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| Energy Sharing Incentive Strategy of Prosumers Considering Conditional Value at Risk and Integrated Demand Response |
| Sun Yi1, Li Fei1,2, Hu Yajie1, Chen Minghao1, Zheng Shunlin1 |
1. School of Electrical and Electronic Engineering North China Electric Power University Beijing 102206 China;
2. State Grid Hebei Electric Power Co. Ltd Shijiazhuang 050000 China |
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Abstract With the wide spread of distributed new energy source and the multiple types of user's energy demand, traditional energy consumers are transforming into prosumers with both power production and consumption capabilities. In order to study the scheme of energy sharing between prosumers in the context of integrated energy, an incentive model for energy sharing between prosumers is designed, which considers the uncertainty risk of distributed new energy output and user electricity consumption and the integrated demand response. The integrated energy service provider (IESP) is the bridge between the energy market and prosumers, and forms a community of interests with multiple prosumers to lead the energy sharing activities between them. In order to promote the energy sharing between prosumers, it must be proved that all participants can benefit from the implementation of the energy sharing scheme. Therefore, the cost model of each participant before and after energy sharing needs to be established separately. Firstly, the basic cost model of integrated energy service provider and prosumers is established, and the conditional value at risk is used to represent the uncertainty risk of prosumers' electricity production and consumption. Secondly, based on the agreed energy sharing trading mechanism, the energy sharing incentive subsidy is used as a variable to establish an energy sharing model, that is, the cost of the community of interests is minimized. Then, the adaptive allocation strategy for shared benefits is designed, and the equivalent value of shared energy by prosumers is used to express their market contribution, so as to calculate the incentive subsidy amount. And based on the Nash game model, it is proved that the proposed energy sharing incentive mechanism has a unique optimal solution, and all participants can benefit from it.
In test 1, by controlling the existence of the two mechanisms of integrated demand response and energy sharing, it was found that integrated demand response could receive better economic benefits than energy sharing, and the combination of the two can further stimulate their respective advantages, reducing the overall cost by 21.63%. And the energy sharing mechanism can reduce the use of energy storage equipment by prosumers. In test 2, it is verified that the net cost savings of prosumers under the adaptive benefit allocation model are positively correlated with their market contribution, which ensures the fairness of market participants. The experiment on the change of risk weight shows that it is necessary to balance the overall economy and risk prevention. Finally, the qualitative analysis of energy trading price shows that the trading price between IESP and prosumers has little impact on the energy sharing strategy, while the energy price interacting with the energy market has obvious impact on the energy sharing strategy. When the power purchase price of IESP rises, the power sharing between prosumers will be more active. When the gas purchase price of IESP rises, the electricity and gas energy sharing between prosumers will be more active. When the price of electricity sold from the IESP increases, the overall sharing level will decline, and the prosumers will be more willing to transfer the surplus electricity to the external grid. Therefore, in the implementation of energy sharing scheme, the price policy of local energy market should be considered, and the integrated demand response can also be used together to fully mobilize the enthusiasm of prosumers.
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Received: 08 November 2021
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2023, Vol. 38 
