Inertia Identification and Analysis for High-Power-Electronic-Penetrated Power System Based on Measurement Data

Zhentao Xu, Junjie Ma (), Yousong Gao, Yong Li, Haifeng Yu and Lu Wang
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Zhentao Xu: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Junjie Ma: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Yousong Gao: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Yong Li: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Haifeng Yu: Economic & Technical Research Institute, State Grid Hunan Electric Power Company Limited, Changsha 410004, China
Lu Wang: Economic & Technical Research Institute, State Grid Hunan Electric Power Company Limited, Changsha 410004, China

Energies, 2023, vol. 16, issue 10, 1-19

Abstract: With the gradual increases in the use of wind power and photovoltaic generation, the penetration rate of power electronics has increased in recent years. The inertia characteristics of power-electronic-based power sources are different from those of synchronous generators, making the evaluation of inertia difficult. In this paper, the inertia characteristics of power-electronic-based power sources are analyzed. A measurement-based inertia identification method for power-electronic-based power sources, as well as for high-power-electronic-penetrated power systems, is proposed by fitting the frequency and power data. The inertia characteristics of different control strategies and corresponding control parameters are discussed in a case study. It was proven that the inertia provided by power-electronic-based power sources can be much higher than that provided by a synchronous generator of the same capacity. It was also proven that the inertia provided by power-electronic-based power sources is not a constant value, but changes along with the output power of the sources.

Keywords: power-electronic-based power source; virtual inertia; inertia identification (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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