Voltage source type doubly-fed wind turbine generator active oscillation suppression method

A doubly-fed wind turbine, voltage source technology, applied in motor generator control, electronic commutation motor control, reducing/preventing power oscillation, etc., to avoid design complexity, reduce sensitivity, and increase stability.

Active Publication Date: 2021-12-14
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Literature 3 "L.Harnefors, M.Hinkkanen, U.Riaz, F.M.M.Rahman and L.Zhang.: 'Robust Analytic Design 0f Power-Synchronization Control', IEEETrans.Ind.Electron., 2019, 66, (8), pp .5810-5819" (Robust Analysis and Design of Power Synchronous Control) proposed a robust design method for droop control, which is to adjust the parameters of the power loop to suppress active oscillation, but this method depends on Parameter setting is more sensitive to parameter changes

Method used

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  • Voltage source type doubly-fed wind turbine generator active oscillation suppression method
  • Voltage source type doubly-fed wind turbine generator active oscillation suppression method
  • Voltage source type doubly-fed wind turbine generator active oscillation suppression method

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Experimental program
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Embodiment Construction

[0043] In this embodiment, the experimental platform uses a frequency converter to drive a three-phase squirrel-cage asynchronous motor to drive a double-fed generator. The voltage source doubly-fed wind turbine consists of a wind turbine, an induction motor, a rotor-side converter and a DC-side capacitor. The rotor-side converter is connected to the rotor of the generator, and the wind energy captured by the wind turbine is converted into electrical energy by an induction motor and injected into the grid.

[0044] The doubly-fed generator in this simulation platform is a wound induction motor, and its rated parameters are: rated voltage 690V, stator rated current 1400A, rotor rated current 550A, number of pole pairs is 2 pairs, stator resistance Rs=0.0043Ω , rotor resistance Rr = 0.0041Ω, stator leakage reactance Ls = 0.0125H, rotor leakage reactance Lr = 0.0126H, excitation reactance Lm = 0.0123H. The rated parameters of the rotor side converter are: rated capacity 2MW, DC ...

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Abstract

The invention provides an active oscillation suppression method based on a voltage source type doubly-fed wind turbine generator, and belongs to the technical field of wind power generation. According to the suppression method, the lead link and the lag link are added in the active power loop, the values of the lead link coefficient and the lag link coefficient are determined according to the inertia coefficient and the damping coefficient, the method does not depend on complex design of power loop parameters, and the effective suppression of active power oscillation can be achieved. According to the invention, a cross structure is used before a rotor current instruction, that is, a stator voltage d-axis component passes through a PI regulator to a rotor current instruction q-axis component, and a stator voltage q-axis component passes through the PI regulator to the rotor current instruction d-axis component, so the influence of cross coupling on the system is weakened.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a method for suppressing active power oscillation based on a voltage source type doubly-fed wind turbine. technical background [0002] As a clean and renewable energy, wind power has developed rapidly in recent years. With the increase of wind farm unit capacity, the voltage and frequency support capacity of the grid is becoming less and less. Under weak grid conditions, due to the deterioration of the performance of the phase-locked loop (PLL), the operating performance of the wind farm becomes worse. Voltage source doubly-fed wind turbine (VC-DFIG) has attracted extensive attention due to its self-synchronous control characteristics and ability to actively support grid voltage and frequency. The voltage source doubly-fed wind turbine is a multi-loop cascade control system. When the active power command and grid frequency disturbance occur, improper voltage loop bandwidth ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/40H02P21/05H02P21/22H02P21/00H02P21/26H02P21/28H02P9/30H02P101/15
CPCH02J3/241H02J3/40H02P21/05H02P21/22H02P21/0003H02P21/26H02P21/28H02P9/30H02P2101/15Y02E10/76
Inventor 谢震杨曙昕高翔张兴
Owner HEFEI UNIV OF TECH
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