IEEE 1584 · Engineering
Harmonic Study and Analysis in Italy | Carelabs Experts
Power factor correction capacitors, if not sized and placed correctly, can shift a system's resonant frequency toward a harmonic already present from nonlinear loads — turning a power-factor fix into a new harmonics problem. Carelabs' harmonic studies for Italian facilities model system impedance versus frequency to check for this risk before or after a power-factor correction project, and recommend relocating or adjusting capacitance where needed. Every engagement concludes with a CEI 64-8-aligned report package.
Free ConsultationYour position at the point of delivery
Harmonic current injected into the distributor's network is a matter between your installation and the operator. CEI 0-16 governs the connection of users to MV networks, and distortion is part of what that relationship covers.
What We Deliver
Compliance assessed where it applies
Measurement is taken at the point of delivery, because that is the boundary at which emission is assessed. Distortion recorded at an individual drive panel will look alarming and establishes nothing about your position.
WHY IT MATTERS
The problem arrives after a change
Harmonic failures rarely develop gradually. They appear when something moves the resonant point: a new capacitor stage, a transformer replacement, or a reinforcement by the distributor that strengthens the supply.
- Measurement logged across a representative operating period, since distortion follows load and a single snapshot answers the wrong question.
- Voltage and current distortion both reported, because one describes what your plant experiences and the other what you are injecting.
- Demand-referenced current distortion used for the compliance position, as distortion expressed against instantaneous current rises at light load even when nothing has changed.
- Transformer derating assessed where distortion is significant, since eddy current losses rise sharply with harmonic order and consume capacity already paid for.
- Neutral loading checked on four-wire distribution, because triplen harmonics add rather than cancel and can exceed phase current in a conductor sized on the opposite assumption.
DELIVERABLES
What you receive
Issued against CEI 64-8 and the distortion limits applicable at your connection, with the measurement basis stated.
- 1Measured voltage and current distortion at the point of delivery, with the full spectrum
- 2Assessment against the limits applicable to your connection, with the basis of each limit stated
- 3Attribution by feeder showing which loads produce which harmonic orders
- 4Frequency scan identifying resonance points and the margin to each
- 5Mitigation options compared: line reactors, DC link chokes, tuned filters, active filters or detuning
How the study runs
Establish the driver
We agree whether the work supports a connection or capacity application, diagnoses recurring failures, or clears a planned load addition before purchase.
Fix the measurement points
The point of delivery is established first for the compliance position, with feeder points added where attribution is needed.
Log a representative period
Measurement covers the real operating cycle, including start-up and the low-load periods when capacitor stages switch and behaviour changes.
Model and scan
The network is built in ETAP and a frequency scan locates resonance, which governs which mitigation is safe and which would make matters worse.
Assess and attribute
Results are compared against applicable limits and the spectrum is used to identify responsible loads, so treatment is directed rather than applied broadly.
Report and options
Each mitigation option is presented with what it addresses and what it does not, so source-side and busbar-side treatment can be compared honestly.