Three-phase unbalance evaluation method of distribution transformer low-voltage side current based on comprehensive weighting
A low-voltage side, distribution transformer technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of unbalanced evaluation of three-phase currents on the low-voltage side of distribution transformers, unbalanced three-phase currents on the low-voltage side of distribution transformers, etc. , to achieve the effect of good practical value
Active Publication Date: 2022-04-01
FUJIAN AUTOMATION ELECTRIC POWER TECH
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The purpose of the present invention is to solve the problem of unbalanced evaluation of three-phase currents on the low-voltage side of distribution transformers. Combining with the characteristics of the distribution network, a comprehensive weighted evaluation method for unbalanced currents on the low-voltage side of distribution transformers is provided.
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
[0034] The present invention is described in detail below:
[0035](1) Establish real-time maximum current three-phase unbalance rate RMAI To record the real-time maximum unbalance of the three-phase current on the low-voltage side of the distribution transformer;
[0036] (2) Establish real-time minimum current three-phase unbalance rate RMNI To record the real-time minimum unbalance of the three-phase current on the low-voltage side of the distribution transformer;
[0037] (3) Establish real-time median current three-phase unbalance rate RMDI To record the real-time median unbalance of the three-phase current on the low-voltage side of the distribution transformer;
[0038] (4) Establish real-time average current three-phase unbalance rate RAVI To record the real-time average unbalance of the three-phase current on the low-voltage side of the distribution transformer;
[0039] (5) Establish real-time comprehensive weighted current three-phase unbalance rate RALI T...
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 method for assessing current three-phase unbalance at the low-voltage side of a distribution transformer based on comprehensive weighting, including: establishing a real-time maximum current three-phase unbalance rate RMAI To record the real-time maximum unbalance of the three-phase current on the low-voltage side; establish the real-time minimum current three-phase unbalance rate RMNI To record the real-time minimum unbalance of the three-phase current on the low-voltage side; establish the real-time median current three-phase unbalance rate RMDI To record the real-time median unbalance of the three-phase current on the low-voltage side; establish the real-time average current three-phase unbalance rate RAVI To record the real-time average unbalance of the three-phase current on the low-voltage side; establish a real-time comprehensive weighted current three-phase unbalance rate RALI To record the real-time comprehensive unbalance of the three-phase current on the low-voltage side; according to the real-time comprehensive weighted current three-phase unbalance rate RALI and three-phase current unbalance rate limit RIVL Comprehensively evaluate the three-phase unbalanced state of the low-voltage side current. This evaluation method can effectively reflect the unbalanced condition of the three-phase current on the low-voltage side.
Description
technical field [0001] The invention relates to the field of electric energy quality of a distribution network, in particular to a method for evaluating the three-phase unbalance of a low-voltage side current of a distribution transformer based on comprehensive weighting. Background technique [0002] At present, with the rapid development of the economy, a large number of high-tech industrial parks are put into operation. These high-tech parks rely on high-precision automatic control equipment to realize the production and manufacturing of products. With the extensive application of high-precision electronic products, power quality problems are becoming more and more important. The problems that people pay attention to, the sudden drop or rise of voltage, the imbalance of three-phase voltage and current, harmonic distortion, etc. will all lead to the shutdown of high-precision electronic production equipment, endanger production safety, and cause major economic losses and so...
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): H02J3/00
CPCH02J3/00
Inventor 梁安韬吴孝彬许为松沈忠福徐士华赵晖梁丽军孙振业庄小龙
Owner FUJIAN AUTOMATION ELECTRIC POWER TECH