Smart Grid Solution
Indian power sector is undergoing reformation. RAPDRP programs are going on. Distribution sector is getting privatized. However, here are our observations.
Higher T&D losses and lower equipment life
Commercial losses are being addressed. But we observe a large absence of comprehensive technical approach.For example, at distribution level, network is highly unbalanced. This leads to overloading of transformer windings, overheating equipment, generation of zero sequence currents and significant increases in the losses in Distribution network.
Unaccounted system anomalies in Distribution
Figure 1: Imbalanced - star connected Load
Figure 2 : Imbalanced load leading to Zero sequence currents
iEnergy’s offerings in SmartGrid Solutions:
iEnergy has expertise in many aspects of power systems engineering. iEnergy takes up multi-disciplinary approach including
iEnergy proposes to orchestrate a multi-pronged strategy combining the most advanced control and estimation algorithms combined with advanced hardware to
iEnergy proposes to work closely with utilities and create “Pilots” in one/multiple stagesbased on
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“Top-down vs Bottom-Up Approach”: Traditional power systems approach focused on “top-down” generation-transmission-distribution approach.
The traditional definitions of active power, reactive power, active current, reactive current, power factor, etc., are based on the average concept for both single-phase and three-phase balanced systems with zero harmonics.
However, practical distribution networks are three phase systems which are highly unbalanced, with considerably distorted currents and voltages giving rise to zero sequence currents and voltages.
In case of delta connected transformers due to imbalanced zero sequence currents are generated and they flow around in the windings.
Presence of distributed generation resources further complicates the scenario where in traditional approach has serious limitations.
New approach should enable us to calculate and decompose all components, such as fundamental active/reactive power and current, harmonic current, etc. It should enable us to easily analyze reactive power and/or harmonic compensation systems for a three-phase distorted power system with and without zero-sequence components in the source voltage and/or load current.
Many researchers have proposed approaches to deal with three-phase systems with unbalanced and distorted currents and voltages.
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