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Self-adaptive variable-parameter frequency modulation method and device for doubly-fed variable-speed pumped storage unit

A pumped-storage unit, self-adaptive technology, applied in computational models, control generators, biological models, etc., to achieve the effect of good frequency modulation performance

Active Publication Date: 2022-08-02
HOHAI UNIV
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Problems solved by technology

[0004] The present invention provides a double-fed type variable-speed pumped storage unit adaptive variable parameter frequency modulation method and device, which solves the problems disclosed in the background technology

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  • Self-adaptive variable-parameter frequency modulation method and device for doubly-fed variable-speed pumped storage unit
  • Self-adaptive variable-parameter frequency modulation method and device for doubly-fed variable-speed pumped storage unit
  • Self-adaptive variable-parameter frequency modulation method and device for doubly-fed variable-speed pumped storage unit

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Embodiment Construction

[0075] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

[0076] The self-adaptive variable-parameter frequency modulation method for a doubly-fed variable-speed pumped-storage unit includes the following steps:

[0077] Step 1, detecting the rotational speed, frequency deviation and frequency deviation rate of change of the doubly-fed variable-speed pumped-storage unit;

[0078] Step 2, in response to the frequency deviation exceeding the dead zone, obtain the corresponding upper limit of the frequency modulation parameter from the pre-generated upper limit curve of the frequency modulation parameter under different working conditions according to the rotating speed, and determine the positive and negative of the upper limit of the frequen...

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Abstract

The invention discloses a self-adaptive variable-parameter frequency modulation method and device for a doubly-fed variable-speed pumped storage unit, and the method comprises the steps: carrying out the frequency modulation parameter optimization of a unit under a plurality of typical working conditions with the rotation speed and power limitation as constraints, and generating a frequency modulation parameter upper limit curve under different working conditions in advance; the rotating speed, the frequency deviation and the frequency deviation change rate of the doubly-fed variable-speed pumped storage unit are detected in real time in the frequency modulation process, the corresponding frequency modulation parameter upper limit is obtained from the upper limit curve according to the rotating speed, the symbol is adjusted according to the frequency deviation change rate, and therefore frequency modulation parameters are obtained, stable operation of the unit in different states can be guaranteed, and the frequency modulation efficiency is improved. And the frequency modulation capacity of the unit can be utilized to the maximum extent, so that the unit has good frequency modulation performance under different working conditions and different operation states.

Description

technical field [0001] The invention relates to a method and a device for self-adaptive variable-parameter frequency regulation of a doubly-fed variable-speed pumped-storage unit, belonging to the field of power system energy storage. Background technique [0002] The doubly-fed variable-speed pumped-storage unit is a research and construction hotspot in the field of pumped-storage units in recent years. Because the variable speed operation can be realized within a certain range, the doubly-fed variable speed pumped storage unit can not only overcome the problem of low efficiency caused by the constant motor speed of the conventional pumped storage unit, but also can continuously adjust the power under pumping conditions. Different working conditions can participate in grid frequency regulation. However, due to the control strategy adopted by the doubly-fed variable-speed pumped-storage unit, the speed of the unit will be decoupled from the grid frequency, and the unit cann...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/48H02J3/50H02J3/28H02J15/00H02P9/04G06N3/00H02P101/10
CPCH02J3/241H02J3/48H02J3/50H02J3/466H02J3/381H02J3/28H02J15/003H02P9/007H02P9/04G06N3/006H02J2300/20H02P2101/10Y02E60/16
Inventor 史林军
Owner HOHAI UNIV
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