As the most important renewable clean energy

small hydropower has been greatly developed.After the hydropower is connected to the distribution network

the topology of the original network is changed. In addition

its own defects will inevitably affect the voltage quality of the distribution network. In this paper

the busbar voltage of a 35 kV substation integrated into a group of small hydropower station in southern Shaanxi is taken as the research object. The adverse effects on the voltage quality of the busbar under different operating modes are analyzed after the special line of the small hydropower unit is connected to the substation. The solution to the problem of using shunt reactors to compensate and the coordinated operation between hydropower units is put forward. The voltage quality under different compensation modes is compared and analyzed. At the same time

using PSASP software to establish the simulation model of the power system

the system and its solutions are simulated and the results show that the corresponding conclusions and solutions correctness and effectiveness of access to small hydropower distribution network stability voltage quality provides a useful reference.