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This work proposes a load transfer scheme for radial distribution feeders with distributed generation units. A distribution feeder may be operated with distributed generation units in parallel. Conventional load transfer schemes do not consider this kind of operating condition. Hence, they are not suitable for power distribution systems including distributed generation units. In this paper, the load...
In this paper, a delta-connected DSTATCOM with cascaded H-bridge multilevel inverter is proposed for real-time load power factor correction in power distribution systems. First, a feed forward compensation scheme is developed for the DSTATCOM for fast response requirement. Then, the DSTATCOM is built and simulated with Matlab/Simulink program. Accordingly, a hardware prototype is constructed by using...
This paper deals with power quality improvement by using a combination of passive filters and UPQC in power systems. Passive filters are a common method to compensate harmonics and reactive power. However they have drawbacks such as limited band width, the effects of system impedance on compensation characteristics. UPQC is a high efficiency solution to overcome the passive filter restricts; nevertheless...
In this paper, two Adaline-based schemes for identifying the harmonic currents generated by nonlinear loads in power distribution systems are presented. Each neural method is based on formalized expressions of the active and reactive instantaneous powers. In both methods, the expressions of the instantaneous powers are learned on-line by Adalines. The amplitude of each harmonic term is thus individually...
In order to compensate more reactive power and lower the power level of the active power filter (APF), a hybrid filter system based on a combination of an APF and a thyristor switched capacitor (TSC) is presented. This system combines the good dynamic compensation performance of the APF and higher power level of the TSC. It can eliminate harmonics and compensate the power factor effectively in power...
This paper presents a new modified Walsh function (WF) based method for the measurement of reactive power (RP) in sinusoidal as well as in noise conditions. Proposed method simplifies the multiplication procedure to evaluate the reactive components from instantaneous power signal using peculiar properties of the WF. One of the advantages of proposed measurement approach is that in contrast to the...
An investigation of the effect of voltage and current harmonics on the accuracy of readings of energy meters was carried out. Harmonic distortion is one of the power quality problems, which typically arises from the consumer's electrical equipment. Such harmonics produced by discontinuous conducting devices and non-linear loads create recognized problems for most power distribution systems. These...
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