Research on power limiting strategy of PV Power generation based on MPPT and power loop

Abstract

With the massive connection of photovoltaic power plant to the electrified wire netting, the influence of peak residual power brought by the generation peak on the electrified wire netting is more and more obvious, and it will endanger the safety of the electrified wire netting and equipment in serious cases. Therefore, it is necessary to flexibly limit the power of photovoltaic power generation for purpose of reduce the influence on the electrified wire netting during peak power generation. In this paper, a combined control policy based on maximum power tracking and power loop is proposed to achieve flexible limit of photovoltaic power plant. In this paper, the realization principle of photovoltaic power limiting policy is described in detail, and then a single-phase two-stage photovoltaic grid-connected system is built on PLECS simulation platform to simulate and verify the power limiting control policy, and the analysis results prove the availability of the policy.