Comprehensive energy efficiency evaluation management system and method for alternating-current and direct-current renewable energy system

Abstract

The invention relates to a comprehensive energy efficiency evaluation management system and method for an alternating-current and direct-current renewable energy system. The system comprises a cloud network and an energy efficiency management layer connected with a plurality of distributed metering acquisition systems. The system uploads on-site metering acquisition system data of each AC / DC microgrid to a cloud energy efficiency management layer; energy efficiency data calculation, analysis and management are carried out respectively; application functions of equipment parameter management, energy efficiency monitoring, energy efficiency analysis, renewable energy power generation monitoring, energy efficiency evaluation result guidance and the like are applied, energy efficiency index evaluation and display of a plurality of alternating current and direct current system levels, a single region level and an equipment level are realized, and guidance suggestions are provided for complementary optimization and operation energy conservation and emission reduction of a system energy management system by utilizing an energy efficiency evaluation result. The comprehensive energy efficiency evaluation management system is distinct in design hierarchy, simple in structure and easy to realize, saves the network communication cost, is convenient for a user to use, and provides an effective cloud energy efficiency management solution for a multipoint distributed energy system.

Description

technical field [0001] The invention relates to the technical field of AC / DC microgrid operation evaluation, in particular to a comprehensive energy efficiency evaluation management system and method for AC / DC renewable energy systems. Background technique [0002] Compared with the traditional pure AC system or DC system, the AC-DC hybrid distributed renewable energy system can not only solve the problem of difficult grid-connected control of various distributed energy sources, but also reduce the use of power electronic devices and improve system efficiency. It will become the development trend of micro-grid in the future; AC-DC hybrid micro-grid includes a variety of renewable energy power generation equipment, energy conversion equipment, storage equipment, and load equipment. The comprehensive energy efficiency evaluation of AC-DC hybrid systems containing multiple distributed renewable energy sources, and the loss monitoring and energy efficiency analysis of multi-ener...

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Problems solved by technology

[0003] At present, the research on the energy efficiency evaluation of the AC-DC hybrid system mainly focuses on two aspects. On the one hand, it studies the power generation efficiency evaluation on the supply side; on the other hand, it focuses on the energy efficiency of the AC-DC hybrid distribution network; There is a lack of research on the comprehensive evaluation system of units, lines, power electronic voltage devices, and load equipment, which has limitations in guiding the complementary optimization and coordination of AC-DC hybrid systems; research on comprehensive energy evaluation of AC-DC hybrid systems containing multiple distributed energy sources The system and method can accurately evaluate the energy utilization efficiency of the system, clarify the key nodes and equipment of system energy loss, and have important guiding significance for locating system faults, optimizing operation and configuration upgrades

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