Wenlei, The voltage angles for the OPF are akin to free variables (lower and upper bounds are -inf and inf respectively). There are various assumptions, formulations, and choice of control variables that an OPF can have. The ones that MATPOWER makes are described in Section 6 of the manual. Tap positions and shunt compensation are not yet supported as control variables in MATPOIWER's OPF. Any new contributions are always welcome!
Shri From: "Bai, Wenlei" <[email protected]> Reply-To: MATPOWER discussion forum <[email protected]> Date: Thu, 28 Aug 2014 18:46:03 +0000 To: "[email protected]" <[email protected]> Subject: control variables of 'runopf' >Hi, I try to understand the control variables in 'runopf' >when I execute results = runopf('case_ieee30'), the system has 6 >generators, 2 Shunts, and 4 transformers. >According to user manual, "resutls.x" are all the optimization variables >(total 72), including Pg (6), Qg(6), Va(30), Vm(30), however voltage >angles, and slack bus are not supposed to be control variables, and some >additional variables, e.g. Shunts and transformers > should be considered as control variables. >Question: how to interpret the control variables (72 total) that >Matpower shows to me? > > >Wenlei Bai >Electrical Engineering, Department of Electrical & Computer Engineering >Baylor University, One Bear Place #97356 >Waco, TX 76798-7356 >(254)405-3320 >[email protected]
