中国电机工程学报2018，Vol.38Issue(9)：2622-2633,12.DOI:10.13334/j.0258-8013.pcsee.172502
柔性直流输电接入弱交流电网时锁相环和电流内环交互作用机理解析研究
Analytical Research on the Mechanism of the Interaction Between PLL and Inner Current Loop When VSC-HVDC Connected to Weak Grid
摘要
Abstract
The analytic transfer function of inner current loop control considering the influence of AC system strength and phased lock loop (PLL) was derived. Then the interaction between PLL and inner current loop was analyzed based on the open loop transfer function G0, and the influence of AC system strength and active power on the interaction was also discussed. Mechanism explanation of the interaction between PLL and inner current loop and influence of AC system strength and active power on the interaction were presented. The mathematical and physical mechanism of the phenomenon that the inner current control is more likely to lose stability when the PLL and inner current control have adjacent bandwidth in weak grid condition are also explained. The theoretical analysis is validated by simulation results.关键词
解析传递函数/锁相环/电流内环/交互作用机理/弱电网Key words
analytic transfer function/phased lock loop/inner current loop/mechanism of interaction/weak grid分类
信息技术与安全科学引用本文复制引用
吴广禄,周孝信,王姗姗,梁军,赵兵,王铁柱,李英彪,杨艳晨..柔性直流输电接入弱交流电网时锁相环和电流内环交互作用机理解析研究[J].中国电机工程学报,2018,38(9):2622-2633,12.基金项目
国家重点研发计划资助项目(2016YFB0900602) （2016YFB0900602）
国家电网公司资助科技项目“大规模新能源柔直电网无源送出系统协调控制理论与控制方法研究”.Project Supported by the National Key R＆D Program of China (2016YFB0900602) （2016YFB0900602）
The Science and Technology Projects Supported by SGCC (Coordination Control Theories and Control Methods for Integration of Large Scale Stand-alone Renewable Generation via VSC DC grid). （Coordination Control Theories and Control Methods for Integration of Large Scale Stand-alone Renewable Generation via VSC DC grid）
