Electric Power ›› 2021, Vol. 54 ›› Issue (5): 83-90,110.DOI: 10.11930/j.issn.1004-9649.201903030

Previous Articles     Next Articles

Coordinative Frequency Control of Multi HVDC Links in Sending-End Power Grid Considering Over-Frequency Protection of Wind Power Generation

YOU Guangzeng1, LI Huarui2, LI Changgang2, LIU Chao3, QIAN Yingchun1, LI Lingfang1   

  1. 1. Yunnan Power Grid Company Limited, Kunming 650011, China;
    2. School of Electrical Engineering, Shandong University, Jinan 250061, China;
    3. China Electric Power Research Institute, Beijing 100192, China
  • Received:2019-03-19 Revised:2020-01-17 Published:2021-05-05
  • Supported by:
    This work is supported by National Natural Science Foundation of China (No.51407107) and Young Scholars Program of Shandong University (No.2018WLJH31)

Abstract: A large number of high voltage direct current (HVDC) projects are under construction or have been put into operation in order to mitigate the reverse distribution between energy and loads in China. Focusing on the over-frequency scenarios of sending-end power systems causing by HVDC blocking, the coordinative control of multi high voltage direct current (HVDC) links considering over-frequency protection of wind power generators is studied in this paper to control system frequency. A coordinative control model is proposed to minimize the total HVDC modulation amount. The first-order difference is adopted to estimate the sensitivity of the maximum frequency deviation of the system against each controlled DC power, and the optimum coordinative frequency control strategies of multi HVDC links can be obtained. The proposed method is validated in a sending-end power grid model with high wind power penetration rate to show its effectiveness in designing the frequency control strategies of the sending-end power systems.

Key words: wind power generation, sending-end power grid, frequency control, HVDC