1、DL/T496-2016ForewordDL/TC 17 is in charge of this English translation.In case of any doubt about the contents of English translation,the Chinese original shall be considered authoritative.This standard is drafted in accordance with the rules given in the GB/T 1.1-2009 Directives for standardization-
2、part 1:Structure and drafting of standards.This standard is a revision of DL/T 496-2001.The major changes include:-Applicable servomotor working capacity is changed from 3 000 Nm or above to 350 Nm or above;-Supplemented and adjusted types and items list of regulating test,-Revised and supplemented
3、requirements for testing conditions;-Supplemented and revised the regulating test for oil pressure supply unit;-Supplemented and revised the regulating test for common electric components;-Adjusted the electromagnetic compatibility test;-Added the guide vane and needle synchronous test;-Supplemented
4、 the frequency detecting module test;-Supplemented and adjusted the methods for calibratingctronic governor parameters;-Supplemented and adjusted the testing of fault protercu and fault tolerance functions;Supplemented and adjusted the methods for meav:ing servomotor response time constant,-Revised
5、and added the methods for measuri,ervomotor dead time;-Supplemented the methods for measuringed dead band of the electro-hydraulic governing system;-Supplemented the testing of electro-Eyraulic governing system of the impulse unit and turbine with thecontrol of pressure regulating value;-Supplemente
6、d and adjusted the control mode testing and operation condition switch testing;-Supplemented clauses concerning electro-hydraulic governing system and device testing of reversiblepump-turbine;-Supplemented and adjusted the shut-down testing under condition of tripping oil pressure and level;Suppleme
7、nted the methods for no-load disturbing testing;-Added the primary frequency control testing and isolated network regulation testing:-Supplemented the load/opening disturbing testing;-Deleted the reference for the regulating parameters selecting of the version 2001 in Annex A;-Supplemented requireme
8、nts for measuring system error and resolution.This standard replaces DL/T 496-2001 on the date of implementation.This standard is proposed by the China Electricity Council.This standard is under the jurisdiction of Electric Power Industry Standardization Technical Committee onHydropower Station Auto
9、mation(DL/TC 17-HSA).Drafting organizations:China Institute of Water Resources and Hydropower Research,Chang-JiangControl Equipment Research Institute,Science Research Institute of Shaanxi Electric Power Company,HunanElectric Power Corporation Research Institute,Harbin Electric Machine Factory Co.,Ltd,State Grid ElectricPower Research Institute.The main drafters:Zhang Jianming,Pan Xihe,Li Hua,Meng Zuohong,Piao Xiuri,Cai Weijiang
