Grid Data and Measurement System (GDMS) technology is an entirely new and cost-effective way of communicating with electrical assets or devices connected to an electricity network, marking a significant step towards a smart energy revolution.
How GDMS works
Connected devices send and receive data across the electricity network through a minute and subtle changes made to the grid frequency by modulating the power consumption of transmitting devices. These ‘on’ and ‘off’ or frequency changes create a unique code. Receivers, embedded in the plugs of devices, such as freezers, hot water tanks, and air conditioning equipment, are programmed to detect these frequency changes. Receiving devices then identify and decode the messages, which automatically tell the device to carry out a particular instruction, for example, to tell the device to take action such as turn down or turn off according to a schedule, or based on grid frequency changes.
GDMS allows for faster, automated responses from assets so they can be used for higher value, system-critical, load-balancing services like frequency response.