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On-line damping coordinated control method for multi-interval oscillation modes in UHV power system

A technology of oscillation mode and coordinated control, applied in the direction of reducing/preventing power oscillation, circuit devices, AC network circuits, etc., can solve problems such as large hazards, wide range of involvement, complex dynamic characteristics, etc., to improve damping, optimize output, To achieve the effect of preventive control

Active Publication Date: 2018-12-21
HOHAI UNIV +1
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Problems solved by technology

There are risks of multiple weakly damped interval oscillation modes in the UHV power grid, and there are many units involved in the large interval oscillation mode, which involves a wide range, great hazards, and complex dynamic characteristics. Therefore, how to carry out damping online monitoring and control has always been very difficult. At present, there is no complete set of tuning methods and principles. In addition, most of the existing operation control strategies are based on offline analysis. It is very urgent to find an online coordinated control method for multi-interval oscillation mode damping in UHV power grids.

Method used

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  • On-line damping coordinated control method for multi-interval oscillation modes in UHV power system
  • On-line damping coordinated control method for multi-interval oscillation modes in UHV power system
  • On-line damping coordinated control method for multi-interval oscillation modes in UHV power system

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Embodiment Construction

[0021] In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.

[0022] As shown in the accompanying drawings, in general, the multi-interval oscillation mode damping coordinated control method of the UHV power grid proposed by the present invention is based on multiple weak damping modes and damping ratio sensitivity information of the system, and adopts a multi-objective online optimization strategy based on mean square error , and use the genetic algorithm to optimize the output of the generating set, so as to improve the damping of multiple interval oscillation modes and realize the prevention and control of the power oscillation of the UHV grid.

[0023] In some specific examples, this is achieved through the following steps:

[0024] (1) Based on the current real-time power flow section of the system, combined with the dynamic model data, the power system ...

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Abstract

The invention relates to the technical field of electric power system, A method for coordinate control of damping of multiple interval oscillation mode in a UHV power network is disclosed, Based on the information of multiple weak damping modes and sensitivity of damping ratio, a multi-objective on-line optimization strategy based on mean square error is adopted, and the output of generator set isoptimized by using genetic algorithm, so as to improve the damping of multiple interval oscillation modes and realize the prevention and control of UHV power system oscillation.

Description

technical field [0001] The invention relates to the field of power system control, in particular to an online damping coordinated control method for multiple interval oscillation modes of an UHV power grid. Background technique [0002] With the construction of the current UHV power grid, the scale of the AC interconnection system continues to expand, the long-distance transmission capacity increases, and the system operation mode becomes increasingly complex. The power oscillation problem of the power grid is very prominent, which seriously affects the safe and stable operation of the UHV power grid. Since the UHV power grid realizes the interconnection of AC power grids in large areas, the oscillation mode of the power grid increases multiples, and there may be multiple weakly damped interval oscillation modes in the operation of the power grid. The root cause of low-frequency oscillation is that there is a negative damping or weakly damping oscillation mode in the power g...

Claims

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 余一平鞠平楼伯良金宇清孙维真黄弘扬彭琰陈新琪卢嘉华赵一琰孙卫娟陈峰顾望胡云旭李楠
Owner HOHAI UNIV
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