A Modeling Method for Medium and Long-Term Dynamic Simulation Stability Strategy Based on Virtual Grid

Abstract

The invention discloses a virtual power grid-based medium- and long-term dynamic simulation safety strategy modeling method, and relates to the technical field of safe and stable analysis and estimation of a power system. According to the virtual power grid-based medium- and long-term dynamic simulation safety strategy modeling method, by building a virtual power grid comprising virtual electricalcomponents such as a virtual circuit, a virtual load and a virtual power generator, bridge connection of fault judgment condition and measure control signal in an automatic safety device model and astable control strategy model of a PSD-FDS program is achieved, the combined calling of the automatic safety device model and the stable control strategy model is further completed, and modeling and verification of a multi-criteria safe and stable strategy of the complicated power grid are achieved.

Description

Technical field [0001] The invention belongs to the technical field of power system safety and stability analysis and evaluation, and in particular relates to a medium and long-term dynamic simulation stability strategy modeling method based on a virtual power grid. Background technique [0002] The power industry is a basic industry in modern society. The operation of the power system is related to all aspects of social and economic life. Safe, economic, continuous and stable power supply is the basic requirement for power work. Various types of faults occur in various equipment of the power system, including primary equipment such as generators, transformers, power transmission lines, circuit breakers, and the secondary equipment associated with them, which affect the normal operation of the power system and the normal power supply to users. In order to ensure the safe operation of the power system, supporting safety and stability control devices and systems (hereinafter referr...

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Problems solved by technology

[0005] Due to the functional limitations of the PSD-FDS program itself, the safety automatic device model and the stability control strategy model cannot be used together

The stability control strategy trigger condition model (STAB COND) provides the identification of section N-M faults, identification of branch fault types, identification of AC branch switching status, identification of AC branch transmission power, identification of section transmission power and faults in the safety automatic device model The judgment conditions (overload, low frequency, low voltage, high frequency, overvoltage) do not overlap, and the safety automatic device model and the stability control strategy model have relatively independent control measure cards, which cannot be called each other

In view of the fact that the stability strategy in the actual operation of the modern power system is usually composed of multiple strategy start judgment objects and multiple anti-misjudgment based on a certain logical relationship, and implements complex control measures, and the model provided in PSD-FDS is not enough at present. To fully cover complex stabilization strategies and control actions in actual systems

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