Reactive Power Configuration Scheme of ±800 kV Jiuquan-Hunan UHVDC Project

doi:10.3969/j.issn.1000-7229.2015.09.007

Abstract

Abstract:

±800 kV Jiuquan-Hunan UHVDC project sends large scale wind power to Hunan power system which is depending on the outside power source. Thus its reactive power compensation configurations not only need to consider the reactive power requirements of the DC system, but also should be optimized through equipped with reasonable dynamic reactive power compensation devices, according to weak reactive voltage supporting ability of AC grid in transmitter/receiver system. Because the AC grid connected to Jiuquan had large-scale wind power, the reactive power configuration scheme was proposed, in which static var compensator (SVC) was applied in the low-voltage side of substation-used transformer in converter station, and the filter capacity of converter station with SVC was determined. Aiming at low voltage risk of AC system connected to Hunan converter station, static synchronous compensator (STATCOM) was applied in the low-voltage side of substation-used transformer in Hunan converter station, the corresponding filter capacity was optimized and configured. Based on the calculation and analysis, it can be concluded that the dynamic reactive power compensation device applied in converter station can improve the voltage stability of the connecting AC system nearby converter station, reduce the voltage fluctuation of the converter bus caused by filter switching, and decrease the device investment.

Key words: maximum reactive power consumption, dynamic reactive power compensation device, low voltage reactive power compensation, reactive power balance, reactive power configuration scheme

CLC Number:

TM 73

ZOU Xin，JIANG Weiyong，LI Yanan. Reactive Power Configuration Scheme of ±800 kV Jiuquan-Hunan UHVDC Project[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(9): 43-49.

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