LODI, CA – Members of thirteen public utilities and entities were applauded by over 300 invited guests and media at the dedication of the $388 million Lodi Energy Center on August 10th. LEC is home to the Siemens Flex-Plant 30 technology, enabling seamless integration of renewable energy sources.
“Lodi Energy Center will be the first operating Siemens Flex-Plant combined cycle plant in the USA and will contribute to meeting California’s ambitious renewable energy and green house gas reduction goals. This innovative fast ramping gas fired plant was specifically designed by Siemens as a solution to balance fluctuations on diverse power grids managing both renewable and traditional energy sources,” said Mario Azar, President, Siemens Energy Solutions, Americas.
The LEC is owned and operated by Northern California Power Agency. “NCPA is proud that the Lodi Energy Center is the first generating facility in California to utilize the Siemens Flex-Plant 30 ‘faststart’ technology. The plant’s technology will help strengthen electrical system reliability as variable renewable resources continue to be deployed to achieve California’s important energy goals,” stated James H. Pope, General Manager, Northern California Power Agency during the dedication ceremony. The Siemens Flex-Plant 30™ Power Island consists of a Siemens SGT6-5000F gas turbine-generator operating in combined cycle mode with a Siemens SST- 900RH steam turbine-generator. To power the steam turbine, gas turbine waste heat is captured by a Benson-style Heat Recovery Steam Generator (HRSG) provided by Nooter/Eriksen. The plant uses a Siemens SPPA-T3000 control system.


Mario Azar, President
Siemens Energy Solutions, Americas

The Siemens Flex-Plant 30™ fast-start capability is designed to deliver about 200 MW of power capacity within only 30 minutes. Fast-start technology will allow participants to expand and rely more on weatherdependent wind and solar energy resources since LEC can provide timely backup power. Fast-start also reduces greenhouse gas emissions by 30% when compared to conventional units. Other features that contribute to start the plant very fast are innovative piping warm-up strategies, the Siemens’ steam turbine stress controller (TSC), a modern water treatment system, and optimized plant stand-by using auxiliary steam to maintain vacuum. Using the Siemens SGT6-5000F gas turbine as the prime mover, the plant will provide high power density while requiring a relatively small plant footprint and is capable of daily cycling at efficiencies over 57 percent. Siemens has made steady engineering improvements to their STG6 turbine based on 3.5 million hours of operational experience, CO₂ and NO× emissions will be constrained by the LEC to 2ppm each. This amounts to a two-thirds reduction in the CO₂ emitted by these machines since the year 2000 (down from 6ppm), as well as a onethird reduction in NO× (down from 3ppm).

LEC uses reclaimed water from Lodi’s White Slough Water Pollution Control Facility located adjacent to the power plant. The tertiary-treated water is further processed by LEC’s advanced water quality facilities before use in the steam generation process and in the power plant cooling system. LEC utilizes a seven-cell cooling tower provided by SPX Cooling Technologies, Inc.
The City of Lodi is expected to receive approximately $1 million for the sale of 1,800 acre-feet of reclaimed water annually, turning a water disposal liability into a financial asset for the host city. The site is also adjacent to the NCPA’s existing combustion turbine STIG unit installed in 1995. A new 2.7-mile gas pipeline will be placed and LEC will be able to tie directly into the power grid through the existing switchyard.

All OEM equipment for the Lodi Energy Center was delivered ahead of schedule. Siemens assigns a factory load planner to monitor the manufacturing of the gas turbine and steam turbine for all projects to resolve any schedule issues. For LEC, a project expediter was dispatched by the Siemens Orlando-Team to Finspong in Sweden to monitor and expedite the critical path steam turbine manufacturing progress.
Siemens also assigned a project specific site services procurement specialist to support unplanned or emergency needs for parts or services. They developed a logistics plan for special rail car usage and transit clearance and routing to ensure the gas turbine and the generator delivery to site without schedule delays through the Port of Stockton, CA.

Siemens followed a detailed safety program for the site. Siemens Project Manager and Project Engineer independently conducted and documented a formal site Safety Walk at every site visit. There were also regular site audits to assure adherence to Siemens and site procedures and prompt action and resolution for any quality incident reports. This focus on safety resulted in an impressive Zero Lost Time Accidents (LTA) for OEM or its subcontractor personnel with over 16,000 man-hours on site.
Siemens also provided in house expertise to assist in interfacing and obtaining design approval of specialty engineering designs including CBO, Fire Marshal, and authorized ASME Inspector approvals.

The Northern California Power Agency (NCPA) is a California joint-action agency originally established in 1968 that owns and operates a portfolio of electricity generation resources that are 95% carbonemission free.
Nine of NCPA’s 16 members, along with four other public entities, are sharing in LEC’s investment and benefits. The City of Santa Clara’s Silicon Valley Power is a major participant in the LEC with a 25 percent share of the project. The San Francisco Bay Area Rapid Transit District (BART) will use its portion of LEC’s output to help power its transit system trains. The Modesto Irrigation District and the municipal utilities serving Lodi, Gridley, Ukiah, Healdsburg, Biggs, Lompoc, and Azusa will receive LEC energy, along with the Plumas-Sierra Rural Electric Cooperative, and the Power and Water Resources Pooling Authority.
The largest participant, DWR, with a 33.5 percentage will pump water along the California Aqueduct to benefit millions of Central and Southern Californians.
In the Bay Area, Silicon Valley Power will use energy to help power Santa Clara’s high-tech and internet communications businesses. BART will use the LEC to power their trains throughout the Bay.
The benefits of this new power plant will be felt as far north as the Plumas- Sierra Rural Electric Cooperative, headquartered in Plumas Count, and as far south as the City of Azusa in Los Angeles County.
The NCPA member communities of Lodi, Lompoc, Gridley, Ukiah, Healdsburg, and Biggs will utilize their energy shares to serve their homes and businesses.
The Power and Water Resources Pooling Authority will distribute its share of energy to nine irrigation districts located in the Sacramento and San Joaquin Valleys and in coastal counties north and south of the Bay.
The Modesto Irrigation District will provide LEC energy to its residential, commercial and agricultural customers.

Based upon LEC Power Sales Agreement obligations, NCPA issued revenue bonds in 2010 on behalf of 13 participants. MID financed its portion independently. A portion of the bonds were issued as “Build America Bonds” under the American Recovery and Reinvestment Act of 2009, resulting in a $23 million savings in project financing costs.

During the more than two years LEC was under construction, it created hundreds of high paying jobs for Central Valley workers. A minimum of 80 percent of the 300 skilled LEC workers resided within 50 miles of the Lodi area. Under the “Helmets to Hardhats” program, three percent of the construction workers were military veterans.

Panda Temple Power completed financing for a 758 MW gas fired combinedcycle power plant and selected a turnkey construction consortium of Siemens and Bechtel. Siemens will deliver the power island including two gas turbines, one steam turbine, three generators and the instrumentation and control system, using FLEXPLANT 30 technology.
Bechtel will be responsible for the engineering, procurement, construction and commissioning of the facility. The 250 acre facility is in Temple, TX, south of Dallas. Commercial operations of the plant are expected to begin in 2014.

The El Segundo Energy Center was originally designed as a redevelopment project in 2000 when it submitted its application to the California Energy Commission for certification. It was designed as a 630-MW gas-fired combined cycle power plant and would replace two of the four existing generating units built by Southern California Edison in the 1950’s. At the time, it was jointly owned by Dynegy and NRG.
The CEC approved the project in 2006, not without controversy. Emissions permits were at the heart of the controversy, along with once-through ocean cooling which the existing generators use.
In 2007, the company submitted a request to the CEC to amend the plant’s license. El Segundo proposed eliminating the use of ocean water as the cooling watersource for the project by redesigning the facility to use Siemens’ new fast-start R2C2 turbines and dry cooling, changing the nominal plant capacity from 630 MW to 560 MW.
Additional changes were proposed to support this change in design and to address a new laydown area and new equipment delivery options, including ocean delivery over the beach and a new land route.
The CEC approved the redesigned project in July 2010. Construction began in May 2011.
Siemens has successfully completed over 330 projects worldwide; over 105 turnkey projects were completed in the Americas.