New automatic digital voltage regulator

Louise Smyth

Leroy-Somer and Kato Engineering have introduced the D700, an automatic digital voltage regulator specially designed to meet the challenges of energy production in the digital age.

The D700 includes all necessary regulator functions, smart grid capabilities, and numerous additional functions and options that make it versatile.

Along with network synchronisation management, it features multiple regulation modes, including regulation based on the power factor at the point of delivery or at generator output (especially for networks operating in parallel). Profile monitoring and various Grid Code regulation specifications can thus potentially be programmed directly into it.

For the first time, all excitation types are supported up to 25A in continuous operation (50A in the event of short circuit). In addition, the D700 can control an external power module that makes it possible to offer static excitation systems up to 1500A. A special double regulation board is also available to ensure total system redundancy.

The D700 also includes multiple patented solutions based on expertise and knowledge drawn from Nidec alternators. These functions, such as redundant power bridge, curve functions, simplified load sharing, and excitation limits can be used to improve global system security.

In addition to regulation functions, it also includes many components and options that make it flexible: a data logger, programmable logic, equalisation and synchronisation, remote regulation, communications bus, current compensation, and a ‘black start’ capability (without auxiliary power supply).

The D700 is designed to integrate into complex systems (including networked systems). In some cases, it can even control certain application processes to avoid the need for an additional system (such as an automaton). The control software supplied is intuitive, and it also includes an integrated oscilloscope function.

The D700 was also designed to be integrated in the GenOSys system (Leroy-Somer and Kato Engineering’s recently launched remote power management system). When integrated into GenOSys, it is able to carry out remote installation monitoring, including a system of alerts and the use of mathematical models for predictive maintenance.