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I dont understand that concept. Why is it something new. it looks just as dc current to me.
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Its new because it is an entire electrical system from the power plant, through the power lines, and to your electrical devices that has unique properties in transmission, and new applications not possible with either AC or DC of any form. AC, DC, and SDC can be converted from one to another.
It also creates a new class of electrical components that can be dual function. In the electrolyzer shown in the examples there is a dual component Coil-Electrode. Alternating current from both ends of the wire flows through the coil, and direct current flows from the two wires through the electrode and through the conductive fluid. All without switching polarity. The component is both a coil, and an electrode.
Contrasting and comparing with AC and DC shows unique properties.
With AC you switch polarity.
Not with SDC.
With DC current does not change direction.
Not with SDC.
With AC power lines you emit Electro-Magnetic fields which wastes energy, and is supposedly a health hazard.
Not with SDC.
With DC power lines [if there were any] you have huge resistive losses.
Not with SDC.
With an AC power source electrocution hazard is higher because current changes directions through the body.
Not with SDC.
With SDC an inductive coil and an electrode can be one device with AC flowing through the coil, and DC flowing through the electrode without switching polarity.
Not with AC, or DC.
