In this paper, a strategy based on Genetic algorithm for optimal allocation of reactive power resources in distribution system with microgrid is presented. In the proposed approach uncertainty in power generation of renewable based DG is considered. The main objective is to allocate fixed and switched capacitors as reactive power resources for voltage control within the desired limits on a dist...

Micro hydro power plants (µHPP) are typically used to supply electric energy microgrids outside the national grids taking care of frequency control isolated system. A conventional way maintain load balance in system is use thyristor switched AC-AC converters controlled dump loads. disadvantage their reactive consumption decreasing factor at generator output. To avoid this problem authors have e...

The emerging switched-capacitor-based multilevel inverters offer interesting merits such as self-balancing of capacitor voltages and boosting voltage gain. While the switched capacitors (SCs) in these topologies are charged parallel with dc source, severe current spikes issue is inevitable, rendering them impractical at high power. This article proposes a novel T-type inverter that mitigates by...

In this article, a step-up seven-level inverter supplied by single dc source suitable for renewable energy application is presented. Forming the desired output realized charging capacitors and synthesizing them based on switched-capacitor concept. This structure praised ability of sensorless voltage balancing capacitors, reducing control complexity to produce bipolar staircase waveform. It also...

In this paper, we propose a novel intelligent reflecting surface (IRS) structure, which is capable of jointly forming desirable beam and polarization reflected wave with the aid massive elements. More specifically, proposed IRS composed unit cells, each having multiple variable capacitors. Active tuning capacitances capacitors in cell provides full coverage 360° reflection phase. Furthermore, s...

In the last thirty years, integrated gate-commutated thyristor (IGCT) has been employed in medium voltage $\,\mathrm{M}\mathrm{W}$ power level converters and demonstrated some of lowest conduction losses any actively controlled device t...

In this paper Simulink model of PWM controlled Cycloconverter with Thyristor and IGBT switches has been analyzed. The dynamic performance of Cycloconverter has been compared with Thyristor and IGBT switches. In the Simulation, PWM control the output voltage with change in input voltage of Cycloconverter. The output frequency of Cyclocoverter has been taken as two times the input frequency to th...

In this article, various modulation strategies and hysteresis-band control of a recently introduced dual-boost nine-level inverter (DB9LI) are implemented. DB9LI is switched capacitor based capable generating symmetrical nine output voltage levels by employing single DC source. The topology generates boosted bipolar at the side without applying end-side H-bridge (usually employed to generate ne...

<span>The rise in demand for electricity and the high cost of constructing new power networks reckons optimal utilization electric overloading excessive transfer along transmission lines, losses, voltage instability, poor quality, reliability issues. Flexible AC system (FACTS) boosts static dynamic performance systems. Although efficient by improving quality profile enhancement is control...