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A droop control method

A control method and control parameter technology, which is applied in the direction of instruments, biological models, calculation models, etc., can solve problems such as lack of memory, achieve the effect of improving stability and reliability, and reducing parallel circulation

Active Publication Date: 2019-12-06
HUNAN UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

Compared with the swarm intelligence algorithm, this method lacks memory and has no optimal value guidance. During the optimization process, crossover and mutation have a certain probability to make good individuals worse, so the swarm intelligence algorithm is better in optimization performance.

Method used

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Embodiment Construction

[0023] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] Such as figure 1 , in a specific embodiment of the present invention, shows a schematic flow chart of an overall droop control method. Generally, it includes: step 1, based on the initial fitness value, using the improved particle swarm optimization algorithm to obtain the control parameters;

[0025] Step 2, based on the control parameters, through the decoupling droop control method, correspondingly obtain the output frequency of active droop adjustment and the output voltage of reactive droop adjustment; based on the active droop adjustment output frequency and reactive droop adjustment output voltage, the parallel inverter system control;

[0026] Step 3, bas...

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Abstract

The invention provides a sagging control method, and the method comprises the steps: proposing sagging control-decoupling sagging control; proposing an improved PSO (Particle Swarm Optimization) algorithm is proposed, which is an improved MMPSO with a multi-group and multi-speed updating mode; building an offline optimization model based on the improved PSO algorithm, wherein each inversion power supply in the model is in series connection with a reactor; supplying power to a load through parallel connection. The method can be used in the fields of new energy microgrids and uninterrupted power supply, can meet the parallel connection requirements of a plurality of inversion power supplies, can effectively reduce the parallel connection loop current, and improves the stability and reliability of a parallel connection system.

Description

technical field [0001] The present invention relates to the technical field of power electronic control, and more specifically, to a droop control method. Background technique [0002] Droop control means that according to the control target of the microgrid, the droop curve similar to that of the traditional generator is used to control the microsource, and the frequency active power droop characteristic (DroopCharacter) is used to dynamically distribute the unbalanced power of the system to each unit to ensure Unification of frequency and voltage in microgrid system. [0003] At present, the line impedances of parallel systems are different, and the coupling conditions of active power and reactive power are also different. Traditional droop control does not have power decoupling, so it is more dependent on the characteristics of line impedance. When the line impedance is inductive, the degree of power coupling is smaller than when the line impedance is resistive or resist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46G06N3/00
CPCG06N3/006H02J3/383H02J3/46H02J2203/20Y02B10/10Y02E10/56
Inventor 彭子舜王俊
Owner HUNAN UNIV
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