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基于虚拟同步机运行模式的平滑算法研究
Research on Smoothing Algorithm Based on Virtual Synchronous Generator Mode
投稿时间:2018-07-29  修订日期:2018-10-12
DOI:
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  smooth algorithm  energy storage system  physical constraints  capacity to provide reactive power
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
马铱林 浙江大学电气工程学院 626644957@qq.com 
杨欢 浙江大学电气工程学院 yanghuan@zju.edu.cn 
何绍民 浙江大学电气工程学院 shirmin001@zju.edu.cn 
摘要点击次数: 35
全文下载次数: 
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:
      In order to reduce the adverse impact of the rapid fluctuation of photovoltaic output and grid load power on the energy storage system, the smoothing algorithm was introduced into the virtual synchronous generator control technology. First, by establishing a small-signal model considering the smoothing algorithm, the effect of the smoothing algorithm on the power change rate of the energy storage system was verified and the relationship between the physical constraints of the energy storage system and the smoothing algorithm was deduced. In addition, based on the exploration of the output characteristics of the system with different reactive power indicated the influence of the smoothing algorithm on the system's ability to provide reactive power. The theoretical deduction and simulation verification shows that the smoothing algorithm can not only reduce the power change rate of the energy storage system, but also can stabilized the system fluctuation and shorten the dynamic response time of the system by designing a reasonable filter. However, the introduction of smoothing element will increase the capacity requirements and decrease the range of the reactive power output when the storage capacity is constant.
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