A Case Study of Wind-PV-Thermal-Bundled AC/DC Power Transmission from a Weak AC Network

[摘要] Wind power generation and photovoltaic (PV) power generation bundled with the support by conventional thermal generation enables the generation controllable and more suitable for being sent over to remote load centre which are beneficial for the stability of weak sending end systems. Meanwhile, HVDC for long-distance power transmission is of many significant technique advantages. Hence the effects of wind-PV-thermal-bundled power transmission by AC/DC on power system have become an actively pursued research subject recently. Firstly, this paper introduces the technical merits and difficulties of wind-photovoltaic-thermal bundled power transmission by AC/DC systems in terms of meeting the requirement of large-scale renewable power transmission. Secondly, a system model which contains a weak wind-PV-thermal-bundled sending end system and a receiving end system in together with a parallel AC/DC interconnection transmission system is established. Finally, the significant impacts of several factors which includes the power transmission ratio between the DC and AC line, the distance between the sending end system and receiving end system, the penetration rate of wind power and the sending end system structure on system stability are studied.

[发布机构] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing, China^1;China Electric Power Research Institute, Beijing, China^2;Sichuan Electric Power Research Institute, Sichuan, China^3

[效力级别] 电工学

[关键词] AC/DC interconnection;Penetration rates;Photovoltaic thermals;Research subjects;System modeling;Technique advantage;Thermal generation;Transmission systems