3 research outputs found
ANALYTICAL REVIEW OF FILTER-COMPENSATING DEVICES (FCD) OF THE HIGHER HARMONIC COMPONENTS OF VOLTAGE AND CURRENT
ΠΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ Π² ΡΠ»Π΅ΠΊΡΡΠΎΠΏΡΠΈΠ²ΠΎΠ΄Π°Ρ
ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠΎΠ² Π³ΠΎΡΠΎΠ΄ΡΠΊΠΎΠ³ΠΎ Ρ
ΠΎΠ·ΡΠΉΡΡΠ²Π° ΡΠΈΡΡΠ΅ΠΌ, Π²ΠΊΠ»ΡΡΠ°ΡΡΠΈΡ
ΠΏΠ°ΡΡ Β«ΠΏΡΠ΅ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°ΡΠ΅Π»Ρ ΡΠ°ΡΡΠΎΡΡ β Π°ΡΠΈΠ½Ρ
ΡΠΎΠ½Π½ΡΠΉ ΡΠ»Π΅ΠΊΡΡΠΎΠ΄Π²ΠΈΠ³Π°ΡΠ΅Π»ΡΒ», Π½Π΅ΠΈΠ·Π±Π΅ΠΆΠ½ΠΎ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΡΡ
ΡΠ΄ΡΠ΅Π½ΠΈΡ ΠΊΠ°ΡΠ΅ΡΡΠ²Π° Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ ΠΏΠΈΡΠ°Π½ΠΈΡ Π² ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ΅ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΡ ΡΡΠΎΠ²Π½Ρ Π²ΡΡΡΠΈΡ
Π³Π°ΡΠΌΠΎΠ½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
. ΠΠ°Π»ΠΈΡΠΈΠ΅ ΠΏΠΎΡΠ»Π΅Π΄Π½ΠΈΡ
Π²Π»Π΅ΡΠ΅Ρ Π·Π° ΡΠΎΠ±ΠΎΠΉ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΠ΅ Π΄Π΅ΠΉΡΡΠ²ΡΡΡΠΈΡ
Π·Π½Π°ΡΠ΅Π½ΠΈΠΉ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ ΠΈ ΡΠΎΠΊΠ°, ΡΡΠΎ Π² ΡΠ²ΠΎΡ ΠΎΡΠ΅ΡΠ΅Π΄Ρ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΡΡΠ°Π±Π°ΡΡΠ²Π°Π½ΠΈΡ Π·Π°ΡΠΈΡ, ΠΎΡΠΊΠ»ΡΡΠ΅Π½ΠΈΡ ΠΏΠΎΡΡΠ΅Π±ΠΈΡΠ΅Π»Π΅ΠΉ ΠΈ ΡΡ
ΡΠ΄ΡΠ΅Π½ΠΈΡ ΡΠ½Π΅ΡΠ³Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ ΡΠ°Π±ΠΎΡΡ ΡΠ½Π΅ΡΠ³ΠΎΡΠΈΡΡΠ΅ΠΌ. Π¦Π΅Π»ΡΡ Π΄Π°Π½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΡ ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΎΠ±Π·ΠΎΡ ΠΈ Π°Π½Π°Π»ΠΈΠ· ΡΡΠ½ΠΊΡΠΈΠΎΠ½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΈΠΌΠ΅Π½ΡΠ΅ΠΌΡΡ
Π² Π½Π°ΡΡΠΎΡΡΠ΅Π΅ Π²ΡΠ΅ΠΌΡ ΡΠΈΠ»ΡΡΡΠΎΠΊΠΎΠΌΠΏΠ΅Π½ΡΠΈΡΡΡΡΠΈΡ
ΡΡΡΡΠΎΠΉΡΡΠ² (Π€ΠΠ£) Π΄Π»Ρ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΡ Π²Π»ΠΈΡΠ½ΠΈΡ Π½Π° ΡΠ΅ΡΠΈ Π²ΡΡΡΠΈΡ
Π³Π°ΡΠΌΠΎΠ½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
. Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ ΡΠ»ΡΡΠ°ΠΈ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ Π»ΠΈΠ½Π΅Π°ΡΠΎΡΠΎΠ², ΠΏΠ°ΡΡΠΈΠ²Π½ΡΡ
Β«R-L-CΒ» ΡΠΈΠ»ΡΡΡΠΎΠ², ΡΡ
Π΅ΠΌ 12-ΡΠΈ ΠΈ 18-ΡΠΈ ΠΏΡΠ»ΡΡΠ½ΡΡ
Π²ΡΠΏΡΡΠΌΠΈΡΠ΅Π»Π΅ΠΉ, Π° ΡΠ°ΠΊΠΆΠ΅ ΠΏΠ°ΡΠ°Π»Π»Π΅Π»ΡΠ½ΡΡ
Π°ΠΊΡΠΈΠ²Π½ΡΡ
ΡΠΈΠ»ΡΡΡΠΎΠ² (ΠΠΠ€) ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½ΠΎΠ³ΠΎ Π΄Π΅ΠΉΡΡΠ²ΠΈΡ, ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠΈΠ²Π°ΡΡΠΈΡ
Π½Π΅ ΡΠΎΠ»ΡΠΊΠΎ ΠΊΠΎΡΡΠ΅ΠΊΡΠΈΡ ΡΠΎΡΠΌΡ ΠΊΡΠΈΠ²ΡΡ
ΡΠΎΠΊΠ° ΠΈ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ, Π½ΠΎ ΠΈ ΠΊΠΎΠΌΠΏΠ΅Π½ΡΠ°ΡΠΈΡ ΡΠ΅Π°ΠΊΡΠΈΠ²Π½ΠΎΠΉ ΠΌΠΎΡΠ½ΠΎΡΡΠΈ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π΄Π»Ρ ΡΠ»ΡΡΡΠ΅Π½ΠΈΡ ΠΊΠ°ΡΠ΅ΡΡΠ²Π° Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ Π² ΡΠ΅ΡΡΡ
0,4 ΠΊΠ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΡΠΏΠ΅ΡΠΈΠ°Π»ΡΠ½ΡΡ
ΡΠΈΠ»ΡΡΡΠΎΠΊΠΎΠΌΠΏΠ΅Π½ΡΠΈΡΡΡΡΠΈΡ
ΡΡΡΡΠΎΠΉΡΡΠ², Π²ΡΠ±ΠΎΡ ΡΠΈΠΏΠ° ΠΈ ΠΌΠΎΡΠ½ΠΎΡΡΠΈ ΠΊΠΎΡΠΎΡΡΡ
Π΄ΠΎΠ»ΠΆΠ΅Π½ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΡΡΡΡ Π΄Π»Ρ ΠΊΠ°ΠΆΠ΄ΠΎΠ³ΠΎ ΠΊΠΎΠ½ΠΊΡΠ΅ΡΠ½ΠΎΠ³ΠΎ ΡΠ»ΡΡΠ°Ρ ΠΈΠ½Π΄ΠΈΠ²ΠΈΠ΄ΡΠ°Π»ΡΠ½ΠΎ, ΠΈΡΡ
ΠΎΠ΄Ρ ΠΈΠ· ΡΡΠ»ΠΎΠ²ΠΈΠΉ ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΈΡ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΡ
ΡΠ΅Ρ
Π½ΠΈΠΊΠΎ-ΡΠΊΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Π΅ΠΉ.The use in electric drives of municipal services systems, including a couple of βfrequency converter - asynchronous induction motorβ, will inevitably lead to a deterioration in the quality of the supply voltage by increasing the level of the higher harmonic components. The presence of them leads to an increase in operating voltage and current, which in turn leads to an atuatuion of the protection, blackouts and poor in energy performance of power systems. The aim of the article is to make a review and analyze the functioning of the currently used filter-compensating devices (FCD) to reduce the impact on the network of higher harmonic components. We analyze line application, passive Β«RLCΒ» filter, circuits 12 and 18-pulse rectifier and parallel active filter (PAF) integrated action to ensure not only the correction of the shapes of the current and voltage, and compensation of reactive power. It was found that to improve the quality of voltage of 0.4 kV networks it requires the use of special filter-devices, the choice of type and capacity which should be carried out for each case individually, based on the conditions for obtaining optimum technical and economic indicators
COSMOGRAIL: Measuring Time Delays of Gravitationally Lensed Quasars to Constrain Cosmology
COSMOGRAIL is a long-term programme for the photometric monitoring of gravitationally lensed quasars. It makes use of several medium-size telescopes to derive long and well-sampled light curves of lensed quasars, in order to measure the time delays between the quasar images. These delays directly relate to the Hubble constant H0, without any need for secondary distance calibrations. COSMOGRAIL was initiated in 2004, and has now secured almost a decade of data, resulting in cosmological constraints that are very complementary to other cosmological probes
The Stellar Abundances and Galactic Evolution Survey (SAGES). I. General Description and the First Data Release (DR1)
The Stellar Abundances and Galactic Evolution Survey (SAGES) of the northern sky is a specifically designed multiband photometric survey aiming to provide reliable stellar parameters with accuracy comparable to those from low-resolution optical spectra. It was carried out with the 2.3 m Bok telescope of Steward Observatory and three other telescopes. The observations in the u _s and v _s passband produced over 36,092 frames of images in total, covering a sky area of βΌ9960 deg ^2 . The median survey completenesses of all observing fields for the two bands are u _s = 20.4 mag and v _s = 20.3 mag, respectively, while the limiting magnitudes with signal-to-noise ratio of 100 are u _s βΌ 17 mag and v _s βΌ 18 mag, correspondingly. We combined our catalog with the data release 1 (DR1) of the first Panoramic Survey Telescope And Rapid Response System (Pan-STARRS, PS1) catalog, and obtained a total of 48,553,987 sources that have at least one photometric measurement in each of the SAGES u _s and v _s and PS1 grizy passbands. This is the DR1 of SAGES, released in this paper. We compared our gri point-source photometry with those of PS1 and found an rms scatter of βΌ2% difference between PS1 and SAGES for the same band. We estimated an internal photometric precision of SAGES to be of the order of βΌ1%. Astrometric precision is better than 0.β³2 based on comparison with DR1 of the Gaia mission. In this paper, we also describe the final end-user database, and provide some science applications