The paper develops analytical expressions for the admittances and impedances of a Static Synchronous Compensator (STATCOM) as a function of frequency. The expressions include the conventional positive and negative sequence admittance as well as transfer admittances where a positive sequence current generates a negative sequence voltage at another frequency. These results are then corroborated using the tool of electromagnetic transients simulation. The expressions are shown to be valid for six-pulse as well as higher pulse number configurations. The impact of the STATCOM's control system on the admittance is also investigated.

There are many acceptable approaches ranging from light to moderate intravenous sedation or analgesic drugs that are used to provide pain control in dilatation and curettage. We report the use of hypnosis as a nonpharmacologic approach to control pain in this manner.

The paper describes a technique to control the harmonic output of a Static Synchronous Compensator (STAT-COM) using a Pulse Width Modulation (PWM) scheme with a minimal number of additional switchings. A neural network algorithm is developed to define the switching instants. This technique offers an alternative to the multi-pulse techniques that require complex magnetic circuit arrangements as well as to the conventional P W M technology that requires a large number of switchings. &?wort& Static Synchronous Compensator, STATCOM, Optimal P W M , Artificial Neural Networks, ANN, harmonic reduction, reactive power.

No abstract

An optimal PWM scheme is used to control a voltage source inverter. The switching angles are controlled by a feed forward artificial neural network in a way that all non-triplen harmonics up to the 29 are completely removed from the output and the amplitude of the fundamental is set at the desired level. The neural network is emulated by a TMS320C30 DSP board along with the other parts of the control unit of the inverter. th

No abstract

No abstract

No abstract