Dynamic Enhancement and Protection of Power Systems with Large Penetration of Renewable Energy

可再生能源大量渗透的电力系统动态增强与保护

• 批准号: RGPIN-2016-03727
• 负责人: Faried, Sherif
• 金额: $ 2.26万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=614581
• 关键词: Dynamic; Enhancement; Protection; Power; Systems

The need to address global climate change, a worldwide environmental phenomenon that will affect everyone on earth, is the most public driving force for the utilization of renewable energy. Grid integration of large capacity of renewable energy sources and the use of large capacity of electrical energy storage is now a reality. These types of grid require, however, new approaches for system dynamic enhancement and protection. The research work that the applicant is planned to undertake will advance upon two major thrusts. Thrust 1: Dynamic Enhancement of Power Systems with Large Capacity of Renewable Energies This thrust will explore the potential use of supplemental controls of Doubly-Fed Induction Generator (DFIG) and Full-Scale Frequency Converter (FFC) wind farms for the mitigation of subsynchronous resonance (SSR: the interaction between series capacitor compensated transmission systems and turbine-generator shaft system) and subsynchronous interaction (SSI: the interaction between series capacitor compensated transmission systems and DFIG-based wind farms). As most large wind farms employ DFIG and FFC wind turbines, their voltage-sourced converter-based back-to-backs (BtBs) offer decoupled control of the real and reactive power. The use of these control capabilities have been recently proposed for damping power swings, inter-area oscillations and SSI. In integrated power systems incorporating series capacitor compensated transmission lines and high penetration of wind energy conversion systems, SSR and SSI could exist simultaneously during some system contingences. Thus, alleviating SSR and SSI has been an attractive area of research and development targeting at developing practical and effective countermeasures. Thrust 2: Protection of Power Systems with Large Capacity of Renewable Energies The results of the investigations on the impact of midpoint STATCOM on the performance of generator phase backup protection and generator loss of excitation protection have revealed that the midpoint STATCOM has an adverse effect on such protections which can be in the form of underreach, overreach or a time delay. As the Grid-Side Converters of DFIG and FFC wind turbines appear to the generators as STATCOMs, high penetration of these types of renewable energy conversion systems is expected to have an adverse effect on the performance of generator distance relays. A major investigation in this thrust is exploring the impact of high penetration of wind energy conversion systems on generator distance phase backup protection and loss of excitation protection in order to identify the important issues that protection engineers need to consider when designing and setting the protection system. In addition, practical and feasible solutions to mitigate the adverse impact of renewable energy conversion systems on generator and transmission line distance protection will be explored.

应对全球气候变化这一影响地球上每一个人的世界性环境现象的需要是利用可再生能源的最公开的驱动力。大容量可再生能源的电网整合和大容量电能存储的使用现在已经成为现实。然而，这些类型的网格需要新的方法来进行系统动态增强和保护。申请人计划开展的研究工作将在两个主要方面取得进展。 重点1：大容量可再生能源电力系统的动态增强 本研究将探索双馈感应发电机（DFIG）和全频变频器（FFC）风电场辅助控制的潜在用途，以缓解次同步谐振（SSR：串联电容补偿输电系统与涡轮发电机轴系之间的相互作用）和次同步相互作用（SSI：串联电容补偿输电系统与基于DFIG的风电场之间的相互作用）。 由于大多数大型风电场采用DFIG和FFC风力涡轮机，因此其基于电压源变流器的背靠背（BtB）提供了对真实的和无功功率的解耦控制。这些控制能力的使用最近已被提议用于阻尼功率摆动、区域间振荡和SSI。在包含串联电容补偿输电线路和高穿透率风能转换系统的综合电力系统中，在某些系统事故期间，SSR和SSI可能同时存在。因此，减轻SSR和SSI一直是一个有吸引力的研究和开发领域，旨在制定切实有效的对策。 重点2：保护具有大容量可再生能源的电力系统 中点STATCOM对发电机相位后备保护和发电机失磁保护性能影响的调查结果表明，中点STATCOM对此类保护具有不利影响，其形式可能是欠范围、超范围或延时。 由于DFIG和FFC风力涡轮机的网侧转换器对发电机来说是STATCOM，因此这些类型的可再生能源转换系统的高渗透率预计会对发电机距离继电器的性能产生不利影响。 这方面的主要研究是探索风能转换系统的高穿透性对发电机距离相位后备保护和失磁保护的影响，以确定保护工程师在设计和设置保护系统时需要考虑的重要问题。此外，还将探讨切实可行的解决方案，以减轻可再生能源转换系统对发电机和输电线路距离保护的不利影响。