CN111327060B - APF (active Power Filter) coordinated optimization and adjustment method for distribution line in oil field - Google Patents
APF (active Power Filter) coordinated optimization and adjustment method for distribution line in oil field Download PDFInfo
- Publication number
- CN111327060B CN111327060B CN202010166868.4A CN202010166868A CN111327060B CN 111327060 B CN111327060 B CN 111327060B CN 202010166868 A CN202010166868 A CN 202010166868A CN 111327060 B CN111327060 B CN 111327060B
- Authority
- CN
- China
- Prior art keywords
- apf
- line
- harmonic current
- oil field
- equipment
- 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 31
- 238000005457 optimization Methods 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 claims description 12
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
-
- 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
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1871—Methods for planning installation of shunt reactive power compensators
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/20—Active power filtering [APF]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention belongs to the technical field of optimization of oil field distribution lines, and particularly relates to an APF (automatic power factor) coordination optimization adjustment method for an oil field distribution line. The harmonic current content at the feeder outlet of the oil field distribution line is minimized, the harmonic current of the whole line is optimized and configured by using the conventional APF equipment, the harmonic current content at the nonlinear load end is reduced, and the harmonic current content at the feeder outlet of the oil field distribution line is reduced as much as possible. The method comprises the steps of firstly determining the distribution condition of each APF device in an oil field distribution network, and dividing the oil field distribution network into a load end with the APF devices installed on the line and a load end without the APF devices installed on the line; and then determining the equivalent harmonic current output amplitude of the load end of the circuit to be adjusted, which is provided with APF equipment, by taking the minimum harmonic current content at the outlet of the feeder line of the distribution circuit in the oil field as a target.
Description
Technical Field
The invention belongs to the technical field of optimization of oil field distribution lines, and particularly relates to an APF (automatic power factor) coordination optimization adjustment method for an oil field distribution line.
Background
In the process of oil field distribution network, the number of nonlinear loads and various power electronic devices is increasing, and the problem of harmonic pollution is getting worse. In order to solve the above problem of harmonic pollution, a Filter device, which is an Active Power Filter (APF), is often used by a technician. In a conventional passive filter device, the APF may detect and extract a harmonic component from a compensation object, and input the harmonic component as a control signal to the compensation device; the main circuit of the compensation device generates a compensation current with the same size and opposite polarity with the harmonic component according to the signal, thereby ensuring that the power supply current of the power supply only contains the fundamental component. However, as the inventor further researches, the performance of the existing APF device in an oil field distribution network is not satisfactory. The installation of the APF device is realized by most technicians in a local compensation mode, namely, the APF is installed on the nonlinear load side, and only the harmonic wave of the branch line is compensated, but not the whole system of the oilfield distribution line; and with the continuous improvement of the nonlinear load capacity in the power distribution network, the total capacity of the APF devices dispersedly installed on the line is very limited, and the requirement of a power system on harmonic compensation cannot be met, so that a line feeder line contains large harmonic current, the line is polluted by large harmonic, and other associated lines generate large background harmonic. Therefore, how to realize the optimization and adjustment of the APF device connected with the load end in parallel is realized, the harmonic content of the nonlinear load end is reduced, and the harmonic current content of the feeder line is reduced as much as possible, so that the method has important significance for reducing equipment investment and improving the economic benefit of a power system.
Disclosure of Invention
The invention provides an oil field distribution line APF coordination optimization adjusting method, which aims at minimizing the harmonic current content at an outlet of a feeder line of an oil field distribution line, realizes the harmonic current optimization configuration of the whole line by utilizing the existing APF equipment, reduces the harmonic current content at a nonlinear load end, and simultaneously reduces the harmonic current content at the outlet of the feeder line of the oil field distribution line as far as possible.
In order to solve the technical problems, the invention adopts the following technical scheme:
an APF (automatic Power distribution) coordination optimization adjusting method for an oil field distribution line can be specifically described as follows:
determining the distribution condition of each APF device in the oil field power distribution network, and dividing the oil field power distribution network into a load end with the APF devices installed on a line and a load end without the APF devices installed on the line;
defining the harmonic current at the outlet of the feeder of the oil field distribution line as I0；
I0Satisfies the following conditions:
wherein, I0The detection result is obtained by an oil field electric energy quality detection system; hmIs I0The magnitude of the current of (a) is,
is I0The current phase angle of (d);
defining I equivalent harmonic current of load end without APF equipment on the line1；
I1Satisfies the following conditions:
wherein Hm1Is I1The magnitude of the current of (a) is,
is I1The current phase angle of (d);
defining I equivalent harmonic current of load end with APF equipment on line2；
I2Satisfies the following conditions:
wherein, I2The detection result is obtained by an APF equipment quality detection system; hm2Is I2The magnitude of the current of (a) is,
is I2The current phase angle of (d);
I0、I1、I2also satisfies the following conditions:
wherein,
for harmonic currents I0The vector of (a);
is equivalent harmonic current I1The vector of (a);
is equivalent harmonic current I2The vector of (a);
from equation (1) -equation (4), it is calculated:
from equation (5) -equation (6), it is calculated:
according to the formula (5) -formula (8), the harmonic current content H 'at the feeder outlet of the oilfield distribution line can be calculated'mEquivalent harmonic current amplitude H of load end with APF equipment on linem2Satisfies the following conditions:
according to formula (9), | H'mH corresponding to the minimum value of |m2A value; the Hm2The value is the equivalent harmonic current output amplitude of the load end of the line to be adjusted, which is provided with the APF equipment, when the minimum harmonic current content at the outlet of the feeder line of the oil field distribution line is taken as the target of the APF coordination optimization adjustment method.
Preferably, in the process of adjusting the equivalent harmonic current output amplitude of the load end with APF equipment on the line, the phase difference between the harmonic current phase of the APF equipment and the harmonic current phase at the feeder outlet of the oilfield distribution line is used as a first priority adjustment level within the output limit allowable range of each APF equipment, and the APF equipment is optimally adjusted one by one according to the arrangement sequence of the phase differences from small to large.
Preferably, in the process of adjusting the equivalent harmonic current output amplitude of the load end on which the APF device is installed on the line, within the output limit allowable range of each APF device, the product of the output current of the APF device and the electrical distance between the APF device and the feeder outlet of the oilfield distribution line is used as a second priority adjustment level: and according to the arrangement sequence of products from small to large, optimizing and adjusting each APF device one by one.
Preferably, in the process of adjusting the equivalent harmonic current output amplitude of the load end on which the APF devices are installed on the line, within the output limit allowable range of each APF device, the actual output value of the APF device is taken as a third priority adjustment stage: and according to the arrangement sequence of the actual output values from small to large, the optimization adjustment of each APF device is realized one by one.
Further preferably, the output limit of each APF device includes a capacity limit of each APF device and a maximum harmonic current value allowed by a line on which the APF device is installed.
The invention provides an oil field distribution line APF coordination optimization adjusting method, which comprises the steps of firstly determining the distribution condition of each APF device in an oil field distribution network, and dividing the oil field distribution network into a load end with the APF device installed on the line and a load end without the APF device installed on the line; and then determining the equivalent harmonic current output amplitude of the load end of the circuit to be adjusted, which is provided with APF equipment, by taking the minimum harmonic current content at the outlet of the feeder line of the distribution circuit in the oil field as a target. The method for adjusting the coordination optimization of the APF of the oilfield distribution line can be directly used in the existing oilfield distribution network containing the APF equipment, so that the harmonic current content at the outlet of the feeder line of the oilfield distribution line is effectively reduced within the output limit allowable range of each APF equipment.
Drawings
Fig. 1 is a schematic diagram of an equivalent structure of an oil field distribution line used in the method for adjusting the oil field distribution line APF coordination optimization according to the present invention.
Detailed Description
The invention provides an oil field distribution line APF coordination optimization adjusting method, which aims at minimizing the harmonic current content at an outlet of a feeder line of an oil field distribution line, realizes the harmonic current optimization configuration of the whole line by utilizing the existing APF equipment, reduces the harmonic current content at a nonlinear load end, and simultaneously reduces the harmonic current content at the outlet of the feeder line of the oil field distribution line as far as possible.
The method for coordinating, optimizing and adjusting the APF of the oil field distribution line provided by the invention can be specifically described as follows: firstly, the distribution condition of each APF device in the oil field power distribution network is determined. As shown in fig. 1, the oilfield distribution network is divided into a load side with APF devices installed on the lines and a load side without APF devices installed on the lines. Wherein, Load1Load end for indicating APF equipment installed on line2For indicating the load side of the line without APF equipment installed, and PCC for indicating the feeder outlet of the oilfield distribution line(the feeder exits are further connectable to bus points).
After the distribution condition of each APF device in the oil field distribution network is determined, the equivalent harmonic current output amplitude of a load end provided with the APF device on the line is adjusted by further taking the minimum harmonic current content at the outlet of a feeder line of the oil field distribution network as a target. Specifically, the harmonic current at the outlet of the feeder of the oilfield distribution line is defined as I0；
I0Satisfies the following conditions:
wherein, I0The detection result is obtained by an oil field electric energy quality detection system; hmIs I0The magnitude of the current of (a) is,
is I0The current phase angle of (d);
defining I equivalent harmonic current of load end without APF equipment on the line1；
I1Satisfies the following conditions:
wherein Hm1Is I1The magnitude of the current of (a) is,
is I1The current phase angle of (d);
defining I equivalent harmonic current of load end with APF equipment on line2；
I2Satisfies the following conditions:
wherein, I2The detection result is obtained by an APF equipment quality detection system; hm2Is I2The magnitude of the current of (a) is,
is I2The current phase angle of (d);
I0、I1、I2also satisfies the following conditions:
wherein,
for harmonic currents I0The vector of (a);
is equivalent harmonic current I1The vector of (a);
is equivalent harmonic current I2The vector of (a);
from equation (1) -equation (4), it is calculated:
from equation (5) -equation (6), it is calculated:
according to the formula (5) -formula (8), the harmonic of the feeder outlet of the oilfield distribution line is calculated
'
Wave current content HmEquivalent harmonic of load end with APF equipment installed on lineWave current amplitude Hm2Satisfies the following conditions:
it is noted that the problem can also be understood as finding | f (H'm)|2Is measured. Wherein, further developing the formula (9) can obtain:
namely:
from this, g (H'm)＝|f(H'm)|2The minimum point of not less than 0 is
H corresponding tom2. Thus, the equivalent harmonic current output amplitude of the load end of the circuit to be adjusted, which is provided with the APF equipment, is obtained when the minimum harmonic current content at the outlet of the feeder line of the distribution circuit in the oil field is taken as the target.
In a preferred embodiment of the present invention, in the process of adjusting the output amplitude of the equivalent harmonic current at the load end where the APF devices are installed on the line, the APF devices are optimally adjusted in the following order of priority within the output limit allowable range of each APF device.
One is as follows: and (3) taking the phase difference between the harmonic current phase of the APF equipment and the harmonic current phase at the feeder outlet of the distribution line of the oil field as a first priority adjustment level, and realizing the optimization adjustment of the APF equipment one by one according to the sequence of the phase differences from small to large.
The second step is as follows: taking the product of the output current of the APF device and the electrical distance between the APF device and the feeder outlet of the oilfield distribution line as a second priority adjustment level: and according to the arrangement sequence of products from small to large, optimizing and adjusting each APF device one by one.
And thirdly: taking the actual output value of the APF equipment as a third priority adjustment level: and according to the arrangement sequence of the actual output values from small to large, the optimization adjustment of each APF device is realized one by one.
It should be noted that, in the process of optimally adjusting each APF device according to the priority adjustment level, the APF device needs to meet the two limitations: 1. capacity limit of each APF device; 2. the maximum harmonic current value allowed by the line on which the APF device is installed. Taking the maximum harmonic current value allowed by the line on which the APF device is installed as an example, assuming that the maximum harmonic content of a branch line of a certain 6kV line does not exceed 4% of the branch line, the relationship formula between the harmonic current content at the feeder outlet of the oilfield distribution line and the equivalent harmonic current amplitude of the load end on which the APF device is installed becomes:
||4％Hm20|-|Hm2||≤ΔH'm2≤|2×4％Hm20-Hm2|
at this time, | H'm2-Hm2|≤ΔH'm2Then, the minimum value point can be obtained, whose value is
If H'm2-Hm2|＞ΔH'm2If the minimum value point is | f (H'm-ΔH'm2) The minimum point in i.
The invention provides an oil field distribution line APF coordination optimization adjusting method, which comprises the steps of firstly determining the distribution condition of each APF device in an oil field distribution network, and dividing the oil field distribution network into a load end with the APF device installed on the line and a load end without the APF device installed on the line; and then determining the equivalent harmonic current output amplitude of the load end of the circuit to be adjusted, which is provided with APF equipment, by taking the minimum harmonic current content at the outlet of the feeder line of the distribution circuit in the oil field as a target. The method for adjusting the coordination optimization of the APF of the oilfield distribution line can be directly used in the existing oilfield distribution network containing the APF equipment, so that the harmonic current content at the outlet of the feeder line of the oilfield distribution line is effectively reduced within the output limit allowable range of each APF equipment.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (5)
1. The method for adjusting the APF coordination optimization of the oil field distribution line is characterized by specifically describing as follows:
determining the distribution condition of each APF device in the oil field power distribution network, and dividing the oil field power distribution network into a load end with the APF devices installed on a line and a load end without the APF devices installed on the line;
defining the harmonic current at the outlet of the feeder of the oil field distribution line as I0；
I0Satisfies the following conditions:
wherein, I0The detection result is obtained by an oil field electric energy quality detection system; hmIs I0The magnitude of the current of (a) is,
is I0The current phase angle of (d);
defining I equivalent harmonic current of load end without APF equipment on the line1；
I1Satisfies the following conditions:
wherein Hm1Is I1The magnitude of the current of (a) is,
is I1The current phase angle of (d);
defining I equivalent harmonic current of load end with APF equipment on line2；
I2Satisfies the following conditions:
wherein, I2The detection result is obtained by an APF equipment quality detection system; hm2Is I2The magnitude of the current of (a) is,
is I2The current phase angle of (d);
I0、I1、I2also satisfies the following conditions:
wherein,
for harmonic currents I0The vector of (a);
is equivalent harmonic current I1The vector of (a);
is equivalent harmonic current I2The vector of (a);
from equation (1) -equation (4), it is calculated:
from equation (5) -equation (6), it is calculated:
according to the formula (5) -formula (8), the harmonic current content H 'at the feeder outlet of the oilfield distribution line can be calculated'mEquivalent harmonic current amplitude H of load end with APF equipment on linem2Satisfies the following conditions:
according to formula (9), | H'mH corresponding to the minimum value of |m2A value; the Hm2The value is the equivalent harmonic current output amplitude of the load end of the line to be adjusted, which is provided with the APF equipment, when the minimum harmonic current content at the outlet of the feeder line of the oil field distribution line is taken as the target of the APF coordination optimization adjustment method.
2. The method for adjusting the APF coordination optimization of the oilfield distribution line according to the claim 1 is characterized in that in the process of adjusting the equivalent harmonic current output amplitude of the load end of the line provided with the APF equipment, the phase difference between the harmonic current phase of the APF equipment and the harmonic current phase at the feed line outlet of the oilfield distribution line is used as a first priority adjustment level within the output limit allowable range of each APF equipment, and the APF equipment is optimized and adjusted one by one according to the arrangement sequence of the phase differences from small to large.
3. The method for adjusting the coordination optimization of the APF of the oilfield distribution line according to claim 1, wherein in the process of adjusting the output amplitude of the equivalent harmonic current of the load end of the line on which the APF equipment is installed, the product of the output current of the APF equipment and the electrical distance between the APF equipment and the feeder outlet of the oilfield distribution line is used as a second priority adjustment level within the output limit allowable range of each APF equipment: and according to the arrangement sequence of products from small to large, optimizing and adjusting each APF device one by one.
4. The method for adjusting the coordination optimization of the APF of the oilfield distribution line according to the claim 1, wherein in the process of adjusting the output amplitude of the equivalent harmonic current of the load end of the line on which the APF equipment is installed, the actual output value of the APF equipment is taken as a third priority adjustment stage within the output limit allowable range of each APF equipment: and according to the arrangement sequence of the actual output values from small to large, the optimization adjustment of each APF device is realized one by one.
5. The method for adjusting the coordination optimization of the APF of the oilfield distribution line according to any one of claims 2 to 4, wherein the output limit of each APF device comprises a capacity limit of each APF device and a maximum harmonic current value allowed by a line on which the APF device is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010166868.4A CN111327060B (en) | 2020-03-11 | 2020-03-11 | APF (active Power Filter) coordinated optimization and adjustment method for distribution line in oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010166868.4A CN111327060B (en) | 2020-03-11 | 2020-03-11 | APF (active Power Filter) coordinated optimization and adjustment method for distribution line in oil field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111327060A CN111327060A (en) | 2020-06-23 |
| CN111327060B true CN111327060B (en) | 2022-03-22 |
Family
ID=71173287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010166868.4A Active CN111327060B (en) | 2020-03-11 | 2020-03-11 | APF (active Power Filter) coordinated optimization and adjustment method for distribution line in oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111327060B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015103909A1 (en) * | 2014-01-08 | 2015-07-16 | 国家电网公司 | Device applied to coordination control over svg and apf |
| US9473042B1 (en) * | 2014-03-17 | 2016-10-18 | Board Of Regents, The University Of Texas System | Grid active power filters using cascaded multilevel inverters with switching angle control |
| CN107706915A (en) * | 2017-10-11 | 2018-02-16 | 燕山大学 | A kind of global optimization administering method for solving scattered harmonic source active distribution network harmonic wave |
| CN110601196A (en) * | 2019-09-17 | 2019-12-20 | 中南大学 | Optimal installation point selection method for active filter in power distribution network |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6657322B2 (en) * | 2001-10-01 | 2003-12-02 | Rockwell Automation Technologies, Inc. | Control system for active power filters |
-
2020
- 2020-03-11 CN CN202010166868.4A patent/CN111327060B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015103909A1 (en) * | 2014-01-08 | 2015-07-16 | 国家电网公司 | Device applied to coordination control over svg and apf |
| US9473042B1 (en) * | 2014-03-17 | 2016-10-18 | Board Of Regents, The University Of Texas System | Grid active power filters using cascaded multilevel inverters with switching angle control |
| CN107706915A (en) * | 2017-10-11 | 2018-02-16 | 燕山大学 | A kind of global optimization administering method for solving scattered harmonic source active distribution network harmonic wave |
| CN110601196A (en) * | 2019-09-17 | 2019-12-20 | 中南大学 | Optimal installation point selection method for active filter in power distribution network |
Non-Patent Citations (5)
| Title |
|---|
| 分布式电力系统谐波的治理;唐忠;《上海电力学院学报》;20131015(第05期);全文 * |
| 多APF的配电线路谐波补偿优化调度方法;刘云等;《中国电力》;20170105(第01期);全文 * |
| 多馈线型低压配电网分布式谐波治理的优化控制;朱国锋等;《电工技术学报》;20160510(第09期);全文 * |
| 并联双APF交互影响分析;陈继开等;《电网技术》;20170331(第03期);全文 * |
| 应用多级有源滤波系统的分布式电源谐波治理;吴昊等;《浙江电力》;20200116(第01期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111327060A (en) | 2020-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9444253B2 (en) | Paralleling of active filters with independent controls | |
| SE515107C2 (en) | Reactive power compensation method and apparatus | |
| CN105140927B (en) | The computational methods of distribution network var compensation condenser capacity containing harmonic wave | |
| Marei et al. | PV interface system with LVRT capability based on a current controlled HFAC link converter | |
| CN111327060B (en) | APF (active Power Filter) coordinated optimization and adjustment method for distribution line in oil field | |
| Hosseini | The operation and model of UPQC in voltage sag mitigation using EMTP by direct method | |
| Khaskheli et al. | Power quality improvement in power system network using unified power flow controller | |
| Abramovich et al. | Shunt active correction system analysis in conditions of industrial enterprises networks | |
| EP1484833B1 (en) | Method and apparatus to reduce distortion of currents feeding an AC/DC rectifier system | |
| EP3200301B1 (en) | Resonance suppression device and resonance suppression method | |
| CN108134397A (en) | A kind of reactive automatic compensating method based on centralized photovoltaic DC-to-AC converter | |
| CN108599166A (en) | A kind of dynamic passive compensation harmonic suppression apparatus and control method | |
| Vishnuvardhan et al. | Neuro-fuzzy controller and bias voltage generator aided UPQC for power quality maintenance | |
| CN113346511A (en) | Correction method for reactive power compensation | |
| KR102681488B1 (en) | Apparatus for suppressing ac induced voltage of mmc-hvdc system and method thereof | |
| Gavrilovic et al. | The filter-compensation device applications to the AC 25 kV 50 Hz AC of Serbian Railways | |
| Hooshmand et al. | Optimal design of TCR/FC in electric arc furnaces for power quality improvement in power systems | |
| Tarnini et al. | Analytical estimation in APF sizing for networks of analogous loads (Estimation of overall THD) | |
| JP2004320860A (en) | Reactive power compensator | |
| JP6879652B1 (en) | Self-excited electrostatic compensator | |
| Ghulbet et al. | An Investigation on Harmonic Problems for N-1 Contingency in Industrial Distribution and Its Mitigation Using Fuzzy Controlled Hybrid Filter | |
| Rohouma et al. | Voltage profile enhancement using capacitor-less D-STATCOM to increase PV integration in distribution network under transient cloud conditions | |
| Al-Badi et al. | Designing of filter to reduce harmonic in industrial power networks | |
| Kyaw | Power Quality Improvement, Load Balancing | |
| Evseev et al. | A New Way to Control a Static Synchronous Series Compensator Using the Parameters of an Electric Arc Furnace Equivalent Circuit |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |