H.6 Version 3.2 – released Sep 21, 2007

The Matpower 3.2 User’s Manual is available online.⁷⁹

New Features

• AC OPF formulation enhancements
  • new generalized cost model
  • piece-wise linear generator PQ capability curves
  • branch angle difference constraints
  • simplified interface for specifying additional linear constraints
  • option to use current magnitude for line flow limits (set OPF_FLOW_LIM to 2, fmincopf solver only)
• AC OPF solvers
  • support for TSPOPF, a new optional package of three OPF solvers, implemented as C MEX files, suitable for large scale systems
  • ability to specify initial value and bounds on user variables
• New (v. 2) case file format
  • all data in a single struct
  • generator PQ capability curves
  • generator ramp rates
  • branch angle difference limits
• New function makePTDF to build DC PDTF matrix
• Added 5 larger scale (> 2000 bus) cases for Polish system (thanks to Roman Korab).
• Improved identification of binding constraints in printout.
• Many new tests in test suite.

Bugs Fixed

• Phase shifters shifted the wrong direction, again (v.2 had it right).
• Fixed bug in pfsoln which caused incorrect value for reactive generation when for all generators at a bus in power flow solution.

Incompatible Changes

• User supplied matrix for general linear constraints in OPF no longer includes columns for helper variables for piecewise linear gen costs, and now requires columns for all (OPF) variables.
• Changed the sign convention used for phase shifters to be consistent with PTI, PowerWorld, PSAT, etc. E.g. A phase shift of 10 deg now means the voltage at the “to” end is delayed by 10 degrees.
• Name of option 24 in mpoption changed from OPF_P_LINE_LIM to OPF_FLOW_LIM.