Overload protection method and device, control method and device and wind power converter
An overload protection, overload current technology, applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, measurement devices, etc., can solve the overload protection and overload protection detection logic of power electronic devices that cannot be powered imperfections, etc.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0137] See Figure 12 , is a schematic structural diagram of a grid-side module provided by an embodiment of the present disclosure. Taking a 2.1MW double-fed wind power converter grid-side power module as an example, the grid-side power module includes a three-winding transformer 121, a main switch 122, The main contactor 123, the generator 124, the LCL filter 125, the power device under test 126 at the grid side, the power device under test 127 at the rotor side and the control device 128, the main switch 122 and the main contactor 123 are connected in series to the three The winding transformer 121 and the generator 124; the LCL filter 125, the power device under test 126 at the grid side and the power device under test 127 at the rotor side are connected in series to the three-winding transformer 121 and the generator 124; The control device 128 is connected with the grid side power device under test 126 and the rotor side power device under test 127 . The wind power conv...
Embodiment 2
[0158] Step a1: The grid-side module collects the instantaneous current value of the power device under test according to the set frequency through the collector. The current frequency is 50Hz, and the set frequency is 3000Hz.
[0159] Step a2: The effective value calculator calculates the number of sampling points in each current cycle according to the frequency of the current and the set frequency when the instantaneous value is collected, and calculates the effective value of the current. Here, 60 points are collected in each current cycle, and the square root of the sum of the squares of these 60 points is calculated to obtain the effective value of the grid-side module current.
[0160] Step a3: Determine whether the effective value of the current is greater than the upper limit of the overload current 450A, if yes, execute step a4; if not, execute a5.
[0161] Step a4: The current limiting regulator adjusts the current setting to an overload current threshold value of 4...
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