The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This modelling is conducted to finding correlation between transient voltage that injected on bushing and electric field that occur. The method that is used on this modelling is by simulate dry lightning impulse test on bushing for transformer with several software. Bushing type that used on this study is oil impregnated paper. The output of this study is to determine the effect of capacitor grading...
this paper is about a research of lightning detection and mapping system (LDMS) using Time of Arrival (TOA), more specifically, it's about LDMS in the Western Part of Java Island. In this case, the methods are Quadratic Planar Method (QPM) and Linear Spherical Method (LSM) with some algorithms to pick an optimal combination of stations to calculate for each location of lightning, which is three for...
This paper reports the experimental results on the characteristic of thermal aging in oil paper insulation on Dielectric Properties and DGA. Samples are conditioned to the same initial conditions through the heating at a temperature of 100 °C for 24 hours. A number of mineral oil samples with volume of 800 ml and 6 gram insulating Kraft paper were put in hermetical bottles. The bottles containing...
One of the technical problems in the construction of overhead lines 500 kV EHV transmission system Jawa-Bali Crossing is lightning disturbance. The most dominant problem is the height of the crossing tower (376 m) and high density of lightning strikes at the tower site. The potential disruption caused by lightning in the tower leads to insulator flashover on towers that can cause a loss of power flow...
Providing solution for short term load forecasting is a major challenge remained for researchers due to the nature characteristics of load which are non-linear, probabilistic and uncertainty. As the statistical assumption may fail to estimate the load profile precisely, the intelligent techniques play important role to provide alternative solutions. This paper discusses the variant of artificial neural...
This paper deals with electric field analysis on 150 kV GIS bushing using various type of insulation material. The basic bushing insulation model is made from oil impregnated paper with permittivity equals 4. The dimension of the model of bushing before and after modification is same. Modification done by changed the insulation material bushing from oil impregnated paper with relative permittivity...
In this study the effect of core cutting topology in three-phase transformer on its inrush currents is investigated. Two types of similar rating transformers, which have different core cutting topology, were compared experimentally. Transformers are examined by using developed inrush current testing module. Switching firing angle and demagnetization are also considered in the experiment. The inrush...
The efforts to improve the security of a lightning strike is giving a lightning early warning system. One method that can be used to get the warning is to measure the electric field in the atmosphere. Electric field mill (EFM) is an instrument that can be used to measure the strength of electric fields in atmosphere as a result of electrostatic charge in CB cloud and the ground. In this experiment,...
The concern for the supporting power converters is unavoidable in the development of inductive power charging system technology for electric vehicle application. In both the primary and secondary sides, power converters are needed to both generate and harvest the high frequency AC power which is transferred wirelessly in a resonant frequency. In his paper, we develop the power converters that are...
Lighting contributes the highest amount of electricity usage in customer. The efficient and effective use of lighting can offer major energy. LED lamp technology is used today as an efficient light and has the advantage of more durable than conventional lamps. During its operational, LED lamps will suffered the variation voltage. It was caused of energy shortage that happened today and sometimes brownout...
The latest development of power drive system product for electric vehicle in PT. Len Industri is reported. Some of the power drive components used in electric vehicle will be described in brief. The vvvf inverter as the core of electric vehicle will be discussed in detail including the hardware design and the control strategy. Finally, some experimental results from a driving test will be presented.
This paper deals with design of planar Goubau line (PGB) antenna for partial discharge (PD) measurement. In the design, planar Goubau line antennas are simulated with a variety of shapes and sizes by using software HFSS to get the corresponding frequency response with the frequency of occurrence of PD. Planar goubau line antenna is designed with the type of substrate FR4_epoxy ranging from the size...
This paper studies a new digital hysteresis current control to provide high stability power converters. Although the output voltage is sensed by an A-D converter to calculate the digital feedback value, the reactor current is detected by peak and valley current detectors which consist of some analog circuit components. Therefore, the proposed method realizes the real time detection of reactor current...
This paper presents implementation prototype data logger of PV monitoring system based on low cost online monitoring for existing 1.6 kWp single-phase grid-connected photovoltaic (PV) system in Electrical Energy Conversion Research Laboratory (EECRL) of School of Electrical Engineering and Informatics (SEEI), Institute of Technology Bandung (ITB). For cost reduction, the data logger developed by microcontroller...
Rogowski Coil is a current sensor that is often applied to the medium voltage. Rogowski Coil Based PCB Double Helix is a low-power sensor designed to measure the current that can be input into the Gas Insulation Switchgear (GIS). Not only good linearity in the measurement but also wide measurement ranges are needed to measure the disturbances on the power system. Initial signal processing circuit...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.