Regional distributed photovoltaic fault diagnosis system and method for access power distribution network

Abstract

The invention discloses a regional distributed photovoltaic fault diagnosis system and method for an access power distribution network. The system comprises a fault information detection sub-system, a fault data processing sub-system, a fault recognition sub-system, a fault model base sub-system, a fault alarm display sub-system and a fault feedback sub-system, wherein a photovoltaic grid connected point and power grid information are automatically obtained through the fault information detection sub-system and the fault data processing sub-system; fault information screening is carried out through classification, analysis and conversion; and the system is capable of automatically judging the fault type, analyzing the fault reasons, locating the fault position, automatically alarming at a fault point after judging the fault, and displaying detailed fault information according to the fault information processing result. The regional distributed photovoltaic fault diagnosis system provides a support for establishing a distributed photovoltaic power distribution network management system, and the operation security of the power grid is ensured.

Description

technical field [0001] The invention relates to a regional distributed photovoltaic fault diagnosis system and method connected to a distribution network, belonging to the technical field of distributed photovoltaics. Background technique [0002] As more and more distributed photovoltaics are connected to the distribution network, it has a great impact on the security and stability of the distribution network. To this end, the State Grid Corporation of China has successively formulated the "Technical Regulations Related to Distributed Photovoltaic Power Generation Access to Distribution Networks (Provisional)" and "Technical Regulations Related to Distributed Power Generation Access to Distribution Networks (Revised Edition)", which stipulates that distributed photovoltaic power generation The technical requirements for power generation to be connected to the distribution network try to alleviate the impact of distributed photovoltaic access on the distribution network. ...

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Problems solved by technology

However, with the large-scale access of distributed photovoltaics, on the one hand, the characteristics of distributed photovoltaics are very different from those of centralized power stations due to their large number and scattered configurations, and the existing photovoltaic fault diagnosis system only monitors a single Power stations cannot monitor the faults of multiple distributed photovoltaics at the sam

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