On stability of islanded low-inertia microgrids
On stability of islanded low-inertia microgrids
复制标题
DOI：
10.1109/psc.2016.7462854
复制
发表时间：
2016-03
期刊：
影响因子：
--
通讯作者：
O. Daǧ;B. Mirafzal
中科院分区：
文献类型：
--
作者：
O. Daǧ;B. Mirafzal
随着微电网中分布式能源（DERs）数量的增加，频率和电压不稳定的可能性也在增加。特别是，在孤岛模式下，频率和电压的控制成为一个挑战，因为与有电网支持的并网模式相比，分布式电源固有的低惯性特性。这种不稳定性问题在低电压或中压低惯性mg中变得更糟，其中线路阻抗主要是电阻性的。本文的目的是演示孤岛中压mg可能出现的稳定性和电能质量问题。PSCAD/EMTDC仿真结果表明，当电力公司采用更多的低惯性发电机组时，频率和电压稳定性的重要性。
As the number of distributed energy sources (DERs) increases in a microgrid (MG), the likelihood of frequency and voltage instabilities increases. In particular, the control of frequency and voltage becomes a challenge in an islanded mode due to the inherent low-inertia feature of DERs compared to a grid-tied mode where there is a grid support. This instability problem becomes worse for low or medium voltage low-inertia MGs, where the line impedance is dominantly resistive. The goal of this paper is to demonstrate the stability and power quality problems that can occur in islanded medium voltage MGs. PSCAD/EMTDC simulation results for an MG with a high share of low-inertia power generation units illustrate the importance of the frequency and voltage stability as power utilities adopting more DERs.