考虑 VSG 构网储能暂态与稳态优化的自适应策略  

Adaptive Strategy Considering Transient and Steady⁃state Optimization of VSG Grid⁃forming Energy Storage

作　　者：赵炳洋 赵波 胡娟 张芳[1] ZHAO Bingyang;ZHAO Bo;HU Juan;ZHANG Fang(School of Automation,Beijing Information Science and Technology University,Beijing 100192,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]北京信息科技大学自动化学院,北京100192 [2]中国电力科学研究院有限公司,北京100192

出　　处：《高压电器》2023年第7期39-47,共9页High Voltage Apparatus

基　　金：智能配电台区分布式光伏接入影响机理及柔性群控技术研究(S2226221)。

摘　　要：虚拟同步发电机(virtual synchronous generator,VSG)型构网储能因其良好的阻尼与惯量支撑特性已被广泛关注,但VSG型构网储能难以抑制有功暂态存在的超调、振荡的同时削减有功稳态偏差,灵活性差。首先建立VSG型构网储能系统有功环的闭环小信号模型,由系统的特征方程、波特图以及根轨迹分析有功指令与电网频率扰动下的系统暂态与稳态特性。接着指出固定参数VSG型构网储能无法兼顾暂态存在的超调、振荡与稳态有功偏差。因此提出一种自适应VSG型构网储能控制策略,所提控制策略确保自适应参数平滑变化,抑制系统超调、振荡的同时,可削减稳态偏差。最后通过MATLAB/Simulink验证了所提控制策略的有效性。The virtual synchronous generator(VSG)type of grid forming energy storage system has been widely con⁃cerned due to its excellent damping and inertia support characteristics.However,VSG type of grid forming energy storage system is difficult to suppress the overshoot and oscillation of active power while reducing the steady⁃state de⁃viation of active power,resulting in weak flexibility.Firstly,the closed loop small⁃signal modeling of the active power loop of VSG type of grid forming energy storage system is set up.The transient and steady state characteristics of the system under active power command and grid frequency disturbance are analyzed by the characteristic equation,Bode diagram and root locus of the system.Furthermore,it is pointed out that VSG type of grid energy storage system with fixed parameters cannot balance transient overshoot,oscillation,and steady⁃state active power deviation.There⁃fore,an adaptive VSG type of grid forming energy storage control strategy is proposed,which ensures smooth changes in adaptive parameters,suppresses system overshoot and oscillation,and reduces steady⁃state deviations at the same time.Finally,the effectiveness of the proposed control strategy is verified through MATLAB/Simulink.

关 键 词：构网储能 虚拟同步发电机 动态优化 稳态优化 自适应控制 

分 类 号：TM341[电气工程—电机]