摘要
高升压比Y源并网逆变器解决了传统光伏并网逆变器不能直通的问题,并利用直通时间的插入来进行升压,通过较小的直通占空比就可以获得较高的电压增益。介绍了一种适用于高升压比Y源并网逆变器的能量成型控制策略,解决了传统PI控制鲁棒性差、控制速度慢等不足。通过确定系统期望的稳定平衡点并配置能量函数,建立系统的PCH模型以获得系统的耗散能量和反馈控制注入能量,然后设计控制器参数以在反馈控制能量的作用下,不断调整其自身储存的能量,使系统稳定在所需的平衡点。最后利用MATLAB/Simulink仿真软件对高升压比Y源并网逆变器进行仿真验证,结果表明对于不同给定输入扰动,能量成型控制器都可以很好地满足控制目标。
The high boost ratio Y-source grid-connected inverter solves the problem that traditional photovoltaic grid-connected inverters cannot pass through,and uses the through-time insertion to perform the boost.The smaller pass-through duty ratio can achieve higher voltage gain.An energy-shaping control strategy suitable for Y-source grid-connected inverters with high boost ratio was introduced,solving the traditional PI control disadvantages of poor robustness and slow control speed.By determining the desired stable equilibrium point of the system and configuring the energy function,the PCH model of the system was established to obtain the system's dissipated energy and feedback control injection energy,and then the controller parameters were designed to continuously adjust its own storage energy under the effect of feedback control energy to stabilize the system at the desired equilibrium point.MATLAB/Simulink simulation software was used to verify the high boost ratio Y-source grid-connected inverter.The results show that for different given input disturbance,the energy-shaping controller can well meet the control objectives.
作者
张世刚
田立欣
刘广忱
ZHANG Shi-gang;TIAN Li-xin;LIU Guang-chen(Inner Mongolia University of Technology,Huhhot Inner Mongolia 010080,China)
出处
《电源技术》
CAS
北大核心
2020年第8期1191-1198,共8页
Chinese Journal of Power Sources
基金
国家自然科学基金(51867020)。
关键词
无源系统
能量成型
高升压比Y源并网逆变器
PCH模型
passive system
energy-shaping
high boost ratio Y-source grid-connected inverter
PCH model
