Based on the optimization system platform for the ultra supercritical 1000 MW double reheat unit in China Huaneng Laiwu Power Generation Co.

Ltd.

statistical analysis for historical data of the performance index of real-time computation was carried out to obtain the relationship curves between the generator output and the main performance indexes of the unit

such as the boiler efficiency and steam turbine heat rate.Thus

the operation level of the unit was obtained and compared with the unit performance evaluation results

it finds that the calculation result agrees well with the test result.Moreover

the optimal performance curve of the unit was obtained by using the condition optimization module

and the data under different operating conditions at the same load were compared.The results show that

the energy saving potential can be further explored by routine operation adjustment

and the coal consumption of 3.99~4.59 g/(kW·h) can be further saved

which has important guiding significance for optimal operation of the double reheat units.