Combined heat and power dispatch model for power system with heat accumulator

The operational characteristics and peaking capacity of CHP(Combined Heat and Power) unit with and without heat accumulator are analyzed,the basic operating mechanism of wind power accommodation by heat accumulator is discussed,and the CHP dispatch model with heat accumulator is built. Compared with the traditional model,the built model has additional restraints :the system heat balance,the thermoelectric coupling of CHP unit and the operation of heat accumulator,and takes the minimum total coal consumption for both electricity and heat as its objective. Case study verifies that,the proposed model is effective,the CHP plant with heat accumulator can effectively improve the wind power accommodation level of power grid,and the coal saved per 1 MW·h wind power accommodation by heat accumulator is better than that by electric boiler.