摘要
适当地选择元件参数,电感双电容电路(inductorcapacitor-capacitor,LCC)能代替传统逆变器中的电感电容型/电感电容电感型滤波器,还能自动调节其输出电压。负载变化时,只要保持输入电压不变,LCC将自动调节其输出电压,使其等于负载变化前的状态。因此,在三相逆变系统中,只要保持输入电压对称,则无论负载是否对称,LCC逆变系统输出电压的稳态分量总是对称的,不对称负载对LCC逆变系统的输出电压没有影响。在输入端引入另一个由负载电流控制的电压分量,LCC则能补偿非线性负载引起的谐波输出电压,从而有效控制输出电压的质量。根据LCC逆变系统的自调节特点,提出参数在线调节的前馈控制方式,在满足控制精度的前提下,提高了控制的响应速度和稳定性。通过仿真和实验验证了该文提出的逆变系统、控制系统和控制方法的正确性。
By designing the inductance and capacitance properly, the inductor-capacitor filter or inductor-capacitorinductor filter（LC/LCL filter） in the conventional inverter may be replaced by inductor-capacitor-capacitor（LCC） circuit. At the same time, the output voltage of LCC circuit is able to be adjusted in autonomous. When the load changes, as long as the input voltage unchanged, the output voltage of the LCC can be adjusted autonomously to the level before the load change. So in the three-phase inverter, the output voltage always keeps the symmetric as long as the input voltage of LCC is controlled to the symmetric whether the loads are symmetric or not. For the nonlinear load, another input voltage, determined by the load current, is introduced to compensate the output harmonic voltage induced by the nonlinear load. Because the output voltage of LCC can be adjusted in autonomous, the forward controller with the parameter adjusting online is applied in the LCC controller. And the output voltage of LCC is controlled quickly and accurately. LCC inverter with the corresponding control method is verified by simulations and the experiments.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第2期426-433,共8页
Proceedings of the CSEE
基金
国家自然科学基金项目(50777066)~~
关键词
LCC逆变系统
自调节
非线性负载
不对称负载
电压质量控制
inductor-capacitor-capacitor（LCC） inverter
self-adjusting
nonlinear load
asymmetric load
voltage quality control
