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Interconnected converter power control method in master-slave control hybrid microgrid

A technology of power control and converter, applied to AC networks with the same frequency from different sources, etc., can solve the problems of inability to realize mutual support of power on both sides, poor adjustment accuracy, etc., and achieve voltage and frequency stability and flexible control Effect

Inactive Publication Date: 2018-08-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0004] In order to overcome the poor adjustment accuracy of existing hybrid microgrid interconnected converters and the inability to realize mutual support of power on both sides, the present invention provides a segmented control strategy for interconnected converters, which can accurately adjust AC and DC subnets The power flow between the microgrids realizes the power balance of the system and the voltage and frequency stability of each microgrid

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  • Interconnected converter power control method in master-slave control hybrid microgrid
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Embodiment Construction

[0024] In order to illustrate the technical solution of the present invention more clearly, the following examples will be used to briefly introduce the present invention. Obviously, what are described below are only some embodiments of the present invention. On the premise of paying creative efforts, other technical solutions can also be obtained according to these embodiments, which also belong to the disclosure scope of the present invention.

[0025] See attached figure 1 , the hybrid microgrid consists of an AC subsystem, a DC subsystem, an interconnected converter system, and a detection and communication system.

[0026] The AC subsystem includes a main control unit DG_Vf, a slave control unit DG_PQ, an AC load (L_AC) and a power monitoring device; wherein, the main control unit DG_Vf adopts a constant voltage and constant frequency control method to stabilize the bus voltage on the AC side, and the slave control unit DG_PQ adopts the constant power control mode, and ...

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Abstract

The invention discloses an interconnected converter power control method in a master-slave control hybrid microgrid. The hybrid microgrid is composed of an AC subsystem, a DC subsystem, an interconnected converter system and a detection communication system. the operating states of microgrids at two sides are reflected by the capacity occupancy rates of main control units at two sides of AC and DC, a partitioning strategy is adopted to control operation of the interconnected converter, the flow of power between microgrids is adjusted, mutual support of power at two sides in an island mode andstable operation of the hybrid microgrid system are realized.

Description

technical field [0001] The invention relates to a power control method for interconnected converters in a hybrid microgrid, in particular to a power control method for interconnected converters in an off-grid mode under master-slave control. Background technique [0002] The energy crisis and environmental degradation have promoted the development and utilization of distributed micro-sources such as wind power, solar photovoltaic power generation, and micro gas turbines. In order to solve the problem of access and accommodation of distributed micro-sources, the concept of micro-grid came into being. Among them, the AC-DC hybrid microgrid including AC microgrid and DC microgrid has higher efficiency and compatibility in integrating distributed micro-sources and AC and DC loads due to the integration of the characteristics of the two microgrids; at the same time, relying on Interconnected converters can realize the mutual support of power between microgrids and improve the rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/06
CPCH02J3/06
Inventor 朱永强王福源张少谦赵娜
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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