CN109149615A - A kind of power grid high-frequency resonance adaptive active damping system and method - Google Patents
A kind of power grid high-frequency resonance adaptive active damping system and method Download PDFInfo
- Publication number
- CN109149615A CN109149615A CN201810956549.6A CN201810956549A CN109149615A CN 109149615 A CN109149615 A CN 109149615A CN 201810956549 A CN201810956549 A CN 201810956549A CN 109149615 A CN109149615 A CN 109149615A
- Authority
- CN
- China
- Prior art keywords
- resonance
- frequency
- impedance
- silicon carbide
- switch
- 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
- 238000013016 damping Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000003044 adaptive effect Effects 0.000 title abstract description 12
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000000605 extraction Methods 0.000 claims abstract description 12
- 238000013459 approach Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910003978 SiClx Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- 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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
- H02J2003/365—Reducing harmonics or oscillations in HVDC
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention patent discloses a kind of power grid high-frequency resonance adaptive active damping system and method, the access power grid point of flexible HVDC transmission system connects active damper, the active damper includes silicon carbide high frequency inverter, silicon carbide inverter one end is connected in grid entry point, the other end is connected with impedance regulator, impedance regulator is connected with switch, the other end of switch is connected with resonance-characteristic extraction unit, resonance-characteristic other end extraction unit is connected in grid entry point, realizes the purpose for eliminating high-frequency resonant.
Description
Technical field
The invention patent relates to electric system high-frequency resonant stability techniques fields, more specifically to a kind of power grid
High-frequency resonant adaptive active damping system and method
Background technique
China's hydraulic power potentials is concentrated mainly on southwest, eastern region power load Relatively centralized.Implement remote, big
Capacity " transferring electricity from the west to the east " is the objective requirement that China optimized allocation of resources, solved the energy Yu electric load contrary distribution, and will
The resources advantage of Developing west China becomes economic advantages, promotes the important measures of the economic joint development of eastern and western regions.Directly
Stream transmission of electricity uses Technics of Power Electronic Conversion technology, and the cleaning water power of sending end is converted to high voltage direct current and passes through remote-distance overhead wire
It is delivered to receiving end load center, power transmission efficiency is high, saves cost and transmission of electricity corridor, it has also become the major way of " transferring electricity from the west to the east ".
Flexible DC transmission is the HVDC Transmission Technology of new generation based on voltage source converter, in new energy consumption, warp
Ji property, flexibility and reliability etc. have significant advantage, are developed rapidly in recent years.But with flexible direct current
Being continuously increased of transmission line capability, scale application of the large power power electronic appliance in power grid, flexible DC transmission exist with
The risk that power grid generates high-frequency resonant is accessed, electricity net safety stable and power equipment safety are influenced.
As shown in Figure 1, flexible HVDC transmission system is respectively connected to sending end by two ac/dc (AC/DC) inverters
Power grid and receiving end power grid.Sending end power grid includes the generator units such as Hydropower Unit, fired power generating unit and photovoltaic/wind-powered electricity generation, receiving end power grid packet
Containing the important loads such as smeltery, local power supply and reactive compensation, power supply and novel device.It is flexible straight under specific run mode
Resonant tank may be constituted with long distance transmission line, smeltery etc. by flowing transmission system, generate high-frequency resonant phenomenon, the problem is close
Gradually show over year in engineering sites such as wind power plant, large capacity flexible direct current converter stations.
In order to solve the problems, such as high-frequency resonant, mainly optimized at present by the controller to flexible HVDC transmission system or
Passive filter is configured in grid entry point, changes system port characteristic, destroys flexible HVDC transmission system, transmission line of electricity and receiving end electricity
The high-frequency resonant circuit of net.
Summary of the invention
The purpose of the embodiment of the present invention is that providing a kind of power grid high-frequency resonance adaptive active damping system and method, realize
Inhibit the purpose of high-frequency resonant.
A kind of active damping system, which is characterized in that the output end of flexible HVDC transmission system connects active damper, institute
Stating active damper includes silicon carbide high frequency inverter, and one section of the silicon carbide inverter is connected in grid entry point, and the other end connects
It is connected to impedance regulator, the impedance regulator is connected with switch, and the other end of switch is connected with resonance-characteristic extraction unit, institute
Resonance-characteristic other end extraction unit is stated to be connected in grid entry point.
Preferably, the switch is single-pole three-throw switch.
Preferably, a method of eliminating high-frequency resonant, include the following steps:
The first step, the active damping acquire grid-connected current information；
Second step extracts grid-connected current resonance-characteristic amount, and judges whether that resonance occurs, and resonance such as occurs, by resonance spy
Frequency f, the amplitude A, phase of sign amountIt is sent into impedance regulator, calculation method is as follows: impedance adjusting frequency range: f- Δ f~
F+ Δ f, wherein Δ f is preset bandwidth, can voluntarily be adjusted according to not homologous ray, impedance magnitude: | Zref|=K1/ A, wherein K1For
Preset proportionality coefficient can voluntarily be adjusted, impedance phase according to not homologous ray:Wherein K2For preset ratio
Coefficient can voluntarily be adjusted according to not homologous ray, obtain target impedance value Zref；
Third step, by the ZrefIt send to silicon carbide high frequency inverter, the high frequency inverter instructs according to Zref and adjusts carbon
The timing and turn-on time of SiClx device high-speed switch, actual port impedance operator approach target value.
Preferably, the resonance-characteristic amount is extracted by filter or Fourier algorithm.
Preferably, when the silicon carbide high frequency inverter controls to adjust the timing and conducting of high-speed switch by inner and outer ring
Between.
Preferably, three switches of the single-pole three-throw switch respectively correspond frequency, amplitude and phase.
Preferably, the silicon carbide high frequency inverter can realize the switching frequency of kilohertz.
Compared with prior art, a kind of power grid high-frequency resonance adaptive active damping system and method disclosed by the invention,
By the technical solution of the adaptive active damper of the configuring high-frequency resonance in grid entry point, so that active damper is access grid-connected
Point detects automatic adjusument means with closed loop, can adapt to operation of power networks under the premise of not influencing system original idle characteristic
The change of mode, automatic damping different frequency range resonance thoroughly eliminate high-frequency resonant problem.
Active damper uses silicon carbide device, and active damper damping frequency range is improved to few kilohertz, simultaneously because carbon
SiClx device HF switch and low loss characteristic, the volume of whole system and loss significantly reduce.
Detailed description of the invention
Fig. 1 is prior art flexible HVDC transmission system access power grid schematic diagram；
Fig. 2 is a kind of schematic diagram of active damping system access grid entry point in the present invention；
Fig. 3 is the schematic diagram of adaptive active damping structure in the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figures 2 and 3, a kind of active damping system, which is characterized in that the output end of flexible HVDC transmission system connects
Active damper is connect, the active damper includes silicon carbide high frequency inverter, and silicon carbide inverter one end is connected to simultaneously
On site, the other end is connected with impedance regulator, and the impedance regulator is connected with single-pole three-throw switch, and the other end of switch connects
It is connected to resonance-characteristic extraction unit, the resonance-characteristic other end extraction unit is connected in grid entry point.
A method of it eliminating high-frequency resonant and includes the following steps: for a kind of above-mentioned flexible HVDC transmission system
(1) flexible HVDC transmission system of high-frequency resonant can not be eliminated for being completed or by optimizing Body Controller,
It can be occurred according to resonance in sending end or receiving end power grid (being determined by System History operating condition), corresponding configuring high-frequency resonance is adaptive
Active damper.
(2) in view of the frequency range that resonance occurs may be up to few kilohertz, using carbonization in adaptive active damper
Silicon high frequency inverter.Silicon carbide high frequency inverter use advanced silicon carbide device, it can be achieved that kilohertz switching frequency,
Inverter flexibly, accurately adjust in the characteristic of few kilohertz by the control of high speed inner and outer ring.
(3) after the access grid-connected point of high-frequency resonant adaptive active damper, grid-connected current information is acquired, is sent into resonance-characteristic
Extraction unit.
(4) resonance-characteristic extraction unit is extracted according to the grid-connected current information of acquisition by filter or Fourier algorithm
Frequency f, amplitude A and the phase of harmonic components(prior art) extracts to three-phase current and compares calculating.
(5) whether reach the threshold value A of setting by comparing the amplitude of harmonic components0, such as larger than A0Then think that resonance has occurred
Phenomenon, comparing unit output are 1, and the harmonic components feature of extraction is sent into impedance regulator by closure switch K；Such as less than A0Then recognize
For resonance phenomena does not occur, active damper is standby, and switch K is kept open, and the harmonic components feature of extraction is not sent into resistance
Anti- adjuster, switch K are single-pole three-throw switch, are uniformly controlled the switching of three switches, three switch K respectively correspond frequency, width
Value and phase.
(6) impedance regulator is according to the frequency f, amplitude A and phase of the harmonic components of inputActive damper is calculated to connect
Enter the port impedance characteristic of alternating current target value Z of grid entry pointref, calculation method is as follows:
Impedance adjusts frequency range: f- Δ f~f+ Δ f, and wherein Δ f is preset bandwidth, can be according to not homologous ray voluntarily
It adjusts.
Impedance magnitude: | Zref|=K1/ A, wherein K1For preset proportionality coefficient, can voluntarily be adjusted according to not homologous ray.
Impedance phase:Wherein K2For preset proportionality coefficient, can voluntarily be adjusted according to not homologous ray.
(7) the port impedance characteristic of alternating current target value Z that impedance regulator is calculatedrefIt is sent into silicon carbide high frequency inverter, carbon
SiClx high frequency inverter is according to ZrefIt is controlled by inner and outer ring, adjusts the timing and turn-on time of silicon carbide device high-speed switch, make
Actual port impedance operator approaches target value, realizes the effective damping to high-frequency resonant.
Preferably, Δ f can be set to 0, but actually be difficult to accurately be damped for single resonance frequency, need to close
Δ f is arranged to guarantee the validity and robustness that damp in a frequency range in reason.K1 and K2 is adjustment factor, is respectively used to
Calculate target impedance amplitude and phase.
By the technical solution of the adaptive active damper of the configuring high-frequency resonance in grid entry point, so that active damper
Access grid-connected point and closed loop detect automatic adjusument means, can adapt under the premise of not influencing system original idle characteristic
The change of grid operation mode, automatic damping different frequency range resonance thoroughly eliminate high-frequency resonant problem.
Active damper uses silicon carbide device, small in size, high-efficient.Active damper damping frequency range is improved to thousands of conspicuous
Hereby, simultaneously because silicon carbide device HF switch and low loss characteristic, the volume of whole system and loss significantly reduce.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (6)
1. a kind of active damping system, which is characterized in that the output end of flexible HVDC transmission system connects active damper, described
Active damper includes silicon carbide high frequency inverter, and silicon carbide inverter one end is connected in grid entry point, other end connection
There is impedance regulator, the impedance regulator is connected with switch, and the other end of switch is connected with resonance-characteristic extraction unit, described
Resonance-characteristic other end extraction unit is connected in grid entry point.
2. a kind of flexible HVDC transmission system as described in claim 1, which is characterized in that the switch is opened for single-pole three throw
It closes.
3. a kind of method for eliminating high-frequency resonant, for a kind of active system of any one described in claim 1-2, feature
It is, includes the following steps:
The first step, the active damping acquire grid-connected current information；
Second step extracts grid-connected current resonance-characteristic amount, and judges whether that resonance occurs, and resonance such as occurs, by resonance-characteristic amount
Frequency f, amplitude A, phaseIt is sent into impedance regulator, calculation method is as follows:
Impedance adjusts frequency range: f- Δ f~f+ Δ f, and wherein Δ f is preset bandwidth, can voluntarily be adjusted according to not homologous ray
Section, impedance magnitude: | Zref|=K1/ A, wherein K1For preset proportionality coefficient, can voluntarily be adjusted according to not homologous ray, impedance phase
Position:Wherein K2For preset proportionality coefficient, it can voluntarily be adjusted according to not homologous ray, obtain target impedance value
Zref；
Third step, by the ZrefIt send to silicon carbide high frequency inverter, the high frequency inverter instructs according to Zref and adjusts silicon carbide
The timing and turn-on time of device high-speed switch, actual port impedance operator approach target value.
4. a kind of method for eliminating high-frequency resonant as claimed in claim 3, which is characterized in that the silicon carbide high frequency inverter
The timing and turn-on time of high-speed switch are controlled to adjust by inner and outer ring.
5. a kind of method for eliminating high-frequency resonant as claimed in claim 3, which is characterized in that the three of the single-pole three-throw switch
A switch respectively corresponds frequency, amplitude and phase.
6. a kind of active damping system as claimed in claim 2, which is characterized in that the silicon carbide high frequency inverter can be realized
The switching frequency of kilohertz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810956549.6A CN109149615A (en) | 2018-08-21 | 2018-08-21 | A kind of power grid high-frequency resonance adaptive active damping system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810956549.6A CN109149615A (en) | 2018-08-21 | 2018-08-21 | A kind of power grid high-frequency resonance adaptive active damping system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109149615A true CN109149615A (en) | 2019-01-04 |
Family
ID=64790841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810956549.6A Pending CN109149615A (en) | 2018-08-21 | 2018-08-21 | A kind of power grid high-frequency resonance adaptive active damping system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109149615A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110266009A (en) * | 2019-07-05 | 2019-09-20 | 华中科技大学 | A kind of exchange micro-capacitance sensor higher hamonic wave active stabilization device and method |
| CN111541263A (en) * | 2020-06-10 | 2020-08-14 | 南方电网科学研究院有限责任公司 | Harmonic control strategy evaluation method, system and equipment for flexible direct current transmission system |
| CN111799833A (en) * | 2020-08-04 | 2020-10-20 | 南方电网科学研究院有限责任公司 | Flexible direct current high-frequency resonance suppression method, system and equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253337A (en) * | 2016-08-19 | 2016-12-21 | 南京航空航天大学 | A kind of impedance adapter for multiple stage grid-connected inverters system of calming |
| CN106972519A (en) * | 2017-04-27 | 2017-07-21 | 湖南大学 | The active damping control device and method of DC transmission system DC side resonance |
| EP3345277A1 (en) * | 2015-09-01 | 2018-07-11 | ABB Schweiz AG | Voltage source converter (vsc) control system with active damping |
-
2018
- 2018-08-21 CN CN201810956549.6A patent/CN109149615A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3345277A1 (en) * | 2015-09-01 | 2018-07-11 | ABB Schweiz AG | Voltage source converter (vsc) control system with active damping |
| CN106253337A (en) * | 2016-08-19 | 2016-12-21 | 南京航空航天大学 | A kind of impedance adapter for multiple stage grid-connected inverters system of calming |
| CN106972519A (en) * | 2017-04-27 | 2017-07-21 | 湖南大学 | The active damping control device and method of DC transmission system DC side resonance |
Non-Patent Citations (2)
| Title |
|---|
| XIONGFEI WANG: "An Active Damper for Stabilizing Power-Electronics-Based AC Systems", 《IEEE TRANSACTIONS ON POWER ELECTRONICS》 * |
| 刘怀远: "并网换流器系统谐振的分析、检测与消除", 《中国电机工程学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110266009A (en) * | 2019-07-05 | 2019-09-20 | 华中科技大学 | A kind of exchange micro-capacitance sensor higher hamonic wave active stabilization device and method |
| CN111541263A (en) * | 2020-06-10 | 2020-08-14 | 南方电网科学研究院有限责任公司 | Harmonic control strategy evaluation method, system and equipment for flexible direct current transmission system |
| CN111541263B (en) * | 2020-06-10 | 2022-02-15 | 南方电网科学研究院有限责任公司 | Harmonic control strategy evaluation method, system and equipment for flexible direct current transmission system |
| CN111799833A (en) * | 2020-08-04 | 2020-10-20 | 南方电网科学研究院有限责任公司 | Flexible direct current high-frequency resonance suppression method, system and equipment |
| CN111799833B (en) * | 2020-08-04 | 2022-04-29 | 南方电网科学研究院有限责任公司 | Flexible direct current high-frequency resonance suppression method, system and equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Yu et al. | System integration and hierarchical power management strategy for a solid-state transformer interfaced microgrid system | |
| CN103138290B (en) | Microgrid seamless switching control method based on improving phase control under peer mode | |
| CN106816888B (en) | Island detection method and system of virtual synchronous generator and microgrid control system | |
| Moawwad et al. | A New ${\rm P} $-${\rm Q} $-${\rm V} $ Droop Control Method for an Interline Photovoltaic (I-PV) Power System | |
| Ahmad et al. | An approach to improve active power flow capability by using dynamic unified power flow controller | |
| CN104300581B (en) | A kind of seamless combining inverter with grid-connected some dynamic voltage compensation and method thereof | |
| CN109149615A (en) | A kind of power grid high-frequency resonance adaptive active damping system and method | |
| CN108631363A (en) | Inverter photovoltaic virtual synchronous control method based on master slave control | |
| Hu et al. | Control strategy of the bi-directional converter for hybrid AC/DC microgrid | |
| Xin et al. | AC fault ride-through coordinated control strategy of LCC-MMC hybrid DC transmission system connected to passive networks | |
| CN108471135A (en) | Droop control seamless switching control method based on frequency and voltage amplitude limit | |
| Merritt et al. | Performance improvement of power systems using Hybrid Power Flow Controller | |
| CN104393591A (en) | Power supply system | |
| CN110376472A (en) | Method for detecting island of photovoltaic grid-connected inverter based on bicyclic current feedback control | |
| CN108879789A (en) | Bidirectional energy-storage Variable flow control device and method | |
| CN209462035U (en) | Bidirectional energy-storage Variable flow control device | |
| Pan et al. | A hierarchical control strategy for cascaded H-bridge multilevel static synchronous series compensator | |
| Lao et al. | Power electronic converters for low-frequency HVac transmission: functions and challenges | |
| Bhattacharya et al. | A practical operation strategy for STATCOM under single line to ground faults in the power system | |
| CN109193693A (en) | A kind of idle control optimization method based on flexible direct current system | |
| Yu et al. | Research on power flow control strategy of weak grid based on series-shunt combined converter | |
| Liu et al. | Mitigation of voltage fluctuation problem for a steel plant feeder by using PV-STATCOM | |
| Gaigowal et al. | Power Flow Control through Transmission Line using DSSC | |
| Zhen et al. | Power Control Strategy of Bidirectional Converter in Low Voltage AC/DC Hybrid Microgrid | |
| Huo et al. | Optimization of active distribution network source-grid-load interactive operation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190104 |