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Power plant circulating water pump motor two-speed transformation method

A technology for circulating water pumps and power plants, which is applied in the manufacture of motor generators, electrical components, electromechanical devices, etc. It can solve problems such as good results and large differences in the operating conditions of circulating water pumps, and achieve low investment costs, obvious energy-saving effects, and economic benefits. high effect

Inactive Publication Date: 2015-02-04
STATE GRID CORP OF CHINA +1
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AI Technical Summary

Problems solved by technology

Although the overall energy-saving effect is not as good as that of the frequency conversion transformation, due to the large difference between the operating conditions of the circulating water pump in the hot season and the cold season, the two-speed transformation can still achieve good results by switching between the hot season and the cold stage. Effect

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  • Power plant circulating water pump motor two-speed transformation method
  • Power plant circulating water pump motor two-speed transformation method
  • Power plant circulating water pump motor two-speed transformation method

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Embodiment Construction

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0015] In the embodiment of the present invention, the two-speed transformation method of the circulating water pump motor of the power plant is based on the formula of the rotating speed of the circulating water pump motor: It can be seen that the speed n of the circulating water pump motor is inversely proportional to the number of pole pairs p of the circulating water pump motor, so changing the number of poles of the circulating water pump motor can change the speed of th...

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Abstract

The invention discloses a power plant circulating water pump motor two-speed transformation method. A group of B phase CT and secondary wiring of B phase CT is added, and the wiring mode of a winding in a circulating water pump motor is changed through switching of a transfer switch. According to a stator winding, the 16-th pole serves as the basis pole, that is, the stator winding is in star connection during high-rotation-speed running, and the stator winding is in triangular connection when running at the 18-th pole rotation speed, that is, running in a low rotation speed. By the aid of the method, the economic benefit is high, the energy-saving effect is apparent, and the method can be popularized and applied in related power plants and similar enterprises in the transformation of certain specific circulating water pump motors due to the low investment cost and little post maintenance.

Description

technical field [0001] The invention relates to a motor, in particular to a dual-speed transformation method for a circulating water pump motor in a power plant. Background technique [0002] Taking a power plant as an example, there are two 660MW units in total, and each unit is equipped with two circulating water pumps. The model of the circulating water pump motor is YKSL3360-16 / 2150-1, and the motor is rated at 3300KW. The operation mode of the circulating water system is designed in three working conditions: one unit and two circulating water pumps operate in parallel in the hot season, and one unit and one pump operate in the cold season. Two machines and three pumps run in spring and autumn. However, because the specification of the intermediate connecting door of the two water delivery main pipes of the two units is too small, only Dg1400, when the two machines and three pumps are running, the resistance of the intermediate connecting door is too large, so that the ...

Claims

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Application Information

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IPC IPC(8): H02K3/28
CPCH02K15/0068H02K3/28
Inventor 李庆邓红英梁瑞生方益秋平莉熊忠
Owner STATE GRID CORP OF CHINA
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