Load demand management with high renewable energy penetration in distribution systems

配电系统中可再生能源渗透率高的负载需求管理

• 批准号: RGPIN-2016-04580
• 负责人: Chandra, Ambrish
• 金额: $ 2.99万
• 依托单位: École de technologie supérieure
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=637557
• 关键词: Load; demand; management; renewable; energy

Distributed Renewable Resources (DRRs) differ from conventional and fossil-fired resources in a fundamental way. Their sources (wind velocity and solar radiation in particular) cannot be controlled or stored. Further, renewable power generation often does not correlate with consumer load demand in real time due to its high intermittency. It may lead to one of the main causes of destabilizing the power system. In light of increased penetrations of these DRRs (50-60%) with the future grid, it will be difficult even for conventional power plants to participate effectively with great impact in maintaining stability of the network. In such reformed grid structure with high DRRs penetration, it will become a real challenging task to instantaneously predict and control total power generation in the entire grid. The operation of power grid will be more deliberately governed on the basis of DRRs generation rather than consumer loads demand. The main problems which may arise are increased voltage distortions in terms of flicker, sag, swell and its harmonic contents, frequency control etc. To solve such problems, solutions are presented in literature, such as, increased rating of a stand-by DG unit and employing storage system for maintaining deficit real time load demands.

分布式可再生资源（DRR）与传统资源和化石燃料资源有着根本的不同。它们的来源（特别是风速和太阳辐射）无法控制或存储。此外，由于其高间歇性，可再生能源发电通常与消费者负载需求不实时相关。它可能是导致电力系统不稳定的主要原因之一。鉴于这些DRR在未来电网中的渗透率不断提高（50-60%），即使是传统发电厂也很难有效参与，对维持网络的稳定性产生巨大影响。在这种具有高DRR渗透率的改革电网结构中，即时预测和控制整个电网的总发电量将成为一项真正具有挑战性的任务。电网的运行将更加谨慎地根据减灾发电而不是消费者负荷需求进行管理。可能出现的主要问题是在闪变、暂降、暂升及其谐波含量、频率控制等方面增加电压畸变。为了解决这些问题，文献中提出了解决方案，例如增加备用 DG 单元的额定值并采用存储系统来维持不足的实时负载需求。