电力系统自动化
電力繫統自動化
전력계통자동화
Automation of Electric Power Systems
2015年
18期
86-90
,共5页
卜强生%袁宇波%高磊%张道农%宋亮亮
蔔彊生%袁宇波%高磊%張道農%宋亮亮
복강생%원우파%고뢰%장도농%송량량
数字采样%非整周期延时%整周期延时%群延时%工频稳态法%变频法
數字採樣%非整週期延時%整週期延時%群延時%工頻穩態法%變頻法
수자채양%비정주기연시%정주기연시%군연시%공빈은태법%변빈법
digital sampling%non-integral period delay%integral period delay%group delay%steady power frequency method%frequency changing method
采样延时是智能变电站数字化采样环节的重要指标。文中从数字化采样环节构成出发，分析了采样延时的特性及对二次系统的影响，针对普遍采用的工频稳态测量方法存在的问题，提出了基于变频原理的延时测量方法，能够准确测量出数字化采样环节的非整周期延时和整周期延时。通过模拟仿真和实际设备测试验证了延时变频测量法的正确性，最后给出了工程应用中变频法测量采样延时的具体实施方法。
採樣延時是智能變電站數字化採樣環節的重要指標。文中從數字化採樣環節構成齣髮，分析瞭採樣延時的特性及對二次繫統的影響，針對普遍採用的工頻穩態測量方法存在的問題，提齣瞭基于變頻原理的延時測量方法，能夠準確測量齣數字化採樣環節的非整週期延時和整週期延時。通過模擬倣真和實際設備測試驗證瞭延時變頻測量法的正確性，最後給齣瞭工程應用中變頻法測量採樣延時的具體實施方法。
채양연시시지능변전참수자화채양배절적중요지표。문중종수자화채양배절구성출발，분석료채양연시적특성급대이차계통적영향，침대보편채용적공빈은태측량방법존재적문제，제출료기우변빈원리적연시측량방법，능구준학측량출수자화채양배절적비정주기연시화정주기연시。통과모의방진화실제설비측시험증료연시변빈측량법적정학성，최후급출료공정응용중변빈법측량채양연시적구체실시방법。
Sampling delay is an important index of digital sampling.Proceeding from the composition of each link of digital sampling,the characteristics of sampling delay and the influence on the secondary system are analyzed in detail.In view of the problems with the widely adopted steady power frequency testing method,frequency changing principle-based method of delay testing is put forward.This method can accurately measure the non-integral period and integral period delay of digital sampling.The correctness of the frequency changing method is verified by simulation and actual testing.Finally the specific implementation of delay testing by the frequency changing method is proposed for project application.
