基于模块化多电平换流器的UPQC样机设计研究
发布时间：2018-08-28 06:47
【摘要】：随着我国电力系统的快速发展,现代电力网络也朝着结构日益复杂、负荷容量日益增大的方向发展,随之带来的电能质量问题也越来越受到人们的关注。如何能够更加高效、更加综合解决电能质量问题,已经成为一个亟待解决的问题。统一电能质量控制器(Unified Power Quality Controller, UPQC)作为功能强大的电能质量综合补偿装置,其并联侧具有STATCOM与APF的功能,串联侧具有DVR与DUPS的功能,既可以解耦独立运行实现各自的功能,也可以作为一个整体实现统一的综合功能,更好地解决复合电能质量问题。 首先,对MMC-UPQC样机主电路的拓扑结构及其输出电压原理进行了分析。针对MMC-UPQC低压样机的实际需要,对主电路中关键元器件的参数(包括桥臂电抗、启动充电电阻)进行了详细的计算与研究。通过PSCAD仿真分析了MMC电平数与输出电压性能的关系,并据此确定了MMC电平数。 其次,进行了功率模块主电路参数以及功率模块控制系统两个方面的设计,分别通过空载实验、功率实验以及集成实验对设计的功率模块进行测试,实验结果验证了功率模块设计的正确性。 再次,对MMC-UPQC样机的控制策略进行分析和研究,并以PSCAD/EMTDC为仿真平台,对本文采用的控制策略进行仿真验证,仿真结果验证了控制策略的有效性。 最后,以Lab VIEW软件工具为平台,开发了适用于UPQC样机的人机交互系统；并且详细阐述MMC-UPQC样机的控制系统设计,包括控制系统的总体框架、系统控制层设计、系统的通信方式以及控制策略的软件实现。
[Abstract]:With the rapid development of power system in our country, modern power network is developing towards the direction of complex structure and increasing load capacity, which brings more and more attention to the problem of power quality. How to solve the power quality problem more efficiently and synthetically has become an urgent problem. The unified power quality controller (Unified Power Quality Controller, UPQC) is a powerful power quality compensation device. Its parallel side has the functions of STATCOM and APF, while the series side has the functions of DVR and DUPS. It can also be used as a whole to achieve a unified comprehensive function, better solve the composite power quality problem. Firstly, the topology of the main circuit of MMC-UPQC prototype and the principle of output voltage are analyzed. According to the actual needs of the MMC-UPQC low-voltage prototype, the parameters of the key components in the main circuit, including the reactance of the bridge arm and the starting charge resistance, are calculated and studied in detail. The relationship between MMC level number and output voltage performance is analyzed by PSCAD simulation, and the MMC level number is determined accordingly. Secondly, the main circuit parameters of the power module and the control system of the power module are designed. The power module is tested by the no-load experiment, the power experiment and the integrated experiment, respectively. The experimental results verify the correctness of the power module design. Thirdly, the control strategy of MMC-UPQC prototype is analyzed and studied, and the control strategy adopted in this paper is simulated based on PSCAD/EMTDC. The simulation results verify the effectiveness of the control strategy. Finally, the human-computer interaction system suitable for UPQC prototype is developed on the platform of Lab VIEW software tool, and the design of control system of MMC-UPQC prototype is described in detail, including the overall framework of control system and the design of system control layer. The communication mode of the system and the software implementation of the control strategy.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761
本文编号：2208606
[Abstract]:With the rapid development of power system in our country, modern power network is developing towards the direction of complex structure and increasing load capacity, which brings more and more attention to the problem of power quality. How to solve the power quality problem more efficiently and synthetically has become an urgent problem. The unified power quality controller (Unified Power Quality Controller, UPQC) is a powerful power quality compensation device. Its parallel side has the functions of STATCOM and APF, while the series side has the functions of DVR and DUPS. It can also be used as a whole to achieve a unified comprehensive function, better solve the composite power quality problem. Firstly, the topology of the main circuit of MMC-UPQC prototype and the principle of output voltage are analyzed. According to the actual needs of the MMC-UPQC low-voltage prototype, the parameters of the key components in the main circuit, including the reactance of the bridge arm and the starting charge resistance, are calculated and studied in detail. The relationship between MMC level number and output voltage performance is analyzed by PSCAD simulation, and the MMC level number is determined accordingly. Secondly, the main circuit parameters of the power module and the control system of the power module are designed. The power module is tested by the no-load experiment, the power experiment and the integrated experiment, respectively. The experimental results verify the correctness of the power module design. Thirdly, the control strategy of MMC-UPQC prototype is analyzed and studied, and the control strategy adopted in this paper is simulated based on PSCAD/EMTDC. The simulation results verify the effectiveness of the control strategy. Finally, the human-computer interaction system suitable for UPQC prototype is developed on the platform of Lab VIEW software tool, and the design of control system of MMC-UPQC prototype is described in detail, including the overall framework of control system and the design of system control layer. The communication mode of the system and the software implementation of the control strategy.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761
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