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Electromagnetic interference is one of the critical problems to the safety and stability of HVDC systems. When the ±800 kV converter station changes the operating states, the breaker and switcher operations will cause sharp voltage and current transient in the primary circuit and interference into the secondary system. The characteristics of switching EMI under different system operation statuses...
This paper analyzed the electromagnetic disturbances in the driving system of a fuel cell bus. First, the distribution of the disturbance source in the driving system surveyed by measurement was introduced. Then, the characteristics of the conductive emission were presented. Based on the multiconductor transmission line model, the paper analyzed the electromagnetic conductive interference in the driving...
The Ultra High Voltage DC power transmission technique is developed quickly in China but used barely in the world. Corona phenomenon in high altitude region is more serious, and corresponding electromagnetic environment is more severe as well. A UHVDC test lines are completed for tests in Kunming, China, with an altitude of 2100 m. An automotive electromagnetic environment testing system was installed...
The wide-band frequency electro-magnetic (EM) noise is generated during turn-on and turn-off processes of thyristor valves in converter stations. It will be conducted along the primary circuitry, and may interfere with secondary systems by the way of conducted and radiated coupling. The plusmn800-kV UHVDC transmission project is one of newly developed technique and used barely in the world. The electro-magnetic...
Transient processes are generated by operations of disconnect switches and circuit breakers in the AC side of converter stations. Several trips in different plusmn500-kV HVDC converter stations in china happened recently. Characteristics of transient Electromagnetic Interference due to switching operations are summarized based on onsite tests in a practical converter station. Measurements are performed...
The wide-band frequency EM noise is generated during the processes of firing and turn-off of thyristor valves in converter stations. It will be conducted along the primary circuitry, and may interfere with secondary systems by the way of conducted and radiated coupling. The plusmn800-kV UHVDC transmission project is one of newly developed technique and used barely in the world. The EMI problem is...
The AC voltage measuring system is one of the most importance paths for electromagnetic interference propagation in HVDC converter station. In this paper, a wide-band simulation model is proposed to analyze the electromagnetic interference propagation in it. Experimental study is also carried out to obtain the EMI noise level in measuring system. Comparing with experimental results, the calculation...
The power line carrier (PLC) system used in HVDC converter station is connected directly to the primary system via coupling devices, and may be interfered by the electromagnetic noise produced by valves or switch operation procedure. In this paper, the EM noise in PLC system of plusmn500-kV HVDC converter station is measured in the steady state. The transient disturbance during the switch operation...
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