Reactive Power
Compensation Study
Overview
Reactive power management is fundamental to voltage stability and operational efficiency in any power system. A Reactive Power Compensation Study determines the optimal type, size, and location of reactive power sources — including capacitor banks, reactors, STATCOMs, and SVCs — to maintain voltage within statutory limits and improve power factor across all load conditions.
What the Study Covers
Advanced Power Factor Correction Mapping
Conducted using ETAP's load flow, voltage stability, and power factor correction modules, the study provides a complete reactive power management plan:
Load Flow Analysis
Load flow analysis across peak, off-peak, and contingency scenarios to map reactive demand
Utility Target Compliance
Power factor correction: identification of compensation required to meet utility target (typically 0.95 or above)
Capacitor Strategy
Capacitor bank sizing, placement, and switching strategy to avoid leading power factor at light load
Ferranti Effect Mitigation
Reactor sizing for long cable or lightly loaded overhead line situations (Ferranti effect mitigation)
Voltage Profile Optimization
Voltage profile improvement across the network, from the point of supply to end-user busbar
Harmonic Interaction
Harmonic interaction assessment between capacitor banks and non-linear loads
Sensitivity Analysis
Sensitivity analysis to determine optimal switching thresholds
Applicable Standards
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01
IEEE 1036
Guide for the Application of Shunt Power Capacitors
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02
IEEE 18
Standard for Shunt Power Capacitors
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03
IEEE 399 (Brown Book)
Recommended Practice for Industrial and Commercial Power Systems Analysis
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04
IEC 60871
Shunt capacitors for AC power systems having a rated voltage above 1 kV
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05
IEC 61000 Series
Electromagnetic compatibility (EMC) standards for harmonic assessment, measurement, and mitigation in power systems
Typical Applications
Industries with large motor loads, data centres, steel plants, mining facilities, and renewable energy plants requiring reactive power capability at the point of connection all benefit from this study.
Benefits
Financial Optimization
Reduces reactive power import charges and improves power factor penalty avoidance
Supply Quality
Stabilises voltage profiles, improving the quality of supply to sensitive loads
Loss Mitigation
Reduces active power losses in cables and transformers
Asset Longevity
Extends equipment life by reducing thermal stress associated with high reactive currents
Why We Are the Best for Reactive Power
Compensation Studies in India
India's electricity regulators and distribution utilities apply strict power factor norms, and penalties for under-correction are a material operational cost for many large consumers. At the same time, over-correction at light load causes voltage rise and protection issues that are equally problematic. Striking the optimal balance requires more than a standard capacitor sizing calculator — it requires rigorous system modelling that captures the full operating range.
Our ETAP-based reactive power studies are built on fully validated network models, not simplified equivalents. We incorporate actual load diversity factors, transformer tap positions, and harmonic spectrum data from your site to ensure that our compensation recommendations work across every operating condition — not just the design case.
- ETAP-certified engineers with deep expertise in power factor correction for HV and MV industrial networks
- Detailed harmonic filter design integrated into compensation schemes where VFDs or arc furnaces are present
- Compliance with DISCOM/SLDC reactive power schedule requirements for grid-connected plants
- Economic optimisation: CAPEX and OPEX comparison of fixed capacitors, switched banks, and dynamic compensation (STATCOM/SVC)
- On-site measurement campaigns available to validate model assumptions before finalising compensation design
