برق. قدرت. کنترل. الکترونیک. مخابرات. تاسیسات.

دایره المعارف تاسیسات برق (اطلاعات عمومی برق)

PJM, the regional transmission operator that operates the electric grid in New Jersey and other nearby states, first mandated the S-R project in 2007 to address reliability issues that would begin affecting the grid in 2012. While PJM has been able to implement short-term fixes over the last three years, S-R was essential to ensure the long-term stability of the grid.

The project consisted of constructing a new 500-kV line, to augment an existing 80-year-old line operating at 230 kV, from the Susquehanna station in Berwick, Pennsylvania, to PSE&G’s Roseland switching station in Roseland, New Jersey. This required PPL and PSE&G to rebuild the towers to carry both lines. PSE&G built the 45-mile (72-km) section of the line in New Jersey, and PPL built the 101-mile (163-km) Pennsylvania portion.

PSE&G, sky crane, environmental
To minimize environmental impacts along the project ROW, crews used the Erickson Aircrane for general delivery, long-line delivery and precision sets.

Protecting Nature

The S-R project presented several complex engineering and construction challenges, none greater than the need to build the line across environmentally sensitive areas, including wetlands and a 4-mile (6.5-km) stretch through the Delaware Water Gap National Recreation Area. PSE&G took a number of steps to minimize the impact on these areas, including their native plants and wildlife. For example, where possible, helicopters were used to transport crews and install towers. This eliminated trucks, cranes and other project equipment from traveling in these environmentally sensitive areas.

By using the Erickson Aircrane for construction on this project, crews were able to avoid approximately 6 miles (9.7 km) and 13 acres (5.3 hectares) of access roads, and save nearly 1,000 trees within mature forested landscapes. In addition, the original plan involved building a road that would have impacted more than 45 acres (18 hectares) of wetland. Instead, less than 1 acre (0.4 hectares) of wetlands was impacted with the use of the helicopter.

The Erickson Aircrane was used for general delivery, long-line delivery and precision sets, which included conex boxes, concrete, mini excavators and tower sections. For this project, the Aircrane delivered more than 1 million tons (907,000 tonnes) of steel, with each delivery carefully planned and safely executed. Aircrane operations, which consisted of 314 lifts for 28 tower structures, were restricted to daytime hours and followed all applicable U.S. Federal Aviation Administration rules and regulations.

PSE&G, sky crane, environmental
At PSE&G’s Roseland switching station, the 500-kV GIS building and transformers associated with Susquehanna–Roseland project are located in the back left corner of the property.
PSE&G, sky crane, environmental
From left to right, George Sous, Kim Hanemann and Tony Maalouf look on as John Ribardo explains features of the Hopatcong GIS control house.

Right-of-Way Restoration

After the work was completed, there was a painstaking restoration of the right-of-way that required removal of more than 3 miles (4.8 km) of access roads, 16 work pads, three staging areas, tons of stone and thousands of wetland mats. The ground was then regraded and spread with new topsoil. Native seed mixes with species customized to the particular habitat were planted.

Coils also were installed on the lines at strategic locations frequented by American bald eagles to make it easier for the birds to see and avoid the lines. Bird-strike monitors, which alert officials if a bird strike occurs, also were installed. The U.S. National Park Service (NPS) was so pleased by the extensive measures taken that Kathleen Sandt, a spokeswoman for the NPS, said, “If you have to have somebody building a power line in your backyard, these folks [PSE&G] are great to work with.”

S-R also required significant work at PSE&G’s Roseland station, which, in addition to being the eastern end of the S-R line, also serves as the terminal point for two other strategic projects. The S-R team was responsible for building the 230-kV gas-insulated switchgear (GIS) for these projects as well as the 500-kV GIS for S-R.

Although the cost associated with building GIS is higher, the footprint needed is smaller, and this became the key point in favor of the GIS configuration. Concerns about the environmental impact of S-R were a big factor; therefore, using GIS enabled PSE&G to make the design as compact as possible and not impact sensitive wetlands and preserved lands.

S-R also required the construction of a green field 500-kV GIS station at Hopatcong. This station was the biggest earthwork project PSE&G has done since the Hope Creek nuclear plant, as it required the removal of rock to a depth of 20 ft (6 m). Hopatcong was placed in service in April 2014. It now serves as a four-way juncture for the existing north-south Branchburg to New York line and the east-west S-R line.

PSE&G, sky crane, environmental
Constructed entirely using a helicopter, this structure is the tallest structure on the S-R project, standing at 242 ft and located in the middle of Lake Denmark in Rockaway, New Jersey.

The Case for S-R

Communications and Public Outreach were other significant elements in bringing the project to this important milestone. “The difference between our project and the other transmission projects is that we were doubling the size of some of the towers, and were going through some rural residential areas,” said Senior Director John Ribardo, who had lead oversight of the S-R project. “People were concerned about their property values, construction impacts, electromagnetic fields, and the esthetics of the new taller towers. There was a small but vocal opposition who worked against the project.”

To counter this, the regional public affairs and corporate communications teams executed a communications plan aimed at explaining the need for this project and addressing the concerns it raised. Director George Sous played a lead role in the outreach efforts. Since much of the line passes through towns not in the PSE&G service area, he had to build a brand in the area. Using the same approach as in the PSE&G territory — getting involved in the same nonprofits and volunteer organizations — he was able to build some strong relationships and gradually make the case.

The project team built a communications program to ensure a consistent message, including a public website with a wealth of project-related information. Many of the municipalities traversed chose to link to this site from their official sites, which helped to ensure residents and other stakeholders received consistent messages and the most accurate information possible.

PSE&G, sky crane, environmental
As required by the National Park Service, the monopoles installed in the Delaware Water Gap National Recreation Area are made of weathered steel, which the NPS believes will improve the aesthetics of the monopoles.


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