直流参与稳定控制的典型场景及技术需求

A Survey on Typical Scenarios and Technology Needs for HVDC Participated into Stability Control

能源资源与负荷中心逆向分布特征,决定了为提升能源综合使用效率、实现跨大区资源优化配置,需大力发展特高压直流输电技术。在目标电网发展和演变进程中,交直流混联电网将会呈现出混联结构差异化、电源类型多元化、直流落点规模化、交直耦合效应和动态行为复杂化等特征,不同混联格局则具有其鲜明的稳定特性。应用直流多速率、大容量、多类型功率调控功能,是混联电网稳定控制的重要技术手段,也是实现智能化和柔性化控制的重要措施。以我国运行与规划电网为背景,梳理8类直流参与电网稳定控制的典型场景及策略,并提出促进工程应用的技术发展需求。研究结论,对深入理解交直流混联电网稳定特性,提升混联电网安全稳定运行控制能力,提供了重要技术支撑。

For the reverse distribution characteristic showed by energy resources and load centers, it needs to vigorously develop the ultra high-voltage direct current （UHVDC） transmission technology in order to improve energy efficiency and realize inter-regional optimal allocation of resources. In the process of target grid development and evolution, the DC and AC hybrid grid will show many features, such as pluralism of the power type, diversification of hybrid structuration, compacted location of DC converter, complication of coupling characteristic and dynamic behavior. Different hybrid pattern has its distinct stability characteristics. In this paper, based on the operation and planning domestic power grid, the eight typical scenarios of HVDC participated into the stability control were presented, and the technology development requirements were proposed. Conclusions provide an important technical support for understanding the hybrid grid stability characteristic deeply and enhancing the capability of the hybrid grid stability operation.