MMC-HVDC物理动态模拟仿真系统设计
发布时间：2018-09-17 07:23
【摘要】：近年来,基于模块化多电平换流器(Modular Multilevel Converter,MMC)的高压直流输电(High Voltage Direct Current,HVDC)因其输出波形谐波含量低、响应速度快和模块化水平高等优势,在大规模可再生能源并网以及孤岛供电等领域得到广泛关注与应用。为了保证MMC-HVDC系统各个元件参数和设计的控制策略的可行性与有效性,需要进行不同工况下的各种试验。由于其控制系统复杂、换流器含有大量电力电子器件,采用数字仿真无法反映其动态特性。通过物理动态仿真能够对换流器控制系统的性能进行仿真测试,详细反映各种运行状态下换流器中功率器件、电容器、桥臂电抗器的动态特性。本文对物理动态仿真系统的等效原则、系统构建方法、硬件电路设计及相关控制策略开展研究。分析了MMC换流器的基本工作原理,对换流器拓扑结构、动态数学模型和解耦控制方法进行了研究,并对其运行控制和换流器调制方法进行了分析,包括预充电控制策略、最近电平逼近调制策略和子模块电容均压控制策略,为物理动态仿真系统构建提供基础。开展MMC-HVDC物理动态模拟仿真系统设计,构建了物理动态仿真系统的总体构架,包括一次系统的总体设计和控制系统架构的设计;对模拟换流阀子模块等效方法和元器件选择方法进行了设计,并设计了子模块和控制器硬件电路;对系统的部分控制软件进行了设计,提出了提高系统控制器性能的三相锁相环控制算法,提出了基于FPGA通信的提高数据传输效率的控制板间数据传输方法。在所建立的MMC-HVDC物理动态模拟仿真系统上开展了系统的调试工作。通过对内环电流PI参数整定和优化,提高了内环控制器的响应速度和稳定性;通过定无功功率控制和定直流电压控制实验,验证各级控制器控制策略、层间通信协议的正确性;对正常工况进行仿真测试,检验了物理动态仿真系统的性能。
[Abstract]:In recent years, the high voltage direct current transmission (High Voltage Direct Current,HVDC) based on modularized multilevel converter (Modular Multilevel Converter,MMC) has the advantages of low harmonic output waveform, fast response speed and high modularization level. It has been widely paid attention to and applied in the field of large-scale renewable energy grid and island power supply. In order to ensure the feasibility and effectiveness of each component parameter and designed control strategy of MMC-HVDC system, all kinds of tests under different working conditions are needed. Because of the complexity of the control system and the large number of power electronic devices in the converter, the dynamic characteristics of the converter can not be reflected by digital simulation. Through physical dynamic simulation, the performance of converter control system can be simulated and tested, and the dynamic characteristics of power device, capacitor and bridge arm reactor in various operating states can be reflected in detail. In this paper, the equivalent principle, system construction method, hardware circuit design and related control strategy of the physical dynamic simulation system are studied. The basic working principle of MMC converter is analyzed, the topology structure, dynamic mathematical model and decoupling control method of converter are studied, and the operation control and modulation method of converter are analyzed, including precharge control strategy. The nearest level approach modulation strategy and the capacitor voltage sharing control strategy of the sub-module provide the foundation for the construction of the physical dynamic simulation system. The design of MMC-HVDC physical dynamic simulation system is carried out, and the overall framework of the physical dynamic simulation system is constructed, including the general design of the primary system and the design of the control system architecture. The equivalent method of analog converter valve sub-module and the selection method of components are designed, and the hardware circuit of sub-module and controller is designed, and the part of control software of the system is designed. A three-phase phase-locked loop control algorithm is proposed to improve the performance of the system controller, and a method to improve the efficiency of data transmission between control boards based on FPGA communication is proposed. The debugging work of the system is carried out on the established MMC-HVDC physical dynamic simulation system. The response speed and stability of the inner loop controller are improved by optimizing the PI parameters of the inner loop current, and the correctness of the control strategy and the inter-layer communication protocol are verified by the experiments of constant reactive power control and constant DC voltage control. The performance of the physical dynamic simulation system is tested by simulation test under normal working conditions.
【学位授予单位】：东北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM721.1;TM743
本文编号：2245150
[Abstract]:In recent years, the high voltage direct current transmission (High Voltage Direct Current,HVDC) based on modularized multilevel converter (Modular Multilevel Converter,MMC) has the advantages of low harmonic output waveform, fast response speed and high modularization level. It has been widely paid attention to and applied in the field of large-scale renewable energy grid and island power supply. In order to ensure the feasibility and effectiveness of each component parameter and designed control strategy of MMC-HVDC system, all kinds of tests under different working conditions are needed. Because of the complexity of the control system and the large number of power electronic devices in the converter, the dynamic characteristics of the converter can not be reflected by digital simulation. Through physical dynamic simulation, the performance of converter control system can be simulated and tested, and the dynamic characteristics of power device, capacitor and bridge arm reactor in various operating states can be reflected in detail. In this paper, the equivalent principle, system construction method, hardware circuit design and related control strategy of the physical dynamic simulation system are studied. The basic working principle of MMC converter is analyzed, the topology structure, dynamic mathematical model and decoupling control method of converter are studied, and the operation control and modulation method of converter are analyzed, including precharge control strategy. The nearest level approach modulation strategy and the capacitor voltage sharing control strategy of the sub-module provide the foundation for the construction of the physical dynamic simulation system. The design of MMC-HVDC physical dynamic simulation system is carried out, and the overall framework of the physical dynamic simulation system is constructed, including the general design of the primary system and the design of the control system architecture. The equivalent method of analog converter valve sub-module and the selection method of components are designed, and the hardware circuit of sub-module and controller is designed, and the part of control software of the system is designed. A three-phase phase-locked loop control algorithm is proposed to improve the performance of the system controller, and a method to improve the efficiency of data transmission between control boards based on FPGA communication is proposed. The debugging work of the system is carried out on the established MMC-HVDC physical dynamic simulation system. The response speed and stability of the inner loop controller are improved by optimizing the PI parameters of the inner loop current, and the correctness of the control strategy and the inter-layer communication protocol are verified by the experiments of constant reactive power control and constant DC voltage control. The performance of the physical dynamic simulation system is tested by simulation test under normal working conditions.
【学位授予单位】：东北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM721.1;TM743
【参考文献】
相关期刊论文 前10条
1 李翠萍;余芳芳;李军徽;丛海洋;;基于MMC的多端高压直流输电系统研究综述[J];现代电力;2017年01期
2 曲平;李耀华;高范强;夏冰;黄仁乐;王存平;;参考波为梯形波的模块化多电平变流器模块电容电压均压策略[J];高电压技术;2017年01期
3 罗文清;劳雪婷;吕玉波;刘畅;;基于DSP Builder三相锁相环的设计[J];科技资讯;2016年07期
4 邓明锋;王康;郭晓君;郑凌娟;;厦门±320kV柔性直流输电示范工程关键技术[J];电力与能源;2016年03期
5 孙银锋;吴学光;李国庆;刘栋;翟雪冰;林畅;;基于等时间常数的模块化多电平换流器柔直换流阀动模系统设计[J];中国电机工程学报;2016年09期
6 张冀川;徐家斌;童亦斌;荆龙;;基于RT-LAB的MMC半实物仿真平台设计[J];电力电子技术;2016年03期
7 赵海伟;秦海鸿;马策宇;朱梓悦;;基于MMC拓扑STATCOM综合控制策略研究[J];电气自动化;2016年01期
8 杨柳;黎小林;许树楷;李岩;刘涛;赵晓斌;陈名;;南澳多端柔性直流输电示范工程系统集成设计方案[J];南方电网技术;2015年01期
9 汪谦;宋强;许树楷;饶宏;刘文华;;基于RT-LAB的MMC换流器HVDC输电系统实时仿真[J];高压电器;2015年01期
10 辛业春;王朝斌;李国庆;吴学光;;模块化多电平换流器子模块电容电压平衡改进控制方法[J];电网技术;2014年05期
相关博士学位论文 前1条
1 张宝顺;MMC型柔性直流输电系统控制策略与物理模拟系统研究[D];华北电力大学;2015年
相关硕士学位论文 前2条
1 季舒平;上海南汇柔性直流输电示范工程关键技术研究[D];上海交通大学;2013年
2 王晓鹏;模块组合多电平变换器控制系统研制[D];北京交通大学;2011年
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