基于复合控制的并联型有源滤波器的研究
发布时间：2018-08-03 14:55
【摘要】：随着科学技术的不断发展,各种电力电子装置在生产生活中的普遍使用带来了谐波污染问题，，对电网造成了严重影响，谐波的有效治理成为人们关注的话题。有源滤波器因为补偿精度高、动态性能好、受电网系统参数变化影响小等优势，成为解决电网谐波和无功问题的重要工具。 有源电力滤波器的具体工作方法是在电网中发出与谐波电流相反的补偿电流，实现电网电流趋于正弦波，其补偿性能主要取决于在稳态时的补偿精度和动态调整过程当中的响应快慢。对于有源滤波器的研究主要包含下列工作： 第一在三相静止a-b-c坐标系下建立三相三线制并联型APF的数学模型，经过系列坐标变换确立了其在d-q同步旋转坐标系下的数学模型，为电流环的设计和解耦控制提供依据。 第二对谐波的提取使用基于瞬时无功功率理论的i p iq法，采用三相软件锁相环得出电网相位角以便于谐波检测和电流控制，对于SVPWM控制技术中存在的死区问题进行了分析补偿。 第三在控制策略上对PI控制器和重复控制器分别进行了设计，考虑到传统的PI控制只能对直流信号做到无静差跟踪，而对于由不同频率交流信号叠加而成的APF谐波给定信号跟踪效果较差。因此，本文懫用PI和重复控制相结合的复合控制方法,同时兼顾了重复控制的高控制精度和PI控制的优良鲁棒性。通过MATLAB仿真结果验证了本文中理论分析的正确性。 第四为满足APF系统要求的多通道数据同步采集和实时补偿的要求，在实验室现有的PWM整流器平台上，拓展了两片ADS8365设计了12通道高速同步采样电路，对APF主电路中的电感、直流侧电容进行了设计。
[Abstract]:With the continuous development of science and technology, the widespread use of various power electronic devices in production and life has brought harmonic pollution, which has caused serious impact on the power grid. The effective treatment of harmonics has become a topic of concern. Active power filter (APF) has become an important tool to solve the problem of harmonic and reactive power because of its advantages of high compensation precision, good dynamic performance and little influence on the change of power system parameters. The specific working method of active power filter is to send out the compensation current opposite to the harmonic current in the power network, so that the current of the power network tends to sinusoidal wave. The compensation performance mainly depends on the compensation accuracy in the steady state and the response speed in the dynamic adjustment process. The research of active power filter mainly includes the following work: first, the mathematical model of three-phase three-wire shunt APF is established in three-phase static a-b-c coordinate system. The mathematical model in d-q synchronous rotating coordinate system is established through a series of coordinate transformation, which provides the basis for the design and decoupling control of the current loop. The second harmonic extraction uses the i p iq method based on instantaneous reactive power theory, using three-phase software phase-locked loop to obtain the power grid phase angle for harmonic detection and current control. The dead zone problem in SVPWM control technology is analyzed and compensated. Thirdly, Pi controller and repetitive controller are designed in control strategy, considering that traditional Pi control can only track DC signal without static error. However, the tracking effect of APF harmonic signal which is superimposed by different frequency AC signals is poor. Therefore, in this paper, the combination of Pi and repetitive control is used, and the high control precision of repetitive control and the excellent robustness of Pi control are considered at the same time. The correctness of the theoretical analysis is verified by MATLAB simulation. Fourth, in order to meet the requirements of multi-channel synchronous data acquisition and real-time compensation for APF system, two pieces of ADS8365 are extended to design 12-channel high-speed synchronous sampling circuit on the platform of PWM rectifier in laboratory. The inductance of APF main circuit is analyzed. The DC side capacitance is designed.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713.8;TM761
本文编号：2162102
[Abstract]:With the continuous development of science and technology, the widespread use of various power electronic devices in production and life has brought harmonic pollution, which has caused serious impact on the power grid. The effective treatment of harmonics has become a topic of concern. Active power filter (APF) has become an important tool to solve the problem of harmonic and reactive power because of its advantages of high compensation precision, good dynamic performance and little influence on the change of power system parameters. The specific working method of active power filter is to send out the compensation current opposite to the harmonic current in the power network, so that the current of the power network tends to sinusoidal wave. The compensation performance mainly depends on the compensation accuracy in the steady state and the response speed in the dynamic adjustment process. The research of active power filter mainly includes the following work: first, the mathematical model of three-phase three-wire shunt APF is established in three-phase static a-b-c coordinate system. The mathematical model in d-q synchronous rotating coordinate system is established through a series of coordinate transformation, which provides the basis for the design and decoupling control of the current loop. The second harmonic extraction uses the i p iq method based on instantaneous reactive power theory, using three-phase software phase-locked loop to obtain the power grid phase angle for harmonic detection and current control. The dead zone problem in SVPWM control technology is analyzed and compensated. Thirdly, Pi controller and repetitive controller are designed in control strategy, considering that traditional Pi control can only track DC signal without static error. However, the tracking effect of APF harmonic signal which is superimposed by different frequency AC signals is poor. Therefore, in this paper, the combination of Pi and repetitive control is used, and the high control precision of repetitive control and the excellent robustness of Pi control are considered at the same time. The correctness of the theoretical analysis is verified by MATLAB simulation. Fourth, in order to meet the requirements of multi-channel synchronous data acquisition and real-time compensation for APF system, two pieces of ADS8365 are extended to design 12-channel high-speed synchronous sampling circuit on the platform of PWM rectifier in laboratory. The inductance of APF main circuit is analyzed. The DC side capacitance is designed.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713.8;TM761
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