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论文摘要内容

题名:

 具有谐波补偿功能的光伏并网控制器设计

作者:

 张成龙

语种:

 chi

学科:

 电力系统及其自动化

学位:

 工程硕士

学校:

 南京工程学院

院系:

 电力工程学院

专业:

 电气工程

导师姓名:

 杨志超

第二导师姓名:

 葛乐

完成日期:

 2015-05-20

题目(外文):

 Research on PV System Controller With Harmonic Compensation Functions

关键字(中文):

 光伏逆变器 谐波检测 重复控制 自抗扰控制 谐波补偿

关键字(外文):

 Photovoltaic inverter Harmonic detection Repetitive control ADRC Harmonic compensation

文摘:

 

分布式光伏发电的大规模应用,促进了并网逆变器研究的不断深入,利用光伏电站参与电网电能质量治理已成为一个重要的研究领域。本文针对光伏逆变器实现并网发电与谐波治理的统一控制,提出了一种基于重复与自抗扰的复合控制算法,并在NI Single-Board RIO平台上设计开发了光伏并网统一控制器。通过硬件在环 (hardware-in-the-loop,HIL) 仿真测试,验证了控制算法的可行性及控制器功能的完整性。本文主要研究工作如下。

(1)分析三相三线制光伏并网逆变器与并联型有源电力滤波器的拓扑结构特点,在三相静止坐标系下,建立系统的动力学模型,并分析结构参数对系统性能的影响。研究瞬时无功功率理论,对比分析p-q法与ip-iq法的优缺点,通过仿真验证了电网电压畸变对ip-iq法谐波检测精度影响较小,从而在控制器设计谐波检测模块采用ip-iq法。

(2)针对电流跟踪控制中,单一控制算法难以同时保证电流跟踪控制稳态精度和动态性能,提出一种重复自抗扰复合控制算法。利用重复控制对周期性误差补偿的特性,减小电流跟踪的稳态误差,同时利用自抗扰控制算法的强鲁棒性特点,增强了系统的动态性能。运用复合控制方法设计了电流跟踪控制的基本控制律,并通过仿真验证了控制算法电流跟踪的动态和稳态性能。

(3)本文基于NI Single-Board RIO平台,采用LabVIEW语言编程,在FPGA上完成ip-iq检测、电流跟踪控制等功能模块设计,通过 Multisim软件搭建模拟电网、非线性负载及逆变器主电路,与Single-Board RIO构建硬件在环仿真系统,测试结果表明,控制器实现了并网发电与谐波治理的统一控制。

文摘(外文):

 

With the mass rollout of solar photovoltaic (PV) power,the research of grid connected photovoltaic inverter is gradually deeper. An important research direction in the photovoltaic inverter applications is the using of photovoltaic inverter for power quality management. Aiming at the unified control of PV with harmonics function, a composite control algorithm based on repetitive control and active disturbance rejection control(ADRC) is proposed. The main structure of unified controller is designed in the NI Single-Board RIO platform. The HIL simulation results verify the integrity and the feasibility of algorithms.

The topology of photovoltaic system and active filter are analyzed. The feasibility of unified control is analyzed by theoretical. The system dynamics model is created to analyze its working mechanism and dynamic characteristics. The characteristics of the two typical methods p-q and ip-iq are deeply analyzed. Based on the effect of grid voltage distortion on the detection accuracy of ip-iq is smaller, the ip-iq is used in harmonic detection module.

To ensure the static and dynamic performance of control strategy, a composite control algorithm is proposed based on repetitive control and ADRC. The characteristics of the system are theoretical analyzed. For harmonic compensation performance requirements, the complex control is designed to achieve a stable control of the current track. It effectively improves the overall dynamic and static performance.

On the basis of previous research on the theory of algorithms, the algorithms are design in the FPGA based on NI Single-Board RIO. The controller realizes harmonic detection, grid generation, harmonic compensation function. The simulation grid, nonlinear load and inverter main circuit are built by the Multisim software. The HIL simulation system is constructed with Single-Board RIO. The simulation results show the unified control of grid connected power and harmonic treatment is implemented.

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开放日期:

 2018-07-01

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