Unitil Corporation company serves about 100,500 electric customers and 70,000 natural gas customers. Unitil Energy Systems provides regulated electric utility services to 72,600 customers in New Hampshire, and subsidiary Fitchburg Gas and Electric has some 27,900 power and 15,120 natural gas customers in Massachusetts. Unitil's utility units provide retail supply services to customers who don't choose to purchase energy from a third-party marketer. Indirect subsidiary, Usource LLC, provides energy brokerage service to large energy users throughout the Northeast seeking competitive power or natural gas supplies.

Egad, EGAT, that's a lot of juice. The state-owned Electricity Generating Authority of Thailand (EGAT) produces more than 15,000 MW of electricity and buys another 10,600 MW from independent power producers. EGAT not only generates or buys most of the nation's power, it holds a monopoly on transmission to the distributors (Metropolitan Electricity Authority and Provincial Electricity Authority). The utility operates hydroelectric, thermal, and alternative power plants, and provides engineering, maintenance, and other energy-related services. EGAT has also announced plans to expand into telecommunications and natural gas, and to acquire coal mining assets in Indonesia.

Midwesterners can feel the power, thanks to Midwest Independent Transmission System Operator (Midwest ISO), which monitors and coordinates the operation of an electric transmission system with 56,300 miles of transmission lines across 13 Midwestern states and one Canadian province. It manages energy markets with almost $23 billion in annual energy transactions. The Regional Transmission Organization (RTO) ensures fair access to the grid and facilitates communication between its members, which include investor-owned, cooperative, and municipal utilities, as well as power marketers and independent transmission companies. Midwest ISO also provides wholesale electric service across much of the region.

OGE Energy is the holding company for the largest electric utility in Oklahoma, but its largest revenue producer is its energy marketing and natural gas transmission unit, OGE Energy Resources. OGE owns Oklahoma Gas and Electric (OG&E), a public utility with almost 777,000 retail and wholesale customers in Oklahoma (including Oklahoma City) and a bit of western Arkansas. OG&E owns coal- and gas-fired power plants that generate 6,420 MW of capacity. Subsidiary Enogex operates 7,900 miles of natural gas gathering and transportation pipeline. The company also provides physical, asset, financial management services through marketing unit OGE Eenergy Resources.

EDP Renovaveis loves the feel of the wind and the sound of the waves. One of largest wind energy companies in world, EDP Renovaveis has an annual generation capacity of about 5MW. Other power sources include solar thermal and photovoltaic energy, which create electricity from steam and solar radiation conversion, respectively. The company is also developing ocean wave generation capabilities. EDP Renovaveis has wind generation facilities in nearly 10 countries; Spain and the US (through subsidiary Horizon Wind Energy) contribute the greatest part of its wind power generation capacity. The company is the renewable division of fellow Portuguese company EDP Group, the Iberian Peninsula's third largest energy firm.

Integrys Energy Group, Inc., through its subsidiaries, operates as a regulated electric and natural gas utility company in the United States and Canada. It provides natural gas utility services in Chicago, Wisconsin, Michigan, and Minnesota. As of December 31, 2009, Integrys Energy Group, Inc. served approximately 1,669,000 residential, commercial and industrial, transportation, and other customers. It had approximately 22,000 miles of natural gas distribution mains; and approximately 1,010 miles of natural gas transmission mains. The company also generates and distributes electric energy form coal, natural gas, fuel oil, hydroelectric, and wind resources in Wisconsin and Michigan. It served approximately 489,000 residential, commercial and industrial, wholesale, and other customers. In addition, Integrys Energy offers nonregulated energy supply and services; and electric transmission services. Integrys Energy Group, Inc. was formerly known as WPS Resources Corporation and changed its name to Integrys Energy Group, Inc. in February 2007. Integrys Energy Group, Inc. was founded in 1883 and is based in Chicago, Illinois.

Active Power, Inc., together with its subsidiaries, designs, manufactures, and markets critical power quality solutions. It provides various products that deliver continuous clean power, and protects customers from voltage fluctuations, such as surges and sags, and frequency fluctuations, as well as offer temporary power to bridge the gap between a power outage and the restoration of utility power. The company offers CleanSource UPS, a battery free uninterruptible power supply system (UPS) that integrates UPS electronics and flywheel energy storage system into one compact cabinet. Active Power, Inc. also provides CleanSource DC, which is a battery-free replacement option for lead-acid batteries for use in bridging power; CoolAir DC; CoolAir UPS; and GenSTART, which is a battery-free, starting modular system. It offers continuous power systems that comprise UPS system, switchgear, and a generator under the PowerHouse brand name. Active Power, Inc. also provides services, including engineering, installation, start-up, monitoring, and repair for its products. The company serves data centers, manufacturing, technology, broadcast and communications, financial, utilities, healthcare, government, and airport industries. It sells its products through direct sales employees, value added resellers, manufacturers representatives, distributors, strategic IT partners, and original equipment manufacturer partners in the United States, Europe, the Middle East, Africa, the Asia Pacific, and Latin America. The company was founded in 1992 and is headquartered in Austin, Texas.

Kansai Electric Power Company (KEPCO) provides electricity to 13.3 million customers in Japan's Kansai region. The utility has a generating capacity of more than 33,850 MW, which is produced at more than 160 hydroelectric, fossil-fueled, and nuclear power plants. As deregulation takes effect, KEPCO is moving into new business arenas, including retail natural gas sales in Japan. Additionally, KEPCO is engaged in information technology, telecommunications, construction and engineering services, environmental services, home security, real estate, transportation leasing, and other energy-related operations. It has about 50 main affiliated companies, primarily in Japan.

Good night John-Boy. This Walton family serves 118,000 residential, commercial, and industrial customers in northeastern Georgia. The Walton Electric Membership Corporation (Walton EMC) operates more than 6,700 miles of power lines spanning across all or portions of ten counties (Athens-Clarke, Barrow, DeKalb, Greene, Gwinnett, Morgan, Newton, Oconee, Rockdale, and Walton). Subsidiary Walton EMC Natural Gas competes in the state's deregulated retail gas supply market. Other operations include security systems installation and monitoring, appliance sales and rebates, and outdoor lighting services.

Buckeye Power was established by Ohio's rural electric co-ops to produce and transmit electric power for member systems throughout the state. Buckeye Power, which owns two of the three generating units in the at Cardinal Generating Station, contracts with other Ohio electric companies to use their transmission systems to transmit power to its member electric distribution cooperatives.It has cost a few bucks to generate power, but the effort has been well worth it for Buckeye Power, an electricity generation and transmission cooperative that provides electricity to 24 distribution companies in Ohio and one in Michigan. Together they serve more than 390,000 homes and businesses in 77 of Ohio's 88 counties

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