scholarly journals The problem of active power measurement in the case of distorted waveforms

2019 ◽  
Vol 24 (6) ◽  
pp. 139-143
Author(s):  
Agata Bandrowska-Kaim ◽  
Krzysztof Kratiuk
Keyword(s):  
Power System ◽  
Active Power ◽  
Power Measurement ◽  
The Real ◽  
Fundamental Component ◽  
Harmonic Content ◽  
Energy Measure ◽  
Higher Harmonic

The article discusses the influence of deformed waveforms on the accuracy of power measurement in the energy meters installed by the distributors of the power system. The basic sub-logical and reliability aspects of the real energy measure are presented. The discussed issue is presented based on the analysis of two cases: deformed waveforms with a fundamental component and higher harmonic content and distorted waveforms with subharmonic and interharmonic contents.

Active power measurement algorithm for power system signals under non-sinusoidal conditions and wide-range frequency deviations

2009 ◽  
Vol 3 (1) ◽  
pp. 57-65 ◽  
Author(s):  
M.D. Kušljević ◽  
J.J. Tomić ◽  
D.P. Marčetić
Keyword(s):  
Power System ◽  
Active Power ◽  
Power Measurement ◽  
Wide Range ◽  
Measurement Algorithm

scholarly journals The Implementation of a Digital Filter-Based Algorithm for Active Power Measurement using an ARM Microcontroller

2017 ◽  
Vol 1 (3) ◽  
Author(s):  
Ajakida Eski ◽  
Orion Zavalani ◽  
Denald Komici
Keyword(s):  
Digital Filter ◽  
Low Cost ◽  
Measurement Techniques ◽  
Electricity Consumption ◽  
Power Converter ◽  
Active Power ◽  
Power Measurement ◽  
Real Power ◽  
The Real ◽  
Standard Values

Since in Albania are still present the electromechanical meters, an urgent need to control the electricity consumption with an efficient and reliable system requires the use of the most modern measurement techniques and the realization of energy measurement devices with more efficiency and precision. This paper provides a software implementation of the real power measurement using an ARM Cortex MO, PSoC4 microcontroller which is responsible for executing algorithms required for the calculation and ensures high performances and low cost. A software based Average Active Power Converter is presented to calculate the real power from the voltage and current signals. This paper briefly covers the mathematics of active power and offers a measurement algorithm based in IIR digital filter, which is more versatile when compared to the analogue filters in their characteristics such as programming flexibility, ability to handle both low as well as high frequency signals accurately. To check the performance of the proposed measurement system, the calculated active power from the standard values of voltage and current is compared to the measured active power from our system and is concluded that the meter has been successfully completed.

scholarly journals Algorithm for optimization of power system short-term mode in conditions of partial uncertainty of initial information taking into account the frequency change

2020 ◽  
Vol 216 ◽  
pp. 01100
Author(s):  
Tulkin Gayibov
Keyword(s):  
Power Systems ◽  
Power System ◽  
Economic Effect ◽  
Active Power ◽  
Computational Experiments ◽  
Frequency Change ◽  
Short Term ◽  
Initial Information ◽  
The Real ◽  
System Mode

Many existing methods and algorithms for optimization of short-term modes of power systems provide in calculations the introduction of a slack bus station, which ensures the balance of active power and, accordingly, the permissible frequency. In cases where the real load deviates from the planned one, determined by forecasting, the power system mode may turn out to be not optimal, and sometimes even not acceptable. This factor is especially noticeable in conditions of partial uncertainty of initial information about loads of nodes. To overcome this problem, planning of power system mode should be carried out taking into account the frequency change and, accordingly, the regulatory capabilities of all stations. This paper proposes an algorithm for optimization of modes of power systems in terms of partial uncertainty of initial information about loads, taking into account the frequency change. On the basis of computational experiments using the proposed algorithm, it is shown that taking into account the frequency change when planning modes of power systems with partially undefined loads of nodes can give a significant economic effect.

scholarly journals Real Fault Location in a Distribution Network Using Smart Feeder Meter Data

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3242
Author(s):  
Hamid Mirshekali ◽  
Rahman Dashti ◽  
Karsten Handrup ◽  
Hamid Reza Shaker
Keyword(s):  
Fault Location ◽  
Network Reliability ◽  
Distribution Network ◽  
Estimation Method ◽  
Electrical Energy ◽  
Distribution Networks ◽  
Active Power ◽  
Financial Loss ◽  
Smart Meters ◽  
The Real

Distribution networks transmit electrical energy from an upstream network to customers. Undesirable circumstances such as faults in the distribution networks can cause hazardous conditions, equipment failure, and power outages. Therefore, to avoid financial loss, to maintain customer satisfaction, and network reliability, it is vital to restore the network as fast as possible. In this paper, a new fault location (FL) algorithm that uses the recorded data of smart meters (SMs) and smart feeder meters (SFMs) to locate the actual point of fault, is introduced. The method does not require high-resolution measurements, which is among the main advantages of the method. An impedance-based technique is utilized to detect all possible FL candidates in the distribution network. After the fault occurrence, the protection relay sends a signal to all SFMs, to collect the recorded active power of all connected lines after the fault. The higher value of active power represents the real faulty section due to the high-fault current. The effectiveness of the proposed method was investigated on an IEEE 11-node test feeder in MATLAB SIMULINK 2020b, under several situations, such as different fault resistances, distances, inception angles, and types. In some cases, the algorithm found two or three candidates for FL. In these cases, the section estimation helped to identify the real fault among all candidates. Section estimation method performs well for all simulated cases. The results showed that the proposed method was accurate and was able to precisely detect the real faulty section. To experimentally evaluate the proposed method’s powerfulness, a laboratory test and its simulation were carried out. The algorithm was precisely able to distinguish the real faulty section among all candidates in the experiment. The results revealed the robustness and effectiveness of the proposed method.

Review of Control Methods for Active Power Filters

2013 ◽  
Vol 811 ◽  
pp. 657-660 ◽  
Author(s):  
You Jie Ma ◽  
Hong De Yuan ◽  
Xue Song Zhou
Keyword(s):  
Power System ◽  
Control Strategies ◽  
Active Power Filter ◽  
Active Power ◽  
Power Electronic ◽  
Active Power Filters ◽  
Power Filter ◽  
Power Filters ◽  
Reactive Current ◽  
Contrast Analysis

With the wide application of power electronic equipments in power system, more and more harmonic are poured into the power system, which cause power pollution and make the power quality problem increasingly serious. Active power filter (APF) is an important equipment to compensate harmonic and reactive current in power system. One of the key technologies lies in the real-time and accurate control. The fundamental principles of several control strategies of compensate current were presented, and the respective merit and demerit of these control strategies were pointed out with contrast analysis in this paper. Active power filter will achieve a higher performance and a wider application with the continuous development of the control strategy.

Apparent Power Ratio of the Shunt Active Power Filter Under Balanced Power System Voltages

2010 ◽  
Vol 3 (6) ◽  
pp. 363-382 ◽  
Author(s):  
A. Kouzou ◽  
M.O. Mahmoudi ◽  
M.S. Boucherit
Keyword(s):  
Power System ◽  
Active Power Filter ◽  
Active Power ◽  
Power Ratio ◽  
Shunt Active Power Filter ◽  
Power Filter
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