Method for calculating low-voltage load shedding amount based on maximum self-starting capacity of node motor

Abstract

The invention provides a method for calculating a low-voltage load shedding amount based on a maximum self-starting capacity of a node motor, comprising steps of S1, calculating the maximum self-starting capacities of the node motor corresponding to different self-starting initial speeds; S2, determining the self-starting initial speed of the node motor in each load shedding round according to theset total number of load shedding rounds; S3, calculating the load shedding amount in each load shedding round based on the maximum self-starting capacity corresponding to the self-starting initial speed of the node motor in each load shedding round. The method for calculating the low-voltage load shedding amount based on the maximum self-starting capacity of the node motor, when the distributionnetwork voltage is unstable, determines the total number of load shedding rounds according to the requirement of the nodes in the distribution network for the load shedding accuracy, determines the self-starting initial speed of the node motor in each load shedding round according to the total number of load shedding rounds, and then calculates the load shedding amount in each round, thereby achieving a beneficial effect of obtaining the voltage stability of the power distribution system with the minimum load shedding amount.

Description

technical field [0001] The invention relates to the technical field of power system operation and control, in particular to a calculation method for low-voltage load shedding based on the maximum self-starting capacity of a node motor. Background technique [0002] As an important part of the third line of defense for power system security and stability, low-voltage load shedding is the most direct and effective control method to prevent system voltage collapse. At present, the widely used low-voltage load shedding scheme is to implement multiple rounds of load shedding, that is, the voltage Multiple rounds of load shedding are implemented when the set voltage gate threshold meets the extended time. Generally, the number of load shedding rounds is 2-5 rounds. The determination of the amount of load shedding for each round is partly determined by the experience of engineering personnel, and partly based on the "fuzzy "Theory", "sensitivity analysis" and other static analysis ...

AI Technical Summary

Problems solved by technology

[0002] As an important part of the third line of defense for power system security and stability, low-voltage load shedding is the most direct and effective control method to prevent system voltage collapse. At present, the widely used low-voltage load shedding scheme is to implement multiple rounds of load shedding, that is, the voltage Multiple rounds of load shedding are implemented when the set voltage gate threshold meets the extended time. Generally, the number of load shedding rounds is 2-5 rounds. The determination of the amount of load shedding for each round is partly determined by the experience of engineering personnel, and partly based on the "fuzzy "Theory", "sensitivity analysis" and other static analysis methods to calculate the load reduction; relying on the experience of engineers to determine the load reduction has extremely high professional requirements for engineers and has strong subjectivity, which cannot be popularized and applied. "Fuzzy theory" , "sensitivity analysis" and other methods are static analysis methods, which cannot accurately calculate the load shedding amount according to the real-time load of the distribution network

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