An Active Distribution Network Net Load Current Composite Directional Protection Method Based on 5G

With the large number of access to DG, the structure of the distribution network has become more and more complex. It affects the performance of distribution network protection, makes the traditional current protection rectification match more difficult, and even difficult to meet the requirements of protection. An active distribution network net load current composite direction area protection method based on 5G is proposed to effectively solve the problem of active distribution network protection matching difficulty. Firstly, an active distribution network net load current composite direction protection architecture based on 5G is constructed. 5G technology and edge computing are utilised to improve the data transmission capability and processing capability. Secondly, a new method of active distribution network net load current composite direction protection is proposed. The powerful computing capability of the edge side is used for net load prediction, and the difference between the net load prediction current and the fault current is used as the protection start value, which reduces the influence of the intermittency and randomness of the distributed power supply on the protection setting value. Using the improved node matrix containing distributed power sources, distributed power source nodes and their upstream and downstream nodes are effectively identified. The fault direction information of multiple ends is used as the action logic judgement of the protection to quickly judge the fault line. Finally, the reliability and speed of the proposed method are verified by the improved IEEE33 node distribution network, which has certain application value for the protection of active distribution networks.