Active power distribution network voltage control method based on power voltage sensitivity analysis

A technology of voltage sensitivity and voltage control, which is applied in the direction of AC network voltage adjustment, etc., can solve problems such as failure to meet the requirements of system voltage quality, and achieve the effects of easy implementation, reduction of data volume, and improvement of computing efficiency

Inactive Publication Date: 2019-09-13
JIANGSU ELECTRIC POWER CO +2
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Problems solved by technology

However, with the increase of penetration rate, the traditional single-layer optimal control technology cannot achieve flexible and efficient utilization of multiple distributed power sources, nor can it meet the requirements for system voltage quality of large-scale distributed power sources connected to the distribution network.

Method used

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  • Active power distribution network voltage control method based on power voltage sensitivity analysis
  • Active power distribution network voltage control method based on power voltage sensitivity analysis
  • Active power distribution network voltage control method based on power voltage sensitivity analysis

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Embodiment Construction

[0038] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings. figure 1 It is the voltage control area division diagram of the present invention.

[0039] image 3 For the distribution network DIgSILENT simulation model in a certain area, the present invention provides a kind of active distribution network voltage control method based on reactive voltage sensitivity analysis, and described method comprises the following steps:

[0040] Step 1: Carry out DIgSILENT modeling on the distribution network and conduct voltage simulation analysis, such as image 3 shown;

[0041] Step 2: Determine the main nodes for reactive power and voltage control in the distribution network. In this example, the AC400V bus is used as the main node, such as image 3 shown;

[0042] Step 3: Based on image 3 The distribution network model shown is decoupled to calculate the change value of the node vol...

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Abstract

The invention discloses an active power distribution network voltage control method based on power voltage sensitivity analysis. The active power distribution network voltage control method comprisesthe following steps of 1, acquiring power distribution network parameters, establishing a power distribution network simulation model, and carrying out voltage simulation analysis; 2, determining themain nodes in the power distribution network as voltage control objects; 3, obtaining a sensitivity matrix of the main node voltage and active-reactive power of a power distribution area; 4, dividingthe main node voltage control area into an allowable interval, an operation interval and a control interval; 5, monitoring the main node voltage in the power distribution network and each power control equipment (comprising distributed generation), wherein when the sampling voltage of the main nodes continuously exceeds the allowable interval for three times, a power regulation target value is issued to each power control equipment according to the sensitivity matrix, and voltage control is carried out; and 6, realizing power adjustment of each equipment by control, so that the voltages of themain nodes are controlled within the operation interval. The method is simple, practical and easy to implement.

Description

technical field [0001] The invention belongs to the field of automatic voltage control of distribution networks, and in particular relates to an active distribution network voltage control method based on power voltage sensitivity analysis. Background technique [0002] The structure of the distribution network is different from that of the transmission network. The R / X is relatively large, and both active power and reactive power greatly affect the voltage. Therefore, in the distribution network with active power and reactive power, the coordinated control of active power and reactive power can effectively improve the voltage control capability. [0003] In the existing AVC control operation system of the distribution network, there is a lack of optimal dispatching means for distributed power sources. Because the system design is based on the characteristics of passive networks, it does not have the dispatching function. When the penetration rate of distributed power is lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/12
CPCH02J3/12H02J2203/20
Inventor 车凯陶琼吴敏秀王德顺王靓赵上林王升波孙博陆圣芝叶季蕾李骋薛金华
Owner JIANGSU ELECTRIC POWER CO
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