A High-Precision Current Transformer for Loss Measurements of EHV Shunt Reactors

So, E.; Verhoeven, Rob; Simons, Bart; Parks, Harold; Angelo, D.

doi:10.1109/tim.2019.2899184

Cited by 9 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As reported in [ 5 ], the EECT’s ratio errors of less than 10 × 10 −6 in both magnitude and phase can be achieved at power frequencies. In either case, such errors can be attained only with sandwich-like core assembly, which significantly adds to the manufacturing costs [ 6 , 7 ].…”

Section: Introductionsupporting

confidence: 58%

See 1 more Smart Citation

Current Ratio and Stability Issues of Electronically Enhanced Current Transformer Stimulated by Stray Inter-Winding Capacitance and Secondary-Side Disturbance Voltage

Zajec

2022

Sensors

View full text Add to dashboard Cite

Electronically enhanced current transformers (EECT) have gained much interest in power quality assessment. Their magnitude and phase angle error, which mainly relates to the properties of the ferromagnetic materials used, the impedance of the secondary load, and the inter-turns capacitance, are thoroughly analyzed. In contrast, the capacitance between the windings, i.e., inter-winding capacitances and their limiting effects on EECT operation, are rarely analyzed in detail—in particular, no details on the control design of the assisting electronic unit, its tuning recommendations, or both are provided. In this paper, the capacitive coupling between indication and compensating winding of EECT with simplified feedthrough construction is analyzed thoroughly in terms of current ratio error and stability of the implemented configuration of the trans-conductance amplifier. The preliminary assumption about the adverse effect of the inter-winding capacitance shunting both ends of the original amplifier, composed of two series-connected inverting amplifier stages, was confirmed and resolved within a modified amplifier with the help of a simplified simulation model and was experimentally proven with measurements on a custom-built EECT prototype. Furthermore, the analyzed phenomena were linked to trans-conductance amplifier parameters, explicitly with its compensating networks, and summarized in their design guidelines. Throughout the paper, the EECT features obtained with original and modified amplifier designs are compared with the plain composite current transformer to demonstrate the benefits of the modified amplifier, especially its robustness against inter-winding capacitance variations.

show abstract

Section: Introductionsupporting

confidence: 58%

“…In either case, such errors can be attained only with sandwich-like core assembly, which significantly adds to the manufacturing costs [ 6 , 7 ]. Another cost driver is a multi-stage structure suggested in [ 5 , 8 , 9 ]. In either case, the generalized EECT requires at least two cores.…”

Section: Introductionmentioning

confidence: 99%

Current Ratio and Stability Issues of Electronically Enhanced Current Transformer Stimulated by Stray Inter-Winding Capacitance and Secondary-Side Disturbance Voltage

Zajec

2022

Sensors

View full text Add to dashboard Cite

show abstract

“…Figure 2a shows the single line diagram for connections of differential relay based on Kirchhoff's current law [10]. In Figure 2a, the current transformers are used as current sensors that essentially stepdown current with high fidelity [11]. The relay receives input from CTs, and continuously monitors and compares current.…”

Section: Differential Relaymentioning

confidence: 99%

A Detailed Testing Procedure of Numerical Differential Protection Relay for EHV Auto Transformer

et al. 2021

View full text Add to dashboard Cite

In power systems, the programmable numerical differential relays are widely used for the protection of generators, bus bars, transformers, shunt reactors, and transmission lines. Retrofitting of relays is the need of the hour because lack of proper testing techniques and misunderstanding of vital procedures may result in under performance of the overall protection system. Lack of relay’s proper testing provokes an unpredictability in its behavior, that may prompt tripping of a healthy power system. Therefore, the main contribution of the paper is to prepare a step-by-step comprehensive procedural guideline for practical implementation of relay testing procedures and a detailed insight analysis of relay’s settings for the protection of an Extra High Voltage (EHV) auto transformer. The experimental results are scrutinized to document a detailed theoretical and technical analysis. Moreover, the paper also covers shortcomings of existing literature by documenting specialized literature that covers all aspects of protection relays, i.e., from basics of electromechanical domain to the technicalities of the numerical differential relay covering its detailed testing from different reputed manufacturers. A secondary injection relay test set is used for detailed testing of differential relay under test, and the S1 Agile software is used for protection relay settings, configuration modification, and detailed analysis.

show abstract

“…Typical contactless current sensors include current transformers, optical current sensors, Hall sensors and magnetoresistive sensors. [ 3–5 ] However, with the miniaturization and integration of electronic devices, the limited space and power supply of electronic devices has demanded higher requirements for those current sensors. Besides, the higher internal temperature due to the confined space in those electronic devices also requires the current sensors with higher heat resistance.…”

Section: Introductionmentioning

confidence: 99%

“…Typical contactless current sensors include current transformers, optical current sensors, Hall sensors and magnetoresistive sensors. [3][4][5]…”

mentioning

confidence: 99%

Current Detection and Energy Harvesting Integrated Magnetoelectric Sensor with Flexibility and Heat Resistance Based on Polylactide/VB₂ Composites and FeCoV

Ling

Zhang

et al. 2022

Adv Materials Inter

View full text Add to dashboard Cite

contact sensors, such as current shunts, exist safety risk due to lacking of electrical isolation. The contactless sensors are isolated from the primary current, which gives them the advantages of high insulation safety and convenient measurement. Thus, they attract numerous research attentions in recent decades. Typical contactless current sensors include current transformers, optical current sensors, Hall sensors and magnetoresistive sensors. [3][4][5]

show abstract

A High-Precision Current Transformer for Loss Measurements of EHV Shunt Reactors

Cited by 9 publications

References 9 publications

Current Ratio and Stability Issues of Electronically Enhanced Current Transformer Stimulated by Stray Inter-Winding Capacitance and Secondary-Side Disturbance Voltage

Current Ratio and Stability Issues of Electronically Enhanced Current Transformer Stimulated by Stray Inter-Winding Capacitance and Secondary-Side Disturbance Voltage

A Detailed Testing Procedure of Numerical Differential Protection Relay for EHV Auto Transformer

Current Detection and Energy Harvesting Integrated Magnetoelectric Sensor with Flexibility and Heat Resistance Based on Polylactide/VB₂ Composites and FeCoV

Contact Info

Product

Resources

About

A High-Precision Current Transformer for Loss Measurements of EHV Shunt Reactors

Cited by 9 publications

References 9 publications

Current Ratio and Stability Issues of Electronically Enhanced Current Transformer Stimulated by Stray Inter-Winding Capacitance and Secondary-Side Disturbance Voltage

Current Ratio and Stability Issues of Electronically Enhanced Current Transformer Stimulated by Stray Inter-Winding Capacitance and Secondary-Side Disturbance Voltage

A Detailed Testing Procedure of Numerical Differential Protection Relay for EHV Auto Transformer

Current Detection and Energy Harvesting Integrated Magnetoelectric Sensor with Flexibility and Heat Resistance Based on Polylactide/VB2 Composites and FeCoV

Contact Info

Product

Resources

About

Current Detection and Energy Harvesting Integrated Magnetoelectric Sensor with Flexibility and Heat Resistance Based on Polylactide/VB₂ Composites and FeCoV