Correction Rectifier, Compensation of Power Grid Feedback
   | Based on our decades-proven HSG Technology (HECON Sine Wave Gleichrichter / Rectifier), we have developed correction rectifiers that compensate negative feedback on the power grid. The three oscilloscope pictures show, in the top image, the current waveform (yellow curve) of a thyristor rectifier at a large phase angle (start-up or reduced power). The middle image shows a high power setting, revealing the 120°el current blocks typical of thyristor rectifiers. The bottom image shows the corrected sinusoidal waveform within the set tolerance limits with a slightly inductive phase angle. Tolerance limits for the current waveform deviation and phase angle are adjustable. The light green curve shows the mains voltage waveform at the feed point. Normally, the correction rectifier works from start, for clarity, in these pictures the intervention was activated with a delay. Our correction rectifiers are modular and designed for parallel connection to get any high power outputs. They can be retrofitted to existing systems. The selection of a suitable solution is made taking into account the specific on-site conditions. |
Passive Mains Filter made of inductors and capacitors for reducing harmonics have two disadvantages and are therefore rarely, if ever, used anymore:
- Additional energy storage is added to a network already burdened with harmonics. Experience shows that this creates the risk of additional resonances, which can overload the components involved and destroy them through overheating. Therefore, careful testing is required before using a passive filter.
- • A passive mains filter cannot adapt to future changes in the power supply network.
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