NB/T 31004-2011 PDF EnglishUS$125.00 · In stock · Download in 9 seconds
NB/T 31004-2011: Guidelines for vibration condition monitoring and diagnose of wind turbine generator Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsNB/T 31004-2011: Guidelines for vibration condition monitoring and diagnose of wind turbine generator---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/NBT31004-2011 NB ENERGY INDUSTRY STANDARD ICS 27.180 F 11 Record Number. 33240-2011 Guidelines for vibration condition monitoring and diagnose of wind turbine generator Issued on: AUGUST 06, 2011 Implemented on: NOVEMBER 1, 2011 Issued by. National Energy Administration Table of ContentsForeword... 3 Introduction... 4 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 5 4 Vibration condition monitoring system... 7 5 Sensor... 8 6 Technical conditions for vibration condition monitoring system... 9 7 Measurement and evaluation... 13 Appendix A... 15 Appendix B... 18 Appendix C... 20ForewordThis Standard was proposed by National Energy Administration. This Standard shall be under the jurisdiction of Wind Power Standardization Technical Committee. Drafting organizations of this Standard. Zhong Neng Power-tech Development Co., Ltd. Main drafters of this Standard. Shen Zhu, Zhou Jicheng, Zhang Baoquan, Sheng Yingxin, Xia Hui, Yue Junhong and Meng Kaifeng. During implementation of this Standard, any comments or suggestions shall be feed- backed to China Electricity Council Standardized Management Center (No.1, 2nd lane, Baiguang Road, Beijing, 100761).IntroductionVibration condition monitoring of wind turbine generator (hereinafter referred to as “wind turbine”) refers to monitoring the variation of wind turbine’s vibration condition, assessing the condition of wind turbine, detecting and tracking equipment failure in early stage by selecting different monitoring position according to the type of wind turbine that shall be monitored. This Standard is used to provide corresponding provisions and guidance for manufacturer, installer, user, certification organization as well as relative technical staff of wind turbine’s vibration condition monitoring. Guidelines for vibration condition monitoring and diagnose of wind turbine generator1 ScopeThis Standard specifies the system type of wind turbine’s vibration condition monitoring, sensor installation principle, measurement type and measured value, technical conditions of vibration condition monitoring system, evaluation of vibration value as well as signal treatment and analysis method. This Standard is applicable to the horizontal axis wind turbine of which the unit capacity is greater than or equals to 1.5 MW. Other wind turbines may reference to this Standard according to their own features.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 19873.1-2005 Condition monitoring and diagnostics of machines - Vibration condition monitoring - Part 1.General procedures GB/T 19873.2-2009 Condition monitoring and diagnostics of machines - Vibration condition monitoring - Part 2.Processing analysis and presentation of vibration data IEC 61850-2002 Communication networks and systems in substations3 Terms and definitionsThe following terms and definitions apply to this Standard. 3.1 Breakdown maintenance Maintenance after wind turbine failure. 3.2 Condition-based maintenance Maintenance determined according to wind turbine condition. 3.3 Condition monitoring Detected and gathered information and data that reflect wind turbine condition. 3.4 Diagnostics Symptom and syndrome inspections for determination of nature (type, condition, degree) of the fault or failure. 3.5 Failure The ability of failing to perform certain specified function. 3.6 Fault The condition of parts when a part or a module of wind turbine degrades, or anomalous condition occurs, which may cause wind turbine failure. 3.7 Alarm The operating signal or message designed for informing staff when selected parameter or its logical combination is abnormal. 3.8 Alert The operating signal or message designed for informing staff when selected parameter or its logical combination is abnormal and requires more attention. 3.9 Sign Characteristic parameters of signal that indicate the condition of relative information. 3.10 Vibration signal Measurement of all frequency components that are contained in a system vibration. 3.11 Frequency domain Physical quantity that takes frequency as measurement. 3.12 Time domain Physical quantity that takes time as measurement. 3.13 Cross-channel analysis Using two or more analyzers of input channel to realize functions such as phase, relevance and transfer function calculation. 3.14 Baseline Single or a group of descriptors that provides baseline for wind turbine’s normal condition in various processes. 3.15 Waterfall Three-dimensional multi-spectral display of relative time or speed.4 Vibration condition monitoring system4.1 Types of vibration condition monitoring system Vibration condition monitoring system is divided into fixed installation system, semi- fixed installation system and portable system. 4.1.1 Fixed installation system System sensor and data collection device adopt fixed installation. Data collection shall be continuous or periodic. Fixed installation system usually is used for wind turbine with complex monitoring tasks. 4.1.2 Semi-fixed installation system System sensor adopts fixed installation. Data collection device adopts non-fixed installation; connect only during data collection. Data collection is periodic. 4.1.3 Portable system System sensor and data collection device all adopt non-fixed installation. Data shall be collected by portable data collector. Data collection is periodic. 4.1.4 System selection principle a) Offshore wind turbine shall adopt fixed installation system; b) Onshore wind turbine of over 2 MW (including 2 MW) shall adopt fixed installation system; c) Onshore wind turbine of under 2 MW can choose semi-fixed installation or portable system; d) When the warranty expires, during the acceptance of wind turbine, it shall present the vibration condition report that is provided by wind turbine vibration condition monitoring system. 4.2 Procedure of condition monitoring The procedure of wind turbine vibration condition monitoring includes pre-test of vibration, vibration monitoring technology, vibration baseline test, vibration routine test, etc. 3) Harmonic content. not less than 5%. f) Voltage caused by ground potential rise that monitoring system shall be able to withstand. not less than 2000 V. 6.2 Extreme ambient temperature for storage and transport Permissible extreme ambient temperature for device’s storage and transport is -45°C ~ +85°C. 6.3 Detection unit 6.3.1 Overview Detection unit is in wind turbine’s cabin to realize the measured parameter’s collection, signal conditioning, modulus conversion and data pre-processing. 6.3.2 Uncertainty The uncertainty of sensor measurement shall be within ±1%. The uncertainty of detection unit shall be within ±2%. 6.3.3 Frequency range Sensor’s linear frequency range shall cover from 0.2 times the minimum rotation frequency to 3.5 times concerned highest signal frequency (usually it shall not exceed 40 kHz). a) Frequency range of accelerometer sensor. 0.1Hz ~ 30kHz; b) Frequency range of speed sensor. 1Hz ~ 2kHz; c) Frequency range of displacement sensor. 0Hz ~ 10kHz. 6.3.4 Insulating properties Under normal test atmospheric conditions (ambient temperature. +15°C ~ +35°C; relative humidity. 30%~60%; atmospheric pressure. 86kPa~106kPa), detect unit’s energized parts such as BETWEEN power, signal and data input loop-circuit AND non- conductive metal and shell, BETWEEN unconnected electrical circuits; the insulation shall meet requirements in 6.3.4.1 ~ 6.3.4.3. 6.3.4.1 Insulation resistance Under normal test atmospheric conditions, each circuit insulation resistance of different rated voltages shall be less than the stipulated values in Table 2. Table 2 Requirements for insulation resistance of each loop-circuit test Rated working voltage Insulation resistance requirements (measuring c) Electrical fast transient burst immunity. test grade/voltage is grade 4, ±4 kV; d) Surge (impact) immunity. test grade/voltage is grade 4, ±4 kV; e) Conducted disturbance immunity induced by RF field. test grade/voltage is grade 3, 10 V; f) Power-frequency magnetic field immunity. test grade/magnetic field intensity is grade 5, 100 A/m; g) Pulse magnetic field immunity. test grade/magnetic field intensity is grade 5, 100 A/m; h) Damped oscillatory magnetic field immunity. test grade/magnetic field intensity is grade 5, 100 A/m; i) Voltage dip and short interruption immunity. voltage dip and short i... ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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