Processing method for single-phase grounding signals in closed-loop operations
A single-phase grounding, processing method technology, applied in the direction of detecting faults, instruments, measuring devices, etc. according to the conductor type, can solve problems such as affecting the fault recovery time and ineffectiveness
Active Publication Date: 2019-08-20
JIANGSU ELECTRIC POWER CO +1
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The impact of the ring closing operation on the structure and power flow of the system at the moment is different from that during the steady state operation of the power grid. The ordinary "test pull" method for single-phase grounding sometimes cannot work during the ring closing operation, regardless of the actual situation, blindly Carrying out trial road processing can only affect the fault recovery time
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
[0029] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0030] figure 1 It is a flow chart of a method for processing a single-phase ground signal in a loop closing operation provided by the present invention.
[0031] figure 2 A schematic diagram of partial power supply wiring of the primary system of the regional power grid 220kV Wansheng substation, 110kV Qinnan substation, 35kV Yifeng substation, 35kV Beilong substation, and 35kV Dazonghu substation is given in the embodiment. In normal operation mode, the 35kV system of Qinnan Substation supplies the loads of Yifeng Substation and Beilong Substation, and the 35kV busbar of Wansheng Substation supplies the loads of Dazonghu Substation.
[0032] 110kV Qinnan Substation No. 1 and No. 2 main transformer high-voltage side knife switch to No. 1 and No. 2 main transformer intermediate gantry jumper wire clips are hot, and the No. 1 ...
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 processing method for single-phase grounding signals in closed-loop operations. The processing method specifically comprises the steps of receiving a single-phase groundingsignal sent by the background of a transformer substation or a monitor; judging whether the single-phase grounding signal is a mistaking signal or not; checking whether primary equipment in the substation has a fault or not; if the fault is not found in the substation, judging whether a closed-loop operation occurs or not before the signal is sent tout; if the closed-loop operation occurs, judginga neutral point grounding manner of a system; if neutral point grounding manner is arc suppression coil grounding, judging the operation condition of an arc suppression coil configured by the system;if an arc suppression coil device is operated abnormally, restarting the arc suppression coil device; and if the single-phase grounding signal of the system does not disappear after the restarting, directly turning to a trial line pull search module for processing, and if the signal disappears, directly ending the process. According to the influences, on the neutral point voltage, of the arc suppression coil compensation conditions, a method for searching single-phase grounding accidents via a line pull method is corrected, so that the processing efficiency for the single-phase grounding accidents during the closed-loop operations is improved.
Description
technical field [0001] The invention relates to the technical field of distribution network operation, in particular to a method for processing single-phase grounding signals in loop closing operations. Background technique [0002] Most of the distribution network system adopts the operation mode that the neutral point is not grounded or grounded through the arc suppression coil. When a single-phase ground fault occurs, the voltage of the fault relative to the ground decreases, and the voltage of the non-faulted phase rises to the line voltage, while the line voltage It still operates symmetrically and does not affect the continuous power supply to users. However, if the faulty phase line is operated under the line voltage for a long time, the weak link of the insulation may be broken down and develop into a phase-to-phase short circuit, which will expand the accident and affect the user's power supply. Therefore, in the operation of the power grid, it is generally stipula...
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 Applications(China)
IPC IPC(8): G01R31/02G01R31/08
CPCG01R31/086G01R31/50
Inventor 周红军刘炳华朱钦柏晶晶
Owner JIANGSU ELECTRIC POWER CO