A New Hybrid Synchronization PLL Scheme for Interconnecting Renewable Energy Sources to an Abnormal Electric Grid

被引:5
|
作者
Alturki, Mansoor [1 ]
Abbassi, Rabeh [1 ,2 ,3 ]
Albaker, Abdullah [1 ]
Jerbi, Houssem [4 ]
机构
[1] Univ Hail, Coll Engn, Dept Elect Engn, Hail 81451, Saudi Arabia
[2] Univ Kairouan, Inst Appl Sci & Technol Kasserine ISSATKas, POB 471, Kasserine 1200, Tunisia
[3] Univ Tunis, Higher Natl Engn Sch Tunis ENSIT, LaTICE Lab, 5 Ave Taha Hussein,POB 56, Tunis 1008, Tunisia
[4] Univ Hail, Coll Engn, Dept Industr Engn, Hail 81451, Saudi Arabia
关键词
synchronization; phase locked loop (PLL); mixed second- and third-order generalized integrator (MSTOGI); delayed-signal cancellation (DSC); moving average filter (MAF); distorted grid conditions; MQT1-PLL; POWER CONVERTERS; SYSTEM; STABILITY; IMPLEMENTATION; DESIGN; FILTER;
D O I
10.3390/math10071101
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
Today, and especially with the growing interest in distributed renewable energy sources (DRESs), modern electric power systems are becoming more and more complex. In order to increase DRES penetration, grid side converter (GSC) control techniques require appropriate synchronization algorithms that are able to detect the grid voltage status as fast and accurately as possible. The drawbacks of the published synchronization phase-locked loop (PLL) techniques were structured mainly around the slow dynamic responses, the inaccuracy of extracting the fundamental components of the grid voltages when they contain a DC offset, and the worsening of the imbalance rejection ability facing significant frequency changing. This paper proposes a new synchronization PLL technique ensuring efficient and reliable integration of DRESs under normal, abnormal, and harmonically distorted grid conditions. The proposed PLL uses the mixed second- and third-order generalized integrator (MSTOGI) in the prefiltering stage through its adaptability to power quality and numerous grid conditions and its low sensitivity to input DC and inter-harmonics. Moreover, a modified quasi type-1 PLL (MQT1-PLL), which integrates two compensation blocks for phase and amplitude errors, respectively, has been used in the control loop. The discussion of sizing requirements and the effectiveness of the so-called MSTOGI-MQT1-PLL are tested under grid voltage imbalances and distortions and confirmed through simulation results compared to double second-order generalized integrator PLL (DSOGI-PLL), cascaded delayed signal cancellation PLL (CDSC-PLL), and multiple delayed-signal cancellation PLL (MDSC-PLL).
引用
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页数:21
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