A number of Semi-Scheduled generators offer (i.e. bid) their generation below $0/MWh – but above -$100/MWh.
From time to time we might refer to these types of bids as ‘Negative LGC’ in the basis that the cost which the generator would incur for generating in the NEM (i.e. if their bid was to set the spot price) would be offset by the revenue they would earn from the sale of the LGC generated at the same time.
In relation to bidding, and how dispatch works, these resources might be of use.