Study and Development of Anti-Islanding Control for Grid-Connected Inverters

Abstract

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Problems in the Classic Frequency Shift Islanding Detection Methods Applied to Energy Storage Converters and a Coping Strategy

“…Since i qref is independent of f, (11) can also be written as dθ con /df = dθ con /d(i qref +i per ) • di per /df. (12) As shown in Fig. 2 and Fig.…”

“…Two famous ones are Sandia Frequency Shift (SFS) and Slip-Mode Frequency Shift (SMS), which belong to frequency shift methods and have been the classic active islanding detection methods up to the present day [1]- [6]. In addition, [7] and [8] proposed two methods based on the relationships between reactive power and frequency; [9] and [10] added a reactive power perturbation on the basis of SMS and SFS; [11] proposed a method based on a relationship between active power and voltage; [12] proposed the concept of perturbing reactive current, and [13]- [15] realized and tested it. Although new methods are constantly emerging, SFS and SMS are still being widely used.…”

Transmission System Performance Analysis for High-Penetration Photovoltaics

“…Consistent with Ye et al [3], the peak scenario s3 assumed that PV takes the load increase over future years. That is, the load was increased to match the PV generation.…”

Islanding Detection Method for Multi-Inverter Distributed Generation

“…Positive feedback with d-q current control based family of islanding detection methods is presented in [12] and [13]. These methods consider the relation between the active (P) and reactive (Q) powers with the voltage magnitude (V) and frequency (f) as shown in (4) and (5), and the effects of current magnitude and angle deviation on the output active and reactive powers.…”