第2卷 第3期 2013 年 5 月 储 能 科 学 与 技 术 Energy Storage Science and Technology Vol.2 No.3 May 2013 研究及进展 超级电容器在光伏并网系统功率控制中的应用 姜 喆,尹忠东 (华北电力大学,新能源电力系统国家重点实验室,北京 102206) 摘 要:并网光伏发电系统输出功率的波动性和随机性给并网后系统稳定性、光伏发电消纳以及光伏电站电能 质量等方面带来了负面影响,制约了光伏发电的发展。针对这一问题,将超级电容器作为功率调节装置,控制 光伏并网系统按指定值平滑、准确地输出功率,使光伏发电具有可调度性。在分析了超级电容特性、系统构成 和双向 DC/DC 变换器状态空间平均小信号模型的基础上,提出功率、电流双闭环反馈滞环电流控制策略,控制 超级电容器吸收或补充输出功率的波动成分。 在 PSCAD/EMTDC 电力系统仿真软件中构建仿真模型, 对提出的 系统和控制策略进行了仿真分析,良好的仿真结果验证了方法的可行性。 关键词:超级电容器;光伏并网;DC/DC 变换器;滞环控制 doi:10.3969/j.issn.2095-4239.2013.03.006 中图分类号:TQ 028.8 文献标志码:A 文章编号:2095-4239(2013)03-222-05 Supercapacitors for power control in a grid-connected photovoltaic system JIANG Zhe,YIN Zhongdong (State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206) Abstract: Output power of a grid-connected photovoltaic power generation system is often random and fluctuant. This is harmful to the stability of the power system, the photovoltaic power consumption and power quality,and therefore restricts the development of PV generation. To address these issues, supercapacitors were adopted as a power regulating device. This controls the grid-connected photovoltaic system to enable output power according to a preset condition in a smooth and stable manner. In this paper, an analysis is done on the supercapacitor characteristics,system structure and small-signal model of the bi-directional DC / DC converter. Based on the analysis, a