摘要
充放电机变换器是实现网侧电能和蓄电池储能交换的关键装置,同时可以消除谐波、实现单位功率因数运行,是一个多输入、多输出的非线性系统。在同步旋转坐标系中,三相电压型PWM变换器的d、q轴电流之间存在耦合,导致有功电流和无功电流不能独立控制。采用交叉解耦控制虽可以获得较好的稳态性能,但暂态性能较差,影响充放电机的工作性能。所采用的状态反馈解耦控制策略电流超调量小,调节时间短,非常适用于充放电机的变换器。仿真实验验证了控制策略的可行性和有效性。
Charging and discharging machine＇s converter,which is a nonlinear system with multi-input and multi-output,is a key equipment to achieve the energy exchange of grid-side and battery and can eliminate harmonics to achieve unity power factor operation.In synchronous rotation coordinates,there is a coupling between the current of d-axis and q-axis of the three-phase voltage source PWM converter,which results in the failure of independent control of active current and reactive current.Although the use of cross-decoupling control can get a better steady-state performance,the transient performance is unsatisfied,which will affect the working performance of the charging and discharging machine.This paper uses the state-feedback decoupling control strategy whose current overshoot is small and settling time is short,which is very suitable for the charging and discharging machine.The simulation conclusions validate the feasibility and effectiveness of the control strategy.
出处
《电子技术应用》
北大核心
2014年第10期120-123,共4页
Application of Electronic Technique
基金
国家自然科学基金(61205076)
上海市研究生创新基金项目(JWCXSL1302)
关键词
充放电机
同步旋转坐标系
电压型PWM变换器
状态反馈解耦
charging and discharging machine
synchronous rotation coordinates
voltage source PWM converter
state-feedback decoupling
