电网技术2016，Vol.40Issue(4)：1005-1011,7.DOI:10.13335/j.1000-3673.pst.2016.04.004
特高压直流分层接入下混联系统无功电压耦合特性分析
Analysis on Reactive Power and VoltageCoupling Characteristics of Hybrid System for UHVDC Hierarchical Connection to AC Grid
摘要
Abstract
In order to solve problem of voltage support abilityanddifficultyof guiding power flow brought by multi-infeed DC, a new pattern called UHVDChierarchical connection(HC) to AC grid was put forward by Chinese researchers firstly.Electriccoupling relationship of hybrid system became more complex under this mode.Itsinteraction mechanismof reactive power and voltage wasurgently in need ofresearch. Firstly,equivalentmodel ofhybrid system was establishedbased on anactualUHVDCHC project.Then interaction mechanismof reactive power and voltage was analyzed by taking both improvedHCinteractionfactorand coupling relationship between high-endand low-end converters into consideration.Finally, couplingcharacteristics influenced by interactions of AC and DC sideswere verified and perfected withsteady and dynamictime-domain simulationsusing equivalent modelin PSCAD, and a method was presented to judge possibility of commutationfailureof both high-endand low-end inverters.关键词
特高压直流/分层接入/无功电压/耦合特性/换相失败Key words
UHVDC/hierarchical connection/reactive power and voltage/coupling characteristics/commutation failure分类
信息技术与安全科学引用本文复制引用
汤奕,陈斌,王琦,宁佳..特高压直流分层接入下混联系统无功电压耦合特性分析[J].电网技术,2016,40(4):1005-1011,7.基金项目
国家自然科学基金项目(51577030)；国家电网公司项目(XT71-15-045)；江苏省电力公司科技项目(5210EF14001P)。Project Supported by National Natural Science Foundation of China (51577030) （51577030）
Project Supported by State Grid Corporation of China (XT71-15-045) （XT71-15-045）
