With the development of distributed photovoltaic power station construction, from the example of Jinzhou city level distributed building integrated PV demonstration project, this paper introduces a new type of distributed PV application mode, namely the grid co-existence new mode. And then it presents an integrated multi-modal PV inverter device. The divice differs from traditional inverter equipment, except for providing inverter functionality with the immediately spent of electricity generated, at the same time, supplying on-spot reactive power and harmonic compensation, even as a special compensation device when there is no sunshine, thus affecting the operation, control and protection of the distribution network.