Jan 7, To obtain the NPAG book, by download or CD-ROM, please use the contact form Jan 7, In order to provide the modern practicing substation engineer with reference material, AREVA’s Network Protection & Automation Guide. Alstom NPAG Network Protection & Automation Guide – New still sealed. EUR ; + EUR postage. MITZ N MITZ01L1AAB ALSTOM.

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I advise you to post the following tutorial from Schneider Electric http: The intention is to make NPAG the standard reference work in its’ subject area – while napg helping the student and young engineer new to the field.

Areva Npag Index

These problems led npsg the concept of ‘Unit Protection’, whereby sections of the power system are protected individually as a complete unit without reference to other sections.

The graded overcurrent systems described in Chapter 9, though attractively simple in principle, do not meet all the protection requirements of a power system. Protection against excess current was naturally the earliest protection system to evolve.

The only exception is the three-phase fault, which, because it involves all three phases equally at the same location, is described as a symmetrical fault. The first part of the book deals with the fundamentals, basic technology, fault calculations and the models of power system plant, including the transient response and saturation problems that affect instrument transformers.

For these reasons, there will be a bias towards dependability of back-up protection at the expense of security.

Recent developments such as privatisation started to focus attention on the cost to the consumer of a loss in supply. Existing chapters on distance, busbar and generator protection have been completely revised to take account of new developments, including improvements due to numerical protection techniques and the application problems of embedded generation. Chapter 24 Substation Control and Automation The sometimes complex interlocking and sequence control requirements that are to be found in a substation of any significant size lend themselves naturally to the application of automation.


The topic has become known by the title of Afeva Quality. Transient faults are commonly caused by lightning and temporary contact with foreign objects. Chapter 23 Power Quality Over the last thirty years or so, the amount of equipment containing electronics has increased dramatically. Chapter 10 Unit Protection of Feeders The graded overcurrent systems described in Chapter 9, though attractively simple in principle, do not meet all the protection requirements of a power system.

Similarly, a protection relay affected by a disturbance through conduction adeva radiation from nearby conductors could trip a feeder or substation, causing loss of supply to a large number of consumers. By using symmetrical component analysis and replacing the normal system sources by a source at the fault location, it is possible to analyze these fault conditions.

Advancements in protection and control application engineering have assisted the authors in exploring and integrating the new techniques and philosophies in this edition, whilst retaining vendor- independence — as we continue to deliver the genuine, impartial, reference textbook. New chapters treat topics such as system integrity protection and remedial action schemes, phasor measurements and wide area schemes.

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With the exception of emerging fuel cell and solar-cell technology for power systems, the conversion of the fundamental energy into its electrical equivalent normally requires a ‘prime aeva to develop mechanical power as an intermediate stage. Thank you for posting this greatly sought out book and articles from time to time that help us electrical engineers keep up to date. Such equipment can both cause and be affected by electromagnetic disturbances.

This form of communication is known as protection signalling. Thank you for posting this tutorial!

The content is copyrighted to EEP and may not be reproduced on other websites. Unit protection schemes, formed by a number of relays located remotely from each other, and some distance protection schemes, require some form of communication between each location in order to achieve a unit protection function.

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The first applications were naturally in the bulk power transmission field, as a natural extension of a trend to centralised control rooms for such systems. Chapter 05 Equivalent Circuits and Parameters of Power System Plant Knowledge of the behaviour of the principal electrical system plant items under normal and fault conditions is a prerequisite for the proper application of protection.

Unrestricted arrva of line protection, such as overcurrent and distance systems, meet this requirement, although faults in the busbar zone are cleared only after some time delay. The testing of protection equipment may be divided into four stages: Motor characteristics must be carefully considered when applying protection; while this may be regarded as stating the obvious, it is emphasised because it applies more to motors than to other items of power system plant.

Chapter 20 Aareva of A. A disturbance that affects a process control computer in a large industrial complex could easily result in shutdown of the process.

The cause of the fault would not be removed by the immediate tripping of the circuit, but could be burnt away during a time-delayed trip. Over the last thirty years or so, the amount of equipment containing electronics has increased arreva. But if unit protection is applied to feeders and plant, the busbars are not inherently protected. There are a wide range of a. Chapter 11 Distance Protection The problem of combining fast fault clearance with selective tripping of plant is a key aim for the protection of power systems.

This chapter summarises basic synchronous machine, transformer and transmission line theory and gives equivalent circuits and parameters so that a fault study can be successfully completed before the selection and application of the protection systems described in later chapters.