harmonics

This deviation from perfect sinusoids is usually expressed in terms of harmonics distortion of the voltage and current waveforms.

Cutting out harsh high frequency harmonics seems to be one of the underlying principles of the TS series.

The continuous wavelet transform (CWT) has been used to measure harmonics due to its excellent time-frequency character.

Travel with me to the Pyramid of the Feminine, She who now returns to planet Earth to express herself in the light harmonics of creation.

Harmonics can be added to a wave which has a single frequency to produce a complex wave.

The approach starts from an analysis of spherical harmonics and finds out a quadratic polynomial form of environment mapping.

Furthermore, it has been used in the analysis of harmonics in the article.

Harmonics of these normal forces will resonate the natural frequency resonant modes of the stator structure so producing acoustic noise.

Following the mixers, an IF filter and a RF filter are used to attenuate unwanted harmonics or interference respectively.

Every sound, at least theoretically, presents a complex system of harmonics built on a fundamental tone.

It was there that she worked as a healer using crystal harmonics to balance the energies of all sentient life forms .

The violinist had the technical skill to execute the cadenza, with its double stops and harmonics, with brilliance.

The application has proved that this system can detect the specifically harmonics, so it will have a good application.

Two-dimensional field mapping of an oblique slice causes ambiguity in determination of the degenerate spherical harmonics terms.

Amplifiers used in digital systems must be wide-band amplifiers because of the many harmonics that make up a square wave.

The chirped multilayer mirror in the extreme ultraviolet region can be used to select some high harmonics and compensate the chirp.

Synthesize of time domain wave form by summation of harmonics or sinusoidal wave form of discrete frequencies.

The origin of these harmonics and main factors influencing the harmonic efficiency are discussed in detail.

Finally, theory can be applied for the actual conduct of the power harmonics detection device.

A resonant controller under stationary coordinates is proposed to detect the selected harmonics without complicated coordinates transform.

Thus, a direct bus current can be detected precisely and an upper harmonics component is inhabited.

As the starting point of research harmonic question , harmonic measurement becomes first subject on study harmonics.

This system automates transformer harmonics measurement, and improves productive efficiency greatly.

Step skewing of rotor magnets is an efficient manner for reducing harmonics and minimizing cogging torque and torque ripple.

Therefore, the equipment that can accurately measures the power of both basic wave and harmonics is in urgent need.

At the same time, the result of simulation shows that the method can detect the harmonics more accurately.

By the end of the 18th century, crooks were used to extend the compass of harmonics.

Also, the harmonic filter is a low pass filter having a frequency cut-off point that attenuates first order harmonics of the output signal.

A viewpoint is put forward that filters should be designed to reduce or eliminate harmonics at the input and output ports.

It provides a modulated clock source that reduces electromagnetic emissions and associated harmonics at the source.

In recent years, many countries and international organization have proposed regulations on the harmonics of power equipment.

The world service counterpart of harmonics has the purpose of sustaining the sound and music in the energy flow of the whole.

This paper introduces two methods of detecting harmonics. By comparison we find wavelet packet transform has apparent advantages.

The electronic buck energy-saving device should be improved so that more energy can be conversed and less harmonics is generated.

Supplements e. g. The first term of Fourier series is called the fundamental, the others the harmonics .

Several spherical harmonics degenerate on an oblique plane.

Finite sum of harmonics for approximation of a step exponential pulse.

The paper selects the eliminated harmonics number M =13 as an example computer simulation has verified the validity of this theory.

Harmonic filters for these harmonics are generally provided on the AC and DC sides of the converter terminals.

The algorithm of interpolation of hanning windows FFT reduce the spectral leakage error and the interference between harmonics.

In order to suppress the danger of harmonics, one effective measure is to put reactor in series in the capacitor circuit.

Power harmonics caused by nonlinear load increased distribution transformer's additional loss which causing a huge waste of energy.

The time-space harmonics distribution of multiphase induction machine fed by PWM VSI and the existent ripple torque are analyzed.

Meanwhile, in the main circuit structure, the use of LCL filter, improved high frequency switching harmonics suppression.

Harmonics can increase harmonic losses and heat of converter transformers, generate higher noise.

The quotient of the amplitude of harmonics allows us to calculate the unbalance between paths and to compensate for it.

In power converters, unbalances generate undesirable DC ripple and non characteristics harmonics in the AC side.

The content of high harmonics in public power grids is the important indicator which measures the quality of power grid system.

Avoid touching the support with the barrel of the weapon since itinterferes with barrel harmonics and reduces accuracy.

The characteristics of the harmonics caused by stray capacity of converter transformer in three pulse converter model are presented.

The modulation of the R6 in conjunction with the use of a commutation choke generates harmonics.

Describe their respective roles in pitch perception. How would you determine physiologically if a given set of harmonics is resolved?

The HF harmonics of fault voltage are more serious than those of fault current under the same fault condition.

Industrial a. c. networks affected by harmonics. Application of filters and shunt capacitors.

So the paper presents a scale-FFT magnitude method to separate integer and non-integer harmonics combining FFT with CWT.

Frequency converters generate harmonics and often cable-born noise voltages, mostly common-mode interferences, in the line supply.

Harmonics are not generally produced by the utility, but rather by the customer's equipment.

Free from harmonics, some filter appliances should be used in power network.

The method is improved on to get the detection results in good time when the harmonics are not included in the abnormal content.

The proposed limits are consistent with the compatibility levels of harmonics.

The accurate amplitudes and phases of fundamental and various orders of harmonics could be fleetly obtained by using the algorithm.

Power system equipment and loads which are more sensitive to harmonics.

As thesource of serious EMI, the harmonics are more protruding in the arc weldingconverter, and the research need to be gone deep into.

Harmonics of the fundamental. In many practical situations, however, there is negligible error if.

Then we de script briefly principle and meaning of spherical harmonics and also representation and application in relighting.

The influence of harmonics produced by high-speed electric railroads on grid is introduced.

Research results: Degradation of XLPE cable by water trees gives rise to harmonics in the loss current.

The various harmonics are in resonance in this cavity to different degrees.

Because of its nonlinear characteristics, the APU output current wave contains much more harmonics.

As everyone knows, harmonics frequency and phasor measurement has becomes one important research direction in the field of power system.

Variable deviation angle for best harmonics rejection .

Fundamentals of acoustics, harmonics, and timbre.

Then the structure and the joint weight of FNN could be changed after harmonics estimation. The performance of SCFNN is also optimized.

This paper proposes the flux mapping method using the higher order harmonics of the neutron equation.

The harmonics are reduced below international standards with harmonic filters KEB COMBILINE.

To reduce the current harmonics around switching frequency of the three-phase pulsewidth modulation(PWM)rectifiers, a LCL filter is adopted.

The nonlinear acoustic features, such as harmonics will appear with ultrasound through a damaged material.

DC choke with variable impedance reducing the harmonics as full And partial loads.

This paper presents a new idea of suppressing the harmonics based on the existing solid synchronous voltage harmonics source.

Thus harmonics become a long-term and important issue for investigation, and it is a challenging problem for power system researchers.

See how changing the amplitudes of different harmonics changes the waves.

This creates extra harmonics that are not present in the original signal.

Only those even-order harmonics generated in the output stage itself are canceled.

The ripple or harmonics in the direct voltage are objectionable in many cases.

As a result, we analyze the characteristics of the spherical harmonics spectral method.

Harmonics are deformations to the ideal electrical wave or sine wave.

The main reflection and shrinks slightly and so on the pronunciation aspect's variation including the harmonics several forms.

and the effect of suppression of harmonics by series - connected reactor before capacitor is expatiated.

Commodities fonts core reactor core magnetic circuit because of symmetry, it is not in itself trigger harmonics.

Because of the nonlinearity, randomicity, distributing, and non-placidity, it is difficult to make a veracious measure of harmonics.

An algorithm for analyzing the approximate power harmonics is also presented.

Harmonics are an act of vibration that sustains beautiful music within each and the tribe.

Co-tidal charts were drawn based on the modeled harmonics, and the movements of the tidal waves were discussed and analyzed.

By using the programmable switched-capacitance filters, the harmonics interferences are effectively attenuated.

Low-frequency harmonics are reduced using line reactors.

The skin effect occurred at high-speed asynchronous motor rotor slot becomes more grievous because of the fed inverter's harmonics.

The paper puts forward a new method based on Local Cosine Transform (LCT) for measuring the time varying harmonics in power system.

It leads to higher harmonics amplitudes in lower frequency range.

State-space model provides vivid and direct means for deep analysising the retrieval of harmonics and other problems that associated.

A half-wave symmetric function contains only odd harmonics .

Lei Bai: RAPOO, in German "lucky Persia" the god harmonics, is symbolizing bright and the inexhaustible energy.

Use the FPGA finished high harmonics of signal and various fault signal.

(A Computation Method for Harmonics Caused by Electric Locomotives in Power System, Thesis).

The paper first introduces the basic knowledge of power system harmonics, and points out the importance of studying harmonics.

It is proved that the harmonics of antenna can be suppressed by spur-line very well, and the radiation efficiency of antenna is improved.

In electrical power system, the harmonics that created by many kinds of harmonic sources have made pollution to the whole power system.

The dependent variables are expanded in series of spherical harmonics truncated rhomboidally at wavenumber 15.

A new method to analyze inter-harmonics by time-frequency atom is proposed.

A new system based on virtual instrument to measure transformer harmonics has been discussed, including its hardware and software.

Therefore, it is very important to design a set of electric power system harmonics simulator rig.

By opening and closing your mouth you will hear the various harmonics.

The converter units generate harmonics which flow in the AC and DC lines.

Problems in Detecting FFT Harmonics.

Otherwise, voltage fluctuations and harmonics increment and many other problems will be caused by chosing the wrong compensator.

An non-intrusive power load disaggregation method based on the steady state harmonics is presented in our Tianjin University recently.

A new approach based on artificial neural network (ANN) for measuring power harmonics is proposed.

The fractal dimension of loss current waveform increases because of the growth of harmonics.

The Difference in Discrete Harmonics Synthesized pulse Wave form based on FFT and F. T. Spectrums.

This is fairly commonly utilized, and affects the line frequency component (and odd harmonics).

Harmonics are expensive.

The false scattering and ray effect in spherical harmonics method, including P-1 and P-3 approximation, is studied.

It is widely interested how to construct an active power filter to suppress the harmonics in three phase four wire system.

The more harmonics, the more rich and tonally interesting the wave becomes.

An artificial neural network approach based on MLFNN for measuring harmonics in force system is proposed.

Shunt active power filter (SAPF) is very fit to compensate current source harmonics.

There are harmonics that occur when two magnetic fields encounter each other.

Harmonics are only caused by repetitive and non-linear loads.

At the same time, an auxiliary repetitive controller is added to eliminate periodic current harmonics caused by switching.

Simple harmonics signal is simplest and the most important cyclical signal.

The electric power system harmonics simulator rig is one of the basic tools which are used to study harmonics.

Low-frequency harmonics caused by 6-pulse supplies.

There are several power quality issues such as power surges, voltage sags, outages, harmonics, etc.

The dimmer based on IGBT could reduce the amount of harmonics, so it is the development trend of future.

The harmonics can make other equipments malfunction, and even endanger the grid.

In this way it not only cause serious problem of harmonics pollution, but also decrease the efficiency of power traction and utilization.

Harmonics and intermodulation products which fall within the measurement bandwidth cannot be,

Quadratic nonlinear coupling analyse of two-dimensional harmonics in Gaussian noise with quaternion and hypercomplex

Influence of Harmonics upon the Motor Performance During VVVF Control and Its Measurement

Present Situation of Measuring Technology for Harmonics of Electrified Wire Netting and Its Development

harmonics; chance constrained programming; active filter; passive filter; optimal allocation;

Analysis of Two-dimensional Quadratic Coupled Harmonics in Multiplicative Noise

Harmonics Pollution of AC Frequency Conversion System Against Safety Monitoring and Controlling System and Controlling Measures

Advances in Theory of Forestry Harmonics and Preliminary Analysis of Sustainable Development Strategy

Study of a Novel Harmonics Detecting Method

Resources and Environment Harmonics(Green) Mining and its Technological System

Harmonics of Variable Frequency Speed-governing System and Its Countermeasures

Design of a Portable and Intellectualized System for Harmonics Detector

Application of phase lock multiple frequency synchronous sampling and quasi-synchronous sampling to measurement of harmonics

Digital detecting technique for harmonics current and its computer simulation

Harmonics Detection With a Digital Lock- in Amplifier Controlled by Computer

Damages of Ferromagnetic Resonance and Improvement in Harmonics Elimination Techniques in Substations

Series Active Power Filter Compensates Current Harmonics and Source Voltage Unbalance Simultaneously

Experimental Study of Harmonics Detection by Use of A Digital Lock-in Amplifier

Simplified Spherical Harmonics Method for Self-Adjoint Angular Flux Transport Equation in Unstructured Geometry

False Scattering and Ray Effect in Spherical Harmonics Approximation for the Radiative Transfer Equation

Simulation Study of DC Transmission System Based on Auto-Compensating and Harmonics Shading Converting Transformer

The Principle and the Application of the Synchro-generator with Quadrature Harmonics Brushless Magnetized

Harmonics Measurement and Analysis of the Consumer's Typical Medium-frequency Induction Furnaces

Simplified Spherical Harmonics Method for Neutron Time-Space Kinetics Calculation in Complex Environment

Application of the Super-Resolution Spectral Estimation Theory to the Harmonics and Interharmonics Analysis in the Electric Power System

The Harm of the High Frequency Harmonics of the Power Grid and its Restrain Methodology

Definition and Digital Algorithms for Dielectric Loss Factor of High Voltage Power Apparatus under Harmonics Condition

Study of Harmonics Control for Cascade Multilevel Inverter

Theory Simulation of High-Order Harmonics Output in Two Special Modulated Fibers

Predicting and calculating of the harmonics of no-load voltage of salient-rotor synchronous generators

Analysis of Harmonics and Negative Sequence Influence on Jiangxi Power System by Electrified Railway from Zhejiang to Jiangxi

The Application of Virtual Instrument Technology Combined with MATLAB in Harmonics Measurement System

Research on the reduction of input current harmonics of a single - phase power supplies

Distortions of the Supply Voltage and Derivation Principle for Harmonics Current Limits

Formation and harm of harmonics in power supply system and its protection measurement

Study of Reducing Zero-Sequence Third Harmonics by Zig-Zag Transformer

Study of the measurement and analysis system for online harmonics based on virtual instruments

Harmonics in Low-Voltage Distribution Systems in Petrochemical Enterprises and Treatment

Design scheme of secondary and fifth harmonics suppressor transformer differential relay

General guide on harmonics and Interhamonics measurements and Instrumentation, for power supply systems and equipment connected thereto

Accurately Understood and Used IEC Publication Raising Management Level for Network Harmonics

Discussion on the technical measures for harmonics source governing and management in the power supply utilities

Harmonics Inhibition Methods and Measurement for Frequency Converters

Determination for Brake Ratio of Secondary Harmonics and Regulation of Differential-current Quick Break

Characteristics of Harmonic Sources and Restraint of High-order Harmonics in Power Distribution Network

Analysis of Quality of Electric Energy Supply of Power Supply and Distribution Systems and Harmonics Suppression

Discussion on the emergence of harmonics of inverter and its damages and solutions

Qinghai Power Grid Harmonics Wave Situation and Its Management Status

Using Least Square Method to Improve the Accuracy of Quasisynchronous Sampling Harmonics Analysis

Harmonics retrieval in correlative multiplicative and additive noise

Two-Dimensional Harmonics Parameters Estimation Using Third-Order Cyclic-Moments

Harmonics influence and suppression in conversion-transducer connect cable

The Design and Realization of the Analytical Meter for Harmonics Energy Measuring Error

Designed Plan for Improving Accuracy of Quasi-synchronous Sampling Harmonics Analysis

Selection of harmonics detection components in single-phase parallel hybrid active power filter

Study of Influence on Harmonics in Shanghai Power Grid Caused by Subway Transportation Connected in

Discussion on Causes and Suppression Methods of the Transducer Harmonics

Spherical Harmonics Method for Object Image Synthesis under Changing of Illumination

Simulation Study on Output Harmonics by PWM Converter in Variable-Frequency Adjustable-Speed System

the current harmonics produced by these loads produce voltage harmonics that partially correct their ITHD through attenuation effect;

Engineering Design of Harmonics Treating of Continuous Rolling Production Line

Influence of Harmonics of Parallel Capacitor and Its Solution

Care Should be Taken to the Harm of Harmonics in Electricity Engineering in Construction

An Improved Second-order Harmonics Restraint Method for Inrush Currents with Tracking Ability

Discretizing Fractional Frequency of Harmonics Current and Obtaining the Compensation Command Signal

A Method to Detect Fundamental Component by Symmetrical Component under Inter-Harmonics

The Synchronous Motor Branch Model Calculating the Influence of Several Times Harmonics

Azimuthal Anisotropy at the Relativistic Heavy Ion Collider: The First and Fourth Harmonics

Affects of Harmonics in Power System and its Measurement Methods

Harmonics Improving Methods in Practical Application

Application of capacitor and series reactor bank for preventing harmonics over-voltage

The imagery and symbols represent the harmonics and destiny of the new Earth-Star 'Terra';

Harmonics in High-Voltage Frequency Converters and Detection Standards

Frequency domain analysis of wavelet transform in harmonics detection,

The paper analyzes the concepts of harmonics, measure index and methods of mathematic analysis;

Analysis of Electricity Energy Meter Considering Harmonics

Musings about the Harmfulness and Comprehensive management of Electric Power Harmonics

Geometric Applications of Fourier Series and Spherical Harmonics

tests regarding non sinusoidal currents resulting from harmonics

The Simulation Approach of Harmonics Magnifying Controlling in Power System

Analysis on High Harmonics Suppression Methods in Power Distribution System

Harmonic Retrieval and Nonlinear Frequency-Coupled Harmonics in the Complex Noise

Harmonics analysis and simulation research of multi-cell-cascade multi-level inverter

Analysis and Measurement of Input Current Harmonics of Electronic Energy-saving Lamps

A Novel Method for Power System Inter-harmonics Detection with Anti-aliasing Wavelet Transform

Harmonics Filter Parameter Design of the Rectification Set

Approximate Synchronous Method for Harmonics Analysis on Power System

Industrial Application of Active Elimination Unit for Power Harmonics

Quantitative research on higher order harmonics in metrology beamline

Two-dimensional harmonics frequency estimation in additive gaussian noise background based on quaternion and hypercomplex

Application of wavelet transform to harmonics detection in power systems in power systems

Inquire on the establishment of harmonics monitoring and prevention system

Application of Active Harmonic Filters in Harmonics Suppression

The Practice of Harmonics Supervision in Regional Power Supply Enterprises

Research on a Fractional-harmonics Analysis Algorithm

Harmonics Analysis And Measures to Restrict Harmonics for Electric Power System

Evaluation of Harmonics Limits in Distribution System for Large Office Building

SNR enhancement for the second harmonics in tissue imaging by the use of the pulse inversion technique

Design of a High-precision and Real-time Power Harmonics Analyzer

Cumulant Projection Method for Two-Dimentional Harmonics Frequency Estimation in Colored Non-Gaussian Noise

Design of an X-band Harmonics Mixing Frequency Synthesizer

Analysis of the Harm of Harmonics in Power Supply System and the Application in the Mine Production

The controlling performance analysis of the PMSM taking into consideration of the rotor flux harmonics

Spectral Analysis of Model Climate with Spherical Harmonics Function

Analysis of multiple scattering theory by expanding on the spherical harmonics

Harmonics Control of Electric Arc Furnace and Its Effects

The Main Features of Music Harmonics Language of European Romanism

Frequency Estimation and Tracking for Harmonics Analysis of Power Systems

Strengthening the Monitoring and Regulating for Harmonics in Power System

AMR Magnetic Head Design with Eliminating Harmonics and Sinusoidal Wave Output

Simulation Analysis of Nonlinear Load Harmonics Source in Water Heating System

Instantaneous harmonics detecting for three-phase circuits based on ip -iq calculating mode and discrete integral average filter algorithm

New Artificial Neural Network Approach for Measuring Harmonics

Analysis of the catenary side harmonics on AC electric locomotives

Harmonics and Their Measurement in Distribution Network