ACCURACY OPTIMIZATION OF KWH HIGH VOLTAGE CONSUMER TRANSACTIONS WITH SELECTION OF CURRENT TRANSFORMER (CT) RATIO IN ACCORDANCE WITH CONTRACTED POWER

Soetjipto Soewono(1), Nanang Hadi(2),


(1) Institute Technology PLN
(2) Institute Technology PLN
Corresponding Author

Abstract


The greater growth of electricity consumption, especially for high voltage consumers, it is important for PLN to know the effect of the current transformer (CT) error ratio in the accuracy of the kwh of electricity transactions, by researching the error ratio of CT 400/1 and 800/1 R, S, and T phase. When the contracted power of 120 MVA can be used CT class 0.2s ratio 400/1 and 800/1 ratio, when using CT class 0.2s ratio 400/1 then the kwh meter can be set according to the CT ratio that is the ratio 400/1 because CT ratio 400/1 has a negative error ratio at loads below 73.59%, and positive error ratio at loads over 73.59% up to 100% load, and` when using CT class 0.2s ratio 800/1 then the kwh meter can set a CT ratio of 800 / 0.98 because CT ratio 800/1 has a positive error ratio of 0.02% from 1% load to 100% load, so that it does not harm the customer as a positive CT ratio error tolerance . This needs to be done in order to create justice between PLN and high voltage consumers in the calculation of kwh transactions.The greater growth of electricity consumption, especially for high voltage consumers, it is important for PLN to know the effect of the current transformer (CT) error ratio in the accuracy of the kwh of electricity transactions, by researching the error ratio of CT 400/1 and 800/1 R, S, and T phase. When the contracted power of 120 MVA can be used CT class 0.2s ratio 400/1 and 800/1 ratio, when using CT class 0.2s ratio 400/1 then the kwh meter can be set according to the CT ratio that is the ratio 400/1 because CT ratio 400/1 has a negative error ratio at loads below 73.59%, and positive error ratio at loads over 73.59% up to 100% load, and` when using CT class 0.2s ratio 800/1 then the kwh meter can set a CT ratio of 800 / 0.98 because CT ratio 800/1 has a positive error ratio of 0.02% from 1% load to 100% load, so that it does not harm the customer as a positive CT ratio error tolerance . This needs to be done in order to create justice between PLN and high voltage consumers in the calculation of kwh transactions.

Keywords


Current transformer (CT), CT class, CT ratio error

References


C. Y. Kai Zhu, "Study on Hot-line Calibration for 10kV Watt-hour Metering Device," IEEE, 2019.

G. Bessolitsyn, "Experimental Study of Current Error of up to 50 Hz Current-measuring Transformer," International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM), 2017.

IEC, "Instrument Transformer part 1: Current Transformer," IEC 60044-1 Edisi 1.2, 2003.

SPLN D3.015-2, "Alat Pengukur, Pembatas Dan Perlengkapannya," Standar PT.PLN (Persero), 2012.

M. Kaczmarek, "Measurement error of non-sinusoidal electrical power and energy caused by instrument transformers," journals the institution of engineering and technology, 2016.

SPLN D5.001, "Pedoman Pemilihan Meter Energi," Standar PT.PLN (Persero), 2008.

Omicron, "CT analyzer user manual," Austria, 2012.

Edmi, "Mk6 genius energy meter user manual," Singapore, 2004.

G. R. Enrico Mohns, "An AC Current Transformer Standard Measuring System for Power Frequencies," IEEE Transactions on instrument and measurement, 2017.

A. D. F. G. Crotti, "Calibration of Current Transformers in distorted conditions," XXII World Congress of the International Measurement Confederation (IMEKO 2018), 2018.

L. Z. iecheng Zhao, "Measurement Accuracy Limitation Analysis on Synchrophasors," IEEE, 2015.

A. L. ,. Katarina Grolinger, "Energy Forecasting for Event Venues: Big Data and Prediction Accuracy," 2016.

F. Kurniadi, "Pengembangan kWh Meter Elektronik untuk Pengecekan CT Konsumen Secara On Site," Jurnal Ilmiah Energi dan Kelistrikan Vol. 11, No. 2, Juli - Desember 2019, 2019.

D. P. Marjan Urekar, "Accuracy improvement of the stochastic digital electrical energy meter," 2016.

C. M. Stefan Siegenthaler., "A Computer-Controlled Calibrator for Instrument Transformer Test Sets," IEEE Transactions on instrument and measurement, 2017.

R. Syahputra, "Characteristic Test of Current Transformer Based EMTP Shoftware," jTE-U, Vol. 1, No. 1, , 2015.

L. K. Zhang Fuzhou, "Error Analysis of Capacitor Voltage Transformer in the Operation Environment," 2016.

D. F. A.J.Collin, "Compensation of Current Transformers’ Non-Linearities by Means of Frequency Coupling Matrices," 2018.

G. P. Alessandro Mingotti, "Effect of Temperature on the Accuracy of Inductive Current Transformers," 2018.

T. Koerniawan and Hasanah, "Kajian Ketelitian Current Transformer (CT) Terhadap Kesalahan Rasio Arus pada Pelanggan 197 kVA," Jurnal Ilmiah Energi dan Kelistrikan Vol. 11, No. 1, Januari - Juni 2019,, 2019.

SPLN D3.014-1, "Trafo Instrument Untuk Sistem Distribusi (Trafo Arus)," Standar PT. PLN (Persero), 2009.


Full Text: PDF

Article Metrics

Abstract View : 14 times
PDF Download : 0 times

Refbacks

  • There are currently no refbacks.