The Japanese Ministry of Economy Trade and Industry (METI) has provided hourly data for a full year (April 2010-March 2011) for the entire country seperated in 10 regions. Data per region are available in seperate pdf files. The website is in Japanese, it is therefore advisable to use a translate function (e.g. in Chrome).
Singapore's Energy Market Authority has provided an online database with half-hourly demand, downloadable per month from the year 2004 onwards. Data is available in csv format or as pdf.
ENTSO-E hourly load time series for European countries
The European Network of Transmission System Operators for Electricity, ENTSOE-E, hold hourly demand data for each EU country. Their terms and conditions do not allow redistribution. It may be worth our while putting in a single, co-ordinated request to cover access to and redistribution of the archive.
Open Power System Data hourly load time series for European countries
Open Power System Data (OPSD) is a platform for European power system data such as power plants and load, wind and solar time series.
OPSD will provide coherent versions of the ENTSO-E time series, with errors and time zones consistent across the dataset.
Elexon time series for Great Britain
Elexon manages the data for the GB network, and this is available half-hourly. Registration is free. They've been very helpful with our network of UK universities in facilitating access to data, to date. Again, a co-ordinated approach will be best. There are also several different variations of total demand available from the GB National Grid, also all half-hourly
Historical hourly load (updated every hour) for Russia's unified electricity transmission grid system is provided by Russia's Federal Grid Company. Data can be downloaded in csv or xml format limited to 24 hours (full day) per download. Profiles are available for the unified grid as a whole or per subregion. The website is in Russian, it is therefore advisable to use a translate function (e.g. in Chrome).
Historical hourly load data for the Ontario area in Canada, operated by the Indepedent Electricity System Operator (IESO), can be downloaded in CSV format from IESO's website.
Hourly load data, 2016 only, for the Alberta Interconnected Electric System (AIES) can be retrieved from the website of Alberta Electric System Operator (AESO).
Hourly load profiles for the period 2015-2017 are available on the website of the EIA. Data can be downloaded for the entire US, or seperately per region or balancing authority. Hourly load per balancing authority for years before 2016 can be accessed through the website of the Federal Energy Regulatory Commission (FERC).
The data dashboard of the Australian Energy Market Operator (AEMO) includes half-hourly load data per month, per subregion, of the Australian National Electricity Market (NEM) downloadable for the period 1998-2017. The NEM consists of the regions Queensland, New South Wales, Victoria, South Australia and Tasmania. In 2013 the NEM covered approximately 90% of Australia's grid connected electricity demand (p.13).
The electricity market information (EMI) website of New Zealand's Electricity Authority includes a database with half-hourly load data downloadable in CSV format for any customizable period from 2004 onwards. Data can be aggegrated for New Zealand as a whole, per subregion (5 in total) or per node.
The Coordinador Electrico Nacional, an independent corporation of the Chilean state, provides a wide variety of datasets regarding the power sector on their website. This includes hourly load data downloadable in aggegrated zip files per year. The zip file consists of seperate excel files per day of the year. All data and supporting information is in Spanish.