基于滑模控制的飞轮储能直接功率母线电压控制策略研究  

Sliding Mode Control-based Strategy for Direct Bus Voltage Control in Flywheel Energy Storage

作　　者：吕宪超 LV Xianchao(China Railway 22 nd Bureau Group Electrification Engineering Co.,Ltd.,Beijing 100144,China)

机构地区：[1]中铁二十二局集团电气化工程有限公司,北京100144

出　　处：《电工技术》2024年第7期1-4,共4页Electric Engineering

摘　　要：飞轮储能以其瞬时充放电功率大、功率密度高等特点而在储能微电网、大功率UPS中得到广泛应用。飞轮系统可快速输出能量,调节微电网输出频率和电压。然而,储能飞轮在宽速度范围放电时,很难兼顾输出电压的高动态响应和低速稳定性,严重影响了动态性能和放电深度。为提高飞轮储能在放电模式下的动态响应速度和稳定性,提出了一种基于积分滑模控制的固定开关频率直接功率控制策略。该控制策略兼顾了高动态性和飞轮低速稳定性,在负载突变时电压调整率提高了45%,在低速段也能稳定跟随跟定电压,飞轮的利用率提高了7.5%。最后通过仿真分析验证了该控制策略的可行性。Due to its high instantaneous power and power density,flywheel energy storage has found wide application in energy storage microgrids and high-power UPS systems.Flywheel systems can quickly disburse energy which facilitates regulation of output frequency and voltage of microgrids.However,when the energy storage flywheel is discharging in a wide speed range,it is difficult to avoid mutual exclusion of high dynamic response and low speed stability,and consequently dynamic performance and discharge depth of the flywheel are seriously affected.To improve dynamic response and stability of flywheel energy storage in discharge mode,this paper puts forward sliding mode control-based constant-switch-frequency direct power control strategy.The control strategy facilitates simultaneously high dynamic performance and low speed stability and improves flywheel′s utilization rate by 7.5%,as it makes the flywheel to achieve a 45% increment of load mutation voltage recovery time,and to maintain stable following voltage within low speed section.The feasibility of this control strategy is confirmed through simulation analysis.

关 键 词：飞轮储能 动态响应 滑模控制 电池放电深度 

分 类 号：TM761[电气工程—电力系统及自动化]