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Electricity quality intelligent monitoring and resonating device

A power quality and intelligent monitoring technology, applied in circuit devices, electrical components, AC network circuits, etc., can solve the problems of increased reactance flowing through the capacitor circuit, burned capacitors and reactors, etc., to prevent flashover, stabilize voltage, The effect of improving the power quality level

Inactive Publication Date: 2011-06-15
李俭华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]This device has obvious shortcomings in the operation of the existing grid:
[0006]Because the parameters of the reactor are fixed during design, in operation, due to the influence of harmonics, parallel resonance between the capacitor and the system impedance at a certain frequency will inevitably occur, causing the current The reactance of the capacitor loop is greatly increased, and the capacitor and reactor are burned

Method used

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  • Electricity quality intelligent monitoring and resonating device
  • Electricity quality intelligent monitoring and resonating device
  • Electricity quality intelligent monitoring and resonating device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Controller 6 includes:

Embodiment 2

[0066] DSP63 for data processing, monitoring and issuing instructions;

[0067] A power quality algorithm module 62 for calculating according to the collected data;

[0068] A dynamic compensation algorithm module 64 for automatically calculating the compensation capacity by adopting the repeated learning optimal control strategy;

[0069] A manual zero-crossing monitoring module 65 for finding the zero point of the three-phase voltage and performing zero point calibration;

[0070] Execution module 66 for outputting DSP instructions;

[0071] The input end of A / D data acquisition module 61 is connected with grid system 9, and the output end is connected with DSP63; The module 66 executes the instruction of the DSP63 to command and control the switching of the switch 1 . The DSP 63 is also interactively connected with the device automation protection module 67; the output terminal of the output execution module 66 is also connected with the alarm 10 and the display 11 respe...

Embodiment 3

[0075] Example 4

[0076] The manual zero-crossing monitoring module 65 performs the following monitoring steps on the voltage Us that the A / D data acquisition module 61 collects from the power grid system 9 and converts it into a digital signal through analog-to-digital conversion:

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Abstract

The invention relates to an intelligent monitoring and tuning device of power quality, which is used to solve the problem the power quality level of a power network is lowered, and comprises a capacitor, a reactor and a control switch, wherein the input end of the control switch is connected with a power network system, and the output end is connected with the capacitor and the reactor in series,an energy absorber is connected on the reactor in series, the neutral point of a three-phase over-voltage protector is grounded after the three-phase over-voltage protector is connected with the output end of the control switch in series, a controller is connected with the power network system through the interface of an A / D data gathering module, and the output control line of the outlet is connected with a power supply box of the control switch. The intelligent monitoring and tuning device can prevent the flashover and the exploration of the control switch, which automatically chooses differential capability charge, achieves dynamic compensation, stabilizes voltage, saves energy, lowers consumption, and improves the power quality of a power network.

Description

technical field [0001] The invention relates to equipment used in a power grid, in particular to a power quality monitoring and tuning device. Background technique [0002] Static power capacitor reactive power compensation technology is a compensation technology commonly used in the market at present. Its main features are simple structure, convenient installation, operation and maintenance. However, as the power supply and consumption environment of the power grid has changed, the diversity of user loads has gradually reduced the power quality level of the power grid, and the "pollution" of the power grid has become increasingly serious, which has brought great impact on the operation and product quality of the majority of power users. had a greater impact. Among them, the reactive power compensation device of the static capacitor also faces many operational problems. One is that in many users, the compensation device invested cannot be put into operation normally after ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H01F21/02H02J3/00
CPCY02E40/30
Inventor 李俭华
Owner 李俭华
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