微网分布式电源非线性功率控制策略

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摘要微网中多种分布式电源需要借助电力电子接口与大电网互联, 其自身稳定性以及对大电网的安全稳定性问题都尤为重要, 传统的控制方法存在诸多弊端, 本文提出了一种基于精确线性化的非线性控制方法, 通过一种特定的非线性变换, 将非线性控制问题的求解转化成线性最优控制的求解, 通过反变换得到最终非线性系统控制规律的解析解, 并验证该控制策略的鲁棒性。本文利用该方法对微网中的分布式电源的功率输出进行了有效控制, 与传统的PQ控制进行了对比分析, 最后在基于PSCAD/EMTDC软件平台上验证了非线性控制的控制效果的优越性。

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	何越
	李正天
	林湘宁

关键词 ：非线性控制, 精确线性化, 功率控制, 鲁棒控制

Abstract：Electronic-Interface (EI) is used in the micro-grid to connect the distributed generator (DG) with the bulk grid, and the stability of itself and its effect on the grid is of great importance. Traditional control methods have some different disadvantages. This paper presents a nonlinear control method based on the accurate linearization. This method transfers the nonlinear problem to a normal linear one use specific nonlinear transformation, resulting in the final control of the whole nonlinear system. This paper tests the robust control characteristic of this method. This paper controls the power output of the DG, compared with the conventional PQ control method. The experiment results of the simulation on the PSCAD/EMTDC show the correctness and advantage of the nonlinear control method.

Key words： Nonlinear control accurate linearization power control robust control

收稿日期: 2010-11-02 出版日期: 2014-03-19

PACS:

TM464

基金资助:国家自然科学基金(50837002、50777024), 国家高技术研究发展计划(863计划)(2008AA05Z214), 国家重点基础研究发展计划(973计划)(2009CB219700), 教育部新世纪人才项目(NCET-07- 0325), 国家电网公司项目(SGKJJSKF(2008)与2009年项目)和中央高校基本科研业务费专项资金资助。

作者简介: 何越男, 1987年生, 硕士研究生, 主要从事电力系统分析及保护控制研究。李正天男, 1980年生, 博士研究生, 主要从事电力系统继电保护和控制研究。

引用本文:

何越, 李正天, 林湘宁. 微网分布式电源非线性功率控制策略[J]. 电工技术学报, 2012, 27(1): 48-55. He Yue, Li Zhengtian, Lin Xiangning. Study of Nonlinear Control of Power Output of DG in the Micro-Grid. Transactions of China Electrotechnical Society, 2012, 27(1): 48-55.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2012/V27/I1/48

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