单相光伏大量接入的三相不平衡配电网无功优化  

Three-phase Unbalanced Reactive Power Optimization for Distribution Systems with a Large Number of Single Phase Solar Generators

作　　者：赵晋泉[1,2] 刘绪[1,2] 林昌年 魏文辉 

机构地区：[1]河海大学可再生能源发电技术教育部工程研究中心,江苏省南京市210098 [2]河海大学能源与电气学院,江苏省南京市210098 [3]北京科东电力控制系统有限责任公司,北京市110179

出　　处：《电力系统自动化》2016年第13期13-18,70,共7页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(51577049);高等学校博士学科点专项科研基金资助项目(20120094110008);国家电网公司科技项目"面向分布式电源接入的主配网一体化分析及快速仿真关键技术研究"~~

摘　　要：随着光伏发电等大量非全相运行的分布式电源(DG)接入,配电网固有的三相不平衡特征更加突出,传统无功优化方法因忽略了三相不平衡导致效果较差。文中提出一种三相不平衡主动配电网的无功优化模型,以系统负序电压最小和网络损耗最小为目标,考虑有载调压变压器、分组投切电容器、静止无功补偿装置等离散和连续控制变量,形成一个带有二次约束的混合整数二次规划问题。利用分支定界法处理该混合整数规划问题,将原问题松弛为多个不含离散变量的子问题,分别求得各子问题中设备的控制量,进而求得原问题的最优解。采用扩展的IEEE 33节点三相测试系统仿真计算,验证了所述模型和方法的有效性。The extensive penetration of open-phase running distributed generators （DGs） such as photovoltaic generators to distribution systems may lead to a serious three-phase unbalanced condition, which is an intrinsic characteristic of distribution systems. The effect of the traditional reactive power optimization method is poor without considering the unbalanced problem. A three phase unbalanced reactive power optimization model for active distribution networks is presented. The model with the objective of minimizing both the negative sequence system voltages and network losses considers continuous and discrete variables e.g. the under-load tap changers, capacitors banks and static var compensator. The reactive power optimization problem is formulated in rectangular coordinates as a mixed-integer quadratic programming with the quadratic constraint problem. It is solved by the branch-and-bound method and the original problem is divided into a lot of sub-problems without discrete variables, which are solved to get the control strategy of devices. The simulation results of the modified IEEE 33-bus three-phase test system show that the proposed model and method are effective.

关 键 词：光伏发电 主动配电网 无功优化 三相不平衡 静止无功补偿装置 分支定界法 

分 类 号：TM761.12[电气工程—电力系统及自动化]