Power System Studies

Load Flow Analysis

Steady-state voltage, current, and power flow analysis for brownfield plants.

Power flow at every bus, voltage drop on every feeder, kVAR demand on every PCC. Modelled in ETAP or DigSILENT, signed off by a Chartered Engineer, delivered with an SLD-as-Code handover to your digital twin.

Why this matters

Why every brownfield plant needs a current load flow study

Plant loads drift. Motors get added, transformers age, capacitor banks fail, harmonic filters degrade. The single-line diagram on the wall is rarely the single-line in the field. A current load flow study reconciles the two, identifies undersized cables, flags transformers approaching nameplate, and quantifies the kVAR shortfall driving your demand penalties. Every refinery, every steel plant, every pharma site we touch starts here. Without an accurate load flow baseline, every downstream PSS deliverable · short circuit, coordination, arc flash, stability · inherits the gap.

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.

Data acquisition

LiDAR-assisted as-built SLD verification, transformer + cable + motor nameplate capture, protection settings extraction, harmonic measurement campaign (where required).

Model build

ETAP or DigSILENT model authored from verified data. Network topology validated against your DCS/SCADA. Load profiles applied per operating case (normal, summer peak, monsoon, startup, emergency).

Scenario sweep

Minimum 6 operating cases run. Voltage profile at every bus, current loading on every cable, kVAR demand at every PCC tabulated. Contingency cases (N-1) included by default.

Findings + recommendations

Undersized assets flagged, voltage drop violations isolated, kVAR correction sizing computed, transformer headroom for next 5-year capex quantified. Findings tied to IEEE 399 / IEC 60909 / NEMA MG-1 acceptance criteria.

Sign-off + handover

Report signed by a Chartered Engineer (CEng MIE India). ETAP/DigSILENT model handed over with annotated SLD, ready for digital twin ingest.

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 399 (Brown Book) · Industrial and Commercial Power System Analysis
IEC 60909 · Short-circuit currents in three-phase a.c. systems
NFPA 70E · Workplace Electrical Safety
NEMA MG-1 · Motors and Generators
IS 12360 / IS 12360-1 (India), IEEE C57 series (USA), IEC 60076 (international transformer ratings)

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.

Refinery, India · 220 kV → 33 kV

Modelled 412 buses, 89 transformers, 1,800 motors. Identified 14 undersized feeders, sized 14 MVAR capacitor bank. Demand penalty avoidance eight-figure/year.

Pharma site, USA · Texas Gulf Coast

ETAP model rebuilt from LiDAR + DCS export. Flagged 3 transformers at 92% nameplate. Pre-empted Q4 expansion-driven overload.

Petrochem, KSA · 132 kV import

DigSILENT load flow with 8 operating cases. 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.