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### “碳中和”目标下电气互联系统有功-无功协同优化模型

1. 上海电力大学 电气工程学院,上海 200090
• 收稿日期:2021-07-01 出版日期:2021-12-28 发布日期:2021-12-30
• 作者简介:孙 欣(1980-),女,江苏省镇江市人,副教授,主要从事电力市场、综合能源系统优化研究.电话(Tel.): 021-35303874;E-mail: sunxin@shiep.edu.cn.
• 基金资助:
国家自然科学基金(U2066214)

### Coordinated Optimization Model of Active Power and Reactive Power in Power and Gas Systems with the Objective of Carbon Neutrality

SUN Xin(), YAN Jiajia, XIE Jingdong, SUN Bo

1. College of Electrical Engineering, Shanghai University of Electrical Power, Shanghai 200090, China
• Received:2021-07-01 Online:2021-12-28 Published:2021-12-30

Abstract:

With the objective of carbon neutrality, renewable energy resources gradually become the main power supply, whose variability poses great challenges to the operation and optimization of the system, especially to the power distribution network. In order to solve the problem of reactive power caused by high penetration of renewable energy sources, a centralized optimization model is proposed, which takes reactive power optimization and “generation-network-load-storage” multi-energy integration into account. The model aims at optimizing the operating cost and minimizing network losses and carbon emissions of the system. Reactive power compensation, regulation of energy storage, and energy conversion are considered to achieve safe and low-carbon economic dispatch of the power and gas systems. An improved second-order cone relaxation method is used for the convex relaxation of non-linear equality constraints concerned with the distribution network. The switching capacity produced by discrete reactive power compensators can be exactly linearized by the application of the big M approach. The simulation results demonstrate that the proposed method could effectively compensate the reactive power required by the grid-connection point of wind turbine, coordinate the energy interaction between the power and gas, thus improving the stability and elasticity of the distribution network after integration of large-scale renewable energy sources, which helps promote the consumption of renewable energy.