The electrical energy generated from renewable energy resources connected to transmission and distribution systems and the displacement of synchronous generators continues to grow. This presages a paradigm-shift away from the traditional provision of ancillary services, essential to ensure a robust system, from transmission-connected synchronous generators towards provision from synchronous and non-synchronous generation (including distribution-connected resources). Given that the available resources at the disposal of system operators are continuously increasing, the flexibility for operating the network can be enlarged. In this context, this paper introduces a dedicated voltage ancillary services strategy for provision of reactive power. A main feature of the proposed strategy is that it is technology-neutral, unlike existing ones that are focused on synchronous generators. The system need for voltage stability is placed at the core of this strategy, which is translated into a requirement for reactive power provision. The proposed strategy achieves, through the combined utilization of distributed generation and traditional resources, to defer the investments in reactive compensating equipment. Dynamic and transient studies are conducted to demonstrate the technical benefits of the strategy, while its practical feasibility is also validated through hardware-in-the-loop testing.

中文翻译：

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通过增强的TSO-DSO交互作用和聚集的分布式能源来提供电压辅助服务

连接到输配电系统的可再生能源产生的电能以及同步发电机的排量不断增长。这预示着从传统的辅助服务提供模式转变，而传统的辅助服务是确保系统健壮的基础，从传输连接的同步发电机转向同步和非同步发电（包括与配电连接的资源）的供应。由于系统运营商可以使用的可用资源不断增加，因此可以扩大网络运营的灵活性。在这种情况下，本文介绍了一种用于提供无功功率的专用电压辅助服务策略。拟议策略的主要特点是它与技术无关，与专注于同步发电机的现有发电机不同。系统对电压稳定性的需求置于此策略的核心，这转化为对无功功率的要求。通过结合利用分布式发电和传统资源，所提出的策略可以推迟对无功补偿设备的投资。进行了动态和瞬态研究，以证明该策略的技术优势，同时其实际可行性也通过硬件在环测试得到了验证。通过分布式发电和传统资源的综合利用，推迟对无功补偿设备的投资。进行了动态和瞬态研究，以证明该策略的技术优势，同时其实际可行性也通过硬件在环测试得到了验证。通过分布式发电和传统资源的综合利用，推迟对无功补偿设备的投资。进行了动态和瞬态研究，以证明该策略的技术优势，同时其实际可行性也通过硬件在环测试得到了验证。