CN117852773B - Fault positioning system for power distribution network - Google Patents
Fault positioning system for power distribution network Download PDFInfo
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- CN117852773B CN117852773B CN202410238405.2A CN202410238405A CN117852773B CN 117852773 B CN117852773 B CN 117852773B CN 202410238405 A CN202410238405 A CN 202410238405A CN 117852773 B CN117852773 B CN 117852773B
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- 230000002159 abnormal effect Effects 0.000 claims description 19
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention relates to the technical field of power distribution network fault monitoring, and particularly discloses a power distribution network fault positioning system.
Description
Technical Field
The invention relates to the technical field of power distribution network fault monitoring, in particular to a power distribution network fault positioning system.
Background
Distribution networks refer to power networks that receive electrical energy from a power transmission network or regional power plant and distribute the electrical energy locally or step-by-step in voltage across distribution facilities to various customers. The distribution network mainly comprises distribution lines and distribution substations, and can be divided into a high-voltage distribution network, a medium-voltage distribution network and a low-voltage distribution network according to different voltage ranges.
In the patent publication number CN113933645A, the pushing module, the positioning module, the studying and judging module and the shell are sequentially connected, the pushing module searches a distribution power switch according to the distribution network path topology reverse tracing, informs a distribution network dispatcher of the searching result, the positioning module positions and guides the distribution network outage range to a distribution network rush-repair command shift to upload power outage information, informs operation and maintenance personnel to check the line on site, and the studying and judging module confirms whether the fault event belongs to a plan or a fault according to the comparison plan power outage library power outage event type, generates a fault power outage record according to the feedback information, integrates big data and accurately studies and judges faults, strengthens monitoring of abnormal distribution network data, and reversely checks whether the distribution network plan work is executed, whether the distribution network fault is conceal and the fault is reported.
In the prior art, when a fault occurs in a distribution substation in a distribution network, a fault point in the distribution substation cannot be accurately positioned, so that long time is possibly wasted for monitoring and processing in the fault processing process of the distribution substation.
Disclosure of Invention
The invention aims to provide a fault positioning system for a power distribution network, which is characterized in that any circuit device is used as a target circuit device, a bypass circuit device which is adjacent to and connected with the target circuit device is obtained by taking the circuit device as a center, the total bypass risk value of the bypass circuit device and the total risk value of the target circuit device are subjected to fusion processing to obtain the risk degree value of the circuit device, all the risk degree values of the circuit devices in a power distribution substation are ordered in a sequence from big to small, and the higher the risk degree value of the circuit device is, the higher the fault degree of the circuit device is, so that the visual management of the fault point of the circuit device in the power distribution substation is completed.
The aim of the invention can be achieved by the following technical scheme:
a power distribution network fault location system, comprising:
the data acquisition module is used for acquiring behavior dynamic data of the distribution substation and obtaining running output electric energy of the distribution substation based on the behavior dynamic data;
Processing the output electric energy of the distribution substation operation to obtain a normal signal of the distribution substation operation and an abnormal signal of the distribution substation operation, and transmitting the normal signal of the distribution substation operation and the abnormal signal of the distribution substation operation to a cloud management and control platform;
The decision analysis module receives an abnormal signal of the power distribution substation operation of the cloud management and control platform, identifies and processes the states of circuit devices in the power distribution substation to obtain a risk total value FJZ of the circuit devices, and transmits the risk total value of the circuit devices to the cloud management and control platform;
The fault evaluation module receives a risk total value FJZ of the circuit device, combines the total using time length FSN of the power distribution substation and the ratio FGi of the total maintaining times of the power distribution substation to the total fault times to obtain a crisis value of the power distribution substation, and then recognizes the crisis value of the power distribution substation to finish the evaluation of the risk degree of the power distribution substation;
By the formula And calculating to obtain a crisis value FWi of the distribution substation, wherein a1, a2 and a3 are preset proportionality coefficients.
As a further scheme of the invention: the behavior dynamic data comprise output voltage and output current of an output end of the power distribution substation;
And multiplying the output current and the output voltage when the distribution transformer operates and integrating the time to obtain the operation output electric energy of the operation time period of the distribution transformer.
As a further scheme of the invention: comparing the power distribution substation operation output electric energy with a power distribution substation operation output electric energy threshold;
If the operation output electric energy of the distribution substation is not less than the operation output electric energy threshold value of the distribution substation, the operation of the distribution substation is normal, and a normal signal of the operation of the distribution substation is obtained;
And if the operation output electric energy of the distribution substation is smaller than the operation output electric energy threshold value of the distribution substation, indicating that the operation of the distribution substation is abnormal, and obtaining an operation abnormal signal of the distribution substation.
As a further scheme of the invention: acquiring all circuit devices required to be monitored of the power distribution transformer, acquiring a directory required to be monitored of each circuit device, and marking the directory corresponding to the required to be monitored as an online monitoring item;
acquiring real-time monitoring data of an online monitoring item, calling a preset numerical requirement corresponding to the online monitoring item, and marking the online monitoring item, of which the real-time monitoring data does not meet the preset numerical requirement, as a risk monitoring item;
Acquiring the number of risk monitoring items and the number of online monitoring items;
and calculating the ratio of the number of the risk monitoring items to the number of the on-line monitoring items to obtain the risk ratio of the monitoring items of the circuit device.
As a further scheme of the invention: calculating the difference value between the real-time monitoring data of the risk monitoring item and the real-time monitoring data threshold value of the risk monitoring item to obtain a risk deviation value Fp;
Performing product calculation on the risk deviation value Fp and a preset risk coefficient k to obtain a risk value Fi of the monitoring item;
I.e. by the formula Summing all monitoring item risk values Fi of the circuit device, and obtaining an average value to obtain a monitoring item risk total risk value Fm of the circuit device;
performing product operation on the monitoring item risk ratio Jz of the circuit device and the total risk value Fm of the monitoring item risk of the circuit device to obtain a total risk value FJ of the circuit device;
And summing the risk total values of all circuit devices to obtain the total risk value FJZ of the power distribution substation.
As a further scheme of the invention: the limit value of the crisis value of the preset distribution substation is FWi and FWi, wherein FWi1 is less than FWi;
When FWi is smaller than FWi1, the risk degree of the distribution substation is low, and a first-level early warning signal is generated;
when FWi < FWi < FWi2, generating a secondary early warning signal in the risk degree of the distribution substation;
When FWi is more than or equal to FWi, the risk degree of the distribution substation is high, and a three-level early warning signal is generated.
As a further scheme of the invention: the power distribution substation fault point positioning system comprises a power distribution substation fault point positioning module, a fault positioning module and a fault positioning module, wherein the fault positioning module is used for positioning a power distribution substation fault point;
and selecting any circuit device in the distribution substation, marking the circuit device as a target circuit device, and taking the target circuit device as a center to acquire a bypass circuit device which is adjacent to and connected with the target circuit device.
As a further scheme of the invention: acquiring a risk total value of the bypass circuit device, and carrying out Fpj on the risk total value of the bypass circuit device;
The number of bypass circuit devices is obtained, and the number of the bypass circuit devices is recorded as Pj;
I.e. by the formula And calculating to obtain a bypass risk total value FP.
As a further scheme of the invention: weighting the risk total value FJ and the bypass risk total value FP of the circuit device to obtain a risk degree value of the circuit device。
As a further scheme of the invention: risk degree value of all circuit devices in power distribution substationOrdering according to the order of big to small, and the risk degree value/>, of circuit devicesThe greater the level of failure of the circuit device, the higher the level of failure.
The invention has the beneficial effects that:
(1) The invention acquires behavior dynamic data of a distribution substation, obtains the running output electric energy of the distribution substation based on the behavior dynamic data, obtains the running abnormal signal of the distribution substation by processing the running output electric energy of the distribution substation, obtains the risk total value of circuit devices by identifying and processing the states of the circuit devices in the distribution substation based on the running abnormal signal of the distribution substation, obtains the crisis value of the distribution substation by combining the total using time length of the distribution substation and the ratio of the total maintenance times of the distribution substation to the total fault times, and completes the assessment of the risk degree of the distribution substation by identifying the crisis value of the distribution substation.
(2) According to the invention, any circuit device is taken as a target circuit device, the bypass circuit device which is adjacent to and connected with the target circuit device is obtained by taking the circuit device as a center, the bypass risk total value of the bypass circuit device and the risk total value of the target circuit device are fused to obtain the risk degree value of the circuit device, all the risk degree values of the circuit devices in the distribution substation are ordered in a sequence from big to small, and the higher the risk degree value of the circuit device is, the higher the fault degree of the circuit device is, so that the visual management of the fault point of the circuit device in the distribution substation is completed.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a block diagram of a fault location system for a power distribution network in accordance with embodiment 1 of the present invention;
fig. 2 is a block diagram of a fault location system for a power distribution network according to embodiment 2 of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, the present invention is a fault location system for a power distribution network, including a data acquisition module, a decision analysis module, a fault evaluation module, and a cloud management platform;
the data acquisition module, the decision analysis module and the fault evaluation module are electrically connected with the cloud control platform;
the data acquisition module is used for acquiring behavior dynamic data of the distribution substation and obtaining operation output electric energy of the distribution substation based on the behavior dynamic data;
Processing the output electric energy of the distribution substation operation to obtain a normal signal of the distribution substation operation and an abnormal signal of the distribution substation operation, and transmitting the normal signal of the distribution substation operation and the abnormal signal of the distribution substation operation to a cloud management and control platform;
The decision analysis module receives an abnormal signal of the operation of the power distribution substation of the cloud control platform, recognizes and processes the states of circuit devices in the power distribution substation to obtain a risk total value of the circuit devices, and transmits the risk total value of the circuit devices to the cloud control platform;
The fault evaluation module receives the total risk value of the circuit device, combines the total using time length of the power distribution substation and the ratio of the total maintenance times of the power distribution substation to the total fault times to obtain the crisis value of the power distribution substation, and then recognizes the crisis value of the power distribution substation to complete the evaluation of the risk degree of the power distribution substation.
The output end of the distribution substation is provided with a voltage sensor, and the voltage sensor is used for collecting the voltage output by the distribution substation in real time to obtain the output voltage of the distribution substation;
A current sensor is arranged at the output end of the distribution substation, and the current sensor is used for collecting the current output by the distribution substation in real time to obtain the output current of the distribution substation;
Multiplying the output current and the output voltage when the distribution transformer is operated and integrating the time to obtain the operation output electric energy of the operation time period when the distribution transformer is operated;
comparing the power distribution substation operation output electric energy with a power distribution substation operation output electric energy threshold;
If the operation output electric energy of the distribution substation is not less than the operation output electric energy threshold value of the distribution substation, the operation of the distribution substation is normal, and a normal signal of the operation of the distribution substation is obtained;
If the operation output electric energy of the distribution substation is smaller than the operation output electric energy threshold value of the distribution substation, the abnormal operation of the distribution substation is indicated, and an abnormal operation signal of the distribution substation is obtained;
operating an abnormal signal based on the power distribution substation;
Acquiring all circuit devices required to be monitored of the power distribution transformer, acquiring a directory required to be monitored of each circuit device, and marking the directory corresponding to the required to be monitored as an online monitoring item;
acquiring real-time monitoring data of an online monitoring item, calling a preset numerical requirement corresponding to the online monitoring item, and marking the online monitoring item, of which the real-time monitoring data does not meet the preset numerical requirement, as a risk monitoring item;
Acquiring the number of risk monitoring items and the number of online monitoring items;
calculating the ratio of the number of risk monitoring items to the number of on-line monitoring items to obtain the risk ratio Jz of the monitoring items of the circuit device;
Calculating the difference value between the real-time monitoring data of the risk monitoring item and the real-time monitoring data threshold value of the risk monitoring item to obtain a risk deviation value Fp;
Performing product calculation on the risk deviation value Fp and a preset risk coefficient k to obtain a risk value Fi of the monitoring item;
The preset risk coefficients of the risk monitoring items are called, and the fact that the values of the preset risk coefficients are larger than zero is required to be recorded in advance by staff and stored in a processor, and the larger the values of the preset risk coefficients are, the larger the adverse effects of deviation of the corresponding risk monitoring items on operation safety of circuit devices are indicated;
I.e. by the formula Summing all monitoring item risk values Fi of the circuit device, and obtaining an average value to obtain a monitoring item risk total risk value Fm of the circuit device;
performing product operation on the monitoring item risk ratio Jz of the circuit device and the total risk value Fm of the monitoring item risk of the circuit device to obtain a total risk value FJ of the circuit device;
summing the risk total values of all circuit devices to obtain a total risk value FJZ of the distribution substation;
By the formula Calculating to obtain a crisis value FWi of the distribution substation, wherein a1, a2 and a3 are preset proportion coefficients;
FSN is the total time used by the distribution substation, FGi is the ratio of the total maintenance times of the distribution substation to the total fault times;
The limit value of the crisis value of the preset distribution substation is FWi and FWi, wherein FWi1 is less than FWi;
When FWi is smaller than FWi1, the risk degree of the distribution substation is low, and a first-level early warning signal is generated;
when FWi < FWi < FWi2, generating a secondary early warning signal in the risk degree of the distribution substation;
When FWi is more than or equal to FWi, the risk degree of the distribution substation is high, and a three-level early warning signal is generated.
And the visual management of the maintenance of the distribution substation is completed through the identification of the risk degree of the distribution substation.
Example 2
Based on the risk degree of the distribution substation in embodiment 1, the fault point of the distribution substation is positioned by a fault positioning module, and the method is specific:
Selecting any circuit device in the distribution substation, marking the circuit device as a target circuit device, and taking the target circuit device as a center to obtain a bypass circuit device which is adjacent to and connected with the target circuit device;
Acquiring a risk total value of the bypass circuit device, and carrying out Fpj on the risk total value of the bypass circuit device;
The number of bypass circuit devices is obtained, and the number of the bypass circuit devices is recorded as Pj;
I.e. by the formula Calculating to obtain a bypass risk total value FP;
wherein j=1, 2, … …, j; wherein j is the number of bypass circuit devices;
weighting the risk total value FJ of the circuit device and the bypass risk total value FP, namely dividing the weight ratio of the risk total value FJ of the circuit device into d1, dividing the weight ratio of the bypass risk total value FP into d2, and passing through the formula 2 Obtaining the risk degree value/>, of the circuit device；
Wherein,And d1 is greater than d2;
risk degree value of all circuit devices in power distribution substation Ordering according to the order of big to small, and the risk degree value/>, of circuit devicesThe greater the level of failure of the circuit device, the higher the level of failure.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (1)
1. A power distribution network fault location system, comprising:
the data acquisition module is used for acquiring behavior dynamic data of the distribution substation and obtaining running output electric energy of the distribution substation based on the behavior dynamic data;
Processing the output electric energy of the distribution substation operation to obtain a normal signal of the distribution substation operation and an abnormal signal of the distribution substation operation, and transmitting the normal signal of the distribution substation operation and the abnormal signal of the distribution substation operation to a cloud management and control platform;
The decision analysis module receives an abnormal signal of the power distribution substation operation of the cloud management and control platform, identifies and processes the states of circuit devices in the power distribution substation to obtain a risk total value FJZ of the circuit devices, and transmits the risk total value of the circuit devices to the cloud management and control platform;
The fault evaluation module receives a risk total value FJZ of the circuit device, combines the total using time length FSN of the power distribution substation and the ratio FGi of the total maintaining times of the power distribution substation to the total fault times to obtain a crisis value of the power distribution substation, and then recognizes the crisis value of the power distribution substation to finish the evaluation of the risk degree of the power distribution substation;
By the formula Calculating to obtain a crisis value FWi of the distribution substation, wherein a1, a2 and a3 are preset proportion coefficients;
The behavior dynamic data comprise output voltage and output current of an output end of the power distribution substation;
multiplying the output current and the output voltage when the distribution transformer is operated and integrating the time to obtain the operation output electric energy of the operation time period when the distribution transformer is operated;
comparing the power distribution substation operation output electric energy with a power distribution substation operation output electric energy threshold;
If the operation output electric energy of the distribution substation is not less than the operation output electric energy threshold value of the distribution substation, the operation of the distribution substation is normal, and a normal signal of the operation of the distribution substation is obtained;
If the operation output electric energy of the distribution substation is smaller than the operation output electric energy threshold value of the distribution substation, the abnormal operation of the distribution substation is indicated, and an abnormal operation signal of the distribution substation is obtained;
Acquiring all circuit devices required to be monitored of the power distribution transformer, acquiring a directory required to be monitored of each circuit device, and marking the directory corresponding to the required to be monitored as an online monitoring item;
acquiring real-time monitoring data of an online monitoring item, calling a preset numerical requirement corresponding to the online monitoring item, and marking the online monitoring item, of which the real-time monitoring data does not meet the preset numerical requirement, as a risk monitoring item;
Acquiring the number of risk monitoring items and the number of online monitoring items;
Calculating the ratio of the number of risk monitoring items to the number of on-line monitoring items to obtain the risk ratio of the monitoring items of the circuit device;
Calculating the difference value between the real-time monitoring data of the risk monitoring item and the real-time monitoring data threshold value of the risk monitoring item to obtain a risk deviation value Fp;
Performing product calculation on the risk deviation value Fp and a preset risk coefficient k to obtain a risk value Fi of the monitoring item;
I.e. by the formula Summing all monitoring item risk values Fi of the circuit device, and obtaining an average value to obtain a monitoring item risk total risk value Fm of the circuit device;
performing product operation on the monitoring item risk ratio Jz of the circuit device and the total risk value Fm of the monitoring item risk of the circuit device to obtain a total risk value FJ of the circuit device;
summing the risk total values of all circuit devices to obtain a total risk value FJZ of the distribution substation;
The limit value of the crisis value of the preset distribution substation is FWi and FWi, wherein FWi1 is less than FWi;
When FWi is smaller than FWi1, the risk degree of the distribution substation is low, and a first-level early warning signal is generated;
when FWi < FWi < FWi2, generating a secondary early warning signal in the risk degree of the distribution substation;
when FWi is more than or equal to FWi, the risk degree of the distribution substation is high, and a three-level early warning signal is generated;
the power distribution substation fault point positioning system comprises a power distribution substation fault point positioning module, a fault positioning module and a fault positioning module, wherein the fault positioning module is used for positioning a power distribution substation fault point;
Selecting any circuit device in the distribution substation, marking the circuit device as a target circuit device, and taking the target circuit device as a center to obtain a bypass circuit device which is adjacent to and connected with the target circuit device;
Acquiring a risk total value of the bypass circuit device, and carrying out Fpj on the risk total value of the bypass circuit device;
The number of bypass circuit devices is obtained, and the number of the bypass circuit devices is recorded as Pj;
I.e. by the formula Calculating to obtain a bypass risk total value FP;
weighting the risk total value FJ and the bypass risk total value FP of the circuit device to obtain a risk degree value of the circuit device ;
Risk degree value of all circuit devices in power distribution substationOrdering according to the order of big to small, and the risk degree value/>, of circuit devicesThe greater the level of failure of the circuit device, the higher the level of failure.
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