Transmission Keeps Power Flowing
Powering on your computer for work. Brewing your morning coffee. Charging your cell phone. These simple actions rely on something invisible, yet vital—electric transmission. At Sunflower, our robust transmission system transmits bulk electricity from generation sources to our member cooperatives, ensuring homes and businesses across central and western Kansas receive affordable, reliable power.
The U.S. electric grid is a vast, interconnected network of nearly 200,000 miles of high-voltage transmission lines. Visually, the grid resembles a high-powered spider web spanning the country, delivering electricity from power plants to homes and businesses. Because wholesale electricity is typically generated far from where it's used, a strong and well-maintained transmission system is essential to meet the growing demand for electricity.
To provide our member cooperatives with dependable access to wholesale power, Sunflower works continuously to maintain and enhance our transmission infrastructure consisting of approximately 2,478 miles of transmission lines and 150 substations. In addition to meeting our members’ power supply requirements, Sunflower’s transmission system is utilized to export the hundreds of megawatts of wind energy produced in western Kansas to other states in the SPP region. As technologies evolve and energy use patterns shift, we are committed to modernizing our system by integrating new tools and strategies to accommodate resource diversity and increased expectations for grid resilience.
Investing in Resiliency
A resilient transmission system is the backbone of reliable wholesale power. Sunflower invests strategically to strengthen both the physical and operational integrity of our grid, helping ensure stability in the face of rising demand, extreme weather events, and evolving security challenges. These investments include reinforcing critical structures, modernizing aging equipment, and deploying advanced technologies that improve system flexibility and accelerate power restoration during outages. By prioritizing resiliency, we minimize service interruptions, enhance our ability to respond to unexpected events, and support the long-term reliability our member cooperatives depend on every day.
Governing Organizations Ensuring Grid Stability
Sunflower, as a member of Southwest Power Pool (SPP), falls under the governance of regulatory and reliability organizations. As a regional transmission organization (RTO), SPP is mandated by the Federal Energy Regulatory Commission (FERC). SPP is a regional entity of the North American Electric Reliability Corporation (NERC).
SPP is the RTO coordinating the reliable operation of the electric grid and wholesale power markets across a 14-state region in the central United States. For electric utilities like Sunflower, SPP manages the transmission network, balances electricity supply and demand in real time, and administers competitive electricity markets to ensure cost-effective power delivery. SPP also plans regional transmission expansion to support grid reliability, integrates renewable energy resources, and facilitates efficient power flow across member utility systems. Through its coordination and oversight, SPP plays a vital role in maintaining a stable, efficient, and reliable power grid for millions of consumers.
As an RTO, SPP is mandated by FERC to ensure a reliable supply of power, adequate transmission infrastructure, and competitive wholesale prices of electricity. As a NERC entity, SPP oversees compliance enforcement and the development of reliability standards.
FERC is an independent federal agency responsible for regulating the interstate transmission of electricity, natural gas, and oil. In the electric utility sector, FERC oversees the reliability of the bulk power system, regulates wholesale electricity markets, and ensures transmission rates and services are just, reasonable, and non-discriminatory. The commission also reviews and approves proposals for new transmission infrastructure, monitors energy markets for fairness and transparency, and enforces compliance with reliability standards developed in coordination with NERC. Through these functions, FERC plays a critical role in maintaining a reliable, efficient, and competitive electric grid across the United States.
NERC is a not-for-profit international regulatory authority responsible for ensuring the reliability and security of the bulk power system across North America, including the United States, Canada, and parts of Mexico. NERC develops and enforces reliability standards that electric utilities and transmission operators must follow to maintain the stability of the grid. In coordination with the FERC in the U.S., NERC monitors system performance, assesses risks, investigates system disturbances, and works to prevent blackouts through mandatory compliance and continuous improvement efforts. Its mission supports a safe, reliable, and resilient electric grid that serves millions of consumers.