Unit load dispatching policy

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 scheduling method, which is an energy-saving scheduling method for a power grid. (2) Background technology [0002] At present, the real-time control system of power grid dispatching is based on the design capacity of the unit or the operation curve within a period of time, and you are based on the maximum load of the unit without considering other factors. However, most of the large-capacity units newly launched in China in recent years and the units to be launched 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 breakpoint. . That is to say, 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 to the boiler is controlled by the coal feeder. For large coal-fired units, it is generally equipped with a weighing belt to ...

AI Technical Summary

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.