{"id":41927,"date":"2020-08-04T12:20:55","date_gmt":"2020-08-04T01:50:55","guid":{"rendered":"https:\/\/www.solarquotes.com.au\/blog\/?p=41927"},"modified":"2020-08-04T14:42:58","modified_gmt":"2020-08-04T04:12:58","slug":"inverter-low-voltage-ride-through","status":"publish","type":"post","link":"https:\/\/www.solarquotes.com.au\/blog\/inverter-low-voltage-ride-through\/","title":{"rendered":"SA Australia’s Guinea Pig For Inverter Low Voltage Ride-through Procedure"},"content":{"rendered":"

\"Inverter<\/p>\n

Friends, it\u2019s arrived: the Australian Energy Market Operator has published its standard low voltage ride-through test procedure for inverters.<\/p>\n

As we previously informed<\/a> our readers, South Australia\u00a0made its regulatory plans<\/a> in the expectation that the test would be mandated soon. As expected, the \u201cShort duration undervoltage response test\u201d, published\u00a0here<\/a> (PDF), will be mandated as of September.<\/p>\n

That means that – as it stands – no inverter can be installed in South Australia from September unless it has passed this testing procedure. That’s less than 3 weeks from now folks!<\/strong><\/p>\n

The aim is to verify that grid-connected inverters can survive brief undervoltage disturbances*. As commenter Jonathon Dore explained (correcting my original misreading of the standard – thanks, Jonathon, I’m new to electricity documents!):<\/p>\n

“There is one test at 180V and another test at 50V.<\/p>\n

“Specifically, one test to ensure that the inverter disconnects after 1s at just under 180V and another test to ensure that the inverter can ride through 220ms at 50V (i.e. maintains power output or re-establishes power output within 1s of the dip).”<\/p>\n

The note is intended to be read in conjunction with AS\/NZS 4777.2:2015, so the undervoltage test document is mercifully short, stipulating:<\/p>\n