摘要
基于模块化的高频隔离功率变换系统为基础,搭建了含有光储系统和工频负载的直流配电系统实验模型。设计了实验模型的3种运行模式,并通过对系统电压、功率关系及各并网接口模块工作特性的分析,提出一种以直流母线电压为主要控制量的分层逻辑控制系统。分层逻辑控制系统分为数据采集、模式识别、逻辑组合和指令执行4个控制层,各层间无需互联通信,通过各并网接口模块所离散出的12个子控制器,以就地控制方式保证系统功率平衡、电压稳定及各接口模块间的协调配合。最后通过Matlab/Simulink仿真实验,验证了所提出的控制策略在直流配电系统运行控制中的正确性和有效性。
Based on modularized high frequency isolation power conversion system, an experimental model of DC distribution system with photovoltaic, energy storage system and AC loads is built. Three system operation modes are designed and a hierarchical logic control system with the main control variable of DC bus voltage is proposed through analyzing system P-V relationships and operating characteristics of various network interface modules. The hierarchical logic control system is divided into 4 control layers, including data acquisition, pattern recognition, logic combination and instruction execution. Between the layers, it takes a way of local control to ensure the system power balance, voltage stability and coordination between various interface modules through the discrete out of 12 sub-controllers without internet communication. Finally, Matlab/Simulink experiments are conducted to verify the validity and effectiveness of the proposed control strategy in DC distribution system operation and control.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2017年第12期74-81,共8页
Power System Protection and Control
基金
国家电网公司科技发展计划项目([2015]90号
[2015]457号)~~
关键词
直流配网
高频隔离
功率变换系统
直流母线电压
分层逻辑控制
电压平衡控制
DC distribution
high frequency isolation
power conversion system
DC bus voltage
hierarchical logic control
voltage balance control
