Online voltage stabilization assessment method for alternating current and direct current system based on wide-area measurement
An AC/DC system, voltage stabilization technology, applied in AC network circuits, system integration technology, power transmission AC network, etc. Online application requirements and other issues to achieve the effect of evaluating voltage stability
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[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0037] Such as figure 1 As shown, the online voltage stability assessment of AC and DC systems based on wide-area measurement includes the following steps:
[0038] (1) Determine the AC-DC hybrid system, and clarify its network topology, AC system admittance matrix information, DC system and other parameter information;
[0039] (2) Based on the PMU measurement, obtain the node voltage and current amplitude and phase of each generator and load node, the voltage and current phase and amplitude of the DC system converter station busbar, the firing angle of the rectifier and the inverter arc extinguishing angle;
[0040] (3) Using the measurement information of the converter station, based on the quasi-steady-state model of the DC system, an online equivalent model of each converter is established, and the dynamic characteristics of the converter are cha...
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