Method for implementing credible locking of major-minor carrying apparatus of stabilization control device

Abstract

The invention discloses a method for stably controlling the reliable locking of a main transmission device and an auxiliary transmission device. If the main transmission device is judged to need tripping, whether the mark showing that the auxiliary transmission device can actuate is received or not is no longer judged, that is, the mark showing that the auxiliary transmission device can actuate is not sent to the auxiliary transmission device, thereby ensuring that only the main transmission device actuates, the auxiliary transmission device can be reliably locked, and other logic main and auxiliary transmission devices are similar to the main transmission device and the auxiliary transmission device under the condition that the main transmission device needs tripping is prior to receiving the mark showing that the auxiliary transmission device can actuate is judged. By adopting the method, since a matching relation that the main transmission device and the auxiliary transmission device can respond to each other is established, the exit of only one out of the main transmission device and the auxiliary transmission device actuates to ensure the reliable locking of the main transmission device and the auxiliary transmission device, and further avoid the time delay of the original auxiliary transmission device, thereby greatly improving the transient stability of the system.

Description

technical field [0001] The invention belongs to the technical field of electric engineering, and more precisely, the invention relates to a method for realizing reliable locking of a main and auxiliary transportation device of a stability control device. Background technique [0002] At present, the main and auxiliary transportation devices of the stability control device generally adopt the following method: figure 1 system connections shown. The main and auxiliary transportation devices cut off the outlets of the same object and connect them together. Any set of devices can cut off a certain unit, and the unit can be cut off. [0003] The main transport device and the auxiliary transport device are the same in function. When the device operates, only one of the main transport device or the auxiliary transport device is allowed to operate. The main difference is that the auxiliary transport device can only be operated when the main transport device is faulty. down to move...

AI Technical Summary

Problems solved by technology

Suppose the time difference between the action of the main transport and the auxiliary transport device is t1, and the time required for the exit coil to jump completely is t2. If t1>t2, the device that moves first must be able to move at the real exit; if t1>t, the device that acts first The locking signal of the other device cannot be locked, and the device that moves later will also act at the exit, which may cause malfunction. If t1

Although the probability of such accidents is very low, power grid failures often occur in small probability events and cause major losses

[0007] Similarly, when judging the high-cycle failure of the power grid, the frequency is only updated every 20ms. In addition to the sampling error, it is also very likely that the auxiliary operation first meets the high-cycle condition, and then the main operation meets the high-cycle condition, resulting in mutual blocking.

In addition, when the power plant receives a remote order to cut off the machine, due to communication channels and other reasons, there may be a big difference in the time when the main and auxiliary transportation devices receive the machine cut-off command

If the time when the auxiliary transport receives the order in advance falls within the interval (T-t, T+t), it may also cause the main and auxiliary transport to fail to block

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