VOLTAGE AND FREQUENCY CONTROL OF SEIG FOR STAND ALONE RENEWABLE ENERGY SYSTEM

K.Sasikumar ¹, N.Chitra ²

¹PG student- Department of EEE – S.K.P Engineering College, Thiruvannamalai,Tamilnadu, India.

² Assistant Professor- Department of EEE – S.K.P Engineering College, Thiruvannamalai,Tamilnadu, India.

            Induction generators are increasingly being used in nonconventional energy systems. The advantages of using an induction generator instead of a synchronous generator are well known. Some of them are reduced unit cost and size, ruggedness, brushless (in squirrel cage construction), ease of maintenance, self-protection against severe overloads and short circuits, etc. In isolated systems, squirrel cage induction generators with capacitor excitation, known as self-excited induction generators (SEIGs), are very popular. This paper discusses the regulation of the voltage and frequency of a stand-alone wind energy conversion system (WECS) based on a self-excited squirrel-cage induction machine. The proposed new closed loop PWM controller (AC-DC-AC) is used to maintain constant voltage and constant frequency at the output of the generator against varying rotor speed, changing load conditions and  as well as to generate optimum power from the induction generator. The feasibility of the proposed system is simulated by using MATLAB/ Simulink.

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GSM BASED AUTOMATIC ENERGY METER READING & LOAD CONTROL

S.Balaji ¹, S.Jegedeeswaran ²,  M.Rajeshwaran ³,  V.Kumarasamy ⁴

^{1 2 3}UG student- Department of EEE – Vickram College of Engineering, Enathi Tamilnadu, India.

⁴Assistant Professor - Department of EEE – Vickram College of Engineering, Enathi Tamilnadu, India. 

           Traditional metering method for retrieving the energy data is not convenient and the cost of the data logging systems is high. So this paper presents of design and development of Automatic meter reading (AMR) system. AMR system is a boom for remote monitoring and control domestic energy meter. AMR system give the information of meter reading, power cut, total load used, power disconnect and tempering on request or regularly in particular interval through SMS. This information is being sent and received by concerned energy Provider Company with the help of Global system for mobile communication (GSM) network. Energy provider receives the meter reading within a second without visiting person. AMR minimize the number of traditional visits required by employs of energy Provider Company. This system not only reduces the labor cost but also increase meter reading accuracy and save hugs amount of time.

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