Micropower resources “provide ways to reduce carbon emissions, improve energy efficiency, and ease the strain on stressed grids by providing supplemental power during periods of peak use.”
In “Anatomy of a Distributed Grid” Enviropundit notes when micro power production is local “there would be no need for electricity to be produced at higher voltages, resulting in no step-down losses and low line loses.” Facilities close enough to the end users “would be linked together in a circle so that areas of high demand and high production balance out.” She characterizes the concept of a distributed grid as a decentralized network of facilities that generate electric power “from a few hundred kilowatts to roughly fifty megawatts.”
Some examples of micro power generation include:
- Biomass (i.e., microturbines)
- Cogeneration, a.k.a., Combined Heat and Power, to include Micro CHP
- Hydrogen (i.e., fuel cells, H2ICE)
- Solar
- Water
- Wave
- Wind
This is more than a few off-grid granola-munchers. Cogeneration systems in the commercial and industrial sectors already are producing 135 billion kilowatt-hours for their own use, which amounts to approximately 3.6 percent of U.S. generation. Participating in such future distributed generation could be farms using biogas powered generators, solar photovoltaic systems on residential rooftops, and combined heat and power (CHP) systems (also known as cogeneration) in industrial plants and on university campuses. In fact, a Congressional Budget Office document, “Prospects for Distributed Electricity Generation” (September 2003) notes that micropower could pose a possible conflict between local utility companies and organizations that are retail utility customers and have acquired generators to become producers of electricity. Michael Giberson notes that Federal Energy Regulatory Commission has proposed revisions to those regulations that govern what is a “Qualifying Facility?€?. Qualifying facilities “are small renewable energy generators or cogeneration facilities that, under the Public Utility Regulatory Policies Act of 1978, gained the right to sell power to public utilities.”
In an earlier article about Smart Energy Grids, Alex Steffen comments after reading a discourse by Pat Mazza on “smart energy”:
This all rocks pretty hard, but it gets downright seismic when you start to consider the implications for the developing world, where there is often no grid worth speaking of to replace. There, if we can get the price down enough, distributed energy and smart grids could do for power what cellphones have done for communications – leapfrog entire regions right over the 20th Century and into the 21st.
Micropower and micro CHP can raise the quality of life in developing countries without relying on huge power plants or expensive, difficult-to-obtain fossil fuels. Micropower technologies are enabling those historically left in the dark to leapfrog the hub-and-spoke grids altogether. There is a growing global market to supply products to micro power generators. States Steve Silberman in a July 2001 Wired article, “The EnergyWeb“:
Green resources such as photovoltaic arrays and wind turbines fall into the micropower category, as do reciprocating engines, fuel cells, Stirling engines, and gas-fired microturbines. Micropower is surging in world markets, both in industrialized countries and in regions with no electricity, where distributed generation offers rural communities and local entrepreneurs access to power without waiting for the costly grid extensions promised long ago by national utilities.
In his comprehensive white paper, “Micropower: The Next Electrical Era“, Seth Dunn offers a roster of thriving solar and wind power markets. And, in a recent World Changing article, Joel Makower, notes that his company, Clean Edge, published a report, “Clean Energy Trends 2003“, that suggested “optimizing the grid” would attract investment and further innovation.




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[...] As recently noted, wind power is a component of distributed generation and with concerns about oil supplies there is greater emphasis on micro generation that uses renewable energey resources. For instance, USDA Rural Development grant assistance for renewable energy and energy efficiency projects in 32 States amounts to almost $21 million. Other federal policy includes a production tax credit for the construction of new wind farms, which can be brought on line within one to two years, a very appealing feature when other generator construction can have much longer lead times. Wind power will be critical to the federal governement meeting a goal set by the Energy Policy Act of 2005 that requires the government to obtain 7.5 percent of its electrical power from renewable sources of energy by 2013. And, such development is critical to energy security. By the end of the year when additional wind power generation comes on line, it will alleviate the need for power generation with natural gas by four to five percent. [...]
[...] The article reported that TMA “plans to sell turbines generating from 500 watts to 1 megawatt. The smaller ones are portable and can be used by farmers, the military and remote cabin owners.” Thus, the TMA VAWTs are another example of micro power generation. The promotional article mentioned nothing about how the mechanical design accommodates pulsating torque problems experienced by other VAWTs, nor was there any mention of the type of power electronics utilized. [...]
[...] Since there has been mention of latter two areas previously, let us focus on the first area. While GCC fails to elaborate on the description, I would assume that it is reference to micro power generation. In other words, a manufacturer has a physical plant producing a certain amount of power. If the amount of power is insufficient for a certain operating level, then the company beomes a customer of a utlility company for the additional power. Since the timing often corresponds to times of peak load, the cost of the electricity is greater. Thus, a physical plant could want a more cost-effective power source that is quickly and safely responsive to the increased internal demand. [...]
[...] One component of better reserve could be banks of Maxwell Ultracapcitors that could provide a quick, albeit brief, power reserve. Thus, when the wind power generating a level of direct current that is too low, a controller could channel the energy into battery storage. When the level is just right, and good engineering would maximize this operating range, DC would go to an inverter; out would come AC to be used for internal power needs or sold for local distribution. When there is an excess amount of DC, the controller could channel the excess into capacitance. [...]
[...] I previously mentioned several types of energy storage that could be incorporated into micro power generation including batteries, super capacitors, and hydrogen. [...]