Condensate pump frequency conversion control method and device

A condensate pump, frequency conversion control technology, applied in the direction of pump control, liquid variable capacity machinery, machine/engine, etc., can solve the problems of large fluctuations in feed water flow, increased energy consumption of condensate pumps, and increased plant power consumption.

Active Publication Date: 2013-10-23
HENAN CHINA RESOURCES POWER GUCHENG
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Problems solved by technology

When the three impulses of the deaerator water level are used for adjustment, the feedwater flow fluctuates greatly during normal operation, and the three impuls...

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  • Condensate pump frequency conversion control method and device
  • Condensate pump frequency conversion control method and device
  • Condensate pump frequency conversion control method and device

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Embodiment Construction

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0035] See figure 1 , A flow diagram of a method for variable frequency control of a condensate pump provided by an embodiment of the present invention is applied to a variable frequency control system of a condensate pump. The system includes a condensate pump inverter, a motor, a condensate pump, and a deaerator, including:

[0036] Step 110: Collect the deaerator water level signal of the deaerator, and the PID controller outputs the inv...

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Abstract

The invention discloses a condensate pump frequency conversion control method and device, which are applied to a condensate pump frequency conversion control system. The system comprises a condensate pump frequency converter, a motor, a condensate pump and a deaerator. The method comprises the following steps: acquiring a deaerator water level signal of the deaerator, outputting a frequency converter instruction by a PID (Proportion Integration Differentiation) controller according to the deaerator water level signal and outputting the frequency converter instruction to the condensate pump frequency converter; outputting corresponding frequency by the condensate pump frequency converter according to the frequency converter instruction and outputting the frequency to a motor; and rotating the motor according to the frequency to control the condensate pump to convey condensate water into the deaerator. The conventional condensate pump frequency conversion adjustment is realized according to three impulses of the water level of the deaerator. According to the method provided by the invention, the three-impulse adjustment is changed into single-impulse adjustment, i.e., only the deaerator water level signal is acquired, and the frequency converter instruction is output by the PID controller according to the deaerator water level signal, so that the adjustment disturbance increased by a feed water flow and a condensate water flow can be reduced, the energy consumption of the condensate pump is reduced, and the station service power consumption rate is reduced.

Description

Technical field [0001] This application relates to the technical field of condensate pump frequency conversion control, and in particular to a method and device for condensate pump frequency conversion control of a condensing steam generator set. Background technique [0002] The condensate pump is an important power equipment of the condensate system. Its function is to send the condensate in the steamer into the deaerator. The condensate pump can be operated with frequency conversion, and the speed of the condensate pump is adjusted by frequency conversion to adjust the water flow of the deaerator. The traditional frequency conversion adjustment of the condensate pump is adjusted according to the three impulses of the water level of the deaerator. [0003] The three impulses of the deaerator water level are the deaerator water level, feed water flow, and condensate flow. When using the three-impulse of the deaerator to adjust the water level, the feedwater flow will fluctuate gr...

Claims

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Application Information

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IPC IPC(8): F04B49/06
Inventor 张茅
Owner HENAN CHINA RESOURCES POWER GUCHENG
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