Abstract
The uncertainties in the distribution network makes it difficult to accurately obtain the system state and realize system optimal control. The development and application of synchronous phase measurement technology helps to achieve reliable operation of the distribution network with spatial-temporal uncertainties. The Lingang smart distribution network demonstration project is operating based on the synchronous phase measurement application technology system for smart distribution networks. First, this paper introduces the basic construction of the demonstration project. Second, the key techniques for state estimation in distribution networks based on PMU measurement are summarized. Then the project integration framework design and state estimation application scheme are presented respectively. Finally, the effectiveness of the state estimation module in the demonstration project is analyzed. The results indicate that the state estimation can accurately estimate the system operating state. The state estimation is performed every 5 seconds in this project. Compared with the traditional power system state estimation, the proposed method significantly shortens the calculation interval of the state estimation and can quickly track the states of the distribution network.
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