Construction of an example system for AC/DC hybrid power grid with high-proportion renewable energy

• Published in: Journal of engineering (Stevenage, England) England), 2019-03, Vol.2019 (16), p.1117-1121
• Main Authors: Zhao, Dawei, Ma, Jin, Qian, Minhui, Zhu, Lingzhi, Yao, Liangzhong, Ding, Kun, Han, Hualing
• Format: Article
• Language: English
• Subjects: AC/DC hybrid power grid; DIgSILENT PowerFactory software; high-proportion renewable energy; high-voltage direct current transmission; HVDC power transmission; hybrid power systems; installed power generation; load centres; load configuration; load flow; load flow distribution; new-generation synchronous condenser; power grid structure; power grids; power system transient stability; practical renewable energy base; simplified single-machine infinite-bus system; solar power; solar power generations; synchronous generators; The 14th IET International Conference on AC and DC Power Transmission (ACDC 2018); transient stability characteristics; UHVDC project; wind power; wind power generations
• ISSN: 2051-3305; 2051-3305
• DOI: 10.1049/joe.2018.8578

Large-scale wind and solar power generations have got rapid development in recent years in China and abroad. They always connect to load centres through high-voltage direct current (HVDC) transmission or ultra HVDC (UHVDC) transmission lines. Such systems are so large and it is necessary to make appropriate equivalence according to the purpose of different research. At present, the analysis model of this kind of real system is few, and simplified single-machine infinite-bus system or IEEE example system is adopted most of the time, which may affect the accuracy of analysis results. Here, the UHVDC project from a practical renewable energy base to load centres in China is chosen as an example, the actual structure and parameters are used to establish a typical example system for AC/DC hybrid power grid with high-proportion renewable energy. The new-generation synchronous condenser with large capacity and the supporting synchronous generators are all considered. First, the installed power generation, power grid structure, and load configuration of example system are introduced. Then the load flow distribution and transient stability characteristics are analysed by using DIgSILENT PowerFactory software. Finally, the feasibility of the proposed example system is shown by simulation results.