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New energy base direct-current outgoing chain off-network early warning and defense system and method

A chain off-grid and new energy technology, which is applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve the problems of excessive calculation burden, affecting the timeliness of online analysis, and no online defense chain off-network, etc.

Active Publication Date: 2019-05-03
NARI TECH CO LTD +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, online analysis and calculation mainly adopt artificially preset fault sets. Due to the limitation of the scale of the fault set, there may be omissions in the fault setting. If too many faults are set, it will bring an excessive calculation burden and affect the timeliness of online analysis and calculation; in addition , there is currently no effective online defense chain off-network control strategy generation method

Method used

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  • New energy base direct-current outgoing chain off-network early warning and defense system and method
  • New energy base direct-current outgoing chain off-network early warning and defense system and method

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Embodiment Construction

[0049] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0050] In order to achieve the purpose and effect of the technical means, creation features, work flow, and use method of the present invention, and to make the evaluation method easy to understand, the present invention will be further described below in conjunction with specific examples.

[0051] The present invention will be further described below with reference to the accompanying drawings and in conjunction with examples.

[0052] Such as figure 1 As shown, a chain off-grid early warning and defense system for DC external transmission of new energy bases, including a chain off-grid online identification subsystem, a chain off-grid early warning subsystem, and a chain off-grid defense strategy ...

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Abstract

The invention discloses a new energy base direct-current outgoing chain off-network early warning and defense system. The system comprises a chain off-network online identification subsystem, a chainoff-network early warning subsystem and a chain off-network defense strategy online optimization subsystem. A machine learning method is adopted to obtain key influence factors influencing chain off-network and predict whether new energy chain off-network occurs or not after anticipated faults. A cascading failure is judged according to the off-network condition of the transient stability simulation fan after failure. The new energy cascading off-network risk assessment is carried out. The prevention control and emergency regulation plan strategy online optimization calculation are carried outon the anticipated failure where cascading off-network may happen. The requirements for improving the operation reliability and reducing the operation risk of direct current delivery of a new energybase are met.

Description

technical field [0001] The invention belongs to the technical field of electric power system automation, and in particular relates to a new energy base direct current external transmission chain off-grid early warning and defense system and method. Background technique [0002] With the rapid increase in the penetration rate of new energy, the imbalance between the output of new energy and the output of conventional units has intensified, and the problems of frequency and voltage caused by power imbalance are more prominent. The new energy base of the Northwest Power Grid is sent out through UHV DC. The weak immunity of the new energy units makes the new energy units chain off-grid when the grid is disturbed or fails, which seriously affects the safe and stable operation of the power system. [0003] In terms of the cascading off-grid mechanism of DC external transmission in new energy bases, scholars at home and abroad have conducted detailed analysis and research on the ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 鲍颜红任先成徐伟徐泰山杜延菱刘韶峰张隽刘海涛孙为民邢晶周博
Owner NARI TECH CO LTD
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