Overview
Sub 91 is an operational electrical substation owned by MidAmerican Energy in the United States. It handles voltages of 345 kV and 161 kV, serving the regional grid.
Sub 91 is an electrical substation located in the United States, owned and operated by MidAmerican Energy. The facility is operational and handles high-voltage transmission at 345 kV and 161 kV, indicating its role in the bulk power system. As a substation operating at 345 kV, Sub 91 is part of the high-voltage transmission network, which is critical for long-distance power transfer and grid stability. In the United States, such facilities are subject to NERC reliability standards and FERC regulation to ensure grid security and operational compliance. The dual voltage levels suggest it serves as a step-down or interconnection point between transmission and sub-transmission systems. The substation's location in the Midwest, a region with a mix of coal, wind, and natural gas generation, positions it as a key node for integrating renewable energy sources. Its operation by MidAmerican Energy, a major utility, underscores its importance in maintaining reliable electricity supply to residential, commercial, and industrial customers in the area.
Environmental context
The substation is situated in a region characterized by a mix of urban and agricultural land use. Its high-voltage equipment is designed to minimize electrical losses and electromagnetic field impacts, with standard mitigation measures such as grounding and shielding. The facility's operation supports grid reliability and the integration of renewable energy, contributing to reduced greenhouse gas emissions by enabling efficient power transmission.
Frequently asked questions
Sub 91 is located in the United States, with coordinates approximately 41.681348 N, -90.527651 W. It is owned and operated by MidAmerican Energy.
Sub 91 handles two voltage levels: 345 kV and 161 kV. The 345 kV level is typical for high-voltage transmission, while 161 kV is used for sub-transmission or distribution.
Sub 91 is owned by MidAmerican Energy, a major utility in the United States. The operator is also MidAmerican Energy, as indicated by the facility data.
As a high-voltage substation in the US, Sub 91 must comply with NERC reliability standards for grid stability and FERC regulations for interstate transmission. These standards cover equipment maintenance, cybersecurity, and operational protocols.
A 345 kV substation serves as a critical node in the high-voltage transmission network, stepping down power from extra-high-voltage lines to lower voltages for regional distribution. It also facilitates grid interconnection and power flow management.