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Convergence state detecting method and device of converter control system and storage medium

A control system and state detection technology, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as poor adaptability and high misjudgment rate of the convergence state of the converter control system

Active Publication Date: 2019-04-23
XINJIANG GOLDWIND SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003]At present, the convergence protection of the converter control system generally adopts the error protection, and the system protection is adopted by comparing the error value between the set value of the control variable and the feedback value , but this error protection method has poor adaptability, and the misjudgment rate of the convergence state of the converter control system is high

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  • Convergence state detecting method and device of converter control system and storage medium
  • Convergence state detecting method and device of converter control system and storage medium
  • Convergence state detecting method and device of converter control system and storage medium

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Embodiment Construction

[0030] Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention.

[0031] figure 1 It is a schematic diagram of the grid-connected structure of the wind power generating set involved in the embodiment of the present invention. Such as figure 1 As shown, a converter 100 is arranged between the wind power generating set and the grid.

[0032] The converter 100 sequentially includes a rectifier 101 , a braking unit 102 and an inverter 103 from the generator side to the grid side. Wherein, the power module in the rectifier 101 includes a full-bridge structure composed of 6 IGBTs, and is used for rectifying the three-phase alternating current generated by the wind power generating set. The braking unit 102 includes a half-bridge structure composed of 2 IGBTs for consuming active powe...

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Abstract

The embodiment of the invention discloses a convergence state detecting method and device of a converter control system and a storage medium. The convergence state detecting method comprises the stepsthat feedback values of target control variables of multiple phases in the converter control system are obtained; for each phase, a standard difference is calculated based on difference values between multiple feedback values of the phase within a first preset time period and a preset given value, wherein the first preset time period comprises a current moment and the (N-1) moment before thecurrent moment, and N is an integer greater than or equal to 1; standard differences of the phases and a convergence protection threshold value are compared correspondingly; and the convergence stateof a converter controller is judged according to comparison results. By adopting the technical scheme of the embodiment of the invention, the misjudging rate of the convergence state of the convertercontrol system can be lowered.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method and device for detecting a convergence state of a converter control system, and a storage medium. Background technique [0002] The wind power converter is the core component of the grid-connected electric energy of the wind power generating set. When the control variables are in a convergent state, the wind power converter control system can run stably. Among them, the control variable is in a convergent state, which means that the feedback value of the control variable follows the set value. When the feedback value deviates from the set value, the system is in an unstable state, and the control system will be unstable. [0003] At present, the convergence protection of the converter control system generally adopts error protection, and the system protection is adopted by comparing the error value between the set value of the control variable and the feedb...

Claims

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Application Information

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IPC IPC(8): G05B1/02
CPCG05B1/02Y02E10/76
Inventor 武立国郭锐
Owner XINJIANG GOLDWIND SCI & TECH