Lugo

|Lugo (Version 4.1) is a minor upgrade of GridLAB-D planned for October 2018. Changes and improvements in Lugo were focused primarily on the deltamode transient analysis (microgrids) and FNCS/HELICS integration, with several minor features and fixes incorporated.

New Capabilities

 * FNCS and HELICS interfaces incorporated
 * Several bug fixes and improvements to the interfaces
 * Includes deltamode capabilities with FNCS/HELICS
 * MySQL module
 * Improved writing mechanism to reduce overhead
 * Several usage fixes
 * Generator module
 * Cleaned up several deprecated objects that had no functionality
 * Inverter has had significant improvements to its functionality
 * Deltamode improvements for better transient simulations
 * Ability to operate as a voltage source inverter and be grid forming
 * Operate in either isochronous or droop mode
 * Droop controller for f/P and V/Q in grid following implementations
 * Ramping limits to reflect power electronics slew limitations
 * Improvements to the inverter IEEE 1547 and IEEE 1547a functionality
 * New Volt/Watt mode
 * Diesel generator has had improvements to its functionality
 * Simplified steady state model to remove inaccurate model
 * Simple overload checking incorporated
 * Deltamode improvements for better transient simulations
 * Added convergence limits for voltage to help control deltamode simulation intervals
 * Simplified set point variables for frequency, voltage, real power, and reactive power dispatch outputs
 * Implemented new control modes for resiliency analysis
 * Constant reactive power dispatch mode
 * Constant real power dispatch mode
 * CVR method for transient reduction, per this paper
 * Simplified fuel use and emissions calculations
 * Powerflow module
 * Fixes for tape-shielded cables
 * Multiple islands supported, including the ability for an island to "fail" and not terminate the simulation
 * Tiered-TOU pricing fixed for triplex_meter
 * Induction motor models
 * Single-phase and three-phase implementation
 * Deltamode support
 * Simple protection schemes (thermal trip and under-voltage contactor)
 * AMI-like fields for meter and triplex_meter
 * fault_check incorporated SINGLE_DEBUG to help track down feeder topology problems
 * Deltamode capability improvements
 * Capacitor objects now can update in deltamode
 * Regulator objects now can update in deltamode
 * Separate integration method selections for series vs. shunt impedance and in-rush calculations
 * Improved GFA functionality in node-type objects
 * Tape module
 * Deltamode support for group_recorder
 * New object - metrics_collector
 * Build/Support
 * Migration to MSYS2-based environment for Windows compiling
 * Updated incorporated superLU MT version to 3.1
 * Updates to build numbering to better reflect GitHub hash system
 * Migration of several objects to GLD API
 * Tickets (tickets relating specifically to the development of this version)
 * Tickets for 4.1 RC1