| The large-scale utilization of new energy power generation is the trend of power system development in the world today.The rational utilization of new energy will alleviate the shortage of energy,curb environmental pollution and improve people’s living standard.But what can not be ignored is that the new energy power generation has the characteristics of uncontrollable primary energy and unstable output power.It is necessary to study the influence of higher penetration rate on the safe and stable operation of the power grid.In this paper,the principle and composition of photovoltaic power generation system are introduced firstly.As we all know,photovoltaic power generation system mainly includes charge and discharge controller,inverter and battery and solar cell(assembly);At the same time,according to the needs of various occasions to be divided,solar photovoltaic power generation system can be divided into three types,namely,hybrid photovoltaic power generation system,GRID-connected photovoltaic power generation system and independent photovoltaic power generation system;Then the application of PV power generation technology in China is summarized,and the advantages and disadvantages of each development and application stage of PV power generation system are analyzed,and finally the main trend of future development is the large-scale grid-connected photovoltaic power generation system.Then,the typical structure of PV access rural distribution network and the PV Power Access specification of the State Grid company are described in the rural distribution network example.In this paper,the problem of the difference of the PV power generation at the end voltage,the unbalanced three-phase voltage and the same condition is summarized.This paper analyzes the cause of the problem,puts forward the measures to solve it,and the Power Quality Improvement scheme of the corresponding problems,and finally verifies the validity of the proposed method. |
PDF Full Text Request