Multi-scale wind power IGBT reliability evaluation method and system considering fatigue damage
A fatigue damage and reliability technology, applied in wind power generation, general control system, control/regulation system, etc., can solve the influence of fatigue damage that cannot be effectively taken into account, the calculation efficiency cannot meet the requirements of online monitoring, and the IGBT is not effectively taken into account Fatigue damage accumulation effect and other problems, to achieve the effect of strong online monitoring ability, ensuring accuracy and reducing dependence
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0050] Such as figure 1 Shown is a schematic flow chart of a multi-time scale wind power IGBT reliability evaluation method considering fatigue damage provided by an embodiment of the present invention. figure 1 The method shown includes the following steps:
[0051] (1) Divide the reliability assessment time scale into two time scales, long-term and short-term, and use multiple time scales to comprehensively extract the life information of power devices;
[0052] Among them, step (1) is used to realize the effective consideration of different influencing factors (wind speed, ambient temperature, aging characteristics of power devices) in the reliability evaluation process.
[0053] (2) According to the topological structure of the wind power converter and the specific type of IGBT, the electrothermal coupling model of the IGBT module is established to obtain the junction temperature data, and combined with the theory of IGBT fatigue damage, the aging process of the IGBT is d...
Embodiment 2
[0081] A 2MW doubly-fed wind power generation system is taken as a specific example below, and the specific parameters are shown in Table 1. The reliability analysis of the grid-side converter IGBT is carried out by using the multi-time scale method considering fatigue damage, and the present invention is further described in detail in conjunction with the accompanying drawings.
[0082] Table 1 Parameters of wind power generation system
[0083] category parameter Rated power / MW 2 Cut-in wind speed / (m / s) 3 Rated wind speed / (m / s) 11 Cut out wind speed / (m / s) 25 Grid side voltage / V 690 Grid side frequency / Hz 50 IGBT switching frequency / Hz 3500 DC side voltage / V 1100 IGBT model Infineon-FF1400R17IP4
[0084] refer to figure 1 , the embodiment of the present invention includes the following steps:
[0085] (1) Divide the time scale of wind power converter IGBT reliability evaluation, and use multiple time sca...
Embodiment 3
[0118] An embodiment of the present invention provides a multi-time scale wind power IGBT reliability evaluation system considering fatigue damage, including:
[0119] The time scale division module is used to divide the reliability evaluation time scale, and use multiple time scales to comprehensively extract the life information of power devices;
[0120]The steady-state junction temperature database building module is used to establish the electrothermal coupling model of the IGBT module to obtain the junction temperature data for the topology of the wind power converter and the IGBT model, and combine the IGBT fatigue damage theory to establish the stability of the IGBT under different aging states. state junction temperature database;
[0121] The short-term reliability analysis module is used to output junction temperature data in real time through the electrothermal coupling model and calculate the number of real-time thermal stress cycles under the short-term time scal...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More