Brief Description of Relationship between Operation Evaluation and Diagnostic System of Wind Power Generator Set and Vibration Monitoring System
Vibration monitoring system will be an important component of operation evaluation and diagnostic system of wind power generator set! Monitoring objects of vibration monitoring system mainly focus on the transmission part of wind power generator set (mechanical failures), such as the generator, gear box and main bearings of 750 generator set, and Megawatt machine mainly focuses on the generator and bearings but has relatively weak judgment to the failures in the other part of the wind power generator set.
At present, most wind power generator sets nationwide have achieved the remote monitoring through scada system, including the wind power with the longest monitoring period for 5 to 6 years. Scada system has stored a large number of on-site operation data of wind power generators and the operation of scada system is in good condition.
The most direct sources for the developing the standards of wind turbine generator set include: 1) historical data of wind turbine generator set; 2) operation and maintenance experience; 3) design parameters of generator set, etc. Therefore, development of standards should include the operation service, testing, generator set design and software development departments.
Operation evaluation and diagnostic system of wind turbine generator set is the system to use a variety of operation data (historical data, real-time data and status data) of wind turbine generator set and refer to the operation evaluation standards of wind turbine generator set to conduct the qualitative and quantitative analysis as well as make accurate judgment and evaluation to the operation status of wind turbine generator set and the failures that may emerge, through which allows us to have much clearer understandin
During the long-term operation process of the wind turbine generator set, the operation data demonstrated by the same type of generator set under different environmental conditions has very strong regularity, if we summarize the regular and empirical things of the generator set and combine the design operation parameters of the generator set as the fixed standards, it can be taken as the important basis for use to determine the operation status of the operator set, help use to further and comprehensively understand the operation conditions of the generat
At present, basic operation mode of wind power farm maintenance by wind power industry is patrol inspection + routine inspection + maintenance after wind power turbine generator failure. This operation mode has the following problems:
According to NPFA 70 of National Electrical Code(R), NEC, WTTC means the cable which can be installed in cable tray or wire way of wind driven generator. In the authentication system of UL, WTTC is involved under ZGZN product type, the evaluation base requirement is Subject 2277- Outline of Investigation for Flexible Motor Supply Cable and Wind Turbine Tray Cable:
In general, the wire and cable used in the wind driven generator system can be divided into four classes, including:
★Wind turbine tray cable (WTTC for short)
★Thermoplastic-insulated wire and cable, such as linetype THHN and THWN; and thermoset-insulated wire and cable, such as voltage class 2000V linetype RHW-2 with additional mark used on cable tray or marked FT4 class;
★ Power-limited circuit cable, such as linetype CMG, CM, CL2, CL3 and PLTC applicable for cable tray;
The global wind power generation market is rapidly developing.According to annual industry forecast of Global Wind Energy Council (GWEC), the global wind power generation energy in the future five years will increase by 160% extent; America and Mainland China will be the fastest extension areas of global wind power generation and have unexpected growth in recent years.According to the report from Wind Energy Association (AWEA), the wind power generation energy from newly installed equipment n American wind power energy industry of 2009 exceeded 10,000 MW
Now for some more myths, as promised in part one of this series. There are many myths going around about wind turbines, especially VAWTs. Unfortunately for vertical axis wind turbine enthusiasts, almost every wind turbine investment scam (ranging from small scale to utility scale) in the last 50 years involved vertical axis wind turbines. The reason for this abundance of scams is simply that vertical axis wind turbines (VAWTs) look new and different, and are intriguing to the public.