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Computer Online Debugging Method of Grid-connected Inverter

A debugging method and inverter technology, applied in the direction of instruments, measuring electricity, measuring electrical variables, etc., can solve the problems of unsynchronized comparison, uncontrollable safety, and difficulty in inverter debugging, so as to achieve fast debugging and improve safety Sexual, significant effect

Active Publication Date: 2014-10-29
北方夜视科技研究院集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, due to the particularity of the coexistence of strong and weak currents in grid-connected inverters and the non-synchronous comparison and measurement characteristics of related equipment, it is difficult to debug the inverter, and may even cause uncontrollable serious safety problems
Therefore, the existing grid-connected inverter debugging equipment and methods have certain limitations

Method used

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  • Computer Online Debugging Method of Grid-connected Inverter
  • Computer Online Debugging Method of Grid-connected Inverter
  • Computer Online Debugging Method of Grid-connected Inverter

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0038] This embodiment is an example of applying the present invention to a 5000W grid-connected inverter system. Such as figure 1 , 2 and image 3 As shown, the technical steps are as follows:

[0039] Step 1: Zero correction and configuration. Turn on the input air switch and close the output air switch. At this time, since the grid-connected inverter is in the idle state, observe the display values ​​of each physical quantity by running the RS232 debugging software in the computer. The normal value should be: grid voltage NetUac=0± 2 volts, grid current NetIac=0.0±0.2A, module voltage IpmUac=0±2V, module current IpmIac=0.0±0.4A, module DC IpmJdc=0.000±0.004A, battery current PvIdc=0.1±0.1A.

[0040] 1. If the displayed value of each physical quantity of the debugging software is within the normal value range, then complete the zero point correction and configuration;

[0041] 2. If the displayed value of each physical quantity of the debugging software is not within th...

Embodiment 2

[0057] This embodiment is an example of applying the present invention to a 2000W grid-connected inverter system. Such as figure 1 , 2 and image 3 As shown, the technical steps are as follows:

[0058] The debugging method of step 1 to step 3 is the same as the corresponding debugging method of embodiment 1; for step 4, the power is set to the rated power of 2000W, and the other debugging methods are the same; step 5 is also the same as the debugging method of step 5 of embodiment 1.

[0059] For grid-connected inverters of other power systems, as long as the power is set to the corresponding rated power, the online debugging method of the present invention is also applicable.

[0060] The online debugging method of the present invention can be applied to the debugging of most grid-connected inverter systems based on DSP / CPU.

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Abstract

The invention discloses a computer on-line debugging method for a grid-connected inverter. The method comprises the following steps of: setting a DSP (Digital Signal Processor) communication source control jumper of the grid-connected inverter into a 'debugging model', running the RS232 debugging software in the computer, performing zero correction, configuration and storage for the grid-connected inverter, and correcting, configuring and storing a voltage coefficient; setting the DSP communication source control jumper of the grid-connected inverter into a 'work mode', running the RS485 debugging software in the computer, and correcting, configuring and storing the work mode, the PID (Proportion Integration Differentiation) configuration and the current coefficient of the grid-connected inverter; observing the waveform of the grid current, if the output grid current waveform is a sine wave and identical to the sine wave of the grid voltage, finishing the debugging of the whole system; otherwise, returning back to the correction of the current coefficient and debugging again. By the method, the on-line debugging safety of the grid-connected inverter is improved, under the environment of strong interference, the effect of the method is especially remarkable; the debugging work only needs a digital multimeter, the debugging speed is fast, and the equipment investment is very low.

Description

technical field [0001] The invention belongs to the debugging technical field of grid-connected inverters, and in particular relates to a computer online debugging method for grid-connected inverters. Background technique [0002] The performance of the grid-connected inverter plays a major role in the quality of the current output from the grid-connected inverter to the grid, power characteristics and grid security. Before the grid-connected inverter leaves the factory, due to differences in performance parameters of electrical components, potential virtual soldering of electronic components, unreliable connector connections, and damage to electronic components, etc., the performance of the grid-connected inverter will deteriorate or fail. Grid connection even creates security issues. If the commissioning (inspection, correction, configuration) compensation before delivery is not carried out, the inverter will not work normally or will be out of control. The general metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 覃家川马宏斌许文田贺彦杨伟声柯伟钟毅
Owner 北方夜视科技研究院集团有限公司
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