Coordinated voltage regulation strategy of OLTC and BESS considering switching delay  

作　　者：徐振宇 HUA Yongzhu CUI Jiadong LI Chuangwei XU Zhenyu;HUA Yongzhu;CUI Jiadong;LI Chuangwei(College of Information Science&Technology,Zhejiang Shuren University,Hangzhou 310015,P.R.China;The College of Electronics and Information,Hangzhou Dianzi University,Hangzhou 310018,P.R.China)

机构地区：[1]College of Information Science&Technology,Zhejiang Shuren University,Hangzhou 310015,P.R.China [2]The College of Electronics and Information,Hangzhou Dianzi University,Hangzhou 310018,P.R.China

出　　处：《High Technology Letters》2024年第2期138-145,共8页高技术通讯（英文版）

基　　金：Supported by the Postdoctoral Science Foundation of China(No.2022M710039)。

摘　　要：When large-scale distributed renewable energy power generation systems are connected to the power grid,the risk of grid voltage fluctuations and exceeding the limit increases greatly.Fortunately,the on-load tap changer(OLTC)can adjust the transformer winding tap to maintain the secondary side voltage within the normal range.However,the inevitable delay in switching transformer taps makes it difficult to respond quickly to voltage fluctuations.Moreover,switching the transformer taps frequently will decrease the service life of OLTC.In order to solve this critical issue,a cooperative voltage regulation strategy applied between the battery energy storage systems(BESSs)and OLTSs.is proposed By adjusting the charge and discharge power of BESSs,the OLTC can frequently switch the transformer taps to achieve rapid voltage regulation.The effectiveness of the proposed coordinated regulation strategy is verified in the IEEE 33 node distribution systems.The simulation results show that the proposed coordinated regulation strategy can stabilize the voltage of the distribution network within a normal range and reduce the frequency of tap switching,as such elongating the service life of the equipment.

关 键 词：distributed power generation voltage regulation distribution network on-load tapcharger(OLTC) battery energy storage system(BESS) 

分 类 号：TM912[电气工程—电力电子与电力传动]