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Wind turbine generator virtual control method for improving grid-connected friend performance

A wind turbine and virtual control technology, which is applied in wind power generation, electrical components, and single-grid parallel feeding arrangement, etc., can solve problems such as the threat to the safe and stable operation of the system and the weakening of the inertial capability of the system.

Inactive Publication Date: 2021-08-31
DEZHOU POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER +1
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Problems solved by technology

[0003] As the proportion of wind power new energy continues to increase, the inertial capability of the system will be weakened, posing a serious threat to the safe and stable operation of the system

Method used

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  • Wind turbine generator virtual control method for improving grid-connected friend performance
  • Wind turbine generator virtual control method for improving grid-connected friend performance
  • Wind turbine generator virtual control method for improving grid-connected friend performance

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0028] The present invention provides a virtual control method for wind turbines that improves the friendliness of grid connection. The implementation flow chart of the method is as follows image 3 As shown, the steps include:

[0029] S10 measures the voltage, current and frequency characteristic quantities of the input and output ports of the converter, and calculates the input and output power of the virtual synchronous generator; figure 1 It is a structural diagram of the grid-connected system of wind turbines applicable to this method. In the figure, the alternating current with varying frequency and amplitude outputted by the wind turbine is passed through the three-phase rectifier to obtain direct current with constant amplitude. Similarly, the three-phase rectifie...

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Abstract

The invention provides a wind turbine generator virtual control method for improving grid-connected friend performance, in particular to a wind turbine generator converter grid-connected control method based on inertia damping coefficient self-adaptive adjustment. A virtual synchronous generator control mathematical model suitable for a converter of a wind turbine generator connected to a power grid is obtained by establishing an excitation winding electromagnetic dynamic equation and a rotor motion equation of a synchronous generator. According to the method, the influence of the rotational inertia and the damping coefficient on the system stability is analyzed, a virtual synchronous closed-loop transfer function is established, excitation control parameters of the wind power converter are optimized, a system balance point is solved, the grid-connected self-adaptive virtual synchronous control performance of the wind turbine generator is improved, the grid-connected maximum power point tracking and grid-connected adaptability of the wind turbine generator are realized, the adverse effect of the power fluctuation of the wind turbine generator on the power grid is reduced, and the high-proportion wind power grid-connected friend performance is improved.

Description

technical field [0001] The present invention relates to the grid-connected control of high-proportion new energy, and more specifically, to a virtual control method for wind turbines that improves the friendliness of grid-connected. Background technique [0002] A high proportion of wind power is connected to the grid or delivered to the load through power electronic devices such as rectifiers and converters. Compared with traditional power generation equipment (such as synchronous generators) with mature operation, power electronic converters have the advantages of quick response and flexible control. , but there are also disadvantages such as lack of inertia and damping, which brings a series of challenges to the stability of the power system. Virtual synchronous machine technology is a new type of control technology that enables power electronic devices to simulate the rotational inertia and damping characteristics of synchronous motors. [0003] As the proportion of win...

Claims

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Application Information

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IPC IPC(8): H02J3/38G06F17/11
CPCH02J3/38G06F17/11H02J2300/28Y02E10/76
Inventor 穆志军耿洪彬殷红旭宋亮于传华李振凯毛晨旭邢志同
Owner DEZHOU POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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