The invention relates to a
thermodynamic system for improving
heat supply unit electric output adjusting capacity. The
thermodynamic system is characterized in that main steam or reheating section steam is subject to
temperature and pressure reduction to directly serve as heat source steam for industrial heat users; an
absorption heat pump 23 of a first-stage heat exchange device serves as a heatsource of a first-stage heat exchange
station 25 in the heating period to supply heat to heat users 29 and supplies cold to the users in the non-
heat supply period; a high-pressure electric boiler 24of a second-stage heat exchange device improves the
boiler water feeding temperature, reduces heat absorbed by boiler fed water in an
economizer 4, accordingly improves the boiler
tail smoke discharging temperature, and guarantees normal running of an SCR denitration device 5; and according to a three-stage heat exchange device, exhaust steam of a
turbine intermediate pressure cylinder 8 serves asheat source steam of a third-stage heat exchange
station 27, the unit
heat load is guaranteed, and the heat using requirement of the heat users 29 is met. The electric output adjusting capacity of the
heat supply unit can be improved, it is guaranteed that the unit heat supply capacity is not decreased under the
low load running working conditions, pyroelectric decoupling is achieved, and the electric output adjusting capacity of the heat supply unit is improved.