An advanced STATCOM model for optimal power flows using Newton's method

Abstract

(2014) 'An advanced STATCOM model for optimal power ows using Newton's method.', IEEE transactions on power systems., 29 (2). pp. 514-525. Further information on publisher's website:http://dx.doi.org/10.1109/TPWRS.2013.2287914Publisher's copyright statement: c 2014 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.

Short-term optimal hydrothermal scheduling with power flow constraint

“…(8), and the fuel cost of * X is less than the other particles. The power flow constraint is an equality constraint.…”

“…The STOHS problem is a dynamic optimal power flow(OPF) problem essentially after taking the power flow constraint into account. There are only a few scholars who have added power flow constraint in the optimal hydrothermal scheduling model [7].Although Newton method and interior point method are usually used to solve the OPF problem [8][9] , both of the two methods have difficulties in solving the STOHS problem. One vital point of the difficulties is that the two methods are base on the condition that the objective function is derivable or differentiable.…”

Operational planning and optimisation in active distribution networks using modern intelligent power flow controllers

“…The basic 3-phase full bridge voltage source converter shown in Fig (1a) forms the essence of the mathematical model presented here which is an extension of the model presented in [14][15]. It has been observed that for purposes of efficient computational modelling the converter could be represented as essentially an ideal transformer with complex tap ( ) whose magnitude corresponds to the actual PWM amplitude modulation ratio and phase shift corresponds to the actual phase shift, relative to system reference, that can be exerted at the output AC voltage (RMS, line-line).…”

“…It has been observed that for purposes of efficient computational modelling the converter could be represented as essentially an ideal transformer with complex tap ( ) whose magnitude corresponds to the actual PWM amplitude modulation ratio and phase shift corresponds to the actual phase shift, relative to system reference, that can be exerted at the output AC voltage (RMS, line-line). For an actual VSC with a DC input voltage of dc E the AC output voltage at converter terminals then becomes:  For a two-level converter k ≈ 0.612 and this model can be extended for any type of converter at any switching level [15]. The advantage of this model is that it combines both DC and AC sides on one single frame of reference for efficient load flow calculations.…”

“…It also does not neglect the operational limits imposed on the converter for linear operation (i.e. 0 ≤ m a ≤ 1) [15]. The converter in the linear region is then able to provide independent active and reactive power through controlling its AC output terminal voltage.…”