image thumbnail

Universal Electronic Load Controller(ELC) for MicroHydro plant

version 1.10.0.0 (41.4 KB) by Niranjan Bhujel
It regulates speed of the generator, compensates reactive power and mitigates harmonics in current.

1K Downloads

Updated 30 Mar 2017

View License

In microhydro plant, speed governer is not used because of its high cost. ELC is preferred. This ELC regulates speed, compensates reactive power and mitigates current harmonics.
It senses deviation in speed, then calculates power to be dumped(Pdump). Then, it senses load current and voltage from which p and q is calculated(pq theory). Then oscillating part of p (say p1) is found using digital filter. To compensates reactive power and mitigate current harmonics, p1 and q should be injected. To regulate speed, Pdump should be drawn. So, net power p1-Pdump is to be injected along with q. With this value, current to be injected is calculated. This reference current is fed to hysteresis band current controller which generates gate signal for inverter. Inverter injects the current.
Pdump drawn charges the capacitor C1 and C2. So, voltage across them increases. When sum of their voltage exceeds certain value (1025 V in this case), MOSFET switch S is turned on. So, capacitor is discharged to resistor. In this way, power is dumped in resistor.

Cite As

Niranjan Bhujel (2021). Universal Electronic Load Controller(ELC) for MicroHydro plant (https://www.mathworks.com/matlabcentral/fileexchange/61937-universal-electronic-load-controller-elc-for-microhydro-plant), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2016b
Compatible with any release
Platform Compatibility
Windows macOS Linux
Communities

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!