1000MW机组直流系统设计和运行问题分析及处理  

Analysis and Treatment on Design and Operation of DC System of 1000MW Unit

作　　者：吴春 

机构地区：[1]广东大唐国际潮州发电有限责任公司,广东潮州515723

出　　处：《广东电力》2011年第3期43-46,共4页Guangdong Electric Power

摘　　要：对在直流系统运行中可能出现的交流窜入直流造成保护装置大面积误动以及厂用电失去时缺少足够容量的直流电源保证汽轮机和分散控制系统(distributed control system,DCS)供电等问题进行分析,并提出在设计阶段合理设计厂用电系统,将重要设备与辅助设备直流系统隔开;正确选择跳闸继电器;正确使用检修电源、仔细检查试验仪器并做好交、直流回路标识;依据电厂实际情况校核蓄电池容量;实现动力蓄电池的双机冗余配置等措施。The paper analyzes such problems as extensive false tripping caused by potential interlarding of Alternating current in direct current and scarcity of DC power with sufficient capacity for steam turbines and distributed control system（DCS） under the circumstance of loss of auxiliary power.Besides,The paper proposes such measures as reasonable design of auxiliary power system in the design process,separation of DC systems of important equipments and auxiliary equipments,proper choice of tripping relays,proper use of maintenance power,careful and thorough examination of test instruments and labeling of DC/AC circuits,checking of battery capacity in accordance with the reality in power plant and duplex redundancy configuration of traction battery.

关 键 词：直流系统 分散控制系统 防范措施 

分 类 号：TM63[电气工程—电力系统及自动化]