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Receiving-end network voltage stabilization overall process situation assessment and prevention and control method based on responses

A technology for voltage stability and situation assessment, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of transient voltage stability rapid assessment and adaptive control research and engineering applications

Active Publication Date: 2013-09-04
STATE GRID CORP OF CHINA +2
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Problems solved by technology

However, there is almost no research and engineering application on the rapid evaluation of transient voltage stability and adaptive control based on WAMS system.

Method used

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  • Receiving-end network voltage stabilization overall process situation assessment and prevention and control method based on responses
  • Receiving-end network voltage stabilization overall process situation assessment and prevention and control method based on responses
  • Receiving-end network voltage stabilization overall process situation assessment and prevention and control method based on responses

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Embodiment Construction

[0067] The specific implementation manner of the present invention will be described in further detail below according to the accompanying drawings.

[0068] The present invention provides a response-based situation assessment and prevention and control method for the whole process of receiving-end power grid voltage stability, including the following steps:

[0069] Step S1, obtaining various offline simulation data or real-time measurement data, and transferring them to static data format files or transient data format files respectively according to the scenes corresponding to the obtained data;

[0070] The off-line simulation data is transient fault time-domain simulation data, and the real-time measurement data is power grid data measured in real time by SCADA system, EMS, WAMS, DTS or DCS;

[0071] Step S2, for all grid components connected to any node, count the equivalent power P flowing through the node according to the active power flow direction E +jQ E , constru...

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Abstract

The invention provides a receiving-end network voltage stabilization overall process situation assessment and prevention and control method based on responses. The method comprises the steps of S1, obtaining various off-line simulation data or real-time measuring data; S2, constructing equivalent power transmission models of nodes according to node practical transfer power; S3, obtaining a node quiescent voltage stability margin index Vsi of equivalent power transmission model parameters of each node; S4, constructing a node reactive compensation assessment index according to the equivalent power transmission model parameters of each node; S5, setting an early warning threshold value Ncr of the node quiescent voltage stability margin index, and calculating a load shedding estimation of a weaker node when the quiescent voltage stability margin index Vsi of each node is smaller than the Ncr. According to the receiving-end network voltage stabilization overall process situation assessment and prevention and control method based on the responses, a weak node or a weak area in a current operating mode can be found out, a rapid estimation of reactive compensation levels and load shedding of each node is achieved, and the method can be widely applied to the fields of power network planning and online security monitoring.

Description

technical field [0001] The invention relates to the field of safety evaluation and auxiliary decision-making of receiving-end power grid voltage stability based on various power grid simulation or measurement data, and specifically relates to a response-based method for assessing and preventing and controlling the whole process of receiving-end power grid voltage stability. Background technique [0002] The continuous expansion of the scope of grid interconnection, the continuous deepening of the reform of the market-oriented system of the power industry, and the continuous connection of UHV AC and DC transmission and renewable energy power generation have increased the uncertainty and intermittency of grid operation, making the grid operating environment increasingly complex. It is complex, the probability of disturbance is greater, and the scope of influence is wider, which puts forward higher requirements for the safe and stable operation of the power grid and the preventi...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 马世英刘道伟仲悟之宋墩文陈勇侯俊贤张健王毅王虹富董毅峰张志强
Owner STATE GRID CORP OF CHINA
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