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Loss allocation to each user based on fair and justice is the main content of electrical power transmission cost reasonable allocation in Electricity Market. Making use of the uniqueness of Shapley value and distinctive features of shapley theorem, power sources and load are regard as players in a union. That is transform power source to equivalent voltage source and load to impedance based on Thevenin...
This paper makes a study of an algorithm of fault location for double transmission line on the same tower. The algorithm is based on model of distributed parameters. The location equation set is deduced and the solving of the equation set is researched.
The no-load steady-state performance of a Y-connected three-phase induction generator under single-phase operation is studied, and the effects of combination between balance capacitors and excitation capacitors on the terminal voltage are analyzed. The loop impedance equation is obtained by employing the symmetrical component method. With both real and imaginary parts of the loop impedance equal to...
On the basis of the modified nodal analysis, universal matrices-stamps are defined for modeling several types of current conveyor. From these stamps, the so-called Dragonfly Mason-Coates' graphs are derived for a fast hand-and-paper symbolic analysis of current-conveyor circuits.
Stochastic assessment is a method to predict the severity and number of voltage sags at a bus of interest in the transmission network. In this paper, a technique using impedance matrix for stochastic assessment was developed to predict the voltage magnitudes due to faults at any bus in the electrical network. The proposed technique was applied to IEE 24- bus electrical network to illustrate its application...
This paper describes an implementation of a beam former monolithic microwave integrated circuit (MMIC) for the SKA demonstrator project known as EMBRACE using the SG25H1 silicon germanium process of IHP microelectronics. This process is qualified as a high-performance technology with npn-HBTs up to ft/fmax = 180/220 GHz.
The load response of two-wire transmission line excited by a uniform plane wave with arbitrary direction is discussed. From the transmission-line theory, a general equation of the load response is deduced with the help of BLT (Baum-Liu-Tesche) equation and Agrawal model of Telegrapher's equations, and numerical examples are given to validate the method. The superiority over the full-wave method is...
LCL filter offers a better choice of attenuating switching frequency harmonics, since compared with L or LC filters the value of required inductance is smaller. But LCL filter may cause resonance which is a disaster for the systempsilas stability. In order to solve the problem, a two-current-loop control strategy which includes grid-current outer loop and filter-capacitor-current inner loop is used...
This paper focuses on ideal operation status of the parallel inverter system. The limitation of conventional conclusion about ideal operation status of parallel inverters is discovered. And a new conclusion is introduced, that there will be no circulating current among parallel inverters when their unattached output voltages have the same frequency, phase, amplitude and be uniformly modulated. Simulation...
In the paper, a novel principle of variable reactor with a transformer and inverter control is proposed. A transformer with air gap is chosen and its primary winding is connected in series or parallel in power utility, the primary winding current of the transformer is detected and functioned as the reference signal. A voltage source PWM inverter is applied to produce a voltage, which is a controlled...
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