K. Radhakrishnan, former KSEB Member (Generation), has said that given the peculiarities of the Kerala power system, any decision on large-scale grid connection to seasonal resources such as solar and wind power plants should be taken cautiously to maintain the power system security.

He said this while inaugurating a technical seminar on ‘Grid connectivity of renewable energy: issues and solutions’ organised by the KSEB Engineers Association and the Kerala Chapter of the Institution of Electrical and Electronic Engineers at the TKM College of Engineering here on Thursday.

In comparison to the neighbouring States, the Kerala power system was very small and could not withstand the sudden withdrawal of seasonal energy resource if it exceeded 10-15 per cent of the total sources. It would result in cascade dripping. With very high per cent of domestic load in Kerala, which stood at around 50 per cent compared to 30 per cent in other States, the load curve was very steep. A load curve was a chart showing the amount of power consumers use over a period of time. The load increases by two or three fold in the evening hours and without effective measures to flatten the curve, power generation would become uneconomical. Allowing large-scale connectivity to solar power would make the situation worse as the day load would be further reduced and evening load would be increased. Solar and wind power being infirm called for more investment to install backup power for an equal amount, he said.