An Adaptive Synchronous-Reference-Frame Phase-Locked Loop for Power Quality Improvement in a Polluted Utility Grid

By Francisco José González-Espín, Emilio Figueres, Gabriel Garcerá. IEEE transactions on industrial electronics (1982. Print), 2012

304 citations recorded by the source corpus.

The proper operation of grid-connected power electronics converters needs using a synchronization technique to estimate the phase of the grid voltage. The performance of this synchronization technique is related to the quality of the consumed or delivered electric power. The synchronous-reference-frame phase-locked loop (SRF-PLL) has been widely used due to its ease of operation and robust behavior. However, the estimated phase can have a considerable amount of unwanted ripple if the grid voltage disturbances are not properly rejected. The aim of this paper is to propose an adaptive SRF-PLL which strongly rejects these disturbances even if the fundamental frequency of the grid voltage varies. This is accomplished by using several adaptive infinite-impulse-response notch filters, implemented by means of an inherently stable Schur-lattice structure. This structure is perfectly suited to be programmed in fixed-point DSPs (i.e., it has high mapping precision, low roundoff accumulation, and suppression of quantization limit cycle oscillations). The proposed adaptive SRF-PLL has been tested by means of the TI TMS320F2812 DSP. The obtained experimental results show that the proposed synchronization method highly rejects the undesired harmonics even if the fundamental harmonic frequency of a highly polluted grid voltage abruptly varies.

Subfields: Control and Systems Engineering, Electrical and Electronic Engineering, Energy Engineering and Power Technology

View Paper: https://www.semanticscholar.org/paper/db6fa557367a9c0dfe6323a64522dcc8da2d8257

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Control and Systems Engineering

1. José Matas
2. Josep M. Guerrero

In Electrical and Electronic Engineering

1. Abdullah M. Abusorrah
2. José Matas
3. Josep M. Guerrero

Citations in the corpus

• A Family of Gradient Descent Grid Frequency Estimators for the SOGI Filter (2018, background): “There are several ways of obtaining the grid parameters reported in the literature for single-phase and three-phase systems, which can be grouped into frequency and time domain methods [8]–[19].”
• Three-Phase PLLs: A Review of Recent Advances (2017, unknown): “This advantage, of course, is at the cost of a rather considerable increase in the PLL computational effort [18].”