CN110795680A - Multi-target programming-based comprehensive evaluation method for state of direct current protection system - Google Patents
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Abstract
The invention relates to a direct current protection system state comprehensive evaluation method based on multi-target planning, which comprises the following steps: analyzing influence factors of state evaluation of a direct current protection system, and constructing a direct current protection system state evaluation index system; step two, solving an index weight value by adopting a multi-target planning weighting method based on the direct current protection system state evaluation index system constructed in the step one, and establishing a direct current protection system state evaluation model; and step three, comprehensively evaluating the state of the direct current protection system to obtain an evaluation value F of the state of the direct current protection system. The method constructs the quantitative analysis method of the state of the direct current protection system from multiple angles such as safe operation, equipment reliability, operation and maintenance, solves the weighted value of the multi-target planning method, and effectively avoids the defect of single index evaluation.
Description
Technical Field
The invention relates to the technical field of research on equipment states of power systems, in particular to a comprehensive evaluation method for states of a direct current protection system based on multi-target planning.
Background
With the rapid development of renewable energy sources such as wind energy storage and the like and ultrahigh voltage in China, direct current transmission is more concerned by people due to large capacity, long transmission distance, asynchronous power grid interconnection and distributed energy grid connection. The direct current relay protection system is used as an important guarantee for normal and stable operation of the power system, can monitor various operation parameters and operation states of the power system in real time, can judge and process abnormal states in time, and is an important guarantee for stable operation of a direct current power transmission system (as shown in fig. 1).
At present, the running state of the direct current protection system equipment is generally evaluated from the reliability of a power grid, quantitative analysis of the running state of the equipment is less involved, the daily running maintenance work of the direct current protection system equipment is mainly based on periodic maintenance and assists certain inspection, and the technical basis of on-line running inspection is lacked due to the lack of pertinence, so that a comprehensive evaluation index system of the direct current protection system state is constructed, and a multi-target planning method is applied to give an index empowerment.
The multi-target planning empowerment method not only integrates the subjective opinions of people, but also avoids the comparative scoring among all targets, and also considers the objective and practical requirements, the method has small required information amount and can obtain satisfactory results, and is particularly suitable for the situation that the empowerment needs to be performed for many times, a representative case can be selected as a base point during practical use so as to obtain the satisfactory results quickly, and the method is programmed on a computer to run very quickly and conveniently.
Disclosure of Invention
The invention aims to provide a multi-target programming-based comprehensive evaluation method for the state of a direct current protection system, which is used for evaluating the running state of direct current transmission protection system equipment and providing an important reference basis for the running maintenance work of the direct current protection system equipment.
The purpose of the invention is realized by the following technical scheme:
a direct current protection system state comprehensive evaluation method based on multi-objective programming comprises the following steps:
the method comprises the following steps: analyzing the influence factors of the state evaluation of the direct current protection system, and constructing a direct current protection system state evaluation index system;
step two: solving an index weight value by adopting a multi-target planning weighting method based on the DC protection system state evaluation index system constructed in the first step, and establishing a DC protection system state evaluation model;
step three: and comprehensively evaluating the state of the direct current protection system to obtain an evaluation value F of the state of the direct current protection system.
Further, a first step of constructing a direct current protection system state evaluation index system from multiple angles such as safe operation, equipment reliability, operation, maintenance and the like, wherein a detailed index calculation formula is as follows:
(1) safe operation index M1
Safe operation index M of direct current protection system1Including protection of correct action rate M11Protection of the fast excision Rate M12And the protection device commissioning rate M13The calculation formula is as follows:
a) protection of correct action rate M11
M11＝F/E*100％ (1)
In the formula, F is the number of correct actions of relay protection; e is the total number of relay protection actions;
b) protection of fast resection Rate M12
M12＝X/T*100％ (2)
In the formula, X represents the number of times of actual fault quick removal; t total number of times fault should be removed rapidly;
c) the commissioning rate M of the protection device13
M13＝Y/S*100％ (3)
In the formula, Y represents the time when the protection put into the system is in an operating state; s, the main protection is required to be put into operation for the total time;
(2) equipment reliability index M2
Equipment reliability index M2Including the failure rate M of the DC primary equipment21Protection family defect rate index M22Failure rate M of protection device23Their calculation formulas are respectively as follows: a) primary equipment failure rate M21
M21＝t/(t+T)*100％ (4)
In the formula, t represents the total duration of one-time equipment failure in the system; t represents the accumulated normal working time of primary equipment in the system;
b) protection family Defect Rate index M22
M22＝B/C*100％ (5)
In the formula, B is the total number of the family defects of the relay protection equipment; c is the total number of the relay protection equipment of the specific direct current system;
c) failure rate M of protection device23
M23＝D/C*100％ (6)
In the formula, D is the total number of the relay protection equipment with failure; c is the total number of the direct current protection system reliability systems in a batch;
(3) operation and maintenance index M3
The operation and maintenance index of the direct current protection system can be completed by the maintenance completion rate M31And protection countermeasure completion rate M32Two indexes are considered, and the calculation formula is as follows:
a) maintenance completion rate M31
M31＝P/Q*100％ (7)
In the formula, P represents the number of devices which have completed maintenance tasks in the direct current protection system; q represents the total number of the devices planned to be overhauled in the direct-current protection system;
b) protection countermeasure completion rate M32
M32＝R/K*100％ (8)
In the formula, R represents the number of counter measures which are completed in time; k represents the total number of actions that should be completed.
Further, the specific implementation process of the step two is as follows:
(1) relative membership matrix of construction index
Forming q candidate schemes according to actual operation data, wherein each scheme needs to consider p indexes and uses xjkThe k index in the j scheme is expressed, and the target matrix (x) can be obtainedjk)p×qSelecting formula of relative membership degree to x for eliminating influence of different dimensionsjkNormalized as follows:
1) when the evaluation value is positively correlated with the index value,
2) when the evaluation value is negatively correlated with the index value,
3) the index value is a fixed valueWhen the evaluation value is the highest, the evaluation value is calculated,
4) the index value is in a certain range [ dj,d'j]The time-assessment value is the highest,
wherein, DeltajTo represent1≤k≤q，σjRepresents max { d }j-djmin,djmax-d'jThen, a relative membership matrix R ═ R (R) of the indices can be obtainedjk)p×qThe higher the relative membership of the index is, the better the index value of the scheme is, and a relatively optimal scheme is defined as a base point scheme, namely G0＝(1,1,…,1,1)T；
(2) Determining a weight vector
Let W be (ω) as the weight vector corresponding to p indices1,ω2,…,ωp-1,ωp)TThe closer scheme k is to scheme G0The smaller the deviation, the more likely the solution is to be selected, and the deviation from the optimal solution can be measured by equation (13) when the solution k is adopted:
obviously, gkThe smaller the (. omega.) the better;
(3) establishing a multi-objective planning model
The multi-objective planning model is built accordingly as follows:
since each scheme is independent of the others, the problem of planning the targets can be decomposed into a plurality of single-target planning problems, i.e.
(4) Calculating the weight
The lagrange function is constructed as follows:
calculating the partial derivatives thereof to satisfy
The formula is solved to obtain
Normalizing the obtained weight to obtain
Further, the specific implementation process of the step three is as follows:
according to the actual situation, comprehensively calculating the indexes of each direct current protection system state evaluation to obtain index scores, then multiplying each index score by a weighted value, and summing in sequence to obtain a direct current protection system state evaluation value F, wherein the calculation steps are as follows:
wherein M isiThe calculated value of the ith index in the state evaluation index system of the direct current protection system is obtained by questionnaire survey or on-site actual measurement; wiIs the weighted value of the ith index.
Compared with the prior art, the invention has the beneficial effects that: the method can simultaneously consider a plurality of angles and quantize and unify various indexes, utilizes the grasped information to a greater extent, improves the scientificity and rationality of the state evaluation of the direct current protection system, and provides important guarantee for the reliable protection of the direct current transmission line.
Drawings
Fig. 1 is a block diagram of a high voltage direct current transmission system according to the invention;
fig. 2 is a diagram of a dc protection system state evaluation index system according to the present invention.
Detailed Description
The present invention will be further described with reference to specific examples to fully understand the objects, features and effects of the present invention.
In the embodiment, the data are from the operation conditions of the high-voltage direct-current transmission protection system of the GETTAN dam converter station and the Longquan converter station in 2014 to 2018 of the Hubei power grid.
In this embodiment, a method for comprehensively evaluating a state of a dc protection system based on multi-objective programming includes the following steps:
the method comprises the following steps: according to the actual operation condition, the data of each index in the direct current protection system operation state evaluation index system (as shown in fig. 2) is directly read or calculated from the converter station.
TABLE 1 data for the operation of the GE & Dongba dam and Longquan converter stations from 2014 to 2018
Step two: empowering indexes by applying multi-target planning method
TABLE 2 empowerment value of evaluation index of DC protection system
| Index (I) | M11 | M12 | M13 | M21 | M22 | M23 | M31 | M32 |
| Weighting value | 0.1231 | 0.1208 | 0.0098 | 0.1346 | 0.2109 | 0.2567 | 0.0087 | 0.1354 |
Step three: performing comprehensive evaluation
TABLE 3 comprehensive assessment score for Kudzuvine and Longquan converter stations
| Item | Kudzuvine river dam convertor station | Longquan convertor station |
| Evaluation score F | 87 | 65 |
The method comprehensively considers a plurality of influence factors, acquires important indexes of the state evaluation of the direct current protection system according to an online monitoring device, an inspection system and the like, constructs a direct current protection system state evaluation index system from multiple angles such as safe operation, equipment reliability, operation and maintenance and the like, calculates and analyzes the acquired data through a multi-target planning method, considers the processing and unification of various data indexes, fully utilizes the index data degrees of all angles, improves the reliability of the state evaluation of the direct current protection system, and provides important operation and maintenance basis for equipment operation and maintenance units.
It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but also includes other embodiments that can be derived from the technical solutions of the present invention by those skilled in the art.
Claims (4)
1. A direct current protection system state comprehensive evaluation method based on multi-objective programming is characterized by comprising the following steps: comprises the following steps
The method comprises the following steps: analyzing the influence factors of the state evaluation of the direct current protection system, and constructing a direct current protection system state evaluation index system;
step two: solving an index weight value by adopting a multi-target planning weighting method based on the DC protection system state evaluation index system constructed in the first step, and establishing a DC protection system state evaluation model;
step three: and comprehensively evaluating the state of the direct current protection system to obtain an evaluation value F of the state of the direct current protection system.
2. The multi-objective programming-based comprehensive evaluation method for the state of the direct current protection system according to claim 1, characterized in that: step one, constructing a direct current protection system state evaluation index system from multiple angles such as safe operation, equipment reliability, operation and maintenance, and the like, wherein a detailed index calculation formula is as follows:
(1) safe operation index M1
Safe operation index M of direct current protection system1Including protection of correct action rate M11Protection of the fast excision Rate M12And the protection device commissioning rate M13The calculation formula is as follows:
a) protection of correct action rate M11
M11＝F/E*100％ (1)
In the formula, F is the number of correct actions of relay protection; e is the total number of relay protection actions;
b) protection of fast resection Rate M12
M12＝X/T*100％ (2)
In the formula, X represents the number of times of actual fault quick removal; t total number of times fault should be removed rapidly;
c) the commissioning rate M of the protection device13
M13＝Y/S*100％ (3)
In the formula, Y represents the time when the protection put into the system is in an operating state; s, the main protection is required to be put into operation for the total time;
(2) equipment reliability index M2
Equipment reliability index M2Including the failure rate M of the DC primary equipment21Protection family defect rate index M22Failure rate M of protection device23Their calculation formulas are respectively as follows:
a) primary equipment failure rate M21
M21＝t/(t+T)*100％ (4)
In the formula, t represents the total duration of one-time equipment failure in the system; t represents the accumulated normal working time of primary equipment in the system;
b) protection family Defect Rate index M22
M22＝B/C*100％ (5)
In the formula, B is the total number of the family defects of the relay protection equipment; c is the total number of the relay protection equipment of the specific direct current system;
c) failure rate M of protection device23
M23＝D/C*100％ (6)
In the formula, D is the total number of the relay protection equipment with failure; c is the total number of the direct current protection system reliability systems in a batch;
(3) operation and maintenance index M3
The operation and maintenance index of the direct current protection system can be completed by the maintenance completion rate M31And protection countermeasure completion rate M32Two indexes are considered, and the calculation formula is as follows:
a) maintenance completion rate M31
M31＝P/Q*100％ (7)
In the formula, P represents the number of devices which have completed maintenance tasks in the direct current protection system; q represents the total number of the devices planned to be overhauled in the direct-current protection system;
b) protection countermeasure completion rate M32
M32＝R/K*100％ (8)
In the formula, R represents the number of counter measures which are completed in time; k represents the total number of actions that should be completed.
3. The multi-objective programming-based comprehensive evaluation method for the state of the direct current protection system according to claim 1, characterized in that: the concrete implementation process of the second step is as follows:
(1) relative membership matrix of construction index
According to the factRunning data to form q candidate schemes, wherein each scheme needs to consider p indexes and uses xjkThe k index in the j scheme is expressed, and the target matrix (x) can be obtainedjk)p×qSelecting formula of relative membership degree to x for eliminating influence of different dimensionsjkNormalized as follows:
1) when the evaluation value is positively correlated with the index value,
2) when the evaluation value is negatively correlated with the index value,
3) the index value is a fixed value
When the evaluation value is the highest, the evaluation value is calculated,
4) the index value is in a certain range [ dj,d'j]The time-assessment value is the highest,
wherein, DeltajTo represent
σjRepresents max { d }j-djmin,djmax-d'jThen, a relative membership matrix R ═ R (R) of the indices can be obtainedjk)p×qThe higher the relative membership of the index is, the better the index value of the scheme is, and a relatively optimal scheme is defined as a base point scheme, namely G0＝(1,1,…,1,1)T；
(2) Determining a weight vector
Let W be (ω) as the weight vector corresponding to p indices1,ω2,…,ωp-1,ωp)TThe closer scheme k is to scheme G0The smaller the deviation, the more likely the solution is to be selected, and the deviation from the optimal solution can be measured by equation (13) when the solution k is adopted:
obviously, gkThe smaller the (. omega.) the better;
(3) establishing a multi-objective planning model
The multi-objective planning model is built accordingly as follows:
since each scheme is independent of the others, the problem of planning the targets can be decomposed into a plurality of single-target planning problems, i.e.
(4) Calculating the weight
The lagrange function is constructed as follows:
calculating the partial derivatives thereof to satisfy
The formula is solved to obtain
Normalizing the obtained weight to obtain
4. The multi-objective planning method for comprehensive evaluation of the state of the direct current protection system according to claim 1, characterized in that: the concrete implementation process of the third step is as follows:
according to the actual situation, comprehensively calculating the indexes of each direct current protection system state evaluation to obtain index scores, then multiplying each index score by a weighted value, and summing in sequence to obtain a direct current protection system state evaluation value F, wherein the calculation steps are as follows:
wherein M isiThe calculated value of the ith index in the state evaluation index system of the direct current protection system is obtained by questionnaire survey or on-site actual measurement; wiIs the weighted value of the ith index.
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| CN113285834A (en) * | 2021-05-26 | 2021-08-20 | 国网四川省电力公司经济技术研究院 | Multi-target planning empowerment evaluation method of perception and communication integrated network |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268429A (en) * | 2013-06-07 | 2013-08-28 | 中国南方电网有限责任公司超高压输电公司 | Performance evaluating method and system for high-voltage direct-current (DC) power transmission system 100Hz protection |
| CN104077493A (en) * | 2014-07-12 | 2014-10-01 | 东北电力大学 | Method for constructing state evaluation index system of electric relaying protection system |
| CN104539051A (en) * | 2014-12-30 | 2015-04-22 | 国家电网公司 | Online evaluation system of secondary equipment of intelligent substation |
| CN105224760A (en) * | 2015-10-19 | 2016-01-06 | 重庆大学 | A kind of VSC-HVDC grid-connected system reliability calculation method based on wind energy turbine set |
| WO2017083141A1 (en) * | 2015-11-10 | 2017-05-18 | Schlumberger Technology Corporation | Electric submersible pump health assessment |
| CN107633354A (en) * | 2017-09-08 | 2018-01-26 | 国家电网公司 | A kind of integrated evaluating method stood with straight-flow system running status health degree |
-
2019
- 2019-10-16 CN CN201910983296.6A patent/CN110795680B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268429A (en) * | 2013-06-07 | 2013-08-28 | 中国南方电网有限责任公司超高压输电公司 | Performance evaluating method and system for high-voltage direct-current (DC) power transmission system 100Hz protection |
| CN104077493A (en) * | 2014-07-12 | 2014-10-01 | 东北电力大学 | Method for constructing state evaluation index system of electric relaying protection system |
| CN104539051A (en) * | 2014-12-30 | 2015-04-22 | 国家电网公司 | Online evaluation system of secondary equipment of intelligent substation |
| CN105224760A (en) * | 2015-10-19 | 2016-01-06 | 重庆大学 | A kind of VSC-HVDC grid-connected system reliability calculation method based on wind energy turbine set |
| WO2017083141A1 (en) * | 2015-11-10 | 2017-05-18 | Schlumberger Technology Corporation | Electric submersible pump health assessment |
| CN107633354A (en) * | 2017-09-08 | 2018-01-26 | 国家电网公司 | A kind of integrated evaluating method stood with straight-flow system running status health degree |
Non-Patent Citations (1)
| Title |
|---|
| 徐长宝;王玉磊;赵立进;高吉普;黄良;应黎明;: "基于信息趋势预测和组合赋权的智能变电站继电保护***状态模糊综合评价" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113285834A (en) * | 2021-05-26 | 2021-08-20 | 国网四川省电力公司经济技术研究院 | Multi-target planning empowerment evaluation method of perception and communication integrated network |
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