CN114928020B - Intelligent protection operation fault auxiliary analysis method for power distribution network - Google Patents
Intelligent protection operation fault auxiliary analysis method for power distribution network Download PDFInfo
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- CN114928020B CN114928020B CN202210739422.5A CN202210739422A CN114928020B CN 114928020 B CN114928020 B CN 114928020B CN 202210739422 A CN202210739422 A CN 202210739422A CN 114928020 B CN114928020 B CN 114928020B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
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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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- Artificial Intelligence (AREA)
- Evolutionary Computation (AREA)
- Emergency Protection Circuit Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides an intelligent protection operation fault auxiliary analysis method for a power distribution network, which is used for positioning the position of a fault point when a fault occurs; extracting relay protection equipment around a fault point position, acquiring fixed value data of the relay protection equipment, and recording the fixed value data as current-level fixed value data; acquiring fixed value data of relay protection equipment at the upper and lower corresponding positions of a system where the fault point is located, and recording the fixed value data as upper fixed value data and lower fixed value data; comparing the current level constant value data with stored standard constant value data, obtaining an upper level difference value according to the current level constant value data and the upper level constant value data, obtaining a lower level difference value according to the current level constant value data and the lower level constant value data, and comparing the upper level difference value and the lower level difference value with a preset difference threshold value respectively; performing fault auxiliary analysis according to the comparison result, and obtaining an auxiliary analysis result; according to the fixed value data between the upper and lower systems, the fault auxiliary analysis is carried out in a matching way, so that the accuracy of the fault analysis can be ensured.
Description
Technical Field
The invention relates to the technical field of distribution network fault analysis, in particular to an intelligent protection operation fault auxiliary analysis method for a distribution network.
Background
The relay protection equipment is a very important secondary device in the power distribution network, so that the safe operation of the power system can be ensured, in the actual operation, the fixed value of the relay protection equipment can influence the normal operation of the power system, and further influence the normal operation of the power system, therefore, fault analysis can be assisted through the detection of the fixed value, in the power system, the relay protection equipment at all levels are mutually cooperated, the fixed value setting between the same relay protection equipment at the upper and lower levels needs to be mutually cooperated, and when one relay protection equipment fixed value changes, the fixed value change of the relay protection equipment at other levels can be possibly caused, further influence the safe operation of the power system, however, the fixed value cooperation condition of the relay protection equipment at multiple levels is not analyzed in the current power system, and the fault analysis cannot be effectively assisted.
Disclosure of Invention
In view of the above, the invention provides an intelligent protection operation fault auxiliary analysis method for a power distribution network, which can perform auxiliary analysis of faults through fixed value data of relay protection equipment at upper and lower stages.
The technical scheme of the invention is realized as follows:
an intelligent protection operation fault auxiliary analysis method for a power distribution network comprises the following steps:
s1, positioning the position of a fault point when a fault occurs;
s2, extracting relay protection equipment around the fault point position, acquiring fixed value data of the relay protection equipment, and recording the fixed value data as current-level fixed value data;
step S3, acquiring fixed value data of relay protection equipment at the upper and lower corresponding positions of the system where the fault point is located, and recording the fixed value data as upper fixed value data and lower fixed value data;
s4, comparing the current level constant value data with stored standard constant value data, obtaining an upper level difference value according to the current level constant value data and the upper level constant value data, obtaining a lower level difference value according to the current level constant value data and the lower level constant value data, and comparing the upper level difference value and the lower level difference value with a preset difference threshold value respectively;
and S5, performing fault auxiliary analysis according to the comparison result, and obtaining an auxiliary analysis result.
Preferably, the method further comprises the step S0 of constructing a distribution network equipment relationship topological graph.
Preferably, in the step S1, a traveling wave fault location method is used to locate the fault point.
Preferably, the specific steps of the step S2 are as follows:
s21, mapping the positioned fault point position to a power distribution network equipment relationship topological graph;
step S22, starting from the fault point position to two sides, searching at least two relay protection devices closest to each other;
and S23, acquiring fixed value data of the relay protection equipment and recording the fixed value data as current-level fixed value data.
Preferably, the specific steps of the step S3 are as follows:
step S31, searching a current level system to which fault points on a power distribution network equipment relationship topological graph belong;
step S32, traversing a system to which all routes in a power distribution network equipment relationship topological graph belong;
step S33, acquiring a superior system and a subordinate system matched with the present-level system;
and step S34, acquiring fixed value data of relay protection equipment corresponding to relay protection equipment around the fault point position of the current stage system in the upper stage system and the lower stage system, and recording the fixed value data as upper stage fixed value data and lower stage fixed value data.
Preferably, when the power distribution network device relationship topology graph is constructed, the step S0 records the constant value data of each relay protection device contained in the topology graph to form standard constant value data, and calculates the difference threshold according to the constant value data of the same type of relay protection devices between the upper and lower systems matched with each other.
Preferably, the auxiliary analysis result in the step S5 includes abnormal fixed value, improper fixed value matching and out-of-order matching.
Preferably, when the difference between the comparison result of the current level constant value data in the step S4 and the stored standard constant value data is large, the auxiliary analysis result is abnormal constant value.
Preferably, when the difference between the upper level difference value and the lower level difference value in the step S4 and the comparison result of the preset difference threshold is larger, the auxiliary analysis result is that the fixed value is improperly matched or the matching is out of order.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an intelligent protection operation fault auxiliary analysis method for a power distribution network, which is characterized in that after a fault point position is obtained, relay protection equipment around the fault point position is extracted, own-level constant value data of the relay protection equipment are obtained, constant value data of corresponding relay protection equipment in an upper system and a lower system of a system where the fault point position is located are extracted, own-level constant value data and standard constant value data are compared, constant value difference values and difference thresholds of the upper system and the lower system are compared, fault auxiliary analysis is carried out through a comparison result, and workers can be assisted in judging fault types.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only preferred embodiments of the present 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 flowchart of an intelligent protection operation fault auxiliary analysis method for a power distribution network according to the present invention.
Detailed Description
For a better understanding of the technical content of the present invention, a specific example is provided below, and the present invention is further described with reference to the accompanying drawings.
Referring to fig. 1, the method for intelligently assisting in analyzing protection operation faults of a power distribution network provided by the invention comprises the following steps:
s1, positioning the position of a fault point when a fault occurs;
s2, extracting relay protection equipment around the fault point position, acquiring fixed value data of the relay protection equipment, and recording the fixed value data as current-level fixed value data;
step S3, acquiring fixed value data of relay protection equipment at the upper and lower corresponding positions of the system where the fault point is located, and recording the fixed value data as upper fixed value data and lower fixed value data;
s4, comparing the current level constant value data with stored standard constant value data, obtaining an upper level difference value according to the current level constant value data and the upper level constant value data, obtaining a lower level difference value according to the current level constant value data and the lower level constant value data, and comparing the upper level difference value and the lower level difference value with a preset difference threshold value respectively;
and S5, performing fault auxiliary analysis according to the comparison result, and obtaining an auxiliary analysis result.
The invention discloses an intelligent protection operation fault auxiliary analysis method for a power distribution network, which is used for carrying out fault auxiliary analysis according to a plurality of groups of fixed value data, when a line of the power distribution network fails, firstly locating the position of a fault point, then searching relay protection equipment around a system where the fault point is located, acquiring fixed value data of the current relay protection equipment, and then recording the fixed value data as current fixed value data, wherein the corresponding standard fixed value data of the relay protection equipment can be correspondingly acquired, the current fixed value data can be compared with the standard fixed value data, and if the difference of comparison results is larger, auxiliary analysis results can be correspondingly obtained according to the comparison results.
In order to fully consider various fault types, the invention also extracts and analyzes relay protection equipment of an upper and lower system of the system where the fault point is located, extracts fixed value data of corresponding relay protection equipment in the upper and lower system matched with the system where the fault point is located, respectively marks the extracted fixed value data as upper fixed value data and lower fixed value data, the difference value between the upper fixed value data and the lower fixed value data of the same relay protection equipment is an upper differential value, the difference value between the lower fixed value data and the lower fixed value data of the same relay protection equipment is a lower differential value, and the fixed value data of the relay protection equipment of the whole power distribution network has a standard value, so that standard differential threshold values exist between the relay protection equipment of the upper and lower systems matched with each other, respectively compares the upper differential value and the lower differential value with the standard differential threshold value, and can correspondingly obtain auxiliary analysis results according to comparison results.
Preferably, the method further comprises the step S0 of constructing a power distribution network equipment relationship topological graph, recording the constant value data of each relay protection equipment contained in the topology graph to form standard constant value data, and calculating to obtain a difference threshold according to the constant value data of the same type of relay protection equipment between the upper and lower systems matched with each other.
Before the fault point position is located, a distribution network equipment relation topological graph needs to be constructed, wherein the distribution network equipment relation topological graph comprises specific positions among the acquisition master stations, line connection trend, length and the like between the master stations and the substation and relay protection equipment arranged on the lines, acquired data are converted into the distribution network equipment relation topological graph, the distribution network equipment relation topological graph comprises matching relations among upper and lower systems, when the relay protection equipment is acquired, fixed value data set by the relay protection equipment are correspondingly acquired, so that standard fixed value data are formed, and standard difference thresholds can be obtained through calculation according to the standard fixed value data.
Preferably, in the step S1, a traveling wave fault location method is used to locate the fault point.
The traveling wave fault location method can be used for rapidly and accurately obtaining the fault point position.
Preferably, the specific steps of the step S2 are as follows:
s21, mapping the positioned fault point position to a power distribution network equipment relationship topological graph;
step S22, starting from the fault point position to two sides, searching at least two relay protection devices closest to each other;
and S23, acquiring fixed value data of the relay protection equipment and recording the fixed value data as current-level fixed value data.
After the topological graph of the power distribution network equipment relationship is built, mapping the positioned fault point position onto the topological graph, then starting from the fault point position, searching relay protection equipment from two sides, selecting at least two relay protection equipment closest to the fault point position as fault auxiliary analysis equipment in order to ensure the accuracy of fault analysis, and then acquiring the current constant value of the relay protection equipment as current constant value data.
Preferably, the specific steps of the step S3 are as follows:
step S31, searching a current level system to which fault points on a power distribution network equipment relationship topological graph belong;
step S32, traversing a system to which all routes in a power distribution network equipment relationship topological graph belong;
step S33, acquiring a superior system and a subordinate system matched with the present-level system;
and step S34, acquiring fixed value data of relay protection equipment corresponding to relay protection equipment around the fault point position of the current stage system in the upper stage system and the lower stage system, and recording the fixed value data as upper stage fixed value data and lower stage fixed value data.
After the fault point position and the current level fixed value data of relay protection equipment near the fault point position are obtained, traversing the system of the adjacent line from the distribution network relation topological graph, searching the upper and lower systems matched with the system of the fault point position, simultaneously searching the corresponding relay protection equipment in the upper and lower systems according to the relay protection equipment searched in the current level, obtaining the fixed value data of the relay protection equipment, and respectively recording the fixed value data as the upper level fixed value data and the lower level fixed value data.
Preferably, the auxiliary analysis result in the step S5 includes abnormal fixed value, improper fixed value matching and out-of-order matching, and when the difference between the comparison result of the current-level fixed value data and the stored standard fixed value data is large, the auxiliary analysis result is abnormal fixed value; when the difference between the upper level difference value and the lower level difference value is larger than the comparison result of the preset difference threshold value, the auxiliary analysis result is that the fixed value is improper in fit or the fit is out of order.
The auxiliary analysis results of the faults comprise a plurality of types, when the constant value data of the current level is not matched with the stored standard constant value data, the abnormal constant value of the relay protection equipment is indicated, when the upper level difference value or the lower level difference value is not matched with the difference threshold value, the problem of matching between the current level and the upper level or the lower level is indicated, the corresponding auxiliary analysis results are that the constant value is not matched or the matching is out of limit, and the staff can adopt the corresponding strategy according to the corresponding auxiliary analysis results.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (1)
1. An intelligent protection operation fault auxiliary analysis method for a power distribution network is characterized by comprising the following steps of:
s0, constructing a power distribution network equipment relation topological graph, recording constant value data of each relay protection equipment contained in the power distribution network equipment relation topological graph when constructing the power distribution network equipment relation topological graph, forming standard constant value data, and calculating to obtain a difference threshold according to the constant value data of the same type of relay protection equipment between the upper and lower systems matched with each other;
s1, positioning the position of a fault point when a fault occurs, and positioning the position of the fault point by adopting a traveling wave fault positioning method;
s2, extracting relay protection equipment around a fault point position, acquiring constant value data of the relay protection equipment, and recording the constant value data as current-level constant value data, wherein the specific steps are as follows:
s21, mapping the positioned fault point position to a power distribution network equipment relationship topological graph;
step S22, starting from the fault point position to two sides, searching at least two relay protection devices closest to each other;
step S23, acquiring fixed value data of the relay protection equipment and recording the fixed value data as current-level fixed value data;
step S3, acquiring fixed value data of relay protection equipment at the upper and lower corresponding positions of the system where the fault point is located, and recording the fixed value data as upper fixed value data and lower fixed value data, wherein the specific steps are as follows:
step S31, searching a current level system to which fault points on a power distribution network equipment relationship topological graph belong;
step S32, traversing a system to which all routes in a power distribution network equipment relationship topological graph belong;
step S33, acquiring a superior system and a subordinate system matched with the present-level system;
step S34, acquiring fixed value data of relay protection equipment corresponding to relay protection equipment around the fault point position of the current level system in the upper level system and the lower level system, and recording the fixed value data as upper level fixed value data and lower level fixed value data;
s4, comparing the current level constant value data with stored standard constant value data, obtaining an upper level difference value according to the current level constant value data and the upper level constant value data, obtaining a lower level difference value according to the current level constant value data and the lower level constant value data, respectively comparing the upper level difference value and the lower level difference value with a preset difference threshold value, when the comparison result of the current level constant value data and the stored standard constant value data is larger in difference, the auxiliary analysis result is abnormal, and when the comparison result of the upper level difference value and the lower level difference value and the preset difference threshold value is larger in difference, the auxiliary analysis result is mismatching of the constant value or out-of-limit matching;
and S5, performing fault auxiliary analysis according to the comparison result, and obtaining an auxiliary analysis result, wherein the auxiliary analysis result comprises abnormal fixed value, improper fixed value matching and out-of-order matching and out-of-limit.
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| WO2018116315A1 (en) * | 2016-12-23 | 2018-06-28 | Ecolibrium Energy Private Limited | A system for monitoring electrical devices and a method thereof |
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