Enhanced Phase-Locked Loop Structures for Power and Energy by Masoud Karimi-Ghartema

By Masoud Karimi-Ghartema

Filling the space out there devoted to PLL buildings for energy systems

Internationally famous professional Dr. Masoud Karimi-Ghartemani brings over 20 years of expertise operating with PLL buildings to Enhanced Phase-Locked Loop constructions for energy and effort Applications, the one publication out there in particular devoted to PLL architectures as they practice to energy engineering. As know-how has grown and unfold to new units, PLL has elevated in importance for strength platforms and the units that connect to the ability grid. This ebook discusses the PLL buildings which are without delay acceptable to energy structures utilizing uncomplicated language, making it simply digestible for a large viewers of engineers, technicians, and graduate students.

Enhanced phase-locked loop (EPLL) has develop into the main greatly applied structure over the last decade, and lots of books lack clarification of the structural adjustments among PLL and EPLL. This ebook discusses these modifications and likewise offers targeted directions on utilizing EPLL for either single-phase functions and three-phase purposes. The book’s significant issues include:

  • A simple examine PLL and its typical structure
  • A complete clarification of EPLL
  • EPLL extensions and modifications
  • Digital implementation of EPLL
  • Extensions of EPLL to three-phase structures

Dr. Karimi-Ghartemani presents uncomplicated research that is helping readers comprehend all the constructions provided with no requiring complex mathematical proofs. His ebook is stuffed with illustrated examples and simulations that attach conception to the genuine international, making Enhanced Phase-Locked Loop buildings for strength and effort Applications a terrific reference for someone operating with inverters, rectifiers, and comparable technologies.

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Example text

This means that EPLL and ANF are different realizations of the same thing. Similar thing exists for different realizations of a digital filter for example. Each realization may have properties that the other one does not. Some realizations are for instance more robust for digital implementations as this is a well-known fact with digital infinite impulse response (IIR) filters. As for the EPLL, it is indeed a proven fact that it offers robustness features when compared with ANF and we will discuss it in Chapter 4.

16 Modified droop control method (MDCM). k converge to 0 meaning that Vm should converge to V ∗ − kqv Q. This means that the modification introduced by MDCM does not really change the essential properties of the DCM. It, however, offers an extra degree of freedom to finely tune the output voltage magnitude through the term kv . Further, the integrator improves the filtering properties of the loop. The H filters can be removed without causing noticeable impact on the loop behavior. 16, has great resemblance with the EPLL.

8. Choose Ui = 1, ωi = 120π , h0 = 400, and h1 = 20,000. Assume that a maximum peakto-peak ripple of 1◦ is allowed in the phase angle. a. Find the value of ωc analytically. b. Verify your answer by simulation. c. Based on the simulation, how long is the transient time of the system with this value of ωc ? 10 Pendulum system. 5 Consider the second-order LF of the form H(s) = h0 + hs1 + hs22 . a. Prove that a PLL with this LF can track the ramp variations of frequency with no steady state error. b.

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