An overkill of solar installation. Wasted capital investment. Poor planning and study of requirement.

We had the opportunity of studying and analyzing the issues of power quality in one of the railways division. The installation reflects how resources are wasted due to improper planning and power study prior it Installation of this 900KW solar installation.

Some of the serious issues faced by the railways are the following:

1.?????? Excess and a overkill of solar generation 900 KW when the total load is only 280KW.

2.?????? No facility for export of solar energy or storage.

3.?????? High Harmonics generated max 99%, especially when there is clouding, consequently heating of transformers due to harmonics (Power quality and RF range)

4.?????? Power factor oscillation from leading PF pf -0.36 to lagging 1.

5.?????? APFC not in working condition and Hence manually operated. Which can cause harmonic resonance, which could harm the electrical system and all equipments connected to it.

6.?????? No Harmonics Mitigation technique implemented prior to adding solar.

7.?????? The string Inverters shut down when there is excess generation. Precious energy wasted

We are reproducing some of the data recorded for the readers, to create awareness how design power study and power quality planning? is critical for Distributed energy resources Installation (DER) for successful installation of solar Plants.

RMS CURRENT:

VARIATION OF POWER FACTOR AT SOLAR WORKING CONDITION:

INCREASE OF HARMONICS WHEN INTERMITTENT CLOUDING & SOLAR INJECTION:

VIDEO LINK:

https://www.youtube.com/shorts/hwi-F26aTHE?feature=share

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1. WAVEFORMS TERMINATOR - ADVANCE PASSIVE HARMONICS FILTER.
2. WAVEFORMS HYBRID HMT - HARMONICS MITIGATION TRANSFORMER.
3. WAVEFORMS SINEWAVE FILTER - SINE FILTER FOR OUTPUT SIDE OF VFD.
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