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Realization method of subsynchronous interaction suppression for doubly-fed wind farm

A doubly-fed wind power and implementation method technology, applied in wind power generation, electrical components, circuit devices, etc., can solve the problem of high cost, achieve the effects of suppressing SSI, avoiding adverse effects, and benefiting robust stability

Inactive Publication Date: 2018-03-06
SHANGHAI JIAOTONG UNIV +1
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Problems solved by technology

However, the power electronic converter introduced by this technology is also a harmonic source, which will introduce new harmonics to the system. In addition, this technology includes power electronic converters and coupling transformers, which require high costs

Method used

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  • Realization method of subsynchronous interaction suppression for doubly-fed wind farm
  • Realization method of subsynchronous interaction suppression for doubly-fed wind farm
  • Realization method of subsynchronous interaction suppression for doubly-fed wind farm

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Embodiment Construction

[0018] The typical doubly-fed wind farm involved in this embodiment is used in a system for long-distance power transmission via series compensation, such as figure 1 shown. The following takes a wind farm containing 100 double-fed wind turbines as an example for long-distance transmission through a series compensation device.

[0019] Step 1: According to the structure of the actual transmission system, calculate figure 1 The values ​​of the variables in the general equivalent circuit of the doubly-fed wind farm connected to the grid through the series compensation device, where the left side of the dotted line is the equivalent circuit of the generator, R r,eq , R s,eq Respectively, the equivalent resistance of the rotor and the stator, X sr 、X ss Respectively, the equivalent reactance of rotor and stator, X m is the excitation reactance, the right side of the dotted line is the line equivalent circuit, X T is the transformer equivalent reactance, X L is the line equi...

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Abstract

The invention relates to a technology in the field of power system detection, in particular to an implementation method for sub-synchronous interaction inhibition for a double-fed wind farm. According to the method, an equivalent circuit model is designed according to a structural design of an actual power system; a sub-synchronous oscillation frequency of the actual power system is obtained by simulation; and the same low-pass filters are added in front of a d-axis current signal input end and a q-axis current signal input end of a rotor side converter controller of a double-fed wind farm system generator respectively, so that the sub-synchronous interaction is inhibited. The implementation method is simple and practical; adverse effects on the control performance and protection cooperation of the controller can be avoided under the premise of ensuring the sub-synchronous interaction inhibition effect; and the method has important engineering application value for safe and stable operation of a large-scale centralized wind power transmission system.

Description

technical field [0001] The invention relates to a technology in the field of power system detection, in particular to a method for realizing subsynchronous interaction suppression of double-fed wind farms. Background technique [0002] Large cluster wind power access is the development direction of China's power grid. The "Twelfth Five-Year Plan for Wind Power Development" issued by the National Energy Administration mentions that during the 12th Five-Year Plan period, many 10-million-kilowatt-level wind power plants will be installed in Jiuquan, Hebei, Mengxi, Mengdong, Jilin, Jiangsu coastal areas, and Shandong coastal areas. Base, wind power grid-connected installed capacity will reach 100 million kilowatts in 2015. Most of these wind power bases are far away from load centers, so they will inevitably face the problem of long-distance transmission of large-capacity wind power. [0003] Series compensation technology is an effective means for large-capacity long-distance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24H02J3/38
CPCH02J3/24H02J3/386Y02E10/76
Inventor 黄耀王西田陈昆明黄永民
Owner SHANGHAI JIAOTONG UNIV
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