电力系统自动化外文翻译资料(编辑修改稿)

电力系统自动化外文翻译资料(编辑修改稿)内容摘要：

ations varies widely. Many of these IED s are still useful but lack the most recent protocols. A munications processor that can municate with each IED via a unique baud rate and protocol extends the time that each IED is useful. Using a munications processor for substation integration also easily acmodates future IED s. It is rare for all existing IED s to be discarded during a substation integration upgrade project. The benefits of monitoring, remote control, and automation of power delivery include improved employee and public safety, and deferment of the cost of purchasing new equipment. Also, reduced operation and maintenance costs are realized through improved use of existing facilities and optimized performance of the power system through reduced losses associa ted with outages and improved voltage profile. Collection of information can result in better planning and system design, and increased customer satisfaction will result from improved responsiveness, service reliability, and power quality. Power system automation includes a variety of equipment. The principal items are listed and briefly described below. Instrument transformers are used to sense power system current and voltage. They are physically connected to power system apparatus and convert the actual power system signals, which includes high voltage and current magnitudes, down to lower signal levels. Transducers convert the analog output of an instrument transformer from one magnitude to another or from one value type to another, such as from an ac current to dc voltage. As the name implies, a remote terminal device, RTU, is an IED that can be installed in a remote location, and acts as a termination point for filed contacts. A dedicated pair of copper conductors are used to sense every c ontract and transducer value. These conductors originated at the power system device, are installed i。