Dynamic Inertia of Grid-connected Converter with Additional Frequency Control and Its Quantitative Evaluation
Control Theory and Application of Inertia-Power-Frequency in New Power System|更新时间:2025-06-16
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Dynamic Inertia of Grid-connected Converter with Additional Frequency Control and Its Quantitative Evaluation
Automation of Electric Power SystemsVol. 48, Issue 8, Pages: 131-140(2024)
作者机构:
1.四川大学电气工程学院,四川省成都市 610044
2.国网江苏省电力有限公司电力科学研究院,江苏省南京市 211103
作者简介:
基金信息:
State Grid Corporation of China (Research of oscillation mode drifting and coordinating suppression in power system with offshore wind power integrated via voltage source converter based high voltage direct current transmission,No. 4000-202318081A-1-1-ZN)(4000-202318081A-1-1-ZN)
CHEN Xiang,FU Qiang,BIN Zijun,et al.Dynamic Inertia of Grid-connected Converter with Additional Frequency Control and Its Quantitative Evaluation[J].Automation of Electric Power Systems,2024,48(8):131-140.
CHEN Xiang,FU Qiang,BIN Zijun,et al.Dynamic Inertia of Grid-connected Converter with Additional Frequency Control and Its Quantitative Evaluation[J].Automation of Electric Power Systems,2024,48(8):131-140. DOI: 10.7500/AEPS20230713004.
Dynamic Inertia of Grid-connected Converter with Additional Frequency Control and Its Quantitative Evaluation
The large-scale integration of renewable energy significantly reduces the inertia of the AC system
and the participation of grid-connected converters in the frequency control has become an important means to improve frequency stability. Based on the transfer function model
the dynamic inertia of grid-connected converter with additional frequency control is derived. It is observed that the dynamic inertia exhibits time-varying characteristics due to the combined influence of inertia design parameters and other control elements. However
simplifying it to a constant similar to the rotational inertia of synchronous generators will lead to analysis errors. Therefore
for the two mainstream grid-connected converter control methods of constant DC voltage control and constant power control
the quantitative evaluation method of dynamic inertia for grid-connected converter with additional frequency control is proposed. The influence mechanisms of different factors such as control parameters
operation conditions
and system characteristics on inertia are analyzed. It is concluded that the outer loop of active power control will significantly change the original design inertia
and it is necessary to focus on the inertia deviation caused by its control parameters. Finally
based on the time-domain simulation model built in Simulink
the correctness and effectiveness of the transfer function model and quantitative evaluation method of inertia are verified.
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