CN110766295B - Method for analyzing reliability improvement scheme of power distribution system - Google Patents
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Abstract
The invention provides a method for analyzing a power distribution system reliability improvement scheme, which comprises the following steps: acquiring lifting measures for improving the reliability of a power distribution system, the priority of the lifting measures and the target average power failure time of the power distribution system; acquiring basic parameters of a power distribution system and a line wiring mode of the power distribution system, and calculating initial average power failure time of the power distribution system before the lifting measures are not used; calculating the average power failure time variation of the power distribution system corresponding to each lifting measure; and determining the reliability lifting scheme of the power distribution system according to the priority of the lifting measure, the target power failure time of the power distribution system, the initial average power failure time of the power distribution system and the average power failure time variation of the power distribution system. The invention improves the accuracy of determining the lifting measure and improves the reliability of the power distribution system.
Description
Technical Field
The invention relates to the technical field of power distribution systems, in particular to a method for analyzing a power distribution system reliability improvement scheme.
Background
The power supply reliability refers to the capability of the power supply system for continuously supplying power, is an important index for checking the power quality of the power supply system, reflects the satisfaction degree of the power industry on the national economic power demand, and becomes one of the standards for measuring the national economic development degree. The reliability of power supply is an important index of the state of the art of power distribution systems. How to improve the reliability of the power distribution system is a technical problem which needs to be solved at present.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for analyzing a power distribution system reliability improvement scheme so as to improve the reliability of the power distribution system.
In order to solve the technical problems, the invention provides a method for analyzing a power distribution system reliability improvement scheme, which comprises the following steps:
acquiring lifting measures for improving the reliability of a power distribution system, the priority of the lifting measures and the target average power failure time of the power distribution system;
acquiring basic parameters of a power distribution system and a line wiring mode of the power distribution system, and calculating initial average power failure time of the power distribution system before the lifting measures are not used;
calculating the average power failure time variation of the power distribution system corresponding to each lifting measure;
and determining the reliability lifting scheme of the power distribution system according to the priority of the lifting measure, the target power failure time of the power distribution system, the initial average power failure time of the power distribution system and the average power failure time variation of the power distribution system.
Wherein the lifting means comprises: the power distribution automation transformation, the power distribution system self-healing control technology improvement, the power distribution system situation awareness technology improvement, the comprehensive power failure management measure improvement and the power distribution system equipment updating;
the priority of the lifting measures is from high to low:
and the comprehensive power failure management measures are improved, the distribution automation is improved, the distribution system self-healing control technology is improved, the distribution system situation awareness technology is improved, and the distribution system equipment is updated.
The method for obtaining the basic parameters of the power distribution system and the line wiring modes of the power distribution system and calculating the initial average power failure time of the power distribution system before the lifting measures are not used specifically comprises the following steps:
acquiring a feeder line rotatable supply capacity, a feeder line total capacity and a distribution system line wiring mode, calculating a distribution system line rotatable supply rate according to the feeder line rotatable supply capacity and the feeder line total capacity, and calculating a distribution system line segmentation number according to the distribution system line wiring mode;
calculating the upstream user ratio, the downstream user ratio, the user ratio and the line calculation power-off section upstream power-off time, downstream power-off time and the planned power-off section power-off time of a line planned power-off section according to the line segmentation number and the line wiring mode, and calculating the line planned average power-off time according to the user ratio and the power-off time;
calculating the upstream user duty ratio, the downstream user duty ratio, the line fault section upstream power-off time, the downstream power-off time and the line fault section power-off time of the line fault section, and calculating the line fault average power-off time according to the user duty ratio and the power-off time;
and calculating the average power failure time of the power distribution system according to the planned average power failure time of the line and the average power failure time of the line fault.
The power distribution system line transfer rate is calculated according to the feeder line transfer capacity and the total feeder line capacity, and is specifically as follows:
line transfer rate = feeder availability capacity multiplied by feeder total capacity;
the method for calculating the number of the line segments of the power distribution system according to the line wiring mode comprises the following steps:
if the distribution system line wiring mode is an overhead line, the line sectionalizing number=sectionalizing switch number plus one;
if the distribution system circuit architecture is a cable circuit, the circuit segmentation number=the ring main unit number plus one.
Wherein the line planning blackout section upstream user duty ratio= (line segment number-1)/(2 x line segment number);
if the line connection mode is a cable line, the downstream user ratio of the line planned outage section=the line transfer rate x (the number of overhead line segments-1)/(the number of 2 x cable line segments);
the user duty ratio of the line planning power outage section=1-the upstream user duty ratio of the line planning power outage section-the downstream user duty ratio of the line planning power outage section;
upstream power outage time of the line planning power outage section=fault location time+fault interval time;
the downstream power failure time of the line planning power failure section=fault positioning time+fault isolation time+power distribution system transfer time;
the power failure time of the line planned power failure section=fault positioning time+fault isolation time+planned maintenance repair time;
the line planned average outage time=line planned outage rate× (line planned outage section upstream user occupancy rate×line planned outage section upstream outage time+line planned outage section downstream user occupancy rate×line planned outage section downstream outage time+line planned outage section user occupancy rate×line planned outage section outage time).
The method comprises the steps of calculating the upstream user duty ratio, the downstream user duty ratio, the line fault section upstream power failure time, the downstream power failure time and the line fault section power failure time of a line fault section, and calculating the line fault average power failure time according to the user duty ratio and the power failure time, wherein the method comprises the following steps:
line fault section upstream user duty = (line segment number-1)/(2 x line segment number);
if the fault line wiring mode is an overhead line, the downstream user ratio of the line fault section=the line transfer rate× (overhead line segment number-1)/(2×overhead line segment number), and if the fault line wiring mode is an overhead line, the downstream user ratio of the line fault section=the line transfer rate× (cable line segment number-1)/(2×cable line segment number);
the line fault section user duty cycle = 1-line fault section upstream user duty cycle-line fault section downstream user duty cycle;
upstream power failure time of the line fault section=fault location time+fault isolation time;
line fault section downstream outage time = fault location time + fault isolation time + distribution system transfer time;
line fault section power failure time = fault location time + fault isolation time + scheduled maintenance repair time;
line fault average outage time = line fault rate x (line fault section upstream user occupancy x line fault section upstream outage time + line fault section downstream user occupancy x line fault section downstream outage time + line fault section user occupancy x line fault section outage time).
The power distribution system average power failure time calculation method based on the line planning average power failure time and the line fault average power failure time specifically comprises the following steps:
calculating the average power failure time of each loop according to the line planning average power failure time and the line fault average power failure time;
and calculating the average power failure time of the power distribution system according to the average power failure time of each loop line.
The calculating the average power failure time change of the power distribution system corresponding to each lifting measure specifically comprises the following steps:
acquiring corresponding parameters of each lifting measure affecting the reliability of the power distribution system and the variation of the corresponding parameters;
and calculating the average power failure time variation of the power distribution system corresponding to each measure according to the variation of the parameter corresponding to each lifting measure.
The power distribution system reliability improvement scheme is determined according to the priority of the improvement measures, the target power failure time of the power distribution system, the initial average power failure time of the power distribution system and the average power failure time variation of the power distribution system, and specifically comprises the following steps:
and according to the sequence of the priority of the lifting measures from high to low, checking the average power failure time variation of the power distribution system corresponding to each lifting measure in sequence until the checking condition is met, wherein all substituted lifting measures are the final scheme for improving the reliability of the power distribution system.
Wherein, the judging conditions are as follows: and the difference value between the initial average power failure time of the power distribution system and the sum of the average power failure time variation amounts of the power distribution system corresponding to the lifting measures which sequentially participate in verification is not larger than the target average power failure time of the power distribution system.
The embodiment of the invention has the beneficial effects that: according to the embodiment of the invention, the lifting measures, the priorities of the lifting measures and the average power outage time variation of the power distribution system corresponding to each lifting measure are obtained, and whether the corresponding measures and the combination thereof meet the target power outage time of the power distribution system or not is checked in sequence according to the priorities of the lifting measures, so that a corresponding lifting scheme is obtained. The method combines the reliability lifting measures, the reliability parameters and the reliability index 3-layer variables of the power distribution system, and can quantify the influence factors among the 3-layer variables, so that the change sensitivity of the reliability parameters is calculated under the given reliability index target, and finally, an implementation scheme combination strategy of the reliability lifting measures is provided.
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In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a method for analyzing a power distribution system reliability improvement scheme according to an embodiment of the present invention.
Fig. 2 is a schematic flowchart of step S2 of a method for analyzing a reliability improvement scheme of a power distribution system according to a first embodiment of the present invention.
Detailed Description
The following description of embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced.
Referring to fig. 1, a method for analyzing a reliability improvement scheme of a power distribution system according to an embodiment of the present invention includes the following steps:
s1, acquiring lifting measures for improving the reliability of the power distribution system, the priority of the lifting measures and the target average power failure time of the power distribution system.
The implementation of the reliability improvement measures changes reliability parameters and further changes reliability indexes, and the reliability improvement measures mainly comprise five items of distribution automation improvement, self-healing control technology improvement, situation awareness technology improvement, comprehensive power failure management measure improvement and equipment updating. According to the full life cycle principle of equipment in a power distribution system and implementation cost of different reliability lifting strategies, the descending order of the priority degree of the reliability lifting measures is calculated as follows: and (3) improving comprehensive power outage management measures, improving distribution automation transformation, improving self-healing control technology, improving situation awareness technology and updating equipment.
S2, acquiring basic parameters of the power distribution system and line wiring modes of the power distribution system, and calculating initial average power failure time of the power distribution system before the lifting measures are not used.
As shown in fig. 2, the step S2 specifically includes:
s21, acquiring the transferable capacity of the feeder, the total capacity of the feeder and the wiring mode of the power distribution system line, calculating the transfer rate of the power distribution system line according to the transferable capacity of the feeder and the total capacity of the feeder, and calculating the number of segments of the power distribution system line according to the wiring mode of the power distribution system line.
Specifically, the basic parameters of the power distribution system are the calculation basis for calculating the reliability parameters and indexes. The basic parameters of the power distribution system comprise line transfer rate, feeder line transfer capacity, feeder line total capacity, line segmentation number, segmentation switch number and ring main unit (switching station) number.
Specifically, the line transfer rate is calculated as follows: line transfer rate = feeder availability capacity/total feeder capacity.
Specifically, according to different line connection modes of the overhead line and the cable line, the following 2 calculation methods are available for the number of line segments.
When the wiring mode of the line is an overhead line: line segment number = overhead line segment number = segment switch number +1
When the wiring mode is cable wiring: line segment number=cable line segment number=ring main unit (switching station) number+1.
S22, calculating the upstream user ratio, the downstream user ratio, the user ratio and the line of the planned power outage section according to the number of line segments and the line wiring mode, calculating the upstream power outage time, the downstream power outage time and the planned power outage time of the power outage section, and calculating the planned average power outage time of the line according to the user ratio and the power outage time.
The line planning average power failure time is a basis for calculating the reliability index distribution system average power failure time, and comprises three parts of user occupation ratios of different planning power failure sections, power failure time of different planning power failure sections, line planning average power failure time and the like. According to the different influences of the line planned outage on the user outage at different positions in the line, the line installation users can be divided into an upstream line planned outage section, a downstream line planned outage section and a line planned outage section. And respectively calculating the average duty ratio of the three types of regional users:
upstream user duty ratio of line planning power outage section= (line segment number-1)/(2 x line segment number)
And calculating the downstream user duty ratio of the planned outage section. According to different line wiring modes of the overhead line and the cable line, the downstream user ratio of the planned power failure section has the following 2 calculation modes:
if the line wiring mode is an overhead line, the downstream user duty ratio of the line planning power failure section=the line transfer rate is x (overhead line segmentation number-1)/(2 x overhead line segmentation number);
if the line wiring mode is a cable line, the downstream user duty ratio of the line planning power failure section is =the line transfer rate is x (the number of cable line segments+1)/(2 x the number of cable line segments);
line planning blackout section user duty cycle = 1-line planning blackout section upstream user duty cycle-line planning blackout section downstream user duty cycle.
According to the principle that the power cut time at different positions is different, the power cut time of the line plan can be divided into the upstream power cut time of the power cut section of the line plan, the downstream power cut time of the power cut section of the line plan and the power cut time of the power cut section of the line plan. Three types of power failure time are calculated respectively: upstream outage time of line planning outage section = fault location time + fault isolation time; line planning outage section downstream outage time = fault location time + fault isolation time + distribution system transfer time; line planned outage section outage time = fault location time + fault isolation time + planned overhaul repair time. Calculating the planned average power failure time of the line according to the weighted average principle: line planned average outage time = line planned outage rate x (line planned outage section upstream user occupancy x line planned outage section upstream outage time + line planned outage section downstream user occupancy x line planned outage section downstream outage time + line planned outage section user occupancy x line planned outage section outage time).
S23, calculating the upstream user ratio, the downstream user ratio, the line fault section upstream power failure time, the downstream power failure time and the line fault section power failure time of the line fault section, and calculating the line fault average power failure time according to the user ratio and the power failure time.
The average power failure time of the line fault is the basis for calculating the average power failure time of the power distribution system with reliability indexes, and comprises the contents of three parts including user occupation ratios of different fault sections, power failure time of different fault sections, average power failure time of the line fault and the like. The calculation is performed according to the following formula:
according to the different influences of line faults on the power failure of users at different positions in the line, line installation users can be divided into an upstream line fault section, a downstream line fault section and a line fault section. And respectively calculating the average duty ratio of the three types of regional users: line fault section upstream user duty = (line segment number-1)/(2 x line segment number); according to different line wiring modes of the overhead line and the cable line, the downstream user duty ratio of the fault section has two types of calculation modes: if the line connection mode is an overhead line, the downstream user ratio of the line fault section=the line transfer rate× (the number of overhead line segments-1)/(2×the number of overhead line segments), and if the line connection mode is a cable line, the downstream user ratio of the line fault section=the line transfer rate× (the number of cable line segments +1)/(2×the number of cable line segments); line fault section user duty cycle = 1-line fault section upstream user duty cycle-line fault section downstream user duty cycle.
According to the principle that the power failure time at different positions is different, the line failure time can be divided into upstream power failure time of a line failure section, downstream power failure time of the line failure section and power failure time of the line failure section. Three types of power failure time are calculated respectively: line fault section upstream outage time = fault localization time + fault isolation time; line fault section downstream outage time = fault location time + fault isolation time + distribution system transfer time; line fault section outage time = fault localization time + fault isolation time + scheduled maintenance repair time.
Calculating average power failure time of line faults according to a weighted average principle:
line fault average outage time = line fault rate x (line fault section upstream user occupancy x line fault section upstream outage time + line fault section downstream user occupancy x line fault section downstream outage time + line fault section user occupancy x line fault section outage time).
S24, calculating the average power failure time of the power distribution system according to the planned average power failure time of the line and the average power failure time of the line fault.
First, the average power failure time of each loop line is calculated respectively. Calculated according to the following formula:
line average outage time = line planned average outage time + line fault average outage time
According to the principle that the power distribution system consists of a line system and a user system together, calculating the average power failure time of the power distribution system:
by the above formula, the initial average power failure time of the power distribution system before lifting measures are not adopted can be calculated.
And S3, calculating the average power failure time variation of the power distribution system corresponding to each lifting measure.
Specifically, the distribution automation retrofit will change the fault location time and fault isolation time in the reliability parameters, the fault location time variance = the fault location time before the distribution automation retrofit-the fault location time after the distribution automation retrofit; fault isolation time variance = fault isolation time before distribution automation retrofit-fault isolation time after distribution automation retrofit. The fault locating time in the step S2 is replaced by the fault locating time variable quantity, the fault isolation time in the step S2 is replaced by the fault isolation time variable quantity, and the average power failure time variable quantity of the power distribution system after the power distribution automation transformation is adopted can be calculated according to the mode of the step S2.
Specifically, the self-healing control technique promotes switching operation time of the power distribution system in the reliability parameter to be changed; the change quantity of the power distribution system transfer operation time = the power distribution system transfer operation time before the self-healing control technology is lifted-the power distribution system transfer operation time after the self-healing control technology is lifted; and replacing the power distribution system transfer operation time in the step S2 with the power distribution system transfer operation time variable quantity caused by the lifting of the self-healing control technology, and calculating the average power failure time variable quantity of the power distribution system after the power distribution system adopts the lifting measures of the self-healing control technology.
Specifically, the situational awareness technology boost will change the line plan outage rate in the reliability parameters; line plan outage rate variable quantity = line plan outage rate before situation awareness technology is lifted-line plan outage rate after situation awareness technology is lifted, line plan outage rate variable quantity caused by situation awareness technology is used for replacing line plan outage rate in step S2 and is calculated according to a calculation mode in step S2, and average outage time variable quantity of the power distribution system after the power distribution system adopts situation awareness technology lifting measures is obtained.
Specifically, the comprehensive power outage management measure lifting will change the line planned power outage rate and the planned overhaul repair time in the reliability parameters; the power distribution system average power failure time variation after the comprehensive power failure management measure lifting measures is calculated by replacing the line planning power failure rate in the step S2 with the line planning power failure rate variation after the comprehensive power failure management measure lifting, and replacing the planned maintenance repair time with the planned maintenance repair time variation after the comprehensive power failure management measure lifting.
Specifically, the device update will change the line failure rate in the reliability parameters; line failure rate change = line failure rate before device update-line failure rate after device update. And replacing the line fault rate by the line fault rate change quantity caused by the equipment updating and updating, and calculating the average power failure time of the power distribution system updated and updated by the equipment according to the calculation mode in the step S2.
And S4, determining the reliability improvement scheme of the power distribution system according to the priority of the lifting measure, the target power failure time of the power distribution system, the initial average power failure time of the power distribution system and the average power failure time variation of the power distribution system.
According to the order of the priority of the lifting measures from high to low, firstly checking and developing the lifting of the comprehensive power outage management measures to meet the requirement of the power distribution system on the target average power outage time. Specifically, the average power failure time of the power distribution system is judged to be more than or equal to the initial average power failure time of the power distribution system, the corresponding average power failure time variation of the power distribution system is promoted by the comprehensive power failure management measures, if the average power failure time is met, the reliability promotion measures are only to implement the comprehensive power failure management measures, and if the average power failure time is not met, the relation of the priority of the promotion measures is judged, and on the basis, whether the requirement of carrying out distribution automation improvement promotion can meet the average power failure time target value of the power distribution system is further verified: specifically, judging whether the target average power failure time of the power distribution system is more than or equal to the initial average power failure time of the power distribution system, the average power failure time variation of the power distribution system corresponding to the improvement of the comprehensive power failure management measures, and if so, obtaining the reliability improvement measures to implement the improvement of the comprehensive power failure management measures and the automatic power distribution improvement; if not, on the basis, verifying whether the lifting of the self-healing control technology can meet the requirement of the average power failure time target value of the power distribution system according to the priority of the lifting measures, specifically, judging whether the average power failure time of the power distribution system is equal to or more than the initial average power failure time of the power distribution system, the average power failure time variation of the power distribution system, which corresponds to the lifting of the comprehensive power failure management measure, the average power failure time variation of the power distribution system, which corresponds to the lifting of the self-healing control technology, and if so, obtaining the reliability lifting measure to implement the lifting of the comprehensive power failure management measure, the lifting of the power distribution automation measure and the lifting of the self-healing control technology; otherwise, on the basis of the lifting measures, checking whether the lifting of the situation awareness technology can meet the requirement of the average power failure time target value of the power distribution system, specifically, judging whether the average power failure time of the power distribution system is equal to or more than the initial average power failure time of the power distribution system, the average power failure time variation of the power distribution system, which corresponds to the lifting of the comprehensive power failure management measure, the average power failure time variation of the power distribution system, which corresponds to the lifting of the self-healing control technology, the average power failure time variation of the power distribution system, which corresponds to the lifting of the situation awareness technology, are met, and if so, obtaining the reliability lifting measure to implement the lifting of the comprehensive power failure management measure, the lifting of the power distribution automation measure, the lifting of the self-healing control technology and the lifting of the situation awareness technology; otherwise, the reliability improving measures are to implement comprehensive power failure management measure improvement, distribution automation transformation, self-healing control technology improvement, situation awareness technology improvement and equipment updating.
It should be noted that the order of steps S1, S2, S3 may be changed in the embodiment of the present invention.
According to the method for analyzing the power distribution system reliability lifting scheme, the lifting measures, the priorities of the lifting measures and the average power failure time variation of the power distribution system corresponding to each lifting measure are obtained, and whether the corresponding measures and the combination thereof meet the power distribution system target power failure time or not is checked in sequence according to the priorities of the lifting measures, so that the corresponding lifting scheme is obtained. The method combines the reliability lifting measures, the reliability parameters and the reliability index 3-layer variables of the power distribution system, and can quantify the influence factors among the 3-layer variables, so that the change sensitivity of the reliability parameters is calculated under the given reliability index target, and finally, an implementation scheme combination strategy of the reliability lifting measures is provided.
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (6)
1. A method of analyzing a power distribution system reliability improvement scheme, comprising the steps of:
acquiring lifting measures for improving the reliability of a power distribution system, the priority of the lifting measures and the target average power failure time of the power distribution system; the lifting measures comprise comprehensive power failure management measure lifting, distribution automation transformation, self-healing control technology lifting, situation awareness technology lifting and equipment updating;
acquiring basic parameters of a power distribution system and a line wiring mode of the power distribution system, and calculating initial average power failure time of the power distribution system before the lifting measures are not used;
calculating the average power failure time variation of the power distribution system corresponding to each lifting measure;
determining a reliability lifting scheme of the power distribution system according to the priority of the lifting measure, the target power failure time of the power distribution system, the initial average power failure time of the power distribution system and the average power failure time variation of the power distribution system;
the method for obtaining the basic parameters of the power distribution system and the line wiring modes of the power distribution system and calculating the initial average power failure time of the power distribution system before the lifting measures are not used specifically comprises the following steps:
acquiring a feeder line rotatable supply capacity, a feeder line total capacity and a distribution system line wiring mode, calculating a distribution system line rotatable supply rate according to the feeder line rotatable supply capacity and the feeder line total capacity, and calculating a distribution system line segmentation number according to the distribution system line wiring mode;
calculating an upstream user ratio, a downstream user ratio, a planned power-off section user ratio, a line calculation power-off section upstream power-off time, a downstream power-off time and a planned power-off section power-off time of a line according to the line segmentation number and the line wiring mode, and calculating a line calculation average power-off time according to the line calculation power-off section upstream user ratio, the downstream user ratio, the planned power-off section user ratio, the line calculation power-off section upstream power-off time, the downstream power-off time and the planned power-off section power-off time;
calculating an upstream user ratio, a downstream user ratio, a line fault section user ratio, line fault section upstream power-off time, downstream power-off time and line fault section power-off time of a line fault section, and calculating line fault average power-off time according to the line fault section upstream user ratio, the downstream user ratio, the line fault section upstream power-off time, the downstream power-off time and the line fault section power-off time;
calculating initial average power failure time of the power distribution system according to the planned average power failure time of the line and the average power failure time of the line fault;
the calculating the average power failure time change of the power distribution system corresponding to each lifting measure specifically comprises the following steps:
acquiring corresponding parameters of each lifting measure affecting the reliability of the power distribution system and the variation of the corresponding parameters;
calculating the average power failure time variation of the power distribution system corresponding to each lifting measure according to the variation of the parameters corresponding to each lifting measure;
the power distribution system reliability improvement scheme is determined according to the priority of the improvement measures, the target power failure time of the power distribution system, the initial average power failure time of the power distribution system and the average power failure time variation of the power distribution system, and specifically comprises the following steps:
according to the order of the priority of the lifting measures, firstly checking whether the lifting of the comprehensive power outage management measures can meet the requirement of the target average power outage time of the power distribution system, judging whether the target average power outage time of the power distribution system is larger than or equal to the initial average power outage time of the power distribution system-the average power outage management measures of the corresponding power distribution system, if yes, obtaining the reliability lifting measures only for implementing the lifting of the comprehensive power outage management measures, if not, further checking whether the lifting of the power distribution automation improvement can meet the requirement of the target value of the average power outage time of the power distribution system, judging whether the target average power outage time of the power distribution system is larger than or equal to the initial average power outage time of the power distribution system-the average power outage time of the power distribution system corresponding to the lifting of the comprehensive power outage management measures-the average power outage time of the power distribution system-the average power outage time change of the power distribution system corresponding to the automatic improvement is established, if established, obtaining the reliability lifting measures for implementing the lifting of the comprehensive power outage management measures of the power outage management measures is carried out as lifting of the average power outage management measures of the power distribution system and the power distribution automation improvement is carried out if not established, and if not established, judging whether the self-healing control measures of the self-recovery control technology lifting of the power outage time of the power distribution system target average power outage time of the power distribution system can be carried out is improved, otherwise, further checking whether the improvement of the situation awareness technology can meet the requirement of the average power failure time target value of the power distribution system, judging whether the average power failure time of the power distribution system is equal to or more than the initial average power failure time of the power distribution system, corresponding to the improvement of the average power failure time variation of the power distribution system, corresponding to the improvement of the integrated power failure management measure, corresponding to the automatic improvement of the power distribution system, and corresponding to the improvement of the average power failure time variation of the power distribution system, corresponding to the self-healing control measure, and whether the average power failure time variation of the power distribution system, corresponding to the improvement of the situation awareness technology, is met, if so, obtaining the reliability improvement measure to implement the improvement of the integrated power failure management measure, the improvement of the power distribution automation, the improvement of the self-healing control measure, the improvement of the situation awareness technology and the updating of equipment.
2. The method according to claim 1, wherein the calculating the line transfer rate of the power distribution system according to the feeder line transfer capacity and the total feeder line capacity is specifically:
line transfer rate = feeder availability capacity divided by feeder total capacity;
the method for calculating the number of the line segments of the power distribution system according to the line wiring mode comprises the following steps:
if the distribution system line wiring mode is an overhead line, the line sectionalizing number=sectionalizing switch number plus one;
if the distribution system circuit architecture is a cable circuit, the circuit segmentation number=the ring main unit number plus one.
3. The method according to claim 2, characterized in that:
upstream user duty ratio of the line planning outage section= (line segmentation number-1)/(2)Line segment number);
if the mode of the planned outage line connection mode is an overhead line, the downstream user duty ratio of the planned outage section of the line=line transfer rate(overhead line segment number-1)/(2>Overhead line segment number), if the line connection mode is a cable line, the line is planned to stopDownstream user duty ratio of electric section = line transfer rate +.>(number of cable segments-1)/(2>Number of cable line segments);
the user duty ratio of the line planning power outage section=1-the upstream user duty ratio of the line planning power outage section-the downstream user duty ratio of the line planning power outage section;
upstream power outage time of the line planning power outage section=fault location time+fault interval time;
the downstream power failure time of the line planning power failure section=fault positioning time+fault isolation time+power distribution system transfer time;
the power failure time of the line planned power failure section=fault positioning time+fault isolation time+planned maintenance repair time;
the line planned average outage time=line planned outage rate(upstream user ratio of line planned blackout section +.>Upstream power outage time of line planning power outage section + downstream user duty ratio of line planning power outage section ∈>Downstream power outage time of line planning power outage section + user ratio of line planning power outage section +.>Line planning outage section outage time).
4. The method according to claim 1, wherein the calculating the upstream user duty cycle, the downstream user duty cycle, the line fault section user duty cycle, and the line fault section upstream power outage time, the downstream power outage time, and the line fault section power outage time, and calculating the line fault average power outage time based on the user duty cycle and the power outage time is specifically:
line fault section upstream user duty = (line segment number-1)/(2 x line segment number);
if the wiring mode of the line fault section is an overhead line, the downstream user duty ratio of the line fault section=line transfer rate(overhead line segment number-1)/(2>Overhead line segment number), if the connection mode of the line fault section is a cable line, the downstream user of the line fault section is a line with a ratio of (line transfer rate)/(line transfer rate>(number of cable segments-1)/(2>Number of cable line segments);
the line fault section user duty cycle = 1-line fault section upstream user duty cycle-line fault section downstream user duty cycle;
upstream power failure time of the line fault section=fault location time+fault isolation time;
line fault section downstream outage time = fault location time + fault isolation time + distribution system transfer time;
line fault section power failure time = fault location time + fault isolation time + scheduled maintenance repair time;
line fault average outage time = line fault rate x (line fault section upstream user occupancy x line fault section upstream outage time + line fault section downstream user occupancy x line fault section downstream outage time + line fault section user occupancy x line fault section outage time).
5. The method according to claim 4, wherein: the calculating the average power failure time of the power distribution system according to the planned average power failure time of the line and the average power failure time of the line fault specifically comprises the following steps:
calculating the average power failure time of each loop according to the line planning average power failure time and the line fault average power failure time;
and calculating the average power failure time of the power distribution system according to the average power failure time of each loop line.
6. The method according to claim 1, wherein the determining whether the verification condition is satisfied is specifically:
calculating the sum of average power failure time variation amounts of the power distribution system corresponding to the lifting measures participating in verification;
and judging whether the difference value between the initial average power failure time of the power distribution system and the sum is smaller than or equal to the target average power failure time of the power distribution system.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437573A (en) * | 2011-12-29 | 2012-05-02 | 广东电网公司深圳供电局 | Evaluation and control method and system for reliability of electric distribution network based on fuzzy modeling |
| CN103106624A (en) * | 2013-02-27 | 2013-05-15 | 广东电网公司东莞供电局 | Method of building reliable improved effect relation between investment on power grid and power supply |
| SE1350462A1 (en) * | 2012-06-13 | 2013-12-14 | Abb Research Ltd | Analysis of interruption propagation for electrical distribution systems |
| CN107147111A (en) * | 2017-05-19 | 2017-09-08 | 上海电力设计院有限公司 | The distribution power automation terminal points distributing method analyzed based on power supply reliability |
| CN107994572A (en) * | 2017-12-07 | 2018-05-04 | 天津大学 | A kind of distribution network reliability measure for improvement applicability quantitative analysis method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105069535B (en) * | 2015-08-19 | 2020-07-24 | 中国电力科学研究院 | Power distribution network operation reliability prediction method based on ARIMA model |
-
2019
- 2019-10-09 CN CN201910951805.7A patent/CN110766295B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437573A (en) * | 2011-12-29 | 2012-05-02 | 广东电网公司深圳供电局 | Evaluation and control method and system for reliability of electric distribution network based on fuzzy modeling |
| SE1350462A1 (en) * | 2012-06-13 | 2013-12-14 | Abb Research Ltd | Analysis of interruption propagation for electrical distribution systems |
| CN103106624A (en) * | 2013-02-27 | 2013-05-15 | 广东电网公司东莞供电局 | Method of building reliable improved effect relation between investment on power grid and power supply |
| CN107147111A (en) * | 2017-05-19 | 2017-09-08 | 上海电力设计院有限公司 | The distribution power automation terminal points distributing method analyzed based on power supply reliability |
| CN107994572A (en) * | 2017-12-07 | 2018-05-04 | 天津大学 | A kind of distribution network reliability measure for improvement applicability quantitative analysis method |
Non-Patent Citations (1)
| Title |
|---|
| 配电网供电可靠性薄弱环节分析与改进;万凌云;张盈;刘真;岳鑫桂;徐江涛;;山东电力技术(06);第39-42页 * |
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