Shakti Singh

Power system transient stability improvement using Fuzzy-PI based STATCOM controller

A static synchronous compensator is one of the FACTS devices used to improve the transient stability of the power system. In this paper a two Fuzzy PI based controller is designed for STATCOM. One is designed for voltage regulator and other is designed for current regulator. For Voltage Regulator the inputs to the fuzzy based controllers are error i.e. difference between Vmeas and Vref and rate of change of error and the output is the ΔKp (change in proportional gain) and ΔKi (change in integral gain). The proposed controller is tested on two machine system using Matlab Simulink Environment. The Results are compared with conventional PI STATCOM Controller.

A review on optimization techniques for sizing of solar-wind hybrid energy systems

ABSTRACT Solar and wind are inexhaustible, abundant, environmentally friendly and freely available renewable energy sources. Integration of these two sources has always been a complex optimization problem which requires efficient planning, designing and control strategies. Many researchers have designed cost effective and efficient hybrid solar-wind energy systems by using various available software tools and optimization algorithms. With the advancement in artificial intelligence methods, various new optimization techniques have been developed in the last few decades. This paper presents state of the art optimization methods applied to hybrid renewable based energy systems. A brief introduction of each technique is presented along with papers published in different reputed journals. This article also reviews different power management, control strategies and multi-objective optimization methods used for hybrid wind-solar systems. A case study is presented to demonstrate the efficacy of some of the algorithms.

Controlling of consumer end voltage variation using PV power generation

Presently world facing crisis of power all over the world. For a comfort survival, mankind has to adopt different methodologies to over come this shortage and instability of different parameters in power system. Here, the most concern parameters are voltage and frequency variation. Moreover, voltage variated is a big issue in power system particularly distribution end voltage. This paper introduces a methodology of distributed generation (DG) i.e. using photo voltic (PV) power generation method which helps in stabilizing the distributed side voltage. This will also helps to reduce the dependency on mail grid by introducing the concept of DG. However, DGs are small power generators that can b placed any where in power system. However, different locations in distribution network are selected to place PV panels according to there individual panel capacities. Also, according to the load stresses and solar pattern, these energy sources respond toward the voltage variations. Proper synchronization and controlling is required between solar panels and distribution grid. The aim of this paper is to evaluate the effect of distributed voltage on the different buses mathematically.

Wind power: Future lies within

Icreasing demands of electricity, to reduce reliance on fossil fuels, reduction in greenhouse gases, increasing oil prices and climate changes are the main factors which motivate utilization of renewable energy technologies in the world. Wind Energy has made a significant progress over the last two decades and evolved as one of the mature and fastest growing renewable energy technology due to its nature of intermittent, inexhaustible, abundant environmental friendly source of electricity generation. This article discusses the history and basic of wind technology, i.e. trends in rating, size and technological advancement in wind turbines. In this article the progress of cumulative and annual installed wind power capacity in the world are also presented. Cost of electricity generated by wind has a sharp decline in the last decade, which makes wind power very much competitive with conventional technologies. In this paper the growth of wind power, future aspects and challenges in India have been also discussed in detail.