Market Failure: example for debate

Just a little local (for me) bit of interesting debate (i thought it was interesting considering the usual dialog found here)
In New Zealand we have a slightly less centrally controlled electricity sector compared most US states.
We have tried (and for the most part done pretty well) using a free(ish) market to supply electricity to NZ for the past 10-15 years.
Once again the central control vs free market control debate has been sparked when a transmission (powerlines) outage caused an effective monopoly in the system. The transmission outage was planned up to a year in advance and details were widely known.
The outcome was this: The monopoly party priced up their power generation to a level 200-400 times the usual market price for a period of around 6 hours. This resulted in super inflated prices that had no underpinning economic drivers/fundamentals to rationalise them.
The "guilty" (i'll let you make up your own mind as to guilt) party has claimed that other market participants should have hedged and prepared in advance for this kind of thing and they were just trying to recover some costs of their more expensive generating plant.
The affected parties (other generators/retailers etc) claim that the "guilty" party was acting irrationally, immorally, and was actively breaking a market that had, up to this point, been working ok.
Source:
http://www.stuff.co.nz/business/industries/4818281/Mighty-River-Power-hit-by-price-surge
http://www.stuff.co.nz/business/industries/4826960/Genesis-warns-power-industry-on-price-spike
Thoughts on the situation?
In New Zealand we have a slightly less centrally controlled electricity sector compared most US states.
We have tried (and for the most part done pretty well) using a free(ish) market to supply electricity to NZ for the past 10-15 years.
Once again the central control vs free market control debate has been sparked when a transmission (powerlines) outage caused an effective monopoly in the system. The transmission outage was planned up to a year in advance and details were widely known.
The outcome was this: The monopoly party priced up their power generation to a level 200-400 times the usual market price for a period of around 6 hours. This resulted in super inflated prices that had no underpinning economic drivers/fundamentals to rationalise them.
The "guilty" (i'll let you make up your own mind as to guilt) party has claimed that other market participants should have hedged and prepared in advance for this kind of thing and they were just trying to recover some costs of their more expensive generating plant.
The affected parties (other generators/retailers etc) claim that the "guilty" party was acting irrationally, immorally, and was actively breaking a market that had, up to this point, been working ok.
Source:
http://www.stuff.co.nz/business/industries/4818281/Mighty-River-Power-hit-by-price-surge
http://www.stuff.co.nz/business/industries/4826960/Genesis-warns-power-industry-on-price-spike
Thoughts on the situation?