POWER QUALITY BY MR. A CLEAN CASE.
Our PQ Power Quality division has been delivering filter and compensation systems for clean low- and medium-voltage grids the world over for over 15 years. The Hamburg sewage treatment plant with its facilities at Köhlbrandhöft and Dradenau is just one of its customers. These facilities treat all the wastewater produced by the city and its millions of inhabitants and produces environmentally-friendly energy at the same time. It's a pioneering concept and the only one of its kind in Europe.
Köhlbrandhöft, a manmade peninsula in the Northern Elbe, is home to a flagship project that helped Hamburg be crowned the European Green Capital 2011: the Köhlbrandhöft/Dradenau sewage treatment plant. Ten huge digester towers, lit up like Christmas trees at night, can be seen from some distance and are where the operator Hamburg Wasser produces methane from sewage sludge. They are an example of how the wastewater treatment plant is also a generator of energy.
Hamburg's sewage treatment plant used to be one of the biggest consumers of energy in the city, but today it's fully self-sufficient. It is currently the only sewage treatment plant in Germany to produce more energy than it needs – and it does this in an environmentally-sound way from digester gas together with wind turbines, photovoltaics, and a combined heat and power plant. Hamburg Wasser supplies excess energy to the grid. The company modernized all the electrotechnology for the sewage treatment plant's centrifuges in a retrofit project completed in November 2014. To keep the power network free of harmonics, the company fitted four GRIDCON® ACF active filters from MR.
"The main criterion applied in finding the right active filters was a manufacturer with solutions suited to line voltages of 400 VAC and 690 VAC," says Horst Oehlert, the responsible project engineer at Hamburg Wasser. Working with a local supplier, MR managed to win the contract with its GRIDCON® ACF because this active filter is the only one on the market to offer the performance features required by Hamburg Wasser. Another selling point was the GRIDCON® ACF concept with up to four modules per cabinet, which allows the compensation rating to be designed to meet requirements and gradually expanded if required. The standardized components reduce costs and can be combined economically with systems for passive reactive power compensation.
Industrial version of the GRIDCON® ACF
One of the focal points of work in MR's Power Quality division is reducing harmonics and compensating for reactive power in public and industrial distribution grids with GRIDCON® active filters. In this work, the industrial version of the GRIDCON® ACF is the first choice for challenging compensation tasks in which reliability and safety must be ensured even outside of standard operating voltages and under demanding ambient conditions.
Download flyer for industrial version of the Gridcon® ACF