The box type substation is composed of a transformer, a high voltage switch cabinet and a low voltage switch cabinet, and the high and low voltage switch cabinet is composed of various primary equipment and secondary equipment. Therefore, the maintenance of the box-type substation () is essentially the maintenance of primary and secondary equipment. So how to scientifically and effectively do the maintenance of primary and secondary equipment?
1. One equipment maintenance.
The primary equipment maintenance of the ordinary box-type substation is mainly based on the on-site inspection and background monitoring data of the operation and maintenance personnel. If it is a smart box type substation, because it is equipped with a variety of online monitoring equipment and operating environment monitoring equipment, it can always monitor the running status of the equipment once, and the fault can be issued for the first time. It not only improves efficiency, but also saves a lot of labor costs.
2. Secondary equipment maintenance.
The secondary equipment of the box-type substation senses the operating state of the primary equipment by measuring the low voltage and small current converted by the current transformer and the voltage transformer. When a device fails, the secondary device issues an alarm message or disconnects the electrical circuit isolation device of the system. In order to achieve this function, the secondary device must be directly connected to the current transformer and the secondary winding of the voltage transformer to form a closed loop.
In the box-type substation, the microcomputer relay protection is usually adopted to realize the control, protection and adjustment of the primary equipment. The closed loop is formed by the control element of the AJ equipment in the control cable or the signal device of the box substation. In the smart box type substation, the secondary monitoring equipment mainly uses digital equipment, which can transmit information to remote monitoring and protection equipment, which is convenient, fast and safe.
