PPD512 A10-15000 3BHEO40375R1023 ABB技術規(guī)格
ABB PPD512A10-454000
提供兩種I/O-快速和慢速。而快速I/O系統(tǒng)涵蓋讀寫操作緩慢的I/O系統(tǒng)需要不到1毫秒的時間來覆蓋速度1毫秒以上?？焖買/O系統(tǒng)是AC 800PEC專用的，使用的是設備僅通過光纖鏈路連接，并帶來與電氣概念相比，具有顯著優(yōu)勢:
控制器和I/0設備之間的快速通信
抗電磁干擾能力強
無電勢連接，使變送器隔離

PPD512

自并勵靜止勵磁系統(tǒng)是勵磁功率取自靜止交流電壓源，經靜止換流整流后再通過滑環(huán)和電刷輸入到發(fā)電機轉子勵磁繞組的勵磁方式，勵磁功率取自靜止交流電壓源，經靜止換流器整流后再通過滑環(huán)和電刷輸入到發(fā)電機轉子勵磁繞組的勵磁方式，系統(tǒng)包括勵磁變壓器和可控或不可控的整流裝置，交流勵磁功率可以取自發(fā)電機端，或廠用變的母線，或同步發(fā)電機內的獨立繞組。
勵磁系統(tǒng)是發(fā)電機組重要設備，主要作用是調節(jié)勵磁，以維持定子電壓穩(wěn)定，合理分配各臺機組間無功功率，在發(fā)生短路時，強行勵磁以提高系統(tǒng)動態(tài)穩(wěn)定能力、提高輸送功率極限、擴大靜態(tài)穩(wěn)定運行的范圍。勵磁系統(tǒng)對提高發(fā)電廠的自動化水平、發(fā)電機組運行的可靠性、電力系統(tǒng)的穩(wěn)定性有著重要的作用。隨著現代科學技術的發(fā)展，勵磁方式已從直流電機勵磁發(fā)展到可控硅勵磁，在微機自并勵靜止可控硅整流勵磁系統(tǒng)中，發(fā)電機的勵磁電流是電機端的勵磁變壓器經過可控硅整流裝置警流后供給，自動勵滋調節(jié)器直接調節(jié)發(fā)電機的勵磁電流以實現自動調整發(fā)電機機端電壓或無功功率，這種勵磁系統(tǒng)具有調節(jié)速度快、調節(jié)精度高的特點，已成為勵磁系統(tǒng)發(fā)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