Over the past two years, I have visited several electric power forums for problem solving, information collections and discussion. It might be happened that there exists lot of people looking for solutions but they may feel puzzled by large amout of data Googled or Yahooled by search engines.
I hope this brief review will be any help to reduce times cost for researchers, engineers...
I take this is the best one of online forum. the website hosts large amout of subjects within industrial engineering, which attracts many visitors to show their problems. It also very good as you don't need to sign in before you browse the question and answers. Almost everything is open for guest visitors except when you want to start a new tread. 
Most of the time it is ranked No.1 on Google or Yahoo search list, it centrals on Electricity and Electrical Energy, for exchange of policy and technical information.You can register for email notification of recent published news, they send you news almost every day, but I think most of them are advertizing or news information, which is very useful for marketing managers or product researchers looking for new products.
Note: You need sign in to look for further information.
3. PSAT forum (world famous but subject-limited and only for members)
Actually it is a Yahoo Group that discuss information through mail lists. Even Though it is for membership sharing insights, the PSAT is opensource for everyone, and it is easy to join in the group. It is really powerful, full of intelligence mainly for academic research, but there also groups engineering technicians for soft-applications, below is brief introduction of PSAT.
PSAT is a Matlab toolbox for electric power system analysis and control. The command line version of PSAT is also GNU Octave compatible. PSAT includes power flow, continuation power flow, optimal power flow, small signal stability analysis and time domain simulation. All operations can be assessed by means of graphical user interfaces (GUIs) and a Simulink-based library provides an user-friendly tool for network design.
Note: The PSAT source code can be downloaded from here.
4. Forumelectric http://www.forumelectric.com/
With multisubject platform, posted over one thousand articles and hundreds of subjects.
I am not a register but views the Q&A, it really holds many interesting subjects.
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