Micro-grid frequency synchronization anti-attack coordinated control method

A frequency synchronization and cooperative control technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of control algorithm failure, algorithm vulnerable to attack, damage to the stability of the microgrid system, etc., to maintain synchronization, The effect of removing the influence

Active Publication Date: 2020-02-07
ZHEJIANG UNIV
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Problems solved by technology

However, due to the communication between DGs involved, the algorithm is easily affected by attacks, which makes the control algorithm invalid and destabilizes the microgrid system.

Method used

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  • Micro-grid frequency synchronization anti-attack coordinated control method
  • Micro-grid frequency synchronization anti-attack coordinated control method
  • Micro-grid frequency synchronization anti-attack coordinated control method

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Experimental program
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specific Embodiment

[0069] in such as figure 1 The effectiveness of the method is verified in the microgrid system shown. The microgrid contains 4 distributed power sources and three integrated loads (the sum of load demands connected to the same busbar). The installed capacity, primary control droop coefficient, and integrated load demand of distributed power are shown in Table 1 and Table 2, respectively.

[0070] Table 1

[0071]

[0072] Table 2

[0073]

[0074] Assuming that when the microgrid is running away from the main grid, the output power of the distributed power generation in the microgrid operating in an island can always meet the load demand.

[0075] The events in the whole simulation process include: when t=0s, the microgrid runs away from the main grid. Add secondary control when t=1.25s. At t=2.5s, inject a constant value attack. Before t=3.75s, the load demand in the island microgrid is only L1 and L2, and when t=3.75s, the load L3 is connected.

[0076] figure...

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Abstract

The invention discloses a micro-grid frequency synchronization anti-attack coordinated control method. The frequency of a micro grid is controlled by using a specially designed control rate, and any constant attack on a controller can be completely eliminated on the premise of ensuring system frequency synchronization. The control rate is obtained by carrying out integral operation on the basis ofa traditional distributed control method and subtracting a corresponding frequency state quantity, and the purpose of eliminating constant value attacks exerted by the controller is achieved. The convergence of the control method is strictly proved through the final value theorem. Compared with an existing constant value attack resisting method, a complex evaluation mechanism does not need to beestablished to evaluate the credibility of neighbor node information, an additional communication network is not needed to assist in attack elimination, and the influence of constant value attacks onthe system can be completely eliminated.

Description

technical field [0001] The invention relates to a frequency synchronous cooperative control method of a microgrid, in particular to a frequency synchronous anti-attack cooperative control method of a microgrid. Background technique [0002] AC microgrid cyber-physical system (CPS) is an important part of active distribution network. Due to the existence of distributed generators (DGs), frequency secondary control in microgrids often adopts a distributed cooperative control structure. However, under the deep fusion of information and electricity, the microgrid CPS is vulnerable to information attacks. Among them, the injection constant value attack (covert attack) can disrupt the normal operation of the system when the system is not easy to detect. [0003] As an effective control method for a microgrid with a large number of distributed power sources, the distributed control algorithm is vulnerable to network attacks. Due to the lack of a global observation mechanism, it c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/40
CPCH02J3/381H02J3/40
Inventor 齐冬莲陈郁林张建良
Owner ZHEJIANG UNIV
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