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Intermittent earth faults occur frequently in urban distribution networks, causing overvoltage in the whole system. This paper first presents the distribution characteristics of transient overvoltage caused by intermittent earth faults. Overvoltage level at the end of a sound line turns to be higher than that of the faulted line. In resonant grounding system with Petersen coil based on thyristor controlled...
An equipment comprehensive utilization index considering power system security and operating mode was provided, and a distribution system expansion planning method based on this index was proposed. The expansion planning method takes “effective use of existing and additional equipment resources” as the guiding ideology, and makes full use of the historical operation data to realize the distribution...
Smart grid demonstration projects are being carried out all over the world, but none of them involves integrated demonstration of large island-based power grid. This paper analyzes the demand for smart grid in Hainan, proposes a 4-layer technical architecture including generation, transmission, distribution, and consumption. On this basis, the core business of the overall technical architecture is...
The regional smart grid demonstration project in Hainan is a comprehensive integration demonstration project involving the whole Hainan power grid. Based on smart grid construction need analysis, this paper proposes a comprehensive integrated technology framework which includes generation, transmission, transformation, distribution and charging technology of electric vehicle. Then, the content of...
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