Virtual Synchronous Generator Control Method with Dynamic Flux Characteristic Simulation
A technology of generator control and virtual synchronization, applied in the direction of AC network voltage adjustment, single-network parallel feeding arrangement, reactive power compensation, etc., can solve the problem of complex realization and lack of better quantitative flux-linkage related parameters inertia and damping characteristics Effects and other issues to achieve the effect of reducing power consumption, avoiding the coupling of active power and reactive power, and saving costs
Active Publication Date: 2020-09-01
HEFEI UNIV OF TECH
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0008] 1. There is little research on virtual synchronous generator control methods for simulation of flux linkage variation characteristics. In order to explore more beneficial degrees of freedom in virtual synchronous generator control and improve the stability of future power grids, it is necessary to conduct in-depth and comprehensive research on flux linkage The action mechanism of characteristics in virtual synchronous generator control;
[0009] 2. The existing research on the flux linkage characteristics of the virtual synchronous generator has not quantified the influence of the relevant parameters of the flux linkage on the inertia and damping characteristics of the internal potential of the virtual synchronous generator, and the implementation is relatively complicated
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
[0050] The present invention will be further described below in conjunction with accompanying drawings and examples.
[0051] figure 1 It is the topological structure diagram of the virtual synchronous generator in the embodiment of the present invention. As shown in the figure, the DC source is converted into AC power through the inverter. The amplitude of the rated output line voltage of the inverter is 690V, and the frequency is 50Hz. The AC power is filtered by the filter inductor and filter capacitor and then connected to the three-phase active load. The specific parameters are as follows: DC source U dc =1100V, filter inductance L=7.5e-5H, filter capacitor C=3.34e-4F, the active load can set its active and reactive power, in this embodiment set the initial active power of 100kW, 0.4s Cut into 1kW inductive reactive power.
[0052] figure 2 It is an overall control block diagram of the control method of the present invention. As can be seen from this figure, the st...
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 virtual synchronous generator control method with the simulation of dynamic flux linkage characteristics. By studying the action mechanism of flux linkage characteristics invirtual synchronous generator control, the simulation of flux linkage characteristics is added in the reactive-power-voltage droop control of a traditional virtual synchronous generator, flux linkagerelated control parameters can be adjusted online, therefore, a potential in the virtual synchronous generator has a certain damping and inertia, the disturbance of grid voltage can be weakened or even suppressed, and the stability of a power grid is improved. At the same time, the adding of an additional power electronic device to an inverter system is not needed, the power consumption is reduced, and the cost is saved.
Description
technical field [0001] The invention relates to the technical field of distributed power generation and power electronics, and in particular relates to a virtual synchronous generator control method with dynamic flux linkage characteristic simulation. Background technique [0002] Most of the power in the traditional power grid is borne by large synchronous generators. Since the rotor of the synchronous generator has a mechanical moment of inertia, it can contain a large amount of kinetic energy. When the large power grid is disturbed, the kinetic energy of the rotor can be used to interact with the power grid to maintain the stability of the power grid. sex. As the penetration rate of distributed new energy generation technology continues to increase, the damping and inertia of the power system decrease, and the stability decreases. Virtual synchronous generators (Virtual synchronous generators, VSG) technology increases the inertia of the system by simulating the operatin...
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 Patents(China)
IPC IPC(8): H02J3/16H02J3/38
CPCY02E40/30
Inventor 张兴刘晓玺李明郭梓暄陈巧地朱虹王杨潘海龙高倩李飞
Owner HEFEI UNIV OF TECH