A Forward-Backward Alternative Method for Reliability Assessment of Complex Radial Distribution Network
A forward-backward generation and distribution network technology, applied in data processing applications, instruments, calculations, etc., can solve problems such as large amount of calculation, inability to apply reliability evaluation of complex radial distribution network, and inability to use
Active Publication Date: 2017-04-12
CHONGQING UNIV
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The main disadvantages of this method are as follows: ① Since the reliability index of each faulty component needs to be transmitted upstream to all nodes upstream of the reliability index, the amount of calculation when searching for upstream nodes is the same as that of nodes in each branch network. The number of downstream elements related to the
③Calculation of reliability indexes of upstream transfer and downstream return is only applicable to the branch network without backup power supply, but not to the main network with backup power supply
④ When evaluating the reliability of the distribution network of multiple backup power sources, it is necessary to combine the main power source and each backup power source to calculate the reliability index, which requires a large amount of calculation
Since this method adopts the algorithm of upstream transfer and downstream merging reliability indicators for each branch network is equivalent to the FMEA method, and the reliability calculation of the main network directly adopts the FMEA method, so in the case of a large number of computing components and multiple backup power supplies The calculation of the distribution network reliability index is large, and it cannot be applied to the reliability evaluation of the complex radial distribution network with multiple backup power sources
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0064] Such as figure 1 , 2 As shown, the specific steps of a forward-backward method for reliability assessment of complex radial distribution networks are as follows:
[0065] (1) Input distribution network data
[0066] Firstly, it is defined that any branch in the distribution network is composed of head-end switches and components (lines or transformers) in series. Then enter the data of the distribution network. The data of the distribution network includes the total number of nodes (N=103), the total number of branches (L=102), the number of branches (1, 2, ..., 102), the number of nodes at the beginning and end of the branch, and the switch type of the branch (not installation of switches, installation of isolating switches, installation of circuit breakers or fuses), line failure rate, line repair time, transformer failure rate, transformer repair time, node number of backup power access (N d1 =75,N d2 =95), the isolation fault time (R I =1h), backup power switc...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a forward-back substitution method for reliability assessment of complex radial power distribution networks, and belongs to the technical field of reliability assessment methods of power distribution networks. A computer is adopted, power distribution network data are input through programs at first, radial power distribution network branch arrays capable of being applied to forward-back substitution calculation are determined, then node reliability indexes are determined by utilizing the forward-back substitution method for calculating reliability indexes, and finally the reliability indexes of a system are calculated. The forward-back substitution method can be widely applied to accurate and rapid assessment of the reliability of large-scale complex power distribution networks with multiple standby power supplies and multiple branch lines, influences of disconnecting switches, branch line protectors, standby transformers, standby power supplies and other configured devices on the reliability of the power distribution networks can be calculated conveniently, the time for reliability assessment of the complex power distribution networks can be shortened effectively, and scientific bases are provided for plans and operation decisions of the power distribution networks. The forward-back substitution method can be widely applied to the reliability assessment of the radial power distribution networks.
Description
technical field [0001] The invention belongs to the technical field of distribution network reliability evaluation methods, and in particular relates to a forward push-back generation method for reliability evaluation of a complex radial distribution network. Background technique [0002] The distribution network is an important link connecting the power transmission and transformation system and user facilities, and undertakes the important task of distributing and supplying electric energy to users. The ability of the distribution network to provide reliable and continuous power supply directly affects the reliability of power supply for users. Statistics show that 80% of user power outages are caused by distribution network failures. Therefore, it is necessary to use the reliability assessment method to evaluate the reliability of the distribution network to provide a basis for the planning and operation decision of the distribution network. The large distribution netwo...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCY04S10/50
Inventor 王韶谭文王熙晏健张煜成刘沛铮王理丽张知
Owner CHONGQING UNIV