Region screening method for alternating-current short-circuit test
A screening method and short-circuit test technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as damaging the normal operation of the power system, and achieve the effects of improving accuracy, accurate results, and simple operation
Active Publication Date: 2015-08-19
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Short-circuit faults can disrupt the normal operation of the power system
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 following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0036] see figure 1 , is a schematic flow chart of the first embodiment of the regional screening method of the AC short-circuit test provided by the present invention. The method mainly considers the AC short-circuit test of conventional DC commutation failure, and mainly includes the following steps:
[0037] Step 101: divide the DC transmission system in the AC-DC hybrid power grid into a first DC transmission system and a second DC transmission system according ...
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 region screening method for an alternating-current short-circuit test. The region screening method comprises the following steps: partitioning a direct-current power transmission system in an alternating current-direct current hybrid power grid into first direct-current power transmission systems and second direct-current power transmission systems, and building an electromagnetic transient detailed model for each first direct-current power transmission system; performing calculation to obtain a corresponding coordinate set; determining practical direct-current transmitting power; calculating a second inverter station converter transformer high-voltage bus fault-phase voltage drop; calculating the third inverter station converter transformer high-voltage bus fault-phase voltage drop of each first direct-current power transmission system and each second direct-current power transmission system when an alternating-current short-circuit fault occurs on each alternating-current bus; and screening a plurality of alternating-current buses according to the second and third inverter station converter transformer high-voltage bus fault-phase voltage drops, evaluating the comprehensive influences of the alternating-current buses on each second direct-current power transmission system, and screening corresponding test regions. Through adoption of the embodiment of the invention, the test requirement of a direct-current phase-change failure in the alternating-current short-circuit test can be considered fully; test results are ensured; and the influence of the test on the whole system is lowered.
Description
technical field [0001] The invention relates to the technical field of power system simulation and calculation analysis, in particular to an area screening method for an AC short circuit test. Background technique [0002] Short circuit refers to the occurrence of a path between all abnormal phases or phases and ground (for neutral grounded systems). The causes of the short circuit mainly include: aging of insulating materials, defects of the equipment itself, harsh weather conditions, man-made accidents such as pulling the switch with load, and other factors such as birds and animals jumping over the exposed current-carrying wires. Short-circuit faults can disrupt the normal operation of the power system. [0003] However, for some new systems or new equipment in the power grid (such as high-voltage direct current transmission systems, etc.), it is necessary to conduct AC short-circuit tests under operating conditions. From the perspective of system equipment commissioning...
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): G06F17/50G06Q50/06
CPCY02E60/00
Inventor 张帆赵勇洪潮
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD