This system has been designed for a Hospital located in Dominican Republic, an area where the existing mains experience energy demand peaks exceeding their capacity.
There are two 900 KVA LTP soundproof gensets, model IT-865, equipped with an MTU Diesel engine, at 60 HZ.
Each genset has a panel integrated into the sets’ chassis for island synchronisation with the DSE 8610 control module (to synchronise both sets with each other), along with a shared external ATS panel for the sets and the mains, which enables the synchronous operation of both gensets with the mains. The DSE 8660 control module and two 2500A motorised thermomagnetic circuit breakers are the components of this ATS panel.
The sets can operate in two different ways with this system:
As a backup in the event of mains failure:
The sets are in stand-by when the mains are available within acceptable parameters.
In the event of mains failure, both sets will start simultaneously, synchronise, and take on the load. Depending on the load required by the facility at any given time, both sets will continue supplying power, or one will stop and the other will take on the full load until consumption is above a specific (programmable) threshold, at which point the second set will start again, synchronise with the first set, and take on the load.
When the mains are back up, and acceptable voltage and frequency parameters are reached, both sets will synchronise with the mains and the load will be transferred to the latter without losing power supply at any point. After an acceptable cooling time, the sets will stop, leaving them ready to start on the next mains failure.
To support excess in energy demand:
For this configuration, the gensets will start simultaneously, synchronising with each other and with the mains, to start supplying power along with the mains when the facility’s energy demand is higher than the supply available through the mains. There are two operational modes in this configuration:
- The sets’ control modules can be configured for peak-shaving, a mode where the sets will provide the energy that cannot be supplied by the mains to the facility, balancing the power supplied by the sets according to the facility’s needs, and consuming the maximum energy available or up to the limits contracted through the mains.
- Additionally, the sets’ control modules can be configured to have the sets providing a steady (adjustable) power, leaving the energy demand changes of the facility to be supplied by the mains. This mode is known as base-load.