A Subsynchronous Oscillation Evaluation Method for Power System

A sub-synchronous oscillation and power system technology, applied to electrical components, circuit devices, AC network circuits, etc.

Active Publication Date: 2017-08-25
STATE GRID JIANGSU ECONOMIC RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no research results on how UPFC affects power system subsynchronous oscillations have been made public. Therefore, it is urgent to study the behavior of subsynchronous oscillations in power systems including unified power flow controllers. From the UPFC component model, analyze power system subsynchronous Model establishment and evaluation of resonant frequency and evaluation of UPFC parameter changes on subsynchronous oscillation, etc., to provide guidance for power system planning and operation

Method used

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  • A Subsynchronous Oscillation Evaluation Method for Power System
  • A Subsynchronous Oscillation Evaluation Method for Power System
  • A Subsynchronous Oscillation Evaluation Method for Power System

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Embodiment Construction

[0030] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0031] In order to facilitate the public's understanding, the technical solution of the present invention will be described in detail below with a preferred embodiment.

[0032] The subsynchronous oscillation evaluation method in the embodiment of the present invention includes the following steps:

[0033] Step 1. Establish an equivalent model for UPFC subsynchronous oscillation research.

[0034] In order to study and analyze the subsynchronous oscillation of the power system including UPFC, it is first necessary to construct a reasonable equivalent model for UPFC subsynchronous oscillation research. The basic structure of UPFC is as figure 1 shown. Let the UPFC parallel point voltage be Current is It flows into the parallel converter from the parallel point, generally with impedance Z E = r E +jωl E The impedance of the equivalent parallel ...

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Abstract

The invention discloses a subsynchronous oscillation evaluation method of a power system including a Unified Plow Flow Controller (UPFC for short), and belongs to the technical field of power system planning and operation. The invention first establishes the equivalent research model of the subsynchronous oscillation of the unified power flow controller; and then performs appropriate equivalent simplification on the power system according to the grid structure and the actual installation conditions of the generator and UPFC, and obtains the equivalent from the generator to the UPFC Model; Finally, the subsynchronous oscillation behavior of the power system is evaluated and predicted by using the equivalent model from the generator to the UPFC. The invention realizes the sub-synchronous oscillation evaluation of the power system containing UPFC, and can be used to guide the planning and safe and stable operation of the power grid.

Description

technical field [0001] The invention relates to a power system evaluation method, in particular to a subsynchronous oscillation evaluation method of a power system including a unified power flow controller (UPFC for short), and belongs to the technical field of power system planning and operation. Background technique [0002] Modern power systems put forward higher and higher requirements for the safety, reliability and economy of power. Series capacitor compensation technology and flexible AC transmission (FACTS) technology are one of the effective measures to solve the above problems, but in the huge economic While benefiting, it also brings some problems to the safe and stable operation of the power system. One of the problems is the subsynchronous oscillation SSO of the power system. Subsynchronous oscillation belongs to the oscillation instability of the system. It is caused by a special electromechanical coupling in the power system. The biggest harm is that the sever...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06Q10/04G06Q50/06
Inventor 黄俊辉高山杨晓梅王海潜赵欣谢珍建陆军祁万春季杭为江溯帆蔡晖吴晨乔黎伟李琥王旭杨林汪惟源窦飞
Owner STATE GRID JIANGSU ECONOMIC RES INST
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