应用于含分布式电源配电网的D-STATCOM改进型控制策略研究  

An improved D-STATCOM control strategy for distribution networks with distributed generation

作　　者：韩霞[1] 曹琼 Han Xia;Cao Qiong(Marketing Department,State Grid Shanxi Electric Power Company,Taiyuan 030012,China)

机构地区：[1]国网山西省电力公司营销部,太原030012

出　　处：《电测与仪表》2018年第14期106-112,共7页Electrical Measurement & Instrumentation

摘　　要：D-STATCOM能够有效解决当前配电网由于分布式电源以及其他类型电力电子负荷的广泛接入导致的电能质量恶化问题,为了进一步提高D-STATCOM动态响应能力和补偿效果,有必要对其控制策略进行针对性的改进。首先以D-STATCOM的并网点网侧电流、直流母线电压作为状态变量,建立了三相四线制D-STATCOM在静止坐标系下的数学模型。然后,针对含分布式电源配电网的电能质量的特殊性:功率波动频繁、不平衡、非线性等,直接在静止坐标系下采用该文提出的三相四线制D-STATCOM改进型控制策略进行电流环控制器的设计,改进后的三相四线制D-STATCOM具有动态响应时间短、稳态精度高、计算量小的特点。最后通过仿真验证了所提控制策略的可行性。At present,the deterioration of power quality caused by the access of distributed power sources and other types of power electronic load in distribution network is serious,and D-STATCOM can effectively solve it.In order to further improve the dynamic response ability and compensation effect of D-STATCOM,it is necessary to improve its control strategy.Firstly,the mathematical model of the three-phase four-wire D-STATCOM in the stationary phase of the coordinate system is established by taking the grid side current and the DC bus voltage of D-STATCOM as the state variables.Then,according to the particularity of distribution network with distributed generation power quality,such as power fluctuation,unbalanced and nonlinear.The improved control strategy proposed in this paper is used to design the current loop controller under static coordinate system,and the improved three-phase four-wire D-STATCOM has the characteristics of short dynamic response time,high steady-state accuracy and small amount of calculation.Finally,the feasibility of the proposed control strategy is verified by simulation experiments.

关 键 词：D-STATCOM 电能质量 比例积分 二阶广义积分器 重复控制 内模原理 

分 类 号：TM933[电气工程—电力电子与电力传动]