MATLAB: Do I receive an error when using the Voltage Measurement block in SimPowerSystems 2.3 (R13.0.1)

blockSimscape Electricalsimulink

I have created a Simulink model using SimPowerSystems blocks. When I update the diagram or try to simulate the model, I receive the following error regarding the Voltage Measurement block:

 Error evaluating 'InitFcn' callback of Voltage Measurement block (mask) 'Voltage Measurement'. Error using ==> get_param
 block_diagram does not have a parameter named 'PortConnectivity'

Best Answer

This problem has been fixed in SimPowerSystems 3.0 (R13.0.1+).

If you are using a previous version, read the following:

This is a bug in SimPowerSystems 2.3 (R13.0.1) in the way that the SimPowerSystems handles inputs from Simulink blocks in other libraries.

To work around this issue, try inserting a unity Gain block before the input port of the Voltage Measurement block.

Related Solutions

MATLAB: Do I receive a “There is no electrical measurement in your model” warning when I copy a model that has a measurement block in SimPowerSystems 3.1 (R14) and SimPowerSystems 4.0 (R14SP1)

This enhancement has been incorporated in SimPowerSystems 4.1.1 (R14SP3). For previous product releases, read below for any possible workarounds:

This issue is a known limitation in SimPowerSystem 3.1 (R14) and 4.0 (R14SP1). In these versions of SimPowerSystem, electrical measurement blocks are used to store the equivalent Simulink circuit that represents the electrical system that was built with SimPowerSystem blocks. Consequently, one of these blocks are required in the model to run the simulation. Although there are voltage measurement blocks in the copied subsystem, the subsystem is linked to a library, making it a library block. In theory, SimPowerSystem will need to modify the internal contents of this block before the simulation starts but because this is a library block, its contents cannot be modified (a library/link principle). Consequently SimPowerSystem will disregard the measurement block within this subsystem. This situation results in the display of the mentioned warning when the simulation starts.

To workaround this issue, add a Multimeter block outside of the copied subsystem or create a subsystem in the new model and copy the block under it.

MATLAB: Is it possible to create a time-varying element in SimPowerSystems 2.3 (R13.0.1)

An example model has been created to show an example of a variable inductor block built using Simulink blocks and SimPowerSystems blocks. This model can be accessed by selecting Demos from the Help menu, or by executing the following command in MATLAB:

open power_variableinductor

Right-click on the Variable Inductance block and select "Look Under Mask" to see how the block implements a variable inductor from the differential equations describing the element's operation.

Best Answer

Related Solutions

MATLAB: Do I receive a “There is no electrical measurement in your model” warning when I copy a model that has a measurement block in SimPowerSystems 3.1 (R14) and SimPowerSystems 4.0 (R14SP1)

MATLAB: Is it possible to create a time-varying element in SimPowerSystems 2.3 (R13.0.1)

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