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Distribution System Analysis


The CYMDIST software performs several types of analysis on balanced or unbalanced three-phase, two-phase and single-phase systems that are operated in radial, looped or meshed configurations. The software includes a full network editor, as well as:
  • Unbalanced load flow
  • Comprehensive fault analysis
  • Load balancing
  • Load allocation/estimation
  • Optimal capacitor placement


The CYMDIST Distribution Analysis software is a suite of applications composed of a network editor, analysis modules and user-customizable model libraries from which you can choose to get the most powerful solution.

The 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 software workspace is fully customizable. The graphical representation of network components, results and reports can be built and modified to supply the level of detail needed. Innovative engineering technologies, industry practices and standards are at the core of the CYMDIST algorithms, flexible user interface and extensive libraries.

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.



Optional add-on modules allow performing more in-depth analyses such as reliability analysis, contingency analysis, harmonic analysis, switching (tie-points) optimization, and more.

The CYMDIST analysis software 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.

Furthermore, the CYME COM module allows the environment of your choice to communicate with the CYMDIST software to access different pre-defined functions and calculations.



All the data resides in standard SQL tables and XML files so it can be easily populated or queried by third parties applications. The CYMDIST software 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.

Features and Capabilities

  • Power flow and voltage drop analysis
  • Short-circuit analysis
  • Optimal capacitor placement and sizing
  • Load balancing and load allocation/estimation
  • Load flow analysis with profiles
  • Harmonic analysis
  • Switching (tie-points) optimization
  • Advanced Project Manager and Network Forecaster
  • Distributed generation modeling
  • Long-term dynamics analysis
  • Reliability analysis (predictive and historical)
  • Optimal voltage regulator placement
  • Optimal recloser placement
  • Single contingency assessment and restoration
  • Substation and sub-network modeling
  • Secondary network analysis
  • Arc flash hazard assessment
  • Protective device analysis



Analytical Capabilities - CYMDIST Core Modules

  • 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
  • Short-circuit 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




Simulation Results

The CYMDIST software 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.

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

In addition, the software generates graphs of the phase voltage, fault current, reactive power and apparent power profiles from the substation to the selected section.



CYMDIST Additional Modules

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

  • Automated Network Forecast Analysis: to create, view and modify 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.
  • Steady State Analysis with Load Profiles: 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: 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: 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. The Frequency scan capability included in this module is also available as an independent module. This analysis provides full impedance scan results and allows the user to see problematic areas even before installing harmonic devices.
  • 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.
  • Motor Starting Analysis: to simulate the effects of induction and synchronous motor starting in three-phase electric power systems.
  • Load Flow Contingency (N-p): to assist in power flow related static contingency analysis. To create contingency events and single- or multiple-outage scenarios and compare to a base case.
  • Long Term Dynamics: time-series simulation to study the impact of insolation variations, wind fluctuations and load variations on network controls.
  • Protective Device Analysis: provides engineers with a wide range of tools to efficiently and accurately design and validate the coordination scheme of their power system.
  • Optimal Voltage Regulator Placement: to place regulators at locations to improve the network conditions based on selected objectives.
  • Optimal Recloser Placement: to place reclosers at locations to improve the network conditions based on selected objectives.
  • Network Configuration Optimization: assists in determining the optimal feeder configuration that will minimize losses, improve the voltage profile and balance the load between feeders.
  • Single Contingency Assessment and Restoration: 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.
  • Enhanced Substation Modeling: 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 and Analysis: 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.
  • Online Maps Service: complements the CYME Geographic Overlay module and provides the capability to display Google™ maps and MapQuest™ Open maps as layers underneath the geographical view of your electrical network model.


Complementary Modules

  • CYME COM Module: as a programming language-independent process, the CYME COM module allows the environment of your choice to communicate with the CYMDIST software to access different pre-defined functions and calculations.
  • CYME Gateway: CYME Gateway is the CYME solution for the creation and maintenance of the 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.
  • CYME for ArcGIS Desktop™: this solution is an out-of-the-box toolbar that seamlessly integrates into the ArcGIS Desktop™ framework to embed power systems analytics into your GIS environment. Along with the CYME Server solution, it offers powerful analytical ability, meeting the need for answers in a prompt manner.
  • CYME Server: brings the CYME network model and analysis engines into your IT environment to facilitate the widespread and efficient use of this powerful engineering analysis tool. These advanced applications allow system operators to respond quickly and decisively to changing network conditions and threats while driving significant improvements in network efficiency and reliability.
  • 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. The Arc Flash Hazards analysis module can be added to CYMTCC.

Contact information

International & Canada
Tel:(450) 461-3655
Fax:(450) 461-0966
 
USA
Tel:(800) 361-3627
 
Web:  cymeinfo@eaton.com