01-06-2013, 03:24 PM
SimPowerSystems™ Release Notes
SimPowerSystems.pdf (Size: 249.24 KB / Downloads: 196)
Using Release Notes
Use release notes when upgrading to a newer version to learn about:
• New features
• Changes
• Potential impact on your existing files and practices
Review the release notes for other MathWorks® products required for this
product (for example, MATLAB® or Simulink®). Determine if enhancements,
bugs, or compatibility considerations in other products impact you.
If you are upgrading from a software version other than the most recent one,
review the current release notes and all interim versions. For example, when
you upgrade from V1.0 to V1.2, review the release notes for V1.1 and V1.2.
Version Compatibility Considerations
When a new feature or change introduces a reported incompatibility between
versions, the Compatibility Considerations subsection explains the
impact.
Compatibility issues reported after the product release appear under Bug
Reports at the MathWorks Web site. Bug fixes can sometimes result
in incompatibilities, so review the fixed bugs in Bug Reports for any
compatibility impact.
Fixed Bugs and Known Problems
MathWorks offers a user-searchable Bug Reports database so you can view
Bug Reports. The development team updates this database at release time
and as more information becomes available. Bug Reports include provisions
for any known workarounds or file replacements. Information is available
for bugs existing in or fixed in Release 14SP2 or later. Information is not
available for all bugs in earlier releases.
Undocumented Extras Library Blocks
All SimPowerSystems™ blocks have block mask descriptions and have been
tested and validated. However, many blocks in the Extras library do not have
block reference pages in the product documentation.
The Extras library blocks without block reference pages are listed below.
The blocks shown in bold have corresponding continuous blocks that are
documented. The rest of the blocks are undocumented.
New Setup Function for Permanent Magnet
Synchronous Machine Block
The power_PMSynchronousMachineParams function lets you compute
parameters of a Permanent Magnet Synchronous Machine block based on
standard manufacturer specifications. It lets you input manufacturer data
and returns the computed machine parameters, along with additional derived
data such as synchronous speed, number of pole pairs, nominal slip, starting
torque, and so on. The function also lets you display relative errors between
the input manufacturer data and the equivalent data obtained with the
computed parameters. The function comes with a graphical user interface
that allows you to compute the block parameters and apply it to selected
block, as well as display the detailed results in the Command window.
Additional Solver Type Option Available for Discrete
Mode
When you set the Simulation type parameter of the Powergui block to
Discrete, the dialog box now contains a new parameter, Solver type, which
lets you select between Tustin and Backward Euler options. Tustin is the
method used in previous versions. It is still the default, therefore there is
no compatibility impact on existing models. If your model shows numerical
oscillations upon simulation in discrete mode, using Backward Euler method
to discretize the state-space matrices may help eliminate the oscillations.
New Load Flow Tool
The Load Flow and Machine Initialization tool that was available in
previous releases is renamed Machine Initialization. You can use it to
set initial conditions of three-phase machines and regulators in order to
start simulation in steady-state. The new Load Flow tool now provides an
improved load flow solution for SimPowerSystems models, with several new
features and capabilities:
• The load flow solution uses the Newton-Raphson method. It is more robust
and provides a faster convergence than the Machine Initialization tool.
• The new Load Flow tool comes with a graphical user interface that allows
you to display load flow solution at all buses.
• The Three-Phase Source and Three-Phase Programmable Voltage Source
blocks are now taken into account in the load flow. You can now specify
power and terminal voltage of the Three-Phase Source and Three-Phase
Programmable Voltage Source blocks. Similar to the Synchronous Machine,
you can declare these voltage sources as PV, PQ, or swing type. Once the
load flow is solved, the source internal voltage magnitude and angle are
automatically adjusted.
• You can now specify Three-Phase Series and Parallel RLC Load blocks
either as constant impedance (constant Z) or as constant power (constant
PQ). In the previous tool, the Three-Phase Series and Parallel RLC Load
blocks were only considered as constant impedance loads based on the
nominal voltage and active and reactive powers specified in the block menu.