The invention relates to a real-time control method of indirect air-cooled generator set cold end back pressure. Optimal economic back pressure corresponding to different loads under different environment temperatures is obtained by using a DCS control system according to a thermal load change of a condenser under different working conditions, influence of the back pressure on power and power consumption of different host circulating water flows, and automatic control is realized in a unit DCS. A control process comprises the following steps of (1) determining power consumption of different circulating water amounts; (2) determining a host circulating water flow; (3) determining the thermal load of the condenser; (4) determining a temperature rise of condenser circulating water; (5) determining the back pressure of the condenser; (6) determining the influence of the back pressure on an unit load; (7) determining the optimal economic back pressure and the corresponding circulating wateramount; and (8) adjusting a frequency of a circulating pump. According to the different working conditions of the condenser, the DCS control system is used for automatic real-time regulation and control, real-time regulation of the optimized economic back pressure of the unit is achieved, and economic benefits of production of an indirect air cooling generator set are improved.

Real-time control method of indirect air-cooled generator set cold end back pressure

The invention relates to an optimization method of the back pressure and circulating water yield of a turbo generator unit. The optimization method includes the steps: (1) the environment temperaturechange of 2-3 DEG C is a group, and the circulating water yield of 50-100% is tested; (2) test parameters are recorded; (3) deviation values of temperature and pressure parameters of main steam are corrected; (4) an optimal circulating water yield and an optimal economic back pressure value are determined; (5) optimal circulating water yield corresponding values of different environment temperatures and unit loads are worked out; (6) the unit is operated, and the optimal back pressure is verified; (7) a curve of the circulating water yield is drawn and an expression of the optimal circulatingwater yield is obtained; (8) the circulating water yield corresponding to the optimal back pressure is modified; (9) a formula of the optimal circulating water yield with different loads in an interval is obtained by taking every three-degree change of the environment temperatures as the interval; and (10) the optimal circulating water yield of the adjustment back pressure of each environment temperature is obtained. According to the optimization method of the back pressure and circulating water yield of the turbo generator unit, the turbo generator unit operates under the optimum condition, the comprehensive coal consumption rate and circulating water consumption rate are decreased advantageously, energy is utilized efficiently, and the economy efficiency of the turbo generator unit is improved.

Optimization method of back pressure and circulating water yield of turbo generator unit

The invention relates to a primary frequency modulation real-time monitoring method for a power plant, which comprises the following steps: (1) acquiring data, wherein the data comprises a GC instruction, a unit actual power, a primary frequency modulation action state, a primary frequency modulation load limitation, a unit rotating speed and a frequency difference; (2) carrying out integration, accumulation and logic operation by using a DCS system, wherein the calculated contents comprise a 15-second output response index, a 30-second output response index and an electric quantity contribution index; (3) executing a frequency modulation action; (4) judging whether the actual value and the theoretical value of the primary frequency modulation action accord with each other, if so, displaying data, prompting and calculating the deviation value; (5) calculating the accuracy rate and counting the daily action situation. According to the primary frequency modulation real-time monitoring method for the power plant, the DCS system is utilized to realize the real-time monitoring on the monitoring and statistics of primary frequency modulation of the power plant, statistics and analysis are carried out on related parameters, and safety and stability of power production are improved.

Primary frequency modulation real-time monitoring method for power plant

The invention relates to a large through-flow pipeline heat supplying system capable of totally recycling waste heat of a thermal power plant. The large through-flow pipeline heat supplying system comprises a turbine set heat supplying pipe network, heat pumps of waste heat, heat supplying network heaters and an indirect cooling water tower; high-medium-pressure cylinders of turbine sets are connected with low-pressure cylinders through steam lines, and condensers communicate with the low-pressure cylinders. The condensers are divided into two lines through circulating water pumps, one line isconnected with the indirect cooling water tower in a circulating mode, and the other line is connected with the heat pumps of the waste heat through a main engine circulating water pipeline in a circulating mode. A water return pipeline of the heat supplying pipe network is connected to tube passes of the heat supplying network heaters through the heaters of the waste heat or connected with the tube passes of the heat supplying network heaters directly, and the outlets of the tube passes of the heat supplying network heaters are connected with a water supplying pipeline. Steam discharging ports of the high-medium-pressure cylinders in turbines are connected to shell passes of the heat supplying network heaters. According to the large through-flow pipeline heat supplying system capable oftotally recycling the waste heat of the thermal power plant, the large through-flow pipeline heat supplying system recycles and uses all quantity of waste heat of cold ends of the turbines and heat dissipating capacity of auxiliary engines, the comprehensive utilization rate of energy is improved, and under the premise that no heat supplying units are additively arranged, the heat supplying capacity is increased by 30%.

Large-through-flow pipeline heat supply system capable of completely recycling waste heat of thermal power plant

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Optimization method of back pressure and circulating water yield of turbo generator unit

Primary frequency modulation real-time monitoring method for power plant

Large-through-flow pipeline heat supply system capable of completely recycling waste heat of thermal power plant