On the Costs of Grid Inertia
On the Costs of Grid Inertia
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DOI：
10.1109/oses.2019.8867342
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发表时间：
2019-07
期刊：
影响因子：
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通讯作者：
A. Hoskin;S. Garvey;J. Rouse;B. Cárdenas
中科院分区：
文献类型：
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作者：
A. Hoskin;S. Garvey;J. Rouse;B. Cárdenas
惯性在电网稳定中起着重要的作用。当有一个供应和需求之间的差异，电网频率将改变。惯性抵抗这种变化，并限制频率变化率（RoCoF），使发电站有时间改变其供应以满足需求。传统的火力发电站在发电机和蒸汽涡轮机中具有显著的惯性。风能和太阳能等可再生能源往往具有很小或没有惯性，因此电网惯性已经降低，并且未来将继续降低，从而导致电网稳定性问题。有多种方法可以解决这个问题，包括：取代电网惯性，增加允许的最大RoCoF水平，或最大限度地减少电网上的最大发电机或负载。惯性在传统上并不是一种交易商品，因为它是大型火力发电的副产品。随着非同步发电的增加，这种情况可能会在未来发生变化。创建网格惯性的成本和方法在某种程度上是新领域。本文概述了一些创建网格惯性的选项。它还介绍了SHyKESS，这是一种基于飞轮的方法，建立电网惯性和主频率控制。
Inertia plays an important role in the function of electrical grid stability. When there is a difference between supply and demand grid frequency will change. Inertia resists this change and limits the rate of change of frequency (RoCoF) giving time for power stations to change their supply to match demand. Traditional thermal power stations have significant amounts of inertia in their generators and steam turbines. Renewable energy sources such as wind and solar tend to have little or no inertia and as a result grid inertia has reduced and will continue to do so in the future, causing issues of grid stability. There are various ways to address this problem including: replacing grid inertia, increasing the maximum level of RoCoF allowed, or minimising the largest generator or load on the grid. Inertia hasn't traditionally been a traded commodity as it has been a by-product of large thermal power generation. This is likely to change in the future with the increase in non-synchronous generation. The costs and methods of creating grid inertia are somewhat novel fields. This paper surveys some of the options of creating grid inertia. It also presents SHyKESS which is a flywheel based method of creating grid inertia and primary frequency control.