基于相量的功能在降低系统强度的高压直流控制中的应用

Mohammad Amin Golshani, D. Wilson, S. Norris, I. Cowan, Md Rahman, B. Marshall
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引用次数: 1

摘要

电力电子变流器的控制和稳定性与其所连接系统的强度密切相关。传统上,同步电机在电网中提供了很大一部分电压控制的强度或“刚度”,但越来越多的大型电力电子变流器在电网的偏远地区取代了这种同步发电机。在远程连接点,如果线路或发电机跳闸,网络很容易受到系统强度大变化的影响。因此,设计电力电子控制以在广泛的系统运行条件下保持稳定是具有挑战性的。本文的目的是演示使用相量测量单元(PMU)数据来导出网络状态的实时指标的能力。这些交流网络状态指标可以通过高压直流(HVDC)控制来选择合适的运行模式。本文介绍了所开发的基于相量的控制方案及其功能模块的详细信息。控制方法将系统强度的直接指示与系统减弱结果的其他指示结合起来。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
APPLICATION OF PHASOR-BASED FUNCTIONALITY TO HVDC CONTROL IN REDUCED SYSTEM STRENGTH
The control and stability of power electronic converters are strongly related to the strength of the system to which they are connected. Traditionally, synchronous machines have provided a large share of the strength or “stiffness” of voltage control in the grid, but increasingly there are large power electronic converters in remote areas of the grid displacing this synchronous generation. At remote connection points, the network is susceptible to large changes in system strength if lines or generators trip. It is therefore challenging to design power electronic controls to remain stable over a wide range of system operating conditions. The purpose of this paper is to demonstrate capabilities to use Phasor Measurement Unit (PMU) data to derive real-time indicators of the state of the network. These indicators of AC network state can be used to select an appropriate mode of operation by the High-Voltage Direct Current (HVDC) control. This paper describes the developed phasor-based control solution and details of its functional blocks. The control approach combines direct indication of the system strength with other indicators of the outcomes of a weakening system.
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