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A method for optimizing sliding pressure operation of a heating unit and a control system for sliding pressure operation

A sliding pressure operation, heating unit technology, applied in general control systems, control/regulation systems, program control and other directions, can solve the problems of inaccurate steam flow measurement, inability to calculate thermal economy indicators, etc., to achieve convenient promotion and practicality. High flexibility and operability, and the effect of improving control accuracy

Active Publication Date: 2021-05-07
CHINA DATANG CORP SCI & TECH RES INST CO LTD EAST CHINA BRANCH +1
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Problems solved by technology

At present, the main steam flow measurement of most power plants is not accurate, and cannot be used for thermal economic index calculation and optimal operation calculation

Method used

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  • A method for optimizing sliding pressure operation of a heating unit and a control system for sliding pressure operation
  • A method for optimizing sliding pressure operation of a heating unit and a control system for sliding pressure operation
  • A method for optimizing sliding pressure operation of a heating unit and a control system for sliding pressure operation

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Embodiment Construction

[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0042] This embodiment provides a method for optimizing sliding pressure operation of a heating unit, including the following steps:

[0043] Step A: Taking the lowest heat rate of the unit as the optimization goal, conduct experiments under different main steam flow rates and main steam pressures to obtain the relationship between the main steam flow rate and the optimal main steam pressure of the unit;

[0044] The power consumption of the feed water pump of the heating unit, the heat absorption of the furnace side, the relative internal efficiency of the high-pressure cylinder, and the heat absorption of the reheated steam are mainly determined by the steam flow rate and the main steam pressure. When the main steam flo...

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Abstract

The invention provides a method for optimizing sliding pressure operation of a heating unit, which includes the following steps: respectively obtaining the relationship between the main steam flow rate and the optimal main steam pressure, and the unit electrical load and The relationship between the main steam flow is calculated and processed to obtain the relationship between the electrical load of the unit and the optimal main steam pressure, and is used for sliding pressure operation. The present invention further provides a control system for sliding pressure operation using the optimized sliding pressure operation relationship. The advantages of the sliding pressure operation optimization method and the sliding pressure operation control system of the heating unit provided by the present invention are: without changing the existing In the case of DCS sliding pressure control curve type, different sliding pressure curves are used for operation control of different heating flows, so that the operating economy of the unit can be finely managed; and the control accuracy is further improved by introducing back pressure correction; The sliding pressure operation optimization method has strong practicability and operability, and is convenient for implementation and promotion.

Description

technical field [0001] The invention relates to the technical field of operation optimization of heating units in thermal power plants, in particular to a method for optimizing sliding pressure operation of heating units and a control system for sliding pressure operation. Background technique [0002] As the demand for electricity continues to grow, the requirements for the peak-shaving capability of the units are increasing, and thermal power units are faced with a large-scale peak-shaving operation. In order to ensure the operating efficiency of the unit and meet the growing demand for industrial steam, the state has issued policies to encourage and develop cogeneration of heat and power, and various types of heating units have increased year by year. For large thermal power units, the main form of heat supply is heat supply from the steam extraction port of the steam turbine. [0003] At present, the sliding pressure operation mode commonly used by heating units takes t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418F01D21/00F01K17/02
CPCF01D21/00F01D21/003F01K17/02G05B19/41845G05B2219/33273Y02P90/02
Inventor 邵飞张宁蒋寻寒阮圣奇吴仲陈开峰胡中强蒋怀锋任磊吴剑朱涛宋勇
Owner CHINA DATANG CORP SCI & TECH RES INST CO LTD EAST CHINA BRANCH
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