Connection analysis method of relay protection circuit of power system bus
A power system and relay protection technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of high staff requirements, time-consuming and labor-intensive relay protection lines, etc., and achieve lower technical requirements and wiring analysis work Simplified, easy-to-operate effects
Active Publication Date: 2012-05-16
西安爱邦电子系统有限公司
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0020] In order to solve the situation that it is time-consuming and labor-intensive to judge the wiring error of the relay protection line under manual conditions, and has high requirements for the staff, the present invention provides a power relay protection with high reliability of judgment and analysis, safe and simple use, and convenient operation. Wiring Analysis Method in Circuit
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
[0065] The invention provides a wiring analysis method of a bus relay protection circuit in a power system, and the specific flow of the wiring analysis is as follows:
[0066] 1) Obtain the measured values and parameters of the bus differential protection line:
[0067] Obtain the current effective value and phase of each line of the bus differential protection line through instrument measurement, and the current effective value of any line is the current effective value of the A, B, C, and N phases of the line. A reference voltage needs to be selected during measurement, and the current phase of all lines to be measured refers to the phase of the measured current relative to the reference voltage. Throughout the measurement process, the measurement reference is always this voltage, that is, the phase of all line currents on the bus is relative to the phase of this reference voltage. The reference voltage can be selected by the operator during the measurement.
[0068] En...
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 connection analysis method of a relay protection circuit of a power system bus, comprising the following steps of: (1) acquiring measured values and parameters of a bus differential protection circuit; (2) carrying out conversion on the measured values of the bus differential protection circuit according to the bus parameters; (3) judging whether the connection is correct or not according to the converted measured values of the bus differential protection circuit; (4) carrying out the first-time correction and judging; (5) carrying out the second-time correction andjudging; (6) generating corrected current effective values and storing the corrected value meeting correctness conditions; and (7) outputting analysis results. The invention provides the connection analysis method of the relay protection circuit of the power system bus, with high judgement and analysis reliability, convenient use and convenient operation.
Description
technical field [0001] The present invention relates to a wiring analysis method of a relay protection circuit in a power system, in particular to a method for analyzing and judging whether the wiring of a current transformer CT of a bus differential protection circuit in a power system is correct, and giving the error location and error type The wiring analysis method. Background technique [0002] For bus differential protection, it is necessary to calculate the resultant vector of the input line and the resultant vector of the output line. When all lines meet the phase angle balance, that is, the difference between phases is 120°, and the phase sequence is the same. At the same time, when the vector sum of each phase of the input line synthesis vector and the output line synthesis vector is zero, that is, the amplitude is equal and the angle difference is 180°, it can be judged that the wiring is correct. [0003] Combining the two methods, the conditions for correct wi...
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): G01R31/02
Inventor 穆明建
Owner 西安爱邦电子系统有限公司