The Electric Salon Blog - Discussions and Information on the Smart Grid

World trade and Carbon

2010-03-26T11:51:00.001-07:00

Carbon is a big motivator for the smart grid, and global standards could be beneficial. Here is an interesting article by a writer for the WTO.

http://www.wto.org/english/news_e/news10_e/envir_26mar10_e.htm

Transmission, high temperature super conductors

2010-03-12T14:29:00.000-08:00

Part of our current transmission system is that we have to use alternating current (AC) for long distance transmission. The reason for this is that volts push the current, sort of like water pressure, and the pressure needs to be high to push it for long distances. By high, I mean hundreds of thousands of volts. To do this a device called a "transformer" increases the voltage from the generation source. Then, when it arrives at its destination, another transformer lowers to voltage so it can be used in a home or business. Transformers overheat with direct current, so AC is necessary.

To understand AC, think about putting a battery into a flashlight. One end is labeled "+," for "positive" and the other "-," for negative. The electrons (current) flow from one side to the other in a stream. This is "direct current" (DC), it flows only one way. With alternating current, it is if the poles switch rapidly (in the US 60 times a second, in Europe, 50 times a second) so the direction of the current flow reverses rapidly.
DC is just fine for almost any purpose, and in fact, the AC has to be converted to DC o be used. Those bricks that plug into a wall socket and charge your phone convert AC to DC

One of the things that makes it difficult to use DC for long distances is that when the current goes through the wires it meets "resistance." The electrons bump into things and lose their energy as heat. A good example of this where it is done on purpose is an electric heater and you have probably noticed that the power supply on your laptop can get warm as well. Usually, this heat is wasted. Your laptop may help keep your house warm on a cold day, but it just gets lost going through wires outside. If there were no resistance, not only would there be no heat, but there would be no need to increase the voltage or use AC. That is because the resistance needs to be overcome by pushing the current harder, sort of like pushing a car with the brake on.

There is some good news and bad news about resistance. The good news is that there are materials with no resistance, the bad news is that the first one discovered, liquid helium, boils at -270°. It takes a lot of energy to get things that cold. Fortunately, there is more good news: now there are materials that offer no resistance at a balmy -196°, the temperature of liquid nitrogen. Even though that is colder than Lake Woebegon in January, it does not take nearly as much energy to cool to that temperature as to that of liquid helium. In fact, it requires significantly less energy that the energy lost by changing the DC to AC, transforming it to high voltages and heating up the power lines. This study by EPRI talks about the plausibility of doing this, and the verdict is good:

EPRI Shows That Direct Current Superconductor Cable is Feasible for Development Using Today’s Technology

Solar as a regressive tax

2010-03-09T00:10:00.000-08:00

This well documented blog entry argues that solar on homes in some cases is a "fashion accessory" and that feed in tariffs are regressive taxes that affect the poor. The article is from England, but it discusses in detail the feed in tariffs in Germany, which are often used as a model for the US. They support the PV industry, but do not provide power of any significance nor do they reduce carbon.
A Great Green Ripoff

Great article in Smart Grid News on Consumer Resistance

2010-02-10T09:52:00.000-08:00

If you have not signed up for "Smart Grid News," I recommend it
http://www.smartgridnews.com/artman/publish/Business_Planning_News/Blowback-Attack-The-Smart-Grid-s-Greatest-Danger-1875.html

McKinsey: Green jobs have little direct effect on unemployment

2010-02-10T09:37:00.000-08:00

The report I got from McKinsey this morning had this interesting snippet:

There is a lot of talk these days about green businesses, biotechnology, and other emerging industries that will create the jobs of the future. While they are obviously part of the solution, these industries are too small to create the millions of jobs that are needed right away. The semiconductor and biotech industries, for instance, each employ less than one-half of 1 percent of US workers; clean-technology workers, such as those who design and make wind turbines and solar panels, account for 0.6 percent of the workforce.
We’ll be able to generate significant numbers of new jobs only by spurring broad-based job growth across the economy, particularly in big sectors such as retail, wholesale, business services, and health care. High-tech innovations will help employment grow over the long term, as new technology spreads throughout the economy and transforms other, larger sectors. For example, while the semiconductor industry alone doesn’t account for much US employment, the computer revolution has fueled the growth of other industries such as retail and finance; similarly, the clean-technology business by itself doesn’t employ many people, but its developments could transform a big sector such as energy, creating new business models and new jobs.

Smart Grid Might Save 12% of Carbon Emissions

2010-02-01T12:46:00.000-08:00

Though the percentage of Americans that believe in man made climate change is declining, the overwhelming scientific consensus is that it is. A hot button item in the current political climate is cap and trade, seen by some as a new tax that will crush our economy. It might not politically viable to sell the smart grid's environmental impact. This paper, The Smart Grid: An Estimate of the Energy and CO2 Benefits, gives an overview of both Energy and environmental benefits,

One point that I noticed was:

... renewables themselves are not generally envisioned as a controllable smart grid asset.1
The carbon-free energy they supply is critical to achieving the nation’s carbon-management goals,
however. One of the functions of a smart grid is the ability to manage the assets under its control to help
integrate renewables, such as mitigating the need for additional costly ancillary services to manage their
intermittency, and reducing costs for improved voltage control schemes and short-circuit protection. (2.4)

It is worthwhile to look at the EPRI Prism Study to see that they predict only 15% of energy can come from renewables. Could isolated generation work or has the demand for electricity exceeded the ability of local generation facilities?

A definition of the Smart Grid

2010-02-01T11:36:00.000-08:00

“The smart grid isn’t a thing but rather a vision… It must be more reliable...more secure...more economic…more efficient…more environmentally friendly…(and) It must be safer. A “smart grid” can be (characterized as) a “transactive” agent…(that) will:
 Enable active participation by consumers…
 Accommodate all generation and storage options...
 Enable new products, services, and markets…
 Provide power quality for the digital economy...
 Optimize asset utilization and operate efficiently…
 Anticipate and respond to system disturbances (self-heal).
 Operate resiliently against attack and natural disaster.

Achieving the vision is dependent upon participant circumstances and involves:
 Empowering consumers by giving them the information and education they need to effectively
      utilize the new options provided by the smart grid…
 Improved reliability and “self-healing” of the distribution system…
 Integration of the transmission and distribution systems to enable improved overall grid operations
      and reduced transmission congestion…
 Integration of the grid intelligence acquired to achieving with new and existing asset management
      applications…

    Source: Smart Grid News, April 22, 2009. What is the smart grid?

China and Energy

2010-01-30T13:05:00.000-08:00

China Leading Race to Make Clean Energy

This might be, on the face of it, alarming. However, this is focusing on the generation portion of the Smart Grid. This article: "The Smart Grid in 2010 - Market Segments, Applications and Industry Players" from Greentech Media (perhaps the best source of information on the Smart Grid) gives and extensive breakdown of the types of businesses that will be involved in the Smart Grid. I draw your attention to Figure #3 on page that has their idea of the rollout of the Smart Grid. A significant portion of it is IT an area where the US still holds a substantial lead. Another area the US has a huge amount of experience is in system integration. An important aspect of making this work is the development of common standards between the US and China. This will be a major topic of future Electric Salons involving several of our partners including Silicon Valley China Wireless Association and David Gardiner and Associates, LLC.

Observations on Granovetter's talk

2010-01-30T11:54:00.000-08:00

After the talk several people approached me and pointed out: "it is all well and good to know how we got here, but now that we are here, how do we change?' Of course generation is an issue, but consumption is an issue as well. An other question is: "given today's consumption, can isolated generation provide for our power needs?'

There are a number of things to consider. One is the type of generation. It seems conceivable that natural gas, petroleum or even coal might be used to create small power plants, but greenhouse gases and the transportation of the fuel would still be an issue. Granovetter argues that because the transmission was more technically interesting engineers focused on it to the exclusion of solving such problems.

It is important to begin investing in the future today. Rephrasing the question above, we might ask "if we start now, will isolated generation be able to provide for our power needs in 20 years?" At this point I doubt it. This will be a topic of future Electric Salons.

I encourage your comments on the subject.

The Electric Salon January 26, 2010 - Mark Granovetter

2010-01-30T00:15:00.000-08:00

Electric Salon on January 26, 2010

Publish Post

Is the future of the Smart Grid the Past?

The January 26th 2010 meeting of the Electric Salon featured Mark Granovetter. Granovetter has done extensive research on the formation of the electric power industry. One of his main points was the evolution of the industry into centralized generation as opposed to isolated generation. Centralized generation is generation that takes place in a central facility and is distributed by transmission lines to the users (loads). Isolated generation is where the generation is local. This question will be a theme of the Electric Salon.

The meeting was opened by Don Steiny, he described Smart Grid as like six blind men describing an elephant. Some think SG is solar, some think sensors, some meters etc

SG is different from usual Silicon Valley project in that capital requirements are huge. In the Valley we think a 1 billion project is big, but in the power industry, 1 plant can cost a billion.

In addition, the power industry is highly regulated which can make it very difficult. The Electric Salon is a place to bring people together that see different parts of the elephant so we can get the whole picture.

Mysteries of Silicon Valley:

What is the Smart Grid and what makes it so smart?

To understand this second mystery we need to look at the history of the electrical power industry from the 1870s to the 1920s, when power industry took its modern form. We tend to think that the technology that becomes dominant does so due to the advantages of that technology. In terms of the electrical power industry, this tends not to be the case.

Lets look at Thomas Edison, a young man who came out of nowhere. He was just some guy with lots of technology in his background who was bad at finance. He was bumming around trying his hand a various trades, one of which was telegraphy. He was an expert and he happened to get a job in the New York Stock Exchange. He got a reputation as a problem solver because he was the guy who could fix the machines. This is how he got to know JP Morgan, who provided financial backing for Edison at first.

It is interesting to note that Edison did not invent the light bulb. It was invented by Swan. Edison just made lots of experiments and he built a better bulb. However, Edison was always more interested in systems then in individual devices.

The electrical industry took the shape it has today through a series of choices between alternatives.

The first choice concerned the distribution system for electrical power; the choice was between the alternatives of a central generation/distribution model and a isolated/local generation/distribution model. As it happened, Edison favored the central distribution model, even though it turns out in many cases that local distribution is more efficient. JP Morgan favored local distribution (he felt it would be more lucrative). Oddly, Edison also favored direct current over alternating current, even though direct current is not as effective in transmitting power over the long distances required by the central distribution system.

In order to appreciate the second set of alternatives, it is useful to look a the model of the telephone system. When this system developed, the same company provided the telephone equipment and the telephone service; Bell provided the service and its subsidiary, Western Electric provided the equipment. A company that provided both the equipment and the service is one alternative. The other alternative is for one company to provide the service and another company or companies to provide the equipment. This later alternative was the one taken by the electrical power industry.

A third set of alternatives in the electrical power industry was between smart meters (which were invented in the 1890s and which were more efficient because allowed the company to charge more for power in peak load times and tended to level loads), vs constant meters. Smart meters were rejected because the constant meters were more profitable.

A fourth set of alternatives for the power industry was the choice of distributing ac or dc. As I mentioned Edison favored dc, which did not fit with his preference for central distribution, since it is harder to transmit dc over long distances. One reason for this preference was that Edison’s rival Westinghouse favored ac power. An interesting story which illustrates how much Edison disliked Westinghouse and ac power concerns capitol punishment in New Youk. Edison persuaded the NY authorities to use ac power in their electric chair to electrocute prisoners. Edison then noted that “AC power is deadly”.

Prior to the 1920s the power industry developed with local distribution which was more efficient and cost effective. Despite these advantages, the central distribution came to dominate the power industry, not because it was better, but because individuals (such as Edison) used their financial, technical and political resources to push the industry in the direction of central distribution. Further, while both central distribution and local distribution presented engineering problems, the problems presented by local distribution were ordinary and uninteresting. The problems presented by central distribution were more challenging and engineers were more interested in solving them. As a result the problems presented by central distribution were solved earlier. Central distribution came to dominate the power industry the forces in its favor were more politically powerful that the forces favoring local distribution.

This was the case even though central distribution has big liabilities. For example the widespread disruption that occurs when there is a big blackout would not happen with local distribution.

The same analysis applies to why we do not jave smart meters. Smart meters were initally developed in 1890s but, even thought they were more efficient and allowed electric loads be leveled, they were rejected by the power industry felt the alternative meters produced greater profits.

The shape of the current power industry was not shaped so much by the techical aspects of generating and distributing power as by individuals mobilizing financial, technical and political resources through their social and professional networks.

Moral: If you want to anticipate the future shape of the power industry and the smart grid in 20 years, do not just look at the technical problems and the proposed solutions. Instead look at who is advocating which technology, how they are organized, and what their financial and political resources are.

Question: Why revisit this now?

Answer: Book by Hersh. Choices creating issues physical limitations of grid complexity

Difficulty of management

Pollution

Question: Given the presence of the past, what will happen in the future?

Answer: Must study-all depends on social contingencies-who-social organizations-finance

For example Shockly and Silicon Valley. He invented transistor, moved here and attracted some of smartest people here to work for him. He could have had a company that dominated the valley. But he was a jerk to work for and many of the smart people he attracted here could not stand him and left to start their own companies.

Question: Why did power system not develop like Bell telephone system?

Answer: Two reasons: First, bell system provided both telephone service and telephone equipment. Power industry distribution and equipment provided by different companies.

Second: It made sense for bell system to be regulated nationally, since it needed to be nationwide to work. The power industry worked to be regulated on a state basis or municipal bais , since it was easier of the industry to manipulate and control state and municipal regulators than it would be federal regulators.

How the power grid works

2010-01-20T13:13:00.000-08:00

I found this excellent primer on the power grid: http://science.howstuffworks.com/power12.htm

Stanford Smart Grid Series - Efrin Ibraham

2010-01-19T10:10:00.000-08:00

Last Wednesday I went to the first in a series on the Smart Grid. It was an overview by Efirn Ibraham from EPRI (Electric Power Research Institute). He is a compelling and accomplished speaker and EPRI has some of the best available data. Among other things he recommended looking at NIST Smart Grid Interoperability Roadmap. This paper provides a roadmap of the development of standards so that there won't be many little grids, but one Smart Grid where energy can flow to where it is most needed.

There are several points Ibraham makes whenever I see him that are somewhat surprising. The best way to see the point of view of EPRI is to look at the document EPRI Prism Analysis. This shows a proposed mix of energy sources that can meet carbon reduction goals and provide enough energy. Note that renewables are only 15% of the mix. The economics of solar puzzle me because solar panels are currently too expensive for most people to afford, yet they are subsidized by governments and utilities companies. The consequence is that our taxes subsidize something most of us do not benefit from. Thought it may be argued that the use of more renewables benefits us all, subsidizing the wealthy may not be the best path. I am agnostic about this, but it is intriguing.

What do the utility companies get out of it? Ibraham recommended a paper, The Power of Five Percent, which show that the marginal cost of the last 5% of power is huge so reduction in peak demand makes huge returns for the power companies.

Finally, I want to recommend that you look at this organization The Gridwise Alliance for some ideas of what is being pushed.

It is rare that even a simple project will go completely as planned. The Smart Grid is an ill-defined scheme by hundreds of countries and many thousands of businesses so anything we hear now needs to be taken with several grains of salt. That is why I am bringing together people with different views so we can use our own intuition to make better guesses. Please come and contributed to The Electric Salon