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Method for regulating voltage of key node of grid polymerization based on measurement of phasor measurement unit

A technology of phasor measurement unit and node voltage, which is applied in the direction of AC network voltage adjustment, etc., and can solve the problems of low control accuracy and cumbersome calculations

Active Publication Date: 2015-02-18
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0004] The key node voltage control method of grid aggregation based on the traditional node voltage equation has the disadvantages of cumbersome calculation and low control accuracy.

Method used

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  • Method for regulating voltage of key node of grid polymerization based on measurement of phasor measurement unit
  • Method for regulating voltage of key node of grid polymerization based on measurement of phasor measurement unit
  • Method for regulating voltage of key node of grid polymerization based on measurement of phasor measurement unit

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Embodiment Construction

[0070] The key node control method of grid aggregation based on phasor measurement unit measurement of the present invention comprises the following steps:

[0071] 1) Analysis of the relationship between node voltage vector and current vector

[0072] In the wide-area measurement environment, the errors caused by the measurement link are ignored, and the bus voltage and current injection vectors are known. Then, for a power grid with n nodes and the earth as the reference node, it is assumed that the structure of the power grid does not change , according to the power grid analysis theory, the relationship between the node voltage and the current vector is expressed in the following linear form:

[0073] z 11 I · 1 + z ...

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Abstract

The invention discloses a method for regulating voltage of key node of grid polymerization based on measurement of a phasor measurement unit in a wide-area environment. The method is characterized by comprising the following steps: analyzing a relation between voltage vectors and current vectors of nodes, analyzing a relation between the voltage vectors of the nodes and power, regulating voltage of the key node of a polymerization grid in the wide-area environment, and solving a key node voltage regulating model by a nonlinear least square method. According to the method, the analytic relation between the voltage vectors of the nodes and the power is obtained by virtue of the relation between the voltage vectors and the current vectors of the grid nodes; the definition of grid polymerization and a regulation relation between the voltage vectors of the nodes and the power are obtained on the basis of the analytic relation in the wide-area measurement environment; a regulation equation for grid polymerization to the key node is further obtained without taking an out-of-limit power transmission circuit trend into account. The method is scientific and reasonable as well as simple and feasible, and is accurate in regulation, high in applicability and suitable for simplified analysis, on-line monitoring and real-time control of the grid.

Description

technical field [0001] The invention relates to a key node voltage regulation and control method for grid aggregation based on phasor measurement unit measurement, which is suitable for simplified calculation, online safety monitoring and regulation of the grid. Background technique [0002] As the wide-area measurement system (Wide-Area Measurement System, WAMS) of the power grid is increasingly perfected and widely popularized, various states of the power system operation, such as node voltage phasors, node current phasors, transmission line power, The panoramic process of information such as the current vector of the transmission line is observable, and such high-dimensional data is transmitted to the system operation, scheduling, and control personnel at a high rate of growth rate. How to mine the potential laws in these massive data has become a new situation urgent task. [0003] For the regulation of node voltage, how to mine the analytical law between the node volta...

Claims

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Application Information

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IPC IPC(8): H02J3/12
CPCH02J3/12
Inventor 李介夫王吉邹刚于伟东杜轲琼韩洁平王燕涛闫晶
Owner STATE GRID CORP OF CHINA
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