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Unit load dispatching policy

A technology of unit load and scheduling method, applied in the direction of single-network parallel feeding arrangement, etc., can solve the problems of large useless power, increase power consumption of power plants, limit optimal operation of power grid, etc., and achieve the goal of improving economy and reducing power consumption rate of power plants Effect

Active Publication Date: 2011-11-16
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This will cause a "gap" control effect on the network dispatching AGC, and it will not be able to obtain a fast load response, which limits the optimal operation of the power grid and is one of the factors affecting the safe operation of the large power grid.
[0003] In addition, the existing scheduling strategy determines that when faced with a load breakpoint, the system must increase the load by starting a coal mill, which not only has the above-mentioned defects, but also increases the power consumption of the plant by about 1 ten thousand yuan / day
The coal mills of other units may be in a low-speed operation state, and the load lifting space is relatively large, but they cannot be used. On the contrary, because they are in a low-speed transportation state, the useless power is large, and the performance is much better.

Method used

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Embodiment Construction

[0022] The following further describes the technical solution of the present invention to enable those skilled in the art to better understand the technical solution of the present invention:

[0023] Unit load dispatching method, the power plant obtains the AGC command of the real-time control system of power grid dispatching, and then performs the following dispatch according to the load of each unit of the power plant:

[0024] 1) Calculate the difference e(k) between the AGC command and the load feedback of the target unit in real time, take k for the calculation step, and calculate the difference between e(k) and e(k-1) as Δe(k) to determine the load Up and down trend, this is convenient to determine whether the target unit should transfer to other units after the load is increased to the load breakpoint. If the current load is decreasing, it is necessary to determine whether to transfer to other units; and then:

[0025] 2) If e(k) is less than the upper limit of the set error,...

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Abstract

The invention discloses a unit load dispatching method. The method performs load dispatch of a plant level after a power plant receives an AGC command of a power grid dispatch in-time control system, so as to allow units to operate complementally and avoid load break points and to allow the power grid to increase and decrease load smoothly and achieve excellent operational safety and stability.

Description

(1) Technical field [0001] The invention relates to a unit load dispatching method, which is a power grid energy-saving dispatching method. (2) Background technology [0002] The current power grid dispatching real-time control system is based on the design capacity of the unit or the operating curve over a period of time, and you are based on the maximum load of the unit, without considering other factors. However, the large-capacity units newly installed in the country in recent years and the units to be installed in the next few years are almost all direct-blowing units. When this type of unit is put into AGC operation, there is a shortcoming, that is, there is a load break point. . That is, when the unit runs to a certain load point, a coal mill must be started or stopped. For the direct-blown pulverizing system, the coal feed rate of the boiler is controlled by the coal feeder. For large coal-fired units, the coal feed rate is generally equipped with a weighing belt, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
Inventor 孙玮王付生毕贞福孟祥荣王文宽
Owner STATE GRID CORP OF CHINA