在双碳目标的背景下,公平分摊电力系统各参与主体碳责任,对实现电力系统低碳发展具有重要意义。从价值和收益对等原则考虑,不管所处电网位置如何,只要对于全社会碳减排有贡献就应该根据其贡献程度进行奖励,因此,该文提出一种“位置公平...在双碳目标的背景下,公平分摊电力系统各参与主体碳责任,对实现电力系统低碳发展具有重要意义。从价值和收益对等原则考虑,不管所处电网位置如何,只要对于全社会碳减排有贡献就应该根据其贡献程度进行奖励,因此,该文提出一种“位置公平”的用户侧碳责任分摊方法。首先独立系统运营商(Independent System Operator,ISO)以发电成本最小化进行预出清,基于平均碳排放因子计算预出清各负荷碳责任,接着利用平均边际碳排放率对负荷侧碳责任进行调整核算,建立考虑碳责分摊的ISO-负荷侧需求响应双层优化模型。通过算例分析与碳流理论碳责任分摊方法进行对比,结果显示所提方法能够在需求响应前后公平合理地计量各节点负荷碳排放责任,有效促进电力系统源荷互动减碳,降低整体碳排放,验证了所提方法的有效性与优越性。展开更多
A novel transient rotor current control scheme is proposed in this paper for a doubly-fed induction generator（DFIG）equipped with a superconducting magnetic energy storage（SMES） device to enhance its transient volt...A novel transient rotor current control scheme is proposed in this paper for a doubly-fed induction generator（DFIG）equipped with a superconducting magnetic energy storage（SMES） device to enhance its transient voltage and frequency support capacity during grid faults. The SMES connected to the DC-link capacitor of the DFIG is controlled to regulate the transient dc-link voltage so that the whole capacity of the grid side converter（GSC） is dedicated to injecting reactive power to the grid for the transient voltage support. However, the rotor-side converter（RSC） has different control tasks for different periods of the grid fault. Firstly, for Period I, the RSC injects the demagnetizing current to ensure the controllability of the rotor voltage. Then, since the dc stator flux degenerates rapidly in Period II, the required demagnetizing current is low in Period II and the RSC uses the spare capacity to additionally generate the reactive（priority） and active current so that the transient voltage capability is corroborated and the DFIG also positively responds to the system frequency dynamic at the earliest time. Finally, a small amount of demagnetizing current is provided after the fault clearance. Most of the RSC capacity is used to inject the active current to further support the frequency recovery of the system. Simulations are carried out on a simple power system with a wind farm. Comparisons with other commonly used control methods are performed to validate the proposed control method.展开更多
文摘在双碳目标的背景下,公平分摊电力系统各参与主体碳责任,对实现电力系统低碳发展具有重要意义。从价值和收益对等原则考虑,不管所处电网位置如何,只要对于全社会碳减排有贡献就应该根据其贡献程度进行奖励,因此,该文提出一种“位置公平”的用户侧碳责任分摊方法。首先独立系统运营商(Independent System Operator,ISO)以发电成本最小化进行预出清,基于平均碳排放因子计算预出清各负荷碳责任,接着利用平均边际碳排放率对负荷侧碳责任进行调整核算,建立考虑碳责分摊的ISO-负荷侧需求响应双层优化模型。通过算例分析与碳流理论碳责任分摊方法进行对比,结果显示所提方法能够在需求响应前后公平合理地计量各节点负荷碳排放责任,有效促进电力系统源荷互动减碳,降低整体碳排放,验证了所提方法的有效性与优越性。
基金supported by the National Natural Science Foundation of China(Grant No.51307124)the Major Program of the National Natural Science Foundation of China(Grant No.51190105)
文摘A novel transient rotor current control scheme is proposed in this paper for a doubly-fed induction generator（DFIG）equipped with a superconducting magnetic energy storage（SMES） device to enhance its transient voltage and frequency support capacity during grid faults. The SMES connected to the DC-link capacitor of the DFIG is controlled to regulate the transient dc-link voltage so that the whole capacity of the grid side converter（GSC） is dedicated to injecting reactive power to the grid for the transient voltage support. However, the rotor-side converter（RSC） has different control tasks for different periods of the grid fault. Firstly, for Period I, the RSC injects the demagnetizing current to ensure the controllability of the rotor voltage. Then, since the dc stator flux degenerates rapidly in Period II, the required demagnetizing current is low in Period II and the RSC uses the spare capacity to additionally generate the reactive（priority） and active current so that the transient voltage capability is corroborated and the DFIG also positively responds to the system frequency dynamic at the earliest time. Finally, a small amount of demagnetizing current is provided after the fault clearance. Most of the RSC capacity is used to inject the active current to further support the frequency recovery of the system. Simulations are carried out on a simple power system with a wind farm. Comparisons with other commonly used control methods are performed to validate the proposed control method.
