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马铱林,杨欢,何绍民.基于虚拟同步机运行模式的平滑算法[J].电源学报,2018,16(6):1-10
基于虚拟同步机运行模式的平滑算法
Smoothing Algorithm Based on Operating Mode of Virtual Synchronous Generator
投稿时间:2018-07-29  修订日期:2018-10-12
DOI:10.13234/j.issn.2095-2805.2018.6.1
中文关键词:  虚拟同步机  平滑算法  储能系统  物理约束  提供无功功率能力
英文关键词:virtual synchronous generator  smoothing algorithm  energy storage system(ESS)  physical constraint  cap-acity to provide reactive power
基金项目:国家自然科学基金资助项目(51677167)
作者单位E-mail
马铱林 浙江大学电气工程学院, 杭州 310027  
杨欢 浙江大学电气工程学院, 杭州 310027 yanghuan@zju.edu.cn 
何绍民 浙江大学电气工程学院, 杭州 310027  
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中文摘要:
      为降低光伏出力与电网负荷快速波动对储能系统产生的不利影响,提出将平滑算法引入虚拟同步机控制技术中。首先通过建立考虑平滑环节的小信号模型,验证平滑算法对储能系统功率变化率的影响,并推导出储能系统物理约束与平滑算法的关系式;进一步探究系统提供不同无功功率时的输出特性,分析得到平滑算法对系统提供无功功率能力的影响。理论推导与仿真验证表明:平滑算法的加入不仅可以降低储能系统的功率变化率,经过合理设计滤波器还可以平抑系统波动,缩短系统的动态响应时间;然而平滑单元的引入也会提高对储能系统的容量需求,当储能容量一定时,也会引起可输出无功功率范围的缩小。
英文摘要:
      To reduce the adverse impact of the rapid fluctuation of photovoltaic output and grid load on an energy st-orage system(ESS), smoothing algorithm was introduced to the control technology of virtual synchronous generator. First, by establishing a small-signal model which takes the smoothing link into account, the effect of the smoothing algorithm on the power change rate of ESS was verified, and the relationship between the ESS's physical constraints and the smoothing algorithm was deduced. In addition, based on the exploration of the system's output characteristics with different reactive powers, the influence of the smoothing algorithm on the system's capacity to provide reactive power was analyzed. The theoretical deduction and simulation verification show that the introduction of the smoothing algorithm can not only reduce the power change rate of ESS, but also stabilize the system fluctuation and shorten the dynamic response time of the system by designing a proper filter. However, the introduction of smoothing element will also increase the capacity requirements of ESS and decrease the range of reactive power output when the storage capacity is constant.
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