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Electrical Power Systems Analysis and Simulation Software


Base Modules

• Load Flow/Contingency Analysis

• Short Circuit Analysis

• Harmonic Analysis

• Motor Starting Analysis

• Line Parameter Calculation

• Network Reduction

• Investment Analysis (present value)

• Dynamic Simulator: RMS-Simulation

• Over current Protection

• Distance Protection

• Reliability Analysis

• NPL Programming Library (C/C++)

• Interfaces GIS/SCADA (SQL, ASCII)


Transmission Modules

• Base Modules

• N-1 constrained Optimal Power Flow

• Available Transfer Capability Analysis (ATC)

• Dynamic Simulator: RMS, EMT, Phasor dynamics

• Voltage and Small signal Stability

• Day-Ahead Congestion Forecast (DACF)

• Asset Management (RCM)

• Grounding System Analysis 


Distribution Modules

• Base Modules

• Load Forecast / Load profiles

• Optimization of Distribution Network

• Assessment of network disturbances

• Optimal Feeder Reinforcement

• Optimal Capacitor Placement

• Phase Swapping

• Optimal Network Restoration Strategy

• Cable thermal analysis

• Low-voltage calculation

• Fault Finding

• Asset Management (RCM)


Industrial Modules

• Base Modules

• Cable sizing

• Arc Flash Calculation

• Grounding System Analysis


NEPLAN Toolbox for Research

• All Modules

• NPL Programming Library (C/C++)

• Matlab/Simulink Interface



  • Probabilistic Reliability Analysis    

  • Load Flow Analysis

  • Short Circuit Analysis

  • Motor Starting Analysis

  • Harmonic Analysis

  • Network Reduction

  • Selectivity Analysis 

  • Distance Protection

  • CT Saturation and Thermal Analysis

  • Load Flow with Load Profiles

  • Optimal Network Restoration Strategy

  • Low Voltage Analysis

  • Phase Swapping

  • Optimization in Distribution Networks

  • Optimal Power Flow

  • Small Signal Stability

  • Voltage Stability Analysis

  • Cable Sizing

  • Arc Flash Analysis


Key & Unique Features of NEPLAN:

  • Displays the data requirements for load flow and short circuit studies, Transient stability, Harmonic analysis and motor starting analysis by highlighting the specific fields in a user defined color and font color.

  • Creation of what-if scenarios without the necessity of creating separate model file for each scenario.

  • Comparison of the results from different subcases created on a single SLD.

  • The network analysis has a module for investment analysis.

  • Investment analysis takes inflation and taxation rates in to the calculation as user inputs.

  • Insertion of images in the background to facilitate easy drawing of the network using the background image as stencil.

  • Facility to show the flow direction of either active power flow or reactive power flow with arrow marks.

  • Facility to show the power flows in animation mode.

  • Module for determining the optimal capacitor placement on radial systems.

  • Provision to display the voltages at the nodes in the form of a voltage gauge.

  • Has a provision to display the line/other element loadings in the form of a pie chart on the respective elements.

  • Provision to provide a visualization of voltages, active power, reactive power of various elements and reliability indices in the form of a contour diagram for easy visualization and comparison of results across the modeled network.

  • Representation of the network not only in terms of voltages but also based on the areas, zones, switching status, partial networks, unfeeded networks, in maintenance and projected etc.

  • The software, in addition to the color representation, provides for representing the network elements in terms of color ranges based on analysis results of load flow, reliability and short circuit analysis with 8 color ranges available for representation. 

  • Display the analysis results related to each network element modeled on the network diagram itself. Also possible to display the results of two different analysis on the network diagram at the same time.

  • Model loads as single phase, two phase and three phase loads.

  • Customized templates in excel for the generation of arc flash hazard analysis stickers.

  • Modeling of different characteristics of protection relays like normal inverse, very inverse, extremely inverse etc of IEC, IEEE and ANSI curves. Model customized relay characteristics by user defined characteristics.

  • Modeling of user defined dynamic models with help of discrete modeling blocks.

  • Default set of regulator models for generator governors and AVRs as defined in IEEE standards.

  • Display the relay operating times in case of a fault simulation. Display the operating times upto a user defined limit in the network.

  • Simulation of transient stability in both RMS and DQO modes.

  • Highlight the data required for specific studies in user defined colors and fonts for ease of identification of data requirements for a specific study.

  • Definition of limits on voltage of the buses based on the voltage level of the buses.

  • Definition of distributed slack bus for the power flow simulations.

  • Copying of the simulations results directly into Microsoft office packages like excel and word.

  • Creation and storage of libraries in separate set of files for easy exchange of data rather than storing the libraries in a database file.

  • Easy interface for the creation of libraries of different components like lines, transformers, breakers, shunts etc. Also possible to define relay libraries.

  • Interface to define special types of faults where faults between different phases of two different transmission lines can be simulated.

  • Specify the optimal breaker open positions in a network to minimize the losses.

  • Simulate load flow with continuous load profiles by taking into consideration the load profiles of various customers, industries etc.

  • Generate frequency Vs impedance plots to determine any resonance points in the network for a given harmonic profile.

  • Definition of harmonic current sources in a simple interface which directly takes harmonic current either as ampere or % of load current.

  • Provision to model renewable energy sources with relevant IEC /IEEE short circuit parameters to facilitate representation of renewable sources.

  • Programmable language sort of API to facilitate user defined functions.

  • Definition of user defined dynamic models in the form of a text file in addition to individual control block diagrams.

  • Generate PV curves and QV curves for the given buses and provision for Eigen value analysis to determine the voltage stability of the network.

  • Perform small signal stability analysis of a given power system network.

  • Model FACTS devices along with their controllers.

  • Well defined examples for all the analysis and documentation of these examples available within the setup files of the software to avoid searching for the material.

  • Facilitates calculation of voltage dips during motor starting for different types of starters like DoL, Star-Delta, Auto transformer, resistance starter and soft starters. Also plot the Torque, Speed characteristics of the motor and also estimate the motor speed torque characteristics from the motor data.

  • Calculation of Eigen vectors and participation factors for the small signal stability. Represent the participations factors in the form of a bar chart. Plotting the Eigen values.

  • Generate overcurrent coordination chart for each calculation done and possible to change the settings of the relay from the coordination charts itself.

  • Naming/renaming of the coordination charts. 

  • Creation of own symbol library.

  • Save the network diagram views with distinct zoom ranges of the network to facilitate easy navigation to various parts of the network. On choosing a particular saved zoom setting, software displays different elements of interest to a particular zoom level.

  • Define multiple graphics for the same bus number to facilitate easier drawing of networks in different diagrams.

  • Customization for the display of font size and background color for the transformers, lines , buses, protection devices etc. to facilitate easy recognition.

  • Perform harmonic load flow for a given order of harmonic frequency.

  • Calculate the level of harmonics based on vectorial or arithmetic combination of the harmonics.

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