Energy Exchange

Here Comes the Sun: How California is Bringing More Renewables to the Grid

Have a sunny dayAsk most people what the Beatles and California have in common and they might very well be at a loss. However, the answer is pretty simple: they are both unabashed trendsetters in the face of resistance – the former in their musical style and the latter in its clean energy policies.

Not content with setting a Renewable Portfolio Standard that ends at 2020, Governor Jerry Brown and state legislators are pushing for the Golden State to get 50 percent of its energy from renewable resources by 2030.

To meet this ambitious target, California must build a system that is largely based on renewable electricity, like wind and solar. This is not an easy task. The primary reason? Sunshine and wind are only available at certain times of the day and can be variable during those times.

Traditionally, managers of the electricity grid have relied upon dirty “peaker” power plants – usually fossil fuel-fired and only needed a couple of days a year – to balance the grid during periods of variability or when electricity demand exceeds supply. But, in a world where 50 percent of our energy comes from renewable sources as a means to achieving a clean energy economy, we can’t rely on these dirty peaker plants to balance the variability of wind and solar.

Luckily, technology is available today that can help fill the gap of these peaker plants – and the California Public Utilities Commission (CPUC) is starting to embrace it. Read More »

Posted in Air Quality, California, Cap and Trade, Clean Energy, Climate, Demand Response, Electric Vehicles, Electricity Pricing, Energy Efficiency, Energy-Water Nexus, Grid Modernization, Renewable Energy / Tagged | Read 1 Response

What do the ERCOT Reports Really Say About Texas’ Cleantech Market?

Electric power linesThe Electric Reliability Council of Texas (ERCOT), which manages 90 percent of Texas’ electric grid, has been busy. In the last two months of 2014, the agency released two very lengthy reports examining the future of a lower-polluting power grid in light of upcoming EPA clean air protections, in particular the Clean Power Plan. As the media described it, the reports did not provide the rosiest of outlooks for costs to Texans or electric reliability. But I think they are looking at the reports the wrong way.

The electric grid is changing. Innovative technologies – many of which are created right here in Texas – are lowering electricity bills and increasing energy independence. They are disrupting the way we produce and use electricity and they are changing the way ERCOT looks at grid reliability – albeit not in these two reports.

Cleantech entrepreneurs are at the helm of deciding Texas’ (and, let’s face it, America’s) energy future. And there are quite a few market opportunities outlined in the reports, if you look closely. Here are a few hidden in the report, plus other trends to keep an eye on: Read More »

Posted in Clean Energy, Clean Power Plan, Energy Efficiency, Grid Modernization, Renewable Energy, Texas / Read 3 Responses

Texas Grid Regulator Cites Very Little Burden in Complying with EPA’s Clean Power Plan

Source: Armin Kübelbeck, Wikimedia Commons

Well, it didn’t take long before the Electric Reliability Council of Texas (ERCOT) released, at the request of Texas’ very political Public Utilities Commission, another report about the impacts of the Environmental Protection Agency’s (EPA’s) rules designed to protect public health.

This time ERCOT, which manages 90 percent of Texas’ electric grid, looked at the impact of seven EPA clean air safeguards on the electric grid, including the Cross State Air Pollution Rule (CSAPR), the Mercury Air Toxics Standard (MATS), the Regional Haze program (all of which go back before the Obama administration), the proposed Clean Power Plan, which would set the first-ever national limits on carbon pollution from existing power plants, and others. What was surprising to learn, though, is that after power companies in the state start complying with EPA’s other clean air protections, the proposed Clean Power Plan poses a minimal incremental impact to the power grid. We would only have to cut 200 megawatts of coal-fired generation, which equates to less than one coal-fired power plant. Read More »

Posted in Clean Energy, Clean Power Plan, Climate, Renewable Energy, Texas / Tagged , | Comments are closed

So, how do we Make Sustainability… Sustainable?

alternative-21761_640Last week the New York Times reported that, for the first time in history, clean energy resources like solar and wind are becoming cost competitive with conventional coal in some markets. This paradigm shift, where clean energy is beginning to compete head-to-head with traditional energy sources, calls for a change in perspective.

This ‘change in perspective’ is a movement toward what I would describe as “sustainable sustainability” – in which “sustainable” means the ability to stand the test of time, and “sustainability” refers to an environmentally responsible approach to making, moving, and using energy. In other words, we must find a way to ensure clean energy resources remain competitive in the marketplace and become ‘business as usual’ resources in the overall energy mix. The International Energy Agency (IEA) does a great job of explaining the need for this shift:

In the classical approach, variable renewables are added to an existing system without considering all available options for adapting it as a whole. This approach misses the point. Integration is not simply about adding wind and solar on top of ‘business as usual’. We need to transform the system as a whole to do this cost-effectively.”

Read More »

Posted in Clean Energy, Climate, Demand Response, Energy Efficiency, Renewable Energy, Utility Business Models / Read 3 Responses

ERCOT Report on Clean Power Plan Misses the Big Picture

Source: Dpysh wWe knew this was coming. Everyone knew. The power sector is the single largest source of carbon pollution in the U.S. and one of the largest in the world, yet there are no limits on how much carbon power plants can emit into our air. The U.S. Environmental Protection Agency’s Clean Power Plan (CPP) for new and existing power plants is urgently needed, is well within Texas’ reach, and can ensure that Texas (more so than other states) forges a strong and prosperous clean energy economy.

But this week, the Electric Reliability Council of Texas (ERCOT), which manages roughly 90 percent of Texas’ power grid, issued a report that overestimates the challenges posed by the CPP to the state’s electric grid reliability. Furthermore, it failed to appropriately recognize key tools available to ERCOT and the state to meet the proposed CPP.

Here’s a breakdown of what the report missed: Read More »

Posted in Clean Energy, Clean Power Plan, Energy Efficiency, Grid Modernization, Texas / Tagged | Comments are closed

Disruptive is a Buzzword…but it’s true for Batteries

batteryFor more than 100 years, the U.S. power system relied on fossil-fueled power plants to meet our growing energy demand. Now, clean energy resources like renewables are quickly changing our energy mix. But what happens when the sun isn’t shining or the wind isn’t blowing? What about when power demand momentarily outpaces supply? That’s where batteries and energy storage come in, offering a fundamental, even disruptive change to the U.S. electricity system as we know it.

Batteries are energy game-changers

Today’s electricity system not only overproduces to be prepared for unforeseen problems, it also deploys dirty “peaker” plants that fire up during those few times per year when electricity demand is high (like during a heat wave) and the electric grid is stressed. With batteries, there’s no need for either overproduction or inefficient backup reserves, ultimately saving both utilities and customers money.

Batteries can provide bursts of electricity incredibly fast, often in milliseconds, and with far quicker reaction times than traditional power plants. As a result, energy storage helps the electric grid absorb and regulate power fluctuations, providing electricity fast, when and where it’s needed. Since the supply and demand of power must be carefully balanced, this ability helps prevent the grid from experiencing brownouts or blackouts. Read More »

Posted in Clean Energy, Electric Vehicles, Energy Efficiency, Grid Modernization, Illinois, Renewable Energy / Tagged | Read 1 Response