基于DSP的并联型三电平有源电力滤波器的研究
发布时间：2019-02-13 10:28
【摘要】：随着电力电子装置的广泛应用,电力系统的谐波问题日益严重,谐波成为影响电能质量的主要因素。有源电力滤波器被公认为是治理电网谐波及无功污染、改善电能质量最有效的手段,具有响应速度快、补偿精度高、体积小、智能化程度高等特点,在国外已经投入实际应用。在国内对有源电力滤波器的研究还处在开始阶段,本课题是与山东比亚科技有限公司合作,研究设计补偿能力为50A的低压并联型三电平有源电力滤波器。 本文首先介绍了并联型有源电力滤波器的基本原理,选择的二极管箝位型逆变电路的主电路拓扑结构,具有降低功率器件耐压值,提高等效开关频率,改善输出波形质量等优点。多电平技术成为有源电力滤波器的应用趋势。 谐波电流的检测方法和电流跟踪控制方法是有源电力滤波器具有良好补偿性能的关键。本文介绍了采用的两种检测算法：基于滑窗迭代离散傅里叶变换的检测算法和基于瞬时无功理论的d-q检测算法。两种方法各有优缺点,适应于不同的应用场合和补偿要求。本次设计通过仿真分析多种控制方法,确定选择的电流跟踪控制方法是无差拍电流控制和空间矢量PWM调制相结合的控制算法,本文重点介绍了基于周期预测的无差拍控制算法和基于60°坐标系的空间矢量PWM算法的基本原理。 主电路及其参数的设计是有源电力滤波器实际产品设计的关键之一,能直接影响有源电力滤波器的实际补偿效果。本文对三电平并联型有源电力滤波器的主电路进行深入研究,主要包括逆变电路、缓冲电路、高频滤波电路、充电电路以及EMI滤波电路的电路设计。主电路主要参数的计算没有通用的方法,本文通过建立三电平有源电力滤波器的主电路数学模型,采用理论分析和仿真验证相结合的方法确定直流母线电压、直流母线储能电容和交流侧输出电感的参数。 控制系统是有源电力滤波器的核心,直接影响其补偿性能和功能的实现。本文采用了基于数字信号处理器TMS320F28335的全数字化控制系统的实现方案,并对控制系统的硬件电路和软件系统设计进行了研究。控制系统硬件电路主要包括电源电路、信号检测与调理电路、硬件保护电路、IGBT驱动电路以及RS485通讯电路等电路；控制系统的软件设计包括主程序和中断程序的设计。 本文结合选择的检测方算法和控制策略,在MATLAB/Simulink环境下建立了系统仿真模型,仿真有源电力滤波器的启动和运行过程,并通过仿真验证主电路参数对补偿效果的影响,确定相关参数。主电路仿真模型和检测与控制算法仿真模型的结合实现了并联型有源电力滤波器的系统整体仿真,为进一步的系统设计提供分析依据。
[Abstract]:With the wide application of power electronic devices, the harmonic problem of power system becomes more and more serious, and harmonic becomes the main factor that affects the power quality. Active power filter (APF) is recognized as the most effective means to control harmonic and reactive power pollution and improve power quality. It has the characteristics of fast response speed, high compensation accuracy, small size and high intelligence. It has been put into practical application abroad. The research of active power filter in China is still in the beginning stage. This project is to design a low-voltage shunt three-level active power filter with compensation capacity of 50A in cooperation with Shandong Biya Science and Technology Co., Ltd. In this paper, the basic principle of shunt active power filter is introduced, and the main circuit topology of diode clamped inverter circuit is selected, which can reduce the voltage value of power device and increase the equivalent switching frequency. Improve the quality of output waveform and other advantages. Multilevel technology has become the application trend of active power filter (APF). The harmonic current detection method and current tracking control method are the key to the good compensation performance of active power filter (APF). This paper introduces two detection algorithms: one based on sliding window iterative discrete Fourier transform and the other based on instantaneous reactive power theory. The two methods have their own advantages and disadvantages and are suitable for different applications and compensation requirements. Through simulation and analysis of various control methods, this design determines that the selected current tracking control method is a combined control algorithm of deadbeat current control and space vector PWM modulation. This paper focuses on the basic principles of the beat free control algorithm based on periodic prediction and the space vector PWM algorithm based on 60 掳coordinate system. The design of the main circuit and its parameters is one of the key points in the practical product design of the active power filter, which can directly affect the actual compensation effect of the active power filter. In this paper, the main circuit of three-level shunt active power filter is studied, including inverter circuit, buffer circuit, high frequency filter circuit, charging circuit and EMI filter circuit. There is no universal method to calculate the main parameters of the main circuit. In this paper, the main circuit mathematical model of the three-level active power filter is established, and the DC bus voltage is determined by the combination of theoretical analysis and simulation verification. DC bus energy storage capacitance and AC side output inductance parameters. The control system is the core of active power filter, which directly affects its compensation performance and function. In this paper, the realization scheme of full digital control system based on digital signal processor (TMS320F28335) is adopted, and the hardware circuit and software design of the control system are studied. The hardware circuit of the control system mainly includes power supply circuit, signal detection and conditioning circuit, hardware protection circuit, IGBT drive circuit and RS485 communication circuit, etc. The software design of the control system includes the design of the main program and the interrupt program. In this paper, combined with the algorithm and control strategy of the selected detector, the system simulation model is established in MATLAB/Simulink environment to simulate the start-up and operation of APF, and the effect of main circuit parameters on the compensation effect is verified by simulation. Determine the relevant parameters. Combining the main circuit simulation model and the detection and control algorithm simulation model, the whole system simulation of shunt active power filter is realized, which provides the analysis basis for further system design.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761;TN713.8
本文编号：2421460
[Abstract]:With the wide application of power electronic devices, the harmonic problem of power system becomes more and more serious, and harmonic becomes the main factor that affects the power quality. Active power filter (APF) is recognized as the most effective means to control harmonic and reactive power pollution and improve power quality. It has the characteristics of fast response speed, high compensation accuracy, small size and high intelligence. It has been put into practical application abroad. The research of active power filter in China is still in the beginning stage. This project is to design a low-voltage shunt three-level active power filter with compensation capacity of 50A in cooperation with Shandong Biya Science and Technology Co., Ltd. In this paper, the basic principle of shunt active power filter is introduced, and the main circuit topology of diode clamped inverter circuit is selected, which can reduce the voltage value of power device and increase the equivalent switching frequency. Improve the quality of output waveform and other advantages. Multilevel technology has become the application trend of active power filter (APF). The harmonic current detection method and current tracking control method are the key to the good compensation performance of active power filter (APF). This paper introduces two detection algorithms: one based on sliding window iterative discrete Fourier transform and the other based on instantaneous reactive power theory. The two methods have their own advantages and disadvantages and are suitable for different applications and compensation requirements. Through simulation and analysis of various control methods, this design determines that the selected current tracking control method is a combined control algorithm of deadbeat current control and space vector PWM modulation. This paper focuses on the basic principles of the beat free control algorithm based on periodic prediction and the space vector PWM algorithm based on 60 掳coordinate system. The design of the main circuit and its parameters is one of the key points in the practical product design of the active power filter, which can directly affect the actual compensation effect of the active power filter. In this paper, the main circuit of three-level shunt active power filter is studied, including inverter circuit, buffer circuit, high frequency filter circuit, charging circuit and EMI filter circuit. There is no universal method to calculate the main parameters of the main circuit. In this paper, the main circuit mathematical model of the three-level active power filter is established, and the DC bus voltage is determined by the combination of theoretical analysis and simulation verification. DC bus energy storage capacitance and AC side output inductance parameters. The control system is the core of active power filter, which directly affects its compensation performance and function. In this paper, the realization scheme of full digital control system based on digital signal processor (TMS320F28335) is adopted, and the hardware circuit and software design of the control system are studied. The hardware circuit of the control system mainly includes power supply circuit, signal detection and conditioning circuit, hardware protection circuit, IGBT drive circuit and RS485 communication circuit, etc. The software design of the control system includes the design of the main program and the interrupt program. In this paper, combined with the algorithm and control strategy of the selected detector, the system simulation model is established in MATLAB/Simulink environment to simulate the start-up and operation of APF, and the effect of main circuit parameters on the compensation effect is verified by simulation. Determine the relevant parameters. Combining the main circuit simulation model and the detection and control algorithm simulation model, the whole system simulation of shunt active power filter is realized, which provides the analysis basis for further system design.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761;TN713.8
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