Optimal Allocation of Wind and Solar Capacity in Regional Power Grids Considering Hydropower Regulation Capability Under Electricity-Carbon Coupling Environment

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ZHAO Yishen^1,2, ZHONG Hao^1,2, DU Tao^1,2, LI Xun^1,2, WANG Zhen^1,2, OUYANG Zhenhui^1,2

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Abstract

[Objective] In view of the problems of limited access to the Internet, low return on investment and lack of incentive mechanism in the carbon market in the current large-scale wind power and photovoltaic power station investment. In this paper, a bi-level optimal configuration model of wind and solar capacity of regional power grid considering hydropower regulation ability is constructed under the environment of electric carbon coupling. [Methods] The upper model takes the maximum return on investment of wind power and photovoltaic as the optimization goal, and formulates the configuration strategy of wind and photovoltaic capacity on the basis of comprehensive consideration of the benefits of electricity market and carbon market. In the lower model, the renewable energy group composed of small hydropower, wind power and photovoltaic participates in the clearing of the electricity market with the goal of minimizing the cost of purchasing electricity. At the same time, considering the carbon trading results of wind and solar in the China certified emission reduction (CCER) market, the joint optimization clearing of the electricity and carbon markets is realized. The model introduces cooperative game and Shapley value to quantify the respective benefits of wind, solar and water, and uses the improved particle swarm optimization (IPSO) nested CPLEX solver to realize the collaborative solution of the two-layer structure. [Results] The simulation results show that under different typical scenarios, the income of the scenery varies with the change of the hydropower regulation capacity. The income is the largest in the wet season, and the dry season is reduced accordingly, which in turn affects the optimal configuration of the scenery throughout the year. After the introduction of the electricity-carbon coupling market model, the revenue of the wind-solar system is significantly improved, and the configuration capacity is about 24% higher than that of the traditional electricity market model. The carbon market mechanism effectively inhibits the operation behavior of high-carbon emission units through price signals and promotes the optimization of carbon emission structure of thermal power units. The CCER market friction factor has a significant weakening effect on carbon returns, and the return can be reduced by up to 33.5%. [Conclusions] The model highlights the key role of hydropower regulation capacity and carbon market signal in wind and solar consumption, which is helpful for new energy development and low carbonization of power structure, and provides a theoretical basis for the optimization of carbon market policy.

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ZHAO Yishen, ZHONG Hao, DU Tao, LI Xun, WANG Zhen, OUYANG Zhenhui. Optimal Allocation of Wind and Solar Capacity in Regional Power Grids Considering Hydropower Regulation Capability Under Electricity-Carbon Coupling Environment[J]. Electric Power Construction. 0

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