Operation method for safely applying line protection device to wind power station

Abstract

The invention discloses an operation method for safely applying a line protection device to a wind power station, which relates to the relay protection of a power plant and is provided aiming at solving the problem that the line protection device in the current system cannot meet the protective requirements of the wind power station very well. The operation method comprises the following steps of: firstly, establishing a real-time simulation model which is a virtual power grid environment, including fault points in a wind power station, a bus and transmission lines, a main transformer unit of a power generator, a current and voltage mutual inductor, an equivalent system and a simulation system; secondly; establishing an experimental detection platform including a real-time digital simulation work station, an RTDS (Real Time Digital System) real-time digital simulator, an analogue quantity output board card, a power amplifier, a line protection device, an analogue circuit breaker, a switch conversion device and a digital quantity input board card; and thirdly, accessing the line protection device to be detected to the power amplifier of the detection system, then connecting the line protection device with the analogue circuit breaker and carrying out various kinds of experiments. The experiment implemented by using the wind power station model and an onsite oscillograph of the wind power station can provide a real and accurate simulation environment so that validation possibility is improved, and therefore the line protection device to be detected can be safely used for the wind power station after detected.

Description

technical field [0001] The invention relates to the field of relay protection, in particular to a line protection device therein. Background technique [0002] The requirements of the international situation of environmental protection and low carbon have promoted the rapid growth of wind power installed capacity, and the proportion of the total installed capacity of the power grid has continued to increase. negative impact. Based on the analysis and research of several large-scale wind turbine off-grid accidents in a certain area, it is found that the fault characteristics of wind farms are different from traditional power sources, making the existing system protection devices not suitable for the protection needs of wind farms. On the other hand , After inquiring about other existing technical equipment, no data introduction for line protection devices that can be better used in wind farms has been found. Therefore, the present invention is to improve the existing system...

AI Technical Summary

Problems solved by technology

[0002] The requirements of the international situation of environmental protection and low carbon have promoted the rapid growth of wind power installed capacity, and the proportion of the total installed capacity of the power grid has continued to increase. negative impact

Based on the analysis and research of several large-scale wind turbine off-grid accidents in a certain area, it is found that the fault characteristics of wind farms are different from traditional power sources, making the existing system protection devices not suitable for the protection needs of wind farms. On the other hand , after inquiring about other existing technical equipment, we have not yet found any data introduction on the line protection device that can be better used in wind farms

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