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首页> 外文期刊>Electric power systems research >Rule-based adaptive control strategy for grid-forming inverters in islanded power systems for improving frequency stability
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Rule-based adaptive control strategy for grid-forming inverters in islanded power systems for improving frequency stability

机译：基于规则的基于固定的自适应控制策略，用于提高频率稳定性的电力系统中的电网形成逆变器

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摘要

Operating isolated power systems with increasing shares of renewable energy sources requires the integration of battery energy storage systems in order to assure enhanced frequency regulation capabilities. The control mode of power converters interfacing battery energy storage systems to the grid can be based on grid-forming type structures given its superior performance with respect to the mitigation of network frequency disturbances. Nevertheless, in case of network faults, the interactions between existing synchronous units and the grid-forming type converters may adversely affect the global system behavior. Therefore, this paper addresses the study-case of a MW-scale isolated power system with large shares of converter-interfaced renewable generation, operating with both synchronous machines and a grid-forming type power converter. An optimal grid-forming control parameter tuning procedure considering different disturbances is presented, aiming to reduce the associated battery energy storage system power regulating effort following the disturbances. Moreover, it is proposed and discussed the need of a novel rule-based adaptive control solution to switch between different sets of control parameters used in grid-forming type converters depending on the network status following a fault-type disturbance. Extensive numerical simulations performed over different operating scenarios illustrate the performance of the proposed solution.
机译：随着可再生能源股份的增加，操作隔离电力系统需要集成电池储能系统，以确保增强的频率调节功能。电力转换器的控制模式可以基于相对于网络频率干扰的缓解，基于电网形成型结构。然而，在网络故障的情况下，现有同步单元与网格形成类型转换器之间的相互作用可能会对全球系统行为产生不利影响。因此，本文解决了MW尺度隔离电力系统的研究表壳，具有大份转换器接口可再生生成，与同步机和形成电网形成电源转换器。考虑到不同干扰的最佳网格形成控制参数调谐过程，旨在减少干扰后的相关电池储能系统功率调节力。此外，提出并讨论了新的基于规则的自适应控制解决方案，以根据故障类型干扰后的网络状态在网格形成类型转换器中使用的不同控制参数组之间切换。在不同的操作场景上执行的广泛数值模拟说明了所提出的解决方案的性能。

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