Filters








20 Hits in 3.6 sec

Three-Point Synchrophasor Estimator with Better Off-Nominal Frequency Leakage Reduction

Roman Novak
2021 IEEE Access  
Novak : Three-Point Synchrophasor Estimator with Better Off-Nominal Frequency Leakage Reduction [9] Simple and well understood Steady-state conditions preferred Off-nominal frequency leakage (reduced  ...  Again, the off-nominal frequency of 51.5 Hz is selected to demonstrate the differences between the three estimators.  ... 
doi:10.1109/access.2021.3069043 fatcat:uzydp3bylbfs7kbktbqgdb34ue

Phasors Estimation at Offnominal Frequencies Through an Enhanced-SVA Method With a Fixed Sampling Clock

Christophe Ghafari, Hamada Almasalma, Bertrand Raison, Nouredine Hadjsaid, Raphael Caire, Eric Martin
2017 IEEE Transactions on Power Delivery  
This paper provides a solution to estimate synchrophasors with high accuracy at off-nominal frequencies using a nominal frequency clock.  ...  The test cases include: steady-state with off-nominal frequencies, harmonic distortions, amplitude and phase modulations, positive and negative ramps of frequency, and frequency jump.  ...  If the estimated frequency is off-nominal, then the sampled signal will be resampled at a rate which is synchronized with the off-nominal power system frequency.  ... 
doi:10.1109/tpwrd.2016.2597778 fatcat:e4uh3qqq5vctjbvo3fcudoywam

Dynamic Impedance Estimation: Challenges and Considerations

Mateus M. de de Oliveira, Renato R. Aleixo, Denise F. Resende, Leandro R. M. Silva, Rafael S. Salles, Carlos A. Duque, Paulo F. Ribeiro
2021 Applied Sciences  
The paper makes several considerations and highlights the challenges to obtain a precise estimation. Transducer equalization and harmonic synchrophasor estimation (HSpE) are reviewed and discussed.  ...  Dynamic impedance estimation will continue to be a great challenge for the power systems engineer as the system complexity increases with the massive insertion of power electronic inverters and the associated  ...  Each of the circles shows different off-nominal frequencies. Figure 7 . 7 TVE for the harmonic synchrophasor for a signal with noise and harmonics.  ... 
doi:10.3390/app11020558 fatcat:4x5znr6btna73fgqg3px24s5zi

High Accuracy Measurement Device For Railways Applications [article]

Signorino Davide, Luiso Mario, Delle Femine Antonio
2018 Zenodo  
Furthermore, the switching frequencies associated with IGBT train drives can resonate causing serious over-voltages, particularly in overhead line (catenary) systems.  ...  All the trains shall be equipped with an Energy Measurement Function (EMF), whose measurement accuracy has to be assessed and periodically reverified.  ...  Consider that a sinusoid off-nominal system frequency is observed at intervals {0, T0, 2T0, 3T0,..  ... 
doi:10.5281/zenodo.3332749 fatcat:nbfgd56vonhwvj54h3fmp5xere

Multifunction phasor analysis for distribution networks

Guglielmo Frigo, Giada Giorgi, Matteo Bertocco, Claudio Narduzzi
2016 2016 IEEE International Workshop on Applied Measurements for Power Systems (AMPS)  
To deal with the off-nominal issue, TFT has been further refined to include iterative estimation of the actual fundamental frequency [6] .  ...  Usually, T W is also assumed to span an integer number M of periods of the nominal power system frequency f 0 , which assures exact estimates for any multiple of frequency (f 0 /M ).  ... 
doi:10.1109/amps.2016.7602868 dblp:conf/amps/FrigoGBN16 fatcat:tj46tsnelzetff5nl7cqw4jjpi

Low-Cost Monitoring of Synchrophasors Using Frequency Modulation

Stephen Robson, Gan Tan, Abderrahmane Haddad
2019 Energies  
Based on Frequency Modulation (FM) of the measured fundamental frequency (and harmonics), followed by immediate re-injection of the modulated waveform back into the network, the proposed method can be  ...  Furthermore, the method does not require a separate communication media, but instead uses the power line itself to propagate the FM signals back to a central point.  ...  The HV feeder runs at a nominal voltage of 10kV and is modelled as a three phase wood pole overhead line (also shown in Appendix A).  ... 
doi:10.3390/en12040611 fatcat:ext4yjn4xbasnjzycmw2v33nyq

A Phasor Measurement Unit Algorithm Using IIR Filters for FPGA Implementation

Jan Kikkert
2019 Electronics  
Steady state errors for a rated voltage ± 10% and a rated frequency ± 5 Hz are < 0.000001% for total vector error (TVE) and < 1 µHz for frequency, with a latency of two mains cycles.  ...  The IIR-based PMU easily satisfies all the requirements of IEC/IEEE standard and has a much better out of band signal rejection performance than a FIR-based PMU.  ...  IIR filters are normally realised using the bilinear Z transform, together with cut-off frequency pre-distortion.  ... 
doi:10.3390/electronics8121523 fatcat:tgmjfon4obegtf6gjsavdv6j7a

Filter Design Masks for C37.118.1a-Compliant Frequency-Tracking and Fixed-Filter M-Class Phasor Measurement Units

Andrew J. Roscoe, Bill Dickerson, Kenneth E. Martin
2015 IEEE Transactions on Instrumentation and Measurement  
In particular, there is a delicate trade-off between passband flatness (the bandwidth test) and stopband rejection in the Out-Of-Band (OOB) test.  ...  The M-class PMU with reporting rate 25Hz is the most difficult to design, for reasons given in this paper.  ...  , then the deviation of the filter gain from unity is minimised, even during off-nominal frequency.  ... 
doi:10.1109/tim.2015.2445111 fatcat:2nilac5oc5dargsugocffgmfnm

Synchrophasor for enhancing operational reliability of Nigerian electric power grid

Emmanuel Oleka, Samuel Ndubisi, Gary L. Lebby
2017 SoutheastCon 2017  
This has increased the burdens on the existing transmission assets and in some cases, has caused the loading of the transmission assets beyond their design limits with consequent reduction in power quality  ...  This paper looks into these techniques with the view to exploring their applicability to the Nigerian 330KV electric power grid, towards seeking ways to enhancing the performance of the grid for better  ...  The conductors of the line were replaced with the same conductor size but three conductors bundle.  ... 
doi:10.1109/secon.2017.7925399 fatcat:cl3hgl4zcng77jsqvsxm65w4tq

Dynamic Security of Interconnected Electric Power Systems - Volume 1

Mohamed EL-Shimy
2018 Figshare  
A Phasor Measurement U synchronized phasor, frequency, and rate of change of frequency estimates from As shown in Fig. 1 .5, the needed high speed synchronization sampling is achieved by a phase-lock  ...  Sudden or large reductions in the energy production in power systems can be attributed to three main causes.  ...  These drawbacks are mainly associated, for example, with:  ... 
doi:10.6084/m9.figshare.6169508.v1 fatcat:iztm2jwl5racvexdypaswm7xk4

Control and Communication Techniques for the Smart Grid: An Energy Efficiency Perspective

Yee Wei Law, Hemanshu R. Pota, Jiong Jin, Zhihong Man, Marimuthu Palaniswami
2014 IFAC Proceedings Volumes  
In their model, a charger is turned either off or on at full charging rate.  ...  Point-to-point, point-to-multipoint Point-to-point Point-to-point, point-to-multipoint Point-to-multipoint Supporting case Choi et al. (2008) Smallwood and Wennermark (2010) Unknown Unknown  ... 
doi:10.3182/20140824-6-za-1003.01736 fatcat:26u7xwtucfc37psv3jve6un5ry

The Development of IoT Within Energy Infrastructure [chapter]

Steffi O. Muhanji, Alison E. Flint, Amro M. Farid
2019 eIoT  
This information is used to make decisions either independently in a decentralized fashion or in coordination with the informatic components of other devices.  ...  (4) the machine must deactivate the artificial megawatt output once the frequency has returned to the nominal frequency [266] .  ...  In addition to point-to-point capabilities, it can create meshed networks with a range of 1-100 m at data rates of up to 3 Mbps [412, 427].  ... 
doi:10.1007/978-3-030-10427-6_3 fatcat:bivdubpfq5dang2cqgbowqyxoy

A Survey of Machine Learning Methods for Detecting False Data Injection Attacks in Power Systems [article]

Ali Sayghe, Yaodan Hu, Ioannis Zografopoulos, XiaoRui Liu, Raj Gautam Dutta, Yier Jin, Charalambos Konstantinou
2020 arXiv   pre-print
Adversaries can successfully perform FDIAs in order to manipulate the power system State Estimation (SE) by compromising sensors or modifying system data.  ...  SE is an essential process performed by the Energy Management System (EMS) towards estimating unknown state variables based on system redundant measurements and network topology.  ...  The results proved that the machine learning algorithms perform better than any other algorithm (e.g., state vector estimation approach) in detecting FDIAs.  ... 
arXiv:2008.06926v1 fatcat:grxa2q5vords3ew2a6kuzrw3im

Survey of machine learning methods for detecting false data injection attacks in power systems

Ali Sayghe, Yaodan Hu, Ioannis Zografopoulos, XiaoRui Liu, Raj Gautam Dutta, Yier Jin, Charalambos Konstantinou
2020 IET Smart Grid  
Adversaries can successfully perform FDIAs to manipulate the power system state estimation (SE) by compromising sensors or modifying system data.  ...  SE is an essential process performed by the energy management system towards estimating unknown state variables based on system redundant measurements and network topology.  ...  The results proved that the machine learning algorithms perform better than any other algorithm (e.g. state vector estimation approach) in detecting FDIAs.  ... 
doi:10.1049/iet-stg.2020.0015 fatcat:kzfjgzhmybgntijdpszkhk4p7i

Toxicity Analysis and Cry Gene Profiling of Bacillus Thuringiensis Isolated from Western Ghats of Tamil Nadu State, India

A. Ramalakshmi, P. Annakodi, V. Udayasurian, V. Balasubramani
2018 Proceedings of the Indian National Science Academy  
The most satisfactory way, in my opinion, is that of reducing the concept of finite procedure to that of a machine with a finite number of parts, as has been done by the British mathematician Turing".  ...  The data collected was in the IEEE synchrophasor format C37.118 2005 [Min and Shengsong, 2005 ] that consists of frequency and three phases of voltages and currents.  ...  The trajectories of the resulting three time scale redesigned system approach those of the nominal system when the filter gains are increased.  ... 
doi:10.16943/ptinsa/2018/49413 fatcat:2w6rohpbava5zh6m26tsiz7qky
« Previous Showing results 1 — 15 out of 20 results