Stabilisation of Frequency and Voltage in an Off-Grid Power System with Energy Storage under Abruptly Variable Load

One of the features of off-grid power systems supplying electricity to industrial facilities of the fuel-and-energy and mineral-resource sectors is the comparability of the installed generation capacity and the power of the largest electricity consumers. When the load is abruptly variable, this results in significant deviations of frequency and voltage. Consequently, the failure rate of generator sets increases, the stability of motor loads decreases, the wear of electrical machines accelerates, the overhaul interval of major equipment reduces, and expenditures on its repair and maintenance rise.