配电网智能型直流电源系统设计及其弱磁控制研究
2021-11-02刘石生
刘石生



摘 要:智能配电网电力系统的安全、稳定运行需要直流电源系统为其提供保证,文章结合现阶段智能电网中直流电源系统的发展要求,明确智能型系统的智能化体现及其工作原理,并在此基础上分析系统组成,进行蓄电池、智能监控及高频开关电源的设计,确定蓄电池并联方案,集成数据采集、网络通信与远程监控分析功能于智能监控之中,将高频开关电源用于系统充、放电模块主电路,并进一步执行对系统的弱磁控制任务。经测试,系统AC/DC转换器功率因数为98.58%,交流侧电流谐波含量4.25%,且电压目标值稳定,符合系统设计要求。另外,以单电流为基础的系统弱磁控制能够将电源供电质量优化,保证电压利用率,将电机损耗降低。
关键词:配电网;智能型直流电源系统;智能监控;高频开关电源;弱磁控制
中图分类号:TM63 文献标识码:A 文章编号:1001-5922(2021)10-0160-06
Design of Intelligent DC Power Supply System in Distribution Network and Its Field Weakening Control
Liu Shisheng
(Foshan Power Supply Bureau of Guangdong Power Grid Corporation, Foshan 528000, China)
Abstract:DC power system can provide security for power distribution network electrical power systems secure and stable operation. Combining with the development requirements of power distribution network intelligent DC power system, the paper points out intelligent systems intelligent embodiment and its operating principle, and on this basis, it analyzes the systems constitution, and designs its accumulator, intelligent monitoring and high frequency switching power supply, it points out accumulatorsparallel scheme, and makes an integration of data collection, network communication and remote monitoring analysis in intelligent monitoring. The high frequency switching power supply is used in systems charge and discharge module main circuit, and further performs the task of weakening the field control of the system. By testing, the systems AC/DC transverters power factor is 98.58%, AC side current harmonic content is 4.25%, and voltage-target value is stable, which meets the system design requirements. In addition, in the system based on single current, this control can optimize the power supply quality, ensure the utilization of voltage, and reduce the motor loss.
Key words:power distribution network; intelligent DC power system; intelligent monitoring; high frequency switching power supply; field weakening control
0 引言
近年來,配电网技术发展表现出自愈、兼容、集成以及优化等[1]很多新特点,在电力市场深化变革的背景下,配电网必须将自身的自动化与信息化水平提高,发展智能配电网[2]是其大势所趋。为了与智能配电网所需相适应,变电站研发与引进一系列智能化的设备,可自动、高效实现各项基本功能,包括信息采集、测量、监测以及控制等,同时,亦能与实际所需相结合为高级功能提供支持,如配电网实时控制、智能化调节、在线分析与决策等。然而,智能配电网的核心在于大幅度提高电力系统自动化及其智能化水平[3]。……
