CN115994715A - Power distribution network reliability analysis and evaluation method, system and device - Google Patents
Power distribution network reliability analysis and evaluation method, system and device Download PDFInfo
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- CN115994715A CN115994715A CN202310285345.5A CN202310285345A CN115994715A CN 115994715 A CN115994715 A CN 115994715A CN 202310285345 A CN202310285345 A CN 202310285345A CN 115994715 A CN115994715 A CN 115994715A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a method, a system and a device for analyzing and evaluating the reliability of a power distribution network, wherein the method comprises the following steps of S1, determining analysis indexes of the power supply reliability of the power distribution network; s2, analyzing and evaluating the power supply reliability of the distributed power supply to the power distribution network; s3, analyzing and evaluating the power supply reliability of the power distribution network by demand response; and S4, establishing a proportional failure overhaul model taking the reliability as a center, and evaluating the power distribution equipment according to the proportional failure overhaul model. The invention can realize the analysis and evaluation of the reliability of the distribution network.
Description
Technical Field
The invention relates to the field of power distribution networks, in particular to a method, a system and a device for analyzing and evaluating reliability of a power distribution network.
Background
The distribution network in the power system is positioned at the tail end and is directly connected with the user, so that the whole power system including power generation, transmission and distribution is an important link for connecting the user with the power system and supplying and distributing electric energy to the user;
according to incomplete statistics, more than 80% of faults occur on a distribution network side in faults which cause power failure of users, so that the faults occurring on the distribution network have great influence on the reliability of power supply of the users;
because of the separation of factories and networks of the power system in China, the center of gravity of the operation and management of the power company is gradually shifted from the power production management to the management centered on the user, so as to meet the power requirements of the user on high quality and high reliability.
Meanwhile, the maintenance strategy of the power distribution equipment has great influence on the power supply reliability of the power distribution network. Common power distribution network maintenance modes include post-fault maintenance and preventive maintenance, and most of the existing reliability assessment methods are only aimed at post-fault maintenance.
Disclosure of Invention
The invention aims to provide a method, a system and a device for analyzing and evaluating the reliability of a power distribution network, and aims to solve the problem of analyzing and evaluating the reliability of the power distribution network.
The invention provides a method for analyzing and evaluating the reliability of a power distribution network, which comprises the following steps:
s1, determining a power supply reliability analysis index of a power distribution network;
s2, analyzing and evaluating the power supply reliability of the distributed power supply to the power distribution network;
s3, analyzing and evaluating the power supply reliability of the power distribution network by demand response;
and S4, establishing a proportional failure overhaul model taking the reliability as a center, and evaluating the power distribution equipment according to the proportional failure overhaul model.
The invention also provides a system for analyzing and evaluating the reliability of the power distribution network, which comprises the following steps:
the index module is used for: determining a power supply reliability analysis index of the power distribution network;
a first evaluation module: analyzing and evaluating the power supply reliability of the distributed power supply to the power distribution network;
a second evaluation module: analyzing and evaluating the power supply reliability of the power distribution network by demand response;
a third evaluation module: and establishing a proportional failure overhaul model taking the reliability as a center, and evaluating the power distribution equipment according to the proportional failure overhaul model.
The embodiment of the invention also provides a device for analyzing and evaluating the reliability of the power distribution network, which comprises the following steps: a memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor, performs the steps of the method described above.
The embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium stores an information transmission implementation program, and the program realizes the steps of the method when being executed by a processor.
By adopting the embodiment of the invention, the reliability analysis and evaluation of the power distribution network can be realized.
The foregoing description is only an overview of the present invention, and is intended to provide a more clear understanding of the technical means of the present invention, as it is embodied in accordance with the present invention, and to make the above and other objects, features and advantages of the present invention more apparent, as it is embodied in the following detailed description of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for analyzing and evaluating reliability of a power distribution network according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for analyzing and evaluating reliability of a power distribution network according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a preventive maintenance strategy for a power distribution network according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a method for calculating the reliability of preventive maintenance power supply of a power distribution network according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a comparison of a preventive maintenance strategy and a fault maintenance strategy of a power distribution network according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a power distribution network reliability analysis and assessment system according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a power distribution network reliability analysis and evaluation apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Method embodiment
According to an embodiment of the present invention, a method for analyzing and evaluating reliability of a power distribution network is provided, and fig. 1 is a flowchart of the method for analyzing and evaluating reliability of a power distribution network according to the embodiment of the present invention, as shown in fig. 1, specifically including:
s1, determining a power supply reliability analysis index of a power distribution network;
s2, analyzing and evaluating the power supply reliability of the distributed power supply to the power distribution network;
s2 specifically comprises:
s21, classifying the distributed power supply model, analyzing load historical data, classifying the load and establishing a load probability model;
s22, establishing a micro-grid model according to the operation characteristics of the micro-grid, obtaining a reliability evaluation algorithm according to the structural characteristics of the micro-grid, evaluating the reliability of a distribution network system comprising micro-grid access according to the algorithm, and determining the optimal access strategy of the micro-grid according to the reliability;
s23, obtaining the influence of the distributed power supply access distribution network on various load equipment conditions.
S3, analyzing and evaluating the power supply reliability of the power distribution network by demand response;
s3 specifically comprises:
s31, obtaining influence of current-stage time-of-use electricity price implementation on power supply reliability of the power distribution network; acquiring the time division of the time-sharing electricity price, the price elastic coefficient and the influence of the time-sharing electricity price on the load based on a demand response mechanism of the time-sharing electricity price;
s32, acquiring influence of implementation of demand response and demand scheduling on the reliability of the power distribution network, acquiring price-based demand response and incentive-based demand response in the demand response, and analyzing influence of the demand response on the power supply reliability of the power distribution network according to an evaluation result; and establishing a power distribution network power supply reliability evaluation model based on demand scheduling to evaluate the reliability.
And S4, establishing a proportional failure overhaul model taking the reliability as a center, and evaluating the power distribution equipment according to the proportional failure overhaul model.
S4 specifically comprises the following steps:
describing a preventive maintenance strategy of the power distribution network through a reliability function, acquiring the influence of preventive maintenance on the equipment failure rate, setting a preventive maintenance reliability threshold value, and comparing the reliability of the element at the corresponding moment with the threshold value to obtain the element meeting the preventive maintenance condition; the method comprises the steps of obtaining the difference of two maintenance modes of maintenance after faults and preventive maintenance and the different influences of the maintenance modes on the reliability of the power distribution network, adopting two different methods to simulate the system faults and the service life changes of each element respectively during the reliability calculation, and making corresponding maintenance decisions.
The specific implementation method is as follows:
FIG. 2 is a flowchart of a method for analyzing and evaluating reliability of a power distribution network according to an embodiment of the present invention;
1. power distribution network power supply reliability analysis and evaluation method research by distributed power supply (DG)
The distributed power supply (DG) is used for analyzing the power supply reliability of the power distribution network, the influence of the access of the distributed power supply (DG) on the structure and the operation mode of the power distribution network, the load acquisition electric energy source and the network reconstruction of the micro-grid operation after the fault are fully considered, the task is realized by researching a probability model of the DG and the load and a power distribution network reliability evaluation method suitable for the access of the micro-grid, and the power distribution network reliability evaluation method considering the access of the DG is proposed according to the model and the method, and the main research method is as follows:
(1) the probability model of DG and load was studied. Aiming at different types of DG primary energy sources, classifying and dividing the distributed power supply model, and comprehensively considering the distributed power supply model based on various aspects such as load demand, rated capacity, equipment availability, factors affecting output and the like in the working process; by analyzing the historical data of the load, the load is classified by utilizing a statistical principle, and a load probability model is designed.
(2) The method for evaluating the distribution network reliability is suitable for micro-network access. Firstly, a micro-grid model is established according to the operation characteristics of the micro-grid, and the model comprehensively considers the characteristics of DG power generation, the charging and discharging mechanisms of an energy storage device and a distributed power supply and the characteristics of the energy storage device; secondly, providing a set of reliability evaluation algorithm according to the structural characteristics of the network; and finally, evaluating the reliability of the distribution network system containing the access of the micro-network by using the method. The micro-grid is connected to the distribution network in different positions and power capacity configurations, and the power supply reliability of the system shows a certain difference. By performing reliability analysis on the system, the optimal access policy of the micro-network can be determined.
(3) The distribution network reliability evaluation method of DG access is considered. The influence of DG access on the power failure conditions of various load points is required to be discussed in a classified mode, and factors such as fault reconstruction, switch type, DG type, access position, island adequacy probability and the like are comprehensively considered in fault influence analysis.
The distribution network reliability index can be divided into two aspects, namely a system side reliability index and a load point reliability index. The load point reliability index is mainly used for measuring the power supply reliability level of a single individual in the power system and mainly comprises the following steps: average outage duration, annual average outage time, and average failure rate. The system side reliability index is used for measuring the comprehensive level of the power supply reliability of all individuals in the whole system, and mainly comprises the following steps: the system average power failure frequency index, the user average power failure time index, the system average power failure duration index, the user average power failure duration index, the average power supply availability index, the system total electric quantity deficiency index and the system average electric quantity deficiency index.
2. Method for analyzing and evaluating power supply reliability of power distribution network by demand response
Based on time division of time-of-use electricity price, price elasticity coefficient and influence analysis of time-of-use electricity price on load, the influence of current time-of-use electricity price implementation on power distribution network power supply reliability is analyzed; on the basis, the influence of the implementation of 'demand response' and 'demand scheduling' on the reliability of the power distribution network is studied. The main research method is as follows:
(1) and analyzing the influence of the current-stage time-sharing electricity price implementation on the power supply reliability of the power distribution network. Based on a demand response mechanism of the time-sharing electricity price, the time division of the time-sharing electricity price, the price elasticity coefficient and the influence of the time-sharing electricity price on the load are comprehensively considered.
(2) The influence of the implementation of 'demand response' and 'demand scheduling' on the reliability of the power distribution network is studied. And comprehensively considering the price-based demand response and the incentive-based demand response in the demand response, and analyzing the influence of the demand response on the power supply reliability of the power distribution network according to the evaluation result. And establishing a power distribution network power supply reliability evaluation model based on demand scheduling.
Specific reliability indexes can be classified into frequency indexes, probability indexes and electric power and electric quantity indexes. The frequency index mainly comprises a system average power failure frequency index; the probability indexes mainly comprise average power failure duration time of a system, average power failure duration time of a user, average power supply availability index and the like; the power and electricity quantity indexes mainly comprise system power shortage and supply quantity indexes and the like.
3. Study of influence of optimized overhaul of power distribution equipment on power supply reliability of power distribution network
FIG. 3 is a schematic diagram of a preventive maintenance strategy for a power distribution network according to an embodiment of the present invention;
the distribution system mainly comprises equipment such as a distribution transformer, switching equipment (circuit breakers, sectionalizers, load switches, fuses and the like) and feeder lines (overhead lines and cables).
The Weibull distribution at parameter βi >1 is used to describe the effect of aging on device failure rate and reliability.
And giving a preventive maintenance strategy of the equipment according to the reliability function.
The influence of preventive maintenance on the equipment and the power supply reliability of the distribution network is deeply analyzed, and the quantitative relation between the equipment and the distribution network is given.
Aiming at common post-fault maintenance and preventive maintenance in a power distribution network, a reliability function is designed to describe a preventive maintenance strategy of the power distribution network, the influence of the preventive maintenance on the equipment fault rate and the protective measures for improving the reliable operation of the power distribution network equipment are researched, and finally, a theoretical analysis method for improving the power supply reliability of the power distribution network by implementing the power distribution network state maintenance is researched on the basis, wherein the main research method is as follows:
FIG. 4 is a schematic diagram of a method for calculating the reliability of preventive maintenance power supply of a power distribution network according to an embodiment of the present invention;
in consideration of the difference between two maintenance modes of preventive maintenance and fault maintenance and the different influences of the two maintenance modes on the reliability of the power distribution network, two different methods are adopted to simulate the system faults and the service life changes of each element respectively during the reliability calculation, and corresponding maintenance decisions are made.
System reliability index: system average outage frequency index SAIFI, system average outage duration index SAIDI, user average outage duration index CAIDI, etc.
As the reliability of the equipment increases, the number of failures of the equipment gradually decreases, but the number of preventive maintenance is required to increase, and the decrease in the failure rate of the equipment is replaced with the increase in the number of preventive maintenance.
By analysis, it can also be seen that: by adopting a preventive maintenance strategy, although manpower and material resources are increased, the maintenance cost is reduced by comprehensively considering the maintenance cost, which is mainly caused by reducing the number of times of fault maintenance, equipment fault maintenance cost caused by the fault maintenance and output loss caused by equipment shutdown.
FIG. 5 is a schematic diagram of a comparison of a preventive maintenance strategy and a fault maintenance strategy of a power distribution network according to an embodiment of the present invention;
in FIG. 5 (a), the average outage index (SAIFI) of the system under the preventive maintenance strategy becomes large and the trend of change is the same as that of the total maintenance. As the reliability Rp increases, the SAIFI increases slowly, and after Rp >0.6, the SA1FI index increases faster; the number of subsequent blackouts is mainly a preventive maintenance blackout.
Fig. 5 (b) system average outage duration (SAIDI) at 0< rp <0.3 is slightly higher than its level under post-fault maintenance strategy: and when Rp is more than 0.3, SAIDI index is obviously reduced until Rp is more than 0.8 and then gradually increased; but overall >03, the SAIDI index was lower than its level under the post-failure androstage strategy.
FIG. 5 (c) shows that as the reliability Rp increases, the user average outage duration index (CAIDI) gradually decreases and substantially approximates a linear decrease
The box line is a preventive maintenance strategy and the dotted line is a post-fault maintenance strategy.
And (5) researching protective measures for improving reliable operation of power distribution network equipment. And describing a preventive maintenance strategy of the power distribution network through a reliability function, researching the influence of preventive maintenance on the equipment failure rate, setting a preventive maintenance reliability threshold value, finding out elements reaching preventive maintenance conditions by comparing the reliability of the elements at corresponding moments with the threshold value, and giving corresponding protective measures.
And researching and implementing a theoretical analysis method for improving the power supply reliability of the power distribution network by the power distribution network state overhaul. Considering the difference of two maintenance modes of maintenance after failure and preventive maintenance and the different influences of the maintenance modes on the reliability of the power distribution network, two different methods are required to be adopted to simulate the system failure and the service life change of each element respectively during the reliability calculation, and corresponding maintenance decisions are made.
The study of the power supply reliability of the power distribution network comprises the following stages:
first, an analysis index of the power supply reliability of the power distribution network is determined. The reliability analysis index of the current power distribution network is analyzed and perfected, and the user-based reliability index for indicating the power outage frequency and the power outage duration of a single user and the load-based reliability index for indicating the duration and the frequency of the power outage load are comprehensively considered. After the distributed power supply is connected into the power distribution network, the effectiveness of the power supply reliability index of the power distribution network is analyzed and perfected.
Next, a method for analyzing and evaluating the reliability of power supply of a distributed power supply (DG) to a power distribution network is studied. A novel distribution network reliability analysis and evaluation model and method considering the influence of the distributed power supply are researched and used for analyzing the influence on the reliability of the distribution network after the distributed power supply is connected into the distribution network. Analysis models and methods for the reliability of power supply of a distributed power supply with volatility and randomness to a power distribution network are studied in an important way.
And secondly, researching a method for analyzing and evaluating the power supply reliability of the power distribution network by the demand response. And analyzing the influence of the current-stage time-sharing electricity price implementation on the power supply reliability of the intelligent power distribution network. The analysis and evaluation model and the effect evaluation method for the power supply reliability of the power distribution network are mainly researched by the implementation of 'demand response' and 'demand scheduling'.
And finally, researching a theoretical analysis method for improving the power supply reliability of the power distribution network by implementing the power distribution network state overhaul. Firstly, protective measures for improving reliable operation of power distribution network equipment are analyzed, and then a proportional failure overhaul model taking reliability as a center and an evaluation method of the power distribution equipment are established through key research.
System embodiment one
According to an embodiment of the present invention, a system for analyzing and evaluating reliability of a power distribution network is provided, and fig. 6 is a schematic diagram of the system for analyzing and evaluating reliability of a power distribution network according to an embodiment of the present invention, as shown in fig. 6, specifically including:
the index module is used for: determining a power supply reliability analysis index of the power distribution network;
a first evaluation module: analyzing and evaluating the power supply reliability of the distributed power supply to the power distribution network;
a second evaluation module: analyzing and evaluating the power supply reliability of the power distribution network by demand response;
a third evaluation module: and establishing a proportional failure overhaul model taking the reliability as a center, and evaluating the power distribution equipment according to the proportional failure overhaul model.
The first evaluation module is specifically configured to:
classifying the distributed power supply model, analyzing load historical data, classifying the load and establishing a load probability model;
establishing a micro-grid model according to the operation characteristics of the micro-grid, obtaining a reliability evaluation algorithm according to the structural characteristics of the micro-grid, evaluating the reliability of a distribution network system containing micro-grid access according to the algorithm, and determining the optimal access strategy of the micro-grid according to the reliability;
and obtaining the influence of the distributed power supply access distribution network on the power failure condition of various load devices.
The second evaluation module is specifically configured to:
acquiring the influence of the current-stage time-sharing electricity price implementation on the power supply reliability of the power distribution network; acquiring the time division of the time-sharing electricity price, the price elastic coefficient and the influence of the time-sharing electricity price on the load based on a demand response mechanism of the time-sharing electricity price;
acquiring the influence of the implementation of the demand response and the demand scheduling on the reliability of the power distribution network, acquiring the price-based demand response and the incentive-based demand response in the demand response, and analyzing the influence of the demand response on the power supply reliability of the power distribution network according to the evaluation result; and establishing a power distribution network power supply reliability evaluation model based on demand scheduling to evaluate the reliability.
The third evaluation module is specifically configured to:
describing a preventive maintenance strategy of the power distribution network through a reliability function, acquiring the influence of preventive maintenance on the equipment failure rate, setting a preventive maintenance reliability threshold value, and comparing the reliability of the element at the corresponding moment with the threshold value to obtain the element meeting the preventive maintenance condition;
the method comprises the steps of obtaining the difference of two maintenance modes of maintenance after faults and preventive maintenance and the different influences of the maintenance modes on the reliability of the power distribution network, adopting two different methods to simulate the system faults and the service life changes of each element respectively during the reliability calculation, and making corresponding maintenance decisions.
The embodiment of the present invention is a system embodiment corresponding to the above method embodiment, and specific operations of each module may be understood by referring to the description of the method embodiment, which is not repeated herein.
An embodiment of the present invention provides a power distribution network reliability analysis and evaluation device, as shown in fig. 7, including: memory 70, processor 72, and a computer program stored on memory 70 and executable on processor 72, which when executed by the processor, performs the steps of the method embodiments described above.
Device example two
The embodiment of the present invention provides a computer-readable storage medium, on which an implementation program for information transmission is stored, which when executed by the processor 72 implements the steps of the method embodiment described above.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; and these modifications or substitutions may be made to the technical solutions of the embodiments of the present invention without departing from the spirit of the corresponding technical solutions.
Claims (10)
1. A method for analyzing and evaluating the reliability of a power distribution network is characterized by comprising the following steps of,
s1, determining a power supply reliability analysis index of a power distribution network;
s2, analyzing and evaluating the power supply reliability of the distributed power supply to the power distribution network;
s3, analyzing and evaluating the power supply reliability of the power distribution network by demand response;
and S4, establishing a proportional failure overhaul model taking the reliability as a center, and evaluating the power distribution equipment according to the proportional failure overhaul model.
2. The method according to claim 1, wherein S2 specifically comprises:
s21, classifying the distributed power supply model, analyzing load historical data, classifying the load and establishing a load probability model;
s22, establishing a micro-grid model according to the operation characteristics of the micro-grid, obtaining a reliability evaluation algorithm according to the structural characteristics of the micro-grid, evaluating the reliability of a distribution network system comprising micro-grid access according to the algorithm, and determining the optimal access strategy of the micro-grid according to the reliability;
s23, obtaining the influence of the distributed power supply access distribution network on various load equipment conditions.
3. The method according to claim 2, wherein S3 specifically comprises:
s31, obtaining influence of current-stage time-of-use electricity price implementation on power supply reliability of the power distribution network; acquiring the time division of the time-sharing electricity price, the price elastic coefficient and the influence of the time-sharing electricity price on the load based on a demand response mechanism of the time-sharing electricity price;
s32, acquiring influence of implementation of demand response and demand scheduling on the reliability of the power distribution network, acquiring price-based demand response and incentive-based demand response in the demand response, and analyzing influence of the demand response on the power supply reliability of the power distribution network according to an evaluation result; and establishing a power distribution network power supply reliability evaluation model based on demand scheduling to evaluate the reliability.
4. A method according to claim 3, wherein S4 comprises:
describing a preventive maintenance strategy of the power distribution network through a reliability function, acquiring the influence of preventive maintenance on the equipment failure rate, setting a preventive maintenance reliability threshold value, and comparing the reliability of the element at the corresponding moment with the threshold value to obtain the element meeting the preventive maintenance condition;
the method comprises the steps of obtaining the difference of two maintenance modes of maintenance after faults and preventive maintenance and the different influences of the maintenance modes on the reliability of the power distribution network, adopting two different methods to simulate the system faults and the service life changes of each element respectively during the reliability calculation, and making corresponding maintenance decisions.
5. A system for analyzing and evaluating the reliability of a power distribution network is characterized by comprising,
the index module is used for determining analysis indexes of the power supply reliability of the power distribution network;
the first evaluation module is used for analyzing and evaluating the power supply reliability of the distributed power supply to the power distribution network;
the second evaluation module is used for analyzing and evaluating the power supply reliability of the power distribution network by the demand response;
and the third evaluation module is used for establishing a proportional failure overhaul model taking the reliability as a center and evaluating the power distribution equipment according to the proportional failure overhaul model.
6. The system of claim 5, wherein the first evaluation module is specifically configured to:
classifying the distributed power supply model, analyzing load historical data, classifying the load and establishing a load probability model;
establishing a micro-grid model according to the operation characteristics of the micro-grid, obtaining a reliability evaluation algorithm according to the structural characteristics of the micro-grid, evaluating the reliability of a distribution network system containing micro-grid access according to the algorithm, and determining the optimal access strategy of the micro-grid according to the reliability;
and obtaining the influence of the distributed power supply access distribution network on the power failure condition of various load devices.
7. The system of claim 6, wherein the second evaluation module is specifically configured to:
acquiring the influence of the current-stage time-sharing electricity price implementation on the power supply reliability of the power distribution network; acquiring the time division of the time-sharing electricity price, the price elastic coefficient and the influence of the time-sharing electricity price on the load based on a demand response mechanism of the time-sharing electricity price;
acquiring the influence of the implementation of the demand response and the demand scheduling on the reliability of the power distribution network, acquiring the price-based demand response and the incentive-based demand response in the demand response, and analyzing the influence of the demand response on the power supply reliability of the power distribution network according to the evaluation result; and establishing a power distribution network power supply reliability evaluation model based on demand scheduling to evaluate the reliability.
8. The system of claim 7, wherein the third evaluation module is specifically configured to:
describing a preventive maintenance strategy of the power distribution network through a reliability function, acquiring the influence of preventive maintenance on the equipment failure rate, setting a preventive maintenance reliability threshold value, and comparing the reliability of the element at the corresponding moment with the threshold value to obtain the element meeting the preventive maintenance condition;
the method comprises the steps of obtaining the difference of two maintenance modes of maintenance after faults and preventive maintenance and the different influences of the maintenance modes on the reliability of the power distribution network, adopting two different methods to simulate the system faults and the service life changes of each element respectively during the reliability calculation, and making corresponding maintenance decisions.
9. A power distribution network reliability analysis and evaluation device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor, carries out the steps of the power distribution network reliability analysis and assessment method according to any one of claims 1 to 4.
10. A computer-readable storage medium, wherein a program for implementing information transfer is stored on the computer-readable storage medium, the program implementing the steps of the power distribution network reliability analysis and evaluation method according to any one of claims 1 to 4 when executed by a processor.
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| CN105427195A (en) * | 2015-12-23 | 2016-03-23 | 国家电网公司 | Calculation method of reliability index of power transmission and distribution integration |
| CN106505559A (en) * | 2016-11-25 | 2017-03-15 | 国家电网公司 | Distribution network reliability analysis method based on power supply zone |
| CN108805423A (en) * | 2018-05-25 | 2018-11-13 | 国网山东省电力公司聊城供电公司 | A kind of power distribution network methods of risk assessment based on distributed new access |
| CN110705908A (en) * | 2019-10-16 | 2020-01-17 | 海南电网有限责任公司 | County power distribution network evaluation method based on combined weighting method |
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