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A method for estimating the capacity of a flexible HVDC system in an urban power grid

A flexible DC and power transmission system technology, applied in the direction of power transmission AC network, computing, instruments, etc., to achieve a reasonably determined effect

Inactive Publication Date: 2018-12-28
SHENZHEN POWER SUPPLY BUREAU +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the capacity selection of soft straight needs to take into account economic factors, site selection and land occupation, etc.

Method used

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  • A method for estimating the capacity of a flexible HVDC system in an urban power grid
  • A method for estimating the capacity of a flexible HVDC system in an urban power grid

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Embodiment Construction

[0022] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0023] Such as figure 1 As shown, a method for estimating the capacity of the flexible DC transmission system in the urban power grid includes the following steps:

[0024] Step 1. Obtain the active power demand of the power grid according to the target grid structure and target load;

[0025] Step 2. Obtain reactive power requirements according to the reactive power planning of the AC power grid;

[0026] Step 3. Capacity design to meet the demand;

[0027] Step 4. Determine the upper limit of the capacity of the Rouzhou DC Converter Station according to the flow capacity of the AC line connected to the Rouzhou DC Converter Station;

[0028] Step 5. Further refine ...

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Abstract

The invention provides a method for estimating the capacity of a flexible HVDC transmission system in an urban power grid, which comprises the following steps: step 1, acquiring the active power demand of the power grid according to a target grid frame and a target load; step 2, obtaining reactive power demand accord to that reactive power planning of an AC power grid; 3, designing the capacity tomeet the demand; 4, determining the upper limit of the capacity of a flexible direct converter station according to the throughflow capacity of the connected alternating current line of the flexibledirect converter station; step 5, further refining the capacity according to the selected device requirements. The invention can reasonably determine the capacity of the converter station of the flexible direct current transmission system in the urban power grid.

Description

technical field [0001] The invention belongs to the application field of flexible direct current transmission technology in urban power grids, and in particular relates to a method for estimating the capacity of flexible direct current transmission systems in urban power grids. Background technique [0002] With the rapid development of urban power grids, the grid structure of urban power grids is becoming more and more compact, leading to new problems in urban power grids, such as excessive short-circuit current, difficulties in power flow control, and unbalanced loads. Therefore, after the development of urban power grids to a certain scale The operating mode of fragmentation and partitioning has to be adopted, but the operation of fragmentation and partitioning will bring about the problem of reduced power supply reliability. For some important loads, short-term power outages will have a greater impact, so ensuring power supply reliability is a must An important task for ...

Claims

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Application Information

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IPC IPC(8): H02J3/36G06Q10/06G06Q50/06
CPCH02J3/36G06Q10/06315G06Q50/06Y02E60/60
Inventor 翁毅选林子钊程韧俐马伟哲史军何晓峰陈洪云程维杰
Owner SHENZHEN POWER SUPPLY BUREAU
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