International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 |Mar -2017
p-ISSN: 2395-0072
www.irjet.net
Voltage Sag Compensation in Fourteen Bus System Using IDVR Ramesh.S1, Sarvanan.I2, Suresh.P3 1UG
Scholar, St Joseph College of Engineering, Chennai, Tamilnadu Scholar, St Joseph College of Engineering, Chennai, Tamilnadu 3Assistant Professor, Dept. of EEE, St Joseph college of Engineering, Chennai, Tamilnadu 2UG
---------------------------------------------------------------------***--------------------------------------------------------------------mitigating long duration voltage sag compensation, the maximum amount of real power which is supplied to for compensation or mitigation of sudden rise/dips in voltage the load is a deciding factor of DVR, while the reactive level under the usage of sensitive loads. To reduce VOLTAGE power is generated electronically by using VSI voltage SAGS different FACTS devices are used in distribution system injection from the DVR is an appropriate phase side. The DVR is fast, flexible and efficient solution for voltage advanced with respect to source side voltage can sag problem. For voltage compensation process involves a reduce energy consumption. For some phase advance injection of real power into the distribution system. For technique alone, energy requirement cannot be met. compensating long duration sags the availability of new DVR Therefore for mitigating deep long duration sags, as it topology results in DVR energy storage capacity. This paper is merely a way of optimizing existing energy storage. proposes a new device namely interline dynamic voltage By dynamically replenished the DC link of the DVR that restorer (IDVR) with a common DC link. .The objective of this can be capable of mitigating deep sags with long work is to improve the real and reactive powers by employing durations.
Abstract - Dynamic voltage restorer (DVR) has been used
IDVR fourteen bus systems with line interruption with and without IDVR are simulated then the results of voltage sag compensation, real power and reactive power are compared and tabulated using MatLab/Simulink and the simulation results are presented.
The Interline IDVR proposed in these paper provides a way to replenish the energy in the common dc link energy storage. For protecting several sensitive loads in different distribution feeders emanating from different grid substations. Then it consists of several DVRs and all that DVRs are connected to a common dc link. The control system of DVR plays a important role for the requirement of fast response in the control of voltage sags and variation of connected loads. In these controller is used to control the DVR. The novel minimal energy consumption strategy for the DVR is proposed in two different voltage distribution system are protected using two DVR’s. The first is a low voltage DVR operating in voltage sag mitigation mode injecting active power from the DC link capacitor. In that time other medium voltage DVR keeps the voltage of the Dc link capacitor constant the optimum rating for two DVR’s when used for IDVR system is designed.
Key Words: Interline dynamic voltage restorer (IDVR), Dynamic voltage restorer (DVR), Voltage sag, Power quality, Fourteen Bus 1. INTRODUCTION
Nowadays, power electronics plays a vital role in transmission lines and industries. Because of the very sensitive and less tolerant equipment are used. Therefore for a short time, voltage sag occurs in these places. Voltage sag is created by connecting an additional load in parallel with the exiting load. Among the several novels, the dynamically voltage restorer is one of the power electronics devices which is technically advanced over economical for voltage sag mitigation in distribution system. The DVR works by injecting ac voltage in series with the incoming supply voltage, the purpose of which is used to improve voltage quality. DVR involves injection of real and reactive power to the distribution system to compensate the voltage sag problems which determines the capacity of the energy storage devices. In order to meet the real power requirement an external energy storage is required especially for © 2017, IRJET
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2. Basic Operational Principles of DVR and IDVR 2.1 DVR-Dynamic Voltage Restorer DVR is a distributed voltage DC to AC solidstate switching inverter that injects three phase ac output voltage in series with the distribution feeders using series injection transformers. When we are injecting this power DVR can restore the quality of three phase AC voltage at it load terminals. When the |
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