CN107730145A - A kind of voltage dip Economic loss evaluation method - Google Patents
A kind of voltage dip Economic loss evaluation method Download PDFInfo
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Abstract
The invention discloses a kind of voltage dip Economic loss evaluation method, methods described includes：Electrical characteristic, physical attribute based on sensitive equipment, loss acquisition voltage dip loss event category result is perceived, VTC curves and PIT curves based on sensitive equipment obtain losing quantization principles；Based on voltage dip loss event category result and loss quantization principles, the probabilistic model that inhomogeneity loses event is established respectively；On the basis of the inhomogeneity loss probability of happening is drawn based on probabilistic model, industrial process voltage dip economic loss is calculated；Industrial process voltage dip Economic loss evaluation universal model is established, carries out voltage dip investment for user and administer to provide decision-making foundation.
Description
Technical field
The present invention relates to electric power quality economic evaluation field, in particular it relates to it is a kind of based on electrical characteristic,
Physical attribute, the voltage dip Economic loss evaluation method for perceiving loss.
Background technology
Voltage dip is to huge caused by the industry users such as semiconductor, electronics, pharmacy, weaving, petrochemical industry caused by thunderbolt etc.
It is big to influence and lose, paid much attention to by industrial quarters, academia and government.High and new tech park user is temporary by voltage every year
Drop about 10~30 times, cause loss about 2 to 10 or more than 20 times.Therefore, grid company and with taking active measures per family, but
It is that voltage dip loss has uncertain and difficult foresight, and grid side or user side measure all refer to investment, thrown sometimes
Money is even more than the investment of other capital equipments.Therefore further investigation voltage dip economic loss and consumer's risk appraisal procedure, tool
There are most important theories value and realistic meaning.
Research to voltage dip loss appraisal method is still in the experience accumulation stage at present, mainly divide direct method and indirectly
Method.Direct method includes investigation statisticses method and analytic method；Indirect method includes willingness-to-pay method (WTP, willingness to pay)
With receive wish method (WTA, willingness to accept) etc..Wherein, investigation statisticses method counts to actual loss,
Therefore, China has also formulated relevant criterion《GB/Z 32880.1-2016 quality of power supply economic evaluation part 1s：Power consumer
Economic evaluation method》, reliable results, but time and effort consuming, generalization be not strong；Analytic method includes probabilistic method, fuzz method etc., pushes away
Wide property is stronger, and its core is evaluation process voltage sag immunity, but the equal slave unit electrical characteristic of such method is set out, to voltage
Tolerance carries out uncertainties model, does not consider that physical attribute and user perceive, practicality is not good enough.Using WTP and WTA as representative
Indirect method consider user perception, but to electrically and physically attribute consider deficiency, subjectivity and sample dependence are stronger, easy mistake
Estimation is owed in estimation.
CIGRE/CIRED JWG C4.110 propose procedure parameter immunization time (parameter immunity time,
PIT) concept, it is believed that process or equipment PIT times are consistent with the voltage dip duration, and PIT metrics process voltages can be used temporary
Immunity drops.This method proposes that the physical attribute of voltage dip loss event is portrayed with procedure parameter immunization time, in logic
There is certain reasonability, new approaches are provided for voltage dip loss appraisal, but electrical characteristic is different from physical attribute, between the two
Not fairly linear relation, and also need further to consider that user perceives loss and its quantization method.
In summary, present inventor has found above-mentioned technology extremely during the present application technical scheme is realized
Following technical problem less be present：
In the prior art, the equipment that existing voltage dip loss appraisal method is present 1) in addition to normal and failure is electric
State is difficult to determine；2) what in practice, user can directly perceive is (such as temperature, rotating speed, the wind speed of physical parameter in production process
Deng) change, rather than in production process equipment electric state；3) ignore temporarily drop and do not result in the skills such as the loss of industrial process interruption
Art problem.
The content of the invention
The invention provides a kind of voltage dip Economic loss evaluation method, solves existing voltage dip loss appraisal
The existing modeling of method only considers equipment electric state, does not consider process physical parameter, ignores the perceived process of user not
The technical problems such as preemption penalty, realize the technique effect for improving temporarily drop loss appraisal accuracy.
For achieving the above object, this application provides a kind of voltage dip Economic loss evaluation method, methods described
Including：
Step 1：Electrical characteristic, physical attribute based on sensitive equipment, perceive loss acquisition voltage dip loss event point
Class result, VTC curves and PIT curves based on sensitive equipment obtain losing quantization principles；
Step 3：Based on voltage dip loss event category result and loss quantization principles, inhomogeneity loss thing is established respectively
The probabilistic model of part；
Step 3：On the basis of the inhomogeneity loss probability of happening is drawn based on probabilistic model, it is temporary to calculate industrial process voltage
Economic loss drops.
In fact, the loss of user's voltage dip is simultaneously with temporarily dropping the order of severity, equipment electrical characteristic, physical attribute and user
Perception etc. is relevant, in the case where the temporary precipitation of given voltage is flat, assesses the voltage dip loss that user is subjected to, need to consider sensitive equipment simultaneously
Electrical characteristic, physical attribute and user perceive.
The present invention respectively from electrical characteristic, physical attribute and user perceive loss angularly loss event is analyzed and
Evaluation；The general depicting method of voltage dip response events electrical characteristic and physical attribute mapping relations is studied, by user's voltage
Temporarily drop loss event is divided into process interrupt and user perceives two subevents of loss, is based respectively on investigation statisticses and user perceives and commented
Estimate preemption penalty and perceive and lose, propose a kind of industrial process voltage dip Economic loss evaluation universal model.
Further, the step 1, is specifically included：
1a, acquisition voltage dip loss event category result is lost based on electrical characteristic-physical attribute-perception；
1b, loss quantization principles are obtained based on VTC and PIT.
Further, in step 1a, from industrial process by sensitive equipment electrical characteristic, physical parameter after voltage dip
Change, user perceive three angles of loss and set out, it is contemplated that voltage dip also has equipment in addition to causing process interrupt and losing
Non- failure, but during physical parameter deviate to a certain extent after, user will also perceive the phenomenon of loss.Voltage dip is damaged
Accident part is divided into process interrupt loss event and user perceives loss event, and the assessment for temporarily drop loss lays the foundation.
Further, in step 1b, it is contemplated that temporarily the VTC curves of drop sensitive equipment and PIT curves react electric respectively
Characteristic and physical attribute, the general depicting method based on carried VTC curves and PIT curve mapping relations, specify voltage dip damage
Lose quantization principles.
The depicting method of VTC curves and PIT curve mapping relations based on sensitive equipment includes：
For voltage dip at VTC safety zones, physical parameter maintains normal value PPN, there is no the event of losing；
For voltage dip at VTC uncertain regions, different temporary declines correspond to different PIT curves, are subjected to identical
The PIT times corresponding to physical parameter level are different, and the different corresponding different users of physical parameter departure degree perceive loss event；
For voltage dip at VTC fault zones, physical parameter crosses limit value PPlimit, generating process preemption penalty event.
Further, the step 2, is specifically included：
2a, process interrupt loss probability of happening model
2b, user perceive the equivalent probabilistic model that loss event loses event to process interrupt
Further, in step 2a, with the year process interruption times divided by sensitive equipment access point monitored of statistics
Year temporarily drop number, as a result as process interrupt loss the probability of happening.
Further, in step 2b, first according to monitoring gained physical parameter and voltage dip data, using segmented line
Property interpolation method draw PIT curves, calculate physical parameter offrating degree sV(T)；It is next assumed that user's sense temporarily drops in single
Know loss L (sV(T)) in sV(T) second dervative be present at=0, by L (sV(T)) in sV(T) Taylor expansion is carried out at=0, is ignored
It is divided by after higher order term with single pass preemption penalty, loss event is perceived using this ratio as single user process interrupt is lost
The Reliability equivalence factor θ of event；It is finally based on sV(T) and θ, the probability density function with reference to voltage dip characteristic value is established user and perceived
Loss event loses the equivalent probability of event to process interrupt.
Further, the step 3, probability of happening value is lost based on the inhomogeneity that step 2 calculates, calculated respectively in journey
Breakdown mistake is perceived with user and lost, and the two cumulative result obtains industrial process voltage dip economic loss.
The electrical characteristic of sensitive equipment, physical attribute and user are to different loss events when the application is based on voltage dip
Difference in perception the characteristics of, by voltage dip loss event be divided into process interrupt loss event and user perceive loss event,
Quantizing process preemption penalty and user perceive loss respectively；The application is when quantifying user's perception loss, integrated use VTC curves
The advantages of with PIT curves, the probabilistic model that physics parameter drift-out degree establishes Economic loss evaluation is added first, quantizing process is not
Preemption penalty, method have the characteristics of operability, strong applicability for industrial process voltage dip Economic loss evaluation.
One or more technical schemes that the application provides, have at least the following technical effects or advantages：
The invention provides a kind of voltage dip Economic loss evaluation based on electrical characteristic-physical attribute-perception loss
Method.Influenceed based on industrial process by temporary drop different degrees of, voltage dip loss is divided into process interrupt loss and user's sense
Know loss.Comprehensive utilization portray equipment electrical characteristic voltage-tolerance curve (voltage tolerance curve, VTC) and
Parameter immunization time (parameter immunity time, PIT) curve of physical attribute, assess user and perceive loss, herein
On the basis of add up based on investigation statisticses obtain industrial process preemption penalty, establish industrial process voltage dip Economic loss evaluation
Universal model, carry out voltage dip investment for user and administer to provide decision-making foundation.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention；
Fig. 1 temporarily drops loss event schematic diagram for production process voltage；
Fig. 2 is that schematic diagram is lost in electrical characteristic-physical parameter-perception；
Fig. 3 is the depicting method schematic diagram of electrical characteristic and physical attribute mapping relations；
Fig. 4 is voltage dip Economic loss evaluation flow chart；
Fig. 5 is certain high cleanliness factory HVAC system structure chart；
Fig. 6 is voltage dip schematic diagram at 2004-2006 blower fan supply terminals；
Fig. 7 is the PIT curve synoptic diagrams under different voltage dip amplitudes；
Fig. 8 is high cleanliness factory HVAC system voltage dip annual economical losses schematic diagram.
Embodiment
The invention provides a kind of voltage dip Economic loss evaluation method, solves existing voltage dip loss appraisal
The existing modeling of method only considers equipment electric state, does not consider process physical parameter, ignores the perceived process of user not
The technical problems such as preemption penalty, realize the technique effect for improving temporarily drop loss appraisal accuracy.
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Mode is applied the present invention is further described in detail.It should be noted that in the case where not conflicting mutually, the application's
Feature in embodiment and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be implemented using other different from the other modes in the range of being described herein, therefore, protection scope of the present invention is not by under
The limitation of specific embodiment disclosed in face.
Voltage dip Economic loss evaluation method of the present invention based on electrical characteristic-physical attribute-perception loss, main step
It is rapid as follows：
1) voltage dip loss event category result is obtained based on electrical characteristic-physical attribute-perception loss, based on VTC
Obtain losing quantization principles with PIT
A, voltage dip loss event category result is obtained based on electrical characteristic-physical attribute-perception loss；
When voltage dip causes equipment fault, production process structure or function missing, process interrupt, cause and without plan
The breakdown similar to during is lost caused by power failure to lose；When voltage dip does not result in equipment fault, during physical parameter can
Can be influenced to different extents, according to physical parameter degree of susceptibility, user will suffer from different degrees of loss.It will set herein
Standby non-failure, the uninterrupted loss event of process are defined as user and perceive loss event.Therefore, voltage dip loss event includes
Process interrupt loses event and user perceives loss event, such as Fig. 1.
In order to which more accurate evaluation user voltage dip loses, voltage dip loss event can be divided into：Equipment electrical characteristic,
The three parts, such as Fig. 2 such as physical attribute and perception loss.During generation voltage dip, in voltage magnitude (V)-duration (T) plane
On, the equipment that can determine whether to cause significantly sacrificing with equipment voltage-tolerance curve (voltage tolerance curve, VTC) is former
Barrier state, and CIGRE C4.110 recommend parameter immunization time (parameter immunity time, the PIT) curve used
More readily identify user when equipment electric state is difficult to judge and perceive loss.Therefore, it is different with reference to VTC and PIT curves, research
The general depicting method of VTC to PIT mapping principles in production process, assess user and perceive loss, with more reasonability.
B, obtain losing quantization principles based on VTC and PIT.
There is common sensitive equipment in production process：Contactor (ACC), programmable logic controller (PLC) (PLC) and variable-ratio drive
Dynamic device (ASD) etc..For this section by taking ASD as an example, other are similar.Generally, ASD is used to drive and controls band in production process Bu Tong to bear
The motor of load.Process engineer understands ASD drive systems by monitoring the physical parameters such as rotating speed, torque, pressure, pressure in real time
Working condition.
The VTC curves and PIT curves of ASD drive systems react electrical characteristic and physical attribute respectively.When load or technique
When different, mapping relations between the two are different, and especially when voltage dip is in the VTC ranges of indeterminacy, electric state is difficult to sentence
It is fixed, it is necessary to reflect economic loss that the working condition of ASD drive systems and production process are subjected to by physical parameter.It is sensitive
General depicting method such as Fig. 3 of the mapping relations of equipment electrical characteristic and physical attribute, is had by Fig. 3：
For voltage dip at VTC safety zones, physical parameter maintains normal value PPN, there is no the event of losing；
For voltage dip at VTC uncertain regions, different temporary declines correspond to different PIT curves, are subjected to identical
The PIT times corresponding to physical parameter level are different, i.e. V0→V1→V2→V3Under parameter immunization time be followed successively by PIT0→PIT1
→PIT2→PIT3.The different corresponding different users of physical parameter departure degree perceive loss event；
For voltage dip at VTC fault zones, physical parameter crosses limit value PPlimit, generating process preemption penalty event.
Therefore, loss can temporarily be dropped according to PIT curve assessments.
2) based on voltage dip loss event category result and loss quantization principles, inhomogeneity loss event is established respectively
Probabilistic model
A, process interrupt loss probability of happening model
With statistics year process interruption times divided by the sensitive equipment access point that monitors year temporary drop number, be as a result
The probability of happening is lost for process interrupt.
In formula,The probability of happening, N are lost for process interruptIntFor year process interruption times, NsagFor annual temporarily drop number.
B, user perceives the equivalent probabilistic model that loss event loses event to process interrupt
PIT curves can be drawn according to monitoring gained physical parameter PP and voltage dip data.When data deficiencies, can use
Piecewise linear interpolation method approaches PIT curves.Under given temporary decline V, if interpolation knot T=T0<T1<…<Tk<…<TaIt is corresponding
Physical parameter is：PP0, PP1..., PPk..., PPa, meet following relation：
In practice it is difficult to [0, Vmax] temporarily all PIT are monitored on drop section, δ can be pressed with formula (4)V=0.1 step-length will
Temporary decline is divided into b section, it is assumed that section [Vj-1, Vj] on PIT it is almost unchanged, with amplitude Vj-1Under physical parameter it is immune when
Between PITVj-1PIT values as the section.
Section [Tk, Tk+1] on use linear interpolation function[18]Determine PPk(T) value：
It is the PIT curve segmentation functions P under V to obtain temporary decline according to the linear interpolation function in each sectionV(T), obtain
Under the temporary decline physical parameter with T departure degree sV(T)：
In actual production, preferable physical parameter departure degree s0=0, actual departure degree sV(T), | sV(T)-s0|
Bigger, loss is bigger.Assuming that user temporarily drops in single perceives loss L (sV(T)) in s=s0There is second dervative in place, its Taylor expansion
Formula is：
Work as sV(T)=s0When L (sV(T)) minimalization 0, L (s0)=L'(s0)=0, while L (1)=CInt, ignore second order
Above higher order term obtains：
Define single user and perceive the Reliability equivalence factor θ that loss event loses event to process interrupt：
When voltage dip causes physical parameter departure degree to be more than λ (0<λ<1) after, user perceives loss event and occurred.Threshold
Value λ is determined by process engineer according to specific production technology, represents that the physical parameter that production process starts to suffer a loss deviates journey
Degree.
Work as sV(T)=λ when, when given temporary decline V can be tried to achieve by formula (5), occur user perceive loss event it is most short
Temporarily drop duration TV.Then user perceives the equivalent probability that loss event loses event to process interrupt under voltage dip amplitude VFor：
In formula, TmaxFor maximum occurrences of the temporarily drop duration in VTC uncertainties section, f (T) continues for voltage dip
Time probability density function, maximum entropy method can be used to determine.
The randomness of meter and voltage dip amplitude, then perceive loss event dependent on the user of temporary decline and duration
To process interrupt loss event equivalent probability be：
In formula, f (V) is voltage dip amplitude probability density function, can equally use maximum entropy method (MEM) to determine.
3) on the basis of the inhomogeneity loss probability of happening is drawn, industrial process voltage dip economic loss is calculated
The inhomogeneity loss probability of happening is substituted into formula (11), cumulative process preemption penalty is perceived with user and lost, and obtains work
Economic loss evaluation universal model temporarily drops in industry process voltage：
In formula, FInt、FNonRespectively process interrupt loss and user perceive loss；NsagFor annual temporarily drop number, CIntFor
The average loss interrupted every time；The probability of happening is lost for process interrupt；Loss event is perceived to process interrupt for user
The equivalent probability of loss event.
In formula (11), NsagIt can be obtained according to voltage dip Monitoring Data, CIntObtained according to process interrupt event statistics,WithIt is calculated according to step 2).
Voltage dip loss event is divided into the present invention into process interrupt loss event and user perceives loss event, examines simultaneously
Consider equipment electric state, process physical attribute and user and perceive loss, establish industrial process voltage dip loss evaluation model.
Using production process physical parameter changing rule, process of portraying does not interrupt the equally perceived loss of user, and institute's established model is more
Meet reality.Institute's extracting method not only can more accurately assess user's total losses, can also obtain with more refining process interrupt loss and
The uninterrupted user of process perceives loss, is invested for user and improvement activity provides more rich information.It is embodied
Flow chart is shown in Fig. 4.
Below with HVAC (the Heating Ventilation and Air of certain high cleanliness factory
Conditioning, HVAC) exemplified by system, the voltage dip economic loss that its 2004-2006 is subjected to is assessed.
4 Fans in the HVAC system are driven by ASD, for maintaining desinfection chamber and outside atmosphere static pressure difference, such as Fig. 5,
Blower fan is by 10kV/0.4kV Dyn11 transformer-supplieds.The 2004-2006 voltage dips obtained by monitoring on 10kV power supply buses,
Such as Fig. 6, ASD VTC uncertainties section is：[15ms,175ms]、[0.59p.u.,0.71p.u.].
The differential pressure indicator of HVAC system monitors physical parameter PP (desinfection chamber and outside atmosphere static pressure difference) in real time.According to national standard
GB50591-2010《Toilet constructs and acceptance specification》Regulation：Desinfection chamber should be greater than 10Pa, PP with outside atmosphere static pressure differencelimit
=10Pa, in addition, during blower fan normal operation, PPN=25Pa.According to monitoring gained physical parameter PP and voltage dip data, fortune
Corresponding PIT curves when obtaining different temporary decline V with interpolation method, such as Fig. 7.
In the high cleanliness factory HVAC system course of work, when voltage dip causes static pressure difference departure degree to be more than 35%
Afterwards, user is by different degrees of economic loss, therefore λ=0.35.The single preemption penalty C of the known processInt=25 ten thousand
Member.Gained 2004-2006 voltage dip annual economical losses results such as Fig. 8 is assessed with context of methods.As a result show, actual damage
Lose and be significantly greater than process interrupt loss, while consider that the result after preemption penalty and user's perception loss more meets reality, this card
It is bright, when user takes counter-measure, process interrupt problem is not only considered as, should more consider that process is not interrupted but causes user to feel
Know the voltage dip counter-measure of loss.
In summary, the present invention is commented based on the voltage dip economic loss that electrical characteristic-physical attribute-perception loss is established
Estimate model, voltage dip loss is divided into process interrupt loss and user perceives loss, equipment electrical characteristic is portrayed in comprehensive utilization
Voltage-tolerance curve (voltage tolerance curve, VTC) and physical attribute parameter immunization time (parameter
Immunity time, PIT) curve the advantages of, respectively quantify industrial process interrupt, the extent of damage of non-preemption penalty event.Energy
Effectively overcame estimation or deficient estimation problem, and process interrupt loss and user's perception loss can be obtained simultaneously, more suitable for work
Industry application.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
- A kind of 1. voltage dip Economic loss evaluation method, it is characterised in that methods described includes：Electrical characteristic, physical attribute based on sensitive equipment, loss acquisition voltage dip loss event category result is perceived, be based on The VTC curves and PIT curves of sensitive equipment obtain losing quantization principles；Based on voltage dip loss event category result and loss quantization principles, the probability mould that inhomogeneity loses event is established respectively Type；On the basis of the inhomogeneity loss probability of happening is drawn based on probabilistic model, industrial process voltage dip economy damage is calculated Lose.
- 2. voltage dip Economic loss evaluation method according to claim 1, it is characterised in that voltage dip loses event Classification includes：Process interrupt loses event and user perceives loss event.
- 3. voltage dip Economic loss evaluation method according to claim 2, it is characterised in that after voltage dip, if quick Feel equipment fault and production process is interrupted, then lose event for process interrupt；If the non-failure of sensitive equipment and production process not in It is disconnected, and physical parameter deviates, then loses event for process interrupt.
- 4. voltage dip Economic loss evaluation method according to claim 1, it is characterised in that voltage dip loses event It is divided into：Equipment electrical characteristic, physical attribute and perception loss three parts.
- 5. voltage dip Economic loss evaluation method according to claim 1, it is characterised in that based on sensitive equipment The depicting method of VTC curves and PIT curve mapping relations, specify voltage dip loss quantization principles.
- 6. voltage dip Economic loss evaluation method according to claim 2, it is characterised in that lose the probability mould of event Type includes：Process interrupt loses probability of happening model and user perceives the equivalent probability that loss event loses event to process interrupt Model.
- 7. voltage dip Economic loss evaluation method according to claim 6, it is characterised in that during the year with statistics The year of disconnected number divided by the sensitive equipment access point monitored number temporarily drops, as a result as process interrupt loses the probability of happening.
- 8. voltage dip Economic loss evaluation method according to claim 6, it is characterised in that first according to monitoring gained Physical parameter and voltage dip data, PIT curves are drawn using piecewise linear interpolation method, calculate physical parameter offrating Degree sV(T)；It is then assumed that user temporarily drops in single perceives loss L (sV(T)) in sV(T) second dervative be present at=0, by L (sV (T)) in sV(T) at=0 carry out Taylor expansion, be divided by after ignoring higher order term with single pass preemption penalty, using this ratio as Single user perceives the Reliability equivalence factor θ that loss event loses event to process interrupt；It is finally based on sV(T) it is and θ, temporary with reference to voltage The probability density function of drop characteristic value establishes user and perceives the equivalent probability that loss event loses event to process interrupt.
- 9. voltage dip Economic loss evaluation method according to claim 2, it is characterised in that based on the difference calculated Class loses probability of happening value, calculates journey preemption penalty respectively and perceives loss with user, the two cumulative result obtains industrial process electricity Economic loss temporarily drops in pressure.
- 10. voltage dip Economic loss evaluation method according to claim 5, it is characterised in that based on sensitive equipment VTC curves and the depicting method of PIT curve mapping relations include：For voltage dip at VTC safety zones, physical parameter maintains normal value PPN, there is no the event of losing；For voltage dip at VTC uncertain regions, different temporary declines correspond to different PIT curves, with identical acceptable physics The PIT times corresponding to parameter level are different, and the different corresponding different users of physical parameter departure degree perceive loss event；For voltage dip at VTC fault zones, physical parameter crosses limit value PPlimit, generating process preemption penalty event.
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| CN108919003A (en) * | 2018-07-06 | 2018-11-30 | 华北电力大学 | A kind of test of sensitive equipment voltage dip resistance characteristics and data processing method |
| CN109146319A (en) * | 2018-09-12 | 2019-01-04 | 四川大学 | A method of voltage dip type is calculated based on Euclidean distance method |
| CN109950910A (en) * | 2019-04-23 | 2019-06-28 | 福州大学 | A kind of voltage dip of Kernel-based methods parameter immunization time extenuates method |
| CN110112713A (en) * | 2019-05-14 | 2019-08-09 | 南京工程学院 | A kind of voltage dip loss appraisal method considering operating time of protection |
| CN110376418A (en) * | 2019-06-18 | 2019-10-25 | 国网上海市电力公司 | Based on the voltage dip comprehensive assessment index acquisition methods for improving characteristic quantity description |
| CN112115582A (en) * | 2020-08-14 | 2020-12-22 | 国网宁夏电力有限公司中卫供电公司 | Method, medium and system for evaluating influence of voltage sag on coal-to-liquid production line |
| CN113642186A (en) * | 2021-08-20 | 2021-11-12 | 国网福建省电力有限公司 | Power supply reliability quantitative evaluation method considering voltage sag |
| CN114154798A (en) * | 2021-11-08 | 2022-03-08 | 深圳供电局有限公司 | Voltage sag risk analysis method and device, computer equipment and storage medium |
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| CN108764666A (en) * | 2018-05-15 | 2018-11-06 | 国网上海市电力公司 | Economic loss evaluation method temporarily drops in the user based on multimass loss function synthesis |
| CN108919003A (en) * | 2018-07-06 | 2018-11-30 | 华北电力大学 | A kind of test of sensitive equipment voltage dip resistance characteristics and data processing method |
| CN108919003B (en) * | 2018-07-06 | 2020-10-23 | 华北电力大学 | Sensitive equipment voltage sag tolerance characteristic testing and data processing method |
| CN109146319A (en) * | 2018-09-12 | 2019-01-04 | 四川大学 | A method of voltage dip type is calculated based on Euclidean distance method |
| CN109950910A (en) * | 2019-04-23 | 2019-06-28 | 福州大学 | A kind of voltage dip of Kernel-based methods parameter immunization time extenuates method |
| CN109950910B (en) * | 2019-04-23 | 2022-06-17 | 福州大学 | Voltage sag reduction method based on process parameter immune time |
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| CN110376418A (en) * | 2019-06-18 | 2019-10-25 | 国网上海市电力公司 | Based on the voltage dip comprehensive assessment index acquisition methods for improving characteristic quantity description |
| CN112115582A (en) * | 2020-08-14 | 2020-12-22 | 国网宁夏电力有限公司中卫供电公司 | Method, medium and system for evaluating influence of voltage sag on coal-to-liquid production line |
| CN113642186A (en) * | 2021-08-20 | 2021-11-12 | 国网福建省电力有限公司 | Power supply reliability quantitative evaluation method considering voltage sag |
| CN113642186B (en) * | 2021-08-20 | 2023-08-01 | 国网福建省电力有限公司 | Power supply reliability quantitative evaluation method considering voltage sag |
| CN114154798A (en) * | 2021-11-08 | 2022-03-08 | 深圳供电局有限公司 | Voltage sag risk analysis method and device, computer equipment and storage medium |
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