Abstract

The operation of distribution systems benefits from an efficient voltage and reactive power control, which nowadays is generally achieved by local and independent actions performed by voltage regulators, on-load tap changer transformers, and capacitor banks. However, the modernization of distribution systems has been accompanied by the integration of a communication infrastructure and new controllable equipment allowing the development of innovative procedures to control the voltage and reactive power. In this context, an alternative is the implementation of an Integrated Volt/Var Control (IVVC), consisting of the integration of voltage and reactive power controls in a centralized structure. This work investigates a hierarchical Volt/Var control methodology that considers the use of both local and centralized controls in a coordinated manner aiming to optimize distribution system operation and overcome the disadvantages of using either of the approaches separately. In this methodology, the centralized control acts when the local control is not enough, overriding its commands. The methodology is tested in a distribution system with photovoltaic generators and considers the use of inverters’ advanced functions into the hierarchical control. The results show that the proposed methodology allows improvements in the performance of the test system operation increasing its efficiency.

摘要

配电系统的运行得益于有效的电压和无功功率控制，如今，这种控制通常是通过调压器，有载分接开关变压器和电容器组执行的局部和独立动作来实现的。但是，配电系统的现代化伴随着通信基础设施和新可控设备的集成，从而允许开发创新的程序来控制电压和无功功率。在这种情况下，一种替代方案是实施集成电压/无功控制（IVVC），其中包括将电压和无功功率控制集成在一个集中式结构中。这项工作研究了一种分层伏特/瓦尔控制方法，该方法考虑了以协调方式同时使用本地控制和集中控制，旨在优化配电系统的运行并克服了单独使用这两种方法的缺点。在这种方法中，集中控制在本地控制不足时起作用，从而覆盖其命令。该方法已在带有光伏发电机的配电系统中进行了测试，并考虑将逆变器的高级功能用于分层控制。结果表明，所提出的方法可以改善测试系统操作的性能，从而提高其效率。当本地控制不够时，集中控制将起作用，从而覆盖其命令。该方法已在带有光伏发电机的配电系统中进行了测试，并考虑将逆变器的高级功能用于分层控制。结果表明，所提出的方法可以改善测试系统操作的性能，从而提高其效率。当本地控制不够时，集中控制将起作用，从而覆盖其命令。该方法已在带有光伏发电机的配电系统中进行了测试，并考虑将逆变器的高级功能用于分层控制。结果表明，所提出的方法可以改善测试系统操作的性能，从而提高其效率。