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Online decision-making method and device for inhibiting new energy linkage off-grid based on off-grid time sequence

A technology of chain off-grid and decision-making method, applied in circuit devices, AC network circuits, electrical components, etc., can solve problems such as the inability to effectively solve the problem of online operation mode optimization, adjustment and decision-making.

Active Publication Date: 2020-07-10
NARI TECH CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still unable to effectively solve the problem of optimal adjustment and decision-making of the online operation mode that inhibits the off-grid of new energy chains

Method used

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  • Online decision-making method and device for inhibiting new energy linkage off-grid based on off-grid time sequence
  • Online decision-making method and device for inhibiting new energy linkage off-grid based on off-grid time sequence
  • Online decision-making method and device for inhibiting new energy linkage off-grid based on off-grid time sequence

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Embodiment Construction

[0086] The present invention will be further described 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.

[0087] An embodiment of the present invention provides an online decision-making method for suppressing new energy chain off-grid based on off-grid timing, such as figure 1 shown, including the following steps:

[0088] S1, multi-source data integration based on grid state estimation data, SCADA, safety control measured information, offline typical low-voltage network model parameters, etc., taking into account DC system dynamic model, reactive power voltage control and protection model, FACTS device dynamic model, The control strategy of the second and third lines of defense and the frequency and voltage protection settings of wind power and photovoltaic new energy, use the set expected fault ...

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Abstract

The invention discloses an online decision-making method and an online decision-making device for inhibiting new energy linkage off-grid based on an off-grid time sequence. The method is characterizedby, for an anticipated fault set of which the new energy linkage off-grid amount does not meet the requirement, identifying a key new energy unit of linkage off-grid according to the new energy off-grid time sequence characteristics; calculating control performance indexes of new energy unit, capacitive reactance device, direct current and the conventional unit measures for inhibiting the new energy off-grid according to the off-grid reasons of the key new energy unit; screening out effective control measures, carrying out sorting according to measure priorities and the control performance indexes, and carrying out enumerating and combining to generate a decision scheme; and solving an auxiliary decision scheme which is minimum in control cost and meets the requirements of safety, stability and new energy off-grid margin through cluster parallel check. On the premise of ensuring safe and stable operation of the power grid, decision support is provided for improving the grid-connectedreliability and the absorptive capacity of new energy.

Description

technical field [0001] The invention belongs to the technical field of power system safety and stability control, and in particular relates to an online decision-making method and device for suppressing new energy chain off-grid based on off-grid sequence. Background technique [0002] With the large-scale integration of high-permeability new energy into the grid, due to the intermittent and fluctuating output of new energy and the operation of large-scale power electronic devices, the safety and stability of the power grid is becoming more and more complicated. After AC and DC failures, new energy units will be triggered Chain off-grid is not only not conducive to the reliable transmission and consumption of new energy, but also has an adverse impact on the safe and stable operation of the power grid. In order to suppress the new energy chain off-grid after the failure, the main work currently carried out includes three aspects. One is to improve the frequency and voltage r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00
Inventor 任先成徐伟徐泰山鲍颜红摆世彬夏小琴田志浩郑亮蒙金有吴峰钟海亮陈颖杰项丽谢丽军
Owner NARI TECH CO LTD
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