Method for suppressing subsynchronous oscillation of doubly-fed wind power plant based on analog inductance

A technology for simulating inductance and synchronous oscillation, applied in the direction of reducing/preventing power oscillation, single-net parallel feeding arrangement, etc., can solve problems such as incomplete and single research

Active Publication Date: 2021-03-05
NANJING UNIV OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

The current research on the subsynchronous oscillation mechanism of doubly-fed wind farms is not completely thorough, and the measures to suppress subsynchronous oscillation are relatively simple

Method used

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  • Method for suppressing subsynchronous oscillation of doubly-fed wind power plant based on analog inductance
  • Method for suppressing subsynchronous oscillation of doubly-fed wind power plant based on analog inductance
  • Method for suppressing subsynchronous oscillation of doubly-fed wind power plant based on analog inductance

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Embodiment

[0123] Under the Matlab platform, build as figure 2 In the system shown, the wind farm in the system is boosted by a transformer, and then connected to the infinite system through a series compensation line. The 100MW wind farm is composed of 50 2MW double-fed wind turbines. The specific system parameters As shown in Table 2 to Table 4:

[0124] Table 2 Induction Generator Parameters

[0125]

[0126]

[0127] Table 3 Transmission line and shafting parameters

[0128] name parameter name parameter Transformer ratio 690V / 161kV Fan inertia constant 4.29s base capacity 100MVA Generator inertia 0.90s Line resistance 0.02pu generator damping 0.00pu Line reactance 0.50pu Shaft damping system 0.00pu Transformer reactance 0.14pu wind turbine damping 1.50pu System impedance X S

0.06pu Shaft stiffness system 0.15pu / rad

[0129] Table 4 RSC controller parameters

[0130] name par...

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Abstract

The invention discloses a method for suppressing subsynchronous oscillation of a doubly-fed wind power plant based on analog inductance. The method comprises the following steps: firstly, establishinga system model of the doubly-fed wind power plant with series compensation capacitor grid connection; then applying an analog inductance control strategy to the inner loop control of a doubly-fed fanrotor side controller to control the output voltage of the rotor; secondly, performing self-adaptive online setting on the analog inductance value by utilizing a PSO algorithm, and determining an optimal value of the analog inductance under a specific working condition; and finally, applying an analog inductance control strategy and a rotor side converter control strategy to the control of the rotor side of the doubly-fed fan, and completing the suppression of the subsynchronous oscillation of the system. The method improves the electrical damping in the subsynchronous frequency band, improves the stability of the system, and can meet the subsynchronous oscillation suppression requirements under multiple working conditions.

Description

technical field [0001] The invention belongs to the technical field of wind power generator stability control, in particular to a method for suppressing subsynchronous oscillation of double-fed wind power field based on analog inductance. Background technique [0002] From the perspective of sustainable development, the fossil energy that humans currently rely on will eventually be exhausted. In order to solve current energy and environmental problems, it is an inevitable trend for the development of human society to develop and utilize clean energy to replace traditional energy. Wind energy is an ideal clean energy that is inexhaustible, environmentally friendly and pollution-free. Wind power technology is mature, can be developed on a large scale, and has good commercialization prospects. It is currently the main form of new energy power generation. In the development and utilization of wind energy resources, different types of wind turbines are used. Among the wind farms...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/38
CPCH02J3/24Y02E10/76
Inventor 单碧涵王宝华蒋海峰刘洋
Owner NANJING UNIV OF SCI & TECH
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