scholarly journals Inefficiencies in Unbalanced Three-Phase Power Systems. Relationship Between System Asymmetry and Instantaneous Power Waves

2004 ◽  
Vol 1 (02) ◽  
pp. 112-117
Author(s):  
R. Sabater ◽  
◽  
V. Donderis
Keyword(s):  
Power Systems ◽  
Instantaneous Power ◽  
Three Phase

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 Three-phase Quaternion Power in Three-wire Systems

2021 ◽  
Vol 19 ◽  
pp. 493-498
Author(s):  
André S. F. Komeno ◽  
◽  
Anésio L. F. Filho ◽  
Joao Y. Ishihara ◽  
Victor P. Brasil
Keyword(s):  
Power Systems ◽  
Systems Analysis ◽  
Quaternion Algebra ◽  
Average Power ◽  
Time Varying ◽  
Instantaneous Power ◽  
Three Phase ◽  
Complex Power ◽  
Unbalanced Load ◽  
Unbalanced Loads

Instantaneous power theory has a central role in power systems analysis. Among mathematical settings used for the development of this theory, quaternion algebra has been used for describing electrical variables in recent works. In this context, this paper aims to describe three-phase power in a quaternion framework. We analyze quaternion power for balanced and unbalanced delta loads, comparing the expressions obtained to the usual expressions of complex power. The quaternion power expression obtained also makes it natural to introduce a decomposition of the unbalanced load in terms of a balanced component and an unbalanced load with null average power. It is also shown that delta unbalanced loads are equivalent to time-varying balanced loads. The results obtained extend the power systems theory in the quaternion domain and emphasize the advantages of using this framework.

scholarly journals Instantaneous Power Theory For Unbalanced Voltage Compensation Of 3-Phase Power Systems

2021 ◽  
Vol 12 (2) ◽  
pp. 1319-1325
Author(s):  
Gaddam Siva, Et. al.
Keyword(s):  
Power Systems ◽  
Control Technique ◽  
Phase System ◽  
Control Procedure ◽  
Dynamic Power ◽  
Control Approach ◽  
Instantaneous Power ◽  
Three Phase ◽  
Unbalanced Voltage ◽  
Power Channel

This paper presents another control technique for a three-phase power systems which depends on instantaneous power hypothesis for unbalanced voltage. In this paper we will dissect power quality issues under distortional and unbalanced voltage conditions, In this methodology, the voltage and source voltages are utilized to create the reference voltages of an arrangement dynamic power channel and source currents are utilized to produce the reference currents of a shunt dynamic power channel. The proposed control approach depends on instantaneous power and is streamlined by utilizing a self-tuning channel, without utilizing any filters or phase bolted circle, and without estimating voltage or channel currents. The presentation of the proposed control approach is assessed regarding power factor adjustment, source impartial current alleviation, voltage adjusting and relief of the current and voltage harmonics of distortional and unbalanced voltages in a three-phase system. Accordingly, the occasions that current is estimated is diminished and system execution is improved. The outcomes got by MATLAB/SIMULINK programming show the viability of the proposed control procedure in contrast with the regular technique.

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

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 Instantaneous Power Control Strategy for Voltage Improvement in Power Network Equipped by Wind Generator

2021 ◽  
Vol 54 (1) ◽  
pp. 147-154
Author(s):  
Issam Griche ◽  
Sabir Messalti ◽  
Kamel Saoudi
Keyword(s):  
Power Systems ◽  
Power Control ◽  
Wind Power ◽  
Control Strategy ◽  
Large Scale ◽  
Transient Stability ◽  
Short Circuit ◽  
Dynamical Response ◽  
Instantaneous Power ◽  
Wide Range

The uncertainty of wind power brings great challenges to large-scale wind power integration. The conventional integration of wind power is difficult to adapt the demand of power grid planning and operation. This paper proposes an instantaneous power control strategy for voltage improvement in power networks using wind turbine improving the dynamical response of power systems performances (voltage and transient stability) after fault. In which the proposed control algorithm based on a new advanced control strategy to control the injected wind power into power system. The efficiency of developed control strategy has been tested using IEEE 9 Bus. Simulation results have showed that the proposed method perform better to preserve optimal performances over wide range of disturbances for both considered scenarios studied short circuit and variable loads.

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