Transformer plays an important role in power, electric, information and communication technology for large-scale distributed renewable energy power generation system. It is a sensor used in distributed and centralized renewable energy system.
Variable-frequency drive (VFD), using frequency conversion technology and microelectronic technology, controls alternating-current motor and power control equipment by changing motor operating frequency.
As industrial automation improves continually, VFD is extensively applied. Because VFD has an irreplaceable role in people’s production and living, it is imperative to run relative tests on it.
Due to the properties of VFD in terms of a huge amount of harmonics, high distortion and non-operating frequency electricity, large errors and even completely incorrect measurements will occur when measuring it with traditional meters. Instruments with Fast Fourier Transform (FFT) method should be used to get correct measuring results. VFD output fundamental and harmonic test is based on Fourier transform, and an essential condition to ensure Fourier transform accuracy is whole cycle truncation, which means Fourier transform should involve data corresponding to integral period. Most of the testing instruments on the market cannot achieve that, which leads to great fluctuation of measurements and unreliable measurement accuracy.
Our power analyzer and our current sensor used together can avoid the occurrence of the two above situations. Six sensors are distributed along the input/output side of the tested VFD for simultaneous high-speed data acquisition and the measurements are sent to the power analyzer by high-speed optical fiber bus in a lossless manner. The experimental data are thus generated.
Main Advantages
INNO's strong professional capabilities make its products more advantageous in related fields
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The FFT function allows you to set parameters such as the number of sampling points and sampling ratio to analyse the frequency spectrum of the input signal. This enables observation of frequency components that cannot be displayed in standard harmonic measurements.
Application Scenarios
In recent years as electrification becomes a new trend for new energy vehicle, dual-motor FWD system gets a lot of attention. In simple terms, it can be considered as providing two engines for a car and offering front-wheel and rear-wheel drive so that the car can have stronger acceleration.
