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Author Topic: First UK battery frequency response set enters service  (Read 175 times)
dan_b
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« on: September 11, 2017, 06:23:36 PM »

http://www.powerengineeringint.com/articles/2017/09/first-battery-entered-into-uk-firm-frequency-response-service.html

Lots of jargon and info, but basically, batteries on the grid for maintaining 50Hz is now a thing in the UK.
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3.06kWp SolarEdge system with a split array:
2.18kWp 10x South facing, plus 4x West facing 880W

Mk1 ImmerSUN DHW diverter
4kW PowerVault Battery
Philip R
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« Reply #1 on: September 12, 2017, 10:52:44 PM »

Bit short on detail,

Is the system just depatched by remote control or does the decice have frquency sensitive elements responding to frquency, rate of change of frequency and variable droop characteristics.

Back in the day when I worked in the ESI. The then new microgovernors were set up in line with then grid code . The conventional wisdom was that the droop Or gain of the system was 4%, i.e. a 2 Hz change of frquency lead to a 100% change in load. Turned out that was for the swinging balls governor, bit slow in operation and full of hysteresis.

The modern microprocessor governors could have different droops set up within different speed bands about the 50 Hz nominal frquency.

Back in late 1990s on a technical visit to Dinorwig, found out that the different units were then operated at differing frequency response rates, with different contract prices, due to the wear and tear to the running gear:, turbine picket gates (inlet guide vanes in English parlance) , the rotor winding connector straps and stator winding bracings, all taking a hammering everytime the load changed.

Philip R
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