Automatically Controlled Substations

Wireless Communications in Substations

Adaptive blind equalizers with automatically controlled parameters

Signals when pass through a channel undergo various forms of distortion, most common of which is Inter-symbol-interference, so called ISI. Inter-symbol interference induced errors can cause the receiver to misinterpret the received samples. Equalizers are important parts of receivers, which minimizes the linear distortion produced by the channel. If channel characteristics are known a priori, t...

Installation of Automatically Controlled Compensation Banks

In fact, the problem of arranging one or more capacitor(s) to form a constant level of compensation in electrical power system is quite significant. The two major problems that the modern power systems are facing are voltage and angle stabilities. There are various approaches to overcome the problem of stability arising due to small signal oscillations in an interconnected power system. Install...

Automatically Controlled-Vocabulary Indexing for Text Retrieval

The IR society has made efforts in free-term indexing for a long time. By contrast, few efforts are made in controlled-vocabulary indexing. A new model for controlled-vocabulary indexing is proposed in this paper. This proposed model, TF×OSDF×CSIDF, distinguishes subjectspecific words from common words and domain-specific words in documents. 60,400 MEDLINE records are used as training data and ...

POWER QUALITY IMPROVEMENTS IN 25kV 50Hz RAILWAY SUBSTATIONS BASED ON CHOPPER CONTROLLED IMPEDANCES