AD908MF工控备件
对控制台供电， 通常为AC220V。三相交流通过在线UPS进行整流、逆变、隔离变压过程后输出稳定的交流电，同时通过充电模块对电池充电，在三相交流停电时，电池的直流电经升压、逆变、隔离变压变为交流电，保证驱动、控制系统用电。UPS 功率要满足开关门时最大冲击功率要求。交流电通过AC/DC 模块提供控制系统用DC24V和DC110V，模块采用1+1备份；交流电通过AC/DC模块提供驱动系统用DC110V，模块采用N+1备份，驱动系统用AC/DC模块要满足开关门时最大冲击功率要求。
AD908MF工控备件三相交流AC380V 通过AC/DC模块输出DC110V。AC/DC模块分为两部分：一部分模块输出为电池充电并为DC110V 控制系统供电，此部分模块采用N+1 备份；另一部分模块输出为DC110V 驱动系统供电，此部分模块也采用N+1 备份。使用DC/DC模块，提供DC24V控制系统用电，模块1+1 备份。使用DC/AC 模块，提供AC220V 控制台用电，模块1+1 备份。在三相交流AC380V 停电时，电池直接对DC110V 驱动系统和DC110V 控制系统供电，并通过DC/DC 模块和DC/AC模块对DC24V控制系统和AC220V 控制台供电。两种电源方案的比较
（1）单点故障。交流方案采用单台UPS供电存在3个单点故障点，即电池、电池升压和逆变。直流方案只存在电池1个单点故障点。电池单点故障点通过双组电池备用可以消除。交流方案要消除单点故障需要UPS 1+1 备份。
（2）功率变换。由于驱动供电的特殊性（峰值功率要求高），交流方案在正常情况下需要经过2 级功率变换提供驱动供电，即AC/AC(UPS)和AC/DC 变换；直流方案只需要AC/DC 一级功率变换。综合评估，交流方案变换功率为直流系统的1.7倍以上；而变换功率的大小与成本密切相关；因此，直流方案的投资较小。
（3）电池备用的可靠性。交流方案电池后备供电需要经过电池升压、逆变和AC/DC模块对外供电，经过的电源变换环节多。直流方案电池直接对DC110V 供电，无变换环节。因此，直流方案电池后备更可靠。根据不同港口的类型特点和靠泊船只的用电需求，船舶岸电主要分为高压、低压两种供电类型，容量等级跨度也很大。
controller is arranged near the car barrier to locally control the lifting and lowering of the car barrier, and one substation controls one car barrier correspondingly. The fx3ga-24mr-cm programming port of the master station controller is connected to the HMI (tpc1061ti) in Kunlun on state to display the status information of each car barrier. The structure diagram of the whole control system is shown in Figure 1 below.
Due to the explosion-proof requirements of equipment used in coal mines, the whole system is composed of explosion-proof box, main control box, electric control box and operation box. The main control box is the main station, the electric control box is the sub station, and the operation box is equivalent to the upper computer. The main station and sub stations are connected by PLC communication of the same brand. Another communication port (fx3ga-24mr-cm programming port) of the main station is connected to the upper computer - Kunlun on state HMI (tpc1061ti). A delta small PLC (dvp14ss211t) is used in the operation box to collect panel key signals. Due to the requirements of isolation between intrinsically safe circuits and non intrinsically safe circuits in the explosion-proof design, the intrinsically safe key signals on the operation box panel are isolated and converted into non intrinsically safe signals before they are connected to the PLC (dvp14ss21t).
