A Study on Management Standards of Total Harmonic Distortion(THD) measured from UPS Jeong,Un ho Department of Electrical and Electronic Engineering Graduate School,Dongshin University-South Korea

A Study on Management Standards of Total Harmonic Distortion(THD)measured from UPS Jeong,Un ho 
 Department of Electrical and Electronic Engineering Graduate School,Dongshin University
 ABSTRACT

  The purpose of this paper is to describe UPS(Uninterruptible Power Supply) in a comprehensive measure THD(Total Harmonic Distortion) and compared with domestic and international management standards in harmonics, harmonics reduction measures by analyzing the appropriate UPS technology. Harmonics generated by the UPS measurements of national standards was confirmed appropriate, UPS comprehensive harmonic currents measured range THD-I limits for national standards, the reference by KSC 4310, THD-V for domestic not based on the site was confirmed. 
Therefore,The IEEE(Institute of Electrical and Electronics Engineers)Std.519 is applied in this paper as a reference for domestic standards on THD-V limits management.In recent years,according to integration of KSC standards into IEC,UPS standards are being revised as KSC IEC 62040,but there are still no regulations for THD-V and THD-I about UPS causing confusions in some aspects.Accordingly,in the KSC IEC management standard stobe amended which are related to UPS,I consider the introduction of the integrated regulatory limits on THD-V and THD-I which are currently mixed to be very urgent. Therefore In this paper, we measured the THD-I and THD-V for UPS domestic and international management standards and harmonic comparison and analysis results were as follows.
 1. Three-phase and single-phase inverter of the UPS system being measured THD-I in the regulation of the country in accordance with the regulation within the KSC 4310 was confirmed that, THD-V is a provision of foreign IEEE Std. 519. Therefore, future established at the time of involving KSC IEC management standards associated with UPS, KSC 4310 and IEEE Std. 519 is possible to apply the integration.
 2. UPS also occur in both the voltage and current harmonics occurs mainly in lower-order active filters which were to enhance the harmonic reduction can be effective.

CONVERTER FLYBACK BATTERY CHARGER

APEC 2018 - full live-stream replay -Applied Power Electronics Conference 2018- IEEE.TV

 A full replay of the 2018 APEC Plenary Session, sponsored by Mouser Electronics.
 Index: 0:00:00 - Intro by APEC General Chair Eric Persson
0:01:30 - Special Announcement by PELS President Alan Mantooth
 0:06:40 - APEC 2018 overview (Persson)
0:12:35 - Plenary overview (Aung Tu)
 0:14:35 - Adam L. Hamilton - Power: A Fundamental Ingredient of Advanced Science and Applied Technology
 0:42:16 - Johann W. Kolar - Vienna Rectifier and Beyond
 1:13:35 - Muhammad Nawaz - Moving from Si to SiC from the End User's Perspective
 1:46:09 - APEC “Halftime Show” - special programming from IEEE.tv and Mouser
2:14:48 - Zoya Popovic - WPT: from µW/cm2 Harvesting to kW Capacitive Vehicle Powering 2:43:56 - P. Markondeya Raj - 3D Power Packaging made Real with Embedded Component and Substrate Technologies
 3:14:34 - Hans Stork - Does Power Efficiency Improve with Consolidation in the Semiconductor Industry?

 For more APEC content, visit: https://ieeetv.ieee.org/event-showcase/apec-2018

 LINK
http://ieeetv.ieee.org/conference-highlights/apec-2018-full-live-stream?rf=series|3&

Vienna Rectifier and Beyond - Johann W. Kolar, APEC 2018-Applied Power Electronics Conference 2018

Digital Circuit Simulation with Pspice

CONFIGURAÇÃO OU PROGRAMAÇÃO DO DSTM1

CONFIGURAÇÃO DO SETUP ANALYSIS

SIMULAÇAO

PSPICE PASSIVE VALLEY FILL CIRCUIT

The electronic ballast will use Passive Valley Fill configuration to reduce costs compared to standard PFC.

Development of the 3kW IGBT Switching Charger for the Lead-acid Battery of the Electric Forklift-LEE SEUNG-JUNG DEPARTMENT ELECTRICAL ENGINEERING SOONGSIL UNIVERSITY

Switch-Mode Power Supply Design - P.R.K. Chetty

LINK
http://www.mediafire.com/file/ykc91hx0k4o565x/Switch-Mode-Power-Supply-Design-Chetty.pdf

SIMPLE PWM inverter circuit SG3524(PWM)

A Study on the Wireless Parallel Operation of a Three-phase Modular UPS Inverter Seon – Tae Kim Department of Electrical Communication System Engineering Graduate School of Soonchunhyang University Asan, Korea

A Study on the Wireless Parallel Operation of a Three-phase Modular UPS Inverter Seon – Tae Kim Department of Electrical Communication System Engineering Graduate School of Soonchunhyang University Asan, Korea (Supervised by Professor Jun–Keun Ji) 

 This paper proposes a wireless parallel operation method of three-phase modular UPS inverter using resistive droop control. Control schemes for the parallel operation of UPS inverters can be classified into two types depending on the presence or absence of the communication line. In this paper, the wireless droop control method is used to overcome the disadvantages of the parallel operation method using communication line. Line impedance of low voltage grid such as parallel UPS inverter system is predominantly resistive. Hence, this paper uses resistive droop control method. And it uses the method holding the system frequency on 60  by applying Q-f(reactive power-phase angle) droop control that takes phase angle instead of frequency of output voltage. Furthermore, it applies a virtual resistor to droop control so that the output impedance of UPS inverter gets closer to resistive. It makes resistive droop control effective. This paper considers modular UPS using three-phase four-wire three-level NPC inverter. Because of symmetry of the circuit configuration, it can be modeled as a separate single-phase three-level inverter. From this, PR voltage controller with excellent control characteristics in single-phase inverter and PI current controller is used. The simulation using PSIM was performed in order to verify the validity of proposed algorithm. After consisting two-parallel system with three-phase modular UPS inverter, the experiment according to resistive load was conducted. It demonstrated the performance of current sharing and power sharing.