The CYMDIST Distribution Analysis program is designed for planning studies and simulating the behavior of electrical distribution networks under different operating conditions and scenarios. It includes several built-in functions that are required for distribution network planning, operation and analysis. The analysis functions such as load flow, short-circuit, and network optimizations, are performed on balanced or unbalanced distribution network that are built with any combination of phases and configurations.

CYMDIST is also equipped with add-on modules to perform more in-depth analyses such as reliability analysis, contingency analysis, harmonic analysis, switching (tie-points) optimization, and more.

CYMDIST is an extremely powerful tool to assist you in creating “what-if” studies and performing simulations to evaluate the impact of modifications to the system.

All the data resides in standard SQL tables and XML files so it can be easily populated or queried by third parties applications. CYMDIST can be interfaced with or embedded in other applications such as AM/FM/GIS system, DMS, NMS, OMS or SCADA systems and is available as a Microsoft ® Component Object Model (COM) for integration with other COM-compliant applications.

• Power flow and voltage drop analysis
• Fault flow analysis
• Optimal capacitor placement and sizing
• Load balancing and load allocation/estimation
• Voltage drop analysis with profiles
• Harmonic analysis
• Switching (tie-points) optimization
• Network planning
• Distributed generation modeling
• Service restoration
• Reliability analysis (predictive and historical)
• Contingency analysis
• Substation and sub-network modeling and analysis
• Secondary network analysis
• Arc flash hazard assessment
• Protective device coordination

• Balanced and unbalanced voltage drop and short-circuit analyses (radial, looped or meshed).
• Protective device coordination verification according to user-defined criteria for device clearance and loading.
• Fault current calculations for RMS, asymmetrical and peak values for all shunt fault configurations.
• Fault flow and fault voltage analysis throughout the network taking into account pre-fault loading conditions.
• Optimal capacitor placement and sizing to minimize losses and / or improve voltage profile.
• Minimum fault protection analysis.
• Load balancing to minimize losses.
• Load allocation/estimation using customer consumption data (kWh), distribution transformer size (connected kVA), real consumptions (kVA or kW) or the REA method. The algorithm supports multiple metering units as fixed demands and large metered customers as fixed load.
• Motor starting analysis (voltage dip and maximum motor size allowable).
• Flexible load models for uniformly distributed loads and spot loads featuring independent load mix for each section of circuit.
• Load growth studies for multiple years.
• Feeder interconnection for load transfer simulations.
• Phase merging capability.
• Automatic re-conductoring and re-phasing of multiple selected sections.
• Computes load equivalents and network equivalents to ease the analysis of large networks, matching exactly the power flow and short-circuit results of the non-reduced network.
• Distributed generation modeling, generator impedance estimation, grid side control and protection functions.

Reporting capabilities: CYMDIST reporting facilities allow to fully define the analyses results into web reports. CYMDIST includes a variety of report templates for all types of analyses. You can combine any reports, and create new ones, utilize any CYMDIST variable and created your own mathematical expressions using any of those variables, which further extends the reporting possible with CYMDIST.

The following optional add-on modules significantly enhance the technical capabilities of CYMDIST:

• Network Forecaster: to view, modify and create time-dependent projects (using the CYME Advanced Project Manager) consisting in modifications to the network such as the addition of any load at a given date, change/replacement of power transformers within a substation, a rephasing/reconductoring project, network switching or reconfiguration, etc.
• Advanced Project Manager: extensive tool that supports the collaborative and detailed preparation of a project that consists in modifications to the network with related simulations.
• Energy Profile Manager: to perform time range analysis based on a combination of historical consumption patterns and real-time monitoring.
• Reliability Assessment:provides a framework within which predictive and historical reliability assessment scenarios are run and the impacts of the related investment such as DA (Distribution Automation) can be evaluated and understood.
• Transient Stability Analysis CYMSTAB: to simulate 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.)
• Harmonic Analysis CYMHARMO: to perform harmonic penetration analysis in electric power systems. It features single phase and full three-phase modeling capabilities and includes a large library of pre-defined models for network equipment and harmonic current sources.
• Arc Flash Hazards Analysis: to analyze and promote the electrical safety for employees working on or near electrical equipment. It computes the necessary parameters required to assess the risk level and adopt the adequate safety procedures.
• Dynamic Motor Starting Analysis: to simulate the starting of an induction motor or of a synchronous motor and obtain graphs of the results as a function of time or speed.
• Switching Optimization: assists in determining the optimal feeder configuration that will minimize losses, improve the voltage profile and balance the load between feeders.
• Single Contingency: to study the impact of single forced or planned outages on the electrical distribution system and find the optimal switching plan to restore electrical power to priority customers and to recover the maximum possible load in the affected areas.
• Substations and Sub-networks Modeling and Analysis: to model all the major components of the distribution substation and any sub-network such as the detailed modeling of an industrial facility.
• Secondary Grid Networks Modeling: allows the power flow and short circuit analyses of heavily meshed secondary network distribution systems for any voltage level.
• Geographic Overlay: to display raster or vector map images (geographical land-base such as DWG, DXF, SHP, etc) as layers directly underneath the electrical model.

• CYMDIST Gateway: CYMDIST Gateway is the CYME solution for the creation and maintenance of the CYMDIST distribution network data model. The connectivity network extracted from the GIS is accurate, electrically complete, with actual loads and switch status; and this network model can be updated easily.
• CYMTCC: addresses Time Over-Current protection for Industrial, Commercial and Distribution Power systems. Features a direct interface to CYMDIST to verify the coordination of protective devices, the maximum permitted operating time («Reach») and the maximum permitted continuous load current.

CYMDIST offers a wide variety of graphical reports and color-coding of the one-line diagram for over/under voltage conditions, overloaded equipment, isolated sections, fault levels, voltage levels, etc.

In addition, CYMVIEW, which is common to all simulation modules, interfaces to CYMDIST to generate graphical displays of the phase voltage, fault current, reactive power and apparent power profiles from the substation to the selected section.