Case note Battery energy storage PCS solution for EKZ, one
Battery energy storage PCS solution for EKZ, one of Switzerland''s largest energy companies BESS 1 MW / 250 kWh PCS solution at the Dietikon Power Plant in Zurich, Switzerland.
Thanks to its flexibility and storage options at multi-ple scales, from milliseconds to seasons, hydropower is the backbone of the Swiss electricity system. Keep-ing its central role would foster the integration of volatile renewable energy resources like photovoltaics and wind.
Herein, the hydropower generation and storage potential in three scenarios, from lower-bound to upper-bound, is summarized. In the upper-bound scenario the expected annual generation of 39.1 TWh/a slightly exceeds the target of 38.6 TWh/a as defined by the Swiss energy strategy 2050.
The reduction of human-made storage capacity in Switzerland is not precisely known or monitored. Em-pirical lumped estimates indicate an annual rate of loss of storage volume of ≈ 0.2 to 0.5 % of the total storage capacity in Switzerland and worldwide, re-spectively (Schleiss et al., 2010; Schleiss et al., 2016; Boes, 2011a; ZeK HYDRO, 2020).
The Swiss net annual electricity production amounted to 63 TWh on average over the last ten years (SFOE, 2019b). Thereof, 57 % (36 TWh) stem from HP (net produc-tion after subtracting the consumption of pumps at water adductions), 36 % (23 TWh) from nuclear and
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