Minimum power consumption variable-frequency energy-saving control method for pumping station
An energy-saving control and minimal technology, applied in pump control, liquid variable displacement machinery, machine/engine, etc., can solve problems such as unsatisfactory energy-saving effect, achieve the effect of improving energy-saving effect, and facilitating judgment and operation
Inactive Publication Date: 2011-02-16
LUOHE HENGYIDA ELECTRIC EQUIP
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[0004] The purpose of the present invention is to provide a pumping station minimum power consumption frequency conversion energy saving control method to solve the problem that the energy saving effect of the existing pumping station frequency conversion energy saving control method is not ideal
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[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0016] Such as figure 1 A tap water pumping station system is shown. The maximum daily water supply of the tap water pumping station is 20,000 tons. The pumping station is equipped with 2 auxiliary pumps, each with a power of 75KW and a rated flow of 300m 3 / h, rated head 60m, one for use and one for standby; additionally equipped with 2 main pumps, single power 132KW, rated flow 500m 3 / h, rated head 60m, one for use and one for standby. No. 1 pump 1P and No. 3 pump 3P are controlled by frequency converter, No. 2 pump 2P and No. 4 pump 4P are controlled by soft starter. Corresponding to each pump, there are 1P frequency conversion cabinets, 2P soft start cabinets, 3P frequency conversion cabinets, 4P soft start cabinets, and one incoming line cabinet and one automation cabinet. The incoming line cabinet is equipped with a total effective power meter KWz, 4...
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The invention relates to a minimum power consumption variable-frequency energy-saving control method for a pumping station, which comprises the following steps: firstly determining various possible independent or combined running modes of a water pump according to the configuration of the water pump of the pumping station, then further establishing characteristic flow rate of the pumping station-minimum power consumption power-running mode database by detecting and determining power consumption power under various types of set characteristic flow rate, finally detecting the instantaneous flowrate Qt of the pumping station and the instantaneous power consumption power Pt of the pumping station every sampling cycle delta T when the pumping station runs, calculating the minimum power consumption power Pt0 which corresponds to the instantaneous flow rate Qt according to the database, further calculating the deviation between the Pt0 and the Pt, and switching the running mode of the pumping station to the running mode which corresponds to the closest characteristic flow rate which is larger than the current instantaneous flow rate in the minimum power consumption database when being outside the allowable deviation range. The method is intelligent and quantifiable, and can not only greatly improve the energy-saving effect of running of the pumping station, but also facilitate judgment and operation of operation staff.
Description
technical field [0001] The invention relates to a minimum power consumption frequency conversion energy-saving control method for a pumping station. Background technique [0002] As a general-purpose machine, water pumps are widely used in various sectors of the national economy. The power consumption of water pumps accounts for a huge proportion of the total electricity consumption in society, accounting for about 20-25% in the world and about 21% in my country. my country's pumping station projects are in the forefront of all countries in the world in terms of their scale and quantity, but many pumping station projects generally have problems such as low efficiency, large energy consumption, and low level of automation. With the emphasis on energy saving and emission reduction, the energy saving transformation of pumping stations has also attracted much attention. [0003] In the current energy-saving transformation of pumping stations, frequency conversion speed regulatio...
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Inventor 李永刚常红星郭丽丽
Owner LUOHE HENGYIDA ELECTRIC EQUIP