I don'w know about pump-like-turbines, but many have used the OutBack Power MX60 charge controller with microhydro with success. There are optimizations in the MX60 software especially for hydro too, like letting it sweep from open circuit voltage all the way down to battery voltage as well as disabling the mini-sweeping normally done when used in PV mode.
The concern is when the turbine free-runs. The input (DC) free running turbine voltage must not go above 150 Volts Max when the hydro is unloaded, and the turbine (bearings) must be able to handle the higher speed, which will happen from time to time. This may happen when batteries are full, battery side loads go away, or when the MX60 starts up or resets or is turned off. A diversion control on the battery side could be used as a failsafe or, better yet, a PV input side clipper can be built (non MX input shorting) to limit the MX60 input voltage and give the hydro a minimum load if necessary. Nozzle and field adjustment may help as well. Normally, a turbine optimized or wired for 48V battery using typical diversion regulation techniques will have quite a high free running open circuit voltage, (over 150 volts), so these installs are usually the ones that may have a problem with free running. If you check your unloaded voltage, use some capacitance across the output to reduce high voltage spikes. The short spikes will not be there when connected to an MX60 since the MX has a few thousand microfarads across its input, and will filter very well (after you are sure the average DC voltage won't skyrocket) All this being said, I have heard of 28 percent or more increase in hydro output from certain hydros, especially systems with long wire runs. boB --- K7IQ OutBack --- In [email protected], tajuddin waris <[EMAIL PROTECTED]> wrote: > Dear > All member > > As we know that MPPT (maksimum power point tracking) have been used in PV and wind turbine in order to improve efficiency the whole system. Is there any research application of MPPT for microhydro particularly microhydro driving small turbine like pump as turbine ? > > regard > > waris > > > > Send instant messages to your online friends http://uk.messenger.yahoo.com > > [Non-text portions of this message have been removed] Does your company feature in the microhydro business directory at http://microhydropower.net/directory ? If not, please register free of charge and be exposed to the microhydro community world wide! NOTE: The advertisements in this email are added by Yahoogroups who provides us with free email group services. The microhydro-group does not endorse products or support the advertisements in any way. More information on micro hydropower at http://microhydropower.net To unsubscribe: send empty message to [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/microhydro/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
