| 具有同步发电机特性的储能型光伏并网发电系统研究 |
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| 引用本文： | 徐华电,苏建徽,施永,王一丁,杜燕. 具有同步发电机特性的储能型光伏并网发电系统研究[J]. 控制理论与应用, 2018, 35(7): 1021-1028 |
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| 作者姓名： | 徐华电 苏建徽 施永 王一丁 杜燕 |
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| 作者单位： | 合肥工业大学教育部光伏系统工程研究中心 |
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| 基金项目： | 国家重点研发计划项目(2017YFB0903503),台达环境与教育基金会《电力电子科教发展计划》重大项目(DREM2015002),中央高校基本科研业务费专项资金资助 (JZ2016HGBZ1023) |
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| 摘 要： | 基于虚拟同步发电机(virtual synchronous generator,VSG)控制的并网逆变器可以对电网的频率和电压起到一定的支撑作用.但是,仅由光伏供电的逆变器难以模拟同步发电机的特性.本文提出一种具有同步发电机特性的储能型光伏并网发电系统,并给出了相应的VSG控制策略、DC–DC控制策略以及协调控制方法;建立了系统的小信号模型,分析了参数取值对动态性能和稳定性的影响.仿真结果不但表明该系统具有同步发电机特性,可实现光伏阵列的最大功率跟踪(maximum power point tracking,MPPT)和储能的充放电控制;而且验证了理论分析的正确性.
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| 关 键 词： | 光伏 储能 虚拟同步发电机 协调控制 |
| 收稿时间： | 2017-07-25 |
| 修稿时间： | 2017-12-11 |
Research on grid-connected photovoltaics -energy storage system with synchronous generator characteristics |
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| XU Hua-dian,SU Jian-hui,SHI Yong,WANG Yi-ding and DU Yan. Research on grid-connected photovoltaics -energy storage system with synchronous generator characteristics[J]. Control Theory & Applications, 2018, 35(7): 1021-1028 |
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| Authors: | XU Hua-dian SU Jian-hui SHI Yong WANG Yi-ding DU Yan |
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| Affiliation: | Research Center for Photovoltaic System Engineering of Ministry of Education,Hefei University of Technology,Research Center for Photovoltaic System Engineering of Ministry of Education,Hefei University of Technology,Research Center for Photovoltaic System Engineering of Ministry of Education,Hefei University of Technology,Research Center for Photovoltaic System Engineering of Ministry of Education,Hefei University of Technology,Research Center for Photovoltaic System Engineering of Ministry of Education,Hefei University of Technology |
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| Abstract: | The Grid-connected inverter based on virtual synchronous generator (VSG) has capacity to support the frequency and voltage of electric power system. However, it is difficult to simulate the characteristics of synchronous generators for inverters only powered PV. This paper proposed a grid-connected PV-energy storage system which mimics the characteristics of synchronous generator, and presented control tactics, including VSG control strategy, energy storage control strategy and coordinated control strategy. A small signal model was established in order to analyze effects of the parameters on dynamic performance and stability. The simulation results not only indicated that the system has the characteristics of synchronous generator, track maximum power point of the PV cells and control charge and discharge of the energy storage flexibly; but also verify the correctness of the theoretical analysis. |
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| Keywords: | photovoltaics energy storage virtual synchronous generator coordinated control |
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