考虑风荷协同参与调频的电力系统低频减载策略仿真研究

Simulation Research of Low Frequency Load Shedding in Power System Considering Wind Power and Flexible Adjustable Load Participating in Frequency Modulation

随着新能源机组的大规模并网,传统的低频减载策略由于未充分考虑风电参与调频的优势,且采用负荷被动切除的策略,很难满足电力系统运行的安全性与经济性要求。为了探究风电机组与柔性可调负荷共同参与调频对电力系统低频减载策略的影响,分析了风电机组及柔性负荷参与电网频率响应的模型,阐述了电力系统低频减载实施方案的配置原则,在仿真软件中搭建风荷共同参与调频模型并依照区域大电网实际运行情况进行低频减载仿真计算。计算结果表明,考虑虚拟惯性控制的风电机组与柔性可调负荷共同调频下的低频减载切除负荷量相比于传统低频减载策略明显减少,风荷协同参与调频对增强电力系统频率稳定防线及优化减载量等方面都具有重要的研究意义。

With the large-scale grid connection of new energy units,the traditional low-frequency load shedding strategy is difficult to meet the requirement of safety and economy of power system operation because it does not fully consider the advantages of wind power participating in frequency modulation and adopts the passive load cutting strategy.In order to explore the influence of wind turbine and flexible adjustable load co-participating in frequency modulation on low-frequency load shedding strategy of power system,it analyzes the model of wind turbine and flexible load participating in power network frequency response,and expounds the configuration principle of low-frequency load shedding implementation scheme of power system.The wind load co-participating frequency modulation model is built in the simulation software and the low-frequency load reduction simulation calculation is carried out according to the actual operation of the regional large power grid.The results show that the inertial control virtual wind turbines and flexible adjustable load under the frequency modulation of low frequency load shedding to remove load reduced significantly compared with the traditional low frequency load shedding strategy.The joint participation of wind power and flexible load in frequency modulation has important research significance in enhancing the defense line of frequency stability of power system and optimizing load reduction.