Penetrating power characteristics of half-wavelength AC transmission in point-to-grid system

• 作者: Gehao SHENG Hanqing LIANG Lei WAN Xiuchen JIANG Yadong LIU
• 来源期刊: 现代电力系统与清洁能源学报(英文)
• 学科: 工学
• 关键词: Half-wavelength ALTERNATING current transmission(HWACT) Ultra-high VOLTAGE SYNCHRONOUS POWER grids PENETRATING power(PP)
• 年，卷（期）: 2019,（1）
• 页码范围: 123-130
• 页数: 8页
• 分类号: TM721.2

摘要

With the proposed concept of global energy interconnection, half-wavelength alternating current transmission(HWACT) technology becomes of more interest.HWACT lines can be adopted to establish a pointto-grid system, in which the penetrating power(PP) is produced between receiving terminals, having a significant effect on the power flow distribution.In order to investigate this phenomenon, the PP characteristics of the HWACT system are researched in this paper.First, the mathematical relationship between the transmission power and terminal bus voltages of a single HWACT line is derived using the equations of a distributed parameter model.The research indicates that the relationship between power and terminal voltages shows ‘‘reverse characteristics'opposite to those of regular short transmission lines.Then, the concept and definition of PP in a point-to-grid system with two receiving terminals are proposed, and the corresponding relationship between PP and the terminal bus voltages is derived.Simulations are carried out to validate the theory under different conditions, so that the accuracy and adaptiveness of the theoretical analysis can be proved.In addition, the results demonstrate that selecting the location for a HWACT system has demanding requirements in order to control the value of PP.