Alterra Power Corp. said it has entered into an agreement to acquire a portfolio of wind development assets at four sites in coastal British Columbia from a group of sellers led by English Bay Energy Limited.

Wisconsin Power and Light Co., a subsidiary of Alliant Energy Corp., said it exercised its option to purchase Riverside Energy Center LLC, which owns the Riverside Energy Center, from Calpine Corp. for $392 million.

ABB has completed the acquisition of Thomas & Betts, a Tennessee-based provider of low-voltage products.

URS Corp. completed its acquisition of Flint Energy Services Ltd. for $1.24 billion.

Canadian-based uranium producer Cameco said it has signed an agreement with Advent International to purchase NUKEM Energy GmbH (NUKEM), a trader and broker of nuclear fuel products and services.

Sauer Energy Inc., a developer of the patented WindCharger vertical-axis wind turbine, purchased 100 percent of the assets of Helix Wind Corp., a manufacturer of small vertical axis wind turbine systems, on May 11.

Westinghouse Solar Inc., a designer and manufacturer of integrated rooftop solar power systems, and CBD Energy Ltd., a diversified renewable energy company, signed a definitive merger agreement.

Duke Energy and Progress Energy have entered into a supplemental merger settlement agreement with the North Carolina Utilities Commission (NCUC) Public Staff.

Emerson announced that it has acquired ISE Magtech.

AES Corp. will sell 2,727 MW of coal-fired capacity in China for $134 million because it is unable to pass on higher coal costs to customers.

HDR Inc. has acquired Stetson Engineering Inc., a Wyoming-based firm with offices in Gillette and Riverton.

Shareholders with Thomas & Betts Corp., a North American manufacturer of electrical and utility products, voted to approve a merger agreement with ABB for $72 per share.

Duke Energy Renewables has acquired a 10 MW utility-scale solar project near Kingman, Ariz., from Solon Corp.

Kistler, a supplier of precision sensors, systems and instrumentation for the dynamic measurement of pressure, force, torque and acceleration, has introduced the USB-based Type 2825A DynoWare universal data acquisition and analysis software, designed for direct compatibility with Kistler stationary and rotary measuring systems, including single- and multi-component dynamometers and other force sensors.

AZZ Inc., a manufacturer of electrical products and a provider of galvanizing services, said it has entered into an agreement to acquire substantially all of the assets of Nuclear Logistics Inc., a provider of electrical and mechanical equipment and services for enhancing the safety of nuclear facilities.

Duke Energy Renewables and Sumitomo Corp. of America, the U.S. subsidiary of Sumitomo Corp., finalized their 50-50 ownership arrangement for two wind farms in Kansas and secured $353 million in financing for construction and operating costs.

Globeleq Generation Limited, a markets power company, announced the acquisition of the 44 MW Eolo wind project in Nicaragua through it’s majority-owned subsidiary, Globeleq Mesoamerica Energy (Wind) Limited.

The Arizona Corporation Commission approved Arizona Public Service Co’s purchase of Southern California Edison’s majority ownership share of units 4 and 5 at a coal-fired power plant in New Mexico.

PPL Corp. on April 13 completed the acquisition of AES Ironwood LLC and AES Prescott LLC, which together own and operate the 705 MW AES Ironwood combined-cycle natural gas-fired power plant in Lebanon, Pa.