Interface of Inverter with Grid

International Journal of Research and Scientific Innovation (IJRSI) | Volume V Issue I, January 2018 | ISSN 2321–2705

Interface of Inverter with Grid

Jay R.Ray¹, Nilaykumar A.Patel^{2
1, 2} M&V Patel Department of Electrical Engineering, Charotar University of Science & Technology, Changa, Gujarat, India

Abstract— The main scope of this paper is to interface of inverter with grid by using control techniques. The Current reference computation, PI controller, Current loop control, Phase Locked loop are used for control of inverter in this paper. The simulations for Line Voltage and current waveform are performed in MATLAB.

Keywords— Inverter Control, voltage source converter, SPWM Technique, Phase locked loop, Micro grids, PI Controller

I. INTRODUCTION

The requirement of reliable and flexible power system with modern control and communication system and power electronics has led to development of smart grid concept. Power electronics are enabling technology to convert classical power systems into smart grids. They allow controlling the power flows and bus voltages in the milliseconds.

Inverters based on Insulated-Gate Bipolar Transistors that provide fast switching and modulate any desired voltage. The Converters called Voltage Sourced Converters (VSC). They Control independently active and reactive power. They provide black start capability and injected reduced harmonics Currents allowing to use lighter filters.

Inverters based on thyristor called line commutated converters which can control active power while consuming non controllable reactive power, require the grid to be operated and require large filters for the harmonic current they generate. The main advantage is they are available for higher voltage and power and they produce less losses.

There are various control techniques useful for active and reactive power control of grid connected distributed generation systems.

II. SYSTEM DESCRIPTION

The model of Interface of Inverter with grid shown into figure 1.

The connection between grid and converter is also shown in figure 1.

In the control system use of current reference computation, Current loop control, Phase locked loop, Sinusoidal pulse width modulation (SPWM) technique.

The gate signal to IGBTs are given by using SPWM technique in Control of inverter.

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