Power System Studies

Power Quality Study

Diagnose what's tripping your VFDs. Quantify what's killing your batches.

Voltage sags trip drives. Harmonics overheat motors. Flicker fails GMP audits. Imbalance starves three-phase loads. A power quality study isolates which one is your problem, quantifies severity per IEEE 519 and IEC 61000, and engineers the mitigation · all signed off by a Chartered Engineer.

Why this matters

Why power quality is the silent killer of brownfield plant uptime

When a batch fails or a line stops, the operator blames the drive. The drive vendor blames the controls. The controls vendor blames the protection settings. Everyone is right · because none of them has measured the supply. A power quality study installs class-A IEC 61000-4-30 instrumentation at the right buses for the right duration, captures the full spectrum of voltage and current anomalies, and tells you exactly which phenomenon is causing the failure · harmonics, sag, swell, flicker, imbalance, or transient. From there the mitigation is engineering · active filters, line reactors, dynamic voltage restorers, sag conditioners, or upstream contracts with the utility. Until you measure, every fix is a guess.

Method

How we deliver Load Flow Analysis

CEng MIE India-signed deliverables · LiDAR-powered where applicable · digital twin handover ready · routes to the Power System Studies practice lead within 24 hours.

Measurement campaign

Class-A IEC 61000-4-30 power quality analysers installed at PCC, MCC, and critical-load buses. Minimum 1-week continuous capture covering at least one full production cycle. Voltage, current, harmonic spectrum, flicker, dip-swell catalogued.

Data analysis

Capture compared against IEEE 519, IEC 61000-2-2, EN 50160. Each anomaly categorised (waveform distortion vs amplitude variation vs short-duration event). Origin localised (upstream utility vs downstream load).

Root-cause isolation

Cross-correlation between measurement bus and DCS/PLC alarm log to map each anomaly to a production event. VFD-tripping waveform fingerprinted, batch-failure timestamp matched to sag signature.

Mitigation engineering

Per-phenomenon mitigation sized · active harmonic filters, line reactors, K-rated transformers, dynamic voltage restorers, static VAR compensators, surge protection. Each option compared on capex, response time, and effectiveness.

Sign-off + utility liaison

Report signed by a Chartered Engineer. If utility-side mitigation is recommended, we author the utility liaison letter quantifying the contract violation and engineering options for resolution.

Standards + compliance

Built to the standards your auditors quote

Reports reference the international and national standards your regulators, F500 audit teams, and corporate process safety leads cite. Every deliverable signed by a Chartered Engineer (CEng MIE India).

IEEE 519 · Harmonic Control in Electric Power Systems
IEC 61000-2-2 · Compatibility levels for low-frequency conducted disturbances
IEC 61000-4-30 · Power quality measurement methods (Class A)
EN 50160 · Voltage characteristics of electricity supplied by public distribution
IS 16100 (India) · Power Quality Standards · BIS

Anonymous case anchors

What this looks like in production

Three landmark engagements from our verified roster · quantified outcomes, no client names disclosed without written permission.

Pharma site, India · GMP cleanroom

Class-A capture isolated 30-cycle voltage sag from upstream utility as root cause of 14 batch failures in Q2. Engineered dynamic voltage restorer sized 800 kVA · batch failures fell from 14/quarter to zero.

Steel plant, USA · EAF furnace

Harmonic + flicker study under EAF operation. THD measured 11.4% at 33 kV PCC vs IEEE 519 limit 5%. Sized active filter + STATCOM combination · paid back in 14 months on demand charge reduction.

Data centre, UAE · Tier III

PQ audit before commissioning. Caught residual neutral current from triplen harmonics. Resized neutral conductor + grounded delta-wye transformer · pre-empted thermal failure in first summer.es. Identified 5.8% voltage violation at remote MCC during compressor startup. Recommended on-load tap-changer retrofit.

Frequently asked

Load Flow Analysis · the practical questions

How long does a typical load flow study take?

A standalone load flow on a single 132 kV substation: 3-4 weeks. A full plant-wide study (220 kV down to 415 V) with N-1 contingencies: 6-10 weeks. LiDAR-assisted as-built verification adds 1-2 weeks but de-risks model accuracy.

Can you work with my existing ETAP / DigSILENT model?

Yes. We routinely take over legacy models, audit them against current field reality (via LiDAR), and re-baseline. About 60% of our load flow engagements start from an existing model.

Do you provide the ETAP / DigSILENT software, or do we need a licence?

Both options. We can deliver on our licences and hand over a PDF + DWG report, or we can build in your environment so your team retains the live model. The handover model + report is yours regardless.

What's the link between load flow and your digital twin offering?

The verified network model from a load flow study is the electrical layer of the Wistwin digital twin. We hand it over as a structured model that ingests directly · saving 4-6 months of digital twin foundation work.

Are your reports accepted by international F500 audit teams?

Yes. Our reports are signed by Chartered Engineers (CEng MIE India), reference IEEE / IEC / NFPA / NEMA standards, and have been accepted in audits by Bayer, Pfizer, TATA, Adani, JSW, and others on our verified roster.

Scope your Load Flow Analysis engagement.

Tell us your plant, region, and scope · a named Chartered Engineer responds within 24 hours.

4 fields. No phone interview to start.
Per-discipline routing to the Power System Studies practice lead.
Anonymous case anchors sent with first reply.
Same-day callback for deadline-driven enquiries.

Power System Study Scoping

ETAP/DigSILENT/PSCAD-led · routes to Practice Lead PSS · 24-hour response.