Showing 4 results for Fault Current Limiter
J. Barati, A. Droudi,
Volume 14, Issue 3 (12-2017)
Abstract
Fault location is an interesting subject in power grids. On the other hand, the application of fault current limiter (FCL) has been increasing in power network and causes some problems in operation of protection systems. This paper studies the application of FCL in power system and its effect on one-ended simple reactance fault location methods. In these methods, only voltages and currents of transmission line sending-end terminal which equipped with measuring equipment are used to estimate the fault location. Presence of FCL in the time of fault occurrence makes the existing reactance methods inaccurate and causes malfunction of fault location devices. In this paper, a new method has been proposed to improve fault location in transmission lines equipped with FCL. To evaluate the effectiveness of the proposed method, various faults on different locations of transmission lines have been applied to the simulated power grid. This method implies an irritation process to calculate the remote terminal impedance and subsequently, fault current and location. The accuracy and effectiveness of the proposed method have been proved through simulations.
Hamid Radmanesh, Amir Heidary, Seyed Hamid Fathi, G.b. Gharehpetian,
Volume 14, Issue 4 (3-2018)
Abstract
This paper proposes a novel Fault Current Limiter (FCL) for the application on distribution networks to control voltage sags at the Point of Common Coupling (PCC) during faults. This new FCL is based on series resonance including resonance transformer and series capacitor. So, by proper design of the series resonance LC tank, the fault current is limited to an acceptable level. The FCL operation is simulated using MATLAB software. In order to confirm the simulation results, a prototype structure is built and its measurement results are in agreement with the simulation results. The simulated and experimental results show that it is feasible to develop the FCL with low cost and high reliability.
Amir Heidary, Dr. Hamid Radmanesh, Soroush Akhlaghi, Kamran Ghorbanyan, Amir Hossein Moradkhani,
Volume 18, Issue 2 (5-2021)
Abstract
The use of scattered generation sources, capacitors and reactor banks is rised due to the development of distribution networks as well as rising demand for electricity. Determining the place of installation and capacity are two important factors that affect network power losses and improve network performance. Distributed power plants and reactors, if connected to the grid in an appropriate location, will have various effects, including loss reduction, improved voltage profiles, and increased network reliability. On the other hand, their lack of proper location on the network increases the losses and increases the cost of production and transmission. In this paper, the Zanjan Regional Power Network has been studied and identified with network protection approach. By reviewing the sensitivity of the test points for introducing the DC reactor, a DC reactor is introduced, and by applying the reactor to the points, a sample of the network is investigated and simulation and experimental results are given.
Dr Mohammadreza Soltanpour, Dr Hamidreza Radmanesh, Davoud Yousofian,
Volume 19, Issue 4 (9-2022)
Abstract
In the event of voltage sag at the nearing of a wind park, severe currents may pass through the power electronic devices of the Doubly Fed Induction Generators (DFIGs). Hence, according to the Low Voltage Ride Through (LVRT) requirements, the wind parks are allowed to disconnect from the network after a certain time. Therefore, to avoid such actions, the LVRT requirement of wind parks is considered to be enhanced in this paper. This aim is achieved by offering a novel objective function in order to find the optimum impedance of Superconducting Fault Current Limiter (SFCL). To evaluate the effectiveness of the proposed method, it is verified in MATLAB/SIMULINK and its great performance to amend the LVRT of such wind parks is corroborated by the simulation results.
