There is no easy way to include variable series reactance to the problem MATPOWER solves. This would involve a rather deep modification to the non-linear network equations, Jacobian and Hessian matrices. MATPOWER's user-defined variables can only be included in user-defined linear constraints. They can't modify the non-linear constraints.
-- Ray Zimmerman Senior Research Associate B30 Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Aug 16, 2013, at 9:07 AM, Jiashen Teh <[email protected]> wrote: > Dear Dr Ray, > > Allow me to restructure my question. So you only need to refer to this email > and not the earlier ones. > > I am trying to model variable reactance in series of a line which acts like > TCSC (A series FACTS device) > Its working behaviour is simply govern by such inequality constraints: Xmin > <= Xtcsc <= Xmax > > In effect, I am expecting matpower to use newton rahpson method ( or any > other iteration method ) to solve the value of Xtcsc which will add with line > reactance as the TCSC and line is connected in series. > > My question is how can I add the additional inequality constraints: Xmin <= > Xtcsc <= Xmax in MATPOWER? > > I have read the manual several times, but I cannot get the idea. Please help. > Thanks in advance a lot > > > Yours sincerely, > > Jiashen Teh > PhD Student > Electrical Energy & Power Systems Group, School of Electrical & Electronic > Engineering > Ferranti Building (B18), The University of Manchester, M13 9PL, United Kingdom > Tel: +44 (0) 161 306 2263; Mobile: +44 (0) 792 322 4864 > From: [email protected] > [[email protected]] on behalf of Jiashen Teh > [[email protected]] > Sent: 16 August 2013 11:00 > To: MATPOWER discussion forum > Subject: RE: variable series reactance and variable shunt susceptance > > Dear Dr Ray, > > FYI, i have also read the manual, but I am not too sure of how I can include > user define variables (such as those I described in first email below) > > I would appreciate if you could explain how this can be done. > > > Yours sincerely, > > Jiashen Teh > PhD Student > Electrical Energy & Power Systems Group, School of Electrical & Electronic > Engineering > Ferranti Building (B18), The University of Manchester, M13 9PL, United Kingdom > Tel: +44 (0) 161 306 2263; Mobile: +44 (0) 792 322 4864 > From: [email protected] > [[email protected]] on behalf of Jiashen Teh > [[email protected]] > Sent: 16 August 2013 10:19 > To: MATPOWER discussion forum > Subject: variable series reactance and variable shunt susceptance > > Dear Dr Ray, > > I wish to include variable series reactance and variable shunt susceptance, > > May i know how does MATPOWER facilitates the inclusion of this ? > > > Yours sincerely, > > Jiashen Teh > PhD Student > Electrical Energy & Power Systems Group, School of Electrical & Electronic > Engineering > Ferranti Building (B18), The University of Manchester, M13 9PL, United Kingdom > Tel: +44 (0) 161 306 2263; Mobile: +44 (0) 792 322 4864
