Method and system for evaluating dynamic energy stability of double-fed fan grid-connected system
A doubly-fed wind turbine and system dynamic technology, applied in wind power generation, measuring electricity, measuring devices, etc., can solve the problems of low accuracy of stability assessment, to ensure operation stability and safety, small amount of calculation, and adjustment process quick effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0050] Embodiment 1 of the present invention discloses a method for evaluating the dynamic energy stability of a doubly-fed fan grid-connected system, the schematic diagram is as follows figure 1 As shown, the steps are as follows:
[0051] Step S1: When sub-synchronous oscillation occurs in the double-fed wind turbine grid-connected system, collect the instantaneous values of voltage and current at the grid-connected point of the wind turbine and the series compensation point;
[0052] Preferably, in step S1, whether subsynchronous oscillation occurs in the doubly-fed wind turbine grid-connected system is detected by the following method: real-time collection of the current at the grid-connected point of the wind turbine, if the current frequency at the grid-connected point of the wind turbine is within the sub-synchronous oscillation frequency range , it is determined that subsynchronous oscillation occurs in the double-fed wind turbine grid-connected system; preferably, t...
Embodiment 2
[0092] In embodiment 2 of the present invention, as figure 2 The equivalent wind farm connected to the grid through series compensation is shown as an example. The equivalent model of double-fed wind turbine parallel connection is used to simulate the wind farm, and the simulation model is built on the Matlab / Simulink platform. The wind farm is composed of 100 identical doubly-fed wind turbines connected in parallel. After the outlets of the wind turbines are connected in parallel, they supply power to the grid through the busbar. The rated capacity of each wind turbine is 1.5MW, and they operate according to the rated output. The wind turbines adopt the generator practice. The subsynchronous oscillation of the wind turbine grid-connected system is induced by changing the grid-connected parameters of the doubly-fed wind turbine, so as to verify the dynamic energy of the wind turbine. The parameters of DFIG are shown in Table 1.
[0093] Table 1 Parameters of DFIG
[0094] ...
Embodiment 3
[0117] Embodiment 3 of the present invention discloses a dynamic energy stability evaluation system of a doubly-fed fan grid-connected system, such as Figure 12 As shown, it includes: a data acquisition module, used to collect the instantaneous values of voltage and current at the grid-connected point of the fan and the series compensation place when the sub-synchronous oscillation occurs in the doubly-fed fan grid-connected system; a dynamic energy acquisition module, used to The instantaneous value of the voltage and current at the wind turbine grid-connected point and the series compensation point output by the collection module is used to obtain the dynamic energy of the double-fed wind turbine grid-connected system; the aperiodic component extraction module is used to collect the integer-period double-fed wind turbine grid-connected system. Dynamic energy, from which the non-periodic component is extracted; the stability evaluation module is used to analyze the rate of ...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com