H.11 Version 6.0 – released Dec 16, 2016

The Matpower 6.0 User’s Manual is available online.⁸⁵

New Open Development Model

• Matpower development has moved to GitHub! The code repository is now publicly available to clone and submit pull requests.⁸⁶
• Public issue tracker for reporting bugs, submitting patches, etc.⁸⁷
• Separate repositories for Matpower, MOST, MIPS, MP-Test, all available from https://github.com/MATPOWER/.
• New developer e-mail list (MATPOWER-DEV-L) to facilitate communication between those collaborating on Matpower-related development. Sign up at:
  https://matpower.org/mailing-lists/#devlist.

New Case Files

• Added 9 new case files, 8 cases ranging from 1888 to 6515 buses representing the French system, and a 13,659-bus case representing parts of the of the European high voltage transmission network, stemming from the Pan European Grid Advanced Simulation and State Estimation (PEGASE) project. Thanks again to Cédric Josz and colleagues from the French Transmission System Operator. Please cite reference [45] when publishing results based on these cases.
• Added case145.m, IEEE 145 bus, 50 generator dynamic test case from the U of WA Power Systems Test Case Archive⁸⁸ .
• Added case33bw.m, a 33-bus radial distribution system from Baran and Wu.

New Features

• Matpower Optimal Scheduling Tool (MOST) 1.0b1 is a major new feature, implementing a full range of optimal power scheduling problems, from a simple as a deterministic, single period economic dispatch problem with no transmission constraints to as complex as a stochastic, security-constrained, combined unit-commitment and multiperiod OPF problem with locational contingency and load-following reserves, ramping costs and constraints, deferrable demands, lossy storage resources and uncertain renewable generation. See docs/MOST-manual.pdf for details.
• General mechanism for applying modifications to an existing Matpower case. See apply_changes() and idx_ct().
• Redesigned CPF callback mechanism to handle CPF events such as generator limits, nose point detection, etc. Included event log in CPF results.
• Added options 'cpf.enforce_p_lims' and 'cpf.enforce_q_lims' to enforce generator active and reactive power limts in the continuation power flow.
• Added OPF option 'opf.use_vg' to provide a convenient way to have the OPF respect the generator voltage setpoints specified in the gen matrix.
• Experimental foundation for handling of ZIP load models in power flow (Newton, fast-decoupled only), continuation power flow, and optimal power flow (MIPS, fmincon, Knitro, Ipopt solvers only). Currently, ZIP loads can only be specified on a system-wide basis using the experimental options
  'exp.sys_wide_zip_loads.pw' and 'exp.sys_wide_zip_loads.qw'.
• Support for quadprog() under GNU Octave.
• New contributed extras:
  • Plot electrically meaningful drawings of a Matpower case using plot_mpc() in extras/misc, contributed by Paul Cuffe.
  • Find the maximum loadability limit of a system via an optimal power flow and dispatchable loads, using maxloadlim() in extras/maxloadlim, contributed by Camille Hamon.
  • Create a quadratically-constrained quadratic programming (QCQP) representation of the AC power flow problem using using qcqp_opf() in extras/misc, contributed by Cédric Josz and colleagues.
• New functions:
  • apply_changes() and idx_ct() provide a general mechanism for applying modifications to an existing Matpower case.
  • feval_w_path() evaluates a function located at a specified path, outside of the Matlab path.
  • mpopt2qpopt() provides a common interface for creating options struct for mi/qps_matpower() from a Matpower options struct.
• New function options:
  • Option to call makeB(), makeBdc(), makePTDF(), scale_load(), and total_load() with full case struct (mpc) instead of individual data matrices (bus, branch, etc.).
  • total_load(), which now computes voltage-dependent load values, accepts the values 'bus' and 'area' as valid values for 'load_zone' argument.

Other Improvements

• Changed default solver order for LP, QP, MILP, MIQP problems to move Gurobi before CPLEX and BPMPD after Optimization Toolbox and GLPK.
• Added some caching to mpoption() and made minor changes to nested_struct_copy() to greatly decrease the overhead added by mpoption() when running many small problems.
• Added option 'cpf.adapt_step_damping' to control oscillations in adaptive step size control for continuation power flow.
• Added CPF user options for setting tolerances for target lambda detection and nose point detection, 'cpf.target_lam_tol' and 'cpf.nose_tol', respectively.
• Added support for Matlab Optimization Toolbox 7.5 (R2016b).
• Added support for MOSEK v8.x.
• Added tests for power flow with 'pf.enforce_q_lims' option.
• Updated network reduction code to handle cases with radially connected external buses.
• Updated versions of qcqp_opf() and qcqp_opf() in extras/misc, from Cédric Josz.
• Added “Release History” section to Appendix of manual.
• Many new tests.

Bugs Fixed

• Fixed bug in toggle_dclines() that resulted in fatal error when used with OPF with reactive power costs. Thanks to Irina Boiarchuk.
• Fixed fatal bug in update_mupq() affecting cases where QMIN is greater than or equal to QC1MIN and QC2MIN (or QMAX is less than or equal to QC1MAX and QC2MAX) for all generators. Thanks Jose Miguel.
• Copying a field containing a struct to a non-struct field with nested_struct_copy() now overwrites rather than causing a fatal error.
• Fixed a bug in psse_convert_xfmr() where conversion of data for transformers with CZ=3 was done incorrectly. Thanks to Jose Luis Marín and Yujia Zhu.
• Fixed a fatal bug in psse_convert_xfmr() affecting transformers with CW and/or CZ equal to 1. Thanks to Matthias Resch.
• Fixed a crash in have_fcn() caused by changes in OPTI Toolbox v2.15 (or possibly v2.12)
• Commented out isolated bus 10287 in case3375wp.m.
• Added code to DC OPF to return success = 0 for cases where the matrix is singular (e.g. islanded system without slack).
• Fixed problem in have_fcn() where SeDuMi was turning off and leaving off all warnings.
• Fixed shadow prices on variable bounds for AC OPF for fmincon, Ipopt, and Knitro.
• In savecase() single quotes are now escaped properly in bus names.
• Generator capability curve parameters that define a zero-reactive power line no longer cause a fatal error.
• Bad bus numbers no longer cause a fatal error (after reporting the bad bus numbers) in case_info().

Incompatible Changes

• Removed fairmax() from the public interface by moving it inside uopf(), the only place it was used.
• Removed 'cpf.user_callback_args' option and modified 'cpf.user_callback'.
• Changed name of 'cpf.error_tol' option to 'cpf.adapt_step_tol'.
• Changed the Sbus argument in newtonpf() from a vector to a function handle to a function that returns a vector.