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Micro-grid harmonic suppression method, electronic equipment and computer medium

A harmonic suppression and microgrid technology, applied in AC network to reduce harmonics/ripple, calculation, harmonic reduction devices, etc., can solve the problems of increasing treatment costs, increasing the complexity of device operation and maintenance, and large limitations. , to achieve the effect of simple structure, good harmonic suppression effect and high voltage utilization rate

Pending Publication Date: 2022-04-12
SHANGHAI DIANJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, when using instantaneous reactive power to detect harmonics, it is easy to be affected by three-phase unbalance and various unstable loads. This method has great limitations in suppressing harmonics. On the other hand, adding APF , DVR and other certain types of adjustment devices will not only greatly increase the treatment cost, but also increase the complexity of device operation and maintenance

Method used

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  • Micro-grid harmonic suppression method, electronic equipment and computer medium
  • Micro-grid harmonic suppression method, electronic equipment and computer medium
  • Micro-grid harmonic suppression method, electronic equipment and computer medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for harmonic suppression of microgrid, such as figure 1 and image 3 ,include:

[0049] The harmonics of the microgrid are suppressed through the active control step, and if the harmonic content of the microgrid does not meet the standard conditions at this time, the harmonics of the microgrid are jointly suppressed through the active control step and the passive control step;

[0050] Among them, the active control steps include:

[0051] The microgrid harmonics are detected by the ip-iq method. According to the detected microgrid harmonics, the compensation current is generated through the grid-connected inverter using constant power control (PQ control), and the compensation current is combined with the grid-connected current required by the grid. As the reference current, the reference current is input into the grid through a grid-connected inverter based on PI control;

[0052]When the microgrid is connected to the grid, the inverter adopts simplified c...

Embodiment 2

[0074] An electronic device includes a memory and a processor, the memory stores a computer program, and the processor invokes the program instructions to execute the microgrid harmonic suppression method described in Embodiment 1.

Embodiment 3

[0076] A computer-readable storage medium, including a computer program, the computer program can be executed by a processor to implement the method for suppressing harmonics in a microgrid described in Embodiment 1.

[0077] Embodiment 1, Embodiment 2 and Embodiment 3 propose a microgrid harmonic suppression method, electronic equipment and computer media, and adopt a new strategy combining active control and passive control to improve the quality of the power grid. During the active control process, the inverter The control uses the improved ip-iq method to detect harmonics, adding a PI controller to make the harmonic detection process more stable and less affected by various loads and voltage imbalances. In the passive control process, UPQC is installed on the line, and the UPQC structure adopts SVPWM and PWM control methods are used as the control methods of the series side and the parallel side to compensate the distorted voltage and harmonic current, the control is simple...

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Abstract

The invention relates to a micro-grid harmonic suppression method, electronic equipment and a computer medium, and the method comprises the steps: suppressing micro-grid harmonic waves through an active control step, and if the content of the micro-grid harmonic waves does not meet a standard condition at the moment, jointly suppressing the micro-grid harmonic waves through the active control step and a passive control step; wherein the active control step comprises the steps of detecting micro-grid harmonic waves through an ip-iq method, generating compensation current through a grid-connected inverter adopting constant power control according to the detected micro-grid harmonic waves, synthesizing the compensation current and grid-connected current required by a power grid into reference current, and inputting the reference current into the power grid through the grid-connected inverter based on PI control; the passive control step comprises the step of inhibiting micro-grid harmonic waves by adding a UPQC on a power grid line. Compared with the prior art, the harmonic suppression effect is good, the stability is high, and the operation and maintenance cost is saved.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to a method for suppressing harmonics in a micro-grid, electronic equipment and computer media. Background technique [0002] Electricity is the driving force of the national economy and the main form of energy in a country. The development of the power industry has greatly promoted the growth of the national economy. Currently, electricity mainly relies on the combustion of traditional fossil fuels for power generation. With the continuous consumption of traditional energy sources, people are increasingly aware of the significance of developing new clean energy sources. Microgrids can use various types of energy, which can reduce the use of non-renewable energy by human beings. A microgrid is a small power system, including distributed power sources, energy storage devices, energy conversion devices, loads and protection systems. Power quality problems will arise from elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/24H02J3/01H02J3/18G06Q10/06
CPCY02E40/30Y02E40/40Y04S10/50
Inventor 王勉刘天羽段震宇
Owner SHANGHAI DIANJI UNIV
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