Voltage Stability Control Strategy for Interconnected Systems Through VSC-HVDC

被引：0
|
作者：
Zeng Q. [1 ]
Li X. [1 ]
Zhang L. [2 ]
Deng Q. [1 ]
机构：
[1] School of Electrical Eng. and Info., Sichuan Univ., Chengdu
[2] State Grid Jiujiang Power Supply Co., Jiujiang
来源：
Gongcheng Kexue Yu Jishu/Advanced Engineering Sciences | 2017年 / 49卷 / 04期
关键词：
DC voltage margin control; Droop control; Dynamic limiter controller; Reactive current; Voltage source converter (VSC); Voltage stability;
D O I：
10.15961/j.jsuese.201601321
中图分类号：
学科分类号：
摘要：
Due to the independent control of active and reactive power, voltage source converter (VSC) base on HVDC system can not only distribute power in DC system, but also improve the stability of AC system connected by VSC-HVDC. In order to fully excavate the reactive power potential of VSC, and to improve the voltage stability of AC system, a voltage stability control strategy based on VSC-HVDC interconnected system was proposed. In VSC-HVDC system, rectifier station was controlled by DC voltage margin and droop, and the inverter station was controlled by constant DC voltage. The limit value of active current was calculated based on reactive current. Then, the dynamic limiter controllers of the active current were respectively designed for rectifier and inverter stations to expand the limit value of reactive current. Without interstation communications, apart of active capacity of VSC-HVDC system was converted to reactive capacity, which increased the reactive output of the VSC stations and reduced the reactive adjustment burden of AC system in the case of disturbance or fault. Finally, simulations with PSCAD/EMTDC verified that the control strategy proposed in the paper took full use of the power adjustment ability and enhanced the voltage stability of AC system connected by VSC-HVDC. The strategy provides a new solution for voltage stability of AC system connected by VSC-HVDC. © 2017, Editorial Department of Advanced Engineering Sciences. All right reserved.
引用
下载
收藏
页码：174 / 180
页数：6
相关论文
共 15 条
  • [1] Tang G., He Z., Pang H., Research, application and development of VSC-HVDC engineering technology, Automation of Electric Power Systems, 37, 15, pp. 8-9, (2013)
  • [2] Zou C., Wang B., Li T., control strategy of VSC-HVDC system supplying power for passive networks, Power System Technology, 33, 2, pp. 84-85, (2009)
  • [3] Zhu R., Li X., Wu F., A novel droop control strategy taking into account the available headroom VSCMTDC system, Journal of Sichuan University (Engneering Science Edition), 47, 3, pp. 137-143, (2015)
  • [4] Sun S., Tian J., Enhancement of fault ride-through capability for grid-connected wind farm, Electric Power Automation Equipment, 33, 8, pp. 137-140, (2013)
  • [5] Liao Y., Wang G., Fault ride-through control for DFIG-based wind farm with VSC-HVDC grid-integration, Automation of Electric Power System, 38, 23, pp. 13-20, (2014)
  • [6] Jia S., Li S., Bao Z., Undervoltage load shedding strategy of hybrid AC/DC, Proceedings of the CSU-EPSA, 25, 5, pp. 45-48, (2013)
  • [7] Li Q., Song Q., Liu W., Et al., A coordinated control strategy for fault ride-through of wind farm integration based on VSC-HVDC, Power System Technology, 38, 7, pp. 1739-1745, (2014)
  • [8] Zhang X., Hu M., Wu Z., Et al., Coordinated LVRT control of wind power generation system based on VSC-HVDC, Electric Power Automation Equipment, 34, 3, pp. 138-142, (2014)
  • [9] Liu Y., Chen Z., A flexible power control method of VSC-HVDC link for the enhancement of effective short-circuit ratio in a hybrid multi-infeed HVDC system, IEEE Transactions on Power Systems, 28, 2, pp. 1568-1581, (2014)
  • [10] Zhu R., Wang Y., Li X., Et al., An additional frequency control strategy for interconnected systems through VSC-HVDC, Automation of Electric Power System, 38, 16, pp. 81-86, (2014)
12