DECS-2100 — excitation system for DC currents up to 10,000 A

Description

DECS-2100 is a powerful and flexible excitation system that precisely regulates, protects and monitors synchronous generators and motors. Its multifunctional design allows it to be used in a wide range of installations with excitation currents up to 10,000 A DC — on large power plant generators, synchronous condensers and powerful synchronous motors. A key feature of the power section is the withdrawable power units (Power Drawers): complete rectifier bridges can be serviced both during operation and with the machine stopped, which shortens or eliminates excitation downtime. A wide choice of redundancy schemes increases reliability, and the optional supervisory channel prevents false trips by comparing three controllers on a «two out of three» principle. The system includes a set of limiters coordinated with the protections, built-in protective functions, two groups of regulation gains depending on the load, two groups of limiter and protection settings for different operating modes, smooth start without voltage overshoot, time synchronisation, recording of the sequence of events and oscillography, real-time monitoring and built-in test facilities. The optional power system stabiliser based on the integral of accelerating power damps local, inter-system and inter-unit oscillations. The BESTCOMS™Pro software combines programmable logic, a built-in simulator, system monitoring, commissioning tools, event viewing and configuration with detailed help; settings are entered graphically with error checking and summary screens. Touch panels IDP-1500 and IDP-1201 are offered for operator control. The company's own engineering, production and test facilities ensure quality control and shortened delivery times. An example is the replacement of an obsolete GE excitation system at a large station of a utility in the US Midwest: the DECS-2100 system was manufactured at the manufacturer's plant, delivered in parts and installed together with an air-conditioned control room; it was commissioned in December 2016. The producer designs and manufactures excitation regulators, protection systems and controllers at its plants in the USA.

Technical specifications