The distributed energy supply（DES） system is a small modularized energy supply system

which can be allocated near the cusumers

and imdependently providing the consumers with electricity

heat or（and） cool

having features such as highly effective environmental protection

safety in application

and convenience in operation

etc.Combined with practical application of triplex cogeneration system for cool

heat and electricity in Shanghai Zizhu Science Park Zone

a typical DES system

which takes the natural gas as fuel

and makes the micro-type gas turbine as prime mover

has been presented

and the control function

configuration

hardware and software constitutes

as well as realization method of the said control system

which takes programmable logic controller（PLC） as the core

being expounded in detail.