Condensate pump frequency conversion control method and device

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

Active Publication Date: 2016-06-08
HENAN CHINA RESOURCES POWER GUCHENG
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  • Claims
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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 impulses may introduce disturbances into the main tune, which will increase the energy consumption of the condensate pump and increase the power consumption rate of the plant

Method used

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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 following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0035] see figure 1 , a schematic flowchart of a frequency conversion control method for a condensate pump provided by an embodiment of the present invention, which is applied to a frequency conversion control system for a condensate pump. The system includes a frequency converter for a condensate pump, a motor, a condensate pump, and a deaerator, including:

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

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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] The present application relates to the technical field of frequency conversion control of condensate pumps, in particular to a method and device for frequency conversion control of condensate pumps in condensing steam generator sets. Background technique [0002] The condensate pump is an important power equipment of the condensate system, and its function is to send the condensate in the steamer to the deaerator. The condensate pump operates with variable frequency, and the water volume of the deaerator is adjusted by adjusting the speed of the condensate pump through frequency conversion. 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 water level of the deaerator are the water level of the deaerator, the flow rate of the feed water, and the flow rate of the condensed water. When the three impulses of the deaerat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/06
Inventor 张茅杨保
Owner HENAN CHINA RESOURCES POWER GUCHENG
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