基于APS-IPSO的构网型储能跟网-构网双模式切换策略

陈逍阳; 李晨阳; 徐恒山; 马鑫; 米玛; 索朗平措

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电力建设 ›› 0

基于APS-IPSO的构网型储能跟网-构网双模式切换策略

陈逍阳¹, 李晨阳¹, 徐恒山¹, 马鑫², 米玛³, 索朗平措³

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Grid-forming and Grid-Following Dual-Mode Switching Strategy Based on APS-IPSO for Grid-Forming Energy Storage

CHEN Xiaoyang¹, LI Chenyang¹, XU Hengshan¹, MA Xin², MI Ma³, SUO Langpingcuo³

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摘要

【目的】针对构网型储能因变流器单一运行模式难以适应电网短路比变化及复杂故障扰动的问题,提出了一种基于幅相同步（amplitude and phase synchronization, APS）的双模式改进切换策略,并使用改进粒子群优化（improved particle swarm optimization, IPSO）算法对其关键参数进行辨识。【方法】首先,分析了常规跟网-构网模式切换策略存在的不足,揭示了功率环电压相位累计误差及其造成的无功电压偏差使得模式切换时暂态冲击增大的机理;基于此,提出了幅相同步补偿机制,在模式切换过程中同步修正电压幅值和相位信号,实现了内环电流参考信号的平滑变化;然后,针对常规切换策略中跟踪环参数难以整定的缺点,采用基于非线性惯性权重和学习因子的IPSO算法对4组跟踪环参数进行自适应辨识以提升储能变流器对跟网和构网模式运行点的跟踪性能和扰动抑制效果。【结果】在Matlab/Simulink里搭建MW级构网型储能电磁暂态模型开展验证,结果表明：所提控制策略可以顺利实现暂态功率冲击小于0.02 p.u.,且在连续切换和运行点波动场景下均能稳定运行。【结论】相比于常规切换策略,基于APS-IPSO的改进策略可实现储能变流器在跟网-构网模式切换中冲击小、稳定性好,为后续新能源场站内部署具备模式切换的储能或新能源机组提供了理论基础。

Abstract

【Objectives】 In order to solve the problem that grid-based energy storage is difficult to adapt to the change of grid short-circuit ratio and complex fault disturbance due to the single operation mode of the converter, this paper proposes a dual-mode improved switching strategy based on amplitude and phase synchronization (APS), and uses the improved particle swarm optimization (IPSO) to identify its key parameters. 【Methods】 Firstly, this paper analyzes the shortcomings of the conventional Grid-forming and Grid-following Dual-Mode Switching Strategy, and reveals the mechanism of the voltage phase accumulation error of the power loop and the resulting reactive voltage deviation that increases the transient impact during mode switching. Based on this, an amplitude and phase synchronous compensation mechanism is proposed, which simultaneously corrects the voltage amplitude and phase signal during the mode switching process and realizes the smooth change of the inner loop current reference signal. Then, in view of the shortcomings of the tracking loop parameters in the conventional switching strategy, an IPSO algorithm based on nonlinear inertia weights and learning factors is used to adaptively identify the parameters of the four groups of tracking loops, so as to improve the tracking performance and disturbance suppression effect of the energy storage converter on the operation points of the Grid-following and Grid-forming Modes. 【Results】 Finally, a MW-level grid- forming energy storage electromagnetic transient model was built in Matlab/Simulink for verification, and the results showed that the proposed control strategy could successfully achieve a transient power impact of less than 0.02 p.u., and could operate stably in the scenarios of continuous switching and operation point fluctuation. 【Conclusions】 Compared with the conventional switching strategy, the improved strategy based on APS-IPSO can realize the small switching impact and good stability of the energy storage converter in the Grid-following-Grid-forming Modes, and provides a theoretical basis for the subsequent deployment of energy storage or new energy units with mode switching in new energy stations.

导出引用

陈逍阳, 李晨阳, 徐恒山, 马鑫, 米玛, 索朗平措. 基于APS-IPSO的构网型储能跟网-构网双模式切换策略[J]. 电力建设. 0

CHEN Xiaoyang, LI Chenyang, XU Hengshan, MA Xin, MI Ma, SUO Langpingcuo. Grid-forming and Grid-Following Dual-Mode Switching Strategy Based on APS-IPSO for Grid-Forming Energy Storage[J]. Electric Power Construction. 0

中图分类号： TM732

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