A collection of articles about events that occurred through winter 2018 in the NEM (i.e. from 1st June to 31st August 2018)
About the Author
Paul McArdle
Paul was one of the founders of Global-Roam in February 2000. He is currently the CEO of the company and the principal author of WattClarity. Writing for WattClarity has become a natural extension of his work in understanding the electricity market, enabling him to lead the team in developing better software for clients.
Before co-founding the company, Paul worked as a Mechanical Engineer for the Queensland Electricity Commission in the early 1990s. He also gained international experience in Japan, the United States, Canada, the UK, and Argentina as part of his ES Cornwall Memorial Scholarship.
Related Articles
Paul McArdle Fri 27th June 2014
Windy week blows in change in Canberra
With the repeal of the carbon tax looking more likely, and July 1st only just around the corner, someone asked today if we could calculate what the spot price might be without carbon.
Paul McArdle Wed 17th June 2009
Tassie hits the Cumulative Price Threshold
For only the third occasion in the 10 1/2 years that the NEM has been operational, the Cumulative Price Threshold (CPT) has been reached. Yesterday evening, the CPT was reached in the Tasmanian region.
Paul McArdle Tue 22nd July 2008
Winter 2008
Miscellaneous articles on activity in the NEM during winter 2008.
Paul McArdle Thu 2nd June 2022
Morning price volatility on Thursday 2nd June 2022
A quick look at this morning’s volatility – and also with respect to coal unit availability prior to the expected tight conditions this evening.

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