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Steam Turbine Optimal Adjustment Method

An adjustment method and steam turbine technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve the distortion of the actual effect of the steam turbine, without considering the coupling between the steam inlet and exhaust ends of the steam turbine, and the influence of the optimized combination of circulating water pumps on the operating performance and other issues to achieve the effect of strong operability, convenient operation and enhanced operational reliability

Active Publication Date: 2022-05-13
GUODIAN NANJING ELECTRIC POWER TEST RES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. There is a coupling effect between the main steam pressure and the exhaust steam pressure of the steam turbine, which leads to the mutual influence on the operating performance of the unit sliding pressure operation and the optimized combination of the circulating water pump
However, traditional steam turbine optimization test methods do not take this effect into account
At present, most of the experiments are carried out separately on the optimization of unit sliding pressure and the combination of circulating water pumps. Although some theoretical studies have considered the influence of exhaust pressure on the optimal operation of sliding pressure, or the influence of unit state changes on the combined optimal operation of circulating water pumps, they have not considered The combination of the two for overall optimization failed to maximize the optimal operation potential of the steam turbine, resulting in the fact that the operating economy of the steam turbine still did not reach the optimal state
[0005] 2. When the traditional steam turbine optimization test method is implemented, the sliding pressure optimization test or the circulating water pump optimization combined operation test are carried out separately, and then the separate sliding pressure optimization curve and the single circulating water pump optimal operation operation card are given.
Since the traditional test method does not consider the coupling between the inlet and exhaust ends of the steam turbine, when the above two operation cards given by the traditional test results are used for operation, the main steam pressure parameter and the exhaust pressure of the unit will appear when the unit is running. The parameters do not match, and the operators need to adjust the operating parameters repeatedly, which affects the stable operation of the unit and also leads to the distortion of the actual effect of the traditional optimization test of the steam turbine

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Experimental program
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Effect test

Embodiment 1

[0035] In this embodiment, a steam turbine optimization adjustment method of the present invention is implemented on a direct air-cooling unit, and the method includes:

[0036] 1) Retrieve the historical operation data of the past 2 years from the DCS system of the direct air cooling unit, collect the atmospheric temperature data and unit load data, and then form the unit load range [P min ,P max ] and the atmospheric temperature range interval [T min ,T max ]; among them, P min is the lowest unit load in the unit load data, P max is the highest unit load in the unit load data; T min is the lowest atmospheric temperature in the atmospheric temperature data, T max is the highest atmospheric temperature in the atmospheric temperature data;

[0037] 2) According to the unit load range interval and the atmospheric temperature range interval, respectively set the unit load test point set P = [P min ,P min +20% (P max -P min ),...,P max -20% (P max -P min ), P max ] a...

Embodiment 2

[0049] In this embodiment, a steam turbine optimization adjustment method of the present invention is implemented on a circulating water cooling unit, the method comprising:

[0050] 1) The historical operation data of the past 3 years is retrieved from the DCS system of the circulating water cooling unit, and the temperature data of the circulating water inlet and the load data of the unit are collected, and then the load range interval of the unit is formed [P min ,P max ] and circulating water inlet temperature range [T min ,T max ]; among them, P min is the lowest unit load in the unit load data, P max is the highest unit load in the unit load data; T min is the lowest circulating water inlet temperature in the circulating water inlet temperature data, T max is the highest circulating water inlet temperature in the circulating water inlet temperature data;

[0051] 2) According to the load range interval of the unit and the temperature range of the circulating water ...

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Abstract

The invention discloses an optimization adjustment method for a steam turbine. According to the set set load test point set and cooling medium temperature test point set, the method performs an optimization adjustment test to obtain the best main steam pressure and cooling system under different operating conditions. The optimal combination mode, the unit operator can adjust the combination mode of the cooling system according to the unit load and the temperature of the cooling medium in the actual operating condition, and set the main steam pressure to realize the optimal operation of the steam turbine. Compared with the traditional optimization test of steam turbines, the method of the invention makes the operation more convenient for unit operators, has strong operability and enhances the reliability of operation.

Description

Technical field: [0001] The invention relates to a steam turbine optimization adjustment method, which belongs to the technical field of steam turbine generator sets. Background technique: [0002] At present, steam turbines are often in low-to-medium load operating conditions, which greatly deviates from the design conditions and greatly affects the operating economy of the steam turbine system. At present, the optimal operation of steam turbines is mainly explored through test methods, and then the actual operation of the unit is guided. Therefore, further in-depth research on the optimization and debugging test methods of steam turbines is very important to improve the economic operation level of steam turbines. [0003] The traditional optimal operation test methods of wet-cooled steam turbines are mainly sliding pressure optimal operation tests and circulating water pump optimal combined operation tests, which fail to maximize the optimal operation potential of steam tu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D21/00F01D17/00F01D15/10
CPCF01D21/00F01D21/003F01D17/00F01D15/10
Inventor 徐星
Owner GUODIAN NANJING ELECTRIC POWER TEST RES CO LTD