Intelligent RLC (resistance inductance capacitance) load and island-preventing detecting circuit

A detection circuit and anti-islanding technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as failure to reach, achieve continuous and reliable power output, and quickly and automatically detect the effect of anti-islanding performance

Inactive Publication Date: 2013-05-22
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application still uses a load with fixed physical parameters, and still can only simulate several load points of the actual load, which cannot meet the requirements of VDE-0126, IEC62116 and other standards

Method used

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  • Intelligent RLC (resistance inductance capacitance) load and island-preventing detecting circuit
  • Intelligent RLC (resistance inductance capacitance) load and island-preventing detecting circuit
  • Intelligent RLC (resistance inductance capacitance) load and island-preventing detecting circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] if Figure 5 As shown, an intelligent RLC load and anti-islanding detection circuit includes: DC power supply, inverter, switch unit, RLC adjustable load unit, waveform recorder, power grid and ADAM controller; one side of the inverter It is connected to the DC power supply, and the other side is connected in parallel with the RLC adjustable load unit and the grid; the waveform recorder tests the current waveforms of the inverter and the grid respectively; the switch unit is respectively set On the conductive path of the inverter, the RLC adjustable load unit and the power grid; the ADAM controller controls the switching unit.

[0019] Such as figure 2 As shown, the RLC adjustable load unit includes: a sequentially connected load module, a variable toroidal transformer and a temperature fuse.

[0020] The load module includes: an adjustable resistor, an adjustable inductance and an adjustable capacitor connected in parallel.

[0021] The switch unit includes: k1, k2...

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PUM

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Abstract

The invention provides an intelligent RLC (resistance inductance capacitance) load and island-preventing detecting unit which comprises a direct current power source, an inverter, switch units, an RLC adjustable load unit, a waveform recorder, a power grid and an ADAM controller. One side of the inverter is connected with the direct current power source, and the other side thereof is connected with the RLC adjustable load unit and the power grid in parallel. The waveform recorder tests current waveforms of the inverter and the power grid respectively. The switch units are arranged on conductive paths of the inverter, the RLC adjustable load unit and the power grid. The ADAM controller controls the switch units. The intelligent RLC load and island-preventing detecting circuit is capable of accurately detecting island-preventing function of a grid power source of a user side and can meet the technical requirements of standard regulations such as VDE-0126 and IEC62116.

Description

technical field [0001] The invention belongs to the field of electric power sources, and in particular relates to an intelligent RLC load and an anti-islanding detection circuit. Background technique [0002] With more and more grid-connected applications of user-side grid-connected power supplies, the demand for detection and evaluation systems for grid-connected power supplies has also increased accordingly. The island effect is a major problem in grid-connected power generation on the user side. Once the grid-connected power supply is in an island operation state, it will have very serious consequences, such as damaging the user equipment at the load end, endangering the personal safety of maintenance personnel or Re-closing when the islanding effect is not eliminated leads to asynchronous grid connection and so on. Therefore, the anti-islanding capability of the power supply must be tested before the low-voltage user-side power supply of the power grid is connected to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38G01R31/00
Inventor 李涛永杜金平薛金会闫华光王鹤范滢蒋利民苗常海黄伟荣海
Owner CHINA ELECTRIC POWER RES INST
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