Simulation method for assessing high voltage transformer substation line incoming segment lightning safety
A simulation method and substation technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems affecting the communication security and normal operation of UHV transmission systems, so as to improve communication security and reliability, improve Lightning strike reliability, guarantee the effect of normal operation
Active Publication Date: 2015-04-29
STATE GRID CORP OF CHINA +2
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Problems solved by technology
In the UHV substation, there have been many failures that the outgoing OPGW optical cable discharges to the substation gantry and breaks, which seriously affects the communication security and normal operation of the UHV transmission system.
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[0041]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 making creative efforts fall within the protection scope of the present invention.
[0042] Such as figure 1 As shown in the present invention, a simulation method for evaluating the lightning strike safety of the incoming section of the UHV substation comprises the following steps:
[0043] I-1, set up multiple electromagnetic transient distribution parameter simulation calculation models; the connection mode of the OPGW optical cable in the different electromagnetic transient distribution parameter simulation calculation models and the bott...
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The invention provides a simulation method for assessing the ultra high voltage transformer substation line incoming segment lightning safety. The method includes computing a transient voltage level value of the ultra high voltage transformer substation line incoming segment and transformer substation structure in different connecting manners when a lightning failure occurs, in a simulated manner, assessing the lightning safety of an OPGW cable of total simulation computation models in different connecting manners and analyzing the breaking reason according to the transient voltage level value, and adjusting the connecting manner of a door frame of the ultra high voltage transformer substation line incoming segment and the OPGW cable according to the total simulation computation models with the highest lightning safety. The simulation method simulates the lightning process of the ultra high voltage transformer substation line incoming segment accurately, the highest lightning safety of the ultra high voltage transformer substation line incoming segment can be achieved after adjustment, the lightning reliability of the ultra high voltage transformer substation line incoming segment is improved greatly, the communication safety and reliability of an ultra high voltage transmission system are improved, and the normal operation of the ultra high voltage transmission system is guaranteed.
Description
technical field [0001] The invention relates to the technical field of ultra-high voltage power transmission, in particular to a simulation method for evaluating the lightning strike safety of an incoming line section of an ultra-high voltage substation. Background technique [0002] The application of UHV substations has greatly improved the transmission capacity of the power grid. The power transmission amount and power transmission distance are improved, so the transmission efficiency of the power grid is greatly improved. In the construction of UHV substations, due to the small distance between the ground wire and the insulator parallel gap between the top of the substation frame, when lightning strikes the incoming line section, the overvoltage on the ground wire will cause the gap to break down; the outgoing OPGW optical cable is prone to occur in the substation. Accidents of broken strands due to discharge of substation gantry. In the UHV substation, there have been...
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Login to View More IPC IPC(8): G06F17/50
CPCY02E60/00
Inventor 范冕戴敏万磊李志军李振强王磊何慧雯娄颖
Owner STATE GRID CORP OF CHINA