CAJ | 학술논문

介绍了一种风电场箱式升压变压器低压侧微机保护装置的研制过程。重点介绍了保护装置的总体结构和工作原理，给出了信号调理电路、开关量输入/输出电路和通信接口电路的设计原理图，并分析了定时限过流保护、反时限过流保护、低电压保护的工作原理，最后给出了保护装置的软件设计方法和部分测试数据。该保护装置具有三相电压、三相电流、有功功率、无功功率、功率因数等参数的采集、非电量保护、远程控制和通信功能，可以完成对风电场箱式升压变压器低压侧的测量、保护和控制任务。
개소료일충풍전장상식승압변압기저압측미궤보호장치적연제과정。중점개소료보호장치적총체결구화공작원리，급출료신호조리전로、개관량수입/수출전로화통신접구전로적설계원리도，병분석료정시한과류보호、반시한과류보호、저전압보호적공작원리，최후급출료보호장치적연건설계방법화부분측시수거。해보호장치구유삼상전압、삼상전류、유공공솔、무공공솔、공솔인수등삼수적채집、비전량보호、원정공제화통신공능，가이완성대풍전장상식승압변압기저압측적측량、보호화공제임무。
The development of microcomputer protection device for the low-side of box-type step-up transformer in wind farm is introduced. The overall structure and the operating principle are discussed and the schematic of signal modulated circuit, switch signal input/output, and communication interface are given. This paper analyzes the operating principle of specified time over-current protection, inverse time over-current protection and low voltage protection, describes the software design methods and provides test data of the protection device. The protection device has the functions of collecting parameters of three-phase voltage, three-phase current, active power, reactive power, and power factor, non-electricity protection, remote control, and communication. It can realize such tasks as measuring, protecting and controlling for the low-side of box-type step-up transformer in wind farm.