Control Systems

Download Digital Signal Processing in Power System Protection and by Waldemar Rebizant PDF

By Waldemar Rebizant

Digital sign Processing in strength process safeguard and Control bridges the distance among the idea of defense and keep watch over and the sensible purposes of safeguard gear. knowing how safeguard capabilities is important not just for gear builders and brands, but in addition for his or her clients who have to set up, set and function the security units in a suitable manner.

After introductory chapters concerning defense know-how and capabilities, Digital sign Processing in energy method defense and Control offers the electronic algorithms for sign filtering, by means of dimension algorithms of the main commonly-used safety standards values and decision-making equipment in protecting relays. a wide a part of the publication is dedicated to the elemental thought and functions of man-made intelligence strategies for defense and regulate. Fuzzy common sense dependent schemes, man made neural networks, professional structures and genetic algorithms with their benefits and disadvantages are mentioned. AI thoughts are in comparison and it's also proven how they are often mixed to do away with the hazards and enlarge the beneficial beneficial properties of specific techniques.

The info supplied in Digital sign Processing in strength method defense and Control will be priceless for defense engineers operating in utilities at a variety of degrees of the electrical energy community, in addition to for college students of electric engineering, specifically electricity engineering. it might probably even be invaluable for different readers who are looking to get familiar with and to use the filtering, measuring and decision-making algorithms for reasons except defense and keep an eye on, all over the place quickly and online sign research is required for correct functioning of the apparatus.

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Extra info for Digital Signal Processing in Power System Protection and Control

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1 Protection Generations Instrument transformers Analog conditioning T A V&I 17 A/D conversion Digital Signal Processing Logic & Comm. Binary I/O Relay Output Internal Bus L A/D B I/O DSP R/O C Trip Power supply LON Processing of analog signals Digital algorithms Output blocks Fig. ). An example of such a structure for system stability monitoring and control is shown in Fig. 5. The information from Phasor Measurement Units installed at selected places in the network is processed to evaluate the safety margin.

10. 3 Hierarchical Structure of Protection and Control Contemporary protection relays are multifunctional universal devices, realizing a lot of additional functions (metering, event/fault recording…), offered as standard even with smallest relays. 3 Hierarchical Structure of Protection and Control 25 future). g. 3 relays, each with about 15 protection functions, needed for protection of a larger generating unit). Most of the present-day relays are combined protection and control units. The protection devices provide control of many circuit breakers, function of keyoperated switching authority, feeder control diagram, status indication of feeder devices at graphic display, measured-value acquisition, signal and command indications, P, Q, cos u and meter-reading calculation, measured-value recording, event logging, switchgear statistics, switchgear interlocking, etc.

2 Discrete System Description in Frequency Domain The alternative way of description of a linear discrete system is its frequency response. This is a supplementary possibility, since sometimes one may need responses in both time and frequency domains. On the other hand, one of those descriptions is enough, since one can get the other one using Fourier transform. The frequency response of a linear system can be obtained using different methods of description in time domain, especially the difference equations and the impulse response (discrete convolution).

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