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| Frequency-constrained unit commitment model based on linear AC power flow |
| DOI：10.19783/j.cnki.pspc.250717 |
| Key Words:renewable energy second-order cone relaxation frequency-constrained unit commitment two stage progressive optimization |
| Author Name | Affiliation | | SUN Kang | 1. School of Electrical and Power Engineering, Hohai University, Nanjing 211100, China
2. Electric Power Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
3. State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210000, China | | LI Yaran | 1. School of Electrical and Power Engineering, Hohai University, Nanjing 211100, China
2. Electric Power Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
3. State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210000, China | | LI Qun | 1. School of Electrical and Power Engineering, Hohai University, Nanjing 211100, China
2. Electric Power Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
3. State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210000, China | | ZHANG Ningyu | 1. School of Electrical and Power Engineering, Hohai University, Nanjing 211100, China
2. Electric Power Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
3. State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210000, China | | SUN Guoqiang | 1. School of Electrical and Power Engineering, Hohai University, Nanjing 211100, China
2. Electric Power Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
3. State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210000, China | | WANG Qihui | 1. School of Electrical and Power Engineering, Hohai University, Nanjing 211100, China
2. Electric Power Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
3. State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210000, China | | WEI Zhinong | 1. School of Electrical and Power Engineering, Hohai University, Nanjing 211100, China
2. Electric Power Research Institute of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
3. State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210000, China |
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| Abstract:The large-scale integration of renewable energy into power grids has led to a significant reduction in power system rotational inertia. To ensure system frequency security, a frequency-constrained unit commitment model based on linear AC power flow is proposed. First, a unit commitment model based on mixed integer second-order cone relaxation is developed. The AC power flow model is combined with the unit commitment model to establish a unit commitment model that can accurately characterize power flow distribution within the network. Second, to ensure the security and stability of the system frequency, frequency-related constraints are incorporated into the model, and a frequency-constrained unit commitment model based on mixed-integer second-order cone relaxation is constructed. Finally, a two-stage progressive optimization strategy is proposed to improve the accuracy of the solution by collaboratively solving the frequency-constrained unit commitment model and the multi-period optimal power flow problem. The effectiveness of the proposed model is verified using a modified IEEE 118-bus system. |
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