Monitoring system based on electric information for health status of wind driven generator and monitoring method thereof

Abstract

The invention discloses a monitoring system based on electric information for the health status of a wind driven generator and a monitoring method thereof. The monitoring system comprises a wind driven generator data acquisition module, a signal preprocessing module, a signal processing module and a monitoring output module. The monitoring method disclosed by the invention comprises the followingsteps: (1) acquiring wind driven generator environmental data, running status physical quantity and output electric information from the wind driven generator; (2) processing the wind driven generator environmental data and the running status physical quantity acquired by the wind driven generator data acquisition module, estimating to obtain the due output power of the wind driven generator, comparing the due output power with actual output power, and if the deviation is overgreat, outputting an alarm signal; and (3) processing a wind driven generator output current signal acquired by the wind driven generator data acquisition module. By adopting the monitoring system based on the electric information for the health status of the wind driven generator and the monitoring method thereof, the health status of the wind driven generator can be efficiently and economically monitored, mechanical failure and electrical failure can be monitored simultaneously, and a sufficient and reliable safety guarantee is provided for the wind driven generator.

Description

technical field

[0001] The invention relates to a wind power generator health state monitoring system for monitoring the wind power generator health state. The system can efficiently monitor the health state of the wind power generator set. The present invention also relates to a monitoring method using the above wind power generator health status monitoring system. Background technique

[0002] my country's wind power generation is developing rapidly, but it faces the challenge of frequent failures in the initial stage. The survey report shows that the average annual power generation time of hundreds of wind turbines in a certain 7 wind farms is about 20% different from the specified time, and the resulting economic loss of power generation has reached 170 million yuan, and the reason is downtime. If the maintenance cost is calculated, the economic loss will increase exponentially.

[0003] The wind power industry expects to transform from extensive management to intensiv...

Examples

Embodiment 1

[0079] One 10kW wind turbine, the simulated wind speed is 10 m / s, and the deviation threshold between the expected power generation and the actual power generation is set at 10%. A mechanical disturbance or fault is simulated by attaching a certain mass object to the rotor, specifically: normal operation at 0-60 seconds, starting at 61 seconds, adding a 1kg addition to its 290.7kg rotor (about 0.3%, causing The balance quality grade is G7.8, which is less than the low-speed fan drive shaft balance grade G16 specified in ISO1940-1:2003) for 60 seconds. Collect system electrical information according to step 1) of the above method. 2) After preprocessing, the deviation between the expected power generation and the actual power generation is 5.1% image 3 shown. The ordinate represents the spectral energy of the signal after mechanical perturbation. Depend on image 3 It can be clearly seen that the mechanical disturbance can be easily detected.

Embodiment 2

[0081] One 30kW wind turbine, the simulated wind speed is 10 m / s, and the deviation threshold between the expected power generation and the actual power generation is set at 10%. Simulate electrical disturbances or faults by changing its phase-to-phase resistance, specifically: run normally at 0-60 seconds; change a certain phase-to-phase resistance by 4% at 60-120 seconds; run normally at 120-180 seconds; 180-240 seconds, change the resistance of a certain phase by 9%; run normally in 240-300 seconds. According to the method step 1) of the present invention, electrical information of the system is collected. 2) After preprocessing, the deviation between the expected generated power and the actual generated power is 4.3% Figure 4 , 5 shown. Figure 4 The ordinate represents the disturbance-related frequency after the electrical disturbance, Figure 5 The ordinate represents the spectral energy of the signal after electrical perturbation. Depend on Figure 4 , 5 It can be...

technical field

[0001] The invention relates to a wind power generator health state monitoring system for monitoring the wind power generator health state. The system can efficiently monitor the health state of the wind power generator set. The present invention also relates to a monitoring method using the above wind power generator health status monitoring system. Background technique

[0002] my country's wind power generation is developing rapidly, but it faces the challenge of frequent failures in the initial stage. The survey report shows that the average annual power generation time of hundreds of wind turbines in a certain 7 wind farms is about 20% different from the specified time, and the resulting economic loss of power generation has reached 170 million yuan, and the reason is downtime. If the maintenance cost is calculated, the economic loss will increase exponentially.

[0003] The wind power industry expects to transform from extensive management to intensiv...

Examples

Embodiment 1

[0079] One 10kW wind turbine, the simulated wind speed is 10 m / s, and the deviation threshold between the expected power generation and the actual power generation is set at 10%. A mechanical disturbance or fault is simulated by attaching a certain mass object to the rotor, specifically: normal operation at 0-60 seconds, starting at 61 seconds, adding a 1kg addition to its 290.7kg rotor (about 0.3%, causing The balance quality grade is G7.8, which is less than the low-speed fan drive shaft balance grade G16 specified in ISO1940-1:2003) for 60 seconds. Collect system electrical information according to step 1) of the above method. 2) After preprocessing, the deviation between the expected power generation and the actual power generation is 5.1% image 3 shown. The ordinate represents the spectral energy of the signal after mechanical perturbation. Depend on image 3 It can be clearly seen that the mechanical disturbance can be easily detected.

Embodiment 2

[0081] One 30kW wind turbine, the simulated wind speed is 10 m / s, and the deviation threshold between the expected power generation and the actual power generation is set at 10%. Simulate electrical disturbances or faults by changing its phase-to-phase resistance, specifically: run normally at 0-60 seconds; change a certain phase-to-phase resistance by 4% at 60-120 seconds; run normally at 120-180 seconds; 180-240 seconds, change the resistance of a certain phase by 9%; run normally in 240-300 seconds. According to the method step 1) of the present invention, electrical information of the system is collected. 2) After preprocessing, the deviation between the expected generated power and the actual generated power is 4.3% Figure 4 , 5 shown. Figure 4 The ordinate represents the disturbance-related frequency after the electrical disturbance, Figure 5 The ordinate represents the spectral energy of the signal after electrical perturbation. Depend on Figure 4 , 5 It can be...

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