HVDC Converter Station Reactive Power Coordinated Control Strategy With Synchronous Condenser

被引：0
作者：
Liu Z. [1 ]
Li X. [2 ]
Liu J. [2 ]
机构：
[1] State Grid Corporation of China, Xicheng District, Beijing
[2] State Grid Economic and Technological Research Institute Co., Ltd., Changping District, Beijing
来源：
Dianwang Jishu/Power System Technology | 2020年 / 44卷 / 10期
关键词：
HVDC; Reactive power control; Steady-state overvoltage; Synchronous condenser; Transient overvoltage;
D O I：
10.13335/j.1000-3673.pst.2020.0818
中图分类号：
学科分类号：
摘要：
Overvoltage of steady or transient states by the faults is a serious issue that affects the safe and stable operation of the HVDC transmission network. In this paper, the characteristics of the transient overvoltage and the steady-state voltage after the accidents in the converter station are studied. Based on the analysis of the operating characteristics of static reactive power compensation equipment and the performance characteristics of the synchronous condenser, the reactive power coordination control strategy is formulated with the aim of suppressing the transient overvoltage at the sending end power grid, reducing the steady-state voltage over-limit level after the accidents, and lowering the number of times of the converter transformer tap switch. The strategy is: The synchronous condenser is operated in constant reactive power control, which is running in phase-in mode when the power of HVDC is low and in phase-lag mode when the power is high, replacing some of the AC filter inputs. The AC filter is operated in constant voltage control, in which, the AC filter provides parts of reactive power to compensate the AC line with high-power. The electromechanical simulation results of an actual HVDC system show that the coordinated control strategy can effectively suppress the transient overvoltage during the faults and improve the steady-state voltage level after the accidents, reducing the number of actions of the converter tap when the DC power changes. © 2020, Power System Technology Press. All right reserved.
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页码：3857 / 3865
页数：8
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