Optimization of control strategies for distributed photovoltaic

Currently, in order to use low-carbon and clean energy as much as possible, distributed photovoltaic for this large-scale access to the distribution grid, but this will also cause a certain impact on the distribution system, affecting the stability of the power system, mainly in the voltage overruns are frequent and the grid power is difficult to balance. Especially when the PV high power grid-connected, the voltage will be out of the normal range, and there are uncertainties such as randomness and volatility in distributed PV, which leads to a certain impact on the power balance of the grid. At present, the grid company camping and distribution system of distributed PV grid-connected operation control means is relatively single, the timeliness and comprehensiveness of the operation data is lacking, and there is a lot of uncertainty in the ability to participate in intelligent regulation and control. In view of the above problems, this paper establishes the parameter optimization model of inverter active and reactive power control strategy, and searches for the best parameter combinations under various working conditions through the mathematical derivation of voltage sensitivity, so as to guarantee the highest power quality of the grid, and maximize the improvement of power quality and operation efficiency of the grid. Realize distributed PV integrated, refined management, enhance the low-voltage distributed PV resources “observable, measurable, adjustable, controllable” ability.