An optimized low-frequency load shedding method for enterprise isolated network operation based on goose network

Abstract

The invention discloses a GOOSE network-based method for optimizing low-frequency load reduction in enterprise isolated power system operation. The method includes a low-frequency load reduction device, a line protection measurement and control device, an equipment protection measurement and control device, various measurement and control devices and a rapid GOOSE communication network; the low-frequency load reduction device is mounted near a power supply bus, voltage and frequency of the power supply bus are collected, real-time power data of a line and equipment are obtained through the communication network, low-frequency load reduction logic judgment is made and a load reduction control command is sent out; the line protection measurement and control device and the equipment protection measurement and control device complete collection of voltage, current and related input signals of lines and equipment, fault logic judgment is made and a faulty line is cut off through a relay outlet, and power calculation measurement is performed at the same time; and the various measurement and control devices complete measurement of the voltage, current and input quantity of lines and equipment that are not equipped with protection measurement and control devices, and power calculation and relay outlet measurement and control are performed at the same time.

Description

technical field [0001] The invention belongs to the field of electric power automatic control. For enterprise users with self-provided power plants and isolated grid operation, a low-frequency load shedding method based on GOOSE network is proposed, the logic of low-frequency load shedding is optimized, and unimportant electrical equipment is cut off according to the priority level of load shedding from high to low, and Reduce the load shedding as much as possible, achieve fine control of low-frequency load shedding, and ensure the safe and stable operation of the power grid. Background technique [0002] With the continuous development of the economy, large-scale industrial and mining enterprises have also grown, and higher requirements have been placed on the diversity and reliability of power supply. Some large-scale enterprises such as cement, coal mines, chemical industry and other industries cannot realize the power supply of large power grid due to the requirements o...

AI Technical Summary

Problems solved by technology

However, the isolated grid operation of small power grids is characterized by large load switching or power failures, which will cause great disturbances and drastic changes in grid frequency, which will threaten the operation of the grid. heavy loss to the business

Low-frequency load shedding is an important line of defense to prevent power grid collapse, but the current load shedding method is to cut off the feeder switch on the bus, which cannot effectively manage the importance of the load and disperse the load hierarchically, and the amount of load shedding cannot be real-time. Measurement, it is possible to delay the system recovery time by cutting less bye, and it is also possible to cut power for important users due to multiple cuts

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