A method for identifying abnormal measurement errors of high-voltage voltage transformers in double busbar structure
A voltage transformer, abnormal identification technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of inaccurate power measurement, affecting the fairness of power trade, load fluctuation, etc., to improve robustness, eliminate external Influence of environmental factors, effect of improving real-time performance
Active Publication Date: 2021-03-23
武汉格蓝若智能技术股份有限公司
View PDF8 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, due to the difficulty of power outages on high-voltage transmission lines, it is difficult to obtain the operating status of HVPT in time
In addition, the existing online detection methods cannot cope with complex and changeable power system operating conditions, such as large fluctuations in voltage imbalance caused by a large number of electric arc furnaces, high-speed rail and other asymmetric loads, and seasonal load fluctuations, etc.
If the measurement error of HVPT is too large, it will lead to inaccurate power measurement and affect the fairness of power trade. In severe cases, it will affect the relay protection device and threaten the safe and stable operation of the power system.
Existing detection methods are no longer suitable for the operation requirements of smart substations for HVPT online monitoring
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
[0035] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0036] This embodiment provides a method for identifying abnormal measurement errors of high-voltage voltage transformers in a double-busbar structure, based on figure 1 In the shown topology of the double-bus wiring structure, two sets of bus bars are connected through a bus tie switch, and each phase of the two sets of bus bars is provided with a high-voltage voltage transformer. The primary voltages of any two high-voltage voltage transformers in the same phase are consistent, and the primary voltages of the high-voltage voltage transformers on each set of double buses are dynamically balanced. The method for identifying the abnormal measurement error of the high-voltage voltage transformer in the double-bus stru...
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 identifying abnormal measurement errors of high-voltage voltage transformers in a double busbar structure, comprising the following steps: S1, collecting measurement data of high-voltage voltage transformers; Correlation system measurement ε judges whether there is any abnormality in the same-phase high-voltage voltage transformer, and obtains the phase number of the abnormal high-voltage voltage transformer; S3, respectively calculates and compares the three-correlation system measurement Q of the high-voltage voltage transformer on the two groups of buses, Determine the group number of the abnormal high-voltage voltage transformer; S4, determine the abnormal high-voltage voltage transformer according to the obtained phase number and group number of the abnormal high-voltage voltage transformer. The invention can grasp the running state of the high-voltage voltage transformer in real time, is not affected by periodic fluctuations of external environmental factors, provides guidance for online monitoring and operation and maintenance of the high-voltage voltage transformer, and reduces the risk of abnormal high-voltage voltage transformer operation.
Description
technical field [0001] The invention relates to the field of power equipment performance evaluation methods, in particular to a method for identifying abnormal measurement errors of high-voltage voltage transformers in a double-bus structure. Background technique [0002] Potential transformers are widely used equipment in power systems, and their secondary output voltages are widely used in measurement, status monitoring and relay protection. High Voltage Potential Transformer (HVPT) mainly refers to the voltage transformer used in the power system with a voltage level above 35kV, usually including electromagnetic transformer, capacitive voltage transformer, electronic voltage transformer, etc. [0003] During long-term operation, due to the influence of temperature, electromagnetic field and other factors, the measurement performance of HVPT will gradually decline, resulting in changes in measurement errors. Therefore, it is necessary to obtain the operating status of the...
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): G01R35/02
CPCG01R35/02
Inventor 李红斌陈庆焦洋张传计鲍志威
Owner 武汉格蓝若智能技术股份有限公司