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作 者:苏灿 周文 胡雪凯 闫鹏 孟良 刘军成 SU Can;ZHOU Wen;HU Xuekai;YAN Peng;MENG Liang;LIU Juncheng(State Grid Hebei Electric Power Research Institute,Shijiazhuang 050000,China;Xi’an Boyu Electrical Co.,Ltd.,Xi’an 710065,China)
机构地区:[1]国网河北省电力有限公司电力科学研究院,石家庄050000 [2]西安博宇电气有限公司,西安710065
出 处:《高压电器》2024年第10期198-205,共8页High Voltage Apparatus
基 金:国网河北能源技术服务有限公司科技项目(面向雄安新区低压直流配电网电能质量测试技术研究及装置研制)。
摘 要:与交流配电系统一样,表征直流配电系统特征指标的直流电压、直流电流也在时刻变化着且其变化幅度、变化频度均具有很强的随机性,导致接入电网的照明类负载灯光照度的随机变化,引起感受体—人对照度变化的视感即常说的闪变。相比于交流配电系统已有公认的、标准化的闪变测量方法,直流配电系统的闪变测量方法目前还处于研究探讨之中。文中基于直流配电系统的特点,在分析传统交流配电系统平方解调闪变测量方法的基础上提出了一种适用于直流配电系统的去平方解调闪变测量方法;仿真分析表明:该方法准确度高,在较宽的闪变变化范围内误差在可接受的范围内,大大优于传统的基于平方解调的闪变测量方法。As same as AC distribution system,the DC voltage and DC current characterizing feature of DC distribu⁃tion system is changing instantaneously in random in terms of fluctuation magnitude and frequency,making variation of illuminance of lights connected to DC network,leading to human being impression of unsteadiness of visual sensa⁃tion induced by a light stimulus,namely flicker.Comparing with the recognized and standardized flicker measure⁃ment method of AC distribution system,the flicker measurement method for DC distribution system is still under de⁃velopment and discussion.In this paper,a new method called non⁃squaring⁃demodulation method applicable for DC distribution system is proposed on the basis of the feature of DC distribution system and the traditional squaring⁃de⁃modulation flicker measurement method defined in AC distribution system.The simulation analysis shows that the method is high in accuracy,the error within the wide flicker variation range is within the acceptable range,which is greatly superior to traditional square demodulation method.
分 类 号:TM721.1[电气工程—电力系统及自动化]
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