CN105958478A - Comprehensive voltage sag treatment method for high-quality power park - Google Patents
Comprehensive voltage sag treatment method for high-quality power park Download PDFInfo
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- CN105958478A CN105958478A CN201610343001.5A CN201610343001A CN105958478A CN 105958478 A CN105958478 A CN 105958478A CN 201610343001 A CN201610343001 A CN 201610343001A CN 105958478 A CN105958478 A CN 105958478A
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- voltage
- voltage dip
- dip
- sensitive users
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Classifications
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- 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
-
- 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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
Abstract
The invention discloses a comprehensive voltage sag treatment method for a high-quality power park. The method comprises the following steps that A) a wave recorder records abnormal voltage waveform of an electric energy quality monitoring point in the power park; B) the recorded abnormal voltage waveform of the electric energy quality monitoring point is analyzed to obtain the sag depth of the voltage waveform of voltage sag; C) sensitive users in the high-quality power park are graded according to tolerance to voltage sag; and D) according to an analysis result, one voltage sag treatment measure which can satisfy requirements of the sensitive users and is highest in economical performance is selected from multiple voltage sag treatment measures to implement treatment. The comprehensive voltage sag treatment method can be used to make rapid response and treat voltage sag, guarantee is provided for safe and economic operation for the voltage sag sensitive users, and the method has good application prospects.
Description
Technical field
The present invention relates to a kind of comprehensive processing method of voltage dip in quality power garden,
Belong to power quality analysis technical field.
Background technology
Voltage dip, is also called voltage dip, voltage sag or Voltage Drop, and voltage dip is
Supply voltage root-mean-square valve is promptly restored to again normal condition after declining the most suddenly
Event, general typical time period is the time of 0.5～30 cycle.
Along with electrical equipment develops towards the direction increasingly become more meticulous, digital control equipment exists
Each department of national economy plays increasing effect, such as various automatic production lines, meter
Calculation machine system, programmable logic controller (PLC) etc..These equipment on the one hand can improve production efficiency,
Liberate the productive forces, on the other hand, these equipment to power quality problem especially to voltage dip
Extremely sensitive, the voltage dip continuing several cycles is possible to interrupt so that producing, and causes pole
Big economic loss.At present, voltage dip has become as one of the most serious power quality problem
Receiving increasing attention, voltage sag compensation device huge number, such as, solid-state is cut
Change switch (SSTS), uninterrupted power source (UPS), dynamic voltage compensator (DVR), divide
Cloth power supplys (DG) etc., different compensation devices is all deposited at treatment cost and regulation effect
In certain difference.
Quality power garden, i.e. builds at one relatively unified for the user sensitive to the quality of power supply
In the region concentrated, integrated application various power quality controlling equipment provides service for sensitive users,
Supply of electric power is made to disclosure satisfy that the demand of user.And for the sensitive users in garden, electricity
The pressure power quality problem that fall is the most serious temporarily, therefore, enters voltage dip in garden
Row comprehensive control, reduces user's loss, it appears particularly necessary.
At present, control to compare shortage not yet to the comprehensive control of voltage dip in quality power garden,
How to be proposed for the comprehensive processing method of voltage dip in quality power garden, for voltage dip
The safety and economic operation of sensitive users provides sound assurance, is current urgent problem.
Summary of the invention
The invention aims to overcome in prior art to voltage in quality power garden
The comprehensive control of fall temporarily controls to compare shortage not yet, how to be proposed for quality power garden electricity
The problem of the pressure comprehensive processing method of fall temporarily.The voltage in quality power garden of the present invention
The comprehensive processing method of fall temporarily, by the power consumer unified management sensitive to voltage dip, right
Use different controlling device configurations in different sensitive users and control, for the voltage occurred
Fall, responds rapidly to, administers it, thus be the safety of voltage dip sensitive users temporarily
Economical operation provides safeguard, and has a good application prospect.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of comprehensive processing method of voltage dip in quality power garden, it is characterised in that:
Comprise the following steps,
Step (A), uses electric energy quality monitoring point in oscillograph record quality power garden different
Normal voltage waveform, the abnormal voltage for electric energy quality monitoring point of described electric energy quality monitoring point goes out
Existing non-sinusoidal abnormal conditions；
Step (B), analyzes the voltage waveform that the electric energy quality monitoring point of record is abnormal, obtains
The temporary drawdown degree of the voltage waveform of voltage dip；
Step (C), according to the sensitive users toleration to voltage dip in quality power garden,
Sensitive users is carried out toleration classification；
Step (D), according to step (B) and the analysis result of step (C), from multiple electricity
Choosing, in pressure fall control measures temporarily, the demand that disclosure satisfy that sensitive users, economy is best simultaneously
A kind of voltage dip control measures is administered.
Being previously described for the comprehensive processing method of voltage dip in quality power garden, its feature exists
In: step (A), use electric energy quality monitoring point in oscillograph record quality power garden different
Normal voltage waveform, comprises the following steps,
(A1) PCC point and sensitive load access point installing electric energy in quality power garden
Quality monitoring device, monitors the voltage waveform situation of corresponding point in real time；
(A2), when non-sinusoidal abnormal conditions occurs in voltage waveform, current voltage is recorded
Waveform.
Being previously described for the comprehensive processing method of voltage dip in quality power garden, its feature exists
In: step (B), analyze the voltage waveform that the electric energy quality monitoring point of record is abnormal, including
Following steps,
(B1) voltage waveform of record is analyzed, it is judged that the abnormal conditions occurred are
No for voltage dip, if not voltage dip, then exit the comprehensive control of voltage dip；If
Voltage dip, then perform (B2)；
(B2) voltage waveform for voltage dip is calculated, obtain this voltage dip
The temporary drawdown degree of voltage waveform.
Being previously described for the comprehensive processing method of voltage dip in quality power garden, its feature exists
In: step (C), analyze the sensitive users toleration to voltage dip in quality power garden,
Comprise the following steps,
(C1) each sensitive users tolerance level to voltage dip amplitude in investigation garden；
(C2) according to the sensitive users difference to voltage dip tolerance, by sensitive users
Being divided into A level, AA level, AAA level Three Estate, wherein, A level represents voltage dip
Tolerance the strongest, the most sensitive to voltage dip；AAA level represents to voltage dip
For sensitivity, tolerance is the most weak；AA level is moderate.
Being previously described for the comprehensive processing method of voltage dip in quality power garden, its feature exists
In step (D), drop temporarily control measures to choose from multiple voltage and disclosure satisfy that sensitive users
Demand, a kind of voltage dip control measures that economy is best simultaneously administers, including with
Lower step,
(D1) according to the sensitive users toleration classification results obtained, to quality power garden
Middle sensitive users carries out voltage dip controlling device and carries out configuration installation；
(D2) basis obtains the temporary drawdown degree of voltage dip voltage waveform, controls the quickest
Sense user operates the voltage dip controlling device of correspondence mutually, unifies voltage dip to administer.
Being previously described for the comprehensive processing method of voltage dip in quality power garden, its feature exists
In: if user is only 90% to the tolerance degree of the voltage dip degree of depth, i.e. when voltage dip occurs
Rear voltage drops to less than 90%, all user can cause serious impact, then be classified as
AAA level user；If user is 70% to the tolerance degree of the voltage dip degree of depth, i.e. work as voltage
When drawdown degree is 70%-90% temporarily, user can also normally work, but voltage is less than 70%,
Then cisco unity malfunction, is classified as AA level user；If user is to the voltage dip degree of depth
Tolerance degree is more than 50%, i.e. voltage magnitude just can not normally work, by it less than 50%
Classify as class A user.
The invention has the beneficial effects as follows: the voltage dip in the quality power garden of the present invention
Comprehensive processing method, for the voltage dip occurred, responds rapidly to, administers it, from
And be that the safety and economic operation of voltage dip sensitive users provides safeguard, and have the following advantages,
(1) by the power consumer unified management sensitive to voltage dip, be conducive to temporary to voltage
Fall carries out highly efficient rapid improvement；
(2) voltage dip sensitive users is carried out classification, different sensitive users are used not
Same controlling device configuration and control, more targetedly, administer result and can meet different user
Different demands to the quality of power supply；
(3) consider voltage dip toleration and the voltage dip treatment cost of user, have
It is beneficial to improve the economy that voltage dip is administered.
Accompanying drawing explanation
Fig. 1 is the comprehensive processing method of voltage dip in quality power garden of the present invention
Flow chart.
Fig. 2 is the configuration installation diagram of the voltage dip controlling device of one embodiment of the invention.
Fig. 3 is that the coordination of each voltage dip controlling device of one embodiment of the invention controls
Flow chart.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention will be further described.Following example are only
For technical scheme is clearly described, and can not limit the present invention's with this
Protection domain.
As it is shown in figure 1, be used for the comprehensive processing method of voltage dip in quality power garden, its
It is characterised by: comprise the following steps,
Step (A), uses electric energy quality monitoring point in oscillograph record quality power garden different
Normal voltage waveform, the abnormal voltage for electric energy quality monitoring point of described electric energy quality monitoring point goes out
Existing non-sinusoidal abnormal conditions, comprise the following steps,
(A1) PCC point and sensitive load access point installing electric energy in quality power garden
Quality monitoring device, monitors the voltage waveform situation of corresponding point in real time；
(A2), when non-sinusoidal abnormal conditions occurs in voltage waveform, current electricity is recorded
Corrugating, because for preferable three-phase alternating-current supply, it is relative that its voltage dip should be three
The sinusoidal wave form claimed, and each phase voltage amplitude phase place do not changes, when the electricity detected
When corrugating is unsatisfactory for the requirement of ideal waveform, i.e. it is judged as that voltage waveform occurs abnormal, note
Recording this abnormal voltage waveform, the analysis for step (B) is prepared；
Step (B), analyzes the voltage waveform that the electric energy quality monitoring point of record is abnormal, obtains
The temporary drawdown degree of the voltage waveform of voltage dip, comprises the following steps,
(B1) voltage waveform of record is analyzed, it is judged that the abnormal conditions occurred are
No for voltage dip, if not voltage dip, then exit the comprehensive control of voltage dip, can
It is judged the power quality problem that belongs to, and is correspondingly processed；If voltage is temporary
Fall, then perform (B2), it is judged that process uses RMS to DC method,
(1) arranging RMS to DC time window T is half cycle；
(2) the root-mean-square value U of voltage signal u (t) in half cycle of this waveform is asked forrms,
Wherein, T is the length of time window, is half cycle, t0Calculate for root-mean-square value
Time started, it is judged that whether rms voltage less than the 90% of rated voltage, if meeting,
It is judged to voltage dip, otherwise, slides into next time window, carry out root-mean-square value
Calculate；
(B2) voltage waveform for voltage dip is calculated, obtain this voltage dip
The temporary drawdown degree of voltage waveform, calculates abnormal voltage waveform according to above-mentioned (2) and owns
The rms voltage of time window, selects voltage root-mean-square minimum in all time windows
Value, is the temporary drawdown degree of this voltage dip waveform；
Step (C), according to the sensitive users toleration to voltage dip in quality power garden,
Sensitive users is carried out toleration classification, comprises the following steps,
(C1) each sensitive users tolerance level to voltage dip amplitude in investigation garden；
(C2) according to the sensitive users difference to voltage dip tolerance, wherein, if using
Family is only 90% to the tolerance degree of the voltage dip degree of depth, i.e. voltage drop after there is voltage dip
To less than 90%, all user can be caused serious impact, then be classified as AAA level
User；If user is 70% to the tolerance degree of the voltage dip degree of depth, i.e. when the voltage dip degree of depth
During for 70%-90%, user can also normally work, but voltage is less than 70%, then can not
Normal work, is classified as AA level user；If the tolerance journey that user is to the voltage dip degree of depth
Degree is more than 50%, i.e. voltage magnitude just can not normally work less than 50%, is classified as A
Level user.
Step (D), according to step (B) and the analysis result of step (C), from multiple electricity
Choosing, in pressure fall control measures temporarily, the demand that disclosure satisfy that sensitive users, economy is best simultaneously
A kind of voltage dip control measures is administered, and comprises the following steps,
(D1) according to the sensitive users toleration classification results obtained, to quality power garden
Middle sensitive users carries out voltage dip controlling device and carries out configuration installation, as in figure 2 it is shown, one
The installation diagram of embodiment,
A level sensitive users is represented, it is possible to the ability bearing voltage dip is the strongest, right with L1
SVC is as voltage sag compensation device in its configuration；AA level sensitive users is represented with L2,
To its configuration UPS as voltage sag compensation device；Represent that AAA level sensitivity is used with L3
Family, to its configuration DVR as voltage sag compensation device；
(D2) basis obtains the temporary drawdown degree of voltage dip voltage waveform, controls the quickest
Sense user operates the voltage dip controlling device of correspondence mutually, unifies voltage dip to administer,
Embodiment as shown in Figure 2, the coordination control flow chart of each voltage dip controlling device,
As it is shown on figure 3,
(1) if < 50%, switching solid-state switch, by supply line for voltage dip degree of depth Usag
Switch on standby feeder line, and PPP busbar voltage is further calculated；If voltage
Fall 50% < Usag < 90% temporarily, it is not necessary to switching solid-state switch, directly carries out next step；If temporarily
Whether fall voltage meets Usag > 90%, if meeting, then voltage dip is administered and is terminated, if not
Meet, carry out next step；
(2) calculate the voltage dip degree of depth, if fall voltage Usag > 70% temporarily, only put into
AAA level sensitive users is administered by DVR, UPS with SVC is failure to actuate；If dropping temporarily
Voltage 50% < Usag < 70%, then put into DVR and UPS respectively to AAA level user and
AA level user carries out voltage dip improvement, and SVC is failure to actuate；If Usag < 50%, simultaneously
Enable DVR, UPS, SVC and the sensitive users of three ranks is carried out voltage dip compensation；
(3) detect further, if thus resulting in voltage because off-capacity etc. is former administering result
Can not compensate to the value required for user, enable distributed power source (DG) in garden
Voltage dip carries out certain compensation support.
In sum, the comprehensive control side of voltage dip in quality power garden of the present invention
Method, for the voltage dip occurred, responds rapidly to, administers it, thus be that voltage is temporary
The safety and economic operation of fall sensitive users provides safeguard, and has the following advantages,
(1) by the power consumer unified management sensitive to voltage dip, be conducive to temporary to voltage
Fall carries out highly efficient rapid improvement；
(2) voltage dip sensitive users is carried out classification, different sensitive users are used not
Same controlling device configuration and control, more targetedly, administer result and can meet different user
Different demands to the quality of power supply；
(3) consider voltage dip toleration and the voltage dip treatment cost of user, have
It is beneficial to improve the economy that voltage dip is administered.
The ultimate principle of the present invention, principal character and advantage have more than been shown and described.The industry
Skilled person will appreciate that, the present invention is not restricted to the described embodiments, above-described embodiment and
The principle that the present invention is simply described described in description, without departing from spirit and scope of the invention
On the premise of, the present invention also has various changes and modifications, and these changes and improvements both fall within to be wanted
In seeking the scope of the invention of protection.Claimed scope by appending claims and
Its equivalent defines.
Claims (6)
1. the comprehensive processing method of voltage dip in quality power garden, it is characterised in that: comprise the following steps,
Step (A), uses the voltage waveform that in oscillograph record quality power garden, electric energy quality monitoring point is abnormal, and described electric energy quality monitoring point is that the voltage of electric energy quality monitoring point non-sinusoidal abnormal conditions occurs extremely；
Step (B), analyzes the voltage waveform that the electric energy quality monitoring point of record is abnormal, obtains the temporary drawdown degree of the voltage waveform of voltage dip；
Step (C), according to the sensitive users toleration to voltage dip in quality power garden, carries out toleration classification to sensitive users；
Step (D), according to step (B) and the analysis result of step (C), drops control measures the demand that disclosure satisfy that sensitive users of choosing temporarily from multiple voltage, and the best voltage dip control measures of economy is administered.
The comprehensive processing method of voltage dip in quality power garden the most according to claim 1, it is characterised in that: step (A), use the voltage waveform that in oscillograph record quality power garden, electric energy quality monitoring point is abnormal, comprise the following steps,
(A1) PCC point and sensitive load access point installing power quality monitoring device in quality power garden, monitor the voltage waveform situation of corresponding point in real time；
(A2), when non-sinusoidal abnormal conditions occurs in voltage waveform, current voltage waveform is recorded.
The comprehensive processing method of voltage dip in quality power garden the most according to claim 1, it is characterised in that: step (B), analyze the voltage waveform that the electric energy quality monitoring point of record is abnormal, comprise the following steps,
(B1) voltage waveform of record is analyzed, it is judged that whether the abnormal conditions occurred are voltage dip, if not voltage dip, then exit the comprehensive control of voltage dip；If voltage dip, then perform (B2)；
(B2) voltage waveform for voltage dip is calculated, obtain the temporary drawdown degree of the voltage waveform of this voltage dip.
The comprehensive processing method of voltage dip in quality power garden the most according to claim 1, it is characterised in that: step (C), analyze the sensitive users toleration to voltage dip in quality power garden, comprise the following steps,
(C1) each sensitive users tolerance level to voltage dip amplitude in investigation garden；
(C2) according to the sensitive users difference to voltage dip tolerance, sensitive users being divided into A level, AA level, AAA level Three Estate, wherein, A level represents that the tolerance to voltage dip is the strongest, the most sensitive to voltage dip；AAA level represents most sensitive to voltage dip, and tolerance is the most weak；AA level is moderate.
The comprehensive processing method of voltage dip in quality power garden the most according to claim 1, it is characterized in that: step (D), drop temporarily control measures from multiple voltage and choose the demand that disclosure satisfy that sensitive users, a kind of voltage dip control measures that economy is best simultaneously is administered, comprise the following steps
(D1) according to the sensitive users toleration classification results obtained, sensitive users in quality power garden is carried out voltage dip controlling device and carries out configuration installation；
(D2) basis obtains the temporary drawdown degree of voltage dip voltage waveform, controls corresponding sensitive users and operates the voltage dip controlling device of correspondence mutually, unifies voltage dip to administer.
The comprehensive processing method of voltage dip in quality power garden the most according to claim 4, it is characterized in that: if user is only 90% to the tolerance degree of the voltage dip degree of depth, i.e. after there is voltage dip, voltage drops to less than 90%, all user can be caused serious impact, then be classified as AAA level user；If user is 70% to the tolerance degree of the voltage dip degree of depth, i.e. when the voltage dip degree of depth is 70%-90%, user can also normally work, but voltage is less than 70%, then cisco unity malfunction is classified as AA level user；If user is to the tolerance degree of the voltage dip degree of depth more than 50%, i.e. voltage magnitude just can not normally work less than 50%, is classified as class A user.
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| CN109995050A (en) * | 2019-05-15 | 2019-07-09 | 广东电网有限责任公司 | Meter and the probabilistic compensation equipment optimizing configuration method of voltage dip economic loss |
| CN111404166A (en) * | 2019-10-28 | 2020-07-10 | 众诚开源电气科技(成都)有限公司 | Voltage sag comprehensive control method |
| CN111600311A (en) * | 2020-04-22 | 2020-08-28 | 国网浙江省电力有限公司绍兴供电公司 | Coordination control method for multiple power quality management equipment of power distribution network |
| CN111654034A (en) * | 2020-06-24 | 2020-09-11 | 广东电网有限责任公司电力科学研究院 | Park level voltage sag layered and graded treatment system and method and terminal equipment |
| CN112054516A (en) * | 2020-09-04 | 2020-12-08 | 广东电网有限责任公司广州供电局 | Hierarchical power supply framework, method and equipment for industrial park with distributed power supply |
| CN113497448A (en) * | 2021-07-27 | 2021-10-12 | 国网湖南省电力有限公司 | Sensitive enterprise voltage sag control method and device considering comprehensive benefits |
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| CN113497448A (en) * | 2021-07-27 | 2021-10-12 | 国网湖南省电力有限公司 | Sensitive enterprise voltage sag control method and device considering comprehensive benefits |
| CN113497448B (en) * | 2021-07-27 | 2022-06-10 | 国网湖南省电力有限公司 | Sensitive enterprise voltage sag control method and device considering comprehensive benefits |
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| CN105958478B (en) | 2019-03-19 |
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