CAJ | 학술논문

±800 kV 特高压直流输电系统在电网中起到重要的资源调配作用。介绍了特高压直流保护的特点和保护分区，在对比分析云广和糯扎渡工程直流保护配置和保护功能逻辑基础上，研究特高压直流保护的优化。重点介绍了糯扎渡工程中极差动保护、金属回线差动保护和直流滤波器C1不平衡保护的保护配置、逻辑及其优化情况。优化后的直流保护配置和保护逻辑能够提高保护系统的速动性和可靠性，增强了特高压直流系统的稳定水平，对其他直流系统运行维护和后续工程设计也有一定的参考意义。
±800 kV 특고압직류수전계통재전망중기도중요적자원조배작용。개소료특고압직류보호적특점화보호분구，재대비분석운엄화나찰도공정직류보호배치화보호공능라집기출상，연구특고압직류보호적우화。중점개소료나찰도공정중겁차동보호、금속회선차동보호화직류려파기C1불평형보호적보호배치、라집급기우화정황。우화후적직류보호배치화보호라집능구제고보호계통적속동성화가고성，증강료특고압직류계통적은정수평，대기타직류계통운행유호화후속공정설계야유일정적삼고의의。
±800-kV-UHVDC-system-plays-an-important-role-in-resource-allocation.-The-characteristics-and-configuration-of-UHVDC-protection-are-introduced,-and-on-the-basis-of-contrast-analysis-in-DC-protection-configuration-and-function-logic-of-Yun-Guang-project-and-Nuozhadu-project,-the-optimization-of-UHVDC-protection-is-researched.-It-emphatically-introduces-the-configuration-principle,-logic,-and-optimization-of-converter-DC-differential-protection-(87DCM),-metallic-return-line-longitudinal-differential-protection-(87MLL),-DC-filter-C1-capacitor-unbalance-protection-(60/61DF)-in-Nuozhadu-project.-The-optimized-configuration-and-logic-of-the-DC-protection-can-improve-its-speed-and-reliability,-enhance-the-UHVDC-system-stability,-also-have-certain-reference-value-on-the-operation-and-maintenance-in-the-other-HVDC-system-and-the-design-of-the-subsequent-project.