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A method and device for power grid low-voltage load shedding considering dynamic voltage support strength

A technology that supports strength and dynamic voltage, and is applied in the direction of AC network voltage adjustment, power network operating system integration, information technology support system, etc., to achieve the effect of improving resilience

Active Publication Date: 2022-06-07
JIANGSU ELECTRIC POWER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, the configuration scheme and setting method of low voltage load shedding need to be improved, and the optimization and coordination strategy needs to be further studied

Method used

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  • A method and device for power grid low-voltage load shedding considering dynamic voltage support strength
  • A method and device for power grid low-voltage load shedding considering dynamic voltage support strength
  • A method and device for power grid low-voltage load shedding considering dynamic voltage support strength

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Embodiment 1

[0028] Embodiment 1: A low-voltage load shedding method for a power grid considering dynamic voltage support strength, comprising the following steps:

[0029] Step 1: Calculate the short-circuit current per unit load of each node in the power grid.

[0030] In this step, the method for calculating the short-circuit current per unit load of the node is:

[0031]

[0032] in, is the unit load short-circuit current of the i-th node, I i is the short-circuit current of the i-th node when a short-circuit occurs, P i is the active load under the i-th node. BPA software can be used to calculate the unit load short-circuit current of each node in the power grid.

[0033] After calculating the short-circuit current per unit load of each node in the power grid, the nodes are sorted according to the order of short-circuit current per unit load from small to large, and a sequence reflecting the weak points of voltage recovery in the power grid is obtained.

[0034] Step 2: After...

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PUM

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Abstract

The invention relates to a low-voltage load shedding method for a power grid considering dynamic voltage support strength, comprising the following steps: step 1: calculating the unit load short-circuit current of each node in the power grid; step 2: after the voltage drops due to a fault in the power grid, The unit load short-circuit current cuts off the loads under the corresponding nodes in order from small to large. The present invention takes into account the actual conditions of different nodes in the power grid, so that the load shedding mode adopted when the voltage drops due to faults and other reasons has certain pertinence, and the judgment and control are carried out according to the unit load short-circuit current under each node, which is beneficial to the system Improvement of voltage recovery capability.

Description

technical field [0001] The invention belongs to the field of power grid analysis and control, in particular to a low-voltage load shedding technology of a power grid, in particular to a power grid low-voltage load shedding method and device considering dynamic voltage support strength. Background technique [0002] With the continuous expansion of the scale of the power grid, the increasingly complex network structure, the continuous growth of unit capacity and load, the commissioning of AC and DC ultra-high voltage equipment, the impact on economy and the environment, and the widespread adoption of new automatic control devices, the power grid has become Operating conditions closer to the stability limit. Combining the above factors, there will be new challenges and problems to ensure the safe and stable operation of the power grid. [0003] Low-voltage load shedding is an important measure for the power system to maintain safe, static and dynamic stability and economic op...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/14
CPCH02J3/14Y04S20/222Y02B70/3225
Inventor 潘琪赵磊王亮李冬梅文哲徐杭孟屹华
Owner JIANGSU ELECTRIC POWER CO