| 引用本文: | 梅军,郑建勇,丁祖军,张胄,饶莹.转换开关的优化数字滤波器设计[J].电力自动化设备,2008,(1):101-104 |
| .Design of optimal digital filter for transfer switch[J].Electric Power Automation Equipment,2008,(1):101-104 |
|
|
| 摘要: |
| 针对转换开关电压检测法——dq变换设计了优化滤波器,该滤波器是利用低阶陷波滤波器和较高截止频率低阶低通滤波器串联形成的,通过理论推导给出了该滤波器的传递函数,在相同的滤波阶数下,该优化数字滤波器在提取基波正序幅值的性能比较中,优于平均值滤波法及低通数字滤波器法等。对该滤波器应用于电压检测中的响应时间进行了综合评估,包括单相电压下降、两相电压同时下降和三相电压同时下降等多种情况。仿真结果表明,该滤波器既具有较好的检测精度,又具有令人满意的动态响应性能。 |
| 关键词: 转换开关,滤波器,电压检测,电能质量,电压跌落 |
| DOI： |
| 分类号:TN731.7 |
| 基金项目:江苏省高技术研究发展计划项目 |
|
| Design of optimal digital filter for transfer switch |
|
MEI Jun ZHENG Jianyong DING Zujun ZHANG Zhou RAO Ying
|
| Abstract: |
| An optimal filter is designed specially for dq transform used in the voltage mea-surement of transfer switch,which is composed of lower-order notch filter and lower-order low pass filter with higher cut-off frequency in series.Its transfer function is presented by theoretical derivation.If the order is same,it is better in measuring the positive sequence of fundamental amplitude than the average filter and the low-pass filter.Its integrated response time of voltage measurement is evaluation,including single-,double-and triple-phase voltage sags.Simulation result shows that the designed filter has better measurement accuracy and quicker dynamic response. |
| Key words: transfer switch,filter,voltage measuring,electric power quality,voltage sag |
