摘要
对引入系统电压前馈并采用P控制器的静止坐标系下三角波比较法的幅频特性和相频特性进行了详细的理论研究。首先用微分方程定量地推导出了该算法所带来的幅值差和相位差,然后用相量图推导出数字化实现时控制器的延时对算法所固有的幅值差和相位差的影响。在实际装置中,以上述理论为指导对三角波比较法进行了幅值和相位补偿。实验结果验证了文中理论分析的正确性。
A detailed theoretical study is made on the amplitude-and phase-frequency characteristics of the static coordinate ramp comparison method with proportional controller and system voltage feedforward,which is one of the currently most widely used control methods.First,the theoretical amplitude and phase difference due to the ramp comparison method are quantitatively derived using differential equations.Then the influence of digital controller delay on the inherent amplitude and phase difference of the current control algorithm is graphically derived using the phasor graph.Finally,an actual amplitude and phase compensation method for ramp comparison current controller is proposed.Experimental results have verified the correctness of the above-mentioned theoretical analysis.
出处
《电力系统自动化》
EI
CSCD
北大核心
2010年第16期69-72,共4页
Automation of Electric Power Systems
关键词
三角波比较法
电压型变流器
数字控制器
ramp comparison control
voltage source converter
digital controller
