Method for acquiring alternating-current and direct-current transmission application range

A technology of AC and DC power transmission and scope of application, applied in data processing applications, system integration technology, instruments, etc., can solve problems such as unclear conclusions, single consideration factors, and inability to guide the planning and selection of power grid transmission methods.

Active Publication Date: 2013-08-07
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are many researches on the scope of AC and DC transmission in China, and some achievements have been made, which have certain guiding significance for the construction of my country's power grid, but there are also shortcomings such as lack of systematic methods and unclear conclusions.
According to the analysis of the economic transmission distance, some studies have proposed the scope of application of UHV AC, UHV DC and EHV AC, and the considerations are relatively simple; some literatures have proposed that UHV AC is mainly positioned at short-distance lar

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  • Method for acquiring alternating-current and direct-current transmission application range
  • Method for acquiring alternating-current and direct-current transmission application range
  • Method for acquiring alternating-current and direct-current transmission application range

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Embodiment

[0081] The following mainly takes the transmission capacity of 7 million kilowatts and the transmission distance of 400 kilometers to 600 kilometers as an example. The specific application process and solution steps are as follows:

[0082] The first step: the establishment of an economically optimal AC / DC transmission model.

[0083] Use attached figure 2 And attached image 3 The AC and DC transmission model economic optimization program establishes the AC and DC transmission models. The AC transmission model includes its voltage level, the number of lines and the degree of series compensation, and the DC transmission model includes its voltage level and wire cross-sectional area, as shown in Table 1 and Table 2. shown.

[0084] Table 1 AC transmission model

[0085]

[0086] Table 2 DC transmission model

[0087] Transmission capacity (10,000 kilowatts)

[0088] The second step: Construction of AC and DC comprehensive evaluation index system

[0089] Acco...

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Abstract

The invention relates to a method for acquiring an alternating-current and direct-current transmission application range. The method includes building various alternating-current and direct-current transmission models with high-voltage grades from a power source to a receiving-end power grid under the condition of given transmission distances and transmission capacity; creating a comprehensive evaluation index system of an alternating-current and direct-current transmission mode with consideration of various factors such as power transmission characteristic, electromagnetic environmental characteristic and economical efficiency on the basis of the alternating-current and direct-current transmission models; and combining the alternating-current and direct-current transmission models by the aid of a comprehensive optimization process on the basis of the optimal combined weight and comprehensively optimizing the alternating-current and direct-current transmission mode in a plurality of groups of typical transmission scenes to acquire the application range of the alternating-current and direct-current transmission mode by means of summarization. The method has the advantages that the method has high reference value for constructing a future power grid, and particularly provides reference for selecting outgoing transmission modes for various major energy bases.

Description

technical field [0001] The invention relates to a method for selecting the applicable range of power transmission, in particular to a method for obtaining the applicable range of AC and DC power transmission. Background technique [0002] UHV DC and AC have the technical advantages of long-distance and large-capacity transmission, which is conducive to saving transmission corridors, reducing line losses, and improving transmission capacity, and can meet the requirements of large-scale cross-regional transmission in my country in the future. AC transmission and DC transmission have different technical characteristics. AC has a network function, which can flexibly collect, transmit and distribute power, and requires the coordination and cooperation of various voltage levels; the stronger the grid structure, the greater the transmission capacity. DC is a point-to-point power transmission method. It is necessary to choose a reasonable voltage level according to the transmission...

Claims

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Application Information

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IPC IPC(8): G06Q50/06
CPCY04S10/545Y02E40/76Y02E40/70Y04S10/50
Inventor 邓永辉刘建琴彭晓涛夏俊丽高艺罗金山王丹
Owner STATE GRID CORP OF CHINA
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