Blocking filtering method for inhibiting subsynchronous resonance of series compensated transmission system of doubly-fed wind power plant

A technology of sub-synchronous resonance and power transmission system, which is applied in wind power generation, reduction/prevention of power oscillation, single-network parallel feeding arrangement, etc., and can solve economic losses, limited application range, fan off-grid and crowbar circuit damage, etc. problem, to achieve the effect of low investment cost, simple parameter design, and suppression of subsynchronous resonance problem

Active Publication Date: 2015-10-14
TSINGHUA UNIV +3
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Problems solved by technology

However, the connection of double-fed wind farms to the power system with fixed series compensation is likely to cause a power system stability problem, that is, subsynchronous resonance (Subsynchronous Resonance, SSR)
In September 2009, a wind farm SSR accident occurred in a wind farm in T

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  • Blocking filtering method for inhibiting subsynchronous resonance of series compensated transmission system of doubly-fed wind power plant
  • Blocking filtering method for inhibiting subsynchronous resonance of series compensated transmission system of doubly-fed wind power plant
  • Blocking filtering method for inhibiting subsynchronous resonance of series compensated transmission system of doubly-fed wind power plant

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Embodiment Construction

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0023] A blocking filter method for suppressing subsynchronous resonance of a doubly-fed wind farm series compensation transmission system according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0024] Before describing the method of the embodiment of the present invention, first combine figure 2 Describe the specific structure of the doubly-fed wind farm series compensation transmission system. like figure 2 As shown, the series compensation transmission system of th...

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Abstract

The invention provides a blocking filtering method for inhibiting subsynchronous resonance of a series compensated transmission system of a doubly-fed wind power plant. The series compensated transmission system comprises a DFIG (Doubly-Fed Induction Generator) wind power plant and the series compensated transmission system connected with the DFIG wind power plant, wherein the wind power plant comprises induction motor, a power electronic converter and a power electronic converter control system; the method comprises the steps: selecting a blocking filter, wherein the blocking filter is used for filtering an SSR (subsynchronous resonance) modal signal in a control signal of the power electronic converter control system; analyzing a subsynchronous characteristic of the series compensated transmission system of the doubly-fed wind power plant and determining the characteristic frequency and bandwidth of the blocking filter; analyzing the structure of the power electronic converter control system so as to determine a plurality of embedded points therefrom; and embedding the blocking filter after parameters setting into at least one embedding point so as to filter the SSR modal signal in the control signal of the power electronic converter control system. The method provided by the invention can be used for effectively inhibiting subsynchronous resonance problem of the series compensated transmission system of the doubly-fed wind power plant.

Description

technical field [0001] The invention relates to the technical field of power system control, in particular to a blocking filter method for suppressing subsynchronous resonance of a series compensation transmission system of a doubly-fed wind farm. Background technique [0002] Wind power is a clean and non-polluting renewable energy source, suitable for large-scale development and utilization with a relatively mature technology, and has become a mainstream energy source in some countries and regions. Doubly-fed Induction Generator (DFIG) has been widely used in actual wind farms because of its advantages of variable speed and constant frequency operation, high wind energy conversion efficiency, and flexible power control. DFIG uses two back-to-back voltage source converters connected through a DC link for AC excitation. Among them, the converter connected to the DFIG rotor is called the Rotor Side Converter (Rotor Side Convertor, RSC), and the control of the RSC can realize...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/24
CPCY02E10/76
Inventor 谢小荣刘华坤李雨刘辉李蕴红胡应宏刘汉民朱斯
Owner TSINGHUA UNIV
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