CN207398834U - A kind of series voltage compensation device based on Power Electronic Technique - Google Patents
A kind of series voltage compensation device based on Power Electronic Technique Download PDFInfo
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- CN207398834U CN207398834U CN201721318462.3U CN201721318462U CN207398834U CN 207398834 U CN207398834 U CN 207398834U CN 201721318462 U CN201721318462 U CN 201721318462U CN 207398834 U CN207398834 U CN 207398834U
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Abstract
The utility model proposes a kind of series voltage compensation devices based on Power Electronic Technique, the alternating current of power grid is made by direct current using uncontrollable rectification module, energy-storage module stores the direct current of uncontrollable rectification module output and powers for converter module, signal sampling module collection voltages signal and current signal simultaneously transmit a signal to digital signal processing module, digital signal processing module calculates analysis digital signal and obtains real-time voltage offset data and export control instruction, it is alternating current that converter module, which receives the DC inverter for exporting energy-storage module after control instruction, the voltage of the alternating current is after the processing of LC filter modules, power grid is coupled to by series coupled transformer module.Above-mentioned voltage compensating device carries out calculating analysis using digital signal processor module, and fast response time can dynamically compensate low-voltage, and can inhibit overvoltage, voltage dip and voltage swell in real time.
Description
Technical field
The utility model is related to series voltage compensation technique field, the series voltage for being based especially on Power Electronic Technique is mended
Repay device.
Background technology
Power electronic equipment is widely used in life, such as：AC-DC switch in electric welding machine, electric arc furnaces, industry becomes
Changing device, with its development, these power electronic equipments are higher and higher to the quality requirement of external power supply electric energy, and power quality is asked
Topic becomes more and more important.And since user to the attention rate of power quality and requires higher and higher, it was not considered as before very much
The event of power failure all becomes power quality problem now.
Series voltage compensation device is series between load and power grid, and when Voltage Drop occurs for system, device output is mended
Repay voltage, it is ensured that load side voltage is stablized, and load is made to fall influence from system voltage.The inverter of series voltage compensation device
The quality of control method and control system is then directly related to the quality of its function realization and the safety and stability of device.It is existing
Influence of the series voltage compensation device due to sampling, calculating analysis delay, control signal lag output cause the stability of system
Difference.
Utility model content
To solve the above-mentioned problems, this practicability newly proposes that one kind can dynamically compensate low-voltage in real time, and can inhibit
The voltage compensating device of overvoltage, voltage dip and voltage swell.
What the utility model was achieved through the following technical solutions：A kind of series voltage compensation dress based on Power Electronic Technique
It puts, including：
Uncontrollable rectification module connects power grid, alternating current is made into direct current；
Energy-storage module receives and stores the direct current of the uncontrollable rectification module output；
Converter module receives the direct current of the energy-storage module output, and the direct current that the energy-storage module is exported
Inversion is alternating current；
Signal sampling module gathers the voltage signal in power grid, the d. c. voltage signal that the energy-storage module exports and institute
It states the current signal of converter module output and the analog-signal transitions in signal will be gathered as digital signal；
LC filter modules are filtered the voltage in the alternating current of converter module output；
Digital signal processing module receives the digital signal of the signal sampling module output, is obtained by calculating analysis
Real-time compensation data, and control instruction is exported to the converter module and the LC filter modules；
Filtered alternating voltage is coupled to power grid by series coupled transformer module.
Further, the series voltage compensation device based on Power Electronic Technique further includes bypass protection module, institute
Stating bypass protection module includes breaker and bidirectional thyristor, the bypass protection module and the series coupled transformer module
Connection, the bypass protection module are used for unit protection and bypass changeover.
Further, the uncontrollable rectification module includes diode, and the diode forms rectifier bridge, the rectifier bridge
The alternating current of power grid is made into direct current and is charged to the energy-storage module.
Further, the energy-storage module includes super capacitor and current-limiting resistance, can not described in the super capacitor storage
The direct current for controlling rectification module output is simultaneously powered for the converter module, and the current-limiting resistance is connected use with the super capacitor
To limit the electric current in branch.
Further, the converter module includes inverter bridge and IGBT drive module, and the inverter bridge is by the energy storage
The DC voltage inversion of module output is alternating voltage, and the IGBT drive module receives the digital signal processing module output
Control instruction and converter module described in break-make circuit.
Further, the signal sampling module includes current sensor, voltage sensor, filter amplification circuit and A/
D conversion chips, the current sensor gather the current signal of the converter module output, the voltage sensor acquisition electricity
The d. c. voltage signal of voltage signal and energy-storage module output in net, the current signal collected and voltage signal pass through
The analog signal that will be gathered to the A/D conversion chips, the A/D conversion chips in signal is exported after the filter amplification circuit
It is converted into digital signal and by digital data transmission to the digital signal processing module.
Further, the LC filter modules include filter unit, and the filter unit includes filter capacitor and filtered electrical
Sense.
Further, the digital signal processing module includes the DSP module and FPGA module that are connected with each other；
The DSP module connects the signal sampling module and the data of signal sampling module acquisition is calculated
It analyzes to obtain real-time compensation data；
The FPGA module connects the signal sampling module, the IGBT drive module and the bypass protection mould respectively
Block, the FPGA module receive the real-time compensation data of the DSP module transmission and are referred to according to real-time compensation Data Transmission Controlling
Order, the FPGA module control the signal sampling modules acquiring data and control break-make and the institute of the IGBT drive module
State the break-make of bypass protection module.
Further, the series coupled transformer module includes series transformer, and the series transformer is by the LC
The filtered voltage of filter module is coupled to power grid.
Series voltage compensation device provided by the utility model based on Power Electronic Technique uses digital signal processor
Module carries out data and calculates analysis, and the analysis to network voltage detection and compensation is completed within the extremely short time, and then controls and becomes
The compensation of device network voltage is flowed, response speed is exceedingly fast, and the series voltage compensation device to power grid by carrying out real-time voltage benefit
Removal voltage dip, voltage swell, low-voltage and overvoltage are repaid, proof load continues even running and is not disrupted.
Description of the drawings
Fig. 1 is the structure diagram of the series voltage compensation device based on Power Electronic Technique.
Specific embodiment
In order to it is clearer, completely illustrate the technical solution of the utility model, below in conjunction with the accompanying drawings to the utility model
It is described further.
It please refers to Fig.1, the utility model proposes a kind of series voltage compensation device based on Power Electronic Technique, including：
Uncontrollable rectification module 1, energy-storage module 2, converter module 3, signal sampling module 4, LC filter modules 5, Digital Signal Processing
Module 6, series coupled transformer module 7, bypass protection module 8.
Specifically, the uncontrollable rectification module 1 connects power grid, alternating current is made into direct current；The energy-storage module 2 connects
Receive and store the direct current that the uncontrollable rectification module 1 exports；The converter module 3 receives the energy-storage module 2 and exports
Direct current, and the DC inverter that the energy-storage module 2 is exported be alternating current；The signal sampling module 4 gathers power grid
In voltage signal, the energy-storage module 2 export d. c. voltage signal and the converter module 3 export current signal simultaneously
It is digital signal by the analog-signal transitions gathered in signal；The friendship that the LC filter modules 5 export the converter module 3
Voltage in galvanic electricity is filtered；The digital signal processing module 6 receives the number that the signal sampling module 4 exports
Signal obtains real-time compensation data by calculating analysis, and exports control instruction and filtered to the converter module 3 and the LC
Ripple module 5；Filtered alternating voltage is coupled to power grid by the series coupled transformer module 7.
Series voltage compensation device provided by the utility model based on Power Electronic Technique uses digital signal processor
Module carries out data and calculates analysis, and the analysis to network voltage detection and compensation can be completed within the extremely short time, and then is controlled
The compensation of current transformer network voltage processed, response speed are exceedingly fast.
Preferably, the series voltage compensation device based on Power Electronic Technique further includes bypass protection module 8, institute
Stating bypass protection module 8 includes breaker 81 and bidirectional thyristor 82, and the bypass protection module 8 becomes with the series coupled
Depressor module 7 connects, and the bypass protection module 8 is used for unit protection and bypass changeover.The setting of bypass protection module 8 is used for
Unit protection and bypass changeover, when voltage compensating device breaks down, by shut-off bidirectional thyristor 82 and close circuit breaker 81
Road device repairs convenient for device, while ensures power grid energy release unit normal operation.
Preferably, the uncontrollable rectification module 1 includes diode 11, and the diode 11 forms rectifier bridge 12, described
The alternating current of power grid is made into direct current and charged to the energy-storage module 2 by rectifier bridge 12.
Preferably, the energy-storage module 2 includes super capacitor 21 and current-limiting resistance 22, and the super capacitor 21 stores institute
State the direct current that uncontrollable rectification module 1 exports and power for the converter module 3, the current-limiting resistance 22 with it is described super
Capacitance 21 connects to limit the electric current in branch.Super capacitor 21 stores the direct current from uncontrollable rectification module 1, and is
Converter module 3 is powered, and by a current-limiting resistance 22 of connecting, the size of electric current, member is burnt out to prevent electric current is excessive in limiting circuit
Device, while current-limiting resistance 22 can also play partial pressure.
Preferably, the converter module 3 includes inverter bridge 31 and IGBT drive module 32, and the inverter bridge 31 is by described in
The DC voltage inversion that energy-storage module 2 exports is alternating voltage, and the IGBT drive module 32 receives the Digital Signal Processing
The control instruction and the circuit of converter module 3 described in break-make that module 6 exports.IGBT drive module is set in converter module 3
32, fast response time and driving power is small has the advantages that energy saving and convenient to install and maintain.
Preferably, the signal sampling module 4 includes current sensor 41 (not shown), voltage sensor 42 (is not schemed
Show), filter amplification circuit 43 (not shown) and A/D conversion chips 44 (not shown), the current sensor 41 gathers described
The current signal that converter module 3 exports, the voltage sensor 42 gather voltage signal and the energy-storage module in power grid
2 output d. c. voltage signals, the current signal and voltage signal collected exported after the filter amplification circuit 43 to
The analog signal gathered in signal is converted into digital signal and by number by the A/D conversion chips 44, the A/D conversion chips 44
Word signal transmission gives the digital signal processing module 6.
Preferably, the LC filter modules 5 include filter unit 51, and the filter unit 51 includes 511 He of filter capacitor
Filter inductance 512.The voltage containing higher hamonic wave that LC filter modules 5 are used to export converter module 3 is filtered,
It is pure fundamental voltage to make output.
Preferably, the digital signal processing module 6 includes the DSP module 61 being connected with each other and FPGA module 62；
The DSP module 61 connects the signal sampling module 4 and the data of the signal sampling module 4 acquisition is carried out
Analysis is calculated to obtain real-time compensation data；
The FPGA module 62 connects the signal sampling module 4, the IGBT drive module 32 and the bypass respectively
Protection module 8, the FPGA module 62 receive the real-time compensation data that the DSP module 61 is transmitted and according to real-time compensation data
Control instruction is transmitted, the FPGA module 62 controls 4 gathered data of signal sampling module, and controls the IGBT drivings mould
The break-make of the break-make of block 32 and the bypass protection module 8.Digital signal processing module 6 in the utility model uses simultaneously
DSP module 61 and FPGA module 62 carry out data calculating, within the extremely short time using the data-handling capacity of DSP module 61
The analysis to network voltage detection and compensation is completed, the control of sampling and compensation electric current output is realized using FPGA module 62, into
And control the compensation of current transformer network voltage, extremely fast correction voltage, removal voltage dip, voltage swell, low-voltage and
Overvoltage, proof load continue even running and are not disrupted.In addition, by being monitored in real time to circuit, electricity is found in time
Road failure simultaneously controls 8 on-off circuit of bypass protection module with protective device using FPGA module 62.
Preferably, the series coupled transformer module 7 includes series transformer 71, and the series transformer 71 is by institute
It states the filtered voltage of LC filter modules and is coupled to power grid.By 6 analysis circuit power quality of digital signal processing module, and
Control output offset voltage, it is filtered after voltage power grid is coupled to by series transformer 71, to power grid carry out voltage benefit
It repays, so as to improve the quality of power grid electric energy, makes the operation more safety and stability of electrical equipment.
Certainly, the utility model can also have other numerous embodiments, based on present embodiment, the ordinary skill of this field
Personnel obtain other embodiment on the premise of any creative work is not made, and belong to the utility model and are protected
Scope.
Claims (9)
1. a kind of series voltage compensation device based on Power Electronic Technique, which is characterized in that described to be based on Power Electronic Technique
Series voltage compensation device include：
Uncontrollable rectification module connects power grid, the alternating current of power grid is made into direct current；
Energy-storage module receives and stores the direct current of the uncontrollable rectification module output；
Converter module receives the direct current of the energy-storage module output, and the DC inverter that the energy-storage module is exported
For alternating current；
Signal sampling module gathers the voltage signal in power grid, the d. c. voltage signal that the energy-storage module exports and the change
It flows the current signal of device module output and the analog-signal transitions in signal will be gathered as digital signal；
LC filter modules are filtered the voltage in the alternating current of converter module output；
Digital signal processing module receives the digital signal of the signal sampling module output, is obtained in real time by calculating analysis
Offset data, and control instruction is exported to the converter module and the LC filter modules；
Filtered alternating voltage is coupled to power grid by series coupled transformer module.
2. the series voltage compensation device according to claim 1 based on Power Electronic Technique, which is characterized in that the base
Bypass protection module is further included in the series voltage compensation device of Power Electronic Technique, the bypass protection module includes breaker
And bidirectional thyristor, the bypass protection module are connected with the series coupled transformer module, the bypass protection module is used
In unit protection and bypass changeover.
3. the series voltage compensation device according to claim 1 based on Power Electronic Technique, which is characterized in that it is described not
Controllable rectifier module includes diode, and the diode forms rectifier bridge, and the alternating current of power grid is made into direct current by the rectifier bridge
Electricity simultaneously charges to the energy-storage module.
4. the series voltage compensation device according to claim 1 based on Power Electronic Technique, which is characterized in that the storage
Energy module includes super capacitor and current-limiting resistance, and the direct current of the super capacitor storage uncontrollable rectification module output is simultaneously
It powers for the converter module, the current-limiting resistance connects to limit the electric current in branch with the super capacitor.
5. the series voltage compensation device according to claim 2 based on Power Electronic Technique, which is characterized in that the change
Flowing device module includes inverter bridge and IGBT drive module, and the DC voltage inversion that the energy-storage module exports is by the inverter bridge
Alternating voltage, the IGBT drive module receive the control instruction of the digital signal processing module output and unsteady flow described in break-make
The circuit of device module.
6. the series voltage compensation device according to claim 1 based on Power Electronic Technique, which is characterized in that the letter
Number sampling module includes current sensor, voltage sensor, filter amplification circuit and A/D conversion chips, the current sense
Device gathers the current signal of the converter module output, and the voltage sensor gathers voltage signal and the storage in power grid
The d. c. voltage signal of energy module output, the current signal and voltage signal collected export after the filter amplification circuit
To the A/D conversion chips, the analog signal gathered in signal is converted into digital signal and by number by the A/D conversion chips
Signal transmission gives the digital signal processing module.
7. the series voltage compensation device according to claim 1 based on Power Electronic Technique, which is characterized in that the LC
Filter module includes filter unit, and the filter unit includes filter capacitor and filter inductance.
8. the series voltage compensation device according to claim 5 based on Power Electronic Technique, which is characterized in that the number
Word signal processing module includes the DSP module and FPGA module that are connected with each other；
The DSP module connects the signal sampling module and carries out calculating analysis to the data of signal sampling module acquisition
To obtain real-time compensation data；
The FPGA module connects the signal sampling module, the IGBT drive module and the bypass protection module respectively,
The FPGA module receives the real-time compensation data of the DSP module transmission and is instructed according to real-time compensation Data Transmission Controlling,
The FPGA module controls the signal sampling modules acquiring data and controls the break-make of the IGBT drive module and described
The break-make of bypass protection module.
9. the series voltage compensation device according to claim 1 based on Power Electronic Technique, which is characterized in that the string
Joining coupling transformer module includes series transformer, and the series transformer couples the filtered voltage of the LC filter modules
To power grid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721318462.3U CN207398834U (en) | 2017-10-12 | 2017-10-12 | A kind of series voltage compensation device based on Power Electronic Technique |
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| CN201721318462.3U CN207398834U (en) | 2017-10-12 | 2017-10-12 | A kind of series voltage compensation device based on Power Electronic Technique |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110391664A (en) * | 2019-04-30 | 2019-10-29 | 江苏谷峰电力科技股份有限公司 | Suitable for remote 10kV distribution end low-voltage controlling device and method |
| CN110932284A (en) * | 2019-12-19 | 2020-03-27 | 济南拉斐叶电力科技有限公司 | Power electronic compensation transformer substation |
| CN111952984A (en) * | 2020-08-24 | 2020-11-17 | 西安许继电力电子技术有限公司 | Non-access type alternating voltage compensation circuit and system |
| CN112103954A (en) * | 2020-09-11 | 2020-12-18 | 西安交通大学 | Non-impact switching system, device and method for voltage compensation converter of hybrid distribution transformer |
| CN112653162A (en) * | 2020-12-17 | 2021-04-13 | 广东电网有限责任公司广州供电局 | Voltage sag compensation apparatus and method |
| CN112769154A (en) * | 2020-12-30 | 2021-05-07 | 科华恒盛股份有限公司 | Compensation control method and device of energy storage converter and terminal equipment |
| CN118137511A (en) * | 2024-01-18 | 2024-06-04 | 吉林市瑞来科技发展有限公司 | Output voltage regulating and controlling device based on compensation control |
-
2017
- 2017-10-12 CN CN201721318462.3U patent/CN207398834U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110391664A (en) * | 2019-04-30 | 2019-10-29 | 江苏谷峰电力科技股份有限公司 | Suitable for remote 10kV distribution end low-voltage controlling device and method |
| CN110391664B (en) * | 2019-04-30 | 2021-10-08 | 江苏谷峰电力科技股份有限公司 | Low-voltage treatment device and method suitable for long-distance 10kV distribution network tail end |
| CN110932284A (en) * | 2019-12-19 | 2020-03-27 | 济南拉斐叶电力科技有限公司 | Power electronic compensation transformer substation |
| CN111952984A (en) * | 2020-08-24 | 2020-11-17 | 西安许继电力电子技术有限公司 | Non-access type alternating voltage compensation circuit and system |
| CN112103954A (en) * | 2020-09-11 | 2020-12-18 | 西安交通大学 | Non-impact switching system, device and method for voltage compensation converter of hybrid distribution transformer |
| CN112103954B (en) * | 2020-09-11 | 2022-07-12 | 西安交通大学 | Non-impact switching system, device and method for voltage compensation converter of hybrid distribution transformer |
| CN112653162A (en) * | 2020-12-17 | 2021-04-13 | 广东电网有限责任公司广州供电局 | Voltage sag compensation apparatus and method |
| CN112769154A (en) * | 2020-12-30 | 2021-05-07 | 科华恒盛股份有限公司 | Compensation control method and device of energy storage converter and terminal equipment |
| CN118137511A (en) * | 2024-01-18 | 2024-06-04 | 吉林市瑞来科技发展有限公司 | Output voltage regulating and controlling device based on compensation control |
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