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Extra-high voltage power grid transverter wattless configuration method based on short-circuit ratio

A configuration method, UHV DC technology, applied in reactive power compensation, circuit devices, power transmission AC network, etc., can solve the problem that the configuration capacity has not been effectively used

Inactive Publication Date: 2017-09-05
STATE GRID CORP OF CHINA +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the selection of the appropriate reactive power compensation device according to the short-circuit ratio of the system has been effectively applied in engineering, there is no specific configuration capacity of reactive power compensation in the converter station of the multi-infeed HVDC transmission system based on the short-circuit ratio. be effectively applied

Method used

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Embodiment Construction

[0070] The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0071] Such as figure 1 , figure 2 , image 3 As shown, a UHV grid converter reactive power configuration method based on the short-circuit ratio includes the following steps:

[0072] Step 1) determine the target grid structure to be analyzed and its related parameters;

[0073] Step 2) programming the power system operation mode;

[0074] ① Determine the load and power generation data according to the actual situation of the power grid in the region,

[0075] ② According to the flow direction of the system power flow and the situation of the cross-section power flow, determine the power balance of the power grid in the region,

[0076] ③Determine the operation mode of the system according to the power flow results, generator start-up and load conditions;

[0077] Step 3) Select a specific operation mode and calculate the syste...

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Abstract

The invention discloses a multi-infeed extra-high voltage power grid transverter wattless configuration method based on a short-circuit ratio. The extra-high voltage power grid transverter wattless configuration method comprises steps of 1) determining an object grid structure to be analyzed and related parameters, 2) arranging operation modes of an electric power system, 3) selecting a specific operation mode to calculate system load flows under different DC control modes, 4) calculating a multi-infeed short circuit ratio according to a load flow calculation result, 5) calculating a multi-infeed DC node voltage comprehensive improvement index, 6) determining a candidate node of the multi-infeed extra-high voltage DC power grid transverter wattless configuration n according to the multi-infeed DC node comprehensive improvement index, and 7) programming a single objective function optimization program according to an objective function to determine a wattless compensation capacity. The extra-high voltage power grid transverter wattless configuration method guarantees to reduce the operation cost of the power grid, guarantee the power grid to safely, reliably, economically, and efficiently operate, has significance and provides technical basis to planning design and operation control of the mmulti-infeed high voltage DC power grid.

Description

technical field [0001] The invention relates to a reactive power configuration method for an ultra-high voltage power grid, in particular to a reactive power configuration method for a multi-infeed UHV DC power grid converter based on a short-circuit ratio, and belongs to the technical field of power grid planning, design, operation and control. Background technique [0002] In large-scale, long-distance, large-capacity UHV DC transmission projects, if the DC landing point is located at the load center or grid hub, the principle of zero reactive power exchange is generally followed, that is, the reactive power required by the DC system under normal operating conditions is all provided by reactive power. Provided by the power compensation device, there is basically no reactive power exchange between the AC system and the DC system. During the fault period of the AC-DC system or during the recovery process after the fault, the reactive power required by the DC system changes, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36H02J3/16H02J3/18
CPCH02J3/16H02J3/18H02J3/36H02J2203/20Y02E40/30Y02E60/60
Inventor 王刚李家珏叶鹏马坤杜凌艳朱钰邵宝珠孙峰张涛戴鹏李胜辉禹加
Owner STATE GRID CORP OF CHINA
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