No abstract

With the recent advancement in the field of power electronics devices and an increasing number of nonlinear loads in the power system, the maintenance of good power quality at the consumers’ end is one of the major concerns of today’s power distribution systems. The introduction of a large number of power electronics devices in the system introduces power quality issues like voltage flicker, voltage distortions, harmonic distortions, voltage sag-swell, etc. Due to this, the maintenance of good power quality at the consumer end becomes a major challenge for distribution companies. The Custom power devices (CPD) have been used in the power system to address these issues and improve power quality. However, optimal placement and sizing of CPD is a challenge itself. In this paper, the optimal location and rating of CPD (STATCOM and APLC) have been determined using the APSO and JAYA optimization techniques, both of these techniques are known for their robustness. The main objective of the paper is to minimize the total harmonic distortion, total CPD size, harmonic transmission line loss, telephone influence factor, and motor load loss. Further, the performances of allocated CPD in controlling the voltage quality and reactive power are evaluated. The performance from the APSO and JAYA algorithm on an IEEE-16 bus and 69 bus distribution system has been compared to each other.

No abstract

No abstract

Multilevel inverters are an emerging area of research in the field of power electronic circuits and applications. It has many advantages like near-sinusoidal output voltage, lower total harmonic distortion (THD), reduced dv/dt stress, lower peak inverse voltage (PIV) and so on. But there are some associated problems as well such as cost, size complexity, and capacitor unbalance voltage. Here a novel nine level inverter topology has been proposed which addresses the issue of high no of switching and capacitor voltage unbalance. The proposed system has numerous advantages. The cost, size and complexity are reduced and the voltage unbalance problem is solved. The voltage stress across the switches is also reduced. The power loss distribution among the switches is optimum. So, the efficiency of the system is improved. Hence the overall system performance is improved. The system performs well for varying load like resistive, inductive as well as motor load. The stator voltage speed control of a single-phase induction motor has also successfully been achieved. The pulse width modulation PWM technique has been used for producing the switching pulses. The complete simulation analysis of these systems has been realized using MATLAB software. A comparative analysis of this system with the recently proposed systems has been done which shows significant advantages in all the above mention areas.

No abstract

In 3-phase 4 wire distribution system, imbalance phenomena arise because of disproportionate distribution of single-phase loads among three phases. To address this issue, distribution system requires equitable load sharing in each phase. In this paper, we proposed an intelligent system which can sense the loading in each phase and distribute the load proportionately in each phase of 3-phase 4 wire distribution system. In our proposed hardware, AI based micro-controller is used to sense the least loaded phase and gives command to relay module to connect the load to the least loaded phase whenever any new load is connected to the line. The load on each phase can be monitored in real-time with the help of IoT based data communication. The results of the proposed work shows that whenever any new load is connected to any phase, it automatically gets connected to the least loaded phase. This work is effective in balancing of load in each phase of 3-phase 4 wire distribution system.

No abstract