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Fully distributed self-optimizing control method based on power control for island microgrid

A fully distributed, control method technology, applied in the direction of AC network circuit, single network parallel feeding arrangement, electrical components, etc., can solve the problems of high control algorithm, difficulty in realizing coordinated control of generators, high complexity of communication network design, etc. Achieve good steady state and dynamic performance

Active Publication Date: 2016-08-17
ZHEJIANG UNIV
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Problems solved by technology

However, distributed control has high requirements on the control algorithm, and the design complexity of the communication network is high, so it is difficult to realize the coordinated control between the generators

Method used

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  • Fully distributed self-optimizing control method based on power control for island microgrid
  • Fully distributed self-optimizing control method based on power control for island microgrid
  • Fully distributed self-optimizing control method based on power control for island microgrid

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specific Embodiment

[0054] In Matlab / Simulink, the AC microgrid of a typical isolated island operation is set up, including three distributed generators and two synchronous generators with a capacity of 1MW; the three distributed generators adopt the control method proposed by the present invention to synchronize The role of the generator is to provide frequency support for distributed generators, such as figure 2 shown. The microgrid system parameters are as follows:

[0055] S i =1MW,T 2 =2s,T 3 =0.1s,α=20,β=1 / 3,f min =49Hz,f max =51Hz

[0056] image 3 The cost micro-increase rate function curves of three distributed generators are given, Figure 4 The inverted sag curve adopted by the distributed cubic control method is given. The initial total load of the microgrid system is 2.5MW, and the embodiment considers two situations:

[0057] The load is put into operation at 30s to increase the total system load to 3.0MW; the load is put into operation at 45s to increase the total system...

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Abstract

The invention discloses a fully distributed self-optimization control method based on constant power control of an isolated island microgrid. Through the distributed secondary control method, the voltage frequency at the outlet side of the distributed generator without the secondary component is obtained; through the distributed primary control method, the primary component of the active power reference value is obtained; through the distributed tertiary control method, the active power is obtained The third component of the reference value; calculate the active power reference value of the distributed generator, and perform fully distributed self-optimizing constant power control on the microgrid. The present invention is based on the control idea of ​​adding layered control, without resorting to the central controller of the micro-grid and the communication system, the micro-grid can not only have the economic scheduling function based on the equal micro-increase rate criterion in the three-time control, but also not Lose the good dynamic characteristics of the linear droop control method in the primary control, and take into account the secondary control function; make the distributed generator directly participate in the economic dispatch of the microgrid operating in the island, so that the microgrid is in an economically optimal operation mode.

Description

technical field [0001] The invention relates to a control method for micro-grid isolated operation, in particular to a fully distributed self-optimization control method based on power control for an isolated island micro-grid. Background technique [0002] At present, with the continuous expansion of the grid scale, the disadvantages of the traditional power system are becoming more and more prominent. At the same time, the increasing consumption of traditional fossil fuels has also brought enormous pressure to the environment. In order to solve the above problems, distributed generation has begun to receive widespread attention in recent years. Distributed power generation refers to the power generation facilities arranged directly on the distribution network or distributed near the load, which can generate electricity economically, efficiently and reliably. Distributed power generation is flexible and decentralized, and can be used as a backup with the large power grid. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46
CPCH02J3/388H02J3/46
Inventor 辛焕海赵睿章雷其乐程毅何小良杨欢汪震
Owner ZHEJIANG UNIV