中国照明电器

文章深入分析了现代照明负荷的电气特性及其对保护系统的影响，指出高幅值涌流易导致保护装置误动，而谐波电流则会增加系统损耗并影响保护灵敏度。并在此基础上，系统研究了照明配电系统高低压侧的保护配置策略。在高压侧，重点分析了变压器保护中熔断器与负荷开关的配合选型、微机综合保护装置的应用及零序电流保护的灵敏度校验。在低压侧，着重探讨了断路器三段式保护的整定原则、上下级选择性配合、剩余电流保护配置及中性线断线保护策略。

This paper conducts an in-depth analysis of the electrical characteristics of modern lighting loads and their impact on protection systems,highlighting that high-amplitude inrush currents can easily cause misoperation of protection devices,while harmonic currents increase system losses and affect protection sensitivity.Based on this,the paper systematically studies the protection configuration strategies for the high and low voltage sides of lighting distribution systems.On the high-voltage side,it focuses on the coordination selection of fuses and load switches in transformer protection,the application of microcomputer integrated protection devices,and the sensitivity verification of zero-sequence current protection.On the low-voltage side,it emphasizes the setting principles of three-stage protection for circuit breakers,the selective coordination between upper and lower levels,the configuration of residual current protection,and the protection strategy for neutral line disconnection.