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A two-stage optimization method for UHV grid at the receiving end

An optimization method and a two-stage technology, applied in design optimization/simulation, AC network circuits, special data processing applications, etc., can solve problems such as insufficient search direction, insufficient richness and depth, and unsatisfactory results, so as to achieve a clear optimization direction , Strong engineering application value, fast processing effect

Active Publication Date: 2020-07-17
RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER
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Problems solved by technology

[0004] At present, the research on the UHV network frame planning at the receiving end is not rich and deep enough, lacking a set of widely used standards and methods, most of them are based on the field experience of engineering personnel, and a large number of simulation tests are used to compare and analyze the feasible schemes. The optimized search direction is not clear enough, not pertinent, the workload is heavy and the results are not ideal

Method used

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  • A two-stage optimization method for UHV grid at the receiving end
  • A two-stage optimization method for UHV grid at the receiving end
  • A two-stage optimization method for UHV grid at the receiving end

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Embodiment

[0123] The present invention takes Shandong UHV power grid planning as an example, and optimizes the placement layout scheme and grid structure adjustment scheme for Shandong power grid to be connected to the UHV DC transmission system in 2020. Circuit breaker breaking capacity I z Set to 50kA, the scalarization vector λ is [0.75, 0, 0.25] based on the Delphi method, and the priority list of the first stage is shown in Table 1.

[0124] Table 1 Priority list of the first stage

[0125]

[0126]

[0127] The smaller the value of the objective function, the higher the priority of DC layout. It can be seen from Table 1 that the objective function value of Linyi 3 (Zhisheng) is 0.3969, which is the smallest value among all nodes. It can be considered to build a DC converter station here, which can effectively alleviate the power shortage in the central area of ​​Linyi. Yimeng Station is close to Zhisheng Station, both of which belong to the Linyi area. The 6 circuits of 50...

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Abstract

The invention discloses a double-phase optimization method for an ultra high voltage net rack of a receiving end. The method includes two phases. In the first phase, through comprehensive consideration of quantitative indexes of receiving end AC system intensity, voltage stability and network loss, a three-target optimization model is constructed; the model is solved based on a normalization method, a quantitative method and a Delphi method and a receiving end ultra high voltage drop point optimization layout scheme is determined through combination of a practical project. In the second phase,the optimization result of the first phase is taken as the basis; a weak link of the receiving end net rack structure is analyzed based on short circuit current level and a performance cost ratio index is adopted for searching the optimal adjustment scheme aiming at the weak link, and the receiving end net rack structure optimization adjustment scheme is acquired through repeated search-verification iteration solution.

Description

technical field [0001] The invention relates to the field of power system planning, in particular to a two-stage optimization method for a receiving-end UHV network frame. Background technique [0002] GEI aims to make full use of clean energy such as wind energy and solar energy, promote the transformation of the world's energy structure, and solve problems such as fossil energy depletion, climate change, and environmental pollution. It is a necessary way to achieve sustainable social and economic development in the future. UHV power grid technology is a key supporting technology for the development of the global energy Internet, and its planning and operation will be related to the security of energy supply across regions and even globally. With the development of UHV transmission technology and the gradual construction of the power grid, the receiving capacity and proportion of the receiving area continue to increase, and the impact of UHV grid access on the safety, stabi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06F30/20G06F30/17
CPCG06F30/17G06F30/20H02J3/00H02J2203/20Y02E60/00
Inventor 魏鑫曹相阳杨斌张丽娜刘晓明薄其滨魏佳
Owner RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER
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