aforementioned parameters to STANAG design constraints for voltage and Keywords: Ship electric power system, STANAG , pulsed loads, voltage. Studying this standard is interesting as the particular nature of ship electric networks is outlined. • STANAG () referring to the electrical power plants in. Ships. IEC Electrical installations in ships Part Definitions and general requirements. STANAG Characteristics of Shipboard.
|Published (Last):||20 February 2009|
|PDF File Size:||18.24 Mb|
|ePub File Size:||4.95 Mb|
|Price:||Free* [*Free Regsitration Required]|
Furthermore, noise comprise signals with broadband spectral stanag 1008 lower than kHz superimposed upon the power system voltage stanag 1008 current in phase conductors, or found on neutral conductors or signal lines [IEEE ] and it is caused by power electronic devices, control circuits, arcing equipment and switching power supplies.
Voltage dips and swells are characterized by their rms magnitude and duration. In contradiction to other stanag 1008 quality problems, harmonic distortion is a steady-state phenomenon existing on a constant time basis, which stanaf that the stresses occurred, though not severe, can eventually provoke an accumulative result often not easily explained.
In a Standardization Stanah STANAG defines processes, procedures, terms, and conditions for common or technical stanag 1008 or equipment between the member countries of the alliance. These standards refer to continental grids, however, as they have recently issued, stanag 1008 have introduced several new aspects on PSQ terminology and problem resolution.
The name of these disturbances varies depending on certain characteristics of them e.
The purpose is to provide common operational and administrative procedures and, so one member nation’s stanag 1008 may use the stores and support of another member’s military.
Classification Society Rules  mainly referring stanag 1008 normal operation of electric networks of commercial ships. Harmonic power quality refers to the existence of distorted periodic voltage or current waveforms, which, can be expressed via mathematical Fourier analysis, as the superposition of an infinite series of frequencies, the fundamental one the so-called power frequency and etanag multiples, the high-order harmonics VnIn:.
When this dynamic balance changes, e. List of ebooks and manuels about Stanag edition 9. One energy storage technology will not probably be the optimum solution for stanag 1008 application provided that power and energy densities must be adequate to achieve the power and energy levels required for naval stanag 1008 within the allowable economic, size and weight constraints.
Power sources for electromagnetic guns require technologies that are very different from the other applications due to very high pulse powers and very short durations 50GW stanag 1008 ms. Stanag 1008 surge arrester can absorb the energy of a spike or a transient and it is the most typical way to protect loads from experiencing problems by this type of phenomena. Create a free website Powered by. Mains filters should be mounted as close as possible to power entry so that high frequency interference does not bypass the filter.
In stahag symmetrical three phase system, phase voltages are equal in magnitude and their phase angle differs by ?. In isolated power systems, as the ones in ships, problems occur when the governor response to stanaf load changes is not adequate to regulate within the bandwidth required by frequency sensitive equipment example: Deviation from this symmetry unbalance is caused by several reasons:. No need to be fancy, just an stanag 1008.
niina :: Stanag pdf files
Voltage and Frequency modulation. It is worth noting that power quality phenomena refer to the fundamental electric supply quantities, i. Stanag 1008 of equipment sensitive to harmonics. Decrements in accuracy of measuring equipment, which are not designed for non-sinusoidal electric quantity measurements.
Martzloff, Surge stnaag that make sense: It is worth noting that according to the THD definition, both the fundamental component and the high order harmonics should be measured simultaneously. For each power quality issue a succinct description of its nature and origination is made, followed by its possible adverse stanag 1008 as well as limitations set by standards, while in the end a stanag 1008 of mitigation measures stanag 1008 cited.
Considering that the ship system electrification eventually dominates according to the All Electric Ship concept, PSQ issues turn to be a key-factor of the normal operation, survivability and safety aboard.
This energizing drives the network to oscillations with stanag 1008 resonant frequency of the whole system. Swells are usually caused by fault conditions in ungrounded systems.
Stray capacitances actually exist between any conductive elements at different potential stanag 1008 and at a distance from one another, e.
However, limited research work has been reported even for more conventional ship types on the investigation and stanag 1008 of PSQ phenomena. However, there are also some stanag 1008 consequences due to the high valued capacitance, namely the comparatively low transient overvoltages developed during switching operations, as these satnag are reciprocally proportional to the square root of the capacitance.
Martzloff, No joules for surges: Spikes and Transients stanab characterized considering the actual values of the voltage waveform. Voltage dips are responsible for the tripping of computers, adjustable speed drives, electronic equipment and process control equipment.
Bollen, Signatures of shanag dips: Power supply stanag 1008 are an important aspect of power quality and stanag 1008 must be included in a monitoring survey with all the relevant details cause and duration in order to evaluate the performance of the stanag 1008 system, identify the weak components, apply enforcements and select appropriate power quality mitigation equipment. For example spikes can occur in the initial phase of the transient phenomenon following the energizing of a load see Fig 3, .
Author Write something about yourself. This standard refers actually to normal tsanag of warships and has introduced a series of PSQ interesting issues.
Harmonic and notching problems are expected to significantly increase in the AES perspective as their main causes i. The possible stanag 1008, most of which are of stanag 1008 nature are related to an stanga large capacitive current due to the high cumulative capacitance are:.