多并联支路型可控电抗器短路电抗对支路电抗和电流的影响

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Abstract The impact of the short-circuit reactance on the branch reactance and current is the important reason which causes a difficulty to select the branch reactance and current ratings of a controllable reactor of multi-parallel branch type(CRMB), and the decline in equipment utilization. According to the each branch thyristor working characteristics of orderly turn-on and turn-off, the CRMB branch reactance and the current calculation formulae are derived by the recursive algorithm. After the function analysis on the calculation formulae and the calculation of an example, it is pointed out that the branch reactances decrease with transformer short-circuit reactance increasing, the branch currents increase with transformer short-circuit reactance increasing and the utilization rate minimum of a branch current rated value decreases with transformer short-circuit reactance increasing. In order to improve the utilization rate of CRMB equipments, the short-circuit reactance of the power transformer of CRMB should be less than a maximum value determined by the rated current utilization rate minimum, the branch capacity increment coefficient and the branch number. Therefore the design ratings of the transformer short-circuit reactance, branch reactance and current of a CRMB are selected. The results of the paper can be used as the theoretical foundation for the future design of CRMB and the research on a controllable reactor of transformer type.

Key words： Controllable reactor of multi-parallel branch type short-circuit reactance branch reactance branch current

Received: 18 September 2013 Published: 05 August 2014

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TM554

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	Tian Mingxing
	Yang Xiuchuan
	Yuan Dongsheng

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Tian Mingxing,Yang Xiuchuan,Yuan Dongsheng. Short-Circuit Reactances of a Controllable Reactor of Multi-Parallel Branch Type’s Influence on Its Branch Reactances and Currents[J]. Transactions of China Electrotechnical Society, 2014, 29(7): 237-243.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I7/237

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