Hypontech – One of the 1st Inverter Companies to Pass AEMO’s VDRT

2020-09-07Company News


Recently, HYPONTECH has passed Short Duration Voltage Disturbance Ride-through Test (VDRT), which is now an obligatory inverter test procedure outside AS/NZS issued by AEMO and Australian government.

Without altering inverter designs in Australian market to adapt the test, Hypontech was one of the few inverter companies that effectively responded to AEMO’s sudden trial. Shortly after the tests was carried out in TÜV SÜD’s laboratory, HPS single phase inverters and HPT three phase inverters both passed VDRT.


Hypontech’s decisive reach and the quick pass to Australian’s new test procedure certified the reliability and quality of our inverters, showing that we are dedicated to energizing the future for people, with a secured, highly profitable power system.




The Australian Energy Market Operator (AEMO) has conducted a wide series of consultations in 2020. Having identified through analysis of recent power system events that approx. 40% of South Australia’s inverters do not meet AS/NZS 4777.2:2015, the Australian Standards for Distributed PV Inverters, AEMO decided to take further actions.


Given the huge, growing scale of Distributed Energy Resources in South Australia, and a whopping 1.2 GW of Distributed PV, AEMO has concluded that those inverters not meeting the current standards would induce security impact to the power system.


40% would disconnect following a transmission-level undervoltage fault, which then causes an unknown portion of the fleet to suddenly disconnect.”

– AEMO’s consultation, June 18th, 2020


AEMO has also proposed in the consultation that for them to maintain security in all circumstances, inverters should behave in a predictable and manageable way during fault. The VDRT was hence issued as an additional but mandatory test procedure applied to all Distributed PV Inverters in Australia, including those that are already compliant with all tests within scope of current AS/NZS 4777.2:2015.


Development and publication of VDRT is a part of AEMO’s broader strategy to address the requirement to solar inverters and DPV, by extension, to improve the security of power system in Australia.



For detailed background about AEMO and VDRT, please visit https://aemo.com.au/



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