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45 Threads found on Grid Connected
Hello everyone, we used PMSG generator and when rpm cross 24 and active power 436kw that time i got grid vector jump err . plz tell me how to find out problem. possible its related to cable shielding ?????
Hi, how are the wires connected, shows a single green wire connecting to 8 reed switches. this is correct. It is like in your house. One wire coming from the grid goes to several switches in your house. Form the switches there are independet lines to the load(s). Klaus Btw: instead of connecting 8 MUXes to the 64 switc
Hi, in this design, can I use the PL504 instead of the 6dq6, since the last grid of the PL504 is internally connected to the cathode? What changes would be needed, and what short of performance (output power) would you expect at the same anode voltage?
The current sensor should be connected after the EMI filter. i.e. between the Inverter and the utility mains. Not necessarily. In case the sensor is utilized for inverter overcurrent detection or space vector modulation with direct current control, it must be placed on the inverter side of the output filter. The output filter is mor
I am doing project on Transformerless grid connected inverter based on zero current transition technique.this topology is similar to H6 inverter ,the main difference is we have to use to use two resonant circuit with auxilary switches in order to achieve Zero current switching of the main high frequency switches S5 and S6... The problem is am unab
Hey guys about fuel cell system connected to the grid, do you think that the fuel cell should deliver the exact energy to match the load, or would it be better to deliver the maximum power of the fuel cell to the load and the surplus power would go the grid? I say this because fuel cells use hydrogen as fuel and it is not cheap, hence to (...)
it is much more regulated than this. No only does frequency matter but phase lag/lead when grid connected. There is a central authority who manages phase frequency specs and outputs of each supplier to grid. Adjustments are made to efficiently transfer ( buy/sell) power to also compensate for power factor ( lag/lead) and adjust frequency (...)
Hello all, I have a 5kW 220Vac solar inverter that should be connected to the grid. First off all, are all main distribution boards have three phase busbars? If so, would there be an unbalanced power distribution over 3 busbars with only one single phase inverter connected? How will it affect the grid? Secondly, (...)
Hi, I'd like to build a 3-phase DC to AC inverter that can regulate its output around 230V and frequency 50Hz and can be connected to the grid. I'd like to hear from professional people what is the most powerful microcontroller that can be used ? I am using PIC micro and have been advised to use PIC18F2331 as it contains many PWM ch . What is your
Hi, I have read that some topologies of grid connected inverters can only work for UPF, because the DC link capacitor is disconnected from grid during freewheeling period. Could some one explain or give references regarding reactive power transfer in grid connected inverter. Thanking you.
Hi. I need to matlab/simulink model for grid connected to photovoltaic with only inverter. with out dc dc converter.
So here's my latest anomaly I've noticed my internet speed (high speed broadband dsl) being very slow and not letting pages load. It worked normal for the first three months since off grid living started. I've contacted my service provider and they have trouble shooted a few things made some repairs gave me a new modem and still slow speed. Now, th
your inverter is connected to grid. so you need phase angle of the grid voltage. obtain it with any convenient method. suppose the angle of current is measured referenced to angle of voltage vector. decompose current vector in a frame in which voltage vector is x-axis, and an axis perpendicular to voltage vector . As you know in-phase (...)
I fear it's not so easy to derive a "typical" impedance characteristic of a grid connected power converter. I presume, you're referring to a grid connected inverter or a bidirectional converter with "active front end" (AFE), in other words a PWM bridge connected through an inductor or LC low-pass filter to (...)
If the input voltage is sourced from power grid, you have to think also about expectable surges and applicable overvoltage category. The imagined "voltage divider" element must be able to withstand rather high overvoltages. Provided the AC/DC converter is a regular off-mains switcher, it's input voltage must not necessarily be a pure sine and no
It looks like you learnt a valuable lesson to use plastic screwdriver for tuning gaps on magnet wire, as it appears the grounded L2 shorted out with the grid connected L1 possibly causing thermionic emission of grid particles in the inert gas, now making the gas "leaky" and hotter which in turn causes the grid to glow with (...)
I'm mostly curious - I'm not fully familiar with the details of the subject. Since a variable-frequency drive works from mains power/frequency and can drive a motor at any power level with greater efficiency, are they used in the reverse fashion - i.e. working with the variable power from a wind turbine - to connect to the grid? I've been reading
You missed out the most important concept - "anti islanding", the ability to disconnect all power sources if the incoming grid connection fails. It is a legal requirement that all sources of power are immediately isolated from the grid to preven it being 'back driven' from the inverters. In view of it being a wireless controller, you would also ha
The term power factor does not apply to a transistor. Power factor is the ratio of the real power divided by the indicated power, i.e. W/V X A. It is used in AC circuits (mains mainly), because the grid generators do not enjoy having a reactive load (low PF), so they put a limit on the PF connected to the mains. Frank
This is the solar panel I will work with (245 Wp): I am in India, and I would like to try to design a micro-inverter that can be grid-connected. This will particularly be useful for the poorer rural communities who would not be able to afford buying inverters from outside the country.