Joint frequency and phasor estimation in unbalanced three-phase power systems

2014 ◽  
Author(s):  
Tirza Routtenberg ◽  
Lang Tong
Keyword(s):  
Power Systems ◽  
Three Phase ◽  
Joint Frequency ◽  
Phasor Estimation

Robust Adaptive Frequency Estimation of Three-Phase Power Systems

2010 ◽  
Vol 59 (7) ◽  
pp. 1793-1802 ◽  
Author(s):  
Mohsen Mojiri ◽  
Davood Yazdani ◽  
Alireza Bakhshai
Keyword(s):  
Power Systems ◽  
Frequency Estimation ◽  
Three Phase ◽  
Robust Adaptive

Achieving Multiple Functions of Three-Phase Electric Springs in Unbalanced Three-Phase Power Systems Using the Instantaneous Power Theory

2018 ◽  
Vol 33 (7) ◽  
pp. 5784-5795 ◽  
Author(s):  
Shuo Yan ◽  
Ming-Hao Wang ◽  
Tian-Bo Yang ◽  
Siew-Chong Tan ◽  
Balarko Chaudhuri ◽  
...  
Keyword(s):  
Power Systems ◽  
Power Theory ◽  
Multiple Functions ◽  
Instantaneous Power ◽  
Three Phase

scholarly journals A new approach to three-phase asynchronous motor model for electric power system analysis

2021 ◽  
Vol 12 (4) ◽  
pp. 2083
Author(s):  
Laura Collazo Solar ◽  
Angel A. Costa Montiel ◽  
Miriam Vilaragut Llanes ◽  
Vladimir Sousa Santos
Keyword(s):  
Power Systems ◽  
Reactive Power ◽  
Mechanical Load ◽  
Asynchronous Motor ◽  
Electrical Power ◽  
Variable Load ◽  
Electrical Power Systems ◽  
Active And Reactive Power ◽  
Voltage Variation ◽  
Three Phase

In this paper, a new steady-state model of a three-phase asynchronous motor is proposed to be used in the studies of electrical power systems. The model allows for obtaining the response of the demand for active and reactive power as a function of voltage and frequency. The contribution of the model is the integration of the characteristics of the mechanical load that can drive motors, either constant or variable load. The model was evaluated on a 2500 kW and 6000 V motor, for the two types of mechanical load, in a wide range of voltage and frequency, as well as four load factors. As a result of the evaluation, it was possible to verify that, for the nominal frequency and voltage variation, the type of load does not influence the behavior of the powers and that the reactive power is very sensitive to the voltage variation. In the nominal voltage and frequency deviation scenario, it was found that the type of load influences the behavior of the active and reactive power, especially in the variable load. The results demonstrate the importance of considering the model proposed in the simulation software of electrical power systems.

scholarly journals Harmonics and Neutral Line Current Compensation in Three-Phase Four-Wire Power Systems

2018 ◽  
Vol 11 (5) ◽  
pp. 550-559 ◽  
Author(s):  
Chernyshov Maxim O. ◽  
◽  
Dovgun Valery P. ◽  
Vazhenina Irina G. ◽  
Temerbaev Sergei A. ◽  
...  
Keyword(s):  
Power Systems ◽  
Neutral Line ◽  
Current Compensation ◽  
Line Current ◽  
Three Phase

scholarly journals Improved Performance of M-Class PMUs Based on a Magnitude Compensation Model for Wide Frequency Deviations

Mathematics ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 1361
Author(s):  
Jose Roberto Razo-Hernandez ◽  
Ismael Urbina-Salas ◽  
Guillermo Tapia-Tinoco ◽  
Juan Pablo Amezquita-Sanchez ◽  
Martin Valtierra-Rodriguez ◽  
...  
Keyword(s):  
Power Systems ◽  
Frequency Range ◽  
Magnitude Response ◽  
Modulation And Demodulation ◽  
Variable Function ◽  
Low Pass ◽  
Measurement Units ◽  
Phasor Estimation ◽  
Improved Performance ◽  
Reporting Rates

Phasor measurement units (PMUs) are important elements in power systems to monitor and know the real network condition. In order to regulate the performance of PMUs, the IEEE Std. C37.118.1 stablishes two classes—P and M, where the phasor estimation is carried out using a quadrature oscillator and a low-pass (LP) filter for modulation and demodulation, respectively. The LP filter plays the most important role since it determines the accuracy, response time and rejection capability of both harmonics and aliased signals. In this regard and by considering that the M-class filters are used for more accurate measurements, the IEEE Std. presents different M-class filters for different reporting rates (when a result is given). However, they can degrade their performance under frequency deviations if the LP frequency response is not properly considered. In this work, a unified model for magnitude compensation under frequency deviations for all the M-class filters is proposed, providing the necessary values of compensation to improve their performance. The model considers the magnitude response of the M-class filters for different reporting rates, a normalized frequency range based on frequency dilation and a fitted two-variable function. The effectiveness of the proposal is verified using both static and dynamic conditions for frequency deviations. Besides that, a real-time simulator to generate test signals is also used to validate the proposed methodology.

Adaptive frequency estimation of three-phase power systems

2015 ◽  
Vol 109 ◽  
pp. 290-300 ◽  
Author(s):  
Reza Arablouei ◽  
Kutluyıl Doğançay ◽  
Stefan Werner
Keyword(s):  
Power Systems ◽  
Frequency Estimation ◽  
Three Phase
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