Enabling high penetration of distributed generation and self-healing capabilities of active distribution systems

公用事业运营商现在面临着管理和运营其配电网络的新挑战。目前的电力网络基础设施无法适应新的发电技术，特别是间歇性的可再生资源。公用事业公司已经认识到有必要对其资产进行重大技术演变。他们需要经济高效的技术解决方案，使配电线路能够适应更多的分布式发电(DG)、存储和需求侧管理(DSM)策略，而不影响客户服务和工作人员的安全。**DG集成和实现有源配电系统(ADSS)的自愈兼容性的主要障碍之一是DG对故障电流的贡献。这种贡献极大地影响了传统故障检测和诊断技术的准确性，进而危及高效和可靠的自愈ADSS的实施。此外，配电系统运营商(DSO)通常通过限制DG对其**系统的允许穿透水平来实施非常保守的限制，以避免DG对短路电流的贡献对其配电系统设备造成损害。由于各种变电站的短路容量有限，安大略省最近拒绝或推迟了许多分布式电源互连的申请。**需要先进而有效的故障检测技术，考虑分布式电源对故障电流的贡献。此外，需要新的规划和运行控制工具，以最大限度地减少分布式电源的短路贡献。拟议的研究项目旨在开发智能、开创性、创新性和综合性的解决方案，以最大限度地减少分布式发电并网对故障电流贡献、检测和诊断的影响。这项工作将有助于促进分布式发电，特别是可再生资源的整合，并使ADSS的自愈能力能够增强配电网的运行性能，提高系统的效率和可靠性。

Utility operators are now facing new challenges in managing and operating their distribution networks. Current electricity network infrastructure is incapable of accommodating new generation technologies, in particular intermittent renewable resources. Utility companies have recognized the need for a major technological evolution of their assets. They need cost-effective technical solutions that will allow distribution lines to accommodate more distributed generation (DG), storage and demand-side management (DSM) strategies without affecting customer service and worker safety.**One of the main barriers to the integration of DGs and enabling the self-healing compatibilities of Active Distribution Systems (ADSs) is the DGs contribution to fault currents. Such contribution has a great impact on the accuracy of conventional fault detection and diagnosis techniques which in turn jeopardise the implementation of efficient and reliable self-healing ADSs. Moreover, distribution system operators (DSOs) usually apply very conservative limits to avoid damage to their distribution system equipment due to the contribution of DGs to short circuit currents by limiting the permissible penetration levels of DGs into their**systems. Many applications for DGs interconnections has been recently rejected or delayed in Ontario due to the limited short-circuit capacity at various transformer stations.**There is a need for advanced and efficient fault detection techniques that consider the DGs contribution to fault currents. Moreover, new planning and operation control tools are required to minimize the short circuit contribution of DGs. The proposed research project aims to develop smart, pioneering, innovative and comprehensive solutions for minimizing the impact of grid integration of distributed generation on fault current contribution, detection and diagnosis. This work will help to facilitate the integration of distributed generation,**especially renewable resources, and enable the self-healing capabilities for ADSs to enhance the operational performance of the distribution network and increase system efficiency and reliability.