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Active support control method of new energy power generation equipment for power grid frequency

A technology of power grid frequency and control method, which is applied in the direction of circuit devices, electrical components, harmonic reduction devices, etc., can solve the problems of inability to be modularized and poor portability, and achieve slowing down of system frequency changes, strong portability, and universality Effect

Active Publication Date: 2021-06-15
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a new energy power generation equipment active support control method for grid frequency, which is used to solve the problem that the existing grid frequency active support control method has poor portability and cannot be modularized The problem

Method used

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  • Active support control method of new energy power generation equipment for power grid frequency
  • Active support control method of new energy power generation equipment for power grid frequency
  • Active support control method of new energy power generation equipment for power grid frequency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A new energy power generation device actively support control method for grid frequency, such as figure 1 As shown, including:

[0039] Step 110, obtain the real time angular frequency deviation signal by the phase-locked loop of the new energy power plant, and the angular frequency deviation signal is compensated and limited to the compensation link, resulting in a constant compensation angle signal;

[0040] Step 120, the compensation angular signal is poor in the original phase angle output signal obtained by the phase-locked loop based on the angular frequency deviation signal to obtain a new phase-locked angle signal;

[0041]Step 130, the control loop of the new energy power plant is based on the new phase-locked angle signal, generates a control signal for the grid, and realizes the active support of the new energy power generation device to the grid frequency.

[0042] When the grid frequency offset rated rated value is detected, the compensation link outputs the co...

Embodiment 2

[0069] A new energy power generation equipment control method, including:

[0070] The power-time angular frequency deviation signal is acquired, which is obtained by the PI control output of the phase-locked loop of the new energy power generation equipment;

[0071] Based on the angular frequency deviation signal, an active support control method of the grid frequency is obtained by a new energy power generation equipment according to the above embodiment, and is obtained by the phase-locked angle signal θ. pll ;

[0072] Locking loop signal θ pll , Using vector control, controls new energy power equipment to the grid output active power, reactive power.

[0073] Using the improved phase lock ring as described above, after obtaining the angular frequency deviation signal by the PI, the output signal of the compensation link and the limit link is poor with the phase angle signal of the original phase-locked loop, and the coordinates of the grid frequency disturbance are obtained....

Embodiment 3

[0077] A computer readable storage medium comprising a stored computer program in which a new energy power generation of the storage medium is controlled when the computer program is operated by the processor. Equipped with an active support control method of the grid frequency and / or a control method of a new energy power generation equipment as described above.

[0078] Related Art Solutions To THE Embodiment One and Example 2, hereby referred to herein.

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Abstract

The invention belongs to the field of active frequency support of new energy power generation equipment, and particularly discloses an active support control method of new energy power generation equipment for power grid frequency. The method comprises the steps of acquiring a power grid angular frequency deviation signal in real time through a phase-locked loop; processing the angular frequency deviation signal through a compensation link to obtain a compensation angle signal after amplitude limiting, and subtracting the compensation angle signal from an original phase angle signal output by the phase-locked loop to obtain a phase-locked angle signal; and generating a control signal by a control loop of the new energy power generation equipment based on the phase-locked angle signal so as to achieve active support of the new energy power generation equipment on the power grid frequency. According to the method, the power grid angular frequency deviation is introduced into the output phase angle of the phase-locked loop through a compensation link, so that the new energy power generation equipment has the active frequency support capability, is suitable for various new energy power generation equipment comprising the phase-locked loop under traditional vector control, can effectively provide active frequency support when frequency disturbance occurs in the power grid, is high in portability, and is easy to realize the modular design of the frequency support function.

Description

Technical field [0001] The present invention belongs to the new energy power generation equipment active frequency support, and more particularly, the present invention relates to a new energy power generation equipment for an active support control method of grid frequency. Background technique [0002] In order to achieve the goal of national green low-carbon development, optimize the energy structure, significantly increase the proportion of new energy power generation in the grid, is the target requirement to be achieved. However, with a large-scale new energy power generation equipment access power system, the stability of the system is threatened. As an example, the frequency fluctuation of the power system under the new energy of high permeability is significantly increased, in other words, the frequency stability of the power system is significantly reduced. To address the above problems, the power system requires new energy power generation equipment to have active frequ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/24H02J3/01
CPCH02J3/381H02J3/24H02J3/01H02J2300/28Y02E40/40
Inventor 邹旭东郭祥梁毅马玉梅杨怡航朱东海
Owner HUAZHONG UNIV OF SCI & TECH
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