摘要
构建风-储-海水淡化直流微网,将高耗能的海水淡化产业与风电联产运行具有良好发展前景。在分析各功率单元运行控制基础上,提出联网、孤网两种运行模式下系统的功率协调控制策略,利用海水淡化负荷可调节的特性配合蓄电池稳定系统直流电压。联网模式下交流主网作为稳压单元,海水淡化运行在满负荷状态;孤网模式下海水淡化负荷作为可调负荷,采用变频、投切控制实时跟踪风功率变化,与蓄电池配合协调系统的功率交换,在维持系统直流电压稳定的同时减少蓄电池充放电功率。通过对风-储-海水淡化直流微网的仿真分析,验证了所提功率协调控制策略对直流微网控制的有效性。
The joint operation of energy-intensive desalination industry and wind power has a bright development prospect through building a DC microgrid with wind power,energy storage system and desalination.Based on the analysis of the operation and control of each power unit,power coordinated control strategies are proposed in grid-connected and isolated operation modes,and the adjustable characteristics of desalination load are used to stabilize the DC voltage of the system in coordination with batteries:in the grid-connected mode,AC grid functions as a voltage-stability unit,and desalination load operates at full capacity;in the isolated mode,desalination load functions as adjustable load to track the fluctuation of wind power using frequency conversion and cut-in/out control in real time.Moreover,by adjusting the power exchange of the system,the cooperation of adjustable desalination load and batteries can stabilize the DC voltage of the system while reducing the charge/discharge power of batteries.A simulation model of DC microgrid with wind power,energy storage system and desalination is built,and simulation results validate the effectiveness of the proposed power coordinated control strategy for DC microgrid.
作者
徐岩
黄馗
张祥宇
XU Yan;HUANG Kui;ZHANG Xiangyu(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Baoding 071003,China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2018年第3期17-24,共8页
Proceedings of the CSU-EPSA
基金
国家自然科学基金资助项目(51507065)
中央高校基本科研业务费专项资金资助项目(2014MS97)
关键词
海水淡化
可调负荷
蓄电池
直流微网
功率协调控制
desalination
adjustable load
battery
DC microgrid
power coordinated control
