Results 181 to 190 of about 1,100 (215)

Field Measurement and Analysis of Frequency and RoCoF for Low-Inertia Power Systems

IEEE Transactions on Industrial Electronics
He Yin, Wei Qiu, Yuru Wu
exaly   +2 more sources

Performance of ROCOF protection in PV system

2016 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), 2016
Due to deregulation and the use of renewable power, especially solar power, the proportion of PV system is rapidly increasing and most of them are connected to distribution networks to supply power to the grid as well as local loads. There are many power quality issues to be considered with PV systems and one of the main issues is islanding.
null Bohan Liu, null Xiangping Ni, null Guozeng Yan, null Bo Li, null Ke Jia   +4 more
openaire   +1 more source

Impact of wideband noise on synchrophasor, frequency and ROCOF estimation

2015 IEEE International Workshop on Applied Measurements for Power Systems (AMPS), 2015
Next-generation Phasor Measurement Units (PMU) must exhibit superior performances in order to meet the accuracy requirements of active distribution grids. Till now most researchers have focused their efforts on mitigating the impact of intrinsic amplitude and phase fluctuations as well as harmonic and inter-harmonic disturbances, since they are usually
Macii, David, Fontanelli, Daniele, Petri, Dario, Barchi, Grazia   +3 more
openaire   +2 more sources

A DFT-based synchrophasor, frequency and ROCOF estimation algorithm

2013 IEEE International Workshop on Applied Measurements for Power Systems (AMPS), 2013
Fast and accurate synchrophasor measurements are of crucial importance for monitoring next-generation power distribution networks. While most of the Phasor Measurement Units (PMUs) used nowadays in transmission networks rely on static phasor models, more sophisticated models and stricter accuracy requirements are necessary to track amplitude, phase and
Petri, Dario, Fontanelli, Daniele, Macii, David, D. Belega   +3 more
openaire   +2 more sources

Advanced ROCOF protection of DFIG wind turbines

2013 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), 2013
The penetration of distributed generation (DG) in electrical power systems is rapidly increasing these days and more attention is drawn to maintaining a healthy distribution system. Islanding operation of DG is one of the biggest challenges. When Islanding occurs, the power supply from the main grid is interrupted which may cause a problem when ...
Bohan Liu, Guozeng Yan, Ke Jia
openaire   +1 more source

Fast Frequency Response Effect on RoCoF for Networks with Solar PV Integration

2021 IEEE PES Innovative Smart Grid Technologies - Asia (ISGT Asia), 2021
The fast frequency response (FFR) can be provided by converter-interfaced sources (CIS), and several system operators around the globe have recently been attempting to incorporate it into the frequency ancillary services. This paper introduces an approach for the maximum rate of change of frequency (RoCoF) calculation based on a moving time window to ...
Indira Alcaide-Godinez, Emad Fuad Areed, Rafael Castellanos   +2 more
openaire   +3 more sources

Assessing the Impact of Variable Generation on ROCOF Adequacy

2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA), 2018
Generating units are equipped with anti-islanding protections. Some of those protections schemes are based on detecting the excessive Rate of Change of Frequency that occurs when a generator becomes islanded and the power imbalance within the island is significant. A common concern within power system operations is the inertia reduction due to variable
Sebastian Serrano, Alex Moreno, Tomas Avila, Hector Chavez   +3 more
openaire   +1 more source

An impact study of ROCOF relays for islanding detection

10th International Conference on Advances in Power System Control, Operation & Management (APSCOM 2015), 2015
Due to the increasing penetration of distributed renewable generators in a distribution network, it is important to have the reliable and stable operation of an anti-islanding protection method to ensure the safety of personnel and equipment. This paper presents a detailed investigation on the performance of a Rate-Of-Change-Of-Frequency (ROCOF) method.
C.Y. Chan, S.K.K. Ng, T.K.Y. Lau
openaire   +1 more source

Bootstrap confidence regions for the expected ROCOF of a repairable system

IEEE Transactions on Reliability, 2000
Bootstrap methods are presented for constructing s-confidence regions for the s-expected ROCOF (rate of occurrence of failures) of a repairable system. This is based on the work of Cowling, et al. (1996) for the intensity function of a NHPP (nonhomogeneous Poisson process). The method is applied to the operating times of unscheduled maintenance actions
openaire   +1 more source

Uncertainty of ROCOF calculated by means of Monte Carlo method

2020 Conference on Precision Electromagnetic Measurements (CPEM), 2020
The measurement of Rate of Change of Frequency (ROCOF) was simulated to conduct a full test of an advanced ROCOF estimation algorithm. Whole measurement chain of a transducer and digitizer was simulated and an uncertainty of ROCOF estimation has been calculated using Monte Carlo Method.
openaire   +1 more source