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Load economical allocation control method based on flow balance

A technology of load economical distribution and flow balance, applied in the direction of total factory control, total factory control, electrical program control, etc., can solve problems such as the inability to guarantee the balance of supply and demand of local flow in the main pipe, difficult pressure in the main pipe, and increased fuel consumption.

Inactive Publication Date: 2009-02-25
SOUTHEAST UNIV
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Problems solved by technology

[0007] Technical problem: The purpose of the present invention is to provide an economical distribution control method based on flow balance group load, to solve the shortcomings of the existing main control unit load economic distribution method that cannot ensure the balance of supply and demand of the local flow of the main pipe and the resulting fuel consumption. A series of adverse effects on economy and safety such as increased consumption and difficulty in controlling the pressure of the main pipe

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  • Load economical allocation control method based on flow balance
  • Load economical allocation control method based on flow balance
  • Load economical allocation control method based on flow balance

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example

[0197] There are nine furnaces and six machines operating in parallel in the main pipe system of a thermal power plant in a petrochemical company. The boiler is a HG-220 / 100-10 pulverized coal boiler with a rated steam production of 220t / h (61.1kg / s), and the numbers are B1-B9 respectively; the rated steam consumption of the steam turbine is 220t / h (61.1kg / s ), numbered T1-T6. The coal consumption characteristic curve of the boiler is fitted by a quadratic polynomial, and the steam consumption characteristic of the steam turbine is approximately a straight line. The parameters are shown in Table 2 and Table 3 below.

[0198] Table 1 Traffic balancing group

[0199] balance group 1 B1 T1 B2 T2 B3 balance group 2 B4 T3 B5 T4 B6 balance group 3 B7 T5 B8 T6 B9

[0200] Table 2 Boiler coal consumption characteristic curve coefficient (steam flow unit is t / h, coal consumption unit is t / h)

[0201] boiler number a 0 a 1 a 2 ...

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Abstract

A load economic distribution control method based on a flow balance group is used for the economic distribution control of the load of a boiler and a stream turbine group in a piping-main scheme parallel operation mode, can be conveniently realized by supervising and controlling a two-stage computer system structure, and has the characteristics of good rapidity of distribution control, small pressure fluctuation of a main pipe, remarkable reduction of coal consumption and the like. When a control system in a piping-main scheme thermal power plant conducts load distribution on a parallel operation machine set, the control method comprises the following steps: (1) dividing a flow supply and demand balance group in the principle of proximity at the moment of each timing load distribution; (2) executing an overall situation load economic distribution task according to a given load demand at the moment of each timing load distribution; (3) judging whether a new lifting load demand appears or not in the stable operation process; (4) judging whether a malfunction and blowing-out signal appears or not in the operation process; (5) judging whether a malfunction and stopping signal appears or not in the operation process.

Description

technical field [0001] The invention relates to a load coordination and distribution control method for generating sets in a power station, in particular to an economical and coordinated distribution control method for loads of generator sets operating in parallel under parent control. Background technique [0002] At present, the self-provided power plants in my country's petroleum, chemical, papermaking, printing and dyeing industries are mainly thermal power plants. Due to the large amount of steam consumed in the production process, most of these self-provided power plants adopt the parallel operation mode of parent control. According to incomplete statistics, my country's existing There are more than 2,000 power plants under parent control. my country's power industry management system is gradually introducing a competition mechanism, and energy conservation and consumption reduction has become one of the important factors to reduce power production costs. For units ope...

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Application Information

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IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 潘蕾沈炯
Owner SOUTHEAST UNIV
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