Massive adoptions of combined heat and power (CHP) units necessitate the coordinated operation of the power system and district heating system (DHS). Exploiting the reconfigurable property of district heating networks (DHNs) provides a potentially cost-effective solution to enhance the flexibility of the power system by readjusting the configuration for heat supply, which has not been addressed in the literature. To address this issue, a unit commitment considering combined electricity and reconfigurable heating network (UC-CERHN) is proposed in this paper to coordinate the day-ahead scheduling of power system and DHS. The DHS is formulated as a nonlinear and mixed-integer model considering the reconfigurable DHN. To make the commitment problem tractable, an auxiliary heat quantity variable is introduced, and the DHS model is reformatted to a linear energy flow model by approximation of heat loss, where the computational burdens are significantly reduced. Extensive case studies are presented to validate the effectiveness and accuracy of the approximated model and illustrate the potential benefits of the proposed method with respect to congestion management and wind power accommodation.

中文翻译：

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重新配置区域供热网络，以增强电力系统单元承诺中的操作灵活性

大规模采用热电联产（CHP）单元需要电力系统和区域供热系统（DHS）的协调运行。利用区域供热网络（DHN）的可重新配置属性，提供了一种潜在的经济有效的解决方案，可通过重新调整供热配置来增强电力系统的灵活性，这在文献中并未涉及。为了解决这个问题，本文提出了一种考虑电力和可重构热网（UC-CERHN）的机组承诺，以协调电力系统和DHS的日前调度。考虑到可重配置的DHN，DHS被公式化为非线性混合整数模型。为了使承诺问题易于处理，引入了一个辅助热量变量，并通过近似热损失将DHS模型重新格式化为线性能量流模型，从而显着减少了计算负担。提出了广泛的案例研究，以验证近似模型的有效性和准确性，并说明了所提出的方法在拥堵管理和风力发电适应性方面的潜在好处。