How can I design a phase locked loop for grid tie inverters?

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Abdelhalim Zekry Popular answer

Dear Colleagues,

Dear Shyam,

You can find complete design, simulation and implementation of grid connected inverter

including the PLL synchronization circuit with the grid frequency and phase in the paper

Simulation and Implementation of Grid-connected Inverters, given in the Link: www.researchgate.net/publication/233902842_Simulation_and_Implementation_of_Grid-connected_Inverters

If any question you can contact me or the first author Ahmed Abdalrahman

He is a member of the Researchgate.

Wish you success.

Article Simulation and Implementation of Grid-connected Inverters,

Syed Zulqadar Hassan

It is present inside simulink, just search it, give a sinusoidal signal of your required frequency

Abdelhalim Zekry

Shyam Pradeep

thank u

Ume Hani Malik

paper is really a master piece.

can anyone please tell me, How to calculate the values of reference currents id* and iq*?

Ahmed Abdalrahman

Hallo,

Please note that ( Id* and Iq*) are the d (direct) and q (quadrate) components of desired output current, which are injected to the grid. Then, this values determine the output power of the grid connected inverter. Therefore, to calculate the values of ( Id* and Iq*) you need to know the desired output Active and reactive power of your inverter.

P = Vd*Id + Vq*Iq ,

Q = Vd*Iq − Vq*Id

Much further details can be found in this thesis:

Thesis Master of Science dissertation, Digital control techniques f...

Thank you for the timely reply.

i have some confusions regarding the design of grid connected inverter.

i will start one by one.

Please correct me where i am wrong.

according to the basic block diagram, phase angle of grid voltage is calculated by PLL, then this angle is used for dq0 transformations for grid voltages and inverter currents. this inverter current is current before filter?