scholarly journals Effect of Proximity, Burden, and Position on the Power Quality Accuracy Performance of Rogowski Coils

Sensors ◽  
2022 ◽  
Vol 22 (1) ◽  
pp. 397
Author(s):  
Alessandro Mingotti ◽  
Federica Costa ◽  
Lorenzo Peretto ◽  
Roberto Tinarelli
Keyword(s):  
Power Quality ◽  
Renewable Energy Sources ◽  
Current Transformer ◽  
Rogowski Coil ◽  
Performance Ratio ◽  
Simple Task ◽  
Ratio Error ◽  
Rogowski Coils ◽  
Accuracy Performance ◽  
The Ideal

Power quality evaluation is the process of assessing the actual power network parameters with respect to the ideal conditions. However, several new assets and devices among the grid include mining the voltage and current quality. For example, the power converters needed for renewable energy sources’ connection to the grid, electric vehicles, etc., are some of the main sources of disturbances that inject high-frequency components into the grid. Consequently, instrument transformers (ITs) should be capable of measuring distorted currents and voltages with the same level of accuracy guaranteed for the ideal frequency (50–60 Hz). This is not a simple task if one considers that several other influence quantities endlessly act on the ITs. To this purpose, considering the lack of a standard, this work presents a measurement setup and specific tests for testing a commonly used type of low-power current transformer, the Rogowski coil (RC). In particular, the accuracy performance (ratio error and phase displacement) of the RCs was evaluated when measuring distorted signals while other influence quantities affected the RCs. Such quantities included positioning, burden, and magnetic field. The results indicate which quantities (or combination of them) have the greatest effect on the RC’s accuracy performance.

Design and Analysis of PCB Rogowski Coil Current Transformer

2014 ◽  
Vol 672-674 ◽  
pp. 984-988
Author(s):  
Biao Su ◽  
Li Xue Li ◽  
Yi Hui Zheng ◽  
Xin Wang ◽  
Yan Liu ◽  
...  
Keyword(s):  
Power System ◽  
High Sensitivity ◽  
Current Transformer ◽  
Rogowski Coil ◽  
Electromagnetic Current ◽  
Current Transformers ◽  
Coil Current ◽  
Electronic Current ◽  
Rogowski Coils ◽  
Electronic Current Transformers

Electronic current transformers are more suitable for the development of power system compared with traditional electromagnetic current transformers. Rogowski coil current transformer is one of three electric current transformers. According to the measurement principle of Rogowski coils, the equivalent circuit of PCB Rogowski coils is analyzed. By using four PCB Rogowski coils combined, a PCB Rogowski coil current transformer is designed and tested. The results show that the designed PCB Rogowski coil transformer has good linearity and high sensitivity and measurement accuracy and it can meet the requirement of power system.

scholarly journals Smart Characterization of Rogowski Coils by Using a Synthetized Signal

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3359 ◽  
Author(s):  
Alessandro Mingotti ◽  
Lorenzo Peretto ◽  
Roberto Tinarelli
Keyword(s):  
Low Power ◽  
Distribution System ◽  
Network Models ◽  
Experimental Tests ◽  
Current Transformer ◽  
Rogowski Coil ◽  
Sufficient Information ◽  
Instrument Transformers ◽  
Rogowski Coils ◽  
Characterization Procedure

With the spread of new Low-Power Instrument Transformers (LPITs), it is fundamental to provide models and characterization procedures to estimate and even predict the LPITs’ behavior. In fact, distribution system operators and designers of network models are looking for all forms of information which may help the management and the control of power networks. For this purpose, the paper wants to contribute to the scientific community presenting a smart characterization procedure which easily provides sufficient information to predict the output signal of a Low-Power Current Transformer (LPCT), the Rogowski coil. The presented procedure is based on a synthetized signal applied to the Rogowski coil. Afterwards, the validity of the procedure is assessed within the Matlab environment and then by applying it on three off-the-shelf Rogowski coils. Simulations and experimental tests and results involving a variety of distorted signals in the power quality frequency range and by adopting a quite simple measurement setup demonstrated the effectiveness and the capability of the procedure to correctly estimate the output of the tested device.

Research on PCB Rogowski Current Transformer Based on AD7742

2014 ◽  
Vol 981 ◽  
pp. 589-593
Author(s):  
Xin Lao Wei ◽  
Bo Zhu ◽  
Bing Pang ◽  
Tong Liu ◽  
Song Wang ◽  
...  
Keyword(s):  
Current Transformer ◽  
High Accuracy ◽  
Rogowski Coil ◽  
Magnetic Saturation ◽  
Iron Core ◽  
Measuring Range ◽  
Digital Integrator ◽  
Saturation Phenomenon ◽  
Good Linearity ◽  
Rogowski Coils

Rogowski coils is a kind of special structure hollow coils, it has good linearity, no iron core, no magnetic saturation phenomenon and wide measuring range, which has been used to measure all kinds of various changes current. The current transformer consist of PCB Rogowski coil and digital integrator has been designed, includes the structure of PCB Rogowski coils and the principle digital integrator based on AD7742. The test of PCB current transformer show that it has high accuracy and PCB coils has good linearity. It can meet the requirement of current measurement.

scholarly journals Optimal Controllers for Grid Connected Re System and their Challenges: A Brief Review

2021 ◽  
Vol 11 (4) ◽  
pp. 1719-1728
Author(s):  
P. Lakshminarayana ◽  
K. Mercy Rosalina ◽  
M. Umamaheswara Rao ◽  
K. Bala Krishna
Keyword(s):  
Renewable Energy ◽  
Power System ◽  
Power Quality ◽  
Reactive Power ◽  
Control Strategies ◽  
Renewable Energy Sources ◽  
Renewable Resource ◽  
Control Technique ◽  
Energy Sources ◽  
The Ideal

A conquest for Science and also Technology and also the ever-growing planet of innovation trigger numerous innovations. Currently India demandingly picking to beat non-renewable fuel sources sparsity issues along with Renewable Energy Sources (RES). Renewable Energy Sources needs intricate innovations for the usage. Renewable resource resources and also modern technologies possess prospective to supply options to the enduring electricity troubles being actually experienced due to the establishing nations. The renewable resource resources like wind power, solar power, geothermal power, electricity, biomass electricity and also energy tissue innovation may be made use of to get over electricity lack in India. To overcome the power demand for such a fast-growing economic climate, India will certainly need an ensured source of 3- 4 times extra power than the overall power consumed today. This work reviews different control techniques and proposes a new control technique Optimal Recurrent Neural Networks (ORNN) based Controller to mitigate the power quality (PQ) disturbances of power system. In the proposed approach, optimal weight selection is employed for enhancing the learning procedure of RNN (ORNN). Here, ORNN technique is utilized for selecting the ideal control signal of grid inverter through optimal adjustments of the control variables in the power system. The proposed strategy creates the ideal control of the grid inverter which tries to enhance the power quality of a power system and manage the line voltage by providing reactive power compensation. This paper reviews several papers with different control strategies applied to the grid connected inverter.

scholarly journals Rooftop Solar PV Penetration Impacts on Distribution Network and Further Growth Factors—A Comprehensive Review

Electronics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 55
Author(s):  
Busra Uzum ◽  
Ahmet Onen ◽  
Hany M. Hasanien ◽  
S. M. Muyeen
Keyword(s):  
Solar Energy ◽  
Power Quality ◽  
Distribution System ◽  
Renewable Energy Sources ◽  
Distribution Network ◽  
System Stability ◽  
Solar Pv ◽  
Voltage Quality ◽  
Solution Methods ◽  
Pv Penetration

In order to meet the electricity needs of domestic or commercial buildings, solar energy is more attractive than other renewable energy sources in terms of its simplicity of installation, less dependence on the field and its economy. It is possible to extract solar energy from photovoltaic (PV) including rooftop, ground-mounted, and building integrated PV systems. Interest in rooftop PV system applications has increased in recent years due to simple installation and not occupying an external area. However, the negative effects of increased PV penetration on the distribution system are troublesome. The power loss, reverse power flow (RPF), voltage fluctuations, voltage unbalance, are causing voltage quality problems in the power network. On the other hand, variations in system frequency, power factor, and harmonics are affecting the power quality. The excessive PV penetration also the root cause of voltage stability and has an adverse effect on protection system. The aim of this article is to extensively examines the impacts of rooftop PV on distribution network and evaluate possible solution methods in terms of the voltage quality, power quality, system protection and system stability. Moreover, it is to present a comparison of the advantages/disadvantages of the solution methods discussed, and an examination of the solution methods in which artificial intelligence, deep learning and machine learning based optimization and techniques are discussed with common methods.

scholarly journals Optimal Harmonic Mitigation in Distribution Systems with Inverter Based Distributed Generation

2021 ◽  
Vol 11 (2) ◽  
pp. 774 ◽  
Author(s):  
Ahmed S. Abbas ◽  
Ragab A. El-Sehiemy ◽  
Adel Abou El-Ela ◽  
Eman Salah Ali ◽  
Karar Mahmoud ◽  
...  
Keyword(s):  
Power Quality ◽  
Distributed Generation ◽  
Distribution System ◽  
Distribution Systems ◽  
Renewable Energy Sources ◽  
Harmonic Distortion ◽  
Planning Problem ◽  
Voltage Profile ◽  
Harmonic Mitigation ◽  
The Impact

In recent years, with the widespread use of non-linear loads power electronic devices associated with the penetration of various renewable energy sources, the distribution system is highly affected by harmonic distortion caused by these sources. Moreover, the inverter-based distributed generation units (DGs) (e.g., photovoltaic (PV) and wind turbine) that are integrated into the distribution systems, are considered as significant harmonic sources of severe harmful effects on the system power quality. To solve these issues, this paper proposes a harmonic mitigation method for improving the power quality problems in distribution systems. Specifically, the proposed optimal planning of the single tuned harmonic filters (STFs) in the presence of inverter-based DGs is developed by the recent Water Cycle Algorithm (WCA). The objectives of this planning problem aim to minimize the total harmonic distortion (THD), power loss, filter investment cost, and improvement of voltage profile considering different constraints to meet the IEEE 519 standard. Further, the impact of the inverter-based DGs on the system harmonics is studied. Two cases are considered to find the effect of the DGs harmonic spectrum on the system distortion and filter planning. The proposed method is tested on the IEEE 69-bus distribution system. The effectiveness of the proposed planning model is demonstrated where significant reductions in the harmonic distortion are accomplished.

scholarly journals Evaluation of Functioning Quality of Local Electrical Systems by the Criterion Method Based on Markov Processes

2019 ◽  
pp. 169-172 ◽  
Author(s):  
Petro Lezhniuk ◽  
Vyacheslav Komar ◽  
Natalya Sobchuk ◽  
Olena Sikorska
Keyword(s):  
Markov Processes ◽  
Renewable Energy Sources ◽  
Network Development ◽  
Least Action ◽  
Electrical Systems ◽  
Principle Of Least Action ◽  
Intensive Development ◽  
Criterion Method ◽  
The Ideal

The article proposes to use of a combination of the criterion method and Markov processes to evaluate the quality of functioning of renewable energy sources (RES) in the form of integrated readiness characteristic of the electricity network with RES or a local electrical system (LES). This is possible throughthe analysis of the problems of ensuring the quality of electricity supply in the conditions of intensive development of RES and defined by the qualimetric characteristics of the electricity networks, which are important for the provision of quality electricity. This contribute the development of generalizedsolutions and network development strategies, especially when it comes to building RES. The components of the integral index are determined as the probability of matching the actual regime to the "ideal". The "ideal" mode is determined on the basis of the principle of least action and corresponds to the circuit diagram of the network formed by the r-scheme. The basis thus determined in this way reduces the subjectivity of both evaluations and decisions taken on the basis of it.

scholarly journals The role of magnetic sensors in the hybridisation and electrification of vehicles

2019 ◽  
Author(s):  
Marc Kramb ◽  
Rolf Slatter
Keyword(s):  
Power Electronics ◽  
Causal Chain ◽  
Rogowski Coil ◽  
Magnetic Sensors ◽  
Current Sensor ◽  
Electrical Currents ◽  
Limited Bandwidth ◽  
Switching Losses ◽  
Current Sensors ◽  
Rogowski Coils

Electrical currents need to be measured in a wide variety of different applications in the field of power electronics. However, the requirements for these measurement devices are becoming steadily more demanding regarding accuracy, size and especially bandwidth. In order to increase the power density of power electronics, as particularly important in the field of electromobility, there is a clear causal chain. Soft switching leads to higher efficiency and higher frequencies, which enable smaller dimensions for a given power output. Higher switching frequencies allow the size of magnetic components to be reduced significantly, resulting in more compact and lighter designs. This trend is now being reinforced by use of new wide bandgap semiconductor materials like silicon carbide (SiC) and gallium nitride (GaN), as their low on-resistances and low parasitic capacitances reduce switching losses. Conventional current sensor solutions, e.g. hallor shunt based sensors exhibit a limited bandwidth, typically less than 250 kHz. Other current sensors, like those based on the Rogowski-Coil, are capable of highly dynamic current measurement, but are significantly more expensive, larger and hence not suitable for large series applications. Furthermore, Rogowski-Coils are only capable of measuring alternating currents (AC), which prevents their use in applications where DC currents must also be measured. In order to meet the above mentioned requirements, magnetoresistive (MR) current sensors are ideally suited due to the fact that the bandwidth of the magnetoresistive effect extends up into the GHz-range. This paper describes the principle of operation and main performance characteristics of highly integrated MR current sensors and describes their benefits compared to other types of current sensor, in particular with regard to applications in the hybridisation and electrification of vehicles.

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