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Multi-stability problem matrix type quantification index calculation and AC-DC coordination control method

A technology of AC-DC coordination and control method, which is applied in the field of matrix quantitative index calculation and AC-DC coordination control strategy

Active Publication Date: 2017-09-19
NARI TECH CO LTD +4
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is: in order to improve the identification ability of controlling negative effects and overshooting phenomena to various stability problems, master the emergency control strategy of system transient stability under complex stability problems, provide a technical basis for transient stability emergency control, and provide a Matrix Quantitative Index Calculation and AC-DC Coordinated Control Method for Solving Various Stability Problems

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  • Multi-stability problem matrix type quantification index calculation and AC-DC coordination control method

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Embodiment 1

[0059] An embodiment of the present invention, its steps are as figure 1 shown.

[0060] figure 1 In step 1, it is described that the system transient stability time-domain simulation is performed on the typical disturbance of the AC-DC line, and the system stability margin is calculated based on the EEAC method, including the power angle stability margin η δ , voltage stability margin η v and the frequency stability margin η f ; Define multiple stability problems as η δ , η v and η f There must be at least one less than 0.

[0061] figure 1 In step 2, it is described that, for each control measure, a variety of quantitative indicators of stability problems of each control measure are obtained based on the perturbation method, and the various quantitative indicators of stability problems include the quantitative indicator of power angle stability L δ , Voltage stability quantitative index L V and the frequency stability quantification index L f ,in:

[0062] Power A...

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Abstract

The invention discloses a multi-stability problem matrix type quantification index calculation and AC-DC coordination control method, and belongs to the power system and automation technical filed; the multi-stability problem matrix type quantification evaluation index and method based on transient kinetic energy improvement and perturbation sensitivity can fully consider single stability and integral stability control effect, control negative effect and overshoot control; the method uses a multi-stability problem influence factor matrix to evaluate the stability-problem dynamic improvement effect in a control measure application process, considers target functions with the smallest control cost and the biggest multi-stability problem weight index, thus determining the best AC-DC emergency control strategy, and improving the adaptability of the emergency control algorithm processing complex stability conditions. The method allows power system operation personnel to handle complex system internal running rules, and provides basis for coordinating and making the transient stability emergency control strategy, thus improving the system safety stability control validity and online automation calculating level.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to the calculation of matrix quantitative indexes and AC / DC coordination control strategies for various stability problems. Background technique [0002] At present, the grid structure of large-scale grid interconnection, UHV AC and DC transmission, and long-distance large-capacity resource energy has greatly changed the characteristics of the grid. In order to grasp the dominant factors, research on stability issues tends to isolate power angle, voltage, and frequency issues stand up. At present, most of the stability control measures of the power grid are also aimed at a single stability problem, such as machine shedding and load shedding when the power angle is stable, low-voltage load shedding when the voltage is stable, and low-frequency load shedding or high-frequency machine shedding when the frequency is stable. ...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/24G06F17/50
CPCG06F30/20H02J3/00H02J3/001H02J3/24H02J2203/20Y02E40/50Y02E60/60
Inventor 张红丽牛拴保刘福锁李威魏平柯贤波王吉利
Owner NARI TECH CO LTD
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