WIND AC INVERTER

Wind AC Inverter

This report has been submitted for assessment towards a Bachelor of Engineering Degree in Engineering in the Department of Electrical, Computer and Communications Engineering, London South Bank University. The report is written in the author's own words and all sources have been properly cited.

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ABSTRACT

Solar and wind AC inverters are omnipresent, freely available, environmental friendly, and they are considered as promising power generating sources due to their availability and topological advantages for local power generations. Hybrid solar-wind AC inverters, uses two renewable energy sources, allow improving the system efficiency and power reliability and reduce the energy storage requirements for stand-alone applications. The hybrid solar-wind systems are becoming popular in remote area power generation applications due to advancements in renewable energy technologies and substantial rise in prices of petroleum products. This paper is to review the current state of the simulation, optimization and control technologies for the stand-alone hybrid solar-wind AC inverters with battery storage. It is found that continued research and development effort in this area is still needed for improving the systems' performance, establishing techniques for accurately predicting their output and reliably integrating them with other renewable or conventional power generation sources.

Table of Contents

ABSTRACT2

Wind AC Inverter5

CHAPTER I: INTRODUCTION5

Background5

Extent of decentralization8

Grid-connected systems8

Stand-alone systems10

Grid-connected systems vis-à-vis stand-alone systems11

CHAPTER II: LITERATURE REVIEW13

Review of studies in GC and AC—current status13

Studies based on the comparison of both GC and AC systems14

Techno-economic and environmental feasibility analysis of GC and AC systems16

CHAPTER III: METHODOLOGY21

Meteorological data generation for feasibility study21

Time-series meteorological data21

Statistical meteorological data21

Engineering design of GC and AC systems23

Institutional design of GC and AC systems25

CHAPTER IV: RESULTS28

Policy measures and barriers for successful implementation of GC and AC systems28

Simulation modelling of hybrid solar-wind system components29

Modelling of photovoltaic system30

Modelling of wind AC inverter32

Modelling of battery storage system34

Criteria for hybrid solar-wind system optimizations36

Power reliability analysis37

System cost analysis38

Optimum sizing methods for hybrid solar-wind system39

Simulation and optimization software39

Optimization techniques for hybrid solar-wind system40

Brief summary of the optimization techniques51

CHAPTER V: CONCLUSION53

Conclusion53

REFERENCES54

Wind AC Inverter

CHAPTER I: INTRODUCTION

Background

Rapid depletion of fossil fuel resources on a worldwide basis has necessitated an urgent search for alternative energy sources to cater to the present days' demand. Another key reason to reduce our reliance on fossil fuels is the growing evidence of the global warming phenomena. Therefore, it is imperative to find alternative energy sources to cover the continuously increasing demand of energy while minimise the negative environmental impacts. Solar and wind AC inverters are being considered as promising power generating sources due to their availability and topological advantages for local power generations in remote areas. Utilization of solar and wind energy has become increasingly significant, attractive and cost-effective, since the oil crises of early 1970s.

However, a drawback, common to solar and wind options, is their unpredictable nature and dependence on weather and climatic changes, and the variations of solar and wind energy may not match with the time distribution of load demand. This shortcoming not only affects the system's energy performance, but also results in batteries being discarded too ...