A new hybrid analytical model (HAM) based on conformal mapping (CM) method and magnetic equivalent circuit (MEC) model is presented in this paper for electromagnetic modelling of cage rotor induction motors (CRIMs) used in electric submersible pumps (ESPs). For every operating point, the iron parts are modelled with a non-linear MEC model to calculate the equivalent virtual currents, which represent the influence of magneto motive force (MMF) drops and MMF sources in stator and rotor cores. The effects of the equivalent virtual currents on the air-gap magnetic field are then considered using the CM method and Hague's solution. This approach for calculating the air-gap field is also used to prepare a 3-D lookup table (3-D LUT) for each element of inductance matrix and derivative of inductance matrix in terms of rotor position. These LUTs are then used for transient modelling and analysis of CRIM under no-load and loading conditions. The accuracy of proposed HAM is validated by comparing the results obtained through HAM with corresponding results obtained from finite element method and experiment set-up. K E Y W O R D S conformal mapping (CM), hybrid analytical model (HAM), inductance, magnetic equivalent circuit (MEC) model, magnetic field, magnetic saturation This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
The application of static compensators (STATCOM) has been growing in transmission and distribution systems. This is basically followed for succeeding various objectives such as voltage stability, loss reduction, or reactive power control. However, making a decision on the best possible locations for STATCOMs can be achieved by arranging a combinatorial optimization problem, and solving it by heuristic methods such as genetic algorithm. It is also necessary to involve a suitable model of STATCOM for the power flow analysis, which takes into account the effects of the DC-link as well as the power losses and the modulation index of the converter. This paper applies the average model of STATCOM to the optimal placement of compensators for the IEEE 14-bus benchmark network. The genetic algorithm is programmed with MATLAB to seek the optimal locations of STATCOMs and their nominal values. This provides the possibility of simulating and analyzing a variety of cases in which power system issues such as losses, reactive power, and its loadability are investigated.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.