In Gas Insulated Substations (GIS), a free conducting particle can approximate any shape. If the conductor surface is not smooth and rough, then dielectric strength will be lost. So, to regain the dielectric strength, which was lost, the conductor inner surface is coated with a dielectric material of epoxy resin for which the dielectric strength can be regained. In this paper, work of simulation is done forvoltage class 132kV, 145kV,220KV and 245KVin a 1-ϕGIB for Al & Cu particles and peak radial movement was found. All the simulation analysis was carried out and resultsare shown in detail.
Worldwide, all the countries looking towards the renewable energy based electrical power generation. The solar energy is the primary renewable energy source. In the photovoltaic solar energy conversion system (PVSECS), the electrical energy is generated from the solar energy. In the rural area, operation and maintenance of PVSECS is difficult. If the systems are monitored through online, only under repairing conditions, the respective expert will visit the plant and it reduces the operating cost. In this paper, presents the maximum power point tracking is maintained by controller (ESP32), light dependent resistors, and DC servomotors with driver circuit. The load is regulated by the controller using relays and the data send to the cloud. This data is useful for the online monitoring of the system. A prototype of PVSECS is developed and its simulation results also presented in various conditions.
Ability of multilevel inverters (MLI) to operate with matured medium power electronic devices has enhanced their prominence for active front converters in various applications such as drive control, battery energy storage systems and PV/Grid integrated systems. In short, Active front end (AFE) converters are regenerative rectifiers incorporated to, simultaneously regulate dc-link voltage and ensure unity power factor at source terminals. Realizing the significance of MLI based active front end converter, this paper presents Simulink implementation of MLI based active front end converter, using most popular classical MLI i.e., cascaded H-bridge. Imposing level shifted and phase shifted carrier arrangements, implementation PWM for CHB is demonstrated and MATLAB simulation results for both open loop and closed systems are presented.
In this work, the optimal placement and parameters of UPFC in Electrical Power transmission Systems is calculated. The FACTS are combination of controlled devices to increase reliability & stability of power networks. The flexible transmission devices are located in more places the working of parameters like impedance, voltage, and phase angle can improved. FACTS devices gives transmission system flexibility improvement through better new utilization of facilities like more system reliability, improved dynamic and transient stability and also power supply quality increased. Flexible transmission systems can be connected shunt or series with power line and also like shunt–series combination. To compensate voltage drops and controlling of voltage the series compensation and for current control the shunt compensation is provided in power transmission. Further, to minimize the losses and enhancement of load ability and voltage stability, the UPFC is used in power system and it is an advanced device of FACTS group. The presented system is simulated by MATLAB/Simulink for the verification of the performance of the technique.
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