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Method and system for adaptability evaluation of multi-DC sending-end power grid planning scheme

A technology for power grid planning and adaptability evaluation, applied in information technology support systems, data processing applications, forecasting, etc., can solve problems such as the complexity and vulnerability of the AC-DC hybrid grid structure

Active Publication Date: 2022-06-03
STATE GRID SICHUAN ECONOMIC RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the gradual expansion of the scale of UHV DC transmission, the grid structure, operation form and stability characteristics of the multi-DC transmission grid have undergone profound changes. The flexibility is increasing, and the adaptability of the grid is facing new challenges

Method used

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  • Method and system for adaptability evaluation of multi-DC sending-end power grid planning scheme

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] S2: Obtain the basic network information of the target planning scheme, and calculate the system strength according to the basic network information

[0076] The power load increase has a certain influence on the development of the power grid. The present invention is based on regional economic development.

[0078]

[0081]

[0085]

[0087] The construction of a large power grid can effectively improve the optimal configuration of clean energy across regions, and clean energy across regions can consume a certain proportion of energy.

[0088]

[0093] The adaptability of the power supply capacity ratio of the DC supporting lines can reflect the coordination adaptability of the power supply capacity of each DC line.

[0094]

[0096] The adaptation degree of the power supply capacity of the hydropower channel can reflect the power transmission capacity of the hydropower channel in the province and the hydropower channel in the province.

[0097]

[0100]

[0102] The short-...

Embodiment 2

Embodiment 3

plan in. Step S2 is performed on the target planning scheme, and the results of some indicators of system strength adaptability are obtained as shown in Table 1.

Table 1

The equivalent inertia of the system under the high and low operating modes

[0118] Unit: Second

[0119]

[0120] The operation of step S3 is carried out to the target planning scheme, and the partial index results are obtained as shown in Table 2.

Table 2

Power balance factor

[0123] Unit: 10,000 kVA, 10,000 kilowatts

[0124]

Operation mode Transformer capacity Reference value of power balance coefficient of external load in the province

Fengda way 3408266506634.32.57>1.1

Withered mode 320106439.428803.43>1.2

[0125] System Loss Conditions

[0126] Unit: 10,000 kilowatts, 10,000 kilowatts

[0127]

[0128] Multi-DC send out short-circuit ratio

Unit: MW, MVA

[0130]

Carry out step S4 operation to target planning scheme, obtain partial index result as shown in table 3, finally according to e...

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Abstract

The invention discloses a method and system for assessing the adaptability of a multi-direct current sending end power grid planning scheme, and relates to the technical field of power system security. The second parameter among the economic development adaptability parameters, energy structure adaptability parameters and system strength adaptability parameters is obtained by power flow calculation based on the mode information; the stability simulation of the target planning scheme is carried out according to the operation failure situation, and the safety and stability adaptability parameters are obtained; The adaptability evaluation results are obtained after comprehensive evaluation of economic development adaptability parameters, energy structure adaptability parameters, system strength adaptability parameters, and security and stability adaptability parameters. By considering multiple influencing factors, the present invention conducts a comprehensive evaluation from the perspective of the overall adaptability of the grid, which can effectively reflect the adaptability of the sending-end grid for supporting large-scale direct current transmission.

Description

Method and system for adaptability evaluation of multi-DC transmission-end power grid planning scheme technical field The present invention relates to the technical field of power system security, more specifically, it relates to the planning method of the multi-DC transmission end power grid. Case suitability assessment method and system. Background technique Due to the characteristics of reverse distribution of energy resources and electricity demand in my country, the power transmission from west to east has become the Strategic measures for optimal allocation of resources. In order to meet the urgent need of long-distance, large-capacity and cross-regional delivery of hydropower resources in the western region It is necessary to build a multi-circuit UHV large-capacity DC transmission channel to become a key way to solve the problem. With UHVDC transmission With the gradual expansion of the power scale, the grid pattern, operation form and stability characteris...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q10/04G06Q50/06
CPCG06Q10/06393G06Q10/04G06Q50/06Y04S10/50
Inventor 杜新伟袁川李博乔云池唐权胥威汀李婷王云玲苟竞文云峰
Owner STATE GRID SICHUAN ECONOMIC RES INST
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