determine reduced power quality problem cost

... divided into three sections: Power Quality Issues and Standards in Electricity Networks; Power Quality Improvements in Transmission and Distribution Systems; and Power Quality Improvement in End ... Update on Power Quality Figure 1 Grid integration of interconnected system Power Quality and Grid Code Issues in Wind Energy Conversion System 23 The critical power quality issues ... with power system impedance and gives rise to harmonics The effect of harmonics in the power system can lead to degradation of power quality at the consumer’s terminal, increase of power...

Ngày tải lên: 17/03/2014, 02:20

... applications dealing with power quality disturbances, and proposes a set of reliability criteria to determine the data quality, which can be directly applied to recorded data and used to determine which ... Terziyski Chapter 5 Thermal Analysis of Power Semiconductor Converters 131 Adrian Plesca Part 3 Harmonic Distortion 151 Chapter 6 Improve Power Quality with High Power UPQC 153 Qing Fu, Guilong ... Ensuring optimal power quality after a good design and devices means productivity, efficiency, competitiveness and profitability. Nevertheless, nobody can assure the optimal power quality when...

Ngày tải lên: 19/06/2014, 08:20

... Group on Power System Harmonics, Power System Harmonics: An Overview,” IEEE Trans on Power Apparatus and Systems, Vol PAS-102, No 8, pp 245 5- 246 0, August 1983 Electric Power Systems ... of Power System Frequency”, IEEE Transaction on Power Delivery, Vol 13, No 1,... Filtering Based Algorithm for Low Frequency Power Systems Sub -harmonics Identification,” Int Jr of Power ... Power Quality Harmonics Analysis and Real Measurements Data S.A Soliman, I Helal, and A M Al-Kandari, Fuzzy linear regression for measurement of harmonic components in a power...

Ngày tải lên: 19/06/2014, 08:20

... Measurement Data for Assessing Power Quality Disturbances Alexandre Brandao Nassif Hydro One Inc.,Toronto, ON, Canada 1. Introduction Power quality assessment is a power engineering field that ... turn used to determine the filters’ tuning frequencies (Kimbark, 1971). With so much reliance on the acquired data, the quality of such has become a very sensitive issue in power quality. An ... function using the power spectral method based on correlation functions can be treated as the result from dividing the cross-power spectrum by the auto-power spectrum. For electrical power systems,...

Ngày tải lên: 19/06/2014, 08:20

... is one of the significant parameters of power quality in power system Numerous problems related to voltage and current harmonic effects for contemporary power systems are commonly observed nowadays ... low rated power, intended to supply only measuring inputs 90 Power Quality Harmonics Analysis and Real Measurements Data of metering apparatus or protection relays extensively used in power system ... beyond frequency of kHz This chapter presents problems of voltage harmonic transfer accuracy through voltage transformers which are usually used for power quality monitoring in medium and high voltage...

Ngày tải lên: 19/06/2014, 08:20

... thermal analysis of power semiconductors is related only to the power device alone. But in the most practical applications, the power semiconductor device is a part of a power converter (rectifier ...         (10) Power Quality Harmonics Analysis and Real Measurements Data 136 2.4 Triangle pulse series input power A series of triangle input power is shown in Fig. 5. The ... admissible value for power semiconductor junction, about 1250C Therefore, it requires an adequate protection for the power diode or increasing of load resistance 140 Power Quality Harmonics...

Ngày tải lên: 19/06/2014, 08:20

... structure and reduce the cost of UPQC. Power Quality Harmonics Analysis and Real Measurements Data 156 Load UPQ C Inverter2 Inverter1 Utility S Z Fig. 3. Unified Power Quality Conditioner ... Harmonic Distortion 6 Improve Power Quality with High Power UPQC Qing Fu, Guilong Ma and Shuhua Chen Sun Yat-sen University China 1. Introduction An ideal AC power transmission is pure sinusoidal, ... of series APF 2.2 Shunt active power filter The distortion of current not only brings serious loss of power transmission, but also endangers power grid and power equipments. Harmonic current...

Ngày tải lên: 19/06/2014, 08:20

... Tironi, E.(2009). A New Proposal for Power Quality and Custom Power Improvement: OPEN UPQC, Power Delivery, Vol.24, No.4, pp.2107-2116, ISSN:0885-8977 Power Quality Harmonics Analysis and Real ... voltage distortions, which may damage power quality. In this sense, the effects of harmonics on power systems and their acceptable limits are well known [IEC power quality standards, (IEC 6100-3- ... APF which can protect load from almost all supply problems of voltage quality and eliminate harmonic current transferred to power grid. In high power UPQC, load harmonic current is a bad disturb...

Ngày tải lên: 19/06/2014, 08:20

... extinguished at current zero, the power factor plays an important role on arc re-ignition. The figure 1. shows how arc voltage, power factor, input power; arc power and reactive power vary with arc current ... computer power quality monitoring has also moved towards investigating the effects that large concentrations of PCs can have on other utility customers. Personal computing impacts on power quality ... supply voltages causing power quality problems for other consumers connected at a point of common coupling [22]. Additionally, and somewhat ironically, the switched mode power supply itself can...

Ngày tải lên: 19/06/2014, 08:20

... Preface IX Part 1 Power Quality Monitoring, Classification, Measurements, and Analysis 1 Chapter 1 Power Quality Monitoring 3 Kazem Mazlumi Chapter 2 Wavelet and PCA to Power Quality Disturbance ... to measure power and power quality indexes based on the instant power theory under non sinusoidal conditions is presented. X Preface Chapter 4 deals with the application of power quality monitoring ... find very difficult to meet energy demands which leads to load shedding and power quality problems. This book on power quality written by experts in their fields will be of great benefit to professionals,...

Ngày tải lên: 19/06/2014, 11:20

... review of apparent power, reactive power and power factor definitions. First, the most commonly used definitions for apparent power are presented, after that, reactive power and the power factor ... measure power and power quality indexes based on the instant power theory under non sinusoidal conditions is presented. Finally, the most remarkable conclusions are discussed. 2. Electrical power ... used ones are described next. Power Quality – Monitoring, Analysis and Enhancement 40 2.2 Reactive power and distortion power definitions One of the first power definitions that include the...

Ngày tải lên: 19/06/2014, 11:20

... protection relay and power quality analyser The architecture of combined protection relay and power quality analyser has been shown in Figure 3. The architectures of power quality analyzer and ... classifier for identification the various power quality events 86 Power Quality – Monitoring, Analysis and Enhancement Nine types of power quality disturbances are generated in ... = ~ PQ Analyzer Fig. 2. Power grid with the nodes at which it is possible to combine protection functions with power quality analysis 2. Integrating power quality analysis and protection...

Ngày tải lên: 19/06/2014, 11:20

... improve the power quality The classical method of power quality analysis used in power quality monitoring sytems has been the discrete Fourier transform (DFT)... in Power Quality ... events by using... relation and to improve the power quality Features extraction of power quality disturbances using methodes of power quality analysis, in order to achive automatic ... Impulsive transient 103 Methodes of Power Quality Analysis In most cases the power quality disturbances are nonstationary and nonperiodic For power quality analysis is useful to...

Ngày tải lên: 19/06/2014, 11:20

... or calculations of power terms and it can have a direct effect on many other power system’s applications, such as: power quality instrumentation and analysis, protection, power conditioning, ... its influence of the quantification of some power quality indicators, as well as, in terms the apparent power definition. The analysis of some power quality indices will illustrate how the selection ... the several power quality indicators. 5. Apparent power definitions using different voltage referential To analyze the influence of the voltage referential for apparent power and power factor...

Ngày tải lên: 19/06/2014, 11:20

... of protection 174 Power Quality – Monitoring, Analysis and Enhancement. .. = E1 I cos(φ1 − α ) − I 2 R (41) The real part of equation (40): 184 Power Quality – Monitoring, Analysis ... that would determine the information about a change in the impedance should be selected for the specific site at which this method is applied to voltage dips location  186 Power Quality – ... application... power and energy is determined on the basis of registered voltage and current waveforms In the steady state, assuming that the network is a symmetrical one, instantaneous power ...

Ngày tải lên: 19/06/2014, 11:20

... disturbance assessment 204 Power Quality – Monitoring, Analysis and Enhancement 3.1 Traditional power quality indices... oscillatory transient etc.) Several power quality indices identified ... integrating power quality monitoring functions in their products such as power meters, digital relays and event recorders (Ward, 2001) One of the most important aspects in power quality ... on Power Delivery, 20, 2005, pp 5 29- 31 [31]... Novel Indices for Power Quality Disturbances Zhengyou He and Yong Jia Southwest Jiaotong University China 1 Introduction Power quality...

Ngày tải lên: 19/06/2014, 11:20

... than other power quality phenomenon These sags/swells are the most 306 Power Quality – Monitoring, Analysis and Enhancement important power quality problems in the power distribution ... concern over power quality of ac supply systems Power quality can be defined as the ability of utilities to provide electric power without interruption Various power quality problems ... Voltage Reactive Power Fig. 14. Minimum reactive power exchanged with SVC installed at bus 4 Optimal Location and Control of Flexible Three Phase Shunt FACTS to Enhance Power Quality in Unbalanced...

Ngày tải lên: 19/06/2014, 11:20

... (DVR) for Voltage Quality Improvement in Electrical Distribution System 317 a) b) Fig. 8. FFT Analysis for Voltage a) without or b) with Capacitors Filter Power Quality – Monitoring, ... for Voltage Quality Improvement in Electrical Distribution System 319 a) b) Fig. 10. a) One Phase Voltage Swells, and b) Voltage Swells after Compensation Power Quality – Monitoring, ... power plants of capacities 2000 KVA, 6.6KV and 3000 KVA, 3.3KV are connected to the buses 32 and 8, respectively These power plants are used as distributed generation units to 336 Power...

Ngày tải lên: 19/06/2014, 11:20

... active power plays a vital role. One main reason in emphasizing power quality is the amount of consumption of active power by the load i.e the efficiency of the system is decided by the quality ... Yss=admittance b/w main station and bus j PDj=Real power load at bus j Improvement of power quality: To quantify the minimum... 354 Power Quality – Monitoring, Analysis and Enhancement ... quantity of power i.e active power which was the main issue and still researchers are working on various sources to meet out the exponentially increasing demand. But now, the issue of power quality...

Ngày tải lên: 19/06/2014, 11:20

... time-domain power system simulator [9] and actual measurement data in Section The paper concludes in Section PROBLEM DESCRIPTION AND SCOPE OF THE PROBLEM Let us consider a one-line diagram for a power ... Beaty, Electrical Power Systems Quality, McGraw-Hill, New York, NY, USA, 2nd edition, 2003 [2] T E Grebe, “Application of distribution system capacitor banks and their impact on power quality,” IEEE ... analysis of power system transients,” IEEE Transactions on Power Delivery, vol 20, no 3, pp 2298–2306, 2005 I Y H Gu and E Styvaktakis, “Bridge the gap: signal processing for power quality applications,”...

Ngày tải lên: 22/06/2014, 19:20