Voltage Optimization

Voltage Optimization is the use of automation on distribution voltage control devices (switched capacitor banks, voltage metering, voltage regulators and LTC’s) to reduce the reactive power (VAR) flows on a circuit, and lower the voltage within regulatory limits to reduce end-use customer energy consumption and utility distribution system losses.

• Senate Bill 2814 requires that Ameren help customers realize increased value from smart grid, including voltage optimization measures.
• VO allows us to modernize our grid in order to continue to provide reliable, low-cost energy delivery services to our customers.
• VO aligns with Ameren’s strategic direction and goal of providing value for our employees, our investors, and the customers and communities that we serve.

Ameren Illinois has always followed the American National Standards Institute (ANSI) and been regulated by the Illinois Commerce Commission (ICC). To help reduce energy waste and help our customers be more energy efficient, we will use automation to operate voltage at optimal levels. This means that voltage levels will fluctuate throughout the day based upon loading on the circuit. Voltage levels will stay within the allowed range, but these fluctuations may impact some sensitive equipment owned by our three-phase customers.

Nationally, voltage range recommendation is established by ANSI, while the Illinois Administrative Code outlines voltage range requirements for the state of Illinois.

This will be a seamless transition for our single-phase customers. This process does not impact customers served from subtransmission 34kv, 69kv or 138kv. This is mainly a notice to our three-phase business customers. Impacts may vary based on your owned equipment. We recommend three phase customers with sensitive equipment work with an electrical contractor to ensure their equipment will operate throughout the allowable voltage range.