有源调谐型混合电力滤波器他励直流稳压电源的研究

发布时间：2018-08-18 08:19

【摘要】：近年来,由于电力电子技术的飞速发展,由此所带来的谐波问题越来越受到人们的重视和关注,因此,谐波的治理成为人们面临的一个重大问题。无源电力滤波器能同时补偿无功与谐波,且结构简单,但是它只能补偿固定次数的谐波,且易与电网发生谐振。有源电力滤波器可以动态补偿,滤波性能好、响应速度快,且可以同时滤除多次谐波,但缺点是造价高、容量小,只能应用在低压系统。本文所研究的有源调谐型混合电力滤波器结合了二者的优点,既降低了有源电力滤波器的容量,又可以实现多调谐,具有广泛的应用前景。为了使得有源调谐型混合电力滤波器(Active Tuned Hybrid Power Filter——ATHPF)能正常工作,达到良好的谐波补偿效果,有源电力滤波器(APF)的直流侧电压必须达到一定的电压值,而且保持恒定。本文采用他励电源为ATHPF逆变器的直流侧电容提供电压,他励方式不但可以稳定直流电压,同时还有抑制APF在动态谐波补偿中直流电压波动的作用。本文分析了他励电源的稳压及动态调节机理,并通过理论分析给出了他励式ATHPF中他励电源直流侧电压、容量选择及主电路参数的设计方法,为他励电源的设计提供了基本的参考依据;同时,他励电源采用电压电流的双闭环控制的控制策略,保证了他励电源为APF直流侧电容提供稳定的电压,从而使得他励式有源调谐型混合电力滤波器具有良好的滤波效果。搭建了有源调谐型混合电力滤波器的Simulink仿真模型与RT-LAB实时仿真模型,对系统在不同工况下的Simulink仿真与RT-LAB实时仿真结果做了分析。Simulink仿真和RT-LAB实时仿真结果验证了所给出的他励稳压电源的直流侧电压、容量选择方法、主电路参数设计及控制策略的正确可行性。
[Abstract]:In recent years, due to the rapid development of power electronics technology, the harmonic problem has been paid more and more attention. Therefore, the management of harmonics has become a major problem. The passive power filter can compensate reactive power and harmonic simultaneously, and its structure is simple, but it can only compensate the harmonics of fixed number, and it can easily resonate with the power network. Active power filter (APF) can be compensated dynamically, has good filtering performance, fast response speed, and can filter multiple harmonics simultaneously. However, it can only be used in low voltage system because of its high cost and small capacity. The active tunable hybrid power filter studied in this paper not only reduces the capacity of the active power filter, but also can realize multiple tuning, so it has a wide application prospect. In order to make the active tuned hybrid power filter (Active Tuned Hybrid Power Filter--ATHPF) work normally and achieve a good harmonic compensation effect, the DC side voltage of the active power filter (APF) must reach a certain voltage value and keep constant. In this paper, a shunt source is used to supply the voltage for the DC side capacitance of ATHPF inverter, which can not only stabilize the DC voltage, but also restrain the DC voltage fluctuation of APF in the dynamic harmonic compensation. In this paper, the principle of voltage stabilization and dynamic regulation is analyzed, and the design method of DC side voltage, capacity selection and main circuit parameters of ATHPF is given through theoretical analysis. At the same time, the control strategy of double closed loop control of voltage and current is used to ensure the stable voltage of APF DC side capacitor. Therefore, it makes the active tunable hybrid power filter with other excitation have good filtering effect. The Simulink simulation model and RT-LAB real time simulation model of active tuned hybrid power filter are built. The results of Simulink simulation and RT-LAB real-time simulation of the system under different operating conditions are analyzed. Simulink simulation and RT-LAB real-time simulation results verify the DC side voltage and capacity selection method. The design of main circuit parameters and the correct feasibility of control strategy.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM761;TM46

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