CN110009203A - Method and system for evaluating loss of voltage sag electric quantity - Google Patents
Method and system for evaluating loss of voltage sag electric quantity Download PDFInfo
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Abstract
The invention provides a method and a system for evaluating loss of voltage sag electric quantity, wherein the method comprises the following steps: counting the voltage sag power failure times of different types of power distribution networks in a research area within set time; counting the number of power supply users and the number of power failure users of the power distribution network in a set time in a research area, and calculating the power failure degree of different types of voltage sag users; calculating different types of voltage sag weight factors according to the voltage sag power failure times of different types of power distribution networks and the power failure degrees of different types of voltage sag users; calculating the electric quantity loss of a single-user single-time voltage sag power failure according to the power of the power distribution network before the voltage sag power failure, the power of the power distribution network after the voltage sag power failure and the duration of the user voltage sag power failure; calculating the expected value of the electric quantity loss of different types of voltage sag; and calculating the loss of the voltage sag electric quantity of the power supply system. The invention can accurately evaluate the electric quantity loss of the power supply system caused by voltage sag, and has high engineering operability.
Description
Technical field
The present invention relates to technical field of electric power more particularly to a kind of appraisal procedures and system of voltage dip electric quantity loss.
Background technique
It is more and more using the user of sensitive load in power grid with science and technology and expanding economy, power quality is proposed
Increasingly higher demands cause people's great attention.Wherein voltage dip is the main of influence electrical equipment normal operation
Power quality problem.Accuracy and engineering operability of the conventional method mainly by means such as economic loss investigation, mathematical evaluations
It is low.
Summary of the invention
In order to solve the above technical problems, the present invention provides the appraisal procedure and system of a kind of voltage dip electric quantity loss, it can
With the electric quantity loss of power supply system caused by accurate evaluation voltage dip, and it is high to be engineered operability.
A kind of appraisal procedure of voltage dip electric quantity loss provided by the invention, includes the following steps:
Frequency of power cut temporarily drops in the different type distribution network voltage of statistical research region within the set time；
Customer interrupted number temporarily drops in statistical research region power supply number of users within the set time and distribution network voltage, and according to
Customer interrupted number temporarily drops in the power supply number of users and the distribution network voltage, calculates different type voltage dip user power failure journey
Degree；
Frequency of power cut is temporarily dropped according to the different type distribution network voltage and the different type voltage dip user stops
Electric degree calculates different type voltage dip weight factor；
Power and user's voltage dip after power failure temporarily drop in power, distribution network voltage before temporarily dropping power failure according to distribution network voltage
Interruption duration calculates the electric quantity loss that single user's single voltage dip has a power failure；
Frequency of power cut temporarily drops according to the different type distribution network voltage, single user's single voltage dip has a power failure
Electric quantity loss and the different type voltage dip weight factor calculate the electric quantity loss expectation of different type voltage dip
Value；
According to the electric quantity loss desired value of the different type voltage dip, power supply system voltage dip electricity damage is calculated
It loses.
Preferably, further include following step:
Number temporarily drops in the different type distribution network voltage of statistical research region within the set time, further according to the inhomogeneity
Number temporarily drops in type distribution network voltage and frequency of power cut temporarily drops in the different type distribution network voltage, calculates different type power distribution network electricity
Power failure probability temporarily drops in pressure.
Preferably, each type voltage temporarily drop user's power failure degree be the type distribution network voltage temporarily drop customer interrupted number with
The ratio of the power supply number of users.
Preferably, it is the type voltage dip user's power failure degree and voltage dip that weight factor temporarily drops in each type voltage
The ratio of user's power failure level average values, the voltage dip user power failure level average values are different type voltage dip user
The ratio of frequency of power cut summation, temporarily drops with different type distribution network voltage in power failure degree summation.
Preferably, the electric quantity loss that single user's single voltage dip has a power failure is power difference and user's voltage dip
Product between interruption duration, the power difference are that power and the power distribution network before power failure temporarily drop in the distribution network voltage
Difference after voltage dip has a power failure between power.
The present invention also provides a kind of assessment systems of voltage dip electric quantity loss, comprising:
Frequency of power cut statistical module is temporarily dropped for the different type distribution network voltage of statistical research region within the set time
Frequency of power cut；
Power failure scale evaluation module, for the power supply number of users and distribution network voltage of statistical research region within the set time
Temporarily drop customer interrupted number, and customer interrupted number is temporarily dropped according to the power supply number of users and the distribution network voltage, calculate inhomogeneity
Type voltage dip user's power failure degree；
Weight factor evaluation module, for according to the different type distribution network voltage temporarily drop frequency of power cut and it is described not
Same type voltage dip user's power failure degree calculates different type voltage dip weight factor；
Single user's single electric quantity loss evaluation module, for temporarily dropping power failure preceding power, power distribution network according to distribution network voltage
Power and user's voltage dip interruption duration after voltage dip has a power failure calculate what single user's single voltage dip had a power failure
Electric quantity loss；
Electric quantity loss desired value evaluation module, for temporarily dropping frequency of power cut, institute according to the different type distribution network voltage
Electric quantity loss and the different type voltage dip weight factor, the calculating for stating the power failure of single user's single voltage dip are different
The electric quantity loss desired value that type voltage temporarily drops；
Power supply system electric quantity loss evaluation module, for it is expected according to the electric quantity loss of the different type voltage dip
Value calculates power supply system voltage dip electric quantity loss.
Preferably, the frequency of power cut statistical module is also used to the different type of statistical research region within the set time
Number temporarily drops in distribution network voltage, temporarily drops number and different type power distribution network electricity further according to the different type distribution network voltage
Temporarily power failure probability temporarily drops to pressure in drop frequency of power cut, calculating different type distribution network voltage.
Preferably, each type voltage temporarily drop user's power failure degree be the type distribution network voltage temporarily drop customer interrupted number with
The ratio of the power supply number of users.
Preferably, it is the type voltage dip user's power failure degree and voltage dip that weight factor temporarily drops in each type voltage
The ratio of user's power failure level average values, the voltage dip user power failure level average values are different type voltage dip user
The ratio of frequency of power cut summation, temporarily drops with different type distribution network voltage in power failure degree summation.
Preferably, the electric quantity loss that single user's single voltage dip has a power failure is power difference and user's voltage dip
Product between interruption duration, the power difference are that power and the power distribution network before power failure temporarily drop in the distribution network voltage
Difference after voltage dip has a power failure between power.
The invention has the following beneficial effects: calculating different type voltage dip weight factor and single user
The electric quantity loss that single voltage dip has a power failure, temporarily drops frequency of power cut, single user's single further according to different type distribution network voltage
The electric quantity loss and different type voltage dip weight factor that voltage dip has a power failure, calculate the electricity of different type voltage dip
Expected shortfall；According to the electric quantity loss desired value of different type voltage dip, power supply system voltage dip electric quantity loss is calculated.
The present invention can be in conjunction with sensitive users power-off condition during voltage dip, the electric quantity loss for causing sensitive users to have a power failure voltage dip
It is assessed, the electric quantity loss that voltage dip causes power supply system is assessed according to user's electric quantity loss, it can be with accurate evaluation voltage
The temporarily electric quantity loss of power supply system caused by drop, and needing the assessment parameter obtained is all directly accurately to obtain from power supply system
It takes, therefore it is high to be engineered operability.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow chart of the appraisal procedure of voltage dip electric quantity loss provided by the invention.
Specific embodiment
The present invention provides a kind of appraisal procedure of voltage dip electric quantity loss, as shown in Figure 1, it includes the following steps:
Frequency of power cut temporarily drops in the different type distribution network voltage of statistical research region within the set time；
Customer interrupted number temporarily drops in statistical research region power supply number of users within the set time and distribution network voltage, and according to
Customer interrupted number temporarily drops in power supply number of users and distribution network voltage, calculates different type voltage dip user power failure degree；
Frequency of power cut and different type voltage dip user's power failure degree are temporarily dropped according to different type distribution network voltage, is counted
Calculate different type voltage dip weight factor；
Power and user's voltage dip after power failure temporarily drop in power, distribution network voltage before temporarily dropping power failure according to distribution network voltage
Interruption duration calculates the electric quantity loss that single user's single voltage dip has a power failure；User's voltage dip interruption duration
Specifically: average active power restores to 80% institute of average active power having a power failure in first 5 minutes after power failure temporarily drops in utilization voltage
Use the time.Power before power failure temporarily drops in distribution network voltage specifically: the average wattful power that user's voltage dip has a power failure in first 5 minutes
Rate.Power after power failure temporarily drops in distribution network voltage specifically: user's voltage dip outage active power mean value.
According to the electric quantity loss that frequency of power cut temporarily drops in different type distribution network voltage, single user's single voltage dip has a power failure
And different type voltage dip weight factor, calculate the electric quantity loss desired value of different type voltage dip；
According to the electric quantity loss desired value of different type voltage dip, power supply system voltage dip electric quantity loss is calculated.
Further, the appraisal procedure of voltage dip electric quantity loss further includes following step:
Number temporarily drops in the different type distribution network voltage of statistical research region within the set time, matches further according to different type
Number temporarily drops in network voltage and frequency of power cut temporarily drops in different type distribution network voltage, calculates different type distribution network voltage and temporarily drops and stops
Electric probability.It is that the type distribution network voltage temporarily drops frequency of power cut and matches with the type that power failure probability temporarily drops in each type distribution network voltage
The ratio of number temporarily drops in network voltage.Here it is possible to calculate after power failure probability temporarily drops in a certain type distribution network voltage, this is utilized
The voltage dip number of probability and other power distribution networks within the set time calculates other each type distribution network voltages and temporarily drops and stops
Electric number；It is that power failure probability and power distribution network electricity temporarily drop in the distribution network voltage that frequency of power cut temporarily drops in other each type distribution network voltages
The product of number temporarily drops in pressure.
Further, it is such that user's power failure degree temporarily drops in each type voltage of the appraisal procedure of voltage dip electric quantity loss
The ratio of customer interrupted number and number of users of powering temporarily drops in type distribution network voltage.
It is that the type voltage dip user's power failure degree is stopped with voltage dip user that weight factor temporarily drops in each type voltage
The ratio of electric level average values, voltage dip user's power failure level average values are that different type voltage dip user power failure degree is total
With the ratio of frequency of power cut summation is temporarily dropped with different type distribution network voltage.
When the electric quantity loss that single user's single voltage dip has a power failure is power difference and lasting user's voltage dip power failure
Between between product, power difference be distribution network voltage temporarily drop power and distribution network voltage before power failure temporarily drop have a power failure after between power
Difference.
The electric quantity loss desired value that each type voltage temporarily drops is that the power failure electricity of each user's voltage dip of the type damages
The sum of desired value, and the power failure electric quantity loss desired value of each user's voltage dip of the type are lost, is the type distribution network voltage
It temporarily drops between number, the electric quantity loss that single user's single voltage dip has a power failure and the type voltage dip weight factor three
Product.
Power supply system voltage dip electric quantity loss is the summation of the electric quantity loss desired value of different type voltage dip.
The present invention also provides a kind of assessment systems of voltage dip electric quantity loss, and the system is corresponding with above-mentioned method,
The system includes: frequency of power cut statistical module, power failure scale evaluation module, weight factor evaluation module, single user's single electricity
Measure loss appraisal module, electric quantity loss desired value evaluation module, power supply system electric quantity loss evaluation module.
Frequency of power cut statistical module is temporarily dropped for the different type distribution network voltage of statistical research region within the set time
Frequency of power cut；
Power failure scale evaluation module is used for the power supply number of users and distribution network voltage of statistical research region within the set time
Temporarily drop customer interrupted number, and customer interrupted number is temporarily dropped according to power supply number of users and distribution network voltage, it is temporary to calculate different type voltage
User's power failure degree drops；
Weight factor evaluation module is used to temporarily drop frequency of power cut and different type electricity according to different type distribution network voltage
User's power failure degree temporarily drops in pressure, calculates different type voltage dip weight factor；
Single user's single electric quantity loss evaluation module, for temporarily dropping power failure preceding power, power distribution network according to distribution network voltage
Power and user's voltage dip interruption duration after voltage dip has a power failure calculate what single user's single voltage dip had a power failure
Electric quantity loss；
Electric quantity loss desired value evaluation module is used to temporarily drop frequency of power cut, single user according to different type distribution network voltage
The electric quantity loss and different type voltage dip weight factor that single voltage dip has a power failure, calculate different type voltage dip
Electric quantity loss desired value；
Power supply system electric quantity loss evaluation module is used for the electric quantity loss desired value according to different type voltage dip, calculates
Power supply system voltage dip electric quantity loss.
Further, frequency of power cut statistical module is also used to the different type distribution of statistical research region within the set time
Net voltage dip number temporarily drops number and different type distribution network voltage further according to different type distribution network voltage and temporarily drops power failure time
Number calculates different type distribution network voltage and temporarily drops power failure probability.
It is that customer interrupted number temporarily drops in the type distribution network voltage and power supply is used that user's power failure degree temporarily drops in each type voltage
The ratio of amount.
It is that the type voltage dip user's power failure degree is stopped with voltage dip user that weight factor temporarily drops in each type voltage
The ratio of electric level average values, voltage dip user's power failure level average values are that different type voltage dip user power failure degree is total
With the ratio of frequency of power cut summation is temporarily dropped with different type distribution network voltage.
When the electric quantity loss that single user's single voltage dip has a power failure is power difference and lasting user's voltage dip power failure
Between between product, power difference be distribution network voltage temporarily drop power and distribution network voltage before power failure temporarily drop have a power failure after between power
Difference.
The electric quantity loss that present invention combination voltage dip causes user to have a power failure proposes a kind of voltage dip electric quantity loss
Appraisal procedure and system are lost caused by directly can assessing voltage dip according to user's electric quantity loss.
The present invention can cause sensitive users to have a power failure voltage dip in conjunction with sensitive users power-off condition during voltage dip
Electric quantity loss is assessed, and arranges the formulation of scheme to provide theory support for voltage dip improvement.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (10)
1. a kind of appraisal procedure of voltage dip electric quantity loss, which is characterized in that include the following steps:
Frequency of power cut temporarily drops in the different type distribution network voltage of statistical research region within the set time；
Customer interrupted number temporarily drops in statistical research region power supply number of users within the set time and distribution network voltage, and according to described
Customer interrupted number temporarily drops in power supply number of users and the distribution network voltage, calculates different type voltage dip user power failure degree；
According to the different type distribution network voltage, frequency of power cut and the different type voltage dip user power failure journey temporarily drop
Degree calculates different type voltage dip weight factor；
Power and the power failure of user's voltage dip after power failure temporarily drop in power, distribution network voltage before temporarily dropping power failure according to distribution network voltage
Duration calculates the electric quantity loss that single user's single voltage dip has a power failure；
According to the electricity that frequency of power cut temporarily drops in the different type distribution network voltage, single user's single voltage dip has a power failure
Loss and the different type voltage dip weight factor calculate the electric quantity loss desired value of different type voltage dip；
According to the electric quantity loss desired value of the different type voltage dip, power supply system voltage dip electric quantity loss is calculated.
2. the appraisal procedure of voltage dip electric quantity loss according to claim 1, which is characterized in that further include following steps
It is rapid:
Number temporarily drops in the different type distribution network voltage of statistical research region within the set time, matches further according to the different type
Number temporarily drops in network voltage and frequency of power cut temporarily drops in the different type distribution network voltage, and it is temporary to calculate different type distribution network voltage
Power failure probability drops.
3. the appraisal procedure of voltage dip electric quantity loss according to claim 1, which is characterized in that each type voltage is temporary
Drop user's power failure degree is the ratio that customer interrupted number and the power supply number of users temporarily drop in the type distribution network voltage.
4. the appraisal procedure of voltage dip electric quantity loss according to claim 1, which is characterized in that each type voltage is temporary
The ratio that weight factor is the type voltage dip user's power failure degree and voltage dip user power failure level average values drops, and it is described
Voltage dip user's power failure level average values are different type voltage dip user power failure degree summation, with different type power distribution network
The ratio of voltage dip frequency of power cut summation.
5. the appraisal procedure of voltage dip electric quantity loss according to claim 1, which is characterized in that the single user is single
Product of the electric quantity loss that secondary voltage dip has a power failure between power difference and user's voltage dip interruption duration, the function
Rate difference be the distribution network voltage temporarily drop have a power failure before power and the distribution network voltage difference after power failure between power temporarily drops.
6. a kind of assessment system of voltage dip electric quantity loss characterized by comprising
Frequency of power cut statistical module temporarily drops power failure for the different type distribution network voltage of statistical research region within the set time
Number；
Power failure scale evaluation module is temporarily dropped for statistical research region power supply number of users within the set time and distribution network voltage
Customer interrupted number, and customer interrupted number is temporarily dropped according to the power supply number of users and the distribution network voltage, calculate different type electricity
User's power failure degree temporarily drops in pressure；
Weight factor evaluation module, for temporarily dropping frequency of power cut and the inhomogeneity according to the different type distribution network voltage
Type voltage dip user's power failure degree calculates different type voltage dip weight factor；
Single user's single electric quantity loss evaluation module, for temporarily dropping power failure preceding power, distribution network voltage according to distribution network voltage
Power and user's voltage dip interruption duration after temporarily drop has a power failure calculate the electricity that single user's single voltage dip has a power failure
Loss；
Electric quantity loss desired value evaluation module, for temporarily dropping frequency of power cut, the list according to the different type distribution network voltage
The electric quantity loss and the different type voltage dip weight factor that a user's single voltage dip has a power failure, calculate different type
The electric quantity loss desired value of voltage dip；
Power supply system electric quantity loss evaluation module, for the electric quantity loss desired value according to the different type voltage dip, meter
Calculate power supply system voltage dip electric quantity loss.
7. the assessment system of voltage dip electric quantity loss according to claim 6, which is characterized in that the frequency of power cut system
Module is counted, the different type distribution network voltage of statistical research region within the set time is also used to and temporarily drops number, further according to described
Number temporarily drops in different type distribution network voltage and frequency of power cut temporarily drops in the different type distribution network voltage, calculates different type and matches
Power failure probability temporarily drops in network voltage.
8. the assessment system of voltage dip electric quantity loss according to claim 6, which is characterized in that each type voltage is temporary
Drop user's power failure degree is the ratio that customer interrupted number and the power supply number of users temporarily drop in the type distribution network voltage.
9. the assessment system of voltage dip electric quantity loss according to claim 6, which is characterized in that each type voltage is temporary
The ratio that weight factor is the type voltage dip user's power failure degree and voltage dip user power failure level average values drops, and it is described
Voltage dip user's power failure level average values are different type voltage dip user power failure degree summation, with different type power distribution network
The ratio of voltage dip frequency of power cut summation.
10. the assessment system of voltage dip electric quantity loss according to claim 6, which is characterized in that the single user
Product of the electric quantity loss that single voltage dip has a power failure between power difference and user's voltage dip interruption duration, it is described
Power difference be the distribution network voltage temporarily drop have a power failure before power and the distribution network voltage difference after power failure between power temporarily drops
Value.
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| CN110009203B (en) | 2022-11-25 |
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