特高压交流系统变压器继电保护配置与整定

结合目前国内已经投运的特高压输电工程，对特高压变压器特点、励磁涌流识别方案、主变及调压补偿变的继电保护配置以及整定进行研究，提出特高压变压器各套保护的主保护与后备保护的具体配置方案。界定各差动保护的功能及保护范围，保证保护方案能可靠动作，并给出各差动保护之间的配合整定建议。同时对典型故障进行动模试验，论证保护方案的可行性。本方案已在华东地区1 000 kV变压器保护中获得应用，可以为其他特高压交流工程中变压器继电保护的设计提供参考依据。

Disposition and Settings of Transformer Relay Protection in UHVAC System

Based on the operating experience of UHV transmission lines built in China, this paper studied the features of UHV transformer, the identification scheme for inrush current, the disposition and setting of relay protection for main transformer and voltage regulation compensation. Specific disposition schemes for both main protection and backup protection of each set of UHV transformer protection were proposed, also the function and range of each differential protection were defined to make sure that this protection scheme could reliably act on various types of failures happened in transformer. And then, the coordinate setting proposals were given and the feasibility of this proposed protection scheme had been proved by experiments on typical faults. The scheme has been successfully applied in 1 000 kV transformer protection in East China, which provides important references for the design of transformer relay protection in other UHVAC projects.