Coordinated control method of PMSG (Permanent Magnet Synchronous Generator) fan for providing primary frequency modulation and virtual inertia
A technology of virtual inertia and coordinated control, applied to wind power generation, AC network circuits, electrical components, etc., to achieve the effect of continuous power support and slowing down the rate of frequency change
Inactive Publication Date: 2019-07-12
SICHUAN UNIV
View PDF3 Cites 13 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Both the electrostatic energy in the DC capacitor of the PMSG fan and the rotational kinetic energy in the rotor can provide frequency modulation services for the AC system. However, there are relatively few studies on the coordination of the two in the existing technology. Therefore, the research uses the electrostatic energy and the rotational kinetic energy in the DC capacitor of the PMSG fan. The rotational kinetic energy in the rotor is of great significance to provide coordinated control of primary frequency modulation and virtual inertia
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0034] Such as figure 1 As shown, the simulation model adopted is a system in which PMSG wind turbines are connected to weak AC power grids. PMSG wind turbines are connected to the power grid through back-to-back converters, and the rotor side converter (rotor side converter, RSC) controls the active power and reactive power output by the wind turbines. , the grid side converter (grid side converter, GSC) controls the DC voltage and the amplitude of the AC voltage.
[0035] 1. DC inertial control
[0036] The DC control method mainly uses the energy stored in the DC capacitor to provide virtual inertia for the AC system. For the AC system, the AC frequency can reflect the power balance relationship between the generator output and the load, and the typical synchronous generator rotor motion equation is
[0037]
[0038] In the f...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a coordinated control method of a PMSG (Permanent Magnet Synchronous Generator) fan for providing primary frequency modulation and virtual inertia. By establishing a coupling relationship between DC voltage and AC frequency and adding DC inertia control, electrostatic energy stored in a DC capacitor is enabled to provide virtual inertia; virtual capacitor control is added in order to solve the problems of increase in project cost and increase in converter station volume, thereby being capable of providing a virtual capacitor which is much greater than the actual capacitor in a back-to-back converter, and providing more virtual inertia support for the AC system; active power-frequency droop control is added in RSC constant power control, thereby enabling the PMSG fanto provide the primary frequency modulation service and continuous active power support. By adopting the method of the invention, the PMSG fan can provide primary frequency modulation and virtual inertia support by simultaneously utilizing electrostatic energy in the DC capacitor and rotating kinetic energy in a rotor.
Description
technical field [0001] The invention relates to the fields of power system stability and control and new energy grid connection, in particular to a coordinated control method for primary frequency modulation and virtual inertia provided by a PMSG wind turbine. Background technique [0002] In recent years, due to problems such as energy crisis, climate change and environmental pollution, wind energy has developed rapidly as a clean energy source, and its penetration rate in the power system has continued to increase. Unlike synchronous generators, permanent magnet synchronous generator (PMSG) wind turbines are connected to the grid through power electronic converters, and in order to capture the maximum wind energy, the output power of wind turbines is usually tracked by maximum power point tracking , MPPT) control, which leads to a decoupling state between the fan speed and the grid frequency, and the rotational inertia of the fan rotor is hidden. With the increasing propo...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/24
CPCH02J3/24H02J3/386Y02E10/76
Inventor 刘天琪曾雪洋王顺亮董语晴江琴张海川
Owner SICHUAN UNIV