Abstract
Frequency control technology can achieve the purpose of energy saving of power equipment, but also bring problems of harmonic loss formula. The relationship between the loss rate and load rate is constituted by formula derivation, and calculate the load rate when the loss rate is the minimum and the total power of power-consuming devices. Then design the digital PID controller and research the power-saving optimization feedback algorithms and design the software process. Finally, carry out the inverter switching algorithm based on ABB ACS510 low voltage inverter.
Highlights
With the continuing development and application of frequency conversion speed regulator, a large number of convertors are used to control the fan and pump load in industrial and civil fields in order to achieve variablespeed energy-saving operation which bring considerable economic benefits [1,2,3]
Frequency control technology can achieve the purpose of energy saving of power equipment, and bring problems of harmonic loss formula
The relationship between the loss rate and load rate is constituted by formula derivation, and calculate the load rate when the loss rate is the minimum and the total power of power-consuming devices
Summary
With the continuing development and application of frequency conversion speed regulator, a large number of convertors are used to control the fan and pump load in industrial and civil fields in order to achieve variablespeed energy-saving operation which bring considerable economic benefits [1,2,3]. The harm of harmonics is quite serious, including reducing the reliability of power supply, decreasing the effective capacity of the system, affecting the operating of the devices, making the electromagnetic environment deteriorative and resulting in the increase of the power system losses. The additional loss which generate by harmonic will increase the total power loss of power supply and distribution system. The additional loss of the power system generated by harmonic counteracts with part energy which saved by frequency conversion speed regulator. Some literatures just research the harmonic power loss of each device, such as motor and transformer. There is no qualitative and quantitative research about the problems of frequency conversion energy saving with considering the harmonic power loss
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