Real time evaluating method of voltage stability

Abstract

The invention provides a circuit tidal current index for resolving the problems such as that the high circuit tidal current causes the voltage decrease at the bus of the receiving end and the failure about the real solution of the circuit tidal current equation. The circuit tidal current index is applied for real-time voltage stabilization detection to provide a voltage stability real-time evaluation method, based on the circuit tidal current index. The method can simply and quickly evaluate the voltage stability of a power network and can scan and calculate the circuit tidal current index ofa full network line to fine the line of low voltage stability in the power network. Applied for the voltage stability real-time detection, the method can provide the change tread of the voltage stability of each line, to determine the initial point of the voltage stability problem.

Description

A real-time evaluation method of voltage stability technical field The invention relates to a real-time evaluation method for voltage stability, which belongs to the field of power system analysis and control, and power system voltage stability real-time analysis and control. Background technique Voltage collapse accidents may occur in the main grid or in some regional grids. They are sudden and concealed, and are often difficult to detect clearly in the early stages of formation. This requires real-time and continuous monitoring of the operating status of the power system. At the same time, rapid data monitoring is required. Processing function and fast judgment function of system voltage stability, so as to find problems in time. The WAMS (WideAreaMeasurementsSystem, Wide Area Measurement System) system, which has received widespread attention in recent years, can capture real-time steady-state and dynamic information of various locations in a large-scale interconnected ...

AI Technical Summary

Problems solved by technology

In order to prevent voltage collapse accidents, dispatchers are most concerned about: how far is the current power system operating state from the collapse point or how much is the stability margin?

However, the calculation of this indicator is very large, and it is difficult to meet the requirements of real-time monitoring

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