摘要
“双碳”目标的实施和新型电力系统的建设极大推动了可再生能源并网发电进程,电力系统的结构也因此发生巨大改变。由于可再生电源无法参与电网的惯性和阻尼调节过程,并网后极易造成电网频率失调、负载功率失稳现象。因此,文中提出一种基于虚拟同步机(virtual synchronous generator,VSG)技术的风-光-储系统自适应调频控制策略。首先,在风-光-储VSG系统结构基础上建立数学模型,并分析VSG技术调频特性;然后,综合考虑风电、光伏发电曲线,依托储能系统数学模型提出基于模糊控制的虚拟阻尼和虚拟惯量的自适应调频控制策略;最终,基于风-光-储微电网模型开展仿真验证,分析可知,采用文中控制策略可在大幅降低风、光电源侧及负荷侧波动所引起的频率波动过程基础上缩短响应时间,并提高电网输出功率稳定性。
The implementation of the“two⁃carbon”target and the construction of new power system have greatly pro⁃moted the process of connecting renewable energy to the grid and the structure of the power system has therefore also changed greatly.Since the renewable power source has no way to participate in the inertia and damping adjustment process of the grid,it is prone to cause frequency imbalance of the grid and the instability of the load power after grid connection.Therefore,a kind of adaptive frequency modulation control strategy for wind⁃optical storage system based on virtual synchronous generator(VSG)technology is proposed in this paper.Firstly,a mathematical model is set up on the basis of VSG system structure,and the frequency modulation characteristics of VSG technology are analyzed.Then,considering wind power and photovoltaic power generation curves comprehensively and relying on the mathe⁃matical model of energy storage system,an adaptive frequency modulation control strategy based on fuzzy control of virtual damping and virtual inertia is proposed.Finally,the simulation verification is carried out based on the wind⁃optical⁃storage microgrid model.It is known through analysis that the adoption of the control strategy proposed in this paper can shorten the response time and improve the power output stability on the basis of significantly reducing the frequency fluctuation process caused by the fluctuations of wind and optical power supply side and load side.
作者
郑云平
亚夏尔·吐尔洪
ZHENG Yunping;YAXAR·Turgun(Electric Power Research Institute of State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830011,China)
出处
《高压电器》
CAS
CSCD
北大核心
2023年第7期12-19,共8页
High Voltage Apparatus
基金
国网新疆电科院科技项目(2022年构网型储能对电网安全稳定支撑技术服务项目)。
关键词
虚拟同步发电机
自适应控制
模糊控制
构网型
virtual synchronous generator
adaptive control
fuzzy control
grid⁃forming
