考虑交换功率费用的多区互联电热联合系统协调消纳弃风分析

随着风电并网容量及弃风量的增加,远距离、大容量异地消纳风电已成为降低弃风率的有效策略.针对区域间以特高压直流为主要输送通道的发展格局,建立了区域间直流联络线模型;在考虑各区域电热联合系统信息保密及调度独立性的前提下,基于目标级联分析法,将调度问题分为上级优化主问题和下级优化子问题,并以联络线功率为协调变量,建立了考虑联...

Coordinated abandoned wind accommodation analysis of multi-area interconnected combined heat and power system considering exchanging power cost

With the increase of grid-connected wind power capacity and abandoned wind power, the long-distance and large-capacity wind power trans-area accommodation has become an effective strategy to reduce the abandoned wind rate. In view of the inter-area development pattern taking UHVDC(Ultra High Voltage Direct Current) as the main transmission channel, the inter-area DC tie-line model is established. Then, considering the information confidentiality and dispatching independence of each areal combined heat and power system, the dispatching problem is divided into the upper-level main optimization problem and lower-level sub optimization problem based on analytical target cascading. And taking the tie-line power as the coordinated variable, the decentralized coordinated abandoned wind accommodation dispatching model of multi-area interconnected combined heat and power system considering exchanging power cost of tie-line is established. The influences of electricity price of tie-line, system characteristics of interconnected areas and abandoned wind accommodation measures on the wind power accommodation rate of multi-area interconnected combined heat and power system are analyzed in detail by case simulation. The research shows that considering exchan-ging power cost of tie-line and selecting electricity price of tie-line reasonably, giving priority to being interconnected with the areas with high electric load, low proportion of heat load and thermal power unit, and low penetration of wind power, and taking abandoned wind accommodation measures in the interconnected areas are beneficial to wind power accommodation of areal combined heat and power system in which wind power is rich.