An Investigations on Design Dynamics of Synchronverter for P, Q and Frequency Control

S. P. Gawande, Pranjali M. Meshram, P. Chaturvedi, M. Daigavane
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Abstract

As the level of Distributed Generation grows, the effect of low inertia and damping increases and shows impact on the system strength and dynamic execution. A solution for improving performance of such a grid is to use a Virtual Synchronous Generator (VSG) named as Synchronverter. Synchronverter is constructed employing short-term energy storage, a power inverter and an appropriate control mechanism. The purpose of synchronverter is to imitate the behavior of Synchronous Generator (SG). This paper emphasizes on design dynamics of synchronverter. To achieve this, all the dynamics of SG are executed in synchronverter with the proper utilization of swing equation to exhibit the satisfactory control operation. Synchronverter allows AC structure to be operated without the need for a spinning machine. All of the synchronous machine functionality, such as frequency and voltage regulation, real and reactive power control are preserved. The system performance is tested and demonstrated in steady state as well as step change mode. The excitation and inertia requirements are fulfilled using solar Photovoltaic (PV) with DC link capacitor. The control approach is validated using simulation and experimental studies.
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P、Q、频率同步器设计动力学研究
随着分布式发电水平的提高,低惯性和阻尼的作用越来越大,并对系统强度和动态执行产生影响。提高这种电网性能的一种解决方案是使用名为Synchronverter的虚拟同步发电机(VSG)。同步器采用短期储能、功率逆变器和适当的控制机构构成。同步器的目的是模仿同步发电机(SG)的行为。本文重点研究了同步器的设计动力学。为了实现这一目标,SG的所有动力学都在同步器中进行,并适当地利用摆动方程来实现令人满意的控制操作。同步器允许交流结构运行,而不需要纺纱机。所有同步机的功能,如频率和电压调节,实际和无功功率控制被保留。在稳态和阶跃变化模式下对系统性能进行了测试和论证。采用带直流链路电容的太阳能光伏(PV)来满足励磁和惯性要求。通过仿真和实验验证了该控制方法的有效性。
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