Echelon Corp. has announced two microgrid deployments in India and South Africa that integrate distributed generation to compensate for disruptions in utility-supplied power. The deployments are built on Echelon's open-standard, multi-application energy control networking platform powered by its Control Operating System (COS) and incorporate application software and services from its local partners Grene Robotics and Power Meter Technics (PMT). The first-of-its-kind in the two countries, the micro grid deployments involve dynamically managing demand and energy supply mix for a residential community and a retail mall to deliver reliable service cost-effectively.
The model micro grid deployments are at Palm Meadows in Hyderabad, India, and Clearwater Mall in Johannesburg, South Africa. Palm Meadows is an 86-acre integrated gated community with 335 homes and residential services. Clearwater Mall in Johannesburg is a retail building with more than 240 stores. Such microgrids are likely to be a best practice in emerging countries grappling with intermittent power supply, and are also applicable in environmentally conscious countries that are aggressively incorporating renewable and intermittent energy sources into the distribution network. ?
Palm Meadows
The Palm Meadows community ties into the grid at a dedicated
substation and sources energy in bulk from the utility. The community
also runs diesel generators and will incorporate solar generation in the
future. Residences within the community are equipped with Echelon smart
meters that connect into data concentrators at distribution
transformers and feed near real-time usage information to the Networked Energy Systems (NES)
system software. Echelon partner Grene Robotics' Skynet management
application automatically turns on local generation if utility-delivered
power is inadequate. The Skynet software interfaces with the NES system
software and creates a bill for the customer that reflects the
customers' actual use of lower cost grid power and more expensive
locally generated power. Customers have the option of reducing usage at
times when the more expensive energy is being supplied. The Palm Meadows
microgrid is providing reliable service even during frequent utility
grid outages and enabling the customer to make intelligent trade-offs
between comfort and cost.
Clearwater Mall
The frequency and length of blackouts in South Africa
can have devastating effects on its commercial sector. For example, the
local South African public utility had to institute a system of rolling
blackouts over a period of four months to balance electricity demand,
in which supply was interrupted at least once or twice a day on an
average of four hours at a time. The Clearwater Mall tenants, which
consist of nine anchor stores, and more than two hundred other local and
international fashion and quick serve food outlets, restaurants, banks,
electronic goods and other specialty stores, require reliable
electricity so they can continue to run their business. The mall's new
retail micro grid solution, based on Echelon partner PMT's
Meteringonline energy management application, employs Echelon smart
meters, data concentrators, and NES system software to submeter
individual tenant usage, so they can pay only for their actual energy
usage rather than the industry norm of paying for energy on a square
footage basis. Furthermore, tenants can opt-in to power supplied by
local back-up generation when blackouts occur. PMT's Meteringonline
application interfaces to Echelon's system software and reconciles usage
with energy source, allocating tariffs based on actual use. The
on-demand energy services allow the store owners to manage their energy
usage and associated costs and maximize revenues.
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