Type selection method for static load interval input of emergency security diesel engine in thermal power plant

Abstract

The invention discloses a thermal power plant emergency security protection diesel engine static and dynamic load alternate switching-in model selection method. The method includes the following steps that: alternating current security protection loads are divided into a plurality of batches according to the capacity of the alternating current security protection loads, wherein each batch contains static loads or rotary loads; the static loads and the rotary loads are switched in alternately; calculation is performed according to the switching-in batches of the alternating current security protection loads, and calculated load capacity is obtained, and generator capacity is selected according to the calculated load capacity of the alternating current security protection loads; and after the generator capacity is selected, the output power of a diesel engine is re-checked, and a diesel generator set of a final capacity is selected. The static loads and rotary loads in each batch of the security protection loads are separated from each other, processed differentially, and are switched in alternately, and therefore, initial loading ability restricting diesel engine capacity selection is controlled, and therefore, the capacity of the diesel engine can be selected reasonably; and the number of the batches of the switched-in alternating current security protection loads is increased, and impact on the diesel generator can be decreased, and equipment operation can be benefitted.

Description

technical field [0001] The invention relates to the technical field of diesel engine capacity selection, in particular to a type selection method for emergency security diesel engines at static load intervals in a thermal power plant. Background technique [0002] At present, in the design of thermal power projects in China, AC security loads are mostly input in three batches, and the same batch of loads includes both rotating loads and static loads. [0003] The AC security load of the thermal power plant mainly involves some auxiliary machines of the three major main engines and some auxiliary machines of the soda water system, pulverizing system, flue gas system, and desulfurization system. In addition, there are a small number of thermal automation valves, thermal control power supplies, Part of the low-voltage load of the fire protection system, as well as the electrical professional's own battery charging device, UPS power supply, emergency lighting, obstacle lighting,...

AI Technical Summary

Problems solved by technology

[0005] In the engineering design, due to the lack of in-depth research on the characteristics of the AC security load, the definition of the AC security load, and the investment in the AC security, the selection of the capacity of the diesel generator set is too large, the expansion of the AC security load power supply range, and the AC security load. Problems such as unreasonable investment time often appear. How to optimize the input of AC security load in thermal power plants has become a problem that needs to be solved in the project

[0006] To sum up, there is still no effective solution to the problem of diesel generator capacity selection in the prior art

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