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Smart Grid is replacing Traditional power grid due to modernization of communication and Information Technology. Hence the grid is highly vulnerable to cyber physical attack, which is also known as False Data Injection Attack (FDIA). In order to protect electric grid from these cyber attack it is very important to continuously monitor the electric power system. This paper highlights the comparison...
Security of Smart Grid is the main issue in power sector. The power sector is highly vulnerable to cyber physical attack as it uses modern infrastructure and communication devices. The Security of power system demands that the real time operation of power system should not be affected under occurrence of events. Contingency or outage of transmission line is one of the major events occurring in the...
Air core reactors are used widely for fault current limiting applications in the power system. The magnetic field in the vicinity of an air core reactor is larger than iron core reactors due to absence of low reluctance path. Thus the magnetic field around an air core reactor reaches levels hazardous to human life during certain operating conditions. It is important to determine the clearance to be...
A solid-state modulator rated for 50 kV, 120A, 4μs and 250 Hz has been designed. The discharging circuit of the modulator is being tested at ∼ 33 kV, 40–80A, at a maximum pulse repetition rate of 30 pps. The paper discusses development and testing of prototype discharging circuit on resistive load and magnetron. The technique used for measurement of pulse transformer leakage inductance, distributed...
Marx generator connected to peaking capacitor and peaking switch can generate Ultra-Wideband (UWB) radiation. A new peaking switch is designed for converting the existing nanosecond Marx generator to a UWB source. The paper explains the particle in cell (PIC) simulation for this peaking switch, using MAGIC 3D software. This peaking switch electrode is made up of copper tungsten material and is fixed...
For maintaining security and reliable operation of distance relays power swing blocking is necessary to prevent maloperation during power swings and high impedance faults detection is necessary for operation of distance relays, since distance relays may treat high impedance faults as load since the fault will be out of reach of the relay. This paper proposes an algorithm for differentiation of faults...
This paper presents the application of Prony analysis and radial basis function technique in estimating the fault location on transmission lines for a two area test system. Prony method is used for data pre-processing and this data are further used for training and testing radial basis function (RBF) network. Prony analysis is used to extract the modal contents and inter-area oscillation symptoms...
The Indian electrical grid is one of the largest & complex networks in the world. Such complex system is subjected to stress or disturbances which manifest in the form of low frequency oscillations. Monitoring of these oscillations is necessary as they can disrupt the system if they are sustained for a longer period of time with significant magnitude. This paper presents the analysis of low frequency...
Partial Discharge (PD) is the localized breakdown which does not completely bridge the gap between the electrodes. PD is the major cause of insulation degradation and eventually leads towards breakdown of the high voltage insulation system. Ionization of gas (medium) is the phenomena which occur inside the voids in dielectrics during the discharge. This paper makes an attempt to understand the PD...
Partial Discharge (PD) is the localized breakdown which does not completely bridge the gap between the electrodes. PD is the major cause of insulation degradation and eventually leads towards breakdown of the high voltage insulation system. Ionization of gas is the basic process which occurs inside the dielectric bound cavities during the discharge. Many particles like electrons, ions, photons etc...
Ultra Wideband (UWB) system has many applications such as target object detection, transient radar, mine clearing, detection of crack on underground pipeline, water purification, electronic effects testing, and jamming. This system consists of Marx generator, peaking capacitor, peaking switch and radiating element (antenna). The complete transient analysis of half transverse electromagnetic (HTEM)...
This paper discusses the UWB system consisting of a high voltage low rise time pulse generator feeding the pulse to an antenna. The modeling and analysis of half transverse electromagnetic (HTEM) horn type antenna with an input feed of 25 ns and 5 ns rise time and voltage of 113.75 kV is studied. The electrodynamic modeling is done using CST microwave studio software. The E far field intensity is...
Pulse modulators generate high power pulses which are used for various industrial applications. This paper discusses the numerical validation of pulse transformer used in a pulse modulator wherein the pulse is created by switching on a capacitor in parallel to the pulse transformer using a solid state switch. The pulse transformer is connected to resistive load. The numerical validation was undertaken...
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