摘要
常规的储能逆变器控制策略在负荷大幅度变化时电压与功率的跟踪能力不佳,且滤波器参数发生变化时电压质量下降严重。对此提出了一种储能系统中基于虚拟同步发电机(Virtual Synchronous Generator,VSG)的H_(∞)鲁棒控制方法,使得当储能系统运行于不同的工况下时,仍然能够满足参与电网调峰调压调频一体化的要求。分析了VSG控制的原理,建立了储能逆变器在供电台区中的系统模型,基于电网运行中存在的大扰动与建模误差等问题,通过系统结构机理建模与系统运行数据辨识建模的比较,将外界干扰和建模误差作为不确定性加权函数建立鲁棒控制器,对参考电压进行控制,使输出电压可以跟踪期望输入电压,增加系统抗干扰性能,实现储能系统对电网的高可靠供电。最后在Simulink中进行了仿真模型搭建,验证了所提控制策略的正确性与有效性。
The conventional energy storage inverter control strategy has poor voltage and power tracking ability when the load changes drastically,and the voltage quality drops severely when the filter parameters change.A H_(∞) robust control method based on virtual synchronous generator(VSG)in energy storage system was proposed,which enables the energy storage system to still meet the requirements of the integration of power grid peak regulation,voltage regulation and frequency regulation when the energy storage system is operating under different working conditions.Firstly,the principle of VSG control was analyzed,and the system model of the energy storage inverter in the power supply station area was established.Then,considering the problems of large disturbance and modeling error in the operation of power grid,through the comparison of system structure mechanism modeling and system operation data identification modeling,the external disturbance and modeling error were taken as uncertainty weighting function,and a robust controller was established to control the reference voltage,so that the output voltage could track the expected input voltage,increase the anti⁃interference performance of the system,and realize the high and reliable power supply of energy storage system to power grid.Finally,a simulation model was built in Simulink to verify the correctness and effectiveness of the proposed control strategy.
作者
于芃
孙树敏
程艳
王士柏
王玥娇
YU Peng;SUN Shumin;CHENG Yan;WANG Shibai;WANG Yuejiao(State Grid Shandong Electric Power Research Institute,Jinan 250003,China)
出处
《山东电力技术》
2022年第10期23-30,共8页
Shandong Electric Power
基金
国网山东省电力公司科技项目“储能参与山东电网多场景协同优化调控与仿真评价技术研究”(2020A-128)。
