CN111697698A - Compensation power ride-through type voltage transient variation generating device based on autotransformer - Google Patents
Compensation power ride-through type voltage transient variation generating device based on autotransformer Download PDFInfo
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- CN111697698A CN111697698A CN202010527449.9A CN202010527449A CN111697698A CN 111697698 A CN111697698 A CN 111697698A CN 202010527449 A CN202010527449 A CN 202010527449A CN 111697698 A CN111697698 A CN 111697698A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
Abstract
The invention discloses a compensation power ride-through voltage transient variation generating device based on an autotransformer, which comprises: the system comprises a signal acquisition module, a main processor electrically connected with the signal acquisition module, a control module electrically connected with the main processor, a protection module electrically connected with the main processor, and a remote human-computer interaction module electrically connected with the main processor. The compensation power ride-through voltage transient change generating device based on the autotransformer reduces operation loss and heat productivity, reduces weight and volume, and avoids voltage interruption in the gear shifting process.
Description
Technical Field
The invention relates to the technical field of power devices, in particular to a compensation power ride-through voltage transient variation generating device based on an autotransformer.
Background
At present, the voltage transient variation generating device has four types, namely, based on an amplifier, or based on switch impedance, or based on an inverter, or based on an auto-coupling voltage regulator; the voltage transient change generating device based on the amplifier is mainly realized by a power device working in a linear amplification area, has the characteristics of richer waveform and good dynamic characteristic, but has the problems of high manufacturing cost, high power consumption and low power; the voltage transient variation generating device based on the switch impedance form is simple in structure and control and convenient to realize, but is large in energy loss and incapable of realizing bidirectional flow of energy; the voltage sag generator based on the inverter can simulate various voltage faults, such as voltage sag, voltage rise, harmonic waves and three-phase asymmetric operation, but the rapidity of the voltage sag is influenced because the output needs capacitance filtering; the full-power ride-through voltage transient generation device based on the autotransformer has the characteristics of general response speed, high efficiency, bidirectional energy flow and the like, can realize voltage transient drop, voltage transient rise and output of irregular waveforms at any time, but has large loss and voltage interruption caused by abnormal gear switching; the full-power ride-through voltage transient change generation device based on the autotransformer has high cost performance, so the device is widely applied at present.
As shown in fig. 2, when the conventional full-power ride-through voltage transient generator based on an autotransformer works for compensation, all power is required to pass through the autotransformer, which results in large loss, serious heat generation and large volume and weight of the generator, meanwhile, the coma control strategy is not good during gear shifting, which is easy to cause voltage interruption, and if a gear switch is not properly selected, the corresponding speed is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a compensation power ride-through voltage transient change generating device based on an autotransformer, which reduces the running loss and heat productivity, reduces the weight and volume and avoids the voltage interruption in the gear shifting process.
In order to solve the above problems, the present invention provides an autotransformer-based compensated power ride-through voltage sag generator, comprising: the system comprises a signal acquisition module, a main processor electrically connected with the signal acquisition module, a control module electrically connected with the main processor, a protection module electrically connected with the main processor and a remote human-computer interaction module electrically connected with the main processor; wherein the content of the first and second substances,
the signal acquisition module is used for acquiring a line voltage signal and a line current signal;
the remote human-computer interaction module is used for inputting data and displaying a result;
the main processor is used for analyzing the line voltage signal and the current signal acquired by the signal acquisition module in real time; or the remote man-machine interaction module is used for receiving the data input by the remote man-machine interaction module and the displayed result; or for sending a control signal to the control module; or for sending a protection signal to the protection module;
the control module is used for receiving the control signal and generating a trigger pulse;
the protection module is used for receiving the protection signal and generating a protection pulse.
In an optional embodiment, the signal acquisition module includes a voltage transformer, a current transformer and an AD sampling chip; wherein the content of the first and second substances,
the voltage transformer is used for converting a voltage signal into a proper voltage signal and sending the proper voltage signal to the AD sampling chip;
the current transformer is used for converting a current signal into a proper current signal and sending the proper current signal to the AD sampling chip;
the AD sampling chip is used for receiving the proper voltage signal and the proper current signal and sampling the proper voltage signal and the proper current signal.
In an alternative embodiment, the AD sampling chip is an Analog AD7934-6 chip.
In an alternative embodiment, the main processor is a microprocessor STM32F373VCT6 based on the CORTEX-M4 kernel.
In an optional embodiment, the control module comprises a switching unit; the switching unit is used for receiving the trigger pulse and performing opening or closing according to the trigger pulse.
In an optional embodiment, the switching unit comprises a plurality of power electronic switches; the power electronic switch is a ST triac BTA 16-400.
In an alternative embodiment, the protection module comprises a mechanical bypass unit, a fast bypass unit; the mechanical bypass unit is used for receiving the protection pulse and opening or closing according to the protection pulse; the rapid bypass unit is used for receiving the protection pulse and opening or closing according to the protection pulse.
In an optional implementation manner, the remote human-computer interaction module comprises a keyboard and a liquid crystal display screen; the keyboard is used for inputting data, including increasing numerical values, decreasing numerical values, determining functions and canceling directions; and the liquid crystal display screen is used for displaying results including the current running state and parameters.
In the implementation of the invention, the running loss of the compensation power ride-through voltage transient variation generating device based on the autotransformer is greatly reduced, the response speed of the control module is high, the charging resistor is set and started through the remote human-computer interaction module, the voltage interruption in the gear shifting process is avoided, and the problems of serious heating, large volume, heavy weight and low response speed of the conventional full-power ride-through voltage transient variation generating device based on the autotransformer are solved; in addition, the compensation power ride-through voltage transient variation generating device based on the autotransformer can be conducted and operated for a long time, meanwhile, the protection module perfects a protection strategy, the device can be quickly bypassed due to abnormal operation, the device is effectively protected, the current complex test environment requirements of an electric power system are met, and the device has strong applicability and flexibility.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural composition diagram of a compensation power ride-through voltage sag generator based on an autotransformer according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a present autotransformer-based compensated power ride-through voltage sag generator in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of a specific circuit structure of the compensated power-ride-through voltage sag generator based on the autotransformer according to the embodiment of the present invention;
FIG. 4 is a detailed circuit diagram of a control module of an embodiment of the present invention;
fig. 5 is a specific circuit diagram of the protection module according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1, fig. 1 is a schematic structural diagram of a compensation power pass-through voltage sag generator based on an autotransformer according to an embodiment of the present invention.
As shown in fig. 1, an autotransformer-based compensated power-ride through voltage sag generator apparatus, comprising: the system comprises a signal acquisition module 1, a main processor 2 electrically connected with the signal acquisition module 1, a control module 4 electrically connected with the main processor 2, a protection module 3 electrically connected with the main processor 2, and a remote human-computer interaction module 5 electrically connected with the main processor 2; wherein the content of the first and second substances,
the signal acquisition module 1 is used for acquiring line voltage signals and current signals; the remote human-computer interaction module 5 is used for inputting data and displaying results; the main processor 2 is used for analyzing the line voltage signal and the current signal acquired by the signal acquisition module 1 in real time; or for receiving data input by the remote human-computer interaction module 5 and displayed results; or for sending control signals to the control module 4; or for sending a protection signal to the protection module 3; the control module 4 is used for receiving the control signal and generating a trigger pulse; the protection module 3 is configured to receive the protection signal and generate a protection pulse.
In the specific implementation process of the invention, the signal acquisition module 1 comprises a voltage transformer, a current transformer and an AD sampling chip; the voltage transformer is used for converting a voltage signal into a proper voltage signal and sending the proper voltage signal to the AD sampling chip; the current transformer is used for converting a current signal into a proper current signal and sending the proper current signal to the AD sampling chip; the AD sampling chip is used for receiving the proper voltage signal and the proper current signal and sampling the proper voltage signal and the proper current signal. The AD sampling chip is an Analog AD7934-6 chip, the Analog AD7934-6 chip is a 12-bit high-speed low-power-consumption successive approximation type Analog-to-digital converter, a single power supply of 2.7V to 5.25V is adopted for supplying power, the highest throughput reaches 625kSPS, a low-noise wide-bandwidth differential sampling and holding amplifier is arranged in the AD sampling chip, and the input frequency of 50MHz can be processed.
Specifically, as shown in fig. 3, the signal acquisition module 1 includes a first voltage transformer TV1, a first current transformer TA1, a second voltage transformer TV2, and a second current transformer TA 2; the first voltage transformer TV1 and the first current transformer TA1 are disposed at the input, and the second voltage transformer TV2 and the second current transformer TA2 are disposed at the output.
In the implementation process of the invention, the main processor 2 is a microprocessor STM32F373VCT6 based on CORTEX-M4 kernel. Specifically, the microprocessor STM32F373VCT6 based on the CORTEX-M4 kernel has 2I 2C, 2 SPI, 3 USART, 1 way CAN, 3 16-bit SigmaDelta ADC converters, 1 12-bit ADC converter, 3 12-bit DAC converters, and has 32KBSRAM and 256KBFLASH inside, and supports JTAG debugging.
In the specific implementation process of the present invention, the control module 4 includes a switching unit; the switching unit is used for receiving the trigger pulse and performing opening or closing according to the trigger pulse; the switching unit comprises a plurality of power electronic switches; the power electronic switch is a ST triac BTA16-400 that passes 16A current when normally conducting.
Specifically, as shown in fig. 3, the switching unit includes a power electronic switch S1, a power electronic switch S2, a power electronic switch S3, a power electronic switch S4, a power electronic switch Sn, a power electronic switch K1, a power electronic switch K2, a power electronic switch K3, a power electronic switch K4, and a power electronic switch Kn; the power electronic switch S1 and the power electronic switch K1 are connected in parallel to one side of the autotransformer T, the power electronic switch S2 and the power electronic switch K2 are connected in parallel to the same side of the autotransformer T, the power electronic switch S3 and the power electronic switch K3 are connected in parallel to the same side of the autotransformer T, and the power electronic switch Sn and the power electronic switch Kn are connected in parallel to the same side of the autotransformer T.
In addition, the control module is also used for driving the switching unit; as shown in fig. 4, the control module drives the silicon controlled rectifier by using the optocoupler MOC3081, transmits an electrical signal by using light as a medium, and when the input end is powered up with an electrical signal, the light emitter emits light, and the light receiver generates photocurrent after receiving the light and flows out from the output end, thereby realizing 'electro-optic-electro' conversion; the photoelectric coupler using light as medium to couple the input signal to the output has the advantages of small size, long service life, no contact, high anti-interference capacity, insulation between output and input and unidirectional signal transmission.
In the specific implementation process of the present invention, the protection module 3 includes a mechanical bypass unit and a fast bypass unit; the mechanical bypass unit is used for receiving the protection pulse and opening or closing according to the protection pulse; the rapid bypass unit is used for receiving the protection pulse and opening or closing according to the protection pulse.
Specifically, as shown in fig. 3, the protection module includes a mechanical bypass unit JS and a fast bypass unit KS; and the mechanical bypass unit JS and the quick bypass unit KS are connected in parallel to the other side of the autotransformer T.
In addition, the protection module is also used for driving the mechanical bypass unit or the quick bypass unit; as shown in fig. 4 and 5, the protection module has a triac drive and a relay drive, wherein the triac drive uses the same optocoupler MOC3081 circuit as the control module, and the relay drive uses a transistor 8050.
In the specific implementation process of the invention, the remote human-computer interaction module 5 comprises a keyboard and a liquid crystal display screen; the keyboard is used for inputting data, including increasing numerical values, decreasing numerical values, determining functions and canceling directions; and the liquid crystal display screen is used for displaying results including the current running state and parameters.
Specifically, the keyboard design uses 4 keys for increasing numerical values, reducing numerical values, determining functions and canceling directions; in order to intuitively display a positioning detection result, the system comprises an LCD with a resolution of 320X240, various parameters and a current running state are conveniently displayed, the working power supply of the LCD is 2.4-3.3V, backlight is controllable and effective in low level, the data width is 16 bits, the reset operation adopts low level, the size is 3.2 inches, and an ILI9320 chip is used for driving.
In the implementation of the invention, the running loss of the compensation power ride-through voltage transient variation generating device based on the autotransformer is greatly reduced, the response speed of the control module is high, the charging resistor is set and started through the remote human-computer interaction module, the voltage interruption in the gear shifting process is avoided, and the problems of serious heating, large volume, heavy weight and low response speed of the conventional full-power ride-through voltage transient variation generating device based on the autotransformer are solved; in addition, the compensation power ride-through voltage transient variation generating device based on the autotransformer can be conducted and operated for a long time, meanwhile, the protection module perfects a protection strategy, the device can be quickly bypassed due to abnormal operation, the device is effectively protected, the current complex test environment requirements of an electric power system are met, and the device has strong applicability and flexibility.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic or optical disk, or the like.
The compensation power ride-through voltage sag generator based on the autotransformer provided by the embodiment of the invention is described in detail above, a specific example is adopted in the text to explain the principle and the implementation mode of the invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (8)
1. An autotransformer-based compensated power ride-through voltage sag generator, the generator comprising: the system comprises a signal acquisition module, a main processor electrically connected with the signal acquisition module, a control module electrically connected with the main processor, a protection module electrically connected with the main processor and a remote human-computer interaction module electrically connected with the main processor; wherein the content of the first and second substances,
the signal acquisition module is used for acquiring a line voltage signal and a line current signal;
the remote human-computer interaction module is used for inputting data and displaying a result;
the main processor is used for analyzing the line voltage signal and the current signal acquired by the signal acquisition module in real time; or the remote man-machine interaction module is used for receiving the data input by the remote man-machine interaction module and the displayed result; or for sending a control signal to the control module; or for sending a protection signal to the protection module;
the control module is used for receiving the control signal and generating a trigger pulse;
the protection module is used for receiving the protection signal and generating a protection pulse.
2. The autotransformer-based compensated power ride-through voltage sag generator device according to claim 1, wherein the signal acquisition module comprises a voltage transformer, a current transformer and an AD sampling chip; wherein the content of the first and second substances,
the voltage transformer is used for converting a voltage signal into a proper voltage signal and sending the proper voltage signal to the AD sampling chip;
the current transformer is used for converting a current signal into a proper current signal and sending the proper current signal to the AD sampling chip;
the AD sampling chip is used for receiving the proper voltage signal and the proper current signal and sampling the proper voltage signal and the proper current signal.
3. The autotransformer-based compensated power-ride-through voltage sag generator device according to claim 2, wherein the AD sampling chip is an Analog AD7934-6 chip.
4. The autotransformer-based compensated power-ride through voltage sag generator of claim 1, wherein the main processor is a microprocessor based CORTEX-M4 core STM32F373VCT 6.
5. The autotransformer-based compensated power ride-through voltage sag generator device of claim 1, wherein the control module comprises a switching unit; the switching unit is used for receiving the trigger pulse and performing opening or closing according to the trigger pulse.
6. The autotransformer-based compensated power-ride-through voltage sag generator device of claim 5, wherein the switching unit comprises a plurality of power electronic switches; the power electronic switch is a ST triac BTA 16-400.
7. The autotransformer-based compensated power ride-through voltage sag generator according to claim 1, wherein the protection module comprises a mechanical bypass unit, a fast bypass unit; the mechanical bypass unit is used for receiving the protection pulse and opening or closing according to the protection pulse; the rapid bypass unit is used for receiving the protection pulse and opening or closing according to the protection pulse.
8. The autotransformer-based compensated power ride-through voltage sag generator device according to claim 1, wherein the remote human-computer interaction module comprises a keyboard and a liquid crystal display; the keyboard is used for inputting data, including increasing numerical values, decreasing numerical values, determining functions and canceling directions; and the liquid crystal display screen is used for displaying results including the current running state and parameters.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112505396A (en) * | 2020-11-02 | 2021-03-16 | 广西电网有限责任公司电力科学研究院 | Communication method and system for realizing wall-mounted single-phase passive series voltage stabilization |
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| CN109412166A (en) * | 2018-11-13 | 2019-03-01 | 国网江苏省电力有限公司镇江供电分公司 | Dynamic voltage recovery system based on double-bus crossfeed |
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Application publication date: 20200922 |