CN104535820A - Three-phase active power filter harmonic current detection method based on FBD method - Google Patents
Three-phase active power filter harmonic current detection method based on FBD method Download PDFInfo
- Publication number
- CN104535820A CN104535820A CN201410806881.6A CN201410806881A CN104535820A CN 104535820 A CN104535820 A CN 104535820A CN 201410806881 A CN201410806881 A CN 201410806881A CN 104535820 A CN104535820 A CN 104535820A
- Authority
- CN
- China
- Prior art keywords
- current
- phase
- formula
- fundamental
- harmonic
- 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
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a three-phase active power filter harmonic current detection method based on an FBD method. The FBD method is correspondingly deduced and thoroughly researched, and the three-phase three-wire system current detection method based on FBD fundamental wave active currents, fundamental wave reactive currents, harmonic currents, fundamental wave negative-sequence currents and any subharmonic currents is put forward. The method essentially means projection transformation, the detection result is decided by reference voltages, a detected current is always identical with the reference voltages in waveform and phase, different reference voltages are generated according to needs so that different current components can be detected, and the application range and field of the FBD method are greatly widened; meanwhile, the FBD method is very visual, 3/2 conversion is not needed, the algorithm is simple, the calculated quantity is small, and the FBD method can be applied to a three-phase system and a non-three-phase system as well. The simulation result proves correctness and feasibility of the proposed harmonic current detection method, and the harmonic current detection method can be used for compensation and control of harmonic waves and reactive power of APFs.
Description
Technical field
The invention belongs to technical field of electric power detection, specifically a kind of three phase active electric power filter harmonic current detecting method based on FBD method.
Background technology
In recent years, because nonlinear load (as rectifier, frequency converter etc.) comes into operation in a large number, cause the quality of power supply of user side day by day serious, wherein based on harmonic pollution.Along with the propelling that intelligent grid is built, various distributed power source (as low profile photovoltaic/photo-thermal power generation, small-size wind power-generating), energy storage device (as lithium battery group, lead-acid batteries etc.) and electric automobile charging station start to occur, when these equipment are incorporated into the power networks, also bring certain harmonic effects to electrical network.
Because mains by harmonics is subject to the impact of randomness, distributivity and the factor such as non-stationary, be difficult to carry out synchronously accurately measuring to it.The reference current real time detection algorithm of Active Power Filter-APF (APF) has important impact to its compensation performance, first accurately must detect the harmonic component in various situation.Therefore how detecting that the harmonic component in electrical network is the Important Problems studied quickly and easily, the present invention is studied based on the three phase active electric power filter harmonic current detecting method of FBD method based on FBD method.Chinese scholars has also carried out large quantifier elimination to the detection of harmonic current.At present, conventional detection method has the detection method of analog filter detection method, instantaneous reactive power theory, the detection method of discrete Fourier transformation (DFT), the adaptive detective method of the principle that to disappear in vain based on adaptive disturbance and Fryze Power Theory detection method.Analog filter method metrical error is large, especially obvious during mains frequency change; Responsive to circuit element parameter; Idle and the real component in fundamental current cannot be isolated.
Early 1980s, the three-phase instantaneous reactive power theory that the people such as Japanese scholars H.Akagi propose, can regard the special case of FBD method as, but wherein comprises Park conversion, d_q conversion and inverse transformation thereof, algorithm still more complicated, makes it in application, have limitation.DFR and adaptive detective method, computation delay is long, is difficult to realize real-time control.Fryze power is defined in average power in theory, the method of tradition average power is obtained by the integration of one-period data, bring larger time delay can to like this detection of instantaneous reactive current, this just can not meet the demands for the occasion that requirement of real-time is high, be unsuitable for load and change occasion frequently, and harmonic and reactive currents can only be detected simultaneously, can not only detect harmonic wave or reactive current.1979, M.Depenbrock proposed a kind of power analysis method being suitable for various needs.The Power Theory that this method proposed in 1932 based on Fryze and the improvement made of F.Buchholz thereafter, be therefore called as FBD (Fryze-Buchholz-Dpenbrock) method.The basic thought of FBD method is proposed in 1932 by German scholar S.Fryze, the definition of wherein each item is all single-phase, after update through people such as F.Buchholz and M.Dpenbrock, it is extended to general multiphase system, and some of them definition is revised, form system gradually.
Summary of the invention
The object of the present invention is to provide a kind of in calculated amount, do not have the process of complicated matrixing, principle realization is simple, real-time is good, is applicable to the three phase active electric power filter harmonic current detecting method based on FBD method that is single-phase and multiphase system.
For achieving the above object, the invention provides following technical scheme:
Based on a three phase active electric power filter harmonic current detecting method for FBD method, be first desired electrical guiding element the load equivalent in side circuit, think that the power in circuit all consumes in this equivalent conductance, and there is no the loss of energy; According to equivalent conductance to Current Decomposition, calculate the current component needing to compensate; Phase three-wire three APF needs to detect threephase load electric current in real time, FBD method is utilized to isolate fundamental active component and idle component, deduct fundametal compoment with load current and just can obtain harmonic current, namely reference current signal is obtained, make actual inverter current trace command electric current by controlling driving switch, thus realize harmonics restraint.
As the further scheme of the present invention: in phase three-wire three circuit, voltage-phase, the current phase of a, b, c three-phase differ 120 ° successively; If the supply voltage of three-phase circuit is undistorted, make active voltage u
psee formula (1):
Make the reactive voltage u of three-phase circuit
qas shown in formula (2):
If the load current i of three-phase circuit is shown in formula (3):
Then meritorious equivalent conductance G
pt () sees formula (4):
Idle equivalent conductance G
qt () sees formula (5):
After low-pass filter (LPF), obtain linear equivalence conductance and idle equivalent conductance is shown in formula (6) and formula (7) respectively:
Formula (in (6), I
pfor the mean value of each phase fundamental active current, its expression formula is shown in formula (8);
In formula (7), I
qfor the mean value of each phase fundamental reactive current, its expression formula is shown in formula (9):
The current component of the actual acting of each circuitry phase linear parts, namely fundamental active current component is shown in formula (10):
The instantaneous reactive current that each circuitry phase linear parts produces, namely fundamental reactive current component is shown in formula (11):
As long as after the fundamental active current that detected respectively in load current and fundamental reactive current component, the harmonic current components in load current just can be obtained; From formula (10) and formula (11), in the final expression formula of fundamental active current and fundamental reactive current, only use the phase place of supply voltage, have nothing to do with the amplitude of supply voltage; Therefore, in the process of current detecting, generate reference voltage synchronous with power supply fundamental voltage with phaselocked loop, in computation process, replace actual supply voltage, accurately detect the harmonic current of three-phase circuit.
The method because only used the phase signal of supply voltage in harmonic current detection, there is not the amplitude signal of supply voltage, so when distortion occurs supply voltage, still accurately can detect harmonic current.So as the further scheme of the present invention: utilize PLL phaselocked loop to obtain the phase signal of line voltage; Utilize LPF low-pass filter to obtain G
p(t), G
qthe DC component G of (t)
p, G
q.
As the further scheme of the present invention: produce different reference voltages as required, detect different current components, comprise fundamental active current, fundamental reactive current, harmonic current, fundamental negative sequence current and Random Harmonic Current.
As the further scheme of the present invention: because forward-order current and negative-sequence current have same characteristic, and artificial difference to be the sense of rotation in space contrary, therefore can use to ask for fundamental positive sequence current methods and ask for fundamental negative sequence current; Thus the b phase of three-phase reference voltage and c phase transposition, thus obtain the reference voltage asking for negative-sequence current, u
a, u
b, u
cutilize negative phase-sequence reference voltage, ask for fundamental negative sequence current.
As the further scheme of the present invention: utilize symmetrical component method, load current is decomposed into positive-sequence component group and negative sequence component group, sees formula (12):
The reference voltage of gaining merit of the first-harmonic negative phase-sequence in formula (12) is used to calculate equivalent conductance and see formula (13):
After low-pass filter, obtain linear equivalence conductance and see formula (14):
Then first-harmonic negative phase-sequence active current is shown in formula (15):
In like manner obtain, first-harmonic negative phase-sequence reactive current component is shown in formula (16):
Just fundamental negative sequence current component can be obtained by formula (15), formula (16).
As the further scheme of the present invention: for detecting k subharmonic current, PLL circuit is utilized to produce k subharmonic reference voltage; Gain merit reference voltage and idle reference voltage of k subharmonic is shown in formula (17), formula (18) respectively:
。
Compared with prior art, the invention has the beneficial effects as follows:
The Cleaning Principle of fundamental active current and fundamental reactive current, harmonic current, fundamental negative sequence current and Random Harmonic Current etc. should be analyzed based on the three phase active electric power filter harmonic current detecting method of FBD method.The method adopts phaselocked loop to produce reference voltage, projected to by load current on reference voltage, can accurately detect various current component by low-pass filter, and in line voltage distortion situation, the method is applicable equally.Matlab/Simulink simulation result confirms correctness and the validity of the method.
Accompanying drawing explanation
Fig. 1 is three-phase circuit harmonic current detecting method schematic diagram;
Fig. 2 is that supply voltage is without load current waveform during rugged change;
Fig. 3 is that supply voltage is without detection harmonic current waveforms during rugged change;
Fig. 4 is that supply voltage is without detection fundamental current waveform during rugged change;
Fig. 5 be power electric be pressed with rugged become time mains voltage waveform;
Fig. 6 be power electric be pressed with rugged become time load current waveform;
Fig. 7 be power electric be pressed with rugged become time detection harmonic current waveforms;
Fig. 8 be power electric be pressed with rugged become time detection fundamental current waveform;
Fig. 9 is the load current waveform of load when changing suddenly;
Figure 10 is the detection harmonic current waveforms of load when changing suddenly;
Figure 11 is the detection fundamental current waveform of load when changing suddenly;
Load current waveform when Figure 12 is laod unbalance;
Detection fundamental positive sequence current waveform when Figure 13 is laod unbalance;
Detection fundamental negative sequence current waveform when Figure 14 is laod unbalance;
Detection harmonic current waveforms when Figure 15 is laod unbalance;
Figure 16 be supply voltage undistorted time single harmonic current testing result.
Embodiment
Be described in more detail below in conjunction with the technical scheme of embodiment to this patent.
Based on a three phase active electric power filter harmonic current detecting method for FBD method, be first desired electrical guiding element the load equivalent in side circuit, think that the power in circuit all consumes in this equivalent conductance, and there is no the loss of energy.According to equivalent conductance to Current Decomposition, the current component needing to compensate can be calculated.
Complicated coordinate transform is not had in FBD algorithm, real-time current detection can be carried out rapidly, especially detect the fundamental active current of three-phase current, fundamental reactive current, harmonic current, fundamental negative sequence current and Random Harmonic Current when system, voltage distortion.
Phase three-wire three APF needs to detect threephase load electric current in real time, FBD method can be utilized to isolate fundamental active component and idle component, deduct fundametal compoment with load current and just can obtain harmonic current, namely reference current signal is obtained, make actual inverter current trace command electric current by controlling driving switch, thus realize harmonics restraint.
In three-phase circuit, voltage-phase, the current phase of a, b, c three-phase differ 120 ° successively.If the supply voltage of three-phase circuit is undistorted, make active voltage u
psee formula (1):
Make the reactive voltage u of three-phase circuit
qas shown in formula (2):
If the load current i of three-phase circuit is shown in formula (3):
Then meritorious equivalent conductance G
pt () sees formula (4):
Idle equivalent conductance G
qt () sees formula (5):
After low-pass filter (LPF), obtain linear equivalence conductance and idle equivalent conductance is shown in formula (6) and formula (7) respectively:
Formula (in (6), I
pfor the mean value of each phase fundamental active current, its expression formula is shown in formula (8);
In formula (7), I
qfor the mean value of each phase fundamental reactive current, its expression formula is shown in formula (9):
The current component of the actual acting of each circuitry phase linear parts, namely fundamental active current component is shown in formula (10):
The instantaneous reactive current that each circuitry phase linear parts produces, namely fundamental reactive current component is shown in formula (11):
As long as after the fundamental active current that detected respectively in load current and fundamental reactive current component, the harmonic current components in load current just can be obtained.As can be seen from formula (10) and formula (11), in the final expression formula of fundamental active current and fundamental reactive current, only use the phase place of supply voltage, have nothing to do with the amplitude of supply voltage.Therefore, in the process of current detecting, reference voltage synchronous with power supply fundamental voltage can be generated with phaselocked loop (PLL), in computation process, replace actual supply voltage, accurately can detect the harmonic current of three-phase circuit, Cleaning Principle block diagram as shown in Figure 1.
In FIG, PLL is phaselocked loop, is used for obtaining the phase signal of line voltage; LPF is low-pass filter, is used for obtaining G
p(t), G
qthe DC component G of (t)
p, G
q.The method because only used the phase signal of supply voltage in harmonic current detection, there is not the amplitude signal of supply voltage, so when distortion occurs supply voltage, still accurately can detect harmonic current.
FBD method is in fact a kind of projective transformation, and its testing result is determined by reference voltage.Produce different reference voltages as required, just can detect different current components, comprise fundamental active current, fundamental reactive current, harmonic current, fundamental negative sequence current and Random Harmonic Current etc.For three-phase circuit, the detection method of concrete discussion fundamental negative sequence current component and Random Harmonic Current component, wherein the detection method of Random Harmonic Current component is equally applicable to single-phase circuit and four circuitry phases, and the detection method of fundamental negative sequence current component is also applicable to four circuitry phases.
Because forward-order current and negative-sequence current have same characteristic, and artificial difference to be the sense of rotation in space contrary, therefore can use to ask for fundamental positive sequence current methods and ask for fundamental negative sequence current.Thus the b phase of three-phase reference voltage and c phase transposition, thus obtain the reference voltage asking for negative-sequence current, u
a, u
b, u
cutilize negative phase-sequence reference voltage, ask for fundamental negative sequence current.
Utilize symmetrical component method, load current can be decomposed into positive-sequence component group and negative sequence component group (consider the situation of three-phase three-wire system, do not have zero-sequence component), see formula (12):
The reference voltage of gaining merit of the first-harmonic negative phase-sequence in formula (12) is used equivalent conductance can be calculated to see formula (13):
After low-pass filter, obtain linear equivalence conductance and see formula (14):
Then first-harmonic negative phase-sequence active current is shown in formula (15):
In like manner can obtain, first-harmonic negative phase-sequence reactive current component is shown in formula (16):
Just fundamental negative sequence current component can be obtained by formula (15), formula (16).
In sum, for detecting certain (as k time) harmonic current, PLL circuit is utilized to produce k subharmonic reference voltage.Gain merit reference voltage and idle reference voltage of k subharmonic is shown in formula (17), formula (18) respectively:
Fundamental positive sequence current detecting is in fact a special case of Random harmonic current detection, and as k=1, testing result is fundamental positive sequence electric current.
In order to prove technique effect of the present invention, adopt following simulation result and analysis:
In order to check correctness and the feasibility of detection method, Matlab/Simulink carries out simulating, verifying.
Simulation parameter is as follows: power supply is 380V, and frequency is 50Hz; Harmonic source is three phase rectifier device, and wherein Inductor is 3mH, and resistance is 2 Ω.
Devise the emulation experiment under 4 kinds of different conditions:
(1) supply voltage is undistorted;
(2) supply voltage distortion: containing 5,7 and 13 subharmonic voltage components in supply voltage;
(3) load is undergone mutation: after 50ms, and load increases suddenly and is twice;
(4) laod unbalance: a, b phase cross-over connection 10S2 ohmic load;
(5) supply voltage does not distort, and detects the harmonic current components of single.
Simulation result is as shown in Fig. 2-16.
From Fig. 2-4, when supply voltage is undistorted, the harmonic current detecting method based on FBD method can detect fundamental current and the harmonic current components of load current exactly; Any subharmonic algorithm based on FBD method also can detect a certain subharmonic current component of load current exactly.From Fig. 5-8, when distortion occurs supply voltage, the harmonic current detecting method based on FBD method still can detect fundamental current and the harmonic current components of load current exactly, and testing result is not by the impact of power supply voltage distortion.From Fig. 9-11, when load is undergone mutation, there is certain hysteresis phenomenon when following the tracks of load dynamic change in the harmonic current detecting method based on FBD method, this is because the inherent delay of LPF causes, approximately need the time of 20ms, the change of load can be followed the tracks of.From Figure 12-16, when laod unbalance, load current is made up of three parts: fundamental positive sequence current component, fundamental negative sequence current component and harmonic current components.Adopt the harmonic current detecting method based on FBD method promoted can detect the various current components of load current exactly.In sum, the method that the present invention proposes all can accurately detect various current component under several groups of typical emulation experiments, demonstrates this algorithm and has rapid dynamic response speed, and accuracy of detection is high and realize simple feature.The correctness of the harmonic current detecting method that simulation results show proposes and validity.
The present invention has carried out corresponding derivation and deep research to FBD method, proposes the three-phase three-line system electric current detecting method based on FBD fundamental active current, fundamental reactive current, harmonic current, fundamental negative sequence current and Random Harmonic Current.The method is in fact a kind of projective transformation, testing result is decided by reference voltage, the electric current detected all the time identical with reference voltage waveform, phase place is identical, produce different reference voltages as required, just different current components be can detect, range of application and the field of FBD method greatly expanded; FBD method is very directly perceived simultaneously, and without the need to 3/2 conversion, algorithm is simple, calculated amount is less, can be applied to three-phase system, also can be applied to non-three-phase system.The correctness of the harmonic current detecting method that simulation results show proposes and feasibility, can be used for the harmonic wave of APF and the Compensation andcontrol of reactive power.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art possesses, can also makes a variety of changes under the prerequisite not departing from this patent aim.
Claims (8)
1. the three phase active electric power filter harmonic current detecting method based on FBD method, it is characterized in that, first be desired electrical guiding element the load equivalent in side circuit, think that the power in circuit all consumes in this equivalent conductance, and there is no the loss of energy; According to equivalent conductance to Current Decomposition, calculate the current component needing to compensate; Phase three-wire three APF needs to detect threephase load electric current in real time, FBD method is utilized to isolate fundamental active component and idle component, deduct fundametal compoment with load current and just can obtain harmonic current, namely reference current signal is obtained, make actual inverter current trace command electric current by controlling driving switch, thus realize harmonics restraint.
2. the three phase active electric power filter harmonic current detecting method based on FBD method according to claim 1, is characterized in that, in phase three-wire three circuit, voltage-phase, the current phase of a, b, c three-phase differ 120 ° successively; If the supply voltage of three-phase circuit is undistorted, make active voltage u
psee formula (1):
Make the reactive voltage u of three-phase circuit
qas shown in formula (2):
If the load current i of three-phase circuit is shown in formula (3):
Then meritorious equivalent conductance G
pt () sees formula (4):
Idle equivalent conductance G
qt () sees formula (5):
After low-pass filter (LPF), obtain linear equivalence conductance and idle equivalent conductance is shown in formula (6) and formula (7) respectively:
Formula (in (6), I
pfor the mean value of each phase fundamental active current, its expression formula is shown in formula (8);
In formula (7), I
qfor the mean value of each phase fundamental reactive current, its expression formula is shown in formula (9):
The current component of the actual acting of each circuitry phase linear parts, namely fundamental active current component is shown in formula (10):
The instantaneous reactive current that each circuitry phase linear parts produces, namely fundamental reactive current component is shown in formula (11):
As long as after the fundamental active current that detected respectively in load current and fundamental reactive current component, the harmonic current components in load current just can be obtained; From formula (10) and formula (11), in the final expression formula of fundamental active current and fundamental reactive current, only use the phase place of supply voltage, have nothing to do with the amplitude of supply voltage; Therefore, in the process of current detecting, generate reference voltage synchronous with power supply fundamental voltage with phaselocked loop, in computation process, replace actual supply voltage, accurately detect the harmonic current of three-phase circuit.
3. the three phase active electric power filter harmonic current detecting method based on FBD method according to claim 2, is characterized in that, utilizes PLL phaselocked loop to obtain the phase signal of line voltage.
4. the three phase active electric power filter harmonic current detecting method based on FBD method according to claim 2, is characterized in that, utilizes LPF low-pass filter to obtain G
p(t), G
qthe DC component G of (t)
p, G
q.
5. the three phase active electric power filter harmonic current detecting method based on FBD method according to claim 2, it is characterized in that, produce different reference voltages as required, detect different current components, comprise fundamental active current, fundamental reactive current, harmonic current, fundamental negative sequence current and Random Harmonic Current.
6. the three phase active electric power filter harmonic current detecting method based on FBD method according to claim 2, it is characterized in that, because forward-order current and negative-sequence current have same characteristic, and artificial difference to be the sense of rotation in space contrary, therefore can use to ask for fundamental positive sequence current methods and ask for fundamental negative sequence current; Thus the b phase of three-phase reference voltage and c phase transposition, thus obtain the reference voltage asking for negative-sequence current, u
a, u
b, u
cutilize negative phase-sequence reference voltage, ask for fundamental negative sequence current.
7. the three phase active electric power filter harmonic current detecting method based on FBD method according to claim 2, is characterized in that, utilize symmetrical component method, and load current is decomposed into positive-sequence component group and negative sequence component group, sees formula (12):
The reference voltage of gaining merit of the first-harmonic negative phase-sequence in formula (12) is used to calculate equivalent conductance and see formula (13):
After low-pass filter, obtain linear equivalence conductance and see formula (14):
Then first-harmonic negative phase-sequence active current is shown in formula (15):
In like manner obtain, first-harmonic negative phase-sequence reactive current component is shown in formula (16):
Just fundamental negative sequence current component can be obtained by formula (15), formula (16).
8. the three phase active electric power filter harmonic current detecting method based on FBD method according to claim 7, is characterized in that, for detecting k subharmonic current, utilizes PLL circuit to produce k subharmonic reference voltage; Gain merit reference voltage and idle reference voltage of k subharmonic is shown in formula (17), formula (18) respectively:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410806881.6A CN104535820A (en) | 2014-12-22 | 2014-12-22 | Three-phase active power filter harmonic current detection method based on FBD method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410806881.6A CN104535820A (en) | 2014-12-22 | 2014-12-22 | Three-phase active power filter harmonic current detection method based on FBD method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104535820A true CN104535820A (en) | 2015-04-22 |
Family
ID=52851383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410806881.6A Pending CN104535820A (en) | 2014-12-22 | 2014-12-22 | Three-phase active power filter harmonic current detection method based on FBD method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104535820A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105140922A (en) * | 2015-09-08 | 2015-12-09 | 中国矿业大学(北京) | Three-phase active filter electric current detection algorithm based on CPC power theory |
| CN105162138A (en) * | 2015-09-11 | 2015-12-16 | 合肥工业大学 | Reactive and harmonic current rapid detection method based on voltage sequence decomposition |
| CN106505840A (en) * | 2016-11-30 | 2017-03-15 | 云南电网有限责任公司 | A kind of grid-connected photovoltaic inverter harmonic wave management method |
| CN108054763A (en) * | 2018-01-08 | 2018-05-18 | 合肥工业大学 | A kind of definite method and system of comprehensive power quality management |
| CN109406854A (en) * | 2018-10-24 | 2019-03-01 | 广东工业大学 | Harmonic wave instruction current acquisition methods, device and the equipment of single-phase active power filter |
| CN110429590A (en) * | 2019-07-24 | 2019-11-08 | 合肥科威尔电源系统股份有限公司 | A kind of harmonic wave analog control method suitable for power grid analog power |
| CN110907686A (en) * | 2019-09-16 | 2020-03-24 | 国网河南省电力公司郑州供电公司 | Distributed photovoltaic grid-connected system harmonic detection method based on FBD method |
| CN111693813A (en) * | 2020-06-22 | 2020-09-22 | 四川大学 | FBD harmonic detection method based on composite generalized integral |
| CN112398130A (en) * | 2020-11-07 | 2021-02-23 | 闽南理工学院 | Active power filter harmonic reference current extraction method based on triangular quadrature |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472282A (en) * | 2013-09-23 | 2013-12-25 | 东南大学 | Improved FBD harmonic current detection method based on adaptive principle |
-
2014
- 2014-12-22 CN CN201410806881.6A patent/CN104535820A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472282A (en) * | 2013-09-23 | 2013-12-25 | 东南大学 | Improved FBD harmonic current detection method based on adaptive principle |
Non-Patent Citations (2)
| Title |
|---|
| 卢锋 等: "基于FBD法有源电力滤波器谐波电流检测方法", 《电工电气》 * |
| 曲轶龙 等: "基于FBD法的新型谐波电流检测方法研究", 《电源技术》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105140922A (en) * | 2015-09-08 | 2015-12-09 | 中国矿业大学(北京) | Three-phase active filter electric current detection algorithm based on CPC power theory |
| CN105162138A (en) * | 2015-09-11 | 2015-12-16 | 合肥工业大学 | Reactive and harmonic current rapid detection method based on voltage sequence decomposition |
| CN106505840A (en) * | 2016-11-30 | 2017-03-15 | 云南电网有限责任公司 | A kind of grid-connected photovoltaic inverter harmonic wave management method |
| CN106505840B (en) * | 2016-11-30 | 2019-02-15 | 云南电网有限责任公司 | A kind of grid-connected photovoltaic inverter harmonic wave management method |
| CN108054763A (en) * | 2018-01-08 | 2018-05-18 | 合肥工业大学 | A kind of definite method and system of comprehensive power quality management |
| CN109406854A (en) * | 2018-10-24 | 2019-03-01 | 广东工业大学 | Harmonic wave instruction current acquisition methods, device and the equipment of single-phase active power filter |
| CN110429590A (en) * | 2019-07-24 | 2019-11-08 | 合肥科威尔电源系统股份有限公司 | A kind of harmonic wave analog control method suitable for power grid analog power |
| CN110907686A (en) * | 2019-09-16 | 2020-03-24 | 国网河南省电力公司郑州供电公司 | Distributed photovoltaic grid-connected system harmonic detection method based on FBD method |
| CN111693813A (en) * | 2020-06-22 | 2020-09-22 | 四川大学 | FBD harmonic detection method based on composite generalized integral |
| CN111693813B (en) * | 2020-06-22 | 2024-04-09 | 四川大学 | FBD harmonic detection method based on composite generalized integral |
| CN112398130A (en) * | 2020-11-07 | 2021-02-23 | 闽南理工学院 | Active power filter harmonic reference current extraction method based on triangular quadrature |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104535820A (en) | Three-phase active power filter harmonic current detection method based on FBD method | |
| Wu et al. | Sequence-impedance-based stability comparison between VSGs and traditional grid-connected inverters | |
| Wang et al. | The small-signal stability analysis of the droop-controlled converter in electromagnetic timescale | |
| CN102621382B (en) | Method for detecting frequency, phase and amplitude of electric signal in electric power system | |
| CN107329044B (en) | Power distribution network single-phase earth fault line selection method based on arc transient component | |
| CN106532749B (en) | A kind of micro-capacitance sensor imbalance power and harmonic voltage compensation system and its application | |
| CN106950512B (en) | Energy storage converter grid-connected and grid-disconnected characteristic integrated detection system and method | |
| CN105429484A (en) | PWM rectifier prediction power control method and system based on any period delay | |
| CN103825478A (en) | Control method of modular multilevel converter based on power frequency fixed switching frequency | |
| CN106602895A (en) | Detection method and system of high-voltage DC converter commutation parameters | |
| Wang et al. | Impedance modeling of three-phase grid-connected inverters and analysis of interaction stability in grid-connected system | |
| CN102307004A (en) | L-capacitance-L (LCL)-filtering-based controlled rectifier parameter identification method | |
| Xiong et al. | Amplitude-phase detection for power converters tied to unbalanced grids with large X/R ratios | |
| Karimi-Ghartemani et al. | Extraction of signals for harmonics, reactive current and network-unbalance compensation | |
| Flack et al. | Controller hardware-in-the-loop (C-HIL) testing of decentralized EV-grid integration | |
| Huang et al. | The study of Active Power Filter using a universal harmonic detection method | |
| CN106684926A (en) | Pre-sync control method for DC/AC inverter in black start of hybrid microgrid | |
| CN103592984A (en) | Method for decomposing and reconstructing current instantaneous sequence component of triangular connection current transformer | |
| CN106803683A (en) | A kind of two-way AC/DC convertor model prediction current control method | |
| CN106487039A (en) | A kind of Phase Lock Technique suitable for network deformation | |
| Inci et al. | Multipurpose compensation scheme for voltage sag/swell and selective harmonics elimination in distribution systems | |
| Ding et al. | Modeling and Control of Grid-following Single-Phase Voltage-Sourced Converter | |
| Luo et al. | Balance Control of SOC for MMC-BESS With Power Fluctuation Suppression, PCC Voltage Regulation, and Harmonic Mitigation in Grid-Connected Wind Farm | |
| CN109193749B (en) | Harmonic generation device based on recursive discrete Fourier transform and control method | |
| Dang et al. | An improved voltage sensorless model predictive direct power control for Vienna rectifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150422 |
|
| RJ01 | Rejection of invention patent application after publication |