CN104821591A - Power factor compensation control method based on static-type dynamic reactive power regulation device - Google Patents
Power factor compensation control method based on static-type dynamic reactive power regulation device Download PDFInfo
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- CN104821591A CN104821591A CN201510245466.2A CN201510245466A CN104821591A CN 104821591 A CN104821591 A CN 104821591A CN 201510245466 A CN201510245466 A CN 201510245466A CN 104821591 A CN104821591 A CN 104821591A
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- 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
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses a power factor compensation control method based on a static-type dynamic reactive power regulation device. In the steps of the method, obtained reactive current instruction values are used as the instruction values of a current inner-loop Q axis of the static-type dynamic reactive power regulation device, and obtained reactive current values are used as the feedback values of the current inner-loop Q axis of the static-type dynamic reactive power regulation device. Beneficial technical effects of the method are that power factors are reduced to control an outer ring, and control parameters set by a whole system are reduced, debugging of engineering technicians is easy, so application of the method is easy, power grid voltage and power grid current are not needed to be detected to calculate power factor values, just voltage of grid-connected points of the static-type dynamic reactive power regulation device and output current of a new energy power generation system need detecting, so that a voltage detection device is reduced, thereby saving system cost, and the control method is simple and little in calculated amount, and is beneficial for engineering practice.
Description
Technical field
The present invention relates to a kind of control method, particularly relate to a kind of power factor compensation control method based on silent oscillation dynamic reactive-load adjusting device.
Background technology
There is a large amount of emotional resistances in the renewable energy system such as wind power generation, photovoltaic generation, therefore need the grid-connected place of these systems install the power electronic equipment that can carry out dynamic reactive power adjustment solve its grid-connected in low power factor problem.What the current power factor compensation control method based on silent oscillation dynamic reactive-load adjusting device generally adopted is power factor control method, that is: on the basis of original current inner loop uneoupled control, power factor command value is followed the tracks of constantly by power factor control realization bucking-out system power factor, but, in engineering practice, increase pi regulator and can increase the variety of problems such as system debug difficulty and algorithm complexity, Project Realization difficulty is larger.
Summary of the invention
The object of the present invention is to provide a kind of power factor compensation control method based on silent oscillation dynamic reactive-load adjusting device, existing control method is improved, simplify control method, reduce controling parameters, with solve the renewable energy system such as wind power generation, photovoltaic generation grid-connected in low power factor problem.
The present invention adopts following technical scheme to realize:
Based on the power factor compensation control method of silent oscillation dynamic reactive-load adjusting device, the method comprises following steps:
(1) obtain silent oscillation dynamic reactive-load adjusting device and the line voltage of site by voltage sensor, be designated as: u
su, u
sv, u
sw, and utilize digital phase-locked loop to calculate line voltage electrical degree ω t and grid voltage amplitude V
sd; Obtain silent oscillation dynamic reactive-load adjusting device output current by current sensor, be designated as: i
u, i
v, i
w, and electricity generation system output current, be designated as: i
su, i
sv, i
sw;
(2) according to described line voltage electrical degree, 3s/2r coordinate transformation method is utilized, by electricity generation system output current i
su, i
sv, i
swbe transformed to active current and reactive current component, be designated as i respectively
sdand i
sq; According to grid voltage amplitude V
sdwith active current i
sdand reactive current component i
sq, utilize formula p=V
sd.i
sdand q=V
sd.i
sq, obtain active power p and the reactive power q of electricity generation system output respectively;
(3) according to power factor of electric network command value λ
*, utilize formula
obtain output reactive power value needed for silent oscillation dynamic reactive-load adjusting device, pass through formula
obtain the required command value exporting reactive current of silent oscillation dynamic reactive-load adjusting device;
(4) according to line voltage electrical degree, 3s/2r coordinate transformation method is utilized, by silent oscillation dynamic reactive-load adjusting device output current i
u, i
v, i
wbe transformed to active current and reactive current component, be designated as i respectively
dand i
q; Using the command value of referenced reactive current value as silent oscillation dynamic reactive-load adjusting device current inner loop Q axle, using the value of feedback of reactive current value as silent oscillation dynamic reactive-load adjusting device current inner loop Q axle.
The Advantageous Effects that the present invention possesses is: decrease power factor controlling outer shroud, and the controling parameters that whole system is arranged reduces, and is easy to engineers and technicians' debugging, is therefore conducive to the application of the inventive method; Do not need detection of grid voltage and power network current to carry out rated output factor value, only need to detect the grid-connected point voltage of silent oscillation dynamic reactive-load adjusting device and grid-connected power generation system output current, thus can reduce by a voltage check device, save system cost; Control method is simple, amount of calculation is few, is conducive to engineering practice.
Accompanying drawing explanation
Fig. 1 is the detail flowchart that the inventive method solves silent oscillation dynamic reactive-load adjusting device referenced reactive current value.
Fig. 2 is the master control block diagram of the high-power chain static type dynamic reactive-load adjusting device using the inventive method.
Fig. 3 is an application system configuration sketch of the present invention.
Fig. 4 is when emulating system shown in Figure 3, simulation waveform figure when to utilize the inventive method to control power factor of electric network be 0.9:
Fig. 4 (a) is electrical network output power factor;
Fig. 4 (b) is the grid-connected point voltage of U phase and U phase power network current;
Fig. 4 (c) is that the grid-connected point voltage of U phase and silent oscillation reactive-load adjusting device export U phase current;
Fig. 5 is when emulating system shown in Figure 3, simulation waveform figure when to utilize the inventive method to control power factor of electric network be 1:
Fig. 5 (a) is electrical network output power factor;
Fig. 5 (b) is the grid-connected point voltage of U phase and U phase power network current;
Fig. 5 (c) is that the grid-connected point voltage of U phase and silent oscillation reactive-load adjusting device export U phase current
Embodiment
By below to the description of embodiment; to more contribute to public understanding the present invention; but the restriction that the specific embodiment given by applicant can't be considered as technical solution of the present invention, any definition to parts or technical characteristic change and/or to overall structure do form and immaterial conversion all should be considered as the protection range that technical scheme of the present invention limits.
Specific embodiment: based on the power factor compensation control method of silent oscillation dynamic reactive-load adjusting device, the method comprises following steps:
(1) obtain silent oscillation dynamic reactive-load adjusting device and the line voltage of site by voltage sensor, be designated as: u
su, u
sv, u
sw, and utilize digital phase-locked loop to calculate line voltage electrical degree ω t and grid voltage amplitude V
sd; Obtain silent oscillation dynamic reactive-load adjusting device output current by current sensor, be designated as: i
u, i
v, i
w, and electricity generation system output current, be designated as: i
su, i
sv, i
sw;
(2) according to described line voltage electrical degree, 3s/2r coordinate transformation method is utilized, by electricity generation system output current i
su, i
sv, i
swbe transformed to active current and reactive current component, be designated as i respectively
sdand i
sq; According to grid voltage amplitude V
sdwith active current i
sdand reactive current component i
sq, utilize formula p=V
sd.i
sdand q=V
sd.i
sq, obtain active power p and the reactive power q of electricity generation system output respectively;
(3) according to power factor of electric network command value λ
*, utilize formula
obtain output reactive power value needed for silent oscillation dynamic reactive-load adjusting device, pass through formula
obtain the required command value exporting reactive current of silent oscillation dynamic reactive-load adjusting device;
(4) according to line voltage electrical degree, 3s/2r coordinate transformation method is utilized, by silent oscillation dynamic reactive-load adjusting device output current i
u, i
v, i
wbe transformed to active current and reactive current component, be designated as i respectively
dand i
q; Using the command value of referenced reactive current value as silent oscillation dynamic reactive-load adjusting device current inner loop Q axle, using the value of feedback of reactive current value as silent oscillation dynamic reactive-load adjusting device current inner loop Q axle.
With instantiation, the power factor compensation control method based on silent oscillation dynamic reactive-load adjusting device in the present invention is described below.In order to test conveniently, for the system configuration shown in Fig. 3, the parameters of system is as shown in the table:
| Mains frequency f/Hz | 50 |
| Grid line voltage effective value V s/V | 380 |
| Silent oscillation dynamic reactive-load adjusting device rated capacity Q/kVar | 100 |
| Electricity generation system active power of output P/kW | 37.5 |
| Electricity generation system output reactive power Q/kVar | 50 |
Under MATLAB simulated environment, on the basis that power decoupled controls, design power Power Factor Controller.The simulation result obtained is as shown in Figure 4 and Figure 5:
Fig. 4 shows, before silent oscillation dynamic reactive-load adjusting device off-duty, power factor of electric network value is 0.6; When 0.1s, setting power factor of electric network value is 0.9, now silent oscillation dynamic reactive-load adjusting device puts into operation, device output current wave is as shown in Fig. 4 (c), silent oscillation dynamic reactive-load adjusting device provides the lagging reactive power needed for grid-connected power generation system, and now PCC point voltage and power network current waveform are as shown in Fig. 4 (b); Power factor of electric network value is 0.9, and power factor simulation waveform is as shown in Fig. 4 (a).
Fig. 5 shows, before silent oscillation dynamic reactive-load adjusting device off-duty, power factor of electric network value is 0.6; When 0.1s, setting power factor of electric network value is 1, now silent oscillation dynamic reactive-load adjusting device puts into operation, device output current wave is as shown in Fig. 5 (c), silent oscillation dynamic reactive-load adjusting device provides the lagging reactive power needed for grid-connected power generation system completely, now PCC point voltage differs 0 degree with power network current waveform, as shown in Fig. 5 (b); Power factor of electric network value is 1, and power factor simulation waveform is as shown in Fig. 5 (a).
Certainly; the present invention can also have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (1)
1., based on the power factor compensation control method of silent oscillation dynamic reactive-load adjusting device, it is characterized in that the method comprises following steps:
(1) obtain silent oscillation dynamic reactive-load adjusting device and the line voltage of site by voltage sensor, be designated as: u
su, u
sv, u
sw, and utilize digital phase-locked loop to calculate line voltage electrical degree ω t and grid voltage amplitude V
sd; Obtain silent oscillation dynamic reactive-load adjusting device output current by current sensor, be designated as: i
u, i
v, i
w, and electricity generation system output current, be designated as: i
su, i
sv, i
sw;
(2) according to described line voltage electrical degree, 3s/2r coordinate transformation method is utilized, by electricity generation system output current i
su, i
sv, i
swbe transformed to active current and reactive current component, be designated as i respectively
sdand i
sq; According to grid voltage amplitude V
sdwith active current i
sdand reactive current component i
sq, utilize formula p=V
sd.i
sdand q=V
sd.i
sq, obtain active power p and the reactive power q of electricity generation system output respectively;
(3) according to power factor of electric network command value λ
*, utilize formula
obtain output reactive power value needed for silent oscillation dynamic reactive-load adjusting device, pass through formula
obtain the required command value exporting reactive current of silent oscillation dynamic reactive-load adjusting device;
(4) according to line voltage electrical degree, 3s/2r coordinate transformation method is utilized, by silent oscillation dynamic reactive-load adjusting device output current i
u, i
v, i
wbe transformed to active current and reactive current component, be designated as i respectively
dand i
q; Using the command value of referenced reactive current value as silent oscillation dynamic reactive-load adjusting device current inner loop Q axle, using the value of feedback of reactive current value as silent oscillation dynamic reactive-load adjusting device current inner loop Q axle.
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| CN201510245466.2A CN104821591A (en) | 2015-05-14 | 2015-05-14 | Power factor compensation control method based on static-type dynamic reactive power regulation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597092A (en) * | 2016-10-13 | 2017-04-26 | 江苏海事职业技术学院 | High-precision anti-interference fixed-point computer three-phase voltage frequency measurement phase-locking algorithm |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166226A (en) * | 2013-03-29 | 2013-06-19 | 华北电力大学（保定） | Network voltage reactive-power compound coordination control system and method for new energy power generation |
| CN103337863A (en) * | 2013-07-04 | 2013-10-02 | 东方日立(成都)电控设备有限公司 | Power factor compensation control method based on static dynamic reactive adjusting device |
| JP2014073008A (en) * | 2012-09-28 | 2014-04-21 | Energy Support Corp | Reactive power compensator |
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- 2015-05-14 CN CN201510245466.2A patent/CN104821591A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014073008A (en) * | 2012-09-28 | 2014-04-21 | Energy Support Corp | Reactive power compensator |
| CN103166226A (en) * | 2013-03-29 | 2013-06-19 | 华北电力大学（保定） | Network voltage reactive-power compound coordination control system and method for new energy power generation |
| CN103337863A (en) * | 2013-07-04 | 2013-10-02 | 东方日立(成都)电控设备有限公司 | Power factor compensation control method based on static dynamic reactive adjusting device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597092A (en) * | 2016-10-13 | 2017-04-26 | 江苏海事职业技术学院 | High-precision anti-interference fixed-point computer three-phase voltage frequency measurement phase-locking algorithm |
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