Two common interconnection methods are substation interconnection and line tapping:Substation interconnection: For this method, the solar farm sends electricity through a generation intertie (gen-tie) line to a new or existing substation. Line tapping: Line tapping bypasses the substation, instead establishing the POI on a transmission line.
All solar farms connect to a specific point on the electrical grid, the vast network of wires that connects every power generation plant to every home and business that consumes power. That point is called the “point of interconnection,” or POI.
Why do solar farms need Transformers & substations?
Transformers or substations play a crucial role in connecting a solar farm to the grid by stepping up the voltage of the electricity generated by the solar panels to match the grid's high voltage levels. This is essential for efficient long-distance electricity transmission from the solar farm to the grid.
Does a solar farm need a generation tie?
Unless a solar farm is installed next to transmission lines or substations, the solar contractor needs to install a generation tie to connect the clean energy project to the grid. These are expensive to construct and can have a significant impact on the project's return on investment.
How much voltage does a solar farm need?
If the nearest transmission line to your property has a voltage of, say, 115 kV (115,000 volts), the output voltage from the solar farm needs to “step up” to 115 kV to feed power into it. Likewise, the power that line carries to a neighborhood 50 miles away eventually needs to “step down” in voltage so that homes can use it.
How does a solar farm work?
Power generating plants such as solar farms output power at different voltages, too. If the nearest transmission line to your property has a voltage of, say, 115 kV (115,000 volts), the output voltage from the solar farm needs to “step up” to 115 kV to feed power into it.
What is a solar farm substation?
Modern solar farm substations are equipped with protection devices, such as circuit breakers and relays, that safeguard both the solar farm and the grid from electrical faults or anomalies. It also includes control systems that manage the flow of electricity, ensuring that the power output meets the grid's requirements.