Quantitative Analysis of System Strength of Renewable Energy Generation Grid-connected System Based on Transient Overvoltage Constraint

被引：0
|
作者：
Sun H. [1 ]
Yu L. [1 ]
Zhao B. [1 ]
机构：
[1] State Key Laboratory of Power Grid Safety and Energy Conservation (China Electric Power Research Institute), Haidian District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 11期
关键词：
grid-connected scale; power system with renewable energy; short- circuit capacity; tansient overvoltage; voltage support strength;
D O I：
10.13334/j.0258-8013.pcsee.220468
中图分类号：
学科分类号：
摘要：
The strength of system with renewable energy generation (REG) has an important impact on the severity of transient overvoltage. A quantification method is proposed by using the short-circuit ratio (SCR) as the system strength index and considering the interaction in multi-infeed systems. First, the relationship is analyzed among the voltage, reactive power, and short-circuit capacity at the transient overvoltage moment. Furthermore, the interaction in multi-infeed systems is analyzed by using voltage phase method, and the mathematical model for multi-infeed system is established. The correlation between the system strength and the transient overvoltage is analyzed by combining SCR and this model. Meanwhile, a quantitative method of REG maximum scale is proposed by taking 1.3pu as the constraint due to the transient overvoltage, and the calculation method of minimum short-circuit capacity is proposed to improve system strength. Finally, the correlation between system strength and transient overvoltage is verified by examples. ©2023 Chin.Soc.for Elec.Eng.
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页码：4207 / 4217
页数：10
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