مشخصات مقاله:
عنوان فارسی مقاله:
ژنراتورهای سنکرون مجازی برای هماهنگ سازی ولتاژ یک سیستم قدرت دیزلی فتوولتائیک هیبریدی
عنوان انگلیسی مقاله:
Virtual synchronous generators for voltage synchronization of a hybrid PV-diesel power system
کلمات کلیدی مقاله:
سیستم تولید ترکیبی، ژنراتور همزمان، همگام سازی ولتاژ، تقسیم قدرت
کلمات کلیدی انگلیسی:
Hybrid generation system – Virtual synchronous generator – Voltage synchronization – Power sharing
مناسب برای رشته های دانشگاهی زیر:
مهندسی برق
مناسب برای گرایش های دانشگاهی زیر:
ماشین های الکتریکی، برق قدرت، سیستم های قدرت
وضعیت مقاله انگلیسی و ترجمه:
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فهرست مطالب:
Abstract
Keywords
Nomenclature
1. Introduction
2. System structure and modeling
2.1. Real synchronous generator model
2.2. Virtual synchronous generator model
2.2.1. VSI model
2.2.2. PVG model
2.2.3. ESS model
3. Proposed synchronisation process and power sharing method
3.1. Synchronisation process
3.2. VSG-based control strategy
3.2.1. Power calculation
3.2.2. Virtual inertia
3.2.3. Virtual governor system
3.2.4. Virtual excitation voltage
3.2.5. References voltages generation
3.2.6. DG rotor initial position correction
3.3. Problems of Reactive Power Sharing in Hybrid system (PVG-DG)
4. Simulation results
5. Experimental results
5.1. Synchronization process experimental validation
5.2. Power sharing method experimental validation
6. Conclusion
Declaration of Competing Interest
References
قسمتی از مقاله انگلیسی:
1. Introduction
Various hybrid power generation systems based on diesel generators have been used widely in several applications. The integration of renewable energy sources (RES) such as PV and wind into this type of hybrid energy system have been a focal point, while the synchronization process of these hybrid systems, connected to the main utility grid through Voltage Source Inverter (VSI), has been indexed as one of the major stability issue. To ensure the synchronization process a phase-locked loop (PLL) is generally used to estimate the angular frequency of the point of common coupling (PCC). However, the DG rotor inaccessibility imposes a slave operation mode of the VSI and a master operation mode of the DG as illustrated by Fig. 1. Since a stand-alone microgrid with a small system inertia is vulnerable to the output power fluctuations of intermittent renewable generation systems [1], the DG master operation mode entails the following drawbacks: • The PLL stability is affected by the DG transients [2]. • Oscillations appearance during the sources synchronization. These oscillations are predicted from the power-angle curve concept interacting with the DG rotary inertia. This will therefore affect the overall system stability [3]. In this context, this paper proposes a new control strategy based on Virtual Synchronous Generators (VSG) for a hybrid PVG-DG power system in a stand-alone context. This control concept consists in emulating the VSI operation by a synchronous machine. This makes it possible to ensure synchronization at PCC without using a PLL [4] and limits the above-mentioned drawbacks [5]. In the literature, the VSG concept was proposed and studied by many researchers quite recently [6]. Main research works were mainly focused towards its application and the stability analysis [7–9]. The VSG concept has been well investigated with different practical implementations [10–12].