| 引用本文: | 杜永安,杜丽艳,徐 岩.光伏发电接入柔直互联区域调频策略[J].电力系统保护与控制,2021,49(6):1-9.[点击复制] |
| DU Yongan,DU Liyan,XU Yan.Frequency regulation for PV generation connected to an interconnection area by VSC-HVDC[J].Power System Protection and Control,2021,49(6):1-9[点击复制] |
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| 摘要: |
| 针对大规模光伏发电接入柔直互联区域带来受端电网调频能力不足的问题，采用人工耦合受端电网频率的同时，设计光伏发电虚拟惯量控制策略，实现了光伏发电主动参与受端电网的频率调节。其次，建立了含光伏发电、柔性直流输电的电力系统频率响应模型，分析不同控制参数对受端电网频率动态特性的影响及其变化规律。再次，分析不同控制参数对系统小干扰稳定性的影响。在EMTDC/PSCAD中建立了系统仿真模型，验证了控制策略的可行性以及对频率动态特性的改善作用。 |
| 关键词: 光伏发电 频率调节 虚拟惯量控制 柔性直流输电 |
| DOI：DOI: 10.19783/j.cnki.pspc.200700 |
| 投稿时间：2020-06-19修订日期：2020-08-19 |
| 基金项目:国家自然科学基金项目资助(51307059) |
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| Frequency regulation for PV generation connected to an interconnection area by VSC-HVDC |
| DU Yongan1,DU Liyan2,XU Yan3 |
| (1. Power China Jilin Electric Power Engineering Co., Ltd., Changchun 130022, China;
2. State Grid Jibei Electric Power Company Limited, Beijing 100053, China;
3. Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China) |
| Abstract: |
| Large-scale PV generation connected to the interconnection area by a Voltage Source Converter Based High Voltage Direct Current (VSC-HVDC) leads to an insufficient frequency regulation capability of the system. To tackle this, a virtual inertia control strategy of PV generation, one which adopts artificial coupling receiving end power network frequency, is put forward. This can accomplish the participation of PV generation in the frequency regulation of the receiving end power network actively. Then a frequency response model of the power system, including PV generation and VSC-HVDC, is established. This paper analyzes the influence of different control parameters on the dynamic frequency characteristics of the receiving end power network and its variation rule. The small signal stability of the system with different control parameters is also analyzed. A simulation model is established in EMTDC/PSCAD to verify the feasibility of the control strategy and that there is improvement of frequency dynamic characteristics.
This work is supported by the National Natural Science Foundation of China (No. 51307059). |
| Key words: PV generation frequency regulation virtual inertial control strategy VSC-HVDC |
