Several calculation methods of auxiliary power consumption rate for current condensing power plants and combined heat and power projects were summarized.The applicable scope

the advantages and disadvantages of these methods were discussed respectively.On this basis

a new calculating method of auxiliary power consumption rate for gas-fired combined cooling heating and power distributed energy system was proposed

which considers various operating conditions all year round.By this method

the cooling power consumption rate

heating power consumption rate

generating power consumption rate and total power consumption rate were calculated separately

which are all annual average values.Moreover

taking the distributed energy station in Huadian Industrial Park as an example

according to the hourly load forecasting data all year round

different operation strategies in cooling season

heating season and transition season were developed typically.Depending on the operating conditions

the cooling

heating

generating and total power consumption rate were calculated.The results show that

the cooling

heating and generating costs allocation were reflected reasonably by the calculated indices using this method

which provides a basis for the cost control and economic operation of the distributed energy station.