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

By Masoud Karimi-Ghartema

Filling the distance available in the market devoted to PLL buildings for energy systems

Internationally well-known specialist 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 single e-book out there in particular devoted to PLL architectures as they practice to strength engineering. As expertise has grown and unfold to new units, PLL has elevated in importance for energy structures and the units that hook up with the ability grid. This e-book discusses the PLL buildings which are at once acceptable to energy structures utilizing easy 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 generally applied structure over the last decade, and plenty of books lack rationalization of the structural modifications among PLL and EPLL. This booklet discusses these ameliorations and in addition presents unique directions on utilizing EPLL for either single-phase purposes and three-phase purposes. The book’s significant subject matters include:

  • A easy examine PLL and its typical structure
  • A complete rationalization 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 buildings awarded with out requiring advanced mathematical proofs. His publication is stuffed with illustrated examples and simulations that attach conception to the true global, making Enhanced Phase-Locked Loop buildings for strength and effort Applications a great reference for an individual operating with inverters, rectifiers, and comparable technologies.

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Extra resources for Enhanced Phase-Locked Loop Structures for Power and Energy Applications

Sample text

The amplitude dynamics is a first-order dynamics with the time constant of τ = μ21 . A value of μ1 = 200, for example, corresponds to a time constant of 10 ms. • The phase/frequency dynamics is the same as the conventional PLL. Its modes are obtained from the characteristic equation 2 As compared to the analysis performed for PLL, we here have more justification to neglect the double-frequency terms in this analysis for EPLL because they approach 0. 2 Responses of EPLL (and PLL) to input signal frequency jump of 50–60 Hz.

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.

2 = 0) and μ1 = μ3 . 5. 15) where ωn is a constant and e = u − y = u − Uo sinφo . 5 LTI-EPLL structure. LINEAR TIME INVARIANT EPLL μs Y(s) = 2 . 16) Proof : Define the change of coordinates y = Uo sinφo and y⊥ = −Uo cosφo . Then, the differential equations transform to ˙ o sinφo + Uo φ˙ o cosφo = μe sin2 φo + Uo (ωn + y˙ = U μe cosφo ) cosφo Uo = −ωn y⊥ + μe, ˙ o cosφo − Uo φ˙ o sinφo = μe sinφo cosφo − Uo (ωn + y˙ ⊥ = U μe cosφo ) sinφo Uo = ωn y. 17) applies to this system. The following transfer functions are then held: Y(s) μs , = 2 E(s) s + ωn2 Y(s) μs , = U(s) s2 + μs + ωn2 Y ⊥ (s) μωn .

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