monitoring analysis and feedback

... purpose of Circuit Analysis and Feedback Amplifier Theory is to provide in a single volume a comprehensive reference work covering the broad spectrum of linear circuit analysis and feedback amplifier ... Transactions on Circuits and Systems, Series I and II, President of the IEEE Circuits and Systems Society, and is the Founding Editor and Editor-inChief of the Journal of Circuits, Systems and Computers ... of Broadband Matching Networks (Pergamon Press), Active Network and Feedback Amplifier Theory (McGraw-Hill), Linear Networks and Systems (Brooks/Cole), Passive and Active Filters: Theory and Implements...

Ngày tải lên: 07/03/2014, 07:20

... Cantabria (UC), Santander, Spain Ramesh Bansal The University of Queensland, Australia Part Power Quality Monitoring, Classification, Measurements, and Analysis Power Quality Monitoring Kazem Mazlumi ... the problems and find solutions Although the Power Quality – Monitoring, Analysis and Enhancement power quality monitoring relies on measuring various parameters, only voltage sags and locating ... with Distributed and Renewable Energy Sources 61 Andrzej Nowakowski, Aleksander Lisowiec and Zdzisław Kołodziejczyk Chapter Application of Signal Processing in Power Quality Monitoring 77 Zahra...

Ngày tải lên: 19/06/2014, 11:20

... Where c j and d j are the scaling and wavelet coefficients indexed by j, and both functions must be orthonormal 24 Power Quality – Monitoring, Analysis and Enhancement The wavelet and scaling ... Power Quality – Monitoring, Analysis and Enhancement SLG fault exposed area of bus 35 contains buses 30 and 32 Also, the 0.8 pu three phase fault exposed area contains buses 30, 32, and 38 The SLG ... practice (Mix & Olejniczak, 2003) 26 Power Quality – Monitoring, Analysis and Enhancement % with f as the original signal; N the length of f; and g and h the wavelet filters: % for one decomposition...

Ngày tải lên: 19/06/2014, 11:20

... Power Quality Monitoring in a System with Distributed and Renewable Energy Sources Andrzej Nowakowski, Aleksander Lisowiec and Zdzisław Kołodziejczyk Tele -and Radio Research Institute Poland Introduction ... Quality – Monitoring, Analysis and Enhancement Case - Balanced and sinusoidal system: In this case, the oscillatory, the negative sequence, and the zero sequence terms of both the real and the ... power, and and are de reactive and distortion power defined by Budeanu, respectively The definitions described by Eq (66) and Eq (67) are identical and produce correct results for balanced load and...

Ngày tải lên: 19/06/2014, 11:20

... Monitoring, Analysis and Enhancement disturbances that may be encountered The principal standards in this field are IEC 61000, EN 50160, and IEEE 1159 Standards are essential for manufacturers and users ... software and power quality analyzers contain more elaborate spectrum analysis and statistical software Power quality analyzers also have wider input bandwidth to measure accurately harmonic and interharmonic ... magnitude of the greater of the values of N and M This is one of the many reasons why the values of N and M should be 68 Power Quality – Monitoring, Analysis and Enhancement chosen as low as possible...

Ngày tải lên: 19/06/2014, 11:20

... product of their standard deviations The population correlation coefficient ρX,Y between two random variables X and Y with expected values μX and μY and standard deviations σX and σY is defined ... 94 Power Quality – Monitoring, Analysis and Enhancement where r : correlation coefficient X, Y : the means of X and Y respectively S X , S Y : the standard deviation of X and Y respectively The ... information and collinear candidate inputs in addition to the irrelevant candidates This technique is done in two steps At first if the mutual information between a candidate variable and output...

Ngày tải lên: 19/06/2014, 11:20

... rise time, V1 and V2 are the values obtained at low sampling rate and respectively at increased sampling rate, Er1 and Er2 are the errors between V1 and V2 and respectively Ve and Er1/Er2 is ... plots are obtained amplitude, frequency and time information in order to detect, localize and classify the disturbance 114 Power Quality – Monitoring, Analysis and Enhancement Fig 12 S-transform ... x[.] and y[.] were generated, containing the details length of each wavelet sub band and the energy of each of these sub bands respectively The procedure for the creation of vectors x[.] and y[.]...

Ngày tải lên: 19/06/2014, 11:20

... 138 Power Quality – Monitoring, Analysis and Enhancement factors and voltage sags and swells, especially in case of three-phase four-wire circuits ... collective and effective currents and voltages by means of symmetrical components, the following relations could be extracted from (Willems et al 2005): 144 Power Quality – Monitoring, Analysis and ... 154 Power Quality – Monitoring, Analysis and Enhancement Equation (30) finally provides the relationship between the measured voltage between the neutral and the virtual point and the zero-sequence...

Ngày tải lên: 19/06/2014, 11:20

... on: the analysis of voltage and current waveforms; the analysis of the system operation trajectory during the dip; the analysis of the equivalent electric circuit; the analysis of power and energy ... disturbance; the analysis of voltages; asymmetry factor value and symmetric component phase angle and algorithms for the operation of protection 174 Power Quality – Monitoring, Analysis and Enhancement ... sources ES and EC In order to find the answer has been defined the voltage value at an arbitrary point m between sources ES and EC (Fig 2): 168 Power Quality – Monitoring, Analysis and Enhancement...

Ngày tải lên: 19/06/2014, 11:20

... An example of changes in the flicker severity and the active and reactive power ― phase L1 (diagram in (a)) 190 Power Quality – Monitoring, Analysis and Enhancement 4.1 Criterion of voltage fluctuations ...   ) × 100% (16) 206 Power Quality – Monitoring, Analysis and Enhancement where Ad=A1-A0 and A1, A0 are the amplitude spectrum of the disturbance signal and pure sinusoid signal respectively ... interharmonic power, he can be identified as interharmonic source and consequently the flicker source 192 Power Quality – Monitoring, Analysis and Enhancement The frequency of an interharmonic signal...

Ngày tải lên: 19/06/2014, 11:20

... steady values of IRMS and IWDR are 0.707 and There are also two peaks in the IHDR and IAF corresponding to the start and end time, which are 28.2% and 190Hz at 0.082s and 22.3% and 109Hz at 0.313s ... same rms value and is opposite to that on the T phase: I RT = − I TR (16) 224 Power Quality – Monitoring, Analysis and Enhancement a) b) Fig Inductive load supplied between T and R phases Now ... having the capacitances C1 and C2 and inductance L2 have to allow the control of these values according to load variation 226 Power Quality – Monitoring, Analysis and Enhancement a) b) Fig Simplified...

Ngày tải lên: 19/06/2014, 11:20

... capable of withstanding the extreme conditions that are impingingly demanded for the new heat sinks Power electronics and optoelectronics demand thermal conductivities (TC) above 350 W/mK and 450 W/mK ... layer, and from 2.8 to 8% for the SiC0.03 layer At temperatures 20–600°C, in these layers dominate the long and weak Si−C-bonds, which absorb at frequencies of 700 and 750 cm–1 (Fig 25d-f, curves and ... C- and C−Si-clusters, made basing the analysis of IR spectra Analysis of the behavior of the curves in Fig 26 may be interesting from the point of studying the influence of decay of clusters and...

Ngày tải lên: 19/06/2014, 11:20

... mode has been selected by the 270 Power Quality – Monitoring, Analysis and Enhancement Embedded MATLAB function, and after this time, both the CM and the FCM modes have been selected as well Also, ... are 2TS = 0.001 [sec] and 2Tch = 0.001 [sec] , and that their magnitudes are TS and Tch , respectively In Fig 15, the steady state line voltage and the current of loads and are shown Fig 16 shows ... calculated and applied to the inverter If the phasor voltage of the R-L load 274 Power Quality – Monitoring, Analysis and Enhancement   (resulting only from the generator) before and after the...

Ngày tải lên: 19/06/2014, 11:20

... between the series inverter and the transformer 308 Power Quality – Monitoring, Analysis and Enhancement and the high voltage side(C1,C2 and C3), when it is placed in low voltage side, high order harmonics ... profiles for phase ‘c’: One SVC installed at bus 5, bus 4, and two SVC installed at buses: 4, 298 Power Quality – Monitoring, Analysis and Enhancement Voltage Magnitude Negative sequence 4.2 Case ... modelization: a tool for optimal location and control of FACTS devices in unbalanced power systems, The 32nd Annual 304 Power Quality – Monitoring, Analysis and Enhancement Conference of the IEEE...

Ngày tải lên: 19/06/2014, 11:20

... Overview of IEC and IEEE Standards and Application Criteria, Proceedings of IEEE Conference on Transmission and Distribution, 1999,Vol pp 585-589 324 Power Quality – Monitoring, Analysis and Enhancement ... System a) b) Fig FFT Analysis for Voltage a) without or b) with Capacitors Filter 317 318 Power Quality – Monitoring, Analysis and Enhancement a) b) Fig a) Balanced Voltages Swells, and b) Load Voltages ... 326 Power Quality – Monitoring, Analysis and Enhancement accurately reproduced by means of a time-domain simulation tool, and using a stochastic prediction to incorporate the random nature of voltage...

Ngày tải lên: 19/06/2014, 11:20

... 338 Power Quality – Monitoring, Analysis and Enhancement Fault Location bus 22 is considered as the weakest bus in this group and in the system It is considered as the most ... magnitudes of system buses at steady state load flow and during three phase fault at bus 22 after reconfiguration 342 Power Quality – Monitoring, Analysis and Enhancement Voltage magnitude pu 1.5 0.5 ... 0093–9994 Grainger, J J (1994) Power system analysis McGraw-Hill, ISBIN 0-07-113338-0, Singapore Gupta, B.R (2004) Power System Analysis and Design S Chand & Company, Ltd., ISBN 81219-2238-0, New...

Ngày tải lên: 19/06/2014, 11:20

... generator, propulsion induction motor, and power inverter will be considered 364 Power Quality – Monitoring, Analysis and Enhancement References Ashish Ahuja, Sanjoy Das, and Anil Pahwa, Fellow, IEEE, ... Systems Operation and Planning, May 22-26, 2005, Cape Verde, pp.98-102, vol-1 Mukwanga W Siti, Dan Valentin Nicolae, Adisa A Jimoh, Member, IEEE, and Abhisek Ukil, 2007, Reconfiguration and Load balancing ... reconfiguration, Electric Power Components and Systems Vol.33 (5) pp 539-550 Verbi’c Gregor, Pantoˇs Miloˇs, Gubina Ferdinand, 2006 On voltage collapse and apparentpower losses, Electric Power...

Ngày tải lên: 19/06/2014, 11:20

... Where c j and d j are the scaling and wavelet coefficients indexed by j, and both functions must be orthonormal 24 Power Quality – Monitoring, Analysis and Enhancement The wavelet and scaling ... the problems and find solutions Although the Power Quality – Monitoring, Analysis and Enhancement power quality monitoring relies on measuring various parameters, only voltage sags and locating ... Cantabria (UC), Santander, Spain Ramesh Bansal The University of Queensland, Australia Part Power Quality Monitoring, Classification, Measurements, and Analysis Power Quality Monitoring Kazem Mazlumi...

Ngày tải lên: 26/06/2014, 23:20

... P(s) and C(s) represent the plant and controller, respectively, and the nonlinear functions f (·) and g(·) describe, respectively, the actuator and sensor The signals r, d, e, u, v, y, and ym ... coloring filter with the 3dB bandwidth r , the plant, and the controller, respectively, f (u) is the actuator nonlinearity, and wr and r are standard white noise and the reference signal Since, ... system the actuator and sensor, F d (s) and F r (s) are coloring filters with 3dB bandwidths r , respectively, wr , wd are independent standard Gaussian white noise d and processes, and the scalars...

Ngày tải lên: 23/03/2014, 15:20

... MacFarlane and Belletrutti (1973), Nwokah (1983) and Morari (1985), and effectively unified by Nwokah and Perez (1990) The relevant tools such as characteristic loci, Nyquist arrays and Gershgorin bands ... Relay feedback system If the RFS generates a limit cycle, let T+ and A+ be the half period and the extreme value corresponding to u(t) = u+ , respectively, and T− and A− be the half period and ... (Tsinias and Kalouptsidos, 1990) and the solution of some Linear Quadratic (LQ) control problem (Trofino-Neto and Kucera, 1993; Kucera and de Souza, 1995) have been developed to enable stability analysis...

Ngày tải lên: 13/09/2015, 21:12