中国电力2025，Vol.58Issue(3)：132-141,10.DOI:10.11930/j.issn.1004-9649.202311097
频率偏差与电压刚度约束下多馈入直流优化调度方法
Optimal Scheduling Method for Multi-infeed Receiving-End Power Grids Under Frequency Deviation and Voltage Stiffness Constraints
摘要
Abstract
The ultra high voltage direct current(UHVDC)transmission system based on line commutation converters(LCCs)is the main technical means for long-distance and high-capacity transmission.To avoid DC power reduction events caused by insufficient system stability margin,an optimal scheduling method for multi-infeed receiving-end power grids considering stability constraints is proposed.Firstly,based on the primary frequency regulation model,the frequency stability constraint for the system's maximum DC transmission power is derived.Secondly,a voltage stiffness index is proposed to evaluate the recovery characteristics of the HVDC commutation failures,and based on this index,the voltage stability constraint is established.Then,considering the frequency and voltage stability constraints as well as various operational constraints,an optimal scheduling model is established for the multi-infeed receiving-end power grids.Finally,the effectiveness of the proposed method is verified through testing on a modified IEEE 39-bus system.The results show that the proposed method can meet the system frequency and voltage stability requirements by changing the unit commitment and DC power,thus avoiding the safety and stability risks caused by strong DC and weak AC.关键词
多直流馈入受端电网/频率稳定约束/电压稳定约束/优化调度/电网换相换流器Key words
multi-infeed receiving-end power grid/frequency stability constraint/voltage stability constraint/optimal scheduling/line commutation converters引用本文复制引用
沈舒仪,王国腾,但扬清,孙飞飞,黄莹,徐政..频率偏差与电压刚度约束下多馈入直流优化调度方法[J].中国电力,2025,58(3):132-141,10.基金项目
国网浙江省电力有限公司科技项目(计及送受端电网安全经济绿色约束的多馈入直流多时间尺度送受电曲线优化研究,5211JY230009). This work is supported by Science and Technology Project of State Grid Zhejiang Electric Power Co.,Ltd.(Research on Optimiz-ation of Multi-time Scale Transmission and Receiving Curve of Multi-infeed HVDC Systems Considering the Safety,Economy,and Green Constraints of the Sending-End and Receiving-End Power Grids,No.5211JY230009). （计及送受端电网安全经济绿色约束的多馈入直流多时间尺度送受电曲线优化研究,5211JY230009）
