CN219957694U - Voltage sag process simulator - Google Patents
Voltage sag process simulator Download PDFInfo
- Publication number
- CN219957694U CN219957694U CN202321094780.1U CN202321094780U CN219957694U CN 219957694 U CN219957694 U CN 219957694U CN 202321094780 U CN202321094780 U CN 202321094780U CN 219957694 U CN219957694 U CN 219957694U
- Authority
- CN
- China
- Prior art keywords
- unit
- voltage
- power
- signal
- process simulator
- 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
- 238000000034 method Methods 0.000 title claims abstract description 56
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 32
- 230000003321 amplification Effects 0.000 claims abstract description 18
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 18
- 238000005070 sampling Methods 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000003381 stabilizer Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000004088 simulation Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000004422 calculation algorithm Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model provides a voltage sag process simulator, which comprises: the power supply unit, the control unit, the signal generation unit and the power amplification unit; the power supply unit is respectively connected with the control unit and the signal generation unit; the signal generating unit is respectively connected with the input electrodes of the control unit and the power amplifying unit; the power amplifying unit outputs the amplified voltage signal and the amplified current signal. The voltage sag process simulator is used for outputting high-voltage signals and large-current signals, amplifying power and further completing simulation of the voltage sag process.
Description
Technical Field
The utility model relates to the technical field of power electronics, in particular to a voltage sag process simulator.
Background
Along with the continuous improvement of the degree of automatic electrification of various industries in society, the electric energy quality has become an important index for measuring the development of the electric power industry, and among a plurality of electric energy quality problems, the voltage sag problem accounts for more than ninety percent, and the high-cost economic loss is easily caused due to the high randomness and the high treatment difficulty, so that the voltage sag process needs to be accurately simulated for testing the effects of a plurality of voltage sag compensation devices.
At present, the control circuit is used for controlling the on-off of an IGBT of an inverter so as to simulate the output voltage sag, and particularly the PI control is used for realizing the change of the output voltage along with a given value. However, the voltage sag phenomenon is usually caused by sudden problems such as large-capacity load starting, lightning strike, short-circuit fault and the like, and can be approximately regarded as a step change, so that the voltage sag process cannot be well simulated by sampling the output voltage and current of the inverter.
Disclosure of Invention
In view of this, the embodiment of the utility model provides a voltage sag process simulator, so as to solve the problem that the prior art cannot better simulate a voltage sag.
In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions:
an embodiment of the present utility model in a first aspect discloses a voltage sag process simulator, including: the power supply unit, the control unit, the signal generation unit and the power amplification unit;
the power supply unit is respectively connected with the control unit and the signal generation unit;
the signal generation unit is respectively connected with the control unit and the input electrode of the power amplification unit;
the power amplifying unit is used for amplifying the voltage signal and the current signal, wherein the signal generating unit is used for receiving the control signal sent by the control unit and the reference voltage sent by the power supply unit, generating a voltage signal based on the reference voltage and the control signal, and sending the voltage signal to the power amplifying unit so that the power amplifying unit outputs the amplified voltage signal and the amplified current signal.
Preferably, the power supply unit comprises a USB circuit unit, a linear voltage stabilizer, an isolated power supply unit and a reference voltage unit;
the USB circuit unit is connected with an external USB power supply;
the linear voltage stabilizer is connected with the control unit;
the isolated power supply unit and the reference voltage unit are respectively connected with the signal generation unit.
Preferably, the signal generating unit includes a DAC unit and a multiplier;
the DAC unit is connected with the control unit, and is used for receiving a control signal sent by the control unit and sending a sine wave to the multiplier according to the control signal;
the multiplier is respectively connected with the input poles of the control unit and the power amplification unit, wherein the multiplier is used for receiving the chip selection signal sent by the control unit and outputting a voltage signal to the power amplification unit based on the chip selection signal and the sine wave.
Preferably, the power amplifying unit comprises a rectifier bridge circuit and a power amplifying circuit;
one end of the rectifier bridge circuit is connected with an external alternating current power supply, and the other end of the rectifier bridge circuit is connected with the power amplifying circuit.
Preferably, the power amplifying circuit includes a high power operational amplifier and a low power operational amplifier.
Preferably, the voltage sag process simulator further comprises: sampling a resistor;
the sampling resistor is connected with the output electrode of the power amplifying unit, wherein the sampling resistor is used for sampling the voltage signal output by the power amplifying unit, obtaining a sampling result and sending the sampling result to the low-power operational amplifier so that the low-power operational amplifier calibrates the sampling result.
Preferably, the control unit comprises an MCU and peripheral circuits;
the MCU is connected with the computer through the SWD interface, wherein the MCU is used for receiving a control command sent by the computer.
Preferably, the core of the MCU is ARMCortex TM -M4。
Preferably, the MCU includes a timer;
the timer is used for adjusting the transmission frequency of the control signal.
Preferably, the peripheral circuit includes a high-speed oscillator, a low-speed oscillator, and a decoder.
Based on the above-mentioned voltage sag process simulator provided by the embodiment of the utility model, the voltage sag process simulator includes: the power supply unit, the control unit, the signal generation unit and the power amplification unit; the power supply unit is respectively connected with the control unit and the signal generation unit; the signal generating unit is respectively connected with the input electrodes of the control unit and the power amplifying unit; the power amplifying unit outputs the amplified voltage signal and the amplified current signal. The voltage sag process simulator is used for outputting high-voltage signals and large-current signals, amplifying power and further completing simulation of the voltage sag process.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a first block diagram of a voltage sag process simulator according to an embodiment of the present utility model;
FIG. 2 is a second block diagram of a voltage sag process simulator according to an embodiment of the present utility model;
FIG. 3 is a hardware block diagram of a DAC unit and a four-quadrant multiplier DAC unit provided by an embodiment of the present utility model;
FIG. 4 is a third block diagram of a voltage sag process simulator according to an embodiment of the present utility model;
fig. 5 is a fourth block diagram of a voltage sag process simulator according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the present disclosure, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
As known from the background art, the power sag refers to a phenomenon that the effective value of the power frequency voltage at a certain point in a power system is temporarily reduced to 10% -90% of the rated voltage (i.e., the amplitude is 0.1-0.9 (p.u.), and the power sag lasts for 10 ms-1 min, and the system frequency is still the nominal value in the period, and then returns to the normal level. The voltage sag simulation device in the current stage rectifies, filters and inverts the power grid voltage in a back-to-back mode through a full-bridge circuit, and changes the phase difference of a phase-shifting bridge arm to a reference arm so as to change the output root mean square value of an inverter and further realize the simulation of the output voltage sag.
Accordingly, an embodiment of the present utility model provides a voltage sag process simulator, comprising: the power supply unit, the control unit, the signal generation unit and the power amplification unit; the power supply unit is respectively connected with the control unit and the signal generation unit; the signal generating unit is respectively connected with the input electrodes of the control unit and the power amplifying unit; the power amplifying unit outputs the amplified voltage signal and the amplified current signal. The voltage sag process simulator is used for outputting high-voltage signals and large-current signals, amplifying power and further completing simulation of the voltage sag process.
Referring to fig. 1, a first block diagram of a voltage sag process simulator according to an embodiment of the utility model is shown, where the voltage sag process simulator includes: a power supply unit 101, a control unit 102, a signal generation unit 103, and a power amplification unit 104.
Specifically, the power supply unit 101 is connected to the control unit 102 and the signal generation unit 103, respectively; the signal generation unit 103 is connected to the input terminals of the control unit 102 and the power amplification unit 104, respectively.
The power supply unit 101 is used for supplying power to the control unit 102 and the signal generation unit 103, and transmitting a reference voltage to the signal generation unit 103.
It will be appreciated that the purpose of the power supply unit 101 sending the reference voltage to the signal generation unit 103 is to cause the signal generation unit 103 to generate a voltage signal with reference to the reference voltage.
The control unit 102 is configured to send a control signal to the signal generation unit 103.
Specifically, control section 102 is connected to a computer, receives a control command transmitted from the computer, and transmits a control signal to signal generation section 103 based on the control command.
The signal generation unit 103 is configured to receive the reference voltage transmitted by the power supply unit 101 and the control signal transmitted by the control unit 102, generate a voltage signal based on the reference voltage and the control signal, and transmit the voltage signal to the power amplification unit.
The power amplifying unit 104 is configured to receive the voltage signal sent by the signal generating unit 103, and output an amplified voltage signal and an amplified current signal based on the voltage signal, so as to amplify power and implement voltage sag simulation.
In the embodiment of the utility model, the voltage sag process simulator comprises a power supply unit, a control unit, a signal generation unit and a power amplification unit, and the amplified high-voltage signal and high-current signal are accurately output based on the four units, so that the voltage sag process is simulated by amplifying power.
In a specific embodiment, referring to fig. 2 in conjunction with fig. 1, a second block diagram of a voltage sag process simulator according to an embodiment of the present utility model is shown.
It should be noted that, in the embodiment of the present utility model, the multiplier includes a four-quadrant multiplier DAC, and the embodiment of the present utility model is described with respect to the four-quadrant multiplier DAC.
Specifically, the power supply unit 101 includes a USB circuit unit 1011, a linear regulator 1012, an isolated power supply unit 1013, and a reference voltage unit 1014; the control unit 102 includes an MCU1021 and a peripheral circuit 1022; the signal generation unit 103 includes a DAC unit 1031 and a four-quadrant multiplier DAC unit 1032.
The USB circuit unit 1011 in the power supply unit 101 is connected to an external USB power supply, and supplies power to other units; the linear voltage stabilizer 1012 is connected with the control unit 102; the isolated power supply unit 1013 and the reference voltage unit 1014 are connected to the signal generation unit 103, respectively; the power amplifying unit 104 is connected to an external ac power supply.
Specifically, the linear voltage regulator 1012 (e.g., AP1117-3.3 linear voltage regulator) is configured to convert the 5V voltage input by the USB circuit unit 1011 into 3.3V voltage, and supply power to the MCU1021 in the control unit 102; a linear regulator (e.g., an AP1117-5 linear regulator) is used to output a 5V voltage to power DAC cell 1031 and four-quadrant multiplier DAC cell 1032. The isolation power unit 1013 includes a DC-DC isolation power supply (e.g., 0509SDC-DC isolation power supply) for converting the 5V voltage input by the USB circuit unit 1011 into positive and negative 9V voltage, and supplying power to the operational amplifier in the peripheral circuit 1022, so that the mutual interference between the digital circuit and the analog circuit can be effectively prevented. The reference voltage unit 1014 (e.g., REF192 reference voltage chip) is configured to convert the 5V voltage input from the USB circuit unit 1011 into a 2.5V high-precision reference voltage, and provide a voltage reference for the DAC unit 1031.
It will be appreciated that the DAC is a digital to analog converter for converting a digital signal to an analog signal (e.g. in the form of a current, voltage or charge). The four-limit multiplier is an analog multiplier, two input signals of the four-limit multiplier are bipolar, the reference voltage input can be positive or negative, and the output can be positive or negative.
Specifically, the DAC unit 1031 in the signal generation unit 103 includes a DAC (eight channels, voltage output 12 bits) and an operational amplifier for outputting a bipolar sine wave; wherein the DAC may be AD5328; the operational amplifier comprises a low-pass filter circuit, so that the digital-to-analog conversion circuit can be effectively prevented from generating output errors due to interference. The four-quadrant multiplier DAC unit 1032 in the signal generation unit 103 includes a 14-bit high-bandwidth serial interface multiplying DAC (e.g., AD 5453); wherein each multiplier may select a corresponding channel according to a chip select signal transmitted from the control unit 102 to output a corresponding voltage signal.
It should be noted that, the peripheral circuit 1022 in the control unit 102 includes a high-speed oscillator (such as an 8MHz external high-speed oscillator), a low-speed oscillator (such as a 32.768KHz external low-speed oscillator), and a decoder (such as a 74HC138 decoder), where the high-speed oscillator is used as a clock for the MCU internal core to operate; the low-speed oscillator is used as a clock of the PTC and is used for providing a clock for the calendar peripheral; the decoder is used to expand the IO number. The core of the MCU1021 in the control unit 102 is ARMCortex TM M4, for example MCU model HC32f 460; the MCU1021 is connected to a computer through a SWD interface, for receiving control commands transmitted from the computer, and transmitting control signals to the signal generation unit 103 through a USB interface.
In a specific implementation process, the control unit 102 is configured to implement an algorithm for generating a sine waveform, after parameters are input to the control unit 102 through a computer, the control unit 102 obtains a sine wave array through internal calculation, and the sine wave array is input to the DAC unit 1031 through an SPI interface, so that the DAC unit 1031 outputs six paths of sine waves with high precision and controllable frequency, and simulates and outputs three-phase voltage signals and three-phase current signals, thereby achieving the effect of simulating voltage and current output conditions under different load conditions and different power factors.
The following briefly describes the operation of the MCU1021 in the control unit 102:
in some specific embodiments, the MCU1021 creates a task, runs a debug command line, initializes a timer and a digital-to-analog conversion chip when receiving a control command sent by a computer through the SWD interface, generates a sine wave array by looking up a sine wave table, inputs the sine wave array to the DAC unit 1031 through the SPI interface, and changes the output frequency of the sine wave based on a timer period reference value (for example, 20000 points are output within 20 ms).
The timer period reference value may be determined according to the high-speed oscillator and the low-speed oscillator in the peripheral circuit 1022.
Referring to the hardware configuration of the DAC cell and four-quadrant multiplier DAC cell shown in fig. 3, DAC cell 1031 outputs each of the sinusoidal voltage signal and sinusoidal current signal to four-quadrant multiplier DAC cell 1032. The control unit 102 inputs voltage amplitude values (for example, voltage amplitude values with resolution of 1/16384) to the four-quadrant multiplier DAC unit 1032 through the SPI interface, and controls the voltage signals output by the four-quadrant multiplier DAC unit 1032, so as to achieve the effect of accurately simulating the voltage sag process under various conditions.
In the embodiment of the utility model, the control unit controls the DAC unit to achieve the output of 12 bits of resolution and the voltage update speed of 8 mu s through the SPI interface. Meanwhile, the four-quadrant multiplier DAC unit is controlled through the SPI interface, and multiplier control with 14-bit resolution and voltage adjustment rate of 2.7MSPS are achieved. And the precise control of the frequency and the phase of the output sine wave is realized according to the periodic reference value of the timer.
In a specific embodiment, referring to fig. 2 in combination with fig. 4, a third block diagram of a voltage sag process simulator according to an embodiment of the utility model is shown, and the power amplifying unit 104 includes a rectifier bridge circuit 1041 and a power amplifying circuit 1042.
The rectifier bridge circuit 1041 in the power amplifying unit 104 has one end connected to an external ac power source and the other end connected to the power amplifying circuit 1042. The power amplifying circuit 1042 includes a high-power operational amplifier (e.g., TDA 7294) and a low-power operational amplifier.
In a specific implementation process, the rectifier bridge circuit 1041 is configured to input positive and negative 30V voltage to the high-power operational amplifier, convert the 30V voltage to positive and negative 15V voltage based on a power supply voltage stabilizing chip (such as LM7815 and LM 7915), and input the positive and negative 15V voltage to the low-power operational amplifier.
The low-power operational amplifier is connected to the front electrode of the high-power operational amplifier, and is configured to receive the voltage signal and input the voltage signal to the high-power operational amplifier to realize power amplification, that is, amplify the voltage signal by using a transformer, for example, using 12: the 220 transformer amplifies the voltage signal into a 220V or 380V voltage signal; and outputs a large current with a transformer, for example, a 2:1 transformer.
In some specific embodiments, referring to fig. 5, a fourth block diagram of a voltage sag process simulator provided by the embodiment of the utility model is shown, and unlike fig. 4, the voltage sag process simulator further includes a sampling resistor 105, where the sampling resistor 105 is connected to an output pole of the power amplifying unit 104, and specifically, the sampling resistor 105 is used to sample a voltage signal output by the power amplifying unit 104, so as to obtain a sampling result, and the sampling result is sent to the low-power operational amplifier for calibration.
It may be understood that the calibration specifically includes comparing the sampling result with the reference voltage in the low-power operational amplifier, and if the comparison result indicates that the power amplifying unit 104 has an amplifying error, the power amplifying unit 104 adjusts according to the comparison result.
In the embodiment of the utility model, the rectifier bridge circuit is utilized to supply power to the power amplifying unit, and the received voltage signal is amplified based on the power amplifying circuit to output high voltage and high current. Meanwhile, the output of the power amplifying unit is calibrated in time by utilizing the sampling resistor, so that the accuracy of the voltage sag process simulator is increased.
In summary, the present utility model provides a voltage sag process simulator, including: the power supply unit, the control unit, the signal generation unit and the power amplification unit; the power supply unit is respectively connected with the control unit and the signal generation unit; the signal generating unit is respectively connected with the input electrodes of the control unit and the power amplifying unit; the power amplifying unit outputs the amplified voltage signal and the amplified current signal. The voltage sag process simulator is used for outputting high-voltage signals and large-current signals, amplifying power and further completing simulation of the voltage sag process.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for a system or system embodiment, since it is substantially similar to a method embodiment, the description is relatively simple, with reference to the description of the method embodiment being made in part. The systems and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present utility model without undue burden.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present utility model.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A voltage sag process simulator, the voltage sag process simulator comprising: the power supply unit, the control unit, the signal generation unit and the power amplification unit;
the power supply unit is respectively connected with the control unit and the signal generation unit;
the signal generation unit is respectively connected with the control unit and the input electrode of the power amplification unit;
the power amplifying unit is used for amplifying the voltage signal and the current signal, wherein the signal generating unit is used for receiving the control signal sent by the control unit and the reference voltage sent by the power supply unit, generating a voltage signal based on the reference voltage and the control signal, and sending the voltage signal to the power amplifying unit so that the power amplifying unit outputs the amplified voltage signal and the amplified current signal.
2. The voltage sag process simulator of claim 1, wherein the power supply unit comprises a USB circuit unit, a linear regulator, an isolated power supply unit, and a reference voltage unit;
the USB circuit unit is connected with an external USB power supply;
the linear voltage stabilizer is connected with the control unit;
the isolated power supply unit and the reference voltage unit are respectively connected with the signal generation unit.
3. The voltage sag process simulator according to claim 1, wherein the signal generating unit comprises a DAC unit and a multiplier;
the DAC unit is connected with the control unit, and is used for receiving a control signal sent by the control unit and sending a sine wave to the multiplier according to the control signal;
the multiplier is respectively connected with the input poles of the control unit and the power amplification unit, wherein the multiplier is used for receiving the chip selection signal sent by the control unit and outputting a voltage signal to the power amplification unit based on the chip selection signal and the sine wave.
4. The voltage sag process simulator of claim 1, wherein the power amplifying unit comprises a rectifier bridge circuit and a power amplifying circuit;
one end of the rectifier bridge circuit is connected with an external alternating current power supply, and the other end of the rectifier bridge circuit is connected with the power amplifying circuit.
5. The voltage sag process simulator of claim 4, wherein the power amplification circuit comprises a high power operational amplifier and a low power operational amplifier.
6. The voltage sag process simulator of claim 5, further comprising: sampling a resistor;
the sampling resistor is connected with the output electrode of the power amplifying unit, wherein the sampling resistor is used for sampling the voltage signal output by the power amplifying unit, obtaining a sampling result and sending the sampling result to the low-power operational amplifier so that the low-power operational amplifier calibrates the sampling result.
7. The voltage sag process simulator of claim 1, wherein the control unit comprises an MCU and peripheral circuitry;
the MCU is connected with the computer through the SWD interface, wherein the MCU is used for receiving a control command sent by the computer.
8. The voltage sag process simulator of claim 7, wherein the core of the MCU is armcotex TM -M4。
9. The voltage sag process simulator of claim 7, wherein the MCU includes a timer;
the timer is used for adjusting the transmission frequency of the control signal.
10. The voltage sag process simulator of claim 7, wherein the peripheral circuit comprises a high-speed oscillator, a low-speed oscillator, and a decoder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321094780.1U CN219957694U (en) | 2023-05-09 | 2023-05-09 | Voltage sag process simulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321094780.1U CN219957694U (en) | 2023-05-09 | 2023-05-09 | Voltage sag process simulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219957694U true CN219957694U (en) | 2023-11-03 |
Family
ID=88546064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321094780.1U Active CN219957694U (en) | 2023-05-09 | 2023-05-09 | Voltage sag process simulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219957694U (en) |
-
2023
- 2023-05-09 CN CN202321094780.1U patent/CN219957694U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102403916B (en) | Design method of simulation accelerating circuit | |
| CN114019297B (en) | High-frequency transient characteristic signal generating device of distribution line and control method thereof | |
| JP6693595B1 (en) | Grid interconnection device | |
| Bruno et al. | A low-cost controller to enable synthetic inertia response of distributed energy resources | |
| CN107480348B (en) | Power interface circuit and digital-analog hybrid simulation system | |
| CN219957694U (en) | Voltage sag process simulator | |
| CN111060786A (en) | Partial discharge generating device and method with adjustable discharge quantity and density based on phase | |
| CN104852616A (en) | Power grid simulator with line impedance simulation function, and control method | |
| CN113504467A (en) | High-precision waveform inversion system | |
| CN109839524B (en) | Voltage sag generator and voltage sag control system | |
| CN110011308B (en) | Modular power grid background harmonic simulation device and control method thereof | |
| Gallo et al. | A voltage transducer for electrical grid disturbance monitoring over a wide frequency range | |
| CN212646800U (en) | Digital wireless current transformer | |
| JP2021035253A (en) | Simulation device | |
| CN103199825B (en) | Method and circuit for regulating and controlling DDS output signal amplitudes based on DCPs | |
| CN206920526U (en) | Multi-terminal direct current test system | |
| CN107345975B (en) | Electric energy metering conversion device and method for applying same | |
| CN221124730U (en) | Same-frequency phased up-current test equipment taking system power supply as reference | |
| Wagner et al. | Analysis of Different Latencies and Time Delays in a Coupled Power-Hardware-in-the-Loop Laboratory | |
| CN205404654U (en) | Intelligent voltmeter range governing system | |
| CN108400717A (en) | A kind of fast-response magnet power supply based on high power up amps | |
| CN213879643U (en) | Three-phase electrician examines and determine with adjustable voltage PWM driver | |
| CN100462727C (en) | Simulator of AC electronic load suitable to any waveform of AC signal | |
| CN219143339U (en) | Three-phase medium-frequency alternating current constant current source | |
| Purcaru et al. | Signal processing and generating unit for power system simulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |