Abstract
With the increase of HVDC(high voltage direct current) transmission system, the new large-capacity synchronous condenser is the most suitable device to meet the dynamic reactive power demand of the power grid system. Therefore, it has gradually become one of the research hot topics. Based on this, the paper systematically summarizes the research status of the new synchronous condenser. Firstly, the operation principle of the synchronous condenser is introduced from four aspects: its reactive power characteristics, operation state and the typical type and control strategy. Secondly, by comparing it with power electronic reactive power compensation equipment, the superior dynamic reactive power output characteristics of the new synchronous condenser are expounded, and the influence factors are analysed, the example that stable grid voltage is given. Finally, the latest development of the state monitoring technology of the synchronous condenser is summarized from both the existing fault diagnosis technology and parameter identification technology. In this paper, the basic theory, control strategy and operation state monitoring of the new synchronous condenser are summarized, which could provide reference for the further research.
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