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容纳新的发电技术，特别是间歇性可再生资源。公用事业公司已经认识到需要对其资产进行重大技术改进。他们需要具有成本效益的技术解决方案，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人安全。DG集成和实现主动配电系统（ADS）的自愈兼容性的主要障碍之一是DG对故障电流的贡献。这种贡献对传统故障检测和诊断技术的准确性有很大的影响，这反过来又危及高效可靠的自修复ADS的实现。此外，配电系统运营商（DSO）通常采用非常保守的限制，以避免损坏他们的配电系统设备，由于DG的贡献，短路电流通过限制允许的渗透水平的DG到他们的系统。由于各种Transformer站的短路容量有限，安大略省最近拒绝或延迟了许多DG互连的应用。需要考虑DG对故障电流的贡献的先进且有效的故障检测技术。此外，需要新的规划和运行控制工具，以尽量减少DG的短路贡献。拟议的研究项目旨在开发智能，开拓，创新和全面的解决方案，以尽量减少分布式发电的电网集成对故障电流贡献，检测和诊断的影响。这项工作将有助于促进分布式发电，特别是可再生能源的整合，并使ADS具有自愈能力，以提高配电网的运行性能，提高系统效率和可靠性。

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 theirsystems. 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.