Prediction Analysis of Electromagnetic Interference Based on Gray Prediction Theory

2010 ◽  
Vol 44-47 ◽  
pp. 3731-3735
Author(s):  
Hui Juan Zhang ◽  
Yan Ting Wang ◽  
Shi Tao Wang ◽  
Meng Wu
Keyword(s):  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Simulation Software ◽  
Electromagnetic Simulation ◽  
Test Results ◽  
Prediction Theory ◽  
Prediction Analysis ◽  
Electromagnetic Transient ◽  
Gray Prediction ◽  
Electromagnetic Transient Simulation

The paper introduces a new method for prediction of electromagnetic compatibility in the power system, and use the Electromagnetic simulation software ATP. By comparing the actual test results to the simulation results, it is proved that electromagnetic transient simulation is reliable and effective. It also introduces the Gray prediction theory to predict the next Electromagnetic Interference (EMI) of the substation. It is high practical to research and analyze the substation electromagnetic compatibility, and feasible to use the Gray prediction theory with multivariable for the model EMI prediction analysis.

Study on Dynamic Stability, Commutation Failure of Multi-Infeed HVDC Power Transmission System

2011 ◽  
Vol 347-353 ◽  
pp. 2717-2723
Author(s):  
Zhi Dong Wang ◽  
Lian Guang Liu
Keyword(s):  
Simulation Model ◽  
Dynamic Stability ◽  
Transmission Lines ◽  
Large Scale ◽  
Transmission System ◽  
Simulation Software ◽  
Transient Simulation ◽  
Electromagnetic Transient ◽  
Commutation Failure ◽  
Electromagnetic Transient Simulation

The electromagnetic transient modeling method was presented for the system, the system equivalent and model treatment were also concerned. The EMTDC (electromagnetic transient simulation software) was used to establish the simulation model covered a total of 5 HVDC transmission lines, including a ±800kV UHVDC transmission system from Yunnan to Guangdong. The use of detailed converter model can solve the problem of limitations in previous studies. The research focused on the dynamic stability and commutation failure when kinds of faults occurred in AC/DC system. The result of the work has provided a theoretical foundation for such system, also provided a feasible way for the dynamics study of large-scale multi-infeed HVDC system by using of the electromagnetic transient simulation model.

Micro-Defects Test Simulation Analysis and Experiment Research under Alternating Electromagnetic Excitation

2013 ◽  
Vol 798-799 ◽  
pp. 452-455
Author(s):  
Xia Yu ◽  
Wei Ming Zhang ◽  
Zhong Chao Qiu ◽  
Cheng Feng Chen
Keyword(s):  
Simulation Analysis ◽  
Crack Depth ◽  
Simulation Software ◽  
Good Effect ◽  
Electromagnetic Simulation ◽  
Test Results ◽  
Current Field ◽  
Electromagnetic Excitation ◽  
Simulation Results ◽  
Alternating Magnetic Fields

Alternating current field Measurement is one of the important progresses about electromagnetic nondestructive testing in recent years. Alternating magnetic fields excitation testing model is established by using electromagnetic simulation software ANSOFT, a flat plate crack defects are simulated. By analyzing its principle, crack depth and the width change influence on test results, finally the simulation results are verified by the method of experiment. The experimental results are consistent with the simulation results. The results show that this differential probe has good effect on crack defects test.

Electromagnetic Compatibility Analysis Method for FBAR Devices

2015 ◽  
Vol 719-720 ◽  
pp. 452-460
Author(s):  
Yang Gao ◽  
Bin Zhou ◽  
Yi He ◽  
Wan Jing He
Keyword(s):  
Electric Fields ◽  
Electromagnetic Interference ◽  
High Frequency ◽  
Electromagnetic Compatibility ◽  
Effective Permittivity ◽  
Element Model ◽  
Acoustic Resonator ◽  
Simulation Software ◽  
Property A ◽  
Compatibility Analysis

With the increasing of resonant frequency and integration of film bulk acoustic resonator (FBAR), the electromagnetic interference (EMI) of FBAR devices appears to be extremely important. The electric fields of the common electrical model and finite element model are assumed to be quasi-static and cannot simulate the electromagnetic (EM) property. A 3-D EM model of FBAR is achieved by means of high frequency EM simulation software HFSS. A real-time simulation of EM distributed effects, EM coupling and piezoelectric effects is achieved by employing an effective permittivity in the EM model. The effects of the high frequency EM distributed effects and the EM coupling on resonant characteristics are analyzed. By optimizing the distance between FBAR and components, introducing substrate materials with different permittivity, the EM coupling is effectively reduced.

scholarly journals Accurate Evaluation of Steady-State Sheath Voltage and Current in HVDC Cable Using Electromagnetic Transient Simulation

Energies ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 4161 ◽  
Author(s):  
Mansoor Asif ◽  
Ho-Yun Lee ◽  
Kyu-Hoon Park ◽  
Bang-Wook Lee
Keyword(s):  
Steady State ◽  
Simulation Software ◽  
Electromagnetic Transient ◽  
State Evaluation ◽  
Electromagnetic Transient Simulation ◽  
Utility Companies ◽  
Charging Current ◽  
Hvdc Line ◽  
Dc Bias ◽  
Current Ripple

The current and voltage in High Voltage DC (HVDC) line is not pure DC but contain superimposed ripple components. The current ripple in core of HVDC cable magnetically induces a voltage in the sheath, whereas the voltage ripple causes the flow of charging current from core to sheath. The knowledge of sheath voltage is necessary to ensure compliance with the specification of utility companies. In this work, we have reported that the models available in commercial Electromagnetic Transient (EMT) simulation software erroneously introduce a DC bias in steady-state sheath voltage and sheath current. We have also demonstrated that by removing the DC bias accurate steady-state evaluation of sheath voltage and sheath current is possible. Additionally, we have analyzed the sheath voltage and currents in HVDC cable considering different cable lengths and sheath grounding schemes. It has been found that grounding the sheath at the terminal of HVDC cable can limit the sheath voltage to acceptable levels without causing substantial joule loss in the sheath.

Electromagnetic - Electromechanical Transient Hybrid Simulation of Deyang-Baoji HVDC System Based on ADPSS

2013 ◽  
Vol 805-806 ◽  
pp. 935-940
Author(s):  
Fan Tang ◽  
Guo Liang Su ◽  
Dong Xiang Li ◽  
Yu Hong Wang
Keyword(s):  
Large Scale ◽  
Hybrid Simulation ◽  
Simulation Software ◽  
Transient Simulation ◽  
Power System Simulation ◽  
Electromagnetic Transient ◽  
Hvdc System ◽  
Simulation Speed ◽  
Electromagnetic Transient Simulation ◽  
Scale Grid

three kinds of digital programs used in power system simulation are summarized in this paper. The electromagnetic and electromechanical transient simulation software ADPSS is introduced. Electromagnetic transient simulation, electromechanical transient simulation and electromagnetic-electromechanical transient hybrid simulation are performed respectively on Deyang-Baoji ±500KV HVDC system. The simulation result shows that the electromagnetic-electromechanical transient hybrid simulation has the advantage of electromagnetic transient simulation and electromechanical transient simulation. It can effectively analyze the process of the local electromagnetic transient in large-scale grid. The simulation speed is fast and the result is accurate and reliable.

Analysis of Electromagnetic Interference in Rectifier and Inverter System

2014 ◽  
Vol 536-537 ◽  
pp. 1547-1550
Author(s):  
Qiu Qi Ding ◽  
Min Tao ◽  
Yun Xiang Jia
Keyword(s):  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Test Results ◽  
Interference System ◽  
Interference Test ◽  
Design And Application

Aiming at the problem of electromagnetic interference in design and application of electronic rectifier and inverter system, introduces the electromagnetic interference and electromagnetic compatibility characteristics of common circuit, the interference test of rectifier and inverter system, puts forward the products it has produced inhibition method of interference. The test results show that the method can reduce electromagnetic interference system greatly.

scholarly journals Influence of Aircraft Power Electronics Processing on Backup VHF Radio Systems

Electronics ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 777
Author(s):  
Jan Leuchter ◽  
Radim Bloudicek ◽  
Jan Boril ◽  
Josef Bajer ◽  
Erik Blasch
Keyword(s):  
Power Electronics ◽  
Electromagnetic Interference ◽  
Communication Systems ◽  
Electromagnetic Compatibility ◽  
Intermediate Frequency ◽  
Radio Communication ◽  
Very High Frequency ◽  
Switching Power ◽  
Radio Systems ◽  
The Impact

The paper describes the influence of power electronics, energy processing, and emergency radio systems (ERS) immunity testing on onboard aircraft equipment and ground stations providing air traffic services. The implementation of next-generation power electronics introduces potential hazards for the safety and reliability of aircraft systems, especially the interferences from power electronics with high-power processing. The paper focuses on clearly identifying, experimentally verifying, and quantifiably measuring the effects of power electronics processing using switching modes versus the electromagnetic compatibility (EMC) of emergency radio systems with electromagnetic interference (EMI). EMI can be very critical when switching power radios utilize backup receivers, which are used as aircraft backup systems or airport last-resort systems. The switching power electronics process produces interfering electromagnetic energy to create problems with onboard aircraft radios or instrument landing system (ILS) avionics services. Analyses demonstrate significant threats and risks resulting from interferences between radio and power electronics in airborne systems. Results demonstrate the impact of interferences on intermediate-frequency processing, namely, for very high frequency (VHF) radios. The paper also describes the methodology of testing radio immunity against both weak and strong signals in accordance with recent aviation standards and guidance for military radio communication systems in the VHF band.

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