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# Gert Kruger

##### Last seen: 19 days ago
22 total contributions since 2015

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Submitted

Resonant DC-link inverter simulation models
Various resonant DC-link inverter simulation models are explored using different controllers.

7 months ago | 10 downloads |

Submitted

PV array with algebraic loop broken
PV array with filter corrected to solve the algebraic loop problem.

1 year ago | 47 downloads |

algebraic loop problem in PV array block
The reason why there is an algebraic loop: The V-Filter and I-Filter in the model, for the computation of Vd, is supposed to br...

1 year ago | 0

| accepted

Algebraic loop error in PV panels (in filter block)
The reason why there is an algebraic loop: The V-Filter and I-Filter in the model, for the computation of Vd, is supposed to br...

1 year ago | 0

How to initialize outpt of a matlab function block in simulink to zero
You can add a persistent variable and check if it is empty. If it is empty, then it means it is the first time the Matlab functi...

1 year ago | 0

How to solve algebraic loop error??
PV panel model with fixed algebraic loop: https://www.mathworks.com/matlabcentral/fileexchange/71682-pv-array-with-algebraic-loo...

1 year ago | 0

How to connect two power grids in SimPowerSystem through DC_link?
Sorry, this answer is four years late: The 3-phase voltage sources you used to represent the grids are both tied to ground, t...

1 year ago | 0

Matrix interpolation in the direction of the third dimension
Here is my attempt at answering your question. I imagine that there are N matrices each with size nxn. Example matrices: %% n...

1 year ago | 1

Submitted

Newton-Raphson reciprocal approximation , 1/x and 1/sqrt(x)
The Newton-Raphson approximation of the reciprocal, i.e. 1/x and square root reciprocal is provided along with accuracy testing ...

1 year ago | 3 downloads |

why PV panels gives algebraic loop errors?
The provided suggestion of the unit delay is a work around, but it does not provide the reason for the presence of the algebraic...

1 year ago | 2

Submitted

On-line simplex search
A reentrant version of the well-known Simplex search (Nelder-Mead) optimization is provided.

1 year ago | 3 downloads |

Solved

Create a square matrix of multiples
Given an input, N, output a matrix N x N with each row containing multiples of the first element of each row. This also applies...

1 year ago

Solved

Is my wife right?
Regardless of input, output the string 'yes'.

1 year ago

Solved

Given a and b, return the sum a+b in c.

1 year ago

Solved

Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

1 year ago

Solved

Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

1 year ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

1 year ago

Solved

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

1 year ago

Solved

Add a block to a model
Produce the following signal: <<http://blogs.mathworks.com/images/seth/cody/add-block-eqn.png>> In this case, the slope of...

1 year ago

Solved

Connect blocks in a model
Connect the blocks in the model to produce the following signal: <<http://blogs.mathworks.com/images/seth/cody/connect-blocks...

1 year ago

Submitted

Real time tunable filters
A library of first and second order filters whose parameters can be tuned in real-time.

3 years ago | 7 downloads |