特高压直流分层接入电网的落点选择研究

特高压直流分层接入交流电网不同电压等级的运行方式,为缓解大容量直流接入受端电网后的潮流疏散问题提供了有效手段。直流落点选择是一个多目标决策问题,考虑到直流分层接入电网的特点及影响,建立了直流分层接入电网的综合评价指标,在此基础上利用逼近理想解排序法(TOPSIS法)建立了对应的直流分层接入落点选择策略。以实际电网中特高压直流分层接入为例,采用所提方法评价了不同的直流分层接入方案,验证了方法的有效性,所提方法可方便地应用于对实际规划电网中直流分层接入落点方案的选择。

Terminal Location Selection Study for UHVDC Hierarchical Connection to Power Grid

Ultra-high voltage direct current (UHVDC) system hierarchical connection mode,in which the UHVDC inverter station connects to different voltage level AC system,provides an effective means to evacuate the high-capacity power of UHVDC access to the load center.DC terminal location selection is a multi-objective decision problem.Considering the characteristics and influence of UHVDC hierarchical connection to power grid,the comprehensive evaluation indexes are established,on the basis of which DC terminal location selection strategy by the use of technique for order preference by similarity to ideal solution (TOPSIS) method.Finally,an actual project of UHVDC hierarchical connection to system is taken for an example and four different UHVDC hierarchical connection schemes are discussed.The result shows that effective decision support for UHVDC hierarchical terminal location planning can be provided with the proposed method.