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A full-power wind turbine control system and method with black start function

A technology for wind turbines and control systems, applied in the electrical field, can solve the problems of not being able to black start the power supply and not having the ability to operate independently and so on.

Active Publication Date: 2022-03-25
NANTONG UNIVERSITY
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional grid-connected full-power wind turbines adopt a vector control method based on grid voltage orientation. The grid-side converter needs a phase-locked loop to observe the grid voltage phase, so it does not have the ability to operate independently and cannot be used as a black start power supply.

Method used

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  • A full-power wind turbine control system and method with black start function
  • A full-power wind turbine control system and method with black start function
  • A full-power wind turbine control system and method with black start function

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Embodiment Construction

[0034] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

[0035] The invention provides a full-power wind turbine control system with a black start function, comprising: a grid-side converter for controlling the DC bus voltage of the wind turbine, a machine-side converter for controlling the wind power captured by the wind turbine, and a wind wheel for controlling the wind turbine. RPM pitch controller.

[0036] like figure 1 As shown, the control loop of the grid-side converter includes:

[0037] Per-unit value of linear bus voltage Rated per unit with DC bus voltage (ie 1.0p.u.) The difference is passed through a PI regulator as the input to the strobe switch S1 position 2, and the input to the strobe switch S1 position 1 is 0. Observing the phase θ of the AC bus voltage of the wind fa...

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Abstract

The present invention provides a full-power wind turbine control system and control method with a black start function. The control system includes: a grid-side converter for controlling the DC bus voltage of the wind turbine, and a machine-side converter for controlling the wind power captured by the wind turbine. Controller, pitch controller to control the speed of the wind rotor. According to the starting sequence of the wind turbines in the black start wind farm, the wind turbines are divided into two categories, namely the wind turbines that start first and the wind turbines that start later. The invention has the ability of independent operation, and can be used as a black start power supply to drive other wind turbines in the wind farm, gradually expand the black start of the wind farm, and restore the local load connected to the wind farm. After the load is connected, the droop control of the wind turbine unit-side converter can make the load capacity among the wind turbines in the wind farm be allocated according to the ratio of the droop control coefficient of the unit-side converter.

Description

technical field [0001] The invention relates to the technical field of electricity, in particular to a full-power wind turbine control system and method with a black start function. Background technique [0002] The black start of the power system refers to that when the entire grid or a local grid stops running due to a fault, the power generation units in the power system with the ability to start autonomously drive the units that do not have the ability to start autonomously, and gradually expand the scope of the restoration of the power system. In order to achieve the restoration of the entire power grid. The black-start power sources usually used in the current power system are fuel oil, gas-fired generator sets, and hydro-generator sets. In areas and seasons where water energy resources are scarce, it is difficult to use hydro-generator units as black-start power sources. In addition, due to the high cost of fuel oil and gas turbine generator sets, it is not suitable...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/00
CPCH02J3/381H02J3/001H02J2300/28H02J2203/20Y02E10/76
Inventor 桑顺
Owner NANTONG UNIVERSITY
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