Energy Storage Configuration Method of Sending End Grid considering Frequency Deviation Limit
摘要
As a large proportion of new energy is connected to the power grid, the impact of its intermittency and volatility on the safe and stable operation of the power grid is also increasing, which puts forward higher requirements for system stability. For the power grid at the sending end, a large ratio of new energy is connected and thus reduce the inertia of the system. When a fault such as DC interlocking occurs, it is easy to cause high-frequency generator tripping of the system and cause a large amount of economic losses. To this end, this paper proposes an energy storage configuration method based on bottleneck identification. While considering multi-dimensional operational risks, frequency deviation constraints are added. The identified operating bottleneck scenarios include various frequency deviation out of limit scenarios, which are more in line with the actual scenarios of power grid operation. Finally, the identified operating bottlenecks are eliminated by configuring energy storage, and the effectiveness of frequency regulation of the calculated energy storage capacity is proved through relevant examples.
