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The IEC standard or the International Electrotechnical Commission is a mathematical standard in modeling inverse curve characteristic of overcurrent relay or OCR. Using the IEC standard allows for inaccurate coordination of the relay such as the intersection of the inverse curve, because this standard does not always correspond to various problems in the industry. Accordingly, in this research paper...
High impedance faults are not easy to be measured and detected by convetional relay protection. This paper proposed simualtions studies for detection high impedance fault in extra high voltage transmission line (EVT). The fault simulations based on simplified 2 diodes model. Current signal from the measurement is processed using discrete wavelet transform type haar wavelet to obtain coefficient detail...
Photovoltaic (PV) Module is becoming important source as renewable energy due to low maintenance requirements and environmental friendliness. PV module has low efficiency. Hence, The Maximization of PV module become an essential concern. Maximum power point tracking (MPPT) methods required to obtain maximum power point (MPP) of PV module. In this paper, proposes modified firefly algorithm to track...
Create an accurate model with over-current relays (OCRs) play an important role in the coordination of power system protection. Modeling of the OCR using methods like the direct data storage and software models gave only approximate models. Moreover, modeling based on mathematical models is not appropriate to deal with ill-defined and uncertain systems. Therefore, in this paper proposes modeling of...
Overcurrent relays (OCRs) play an important role in the protection component that requires high reliability to maintain high security for power systems. Modeling of the OCRcurve using methods like the direct data storage and curve fitting gave only approximate models. Therefore, in this paper proposes modeling of OCRs using Levenberg-Marquardt backpropagation (LMBP). An implementation of OCR in the...
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