|
|
|
| Accurate frequency measurement based on field programmable gate array in half-period and the application |
| Zhou Peixiao1, Liu Lvna2, Yan Jieshi2, 3 |
1. Shaanxi Lueyang Hydropower Co., Ltd, Hanzhong, Shaanxi 724300;
2. Xi’an XD Automation Control System Co., Ltd, Xi’an 710043;
3. XD-GE Automation Co., Ltd, Xi’an 710018; |
|
|
|
|
Abstract Speed stabilization and frequency stabilization is the core control content of small hydropower stations. Real-time accurate frequency measurement is the premise of speed stabilization and frequency stabilization. On the basis of the current frequency measurement method, the half- period frequency measurement is realized by using the technology of field programmable gate array, which doubles the frequency measurement speed and provides conditions for fast, stable speed and frequency stabilization. The main idea is to count positive and negative half-cycles with two timers, and sum the two counters in each half-cycle to get the periodic value and cycle in turn. Secondly, in order to overcome the influence of noise bottom voltage when sine wave crosses zero point, the positive voltage bias is increased. Thirdly, high-frequency counting pulse is selected by using the high-speed multi-bit counting function of field programmable gate array to achieve high-precision frequency measurement.
|
|
Received: 21 May 2019
Published: 19 November 2019
|
|
|
|
| Cite this article: |
|
Zhou Peixiao,Liu Lvna,Yan Jieshi. Accurate frequency measurement based on field programmable gate array in half-period and the application[J]. Electrical Engineering, 2019, 20(11): 77-81.
|
|
|
|
| URL: |
|
https://dqjs.cesmedia.cn/EN/Y2019/V20/I11/77
|
[1] GB/T 50964—2014. 小型水电站运行维护技术规范[S].
[2] DL/T1650—2016. 小水电站并网运行规范[S].
[3] GB/T 50876—2013. 小型水电站安全检测与评价规范[S].
[4] 何常胜, 李郁侠, 李华, 等. 水电机组一次调频优化分析[J]. 水力发电, 2009, 35(4): 67-70.
[5] 王楠, 彭天波. 水电机组一次调频试验与分析[J]. 通信电源技术, 2017, 34(4): 205-207, 218.
[6] 郭大安, 范建军. 浅析水电机组一次调频[J]. 水电厂自动化, 2014, 35(3): 23-25.
[7] 付永庆. VHDL语言及其应用[M]. 北京: 高等教育出版社, 2005.
[8] 徐文波, 田耘. Xilinx FPGA开发实用教程[M]. 北京: 清华大学出版社, 2008.
[9] 吴天明, 谢小竹, 彭彬. Matlab电力系统设计与分析[M]. 北京: 国防工业出版社, 2004.
[10] 国家电网公司. 继电保护培训教材(上册)[M]. 北京: 中国电力出版社, 2009. |
|
|
|
2019, Vol. 20 
