兰州理工大学学报

兰州理工大学学报 ›› 2022, Vol. 48 ›› Issue (1): 71-77.

• 自动化技术与计算机技术 • 上一篇    下一篇

具有有功功率自备用能力的光伏系统虚拟同步控制研究

马明1,2, 包广清*3, 吕清泉1,2, 刘梦昕3, 谭宏涛4, 汪宁渤1,2   

  1. 1.国网甘肃省电力公司, 甘肃 兰州 730000;
    2.甘肃省风光资源野外观测研究站, 甘肃 兰州 730070;
    3.兰州理工大学 电气工程与信息工程学院, 甘肃 兰州 730050;
    4.重庆大学 输配电装备及系统安全与新技术国家重点实验室, 重庆 400044
  • 收稿日期:2020-08-24 出版日期:2022-02-28 发布日期:2022-03-09
  • 通讯作者: 包广清(1972-),女,甘肃兰州人,博士,教授,博导.Email:baogq03@163.com

Study on PV system virtual synchronization control with active power self-reserve ability

MA Ming1,2, BAO Guang-qing3, LÜ Qing-quan1,2, LIU Meng-xin3, TAN Hong-tao4, WANG Ning-bo1,2   

  1. 1. Gansu Electric Power Company of State Grid, Lanzhou 730070, China;
    2. Observation and Research Station for Wind Resources-Light Resources of Gansu Province, Lanzhou 730070, China;
    3. College of Electrical and Information Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
    4. State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing 400044, China
  • Received:2020-08-24 Online:2022-02-28 Published:2022-03-09

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摘要： 虚拟同步机技术以模拟传统同步发电机组机电暂态特性的控制方式,使光伏并网逆变器具有同步机组的惯量、阻尼、频率和电压调整等运行外特性.然而传统光伏虚拟同步技术需要依靠外加储能系统,才能实现虚拟同步动态响应,这将大幅增加光伏并网系统的建设成本.针对此问题,提出一种降功率虚拟同步控制策略,利用光伏出力的非线性特点,通过适当降低光伏电源的有功输出,使光伏系统自身具备有功功率的上调能力,从而在不外加储能单元的情况下能够自主参与电网频率响应.仿真分析结果验证了所提控制策略的有效性和正确性,可以为今后光伏并网消纳提供理论依据.

关键词: 光伏系统, 一次调频, 有功备用, 虚拟同步控制

Abstract: The virtual synchronous machine technology simulates the electromechanical transient characteristics of the traditional synchronous generator set, which makes the photovoltaic grid connected inverter have the inertia, damping, frequency and voltage adjustment of the synchronous unit. However, over-reliance on energy storage systems will inevitably affect traditional PV virtual synchronization technology applications in actual engineering, which will greatly increase the construction cost of PV system. In this paper, a reduced power virtual synchronous control strategy is proposed. By properly reducing the active power output of photovoltaic power supply making use of non-linear property of PV system output, the PV system can actively participate in the frequency response of power grid without additional energy storage unit. The simulation results verify the effectiveness and correctness of the proposed control strategy, which can provide a theoretical basis for large-scale PV connection and consumption.

Key words: PV system, primary frequency modulation, active power reserve, virtual synchronization generator

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