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Resilient decentralised control of inverter-interfaced distributed energy sources in low-voltage distribution grids

机译：低压分布网格中的逆变器接口分布能源的弹性分散控制

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摘要

This study shows that a relation can be found between the voltage at the terminals of an inverter-interfaced renewable energy source (RES) and its optimal reactive power support. This relationship, known as volt-Var curve (VVC), enables the decentral operation of RES for active voltage management (AVM). Here the decentralised AVM technique is modified to consider the effects of the realistic operational constraints of RES. The AVM technique capitalises on the reactive power support capabilities of inverters to achieve the desired objective in unbalanced active low-voltage distribution systems (LVDSs). However, as the results show, this AVM technique fails to satisfy the operator's objective when the network structure dynamically changes. By updating the VVCs according to the system configuration and components' availability, the objective functions will be significantly improved and the AVM method remains resilient against the network changes. To keep the decentralised structure, the impedance identification capability of inverters is used to locally find the system configuration. Adaptive VVCs enable the decentralised control of inverters in an online setting. A real-life suburban residential LVDS in Dublin, Ireland, is used for showcasing the proposed method, and the effectiveness of the proposed resilient ACM technique is demonstrated.
机译：该研究表明，可以在逆变器连接的可再生能源（RES）的端子处的电压之间找到关系及其最佳无功功率支撑。这种已知为Vol-VAR曲线（VVC）的关系，使RES的分叉操作能够用于主动电压管理（AVM）。这里修改了分散的AVM技术，以考虑RES的现实操作系统的影响。 AVM技术大写逆变器的无功功率支撑能力，以在不平衡的有源低压分布系统（LVDS）中实现所需目标。然而，随着结果表明，这种AVM技术无法满足操作员当网络结构动态地改变时的目标。通过根据系统配置和组件的可用性更新VVC，客观功能将得到显着改进，AVM方法对网络变化保持弹性。为了保持分散的结构，逆变器的阻抗识别能力用于本地找到系统配置。 Adaptive VVCS在在线设置中启用对逆变器的分散控制。爱尔兰都柏林的真实郊区住宅LVDS用于展示所提出的方法，并证明了所提出的弹性ACM技术的有效性。

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