配电网智能型直流电源系统设计及其弱磁控制研究

Design of Intelligent DC Power Supply System in Distribution Network and Its Field Weakening Control

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。

DC power system can provide security for power distribution network electrical power system’s secure and stable operation.Combining with the development requirements of power distribution network intelligent DC power system,the paper points out intelligent system’s intelligent embodiment and its operating principle,and on this basis,it analyzes the system’s constitution,and designs its accumulator,intelligent monitoring and high frequency switching power supply,it points out accumulators’parallel 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 system’s charge and discharge module main circuit,and further performs the task of weakening the field control of the system.By testing,the system’s AC/DC transverter’s 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.