The rushing waters of Washington State’s Colville River gets tamed in part by DEIF controllers at a remote hydro plant

Nestled deep within the Colville National Forest along the Colville River in Washington State, the Meyers Falls Hydroelectric Plant runs in relative silence, its generators making a constant low humming that gets drowned out by the sounds of constantly pounding water from the nearby towering waterfall. Taming those waters through finite control to generate energy is where DEIF plays a role.

For the past 100 years, Meyers Falls Hydroelectric Plant has withstood the test of time, creating clean, renewable power to homes and businesses in nearby towns like Kettle Falls, Greenwood and Colville, located about two hours north of Spokane. Known as the oldest continuously operating waterpower site west of the Mississippi River, the Meyers Falls Plant now delivers power to more than 1,000 homes and businesses in the region. The output generated by the plant goes directly into the grid.

“DEIF is a great solution for a small hydro operation like us,” Ben says. “All of the features in the new GPC-3 controller make for a great product. From water level to VAR control, to the control of the turbine genset, it has been the right solution for us all these years.”

The variability of the Colville River and its seasonal water levels have always remained a concern for a hydro operation like the one at Meyers Falls. Relying on Mother Nature to deliver a level and consistent flow of water all year round would be futile. Mike Johnson, who bought the plant from a local utility in 1999, was immediately drawn to the DEIF water level control functionality in the GPC controller unit.

“With the water level control built in, DEIF controllers automatically adjust the water flow through the turbine according to the river flow conditions,” Mike explains. “That was a big deal. Some of the other features, like the protection package, give it full protection in terms of frequency, overvoltage, undervoltage, and regulation of current, all necessary for power plants.”

Ben believes one of the primary benefits of the DEIF GPC controller is the unique all-in-one component-based system design. Without DEIF in the picture, Ben and Mike would have been forced to acquire and integrate programmable logic controllers, a separate generation control package, protection and AVR (automatic voltage regulator) control. “We’d have a cabinet full of equipment and would have likely spent quite a bit more for the PLC package” due to the extreme cost of separate units, Ben explains.

The plant uses DEIF’s utility software v.3 (USW-3), which is a unique tool for end-users and others in order to configure and supervise one or several interconnected genset controllers. On the easy-to-use USW interface, a device overview page allows users to view the AVR and regulator status, monitoring in real time the voltage frequency, breaker status and much more. With a direct connection to the GPC-3 controllers, the USW remains open all the time on a computer station near the controller cabinet, and Ben and Mike can make any changes needed, accessing it locally – or even remotely if needed.