CAJ | 학술논문

∶小型水电站主变保护动作后，因电气一次主接线形式简单及保护配置不满足选择性的要求，导致主变低压侧6 kV母线失压，使该母线所带重要负荷停电。通过对该水电站电气一次主接线形式及一、二次设备现状的分析探讨，提出改变电气一次主接线形式、增加主变低压侧开关，以及完善继电保护和安全自动装置配置等几种经济可行、符合实际、可保证6 kV母线安全供电的改造方案，并对方案实施可能存在的问题进行分析，以提高用户的供电可靠性。
∶소형수전참주변보호동작후，인전기일차주접선형식간단급보호배치불만족선택성적요구，도치주변저압측6 kV모선실압，사해모선소대중요부하정전。통과대해수전참전기일차주접선형식급일、이차설비현상적분석탐토，제출개변전기일차주접선형식、증가주변저압측개관，이급완선계전보호화안전자동장치배치등궤충경제가행、부합실제、가보증6 kV모선안전공전적개조방안，병대방안실시가능존재적문제진행분석，이제고용호적공전가고성。
After protection action of main transformer of a small hydropower station, an important load on 6kV busbar of main transformer low voltage side was dropped out of power due to the no-voltage failure of the busbar resulting from the simple electrical main wiring form and the unsatisfactory selectivity of protection configuration. A serial of e-conomic and practical improvement schemes, such as changing of electrical main wiring form, increasing switches at the main transformer low voltage side as well as improving the configuration of relay protection and automatic safety device, were proposed through the analysis on the electrical main wiring form as well as the status of primary and sec-ondary equipments. Besides, the possible problems in implementation of these schemes were also analyzed to improve the power supply reliability.