CN110649824A - Many electric energy quality of distribution network administer device coordinated control effect test source circuit - Google Patents
Many electric energy quality of distribution network administer device coordinated control effect test source circuit Download PDFInfo
- Publication number
- CN110649824A CN110649824A CN201910846812.0A CN201910846812A CN110649824A CN 110649824 A CN110649824 A CN 110649824A CN 201910846812 A CN201910846812 A CN 201910846812A CN 110649824 A CN110649824 A CN 110649824A
- Authority
- CN
- China
- Prior art keywords
- power
- alternating current
- frequency
- inverter circuit
- output
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/0077—Plural converter units whose outputs are connected in series
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a coordinated control effect test source circuit of a power distribution network multi-electric-energy quality control device, and aims to provide a coordinated control effect test source circuit of a power distribution network multi-electric-energy quality control device, which can support high-power, composite and wide-frequency-band electric energy quality disturbance. The power frequency alternating current power supply comprises a power frequency alternating current power supply with 50Hz and 220V, a power frequency alternating current-direct current-alternating current rectification inverter circuit and a high frequency alternating current-direct current-alternating current rectification inverter circuit which are same in topology, a high frequency transformer and a power frequency transformer; the two ends of the 50Hz and 200V power frequency alternating current power supply are respectively connected to the input end of the power frequency alternating current-direct current-alternating current rectification inverter circuit and the input end of the high-frequency alternating current-direct current-alternating current rectification inverter circuit, the output end of the power frequency alternating current-alternating current rectification inverter circuit is connected with the input end of the power frequency output transformer, the output end of the high-frequency alternating current-alternating current rectification inverter circuit is connected with the input end of the high-frequency output transformer, and the output end of the high-frequency transformer and the output end of the power frequency; and the reconstructed output voltage is used as an output signal of a power distribution network multi-electric energy quality control device coordination control effect test source circuit. The invention has the advantages of large power quality disturbance power, more combinations, wide frequency band, small loss, low temperature rise and the like.
Description
Technical Field
The invention belongs to the technical field of comprehensive control of power quality of a power distribution network, and particularly provides a coordinated control effect test source circuit of a multi-power quality control device of the power distribution network.
Background
The power distribution network has the problems of voltage harmonic, voltage deviation, voltage sag and other steady-state and transient disturbance of the power supply voltage of the power distribution network, and nonlinearity, unbalance, low power factor and other problems of the power load, which can seriously affect the safe and efficient operation of the power distribution network. In order to solve the problems, various power quality control devices are arranged in the power distribution network, and the devices are developed and produced by different supply enterprises and have different functions, installed capacities and working characteristics. A large number of treatment equipment runs in the power distribution network and generates obvious mutual influence, so that the equipment can not normally run or can not achieve the control effect, and the power and voltage oscillation of the power distribution network can be seriously caused. Therefore, the coordination control of the multiple electric energy quality control devices of the power distribution network becomes a hotspot of technical development and engineering application. In order to cooperate with the effect test of the coordination control among the multiple electric energy quality control devices, a multiple modulation test source circuit which can test the coordination control effect of the various electric energy quality needs to be developed, the circuit not only can meet the flexible output and the combined output of various electric energy quality problems, but also can flexibly modulate the power combination under multiple frequencies, and the test condition of the coordination control effect among the multiple electric energy quality control devices can be guaranteed.
However, the test of the effect of the coordination control of the multi-electric energy quality control device, such as the indexes of the full-node harmonic characteristic, the voltage characteristic, the network loss and the like of the power distribution network, becomes a difficult problem due to the lack of a test source.
At present, a test source circuit of power quality is mainly realized through a power grid simulator, a thyristor phase control circuit and the like, the test cost is high, the control is complex, and particularly under the coordination control of a multi-power quality control device, an ideal test source circuit for the comprehensive index of the power quality of all nodes of a power distribution network is not available. The test source circuit is required to be suitable for setting and modulating all disturbance types, control parameters and multi-frequency bandwidths, and the inverter topology in the traditional meaning is difficult to adapt to the requirement, because when the inverter modulates and outputs disturbance signals in a wide frequency band, the switching frequency is high under a high-power condition, extremely high loss is easily generated, the temperature rise is very serious, and the stable operation of a semiconductor switch device of the inverter is greatly influenced. Therefore, the invention provides a main circuit idea that the high-power fundamental wave modulation inverter and the low-power high-frequency modulation inverter are combined to form a multi-electric energy quality treatment device coordination control effect test source, the topological structure can generate disturbance simulation of all electric energy quality and can also adapt to the requirement of outputting ultrahigh bandwidth signals, and meanwhile, the device has low loss and low temperature rise, and the technology has huge market and application prospects.
A power distribution network multi-electric energy quality control device coordination control effect test source circuit can effectively simulate various disturbances generated by operation of various distributed power sources, dynamic devices and power loads in a real power distribution network, can also simulate propagation disturbances on equivalent nodes of a local power distribution network, and is beneficial to research on influences of new equipment such as various distributed power sources and electric automobile charging facilities on power systems, secondary equipment and power loads.
The invention provides a power distribution network multi-power quality control device coordination control effect test source circuit which comprises a 50Hz and 220V power frequency alternating current power supply, two AC-DC-AC rectification inverter circuits with the same topology and a voltage reconstruction circuit with superposed two-path output voltages.
Two ends of a 50Hz and 200V power frequency alternating current power supply 1 are respectively connected to the input end of a power frequency alternating current-direct current-alternating current rectification inverter circuit 2 and the input end of a high-frequency alternating current-direct current-alternating current rectification inverter circuit 3, the output end of the power frequency alternating current-alternating current rectification inverter circuit 2 is connected with the input end of a power frequency output transformer 5, the output end of the high-frequency alternating current-alternating current rectification inverter circuit 3 is connected with the input end of a high-frequency output transformer 4, and the output ends of the high-frequency transformer 4 and the power frequency transformer 5 are connected in series to form a reconstructed output voltage u0 serving.
The power frequency AC-DC-AC rectification inverter circuit 2 outputs a high-power fundamental voltage signal in a power disturbance source, and the carrier frequency selection range is 500-800 Hz; the high-frequency AC-DC-AC rectification inverter circuit 3 outputs a low-power high-frequency voltage signal in a power disturbance source, and the carrier frequency selection range is 5000Hz-20000 Hz. The two outputs are suitable for different frequency spectrum ranges, and the characteristics of respective inverters are fully exerted.
The invention provides a thought that a high-power fundamental wave modulation inverter and a low-power high-frequency modulation inverter are combined to form a power distribution network multi-electric energy quality control device coordination control effect test source circuit, the topological structure can generate disturbance simulation of all electric energy quality and can also adapt to the requirement of outputting ultrahigh bandwidth signals, meanwhile, the equipment loss is low, the temperature rise is low, and the technology has huge market and application prospects.
A power distribution network multi-electric energy quality control device coordinated control effect test source circuit can effectively simulate various disturbances generated by operation of various distributed power supplies, dynamic devices and power loads in a real power distribution network, can also simulate propagation disturbances on equivalent nodes of a local power distribution network, and can effectively support testing of the power distribution network multi-electric energy quality control device coordinated control effect.
Disclosure of Invention
The invention aims to provide a coordinated control effect test source circuit of a power distribution network multi-electric-energy quality control device, which is used for generating various electric-energy disturbance interferences such as frequency deviation, voltage harmonic, voltage sag, voltage deviation, short-time power supply interruption, three-phase imbalance and the like, can simulate the characteristics of a distributed power supply, an electric automobile charging facility, an energy storage device and an electricity load, and supports the coordinated control effect test research of the power distribution network multi-electric-energy quality control device.
The invention provides a power distribution network multi-power quality control device coordination control effect test source circuit which comprises a 50Hz and 220V power frequency alternating current power supply, two AC-DC-AC rectification inverter circuits with the same topology and a voltage reconstruction circuit with superposed two-path output voltages.
Two ends of a 50Hz and 220V power frequency alternating current power supply 1 are respectively connected to the input end of a power frequency alternating current-direct current-alternating current rectification inverter circuit 2 and the input end of a high-frequency alternating current-direct current-alternating current rectification inverter circuit 3, the output end of the power frequency alternating current-alternating current rectification inverter circuit 2 is connected with the input end of a power frequency output transformer 5, the output end of the high-frequency alternating current-alternating current rectification inverter circuit 3 is connected with the input end of a high-frequency output transformer 4, and the output ends of the high-frequency transformer 4 and the power frequency transformer 5 are connected in series to form a reconstructed output voltage u 0.
The power frequency AC-DC-AC rectification inverter circuit 2 outputs a high-power fundamental voltage signal in a power disturbance source, and the carrier frequency selection range is 500-800 Hz; the high-frequency AC-DC-AC rectification inverter circuit 3 outputs a low-power high-frequency voltage signal in a power disturbance source, and the carrier frequency selection range is 5000Hz-20000 Hz. The two outputs are suitable for different frequency spectrum ranges, and the characteristics of respective inverters are fully exerted.
The invention provides a power distribution network multi-electric energy quality treatment device coordination control effect test source circuit which is shown in the attached figure 1 and comprises five parts, namely a 50Hz power frequency alternating current power supply 1, a 220V power frequency alternating current power supply, a power frequency alternating current-direct current-alternating current rectification inverter circuit 2, a high frequency alternating current-direct current-alternating current rectification inverter circuit 3, a high frequency output transformer 4 and a power frequency output transformer 5.
The working principle of the power distribution network multi-electric energy quality control device coordination control effect test source circuit is briefly described as follows.
In the power frequency AC-DC-AC rectification inverter circuit 2, a single-phase full-bridge PWM rectifier composed of I1, I2, I3 and I4 rectifies a power frequency AC signal of a power frequency power supply 1 of 50Hz and 220V into DC through a connecting reactor L1, and provides stable DC bus voltage for a rear-stage single-phase full-bridge PWM inverter composed of I5, I6, I7 and I8. The single-phase full-bridge PWM rectifier ensures high power factor at the network side and low harmonic content of output current; the full-bridge inverter at the rear stage adopts voltage and current instantaneous value double closed-loop control, so that the inverter is ensured to have good output waveform tracking performance and good dynamic performance. The full-bridge inverter outputs a modulation waveform containing a high-frequency carrier frequency and a power frequency modulation frequency, and the modulation waveform is output to the primary side of a power frequency output transformer T1 through a high-pass filter formed by Lf1 and Cf1 to obtain a power frequency output voltage u1 of the secondary side of the power frequency output transformer 5.
In the high-frequency ac-dc-ac rectification inverter circuit 3, a single-phase full-bridge PWM rectifier composed of J1, J2, J3 and J4 rectifies an ac power signal of a power frequency power supply 1 of 50Hz and 220V into a dc through a connecting reactor L2, and provides a stable dc bus voltage for a subsequent single-phase full-bridge PWM inverter composed of J5, J6, J7 and J8. The single-phase full-bridge PWM rectifier ensures high power factor at the network side and low harmonic content of output current; the full-bridge inverter at the rear stage adopts voltage and current instantaneous value double closed-loop control, so that the inverter is ensured to have good output waveform tracking performance and good dynamic performance. The full-bridge inverter outputs a modulated waveform including a high-frequency carrier frequency and a predetermined combined high-order frequency, and the modulated waveform is output to the primary side of a high-frequency output transformer T2 through a high-pass filter composed of Lf2 and Cf2, so that a line-frequency output voltage u2 of the secondary side of the high-frequency output transformer 4 is obtained.
And finally, connecting u1 and u2 in series to obtain a reconstructed disturbance output voltage u 0.
The invention has the advantages that: the main circuit idea of forming the electric energy quality disturbance source by combining the high-power fundamental wave modulation inverter and the low-power high-frequency modulation inverter is provided, the topological structure can generate all electric energy quality disturbance simulation and can also adapt to the requirement of outputting ultrahigh bandwidth signals, meanwhile, the equipment loss is low, the temperature rise is low, and the technology has huge market and application prospects.
The topological structure provided by the invention can generate all power quality disturbance simulation, can also adapt to the requirement of outputting ultrahigh bandwidth signals, and has the advantages of low equipment loss, low temperature rise and huge market and application prospect.
Drawings
Fig. 1 is a test source circuit for a coordination control effect of a power distribution network multi-electric-energy quality control device provided by the invention. The power frequency alternating current power supply comprises a 50Hz and 220V power frequency alternating current power supply 1, a power frequency alternating current-direct current-alternating current rectification inverter circuit 2, a high-frequency alternating current-direct current-alternating current rectification inverter circuit 3, a high-frequency output transformer 4 and a power frequency output transformer 5.
Detailed Description
The following describes a specific implementation method of the present invention with reference to the drawings.
The invention provides a coordinated control effect test source circuit for a power distribution network multi-electric energy quality control device. The power frequency alternating current power supply comprises a 50Hz and 220V power frequency alternating current power supply 1, a power frequency alternating current-direct current-alternating current rectification inverter circuit 2, a high-frequency alternating current-direct current-alternating current rectification inverter circuit 3, a high-frequency output transformer 4 and a power frequency output transformer 5.
The invention provides a controllable electric energy quality power generation source main circuit matched with a real-time simulation technology, which consists of a 50Hz and 220V power frequency alternating current power supply, two AC-DC-AC rectification inverter circuits with the same topology and a voltage reconstruction circuit for superposing output voltages of two paths.
Two ends of a 50Hz and 220V power frequency alternating current power supply 1 are respectively connected to the input end of a power frequency alternating current-direct current-alternating current rectification inverter circuit 2 and the input end of a high-frequency alternating current-direct current-alternating current rectification inverter circuit 3, the output end of the power frequency alternating current-alternating current rectification inverter circuit 2 is connected with the input end of a power frequency output transformer 5, the output end of the high-frequency alternating current-alternating current rectification inverter circuit 3 is connected with the input end of a high-frequency output transformer 4, and the output ends of the high-frequency transformer 4 and the power frequency transformer 5 are connected in series to form a reconstructed output voltage u 0.
The power frequency AC-DC-AC rectification inverter circuit 2 outputs a high-power fundamental voltage signal in a power disturbance source, and the carrier frequency selection range is 500-800 Hz; the high-frequency AC-DC-AC rectification inverter circuit 3 outputs a low-power high-frequency voltage signal in a power disturbance source, and the carrier frequency selection range is 5000Hz-20000 Hz. The two outputs are suitable for different frequency spectrum ranges, and the characteristics of respective inverters are fully exerted.
In the power frequency AC-DC-AC rectification inverter circuit 2, a single-phase full-bridge PWM rectifier composed of I1, I2, I3 and I4 rectifies a power frequency AC signal of a power frequency power supply 1 of 50Hz and 220V into DC through a connecting reactor L1, and provides stable DC bus voltage for a rear-stage single-phase full-bridge PWM inverter composed of I5, I6, I7 and I8. The single-phase full-bridge PWM rectifier ensures high power factor at the network side and low harmonic content of output current; the full-bridge inverter at the rear stage adopts voltage and current instantaneous value double closed-loop control, so that the inverter is ensured to have good output waveform tracking performance and good dynamic performance. The full-bridge inverter outputs a modulation waveform containing a high-frequency carrier frequency and a power frequency modulation frequency, and the modulation waveform is output to the primary side of a power frequency output transformer T1 through a high-pass filter formed by Lf1 and Cf1 to obtain a power frequency output voltage u1 of the secondary side of the power frequency output transformer 5.
In the high-frequency ac-dc-ac rectification inverter circuit 3, a single-phase full-bridge PWM rectifier composed of J1, J2, J3 and J4 rectifies an ac power signal of a power frequency power supply 1 of 50Hz and 220V into a dc through a connecting reactor L2, and provides a stable dc bus voltage for a subsequent single-phase full-bridge PWM inverter composed of J5, J6, J7 and J8. The single-phase full-bridge PWM rectifier ensures high power factor at the network side and low harmonic content of output current; the full-bridge inverter at the rear stage adopts voltage and current instantaneous value double closed-loop control, so that the inverter is ensured to have good output waveform tracking performance and good dynamic performance. The full-bridge inverter outputs a modulated waveform including a high-frequency carrier frequency and a predetermined combined high-order frequency, and the modulated waveform is output to the primary side of a high-frequency output transformer T2 through a high-pass filter composed of Lf2 and Cf2, so that a line-frequency output voltage u2 of the secondary side of the high-frequency output transformer 4 is obtained.
And finally, connecting u1 and u2 in series to obtain a reconstructed disturbance output voltage u 0.
Claims (3)
1. A power distribution network multi-electric energy quality control device coordination control effect test source circuit comprises a 50Hz and 220V power frequency alternating current power supply, a power frequency alternating current-direct current-alternating current rectification inverter circuit and a high frequency alternating current-direct current-alternating current rectification inverter circuit which are identical in topology, a high frequency transformer and a power frequency transformer; the method is characterized in that: the two ends of the 50Hz and 200V power frequency alternating current power supply are respectively connected to the input end of the power frequency alternating current-direct current-alternating current rectification inverter circuit and the input end of the high-frequency alternating current-direct current-alternating current rectification inverter circuit, the output end of the power frequency alternating current-alternating current rectification inverter circuit is connected with the input end of the power frequency output transformer, the output end of the high-frequency alternating current-alternating current rectification inverter circuit is connected with the input end of the high-frequency output transformer, and the output end of the high-frequency transformer and the output end of the power frequency; and the reconstructed output voltage is used as an output signal of a power distribution network multi-electric energy quality control device coordination control effect test source circuit.
2. The power distribution network multi-power quality control device coordination control effect test source circuit according to claim 1, characterized in that: the carrier frequency selection range of the high-power fundamental voltage signal in the power frequency AC-DC-AC rectification inverter circuit output power disturbance source is 500-800 Hz.
3. The power distribution network multi-electric-energy-quality governance device coordination control effect test source circuit according to claim 1 or 2, characterized in that: the carrier frequency selection range of a low-power high-frequency voltage signal in the output power disturbance source of the high-frequency AC-DC-AC rectification inverter circuit is 5000Hz-20000 Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910846812.0A CN110649824A (en) | 2019-09-06 | 2019-09-06 | Many electric energy quality of distribution network administer device coordinated control effect test source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910846812.0A CN110649824A (en) | 2019-09-06 | 2019-09-06 | Many electric energy quality of distribution network administer device coordinated control effect test source circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110649824A true CN110649824A (en) | 2020-01-03 |
Family
ID=69010221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910846812.0A Pending CN110649824A (en) | 2019-09-06 | 2019-09-06 | Many electric energy quality of distribution network administer device coordinated control effect test source circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110649824A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111413642A (en) * | 2020-04-13 | 2020-07-14 | 浙江华电器材检测研究所有限公司 | Impact compensation circuit for sudden short-circuit test of transformer |
| CN112180157A (en) * | 2020-09-28 | 2021-01-05 | 国电联合动力技术有限公司 | Wind turbine generator generating capacity metering method and intelligent analysis method and system based on wind turbine generator generating capacity metering method |
| 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
- 2019-09-06 CN CN201910846812.0A patent/CN110649824A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111413642A (en) * | 2020-04-13 | 2020-07-14 | 浙江华电器材检测研究所有限公司 | Impact compensation circuit for sudden short-circuit test of transformer |
| CN112180157A (en) * | 2020-09-28 | 2021-01-05 | 国电联合动力技术有限公司 | Wind turbine generator generating capacity metering method and intelligent analysis method and system based on wind turbine generator generating capacity metering method |
| 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 |
|---|---|---|
| Gali et al. | Mitigation of power quality problems using shunt active power filters: A comprehensive review | |
| CN110649824A (en) | Many electric energy quality of distribution network administer device coordinated control effect test source circuit | |
| CN103427425A (en) | Coordinated control device and method for MMC (modular multilevel converter) type unified power quality conditioner | |
| CN107332231A (en) | Suitable for MW grades of high-power grid simulator topological structure | |
| Al-Shetwi et al. | Harmonic distortion and voltage imbalance study of photovoltaic power plant connected to the Malaysian grid | |
| Saha et al. | Improved 48-pulse static synchronous compensator for high-voltage applications | |
| CN210982623U (en) | Thyristor control transformer characteristic test circuit | |
| de Almeida et al. | A bidirectional single-stage three-phase rectifier with high-frequency isolation and power factor correction | |
| Jing et al. | Network topology and operation control of DC distribution network with AC DC converter | |
| Sun et al. | A Cascaded Multilevel Modular Energy Router Hybrid Photovoltaic and Energy Storage With Improved Power Balance Capability | |
| Wenzhi et al. | Equivalent modeling of power electronic transformer in AC-DC hybrid system | |
| CN208224745U (en) | High-power electrical energy power quality disturbance platform based on the emulation of digital physical mixed | |
| Cheng et al. | A modeling approach for AC/DC distribution systems based on average dynamic phasor method | |
| Xu et al. | MMC-DC/DC Converter and Its Control Strategy for Offshore Full DC Wind Power System | |
| Shah et al. | A Real-Time Environment Modelling and Power Quality Analysis of Grid-connected PV System using Typhoon HIL | |
| CN111413642A (en) | Impact compensation circuit for sudden short-circuit test of transformer | |
| CN110658370A (en) | High-voltage large-capacity SVG test power supply | |
| Lu et al. | Generalized State Space Average-value Model of MAB Based Power Electrical Transformer | |
| CN203086139U (en) | Chain type SVG achieving active filtering function based on chain type power unit topological structure | |
| Liu et al. | Dynamic Harmonic Analysis of Power Router with Common High-frequency AC Bus Based on Phase Shift Control | |
| Gao et al. | Design of backstepping controller for T-type network inverter | |
| Jia et al. | Analysis of AC asymmetrical fault on DC control system in hybrid AC/DC microgrid | |
| Xin et al. | Harmonic Characterization of Medium-Voltage Distribution Networks with Photovoltaic Generation | |
| Xu et al. | RESEARCH ON KEY TECHNOLOGY OF EXTENDING POWER SUPPLY RADIUS IN SPARSE AREA | |
| Zhi et al. | Research on Main Circuit of Voltage Sag Generator Based on MATLAB Platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200103 |