6AV6647-0AE11-3AX0

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6AV6647-0AE11-3AX0

 很长时间以来，变电站继电保护交直流串扰问题就一直存在于变电站中，并且直观地说，我们并没有一个能够完美解决它的办法，大多数时候在实际操作时，为了避免事故的时常发生，会安排经验丰富的工作人员去负责这一块的工作，但是这样的做法并不能完全使得事故不再发生，因此也不是可靠的选择。本文的观点是将直流电源不可替代的作用发挥出来，用它替代交流电源来作为继电保护电源，下面是本文作者想出来的两种方案。
将驱动设备进行更换。更换驱动设备，即將交流的设备更换为直流的，交直流电源串扰问题的主要原因是直流与交流同时存在而引起的，因此如果将交流设备都换成直流的设备，可以很有效的解决串扰问题，但是在另一方面，直流设备在市场上的流量很小，因此购买变得异常困难，并且因为没有较大的交易量，因此这种专业上的人员特别少，造成维修的困难与昂贵；还有就是如果直流设备直接接入直流电源直流系统，会使得直流接地的情况发生的更为频繁，因此在这方面要多加注意。
将直流电源进行逆变。所谓的逆变，是一种应用逆变器进行处理的方式方法，将二百二十伏的直流电逆变为二百二十伏的交流电，然后用于照明灯设备的使用。因为交流线路越长，危险和事故越容易发生，因此逆变器可以直接装在直流电源设备的接口处，可以完全杜绝电源串扰问题的发生。在以上解决方法的说明中，逆变器偶尔也会存在一些问题，毕竟其依旧存在交流侧，因此，可以进行一定的保护，如安装一些保护设备，有效地避免所有交直流问题的产生。在逆变器技术的开发和利用上面，我国的技术已经领先于世界，所以这种方法在一定程度上具有很强的实用性，也因为成本低而符合现阶段我国的国情。

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选择深圳长欣，选择放心，售后无忧大量现货，当天顺丰发货！
主营：本特利，英维思，伍德沃德，福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐，ACSO，力士乐等各大品牌的DCS系统配件，机器人系统配件，大型伺服系统备件。

先介绍几点经验。
1、先通读一遍“系统手册”（不管能不能看懂，先了解个大概，以便学习编程时查找）；
2、由位控逻辑入手，逐渐增加定时、计数等条件，把或、与、非关系理顺；
3、进而练习整数运算、实数运算、类型转换；
4、量程转换、PID调节回路的建立及P、I、D参数的理解（最好是有个物理回路验证，比如变频器+电机+测速传感器）；
5、循环、顺序、跳转等程序控制（尽量避免跳转，非跳不可时也是跳的越近越好）；
6、中断、通讯、位置控制....

本人以ABB工业机器人配件DSQC系列和Motorola MVME系列，GE 卡件 模块 驱动器系列为主攻。各位电工朋友可根据自己的条件选择适合自己的PLC品牌，由于PLC的基本框架大同小异，学会一种至于其它的学习起来也就简单了。

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