Grid operators face challenges with the increasing integration of wind energy into electric grids, necessitating uninterrupted wind power generation during outages to maintain system stability. Due to voltage dips there is a significantly impact on grid-connected doubly fed induction generators (DFIGs). Hence, integrating DFIG with grid battery storage system (GBSS) is to provide essential active and reactive power support at the point common coupling (PCC), aligning requirement of low voltage ride through (LVRT), and other services to the electric grid. The article proposes and experimentally validates a coordinated control scheme between the grid side converter (GSC) of the DFIG and the GBSS. In this dynamic adjustment of power set points within the outer control loop responds to voltage and frequency changes at the PCC. The control scheme facilitates multiple services to grid by seamless plug-and-play functionality between DFIG and GBSS converters. The proposed method, utilizing GBSS, achieves significant voltage improvement and enhanced reactive power injection, while effectively managing stator voltage, rotor-side converter current, and dc link voltage oscillations. The study incorporates hardware-in-the-loop (HIL) testing using real-time digital simulator (RTDS) with hardware setup of 2.5 kW dc motor emulating a wind turbine interconnected via power amplifier (PA). Simulation and experimental results demonstrate the effectiveness of proposed coordinated control scheme indicating its potential significance in grid conditions by withstanding voltage dips and load variations.

中文翻译：

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具有电网支持电池存储系统的双馈风力发电机


随着风能越来越多地融入电网，电网运营商面临着挑战，需要在停电期间不间断风力发电以维持系统稳定性。由于电压骤降，对并网双馈感应发电机 (DFIG) 产生了显着影响。因此，将 DFIG 与电网电池存储系统 (GBSS) 集成，旨在为公共耦合点 (PCC) 提供必要的有功和无功功率支持，满足低电压穿越 (LVRT) 的要求以及对电网的其他服务。本文提出并实验验证了 DFIG 网侧变流器 (GSC) 与 GBSS 之间的协调控制方案。在这种动态调整中，外部控制环内的功率设定点响应 PCC 处的电压和频率变化。该控制方案通过 DFIG 和 GBSS 转换器之间的无缝即插即用功能，促进多种电网服务。所提出的方法利用 GBSS，实现了显着的电压改善和增强的无功功率注入，同时有效管理定子电压、转子侧转换器电流和直流链路电压振荡。该研究将使用实时数字模拟器 (RTDS) 的硬件在环 (HIL) 测试与 2.5 kW 直流电机的硬件设置相结合，模拟通过功率放大器 (PA) 互连的风力涡轮机。仿真和实验结果证明了所提出的协调控制方案的有效性，表明其在承受电压骤降和负载变化方面在电网条件下的潜在重要性。