scholarly journals ACTIVE, REACTIVE POWER AS COMPONENTS OF THE INSTANTANEOUS POWER A CIRCUIT WITH PERIODIC CURRENT AND VOLTAGE

2018 ◽  
Vol 2018 (51) ◽  
pp. 33-40
Author(s):  
О.V. Bialobrzheskyi ◽  
Keyword(s):  
Reactive Power ◽  
Instantaneous Power ◽  
Periodic Current

scholarly journals Interpretasi Praktis Terhadap Istilah-Istilah Daya pada Rangkaian Listrik Satu Fase Sinusoidal

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Adlan Bagus Pradana ◽  
Unan Yusmaniar Oktiawati ◽  
Jimmy Trio Putra ◽  
Dhanis Woro Fittrin Selo Nur Giyatno ◽  
Atikah Surriani
Keyword(s):  
Computer Simulations ◽  
Daily Activity ◽  
Power Analysis ◽  
Single Phase ◽  
Reactive Power ◽  
Electrical Engineering ◽  
Active Power ◽  
General Application ◽  
Instantaneous Power ◽  
Complex Power

In electrical engineering, there are several power terms; active power, reactive power, instantaneous active power, instantaneous active power, instantaneous power, apparent power and complex power. Even though are used in daily activity, electrical practitioners are facing difficulty to explain those terms practically. This paper tries to solve those difficulty by interpret those term in practical way. Firstly, each power term are defined theoretically. Then those terms are presented mathematically. Next, power in single phase sinusoidal electric network is analyzed. Theoretical definition result is connected with power analysis result. Computer simulations are held to strengthen interpretation result. Considering the width of discussion area, this paper only covers most general application, that is single phase sinusoidal network.

scholarly journals SIL Modeling of Shunt Harmonics Active Filter

2020 ◽  
Author(s):  
Shweta Dhiman ◽  
A. Gupta ◽  
J. Chandle
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Active Filter ◽  
Control Logic ◽  
Flexible Control ◽  
Instantaneous Power ◽  
Electrical Stress ◽  
Time Simulation ◽  
System Analyst ◽  
Industrial Standards

The evolution in semiconducting devices has introduced flexible control on a system but it has also penetrated harmonics in the grid, which results in extra electrical stress and load. Limiting the presence of harmonics in the grid and low power factor maintained by consumers has become of utmost priority to the power system analyst. Hence, the need for Active Filter emerges. Here, a real-time simulation, in dSPACE- Targetlink, of shunt harmonics active filter is propounded. The possible basic control strategy used in the simulation is ”Instantaneous Power Theory”. Control logic of two features of Active Filter viz., Global Harmonics Elimination, and Reactive Power Compensation are produced in the paper. The results obtained in ”Software In Loop Mode” of dSPACE are discussed and verified in detail. The richness of the code generated by the dSPACE- Target link can be reasoned by observing the results which are well aligned with the industrial standards regarding the harmonics.

scholarly journals Inactive power detection in AC network

2021 ◽  
Vol 11 (2) ◽  
pp. 966
Author(s):  
Nickolay I. Schurov ◽  
Sergey V. Myatezh ◽  
Alexandr V. Myatezh ◽  
Boris V. Malozyomov ◽  
Alexandr A. Shtang
Keyword(s):  
Reactive Power ◽  
Power Level ◽  
Phase Shifts ◽  
Active Power ◽  
Power Balance ◽  
Stationary Mode ◽  
Instantaneous Power ◽  
Methodological Errors ◽  
The Future ◽  
Ac Networks

Using the examples of wave and vector diagrams, we study the conditions for the appearance of components of inactive power in an AC network, which are known as reactive power and distortion power. It is shown that the components of the active, reactive power and distortion power are mutually orthogonal and form a power balance, which can be violated mainly due to methodological errors in calculating these components under conditions of non-stationary mode parameters. It is established that the interaction of reactive power and distortion power occurs at the instantaneous power level, and changing their phase shifts allows you to adjust the shape of the resulting power without involving additional active power in the AC network. The results obtained will allow not only to correctly determine the proportion and nature of the components of inactive capacities, which is valuable for solving the problems of optimizing modes in AC networks, but also to create effective technical means of compensating for the identified inactive capacities in the future.

Study on 3-Phase PWM Rectifier Controlled by Direct Power

2013 ◽  
Vol 325-326 ◽  
pp. 494-498
Author(s):  
Xuan Gong ◽  
Di Chen Liu ◽  
Fei Fei Dong ◽  
Bo Wang
Keyword(s):  
Reactive Power ◽  
Pwm Rectifier ◽  
Direct Power ◽  
Basic Space ◽  
Instantaneous Power ◽  
New Strategy ◽  
Input Side ◽  
Simulation And Experiment ◽  
Space Vectors ◽  
Switching State

Based on the analysis on shortcomings of controlling strategies of direct power on the traditional 3-phase Boost-type PWM Rectifier through space vectors, a new controlling strategy is proposed in this paper. With this new strategy, the space vector is divided into 12 basic space vectors to form a new switching table. The instantaneous power controlling technology is realized through the control of instantaneous active power and reactive power by choosing the best switching state of PWM Rectifier. This new controlling strategy can put the input side unit power into operation, improve the efficiency of power and reduce harmonics of the input current. The effectiveness and feasibility of this controlling strategy have been justified through the simulation and experiment.

Sliding Mode Variable Structure Direct Instantaneous Power Control of Grid-Connected Converter with an LCL Filter

2014 ◽  
Vol 1070-1072 ◽  
pp. 1234-1240
Author(s):  
Zhi Qun Luo ◽  
Yan Qing Wang ◽  
Jian Ru Wan ◽  
Shao Lun Huang
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Sliding Mode ◽  
Variable Structure ◽  
Lcl Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Instantaneous Power ◽  
Sliding Mode Variable Structure ◽  
Virtual Flux

Aim at solving the complex computation and complicated circuit of grid-connected converter, the sliding mode variable structure theory is introduced into its direct instantaneous power control. By analysis and modeling of three-phase grid-connected converter with an LCL-filter, sliding mode variable structure control is constructed with the active power and reactive power. The chattering is weakened by using the exponential reaching law. Cost of LCL grid-connected converter system is reduced at the same time when unit power factor and low harmonic distortion are realized. In order to increase the stability of the system, the virtual flux variable is integrated with the sliding-mode variable structure direct power control algorithm, and the improved first-order low pass filter virtual flux is used to remove the voltage sensor. By simulation, the effectiveness and feasibility of the control method is proved.

Research on the Control of AFE Converter

2014 ◽  
Vol 654 ◽  
pp. 233-237
Author(s):  
Jian Tang ◽  
Yue Nan Zeng ◽  
Lei Zheng ◽  
Jin Hui Liu
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Switching Frequency ◽  
Control Loop ◽  
Direct Power ◽  
Direct Power Control ◽  
Two Phase ◽  
Instantaneous Power ◽  
Sinusoidal Current ◽  
Grid Side

In this paper, a strategy of AFE converter based on direct power control is presented. The AFE converter possesses the merit of sinusoidal current on grid-side, controllable power factor and constant DC voltage, meanwhile, power feedback to the grid can be realized. Firstly, a power control mathematical model of AFE converter in two-phase synchronous rotating coordinate is built, on this basis, adopts the square of voltage control in the outer control loop and limits the slope of the setting voltage to improve the starting performance; then uses power feedforward decoupling control in inner control loop , combines with the instantaneous power theory and uses space vector control algorithm to replace the switch table to solve the problem that switching frequency is not fixed in traditional direct power control. Ultimately realizes the independent control of active and reactive power without decoupling. The experimental results verify the correctness and validity of the proposed control strategy.

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