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A method for starting a dynamic partition scheme in a power grid emergency

A dynamic partitioning and emergency state technology, applied in the direction of AC network voltage adjustment, etc., can solve problems such as lack of research, and achieve the effect of strong operability, simple calculation, and real and credible start-up threshold

Active Publication Date: 2017-07-07
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

At present, there is still a lack of relevant research on the starting criteria of the zoning scheme.

Method used

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  • A method for starting a dynamic partition scheme in a power grid emergency
  • A method for starting a dynamic partition scheme in a power grid emergency
  • A method for starting a dynamic partition scheme in a power grid emergency

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Embodiment Construction

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and examples. However, the invention is not limited to the examples given.

[0020] The emergency state of the power grid mainly refers to the unstable state of the power grid after various operating constraints are broken. The dynamic partition technology targeted by the present invention is mainly aimed at entering an abnormal operation state due to its own vulnerability after the power grid is disturbed by internal and external disturbances. This state does not necessarily lead to the situation that the constraint condition exceeds the limit. When the margin left by the operating constraints is less than a certain threshold, it can be considered that the power grid enters an emergency state. This paper considers the factors that may cause the power grid to enter an emergency state when the power side and the load side change abnormally, such as insufficient ac...

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Abstract

The invention discloses a method for starting a dynamic partitioning scheme under the condition of power grid emergency, and the method comprises the following steps: 10) measuring and calculating an impedance modulus index value of a weak node in each partitioned power grid; 20) building a relation between a power margin and an impedance modulus index; 30) measuring and calculating a threshold value of the impedance modulus index according to a set power margin limit and a formula (1); 40) comparing the impedance modulus index values, obtained at step 10), of all weak node in the partitioned power grids with the threshold value, measured at step 30), of the impedance modulus index: starting the dynamic partitioning scheme if the impedance modulus index value of any one weak node in the partitioned power grid is less than the threshold value of the impedance modulus index; or else, indicating that the voltage of the partitioned power grids are safe at this moment, and returning to step 10). The method can achieve the starting of dynamic partitioning under the condition of power grid emergency, and guarantees the reliability of power supply.

Description

technical field [0001] The invention belongs to the technical field of emergency control of a large power grid, and in particular relates to a method for starting a dynamic partition scheme in a power grid emergency state. Background technique [0002] The interconnection of regional power grids, the rapid development of UHV AC and DC systems, and the basic formation of long-distance large-capacity transmission patterns have greatly strengthened the electrical connection between large power grids. The development of this overall and integrated power pattern will lead to more complex grid stability characteristics and intensify the dynamic interaction between regional grids. [0003] In this context, whether the power grid can quickly control the load in emergencies or even failures, use the original lines to reasonably reorganize the partition power supply network, and then control the flow of related components and improve the reactive power and voltage support of the parti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/12
CPCH02J3/12
Inventor 汤奕陈倩石磊蔡明明
Owner SOUTHEAST UNIV
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