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Loop closing fixed value setting and checking method of ultra-high voltage alternating-current system

A UHV AC and fixed value setting technology, which is applied in the direction of AC network circuits, special data processing applications, instruments, etc., can solve the problem of accurately giving the UHV AC system ring closure and other problems, and achieves strong implementability and analysis Accurate, theoretically sound effects

Inactive Publication Date: 2017-02-01
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In order to solve the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a UHV AC system loop-closing setting checking method to solve the problem of how to reasonably and accurately give the UHV AC system loop-closing setting

Method used

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  • Loop closing fixed value setting and checking method of ultra-high voltage alternating-current system
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  • Loop closing fixed value setting and checking method of ultra-high voltage alternating-current system

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Embodiment 1

[0050] The following takes the Beijing East-Jinan UHV AC line closure as an example to describe in detail, and the network frame diagram is as follows image 3 shown. Among them, Beijing East-Jinan is an UHV AC double-circuit line, and Xin'an-Liaocheng and Huanghua-Binzhou are 500kV AC lines. These 6-circuit lines constitute the provincial section between the East China main grid and Shandong Power Grid. Such as figure 2 As shown, the specific implementation process of the method provided by the invention is as follows:

[0051] (1) Voltage difference setting:

[0052] First, the tap position of the UHV transformer is determined according to the voltage control of the UHV line and the operating voltage level of the power grid. In this embodiment, after the no-load lines are put into operation from Beijing East and Jinan respectively, in order to ensure that the voltage at the end of the line does not exceed 1100kV, it is necessary to control the busbar voltages of Beijing ...

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Abstract

The invention relates to a loop closing fixed value setting and checking method of an ultra-high voltage alternating-current system. The loop closing fixed value setting and checking method comprises a fixed value setting part and a fixed value checking part, wherein the fixed value setting part comprises loop closing voltage difference fixed value and phase angle difference fixed value setting. According to the loop closing fixed value setting and checking method of the technical scheme provided by the invention, reactive voltage and tidal current distribution of the ultra-high voltage alternating-current system are accurately analyzed, and a loop closing voltage difference fixed value is determined according to a tapping gear of an ultra-high voltage transformer, the operating level of network voltage and the like; a loop closing phase angle difference fixed value is determined according to section power and tidal current distribution before loop closing; whether the fixed values are feasible is checked according to the influence of loop closing impact power on the stability of a power system. The loop closing fixed value setting and checking method is suitable for the ultra-high voltage alternating-current power transmission system.

Description

technical field [0001] The invention relates to a setting and checking method of an ultra-high voltage AC system, in particular to a method for setting and checking the ring-closing setting of an ultra-high voltage AC system. Background technique [0002] The UHV AC system refers to the AC power system with a voltage level of 1000 kV and above. Ring closure refers to the closed operation of the network composed of lines, transformers or circuit breaker strings in the power system. For example, figure 1 The shown system 1 and system 2 have been connected through the AC line 1, the switch on one side of the AC line 2 is closed (shown in black), and the switch K on the other side (shown in white) is in the open state, then the operation of closing the switch K is Ring operation. [0003] When the voltage difference and phase angle difference on both sides of the loop closing point are too large, the power impact on the power system will be greater when the loop is closed, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50H02J3/00
CPCH02J3/00G06F30/20Y02E60/00
Inventor 王建明张健王琦褚晓杰任大伟贺庆吴萍郑彬
Owner CHINA ELECTRIC POWER RES INST
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