摘要
飞轮储能系统将能量以机械能的形式储存在高速旋转的飞轮转子中。与传统化学电池相比,飞轮储能系统优势明显,已获得了广泛的应用。为了解决电网电压对称跌落所带来的直流负载端电压暂降问题,给出了基于飞轮储能系统的直流UPS系统电路拓扑及控制方法。在电网电压正常时,飞轮电机采用速度外环、电流内环的双闭环控制策略加速充电或恒速待机;在电网电压发生对称跌落时,飞轮电机采用电压外环、电流内环的双闭环控制策略减速放电。提出了电流内环控制器的零极点对消降阶设计方案,采用对称优化函数等效法设计了速度外环及电压外环控制器参数,并对设计的控制器进行了稳定性分析。通过Matlab/Simulink仿真对该控制方法进行了验证。结果表明,该控制方法及所设计的控制器参数能准确控制飞轮电机运行模式,稳定直流负载端电压,保护直流负载不受电网电压跌落的影响。
Flywheel energy storage system（ FESS）,which stores energy in a rotating mass,is a kind of mechanical energy storage system. FESS is now considered a promising technology for many applications due to its significant advantages versus batteries. In order to solve the voltage sag problem of DC load introduced by the grid voltage symmetric falling,this paper first presents the topology and control method of FESS based DC UPS. When the grid voltage is normal,the strategy based on an outer speed loop cascaded with an inner current loop is used. When the grid voltage falls symmetrically,the strategy based on an external DC-bus voltage loop cascaded with an internal current loop is used. Then a zero-pole offset order-reduction design method for inner current loop is proposed,while the control parameters of outer speed and outer DC-bus voltage loops are designed through using the symmetric optimum function equivalency method. And the stabilities of designed controllers are analyzed. This control method is verified by simulation in Matlab /Simulink. The simulation results indicate that this control method and the designed controller parameters can control the flywheel motor＇s operation mode accurately,stabilize the DC load voltage and make voltage-sensitive DC load not affected by grid power interruption.
出处
《电工电能新技术》
CSCD
北大核心
2014年第10期16-22,共7页
Advanced Technology of Electrical Engineering and Energy
基金
国家高技术研究发展计划(863)(2011AA05A113)
国家自然科学基金(51207156)
中科院知识创新工程重要方向(KGCX2-EW-330)资助项目
关键词
飞轮储能系统
直流不间断电源
充放电控制
永磁同步电机
Flywheel Energy Storage System（FESS）
DC uninterruptable power supply（DC UPS）
charge and discharge control
permanent magnet synchronous motor（PMSM）
