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Site Selection and Capacity Calculation Method of Flexible DC Access Point

A technology of flexible DC and calculation methods, applied in the direction of power transmission AC network, etc., can solve the problems such as the ineffective effect of site selection and fixed capacity, and restrictions on the promotion and application of HVDC

Active Publication Date: 2022-06-24
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the existing research methods, there are few factors considered comprehensively, and the effect of site selection and capacity determination is relatively inconspicuous, which seriously restricts the promotion and application of HVDC

Method used

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  • Site Selection and Capacity Calculation Method of Flexible DC Access Point
  • Site Selection and Capacity Calculation Method of Flexible DC Access Point
  • Site Selection and Capacity Calculation Method of Flexible DC Access Point

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Embodiment Construction

[0057] like figure 1 Shown is a schematic flow chart of the method of the present invention: the method for site selection and capacity calculation of the flexible DC access point provided by the present invention includes the following steps:

[0058] S1. Determine the range of the power grid to be analyzed, calculate all overload scenarios and overload lines within the range of the power grid to be analyzed, so as to construct a set of overload scenarios and a set of overloaded lines; specifically, the following steps are used to construct a set of overloaded scenarios and overloaded lines:

[0059] A. Use the following formula to calculate the branch load rate

[0060]

[0061] in the formula is the load rate of line k under working scenario s; s is any working scenario of the power grid within the grid to be analyzed; is the active power of line k under working scenario s; is the thermal limit value of line k;

[0062] B. The branch load rate calculated accordi...

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Abstract

The invention discloses a site selection and capacity calculation method for a flexible DC access point, which includes determining the scope of the power grid to be analyzed and constructing an overload scene set and an overload line set; calculating the weight factor of the overload line in each overload scene to obtain all flexible The power sensitivity of the DC access point position to the overloaded line; calculate the comprehensive sensitivity of the VSC-HVDC located at each flexible DC access point to all overloaded lines; construct a candidate access point set; construct a different The multi-objective optimization model of the scene is solved to obtain the capacity configuration result of each candidate access point; the candidate access point set and the capacity configuration result of the candidate access point are evaluated to obtain the final site selection result of the flexible DC access point and capacity allocation results. The method of the invention can effectively reduce the overload problem of the AC line in the N-1 scene, and has high reliability and good effect.

Description

technical field [0001] The invention belongs to the field of electrical automation, and particularly relates to a method for site selection and capacity calculation of a flexible direct current access point. Background technique [0002] With the development of economy and technology and the improvement of people's living standards, electric energy has become an indispensable secondary energy in people's production and life, bringing endless convenience to people's production and life. [0003] With a large number of renewable energy sources such as large-scale wind and solar power generation being connected to the power grid, and the widespread application of distributed power sources in active distribution networks, the random and intermittent characteristics of such energy sources make the source and load sides of the power grid appear uncertain. . This uncertainty has brought many impacts on the safe and stable operation of the power grid. Therefore, it is necessary to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36
CPCH02J3/36Y02E60/60
Inventor 章德李云丰周洋蒋童禹海峰李梦骄谢欣涛侯益灵李勇马俊杰
Owner STATE GRID HUNAN ELECTRIC POWER
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