Method for acquiring power flow of annular power distribution network based on virtual constant current load
A distribution network, constant current technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of complex numbering of nodes and branches, and achieve the effect of improving the overall monitoring capability
Active Publication Date: 2014-04-16
JIANGSU FANGCHENG ELECTRIC SCI & TECHCO
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The loop impedance method proposed by S.K Goswami and S.K Basu in 1991 takes the loop current as a variable and forms a loop from the root node of the feeder to each load point. According to Kirchhoff's voltage law, the loop current equation is listed. This method deals with mesh Strong capability, but the processing of node and branch numbers is complex
The forward push-back algorithm was originally developed from the hand calculation algorithm. When used for the power flow calculation of the radial distribution network, the efficiency of this algorithm is the highest among all algorithms, and it occupies very little memory. Due to its own advantages, the generation method has been continuously improved abroad and applied to actual production. Its disadvantage is that it needs special treatment when it is applied to a ring network.
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 Construction
[0040] see figure 1 , the present invention relates to a method for obtaining power flow of a ring-shaped distribution network based on a virtual constant current load. The steps of the method are:
[0041] Step 1. The computer obtains the network parameters of the distribution network from the distribution network management system,
[0042] Step 2. Form the branch set and connected branch set of the distribution network. The specific formation steps are as follows:
[0043] Step 2.1, obtain a node set and an edge set through the network parameters obtained in step 1;
[0044]Step 2.2. Set whether the processed flag of all nodes in the node set is False (that is, it has not been processed); initialize the stack, and push the root node in the node set into the stack (the node data is obtained from the distribution network management system When the computer already knows which node is the root node), set the whether the root node is processed flag to True, and initialize the...
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 relates to a method for acquiring a power flow of an annular power distribution network based on a virtual constant current load. The problem about the power flow is solved through two-layer iteration, a purely-radial network power flow which consists of branches is computed by using a forward back-substitution method during inner-layer iteration, and the injection current of nodes at two ends of each joining branch is continuously corrected during outer-layer iteration to realize global convergence. By adoption of the method for acquiring the power flow of the annular power distribution network based on the virtual constant current load, the annular power distribution network can be analyzed.
Description
technical field [0001] The invention relates to a method for obtaining the power flow of a circular distribution network based on a virtual constant current load, which is applied in the field of electric power monitoring. Background technique [0002] In the distribution network monitoring and management system, distribution network power flow is the most important function provided by advanced application software to dispatchers and planners. It is used to analyze the electrical status of the distribution network and check the cross-border range. Basic software for network analysis, used for voltage / var optimization, operation simulation and connection change analysis, etc. [0003] The distribution network has significant characteristics different from the transmission network: 1) The distribution network is basically a radial structure, or close to the radial network structure (weak ring structure); 2) The branch parameters r and x are not much different, sometimes even ...
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): H02J3/00G06F19/00
Inventor 张建兴
Owner JIANGSU FANGCHENG ELECTRIC SCI & TECHCO