The interline power flow controller (IPFC) can control the active and reactive of different lines in system. To utilize flexible ability IPFC increase damping characteristic its AC system, this paper proposes a low-frequency oscillation (LFO) suppress method through IPFC. LFO is designed by adding supplementary signals to outer current loop In addition signals, are also added related loop, whic...

This paper, proposes a control system for use with microgrid consist of multiple small scale embedded generation networks (SSEG networks) connected to the 33kV distribution network. The proposed controller controls power flow in the gridconnected mode of operation, enables voltage and frequency control when the SSEG networks are islanded, and resynchronizes the SSEG networks with the utility be...

In order to solve the problems of protection misoperation and refusing operate caused by lack measurement information in smart substation, a substation method which can effectively eliminate influence transformer inrush current bus CT saturation when connecting line is missing proposed. Through theoretical analysis synthesis based on Kirchhoff law, it proved that will lead misjudgment different...

This paper presents a photovoltaic (PV) based battery charger utilizing wireless power transfer (WPT) interface system. The double-sided inductor-capacitor-capacitor (LCC) compensation network is utilized for the inductive (IPT) Because of nonlinear characteristics PV, maximum point tracking (MPPT) achieved by controlling phase displacement angle or pulse width quasi-square inverter connected t...

Abstract. In this paper are study the modeling of a three phase electric arc furnace installation. It is well know that the electric arc is a nonlinear element. Thus, for modeling his behavior, the authors are using a model which parameters like of a real electric arc. For simulation it was use the PSCAD EMTDC program. The simulations results are comparing with the measurements made of a 100t e...

Abstract Due to the special meteorological conditions of offshore wind power generation and large turbines used, doubly-fed have larger shafting elastic coefficients than onshore turbines. When farm is connected grid through MMC-HVDC, two kinds sub-synchronous oscillations are caused. One natural torsional vibration turbine shaft system, other oscillation caused by interaction between devices i...

In this article, a novelty control structure of grid-connected doubly-fed induction generator (DFIG) based on function link (FL)-based Wilcoxon radial basis network (FLWRBFN) controller is proposed. The back-propagation (BP) method used online to train the node connecting weights FLWRBFN. To improve learning capability FLWBFN, differential evolution with particle swarm optimization (DEPSO) tune...

The estimation of flicker emission by a wind park is a complex issue because the network is shared with other loads or generators, even with other wind parks, which contribute to the flicker level. This estimation can be done by means of simulation as depicted in international standards, where the wind turbine generator (WTG) is simulated with a fictitious network, and the results of flicker em...

The switching behavior of vacuum switches (VS) is different to that of other circuit breakers. There are several effects which have to be taken into account, for example the current chopping, the dielectric strength of vacuum gap, the arc voltage, the quenching capability of high frequency currents, virtual current chopping and prestrikes. In some earlier investigations the characteristics of v...