摘要
针对光伏高渗透接入配电网可能带来的电压越限问题,提出一种基于变流器统一结构模型的配电网鲁棒自适应动态电压控制方法。区别于现有单一类别的分布式电源控制设计,所提方法可以适应多种控制类型和不同储能配置的分布式电源动态电压控制。首先,通过类比分布式电源的不同控制模型以及分析电压灵敏度关系,实现了不同类型分布式电源控制模型的结构统一,建立基于变流器统一结构模型的配电网整体系统模型;其次,考虑到电网动态运行中负荷变动、电源出力波动以及线路阻抗变化等多种因素带来的模型参数误差,设计了混合鲁棒控制方法,在保证系统快速动态电压反馈控制的同时,抑制此类不确定性对于电压动态控制的影响;此外,考虑到基于理论模型进行的鲁棒控制设计通常难以计及实际运行过程中电源的出力上下限以及功率因数等运行约束要求,因此进一步设计了分布式电源自适应调压控制率,通过与所提鲁棒控制的配合,实现了在控制过程中对功率因数约束和有功调压能力的良好兼顾。最后,IEEE33的仿真结果验证了所提方法的有效性。
A robust adaptive dynamic voltage control for photovoltaic(PV) high-penetration distribution network based on the unified structure model of convertors is proposed. Different from the existing methods of single-type distributed generators(DGs), this method can adapt the dynamic voltage control of multi-types DGs with different control strategies or energy storage configurations. Firstly, by comparing and simplifying different control strategies and analyzing the voltage sensitivity, the unified structure model of converters and the voltage control model of the distribution network were established. Then, a hybrid robust control method was designed to realize the fast convergence of the voltage control against the power changes of DGs, loads and parameters perturbation of line impedance. Besides, an adaptive voltage regulation method was designed based on the hybrid robust control method, thus the practical constraints, including output range and power factor, of DGs could be considered and well solved in the proposed method. Simulation results of IEEE 33 verify the effectiveness of the proposed method.
作者
张从越
窦晓波
张章
徐科
吴在军
ZHANG Congyue;DOU Xiaobo;ZHANG Zhang;XU Ke;WU Zaijun(School of Electrical Engineering,Southeast University,Nanjing 210096,Jiangsu Province,China;State Grid Tianjin Electric Power Company,Hebei District,Tianjin 300010,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2020年第22期7306-7316,共11页
Proceedings of the CSEE
基金
国网天津市电力公司科技项目(KJ20-1-08)
国家自然科学基金项目(51777031)。
关键词
分布式光伏
配电网
电压控制
自适应控制
混合鲁棒
distributed photovoltaic
distribution network
voltage control
adaptive control
hybrid robust
