Grounding detection system for silicon rod of polycrystalline silicon reduction furnace

Abstract

The utility model discloses a grounding detection system for a silicon rod of a polycrystalline silicon reduction furnace, which belongs to the technical field of polycrystalline silicon production and comprises an insulation detector connected with a main circuit through a first high-voltage vacuum relay and a second high-voltage vacuum relay and connected with an optical fiber transceiver through a power adjusting cabinet PLC. The optical fiber transceiver is connected with the upper computer, the touch screen HMI and the TPC controller, the TPC controller is connected with the high-voltage coupler, the power adjusting cabinet PLC controls opening and closing of a vacuum contactor in the main circuit, and the TPC controller and the high-voltage coupler control opening and closing of a first high-voltage vacuum relay, a second high-voltage vacuum relay and a high-voltage vacuum relay in the main circuit. The insulation detector is used for detecting the electrode resistance value, the touch screen HMI or the upper computer operates the electrode resistance value test, and the touch screen HMI displays test data. The upper computer and the touch screen HMI network communication control field power adjusting cabinet PLC control insulation detector is used for testing the electrode resistance value and the electrode insulation.

Description

Technical Field

[0001] The utility model belongs to the technical field of polysilicon production, and in particular relates to a grounding detection system for silicon rods in a polysilicon reduction furnace. Background Art

[0002] The large-scale development and application of photovoltaic power generation has driven the rapid development of the entire photovoltaic industry chain. In particular, the production scale of multi-grade silicon, a photovoltaic raw material, has been increasing in recent years. This large-scale multi-grade silicon production places higher demands on the core reduction furnace and its supporting power supply equipment.

[0003] During operation, the reduction furnace's electrodes also require insulation testing. The traditional method for testing electrode insulation is for technicians or electricians to manually perform a shaking test after the reduction furnace is shut down. This manual operation poses safety risks, wastes significant manpower, and is time-consuming, failing to meet the requirements of existing automated control systems. Manually managing the shaking test and the accuracy of the electrode insulation is highly uncertain. Utility Model Content

[0004] The purpose of the utility model is to solve the problems of the prior art and provide a grounding detection system for silicon rods in a polysilicon reduction furnace. The insulation tester is controlled by the power control cabinet PLC on site through the network communication between the host computer and the touch screen HMI to test the electrode resistance and electrode insulation. The test data can be uploaded to the host computer and saved.

[0005] The utility model is achieved through the following technical solutions:

[0006] A grounding detection system for silicon rods in a polysilicon reduction furnace includes an insulation tester, which is connected to a main circuit via a first high-voltage vacuum relay and a second high-voltage vacuum relay. The insulation tester is connected to a fiber optic transceiver via a power control cabinet PLC. The fiber optic transceiver is respectively connected to a host computer, a touch screen HMI, and a TPC controller. The TPC controller is connected to a high-voltage coupler. The power control cabinet PLC controls the opening and closing of a vacuum contactor in the main circuit. The TPC controller and the high-voltage coupler control the opening and closing of the first high-voltage vacuum relay, the second high-voltage vacuum relay, and the high-voltage vacuum relay in the main circuit. The insulation tester is used to detect electrode resistance. The touch screen HMI or the host computer operates the electrode resistance test, and the touch screen HMI displays the test data.

[0007] Preferably, the main circuit includes a multi-head transformer and a voltage regulating circuit, and the voltage regulating circuit includes a main voltage regulator, a sub-voltage regulator and a boost module; one end of the main voltage regulator is connected to the tap of the multi-head transformer, one end of the sub-voltage regulator is connected to one end of the main voltage regulator, and the other end of the sub-voltage regulator is connected to the boost module.

[0008] Preferably, the output end of the main voltage regulator is connected to the first bus, and the first output end of the first bus is connected to the load assembly through a first circuit breaker and a third switch connected in parallel; two of the taps of the multi-head transformer are respectively connected to the input end of a voltage regulator to form a sub-voltage regulator connected in parallel with the main voltage regulator, the output end of the sub-voltage regulator is connected to the second bus, the first output end of the second bus is connected to the load assembly through a second switch connected in parallel with the first switch and a fourth high-voltage vacuum relay, the first output end of the boost module is connected to the common end of the second switch and the load assembly, and the load assembly is connected to the second output end of the boost module, the output end of the multi-head transformer, the second output end of the first bus and the second output end of the second bus through the second circuit breaker.

[0009] Preferably, the load assembly includes a first electrode, a first pair of silicon rods, a second third electrode, a second pair of silicon rods, a fourth fifth electrode, a third pair of silicon rods, a sixth seventh electrode, a fourth pair of silicon rods and an eighth electrode connected in sequence.

[0010] Preferably, the fourth high-voltage vacuum relay is connected to one end of the first electrode through the first vacuum relay, the fourth high-voltage vacuum relay is connected to the second and third electrodes between the first silicon rod and the second silicon rod through the fifth high-voltage vacuum relay, the fourth high-voltage vacuum relay is connected to the fourth and fifth electrodes between the second silicon rod and the third silicon rod through the second vacuum relay, the fourth high-voltage vacuum relay is connected to the sixth and seventh electrodes between the third silicon rod and the fourth silicon rod through the sixth high-voltage vacuum relay, and the fourth high-voltage vacuum relay is connected to one end of the eighth electrode through the third vacuum relay.

[0011] Preferably, the load assembly includes a first electrode, a first pair of silicon rods, a second-third electrode, a second pair of silicon rods, a fourth-fifth electrode, a third pair of silicon rods, a sixth-seventh electrode, a fourth pair of silicon rods, an eighth-ninth electrode, a fifth pair of silicon rods, an eleventh electrode, a sixth pair of silicon rods and a twelfth electrode connected in sequence.

[0012] Among them, the fourth high-voltage vacuum relay is connected to one end of the first electrode through the first vacuum relay, and the fourth high-voltage vacuum relay is connected to the second and third electrodes between the first silicon rod and the second silicon rod through the fifth high-voltage vacuum relay; the fourth high-voltage vacuum relay is connected to the fourth and fifth electrodes between the second silicon rod and the third silicon rod through the second vacuum relay, and the fourth high-voltage vacuum relay is connected to the sixth and seventh electrodes between the third silicon rod and the fourth silicon rod through the sixth high-voltage vacuum relay; the fourth high-voltage vacuum relay is connected to the eighth and ninth electrodes between the fourth silicon rod and the fifth silicon rod through the third vacuum relay, and the fourth high-voltage vacuum relay is connected to the eleventh electrode between the fifth silicon rod and the sixth silicon rod through the seventh high-voltage vacuum relay; and the fourth high-voltage vacuum relay is connected to one end of the twelfth electrode through the fourth vacuum relay.

[0013] Preferably, the load assembly includes a first electrode, a first pair of silicon rods, a second-third electrode, a second pair of silicon rods, a forty-fifth electrode, a third pair of silicon rods, a sixty-seventh electrode, a fourth pair of silicon rods, an eighty-ninth electrode, a fifth pair of silicon rods, an eleventh electrode, a sixth pair of silicon rods, a twenty-third electrode, a seventh pair of silicon rods, a fourteenth-fifth electrode, an eighth pair of silicon rods and a sixteenth electrode connected in sequence.

[0014] Preferably, the fourth high-voltage vacuum relay is connected to one end of the first electrode through the first vacuum relay, and is connected to the second and third electrodes between the first silicon rod and the second silicon rod through the fifth high-voltage vacuum relay; the fourth high-voltage vacuum relay is connected to the fourth and fifth electrodes between the second silicon rod and the third silicon rod through the second vacuum relay, and is connected to the sixth and seventh electrodes between the third silicon rod and the fourth silicon rod through the sixth high-voltage vacuum relay; the fourth high-voltage vacuum relay is connected to the eightieth and ninth electrodes between the fourth silicon rod and the fifth silicon rod through the third vacuum relay, and is connected to the eleventh electrode between the fifth silicon rod and the sixth silicon rod through the seventh high-voltage vacuum relay; the fourth high-voltage vacuum relay is connected to the twenty-third electrode between the sixth silicon rod and the seventh silicon rod through the fourth vacuum relay, and is connected to the fourteenth and fifth electrodes between the seventh silicon rod and the eighth silicon rod through the eighth high-voltage vacuum relay; and the fourth high-voltage vacuum relay is connected to one end of the sixteenth electrode through the fifth vacuum relay.

[0015] Preferably, the insulation tester is grounded through a third high-voltage vacuum relay.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] 1. The utility model provides a grounding detection system for silicon rods in a polysilicon reduction furnace. The insulation tester is controlled by the PLC of the power control cabinet on site through the network communication between the host computer and the touch screen HMI to test the electrode resistance and electrode insulation. The test data can be uploaded to the host computer and saved.

[0018] 2. The utility model provides a grounding detection system for silicon rods in a polysilicon reduction furnace. The purpose of this system and method is to solve the problem of detecting the insulation of the chassis electrodes and the resistance of the silicon core in the polysilicon reduction furnace. It no longer requires periodic detection by staff, thus reducing the workload of staff and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the present utility model;

[0020] Figure 2 This is a schematic diagram of the insulation tester and the main circuit in the utility model;

[0021] Figure 3 This is a schematic diagram of the insulation tester and the main circuit in Example 2 of the present utility model;

[0022] Figure 4 This is a schematic diagram of the insulation tester and the main circuit in Example 3 of the present utility model;

[0023] Figure 5 This is a schematic diagram of the insulation tester and the main circuit in Example 4 of the present utility model;

[0024] 100, insulation tester; 200, main circuit; 300, power cabinet PLC; 400, fiber optic transceiver; 500, host computer; 600, touch screen HMI; 700, TPC controller; 800, high-voltage coupler; 210, multi-head transformer; 220, voltage regulation circuit; 221, main voltage regulator; 222, auxiliary voltage regulator; 223, boost module; 224, first busbar; 225, first circuit breaker; 226, third switch; 227, load component; 228, second busbar; 229, first switch; 230 , the second switch; 231, the second circuit breaker; 241, the first high-voltage vacuum relay; 242, the second high-voltage vacuum relay; 243, the third high-voltage vacuum relay; 244, the fourth high-voltage vacuum relay; 245, the fifth high-voltage vacuum relay; 246, the sixth high-voltage vacuum relay; 247, the seventh high-voltage vacuum relay; 248, the eighth high-voltage vacuum relay; 251, the first vacuum relay; 252, the second vacuum relay; 253, the third vacuum relay; 254, the fourth vacuum relay; 255, the fifth vacuum relay. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the embodiments, but the embodiments of the present invention are not limited thereto.

[0026] Example 1

[0027] like Figure 1 and Figure 2As shown, this embodiment provides a grounding detection system for silicon rods in a polysilicon reduction furnace, including an insulation tester 100. The insulation tester 100 is connected to the main circuit 200 through a first high-voltage vacuum relay 241 (K2) and a second high-voltage vacuum relay 242 (K4). The insulation tester 100 is connected to a fiber optic transceiver 400 through a power control cabinet PLC 300. The fiber optic transceiver 400 is respectively connected to a host computer 500, a touch screen HMI 600, and a TPC controller 700. The TPC controller 700 is connected to a high-voltage coupler 800. The power control cabinet PLC 300 controls the opening and closing of a vacuum contactor in the main circuit 200. The TPC controller 700 and the high-voltage coupler 800 control the opening and closing of the first high-voltage vacuum relay 241, the second high-voltage vacuum relay 242, and the high-voltage vacuum relay in the main circuit 200. The insulation tester 100 is used to detect electrode resistance. The touch screen HMI 600 or the host computer 500 operates the electrode resistance test, and the touch screen HMI 600 displays the test data.

[0028] Example 2

[0029] like Figure 3 As shown, the difference between this embodiment and embodiment 1 is that the main circuit 200 includes a multi-head transformer 210 and a voltage regulating circuit 220. The voltage regulating circuit 220 includes a main voltage regulator 221, a sub-voltage regulator 222, and a boost module 223. One end of the main voltage regulator 221 is connected to the tap of the multi-head transformer 210, one end of the sub-voltage regulator 222 is connected to one end of the main voltage regulator 221, and the other end of the sub-voltage regulator 222 is connected to the boost module 223 (TM).

[0030] Multi-terminal transformer 210 is a multi-tap 10kV reduction transformer with only five taps: CT1, CT2, CT3, CT4, and CT5. The main voltage regulator 221 has a connector called CT6, and the interface between the auxiliary voltage regulator 222 and the boost module 223 is called CT7. CT1-CT5 are connected to terminals V1-V5 of the main voltage regulator 221, respectively. A connecting line extends from the input terminals of CT1 and CT2, and is connected to the auxiliary voltage regulator 222. The main voltage regulator 221 includes five voltage regulators: V1, V2, V3, V4, and V5; the auxiliary voltage regulator 222 includes two voltage regulators: VB1 and VB2.

[0031] The output end of the main voltage regulator 221 is connected to the first bus 224 (C1), and the first output end of the first bus 224 (C1) is connected to the load component 227 through the first circuit breaker 225 (QF1) and the third switch 226 (CJ3) connected in parallel; two taps of the multi-head transformer 210 are respectively connected to the input end of a voltage regulator to form a sub-voltage regulator 222 connected in parallel with the main voltage regulator 221, and the output end of the sub-voltage regulator 222 is connected to the second bus 228 (C2), and the first output end of the second bus 228 (C2) is connected through The second switch 230 (CJ2) and the fourth high-voltage vacuum relay 244 (K1) connected in parallel with the first switch 229 (CJ1) are connected to the electrode 227, the first output end of the boost module 223 (TM) is connected to the common end of the second switch 230 (CJ2) and the load 227, and the load 227 is connected to the second output end of the boost module 223 (TM), the output end of the multi-head transformer 210, the second output end of the first busbar 224 (C1), and the second output end of the second busbar 228 (C2) through the second circuit breaker 231 (QF2).

[0032] The load assembly 227 includes a first electrode (D1), a first pair of silicon rods (R1), a second-third electrode (D23), a second pair of silicon rods (R2), a fourth-fifth electrode (D45), a third pair of silicon rods (R3), a sixth-seventh electrode (D67), a fourth pair of silicon rods (R4) and an eighth electrode (D8) connected in sequence.

[0033] Among them, the fourth high-voltage vacuum relay 244 (K1) is connected to one end of the first electrode (D1) through the first vacuum relay 251 (K11), the fourth high-voltage vacuum relay 244 (K1) is connected to the second-third electrode (D23) between the first silicon rod (R1) and the second silicon rod (R2) through the fifth high-voltage vacuum relay 252 (K5), the fourth high-voltage vacuum relay 244 (K1) is connected to the fourth-fifth electrode (D45) between the second silicon rod (R2) and the third silicon rod (R3) through the second vacuum relay 252 (K12), the fourth high-voltage vacuum relay 244 (K1) is connected to the sixth-seventh electrode (D67) between the third silicon rod (R3) and the fourth silicon rod (R4) through the sixth high-voltage vacuum relay 246 (K6), and the fourth high-voltage vacuum relay 244 (K1) is connected to one end of the eighth electrode (D8) through the third vacuum relay 253 (K13).

[0034] The insulation tester 100 is grounded via a third high-voltage vacuum relay 243 (K3).

[0035] Automatic insulation detection system detects 4 pairs of rod power cabinets:

[0036] First electrode (D1): Operate the silicon core resistance test on the touch screen HMI or the host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will trigger an alarm, and the alarm threshold can be customized by the user. K1, QF1, CJ3, K12, K13, K5, and K6 are all in the open state. The power control cabinet PLC controls the K11 vacuum contactor to close, and the controller TPC controls the K2 and K3 high-voltage vacuum relays to close.

[0037] The second and third electrodes (D23): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will alarm, and the alarm threshold can be customized by the user; K1, QF1, CJ3, K11, K12, K13, and K6 are all in the open state, and the controller TPC controls the K2, K3, and K5 high-voltage vacuum relays to close;

[0038] The fourth and fifth electrodes (D45): Operate the silicon core resistance test on the touch screen HMI or host computer, and control the PLC to control the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will alarm, and the alarm threshold can be customized by the user; K1, QF1, CJ3, K11, K13, K5, and K6 are all in the open state. The power control cabinet PLC controls the K12 vacuum contactor to close, and the controller TPC controls the K2 and K3 high-voltage vacuum relays to close.

[0039] Electrode 67 (D67): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will trigger an alarm, and the alarm threshold can be customized by the user. K1, QF1, CJ3, K11, K12, K13, and K5 are all in the open state. The controller TPC controls the K2, K3, and K6 high-voltage vacuum relays to close.

[0040] The eighth electrode (D8): Operate the silicon core resistance test on the touch screen HMI or the host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will alarm, and the alarm threshold can be customized by the user; K1, QF, CJ3, K11, K12, K5, and K6 are all in the open state. The power control cabinet PLC controls the K13 vacuum contactor to close, and the controller TPC controls the K2 and K3 high-voltage vacuum relays to close.

[0041] Example 3

[0042] like Figure 4 As shown, the difference between this embodiment and embodiment 2 is that the load assembly 227 includes a first electrode (D1), a first pair of silicon rods (R1), a second-third electrode (D23), a second pair of silicon rods (R2), a fourth-fifth electrode (D45), a third pair of silicon rods (R3), a sixth-seventh electrode (D67), a fourth pair of silicon rods (R4), an eighth-ninth electrode (D89), a fifth pair of silicon rods (R5), an eleventh electrode (D1011), a sixth pair of silicon rods (R6) and a twelfth electrode (D12) connected in sequence.

[0043] The fourth high-voltage vacuum relay 244 (K1) is connected to one end of the first electrode (D1) through the first vacuum relay 251 (K11), and is connected to the second-third electrode (D23) between the first silicon rod (R1) and the second silicon rod (R2) through the fifth high-voltage vacuum relay 245 (K5); the fourth high-voltage vacuum relay 244 (K1) is connected to the fourth-fifth electrode (D45) between the second silicon rod (R2) and the third silicon rod (R3) through the second vacuum relay 252 (K12), and is connected to the fourth-fifth electrode (D45) between the second silicon rod (R2) and the third silicon rod (R3) through the sixth high-voltage vacuum relay 246 (K6). The sixth and seventh electrodes (D67) between the three silicon rods (R3) and the fourth silicon rod (R4) are connected; the fourth high-voltage vacuum relay 244 (K1) is connected to the eighth and ninth electrodes (D89) between the fourth silicon rod (R4) and the fifth silicon rod (R5) through the third vacuum relay 253 (K13); the fourth high-voltage vacuum relay 244 (K1) is connected to the eleventh electrode (D1011) between the fifth silicon rod (R5) and the sixth silicon rod (R6) through the seventh high-voltage vacuum relay 247 (K7); the fourth high-voltage vacuum relay 244 (K1) is connected to one end of the twelfth electrode (D12) through the fourth vacuum relay 254 (K14).

[0044] Automatic insulation detection system detects 6 pairs of rod power cabinets:

[0045] First electrode (D1): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will trigger an alarm, and the alarm threshold can be customized by the user. K1, QF1, CJ3, K12, K13, K14, K5, K6, and K7 are all in the open state. The power control cabinet PLC controls the K11 vacuum contactor to close, and the controller TPC controls the K2 and K3 high-voltage vacuum relays to close.

[0046] The second and third electrodes (D23): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will alarm, and the alarm threshold can be customized by the user; K1, QF1, CJ3, K11, K12, K13, K14, K6, and K7 are all in the open state. The controller TPC controls the K2, K3, and K5 high-voltage vacuum relays to close.

[0047] The fourth and fifth electrodes (D45): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will alarm, and the alarm threshold can be customized by the user. K1, QF1, CJ3, K11, K13, K14, K5, K6, and K7 are all in the open state. The PLC controls the K12 vacuum contactor to close, and the controller TPC controls the K2 and K3 high-voltage vacuum relays to close.

[0048] Electrode 67 (D67): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will alarm, and the alarm threshold can be customized by the user. K1, QF1, CJ3, K11, K12, K13, K14, K5, and K7 are all in the open state. The controller TPC controls the K2, K3, and K6 high-voltage vacuum relays to close.

[0049] Electrode 89 (D89): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will alarm, and the alarm threshold can be customized by the user. K1, QF1, CJ3, K11, K12, K14, K5, K6, and K7 are all in the open state. The power control cabinet PLC controls the K13 vacuum contactor to close, and the controller TPC controls the K2 and K3 high-voltage vacuum relays to close.

[0050] Electrode 11 (D1011): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will trigger an alarm, and the alarm threshold can be customized by the user. K1, QF1, CJ3, K11, K12, K13, K14, K5, and K6 are all in the open state. The controller TPC controls the K2, K3, and K7 high-voltage vacuum relays to close.

[0051] Twelfth electrode (D12): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will alarm, and the alarm threshold can be customized by the user; K1, QF1, CJ3, K11, K12, K13, K5, K6, and K7 are all in the open state. The power control cabinet PLC controls the K14 vacuum contactor to close, and the controller TPC controls the K2 and K3 high-voltage vacuum relays to close.

[0052] Example 4

[0053] like Figure 5 As shown, the difference between this embodiment and embodiment 2 is that the load assembly 227 includes a first electrode (D1), a first pair of silicon rods (R1), a second-third electrode (D23), a second pair of silicon rods (R2), a fourth-fifth electrode (D45), a third pair of silicon rods (R3), a sixth-seventh electrode (D67), a fourth pair of silicon rods (R4), an eighth-ninth electrode (D89), a fifth pair of silicon rods (R5), an eleventh electrode (D1011), a sixth pair of silicon rods (R6), a twenty-third electrode (D1213), a seventh pair of silicon rods (R7), a fourteenth-fifth electrode (D1415), an eighth pair of silicon rods (R8) and a sixteenth electrode (D16), which are connected in sequence.

[0054] Among them, the fourth high-voltage vacuum relay 244 (K1) is connected to one end of the first electrode (D1) through the first vacuum relay 251 (K11), and the fourth high-voltage vacuum relay 244 (K1) is connected to the second third electrode (D23) between the first silicon rod (R1) and the second silicon rod (R2) through the fifth high-voltage vacuum relay 245 (K5); the fourth high-voltage vacuum relay 244 (K1) is connected to the fourth fifth electrode (D45) between the second silicon rod (R2) and the third silicon rod (R3) through the second vacuum relay 252 (K12), and the fourth high-voltage vacuum relay 244 (K1) is connected to the sixth seventh electrode (D67) between the third silicon rod (R3) and the fourth silicon rod (R4) through the sixth high-voltage vacuum relay 246 (K6); the fourth high-voltage vacuum relay 244 (K1) is connected to the fourth silicon rod (R1) through the third vacuum relay 253 (K13). The fourth high-voltage vacuum relay 244 (K1) is connected to the eighth-ninth electrode (D89) between the fifth silicon rod (R4) and the fifth silicon rod (R5), the fourth high-voltage vacuum relay 244 (K1) is connected to the eleventh electrode (D1011) between the fifth silicon rod (R5) and the sixth silicon rod (R6) through the seventh high-voltage vacuum relay 247 (K7); the fourth high-voltage vacuum relay 244 (K1) is connected to the twenty-third electrode (D1213) between the sixth silicon rod (R6) and the seventh silicon rod (R7) through the fourth vacuum relay 254 (K14), the fourth high-voltage vacuum relay 244 (K1) is connected to the fourteenth-fifth electrode (D1415) between the seventh silicon rod (R7) and the eighth silicon rod (R8) through the eighth high-voltage vacuum relay 248 (K8); the fourth high-voltage vacuum relay 244 (K1) is connected to one end of the sixteenth electrode (D16) through the fifth vacuum relay 255 (K15).

[0055] Automatic insulation detection system detects 8 pairs of rod power cabinets:

[0056] First electrode (D1): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will trigger an alarm, and the alarm threshold can be customized by the user. K1, QF1, CJ3, K12, K13, K14, K5, K6, and K7 are all in the open state. The power control cabinet PLC controls the K11 vacuum contactor to close, and the controller TPC controls the K2 and K3 high-voltage vacuum relays to close.

[0057] The second and third electrodes (D23): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will alarm, and the alarm threshold can be customized by the user; K1, QF1, CJ3, K11, K12, K13, K14, K6, and K7 are all in the open state. The controller TPC controls the K2, K3, and K5 high-voltage vacuum relays to close.

[0058] The fourth and fifth electrodes (D45): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will trigger an alarm, and the alarm threshold can be customized by the user. K1, QF1, CJ3, K11, K13, K14, K5, K6, and K7 are all in the open state. The power control cabinet PLC controls the K12 vacuum contactor to close, and the controller TPC controls the K2 and K3 high-voltage vacuum relays to close.

[0059] Electrode 67 (D67): Operate the silicon core resistance test on the touch screen HMI or the PLC of the power control cabinet through RS485 communication to control the insulation tester for testing. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An alarm will be issued if the insulation is abnormal, and the alarm threshold can be customized by the user; K1, QF1, CJ3, K11, K12, K13, K14, K5, and K7 are all in the open state, and the controller TPC controls the K2, K3, and K6 high-voltage vacuum relays to close;

[0060] Electrode 89 (D89): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will alarm, and the alarm threshold can be customized by the user. K1, QF1, CJ3, K11, K12, K14, K5, K6, and K7 are all in the open state. The power control cabinet PLC controls the K13 vacuum contactor to close, and the controller TPC controls the K2 and K3 high-voltage vacuum relays to close.

[0061] Electrode 11 (D1011): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will trigger an alarm, and the alarm threshold can be customized by the user. K1, QF1, CJ3, K11, K12, K13, K14, K5, and K6 are all in the open state. The controller TPC controls the K2, K3, and K7 high-voltage vacuum relays to close.

[0062] Electrode 23 (D1213): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will trigger an alarm, and the alarm threshold can be customized by the user. K1, QF1, CJ3, K11, K12, K13, K5, K6, and K7 are all in the open state. The power control cabinet PLC controls the K14 vacuum contactor to close, and the controller TPC controls the K2 and K3 high-voltage vacuum relays to close.

[0063] Electrode 1415 (D1415): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will trigger an alarm, and the alarm threshold can be customized by the user. K1, QF1, CJ3, K11, K12, K13, K14, K15, K5, K6, and K7 are all in the open state. The controller TPC controls the K2, K3, and K8 high-voltage vacuum relays to close.

[0064] Sixteenth electrode (D16): Operate the silicon core resistance test on the touch screen HMI or host computer. The power control cabinet PLC controls the insulation tester through RS485 communication to perform the test. The test data can be displayed on the touch screen HMI and uploaded to the host computer. An insulation abnormality will alarm, and the alarm threshold can be customized by the user; K1, QF1, CJ3, K11, K12, K13, K14, K5, K6, K7, and K8 are all in the open state. The power control cabinet PLC controls the K15 vacuum contactor to close, and the controller TPC controls the K2 and K3 high-voltage vacuum relays to close.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention falls within the scope of protection of the present invention.

Claims

1. A grounding detection system for silicon rods in a polysilicon reduction furnace, characterized by: The invention comprises an insulation tester (100), wherein the insulation tester (100) is connected to a main circuit (200) via a first high-voltage vacuum relay (241) and a second high-voltage vacuum relay (242), wherein the insulation tester (100) is connected to an optical fiber transceiver (400) via a power control cabinet PLC (300), wherein the optical fiber transceiver (400) is respectively connected to a host computer (500), a touch screen HMI (600) and a TPC controller (700), wherein the TPC controller (700) is connected to a high-voltage coupler (800). ), the power control cabinet PLC (300) controls the opening and closing of the vacuum contactor in the main circuit (200), the TPC controller (700) and the high-voltage coupler (800) control the opening and closing of the first high-voltage vacuum relay (241), the second high-voltage vacuum relay (242) and the high-voltage vacuum relay in the main circuit (200), the insulation tester (100) is used to detect the electrode resistance, the touch screen HMI (600) or the host computer (500) operates the electrode resistance test, and the touch screen HMI (600) displays the test data.

2. A grounding detection system for silicon rods in a polysilicon reduction furnace according to claim 1, characterized in that: The main circuit (200) comprises a multi-head transformer (210) and a voltage regulating circuit (220), wherein the voltage regulating circuit (220) comprises a main voltage regulator (221), a sub-voltage regulator (222) and a boost module (223); one end of the main voltage regulator (221) is connected to a tap of the multi-head transformer (210), one end of the sub-voltage regulator (222) is connected to one end of the main voltage regulator (221), and the other end of the sub-voltage regulator (222) is connected to the boost module (223).

3. A grounding detection system for silicon rods in a polysilicon reduction furnace according to claim 2, characterized in that: The output end of the main voltage regulator (221) is connected to the first bus (224), and the first output end of the first bus (224) is connected to the load component (227) through the first circuit breaker (225) and the third switch (226) connected in parallel; two taps of the multi-head transformer (210) are respectively connected to the input end of a voltage regulator to form a sub-voltage regulator (222) connected in parallel with the main voltage regulator (221), and the output end of the sub-voltage regulator (222) is connected to the second bus (228), and the first output end of the second bus (228) is connected to the load component (227). The second switch (230) and the fourth high-voltage vacuum relay (244) connected in parallel with the first switch (229) are connected to the load component (227), the first output end of the boost module (223) is connected to the common end of the second switch (230) and the load component (227), and the load component (227) is connected to the second output end of the boost module (223), the output end of the multi-head transformer (210), the second output end of the first busbar (224), and the second output end of the second busbar (228) through the second circuit breaker (231).

4. A grounding detection system for silicon rods in a polysilicon reduction furnace according to claim 3, characterized in that: The load assembly (227) includes a first electrode, a first pair of silicon rods, a second third electrode, a second pair of silicon rods, a fourth fifth electrode, a third pair of silicon rods, a sixth seventh electrode, a fourth pair of silicon rods and an eighth electrode, which are connected in sequence.

5. A grounding detection system for silicon rods in a polysilicon reduction furnace according to claim 4, characterized in that: The fourth high-voltage vacuum relay (244) is connected to one end of the first electrode through the first vacuum relay (251), the fourth high-voltage vacuum relay (244) is connected to the second and third electrodes between the first silicon rod and the second silicon rod through the fifth high-voltage vacuum relay (245), the fourth high-voltage vacuum relay (244) is connected to the fourth and fifth electrodes between the second silicon rod and the third silicon rod through the second vacuum relay (252), the fourth high-voltage vacuum relay (244) is connected to the sixth and seventh electrodes between the third silicon rod and the fourth silicon rod through the sixth high-voltage vacuum relay (246), and the fourth high-voltage vacuum relay (244) is connected to one end of the eighth electrode through the third vacuum relay (253).

6. The grounding detection system for silicon rods in a polysilicon reduction furnace according to claim 3, characterized in that: The load assembly (227) includes a first electrode, a first pair of silicon rods, a second third electrode, a second pair of silicon rods, a fourth fifth electrode, a third pair of silicon rods, a sixth seventh electrode, a fourth pair of silicon rods, an eighth ninth electrode, a fifth pair of silicon rods, an eleventh electrode, a sixth pair of silicon rods and a twelfth electrode connected in sequence.

7. A grounding detection system for silicon rods in a polysilicon reduction furnace according to claim 6, characterized in that: The fourth high-voltage vacuum relay (244) is connected to one end of the first electrode through the first vacuum relay (251), and the fourth high-voltage vacuum relay (244) is connected to the second and third electrodes between the first silicon rod and the second silicon rod through the fifth high-voltage vacuum relay (245); the fourth high-voltage vacuum relay (244) is connected to the fourth and fifth electrodes between the second silicon rod and the third silicon rod through the second vacuum relay (252), and the fourth high-voltage vacuum relay (244) is connected to the sixth and seventh electrodes between the third silicon rod and the fourth silicon rod through the sixth high-voltage vacuum relay (246); the fourth high-voltage vacuum relay (244) is connected to the eighth and ninth electrodes between the fourth silicon rod and the fifth silicon rod through the third vacuum relay (253), and the fourth high-voltage vacuum relay (244) is connected to the eleventh electrode between the fifth silicon rod and the sixth silicon rod through the seventh high-voltage vacuum relay (247); and the fourth high-voltage vacuum relay (244) is connected to one end of the twelfth electrode through the fourth vacuum relay (254).

8. The grounding detection system for silicon rods in a polysilicon reduction furnace according to claim 3, characterized in that: The load assembly (227) includes a first electrode, a first pair of silicon rods, a second third electrode, a second pair of silicon rods, a fourth fifth electrode, a third pair of silicon rods, a sixth seventh electrode, a fourth pair of silicon rods, an eighty ninth electrode, a fifth pair of silicon rods, an eleventh electrode, a sixth pair of silicon rods, a twenty-third electrode, a seventh pair of silicon rods, a fourteenth fifth electrode, an eighth pair of silicon rods and a sixteenth electrode, which are connected in sequence.

9. A grounding detection system for silicon rods in a polysilicon reduction furnace according to claim 8, characterized in that: The fourth high-voltage vacuum relay (244) is connected to one end of the first electrode through the first vacuum relay (251), and the fourth high-voltage vacuum relay (244) is connected to the second and third electrodes between the first silicon rod and the second silicon rod through the fifth high-voltage vacuum relay (245); the fourth high-voltage vacuum relay (244) is connected to the fourth and fifth electrodes between the second silicon rod and the third silicon rod through the second vacuum relay (252), and the fourth high-voltage vacuum relay (244) is connected to the sixth and seventh electrodes between the third silicon rod and the fourth silicon rod through the sixth high-voltage vacuum relay (246); the fourth high-voltage vacuum relay (244) is connected to the sixth and seventh electrodes between the third silicon rod and the fourth silicon rod through the third vacuum relay (253). The fourth high-voltage vacuum relay (244) is connected to the eightieth and ninth electrodes between the fourth silicon rod and the fifth silicon rod, and the fourth high-voltage vacuum relay (244) is connected to the eleventh electrode between the fifth silicon rod and the sixth silicon rod through the seventh high-voltage vacuum relay (247); the fourth high-voltage vacuum relay (244) is connected to the twenty-third electrode between the sixth silicon rod and the seventh silicon rod through the fourth vacuum relay (254); the fourth high-voltage vacuum relay (244) is connected to the fourteenth and fifteenth electrodes between the seventh silicon rod and the eighth silicon rod through the eighth high-voltage vacuum relay (248); and the fourth high-voltage vacuum relay (244) is connected to one end of the sixteenth electrode through the fifth vacuum relay (255).

10. A grounding detection system for silicon rods in a polysilicon reduction furnace according to any one of claims 1 to 9, characterized in that: The insulation tester (100) is grounded via a third high-voltage vacuum relay (243).

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