A fault locating method and system for substation secondary equipment power supply alarm

Abstract

The present disclosure belongs to the technical field of substation fault location, and particularly relates to a substation secondary equipment power supply alarm fault location method and system, comprising: acquiring a power supply topology loop of substation secondary equipment; determining an influencing factor causing a substation secondary equipment power supply alarm; calculating a priority of the influencing factor, and troubleshooting monitoring information of a fault occurring in the acquired power supply topology loop according to the priority to realize fault location. The present disclosure couples secondary equipment monitoring information, power supply monitoring information, alternating current monitoring information and PDU monitoring information, improves the fault location method, adopts different troubleshooting means according to different fault phenomena, thereby accurately and quickly judging a fault point and improving fault repair efficiency.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of substation fault location, and particularly relates to a substation secondary equipment power supply alarm fault location method and system. BACKGROUND

[0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] The secondary equipment such as substation communication equipment, relay protection interface device, and stability interface device is powered by-48V DC power supply. Since the power supply environment involves device power supply board card, device internal cable, PDU (power distribution unit) air switch, PDU to distribution screen cable, distribution screen air switch, cable and fuse between distribution screen and rectifier screen, rectifier screen, and rectifier screen upper AC, and different links belong to different professional personnel operation and maintenance, when the device has power supply abnormity, it is unable to accurately identify which device link of which professional operation and maintenance has fault, and only one professional can sequentially check the device link of his own operation and maintenance. If there is no fault point, another professional is notified to continue checking, or multiple professionals simultaneously cause sequential checking. This checking method wastes a large amount of manpower and material resources, and is unable to quickly and accurately find the fault link, has low repair efficiency, and can cause further expansion of accident influence range. SUMMARY

[0004] In order to solve the above problems, the present disclosure provides a substation secondary equipment power supply alarm fault location method and system. By coupling secondary equipment monitoring information, power supply monitoring information, AC monitoring information, and PDU monitoring information, the improved fault location method takes different checking means according to different fault phenomena, so as to accurately and quickly judge the fault point and improve the fault repair efficiency.

[0005] According to some embodiments, the first aspect of the present disclosure provides a substation secondary equipment power supply alarm fault location method, which adopts the following technical scheme:

[0006] A substation secondary equipment power supply alarm fault location method, comprising:

[0007] Obtaining a power supply topology loop of substation secondary equipment;

[0008] Determining an influencing factor causing a substation secondary equipment power supply alarm;

[0009] Calculating a priority of the influencing factor, checking monitoring information of the obtained power supply topology loop according to the priority, and realizing fault location.

[0010] As a further technical limitation, the acquired power supply topology loop of the substation secondary equipment is a full link for supplying power to the substation secondary equipment, including AC monitoring information, power supply monitoring information, PDU monitoring information, secondary equipment monitoring information, and dumb resources not subject to real-time monitoring.

[0011] As a further technical limitation, the influencing factors triggering the substation secondary equipment power alarm include the number of faulty devices causing the power alarm, whether a single power failure occurs, and whether it belongs to the same screen cabinet.

[0012] Further, the priority of the influencing factors is determined according to the strength of the association between the influencing factors and the faults and whether the influencing factors have monitoring information; the order of priority of the influencing factors is the number of faulty devices causing the power alarm, whether it belongs to the same screen cabinet, and whether a single power failure occurs.

[0013] As a further technical limitation, when the secondary equipment power fails, the number of faulty devices is determined; when the number of faulty devices is 1, the troubleshooting order of the power supply topology loop is selected according to whether it is a single power failure, until the fault point is found, and the fault location is completed; when the number of faulty devices is not 1, the influencing factors are further determined.

[0014] Further, when the number of faulty devices is not 1, it is determined whether the faulty devices are in the same screen cabinet; when the faulty devices are in the same screen cabinet, the troubleshooting order of the power supply topology loop is selected according to whether it is a single power failure, until the fault point is found, and the fault location is completed; when the faulty devices are not in the same screen cabinet, the influencing factors are further determined.

[0015] Further, when the faulty devices are not in the same screen cabinet, the troubleshooting order of the power supply topology loop is selected according to whether it is a single power failure, until the fault point is found, and the fault location is completed.

[0016] According to some embodiments, the second aspect of the present disclosure provides a substation secondary equipment power alarm fault locating system, which adopts the following technical solution:

[0017] A substation secondary equipment power alarm fault locating system, comprising:

[0018] An acquisition module configured to acquire a power supply topology loop of substation secondary equipment;

[0019] A determination module configured to determine influencing factors triggering a substation secondary equipment power alarm;

[0020] A fault locating module configured to calculate the priority of the influencing factors, troubleshoot monitoring information of the acquired power supply topology loop according to the priority, and realize fault location.

[0021] According to some embodiments, a third aspect of the present disclosure provides a computer readable storage medium, adopting the technical scheme as follows:

[0022] A computer readable storage medium, having a program stored thereon, which, when executed by a processor, implements the steps in the fault locating method for substation secondary equipment power alarm as described in the first aspect of the present disclosure.

[0023] According to some embodiments, a fourth aspect of the present disclosure provides an electronic device, adopting the technical scheme as follows:

[0024] An electronic device, comprising a memory, a processor, and a program stored in the memory and executable on the processor, wherein the processor implements the steps in the fault locating method for substation secondary equipment power alarm as described in the first aspect of the present disclosure when executing the program.

[0025] Compared with the prior art, the present disclosure has the beneficial effects that:

[0026] The present disclosure improves the fault locating method by coupling secondary equipment monitoring information, power monitoring information, AC monitoring information, and PDU monitoring information, and adopts different troubleshooting methods according to different fault phenomena, so as to accurately and quickly judge the fault point and improve the fault repair efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which form a part of the present disclosure, are used to provide further understanding of the present disclosure, and the schematic embodiments of the present disclosure and their descriptions are used to explain the present disclosure, and do not constitute an improper limitation on the present disclosure.

[0028] Figure 1 is a flowchart of the fault locating method for substation secondary equipment power alarm in the first embodiment of the present disclosure;

[0029] Figure 2 is a power supply topology loop schematic diagram of the substation secondary equipment in the first embodiment of the present disclosure;

[0030] Figure 3 is a flowchart of the first stage of fault locating in the first embodiment of the present disclosure;

[0031] Figure 4 is a flowchart of the second stage of fault locating in the first embodiment of the present disclosure;

[0032] Figure 5 is a flowchart of the second stage of fault locating in the first embodiment of the present disclosure;

[0033] Figure 6 is a structural block diagram of the fault locating system for substation secondary equipment power alarm in the second embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0035] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] The specific meanings of the terms used in this disclosure should not be construed as limitations on this disclosure.

[0038] Where there is no conflict, the embodiments and features described herein can be combined with each other.

[0039] Example 1

[0040] Embodiment 1 of this disclosure introduces a fault location method for power supply alarms in substation secondary equipment.

[0041] like Figure 1 The method for locating power supply alarms in substation secondary equipment, as shown, includes:

[0042] Obtain the power supply topology of the secondary equipment in the substation;

[0043] Identify the factors that trigger power supply alarms in substation secondary equipment;

[0044] The priority of the influencing factors is calculated, and the monitoring information of the power supply topology circuit that has been obtained is checked according to the priority to realize the fault location.

[0045] This embodiment innovatively constructs a power supply topology loop for substation secondary equipment based on monitoring information such as substation secondary equipment monitoring information, power supply monitoring information, AC monitoring information, and PDU monitoring information. This power supply topology loop encompasses the entire power supply process for substation secondary equipment. Based on the number of power supply alarms, the cabinet to which the alarm belongs, and whether it is a single or dual power supply, different priorities are applied to monitor and investigate nodes in the power supply topology loop that may experience faults until the faulty node is located. The priority is determined by the strength of the correlation between the node and the fault, and whether there is monitoring information for that node. This solves the problem of not being able to locate power supply alarms for secondary equipment in a timely and accurate manner in substations.

[0046] As shown in the power supply topology loop of substation secondary equipment, 380V AC screen input air switch ① and 380V AC screen input air switch ② belong to AC monitoring information, -48V power supply rectifier screen ③, communication storage battery ④, rectifier screen output fuse ⑤, distribution screen input fuse ⑦ and distribution screen output air switch ⑧ belong to power supply monitoring information, PDU input air switch ⑩ and PDU output air switch belong to PDU monitoring information, and equipment power supply board card belongs to secondary equipment monitoring information, inter-screen cable ⑥, distribution screen to equipment PDU cable ⑨ and PDU to equipment cable are dumb resources that cannot be included in real-time monitoring.

[0047] When power supply alarm of secondary equipment occurs, according to the number of devices, whether single power supply failure, whether the same screen cabinet and other information, different priorities are selected to troubleshoot, and the fault point is quickly found. The specific process is as follows:

[0048] As shown in the power supply topology loop of substation secondary equipment, 380V AC screen input air switch ① and 380V AC screen input air switch ② belong to AC monitoring information, -48V power supply rectifier screen ③, communication storage battery ④, rectifier screen output fuse ⑤, distribution screen input fuse ⑦ and distribution screen output air switch ⑧ belong to power supply monitoring information, PDU input air switch ⑩ and PDU output air switch Figure 3 belong to PDU monitoring information, and equipment power supply board card ⑩⑧ of the sequence, if the fault point is still not found, the ⑨ in the power supply topology loop of substation secondary equipment is checked on site; when it does not belong to single power supply failure, the power supply topology loop of substation secondary equipment is checked in the order of ⑧⑩ , if the fault point is still not found, the ⑨ in the power supply topology loop of substation secondary equipment is checked on site; ⑩⑧ of the sequence, if the fault point is still not found, the ⑨ in the power supply topology loop of substation secondary equipment is checked on site; when it does not belong to single power supply failure, the power supply topology loop of substation secondary equipment is checked in the order of ⑧⑩

[0049] When the number of fault devices is not 1, the influencing factors are further judged.

[0050] As shown in the power supply topology loop of substation secondary equipment, 380V AC screen input air switch ① and 380V AC screen input air switch ② belong to AC monitoring information, -48V power supply rectifier screen ③, communication storage battery ④, rectifier screen output fuse ⑤, distribution screen input fuse ⑦ and distribution screen output air switch ⑧ belong to power supply monitoring information, PDU input air switch ⑩ and PDU output air switch Figure 4 belong to PDU monitoring information, and equipment power supply board card ⑩⑧ of the sequence, if the fault point is still not found, the ⑨ in the power supply topology loop of substation secondary equipment is checked on site; when it does not belong to single power supply failure, the power supply topology loop of substation secondary equipment is checked in the order of ⑧⑩ , if the fault point is still not found, the ⑨ in the power supply topology loop of substation secondary equipment is checked on site; ⑩⑧ of the sequence, if the fault point is still not found, the ⑨ in the power supply topology loop of substation secondary equipment is checked on site; when it does not belong to single power supply failure, the power supply topology loop of substation secondary equipment is checked in the order of ⑧⑩​​ 9.

[0051] When the faulty device is in a different screen cabinet, continue to determine the influencing factors;

[0052] As Figure 5 shown, when the faulty device is in a different screen cabinet, according to whether it is a single power failure, the troubleshooting order of the power supply topology loop is selected until the fault point is found, and the fault location is completed; specifically, when it is a single power failure, the power supply topology loop of the secondary equipment of the substation is investigated in the order of ③②④⑤⑦⑧, if the fault point is still not found, then the ⑥ in the power supply topology loop of the secondary equipment of the substation is investigated on site; when it is not a single power failure, the power supply topology loop of the secondary equipment of the substation is investigated in the order of ②①③④⑤⑦, if the fault point is still not found, then the ⑥ in the power supply topology loop of the secondary equipment of the substation is investigated on site.

[0053] This embodiment takes the single power supply alarm of multiple secondary equipment power supplies in the same screen cabinet as an example, and applies the method proposed in this embodiment to quickly locate the fault.

[0054] When an alarm occurs in the power supply of a certain secondary equipment of a substation, the dispatch checks the details and finds that the number of devices that have the alarm is greater than 1, and all of them are in the same screen cabinet and share the same PDU, and the alarm information shows a single power supply alarm.

[0055] The priority is determined according to the strength of the association of the link with the fault and whether the link has monitoring information. The link with monitoring information and strong association with the fault is investigated first.

[0056] Since the devices that have the power supply alarm are not all devices, but multiple devices in the same screen cabinet, the distribution screen itself and the upper links have no problem, ①②③④⑤⑥⑦ are not related to this fault.

[0057] If the ⑩ PDU input air switch fails, the devices in the entire screen cabinet will lose power in one way, which is strongly associated with the fault phenomenon and the link distance is closer, so the priority is ranked first; if the ⑧ distribution screen output air switch fails, it is also strongly associated with the fault phenomenon, but since the link distance is farther than ⑩, the priority of ⑧ is ranked second; only when multiple PDU output air switches fail at the same time, the fault phenomenon will occur, so it is weakly related, and the priority is ranked third; since the number of devices that have the alarm is not unique, the possibility of failure of the power supply board of multiple devices is low, and it is weakly associated with the fault phenomenon, so the priority is ranked fourth; the investigation is carried out in the order of ⑩⑧ .

[0058] First, check the input circuit breaker of PDU ⑩. If the circuit breaker status or input current is abnormal, the initial judgment is that the input circuit breaker of PDU ⑩ is faulty. If ⑩ is normal, check the output circuit breaker of the distribution panel ⑧. If the circuit breaker of the distribution panel that supplies power to this PDU is abnormal in status or output current, the initial judgment is that the output circuit breaker of the distribution panel ⑧ is faulty. If ⑧ is normal, check the information of the faulty device. If the PDU output circuit breaker is faulty or the output current is abnormal, the initial judgment is as follows: PDU output circuit breaker failure; if If normal, then investigate. If the power supply board is malfunctioning, the initial diagnosis is a faulty power supply board. If everything is normal, then the investigation of the monitored links is complete. The next step is to investigate the unmonitored "dumb" resources, which requires on-site investigation. Status of PDU to device cables and ⑨ Distribution panel to PDU cables.

[0059] This embodiment improves the fault location method by coupling secondary equipment monitoring information, power supply monitoring information, AC monitoring information and PDU monitoring information. Based on different fault phenomena, different troubleshooting methods are adopted to accurately and quickly determine the fault point and improve the efficiency of fault repair.

[0060] Example 2

[0061] Embodiment 2 of this disclosure introduces a fault location system for power supply alarms in substation secondary equipment.

[0062] like Figure 6 The fault location system for power supply alarms in substation secondary equipment, as shown, includes:

[0063] The acquisition module is configured to acquire the power supply topology of the secondary equipment in the substation.

[0064] The determination module is configured to determine the influencing factors that trigger power supply alarms in substation secondary equipment.

[0065] The fault location module is configured to calculate the priority of the influencing factors, and based on the priority, check the monitoring information of the acquired power supply topology circuit fault to achieve fault location.

[0066] The detailed steps are the same as the fault location method for power supply alarms of substation secondary equipment provided in Example 1, and will not be repeated here.

[0067] Example 3

[0068] Embodiment 3 of this disclosure provides a computer-readable storage medium.

[0069] A computer readable storage medium, having stored thereon a program, the program being executed by a processor to implement the steps of the fault location method for substation secondary device power alarm as described in Embodiment One of the present disclosure.

[0070] The detailed steps are the same as the fault location method for substation secondary device power alarm provided in Embodiment One, and will not be repeated here.

[0071] Embodiment Four

[0072] Embodiment Four of the present disclosure provides an electronic device.

[0073] An electronic device includes a memory, a processor, and a program stored in the memory and executable on the processor, and the processor implements the steps of the fault location method for substation secondary device power alarm as described in Embodiment One of the present disclosure when executing the program.

[0074] The detailed steps are the same as the fault location method for substation secondary device power alarm provided in Embodiment One, and will not be repeated here.

[0075] The above only describes the preferred embodiments of the present disclosure and is not intended to limit the present disclosure. Those skilled in the art can make various modifications and changes to the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

[0076] Although the specific embodiments of the present disclosure are described above in combination with the accompanying drawings, the present disclosure is not limited to the scope of the present disclosure. Those skilled in the art should understand that various modifications or changes made on the basis of the technical solutions of the present disclosure without the need for creative labor are still within the protection scope of the present disclosure.

Claims

1. A fault location method for power supply alarms in secondary equipment of a substation, characterized in that, include: Obtain the power supply topology of the secondary equipment in the substation; Identify the factors that trigger power supply alarms in substation secondary equipment; Calculate the priority of the influencing factors, and check the monitoring information of the power supply topology circuit faults obtained according to the priority to achieve fault location; When a secondary equipment power supply fails, the number of faulty devices is determined. If the number of faulty devices is 1, the power supply topology circuit is checked according to whether it is a single power supply fault, until the fault point is found and the fault location is completed. Specifically, when it is a single power supply fault, the power supply topology circuit of the substation secondary equipment is checked in the order of equipment power supply board - power distribution unit output circuit breaker - power distribution unit input circuit breaker - distribution panel output circuit breaker. If the fault point is still not found, the power distribution unit to equipment cable - distribution panel to equipment power distribution unit cable in the power supply topology circuit of the substation secondary equipment is checked on-site. When it is not a single power supply fault, the power supply topology circuit of the substation secondary equipment is checked in the order of power distribution unit input circuit breaker - distribution panel output circuit breaker - power distribution unit output circuit breaker - equipment power supply board. If the fault point is still not found, the power distribution unit to equipment cable - distribution panel to equipment power distribution unit cable in the power supply topology circuit of the substation secondary equipment is checked on-site. If the number of faulty devices is not 1, continue to determine the influencing factors; When the number of faulty devices is not 1, determine whether the faulty devices are in the same cabinet. If the faulty devices are in the same cabinet, select the troubleshooting order of the power supply topology circuit according to whether it is a single power supply fault, until the fault point is found and the fault location is completed. Specifically, when it is a single power supply fault, check the power supply topology circuit of the substation secondary equipment in the order of power distribution unit input circuit breaker - distribution panel output circuit breaker - power distribution unit output circuit breaker - equipment power supply board. If the fault point is still not found, check the power distribution unit to equipment cable - distribution panel to equipment power distribution unit cable in the power supply topology circuit of the substation secondary equipment. When it is not a single power supply fault, check the power supply topology circuit of the substation secondary equipment in the order of distribution panel output circuit breaker - power distribution unit input circuit breaker - power distribution unit output circuit breaker - equipment power supply board. If the fault point is still not found, check the power distribution unit to equipment cable - distribution panel to equipment power distribution unit cable in the power supply topology circuit of the substation secondary equipment. When the faulty equipment is not in the same cabinet, continue to determine the influencing factors; When the faulty equipment is located in different cabinets, the troubleshooting order of the power supply topology circuit is selected according to whether it is a single power supply fault, until the fault point is found and the fault location is completed. Specifically, when it is a single power supply fault, the power supply topology circuit of the substation secondary equipment is checked in the following order: -48V power rectifier panel - 380V AC panel input circuit breaker - communication battery - rectifier panel output fuse - distribution panel input fuse - distribution panel output circuit breaker. If the fault point is still not found, the inter-panel cables in the power supply topology circuit of the substation secondary equipment are checked on-site. When it is not a single power supply fault, the power supply topology circuit of the substation secondary equipment is checked in the following order: 380V AC panel input circuit breaker - 380V AC panel input circuit breaker - 48V power rectifier panel - communication battery - rectifier panel output fuse - distribution panel input fuse. If the fault point is still not found, the inter-panel cables in the power supply topology circuit of the substation secondary equipment are checked on-site.

2. The fault location method for power supply alarms in substation secondary equipment as described in claim 1, characterized in that, The acquired power supply topology circuit of the substation secondary equipment is the entire process of power supply to the substation secondary equipment, including AC monitoring information, power supply monitoring information, PDU monitoring information, secondary equipment monitoring information, and dumb resources that are not monitored in real time.

3. The fault location method for power supply alarms in substation secondary equipment as described in claim 1, characterized in that, The factors that trigger power supply alarms in substation secondary equipment include the number of faulty devices that trigger power supply alarms, whether a single power supply fault occurs, and whether the faults are caused by devices in the same control panel.

4. The fault location method for power supply alarms in substation secondary equipment as described in claim 3, characterized in that, The priority of the influencing factors is determined based on the strength of the correlation between the influencing factors and the fault and whether there is monitoring information for the influencing factors; the order of priority of the influencing factors is as follows: the number of faulty devices that have power alarms, whether they belong to the same cabinet, and whether a single power supply fault has occurred.

5. A fault location system for power supply alarms in substation secondary equipment, employing the fault location method for power supply alarms in substation secondary equipment as described in any one of claims 1-4, characterized in that... include: The acquisition module is configured to acquire the power supply topology of the secondary equipment in the substation. The determination module is configured to determine the influencing factors that trigger power supply alarms in substation secondary equipment. The fault location module is configured to calculate the priority of the influencing factors, and based on the priority, check the monitoring information of the acquired power supply topology circuit fault to achieve fault location.

6. A computer-readable storage medium having a program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps in the fault location method for power supply alarm of substation secondary equipment as described in any one of claims 1-4.

7. An electronic device comprising a memory, a processor, and a program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps in the fault location method for power supply alarm of substation secondary equipment as described in any one of claims 1-4.

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