CN210690657U - Power grid simulation power supply device based on harmonic generator - Google Patents
Power grid simulation power supply device based on harmonic generator Download PDFInfo
- Publication number
- CN210690657U CN210690657U CN201921179221.4U CN201921179221U CN210690657U CN 210690657 U CN210690657 U CN 210690657U CN 201921179221 U CN201921179221 U CN 201921179221U CN 210690657 U CN210690657 U CN 210690657U
- Authority
- CN
- China
- Prior art keywords
- harmonic
- fundamental wave
- generator
- output
- phase pwm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model discloses a power grid simulation power supply unit based on harmonic generator belongs to electrical control equipment technical field, but including bidirectional transmission's three-phase PWM rectifier, fundamental wave generator, harmonic generator and contactor, the three-phase PWM rectifier is connected with the electric wire netting, and three-phase PWM rectifier output is connected with fundamental wave generator respectively and is connected with harmonic generator, inserts the contactor input after fundamental wave generator's output and harmonic generator's output are connected, the output of contactor with receive the equipment connection. The utility model discloses a but two-way flow of energy is realized to two-way transmission's three-phase PWM rectifier, through compatible fundamental wave generator of public generating line design output and harmonic generator, has improved the precision of the harmonic of output.
Description
Technical Field
The utility model relates to an electrical control equipment technical field, in particular to electric wire netting analog power supply device based on harmonic generator.
Background
With the acceleration of the development pace of the Chinese power industry, the power grid is rapidly developed, the voltage operation level of a power grid system is continuously improved, the network scale is continuously enlarged, the harmonic content in the power grid is higher and higher, and technicians simulate the real operation condition of the power grid by means of a power grid simulation power supply in order to evaluate and detect the influence of the harmonic on metering and power quality equipment.
At present, the power grid simulation power supply device on the market rarely has a feedback function, and most alternating current output has no independent harmonic generator, so that the harmonic precision output by the power grid simulation power supply device is not high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a power grid simulation power supply unit based on harmonic generator to improve the precision of power grid simulation power supply unit output harmonic.
For the purpose above, the utility model discloses a power grid analog power supply device based on harmonic generator, include: the three-phase PWM rectifier is connected with a power grid, the output end of the three-phase PWM rectifier is respectively connected with the fundamental wave generator and the harmonic wave generator, the output end of the fundamental wave generator is connected with the output end of the harmonic wave generator and then connected to the input end of the contactor, and the output end of the contactor is connected with a device to be tested.
Furthermore, the output end of the three-phase PWM rectifier is connected with the fundamental wave generator and the harmonic wave generator respectively after passing through the filter capacitor.
Further, the fundamental wave generator includes fundamental wave DCAC inverter, fundamental wave transformer and fundamental wave electric capacity, fundamental wave DCAC inverter input with filter capacitor connects, and fundamental wave DCAC inverter output in proper order with fundamental wave transformer, fundamental wave electric capacity series connection.
Further, the harmonic generator comprises a fundamental wave DCAC inverter, a harmonic transformer and a harmonic capacitor, wherein the input end of the harmonic DCAC inverter is connected with the filter capacitor, and the output end of the harmonic DCAC inverter is sequentially connected with the harmonic transformer and the harmonic capacitor in series.
Compared with the prior art, the utility model discloses there are following technological effect: the utility model discloses a but the two-way flow of energy is realized to two-way transmission's three-phase PWM rectifier, and the output line of three-phase PWM rectifier is as public generating line, and fundamental wave generator and harmonic generator establish ties on public generating line, through public generating line design output compatible fundamental wave generator and harmonic generator, has adopted independent harmonic generator unit to the precision of the harmonic of output has been improved. The utility model provides a power grid analog power supply device can be used to test of scenes such as excessive pressure, under-voltage, cross-frequency, under-frequency, high accuracy harmonic stack, flicker and low-voltage ride through, prevent island and use.
Drawings
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings:
fig. 1 is a schematic structural diagram of a power grid analog power supply device based on a harmonic generator.
Detailed Description
To further illustrate the features of the present invention, please refer to the following detailed description and accompanying drawings. The drawings are for reference and illustration purposes only and are not intended to limit the scope of the present disclosure.
As shown in fig. 1, the present embodiment discloses a power grid simulation power supply device based on a harmonic generator, which includes a three-phase PWM rectifier 1 capable of bidirectional transmission, a fundamental wave generator, a harmonic generator, and a contactor 9, wherein a power grid is connected to the three-phase PWM rectifier 1 as an input, common buses at output ends of the three-phase PWM rectifier 1 are respectively connected to an input end of the fundamental wave generator and an input end of the harmonic generator, an output end of the fundamental wave generator is connected to an output end of the harmonic generator and then connected to an input end of the contactor 9, and an output end of the contactor 9 is connected to a. In the embodiment, the bidirectional flow of energy is realized by adopting the three-phase PWM rectifier 1 capable of bidirectional transmission, and the bidirectional flow of energy aims to ensure that the power grid simulation power supply device has the source and load functions. The output end of the three-phase PWM rectifier 1 is connected with a line to be used as a common bus, and the common bus of the fundamental wave generator and the harmonic generator is designed, so that the output of the three-phase PWM rectifier is compatible with the fundamental wave generator and the harmonic generator, and an independent harmonic generator unit is adopted, thereby improving the precision of the output harmonic.
Furthermore, the output end of the three-phase PWM rectifier 1 is connected with the fundamental wave generator and the harmonic wave generator respectively after passing through the filter capacitor 2. The power grid outputs bus voltage through the three-phase PWM rectifier 1, and the bus voltage is filtered through the filter capacitor 2 to achieve stable bus voltage output.
Further, the fundamental wave generator includes fundamental wave DCAC inverter 3, fundamental wave transformer 4 and fundamental wave electric capacity 5, fundamental wave DCAC inverter 3 input with filter electric capacity 2 is connected, fundamental wave DCAC inverter 3 output in proper order with fundamental wave transformer 4, fundamental wave electric capacity 5 series connection. The fundamental wave DCAC inverter 3 performs standard sine wave modulation on the input bus voltage and then realizes electrical isolation through the fundamental wave transformer 4. Meanwhile, the fundamental wave transformer 4 and the fundamental wave capacitor 5 form an LC filter for filtering higher harmonics and realizing sinusoidal fundamental wave output.
Further, the harmonic generator comprises a harmonic DCAC inverter 6, a harmonic transformer 7 and a harmonic capacitor 8, wherein the input end of the harmonic DCAC inverter 6 is connected with the filter capacitor 2, and the output end of the harmonic DCAC inverter 6 is sequentially connected with the harmonic transformer 7 and the harmonic capacitor 8 in series. The bus voltage output by the three-phase PWM rectifier 1 is subjected to standard higher harmonic modulation by the harmonic DCAC inverter 6 and then is electrically isolated by the harmonic transformer 7. Meanwhile, the harmonic transformer 7 and the harmonic capacitor 8 form an LC filter for filtering out higher harmonics of the switching order and realizing higher harmonic output. The higher harmonic and the fundamental wave generated by the fundamental wave generator are coupled and connected in series through a transformer, the fundamental wave voltage and the harmonic voltage are superposed by the transformer coupling and the series connection, and the superposed voltage is output to the contactor 9.
In the embodiment, the DSP processor is adopted, and the SPWM technology and the direct digital frequency synthesis waveform technology are adopted in the software algorithm, so that the waveform output frequency stability is high, the continuity is good, not only can continuous, pure and stable sinusoidal voltage be provided, but also various harmonic waves in a power grid can be simulated, and the application scene is wide.
Preferably, the power grid analog power supply device in this embodiment is further provided with a DSP processor for detecting the output voltage and current, rapidly detecting overcurrent, overload, overvoltage, and output short circuit, automatically protecting and cutting off the output, and issuing an alarm.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (4)
1. A power grid analog power supply device based on a harmonic generator is characterized by comprising: the power grid is connected with the three-phase PWM rectifier for input, a common bus of the output end of the three-phase PWM rectifier is respectively connected with the input end of the fundamental wave generator and the input end of the harmonic wave generator, the output end of the fundamental wave generator is connected with the output end of the harmonic wave generator and then connected with the input end of the contactor, and the output end of the contactor is connected with a device to be tested.
2. A grid analog power supply device based on a harmonic generator as claimed in claim 1, characterized in that the output of the three-phase PWM rectifier is connected to the fundamental generator and to the harmonic generator, respectively, after passing through a filter capacitor.
3. The harmonic generator based grid analog power supply apparatus according to claim 2, wherein the fundamental wave generator comprises a fundamental wave DCAC inverter, a fundamental wave transformer, and a fundamental wave capacitor, wherein an input end of the fundamental wave DCAC inverter is connected to the filter capacitor, and an output end of the fundamental wave DCAC inverter is connected in series with the fundamental wave transformer and the fundamental wave capacitor.
4. A grid analog power supply unit based on a harmonics generator according to claim 2, characterized in that the harmonics generator comprises a fundamental DCAC inverter, a harmonic transformer and a harmonic capacitor, the harmonic DCAC inverter input being connected to the filter capacitor, the harmonic DCAC inverter output being in turn connected in series with the harmonic transformer and the harmonic capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921179221.4U CN210690657U (en) | 2019-07-24 | 2019-07-24 | Power grid simulation power supply device based on harmonic generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921179221.4U CN210690657U (en) | 2019-07-24 | 2019-07-24 | Power grid simulation power supply device based on harmonic generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210690657U true CN210690657U (en) | 2020-06-05 |
Family
ID=70883973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921179221.4U Active CN210690657U (en) | 2019-07-24 | 2019-07-24 | Power grid simulation power supply device based on harmonic generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210690657U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114256845A (en) * | 2021-12-07 | 2022-03-29 | 阳光电源股份有限公司 | Power grid simulation device and high-frequency harmonic current control method thereof |
-
2019
- 2019-07-24 CN CN201921179221.4U patent/CN210690657U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114256845A (en) * | 2021-12-07 | 2022-03-29 | 阳光电源股份有限公司 | Power grid simulation device and high-frequency harmonic current control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104034982A (en) | Electric energy quality harmonic disturbance source platform | |
| CN204228843U (en) | A kind of AC network simulator topological structure | |
| CN103760441B (en) | A kind of Multifunctional adjustment table of distribution box | |
| CN203071576U (en) | Multi-voltage level harmonic disturbance source generation system | |
| CN203522549U (en) | Distributed power grid-connected inverter testing ac source capable of island test | |
| CN202737463U (en) | Active filtering device with energy-saving, consumption-reducing and harmonic-treating functions | |
| CN210690657U (en) | Power grid simulation power supply device based on harmonic generator | |
| CN204271736U (en) | A kind of fire-fighting emergency power supply cabinet | |
| CN203759152U (en) | Multifunctional adjustment table of distribution box | |
| CN203745563U (en) | Low-voltage switchgear electrical performance integrated testing stand | |
| CN110967579A (en) | Test source of no-load metering loop automatic detection equipment | |
| CN103743931A (en) | High-power grid voltage simulation circuit | |
| CN203630241U (en) | All-in-one device for testing power frequency parameters and switching test line for high-voltage power transmission line | |
| CN103457264B (en) | Active power filter device with energy saving, consumption reducing and harmonic suppression | |
| CN201805228U (en) | Special low-voltage active power filter for tobacco industry | |
| CN205263208U (en) | Many function test platform | |
| CN204304440U (en) | A kind of stillness wattless occurrence apparatus for three phase network | |
| CN207780125U (en) | A kind of test device for relay protection | |
| CN205610331U (en) | Portable invertion power supply breakdown van | |
| CN203251092U (en) | Multifunctional transition source box | |
| CN105158618A (en) | Multifunctional test platform | |
| CN203233315U (en) | Alternating current power supply for simulating characteristics of power grid | |
| CN216310228U (en) | Battery simulator based on bidirectional DC-AC converter | |
| CN208015380U (en) | A kind of power electronics island load simulator | |
| CN204216791U (en) | Single-phase programmable current source apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: No.8 Dalong Road, hi tech Zone, Hefei City, Anhui Province Patentee after: Hefei Kewei Power System Co.,Ltd. Address before: 230088 Building 2, Hupu Industrial Park, No. 4715, Wangjiang West Road, hi tech Zone, Hefei City, Anhui Province Patentee before: Hefei Kewei Power System Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 230088 No.8 DALONGSHAN Road, hi tech Zone, Hefei City, Anhui Province Patentee after: Hefei Kewei Power System Co.,Ltd. Address before: No.8 Dalong Road, hi tech Zone, Hefei City, Anhui Province Patentee before: Hefei Kewei Power System Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230088 No.8 DALONGSHAN Road, hi tech Zone, Hefei City, Anhui Province Patentee after: Cowell Technology Co.,Ltd. Address before: 230088 No.8 DALONGSHAN Road, hi tech Zone, Hefei City, Anhui Province Patentee before: Hefei Kewei Power System Co.,Ltd. |