摘要
多直流馈入情况下,需要对电网规划的多个直流落点进行决策。基于直流落点间的等效阻抗和直流额定功率,给出了反映直流在系统内影响力的的权重系数定义。基于多馈入短路比,提出计及直流权重的多直流馈入落点方案评价指标的定义及其计算方法。根据直流间的相互影响因子,给出了纳入评价指标计算的直流的筛选策略。提出了涵盖初选、评估排序、安全稳定校核步骤的直流落点选择方法和流程。该方法体现了多直流相互影响的特点,为电网规划方案多回直流落点的选取提供了快速、直接的计算分析工具。方法应用于华东2020年规划电网,计算得到的规划直流落点方案优劣排序与时域仿真计算结果高度一致,验证了该方法的正确性和有效性。
In the planning of power grid with multi-infeed HVDC transmission system~ it is necessary to decide the terminal locations of HVDC transmission lines. Based on equivalent impedances among HVDC terminal locations and nominal capacities of HVDC transmission lines, the definition of weight coefficient reflecting the impact of HVDC transmission system within the power grid is given. Based on multi-infeed short-circuit ratio the definition of the index to evaluate terminal location schemes for multi-infeed HVDC transmission system, in which the weights of HVDC transmission lines are taken into account, and its computing method are proposed. According to interaction factors among HVDC transmission lines a screening strategy of HVDC transmission lines brought into the weights is put forward, and the technical process for the selection of terminal locations for HVDC transmission lines, which covers primary selection, evaluation and sequencing and validation of security and stability~ is given. The proposed methods incarnate the feature of interaction among multi HVDC transmission lines, and are available for reference to the calculation and analysis of selecting terminal locations of multi-circuit HVDC transmission lines in power grid planning scheme. The proposed methods have been applied to the planning of East China power grid in 2020, and the obtained results of terminal location schemes of HVDC transmission lines for the planning, which are sequenced according to advantages and disadvantages, consist with the results from time-domain simulation remarkably.
出处
《电网技术》
EI
CSCD
北大核心
2013年第12期3336-3341,共6页
Power System Technology
基金
国家电网公司电网重大专项资助项目课题(SGCC-MPLG001-2012)
关键词
多直流馈入
电网规划
多馈入短路比
权重系数
multi-infeed HVDC transmission system
power grid planning
multi-infeed short-current ratio
weightcoefficient
作者简介
周勤勇（1977-），男，硕士，高级工程师，研究方向为电网规划技术，E-mail：qyzhou@epri．sgcc．com．Cn；
刘玉田（1964-），男，教授，博士生导师，主要研究方向为电力系统运行与控制；
汤涌（1959），男，博士，教授级高级工程师，博士生导师，研究方向为电力系统仿真与分析。
