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Summary of changes in this fork

Changes in nlaws-wip branch

CYME Reader

bug fixes

• handle LoadModelID (was adding up multiple LoadModelIDs when it should only use one)
• parse TRANSFORMER SETTING taps correctly
• regulator nominal voltages were not scaled correctly
• was setting all SOURCE EQUIVALENT nodes to the source bus (in other words was only handling a single feeder)
  • can now handle a substation with feeder(s) [needs validation with multiple feeders]
• handle sections with single phase regulators correctly
  • for example, for the IEEE13 system the Cyme reader was chaining single phase regulators together that should be in parallel between nodes
• set single phase transformer nominal voltage to LN (was LL)

improvements

• improved logging, debug messages, doc strings, comments
• handle load power factor <= 0
• add parser for TRANSFORMER BYPHASE SETTING
• add Winding.base_voltage field to distinguish the basis for per-unit calculations from actual voltage settings on transformers
• use @staticmethods for static methods

tests

• add test for load.nominal_voltage

OpenDSS Writer

bug fixes

• PV kvarlimit -> kvarmax (name change in openDSS)
• replace all special characters with underscore in object names written to .dss files (openDSS does not allow special characters in object names)
• add PowerSource nominal voltage to Voltagebases
• fix the nominal voltage for single phase voltage regulators (was LL, now LN)
• fix the order of parameter settings for many objects (prevent segmentation faults in openDSS)
• fix capcontrol definitions (was not accounting for the minimum required values and was using some values incorrectly)

improvements

• improved logging, debug messages, doc strings, comments
• add Winding.base_voltage to list of Voltagebases
• implement unbalanced loads
  • was summing all phase loads and only modeling balanced loads
• close the Lines.dss file after writing

tests

• add test for writing unbalanced loads

General

• system_structure_modifier now uses set_nominal_voltages_recur as recommended in the comments
  • remove broken, unused set_nominal_voltages method
  • add warning when changing node nominal_voltage
• add pandas to install_requires (fixing bug when trying to run some functions with pip install all)