主动配电网谐波预测预警方法的研究

发布时间：2018-02-27 20:16

本文关键词： 谐波主动配电网预测预警云模型　出处：《电力系统保护与控制》2014年23期 　论文类型：期刊论文

【摘要】：提出了一种用于主动配电网谐波预测预警的方法。基于随机求和原理考虑间歇式能源投入或切出主动配电网后引起的谐波变化,对间歇式能源并网或脱网后主动配电网的谐波进行预测,作为主动配电网协调控制新能源的依据。考虑间歇式能源投入主动配电网后引起的谐波变化较大,采用云模型对谐波电流建模,利用云模型的熵来衡量正常运行方式时谐波电流的波动范围,从而确定出间歇式能源并网前后谐波电流的异常阈值。将实测数据与谐波异常阈值比较,可判断谐波电流是否异常,从而实现谐波电流预警。仿真和工程算例验证了该方法的实用性和有效性。
[Abstract]:A method for harmonic prediction and early warning of active distribution network is proposed. Based on the principle of random summation, harmonic changes caused by intermittent energy input or cutting out active distribution network are considered. The harmonics of active distribution network after intermittent energy is connected or unconnected are predicted as the basis for coordinated control of new energy in active distribution network. The harmonic changes caused by intermittent energy input into active distribution network are considered. The cloud model is used to model the harmonic current, and the entropy of the cloud model is used to measure the fluctuation range of the harmonic current in the normal operation mode. In order to determine the abnormal threshold of harmonic current before and after the intermittent energy is connected to the grid, and compare the measured data with the abnormal threshold of harmonic, we can judge whether the harmonic current is abnormal or not. Simulation and engineering examples verify the practicability and effectiveness of the method.
【作者单位】：广东电网公司电力科学研究院;广东电网公司;
【基金】：国家高技术研究发展计划(863计划)(2012AA050212)~~
【分类号】：TM73

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