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Design and modeling

Network editor

The Network editor features a user-customizable graphical user interface underlying the CYMDIST applications and the complementary CYME analyses modules.

This includes extensive modeling capability of Distributed Energy Resources (DER) equipment and energy storage; along with the definition of all customer types necessary. The software also includes control models that are relevant to the various generation sources. All libraries can be enriched by users.

The Network editor is included in the Distribution System Analysis package (CYMDIST).

Learn more about the Network editor module

Enhanced substation modeling

This module enables the accurate representation of all major components of a distribution substation as well as  any sub-network, such as a vault, a switching cubicle or an industrial facility. The simulations then take into account the effects of these installations on the overall distribution system.

Learn more about the Enhanced substation modeling module

Low-voltage secondary distribution modeling

The Low-voltage secondary distribution model performs the detailed modeling and simulation of any circuit beyond the distribution transformer. This includes single-phase center-tapped transformers, plex cables, single-phase three-wire LV circuits.

Learn more about Low-voltage secondary distribution modeling

Secondary grid network analysis

Secondary grid network analysis allows users to model any spot network, secondary grid and detailed network protector relay with complete settings. The module is equipped with robust power flow and short-circuit algorithms to analyze heavily meshed networks.

Learn more about Secondary grid network analysis

Online maps service

Display Google Maps and MapQuest Open maps as layers underneath the geographical view of your electrical network model. With this service, users can locate a substation, a particular feeder, a street corner, or pinpoint the address where a fault occurred.

Learn more about the Online maps service

Geographic overlay

Geographic overlay displays raster or vector map images (geographical landbase such as DWG, DXF, SHP, etc) as layers directly underneath your electrical model. The module allows the import and display of several maps of different formats, so your users can visualize the distribution system over a comprehensive landbase.

Learn more about Geographic overlay

Distribution system analysis

Distribution system analysis (CYMDIST)

The evolution of the distribution systems now requires engineers to perform from planning analyses to expert simulations supporting operations, including protection studies and DER interconnection assessments.

Learn more about Distribution system analysis (CYMDIST)


Load flow

Analyze the steady state performance of the power system under various operating conditions.

Load allocation and estimation

Develop an accurate load model by allocating feeder demands across the network.

Fault analysis

Ensure system safety by assessing the effects of short-circuits (conventional, ANSI, IEC 60909 and IEC 61363), series and simultaneous. Locate faults, verify equipment ratings and study voltage sags.

Learn more about the Fault analysis module

Load balancing

Determine which loads can be reconnected to different phases so as to minimize kW losses or balance the current, the load, or the voltage. 

Optimal capacitor placement and sizing

Place and size capacitors on a desired feeder to reduce kW losses or improve voltage while maintaining a desired power factor.

Motor start

Determine impact of motor start on the network. Evaluate voltage flicker, locked rotor load and maximum motor size estimation.

Learn more about the Motor starting module


Advanced project manager

Supports the collaborative and detailed preparation of time-based projects to assess multiple scenarios in an efficient manner.

Learn more about the Advanced project manager module

Techno-economic analysis

Evaluate the feasibility and profitability of a project, based on the factual system model, leading to realistic planning in line with technical, service reliability and investment objectives. Works in conjunction with the Advanced project manager in order to estimate costs for forecasted load growth.

Learn more about the Techno-economic analysis module

Automated network forecast analysis

Assists in simulating different growth and modification scenarios for any selected network point and time period. Simulations can be performed in a batch mode to help identify impacts of future changes on the whole distribution system.

Learn more about the Automated network forecast analysis module

Power cable ampacity software

CYMCAP is a specialized, stand-alone software dedicated to temperature rise and ampacity calculations for power cable power installations.

Complementary modules support the design of most types of installations and perform many specialized simulations.

Learn more about the Power cable ampacity software

Operational support

Distribution state estimator

Process various measurements to estimate the load and power flow as well as the voltages of the system based on any type of electrical model to determine the best solution. The analysis solves for radial, looped and meshed networks.

Learn more about the Distribution state estimator module

Dynamic data pull

Refine the as-built planning model with field measurements such as power, current, voltage, load demand, generation, or device statuses for switches, voltage regulators and shunt capacitor banks.

Advanced fault locator

Reports all the possible fault locations, taking into account multiple monitoring elements, fault indicator statuses and monitored data from COMTRADE files.

Contigency assessment and restoration

This module is a comprehensive tool to study the impact of contingencies on the distribution system. It supports assessment of the robustness of the networks by identifying potential problems with outages and planning maintenance and finding an optimal switching plan for power restoration.

Learn more about the Contingency assessment and restoration module

N-p load flow contingency

Designed to assist in power flow related static contingency analysis, this module supports the creation of contingency events, single- or multiple-outage scenarios and comparison to a base case in order to assess the system’s capacity and resilience.

Learn more about the N-P load flow contingency module

Protection, coordination and safety

Protective device analysis

This module helps power engineers effectively address protection issues by analyzing time-current curves. The library contains over 15,000 protective device curves.

Module features: network protection analysis, minimum fault analysis and sequence of operation.

Learn more about Protective device analysis

Arc flash hazards analysis

Properly assess the arc flash risk level to ensure a safer work environment by computing the necessary parameters required to determine risk level and adopt adequate safety procedures. This includes a new method that factors in backup protection, multiple contribution and duration.

Learn more about the Arc flash hazard analysis module

Distance protection analysis

Analyze the operation of distance protection relays under normal and fault conditions. Helps in the design and verification of protection schemes and to address different coordination issues in any power system network

Learn more about the Distance protection analysis module

Distributed energy resources

Integration capacity analysis

Integration capacity analysis addresses the interconnection requests by calculating the maximum generation or load capacity that can be installed independently at each point of a distribution system without adversely impacting its reliability and power quality.

Learn more about Integration capacity analysis


Seamlessly integrated into the CYME software graphical user interface, the EPRI DRIVE module combines the engineering effort of the EPRI DRIVE engine with CYME’s detailed distribution system model to return hosting capacity calculation results within a familiar environment.

Learn more about the EPRI DRIVE module

DER impact evaluation

Generation interconnection system impact studies can be executed within minutes with this module. It clearly assesses the impacts of DER interconnections on the distribution system, such as steady state voltage levels, overloads and reverse power flow. The module executes a comprehensive system impact study that integrates several criteria-based verifications and multiple scenarios in order to flag abnormal conditions.

Learn more about DER impact evaluation

Network disturbance assessment

The increasing amount of power electronics, non-linear loads and distributed generation installed on the electrical network can adversely impact power quality by causing unacceptable voltages levels and unbalances, harmonic distortion and flicker levels. 

Learn more about the Network disturbance assessment

Long-term dynamics load flow analysis

This module performs time series long-term dynamics load flow analysis in the seconds to minutes range, of the variable phenomena introduced by distributed energy resources. Device controls are included in the analysis, including tap changers, shunt capacitors and switchable shunt banks. It also enables the time-domain simulation of smart inverters and battery energy storage systems.

Learn more about Long-term dynamics load flow analysis

Power quality

Reliability assessment

The module computes reliability indices for the overall system and their corresponding protection zones, as well as customer point indices. The predictive model can be calibrated based on historical data. The user can analyze different system configurations and measure the improvement in reliability indices.

Learn more about the Reliability assessment module

Harmonic analysis

The harmonic analysis module evaluates the impact of non-linear loads on the network to help engineers find mitigation methods to harmonics issues in the system. It features both single-phase and three-phase modeling capabilities, with the flexibility to assess utility-type grids, industrial power systems and distribution feeders of any configuration.

Learn more about Harmonic analysis

Network disturbance assessment

The network disturbance assessment module evaluates the power quality disturbances produced by equipment on a power source’s signal by determining if the equipment passes different power quality tests. Analysis is based on the standard “Technical Rules for the Assessment of Network Disturbance” published by a German-Austrian-Swiss-Czech working group.

Learn more about Network disturbance assessment 

Dynamic motor starting

To simulate the starting of an induction or synchronous motor and obtain graphs of the results as a function of time or speed. This module complements the voltage flicker, locked rotor and maximum motor size simulations provided with the CYMDIST package.


Network configuration optimization

Reconfigure radial networks to an optimal topology through load transfers in order to reduce losses, mitigate violations or balance feeder lengths.

Learn more about the Network configuration optimization module

Volt/VAR optimization

Identify the optimal configuration of installed capacitors, the in-line regulator and the transformers with LTC in a distribution system. The calculations take into account constraints on the network as well as objectives such as peak shaving, reduced system losses and improved voltage profile in order to optimize system efficiency.

Learn more about the Volt/VAR optimization module

Optimal voltage regulator placement

Use this module to determine the optimal location and set the tap position of voltage regulators, as well as determine the amount of regulators needed to achieve the desired voltage regulation.

Learn more about the Optimal voltage regulator placement module

Optimal recloser placement

Working with the Reliability Assessment module, it takes into account objectives and criteria, studies the reliability indices, and evaluates the expected improvement to find the optimal locations for reclosers.

Learn more about the Optimal recloser placement module

Time series

Steady state analysis with load profiles

This module executes time-series load flow analysis based on the profiles modeled from a combination of historical consumption patterns and real-time monitoring data, such as SCADA, AMI, MDM, AMR, etc.

Learn more about Steady state analysis with load profiles

Long-term dynamics load flow analysis

This module performs time series long-term dynamics load flow analysis in the seconds to minutes range, of the variable phenomena introduced by distributed energy resources. Device controls are included in the analysis, including tap changers, shunt capacitors and switchable shunt banks. It also enables the time-domain simulation of smart inverters and battery energy storage systems.

Learn more about Long-term dynamics load flow analysis

Transient stability analysis

Transient stability analysis simulates the dynamic behavior of distribution systems with distributed generation under various transient events (fault application/clearing, large motor starting, disconnection of co-generation units, islanding, etc.).

Learn more about Transient stability analysis


CYME scipting tool with Python

Python scripting is integrated into the CYME power system analysis software. It consists of an API that exposes the CYME functionality to easily build from automated processes to new algorithms that extend the functionality of the CYME software.

Learn more about the CYME scripting tool with Python module

Enterprise integration

CYME Gateway

Extract all necessary information from your GIS and other enterprise systems to automatically generate up-to-date and accurate distribution network models, ready for planning and operational studies executed with the CYME software.

Learn more about the CYME Gateway solution.

CYME for ArcGis Desktop

The CYME toolbar for ArcGIS Desktop is designed to work with the CYME analysis results within their GIS interface.

Learn more about the CYME for ArcGIS Desktop solution

Dynamic data pull

Refine the as-built planning model with field measurements such as power, current, voltage, load demand, generation, or device statuses for switches, voltage regulators and shunt capacitor banks.

Data push publishing

This is a custom bridge built between the CYME software and the external systems desired, based on the extensive CYME keywords library.

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