A method and system for confirming the state of a gas-insulated metal-enclosed disconnector

Abstract

The present invention discloses a method and system for confirming the state of a gas-insulated metal-enclosed isolating switch. The method comprises: installing an infrared sensor and a magnetic proximity switch on the gas-insulated metal-enclosed isolating switch; determining the electrical signal state of the travel switch of the mechanical transmission system of the isolating switch; determining the infrared confirmation of the opening and closing state according to the infrared sensor; measuring the displacement of the insulating pull rod relative to the housing by the magnetic proximity switch to determine the magnetic switch confirmation of the opening and closing state; when the electrical signal state of the travel switch, the infrared confirmation of the opening and closing state, and the magnetic switch confirmation of the opening and closing state are consistent, determining that the opening and closing is successful. Thus, the operating state of the gas-insulated metal-enclosed isolating switch can be monitored online, so that the operation and maintenance personnel do not need to observe directly on site, which not only ensures accuracy but also improves efficiency.

Description

Technical Field

[0001] The present invention relates to the field of switchgear state detection, and more specifically, to a method and system for confirming the state of a gas-insulated metal-enclosed disconnector. Background Art

[0002] The existing means of detecting the status of gas-insulated metal-enclosed disconnectors are mainly background indication and on-site observation. The disconnector contacts are inside the closed shell of the equipment, and the efficiency of on-site observation is very low. In addition, since the background indication and the disconnector contacts are triple-isolated by electrical control circuit, mechanical transmission structure, and insulation transmission system, it is difficult to confirm whether the contacts are truly open or closed, which is easy to misjudge. Once misjudged, the harm is extremely serious. In the mildest case, it will cause the entire substation to shut down due to incorrect grounding, and in the worst case, it will affect the safe operation of the power grid. In order to improve the accuracy of the disconnector status detection, non-homologous detection means should be used to check the contact position and coordinate with the background indication signal.

[0003] Gas-insulated metal-enclosed disconnectors are high-voltage equipment with compact structures and high field strength inside the equipment. Sensors can only be installed outside the disconnector equipment and must be small and easy to install. The signals used by the sensors cannot rely on electrical signals and must be able to penetrate the metal shell of the disconnector.

[0004] When two or more redundant non-homogeneous detection means, i.e., multi-source sensing detection means, simultaneously confirm that the contact position is in place, it can be confirmed that the disconnector has completed opening (closing). Summary of the invention

[0005] According to the present invention, a method and system for confirming the state of a gas-insulated metal-enclosed disconnector is provided to solve the technical problem that the signal used by the sensor cannot rely on the electrical signal and can penetrate the metal shell of the disconnector. When the contact position is confirmed by two or more redundant non-homologous detection means, i.e., multi-source sensing detection means, it can be confirmed that the disconnector has completed the opening (closing) of the switch.

[0006] According to a first aspect of the present invention, a method for confirming the state of a gas-insulated metal-enclosed disconnector is provided, comprising:

[0007] Install infrared sensors and magnetic proximity switches on gas-insulated metal-enclosed disconnectors;

[0008] Determine the electrical signal status of the travel switch of the mechanical transmission system of the isolating switch;

[0009] According to the infrared sensor, determining the infrared confirmation of the opening and closing state;

[0010] The displacement of the insulating pull rod relative to the housing is measured by the magnetic proximity switch to confirm the opening and closing state of the switch;

[0011] When the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are consistent, it is determined that the opening and closing is successful.

[0012] Optionally, an infrared sensor is installed on the gas-insulated metal-enclosed disconnector, including:

[0013] A through hole through which light can pass is drilled in the diameter direction of the moving contact of the disconnector. When the disconnector is in the closed state, the upper half of the arc of the through hole is tangent to the lower edge of the shielding cover on the moving side.

[0014] An infrared transmitter and an infrared receiver are installed in the diameter direction of the shell;

[0015] The infrared sensor comprises an infrared transmitter and an infrared receiver;

[0016] The permanent magnet is installed at the end of the insulating rod close to the shell, and the magnetoresistive sensor is installed on the extension line of the center line of the insulating rod of the operating mechanism shell.

[0017] Optionally, determining the infrared confirmation of the opening and closing state according to the infrared sensor includes:

[0018] When the isolating switch is in the closed state, an opening command is sent to the infrared transmitter, and the infrared transmitter emits infrared rays to determine the third state;

[0019] If the third state is changed to the second state, the moving contact is actuated and the disconnector is in the process of opening; or if the third state is not changed to the second state, the opening fails;

[0020] If the second state is converted to the first state, the moving contact is in place to open, confirming that the disconnector is open. If the second state is not converted to the first state, the moving contact is not in place to open, and the opening fails.

[0021] Optionally, determining the infrared confirmation of the opening and closing state according to the infrared sensor includes:

[0022] When the isolating switch is in the open state, a closing command is sent to the infrared transmitter, and the infrared transmitter emits infrared rays to determine the first state;

[0023] If the first state is changed to the second state, the moving contact is actuated and the disconnector is in the process of closing, or if the first state is not changed to the second state, the closing fails;

[0024] If the second state is changed to the third state, the moving contact is closed in place, confirming that the disconnector is closed. If the second state is not changed to the third state, the moving contact is not closed in place, and the closing fails.

[0025] Optionally, when the first state is the open state, the infrared ray directly reaches the infrared receiver;

[0026] The second state is that no infrared signal is received during the opening and closing process;

[0027] When the third state is the closing state, infrared rays pass through the moving contact through hole and reach the infrared receiver.

[0028] Optionally, measuring the displacement of the insulating pull rod relative to the housing by the magnetic proximity switch to determine whether the magnetic switch confirms the opening and closing state includes:

[0029] When the isolating switch is closed, the insulating pull rod moves and the output voltage of the magnetic resistance sensor decreases;

[0030] If the output voltage of the magnetoresistive sensor does not change, the closing operation fails;

[0031] If the output voltage of the magnetoresistive sensor reaches V min , the moving contact is in place, confirming that the isolating switch is closed;

[0032] If the output voltage of the magnetoresistive sensor does not reach V min , the closing fails.

[0033] Optionally, measuring the displacement of the insulating pull rod relative to the housing by the magnetic proximity switch to determine whether the magnetic switch confirms the opening and closing state includes:

[0034] When the isolating switch is opened, the insulating pull rod moves and the output voltage of the magnetic resistance sensor increases;

[0035] If the output voltage of the magnetoresistive sensor does not change, the opening fails;

[0036] If the output voltage of the magnetoresistive sensor reaches V max , the moving contact is in place, confirming that the isolating switch is open;

[0037] If the output voltage of the magnetoresistive sensor does not reach V max , the opening fails.

[0038] Optionally, when the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are consistent, determining that the opening and closing is successful includes:

[0039] When the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are all in the closing state, it is determined that the closing is successful;

[0040] When the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are all in the opening state, it is determined that the opening is successful.

[0041] According to another aspect of the present invention, a gas-insulated metal-enclosed disconnector status confirmation system is provided, comprising:

[0042] Installation module for installing infrared sensors and magnetic proximity switches on gas-insulated metal-enclosed disconnectors;

[0043] An electrical signal state determination module is used to determine the electrical signal state of a travel switch of a mechanical transmission system of an isolating switch;

[0044] A first opening and closing state determination module is used to determine the opening and closing state of the infrared confirmation according to the infrared sensor;

[0045] A module for determining a second opening and closing state is used to measure the displacement of the insulating pull rod relative to the housing through the magnetic proximity switch, and determine that the magnetic switch confirms the opening and closing state;

[0046] The module for determining the success of opening and closing is used to determine that the opening and closing is successful when the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are consistent.

[0047] Optionally, install modules including:

[0048] The through-hole drilling module is used to drill a through-hole in the diameter direction of the moving contact of the disconnector so that light can pass through. When the disconnector is in the closed state, the upper half of the arc of the through-hole is tangent to the lower edge of the moving side shielding cover;

[0049] Installing an infrared sensor submodule, which is used to install an infrared transmitter and an infrared receiver in the diameter direction of the housing;

[0050] The infrared sensor comprises an infrared transmitter and an infrared receiver;

[0051] The magnetic switch submodule is installed to install the permanent magnet at the end of the insulating pull rod close to the shell, and the magnetic resistance sensor is installed on the extension line of the center line of the insulating pull rod of the operating mechanism shell.

[0052] Optionally, the module for determining a first opening and closing state includes:

[0053] The third state determination submodule is used to send an opening instruction to the infrared transmitter when the isolating switch is in the closed state, and the infrared transmitter sends infrared rays to determine the third state;

[0054] The submodule for converting the third state to the second state is used for, if the third state is converted to the second state, the moving contact is actuated and the disconnector is in the process of opening, or if the third state is not converted to the second state, the opening fails;

[0055] The submodule for converting the second state to the first state is used to confirm that the disconnector is opened if the second state is converted to the first state, and that the moving contact is not opened if the second state is not converted to the first state.

[0056] Optionally, the module for determining a first opening and closing state includes:

[0057] A first state determination submodule is used to send a closing instruction to the infrared transmitter when the isolating switch is in an open state, and the infrared transmitter sends infrared rays to determine the first state;

[0058] The submodule for converting the first state to the second state is used for, if the first state is converted to the second state, the moving contact is actuated and the disconnector is in the closing process, or if the first state is not converted to the second state, the closing fails;

[0059] The submodule for converting the second state to the third state is used to confirm that the disconnector is closed if the second state is converted to the third state, and that the moving contact is closed if the second state is not converted to the third state.

[0060] Optionally, when the first state is the open state, the infrared ray directly reaches the infrared receiver;

[0061] The second state is that no infrared signal is received during the opening and closing process;

[0062] When the third state is the closing state, infrared rays pass through the moving contact through hole and reach the infrared receiver.

[0063] Optionally, the module for determining a second opening and closing state includes:

[0064] The output voltage reduction submodule is used to reduce the output voltage of the magnetoresistive sensor when the isolating switch is closed and the insulating pull rod is actuated;

[0065] The closing failure submodule is used to indicate that the closing failure occurs if the output voltage of the magnetic resistance sensor does not change;

[0066] The switch closing submodule is used to close the switch if the output voltage of the magnetic resistance sensor reaches V min , the moving contact is in place, confirming that the isolating switch is closed;

[0067] The closing failure submodule is used to detect if the output voltage of the magnetic resistance sensor does not reach V min , the closing fails.

[0068] Optionally, the module for determining a second opening and closing state includes:

[0069] The output voltage increasing submodule is used to increase the output voltage of the magnetic resistance sensor when the isolating switch is opened and the insulating pull rod is actuated;

[0070] A gate-off failure submodule, for indicating gate-off failure if the output voltage of the magnetoresistive sensor does not change;

[0071] The switch divider module is used to disconnect the magnetic resistance sensor if the output voltage reaches V max , the moving contact is in place, confirming that the isolating switch is open;

[0072] The trip failure submodule is used to max , the opening fails.

[0073] Optionally, the module for determining whether the opening and closing of the circuit breaker is successful includes:

[0074] A submodule for determining successful closing is used to determine that the closing is successful when the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are all in the closing state;

[0075] The submodule for determining whether the switch is opened successfully is used to determine whether the switch is opened successfully when the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are all in the opening state.

[0076] Thus, the state confirmation method of the gas-insulated metal-enclosed isolating switch based on multi-source sensing adds two means, infrared sensing and magnetic proximity switch, to the electrical signal of the travel switch of the original mechanical transmission system, and realizes three non-homologous gas-insulated metal-enclosed isolating switch opening and closing state detection means, triple redundant configuration, reduces the sensor false alarm rate, ensures the accuracy of the state confirmation of the gas-insulated metal-enclosed isolating switch, and ensures reliability. The detection method proposed by the present invention can monitor the operating state of the gas-insulated metal-enclosed isolating switch online, so that the operation and maintenance personnel do not need to observe directly on site, which not only ensures accuracy but also improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0078] Figure 1 It is a schematic flow chart of a method for confirming the state of a gas-insulated metal-enclosed disconnector according to this embodiment;

[0079] Figure 2 A schematic diagram of a process for determining a successful opening and closing of a switch according to this embodiment;

[0080] Figure 3 is a schematic diagram of the arrangement of infrared sensors according to this embodiment;

[0081] Figure 4 This is a schematic diagram of the infrared detection closing state confirmation principle according to this embodiment;

[0082] Figure 5 It is a schematic diagram of the principle of confirming the opening state of the infrared detection according to the present embodiment;

[0083] Figure 6 is a schematic diagram of the arrangement of the magnetic proximity switch according to this embodiment;

[0084] Figure 7 This is a schematic diagram of the principle of confirming the closing state by mechanical displacement detection according to this embodiment;

[0085] Figure 8 This is a schematic diagram of the principle of confirming the opening state of the gate by mechanical displacement detection according to this embodiment;

[0086] Fig. 9 It is a schematic diagram of a gas-insulated metal-enclosed disconnector status confirmation system according to the present embodiment. DETAILED DESCRIPTION

[0087] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0088] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0089] According to a first aspect of the present invention, a method 100 for confirming the state of a gas-insulated metal-enclosed disconnector is provided. Figure 1 As shown, the method 100 includes:

[0090] S101: Install infrared sensors and magnetic proximity switches on gas-insulated metal-enclosed disconnectors;

[0091] S102: Determine the electrical signal state of the travel switch of the mechanical transmission system of the isolating switch;

[0092] S103: Determine the infrared confirmation of the opening and closing state according to the infrared sensor;

[0093] S104: measuring the displacement of the insulating pull rod relative to the housing by the magnetic proximity switch, and determining that the magnetic switch confirms the opening and closing state;

[0094] S105: When the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are consistent, it is determined that the opening and closing is successful.

[0095] Specifically, refer to Figure 2 As shown, an infrared sensor and a magnetic proximity switch are installed at appropriate positions of the gas-insulated metal-enclosed disconnector to detect the position of the movable contact of the disconnector and the displacement of the insulating pull rod respectively. The detection method of this technical solution includes infrared detection, mechanical displacement detection, and background determination of the electrical signal state of the travel switch of the mechanical transmission system of the disconnector. When the electrical signal state of the travel switch, the infrared confirmation of the opening and closing state, and the magnetic switch confirmation of the opening and closing state are consistent, it is determined that the opening and closing is successful.

[0096] 1. Infrared detection

[0097] Sensor Installation:

[0098] refer to Figure 3 As shown, a through hole through which light can pass is drilled in the diameter direction of the moving contact of the disconnector. When the disconnector is in the closed state, the upper half of the arc of the through hole is tangent to the lower edge of the moving side shielding cover; a laser transmitter and a receiver are installed in the diameter direction of the shell (if there is an observation window at the corresponding position on the shell, the receiver can be installed at the observation window position). When the shell is in the closed state, the infrared light emitted by the infrared transmitter should be able to reach the infrared receiver through the through hole on the moving contact; when the shell is in the open state, the moving contact is retracted into the moving side shielding cover, and the infrared light emitted by the infrared transmitter can directly reach the infrared receiver; during the movement of the moving contact of the disconnector when opening and closing, the contact is located between the infrared laser transmitter and the receiver, blocking the infrared light emitted by the infrared transmitter, and the infrared receiver cannot receive the signal.

[0099] In the open state, the infrared light directly reaches the infrared receiver and is set to state 1;

[0100] During the opening and closing process, if no infrared signal is received, it is set to state 2;

[0101] When the switch is closed, the infrared ray passes through the moving contact hole and reaches the infrared receiver, which is set to state 3.

[0102] refer to Figure 4 As shown in the figure, the closing status confirmation scheme:

[0103] ①When the isolating switch is closed, a command is sent to the infrared transmitter at the same time, and the infrared transmitter emits infrared rays, which is state 1;

[0104] ② It changes to state 2, the moving contact moves, and the disconnector is in the process of closing. If it does not change to state 2, the closing fails.

[0105] ③ Continue to change to state 3, the moving contact is closed in place, and the disconnector is confirmed to be closed; if it does not change to state 3, the moving contact is not closed in place; the closing fails.

[0106] refer to Figure 5 As shown in the figure, the opening state confirmation scheme:

[0107] ①When the isolating switch is opened, a command is sent to the infrared transmitter at the same time, and the infrared transmitter emits infrared rays, which is state 3;

[0108] ② It changes to state 2, the moving contact moves, and the disconnector is in the process of opening. If it does not change to state 2, the opening fails.

[0109] ③ Continue to change to state 1, the moving contact opens in place, confirming that the disconnector is open; if it does not change to state 1, the moving contact does not open in place; the opening fails.

[0110] 2. Mechanical displacement detection

[0111] During the opening and closing process of the disconnector, the insulating rod transmits the mechanical force of the operating mechanism to the moving contact, and the insulating rod is displaced relative to the housing. The opening and closing state of the moving contact can be determined by measuring the displacement of the insulating rod using a magnetic proximity switch.

[0112] Sensor installation scheme:

[0113] refer to Figure 6 As shown, the permanent magnet is installed at the end of the insulating rod close to the shell, and the magnetoresistive sensor is installed on the extension line of the center line of the insulating rod of the operating mechanism shell.

[0114] The output signal of the magnetoresistive sensor is linearly related to the magnetic induction intensity. In the open state, the permanent magnet and the magnetoresistive sensor are closest, and the magnetic field sensed by the magnetoresistive sensor is the largest. The output voltage of the magnetoresistive sensor in this state is V max During the closing process, the permanent magnet moves with the insulating rod and moves away from the housing. The magnetic field at the position of the magnetoresistive sensor becomes smaller, and the output voltage of the magnetoresistive sensor becomes smaller. When the switch is closed, the permanent magnet and the magnetoresistive sensor are farthest away, and the magnetic field sensed by the magnetoresistive sensor is the smallest. The output voltage of the magnetoresistive sensor in this state is recorded as V min During the opening process, the permanent magnet moves with the insulating pull rod and approaches the shell. The magnetic field at the position of the magnetoresistive sensor becomes larger, and the output voltage of the magnetoresistive sensor becomes larger.

[0115] refer to Figure 7 As shown in the figure, the closing status confirmation scheme:

[0116] When the isolating switch is closed, the insulating rod moves, and the output voltage of the magnetic resistance sensor should decrease; if it does not change, the closing fails; the output voltage of the magnetic resistance sensor reaches V min , the moving contact is closed in place, confirming that the disconnector is closed; if V min , the closing fails.

[0117] refer to Figure 8 As shown in the figure, the opening state confirmation scheme:

[0118] When the disconnector opens, the insulating rod moves, and the output voltage of the magnetoresistive sensor should increase; if it does not change, the opening fails; the output voltage of the magnetoresistive sensor reaches V max , the moving contact opens in place, confirming that the disconnector is open; if V max , the opening fails.

[0119] The original mechanical transmission system is equipped with a travel switch with electrical signal + light + magnetism, and triple redundancy configuration to ensure reliability.

[0120] Therefore, the gas-insulated metal-enclosed isolating switch state confirmation method based on multi-source sensing adds two means, infrared sensing and magnetic proximity switch, to the original mechanical transmission system's travel switch electrical signal, to realize three non-homologous gas-insulated metal-enclosed isolating switch opening and closing state detection means, and triple redundant configuration, which reduces the sensor false alarm rate, ensures the accuracy of the gas-insulated metal-enclosed isolating switch state confirmation, and ensures reliability.

[0121] The detection method proposed by the present invention can monitor the operating status of the gas-insulated metal-enclosed disconnector online, so that operation and maintenance personnel do not need to observe directly on site, which not only ensures accuracy but also improves efficiency.

[0122] Optionally, an infrared sensor is installed on the gas-insulated metal-enclosed disconnector, including:

[0123] A through hole through which light can pass is drilled in the diameter direction of the moving contact of the disconnector. When the disconnector is in the closed state, the upper half of the arc of the through hole is tangent to the lower edge of the shielding cover on the moving side.

[0124] An infrared transmitter and an infrared receiver are installed in the diameter direction of the shell;

[0125] The infrared sensor comprises an infrared transmitter and an infrared receiver;

[0126] The permanent magnet is installed at the end of the insulating rod close to the shell, and the magnetoresistive sensor is installed on the extension line of the center line of the insulating rod of the operating mechanism shell.

[0127] Optionally, determining the infrared confirmation of the opening and closing state according to the infrared sensor includes:

[0128] When the isolating switch is in the closed state, an opening command is sent to the infrared transmitter, and the infrared transmitter emits infrared rays to determine the third state;

[0129] If the third state is changed to the second state, the moving contact is actuated and the disconnector is in the process of opening; or if the third state is not changed to the second state, the opening fails;

[0130] If the second state is converted to the first state, the moving contact is in place to open, confirming that the disconnector is open. If the second state is not converted to the first state, the moving contact is not in place to open, and the opening fails.

[0131] Optionally, determining the infrared confirmation of the opening and closing state according to the infrared sensor includes:

[0132] When the isolating switch is in the open state, a closing command is sent to the infrared transmitter, and the infrared transmitter emits infrared rays to determine the first state;

[0133] If the first state is changed to the second state, the moving contact is actuated and the disconnector is in the process of closing, or if the first state is not changed to the second state, the closing fails;

[0134] If the second state is changed to the third state, the moving contact is closed in place, confirming that the disconnector is closed. If the second state is not changed to the third state, the moving contact is not closed in place, and the closing fails.

[0135] Optionally, when the first state is the open state, the infrared ray directly reaches the infrared receiver;

[0136] The second state is that no infrared signal is received during the opening and closing process;

[0137] When the third state is the closing state, infrared rays pass through the moving contact through hole and reach the infrared receiver.

[0138] Optionally, measuring the displacement of the insulating pull rod relative to the housing by the magnetic proximity switch to determine whether the magnetic switch confirms the opening and closing state includes:

[0139] When the isolating switch is closed, the insulating pull rod moves and the output voltage of the magnetic resistance sensor decreases;

[0140] If the output voltage of the magnetoresistive sensor does not change, the closing operation fails;

[0141] If the output voltage of the magnetoresistive sensor reaches V min , the moving contact is in place, confirming that the isolating switch is closed;

[0142] If the output voltage of the magnetoresistive sensor does not reach V min , the closing fails.

[0143] Optionally, measuring the displacement of the insulating pull rod relative to the housing by the magnetic proximity switch to determine whether the magnetic switch confirms the opening and closing state includes:

[0144] When the isolating switch is opened, the insulating pull rod moves and the output voltage of the magnetic resistance sensor increases;

[0145] If the output voltage of the magnetoresistive sensor does not change, the opening fails;

[0146] If the output voltage of the magnetoresistive sensor reaches V max , the moving contact is in place, confirming that the isolating switch is open;

[0147] If the output voltage of the magnetoresistive sensor does not reach V max , the opening fails.

[0148] Optionally, when the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are consistent, determining that the opening and closing is successful includes:

[0149] When the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are all in the closing state, it is determined that the closing is successful;

[0150] When the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are all in the opening state, it is determined that the opening is successful.

[0151] Therefore, the gas-insulated metal-enclosed isolating switch state confirmation method based on multi-source sensing adds two means, infrared sensing and magnetic proximity switch, to the original mechanical transmission system's travel switch electrical signal, to realize three non-homologous gas-insulated metal-enclosed isolating switch opening and closing state detection means, and triple redundant configuration, which reduces the sensor false alarm rate, ensures the accuracy of the gas-insulated metal-enclosed isolating switch state confirmation, and ensures reliability.

[0152] The detection method proposed by the present invention can monitor the operating status of the gas-insulated metal-enclosed disconnector online, so that operation and maintenance personnel do not need to observe directly on site, which not only ensures accuracy but also improves efficiency.

[0153] According to another aspect of the present invention, a gas-insulated metal-enclosed disconnector status confirmation system 900 is provided. Fig. 9 As shown, the system 900 includes:

[0154] Installation module 910, used for installing infrared sensors and magnetic proximity switches on gas-insulated metal-enclosed disconnectors;

[0155] An electrical signal state determination module 920 is used to determine an electrical signal state of a travel switch of a mechanical transmission system of an isolating switch;

[0156] A first opening and closing state determination module 930 is used to determine an infrared confirmation opening and closing state according to the infrared sensor;

[0157] A second opening and closing state determination module 940 is used to measure the displacement of the insulating pull rod relative to the housing through the magnetic proximity switch to determine the opening and closing state confirmed by the magnetic switch;

[0158] The module 850 for determining the success of opening and closing is used to determine that the opening and closing is successful when the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are consistent.

[0159] Optionally, the installation module 910 includes:

[0160] The through-hole drilling module is used to drill a through-hole in the diameter direction of the moving contact of the disconnector so that light can pass through. When the disconnector is in the closed state, the upper half of the arc of the through-hole is tangent to the lower edge of the moving side shielding cover;

[0161] Installing an infrared sensor submodule, which is used to install an infrared transmitter and an infrared receiver in the diameter direction of the housing;

[0162] The infrared sensor comprises an infrared transmitter and an infrared receiver;

[0163] The magnetic switch submodule is installed to install the permanent magnet at the end of the insulating pull rod close to the shell, and the magnetic resistance sensor is installed on the extension line of the center line of the insulating pull rod of the operating mechanism shell.

[0164] Optionally, the module 930 for determining the first opening and closing state includes:

[0165] The third state determination submodule is used to send an opening instruction to the infrared transmitter when the isolating switch is closed, and the infrared transmitter sends infrared rays to determine the third state;

[0166] The submodule for converting the third state to the second state is used for, if the third state is converted to the second state, the moving contact is actuated and the disconnector is in the process of opening, or if the third state is not converted to the second state, the opening fails;

[0167] The submodule for converting the second state to the first state is used to confirm that the disconnector is opened if the second state is converted to the first state, and that the moving contact is not opened if the second state is not converted to the first state.

[0168] Optionally, the module 930 for determining the first opening and closing state includes:

[0169] A first state determination submodule is used to send a closing instruction to the infrared transmitter when the isolating switch is in an open state, and the infrared transmitter sends infrared rays to determine the first state;

[0170] The submodule for converting the first state to the second state is used for, if the first state is converted to the second state, the moving contact is actuated and the disconnector is in the closing process, or if the first state is not converted to the second state, the closing fails;

[0171] The submodule for converting the second state to the third state is used to confirm that the disconnector is closed if the second state is converted to the third state, and that the moving contact is closed if the second state is not converted to the third state.

[0172] Optionally, when the first state is the open state, the infrared ray directly reaches the infrared receiver;

[0173] The second state is that no infrared signal is received during the opening and closing process;

[0174] When the third state is the closing state, infrared rays pass through the moving contact through hole and reach the infrared receiver.

[0175] Optionally, the module 940 for determining the second opening and closing state includes:

[0176] The output voltage reduction submodule is used to reduce the output voltage of the magnetoresistive sensor when the isolating switch is closed and the insulating pull rod is actuated;

[0177] The closing failure submodule is used to indicate that the closing failure occurs if the output voltage of the magnetic resistance sensor does not change;

[0178] The switch closing submodule is used to close the switch if the output voltage of the magnetic resistance sensor reaches V min , the moving contact is in place, confirming that the isolating switch is closed;

[0179] The closing failure submodule is used to detect if the output voltage of the magnetic resistance sensor does not reach V min , the closing fails.

[0180] Optionally, the module 940 for determining the second opening and closing state includes:

[0181] The output voltage increasing submodule is used to increase the output voltage of the magnetic resistance sensor when the isolating switch is opened and the insulating pull rod is actuated;

[0182] A gate-off failure submodule, for indicating gate-off failure if the output voltage of the magnetoresistive sensor does not change;

[0183] The switch divider module is used to disconnect the magnetic resistance sensor if the output voltage reaches V max , the moving contact is in place, confirming that the isolating switch is open;

[0184] The trip failure submodule is used to max , the opening fails.

[0185] Optionally, the module 950 for determining whether the switch is opened or closed successfully includes:

[0186] A submodule for determining successful closing is used to determine that the closing is successful when the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are all in the closing state;

[0187] The submodule for determining whether the switch is opened successfully is used to determine whether the switch is opened successfully when the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are all in the opening state.

[0188] A gas-insulated metal-enclosed disconnector status confirmation system 900 according to an embodiment of the present invention corresponds to a gas-insulated metal-enclosed disconnector status confirmation method 100 according to another embodiment of the present invention, and will not be described in detail herein.

[0189] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0190] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0191] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0192] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0193] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0194] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for confirming the state of a gas-insulated metal-enclosed disconnector, characterized in that: include: Install infrared sensors and magnetic proximity switches on gas-insulated metal-enclosed disconnectors; Determine the electrical signal status of the travel switch of the mechanical transmission system of the disconnector; According to the infrared sensor, the infrared confirmation of the opening and closing state is determined; the displacement of the insulating pull rod relative to the housing is measured by the magnetic proximity switch to determine the opening and closing state confirmed by the magnetic switch; When the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are consistent, it is determined that the opening and closing is successful; Install infrared sensors on gas-insulated metal-enclosed disconnectors, including: A through hole is drilled in the diameter direction of the moving contact of the disconnector so that light can pass through. When the disconnector is in the closed state, the upper half of the arc of the through hole is tangent to the lower edge of the shielding cover on the moving side. An infrared transmitter and an infrared receiver are installed in the diameter direction of the shell; The infrared sensor comprises an infrared transmitter and an infrared receiver; The permanent magnet is installed at the end of the insulating rod close to the housing, and the magnetic resistance sensor is installed on the extension line of the center line of the insulating rod of the operating mechanism housing; According to the infrared sensor, determining the infrared confirmation of the opening and closing state includes: When the isolating switch is in the closed state, an opening command is sent to the infrared transmitter, and the infrared transmitter emits infrared rays to determine the third state; If the third state is changed to the second state, the moving contact is actuated and the disconnector is in the process of opening; or if the third state is not changed to the second state, the opening fails; If the second state is changed to the first state, the moving contact is in place to open, confirming that the disconnector is open; if the second state is not changed to the first state, the moving contact is not in place to open, and the opening fails; According to the infrared sensor, determining the infrared confirmation of the opening and closing state includes: When the isolating switch is in the open state, a closing command is sent to the infrared transmitter, and the infrared transmitter emits infrared rays to determine the first state; If the first state is changed to the second state, the moving contact is actuated and the disconnector is in the process of closing, or if the first state is not changed to the second state, the closing fails; If the second state is changed to the third state, the moving contact is closed in place, confirming that the disconnector is closed; if the second state is not changed to the third state, the moving contact is not closed in place, and the closing fails; When the first state is the open state, the infrared ray directly reaches the infrared receiver; The second state is that no infrared signal is received during the opening and closing process; When the third state is the closing state, infrared rays pass through the moving contact through hole and reach the infrared receiver.

2. The method according to claim 1, characterized in that: Measuring the displacement of the insulating pull rod relative to the housing by the magnetic proximity switch to determine the opening and closing state of the magnetic switch, including: When the isolating switch is closed, the insulating pull rod moves and the output voltage of the magnetic resistance sensor decreases; If the output voltage of the magnetoresistive sensor does not change, the closing operation fails; If the output voltage of the magnetoresistive sensor reaches V min , the moving contact is in place, confirming that the isolating switch is closed; If the output voltage of the magnetoresistive sensor does not reach V min , the closing fails.

3. The method according to claim 1, characterized in that Measuring the displacement of the insulating pull rod relative to the housing by the magnetic proximity switch to determine the opening and closing state of the magnetic switch, including: When the isolating switch is opened, the insulating pull rod moves and the output voltage of the magnetic resistance sensor increases; If the output voltage of the magnetoresistive sensor does not change, the opening fails; If the output voltage of the magnetoresistive sensor reaches V max , the moving contact is in place, confirming that the isolating switch is open; If the output voltage of the magnetoresistive sensor does not reach V max , the opening fails.

4. The method according to claim 1, characterized in that When the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are consistent, it is determined that the opening and closing is successful, including: When the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are all in the closing state, it is determined that the closing is successful; When the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are all in the opening state, it is determined that the opening is successful.

5. A gas-insulated metal-enclosed disconnector status confirmation system, characterized in that: include: Installation module for installing infrared sensors and magnetic proximity switches on gas-insulated metal-enclosed disconnectors; An electrical signal state determination module is used to determine the electrical signal state of a travel switch of a mechanical transmission system of an isolating switch; A first opening and closing state determination module is used to determine the opening and closing state of the infrared confirmation according to the infrared sensor; A module for determining a second opening and closing state is used to measure the displacement of the insulating pull rod relative to the housing through the magnetic proximity switch, and determine that the magnetic switch confirms the opening and closing state; A module for determining the success of opening and closing is used to determine that the opening and closing is successful when the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are consistent; Install the module, including: The through-hole drilling module is used to drill a through-hole in the diameter direction of the moving contact of the disconnector so that light can pass through. When the disconnector is in the closed state, the upper half of the arc of the through-hole is tangent to the lower edge of the moving side shielding cover; Installing an infrared sensor submodule, which is used to install an infrared transmitter and an infrared receiver in the diameter direction of the housing; The infrared sensor comprises an infrared transmitter and an infrared receiver; Install the magnetic switch submodule, which is used to install the permanent magnet at the end of the insulating pull rod close to the housing, and install the magnetic resistance sensor on the extension line of the center line of the insulating pull rod of the housing of the actuator; The module for determining the first opening and closing state includes: The third state determination submodule is used to send an opening instruction to the infrared transmitter when the isolating switch is in the closed state, and the infrared transmitter sends infrared rays to determine the third state; The submodule for converting the third state to the second state is used for, if the third state is converted to the second state, the moving contact is actuated and the disconnector is in the process of opening, or if the third state is not converted to the second state, the opening fails; The submodule for converting the second state to the first state is used for, if the second state is converted to the first state, the moving contact is in place to open, confirming that the disconnector is open; if the second state is not converted to the first state, the moving contact is not in place to open, and the opening fails; The module for determining the first opening and closing state includes: The first state determination submodule is used to send a closing instruction to the infrared transmitter when the isolating switch is in the open state, and the infrared transmitter sends infrared rays to determine the first state; The submodule for converting the first state to the second state is used for, if the first state is converted to the second state, the moving contact is actuated and the disconnector is in the closing process, or if the first state is not converted to the second state, the closing fails; The submodule for converting the second state to the third state is used for, if the second state is converted to the third state, the moving contact is closed in place, confirming that the disconnector is closed; if the second state is not converted to the third state, the moving contact is not closed in place, and the closing fails; When the first state is the open state, the infrared ray directly reaches the infrared receiver; The second state is that no infrared signal is received during the opening and closing process; When the third state is the closing state, infrared rays pass through the moving contact through hole and reach the infrared receiver.

6. The system according to claim 5, characterized in that The module for determining the second opening and closing state includes: The output voltage reduction submodule is used to reduce the output voltage of the magnetoresistive sensor when the isolating switch is closed and the insulating pull rod is actuated; The closing failure submodule is used to indicate that the closing failure occurs if the output voltage of the magnetic resistance sensor does not change; The switch closing submodule is used to close the switch if the output voltage of the magnetic resistance sensor reaches V min , the moving contact is in place, confirming that the isolating switch is closed; The closing failure submodule is used to detect if the output voltage of the magnetic resistance sensor does not reach V min , the closing fails.

7. The system according to claim 5, characterized in that The module for determining the second opening and closing state includes: The output voltage increasing submodule is used to increase the output voltage of the magnetic resistance sensor when the isolating switch is opened and the insulating pull rod is actuated; A gate-off failure submodule, for indicating gate-off failure if the output voltage of the magnetoresistive sensor does not change; The switch divider module is used to disconnect the magnetic resistance sensor if the output voltage reaches V max , the moving contact is in place, confirming that the isolating switch is open; The trip failure submodule is used to max , the opening fails.

8. The system according to claim 5, characterized in that Determine the successful opening and closing module, including: A submodule for determining successful closing is used to determine that the closing is successful when the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are all in the closing state; The submodule for determining whether the switch is opened successfully is used to determine whether the switch is opened successfully when the electrical signal state of the travel switch, the opening and closing state confirmed by the infrared, and the opening and closing state confirmed by the magnetic switch are all in the opening state.

Images