Interesting! May I ask what area you lived in (not due to the power distributor, but the age of the infrastructure in the area). The areas I've had issues are Brunswick, Thornbury and Footscray. Folks at work (we're a bit spread out but mostly Melbourne based) often talk of minor outages etc...
I actually had some electronics fail quite recently after a number of minor outages and speaking with insurance they were saying it's very common in certain areas where the infrastructure is aging or has recently been struck by lightening.
I have noticed the operating voltage in the inner north seems to vary between as low as 217V to 246V, but it's quite frequent you notice the lights dimming in houses round here. I don't think there were any last summer (if you could call it a summer) but usually I'd experience 2-5 (ish) complete outages on hot days, when I spoke to someone in know they said this is normal as they load shed you can experience short outages.
Load shedding is quite rare, I believe the only instance recently in Melbourne was on the 13th of February when several transmission towers carrying the Moorabool-Sydneham 500kV circuits were destroyed in the severe storms that day, and load-shedding was required to keep the system in a secure state.
Outages are almost always due to faults in the local distribution network.
There are 5 different businesses that own and operate the distribution network in different parts of Melbourne (AusNet, Jemena, Citipower, Powercor and United Energy).
AusNet owns & maintains the transmission network in Victoria, but it is under the operational control of AEMO.
Dispatch of generation and FCAS instructions is NEM-wide and the responsibility of AEMO.
Interesting that there are so many different businesses responsible for supplying electricity in Melbourne. This might explain why several people have mentioned having different experiences with the reliability of the grid in Melbourne. In Chicago, Commonwealth Edison is responsible for the entirety of the grid.
Our power is very reliable and rarely goes out. Every few years a car hits a pole or something and we get a brief period of quiet time