Robust Frequency Control of Microgrids Using an Extended Virtual Synchronous Generator
Robust Frequency Control of Microgrids Using an Extended Virtual Synchronous Generator
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DOI：
10.1109/tpwrs.2018.2850880
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发表时间：
2018-11-01
影响因子：
6.6
通讯作者：
Bevrani, Hassan
中科院分区：
文献类型：
--
作者：
Fathi, Abdolwahhab;Shafiee, Qobad;Bevrani, Hassan
将逆变器接口分布式发电机（dg）通过微电网集成到传统电力系统中，降低了系统的总惯性和阻尼特性，同时增加了系统的不确定性和对故障的敏感性。虚拟同步发电机（VSG）的概念最近在文献中被引入作为一种解决方案，它模仿了大型电力系统中传统同步发电机的行为。VSGs的参数通常是通过比较传统同步发电机来确定的。本文介绍了一种扩展的微电网VSG，它结合了虚拟转子、虚拟一次和虚拟二次控制的概念，作为稳定/调节系统频率的虚拟控制器。提出了一种h∞鲁棒控制方法，用于虚拟参数的鲁棒最优整定。通过微电网试验台验证了所提控制方法的有效性。
Integration of inverter-interfaced distributed generators (DGs) via microgrids into traditional power systems reduces the total inertia and damping properties, while increasing uncertainty and sensitivity to the fault in the system. The concept of the virtual synchronous generator (VSG) has been recently introduced in the literature as a solution, which mimics the behavior of conventional synchronous generators in large power systems. Parameters of the VSGs are normally determined comparing the conventional synchronous generators. This paper introduces an extended VSG for microgrids by combining the concept of virtual rotor, virtual primary, and virtual secondary control as a virtual controller to stabilize/regulate the system frequency. An H-infinity robust control method is proposed for robust\optimal tuning of the virtual parameters. The effectiveness of the proposed control methodology is verified via a microgrid test bench.