the growth in electronic devices applications increasing the non linear loads in power systems because most of these devices involve uses regulated power supply such as SMPS, Choppers etc. but because of the non linearity involved with the controlling process it produces undesired harmonics and reactive components which causes the heating, vibration electromagnetic interference etc. hence to mi...

The article presents a description of models and results research on separate joint effects unbalanced non-linear loads the operation lower-power synchronous generator. modeling generator included automatic regulators excitation rotor speed. For our studies, we used computer built in MATLAB environment Fazonord package, as well physical model low-power simulation attested to occurrence followin...

In this paper, a supervisory controller is proposed to manage the power flow in a hybrid AC/DC micro-grid for both grid-connected and disconnected modes. When the hybrid AC/DC micro-grid is connected to the utility grid, power surplus or shortage leads to power trade between the micro-grid and the utility grid. In the grid-disconnected mode, the renewable power sources (wind and solar generatio...

This paper presents a hysteresis band control for achieving maximum benefits from these gridinterfacing inverters when installed in 3-phase 4-wire distribution systems. The inverter is controlled to perform as a multi-function device by incorporating active power filter functionality. The inverter can thus be utilized as: 1) power converter to inject power generated from RES to the grid, and 2)...

With the development of modern industrial technology a large number of non-linear loads are used in power system, which causes harmonic distortion in the power system. At the same time the power quality and safe operation becomes inferior. Therefore mitigation of harmonics is very necessary under the situation. This paper presents the design of two passive filters to reduce the current harmonic...

Use of nonlinear loads at high voltages has increased tremendously in industry. These non-linear loads distort power quality by generating harmonics. Conventional active filters have limitations in high power high voltage systems. Use of multilevel inverter in active filters effectively reduces harmonics in high voltage systems eliminating need of high cost and bulky transformer. This paper pre...

student details: name:T.kavitaha rollno: 09a01d4302 nova college of engg& technology vegavaram, jangareddigudem, westgodavari, andhrapradesh phno:09440182883 email:[email protected] 1. Abstract. The abundant use of Non-linear loads in distribution system leads to power quality issues, The proliferation of microelectronics processors in a wide range of equipments, from home VCRs and d...

In this paper, the implementation of a shunt active power filter with a small series reactor for a three-phase system is presented. The system consists of multiple non-linear loads, which are a combination of harmonic current sources and harmonic voltage sources, with significant unbalanced components. The filter consists of a three-phase current-controlled voltage source inverter (CC-VSI) with...

background and aim: it has been several decades since the technology of frequency lowering (fl) has been proposed. however, primary research has revealed no benefits regarding the use of this technique. currently, new methods for fl and improvement of perception of speech and fricative sounds have led to the application of these methods by numerous companies to produce hearing aids. in this stu...

This paper presents a new control scheme of voltage source active filter (AF) which compensates simultaneously the harmonics and reactive power of non-linear loads. The reference compensating currents are estimated from computed reference supply currents and sensed load currents. Reference supply currents are estimated using active power of the load and the AF. A hysteresis or carrier based PWM...