Distributed control method for energy management of DC micro-grid interconnected energy storage system
A DC microgrid, distributed control technology, applied in the direction of AC network circuits, AC network load balancing, electrical components, etc., to achieve the effect of improving reliability
Pending Publication Date: 2019-08-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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In the interconnected microgrid, the energy storage system plays a vital role in energy management. Although there are many mature methods for the control of the energy storage system of a single microgrid, the control of the energy storage system in the interconnected microgrid Coordination mechanism and excavation
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[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments Some, but not all, embodiments of the invention are made. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0030] The invention proposes a distributed control method for energy management of a DC microgrid interconnected energy storage system.
[0031] Firstly, it is explained that the embodiment described in the present invention in...
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The invention discloses a distributed control method for energy management of a DC micro-grid interconnected energy storage system and belongs to the technical field of grid control. Information interaction among various energy storage systems in an interconnected DC micro-grid is established by utilizing a low-bandwidth communication network, so that energy storage units can share load power of the interconnected system according to respective residual capacity and rated capacity or absorb the surplus energy of the micro-source in a charging manner, thereby preventing the energy storage unitsfrom overcharging and over-discharging, which affects the service life, and improving reliability of the whole DC microgrid group. The method establishes a system discrete control model by discussingthe value of an adjustment factor gamma in a control strategy, and studies the influence of the residual capacity of the energy storage system on the stability of the interconnected system.
Description
technical field [0001] The invention relates to a distributed control method for energy management of a DC microgrid interconnected energy storage system, and belongs to the technical field of power grid control. Background technique [0002] Microgrid is a small-scale power generation and distribution system that integrates distributed power sources, energy storage devices, power electronic conversion devices, related loads, monitoring and protection devices. Its island operation can make more efficient use of renewable energy, and when it is connected to the grid, it can better integrate them into the large power grid. The needs of the new era promote the development of technology, and the development of technology has given birth to the emergence and maturity of new energy structures and forms. The maximum power point tracking control (MPPT) has improved the power generation efficiency of renewable energy such as photovoltaic power generation and wind power generation; t...
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IPC IPC(8): H02J3/32H02J3/38
CPCH02J3/382H02J3/32
Inventor 王愈吴雏清陈新
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS