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Series compensation is a straightforward and cost effective way to improve power transmission capacity and preserve voltage stability, particularly in bulk transmission corridors. The latter is called Thyristor Controlled Series Capacitor (TCSC). Series Compensation can be fixed or controllable. The most advanced version of this technology is called SVC Light and has additional features, in particular more powerful flicker compensation to stabilize heavy and rapidly fluctuating loads, for example arc furnaces, and to smooth voltage flicker. Examples of FACTS devices are: Static var compensation (SVC), uses an electrical device (see Static var compensator) to regulate and stabilize voltage in bulk power systems. The technologies can be installed in new or existing power transmission and distribution lines. (See HVDC.)įACTS (Flexible Alternating Current Transmission Systems): Refers to a group of technologies that enhance the security, capacity and flexibility of power transmission and distribution systems. The other situation in which DC transmission is advantageous is when connecting asynchronous grids, ie, where adjoining electricity grids have different frequencies (eg, 50 or 60 Hz, as happens in some parts of Brazil and the United States). In the conversion between the two forms of power, known as rectification, incurs additional power losses and so it is worth while only when these losses are less than would be incurred by AC transmission, ie, over very long distances (~1000 km for overhead lines, ~100 km for underwater). The transmission of DC current has very low losses. At the other end of the process, the DC power must be converted back into AC, and fed into the AC-transmission or distribution network. In order to transmit electrical power as DC, the alternating current generated in the power plant must be converted into DC. This means that, in a DC system, only real (or active) power is transmitted, making better use of the system’s capacity. As a result, DC does not generate reactive power (see Reactive Power). The collaborative environment of ABB Ability™ System 800xA delivers a plant wide overview that enables operator effectiveness and asset optimization.ĭirect current (DC): This is electrical current that does not alternate (see Alternating current), the electrons flow through the circuit in one direction.
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The platform’s client-server architecture streamlines controller communications, centralize configuration and back-up task, and provides system-wide management of data for trend, history and audit trail purposes. Based on Aspect Object technology, ABB’s integration architecture relates all plant data (the Aspects) to specific plant assets (or Objects). At the core of ABB Ability™ System 800xA is a flexible integration platform that provides the means of achieving measurable productivity and profitability improvements. This means that ABB Ability™ System 800xA is not only a Distributed Control System (DCS) it’s also an HMI SCADA, electrical control and power management system, a safety system and much more. It extends the scope of traditional control systems to include all automation functions within a single operations and engineering environment.
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ABB Ability™ System 800xA: The ABB Ability™ System 800xA is used in many industry sectors to oversee and control a wide range of processes.