Microgrid control method employing integrated storage and distribution design
A control method and micro-grid technology, applied in the direction of AC network load balancing, single-network parallel feed arrangement, and AC network with the same frequency from different sources, can solve the problem of immature renewable energy power generation technology, which is unfavorable for energy saving and emission reduction Problems such as the early realization of the goal and the difficulty of achieving it
Active Publication Date: 2016-04-27
樊朝晖 +3
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The technology for connecting a high proportion of renewable energy to power generation in large-scale transmission grids is still immature and difficult to achieve in the short term, which is not conducive to the early realization of national energy conservation and emission reduction goals
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[0076] The present invention will be described in further detail below with reference to the accompanying drawings and examples.
[0077] figure 1 Design the grid-connected structure and energy flow diagram of the micro distribution network for typical storage and distribution integration. by closing figure 1 When the circuit switch (S2) is turned off, the microgrid enters the network operation; otherwise, the microgrid enters the isolated network operation. When in the network operation state, if the circuit breaker (S3) at the common connection point is closed, the microgrid in network operation is then connected to the external network power supply (13) through the medium voltage AC network (12) , the microgrid enters the grid-connected operation state. Such as figure 1 As shown by the middle dotted line, multiple microgrids in the networked or grid-connected operating state can be connected end-to-end through the medium-voltage AC network (12) to form the connected mic...
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The invention discloses a microgrid control method employing an integrated storage and distribution design. With energy storage arrays distributed in various microgrids as core control objects, active or reactive automatic balance control of connected microgrid groups is achieved. The microgrid control method comprises the specific steps as follows: in networked and grid-connected states, exchange power constant values are calculated through an energy management module and are distributed to various microgrid control modules; and the microgrid control modules can independently maintain balance of intranet power in an isolated grid state and can cooperate with the energy management module, so that constant value distribution of various distributed power generation units in the networked and grid-connected states is achieved. According to the microgrid control method, mutual aid of power is achieved through a low-voltage and medium-voltage two-stage distribution network between neighboring microgrids free of support of an extranet power supply; the microgrid operation reliability is improved; the microgrids can constantly carry out electromigration among a plurality of working conditions and automatically keep the balance of generated power and electric power; the electric energy quality is improved; the safe electricity utilization requirements are met; clean power generation resources of wind, light and the like are utilized to the maximal extent; and oil and electricity are utilized to the minimal extent, so that pollution to the environment is reduced.
Description
technical field [0001] The invention belongs to the technical field of micro-distribution network, and in particular relates to a control method for a micro-distribution network with integrated storage and distribution design. Background technique [0002] Connecting distributed wind power and photovoltaic power generation units to the isolated micro-distribution network can improve the environmental protection of energy use and solve the problems of pollution and high cost caused by excessive reliance on diesel power generation. But at the same time, users are faced with the problems of intermittent power generation output and poor power quality. The above problems can be alleviated by adding an energy storage unit, but it is easy to fail to provide reliable power to users due to insufficient wind power, solar power generation or energy storage capacity, or failure of the energy storage unit. At the same time, the problem of environmental pollution cannot be completely sol...
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IPC IPC(8): H02J3/06H02J3/46H02J3/28
Inventor 樊朝晖李庄彭旭华谢东亮
Owner 樊朝晖
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