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 in AC network circuits, electrical components, circuit devices, etc., and can solve problems such as operating mode and fault location mismatch.

Active Publication Date: 2014-09-03
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 trajectory and stability margin, and solve the traditional "offline" while improving the prediction accuracy. The problem of the mismatch between the operation mode and the fault location in the method of calculation and online matching

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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 described below in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention is not limited to the content described.

[0069] Such as figure 2 As shown, the present invention's ultra-real-time coincidence sequence setting method based on transient power angle stability margin is applied in the 3-machine 9-node standard system, and the parameters of the 3-machine 9-node standard system are shown in Table 1-Table 4.

[0070] Table 1 Node parameters of standard system with 3 machines and 9 nodes

[0071]

[0072] Table 2 3-machine 9-node standard system circuit standard parameters (unit: pu)

[0073] The name of the node at the head end of the line Voltage reference (kV) The name of the node at the head end of the line Voltage reference (kV) resistance Reactance Admittance (B / 2) bus 1 230.0 Bus A 230.0 0.01 0.085 0.044 bus 1 230.0 Bu...

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Abstract

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. When the AC transmission line fails, according to the measured data such as the electromagnetic power and power angle after the circuit breaker trips caused by the fault provided by the Wide Area Information Acquisition System (WAMS), the admittance parameters are identified online by the least square method, and the identification is modified The obtained admittance array simulates the coincidence at the beginning and the end of the line respectively, and uses the predictive correction method to predict the system change trajectory under the two coincidence time series, and uses the extended equal area criterion method (EEAC) to quantitatively evaluate it, and obtains the transient state For the power angle stability margin index, the coincidence sequence corresponding to the larger transient power angle stability margin is selected as the optimized coincidence scheme. It has the advantages of high prediction accuracy, and can solve the problem of mismatching operation mode and fault location of coincident timing schemes obtained by using the traditional "offline calculation, online matching" method.

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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Patent Type & Authority Patents(China)
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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