Method for adjusting super real-time coincidence time sequence based on transient power angle stability margin

A technology of transient power angle stabilization and coincidence timing, applied to AC network circuits, electrical components, circuit devices, etc., can solve problems such as mismatching of operating modes and fault locations

Active Publication Date: 2012-04-04
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide a super real-time coincidence sequence setting method based on the transient power angle stability margin, optimize the coincidence scheme through the transient power angle change

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  • Method for adjusting super real-time coincidence time sequence based on transient power angle stability margin
  • Method for adjusting super real-time coincidence time sequence based on transient power angle stability margin
  • Method for adjusting super real-time coincidence time sequence based on transient power angle stability margin

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[0068] The present invention will be further explained below in conjunction with the drawings and embodiments, but the protection scope of the present invention is not limited to the content.

[0069] Such as figure 2 As shown, the super-real-time coincidence timing setting method based on the transient power angle stability margin of the present invention is applied in a 3-machine 9-node standard system. The parameters of the 3-machine 9-node standard system are shown in Tables 1 to 4.

[0070] Table 1 Three-machine 9-node standard system node parameters

[0071]

[0072] Table 2 3-machine 9-node standard system line standard per unit parameter (unit: pu)

[0073] Line head node name Voltage reference (kV) Line head node name Voltage reference (kV)resistance Reactance Admittance (B / 2) Bus 1230.0 Bus A230.00.010.0850.044 Bus 1230.0 Bus B230.00.0170.0920.0395 Bus A230.0 Bus 2230.00.0320.1610.0765 Bus B230.0 Bus 3230.00.0390.170.0895 Bus 2230.0 Bus C230.00.00850.0720.03725 ...

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Abstract

The invention relates to a method for adjusting a super real-time coincidence time sequence based on transient power angle stability margin, which belongs to the technical field of power system stabilization and control. When the alternating current power transmission line has a malfunction, online identification is carried out on an admittance parameter by using a least square method according to the practically measured data such as electromagnetic power and a power angle after breaker tripping caused by the malfunction provided by a wide area measurement system (WAMS); the identified admittance array is modified to simulate head end coincidence and tail end coincidence of the power transmission line respectively; a system change track in two coincidence time sequences is predicted by using a predictor-corrector method and is subjected to quantitative evaluation by using an extended equal area criterion (EEAC) to obtain a transient power angle stability margin index; and the coincidence time sequence with larger transient power angle stability margin is selected as an optimized coincidence scheme. The method has high prediction accuracy, and can solve the problem that the operation mode of the coincidence time sequence scheme obtained by using the traditional ''offline calculation, online matching'' method is mismatched with the malfunction position, and the like.

Description

technical field [0001] The invention relates to a super-real-time coincidence sequence setting method based on a transient power angle stability margin, and belongs to the technical field of power system stability and control. Background technique [0002] At present, the emergency control in the second line of defense of the power system widely adopts the "offline calculation, online matching" control scheme. In order to solve the problem of working condition mismatch in the actual application of the strategy table calculated offline, Chinese scholars proposed a stable control framework of "online pre-decision and real-time matching" that can realize quasi-real-time tracking of the system in 1993. The online predisicion system (OPS-online predisicion system) developed by Guodian Automation Research Institute has been applied in Henan Power Grid, Jiangsu Power Grid and Shandong Power Grid since its first successful application in 1999 in Eastern Shaanxi Power Grid. With the...

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Application Information

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IPC IPC(8): H02J3/00
Inventor 束洪春孙士云孙向飞董俊
Owner KUNMING UNIV OF SCI & TECH
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