基于比例正弦幅值积分器的地铁二重化能馈变流器控制
发布时间：2018-10-20 15:02
【摘要】：将正弦幅值积分器(SAI)应用于地铁二重化能馈变流器,在静止坐标系下简化了变流器的控制,同时提高了变流器的控制性能。从SAI的数字实现出发,在离散域对其进行频率响应分析,得到离散化SAI实际特性与连续域理想模型的差异,针对两者存在的差异提出了线性预测相位补偿方法。为了提高电流环的动态性能,提出在电流控制环引入虚拟解耦项,削弱电流控制对SAI的依赖,以此提高电流环的响应速度。提出在电压外环采用电压平方反馈进行闭环控制方法,通过压差修正控制保证2组串联变流器均压,并通过直流输入电流比例前馈进一步提高电压环响应性能。仿真和实验验证了所提控制策略的正确性与有效性。
[Abstract]:The sinusoidal amplitude integrator (SAI) is applied to the subway duplex energy fed converter. The control of the converter is simplified in the stationary coordinate system and the control performance of the converter is improved at the same time. Based on the digital realization of SAI, the frequency response of SAI is analyzed in discrete domain, and the difference between discrete SAI and continuous ideal model is obtained. A linear predictive phase compensation method is proposed for the difference between them. In order to improve the dynamic performance of the current loop, a virtual decoupling term is introduced in the current control loop, which weakens the dependence of current control on SAI, and thus improves the response speed of the current loop. A closed loop control method using voltage square feedback in the voltage outer loop is proposed. The voltage equalization of the two series converters is guaranteed by the pressure difference correction control, and the response performance of the voltage loop is further improved by the proportional feedforward of DC input current. Simulation and experiment verify the correctness and effectiveness of the proposed control strategy.
【作者单位】： 东南大学电气工程学院;国电南京自动化股份有限公司;
【分类号】：U231.8
，
本文编号：2283515
[Abstract]:The sinusoidal amplitude integrator (SAI) is applied to the subway duplex energy fed converter. The control of the converter is simplified in the stationary coordinate system and the control performance of the converter is improved at the same time. Based on the digital realization of SAI, the frequency response of SAI is analyzed in discrete domain, and the difference between discrete SAI and continuous ideal model is obtained. A linear predictive phase compensation method is proposed for the difference between them. In order to improve the dynamic performance of the current loop, a virtual decoupling term is introduced in the current control loop, which weakens the dependence of current control on SAI, and thus improves the response speed of the current loop. A closed loop control method using voltage square feedback in the voltage outer loop is proposed. The voltage equalization of the two series converters is guaranteed by the pressure difference correction control, and the response performance of the voltage loop is further improved by the proportional feedforward of DC input current. Simulation and experiment verify the correctness and effectiveness of the proposed control strategy.
【作者单位】： 东南大学电气工程学院;国电南京自动化股份有限公司;
【分类号】：U231.8
，
本文编号：2283515
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