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An Electromechanical Transient Modeling Method for Energy Storage Based on Virtual Synchronous Generator Technology

A virtual synchronization and transient modeling technology, applied in the field of virtual synchronous machine, can solve the problems of complex energy storage electromechanical transient model, poor frequency stability, poor ability to resist load disturbance, etc., to achieve good adjustment of system response characteristics, Shorten the system stabilization time and improve the effect of output fluctuation

Active Publication Date: 2022-07-26
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Problems solved by technology

[0005] Aiming at the deficiencies in the above-mentioned background technology, the present invention proposes an energy storage electromechanical transient modeling method based on virtual synchronous generator technology, which solves the problems of the existing energy storage electromechanical transient model complexity, lack of inertia, and load disturbance resistance Poor, poor frequency stability technical problems

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  • An Electromechanical Transient Modeling Method for Energy Storage Based on Virtual Synchronous Generator Technology
  • An Electromechanical Transient Modeling Method for Energy Storage Based on Virtual Synchronous Generator Technology
  • An Electromechanical Transient Modeling Method for Energy Storage Based on Virtual Synchronous Generator Technology

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[0134] In order to verify the effectiveness of the method of the present invention, wind turbines, photovoltaic power stations and the energy storage model are added to the IEEE 4 machine 2 area for analysis. System grid structure such as Figure 14 shown, the generator G 1 , G 2 Area A and G 3 , G 4 The second area is connected by a double-circuit tie line. The rated capacity of the four generators is 900MVA, the active power output is 700MW, the grid-connected voltage is 20kV, and the transmission power of the tie line is 400MW. Among them, the generator G 3 is the balance node. The energy storage power station is connected to the bus 6, and the output power is 0 in steady state. The photovoltaic power station and the wind farm are connected to the bus bar 10, and their output powers in steady state are 48MW and 30MW, respectively.

[0135] In order to verify the effectiveness of the VSG model in suppressing the fluctuation of new energy compared with the traditional e...

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Abstract

The present invention proposes an energy storage electromechanical transient modeling method based on virtual synchronous generator technology. The phase difference of the grid voltage and the internal potential of the virtual synchronous generator; secondly, the grid-connected equivalent circuit of the energy storage converter of the virtual synchronous generator is constructed, and the active power command value and reactive power command value injected into the grid are calculated, and the Input the inner loop control model to obtain the actual output active power and actual output reactive power; finally, build the energy storage model and its constraints, and adjust the actual output active power and actual output reactive power according to the constraints of the energy storage model, Then calculate the real part of the active current and the imaginary part of the active current from the adjusted active power and reactive power and inject it into the grid. The invention can better improve the output fluctuation of the new energy unit, better adjust the response characteristics of the system, and has good versatility.

Description

technical field [0001] The invention relates to the technical field of virtual synchronous generators, in particular to an electromechanical transient modeling method for energy storage based on virtual synchronous generator technology. Background technique [0002] With the continuous increase of new energy penetration rate, the proportion of traditional synchronous generator power generation gradually decreases, and the rotating reserve capacity and moment of inertia in the power system are relatively reduced, which reduces the stable support ability and self-regulation ability of the power grid against disturbances. Safe and stable operation brings serious challenges. The energy storage system with power electronic device as the interface (such as energy storage converter) is an effective means to stabilize the output of conventional units and suppress the fluctuation of a high proportion of new energy by virtue of its rapid adjustment capability. The optimal control of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46H02J3/24H02J3/32
CPCH02J3/46H02J3/241H02J3/32H02J2203/20H02J2300/22H02J2300/28
Inventor 和萍陶玉昆赵琛李从善季玉琦李钊靳浩然宫智杰董杰
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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