An island protection method for a monitoring system of a distributed generation grid-connected system

Abstract

The invention relates to a monitoring system for a distributed power generation grid-connected system, including: a distributed power generation grid-connected interface device, which completes the monitoring of the distributed power generation system and loads, uploads monitoring information to the power dispatching agency, and executes the monitoring of the power dispatching agency. Remote control command; monitoring terminal, used to detect the voltage, current, power value and grid-connected switch status of the distributed power grid-connected point and load point, and receive the remote signal quantity of the distributed power grid-connected controller; the power dispatching mechanism, used to realize The operation status monitoring and control of the distribution network connected to the distributed power supply, and according to the scope of the task, the energy management operation of the distributed power supply is realized. The invention also discloses an island protection method of the monitoring system of the distributed power generation grid-connected system. The invention does not need to set up a special communication network, which reduces the system cost; in the case of adding a distributed power supply to the system, the monitoring system does not need to increase new hardware investment, and can meet the requirements of flexible access of the distributed power supply.

Description

technical field [0001] The invention relates to the technical field of a distributed power generation grid-connected system based on carrier communication, in particular to an island protection method for a monitoring system of a distributed power generation grid-connected system. Background technique [0002] Affected by the national new energy policy, the penetration rate of distributed power represented by distributed photovoltaics on the traditional power consumption side continues to increase. Due to the small installation capacity of the distributed power supply unit and the randomness of the installation location, it is not economical and flexible to use a dedicated optical fiber to monitor the distributed power supply. At present, the existing solutions implemented in the form of cloud platform can complete the monitoring function of distributed power supply electrical quantity. However, the control of distributed power sources through the cloud platform cannot meet...

AI Technical Summary

Problems solved by technology

However, the control of distributed power sources through the cloud platform cannot meet the requirements for real-time and security in power operation control.

Distributed power sources are equipped with island protection, but when the penetration rate of distributed power sources in the region continues to increase, island protection based on distributed power sources will not be able to give full play to the advantages of distributed power capacity and reduce the cost of installing distributed power sources for distribution networks. The economy brought about, and the reliability and safety of the distribution network power supply cannot be improved

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