海上石油平台电力系统自励磁研究  

Study on Generator Self-Excitation in Offshore Oil Platform Power System

作　　者：张国民[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《计算机仿真》2012年第2期305-309,共5页Computer Simulation

基　　金：国家重点基础研究发展计划(2009CB219706)

摘　　要：研究海上石油平台的电力系统抑制自励磁优化控制问题,当海上石油平台孤岛电力系统黑启动时,由于海缆距离长、分布电容大,易造成发电机的自励磁现象,对系统的电气设备产生极大危害,影响了系统的安全。而应用在陆地电力系统的抑制自励磁措施并不能在孤岛电力系统中完全有效。针对海上石油平台电力系统的特点,提出三种应用在海上油田群电力系统的抑制自励磁方法,即双机带空载海缆黑启动、防止新接入的海缆长度超过临界长度以及并联电抗器黑启动。首先通过同步发电机电枢反应原理分析了同步发电机产生自励磁现象,以劳斯判据来确定产生同步自励磁时发电机参数的判断依据及条件,对某海上油田群电力系统的自励磁情况提出抑制模型,最后利用PSCAD/EMTDC软件对黑启动方案进行仿真,结果证明了方法的有效性,为设计提供了可靠依据。When the offshore oil platform power system black - start, submarine cables for long - distance need to put in, the self- excitation of generator happen easily, which is bad to generator and other electrical equipments. But analyzing and inhibiting measures of self - excitation for land power system are not fit for island power system. According to the characteristics of offshore oil platform power system, the paper presented a suitable method for the offshore oil platform power system to restrain generator self - excitation. First, the paper introduced the basic principle and criterion of synchronous generator＇s self - excitation based on armature reaction of synchronous generator. The Louts criterion was used to get judgment basis and conditions of generator parameter in producing synchronous self - excitation. In one offshore oil platform power system, for example, the measures was posed through analysis of self - excitation in the offshore oil platform power system. Then the black - start path was simulated and calculated by PSCAD/EMTDC. The computer simulation result illustrates the effectiveness of the proposed method.

关 键 词：孤岛电力系统 黑启动 自励磁 

分 类 号：TM31[电气工程—电机]