Power utilization parallelism allowing device for outdoor station of transformer substation

The invention relates to a transformer substation outdoor station power utilization parallelism allowing device which comprises a power supply conversion module, a sampling isolation conditioning difference calculation circuit module and a single-chip microcomputer module. According to the invention, a monitoring function before voltage paralleling can be realized, and whether indoor and outdoor station transformers are in the same phase and whether closing can be carried out can be measured and calculated before paralleling; safety anti-misoperation protection is provided for voltage paralleling field operation and maintenance, indication and alarm are provided at the same time, and misoperation events during voltage paralleling can be effectively eradicated. 本发明涉及一种变电站户外站用电并列允许装置，包括电源变换模块、采样隔离调理差分计算电路模块、单片机模块；本发明能实现电压并列前的监控功能，在并列前测算出户内和户外的站用变是否为同相位，能否合闸；不仅为电压并列现场操作、检修提供安全防误保护，同时提供指示及报警，能有效的杜绝电压并列时的误操作事件。