The existence of all kinds of parasitical return circuit in the circuit of relay protection power system, which leaves the equipments working irregularly, often seriously affects the policy of safe production in the electric power system. 在继电保护回路中经常会遇到各种各样的寄生回路,使继电保护装置处在一种不正常运行状态,严重影响了电力系统安全运行。
The selectivity and VSWR curves of an experimental duplexer, designed according to the specifications obtained by this method and used successfully in an all integrated and all of building-block construction 1 GHz relay communication system, are also given. 给出了根据这一方法设计并成功地使用在1GHz集成化、积木化接力通信系统中的定向滤波式双工器的特性曲线。
However, the two source nodes can not use all relay nodes in the cooperative regions to aid in transmission, because the system power resources are always limited. 但是,源节点不可能利用协作区域内的所有中继节点来辅助传输,因为系统功率资源总是受限的。
Assuming that all the relay nodes have to comply with criteria for collaboration, a stable and efficient wireless coordination system can be achieved. 假设所有的中继节点都遵守协作的准则,一个稳定有效的无线协作系统就可以实现。
In this thesis, based on the concept of distributed MIMO, all nodes of the collaboration relay system have many transmitting antennas assembly, combined with the cyclic delay diversity and different coding technology, designed to improve the system ber performance and reduce the detection complexity. 本文基于分布式MIMO的概念,在协作多中继系统的各节点装配多根发射天线,结合循环延迟分集技术和差分编码技术,旨在提高系统误码性能并且能够降低检测复杂度。
All of the changes make a big challenge for relay protection system of distribution network. 这种变化对配电网继电保护系统提出了极大的挑战。