Electric Power ›› 2022, Vol. 55 ›› Issue (7): 152-162.DOI: 10.11930/j.issn.1004-9649.202110085

• New Energy • Previous Articles     Next Articles

Quantitative Assessment Method for Transient Voltage of Distribution Network with High-Penetration Wind Power

XU Yanchun1, JIANG Weijun1, SUN Sihan1, MI Lu2   

  1. 1. Hubei Provincial Key Laboratory for Operation and Control of Cascaded Hydropower Station (China Three Gorges University), Yichang 443002, China;
    2. Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas 77840, USA
  • Received:2021-10-24 Revised:2022-04-27 Online:2022-07-28 Published:2022-07-20
  • Supported by:
    This work is supported by National Natural Science Foundation of China (No.51707102).

Abstract: With the further penetration of distributed wind power in the distribution network, assessing the factors affecting the transient voltage stability of the power grid becomes increasingly significant. However, the existing indexes for evaluating transient voltage stability are not applicable to scenarios with multiple transient characteristics. In this paper, the assessment idea of a multiple-two-element notation criterion is outlined. For voltage sag, a safety margin index of voltage sag of the bus is proposed. Next, a safety margin index of the overvoltage of the bus is further constructed. A step factor is introduced to combine the two indexes effectively into a safety margin index of the transient voltage of the bus based on an improved multiple-two-element notation. Then, a safety margin index of regional transient voltage is proposed to measure the transient voltage stability of a certain region. Finally, Matlab/Simulink is used to simulate the distribution network with high-penetration wind power according to the proposed indexes. The effectiveness and universality of the proposed indexes are verified while the factors affecting the transient voltage stability of the distribution network are quantified.

Key words: high-penetration wind power, distribution network, transient voltage stability, improved multiple-two-element notation, safety margin index of transient voltage, quantitative assessment