Power System Studies

Renewable Integration Impact Study

Integrate solar, wind, or BESS without destabilising the brownfield network.

Adding a 10 MW solar plant to a 50 MW brownfield network changes everything. Fault levels, protection coordination, power quality, voltage profile, anti-islanding. We model the full impact in ETAP and DigSILENT, engineer the interconnection, and certify grid-code compliance · all signed by a Chartered Engineer.

Why this matters

Why renewable integration breaks brownfield protection without redesign

A brownfield electrical network was designed for unidirectional power flow from utility to load. The protection scheme reflects that · directional relays facing one way, anti-islanding relying on under-frequency, sensitivity tuned for utility-source fault levels. Inject 10 MW of solar at the LV bus and the assumptions break. Power flows reverse in the morning, fault levels jump on the inverter contribution, anti-islanding fails on balanced load match, and the utility refuses commissioning until a formal integration study certifies grid-code compliance. The study models the integrated network across all operating cases, redesigns the protection scheme, sizes anti-islanding interlocks, and certifies CEA / IEEE 1547 / IEC 61400 compliance.

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.

Renewable resource + topology

PV plant sized against tilt, ambient, soiling, degradation per IEC 61724. Wind turbine power curve characterised. BESS C-rate, round-trip efficiency, end-of-life capacity modelled.

Grid code compliance modelling

Fault ride-through (FRT) curves checked against CEA / IEEE 1547 / CGN code. Reactive capability envelope verified. Frequency regulation, voltage regulation, harmonic injection limits checked.

Protection re-coordination

Directional relays re-tuned for bidirectional flow. Anti-islanding scheme engineered (active + passive, ROCOF + vector shift). Inverter contribution included in short-circuit study.

Power quality impact

Inverter harmonic injection modelled. Voltage profile across all operating cases. PV cloud-transient simulation, wind ramp event simulation. STATCOM or filter sized if injection exceeds IEEE 519.

Sign-off + grid code certification

Report signed by a Chartered Engineer. Grid code compliance attestation per CEA / IEEE 1547 / national code. Annexed to utility commissioning application.

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 1547 · Interconnection and Interoperability of Distributed Energy Resources
IEC 61400 (all parts) · Wind energy generation systems
IEC 61724 · Photovoltaic system performance monitoring
CEA Regulations (India) · Grid Connectivity of Distributed Generation
NFPA 70 Article 690 · Solar Photovoltaic (PV) Systems (USA)

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 · 8 MW captive solar

Integration study with 33 kV PCC injection. Re-coordinated 12 directional relays. Anti-islanding engineered with utility-side intertie. Certified grid code · commissioning approved on first submission.

Steel plant, USA · 12 MW solar + 4 MWh BESS

Cloud transient simulation showed 2.4 MW/sec ramp · sized BESS for ride-through. STATCOM tuning preserved voltage during morning ramp. EAF coordination unaffected.

Pharma, KSA · 5 MW rooftop solar

PV harmonic injection at 0.4 kV bus modelled. Sized 7% detuned filter to keep PCC THD below 4%. Voltage rise during midday injection limited via reactive setpoint.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.