Islanding detection scheme based on adaptive identifier signal estimation method
| Autor: | Gevork B. Gharehpetian, Mohsen Bakhshi, Reza Noroozian |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Engineering
business.industry 020209 energy Applied Mathematics 020208 electrical & electronic engineering 02 engineering and technology Power factor Frequency deviation AC power Signal Computer Science Applications Identifier Sampling (signal processing) Control and Systems Engineering Control theory 0202 electrical engineering electronic engineering information engineering Electronic engineering Islanding Electrical and Electronic Engineering Synchronous motor business Instrumentation |
| Zdroj: | ISA Transactions. 71:328-340 |
| ISSN: | 0019-0578 |
| DOI: | 10.1016/j.isatra.2017.08.020 |
| Popis: | This paper proposes a novel, passive-based anti-islanding method for both inverter and synchronous machine-based distributed generation (DG) units. Unfortunately, when the active/reactive power mismatches are near to zero, majority of the passive anti-islanding methods cannot detect the islanding situation, correctly. This study introduces a new islanding detection method based on exponentially damped signal estimation method. The proposed method uses adaptive identifier method for estimating of the frequency deviation of the point of common coupling (PCC) link as a target signal that can detect the islanding condition with near-zero active power imbalance. Main advantage of the adaptive identifier method over other signal estimation methods is its small sampling window. In this paper, the adaptive identifier based islanding detection method introduces a new detection index entitled decision signal by estimating of oscillation frequency of the PCC frequency and can detect islanding conditions, properly. In islanding conditions, oscillations frequency of PCC frequency reach to zero, thus threshold setting for decision signal is not a tedious job. The non-islanding transient events, which can cause a significant deviation in the PCC frequency are considered in simulations. These events include different types of faults, load changes, capacitor bank switching, and motor starting. Further, for islanding events, the capability of the proposed islanding detection method is verified by near-to-zero active power mismatches. |
| Databáze: | OpenAIRE |
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