The following analyses are included in the CYMDIST package:
Optional modules can be added to CYMDIST to extend the functionality to perform more in-depth and specialized analyses. New modules are developed regularly to meet the evolving needs of the distribution engineers.
Accurate modeling and representation
The modeling capabilities of Eaton's CYME software network editor include the detailed representation of all portions of a distribution network, including the MV primary system, the LV secondary system (radial or meshed) as well as the subtransmission system.
The CYMDIST base package is a comprehensive tool providing distribution engineers with key applications to perform system planning studies, simulations and analysis on a daily basis.
At the core of the software are extensive libraries, detailed models and algorithms in line with industry best practices and standards and based on innovative engineering technologies. Its fully customizable graphical user interface provides the representation, results and reports at the level of detail needed.
The steady-state performance of the power system under various operating conditions is simulated using the load flow analysis of CYMDIST. It is the basic analysis tool for the planning, design and operation of any electrical power system.
The comprehensive analysis results include voltage, current, power factor, losses, abnormal conditions and unbalanced factors. The results can be viewed for the whole system or for individual locations.
Comprised of a number of applications, the fault analysis functions in CYMDIST support the assessment of issues related to faults in the distribution system.
It includes three short-circuit calculation methods: Conventional, ANSI, IEC 60909 and IEC 61363. All methods are based on multiphase models to solve complex balanced/unbalanced, single/two/three phase systems and radial/highly meshed power systems.
The fault analysis applications of CYMDIST also include:
Load allocation and estimation
This analysis assists in developing an accurate load model by allocating feeder demands across the network based on transformer connected capacity, consumption/billing data or existing calculated load data.
The load balancing analysis is used to determine which loads or lateral taps can be reconnected to different phases so as to minimize kW losses or balance the current, the load, or the voltage. It reports a series of individual changes to the network and the objectives improvement with each change.
Optimal capacitor placement and sizing
This analysis helps in determining the ideal location and size of shunt capacitors banks to reduce kW losses or to improve the system voltage while maintaining a desired power factor. The user can provide guidance regarding the size, number and appropriate locations of the capacitor banks, and approve whether the recommended banks should be installed or not.
Alternately, the analysis can provide an exhaustive list of all possible capacitor placement locations with associated impacts on voltages and kW losses.
The motor starting functionality of CYMDIST determines the impact of induction or synchronous motors starting on the system by evaluating voltage flicker. An estimation tool also provides the largest single- or three-phase motor size for all locations based on the maximum voltage dip allowed.
The batch analysis function allows users to run multiple user-defined scenarios on a selection of studies, self-contained files and multiple networks available in the database. Each scenario is configurable and can include several analysis simulations; each of these using configurable parameters.
This function is even more powerful when coupled with the Advanced Project Manager module and/or the Automated Network Forecast Analysis module to run analyses on user-defined project scenarios.
Eaton's CYME software comprises several add-on modules for detailed modeling and in-depth simulations bringing the analysis of any power system to a whole new level.
The modeling modules allow creating a very detailed model of the distribution system from subtransmission to the customer meter, including secondary networks.
The CYME advanced analysis modules help engineers to perform system-wide distribution capacity planning studies, assess distributed generation interconnection impact, improve system reliability and optimize grid efficiency.