Modeling Three-Phase Short-Circuits for Radial Distribution Systems

Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2018, Vol 42, Issue 0

Abstract

Monitoring radial distribution systems in shortcircuit conditions represents a quite important issue of electric power networks supplied by renewable sources. The method presented in the paper aims to establish in laboratory conditions, using the similitude criteria, the real value and the duration of a three phase short-circuit current acting in renewable sources connected to the electric grids. Since, due to the high values of the short-circuit currents it is difficult to test the operation of the relays in situ, for instance in transformer stations or substations, it is mandatory to test and set using the injection of secondary currents. Consequently, the paper presents the modeling of a real grid, in order to emulate, as accurate as possible. The results of the measurements, reported to the real grid, represent the real ones, existing at the three phase short-circuit level. Therefore, even from the early phase of design, one may choose the breaking equipment, capable to face the conditions of dynamic and thermal stability. Since the reporting factors are known, along with the possibility of using the accurate reported value of the real short-circuit current on the model, the tests on model present advantages in relation to the use of the devices of secondary currents injection. The results of the measurements on the model confirm the viability of the last testing method here depicted.

Authors and Affiliations

Horia Balan, Mircea Ion Buzdugan, Liviu Neamt

Keywords

Related Articles

 Study of Low Power Alternating Current Motors by Functional and Energy Aspect

 The objectives followed in the frame of this paper are to approach comparatively the two types of motors, from the view point of operation performances and of exploitation expenses obtained with them (asynchronous...

Extended Study Regarding Sustained Transfer Rate for 802.11 Wi-Fi Communications With Partially Overlapped Channels Interference

This paper extends the pervious studies of the authors on the 802.11 Wi-Fi Communication regarding the influence on the sustained transfer rate caused by the existence of the Partially Overlapped Channels (POCs) inter...

ELECTROMAGNETIC FIELD DISTRIBUTION IN VICINITY OF POWER LINES ABOVE REAL EARTH

A method for electromagnetic field components calculation in vicinity of power lines is presented. The electromagnetic field distribution of 2x110 kV power line, which is commonly used in Serbian electric power system, i...

An Analysis on Efficiency of Wireless Transfer Energy Due to a Misalignment of Two Coils

Function of the alignment of the two magnetic coupled coils, a procedure, to choose the proper structure of the two coils used in the wireless power transfer systems (WPTS’s), is presented. The deviation in the alignment...

A "SMARTGRIDS-ASSISTANT" FOR POWER GRID OPERATION AND TRAINING

SmartGrids are understood as cell-wise structured, intelligent supply areas with own, distributed and renewable generators and storages. The actual intelligence is the IT-supported structure and control, especially to ma...

Download PDF file
  • EP ID EP433239
  • DOI -
  • Views 148
  • Downloads 0

How To Cite

Horia Balan, Mircea Ion Buzdugan, Liviu Neamt (2018). Modeling Three-Phase Short-Circuits for Radial Distribution Systems. ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica, 42(0), 140-146. https://europub.co.uk/articles/-A-433239