The development of regional integrated electric-thermal energy systems(RIETES) is considered a promising direction for modern energy supply systems. These systems provide a significant potential to enhance the compreh...The development of regional integrated electric-thermal energy systems(RIETES) is considered a promising direction for modern energy supply systems. These systems provide a significant potential to enhance the comprehensive utilization and efficient management of energy resources. Therein, the real-time power balance between supply and demand has emerged as one pressing concern for system stability operation. However, current methods focus more on minute-level and hour-level power optimal scheduling methods applied in RIETES. To achieve real-time power balance, this paper proposes one virtual asynchronous machine(VAM) control using heat with large inertia and electricity with fast response speed. First, the coupling timescale model is developed that considers the dynamic response time scales of both electric and thermal energy systems. Second, a real-time power balance strategy based on VAM control can be adopted to the load power variation and enhance the dynamic frequency response. Then, an adaptive inertia control method based on temperature variation is proposed, and the unified expression is further established. In addition, the small-signal stability of the proposed control strategy is validated. Finally, the effectiveness of this control strategy is confirmed through MATLAB/Simulink and HIL(Hardware-in-the-Loop) experiments.展开更多
中等规模风电通常经35 k V及以上电压等级系统直接并入地区电网,具有非均匀接入特性及不确定性,易导致地区电网出现局部消纳困难与局部负荷重载并存的现象,造成阻塞风险甚至消纳困境。基于高压配电网的拓扑重构能力,提出以110 kV变电单...中等规模风电通常经35 k V及以上电压等级系统直接并入地区电网,具有非均匀接入特性及不确定性,易导致地区电网出现局部消纳困难与局部负荷重载并存的现象,造成阻塞风险甚至消纳困境。基于高压配电网的拓扑重构能力,提出以110 kV变电单元组的可行拓扑状态为控制对象的高压配电网机会约束转供模型,利用风电-负荷误差的概率密度函数对随机变量进行多状态建模,以源荷功率均衡分布为目标,构建不确定性条件下以拓扑重构为手段的高压电网运行优化技术。实际算例测试表明,所提方法能有效疏导高渗透率风电非均匀接入后地区高压电网的消纳矛盾,并有助于提升高压电网资产的利用效率以平抑阻塞风险。展开更多
基金supported by the National Key R&D Program of China (Grant No. 2022YFB3304001)the Major Program of the National Natural Science Foundation of China (Grant No. 52293413)。
文摘The development of regional integrated electric-thermal energy systems(RIETES) is considered a promising direction for modern energy supply systems. These systems provide a significant potential to enhance the comprehensive utilization and efficient management of energy resources. Therein, the real-time power balance between supply and demand has emerged as one pressing concern for system stability operation. However, current methods focus more on minute-level and hour-level power optimal scheduling methods applied in RIETES. To achieve real-time power balance, this paper proposes one virtual asynchronous machine(VAM) control using heat with large inertia and electricity with fast response speed. First, the coupling timescale model is developed that considers the dynamic response time scales of both electric and thermal energy systems. Second, a real-time power balance strategy based on VAM control can be adopted to the load power variation and enhance the dynamic frequency response. Then, an adaptive inertia control method based on temperature variation is proposed, and the unified expression is further established. In addition, the small-signal stability of the proposed control strategy is validated. Finally, the effectiveness of this control strategy is confirmed through MATLAB/Simulink and HIL(Hardware-in-the-Loop) experiments.
文摘中等规模风电通常经35 k V及以上电压等级系统直接并入地区电网,具有非均匀接入特性及不确定性,易导致地区电网出现局部消纳困难与局部负荷重载并存的现象,造成阻塞风险甚至消纳困境。基于高压配电网的拓扑重构能力,提出以110 kV变电单元组的可行拓扑状态为控制对象的高压配电网机会约束转供模型,利用风电-负荷误差的概率密度函数对随机变量进行多状态建模,以源荷功率均衡分布为目标,构建不确定性条件下以拓扑重构为手段的高压电网运行优化技术。实际算例测试表明,所提方法能有效疏导高渗透率风电非均匀接入后地区高压电网的消纳矛盾,并有助于提升高压电网资产的利用效率以平抑阻塞风险。
