Electric Power ›› 2018, Vol. 51 ›› Issue (1): 51-58.DOI: 10.11930/j.issn.1004-9649.201711236

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The Impact of Power Electronics Interfaces on Power System Frequency Control: A Review

LU Zongxiang1, TANG Haiyan2, QIAO Ying1, TIAN Xinshou2, CHI Yongning2   

  1. 1. State Key Lab of Control and Simulation of Power Systems and Generation Equipment (Department of Electrical Engineering, Tsinghua University), Beijing 100084, China;
    2. China Electric Power Research Institute, Beijing 100192, China
  • Received:2017-11-27 Online:2018-01-05 Published:2018-02-28
  • Supported by:
    This work is supported by National Natural Science Fund (No. 51407168); Science and Technology Project of State Grid Corporation of China (Study on Dynamics of Power Electronic-Dominated Power System).

Abstract: Devices such as wind turbines, solar power, and flexible high voltage direct current (HVDC) transmission are connected into power system via voltage or current source converters, which bring changes to system frequency dynamics, power balance principle and control methods. Recent frequency events are reviewed first. Then impacts on system frequency control of large-scale power electronic interface are analyzed in aspect of system inertia. Interface control technology that is engaged in improving frequency support capability are summarized, and degree of equivalence of external characteristics between electronic interface and synchronous generators are analyzed based on inertia response and primary frequency control. Power frequency balance based on law of conservation and conversion of energy in power system with large-scale electronic interfaces are discussed. Finally, some questions worthy of exploration in terms of principles, models and methods are proposed.

Key words: power electronic interface, power frequency control, inertia, virtual synchronous, power electronics dominated power systems

CLC Number: