Ofgem has imposed a hefty £9.78m penalty on SSE Generation for securing excessive payments from the UK’s electricity system operator, which was in breach of its licence and raised costs for customers. SSE Generation are expected to pay the sum in full by Tuesday 5 September. The watchdog confirmed the penalty will be paid into its voluntary redress fund, a support kitty for vulnerable households, after first proposing the fine last month. It determined that the company gained excessive payments from the ESO during periods of what is…