Day-ahead Optimal Dispatch of New Power System Based on Evolving Virtual Net Load

XIAO Bai; YU Haiyang; JIAO Mingxi; WANG Daliang; ZHANG Dachi; YAO Di; XIN Haokuo

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Electric Power Construction ›› 2025

Day-ahead Optimal Dispatch of New Power System Based on Evolving Virtual Net Load

XIAO Bai¹, YU Haiyang¹, JIAO Mingxi², WANG Daliang², ZHANG Dachi³, YAO Di³, XIN Haokuo³

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Abstract

[Objective] Aiming at the adverse effects of source-load uncertainty in the new power system on the formulation of scheduling plans and the consumption of renewable energy power in full-guaranteed acquisition, this paper introduces a day-ahead optimal dispatch method that is founded on the concept of evolving virtual net load. [Methods] Firstly, the Informer model is used to generate the time series of wind power and load. Then, the evolution virtual net load is defined on the basis of the virtual net load, and the evolution virtual net load in the power system is calculated. Finally, considering the operating characteristics of the system, based on the guaranteed acquisition of renewable energy power, with the goal of minimizing the total system cost including the operating cost and carbon emission cost of each unit, the system flexibility constraint condition is used to reflect the demand of source-load uncertainty, and a new day-ahead optimal scheduling model of power system based on evolutionary virtual net load is established. [Results] The actual example analysis shows that compared with other scheduling models, the proposed method can effectively improve the system's ability to cope with source-load uncertainty fluctuations, reduce carbon emission costs and promote the consumption of on-grid electricity for renewable energy power generation projects. [Conclusions] The proposed method can balance the policy requirements and the economic needs of enterprises by taking into account both the guaranteed purchase of renewable energy online electricity and the market-oriented bidding incentives. While ensuring the safe operation of the system, the dual improvement of economy and low carbon can be achieved by optimizing the power generation cost and carbon income of the unit.

Key words

new power system / full security acquisition of renewable energy power / Informer / evolving virtual net load / day-ahead optimal dispatching / source-load uncertainty / flexibility

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XIAO Bai, YU Haiyang, JIAO Mingxi, WANG Daliang, ZHANG Dachi, YAO Di, XIN Haokuo. Day-ahead Optimal Dispatch of New Power System Based on Evolving Virtual Net Load[J]. Electric Power Construction. 2025

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