counter-deviation

this arises in the situation where system deviation is positive and the settlement entity deviation is negative, or vice versa. This means that the balance group of the settlement entity consumed / produced more or less electricity relative to the plan, but this, in fact, helped to balance the system deviation and thus reduce the need for regulation electricity. Counter-deviations represent a way in which billing entities, such as electricity suppliers, can generate a profit.
SOURCE: https://www.informacni-portal.cz