As distributed photovoltaic systems (DPVS) connected to the distribution network, its associated influences on operation, control and dispatching management also gradually highlight, among them the reactive voltage control is one of the more significant problems. The power output of the DPVS is affected by the light, climate and other natural factors, which makes it have strong randomness and intermittent and volatility and be difficult to predict. In addition, it is hard to measure equipment and control equipment for each DPVS when huge number of DPVSs access to distributed network, thus parts of DPVSs cannot be observed and scheduled. In view of this, considering the unobservable and un-dispatching ability, a local adaptive voltage control strategy is proposed for the DPVS, correspondingly a voltage expectations adaptive adjustment scheme is proposed for various operation modes of distribution networks to achieve local voltage control in an intelligent and adaptive manner. Based on PSCAD/EMTDC electromagnetic transient, simulation results of many cases show the effectiveness and robustness of the proposed scheme.