A method, system, device and medium for phase comparison of circuits

Abstract

This invention discloses a method, system, device, and medium for phase verification of power transmission lines. When the transmission line under test is connected to a preset phase verification test device, the induced voltage corresponding to each phase line within the transmission line under test is obtained. When the number of induced voltages equals a preset voltage quantity threshold, the first target insulation resistance corresponding to the phase line is obtained. Based on the first target insulation resistance, the phase sequence of the corresponding phase lines is checked to determine the corresponding line phase and the number of phases is counted in real time. When the number of phases equals a preset phase quantity threshold, a phase verification data table corresponding to the transmission line under test is constructed using all existing line phases. The method only requires connecting the transmission line under test to the phase verification test device before testing begins; during the test, there is no need to disconnect or reconnect the transmission line under test. The phase verification test device automatically switches between different phase tests, improving work efficiency.

Description

Technical Field

[0001] This invention relates to the field of line phase matching technology, and in particular to a line phase matching method, system, device and medium. Background Technology

[0002] Line phase verification is one of the important testing items before AC transmission line parameter testing. It is the foundation for ensuring the correct operation of reactive power compensation devices in the station and ensuring the safe operation of the power system.

[0003] Line phase verification is usually performed by operators who connect the measuring device to one of the three phases A, B, and C of the line under test, and measure the three phases A, B, and C in turn by manually connecting the wires, and manually select the test items and the phases to be measured.

[0004] Existing methods for phase verification involve manual disconnection and reconnection multiple times, which carries a high risk of electric shock, is inefficient, and the random selection of phases for measurement can easily lead to incomplete or repeated measurements, resulting in low accuracy of the measurement results. Summary of the Invention

[0005] This invention provides a method, system, device, and medium for phase verification of circuits, which solves the technical problems of existing phase verification methods that involve multiple manual disconnections and reconnections, resulting in a high risk of electric shock, low work efficiency, and incomplete or repeated measurements due to random selection of phases, leading to low accuracy of measurement results.

[0006] This invention provides a method for phase comparison of circuits, comprising:

[0007] When the transmission line under test is connected to the preset phase comparison test device, the induced voltage corresponding to each phase line in the transmission line under test is obtained;

[0008] When the number of voltages corresponding to the induced voltage is equal to a preset voltage number threshold, the first target insulation resistance corresponding to the phase line is obtained;

[0009] Based on the first target insulation resistance, the phase sequence of the corresponding phase line is checked to determine the line phase corresponding to the phase line and the number of phases is counted in real time.

[0010] When the number of phases is equal to the preset phase number threshold, all existing line phases are used to construct the phase data table corresponding to the transmission line under test.

[0011] Optionally, the preset phase-crossing test device includes an induced voltage detection module; the step of obtaining the induced voltage corresponding to each phase line in the transmission line under test includes:

[0012] The voltage analog signal corresponding to the phase line is acquired sequentially by the induced voltage detection module;

[0013] The analog voltage signal is converted into a digital signal to generate the induced voltage corresponding to the phase line.

[0014] Optionally, the preset phase test device includes an insulation resistance detection module; the step of obtaining the first target insulation resistance corresponding to the phase line when the number of voltages corresponding to the induced voltage is equal to a preset voltage number threshold includes:

[0015] When the number of voltages corresponding to the induced voltage is equal to the preset voltage number threshold, the insulation resistance detection module inputs a first test voltage to the phase line to obtain the corresponding first leakage current.

[0016] Using the first leakage current and the first test voltage, calculate the first initial insulation resistance corresponding to the phase line;

[0017] The first target insulation resistance corresponding to the phase line is determined based on the first initial insulation resistance and the preset resistance threshold.

[0018] Optionally, the step of determining the first target insulation resistance corresponding to the phase line based on the first initial insulation resistance and a preset resistance threshold includes:

[0019] The phase line is grounded and discharged, and the first initial insulation resistance is updated to the first intermediate insulation resistance;

[0020] Determine whether the first intermediate insulation resistance meets the preset resistance threshold;

[0021] If so, the initial insulation resistance corresponding to the first intermediate insulation resistance shall be taken as the first target insulation resistance corresponding to the phase line;

[0022] If not, then perform a circuit check on the phase line and jump to execute the step of inputting a first test voltage to the phase line through the insulation resistance detection module to obtain the corresponding first leakage current, until the first intermediate insulation resistance meets the resistance threshold.

[0023] Optionally, the preset phase sequence testing device includes a phase sequence verification and detection module; the step of performing phase sequence verification on the corresponding phase lines based on the first target insulation resistance, determining the line phase corresponding to the phase line, and counting the number of phases in real time includes:

[0024] The phase sequence verification module inputs a second test voltage to the phase line to obtain the corresponding second leakage current.

[0025] Using the second leakage current and the second test voltage, calculate the second initial insulation resistance corresponding to the phase line;

[0026] Based on the second initial insulation resistance and the first target insulation resistance, the line phase corresponding to the phase line is determined and the number of phases is counted in real time.

[0027] Optionally, the step of determining the line phase corresponding to the phase line and counting the number of phases in real time based on the second initial insulation resistance and the first target insulation resistance includes:

[0028] Determine whether the second initial insulation resistance meets the preset phase threshold;

[0029] If so, the second initial insulation resistance shall be taken as the second target insulation resistance corresponding to the phase line;

[0030] Based on the second target insulation resistance and the first target insulation resistance, the line phase corresponding to the phase line is determined and the number of phases is counted in real time.

[0031] If not, perform a line check on the phase line and jump to the step of inputting a second test voltage to the phase line through the phase sequence verification module to obtain the corresponding second leakage current, until the second initial insulation resistance meets the phase verification threshold.

[0032] Optionally, the step of constructing a phase data table corresponding to the transmission line under test using all existing line phases when the number of phases equals a preset phase number threshold includes:

[0033] Determine whether the number of phases is equal to a preset phase number threshold;

[0034] If so, construct a phase data table corresponding to the transmission line under test using all the existing line phases;

[0035] If not, proceed to the step of obtaining the first target insulation resistance corresponding to the phase line until the number of phases equals the number threshold.

[0036] The present invention also provides a circuit phase matching system, comprising:

[0037] The induced voltage acquisition module is used to acquire the induced voltage corresponding to each phase line in the transmission line under test when the transmission line under test is connected to a preset phase test device.

[0038] The first target insulation resistance acquisition module is used to acquire the first target insulation resistance corresponding to the phase line when the number of voltages corresponding to the induced voltage is equal to a preset voltage number threshold.

[0039] The line phase and phase quantity determination module is used to perform phase sequence verification on the corresponding phase line based on the first target insulation resistance, determine the line phase corresponding to the phase line and count the phase quantity in real time.

[0040] The phase data table construction module is used to construct the phase data table corresponding to the transmission line under test by using all existing line phases when the number of phases is equal to a preset phase number threshold.

[0041] The present invention also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of implementing any of the circuit phase matching methods described above.

[0042] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed, implements any of the circuit phase matching methods described above.

[0043] As can be seen from the above technical solutions, the present invention has the following advantages:

[0044] This invention obtains the induced voltage corresponding to each phase line of the transmission line under test when it is connected to a preset phase comparison test device. When the number of induced voltages equals a preset voltage number threshold, the first target insulation resistance of the phase line is obtained. Based on the first target insulation resistance, the phase sequence of the corresponding phase lines is checked to determine the line phase and the number of phases is counted in real time. When the number of phases equals a preset phase number threshold, a phase comparison data table corresponding to the transmission line under test is constructed using all existing line phases. This invention solves the technical problems of existing line phase comparison methods, which involve multiple manual disconnections and reconnections, resulting in high risk of electric shock, low work efficiency, and incomplete or repeated measurements due to random manual phase selection, leading to low accuracy. The invention only requires connecting the transmission line under test to the phase comparison test device before testing; during the test, there is no need to disconnect or reconnect the transmission line under test. The phase comparison test device automatically switches between different phase tests, improving work efficiency. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a flowchart of the steps of a line phase comparison method provided in Embodiment 1 of the present invention;

[0047] Figure 2 This is a schematic diagram of the nuclear phase testing apparatus in Embodiment 1 of the present invention;

[0048] Figure 3 This is a flowchart of the steps of a line phase comparison method provided in Embodiment 2 of the present invention;

[0049] Figure 4 This is a schematic diagram of the structure of the induced voltage detection module in Embodiment 2 of the present invention for measuring the induced voltage of the transmission line under test;

[0050] Figure 5 This is a schematic diagram of the insulation resistance / phase sequence verification and detection module for measuring the insulation resistance of the transmission line under test in Embodiment 2 of the present invention;

[0051] Figure 6 This is the primary electrical wiring diagram of the nuclear phase testing device in Embodiment 2 of the present invention;

[0052] Figure 7 This is a schematic diagram of the discharge structure of the protection control module in Embodiment 2 of the present invention;

[0053] Figure 8 This is a structural block diagram of a line phase matching system provided in Embodiment 3 of the present invention. Detailed Implementation

[0054] This invention provides a method, system, device, and medium for phase verification of power lines, which addresses the technical problems of existing phase verification methods that involve multiple manual disconnections and reconnections, resulting in a high risk of electric shock, low work efficiency, and incomplete or repeated measurements due to random selection of phases, leading to low accuracy of measurement results.

[0055] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0056] Please see Figure 1 , Figure 1 This is a flowchart of a line phase comparison method provided in Embodiment 1 of the present invention.

[0057] This invention provides a method for phase comparison of circuits, comprising:

[0058] Step 101: When the transmission line under test is connected to the preset phase comparison test device, obtain the induced voltage corresponding to each phase line in the transmission line under test.

[0059] The transmission line under test includes phase A, phase B, and phase C. The pre-set phase verification test device includes a central controller module, a power supply module, a test wiring module, a phase selection module, an induced voltage detection module, an insulation resistance detection module, a phase sequence verification module, a protection control module, a human-machine interface module, and a communication module.

[0060] like Figure 2 As shown, the central controller module is the control unit of the device, containing a microcomputer-controlled voltage source, primarily controlled in real-time by a microcomputer processor. Based on the relevant information collected during the test by the phase selection module, induced voltage detection module, insulation resistance detection module, and phase sequence verification detection module, it automatically controls and completes the induced voltage, insulation resistance, and phase sequence verification detection of each phase of the high-voltage transmission line (i.e., the transmission line under test). The power supply module is the main power supply unit of the device. It provides the central controller module with AC 220V 50Hz power. The test wiring module is the main connection unit between the device and the outside world. The three phases A, B, and C of the high-voltage transmission line are connected to the test wiring module of the device through test leads, realizing the electrical connection between the device and the high-voltage line under test. The phase selection module is the execution unit for controlling the on / off of the corresponding phases. Based on the requirements for measuring the induced voltage, insulation resistance, and phase sequence verification of the line, the central controller module controls the on / off of the phase selection module to determine whether the A-phase, B-phase, or C-phase line of the high-voltage transmission line is connected to the current detection circuit.

[0061] The induced voltage detection module is a unit in the phase-comparison testing device used to detect the induced voltage parameters of transmission lines. Taking the detection of the induced voltage of phase A of the transmission line under test as an example, the central controller module controls the phase selection module to connect phase A and disconnect phases B and C, connecting phase A to the current detection circuit. The induced voltage detection module acquires the voltage signal of phase A in real time, thus measuring the induced voltage of phase A. The induced voltage measurements of phases B and C are then performed sequentially using the same method.

[0062] The insulation resistance detection module is a unit in the phase comparison test device used to detect the insulation resistance parameter of transmission lines. After the induced voltage of the transmission line under test is detected, the phase comparison test device automatically enters the insulation resistance detection program. Taking the detection of the insulation resistance of phase A as an example, the central controller module controls the phase selection module to connect phase A and disconnect phases B and C, connecting phase A to the current detection circuit. The insulation resistance detection module starts the program to measure the insulation resistance of phase A, and automatically grounds it after the test is completed. The insulation resistance of phases B and C is measured sequentially using the same method.

[0063] The phase sequence verification module is a unit in the phase sequence testing device used to verify the correctness of the phase identification of the transmission line under test. Taking the detection of the phase identification of phase A as an example, the ends of phases B and C are grounded, and phase A is left open. If the insulation resistance is not zero, it is preliminarily determined that the phase identification markings at both ends of phase A are consistent. After discharging phase A by grounding and confirming that the end of phase A is grounded, the insulation resistance of phase A is measured again. If the insulation resistance is zero at this time, it can be determined that the phase identification markings at both ends of phase A are consistent. The same method is used to complete the phase identification verification of phases B and C in sequence.

[0064] The protection and control module is the unit used to perform grounding discharge on the transmission line under test. Taking the grounding discharge of phase A as an example, the central controller module controls the phase selection module to connect phase A, thus connecting phase A to the protection and control module, thereby performing grounding discharge on phase A. The same method can be used to complete the grounding discharge of phases B and C. The human-machine interface module is the unit for setting parameters and controlling the program of the phase verification test device. It includes a keyboard, display, and conversion interface, displaying the test process nodes and data of the phase verification test device in real time. The data communication module is the unit for data communication between the various modules of the phase verification test device and the central controller module. This includes receiving and sending programs, instructions, and data.

[0065] In this embodiment of the invention, the A-phase, B-phase, and C-phase lines of the transmission line under test are simultaneously connected to the phase comparison test device. During the test, no wiring changes are required for different test items or phases, reducing the frequency of workers' contact with transmission lines containing induced voltage and lowering the risk of electric shock. When the transmission line under test is connected to the preset phase comparison test device, the induced voltage detection module of the phase comparison test device sequentially acquires the analog voltage signals corresponding to the phase lines, converts the analog voltage signals into digital signals, and generates the induced voltage corresponding to the phase lines.

[0066] Step 102: When the number of voltages corresponding to the induced voltage is equal to the preset voltage number threshold, obtain the first target insulation resistance corresponding to the phase line.

[0067] The preset voltage quantity threshold refers to the critical value that the quantity of voltages corresponding to the induced voltage must meet. Since the transmission line under test includes three phase lines: A-phase, B-phase, and C-phase, the voltage quantity threshold is usually set to 3.

[0068] In this embodiment of the invention, when the number of voltages corresponding to the induced voltage equals a preset voltage number threshold, a first test voltage is input to the phase line through the insulation resistance detection module to obtain the corresponding first leakage current. Using the first leakage current and the first test voltage, the first initial insulation resistance corresponding to the phase line is calculated, and based on the first initial insulation resistance and the preset resistance threshold, the first target insulation resistance corresponding to the phase line is determined.

[0069] Step 103: Based on the first target insulation resistance, check the phase sequence of the corresponding phase line, determine the line phase corresponding to the phase line, and count the number of phases in real time.

[0070] In this embodiment of the invention, when the number of voltages corresponding to the induced voltage equals a preset voltage number threshold, a second test voltage is input to the phase line through the phase sequence verification module to obtain the corresponding second leakage current. Using the second leakage current and the second test voltage, the second initial insulation resistance corresponding to the phase line is calculated. Based on the second initial insulation resistance and the first target insulation resistance, the line phase corresponding to the phase line is determined and the number of phases is counted in real time.

[0071] Step 104: When the number of phases is equal to the preset phase number threshold, use all existing line phases to construct the phase data table corresponding to the transmission line under test.

[0072] In this embodiment of the invention, it is determined whether the number of phases is equal to a preset phase number threshold. If so, a phase data table corresponding to the transmission line under test is constructed using all existing line phases. If not, the process jumps to the step of obtaining the first target insulation resistance corresponding to the phase line until the number of phases equals the number threshold.

[0073] In this embodiment of the invention, when the transmission line under test is connected to a preset phase comparison test device, the induced voltage corresponding to each phase line in the transmission line under test is obtained. When the number of voltages corresponding to the induced voltages equals a preset voltage number threshold, the first target insulation resistance corresponding to the phase line is obtained. Based on the first target insulation resistance, the phase sequence of the corresponding phase lines is checked to determine the line phase corresponding to the phase line and the number of phases is counted in real time. When the number of phases equals a preset phase number threshold, a phase comparison data table corresponding to the transmission line under test is constructed using all existing line phases. This solves the technical problems of existing line phase comparison methods, which involve multiple manual disconnection and reconnection, resulting in high risk of electric shock, low work efficiency, and incomplete or repeated measurements due to random manual selection of phases, leading to low accuracy of measurement results. The new method only requires connecting the transmission line under test to the phase comparison test device before testing begins. During the test, there is no need to disconnect or reconnect the transmission line under test. The phase comparison test device automatically switches between different phase tests, improving work efficiency.

[0074] Please see Figure 3 , Figure 3 This is a flowchart of a line phase comparison method provided in Embodiment 2 of the present invention.

[0075] Step 301: When the transmission line under test is connected to the preset phase comparison test device, the induced voltage corresponding to each phase line in the transmission line under test is obtained.

[0076] Furthermore, the pre-designed nuclear phase test apparatus includes an induced voltage detection module, and step 301 may include the following sub-steps S11-S12:

[0077] S11. The voltage analog signals corresponding to the phase lines are obtained sequentially through the induced voltage detection module.

[0078] S12. Convert the analog voltage signal into a digital signal to generate the induced voltage corresponding to the phase line.

[0079] In this embodiment of the invention, the transmission line under test is connected to a preset phase-comparison test device, that is, the A-phase, B-phase, and C-phase lines of the transmission line under test are connected to the preset phase-comparison test device. The induced voltage detection module of the phase-comparison test device sequentially acquires the analog voltage signals corresponding to the A-phase, B-phase, and C-phase lines, and converts the analog voltage signals into digital signals to generate the induced voltage corresponding to the phase lines. For example... Figure 4 As shown, VT is connected in series in the three-phase circuit of phase A, phase B, and phase C respectively. A1 VT B1 VT C1 The thyristor switch is controlled by the central controller module to switch on and off, and to obtain the induced voltage U corresponding to phase A line. A The induced voltage U corresponding to phase B line B U corresponding to phase C C When measuring the induced voltage of phase A, the central controller module drives VT. A1 When the circuit is turned on, the induced voltage detection module measures the induced voltage of phase A and sends the measured induced voltage data to the central controller module. The induced voltage detection module also includes an A / D converter, which converts the detected analog voltage signal into a digital signal before sending it to the central controller module for storage. The induced voltage measurements of phase B and phase C can be performed sequentially using the same method.

[0080] Step 302: When the number of voltages corresponding to the induced voltage is equal to the preset voltage number threshold, obtain the first target insulation resistance corresponding to the phase line.

[0081] Furthermore, the pre-designed phase-matching test apparatus includes an insulation resistance detection module, and step 302 may include the following sub-steps S21-S23:

[0082] S21. When the number of voltages corresponding to the induced voltage is equal to the preset voltage number threshold, the first test voltage is input to the phase line through the insulation resistance detection module to obtain the corresponding first leakage current.

[0083] S22. Using the first leakage current and the first test voltage, calculate the first initial insulation resistance corresponding to the phase line.

[0084] S23. Determine the first target insulation resistance corresponding to the phase line based on the first initial insulation resistance and the preset resistance threshold.

[0085] The preset voltage quantity threshold is a critical value used to verify whether all induced voltages corresponding to the transmission line under test have been obtained. Since the transmission line under test has three phases, the voltage quantity threshold is usually set to 3.

[0086] The first test voltage refers to the preset voltage input to the corresponding phase line of the transmission line under test through the insulation resistance detection module, thereby obtaining the corresponding leakage current.

[0087] The preset resistance threshold is used to verify whether the phase line has successfully discharged to the ground. The resistance threshold is usually set to 0.

[0088] In this embodiment of the invention, when the induced voltages corresponding to phase A, phase B, and phase C of the transmission line under test are obtained, the insulation resistance detection module of the phase comparison test device sequentially inputs a first test voltage to phase A, phase B, and phase C to obtain the corresponding first leakage current. The remainder between the first test voltage and the first leakage current is calculated to determine the first initial insulation resistance corresponding to that phase line. Based on the first initial insulation resistance and a preset resistance threshold, the first target insulation resistance corresponding to that phase line is determined.

[0089] Furthermore, step S23 may include the following sub-steps S231-S234:

[0090] S231. Discharge the phase line to ground, and update the first initial insulation resistance to the first intermediate insulation resistance.

[0091] S232. Determine whether the first intermediate insulation resistance meets the preset resistance threshold.

[0092] S233. If so, the initial insulation resistance corresponding to the first intermediate insulation resistance shall be taken as the first target insulation resistance corresponding to the phase line.

[0093] S234. If not, perform a line check on the phase line and jump to execute the step of inputting the first test voltage to the phase line through the insulation resistance detection module to obtain the corresponding first leakage current until the first intermediate insulation resistance meets the resistance threshold.

[0094] In this embodiment of the invention, after obtaining the first initial insulation resistance corresponding to the phase line, the phase line is grounded and discharged. The first initial insulation resistance is updated to the first intermediate insulation resistance, which should be zero at this time. It is determined whether the first intermediate insulation resistance meets a preset resistance threshold, i.e., whether the first intermediate insulation resistance is 0. When the first intermediate insulation resistance is 0, it indicates that the phase line is normal, and the initial insulation resistance corresponding to the first intermediate insulation resistance is taken as the first target insulation resistance for the phase line. When the first intermediate insulation resistance is not zero, it indicates that there is an abnormality in the line, and an alarm signal is issued, reminding the user to check the line condition. After checking the phase line, a first test voltage is re-inputted to the phase line to obtain the corresponding first leakage current, and the corresponding first initial insulation resistance is calculated until the first intermediate insulation resistance obtained after grounding discharge meets the resistance threshold.

[0095] Step 303: Based on the first target insulation resistance, check the phase sequence of the corresponding phase line, determine the line phase corresponding to the phase line, and count the number of phases in real time.

[0096] Furthermore, the pre-designed nuclear phase test apparatus includes a phase sequence verification and detection module, and step 303 may include the following sub-steps S31-S33:

[0097] S31. Input the second test voltage to the phase line through the phase sequence verification module to obtain the corresponding second leakage current.

[0098] S32. Using the second leakage current and the second test voltage, calculate the second initial insulation resistance corresponding to the phase line.

[0099] S33. Based on the second initial insulation resistance and the first target insulation resistance, determine the line phase corresponding to the phase line and count the number of phases in real time.

[0100] In this embodiment of the invention, the second test voltage refers to the voltage obtained by grounding the phase line. For example... Figure 5 As shown, VT is connected in series in phases A, B, and C respectively. A2 VT B2 VT C2 The central controller module controls its on / off state, while the insulation resistance / phase sequence verification and detection module performs insulation resistance detection and phase sequence verification respectively.

[0101] (1) When measuring the first initial insulation resistance of phase A, the ends of phase B and phase C are grounded, phase A is open-circuited, and the central controller module drives VT. A2When the circuit is turned on, the insulation resistance detection module outputs a first test voltage to phase A and simultaneously detects the first leakage current of phase A. This allows the initial insulation resistance of phase A to be calculated, and the data is transmitted to the central controller module. Based on the initial insulation resistance and a preset resistance threshold, the first target insulation resistance of phase A is determined. The same method can be used to measure the first target insulation resistance of phases B and C sequentially.

[0102] (2) When performing phase sequence verification on phase A, as described in (1) above, the first target insulation resistance test is completed when phase A is open-circuited. If the first target insulation resistance of phase A is not zero at this time, it is preliminarily determined that the phase identification at both ends of phase A is consistent. By inputting the second test voltage to phase A through the phase sequence verification module, it is verified whether the end of phase A is grounded, the corresponding second leakage current is obtained, the remainder between the second test voltage and the second leakage current is calculated, and the second initial insulation resistance corresponding to the phase line is obtained. The second initial insulation resistance is compared with the preset phase verification threshold to determine whether the second initial insulation resistance is 0, and the corresponding second target insulation resistance is obtained. When the second target insulation resistance is different from the first target insulation resistance, i.e., the second target insulation resistance is 0, and the first target insulation resistance is not 0, it can be determined that the phase identification at both ends of phase A is consistent. The phase sequence verification of phase B and phase C can be completed in the same way.

[0103] Furthermore, step S33 may include the following sub-steps S331-S334:

[0104] S331. Determine whether the second initial insulation resistance meets the preset phase threshold.

[0105] S332. If so, the second initial insulation resistance shall be taken as the second target insulation resistance corresponding to the phase line.

[0106] S333. Based on the second target insulation resistance and the first target insulation resistance, determine the line phase corresponding to the phase line and count the number of phases in real time.

[0107] S334. If not, perform a line check on the phase line and jump to execute the step of inputting the second test voltage to the phase line through the phase sequence verification module to obtain the corresponding second leakage current until the second initial insulation resistance meets the phase verification threshold.

[0108] In this embodiment of the invention, a preset phase threshold is used to verify whether the phase line is successfully grounded, i.e., to verify whether the second initial insulation resistance is zero. The number of phases refers to the number of lines that have been successfully verified. It is determined whether the second initial insulation resistance meets the preset phase threshold. If it does, it indicates that the line is successfully grounded, and the second initial insulation resistance is zero. This second initial insulation resistance is then used as the second target insulation resistance corresponding to the phase line. Since the second target insulation resistance is different from the first target insulation resistance, the line phase corresponding to the phase line can be determined, and the number of phases can be counted in real time. If it does not meet the threshold, it indicates that a line fault has occurred, and the line needs to be inspected. The corresponding second initial insulation resistance is then re-acquired until the second initial insulation resistance meets the phase threshold.

[0109] like Figure 6 As shown, the electrical primary wiring circuit diagram corresponding to the phase verification test device mainly consists of three parts: a module for measuring the induced voltage of the transmission line under test, a module for measuring insulation resistance / phase identification verification, and a protection and control module.

[0110] In the module for measuring the induced voltage of a line, the thyristor switch VT A1 VT B1 VT C1 As a crucial component of the branch control module, its primary function is to control the opening and closing of the branch. When measuring the induced voltage on phase A, the thyristor switch VT... A1 On, VT B1 VT C1 When the circuit is in the off state, a resistive-capacitive voltage divider connected to phase A can be used to measure the induced voltage on phase A. The induced voltage on phases B and C can be measured using the same method.

[0111] Insulation resistance measurement / phase identification module, also compatible with VT SCR switch. A2 VT B2 VT C2 As a crucial component of the branch control module, its primary function is to control the opening and closing of the branch. When measuring the insulation resistance of phase A, the thyristor switch VT... A2 On, VT B2 VT C2 When in the off state, the phase-to-phase test device applies a DC voltage U to phase A, and the ammeter PA detects the leakage current of phase A, thereby calculating the first target insulation resistance value corresponding to phase A. During phase sequence verification, if phase A is grounded and the insulation resistance of phase A is zero, it can be determined that the phase identification at both ends of phase A is consistent. Using the same method, insulation resistance / phase identification verification for phases B and C can be performed separately.

[0112] like Figure 6 and Figure 7As shown, the protection control module also includes a silicon controlled rectifier (SCR) switch VT. A3 VT B3 VT C3 As a crucial component of the branch control module, its primary function is to control the opening and closing of the branch. When measuring induced voltage, insulation resistance, and phase identification, the thyristor switch VT on the protection control module circuit... A3 VT B3 VT C3 In the normally open state; when the initial insulation resistance measurement of a phase is completed and grounding discharge is required, or for safety reasons, when all three phases of the line need to be grounded simultaneously, the central controller module drives the thyristor switch to simultaneously conduct one or all three phases, connecting the line to the discharge circuit. One or all three phases of the measured line are grounded through the discharge resistor, thereby achieving grounding discharge. When grounding discharge is required for phase A, the thyristor switch VT... A1 On, VT B1 VT C1 When the circuit is in the off state, discharge resistor R3 is connected in series with phase A to discharge it. Using the same method, phase B and phase C can be grounded and discharged respectively.

[0113] Step 304: Determine whether the number of phases is equal to the preset threshold number of phases.

[0114] In this embodiment of the invention, the preset phase number threshold refers to whether to obtain the phase sequence verification of all phase lines corresponding to the transmission line under test. The transmission line under test has three phases, therefore, the phase number threshold is usually set to 3. The number of phases is compared with the preset phase number threshold.

[0115] Step 305: If so, construct a phase data table corresponding to the transmission line under test using all existing line phases.

[0116] In this embodiment of the invention, the line phase includes the induced voltage, insulation resistance, and phase verification results corresponding to each phase line. When the number of phases equals a preset phase number threshold, it indicates that the phase verification of all phase lines corresponding to the transmission line under test has been completed, and the line phase corresponding to each phase line is obtained. This is different from constructing a phase verification data table corresponding to the transmission line under test using all line phases, and automatically printing the phase verification data table through the phase verification test device.

[0117] Step 306: If not, proceed to the step of obtaining the first target insulation resistance corresponding to the phase line until the number of phases equals the number threshold.

[0118] In this embodiment of the invention, when the number of phases is not equal to the preset phase number threshold, it indicates that all phases of the transmission line under test have not yet been phase-checked. Therefore, the step of obtaining the first target insulation resistance of the phase line is executed until the number of phases equals the number threshold.

[0119] In this embodiment of the invention, step one is to initialize the voltage quantity i = 0, the phase quantity j = 0, and the phase line not grounded k = 0 when the transmission line under test is connected to the preset phase test device.

[0120] Step 2: Increment i by 1 (i = 1, 2, 3, where i = 1 represents the tested line is phase A, i = 2 represents the tested line is phase B, and i = 3 represents the tested line is phase C).

[0121] Step 3: Collect the induced voltage corresponding to phase i of the line through the induced voltage detection module;

[0122] Step 4: Determine if i equals 3; if i equals 3, proceed to Step 5; if i does not equal 3, jump to Step 2.

[0123] Step 5: Increment j by 1 (j = 1, 2, 3, where j = 1 represents the tested line is phase A, j = 2 represents the tested line is phase B, and j = 3 represents the tested line is phase C).

[0124] Step 6: Input the first test voltage to phase j of the line through the insulation resistance detection module, and collect the first leakage circuit of phase j of the line (k=0, representing the case where the line is not grounded);

[0125] Step 7: Calculate the initial insulation resistance of phase j of the line;

[0126] Step 8: Discharge the j-phase ground of the line, and update the first initial insulation resistance to the first intermediate insulation resistance;

[0127] Step 9: Determine whether the first intermediate insulation resistance corresponding to line j is equal to 0, i.e., whether the preset resistance threshold is met; when the first intermediate insulation resistance is not equal to 0, the line is abnormal, an alarm signal is issued, reminding that the line condition needs to be checked, and proceed to step 10; when the first intermediate insulation resistance is equal to 0, take the initial insulation resistance corresponding to the first intermediate insulation resistance as the first target insulation resistance corresponding to the phase line and proceed to step 11.

[0128] Step 10: Determine if the line abnormality has been resolved; if not, return to step 9; if resolved, return to step 6.

[0129] Step 11: Increment k by 1 (k = 1, representing the case of line grounding), input the second test voltage to the phase line through the phase sequence verification module, and collect the second leakage current corresponding to line j. The second leakage current is 0.

[0130] Step 12: Calculate the second initial insulation resistance of phase j of the line using the second leakage current and the second test voltage;

[0131] Step 13: Discharge the j-phase of the line to ground and determine whether the second initial insulation resistance meets the preset phase threshold, i.e., determine whether the second initial insulation resistance of the j-phase of the line is equal to 0; if the line is abnormal, issue an alarm signal to remind that the line condition needs to be checked, and proceed to step 14; when the first intermediate insulation resistance is equal to 0, take the initial insulation resistance corresponding to the first intermediate insulation resistance as the first target insulation resistance corresponding to the phase line and proceed to step 15.

[0132] Step Fourteen: Determine if the line abnormality has been resolved; if not, return to Step Thirteen; if resolved, return to Step Eleven.

[0133] Step 15: Decrement k by 1 (to prepare for the next phase test of the line);

[0134] Step 16: Determine if j equals 3; if j equals 3, it means all three phases have been tested, proceed to Step 17; if j does not equal 3, it means the three phases have not been tested, return to Step 5.

[0135] Step 17: End. The phase verification test for the line is now complete.

[0136] Please see Figure 8 , Figure 8 This is a structural block diagram of a line phase matching system provided in Embodiment 3 of the present invention.

[0137] This invention provides a line phase comparison system, comprising:

[0138] The induced voltage acquisition module 801 is used to acquire the induced voltage corresponding to each phase line in the transmission line under test when the transmission line under test is connected to a preset phase test device.

[0139] The first target insulation resistance acquisition module 802 is used to acquire the first target insulation resistance corresponding to the phase line when the voltage quantity corresponding to the induced voltage is equal to the preset voltage quantity threshold.

[0140] The line phase and phase quantity determination module 803 is used to check the phase sequence of the corresponding phase line based on the first target insulation resistance, determine the line phase corresponding to the phase line, and count the phase quantity in real time.

[0141] The phase data table construction module 804 is used to construct the phase data table corresponding to the transmission line under test by using all existing line phases when the number of phases is equal to the preset phase number threshold.

[0142] Optionally, the preset nuclear phase test device includes an induced voltage detection module, and the induced voltage acquisition module 801 includes:

[0143] The voltage analog signal acquisition module is used to sequentially acquire the voltage analog signals corresponding to the phase lines through the induced voltage detection module.

[0144] The induced voltage acquisition submodule is used to convert the analog voltage signal into a digital signal and generate the induced voltage corresponding to the phase line.

[0145] Optionally, the preset phase test device includes an insulation resistance detection module, and the first target insulation resistance acquisition module 802 includes:

[0146] The first leakage current acquisition module is used to acquire the corresponding first leakage current by inputting a first test voltage to the phase line through the insulation resistance detection module when the voltage quantity corresponding to the induced voltage is equal to the preset voltage quantity threshold.

[0147] The first initial insulation resistance calculation module is used to calculate the first initial insulation resistance corresponding to the phase line using the first leakage current and the first test voltage.

[0148] The first target insulation resistance acquisition submodule is used to determine the first target insulation resistance corresponding to the phase line based on the first initial insulation resistance and the preset resistance threshold.

[0149] Optionally, the first target insulation resistance acquisition submodule may perform the following steps:

[0150] Discharge the phase line to ground, and the first initial insulation resistance is updated to the first intermediate insulation resistance;

[0151] Determine whether the first intermediate insulation resistance meets the preset resistance threshold;

[0152] If so, the initial insulation resistance corresponding to the first intermediate insulation resistance shall be taken as the first target insulation resistance corresponding to the phase line;

[0153] If not, perform a circuit check on the phase line and jump to execute the step of inputting the first test voltage to the phase line through the insulation resistance detection module to obtain the corresponding first leakage current, until the first intermediate insulation resistance meets the resistance threshold.

[0154] Optionally, the preset phase sequence testing device includes a phase sequence verification and detection module, and the line phase identification and phase quantity determination module 803 includes:

[0155] The second leakage current acquisition module is used to input a second test voltage to the phase line through the phase sequence verification module to acquire the corresponding second leakage current.

[0156] The second initial insulation resistance calculation module is used to calculate the second initial insulation resistance corresponding to the phase line using the second leakage current and the second test voltage.

[0157] The line phase and phase quantity determination submodule is used to determine the line phase corresponding to the phase line and count the phase quantity in real time based on the second initial insulation resistance and the first target insulation resistance.

[0158] Optionally, the line phase and phase quantity determination submodule can perform the following steps:

[0159] Determine whether the second initial insulation resistance meets the preset phase threshold.

[0160] If so, the second initial insulation resistance shall be taken as the second target insulation resistance corresponding to the phase line;

[0161] Based on the second target insulation resistance and the first target insulation resistance, determine the line phase corresponding to the phase line and count the number of phases in real time;

[0162] If not, perform a line check on the phase line and jump to execute the step of inputting the second test voltage to the phase line through the phase sequence verification module to obtain the corresponding second leakage current until the second initial insulation resistance meets the phase verification threshold.

[0163] Optionally, the nucleus data table construction module 804 includes:

[0164] The phase count determination module is used to determine whether the phase count is equal to the preset phase count threshold.

[0165] The first submodule for constructing the phase data table is used to construct the phase data table corresponding to the transmission line under test by using all existing line phases if the condition is met.

[0166] The second submodule for constructing the phase data table is used to, if not, jump to the step of obtaining the first target insulation resistance corresponding to the phase line until the number of phases equals the number threshold.

[0167] This invention also provides an electronic device, which includes a memory and a processor. The memory stores a computer program. When the computer program is executed by the processor, it causes the processor to perform the circuit phase matching method as described in any of the above embodiments.

[0168] The memory can be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. The memory has storage space for program code used to perform any of the method steps described above. For example, the storage space for program code may include individual program codes for implementing the various steps in the methods described above. This program code can be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, CDs, memory cards, or floppy disks. The program code may be compressed, for example, in a suitable form. When run by a computing processing device, this code causes the computing processing device to perform the various steps in the circuit phase-matching method described above.

[0169] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the circuit phase-matching method as described in any of the above embodiments.

[0170] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0171] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0172] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0173] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0174] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0175] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for phase comparison of circuits, characterized in that, include: When the transmission line under test is connected to the preset phase comparison test device, the induced voltage corresponding to each phase line in the transmission line under test is obtained; When the number of voltages corresponding to the induced voltage is equal to a preset voltage number threshold, the first target insulation resistance corresponding to the phase line is obtained; Based on the first target insulation resistance, the phase sequence of the corresponding phase line is checked to determine the line phase corresponding to the phase line and the number of phases is counted in real time. When the number of phases is equal to the preset phase number threshold, all existing line phases are used to construct the phase data table corresponding to the transmission line under test.

2. The line phase comparison method according to claim 1, characterized in that, The preset phase test device includes an induced voltage detection module; the step of obtaining the induced voltage corresponding to each phase line in the transmission line under test includes: The voltage analog signal corresponding to the phase line is acquired sequentially by the induced voltage detection module; The analog voltage signal is converted into a digital signal to generate the induced voltage corresponding to the phase line.

3. The line phase comparison method according to claim 1, characterized in that, The preset phase test device includes an insulation resistance detection module; The step of obtaining the first target insulation resistance corresponding to the phase line when the number of voltages corresponding to the induced voltage is equal to a preset voltage number threshold includes: When the number of voltages corresponding to the induced voltage is equal to the preset voltage number threshold, the insulation resistance detection module inputs a first test voltage to the phase line to obtain the corresponding first leakage current. Using the first leakage current and the first test voltage, calculate the first initial insulation resistance corresponding to the phase line; The first target insulation resistance corresponding to the phase line is determined based on the first initial insulation resistance and the preset resistance threshold.

4. The line phase comparison method according to claim 3, characterized in that, The step of determining the first target insulation resistance corresponding to the phase line based on the first initial insulation resistance and the preset resistance threshold includes: The phase line is grounded and discharged, and the first initial insulation resistance is updated to the first intermediate insulation resistance; Determine whether the first intermediate insulation resistance meets the preset resistance threshold; If so, the initial insulation resistance corresponding to the first intermediate insulation resistance shall be taken as the first target insulation resistance corresponding to the phase line; If not, then perform a circuit check on the phase line and jump to execute the step of inputting a first test voltage to the phase line through the insulation resistance detection module to obtain the corresponding first leakage current, until the first intermediate insulation resistance meets the resistance threshold.

5. The line phase comparison method according to claim 1, characterized in that, The preset phase sequence testing device includes a phase sequence verification and detection module; the step of performing phase sequence verification on the corresponding phase line based on the first target insulation resistance, determining the line phase corresponding to the phase line, and counting the number of phases in real time includes: The phase sequence verification and detection module inputs a second test voltage to the phase line to obtain the corresponding second leakage current. Using the second leakage current and the second test voltage, calculate the second initial insulation resistance corresponding to the phase line; Based on the second initial insulation resistance and the first target insulation resistance, the line phase corresponding to the phase line is determined and the number of phases is counted in real time.

6. The line phase comparison method according to claim 5, characterized in that, The step of determining the line phase corresponding to the phase line and counting the number of phases in real time based on the second initial insulation resistance and the first target insulation resistance includes: Determine whether the second initial insulation resistance meets the preset phase threshold; If so, the second initial insulation resistance shall be taken as the second target insulation resistance corresponding to the phase line; Based on the second target insulation resistance and the first target insulation resistance, the line phase corresponding to the phase line is determined and the number of phases is counted in real time. If not, perform a line check on the phase line and jump to the step of inputting a second test voltage to the phase line through the phase sequence verification and detection module to obtain the corresponding second leakage current, until the second initial insulation resistance meets the phase verification threshold.

7. The line phase comparison method according to claim 1, characterized in that, The step of constructing a phase data table corresponding to the transmission line under test using all existing line phases when the number of phases equals a preset phase number threshold includes: Determine whether the number of phases is equal to a preset phase number threshold; If so, construct a phase data table corresponding to the transmission line under test using all the existing line phases; If not, proceed to the step of obtaining the first target insulation resistance corresponding to the phase line until the number of phases equals the number threshold.

8. A circuit phase comparison system, characterized in that, include: The induced voltage acquisition module is used to acquire the induced voltage corresponding to each phase line in the transmission line under test when the transmission line under test is connected to a preset phase test device. The first target insulation resistance acquisition module is used to acquire the first target insulation resistance corresponding to the phase line when the number of voltages corresponding to the induced voltage is equal to a preset voltage number threshold. The line phase and phase quantity determination module is used to perform phase sequence verification on the corresponding phase line based on the first target insulation resistance, determine the line phase corresponding to the phase line and count the phase quantity in real time. The phase data table construction module is used to construct the phase data table corresponding to the transmission line under test by using all existing line phases when the number of phases is equal to a preset phase number threshold.

9. An electronic device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor causes the processor to perform the steps of the circuit phase matching method as described in any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, it implements the line phase matching method as described in any one of claims 1-7.

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