作　　者： (时振堂）; (陈瑶）; (崔朝丽）; (陈科成）; (康忠健）;

机构地区： 中国石化大连石油化工研究院,辽宁大连116000

出　　处： 《电网与清洁能源》 2017年第7期13-18,共6页

摘　　要： 针对油田电网瞬时故障短时电压跌落引起的电机失压脱扣甩负荷现象,对考虑电压稳定性的油田电机-抽油机启动特性进行了理论分析;建立了符合油田电机-抽油机负荷实际运行特性的电磁暂态仿真模型,对电机-抽油机启动暂态特性进行了仿真验证。搭建了某油田下二门电网仿真模型,根据单井电机-抽油机不失稳极限启动残压以及配网机端电压不失稳极限持续时间对该油田电网制定了合理的考虑电压稳定性的油田电机-抽油机失压脱扣保护措施。仿真结果表明,该方法可有效防止电压瞬时跌落时非失稳电机失压脱扣甩负荷,并能够可靠切除失稳堵转电机。 In view of the phenomenon of the under voltage release and load rejection of motors caused by short-time voltage drop in oilfield power system transient fault, this paper firstly analyzes the starting characteristic of oilfield motor-pumping unit in theory considering voltage stability, then establishes the electromagnetic transient simulation model of oilfield motor-pumping unit in line with its actual operation characteristics, and verifies the starting characteristic of oilfield motor-pumping unit by transient simulation. In addition, a simulation model of Xiaermen power system of an oilfield is established, and the under voltage release protection measures considering voltage stability are proposed for the power system. The simulation result suggests that the proposed method is able to prevent non unstable motors from losing voltage and rejecting load and cut off unstable locked motors reliably.

关 键 词： 电压稳定性 电机 抽油机 启动特性 失压脱扣保护