MATLAB: How to covert alpha-beta component to seperate signal quantities

abc to alpha-betasimulink

I'm trying to seperate 3 phase alpha-beta components to individual signals but even using the demux block it is not getting seperated. The first scope is displaying the alpha beta components together whereas the second scope is displaying some wierd plot. What is the possible solution to zseperate the alpha beta components.

Best Answer

The output of the abc to Alpha-Beta-Zero block has 3 signals (alpha, beta and zero). Change the number of outputs to 3 on your demux block.

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MATLAB: How to plot this implicit function

Try symbolic expression

clc,clear
alpha=1.5; A=0.0207; gamma=0.25;
syms beta eps
x = (beta-alpha*(beta-gamma)+sqrt((beta-alpha*(beta-gamma)).^2+4*alpha*beta*gamma*A))./(2*beta);
y =  x.*(1-x).*beta/gamma;
t =  -x+x.*y.*(alpha-eps*beta)./((A+x+y).^2);
d =  eps*beta.*x.*y.*(x.^2+(A+x).*x+A*alpha)./((A+x+y).^3);
    % convert symbolic expression to function handle
F = matlabFunction(t.^2 - d,'vars',[beta eps]);
ezplot(F,[0,1,0,1]);

MATLAB: Solve an expression and plot

beta = 0.85; gamma = .15; theta = 0.1;
alpha = .303: .001: 5;
syms Alpha delta
A = -Alpha * beta + Alpha .* delta + gamma * beta + beta;
B = Alpha .* theta * (beta - delta) + gamma * beta;
rr = solve( A^2 - 4*B*beta, delta);
rrt = double(subs(rr, Alpha, alpha(1));
[maxrrt, idx] = max(rrt);
maxrr = rr(idx);
rrpos = double(subs(maxrr, Alpha, alpha));
plot(alpha, rrpos)

Best Answer

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MATLAB: How to plot this implicit function

MATLAB: Solve an expression and plot

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