Study on the Impact of PV Generation on Voltage Sensetivity of Smart Distribution Network Feeder

Based on the distribution networking feeder, the sensitivity matrices of voltage fluctuation in distribution feeder are propposed with and without PV integration, and the relationship between vlotage and load of different nodes is established. In the same time, the validity and the correctness of the sensitivity matrix is verified through simulation on the long-distance radiant multi-branch distribution feeders. The sensitivity matrix can be used to analyze the node voltage changes caused by integration of the distributed PVs, and it is also very helpful for the long distance feeders in remote areas in predicting the possibility of beyond-limit voltage. Similarly, the sensitivity matrix can be extended to the analysis of the node voltage of distribution network with multible feeders, reactive compensation and planning of distributed PVs. And it can also be used to study the distribution network power confidence interval criterion for judging the voltage fluctuation margin, which can be used as the criterion for distribution network feeder automation and distribution network self-healing load transfer as to improve the voltage quality and power supply reliability of the distribution network.