CN113922328A - Method, device and equipment for underground leakage protection and storage medium - Google Patents
Method, device and equipment for underground leakage protection and storage medium Download PDFInfo
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- H—ELECTRICITY
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- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
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Abstract
The disclosure provides a method, a device, equipment and a storage medium for mine underground leakage protection, which relate to the technical field of coal mine safety protection, and the specific implementation scheme is as follows: acquiring the insulation resistance value of the current power supply system; under the condition that the resistance value of the insulation resistor is smaller than the resistance threshold value, acquiring zero sequence current and zero sequence voltage of each branch circuit, which are respectively acquired by each branch controller; determining fault branches according to the zero sequence current and the zero sequence voltage of each branch; and controlling the fault branch to trip. Therefore, potential safety hazards caused by faults of the master controller are effectively avoided, the safety of the underground power grid is further guaranteed, and the reliability and accuracy of electric leakage identification are improved.
Description
Technical Field
The disclosure relates to the technical field of coal mine safety protection, and in particular relates to a method, a device, equipment and a storage medium for mine underground leakage protection.
Background
Leakage protection plays a vital role in underground power supply of coal mines, and in the national coal mine safety regulations, a leakage detection device for automatically cutting off a leakage feed line of an underground power grid is required to be installed. At present, all underground low-voltage power grids in China are provided with leakage protection devices, and the leakage protection devices play an important role, so that underground safe production is guaranteed, and life safety of personnel is guaranteed.
At present, the leakage protection used under the mine is a decentralized mode, and the leakage conditions can be judged independently, so that the development requirements of a mine power grid cannot be met. Therefore, how to more effectively and accurately judge the power grid leakage situation and further adopt the suppression strategy is a problem which needs to be solved urgently in the production safety of the coal mine at present.
Disclosure of Invention
The disclosure provides a method, a device, equipment and a storage medium for underground leakage protection.
According to one aspect of the disclosure, a mine underground leakage protection method is provided, which includes:
acquiring the insulation resistance value of the current power supply system;
under the condition that the resistance value of the insulation resistor is smaller than the resistance threshold value, acquiring zero sequence current and zero sequence voltage of each branch circuit, which are respectively acquired by each branch controller;
determining fault branches according to the zero sequence current and the zero sequence voltage of each branch;
and controlling the fault branch to trip.
According to a second aspect of the present disclosure, there is provided an underground mine earth leakage protection device, comprising:
the first acquisition module is used for acquiring the insulation resistance value of the current power supply system;
the second obtaining module is used for obtaining the zero sequence current and the zero sequence voltage of each branch circuit respectively collected by each branch controller under the condition that the resistance value of the insulation resistor is smaller than the resistance threshold value;
the determining module is used for determining fault branches according to the zero sequence current and the zero sequence voltage of each branch;
and the control module is used for controlling the fault branch circuit to trip.
Optionally, the first obtaining module is specifically configured to:
and determining the resistance value of the insulation resistor of the power supply system according to the leakage current value in an additional direct-current power supply loop attached to the power supply system.
Optionally, the first obtaining module is further configured to:
and determining that the power supply system is in a current power-tight state under the condition that the resistance value of the insulation resistor is greater than or equal to the resistance threshold value.
Optionally, the determining module is specifically configured to:
comparing the zero sequence current of each branch with a current threshold value respectively to determine a first judgment result;
and determining any branch as a fault branch under the condition that the first judgment result is that the zero sequence current of any branch is greater than the current threshold.
Optionally, the determining module is specifically configured to:
determining a zero sequence power direction corresponding to each branch according to the zero sequence current and the zero sequence voltage of each branch;
and determining fault branches according to the zero sequence power direction corresponding to each branch.
Optionally, the control module is specifically configured to:
and driving the relay corresponding to the fault branch to trip.
Optionally, the first obtaining module is specifically configured to:
determining a current corresponding controller type label and an operation state;
and acquiring the insulation resistance value of the current power supply system under the condition that the current corresponding controller type label is the main controller and the running state is the fault-free state.
An embodiment of a third aspect of the present disclosure provides a computer device, including: the present invention relates to a computer program product, and a computer program product stored on a memory and executable on a processor, which when executed by the processor performs a method as set forth in an embodiment of the first aspect of the present application.
A fourth aspect of the present disclosure provides a non-transitory computer-readable storage medium storing a computer program, which when executed by a processor implements the method as set forth in the first aspect of the present disclosure.
A fifth aspect of the present disclosure provides a computer program product, which when executed by an instruction processor performs the method provided in the first aspect of the present disclosure.
In the embodiment of the disclosure, an insulation resistance value of a current power supply system is first obtained, then, under the condition that the insulation resistance value is smaller than a resistance threshold value, a zero sequence current and a zero sequence voltage of each branch circuit, which are respectively collected by each branch controller, are obtained, then, a fault branch circuit is determined according to the zero sequence current and the zero sequence voltage of each branch circuit, and finally, the fault branch circuit is controlled to trip. Therefore, potential safety hazards caused by faults of the master controller are effectively avoided, the safety of the underground power grid is further guaranteed, and the reliability and accuracy of electric leakage identification are improved.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present disclosure, nor do they limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.
Drawings
The drawings are included to provide a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:
fig. 1 is a schematic flow chart of a mine downhole earth leakage protection method according to an embodiment of the disclosure;
fig. 2 is a schematic flow chart of another mine downhole earth leakage protection method according to an embodiment of the disclosure;
fig. 3 shows a diagram of an earth leakage protection system;
FIG. 4 shows a software flow chart of a method for downhole earth leakage protection;
FIG. 5 shows a flow diagram of a branch controller;
fig. 6 is a block diagram of a structure of an underground leakage protection device according to an embodiment of the disclosure;
fig. 7 is a block diagram of an electronic device for implementing the method for downhole earth leakage protection according to the embodiment of the disclosure.
Detailed Description
Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, in which various details of the embodiments of the disclosure are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
The method for protecting the leakage of the underground mine provided by the disclosure can be executed by the underground leakage protection device provided by the disclosure, and can also be executed by the electronic equipment provided by the disclosure, which is not limited herein.
The underground mine earth leakage protection method provided by the present disclosure is implemented by the underground mine earth leakage protection device provided by the present disclosure, but is not limited to the present disclosure.
The method, the apparatus, the computer device, and the storage medium for mine earth leakage protection provided by the present disclosure are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a mine underground leakage protection method according to an embodiment of the disclosure.
As shown in fig. 1, the method for protecting leakage under a mine well may include the following steps:
It should be noted that, in the current power supply system, there may be a plurality of branch controllers and one main controller. The main controller and the branch controllers CAN communicate with each other through the optical fiber of the CAN bus, so that the transmission efficiency is high, the anti-interference capability is high, and the data transmission rate in the current system and the sensitivity of the underground leakage protection device CAN be improved.
In the disclosure, each branch controller and the main controller can be freely switched through the man-machine interaction device, so that potential safety hazards caused when the current master controller breaks down can be avoided, and the safety of the underground power grid is further ensured.
Specifically, the main controller and the branch controller may be DSP controllers, and both may adopt AVP32V33 as a core. In addition, peripheral circuits of the main controller and the branch controllers can be completely the same, so that any fault-free branch controller can be used as a new main controller through the man-machine interaction device under the condition that the current main controller has a fault, and the accident that the whole system is broken down due to the fault of the main controller can be effectively avoided.
Preferably, the present disclosure may determine whether the power supply system has a leakage fault by an additional dc power supply method. For example, the resistance value of the insulation resistor of the power supply system can be determined according to the leakage current value in the additional direct-current power supply loop attached to the power supply system.
Wherein, this additional DC power supply can link to each other current power supply system with ground to, when electric leakage fault takes place, power supply system can produce unbalanced voltage, and can produce leakage current on the resistance, through measuring the leakage current value in the additional DC power supply return circuit, can the analysis obtain power supply system's insulation resistance value, this disclosure does not limit here.
And 102, acquiring the zero sequence current and the zero sequence voltage of each branch circuit respectively acquired by each branch controller under the condition that the resistance value of the insulation resistor is smaller than the resistance threshold value.
If the current insulation resistance value is smaller than the resistance threshold value, that is, the operation value, it is determined that the current power supply system is in a leakage state. In order to further determine the branch circuits with the leakage condition, the zero sequence current and the zero sequence voltage of each branch circuit respectively collected by each branch controller need to be obtained.
In addition, if the current insulation resistance value is greater than or equal to the resistance threshold value, it can be determined that the power supply system is in a current power-leakage-free state.
Specifically, after the zero-sequence current and the zero-sequence voltage of each branch are acquired, the zero-sequence current and the zero-sequence voltage data of each branch can be analyzed and processed by each branch controller to obtain the zero-sequence current amplitude and the zero-sequence power direction.
And 103, determining fault branches according to the zero sequence current and the zero sequence voltage of each branch.
Specifically, each branch controller may calculate a corresponding zero-sequence current amplitude and a corresponding zero-sequence power direction according to the zero-sequence current and the zero-sequence voltage of each branch, so as to determine the faulty line.
For example, the faulty line may be determined by a zero sequence current amplitude method. Optionally, the zero-sequence current of each branch may be compared with a current threshold respectively to determine a first determination result, and then, when the first determination result indicates that the zero-sequence current of any branch is greater than the current threshold, it is determined that any branch is a faulty branch.
It can be understood that, when a power supply system fails, the balance of the power grid is affected, and zero sequence voltage is further caused to generate zero sequence current, and the line with the fault can be determined by comparing different currents, that is, comparing the zero sequence current of each branch with a set current threshold value.
And step 104, controlling the fault branch to trip.
Specifically, after the fault line is determined, a tripping signal can be sent through the main controller to drive the relay corresponding to the fault branch to trip, so that the line is protected, the circuit fault is timely inhibited, and the accident is avoided.
In the embodiment of the disclosure, an insulation resistance value of a current power supply system is first obtained, then, under the condition that the insulation resistance value is smaller than a resistance threshold value, a zero sequence current and a zero sequence voltage of each branch circuit, which are respectively collected by each branch controller, are obtained, then, a fault branch circuit is determined according to the zero sequence current and the zero sequence voltage of each branch circuit, and finally, the fault branch circuit is controlled to trip. Therefore, potential safety hazards caused by faults of the master controller are effectively avoided, the safety of the underground power grid is further guaranteed, and the reliability and accuracy of electric leakage identification are improved.
Fig. 2 is a schematic flow chart of another mine underground leakage protection method provided according to an embodiment of the present disclosure.
As shown in fig. 2, the method for protecting leakage under a mine well may include the following steps:
It should be noted that each controller corresponds to a certain label, such as a main controller or a branch controller, and the controller corresponds to an operation status, such as faulty or normal.
Fig. 3 shows a diagram of an earth leakage protection system, as shown in fig. 3, there are 3 DSP branch controllers, which are respectively a DSP branch controller 1, a DSP branch controller 2, and a DSP branch controller 3, wherein, the external circuit of each branch controller is the same, and includes a zero sequence voltage sampling circuit, a zero sequence current sampling circuit and an insulation resistance continuous sampling circuit, a human-computer interaction module, and an execution mechanism unit, and a reset circuit, a BMS, a JTAG port, a crystal oscillator, a human-computer interaction module, and an execution mechanism unit are connected around the DSP general controller, and the general controller also corresponds to the ordered voltage sampling circuit, the zero sequence current sampling circuit, and the insulation resistance continuous sampling circuit.
It should be noted that, if the current corresponding controller type tag is the main controller and the operation state of the main controller is no fault, the insulation resistance value of the current power supply system may be further obtained. If the current corresponding controller type label is the main controller and the operation state of the main controller is faulty, any operation state is a non-fault state and the controller type label is the branch controller, and the controller type label is determined to be the main controller again, so that the insulation resistance value of the current power supply system is obtained.
It should be noted that, the specific implementation manner of step 202 may refer to the foregoing embodiments, and is not described herein again.
And 203, acquiring the zero sequence current and the zero sequence voltage of each branch circuit respectively acquired by each branch controller under the condition that the resistance value of the insulation resistor is smaller than the resistance threshold value.
Specifically, if the resistance value of the insulation resistor is smaller than the resistance value of the resistor, it is indicated that the current power supply system may be in a leakage state, and then the current/voltage signals are collected by the current/voltage transformer, and then the two signals are compared to determine whether a fault exists.
It should be noted that, for a specific implementation manner of step 203, reference may be made to the foregoing embodiments, which are not described herein again.
And 204, determining the zero sequence power direction corresponding to each branch according to the zero sequence current and the zero sequence voltage of each branch.
It should be noted that, in a normal condition, the ground capacitance currents in each branch are symmetrical, when a single-phase leakage fault occurs in any branch, zero-sequence currents pass through each branch, and the magnitude and direction of the zero-sequence currents of the fault branch are different from those of the non-fault branch.
Specifically, the zero-sequence power direction corresponding to each branch may be determined according to a relationship between the current zero-sequence voltage signal and the current zero-sequence current signal of each branch, which is not limited herein.
And step 205, determining a fault branch according to the zero sequence power direction corresponding to each branch.
Specifically, the zero-sequence current line before zero-sequence voltage hysteresis can be selected according to a zero-sequence power direction line selection judgment method, so as to determine the fault branch.
And step 206, controlling the fault branch to trip.
It should be noted that, the specific implementation manner of step 206 may refer to the foregoing embodiments, and is not described herein again.
In addition, the disclosure also provides an underground anti-interference design, and as the high-performance voltage stabilizing circuit is adopted, the output direct-current voltage has the characteristics of excellent stability and the like, and a three-terminal voltage stabilizing integrated circuit is adopted on each functional module. Because long distance transmission is carried out through the optical fiber, the optical fiber transmission device has the characteristics of high transmission speed and strong anti-interference capability. Optionally, during the short-distance signal transmission, a photoelectric coupler can be used for signal isolation to achieve the effect of suppressing spike pulse and noise interference.
In the embodiment of the disclosure, a currently corresponding controller type tag and an operating state are determined, then, under the condition that the currently corresponding controller type tag is a main controller and the operating state is a no-fault state, an insulation resistance value of a current power supply system is obtained, then, under the condition that the insulation resistance value is smaller than a resistance threshold value, a zero-sequence current and a zero-sequence voltage of each branch circuit, which are respectively collected by each branch controller, are obtained, a zero-sequence power direction corresponding to each branch circuit is determined according to the zero-sequence current and the zero-sequence voltage of each branch circuit, then, a fault branch circuit is determined according to the zero-sequence power direction corresponding to each branch circuit, and finally, tripping of the fault branch circuit is controlled. Therefore, the reliability of the leakage protection of the power supply system is obviously improved, certain selectivity is achieved, misjudgment and misjudgment of the leakage are effectively avoided, and the production safety of the coal mine is better guaranteed.
Fig. 4 shows a software flowchart of a mine underground earth leakage protection method, as shown in fig. 4, which shows a specific flow among the above steps.
Fig. 5 shows a flow chart of a branch controller, as shown in fig. 5, first reading zero sequence voltage and zero sequence current, then performing zero sequence current amplitude calculation and zero sequence power direction calculation to determine a fault branch, and sending corresponding data to a main controller.
In order to realize the embodiment, the disclosure further provides a mine underground leakage protection device.
Fig. 6 is a schematic structural diagram of an underground mine earth leakage protection device according to an embodiment of the disclosure.
As shown in fig. 6, the underground earth leakage protection device 600 includes a first obtaining module 610, a second obtaining module 620, a determining module 630 and a control module 640.
The first acquisition module is used for acquiring the insulation resistance value of the current power supply system;
the second obtaining module is used for obtaining the zero sequence current and the zero sequence voltage of each branch circuit respectively collected by each branch controller under the condition that the resistance value of the insulation resistor is smaller than the resistance threshold value;
the determining module is used for determining fault branches according to the zero sequence current and the zero sequence voltage of each branch;
and the control module is used for controlling the fault branch circuit to trip.
Optionally, the first obtaining module is specifically configured to:
and determining the resistance value of the insulation resistor of the power supply system according to the leakage current value in an additional direct-current power supply loop attached to the power supply system.
Optionally, the first obtaining module is further configured to:
and determining that the power supply system is in a current power-tight state under the condition that the resistance value of the insulation resistor is greater than or equal to the resistance threshold value.
Optionally, the determining module is specifically configured to:
comparing the zero sequence current of each branch with a current threshold value respectively to determine a first judgment result;
and determining any branch as a fault branch under the condition that the first judgment result is that the zero sequence current of any branch is greater than the current threshold.
Optionally, the determining module is specifically configured to:
determining a zero sequence power direction corresponding to each branch according to the zero sequence current and the zero sequence voltage of each branch;
and determining fault branches according to the zero sequence power direction corresponding to each branch.
Optionally, the control module is specifically configured to:
and driving the relay corresponding to the fault branch to trip.
Optionally, the first obtaining module is specifically configured to:
determining a current corresponding controller type label and an operation state;
and acquiring the insulation resistance value of the current power supply system under the condition that the current corresponding controller type label is the main controller and the running state is the fault-free state.
In the embodiment of the disclosure, an insulation resistance value of a current power supply system is first obtained, then, under the condition that the insulation resistance value is smaller than a resistance threshold value, a zero sequence current and a zero sequence voltage of each branch circuit, which are respectively collected by each branch controller, are obtained, then, a fault branch circuit is determined according to the zero sequence current and the zero sequence voltage of each branch circuit, and finally, the fault branch circuit is controlled to trip. Therefore, potential safety hazards caused by faults of the master controller are effectively avoided, the safety of the underground power grid is further guaranteed, and the reliability and accuracy of electric leakage identification are improved.
The present disclosure also provides an electronic device, a readable storage medium, and a computer program product according to embodiments of the present disclosure.
FIG. 7 illustrates a schematic block diagram of an example electronic device 700 that can be used to implement embodiments of the present disclosure. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be examples only, and are not meant to limit implementations of the disclosure described and/or claimed herein.
As shown in fig. 7, the device 700 comprises a computing unit 701, which may perform various suitable actions and processes according to a computer program stored in a Read Only Memory (ROM)702 or a computer program loaded from a storage unit 708 into a Random Access Memory (RAM) 703. In the RAM 703, various programs and data required for the operation of the device 700 can also be stored. The computing unit 701, the ROM 702, and the RAM 703 are connected to each other by a bus 704. An input/output (I/O) interface 705 is also connected to bus 704.
Various components in the device 700 are connected to the I/O interface 705, including: an input unit 706 such as a keyboard, a mouse, or the like; an output unit 707 such as various types of displays, speakers, and the like; a storage unit 708 such as a magnetic disk, optical disk, or the like; and a communication unit 709 such as a network card, modem, wireless communication transceiver, etc. The communication unit 709 allows the device 700 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, Field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
Program code for implementing the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowchart and/or block diagram to be performed. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), Wide Area Networks (WANs), the internet, and blockchain networks.
The computer system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The Server can be a cloud Server, also called a cloud computing Server or a cloud host, and is a host product in a cloud computing service system, so as to solve the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service ("Virtual Private Server", or simply "VPS"). The server may also be a server of a distributed system, or a server incorporating a blockchain.
In the embodiment of the disclosure, an insulation resistance value of a current power supply system is first obtained, then, under the condition that the insulation resistance value is smaller than a resistance threshold value, a zero sequence current and a zero sequence voltage of each branch circuit, which are respectively collected by each branch controller, are obtained, then, a fault branch circuit is determined according to the zero sequence current and the zero sequence voltage of each branch circuit, and finally, the fault branch circuit is controlled to trip. Therefore, potential safety hazards caused by faults of the master controller are effectively avoided, the safety of the underground power grid is further guaranteed, and the reliability and accuracy of electric leakage identification are improved.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present disclosure may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and the present disclosure is not limited herein.
The above detailed description should not be construed as limiting the scope of the disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the scope of protection of the present disclosure.
Claims (10)
1. A mine underground leakage protection method is characterized by comprising the following steps:
acquiring the insulation resistance value of the current power supply system;
under the condition that the resistance value of the insulation resistor is smaller than the resistance threshold value, acquiring zero sequence current and zero sequence voltage of each branch circuit, which are respectively acquired by each branch controller;
determining fault branches according to the zero sequence current and the zero sequence voltage of each branch;
and controlling the fault branch to trip.
2. The method according to claim 1, wherein the obtaining of the insulation resistance value of the current power supply system comprises:
and determining the resistance value of the insulation resistor of the power supply system according to the leakage current value in an additional direct-current power supply loop attached to the power supply system.
3. The method according to claim 1, wherein after obtaining the insulation resistance value of the current power supply system, the method further comprises:
and determining that the power supply system is in a current power-tight state under the condition that the resistance value of the insulation resistor is greater than or equal to the resistance threshold value.
4. The method of claim 1, wherein said determining a faulty branch based on the zero sequence current and the zero sequence voltage of each of said branches comprises:
comparing the zero sequence current of each branch with a current threshold value respectively to determine a first judgment result;
and determining any branch as a fault branch under the condition that the first judgment result is that the zero sequence current of any branch is greater than the current threshold.
5. The method of claim 1, wherein said determining a faulty branch based on the zero sequence current and the zero sequence voltage of each of said branches comprises:
determining a zero sequence power direction corresponding to each branch according to the zero sequence current and the zero sequence voltage of each branch;
and determining fault branches according to the zero sequence power direction corresponding to each branch.
6. The method of claim 1, wherein said controlling said faulty branch to trip comprises:
and driving the relay corresponding to the fault branch to trip.
7. The method according to claim 1, wherein the obtaining of the insulation resistance value of the current power supply system comprises:
determining a current corresponding controller type label and an operation state;
and acquiring the insulation resistance value of the current power supply system under the condition that the current corresponding controller type label is the main controller and the running state is the fault-free state.
8. A mine underground leakage protection device is characterized by comprising:
the first acquisition module is used for acquiring the insulation resistance value of the current power supply system;
the second obtaining module is used for obtaining the zero sequence current and the zero sequence voltage of each branch circuit respectively collected by each branch controller under the condition that the resistance value of the insulation resistor is smaller than the resistance threshold value;
the determining module is used for determining fault branches according to the zero sequence current and the zero sequence voltage of each branch;
and the control module is used for controlling the fault branch circuit to trip.
9. An electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-7.
10. A non-transitory computer readable storage medium having stored thereon computer instructions for causing the computer to perform the method of any one of claims 1-7.
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