CN105958478B - A kind of comprehensive processing method for voltage dip in quality power garden - Google Patents
A kind of comprehensive processing method for voltage dip in quality power garden Download PDFInfo
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- CN105958478B CN105958478B CN201610343001.5A CN201610343001A CN105958478B CN 105958478 B CN105958478 B CN 105958478B CN 201610343001 A CN201610343001 A CN 201610343001A CN 105958478 B CN105958478 B CN 105958478B
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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
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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
- 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]
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Abstract
The invention discloses a kind of comprehensive processing methods for voltage dip in quality power garden, include the following steps, A) use the voltage waveform of electric energy quality monitoring point exception in oscillograph record quality power garden；B) the voltage waveform of the electric energy quality monitoring point exception of analysis record, obtains the temporary drawdown degree of the voltage waveform of voltage dip；C) according to sensitive users in quality power garden to the tolerance of voltage dip, tolerance classification is carried out to sensitive users；D) based on the analysis results, temporarily dropped from multiple voltage and choose the demand of sensitive users of can satisfy in control measures, while a kind of best voltage dip control measures of economy are administered.Comprehensive processing method for voltage dip in quality power garden of the invention is responded rapidly to for the voltage dip of generation, is administered to it, so that the safe and economic operation for voltage dip sensitive users provides safeguard, is had a good application prospect.
Description
Technical field
The present invention relates to a kind of comprehensive processing methods for voltage dip in quality power garden, belong to power quality point
Analyse technical field.
Background technique
Voltage dip, also known as voltage dip, voltage sag or Voltage Drop, voltage dip are supply voltage root-mean-square valves
It is promptly restored to the event of normal condition after decline again suddenly in a short time, general typical time period is 0.5~30 cycle
Time.
As electrical equipment develops towards the direction increasingly refined, digital control equipment is in each department of national economy
It is middle to play increasing effect, such as various automatic production lines, computer system, programmable logic controller (PLC).These
On the one hand equipment can be improved production efficiency, liberate the productive forces, on the other hand, these equipment are especially right to power quality problem
Voltage dip is extremely sensitive, and the voltage dip for continuing several cycles is possible to so that production disruption, causes greatly economic damage
It loses.Currently, voltage dip, which has become one of power quality problem of most serious, receives more and more attention, voltage dip
Compensation device huge number, for example, solid converting switch (SSTS), uninterruptible power supply (UPS), dynamic voltage compensator (DVR),
Distributed generation resource (DG) etc., different compensation devices has a certain difference in treatment cost and regulation effect.
Quality power garden is built the user unification sensitive to power quality in the region of a Relatively centralized,
The various power quality controlling equipment of integrated application provide service for sensitive users, and power supply is made to can satisfy the demand of user.
And for the sensitive users in garden, voltage dip is undoubtedly power quality problem the most serious, therefore, in garden
Voltage dip carries out comprehensive treatment, reduces user's loss, it appears particularly necessary.
Currently, even comparing shortage to the comprehensive treatment control of voltage dip in quality power garden, how to propose to be directed to
The comprehensive processing method of voltage dip in quality power garden provides effectively for the safe and economic operation of voltage dip sensitive users
Guarantee, be current urgent problem.
Summary of the invention
The purpose of the invention is to overcome the comprehensive treatment control to voltage dip in quality power garden in the prior art
System even compares shortage, how to propose aiming at the problem that comprehensive processing method of quality power garden voltage dip.Of the invention
For the comprehensive processing method of voltage dip in quality power garden, the sensitive power consumer of voltage dip will be managed collectively,
For different sensitive users using different controlling device configurations and control, for the voltage dip of generation, respond rapidly to, to it
It is administered, so that the safe and economic operation for voltage dip sensitive users provides safeguard, is had a good application prospect.
In order to achieve the above object, the technical scheme adopted by the invention is that:
A kind of comprehensive processing method for voltage dip in quality power garden, it is characterised in that: include the following steps,
Step (A), it is described using the voltage waveform of electric energy quality monitoring point exception in oscillograph record quality power garden
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 of the electric energy quality monitoring point exception of record, obtains the voltage waveform of voltage dip
Temporary drawdown degree；
Step (C) carries out sensitive users resistance to according to sensitive users in quality power garden to the tolerance of voltage dip
It is classified by property；
Step (D) chooses energy as a result, temporarily dropping from multiple voltage according to the analysis of step (B) and step (C) in control measures
Enough meets the needs of sensitive users, while a kind of best voltage dip control measures of economy are administered.
It is previously described for the comprehensive processing method of voltage dip in quality power garden, it is characterised in that: step (A) makes
With the voltage waveform of electric energy quality monitoring point exception in oscillograph record quality power garden, include the following steps,
(A1) PCC point and sensitive load access point install power quality monitoring device in quality power garden, in real time
Monitor the voltage waveform situation of corresponding points；
(A2), when non-sinusoidal abnormal conditions occurs in voltage waveform, current voltage waveform is recorded.
It is previously described for the comprehensive processing method of voltage dip in quality power garden, it is characterised in that: step (B), point
The voltage waveform of the electric energy quality monitoring point exception of new record, includes the following steps,
(B1) voltage waveform of record is analyzed, judges whether occurred abnormal conditions are voltage dip, if not
It is voltage dip, then exits the comprehensive treatment of voltage dip；If voltage dip, then (B2) is executed；
(B2) it calculates for the voltage waveform of voltage dip, obtains the temporary drawdown of the voltage waveform of the voltage dip
Degree.
It is previously described for the comprehensive processing method of voltage dip in quality power garden, it is characterised in that: step (C), point
Sensitive users in quality power garden are analysed to include the following steps the tolerance of voltage dip,
(C1) tolerance level of each sensitive users to voltage dip amplitude in investigation garden；
(C2) according to sensitive users to the difference of voltage dip tolerance, sensitive users are divided into A grades, AA grades, AAA grades
Three grades, wherein A grades of expressions are most strong to the tolerance of voltage dip, least sensitive to voltage dip；AAA grades of expressions pair
Voltage dip is most sensitive, and tolerance is most weak；AA grades moderate.
It is previously described for the comprehensive processing method of voltage dip in quality power garden, it is characterised in that: step (D), from
The demand chosen in control measures and can satisfy sensitive users, while a kind of voltage dip that economy is best temporarily drop in multiple voltage
Control measures are administered, and are included the following steps,
(D1) according to obtained sensitive users tolerance classification results, voltage is carried out to sensitive users in quality power garden
Temporarily drop controlling device carries out configuration installation；
(D2) according to obtaining the temporary drawdown degree of voltage dip voltage waveform, control corresponding sensitive users mutually operate it is corresponding
Voltage dip controlling device carries out unified improvement to voltage dip.
It is previously described for the comprehensive processing method of voltage dip in quality power garden, it is characterised in that: if user is to electricity
The tolerance degree for pressing temporary drawdown degree is only 90%, i.e., voltage drops to 90% hereinafter, can make to user after voltage dip occurs
At influence seriously, then AAA grades of users are classified as；If user is 70% to the tolerance degree of voltage dip depth, i.e.,
When voltage dip depth is 70%-90%, user can also be worked normally, but voltage is lower than 70%, then cannot normal work
Make, is classified as AA grades of users；If user is more than 50% to the tolerance degree of voltage dip depth, i.e. voltage magnitude is lower than
50% can not just work normally, and be classified as class A user.
The beneficial effects of the present invention are: the comprehensive processing method for voltage dip in quality power garden of the invention,
It for the voltage dip of generation, responds rapidly to, it is administered, to be the safe and economic operation of voltage dip sensitive users
It provides safeguard, and has the following advantages that,
(1) the sensitive power consumer of voltage dip will be managed collectively, is conducive to carry out voltage dip highly efficient fast
The improvement of speed；
(2) voltage dip sensitive users are classified, different sensitive users is configured using different controlling devices
And control more targetedly administers result and is able to satisfy different user to the different demands of power quality；
(3) the voltage dip tolerance and voltage dip treatment cost for comprehensively considering user are conducive to improve voltage dip
The economy of improvement.
Detailed description of the invention
Fig. 1 is the flow chart for the comprehensive processing method of voltage dip in quality power garden of the invention.
Fig. 2 is the configuration installation diagram of the voltage dip controlling device of one embodiment of the invention.
Fig. 3 is the coordinated control flow chart of each voltage dip controlling device of one embodiment of the invention.
Specific embodiment
Below in conjunction with Figure of description, the present invention will be further described.Following embodiment is only used for clearly
Illustrate technical solution of the present invention, and not intended to limit the protection scope of the present invention.
As shown in Figure 1, the comprehensive processing method for voltage dip in quality power garden, it is characterised in that: including with
Lower step,
Step (A), it is described using the voltage waveform of electric energy quality monitoring point exception in oscillograph record quality power garden
Electric energy quality monitoring point is that the voltage of electric energy quality monitoring point non-sinusoidal abnormal conditions occurs extremely, is included the following steps,
(A1) PCC point and sensitive load access point install power quality monitoring device in quality power garden, in real time
Monitor the voltage waveform situation of corresponding points；
(A2), when non-sinusoidal abnormal conditions occurs in voltage waveform, current voltage waveform is recorded, because for ideal
For three-phase alternating-current supply, voltage dip should be the sinusoidal waveform of three-phase symmetrical, and each phase voltage amplitude phase does not occur
Variation it is abnormal to be judged as that voltage waveform occurs, record should when the voltage waveform detected is unsatisfactory for the requirement of ideal waveform
Abnormal voltage waveform is prepared for the analysis of step (B)；
Step (B) analyzes the voltage waveform of the electric energy quality monitoring point exception of record, obtains the voltage waveform of voltage dip
Temporary drawdown degree, include the following steps,
(B1) voltage waveform of record is analyzed, judges whether occurred abnormal conditions are voltage dip, if not
It is voltage dip, then exits the comprehensive treatment of voltage dip, the power quality problem for determining to belong to can be carried out to it, and makees corresponding
Processing；If voltage dip, then executing (B2), deterministic process uses RMS to DC method,
(1) setting virtual value detection time window T is half of cycle；
(2) the root-mean-square value U of the voltage signal u (t) in half of cycle of the waveform is soughtrms,
Wherein, T is the length of time window, is half of cycle, t0At the beginning of calculating for root-mean-square value, voltage is judged
Whether root-mean-square value is lower than the 90% of voltage rating, if satisfied, being determined as voltage dip, otherwise, slides into next time window
Mouthful, carry out the calculating of root-mean-square value；
(B2) it calculates for the voltage waveform of voltage dip, obtains the temporary drawdown of the voltage waveform of the voltage dip
Degree calculates the rms voltage of abnormal all time windows of voltage waveform according to above-mentioned (2), selects all time windows
In the smallest rms voltage, the as temporary drawdown degree of the voltage dip waveform；
Step (C) carries out sensitive users resistance to according to sensitive users in quality power garden to the tolerance of voltage dip
It is classified, is included the following steps by property,
(C1) tolerance level of each sensitive users to voltage dip amplitude in investigation garden；
(C2) according to sensitive users to the difference of voltage dip tolerance, wherein if user is to voltage dip depth
Tolerance degree is only 90%, i.e., voltage drops to 90% hereinafter, can cause shadow seriously to user after voltage dip occurs
It rings, is then classified as AAA grades of users；If user is 70% to the tolerance degree of voltage dip depth, i.e., when voltage dip depth
When degree is 70%-90%, user can also be worked normally, but voltage is lower than 70%, then cisco unity malfunction, is classified as
AA grades of users；If user is more than 50% to the tolerance degree of voltage dip depth, i.e., voltage magnitude just can not be just lower than 50%
Often work, is classified as class A user.
Step (D) chooses energy as a result, temporarily dropping from multiple voltage according to the analysis of step (B) and step (C) in control measures
Enough meets the needs of sensitive users, while a kind of best voltage dip control measures of economy are administered, including following step
Suddenly,
(D1) according to obtained sensitive users tolerance classification results, voltage is carried out to sensitive users in quality power garden
Temporarily drop controlling device carries out configuration installation, as shown in Fig. 2, the installation diagram of an embodiment,
A grades of sensitive users are indicated with L1, and the ability for being able to bear voltage dip is most strong, and it is temporary as voltage that SVC is configured to it
Compensation device drops；AA grades of sensitive users are indicated with L2, and UPS is configured to it as voltage sag compensation device；AAA grades are indicated with L3
Sensitive users configure DVR to it as voltage sag compensation device；
(D2) according to obtaining the temporary drawdown degree of voltage dip voltage waveform, control corresponding sensitive users mutually operate it is corresponding
Voltage dip controlling device carries out unified improvement, embodiment as shown in Figure 2 to voltage dip, and each voltage dip administers dress
The coordinated control flow chart set, as shown in figure 3,
(1) if voltage dip depth Usag < 50%, switch solid-state switch, power supply line is switched on spare feeder line, and
PPP busbar voltage is further calculated；If voltage dip 50% < Usag < 90%, without switching solid-state switch, directly
It carries out in next step；If temporarily whether drop voltage meets Usag > 90%, if satisfied, voltage dip improvement terminates, if not satisfied, into
Row is in next step；
(2) calculate voltage dip depth, if temporarily drop voltage Usag > 70%, only put into DVR to AAA grades of sensitive users into
Row is administered, and UPS is failure to actuate with SVC；If temporarily drop voltage 50% < Usag < 70%, puts into DVR and UPS respectively to AAA grades of users
Voltage dip improvement is carried out with AA grades of users, SVC is failure to actuate；If Usag < 50%, while DVR, UPS, SVC are enabled to three grades
Other sensitive users carry out voltage dip compensation；
(3) improvement result is further detected, if causing voltage that cannot compensate to user institute because of reasons such as off-capacities
The value needed enables distributed generation resource (DG) and carries out certain compensation support to the voltage dip in garden.
In conclusion the comprehensive processing method for voltage dip in quality power garden of the invention, for generation
Voltage dip responds rapidly to, and administers to it, so that the safe and economic operation for voltage dip sensitive users provides safeguard,
And have the following advantages that,
(1) the sensitive power consumer of voltage dip will be managed collectively, is conducive to carry out voltage dip highly efficient fast
The improvement of speed；
(2) voltage dip sensitive users are classified, different sensitive users is configured using different controlling devices
And control more targetedly administers result and is able to satisfy different user to the different demands of power quality；
(3) the voltage dip tolerance and voltage dip treatment cost for comprehensively considering user are conducive to improve voltage dip
The economy of improvement.
Basic principles and main features and advantage of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (3)
1. a kind of comprehensive processing method for voltage dip in quality power garden, it is characterised in that: include the following steps,
Step (A) uses the voltage waveform of electric energy quality monitoring point exception in oscillograph record quality power garden, the 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 of the electric energy quality monitoring point exception of record, obtains the temporary of the voltage waveform of voltage dip
Drawdown degree；
Step (C) carries out tolerance to sensitive users according to sensitive users in quality power garden to the tolerance of voltage dip
Classification；Specifically:
(C1) tolerance level of each sensitive users to voltage dip amplitude in investigation garden；
(C2) according to sensitive users to the difference of voltage dip tolerance, sensitive users are divided into A grades, AA grades, AAA grade three
Grade, wherein A grades of expressions are most strong to the tolerance of voltage dip, least sensitive to voltage dip；AAA grades indicate to voltage
Temporarily drop most sensitive, tolerance is most weak；AA grades moderate；
If user is only 90% to the tolerance degree of voltage dip depth, i.e., after voltage dip occurs voltage drop to 90% with
Under, user can be impacted, then be classified as AAA grades of users；If user is to the tolerance degree of voltage dip depth
70%, i.e., when voltage dip depth is 70%-90%, user can also be worked normally, but voltage is lower than 70%, then cannot
It works normally, is classified as AA grades of users；If user is more than 50%, i.e. voltage magnitude to the tolerance degree of voltage dip depth
It can not just be worked normally lower than 50%, be classified as class A user；
Step (D) can expire according to the analysis of step (B) and step (C) as a result, temporarily dropping from multiple voltage and choosing in control measures
The demand of sufficient sensitive users, while a kind of best voltage dip control measures of economy are administered, specifically:
(D1) according to obtained sensitive users tolerance classification results, the voltage dip of sensitive users in quality power garden is controlled
Reason device carries out configuration installation；
(D2) according to the temporary drawdown degree of voltage dip voltage waveform is obtained, it is temporary to control the corresponding voltage of corresponding sensitive users operation
Controlling device is dropped, unified improvement is carried out to voltage dip.
2. the comprehensive processing method according to claim 1 for voltage dip in quality power garden, it is characterised in that:
Step (A) uses the voltage waveform of electric energy quality monitoring point exception in oscillograph record quality power garden, including following step
Suddenly,
(A1) PCC point and sensitive load access point install power quality monitoring device, real-time monitoring in quality power garden
The voltage waveform situation of corresponding points；
(A2) when non-sinusoidal abnormal conditions occurs in voltage waveform, current voltage waveform is recorded.
3. the comprehensive processing method according to claim 1 for voltage dip in quality power garden, it is characterised in that:
Step (B) is analyzed the voltage waveform of the electric energy quality monitoring point exception of record, is included the following steps,
(B1) voltage waveform of record is analyzed, judges whether occurred abnormal conditions are voltage dip, if not electric
Pressure temporarily drops, then exits the comprehensive treatment of voltage dip；If voltage dip, then (B2) is executed；
(B2) it calculates for the voltage waveform of voltage dip, obtains the temporary drawdown degree of the voltage waveform of the voltage dip.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109995050B (en) * | 2019-05-15 | 2020-06-26 | 广东电网有限责任公司 | Compensation equipment optimization configuration method considering uncertainty of voltage sag economic loss |
| CN110797876A (en) * | 2019-10-28 | 2020-02-14 | 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 |
| CN111654034B (en) * | 2020-06-24 | 2021-08-24 | 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 |
| CN112054516B (en) * | 2020-09-04 | 2022-06-21 | 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 |
| 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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