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首页> 外文会议>Conseil International des Grands Reseaux Electriques;International Council on Large Electric Systems;CIGRE session >Strategic Defence Plan for Oman-UAE Interconnected Power System
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Strategic Defence Plan for Oman-UAE Interconnected Power System

机译：阿曼-阿联酋互联电力系统战略防御计划

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摘要

The objective of this paper is to describe the various measures investigated to secure the behaviour ofOman-UAE interconnected power system when facing large disturbances. When occurring, the activation ofthe defence plan maintains or restores the stability of the interconnected system but also to limit thespreading of the disturbance or the instability phenomena to large portions of the power system. The maindefence plan and emergency actions of concern are:1. Defence actions against frequency instabilities which lead (most of the time) to the activation of the UnderFrequency Load Shedding (UFLS). The paper assesses the need to harmonize the two existing UFLSplans to avoid unnecessary power transfer during transients involving the activation of UFLS plans.2. Defence actions against loss of synchronism which could take place following various circumstances suchas the occurrence of faults with delayed clearing or uncontrolled development of undamped power swingsbetween various parts of the interconnected system. The most common loss of synchronism defence actionis the detection and splitting of the portion of the system that lost synchronism. In the frame of the Oman-UAE interconnection, it would consist of the disconnection of the interconnector or the portions of thesystem that would have lost synchronism.A large number of severe contingencies have been simulated to locate the coherent group of generatorsfollowing a loss of synchronism. These have been achieved by the simulation of 3-phase faults cleared inbackup time close to 220 kV substations leading to the loss of two circuits or one 220 kV circuit and onetransformer. The cases leading to the loss of synchronism of a set of generators have been detected. Thesecases should be addressed with adequately located and tuned out of step protections. In some situations thesystem splits into two or more coherent groups of generators. Simulations of faults cleared in backup timehave shown that in very unlikely Oman exporting situations, the transmission system or part of it may losesynchronism with respect to the UAE system.
机译：本文的目的是描述为确保行为安全而研究的各种措施。 阿曼-阿联酋电力系统互联时面临较大的干扰。发生时，激活 防御计划既可以维持或恢复互连系统的稳定性，又可以限制 将干扰或不稳定现象扩展到电力系统的大部分。主要的 防御计划和令人关注的紧急行动是： 1.针对频率不稳定性的防御行动，这种频率不稳定性在大多数情况下导致激活 频率减载（UFLS）。本文评估了协调两个现有UFLS的必要性 避免在涉及UFLS计划激活的瞬态过程中不必要的功率传输。 2.在各种情况下可能发生的防止同步丢失的防御措施 由于发生故障而导致延迟清除或无阻尼功率波动的不受控制的发展 在互连系统的各个部分之间。最常见的失去同步防御行为 是对失去同步的系统部分的检测和拆分。在阿曼的框架中- 阿联酋互连，将包括互连器的断开连接或部分连接的断开。 系统会失去同步性。 已模拟了大量严重的意外事件，以定位发电机的相干组 失去同步。这些是通过模拟清除的三相故障来实现的 备用时间接近220 kV变电站，导致两回路或一220 kV回路和一回路的损耗 变压器。已检测到导致一组发电机失去同步性的情况。这些 应对案件进行适当定位，并调整其失调保护范围。在某些情况下 系统分为两个或更多相干的发电机组。模拟备份时间清除的故障 表明在非常不可能的阿曼出口情况下，传输系统或其中的一部分可能会丢失 与阿联酋系统的同步性。

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