Method and system for power supply aging

Abstract

The invention relates to a method and a system for power supply aging. The method comprises the following steps: firstly, installing a system power supply current sensor CS1 on the input end of a system power supply or installing an aging power supply current sensor CS2 on the input end of an aged power supply to detect the total input current Iin of the system or the input current Ip of the aged power supply; then, transmitting the Ip or Iin to a harmonic current detection unit of an energy-saving electronic load to carry out digital operation so as to operate harmonic content data; transmitting the harmonic content data to a DC / AC control circuit so that the DC / AC control circuit outputs grid-connected current with corresponding harmonic content; and finally, feeding back the grid-connected current Ie to the input end of the aged power supply to carry out higher harmonic cancellation compensation. The energy-saving electronic load saves the aged electricity utilization and also manages the harmonic under the condition that the cost is not basically increased or is less increased, thereby saving the cost of purchasing a large quantity of filters for a power supply plant.

Description

technical field [0001] The invention relates to an aging method of an aging device in power electronic converter technology, in particular to a method for aging a power supply device and an energy-saving electronic load device system. Background technique [0002] The traditional switching power supply aging method is to use a high-power resistor as a simulated load for burn-in aging, which wastes a lot of electric energy. In recent years, some patented technologies have emerged to solve such problems, such as [0003] Patent application number 200610041939.8, name: energy feedback AC / DC universal energy feedback electronic load simulation device; [0004] Patent No. 200720179067.1, patent name: a switching power supply energy-saving burn-in device. [0005] The basic structure of the technical solutions disclosed in the above two patents is as follows: figure 1 shown. [0006] figure 1 In , the dotted line part is the energy-saving electronic load, which includes two p...

AI Technical Summary

Problems solved by technology

[0015] 1. Pollute the power grid, reduce the effective capacity of the power grid, and increase investment in power grid construction

[0016] 2. Damage the accuracy of electric energy calculated by the electric meter

[0017] 3. Reduce the power factor of the current and waste electric energy

[0019] 5. Cause local parallel resonance and series resonance, seriously reducing power supply safety

[0020] 6. Harmonic current increases transformer copper loss, iron loss and stray loss, resulting in a decrease in load capacity, transformer heating and waste of electric energy

[0021] 7. Cause control equipment and relay protection devices to malfunction, burn equipment or trip by mistake

[0024] 10. Affect the communication system, reduce the quality of communication, cause the computer to fail to work normally, even the system crashes, and information is lost

[0025] The power supply is a typical nonlinear load, which will cause harmonic interference to the power grid. Although today's power supplies need to meet certain harmonic standards, due to the aging of a large number of power supplies from power supply manufacturers, the total harmonics are often quite considerable. Yes, in order to reduce harmonics and meet the harmonic requirements of the power supply department, manufacturers often need to purchase special active or passive power filters, which are expensive, resulting in a substantial increase in production costs

[0026] Although the traditional energy-saving electronic load can reduce the power consumption when the power plant is aging, it will bring about the problem of increased harmonic content, and the aging power often accounts for more than 80% of the power consumption of a power plant. With the large number of energy-saving electronic loads In use, the harmonic problem of the entire power plant is becoming more and more prominent, and this problem has become the bottleneck of the application of energy-saving electronic loads

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