智能微电网分布式电压控制的研究
发布时间：2018-08-03 08:30
【摘要】：随着分布式发电技术的大力发展和微网技术的日益成熟，越来越多的分布式电源通过微网技术接入低压配电网形成智能微电网，，随之会带来如电压波动等电压问题。考虑在大电网有功输出比较充裕的情况下，系统对于分布式电源有功功率的输出要求不是十分迫切。因此，可以通过对分布式电源有功和无功的合理调节来降低电压波动和减小电压偏差。本文提出了一种基于分布式电源有功和无功综合控制的智能微电网电压控制方法，主要研究工作如下： 本文首先研究了一种基于图论的分布式算法，并将其应用于智能微电网。通过构建一种简单形式的分布式控制算法，并进行仿真分析，验证了该算法能够实现对节点功率的分布式协调控制，并具有保持各节点功率总和不变的特性。 其次，基于低压智能微电网中电压波动主要与有功功率有关这一结论，提出了一种基于有功功率的分布式电压控制算法。当系统发生电压波动时，通过对算法中参数化状态转移矩阵的修改和更新，协调控制分布式电源的有功出力，从而实现电压控制，同时该算法可以满足分布式电源的有功出力限制。通过对一个380V智能微电网进行仿真，验证了该算法可以有效降低电压波动，提高电能质量，对智能微电网的稳定运行起到积极作用。 最后，考虑分布式电源具有一定的无功调节能力，提出了有功和无功综合作用的分布式电压控制算法。通过对基于有功功率的分布式电压控制算法进行相应地改进，并对分布式电源的有功和无功出力进行综合协调控制，使之共同实现电压控制。仿真结果表明，加入无功功率的调节后，有助于增大电压调节范围和进一步提高电能质量。
[Abstract]:With the development of distributed generation technology and the maturity of microgrid technology, more and more distributed power sources are connected to the low-voltage distribution network to form a smart microgrid, which will bring voltage problems such as voltage fluctuation. Considering that the active power output of large power grid is abundant, it is not very urgent for the system to output active power of distributed generation. Therefore, the voltage fluctuation and voltage deviation can be reduced by adjusting the active and reactive power reasonably. In this paper, a voltage control method for smart microgrid based on active and reactive power integrated control of distributed power generation is proposed. The main research work is as follows: firstly, a distributed algorithm based on graph theory is studied in this paper. And it is applied to smart microgrid. By constructing a simple distributed control algorithm and simulation analysis, it is verified that the algorithm can realize distributed coordinated control of node power, and has the property of keeping the sum of power of each node unchanged. Secondly, based on the conclusion that voltage fluctuation is mainly related to active power in low-voltage smart microgrid, a distributed voltage control algorithm based on active power is proposed. When the voltage fluctuation occurs in the system, by modifying and updating the parameterized state transfer matrix in the algorithm, the active power output of the distributed power supply is coordinated and the voltage control is realized. At the same time, the algorithm can satisfy the active power limit of distributed power generation. Through the simulation of a 380V smart microgrid, it is verified that the algorithm can effectively reduce the voltage fluctuation, improve the power quality, and play a positive role in the stable operation of the smart microgrid. Finally, considering the reactive power regulation ability of distributed power supply, a distributed voltage control algorithm is proposed, which combines active and reactive power. The distributed voltage control algorithm based on active power is improved accordingly, and the active and reactive power output of distributed power supply is controlled in a comprehensive and coordinated manner, so that the voltage control can be realized together. The simulation results show that the addition of reactive power regulation can increase the range of voltage regulation and further improve the power quality.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761
本文编号：2161183
[Abstract]:With the development of distributed generation technology and the maturity of microgrid technology, more and more distributed power sources are connected to the low-voltage distribution network to form a smart microgrid, which will bring voltage problems such as voltage fluctuation. Considering that the active power output of large power grid is abundant, it is not very urgent for the system to output active power of distributed generation. Therefore, the voltage fluctuation and voltage deviation can be reduced by adjusting the active and reactive power reasonably. In this paper, a voltage control method for smart microgrid based on active and reactive power integrated control of distributed power generation is proposed. The main research work is as follows: firstly, a distributed algorithm based on graph theory is studied in this paper. And it is applied to smart microgrid. By constructing a simple distributed control algorithm and simulation analysis, it is verified that the algorithm can realize distributed coordinated control of node power, and has the property of keeping the sum of power of each node unchanged. Secondly, based on the conclusion that voltage fluctuation is mainly related to active power in low-voltage smart microgrid, a distributed voltage control algorithm based on active power is proposed. When the voltage fluctuation occurs in the system, by modifying and updating the parameterized state transfer matrix in the algorithm, the active power output of the distributed power supply is coordinated and the voltage control is realized. At the same time, the algorithm can satisfy the active power limit of distributed power generation. Through the simulation of a 380V smart microgrid, it is verified that the algorithm can effectively reduce the voltage fluctuation, improve the power quality, and play a positive role in the stable operation of the smart microgrid. Finally, considering the reactive power regulation ability of distributed power supply, a distributed voltage control algorithm is proposed, which combines active and reactive power. The distributed voltage control algorithm based on active power is improved accordingly, and the active and reactive power output of distributed power supply is controlled in a comprehensive and coordinated manner, so that the voltage control can be realized together. The simulation results show that the addition of reactive power regulation can increase the range of voltage regulation and further improve the power quality.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761
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本文编号：2161183
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