Photovoltaic containing power distribution network voltage drop detection compensation method

A technology of voltage sag and compensation method, applied in the direction of AC network voltage adjustment, circuit device, AC network circuit, etc., can solve the problems of lack of unified problem orientation, weak consistency of information flow transmission, etc., to improve the global optimization ability , the effect of improving precision and accuracy, high computational accuracy and robustness

Inactive Publication Date: 2017-06-09
CHANGZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER +2
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  • Application Information

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Problems solved by technology

However, MAS lacks a unified problem orientation, and the consistency of information flow in the system is weak. Therefore, its structural characteristics and interaction mechanism can only play a role with the help of evolutionary algorithms.

Method used

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  • Photovoltaic containing power distribution network voltage drop detection compensation method
  • Photovoltaic containing power distribution network voltage drop detection compensation method
  • Photovoltaic containing power distribution network voltage drop detection compensation method

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Embodiment 1

[0047] The method for detecting and compensating the voltage drop of the distribution network containing photovoltaics in this embodiment is implemented through the existing unified power quality controller (hereinafter referred to as UPQC), and the PI control parameters are adjusted by using the multi-agent chaotic particle swarm optimization algorithm to improve the impact of UPQC on Photovoltaic-containing distribution network voltage drop detection and compensation performance can effectively detect and compensate for photovoltaic-containing distribution network voltage drop.

[0048] Such as figure 1 As shown, the distribution network system containing photovoltaics is composed of mains distribution network, grid-connected photovoltaics and nonlinear loads. Unit 3, the way UPQC is connected to the photovoltaic grid-connected distribution network is as follows: figure 2 shown. The power supply unit 3 is mainly composed of a photovoltaic array and a battery device connec...

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Abstract

The invention provides a photovoltaic containing power distribution network voltage drop detection compensation method using UPQC implementation; the method comprises the following steps: 1, collecting voltage signals; 2, conditioning acquisition signals; 3, calculating a voltage drop compensation order; 4, using a multi-agent chaotic particle swarm optimization algorithm to set control parameters of a PI control unit; 5, using the set optimal PI control parameters to form and output PWM control signals; 6, outputting a compensation voltage so as to apply voltage compensation for the power distribution network. The method uses the multi-agent chaotic particle swarm optimization algorithm to set the PI control parameters of the UPQC, determines and uses the optimal PI control parameters to realize PI control, thus applying voltage compensation on the power distribution network, improving the UPQC voltage drop detection and compensation application precision and accuracy, and providing a novel method using the UPQC to manage the electric energy quality of the photovoltaic containing power distribution network.

Description

technical field [0001] The invention relates to the field of power quality detection and control of a distribution network, in particular to a method for detecting and compensating voltage drops in a distribution network containing photovoltaics by using a unified power quality regulator. Background technique [0002] The grid-connected power generation of new energy represented by photovoltaics and the increasing nonlinear load on the grid have made the grid pollution more and more serious, seriously affecting the power supply quality of the grid. In the face of new problems in the distribution network, traditional power quality management methods are becoming more and more obvious. Powerless. Unified Power Quality Conditioner (UPQC for short) is a combination of voltage-type compensation device, current-type compensation device and energy storage device, which can not only improve the quality of power supply on the grid side, but also prevent current harmonics on the load ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/12
CPCH02J3/12H02J2203/20
Inventor 张伟倪福银刘建军郭艳王琪李正明
Owner CHANGZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER
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