PPD512 ABB 提供两种I/O-快速和慢速

PPD512 A10-15000 3BHEO40375R1023 ABB技术规格
ABB PPD512A10-454000
提供两种I/O-快速和慢速。而快速I/O系统涵盖读写操作缓慢的I/O系统需要不到1毫秒的时间来覆盖速度1毫秒以上。快速I/O系统是AC 800PEC专用的，使用的是设备仅通过光纤链路连接，并带来与电气概念相比，具有显著优势:
控制器和I/0设备之间的快速通信
抗电磁干扰能力强
无电势连接，使变送器隔离

PPD512

自并励静止励磁系统是励磁功率取自静止交流电压源，经静止换流整流后再通过滑环和电刷输入到发电机转子励磁绕组的励磁方式，励磁功率取自静止交流电压源，经静止换流器整流后再通过滑环和电刷输入到发电机转子励磁绕组的励磁方式，系统包括励磁变压器和可控或不可控的整流装置，交流励磁功率可以取自发电机端，或厂用变的母线，或同步发电机内的独立绕组。
励磁系统是发电机组重要设备，主要作用是调节励磁，以维持定子电压稳定，合理分配各台机组间无功功率，在发生短路时，强行励磁以提高系统动态稳定能力、提高输送功率极限、扩大静态稳定运行的范围。励磁系统对提高发电厂的自动化水平、发电机组运行的可靠性、电力系统的稳定性有着重要的作用。随着现代科学技术的发展，励磁方式已从直流电机励磁发展到可控硅励磁，在微机自并励静止可控硅整流励磁系统中，发电机的励磁电流是电机端的励磁变压器经过可控硅整流装置警流后供给，自动励滋调节器直接调节发电机的励磁电流以实现自动调整发电机机端电压或无功功率，这种励磁系统具有调节速度快、调节精度高的特点，已成为励磁系统发展的主流

PPD512

PPD512 A10-15000 3BHEO40375R1023 ABB technical specifications
ABB PPD512A10-454000
Two types of I/O are available – fast and slow. Fast I/O systems covering read and write operations slow I/O systems take less than 1 millisecond to cover speeds of more than 1 millisecond. The fast I/O system is dedicated to AC 800PEC, using devices connected only via fiber optic links, and brings significant advantages over the electrical concept:
Fast communication between the controller and I/0 devices
Strong resistance to electromagnetic interference
Potential-free connection to isolate the transmitter
Self-shunt static excitation system is a excitation mode in which the excitation power is taken from the static AC voltage source, rectified by the static commutator and then input to the generator rotor excitation winding through the slip ring and brush, and the excitation power is taken from the static AC voltage source, rectified by the static commutator and then input to the generator rotor excitation winding through the slip ring and brush. The system consists of excitation transformers and controlled or uncontrolled rectification devices, and the AC excitation power can be taken from the generator end, or from the factory transformer bus, or from the independent winding in the synchronous generator.
Excitation system is an important equipment of generator set, the main role is to adjust the excitation, to maintain the stator voltage stability, reasonable distribution of reactive power between units, in the event of short circuit, forced excitation to improve the dynamic stability of the system, improve the transmission power limit, expand the range of static stable operation. Excitation system plays an important role in improving the automation level of power plant, the reliability of generator set operation and the stability of power system. With the development of modern science and technology, the excitation mode has been developed from DC motor excitation to thyristor excitation. In the microcomputer self-shunt static thyristor rectifier excitation system, the excitation current of the generator is supplied by the excitation transformer at the motor end after the alarm current of the thyristor rectifier device. The automatic excitation regulator directly regulates the excitation current of the generator to realize the automatic adjustment of the generator terminal voltage or reactive power. This excitation system has the characteristics of fast adjustment speed and high adjustment precision, and has become the mainstream of the development of excitation system

PPD512