CN-116624854-B - Automatic main steam temperature adjusting method and system and electronic equipment

Abstract

The invention provides a method and a system for automatically adjusting the temperature of main steam and electronic equipment, and belongs to the field of thermal power generation. The method comprises the steps of obtaining a first side main steam temperature, a first side superheater temperature, a second side main steam temperature and a second side superheater temperature of the thermal power unit, calculating a first temperature adjustment value according to the first side main steam temperature and the first side superheater temperature, calculating a second temperature adjustment value according to the second side main steam temperature and the second side superheater temperature, calculating a temperature compensation value according to the first side main steam temperature and the second side main steam temperature, correcting the first temperature adjustment value and the second temperature adjustment value according to the temperature compensation value, wherein the corrected first temperature adjustment value is used for adjusting the opening of a first side desuperheating water valve of the thermal power unit, and the corrected second temperature adjustment value is used for adjusting the opening of a second side desuperheating water valve of the thermal power unit. The invention has the advantages of high adjusting speed and simple and convenient adjusting operation, and solves the common problem that the temperature of main steam in the operation of a thermal power plant is often deviated.

Inventors

• MA JINHONG

Assignees

• 国能龙源环保有限公司

Dates

Publication Date

20260505

Application Date

20230412

Claims (5)

1. 1. An automatic main steam temperature adjusting method, characterized in that the method comprises the following steps: acquiring a first side main steam temperature, a first side superheater temperature, a second side main steam temperature and a second side superheater temperature of the thermal power unit; calculating a first temperature adjustment value based on the first side main steam temperature and the first side superheater temperature, comprising: processing the main steam temperature at the first side and a preset temperature based on a first PID regulator to obtain a first regulating signal, wherein the preset temperature is a target value of the main steam temperature of the steam turbine during stable load; Processing the first regulating signal and the temperature of the first side superheater based on the second PID regulator to obtain a first temperature regulating value; calculating a second temperature adjustment value based on the second side main steam temperature and the second side superheater temperature, comprising: based on a third PID regulator, processing the main steam temperature at the second side and a preset temperature to obtain a second regulating signal, wherein the preset temperature is a target value of the main steam temperature of the steam turbine during stable load; processing the second regulating signal and the second side superheater temperature based on the fourth PID regulator to obtain a second temperature regulating value; Calculating a temperature compensation value according to the first side main steam temperature and the second side main steam temperature, comprising: calculating the difference value between the main steam temperature of the first side and the main steam temperature of the second side; Judging whether the difference value reaches a preset deviation upper limit or not; under the condition that the difference value reaches a preset deviation upper limit, carrying out integral operation on the difference value based on an integrator, and taking an integral result as a temperature compensation value; Correcting the first temperature regulating value and the second temperature regulating value according to the temperature compensation value to obtain a corrected first temperature regulating value and a corrected second temperature regulating value; The first temperature regulation value is corrected by superposing the temperature compensation value with the first temperature regulation value in the forward direction, the second temperature regulation value is corrected by superposing the temperature compensation value with the second temperature regulation value in the reverse direction, the corrected first temperature regulation value is used for adjusting the opening degree of a first side temperature reduction water valve of the thermal power unit, and the corrected second temperature regulation value is used for adjusting the opening degree of a second side temperature reduction water valve of the thermal power unit.
2. 2. The method of claim 1, further comprising stopping the integration of the difference if the difference is below a preset lower deviation limit.
3. 3. A main steam temperature automatic adjustment system for implementing the main steam temperature automatic adjustment method according to any one of claims 1 to 2, characterized in that the system comprises: The acquisition module is used for acquiring the first side main steam temperature, the first side superheater temperature, the second side main steam temperature and the second side superheater temperature of the thermal power unit; The first calculation module is used for calculating a first temperature adjustment value according to the first side main steam temperature and the first side superheater temperature; the second calculation module is used for calculating a second temperature adjustment value according to the second side main steam temperature and the second side superheater temperature; the third calculation module is used for calculating a temperature compensation value according to the first side main steam temperature and the second side main steam temperature; the thermal power generating unit comprises a temperature compensation module, a correction module and a control module, wherein the temperature compensation module is used for compensating a first temperature regulation value and a second temperature regulation value according to the temperature compensation value to obtain a corrected first temperature regulation value and a corrected second temperature regulation value, the corrected first temperature regulation value is used for adjusting the opening degree of a first side temperature reduction water valve of the thermal power generating unit, and the corrected second temperature regulation value is used for adjusting the opening degree of a second side temperature reduction water valve of the thermal power generating unit.
4. 4. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method for automatically adjusting the main steam temperature according to any one of claims 1-2 when executing the computer program.
5. 5. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the main steam temperature automatic adjustment method according to any one of claims 1-2.

Description

Automatic main steam temperature adjusting method and system and electronic equipment Technical Field The invention relates to the field of thermal power generation, in particular to a main steam temperature automatic adjustment method, a main steam temperature automatic adjustment method system, electronic equipment and a computer readable storage medium. Background At present, the main steam temperature of a thermal power plant unit is mostly regulated by forming a series regulating system by the main steam pipeline temperature and the superheated steam pipeline temperature at two sides respectively, regulating the temperature of a superheater through a temperature reduction water regulating door on the pipeline, and finally regulating the main steam temperature. Since each side of the two-side temperature regulating system is a series regulating system composed of the main steam temperature and the superheater temperature of the side, the main steam temperature and the superheater temperature of the two sides do not have any correlation, it is very difficult to thoroughly eliminate the deviation of the temperatures of the two sides. And excessive temperature deviations on both sides can directly cause the temperature of steam entering the turbine to approach or exceed the allowable steam temperature value of the turbine design. If the temperature is higher than the design working condition of the steam turbine, other operation parameters of the steam turbine, such as pressure, temperature, enthalpy drop, efficiency, reaction degree, axial thrust and the like of each stage, are changed, and the change of the parameters can influence the economy of the operation of the steam turbine and bring hidden trouble to the stable operation of the unit. And when the temperature is lower than the design working condition value, the circulation heat efficiency of the steam system is reduced, and under the condition of unchanged load, the main steam flow is increased, so that the wet steam loss of the steam turbine is increased, and the working efficiency of the steam turbine is reduced. Disclosure of Invention The embodiment of the invention aims to provide a method and a system for automatically adjusting the temperature of main steam and electronic equipment, which solve the problem of difficult operation when eliminating the deviation of the temperature of the main steam at two sides of a thermal power plant unit. In order to achieve the above object, the present invention provides a method for automatically adjusting the temperature of main steam, the method comprising: acquiring a first side main steam temperature, a first side superheater temperature, a second side main steam temperature and a second side superheater temperature of the thermal power unit; calculating a first temperature adjustment value according to the first side main steam temperature and the first side superheater temperature; calculating a second temperature adjustment value according to the second side main steam temperature and the second side superheater temperature; Calculating a temperature compensation value according to the first side main steam temperature and the second side main steam temperature; Correcting the first temperature regulating value and the second temperature regulating value according to the temperature compensation value to obtain a corrected first temperature regulating value and a corrected second temperature regulating value; The corrected first temperature adjustment value is used for adjusting the opening degree of the first side temperature reduction water valve of the thermal power unit, and the corrected second temperature adjustment value is used for adjusting the opening degree of the second side temperature reduction water valve of the thermal power unit. Preferably, calculating the first temperature adjustment value based on the first side main steam temperature and the first side superheater temperature includes: processing the main steam temperature at the first side and a preset temperature based on a first PID regulator to obtain a first regulating signal, wherein the preset temperature is a target value of the main steam temperature of the steam turbine during stable load; And processing the first regulating signal and the first side superheater temperature based on the second PID regulator to obtain a first temperature regulating value. Preferably, calculating the second temperature adjustment value based on the second side main steam temperature and the second side superheater temperature includes: based on a third PID regulator, processing the main steam temperature at the second side and a preset temperature to obtain a second regulating signal, wherein the preset temperature is a target value of the main steam temperature of the steam turbine during stable load; and processing the second regulating signal and the second side superheater temperature based on the fourth PID regulator to obtain a