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green_is_now
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re: Enhancing the efficiency of photovoltaic systems
green_is_now   1/18/2013 5:23:40 PM
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Microsmi makes vry lo pwer FPGA device. Misleading is the use of 1t,2nd,srd for efficiencyimprovements the are all seperate and inependent issues. MPPT input power otimization. PWM, how any MPPT, PFC, PFM or PWM circuit works, it s the basis of all modern power conversion. PFC = current propotionl to voltage... over fundamental period. All must be used together to maxamize efficiency.

Some Guy
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re: Enhancing the efficiency of photovoltaic systems
Some Guy   11/16/2012 10:32:26 PM
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At a systems level, if you have any electrical storage in the system, you are best off to connect the panels and the batteries by DC, not AC. That typically results in 10% more energy available when you invert the AC out of the storage. (1. Eliminates a conversion: DC -DC - AC instead of DC - AC - DC - AC, and 2. higher end-to-end efficiency)

jadwin79
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re: Enhancing the efficiency of photovoltaic systems
jadwin79   11/16/2012 4:29:05 PM
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If by "prevalent" you mean installed capacity, then wind far outstrips solar. Latest numbers I saw were 238 GW for wind, 67 GW for solar. You also mention solar efficiency of 19% (that is a typical number for panels themselves) and then say we need 95% to "maximize use of harvested solar energy". I think you probably meant to say that just the inverter efficiency should target 95% since basic physics limits existing Si panel efficiency to about half that.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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