Virginia Power signed contracts last week with two more small power producers, continuing its strategy of encouraging other companies to build power plants to meet an expected increase in the demand for electricity in the 1990s.

Under one of the two agreements signed last week, Ogden Martin Systems of Fairfax Inc. will build a plant at the Lorton landfill to produce 60 megawatts of electricity from a waste-to-energy facility. Under the second, Nortex Management Inc. of Houston will provide about 73 megawatts from a unit that will burn coal waste. That unit will be located near Virginia Power's Mount Storm Power Station in West Virginia.

So far, the company has signed contracts with six independent power producers. But Virginia Power says it must also be allowed to build its own 200-megawatt plant at Chesterfield, Va., just in case the projects don't get built. The utility's position has ignited a fight among Virginia Power, small producers and the Virginia State Corporation Commission. The plan's opponents say there is enough independent power to cancel the plant.

"These contracts -- all of which meet our key terms for protecting our customers' interests -- underscore our intent to rely heavily on cogeneration for meeting our new power needs in 1990 and beyond," said James T. Rhodes, senior vice president of power operations.

Richard Gozikowski, director of the office of waste management for Fairfax County, said a permit to burn solid waste from the Lorton landfill has been issued by the State Air Pollution Control Board, but the waste-to-energy project must still be approved by the Board of Supervisors.

"We're still in negotiations with {Ogden} to design, construct and operate a facility," he said. "We've been working on this idea since the early 1980s ... . We feel it's an environmentally sound method of solid waste disposal. Land is rapidly diminishing, and it's costly" to find new waste sites, he said.

The landfill is the primary source of disposal for Fairfax and takes waste from the District of Columbia, Arlington and Alexandria. The county will pay the small power producer to burn 3,000 tons of solid waste a day. The Fairfax economic development authority will issue bonds for Ogden Martin Systems, and Ogden Martin will build and operate the facility and pay off the bonds.

Ogden Martin Systems is owned by Ogden Corp., a $1 billion company based in New Jersey that provides services from building cleaning to aircraft refueling. Company spokesman Lewis Ward said his division has negotiated power agreements with 10 different utilities across the country. The division is finishing up the construction of a municipal waste-burning unit in Alexandria that will provide Virginia Power with 20 megawatts of electricity.

BellSouth Enterprises Inc. last week agreed to buy the operations of Universal Communications Systems Inc. of Roanoke, a supplier of telephone equipment to businesses, which currently is mostly owned by Prime Motor Inns Inc.

BellSouth Enterprises Inc. is a subsidiary of BellSouth Corp., the regional phone company based in Atlanta. Fred Shaftman, president and chief executive officer of UCS, said BellSouth "intends to continue the operations of UCS under the UCS name and under its present management."

BellSouth will pay $80 million -- $20 million of it in cash -- for UCS. The transaction requires ratification by shareholders, but Prime Motor Inns owns 84 percent of the stock and has endorsed the sale.

Dyncorp, formerly Dynalectron Corp., has been awarded a $56.8 million contract to provide technical and engineering support at the Naval Air Test Center at Patuxent River.

Dyncorp is a diversified technological services company with 15,000 employes. It is based in McLean.

The contract, with options for four years, starts this September. Dyncorp began providing services to the Naval Air Test Center in 1978 with 14 employes. It now employs 250 people there. Under the new contract, that number is expected to increase to 450 by 1991.

The contract calls for Dyncorp to provide optical and electronic tracking devices, data collection, reduction and analysis services and computer services to the Navy.

The National Aeronautics and Space Administration last week awarded Planning Research Corp. of McLean a $61 million contract to manage a "software factory" for the NASA space station. All flight program software to be used by the space station will be written at the facility in Houston, said Mark Hughes, senior vice president and general manager of the Defense Systems Division of the company's Government Information Systems Unit.

The concept of a software factory is relatively new, according to Hughes. In the past, programming has been done on a piece-by-piece basis. At the Houston facility, PRC will set up a systematic procedure to handle the entire programming process. "It's a bit like the difference between building cars on an assembly line rather than one at a time," Hughes said.

The Federal Systems Group of TRW Inc. has been contracted by the National Weather Service to help upgrade its weather forecasting, observing and warning capability throughout the United States. The one-year contract, with four option years, has a potential value of $15 million.

The contract calls for TRW to provide systems engineering and technical support services as the agency undertakes a massive automation program that will lead to more accurate weather forecasting. The Federal Systems Group also received a $3.1 million research and development contract from the U.S. Air Force to develop prototype application software known as RAMCAD.

TRW, teamed with Virginia Polytechnic Institute and State University, will develop software capable of integrating commercially available "reliablity, maintainability and supportability" software with computer-aided design software.

The National Aeronautics and Space Administration (NASA) has given the Bendix Field Engineering Corp., a technical services unit of Allied-Signal Inc., a $384 million contract for services at Goddard Space Flight Center in Greenbelt.

Under the contract, Bendix will provide support services to several divisions at Goddard Space Flight Center, including systems testing, maintainence, training and mission support analysis.

Verdix Corp., a computer systems and software development company in Chantilly, has signed an agreement with Tektronix Inc. to distribute the Verdix Ada Development System as part of the Tektronix Ada Software Development System.

Booz Allen & Hamilton Inc. has been granted a three-year, $16.7 million contract to provide the National Communications System (NCS) with engineering and analytic services. NCS is a confederation of 23 federal government organizations which oversees the National Security Emergency Preparedness Telecommunications system