Combined Performance Analysis of CHP System

This paper studies the full conditions of CHP system under taking the heat-supply network, thermal-system heater and cogeneration steam turbine as a whole. The combined performance can be obtained according to the performance of heat-supply network, thermal-system heater and low pressure cylinder. Analyzed qualitative the combined performance, it can be accurately obtained that the variations of the extraction parameters for heating, the exhaust steam pressure of intermediate pressure cylinder last stage and the inlet steam pressure of low pressure cylinder are due to the variations of heat load under the all operating conditions of the CHP system; non-throttle operating point, which is proposed by this paper, is the best operating point of units, at the time, there are no throttle loss at the governing valve of low pressure cylinder and the control valve of heating extraction.