The electric energy balance model KR70

The computer program KR70 for electric energy balance calculations is designed for detailed modelling of power systems, especially those containing hydro power. The program was developed in the beginning of the seventies by the private power industry in Sweden and has since then been used for operation and expansion planning in Sweden. Power systems comprising hydro or thermal power or combined systems can be analysed by the model. This paper begins with a general survey of model demand on input data. Long term (seasonal) optimization, comprising calculation of water value curves and long term simulation, is carefully described as the next step. Finally short term (weekly) simulation is briefly explained. (author). 10 figs