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As the penetration of large-scale grid-connected wind farms increasing year by year, low voltage ride-through (LVRT) capability are required by many countries for power quality and fail-safe operation at grid fault. A new dynamic strategy using dynamic voltage restorer (DVR) is proposed in this paper to improve LVRT capability of wind turbine generators (WTGs). During the voltage dip, LVRT-DVR will...
First of all, the paper introduces great importance and significant advantages of electrified railway for our nation. And then negative effects to the grid's power quality brought by electrified railway are emphasized, followed by typical solutions such as the dynamic compensation strategy, among which compensator based on STATCOM technology shows the best general performance. Finally, the paper presents...
Impact loads require STATCOM to have fast and robust performances. Based on the analysis of mathematic model, a decoupling control method of STATCOM is investigated in this paper. This method is implemented in two industrial STATCOMs and presents satisfied control capabilities. The compensated PCCs of impact loads obtain significant improvements of power quality.
The negative phase sequence (NPS) current, reactive current (VAR) and harmonic current in electrified railway power supply system can be compensated by the railway static power conditioner (RPC). Based on the analysis of NPS current and reactive current decoupling, two control strategies for different objectives priority of RPC applied with asymmetrical transformers is proposed. It makes the PRC achieve...
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