Improved Frequency Response Model for Power System with Photovoltaic Generation

2022 IEEE 5th International Electrical and Energy Conference (CIEEC) Pub Date : 2022-05-27 DOI:10.1109/cieec54735.2022.9846523

Zhiyang Hu, Wu Cao, Jun Sha, Minhui Qian

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引用次数: 1

Abstract

With the gradual increase of renewable generation integration, power system with high-penetration photovoltaic(PV) integrated is one of the typical operating scenarios. Large-scale PV entry affects the dynamic frequency characteristics of the power system greatly. Based on the analysis of the insufficiency of the traditional power system frequency response (SFR) model, an improved SFR model of the power system with PV generation is established, considering the effect of PV frequency regulation, equivalent governor delay and frequency regulation deadband. Secondly, the parameter calculation method for the improved SFR model is proposed, in which some parameters are achieved by the weighted average of the information of each unit, and the remaining parameters are identified. Finally, the effect of the improved model and parameter calculation method are verified by simulation cases. Simulation results show that the improved SFR model can reflect the frequency response characteristics of the power system, and its accuracy is better than the traditional SFR model.

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改进的光伏发电电力系统频率响应模型

随着可再生能源发电并网规模的逐步加大，高渗透光伏并网的电力系统是典型的运行场景之一。大规模光伏入网对电力系统的动态频率特性影响很大。在分析传统电力系统频率响应(SFR)模型不足的基础上，考虑光伏频率调节、等效调速器延迟和频率调节死带的影响，建立了一种改进的光伏发电电力系统频率响应模型。其次，提出了改进SFR模型的参数计算方法，通过对各单元信息进行加权平均得到部分参数，对剩余参数进行识别;最后，通过仿真实例验证了改进模型和参数计算方法的效果。仿真结果表明，改进的SFR模型能较好地反映电力系统的频响特性，其精度优于传统的SFR模型。

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2022 IEEE 5th International Electrical and Energy Conference (CIEEC)

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