CN112834865B - Quick fault finder for secondary circuit of power system - Google Patents
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- 238000004088 simulation Methods 0.000 claims abstract description 13
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention discloses a quick fault finder for a secondary circuit of an electric power system, and relates to a secondary circuit fault technology; the simulation module is used for solving the common problems in the electric secondary circuit, making precautionary measures and reducing the occurrence of electric accidents; the simulation fault monitoring and recording of the secondary circuit are realized by adopting a fault diagnosis module mode, and the monitoring simulation of various types of relay protection devices can be realized by matching with a secondary circuit graph rapid modeling technology, so that the system has good universality and can run on any computer, and therefore, the system has good expansibility, can be conveniently installed on a plurality of computers, realizes multiple times of calculation, shortens the simulation time, and increases the simulation experiment result; and outputting a processing method corresponding to the successfully matched keyword, wherein the processing method is a preset standardized processing method, so that maintenance personnel can maintain the keyword by referring to a recommended method, the maintenance systematicness is improved, and larger loss caused by human errors is avoided.
Description
Technical Field
The invention belongs to the field of power systems, relates to a secondary circuit fault technology, and particularly relates to a quick fault finder for a secondary circuit of a power system.
Background
The secondary loop is connected by the secondary equipment according to different functional requirements, and can play a role in controlling, monitoring and protecting the primary equipment. The secondary circuit is a key link for ensuring the safe operation of the circuit in the power system. The secondary circuit is a precondition for the normal and stable operation of the power system. Because the secondary circuit is complicated, the defect concealment that exists is strong, and some faults often appear, and the fault cause is difficult to judge, and this is the problem that the electrical personnel often met. The method is characterized in that an electrical person first knows the main function of the secondary circuit and the working principle of secondary equipment according to the requirement, then analyzes the fault cause, and formulates precautionary measures according to a circuit diagram to avoid the occurrence of faults again.
Along with the progress of scientific technology, the complexity of electrical equipment is also higher and higher, and the automation and the intellectualization are gradually developed. The power system is required to be continuously developed and innovated, a modern electric technology is used for accurately designing the secondary circuit, and an automatic control device and an interlocking protection device are reasonably applied to realize electric automatic operation and protection functions. Due to the complexity and the variability of electricity, faults and hidden dangers can occur in a loop, and the normal production and life are affected, so that accidents such as power failure and even fire disaster are caused. Therefore, the common problems in the electric secondary circuit must be emphasized, precautionary measures are formulated, and the occurrence of electric accidents is reduced.
Disclosure of Invention
The invention aims to provide a quick fault finder for a secondary circuit of an electric power system, which is used for solving the common problems in an electric secondary circuit through a simulation module, making precautionary measures and reducing the occurrence of electric accidents.
The aim of the invention can be achieved by the following technical scheme:
a quick fault finder for a secondary circuit of an electric power system comprises a fault model module, a circuit classification module, a fault weight module, a fault diagnosis module, a drawing generation module and a fault processing module;
the drawing generation module is used for generating a secondary circuit electronic drawing of the power system and sending the electronic drawing to the circuit classification system for classification;
specifically, the circuit classification module is used for classifying the secondary circuit electronic drawing of the electric power system, sending the classified secondary circuit electronic drawing of the electric power system to the fault model module for fault prediction, distributing the fault weight of the secondary circuit of the electric power system through the fault weight module, and sending the fault distributed with the fault weight to the fault diagnosis module;
the fault diagnosis module generates a fault condition corresponding to the fault and sends the fault condition to the fault processing module;
the fault processing module is used for analyzing fault conditions and generating a processing method, and specifically comprises the following steps:
step one: acquiring fault conditions, and pushing according to the sequence from the large weight to the small weight;
step two: acquiring a feedback condition, namely acquiring a fault corresponding to matching when the feedback condition is matching, extracting keywords in the fault, and matching the keywords with preset keywords;
step three: outputting a processing method corresponding to the successfully matched keyword;
step four: and when the feedback condition does not appear after the pushing is finished, collecting the field fault characteristics, sending the field fault characteristics into a fault model module for recording, and sending the field fault characteristics to an expert group for remote maintenance guidance.
Further, the step of collecting the field fault characteristics is specifically to record the field fault characteristics by means of photographing, shooting, voice and text;
the method for transmitting the field fault characteristics to the expert group for remote maintenance guidance comprises the steps of transmitting the field fault characteristics recorded by photographing, shooting, voice and text methods to an intelligent terminal of the expert group through wireless transmission, 4G wireless transmission, 5G wireless transmission and wired transmission, wherein the intelligent terminal is a smart phone, a computer with an audio-video recording function and a tablet;
the expert group is a designer, a maintainer and a maintenance technical guide of the secondary circuit of the power system.
Further, the fault model module specifically obtains a classified secondary circuit electronic drawing of the electric power system generated by the circuit classification module, and establishes a topological structure, wherein the topological relation among all devices in the classified secondary circuit electronic drawing of the electric power system is described by adopting the concepts of devices, interfaces and single points, one device is provided with one or more interfaces, the single points are connection points generated when the devices are directly connected with each other through the interfaces, the single points are composed of ports of different devices, one single point comprises one or more interfaces, and the one interface is only affiliated to one single point;
and substituting initial states of various idle opening, pressing plates, operating handles and relays into the fault model module as initial coefficients according to the electronic drawing data of the secondary circuit of the power system and the actual application of the secondary circuit of the power system.
Further, the circuit classification module is used for classifying the secondary circuit electronic drawing of the power system, specifically, obtaining the secondary circuit electronic drawing of the power system;
when a circuit for indicating the working state appears in the secondary circuit electronic drawing of the power system, the circuit is marked as a signal circuit;
when a circuit for controlling the working state appears in the secondary circuit electronic drawing of the power system, the circuit is marked as a control circuit;
when a measuring circuit and a circuit for protecting normal operation appear in an electronic drawing of a secondary circuit of the power system, the secondary circuit is marked as a safety circuit;
and the signal loop circuit, the control loop circuit and the safety loop are marked in an electronic drawing of a secondary loop of the power system through different colors.
Further, the fault model module performs fault prediction, namely, a classified secondary circuit electronic drawing of the power system is obtained, forward voltage of interfaces of all devices is detected according to the topological relation and the current state of all devices from the positive electrode of a power supply in the classified secondary circuit electronic drawing of the power system until the negative electrode of the power supply is reached, and the power supply returns when a breakpoint or a single point of disconnection is encountered;
starting from a power supply negative electrode in the classified secondary circuit electronic drawing of the power system, detecting negative voltage of each device interface according to the topological relation and the current state of each device until the power supply positive electrode, and returning when a breakpoint or a disconnected single node is encountered; and determining the electrification condition of the element according to the positive voltage and the negative voltage conditions of each device interface, predicting the fault according to the electrification condition of the element, and obtaining the fault.
Further, the fault prediction comprises relay protection and control loop faults, current transformer secondary loop faults and voltage transformer secondary loop faults.
Further, the fault weight module performs fault weight distribution on the secondary circuit of the electric power system, specifically, performs simulation for several times through the fault model module, obtains the occurrence times and occurrence time of faults, establishes a judgment matrix through an APH method, and obtains a plurality of sub weights respectively through a composite weight calculation mode based on the judgment matrix, wherein the composite weight calculation mode specifically comprises the following steps: at least two of a geometric averaging method, an arithmetic averaging method, a feature vector method and a least square method, wherein the number of the sub-weights corresponds to the number of the computing modes contained in the composite weight computing mode;
average value calculation is carried out on each sub-weight, so that a second weight is obtained; the product of the first weight and the second weight is used for obtaining a weight product of the fault, and the ratio of the weight product of the fault index to the sum of the weight products of all fault indexes is calculated to obtain an index weight corresponding to the fault index;
the fault indexes specifically comprise the occurrence times and the first occurrence time of the faults.
Further, the fault diagnosis module generates a fault condition corresponding to a fault, specifically, the relay protection and control loop fault is specifically a switching action, a circuit break and a trip in the fault model module;
the secondary circuit fault of the current transformer is specifically that vibration, abnormal sound, heating, exceeding of a normal range of a current instrument display value, wire end discharge and terminal ignition occur in the transformer in the fault model module;
the secondary circuit fault of the voltage transformer is specifically a fault model module interrupter fusing, a quick-release switch tripping, a multipoint grounding and a voltage instability.
Further, the corresponding faults are obtained and matched, keywords in the faults are extracted, and the keywords are specifically the faults of relay protection and control loops corresponding to switching actions, circuit breaking and tripping;
vibration, abnormal sound, heating, current instrument display value exceeding normal range, wire end discharging and terminal sparking corresponding to secondary circuit fault of the current transformer;
the breaker fuses, a quick-release switch trips, multipoint grounding and voltage instability correspond to a secondary circuit fault of the voltage transformer.
Further, outputting a processing method corresponding to the successfully matched keyword, wherein the processing method is a preset standardized processing method;
the intelligent terminal of the maintenance personnel sends the output, and the intelligent terminal is a smart phone, a computer with an audio recording and video recording function and a tablet.
Compared with the prior art, the invention has the beneficial effects that:
(1) The simulated fault monitoring and recording of the secondary circuit is realized by adopting a fault diagnosis module. The secondary circuit graph rapid modeling technology can conveniently realize the construction of a secondary circuit, has less investment, saves investment, is convenient to upgrade and reform, can realize the monitoring simulation of various types of relay protection devices by adopting a modularized design and matching with the secondary circuit graph rapid modeling technology, has good universality and can run on any computer, therefore, has good expansibility, can be conveniently installed on a plurality of computers, realizes multiple times of calculation, shortens simulation time, increases simulation experiment results, can also be used for self-learning of maintenance personnel, and improves learning efficiency. In addition, the adopted secondary circuit network topology intelligent coloring technology is convenient for maintenance personnel to understand the relation among all parts in the secondary circuit, and quick detection of the circuit fault point is realized.
(2) Performing simulation for a plurality of times through a fault model module, obtaining occurrence times and occurrence time of faults, establishing a judgment matrix through an APH method, and respectively obtaining a plurality of sub-weights through a composite weight calculation mode based on the judgment matrix, wherein the composite weight calculation mode specifically comprises the following steps: at least two of a geometric averaging method, an arithmetic averaging method, a feature vector method and a least square method, wherein the number of the sub-weights corresponds to the number of the computing modes contained in the composite weight computing mode; average value calculation is carried out on each sub-weight, so that a second weight is obtained; the product of the first weight and the second weight is used for obtaining a weight product of the fault, and the ratio of the weight product of the fault index to the sum of the weight products of all fault indexes is calculated to obtain an index weight corresponding to the fault index; the fault indexes specifically comprise the occurrence times and the first occurrence time of the faults, so that a solving method is more scientifically recommended, the overhaul time is reduced, and the enterprise loss is reduced;
(3) And outputting a processing method corresponding to the successfully matched keyword, wherein the processing method is a preset standardized processing method, so that maintenance personnel can maintain the keyword by referring to a recommended method, the maintenance systematicness is improved, and larger loss caused by human errors is avoided.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a functional block diagram of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
Accordingly, the detailed description of the embodiments of the invention provided in the drawings below is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.
As shown in FIG. 1, the quick fault finder for the secondary circuit of the power system comprises a fault model module, a circuit classification module, a fault weight module, a fault diagnosis module, a drawing generation module and a fault processing module;
further, the modules are stored in a processor, which is an integrated circuit chip with signal processing capability. In the implementation process, each step of quickly searching the fault of the secondary circuit of the power system can be completed through an integrated logic circuit of hardware in a processor or an instruction in a software form. The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; but also digital signal processors (DigitalSignal Processing, DSP for short), application specific integrated circuits (Application Specific IntegratedCircuit, ASIC for short), field-programmable gate arrays (Field-Programmable Gate Array, FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods and steps of the invention in the embodiments of the invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method according to the present invention may be directly embodied in a hardware decoding processor or may be performed by a combination of hardware and software modules in the decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is positioned in the memory, the processor reads the information in the memory, and the step of quickly searching the fault of the secondary circuit of the power system in the implementation mode is completed by combining the hardware of the processor.
The drawing generation module is used for generating a secondary circuit electronic drawing of the power system and sending the electronic drawing to the circuit classification system for classification;
the circuit classification module is used for classifying the secondary circuit electronic drawing of the power system into a specific one, and acquiring the secondary circuit electronic drawing of the power system;
when a circuit for indicating the working state appears in the secondary circuit electronic drawing of the power system, the circuit is marked as a signal circuit;
when a circuit for controlling the working state appears in the secondary circuit electronic drawing of the power system, the circuit is marked as a control circuit;
when a measuring circuit and a circuit for protecting normal operation appear in an electronic drawing of a secondary circuit of the power system, the secondary circuit is marked as a safety circuit;
and the signal loop circuit, the control loop circuit and the safety loop are marked in an electronic drawing of a secondary loop of the power system through different colors.
Specifically, the circuit classification module is used for classifying the secondary circuit electronic drawing of the power system, and sending the classified secondary circuit electronic drawing of the power system to the fault model module for fault prediction;
specifically, the fault model module is used for acquiring a classified secondary circuit electronic drawing of the power system generated by the circuit classification module, and establishing a topological structure, wherein the topological relation among all devices in the classified secondary circuit electronic drawing of the power system is described by adopting the concepts of devices, interfaces and single points, one device is provided with one or more interfaces, the single points are connection points generated when the devices are directly connected with each other through the interfaces, the single points are composed of ports of different devices, one single point comprises one or more interfaces, and the one interface is only subordinate to one single point;
according to the electronic drawing data of the secondary circuit of the electric power system and the initial states of various idle opening, pressing plates, operating handles and relays of the secondary circuit of the electric power system in practical application, the initial coefficients are substituted into the fault model module.
In the implementation of the invention, the fault model module carries out fault prediction, namely, a classified secondary circuit electronic drawing of the power system is obtained, and the forward voltage of each device interface is detected according to the topological relation and the current state of each device by starting from the positive electrode of the power supply in the classified secondary circuit electronic drawing of the power system until reaching the negative electrode of the power supply and returns when encountering a breakpoint or a single point of disconnection;
starting from a negative electrode of a power supply in the classified secondary circuit electronic drawing of the power system, detecting negative voltage of interfaces of all devices according to the topological relation and the current state of all devices until the positive electrode of the power supply, and returning when encountering a breakpoint or a disconnected single node; and determining the electrification condition of the element according to the positive voltage and the negative voltage conditions of each device interface, predicting the fault according to the electrification condition of the element, and obtaining the fault.
Specifically, the fault prediction includes relay protection and control loop faults, current transformer secondary loop faults and voltage transformer secondary loop faults.
Performing fault weight distribution on the secondary circuit of the power system through a fault weight module, and sending the fault with the distributed fault weight to a fault diagnosis module;
specifically, the fault weight module performs fault weight distribution on a secondary circuit of the power system, specifically, performs simulation for several times through the fault model module, obtains the occurrence times and occurrence time of faults, establishes a judgment matrix through an APH method, and respectively obtains a plurality of sub weights through a composite weight calculation mode based on the judgment matrix, wherein the composite weight calculation mode specifically comprises the following steps: at least two of a geometric averaging method, an arithmetic averaging method, a feature vector method and a least square method, wherein the number of the sub weights corresponds to the number of the calculation modes contained in the composite weight calculation mode;
average value calculation is carried out on each sub-weight to obtain a second weight; the product of the first weight and the second weight is used for obtaining a weight product of the fault, and the ratio of the weight product of the fault index to the sum of the weight products of all the fault indexes is calculated to obtain an index weight corresponding to the fault index;
the fault indexes specifically comprise the occurrence times and the first occurrence time of the faults.
The fault diagnosis module generates a fault condition corresponding to the fault and sends the fault condition to the fault processing module;
specifically, the fault diagnosis module generates a fault condition corresponding to a fault, specifically, relay protection and control loop faults are specifically switching actions, circuit breaking and tripping in the fault model module;
the secondary circuit fault of the current transformer is specifically that vibration, abnormal sound, heating and terminal ignition of the transformer occur in a fault model module, and the display value of the current instrument exceeds the normal range;
the secondary circuit faults of the voltage transformer are specifically fault model module interrupter fusing, quick-release switch tripping, multipoint grounding and unstable voltage.
The fault processing module is used for analyzing fault conditions and generating a processing method, and specifically comprises the following steps:
step one: acquiring fault conditions, and pushing according to the sequence from the large weight to the small weight;
step two: acquiring a feedback condition, namely acquiring a fault corresponding to matching when the feedback condition is matching, extracting keywords in the fault, and matching the keywords with preset keywords;
step three: outputting a processing method corresponding to the successfully matched keyword;
when the invention is embodied, the corresponding fault is obtained and the key words in the fault are extracted, and the key words are the relay protection and control loop faults corresponding to the switching action, the breaking and the tripping;
vibration, abnormal sound, heating, current instrument display value exceeding normal range, wire end discharging and terminal sparking corresponding to secondary circuit fault of the current transformer;
the breaker fuses, a quick-release switch trips, multipoint grounding and voltage instability correspond to a secondary circuit fault of the voltage transformer.
Further, outputting a processing method corresponding to the successfully matched keyword, wherein the processing method is a preset standardized processing method;
specifically, the standardized processing method is an MP4 format video stored in a memory, that is, a machine-readable storage medium, for storing one or more MP4 format videos, where the one or more MP4 format videos are pushed by a processor to implement the storage of the standardized processing method, which is not limited herein.
The memory may include a high-speed random access memory (RAM, random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory. The communication connection between the system network element and the at least one other network element is implemented through at least one communication interface (which may be wired or wireless), and the internet, wide area network, local network, metropolitan area network, etc. may be used. The bus may be an ISA bus, a PCI bus, an EISA bus, or the like, and may be classified into an address bus, a data bus, a control bus, or the like.
The intelligent terminal of the maintenance personnel sends the output, and the intelligent terminal is a smart phone, a computer with an audio recording and video recording function and a tablet.
Step four: when the pushing is finished and the feedback condition is not matched, collecting the field fault characteristics, sending the field fault characteristics into a fault model module for recording, and sending the field fault characteristics to an expert group for remote maintenance guidance;
in the implementation of the invention, the collection of the field fault characteristics is specifically to record the field fault characteristics by means of photographing, shooting, voice and text;
the on-site fault characteristics are sent to an expert group for remote maintenance guidance, namely, the on-site fault characteristics recorded by photographing, shooting, voice and text methods are sent to an intelligent terminal of the expert group through wireless transmission, 4G wireless transmission, 5G wireless transmission and wired transmission, wherein the intelligent terminal is a smart phone, a computer with an audio recording and video recording function and a tablet;
the expert group is a designer, a maintainer and a maintenance technical guide of the secondary circuit of the power system.
The above formulas are all formulas with dimensions removed and numerical values calculated, the formulas are formulas with a large amount of data collected for software simulation to obtain the latest real situation, and preset parameters in the formulas are set by those skilled in the art according to the actual situation.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus, device and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be other manners of division when actually implemented; the modules illustrated as separate components may or may not be physically separate, and components shown as modules may or may not be physically separate, i.e., may be located in one place, or may be distributed over multiple network single points. Some or all of the modules may be selected according to actual needs to achieve the purpose of the method of this embodiment.
It will also be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.
The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims shall not be construed as limiting the claim concerned.
Furthermore, it is evident that the word "comprising" does not exclude other single points or steps, and that the singular does not exclude a plurality. Multiple single points or devices recited in the system claims may also be implemented by means of software or hardware in one single point or device. The terms second, etc. are used to denote a name, but not any particular order.
Finally, it should be noted that the above embodiments are only for illustrating the technical method of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical method of the present invention may be modified or substituted without departing from the spirit and scope of the technical method of the present invention.
Claims (8)
1. The quick fault finder for the secondary circuit of the power system is characterized by comprising a fault model module, a circuit classification module, a fault weight module, a fault diagnosis module, a drawing generation module and a fault processing module;
the drawing generation module is used for generating a secondary circuit electronic drawing of the power system and sending the electronic drawing to the circuit classification system for classification;
specifically, the circuit classification module is used for classifying the secondary circuit electronic drawing of the electric power system, sending the classified secondary circuit electronic drawing of the electric power system to the fault model module for fault prediction, distributing the fault weight of the secondary circuit of the electric power system through the fault weight module, and sending the fault distributed with the fault weight to the fault diagnosis module;
the fault diagnosis module generates a fault condition corresponding to the fault and sends the fault condition to the fault processing module;
the fault processing module is used for analyzing fault conditions and generating a processing method, and specifically comprises the following steps:
step one: acquiring fault conditions, and pushing according to the sequence from the large weight to the small weight;
step two: acquiring a feedback condition, namely acquiring a fault corresponding to matching when the feedback condition is matching, extracting keywords in the fault, and matching the keywords with preset keywords;
step three: outputting a processing method corresponding to the successfully matched keyword;
step four: when the pushing is finished and the feedback condition is not matched, collecting the field fault characteristics, sending the field fault characteristics into a fault model module for recording, and sending the field fault characteristics to an expert group for remote maintenance guidance;
the method for collecting the field fault characteristics comprises the steps of recording the field fault characteristics by means of photographing, shooting, voice and text;
the method for transmitting the field fault characteristics to the expert group for remote maintenance guidance comprises the steps of transmitting the field fault characteristics recorded by photographing, shooting, voice and text methods to an intelligent terminal of the expert group through 4G wireless transmission or 5G wireless transmission or wired transmission, wherein the intelligent terminal is a smart phone, a computer with an audio recording and video recording function and a tablet;
the expert group is a designer, a maintainer and a maintenance technical guide of the secondary circuit of the power system;
the fault model module is specifically used for acquiring a classified secondary circuit electronic drawing of the power system generated by the circuit classification module, and establishing a topological structure, wherein the topological relation among all devices in the classified secondary circuit electronic drawing of the power system is described by adopting the concepts of devices, interfaces and single points, one device is provided with one or more interfaces, the single points are connection points generated when the devices are directly connected with each other through the interfaces, the single points are composed of ports of different devices, one single point comprises one or more interfaces, and the one interface is only subordinate to one single point;
and substituting initial states of various idle opening, pressing plates, operating handles and relays into the fault model module as initial coefficients according to the electronic drawing data of the secondary circuit of the power system and the actual application of the secondary circuit of the power system.
2. The rapid fault finder for the secondary circuit of the electric power system according to claim 1, wherein the circuit classification module is used for classifying the electronic drawing of the secondary circuit of the electric power system, specifically, obtaining the electronic drawing of the secondary circuit of the electric power system;
when a circuit for indicating the working state appears in the secondary circuit electronic drawing of the power system, the circuit is marked as a signal circuit;
when a circuit for controlling the working state appears in the secondary circuit electronic drawing of the power system, the circuit is marked as a control circuit;
when a measuring circuit and a circuit for protecting normal operation appear in an electronic drawing of a secondary circuit of the power system, the secondary circuit is marked as a safety circuit;
and the signal loop circuit, the control loop circuit and the safety loop are marked in an electronic drawing of a secondary loop of the power system through different colors.
3. The rapid fault finder for the secondary circuit of the electric power system according to claim 2, wherein the fault model module performs fault prediction by acquiring a classified electric power system secondary circuit electronic drawing, detecting forward voltages of interfaces of all devices according to the topological relation and the current state of the devices from a positive electrode of a power supply in the classified electric power system secondary circuit electronic drawing until a negative electrode of the power supply and returning when encountering a breakpoint or a single point of disconnection;
starting from a power supply negative electrode in the classified secondary circuit electronic drawing of the power system, detecting negative voltage of each device interface according to the topological relation and the current state of each device until the power supply positive electrode, and returning when a breakpoint or a disconnected single node is encountered; and determining the electrification condition of the element according to the positive voltage and the negative voltage conditions of each device interface, predicting the fault according to the electrification condition of the element, and obtaining the fault.
4. A power system secondary loop fault quick finder according to claim 3, wherein the fault prediction includes relay protection and control loop faults, current transformer secondary loop faults and voltage transformer secondary loop faults.
5. The rapid fault finder for a secondary circuit of a power system according to claim 4, wherein the fault weight module performs fault weight distribution on the secondary circuit of the power system, specifically, performs simulation for several times through a fault model module, obtains the occurrence times and occurrence times of faults, establishes a judgment matrix through an APH method, and obtains a plurality of sub weights respectively through a complex weight calculation mode based on the judgment matrix, wherein the complex weight calculation mode specifically comprises: at least two of a geometric averaging method, an arithmetic averaging method, a feature vector method and a least square method, wherein the number of the sub-weights corresponds to the number of the computing modes contained in the composite weight computing mode;
average value calculation is carried out on each sub-weight, so that a second weight is obtained; the product of the first weight and the second weight is used for obtaining a weight product of the fault, and the ratio of the weight product of the fault index to the sum of the weight products of all fault indexes is calculated to obtain an index weight corresponding to the fault index;
the fault indexes specifically comprise the occurrence times and the first occurrence time of the faults.
6. The rapid power system secondary circuit fault finder according to claim 5, wherein the fault diagnosis module generates fault conditions corresponding to faults, specifically, relay protection and control circuit faults, specifically, switching actions, circuit breaks and tripping in a fault model module;
the secondary circuit fault of the current transformer is specifically that vibration, abnormal sound, heating, exceeding of a normal range of a current instrument display value, wire end discharge and terminal ignition occur in the transformer in the fault model module;
the secondary circuit fault of the voltage transformer is specifically a fault model module interrupter fusing, a quick-release switch tripping, a multipoint grounding and a voltage instability.
7. The rapid power system secondary circuit fault finder according to claim 6, wherein the obtaining matches the corresponding fault and extracts keywords in the fault, specifically, the keywords are switching actions, circuit breaking and tripping corresponding relay protection and control circuit faults;
vibration, abnormal sound, heating, current instrument display value exceeding normal range, wire end discharging and terminal sparking corresponding to secondary circuit fault of the current transformer;
the breaker fuses, a quick-release switch trips, multipoint grounding and voltage instability correspond to a secondary circuit fault of the voltage transformer.
8. The rapid power system secondary circuit fault finder according to claim 7, wherein the processing method corresponding to the successfully matched keyword is output, and the processing method is a preset standardized processing method;
the intelligent terminal of the maintenance personnel sends the output, and the intelligent terminal is a smart phone, a computer with an audio recording and video recording function and a tablet.
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| CN113376468B (en) * | 2021-06-23 | 2022-08-30 | 四川华能宝兴河水电有限责任公司 | Systematic detection method for defects of electrical secondary circuit |
| CN113486150B (en) * | 2021-07-13 | 2024-02-02 | 广西民族大学 | Machine fault diagnosis method and device based on event structure model |
| CN113465902B (en) * | 2021-07-30 | 2023-06-23 | 国网浙江省电力有限公司绍兴供电公司 | Method for diagnosing operation state of secondary circuit of high-voltage current transformer |
| CN114442239B (en) * | 2022-02-10 | 2024-05-31 | 广西防城港核电有限公司 | Relay protection signal loop optimal configuration method based on optical fiber interface device |
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