A Similarity Comparison Based Pilot Protection Scheme for VSC-HVDC Grids Considering Fault Current Limiting Strategy [PDF]
Journal of Modern Power Systems and Clean Energy, 2023 In the voltage source converter based high-voltage direct current (VSC-HVDC) grids, fast and reliable protections are the key technologies. The traditional protection schemes are easily affected by fault resistance, line distributed capacitance, etc ...
Keao Chen +5 more
doaj +2 more sources
Fault Characteristic Analysis and a Novel Pilot Protection Scheme for Pole-to-Ground Fault in Flexible DC Distribution Network [PDF]
IEEE Access, 2023 Due to the pseudo-bipolar structure of the flexible DC distribution network, the short-circuit current caused by a pole-to-ground fault is weak. The fault characteristics, particularly the steady-state fault characteristics, are not prominent. Therefore,
Hao Qi +6 more
doaj +2 more sources
Enhanced transmission line pilot impedance and pilot protection
IET Generation, Transmission and Distribution, 2011 This study proposes a novel pilot protection for transmission lines by using enhanced transmission line pilot impedance (ETLPI). The ETLPI is defined by the ratio of the voltage difference of fault-superimposed component to the current summation of fault-superimposed component at both terminals of the protected line and used to distinguish the internal
J. Xia +5 more
exaly +2 more sources
Elektronika ir ElektrotechnikaBattery energy storage station (BESS) possesses flexible operating states and complex fault characteristics. With the continuous increase in its installed capacity and number, the risk of maloperation of traditional relay protection significantly ...
Ping Xiong +5 more
doaj +2 more sources
Evaluation of a pilot consultation for maternity protection at work in Switzerland
Swiss Medical Weekly, 2022 STUDY AIMS: Switzerland’s Labour Law and its Ordonnance on Maternity Protection aim to protect the health of pregnant employees and their unborn children while enabling them to continue to pursue their professional activities. Some companies encounter difficulties implementing the law’s provisions.
Krief, P. +7 more
openaire +6 more sources
A novel pilot protection method for UHVDC transmission lines based on U-I characteristics
Energy Reports, 2023 As one of the principal protections of UHVDC transmission lines, pilot protection requires strict synchronization and small data flow by exchanging the current on both terminals under the limitation of DC protection action rapidity. To solve this problem,
Hong Tan +4 more
doaj +3 more sources
Novel setting-less pilot protection for MMC HVDC grids
International Journal of Electrical Power & Energy SystemsThe determination of a suitable threshold is challenging for most of existing pilot protections of MMC HVDC systems. There are two kinds of setting-less pilot protection among the existing research: current polarity-based and inductor voltage-based pilot
Chenhao Zhang +3 more
doaj +3 more sources
Effectiveness of a Knowledge-Oriented Educational Intervention on Air Pollution Health Protection Among Primary School Students: A Pilot Pre-Post Study. [PDF]
Risk Manag Healthc PolicyLv Y +11 more
europepmc +3 more sources
Frequency Domain Impedance Based Protection for Flexible DC Distribution Grid
IEEE Access, 2022 The flexible DC distribution grid is suitable for distributed energy resource integration and DC load power supply. However, the fast-increasing fault current has a great impact on the system when a short circuit fault occurs.
Xiuyan Wei +3 more
doaj +1 more source
IET Generation, Transmission & Distribution, 2023 The unnecessary prolonged operating time of conventional current differential protection under high‐impedance DC line faults is an important issue affecting the continuity of power supply.
Ali Khaleghi‐Abbasabadi +3 more
doaj +1 more source