CN109726873B - Communication node maintenance priority ordering method considering information physical coupling - Google Patents
Communication node maintenance priority ordering method considering information physical coupling Download PDFInfo
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Abstract
The invention provides a communication node overhaul priority ranking method considering information physical coupling, and belongs to the field of power information physical systems. The method comprises the steps of firstly, calculating an absolute value of a tidal current value of each branch of a power grid to obtain a load rate of each branch of the power grid, and constructing a load rate matrix; generating an augmented power generation transfer factor matrix; calculating a sensitivity matrix considering physical importance based on the load rate matrix and the augmented power generation transfer factor matrix; then calculating the importance index of the communication node corresponding to each power grid node; and finally, arranging the communication nodes in a descending order according to the importance indexes of the communication nodes to obtain a communication node maintenance priority ordering scheme. The method can be applied to the establishment of communication node maintenance schemes of the power communication network, and the importance of the communication nodes is quantitatively evaluated from the angle of information physical coupling, so that the maintenance priority of the communication nodes is determined, and a scheme with better reliability and more reasonable reliability for a power system is obtained.
Description
Technical Field
The invention belongs to the field of power information physical systems, and particularly relates to a communication node overhaul priority ordering method considering information physical coupling.
Background
In the power system, the safe operation of the physical power grid is increasingly not separated from the measurement and control of the communication side, so that the modern power system becomes a power information physical coupling system. The importance evaluation of the communication node is also not isolated from its impact on the physical side control. The control requirements for the communication nodes are different in different physical grid load flow situations. At present, a dispatcher on a secondary side of an electric power system often difficultly evaluates the importance of a communication node from the perspective of a primary side, so that the most reasonable communication node maintenance scheme is formulated. In order to ensure safe and reliable operation of the power grid, important communication nodes should have a high maintenance priority. The mode importance of the actual communication nodes in different physical states is different, so that workers in an actual field often cannot determine the most important communication node for a physical system, the maintenance plan is not reasonable enough, and the reliability of the important communication node cannot be guaranteed most reasonably. Therefore, it is necessary to evaluate the importance of the communication nodes from the perspective of information physical coupling, so as to reasonably formulate a maintenance prioritization scheme for the communication nodes.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a communication node overhaul priority ranking method considering information physical coupling. The method can be applied to the establishment of the communication node maintenance scheme of the power communication network, and the importance of the communication node is quantitatively evaluated from the angle of information physical coupling, so that the maintenance priority of the communication node is determined.
The invention provides a communication node overhaul priority ranking method considering information physical coupling, which is characterized in that the method comprises the steps of firstly calculating the absolute value of the tidal current value of each branch of a power grid, obtaining the load rate of each branch of the power grid, and constructing a load rate matrix; generating an augmented power generation transfer factor matrix; calculating a sensitivity matrix considering physical importance based on the load rate matrix and the augmented power generation transfer factor matrix; then calculating the importance index of the communication node corresponding to each power grid node; and finally, arranging the communication nodes in a descending order according to the importance indexes of the communication nodes to obtain a communication node maintenance priority ordering scheme. The method specifically comprises the following steps:
1) calculating the tidal current value P of each branch of the power gridiAbsolute value of | PiL, where subscript i is a branch number, i is 1,2, and L is a total number of branches;
2) calculating the load rate Ratio of each branch of the power gridi,i＝1,2...,L：
Wherein, Pi maxRepresenting the upper limit of the power flow capacity of each branch of the power grid;
3) constructing a load rate matrix R; the method comprises the following specific steps:
3.1) comparing the load rate Ratio of each branch of the power gridiSequentially arranging the i-1, 2, L according to branch numbers to construct a row vector Ratio;
3.2) repeating the row vector Ratio for N times according to rows to construct a load rate matrix R with N rows and L columns, wherein N is the total number of the grid nodes;
4) generating an augmented power generation transfer factor matrix G;
calculating the sensitivity of each power grid node N to the tidal current value of each branch of the power grid one by one based on a sensitivity method, wherein N is 1, 2; gmnThe element representing the mth row and the nth column in the G is obtained by calculating the sensitivity of the nth node of the power grid to the mth branch of the power grid;
5) calculating the absolute value of the augmented power generation transfer factor matrix G:
Gabs＝|G|\*MERGEFORMAT (2)
6) the sensitivity matrix S is calculated taking into account the physical importance:
S＝(Gabs.*R)T\*MERGEFORMAT (3)
wherein, the matrix dot multiplication symbol is represented, corresponding elements of the two matrixes are multiplied, and the superscript T represents the transposition of the matrix;
7) summing each column vector of the sensitivity matrix S considering the physical importance to obtain new column vectors, wherein each new column vector is a communication node importance index E corresponding to each power grid noden,n＝1,2,...N；
8) And arranging the communication nodes in a descending order according to the corresponding communication node importance indexes to obtain a communication node overhaul priority ordering scheme.
The invention has the characteristics and beneficial effects that:
the method can be applied to the establishment of communication node maintenance schemes of the power communication network, the importance of the communication nodes is quantitatively evaluated from the angle of information physical coupling, and the evaluation method can consider the influence capacity of the communication nodes on the physical power network. And (4) sequencing the influence capacity of the communication nodes on the physical power grid according to the establishment of the maintenance scheme, and finally determining the maintenance priority of the communication nodes. The communication node with high importance has higher overhaul priority. By considering the communication node overhaul priority sequencing of the information physical coupling, a scheme with better and more reasonable reliability for the power system can be obtained.
Detailed Description
The invention provides a communication node overhaul priority ranking method considering information physical coupling, which is further described below by combining with specific embodiments.
The invention provides a communication node overhaul priority ranking method considering information physical coupling, which is characterized in that the method comprises the steps of firstly calculating the absolute value of the tidal current value of each branch of a power grid, obtaining the load rate of each branch of the power grid, and constructing a load rate matrix; generating an augmented power generation transfer factor matrix; calculating a sensitivity matrix considering physical importance based on the load rate matrix and the augmented power generation transfer factor matrix; then calculating the importance index of the communication node corresponding to each power grid node; and finally, arranging the communication nodes in a descending order according to the importance indexes of the communication nodes to obtain a communication node maintenance priority ordering scheme. The method specifically comprises the following steps:
1) calculating the tidal current value P of each branch of the power gridiAbsolute value of | PiL, where subscript i is a branch number, i is 1,2, and L is a total number of branches;
2) calculating the load rate Ratio of each branch of the power gridi,i＝1,2...,L：
Wherein, Pi maxRepresenting the upper limit of the power flow capacity of each branch of the power grid;
3) constructing a load rate matrix R; the method comprises the following specific steps:
3.1) comparing the load rate Ratio of each branch of the power gridiSequentially arranging the i-1, 2, L according to branch numbers to construct a row vector Ratio;
3.2) repeating the row vector Ratio for N times according to rows to construct a load rate matrix R with N rows and L columns, wherein N is the total number of the grid nodes;
4) generating an augmented power generation transfer factor matrix G;
calculating the sensitivity of each power grid node N to the tidal current value of each branch of the power grid one by one based on a sensitivity method, wherein N is 1, 2; gmnAnd the element representing the mth row and the nth column in the G is obtained by calculating the sensitivity of the nth node of the power grid to the mth branch of the power grid.
5) Calculating the absolute value of the augmented power generation transfer factor matrix G:
Gabs＝|G|\*MERGEFORMAT (2)
6) the sensitivity matrix S is calculated taking into account the physical importance:
S＝(Gabs.*R)T\*MERGEFORMAT (3)
where denotes the matrix dot-by-dot sign, the respective corresponding elements of the two matrices are multiplied, and the superscript T denotes the transpose of the matrix.
7) Summing each column vector of the sensitivity matrix S considering the physical importance to obtain new column vectors, wherein each new column vector is a communication node importance index E corresponding to each power grid nodenN is 1,2. The communication nodes are communication nodes in the power communication network, which correspond to the power grid nodes one to one.
8) And arranging the communication nodes in a descending order according to the corresponding communication node importance indexes to obtain a communication node overhaul priority ordering scheme, wherein the communication nodes with high importance indexes are overhauled preferentially.
Claims (1)
1. A communication node overhaul priority ranking method considering information physical coupling is characterized in that the method comprises the steps of firstly calculating an absolute value of a tidal current value of each branch of a power grid to obtain a load rate of each branch of the power grid, and constructing a load rate matrix; generating an augmented power generation transfer factor matrix; calculating a sensitivity matrix considering physical importance based on the load rate matrix and the augmented power generation transfer factor matrix; then calculating the importance index of the communication node corresponding to each power grid node; finally, arranging all the communication nodes in a descending order according to the importance indexes of the communication nodes to obtain a communication node maintenance priority ordering scheme;
the method specifically comprises the following steps:
1) calculating the tidal current value P of each branch of the power gridiAbsolute value of | PiL, where subscript i is a branch number, i is 1,2, and L is a total number of branches;
2) calculating the load rate Ratio of each branch of the power gridi,i＝1,2...,L：
Wherein, Pi maxRepresenting the upper limit of the power flow capacity of each branch of the power grid;
3) constructing a load rate matrix R; the method comprises the following specific steps:
3.1) comparing the load rate Ratio of each branch of the power gridiSequentially arranging the i-1, 2, L according to branch numbers to construct a row vector Ratio;
3.2) repeating the row vector Ratio for N times according to rows to construct a load rate matrix R with N rows and L columns, wherein N is the total number of the grid nodes;
4) generating an augmented power generation transfer factor matrix G;
calculating the sensitivity of each power grid node N to the tidal current value of each branch of the power grid one by one based on a sensitivity method, wherein N is 1, 2; gmnThe element representing the mth row and the nth column in the G is obtained by calculating the sensitivity of the nth node of the power grid to the mth branch of the power grid;
5) calculating the absolute value of the augmented power generation transfer factor matrix G:
Gabs＝|G| (2)
6) the sensitivity matrix S is calculated taking into account the physical importance:
S＝(Gabs.*R)T (3)
wherein, the matrix dot multiplication symbol is represented, corresponding elements of the two matrixes are multiplied, and the superscript T represents the transposition of the matrix;
7) summing each column vector of the sensitivity matrix S considering the physical importance to obtain new column vectors, wherein each new column vector is a communication node importance index E corresponding to each power grid noden,n＝1,2,...N；
8) And arranging the communication nodes in a descending order according to the corresponding communication node importance indexes to obtain a communication node overhaul priority ordering scheme.
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| CN107204620A (en) * | 2017-07-18 | 2017-09-26 | 中国能源建设集团江苏省电力设计院有限公司 | A kind of THE UPFC site selecting method based on load voltage index |
| CN107292481A (en) * | 2017-04-26 | 2017-10-24 | 广东电网有限责任公司惠州供电局 | A kind of power network key node appraisal procedure based on pitch point importance |
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| CN107292481A (en) * | 2017-04-26 | 2017-10-24 | 广东电网有限责任公司惠州供电局 | A kind of power network key node appraisal procedure based on pitch point importance |
| CN107204620A (en) * | 2017-07-18 | 2017-09-26 | 中国能源建设集团江苏省电力设计院有限公司 | A kind of THE UPFC site selecting method based on load voltage index |
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