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Renewable energy development and multi-energy complementation, taking Qinghai as an example |
| JIN Yong1,3, MA Jiming1, ZHU Shouzhen2, LI Nan2,4 |
1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China;
2. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;
3. Powerchina Resources LTD, Beijing 100048, China;
4. Energy Research Institute of China Huaneng Group, Beijing 100031, China |
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Abstract Actively developing renewable energy sources is one important way to achieve the carbon peak and neutrality targets in China. This paper summarizes the power installed capacities of various power generation methods in China in 2020 and compares the electricity green capabilities in China and the world. This paper then describes a method to analyze the peak shaving capacity of cascade reservoirs, presents a way to integrate multiple power sources, and uses simulations of cascade hydropower stations in the upper reaches of the Yellow River to predict the monthly peak shaving capability of hydropower and other energy sources for the power grid of Qinghai Province for the target year of 2030. The monthly load balance analysis shows that wind power and photovoltaic power generation will lead to more excess, wasted electricity generation in wet years, with full use of the generated power in normal and dry years. The hourly analysis of the multiple power sources during a typical day shows that wind power and photovoltaic power production increases the peak-valley difference of the electrical loads and lead to more excess electricity that is wasted, while in winters of dry years, the electrical production and peak shaving capacity are insufficient and lead to power outsourcing which results in the abandoning of wind and photovoltaic power sources. Thus, the Qinghai power grid needs to promote the construction of power storage systems and renewable power sources. Qinghai also needs to enlarge their baseload capacity and peak shaving capacity to reduce waste and power outsourcing. The simulation method to analyze power shaving capacities of cascade reservoirs and integrating multiple energy sources may be used in other power grids and the conclusions provide a reference for developing the Qinghai electrical system.
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| Keywords
hydropower peak shaving
multi-energy complementation
wind power
photovoltage
pumped storage
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Just Accepted Date: 29 March 2022
Online First Date: 29 March 2022
Issue Date: 29 March 2022
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2022,
Vol. 62
