Stories tagged with "electricity"

Will Residential Power Systems Disrupt the Grid?

This is a guest post by Steve Piper. Steve has a M. S. in Public Management and has been a consultant in the utilities business (primarily electricity) for the last 20 years.

A couple of months ago, posters on The Oil Drum raised the question of whether installing large amounts of grid-connected power at the residential level (solar panels, small wind turbines, and the like) would disrupt the grid.

There is a standard (IEEE 1547) covering safe interconnection of small power facilities to the grid. Comparing the amount of increase likely in solar panels and in residential wind turbines with the allowances for disruptions of various types in standard IEEE 1547, it appears that the adding these devices should not be unduly disruptive. The only exception might be in areas with unusually high grid penetrations of these auxiliary devices.

Some Cautionary Thoughts about Wind

This story has been edited to make it clearer that the analysis relates to US wind rather than European wind and to clarify the problem with excess generation at night. I also added an Item 10.

I think we think we know more about wind-power than we do. These are a few things that I have recently discovered about wind that make me think that plunging headlong into electricity is not necessarily a good idea. At this point, we don't seem to have a plan that does much more than address wind turbines themselves.

I should make it clear that this discussion relates to US wind power, not European wind power. Many of the issues directly or indirectly relate to the fact the US is facing a multi-faceted problem--lack of wind turbines, needed grid upgrades, and lack of electrical storage. In a time of financial problems, the price of such a big change makes it difficult to tackle all these problems on the necessary scale at once. If we only add wind turbines, and make minimal upgrades in storage and transmission, the change is still likely to still be expensive and will likely leave us with the need for large subsidies. Without extensive grid upgrades and electrical storage changes, wind generated electricity will continue to play only a supporting role, acting mostly as a fuel substitute.

Europe has been dealing with this issue longer and has better addressed the wind transmission and storage issue, so it is in better shape in this regard. Jerome Guillet has prepared a write-up focusing more on the European perspective.

Electricity - No Easy Answers

Electricity is something we are coming to depend more and more on as liquid fuels become less certain. At the same time, big changes are planned for electricity, both in terms of fuel mix and in terms carbon treatment. In this post, I show a few graphs relating to US Electricity, and offer some comments on how what I see relates to the challenges at hand.


Figure 1

This graph shows that US electricity generation has been growing fairly steadily since 1970, unlike petroleum use. To the extent there was change from the long-term trend, it was between 1981 and 1990, when production from natural gas was lower due to a change in regulation. The other dip was in 2008, when net generation is down about 1%.

Some Thoughts on the Obama Energy Agenda from the Perspective of Net Energy

The Obama-Biden comprehensive a New Energy for America Plan is designed to:

  1. Help create five million new jobs by strategically investing $150 billion over the next ten years to catalyze private efforts to build a clean energy future.
  2. Within 10 years save more oil than we currently import from the Middle East and Venezuela combined.
  3. Put 1 million Plug-In Hybrid cars -- cars that can get up to 150 miles per gallon -- on the road by 2015, cars that we will work to make sure are built here in America.
  4. Ensure 10 percent of our electricity comes from renewable sources by 2012, and 25 percent by 2025.
  5. Implement an economy-wide cap-and-trade program to reduce greenhouse gas emissions 80 percent by 2050

The Obama energy agenda focuses on - and these are not mutually exclusive - efficiency, electrification, and the promotion of alternative energy resources. Its five main goals are set up in a way so that success in any one of the five individual areas will reinforce the other 4, helping the overall agenda achieve success. For example, creating 25% of the U.S. electricity production from renewable resources (goal #4) will aid in decreasing the U.S. greenhouse gas emissions by 80% (goal #5).

The energy agenda is a welcomed change showing a future outlook that is based, at least to some [small] extent, on the physical realities of the natural resource world. However, from the perspective of net energy, some potential problems do exist. My goal here is to discuss some possible shortcomings of the new administrations energy agenda from the perspective of net energy.

Electrical Supply: Time, Scale, and the Need for Decision in Planning Future Power Plants

As the first gentle snowflakes of winter settled on the windscreen of my car I was reminded, yet again, of the turning of the seasons and our need for power to keep us warm through the coming months. Last week I commented on how jobs might be created as the pattern of power supply begins to change, particularly with the incentives that might be a part of a new initiative. Two factors often get understated, however, in the current anticipation of the changes that a new Administration may bring. The first of these is the time that it will take to get any decision implemented at a scale that can be meaningful, and the second is the scale itself of the problem that now faces us.

The Immediate Fuel Supply - Thoughts for a New Administration

One of the considerable differences between the ongoing financial problems of the world, and the coming energy crisis lies in the nature of the commodity of concern. In the first case the problem focuses around money, though not really the physical and tangible cash that one uses less and less to pay for groceries, the rent, or the occasional book. The US has already transitioned to a point that more than half the time we use credit and debit cards to pay the bill. (The quote is from a year ago)

As debit card and credit card purchases become increasingly popular, check and cash payments continue to lose out. These traditional payment methods now account for less than half of all transactions, and a recent rule change by the Federal Reserve Board should tilt the balance even further away from paper transactions and toward plastic payments.

As a result, for the vast majority of us who do not keep our money in the mattress, financial solvency and insolvency is defined by electronic statements about the nature of our accounts, without there being a pile of gold sitting in the bank to define it. And, when the banks and other companies holding such accounts get into trouble, loans can and have been arranged for them, that are similarly electronic transactions, without large trucks pulling up at either Fort Knox, where 147.3 million ounces currently sit, or to the Federal Reserve Bank in New York, that holds about 216 million ounces. Rather the transactions occur electronically, and there is relatively little need for the physical presence of the cash.

Contrast that with the realities of an energy crisis. We cannot heat our homes with the promises of oil, or the electronic transfer of ownership of fragments of a tanker load making its way from Ras Tanura to the Gulf ports. We need the physical presence of the oil, natural gas or wood that we will consume. When we run out, we need to get some more.

Wind and Heat Pumps: A Winning Combination

The following is a guest post by Tom Konrad, PhD. Tom is an investment blogger who brings readers ideas for investments that may benefit from Peak Oil and Climate Change at AltEnergyStocks.com, where this article is cross published.

Last month, I posted some nice maps showing when and where good wind resources are found in the US. Now I've found something better: a visual comparison of electrical load with wind farm production[pdf file], published by the Western Area Power Administration in 2006. The study compared electricity production from five wind farms in Northern Colorado, Southwestern Nebraska, and Central Wyoming in 2004, 2005, and the start of 2006, compared with electricity consumption in the same area over the same time period.

UK Energy Flow Chart 2007

Every few years the UK Department of Trade and Industry, now Department of Business Enterprise & Regulatory Reform, publish a chart of the nation's energy flows. Here's the most recently published chart based on 2007 data:


Click for .pdf

It's a nice, high level overview of energy in the UK illustrating the flow of primary fuels from the point at which they become available from home production or imports (on the left) to their eventual final uses (on the right). Flows at the bottom represent exports, conversion losses and energy industry and non-energy use. The yellow blocks represent transformation (power stations and refineries).

The Path from Petroleum Shortages to Electricity Shortages

It seems to me that there is likely to be a very short path from petroleum shortages to electricity shortages. There are a lot of issues involved, from the fact that the fuels used in electricity production are themselves dependent on petroleum for their extraction and transportation, to the current state of the US electricity infrastructure, to the impact of peak oil on debt financing. I have written about most of these issues before, but since the petroleum/electricity link is such an important one, I thought I would devote an article to putting the pieces together.

Fuels used for electricity generation

In the United States, the primary fuel used for electricity generation is coal, at 49% of electricity production. Natural gas follows at 22%; nuclear at 19%; hydroelectric at 6%, and petroleum at 1.6%. The newer renewables are all quite small: wood at 0.93%; wind at .77%; waste at .41%; and solar (for electricity generation) at 0.01%.

Percentage distribution of fuels used in US electricity generation

Figure 1. Distribution of fuel supplies used in US electricity generation, based on EIA data.

Peak Oil and the Financial Markets: A Forecast for 2008--July 31 Update

Back in January, I made a financial forecast for 2008. In this post, I will update my analysis, looking both at what has happened thus far in 2008, and refining what is likely ahead.

Most forecasts are made with an overriding assumption of infinite growth, but the analysis made in January and updated now maintains an underlying assumption of resource limitations, such as will likely accompany the advent of peak oil. Under resource limitations, debtors are likely to find it difficult to pay back loans, as resources become more and more scarce. As a result, default rates are likely to continue to rise.

One of the issues I consider important in my forecast is systemic risk. This relates to the interconnectedness of the system, and predicts that if one part fails, other parts are also likely to fail. Many other articles mention this issue, but rarely address its full ramifications.


Figure 1. An example of a system with systemic risk (Photo from homebuyerphoenix.com)