High-Pressure Bump Frequency Conversion of Turbine Cooling Air System Control Strategy for High Parameter Combined Cycle Extraction Condensing and Back Pressure Unit
In order to cope with large flow heating,high back pressure units have strong heating capacity and high heating efficiency.At the same time,low pressure systems are used to supply heat,reducing desuperheating water and throttling loss for low-quality heating.In order to meet the requirements of the fuel gas heating and turbine cooling air(TCA)systems of the gas turbine,the system controllability becomes poor.The traditional high-voltage frequency converter controls the outlet pressure.During peak shaving of the unit,the frequency conversion parameters cannot change with the working conditions of the unit,resulting in low turbine cooling air systems flow.To ensure that TCA improves the frequency conversion parameters,the high-voltage frequency converter will operate near the power frequency for a long time without saving energy.In order to ensure the safe operation of the unit and make full use of frequency conversion for energy conservation,a control strategy of differential pressure hysteresis function control and gas turbine load optimization for TCA flow and the lowest frequency of frequency conversion is proposed.
black pressurefrequency conversionturbine cooling airenergy conservationhysteresis function
万方数据
维普
