Research On Measurement And Evaluation Of The Performance Ratio Of PV Water Pump System

Photovoltaic(PV)water pump is an important application field of photovoltaic systems,it has been developing rapidly in drought resistance,improvement of people's livelihood and conservation of soil and water in recent years.The performance ratio of PV water pump system is an important indicator of the performance of the system.In order to make photovoltaic pumping systems better serve the agriculture and live,it is necessary to explore and study it.The measurement and evaluation method of the performance ratio of PV water pump system are analyzed and researched by taking three-phase ac PV water pump system as object.A set of scientific and reasonable measurement scheme of the performance ratio of PV water pump system is designed based on the in-depth study of water pump's measurement method and the definition of the performance ratio of PV water pump system.The experimental platform is built up and test experiment has been conducted for nearly two months.The performance ratio of PV water pump system is defined based on the definition of the performance ratio of PV power generation systems in IEC 61724 standard.An evaluation rating standard of the small PV water pump system's performance ratio is established.The main factors which influence the performance ratio of PV water pump system are analyzed based on the experimental platform.Get system performance ratio,every part's efficiency and energy loss after calculating the experimental data.Study the influence proportion of PV array,pumping inverter controller and water pump,which are 0.211,0.236,0.553,on the performance ratio of PV water pump system,combining with contrast experiments.It indicates that the pump has the greatest impact on the system performance ratio,followed by inverter controller,PV arrays have the weakest effect on it.On the basis of the running PV water pump,create an evaluation index system of the performance ratio of PV water pump system.Determine and evaluate the performance ratio of PV water pump system by using the analytic hierarchy process(AHP)and fuzzy comprehensive evaluation method,and obtain evaluation rating of the performance ratio level of PV water pump system,which is ‘general' level.The comprehensive evaluation result is consistent with the calculation result,verifying the rationality and reliability of the comprehensive evaluation system.The research on measurement and evaluation of the performance ratio of PV water pump system is basically accomplished,which provides certain reference value for the analysis of the performance ratio of PV water pump system and can be used as a reference for the optimal design of PV water pump system.