinet for grounding. All the stepper motors 43 are connected to the electrode controller 3, and the electrode controller is connected to the external PC terminal. The PC terminal controls each stepper motor 43 through the electrode controller 3, and further controls the horizontal or vertical movement of each discharge model 42.

[0018] The specific structures of the four discharge models are as follows: As Figure 4 shown, the tip discharge model includes a front cylinder 411 and a rear cylinder 412 fixedly connected. The front cylinder 411 and the rear cylinder 412 made of insulating materials enclose a discharge cavity, and a metal needle 413 is arranged in the discharge cavity. A protrusion is provided on the end face of the front cylinder 411, and a first conductive rod 414 passes through the protrusion and is fixedly arranged on the end face of the front cylinder 411. One end of the first conductive rod 414 is fixedly connected and conducted with a metal sheet 415 in the discharge cavity, and the other end extends out of the protrusion on the end face of the front cylinder 411. Part of the first conductive rod 414 and one end of the first metal adjusting member 417 are arranged in the first metal sleeve 416. The first metal sleeve 416 is fixedly connected to the protrusion on the end face of the front cylinder. A first spring 418 is arranged between the first metal adjusting member 417 and the first conductive rod 414. The first metal sleeve 416, the first metal adjusting member 417 and the first conductive rod 414 are coaxially arranged. During the up and down movement of the first metal adjusting member 417 along this axis, it always maintains a conductive state with the first conductive rod 414. A first metal mounting seat 419 is fixedly arranged on the bottom surface of the rear cylinder 412. The first metal mounting seat 419 is connected to one end of the connecting rod 47, and the root of the metal needle 413 is fixedly connected and conducted with the first metal mounting seat 419, and the tip is directed towards the metal sheet 415. During operation, when the tip discharge model is pushed forward (or downward) as a whole and the first metal adjusting member 217 contacts the copper post on the busbar copper bar, tip discharge occurs. During the contact process between the tip discharge model and the copper post, pressure relief is carried out through the first spring 218 to protect the model.

[0019] As Figure 5As shown, the floating discharge model includes an insulating cylinder 421 and an insulating base 422. The insulating base 422 is fixedly connected to the open end of the insulating cylinder 421. The insulating cylinder 421 and the insulating base 422 enclose a discharge cavity, and a metal simulation part 423 is arranged in the discharge cavity. The metal simulation part 423 is fixedly arranged on the insulating base 422. A protrusion is arranged on the end face of the insulating cylinder 421, and a second conductive rod 424 passes through the protrusion. One end of the second conductive rod 424 extends into the discharge cavity, and the other end extends out of the protrusion on the end face of the insulating cylinder 421. The metal simulation part 423 corresponds to the position of the second conductive rod 424, and there is a gap between the metal simulation part 423 and the second conductive rod 424. One end of a part of the second conductive rod 424 and a second metal adjusting part 425 is arranged in a second metal sleeve 426. The second metal sleeve 426 is fixedly connected to the protrusion on the end face of the insulating cylinder. A second spring 427 is arranged between the second metal adjusting part 425 and the second conductive rod 424. The second metal sleeve 426, the second metal adjusting part 425 and the second conductive rod 424 are coaxially arranged. During the up and down movement of the second metal adjusting part 425 along this axis, it always remains in a conductive state with the second conductive rod 424. A second metal mounting seat 428 is fixedly arranged on the insulating base 422. The second metal mounting seat 428 is connected to one end of a connecting rod 47. The second metal mounting seat 428 and the metal simulation part 423 are insulated through the insulating base 422. During operation, when the floating discharge model is pushed to move forward (or downward) as a whole and the second metal adjusting part 425 contacts the copper column on the busbar copper row, floating discharge occurs. During the contact process between the floating discharge model and the copper column, pressure relief is carried out through the second spring 427 to protect the model.

[0020] As Figure 6As shown, the air gap discharge model includes a first insulating block 431, a first metal rod 432, and a third conductive rod 433. The first insulating block 431 is made of solid polyester material with bubbles dispersed inside. The first metal rod 432 and the third conductive rod 433 extend into the first insulating block 431 from both sides of the first insulating block 431. The heads of the first metal rod 432 and the third conductive rod 433 are arranged opposite to each other and are insulated by the first insulating block 431. One end of a part of the third conductive rod 433 and a third metal adjusting part 434 is arranged inside a third metal sleeve 435. The third metal sleeve 435 is fixedly connected to the first insulating block 431. A third spring 436 is arranged between the third metal adjusting part 434 and the third conductive rod 433. The third metal sleeve 435, the third metal adjusting part 434, and the third conductive rod 433 are coaxially arranged. During the up and down movement of the third metal adjusting part 434 along this axis, it always remains in a conducting state with the third conductive rod 433. A third metal mounting seat 437 is fixedly arranged on the first insulating block 431, is fixedly connected to and conducts with the first metal rod 432, and is connected to one end of a connecting rod 47. During operation, when the air gap discharge model is pushed to move forward (or downward) as a whole, when the third metal adjusting part 434 contacts the copper post on the busbar copper row, air gap discharge occurs. During the contact process between the air gap discharge model and the copper post, pressure relief is carried out through the third spring 436 to protect the model.

[0021] As Figure 7 shown, the surface discharge model includes a second insulating block 441, a second metal rod 442, and a fourth conductive rod 443. The second insulating block 441 is made of solid polyester material. Two insulating plates 448 are arranged on the second insulating block 441. The two insulating plates 448 are arranged in parallel, and the plane is perpendicular to the central axis of the surface discharge model. The second metal rod 442 and the fourth conductive rod 443 extend into the second insulating block 441 from both sides of the second insulating block 441. The heads of the second metal rod 442 and the fourth conductive rod 443 are arranged opposite to each other and are insulated by the second insulating block 441. One end of a part of the fourth conductive rod 443 and a fourth metal adjusting part 444 is arranged inside a fourth metal sleeve 445. The fourth metal sleeve 445 is fixedly connected to the second insulating block 441. A fourth spring 446 is arranged between the fourth metal adjusting part 444 and the fourth conductive rod 443. The fourth metal sleeve 445, the fourth metal adjusting part 444, and the fourth conductive rod 443 are coaxially arranged. During the up and down movement of the fourth metal adjusting part 444 along this axis, it always remains in a conducting state with the fourth conductive rod 443. A fourth metal mounting seat 447 is fixedly arranged on the second insulating block 441, is fixedly connected to and conducts with the second metal rod 442, and is connected to one end of a connecting rod 47. During operation, when the surface discharge model is pushed to move forward (or downward) as a whole, when the fourth metal adjusting part 444 contacts the copper post on the busbar copper row, surface discharge occurs. During the contact process between the surface discharge model and the copper post, pressure relief is carried out through the fourth spring 446 to protect the model.

[0022] As shown Figure 8 in the figure, a centralized control software is installed inside the host computer on the PC side. The PC side is signal-connected to the numerically controlled voltage regulating power supply to control the switch, boosting, and bucking of the numerically controlled voltage regulating power supply. The PC side is signal-connected to the electrode controller to control the movement of the discharge model through the electrode controller. The PC side is signal-connected to the partial discharge detector to process the partial discharge signals received by the partial discharge detector. The centralized control software of the host computer on the PC side has parameter combinations for setting and input including: 8 parameter combinations of "manual closing", "manual opening", "boosting", "bucking", "voltage regulating range", "target voltage", "partial discharge measurement", and "video monitoring". The host computer on the PC side is connected to the router through an optical fiber. The first output end of the router is connected to the partial discharge detector through a network cable. The second output end of the router is connected to the power supply motor control board through a network cable. The first end of the power supply motor control board is wirelessly connected to the numerically controlled voltage regulating power supply, and the second end is connected to the electrode controller through a network cable. The external PC side is the host computer, and the power supply motor control board is the slave computer. The power supply motor control board receives the control instructions sent by the host computer on the PC side, transmits them to the numerically controlled voltage regulating power supply and the electrode controller, and at the same time feeds back the execution data to the host computer on the PC side. The electrode controller controls the rotation direction of the stepping motor connected to each discharge model, thereby respectively controlling the forward / backward or up / down switching of each discharge model. The numerically controlled voltage regulating power supply is connected to the low-voltage side of the transformer. The host computer on the PC side controls the boosting and bucking amplitudes of the transformer through the numerically controlled voltage regulating power supply, and the voltage regulating step can be arbitrarily selected from 1 - 10V.

[0023] Integrating the numerically controlled voltage regulating power supply and the electrode controller into the switch cabinet eliminates the need for repeated wiring during each test. Actions such as boosting / bucking and discharge model switching do not require manual operation each time, and there is no need for human destruction. Only by selecting the action instructions for the partial discharge test on the host computer on the PC side, the integrated control system automatically completes actions such as boosting / bucking and discharge model switching, improving the convenience and efficiency of the internal simulated discharge test of the switch cabinet, reducing the test risks caused by manual operation errors, and increasing the accuracy of the test.

[0024] The simulated discharge detection method of the internal discharge simulation device of this switch cabinet is as follows: Step (1) Discharge model selection: Select the "manual closing" parameter of the discharge model of the type to be measured on the centralized control platform of the host computer on the PC side. The host computer on the PC side sends a digital signal of the specified discharge model movement instruction to the router. The power supply motor control board receives the digital signal of the motor movement instruction forwarded by the router and converts it into a PWM signal for output to the electrode controller. The electrode controller executes the PWM signal to drive the corresponding motor screw to rotate clockwise, driving the discharge model to close the high-voltage bus.

[0025] Step (2) Boost operation: First, determine the discharge inception voltage generated by partial discharge. Enter any step of 1V - 10V in the "Voltage Regulation Range" parameter on the PC-side host computer centralized control platform. Select the "Boost" parameter multiple times. The PC-side host computer sends out a step-by-step boost command signal router for the entered step. The power motor control board receives the forwarded digital command signal of step-by-step boost from the router and converts it into a PWM signal to send to the numerical control voltage regulation power supply. The numerical control voltage regulation power supply precisely and slowly adjusts the boost value according to the received PWM signal. When a discharge signal first appears in the "Partial Discharge Measurement" parameter interface on the PC-side host computer, the currently displayed voltage value is the discharge inception voltage. After determining the discharge inception voltage, during each subsequent test of the same discharge model, enter the determined inception voltage in the "Target Voltage" parameter on the PC-side host computer centralized control platform, and then select the "Boost" parameter. The PC-side host computer sends out a command signal to boost to the "Target Voltage". The numerical control voltage regulation power supply automatically boosts to the discharge inception voltage, improving the efficiency and boost accuracy.

[0026] Step (3) Automatic detection of partial discharge phase amplitude in switchgear: Enter any step of 1V - 10V in the "Voltage Regulation Range" parameter and the inception voltage in the "Target Voltage" parameter on the PC-side host computer centralized control platform. Then select the "Automatic Partial Discharge Measurement" parameter. The PC-side host computer simultaneously sends out a boost command signal to the numerical control boost power supply and a partial discharge acquisition signal to the partial discharge detector. After the numerical control boost power supply boosts to the inception voltage, it continues to boost at the selected step on the basis of the inception voltage, and maintains each voltage amplitude for 10s. At the same time, the partial discharge detector collects the discharge measurement data corresponding to each voltage level and feeds it back to the PC-side host computer. When the PC-side host computer centralized control platform detects that during a 10s time period at a certain current voltage level, discharge signals will appear within a fixed phase range of each 20ms AC voltage cycle, it sends out a stop boost command signal to the numerical control boost power supply. The collected discharge measurement data displayed on the PC-side host computer centralized control platform at this time is the stable discharge pattern data for judging the discharge type.

[0027] Step (4) Voltage reduction operation: First, determine the discharge extinction voltage inside the switchgear. On the PC-side host computer centralized control platform, input any step value from 1V to 10V for the "voltage regulation range" parameter, and select the "voltage reduction" parameter multiple times. The PC-side host computer sends a step-by-step voltage reduction command signal to the router. The power supply motor control board receives the digital command signal of the step-by-step voltage reduction forwarded by the router and converts it into a PWM signal to be sent to the numerical control voltage regulator power supply. The numerical control voltage regulator power supply executes the received PWM signal to precisely and slowly adjust the voltage reduction value. When the "partial discharge measurement" parameter interface on the PC-side host computer first loses the discharge signal, the currently displayed voltage value is the discharge extinction voltage. After determining the discharge extinction voltage, during each subsequent test of the same discharge model, input the determined extinction voltage for the "target voltage" parameter on the PC-side host computer centralized control platform, and then select the "voltage reduction" parameter. The PC-side host computer sends a command signal to raise and lower the voltage to the "target voltage". The numerical control voltage regulator power supply automatically reduces the voltage to the discharge extinction voltage, improving the efficiency and the accuracy of voltage increase.

[0028] Step (5) Disconnect the current measured discharge model test and switch to the next different type of discharge model; after reducing the voltage to 0V, select the "manual disconnection" parameter for testing the current measured discharge model on the PC-side host computer centralized control platform. The PC-side host computer sends a specified discharge model movement command signal to the router. The power supply motor control board receives the digital signal of the motor movement command forwarded by the router and converts it into a PWM signal to be output to the electrode controller. The electrode controller executes the PWM signal to drive the motor lead screw to rotate counterclockwise, driving the discharge model to separate from the high-voltage bus. Select the next test model on the PC-side host computer centralized control platform and repeat the operation until the tests of all discharge models are completed.

Claims

1. An integrated analog discharge method for a switchgear, characterized in that: This method is to set a numerically controlled voltage regulating power supply, a transformer, an electrode controller, a coupling capacitor, a detection impedance and multiple discharge model components in the existing switchgear cabinet, and externally control the size and type of the simulated discharge of the switchgear cabinet through a PC terminal integrated control. The numerically controlled voltage regulating power supply is connected to the low-voltage side input terminal of the transformer, and the numerically controlled voltage regulating power supply is controlled through an external PC terminal; the high-voltage side output terminal of the transformer is connected to the busbar of the lower cabinet of the switchgear cabinet, one end of the coupling capacitor is connected to the high-voltage side output terminal of the transformer, and the other end of the coupling capacitor is connected to the partial discharge detector through the detection impedance. The partial discharge detector detects the partial discharge type and discharge size data in real time, and the partial discharge detector is connected to the external PC terminal. The discharge model component includes a bracket, and multiple discharge models are arranged on the bracket. The discharge models are fixedly connected to the bracket through stepping motors; the multiple discharge models are one or more of a tip discharge model, a floating discharge model, a gas gap discharge model, and a surface discharge model. Multiple discharge model components are arranged opposite to the busbar copper row in the switchgear cabinet. The head of the discharge model is arranged corresponding to the busbar copper row, and the tail is connected to the rear panel of the switchgear cabinet and grounded; the electrode controller is connected to the external PC terminal, and the electrode controller is connected to the stepping motor to control the horizontal or vertical movement of the discharge model. The upper computer of the PC terminal is internally installed with centralized control software. The PC terminal is signal-connected to the numerically controlled voltage regulating power supply, and the numerically controlled voltage regulating power supply is connected to the low-voltage side of the transformer. The upper computer of the PC terminal controls the switch of the numerically controlled voltage regulating power supply, and controls the boosting and bucking amplitudes of the transformer through the numerically controlled voltage regulating power supply; the PC terminal is signal-connected to the electrode controller and controls the movement of the discharge model through the electrode controller; the PC terminal is signal-connected to the partial discharge detector and processes the partial discharge signals received by the partial discharge detector; the upper computer of the PC terminal issues control instructions to the numerically controlled voltage regulating power supply and the electrode controller, and the numerically controlled voltage regulating power supply and the electrode controller feedback the execution data to the upper computer of the PC terminal; the electrode controller respectively controls the rotation directions of the stepping motors connected to each discharge model and respectively controls the opening and closing switching of each discharge model.

2. The integrated analog discharge method for a switch cabinet according to claim 1, characterized in that: If a three-phase transformer is adopted, the three-phase output terminals of the high-voltage side of the transformer are correspondingly connected to the three-phase busbar copper rows of the lower cabinet of the switchgear cabinet; if a single-phase transformer is adopted, the single-phase output terminal of the high-voltage side of the transformer is connected to one of the phase busbar copper rows of the lower cabinet of the switchgear cabinet, and the three-phase busbar copper rows of the upper cabinet of the switchgear cabinet are short-circuited.

3. The integrated analog discharge method for switchgear according to claim 1, characterized in that: The multiple discharge model components are arranged corresponding to the three-phase busbar copper rows of the upper cabinet and / or the three-phase busbar copper rows of the lower cabinet and / or the three-phase busbar copper rows of the middle cabinet of the switchgear cabinet.

4. The integrated analog discharge method for a switchgear cabinet according to claim 1, wherein: The upper computer of the PC terminal controls the boosting and bucking amplitudes of the transformer, and the voltage regulation step is arbitrarily selected from 1-10V.

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