电力系统自动化2017，Vol.41Issue(22)：40-47,8.DOI:10.7500/AEPS20170330005
考虑非对称运行和受端分层接入的特高压直流潮流建模
Power Flow Modeling for Ultra-high Voltage Direct Current Considering Unbalanced Operation and Receiving-end Hierarchical Integration
摘要
Abstract
Different operation modes of the ultra-high voltage direct current (UHVDC) system yield different power constraints and direct current (DC) variables at both converters in power flow modeling,which need to be differentiated.Under the hierarchical integration mode,the inverter connects two alternating current grids with different system parameters and operation conditions,thus the parameters of the converters at the high and low terminals should be set independently.The power flow model of the UHVDC system is proposed.The balanced and unbalanced operation modes are differentiated.Based on the system's symmetry of each operation mode,the independent DC variables are decided and the equivalent power of the converters are found,thus to derive the power flow constraint equation.For the hierarchical integration mode,the operation modes are reclassified by the capacities of the total system and the transmission power to the two receiving-end grids,and the power flow model is proposed.According to the power transfer schemes,the changes of the DC parameters are derived,thus to compare the impacts of them on the grid power flow.The two-region IEEE RTS-96 test system is applied to validate the feasibility and accuracy of the proposed model.关键词
特高压直流/潮流建模/分层接入/非对称运行/独立直流变量/功率转移Key words
ultra-high voltage direct current (UHVDC)/power flow modeling/hierarchical integration/unbalanced operation/independent direct current (DC) variable/power transfer引用本文复制引用
李生虎,吴正阳,黄杰杰,华玉婷..考虑非对称运行和受端分层接入的特高压直流潮流建模[J].电力系统自动化,2017,41(22):40-47,8.基金项目
This work is supported by National Natural Science Foundation of China (No.51637004).国家自然科学基金资助项目(51637004). （No.51637004）
