Tag: microgrid

Author SuzannePosted on Categories Climate Change & Energy, ForestsTags , , , ,

PG&E unveils first 100% renewable remote power system at Pepperwood Preserve

Mary Callahan, PRESS DEMOCRAT

Pacific Gas & Electric Co. and Pepperwood Preserve unveiled the state’s first fully renewable, stand-alone power system at the nonprofit group’s remote site in the Mayacamas Mountains on Monday — part of the utility’s push to eliminate last-mile distribution lines from especially fire-prone areas.

The new remote, solar-powered system is owned by PG&E and will allow the utility to remove nearly three-fourths of a mile of overhead distribution lines that cascade down a wind-swept hillside. It eliminates, as well, the associated maintenance burden and wildfire liability that power lines in mountainous areas represent.

But it also will serve as a replicable model that can be used in hundreds of other locations to reduce first risk and make for a more resilient power supply, project partners said.

It is part of PG&E’s overall system hardening efforts, developed in the wake of catastrophic wildfires caused by faulty power equipment during extreme winds. Other measures include burying power lines and strengthening power poles and overhead lines.

Read more at https://www.pressdemocrat.com/article/news/first-100-renewable-remote-power-system-installed-at-pepperwood-preserve/?pupeml=5144

Author SuzannePosted on Categories Climate Change & Energy, ForestsTags , , , , ,

California’s looming wildfire threat requires a cleaner, more resilient electrical grid

Ted Lamm & Ethan Elkind, CALMATTERS

California’s electrical grid is getting cleaner, but it is still not well positioned to deal with a changing climate with its web of decades-old poles and wires.

As California communities confront the reality of emerging from coronavirus shelter-in-place orders, another inevitable crisis that also requires aggressive preventative action looms: wildfire season.

In the face of this persistent threat, we need aggressive integration of clean energy technologies to power a reliable and resilient electricity grid for our homes, health care systems, transportation networks and supply chains.

Californians are familiar with the ways that climate change is increasing our wildfire risk, with six of the top 10 most destructive fires in state history occurring in the past three years. California’s electrical grid stands in the middle of this increasingly complex predicament.

At least three of those fires were triggered by utility equipment, including the 2018 Camp Fire, which took 85 lives in the process of destroying 18,000 structures and the town of Paradise. 2019 brought widespread public safety power shut-offs and far less destructive fires throughout the state, but at the cost of new outage-related risks for vulnerable communities and residents – a trade-off we may be making for the next 10 years or more.

California’s electrical grid is getting cleaner, but it is still not well positioned to weather this changing climate. Today’s grid features a web of decades- and century-old poles and wires, even as the state obtains a record level of energy from cutting-edge solar and wind technology.
Continue reading “California’s looming wildfire threat requires a cleaner, more resilient electrical grid”

Author SuzannePosted on Categories Climate Change & EnergyTags , , , ,

Greater wildfire risks prompt growth of electrical ‘microgrids’ to rely less on PG&E

Martin Espinoza, THE PRESS DEMOCRAT

In his standard blue jeans and unbuttoned flannel shirt, David Liebman could blend in with many of the young students walking to and from classes at Santa Rosa Junior College.

But Liebman, manager of energy and sustainability for the college district, has something bigger on his mind than class assignments and midterm projects.

Liebman, 27, is heading a $5 million electrical infrastructure project that addresses climate change and fundamentally will transform the way energy is distributed and used on campus.

Using the new solar arrays at the Santa Rosa campus, Liebman is coordinating the development of an electrical microgrid that could operate independently of PG&E during nearby wildfires, or when the escalating threats of fires in the age of climate change prompt the utility to temporarily turn off power.

“Unless we change the infrastructure that runs our society, we’re going to be in a lot of trouble because we won’t be able to adapt to the significant changes that are happening to both the environment and technology in general,” Liebman said.

Fueled by solar energy and equipped with battery storage and a complex control system, the SRJC project is a small part of a much larger movement environmental experts say could fundamentally flip the paradigm on energy usage here and across the country. Before, massive power plants were turned on to meet demand for electricity; now, microgrids could help do that with available renewable energy such as solar, wind and geothermal.

In Sonoma County, microgrid systems would allow key institutions such as hospitals, municipal utilities, a college campus and certain government agencies to continue to operate in the event of a natural disaster that interrupts PG&E’s electrical transmission and distribution.

Local interest in microgrids has heightened with the prospect of Pacific Gas & Electric shutting off power during times of high fire risk.

To provide a model for developing the mini-power networks, a microgrid laboratory has risen just west of the town of Sonoma, at the Stone Edge Farm Estate Vineyards & Winery. The multimillion-dollar microgrid — a testing ground for the latest renewable energy and storage and control technology — encircles 16 acres of vineyards, olive trees and fields of heirloom vegetables and fruit.

Read more at https://www.pressdemocrat.com/news/10027255-181/greater-wildfire-risks-prompt-growth

Author SuzannePosted on Categories Climate Change & EnergyTags , , , ,

Solar panels to help power Santa Rosa micogrid

Kevin McCallum, THE PRESS DEMOCRAT

When California’s energy grid gets stressed out during heat waves, energy managers send out so-called flex alerts asking people to conserve energy.

An innovative energy project underway in Santa Rosa aims to take that flexibility to new levels by helping a huge energy user — the city’s water treatment plant — quickly reduce its energy usage while still performing its core mission of cleaning water.

A 125-kilowatt solar array popping up above the parking lot of the Laguna Subregional Water Reclamation plant on Llano Road is the first visible sign of a yearslong effort to turn the plant into a microgrid capable of reducing its use of electricity from the grid.

“Increasing our flexibility to produce energy on-site allows us to adjust our demand on the macro grid, and doing that is worth money,” said Mike Prinz, deputy director of Santa Rosa Water.

Microgrids, as the name implies, are small electric networks that can operate, to varying degrees, independently of the larger electrical grid managed locally by Pacific Gas & Electric Co.

The solar panels are not the core of the new system, but will help recharge the batteries that are being installed later this year as part of the project.

Read more at http://www.pressdemocrat.com/news/8305925-181/solar-panels-to-help-power

Author SuzannePosted on Categories Climate Change & Energy, Sustainable LivingTags , , , Leave a comment on SolarCity launches community microgrids with Tesla batteries

SolarCity launches community microgrids with Tesla batteries

Jeremy C. Owens, SAN JOSE MERCURY NEWS
SolarCity, well-known for rooftop solar systems, is expanding to so-called microgrids, larger power systems that can be tapped by communities when the power grid goes down.
The systems, which add generators and software to manage the power to standard solar panels, will include Tesla Motors batteries to store the energy generated. While the owner can tap the solar power for daily use, the main purpose is to maintain electricity in the event of a natural disaster such as an earthquake or hurricane.
“There has been a dramatic increase in severe weather events the last few years — climate-related, almost certainly — and its led to more grid outages,” SolarCity spokesman Jonathan Bass noted, pointing to the storm known as Sandy that hit the Northeast last year as a prominent recent example.
The company is targeting cities that are in the line of fire for such catastrophic events for the new service.
“Traditionally, microgrids have been used in campuses, medical facilities and military bases, and we will pursue some of those opportunities if they become available,” said Daidipya Patwa, who is leading SolarCity’s microgrid efforts, “but our primary target is municipalities, communities and areas with a weak grid or no grid at all.”
Read more via SolarCity launches community microgrids with Tesla batteries – San Jose Mercury News.