CN103065429B - Charging alarming method and alarming device of automatic throw-in equipment of emergency power supply - Google Patents

Abstract

The invention provides a charging alarming method and an alarming device of an automatic throw-in equipment of an emergency power supply. When the automatic throw-in equipment of the emergency power supply is charged, a charging mark is detected; when the charging mark cannot be detected, an automatic throw-in allowing mark is detected, if the automatic throw-in allowing mark is successfully detected, whether a first preset time is exceeded is judged, and if the first preset time is exceeded, an alarming signal is given out. The problem of hidden danger of the automatic throw-in equipment of the emergency power supply is solved, and reliability is improved.

Description

Charging alarm method and alarm device for standby self-injection device

【Technical field】

The invention relates to the technical field of electric power systems and automation thereof, in particular to a charging alarm method and alarm device for an automatic switching device.

【Background technique】

In the power system, the automatic switching device of the standby power supply (hereinafter referred to as the standby automatic switching device) is an indispensable automatic device. When the normal power supply loses power supply capacity due to failure, it will automatically and quickly switch the load to the backup power supply to maintain Continuous power supply to important users or substations.

After the charging conditions are satisfied, the bus voltage is detected. When the bus voltage drops within a certain period of time or the position of the switch on the side of the power supply line is in the position, and combined with the judgment that the main power supply line has no current and the backup power line has voltage, the backup power supply will be activated. The self-injection device operates, that is, jump off the power inlet switch first, and then close the standby power inlet switch after confirmation.

However, in actual operation, it is found that if the charging of the standby automatic switching device fails, or after the charging is successful, it will be discharged due to various reasons during the operation, and thereafter, the device will always fail to charge due to the circuit or other problems (in fact, The actual power grid meets the charging conditions), in this case, the device actually fails to work normally and cannot operate, and the operation and maintenance personnel cannot grasp the situation in time, which brings hidden dangers to the safe operation of the substation.

【Content of invention】

Aiming at the deficiencies of the existing technology of the automatic switching device, the present invention proposes a charging alarm method and device for the automatic switching device, which solves the hidden danger of charging the automatic switching device and improves reliability.

The charging alarm method of the self-switching device provided by the present invention includes the steps of:

When charging the standby self-injection device, detect the charging mark;

When the charging flag is not detected, detect the standby automatic switching function permission flag, if detected, judge whether the first predetermined time is exceeded, and send an alarm signal if the first predetermined time is exceeded.

The charging alarm device for the self-switching device provided by the present invention includes:

A detection device, configured to detect a charging flag when charging the standby automatic switching device; and detect the standby automatic switching function permission flag when the charging symbol is not detected;

The warning device is used for the detecting device to judge whether the first predetermined time is exceeded when the detection device detects the permission flag of the standby automatic switching function, and if the first predetermined time is exceeded, an alarm signal is sent.

In the prior art, the self-injection device of the backup device cannot work normally due to the constant charging failure, and the operation and maintenance personnel do not know that the device is invalid. After adopting the present invention, when the device fails to charge for a long time, an alarm signal will be sent to remind the operation and maintenance personnel to check and repair the device in time, so that the operation personnel can find the abnormality of the device in time, repair it early, and improve the reliability of power supply.

【Description of drawings】

Figure 1 is the substation wiring diagram;

Fig. 2 is a logical flow chart of the charging alarm method of the automatic switching device of the present invention;

Fig. 3 is a functional block diagram of a charging warning device with an automatic switching device according to the present invention.

【Detailed ways】

Fig. 1 has provided the schematic diagram that adopts existing typical substation wiring, and Fig. 2 is the logical block diagram of the charging condition of the standby self-switching device of a preferred embodiment of the present invention, takes the typical substation of Fig. 1 as an example, namely adopts a power line as The main power supply line and the other power line are backup power lines. If the power line A is used as the main power supply and the power line B is used as the backup, the charging conditions of the backup self-injection device are as follows:

The device detects the function permission flag, the two busbars have voltage and the busbar switch is in the closed position, the outlet switch of power line A is in the closed position, and the outlet switch of power line B is in the off position, and the voltage of the power line B line is under voltage. When the above-mentioned conditions are established, delay for a period of time, as an embodiment, for example, delay for 5 seconds, set the charging flag (in one embodiment, set the charging flag to 1), and prepare the self-injection device for charging (step 101).

When the self-injection device is charged, detect the charging sign (step 102), in one embodiment, the charging sign=1 can be used as the state of the charging sign; if the charging sign is detected, then delay the predetermined time earlier (For example, the predetermined time is 5s) (step 103), and then charge the self-injection device (step 104). When the charging flag is not detected, detect the standby self-switching function permission flag (step 105). In one embodiment, the standby self-switching function permission flag=1 can be used as the status of the charging flag. If detected, it is judged whether the first predetermined time is exceeded (step 106), and if the first predetermined time is exceeded, an alarm signal is sent (step 107). The length of the first predetermined time can be set to different values according to different requirements, for example, as an embodiment, the first predetermined time can be set to 30s.

As an embodiment, when the step 105 detects the standby automatic switching function permission flag, if there is no standby automatic switching function permission flag, the alarm is cancelled. As a further improvement to this embodiment, after the alarm signal is sent, if there is no standby automatic switching function permission flag, it can be further judged whether it exceeds the second predetermined time (step 108), if it exceeds the second predetermined time, then cancel the alarm ( Step 110). Similarly, the length of the second predetermined time may also be set to different values according to different requirements, for example, the second predetermined time is set to 5s.

As an embodiment, the condition for stopping the sending of the warning signal may also be to cancel the warning through manual intervention, and stop sending the warning signal after receiving a reset signal from the operator.

Corresponding to the above-mentioned charging warning method for the automatic switching device, the present invention also provides a charging warning device for the automatic switching device, including: a detection device and an alarming device. It works as follows:

The detection device detects the charging sign when charging the standby automatic switching device; when the charging mark is not detected, detects the standby automatic switching function permission sign; the detection device detects the standby automatic switching function permission sign When the detection device detects the alarm device It is judged whether the first predetermined time is exceeded, and if the first predetermined time is exceeded, an alarm signal is sent. As an embodiment, after the alarm signal is sent out, the alarm device can also detect whether the enabling flag of the standby automatic switching function exists, and cancel the alarm if it does not exist.

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (8)

1. A charging alarm method for an automatic switching device, characterized in that it comprises the steps of: When charging the automatic switching device, the charging sign is detected; the charging condition of the automatic switching device is: The device detects the function permission flag, the two busbars have voltage and the busbar switch is in the closed position, the outlet switch of the power line A is in the closed position, and the outlet switch of the power line B is in the off position, and the voltage of the power line B line is under voltage; When the above conditions are met, delay for a period of time, the charging flag is set, and the self-injection device is charged; among them, the power line A is the main power supply, and the power line B is the backup; When the charging sign is not detected, detect the standby automatic switching function permission sign, if the function permission sign is detected, then judge whether the first predetermined time is exceeded, and if the first predetermined time is exceeded, send an alarm signal. 2. The charging warning method of the automatic switching device according to claim 1, wherein the first predetermined time is 30s. 3. The charging alarm method of the standby automatic switching device according to claim 1, characterized in that, the steps further include: After the alarm signal is sent out, it is detected whether the standby auto-switching function permission flag exists, if not, it is judged whether the second predetermined time is exceeded, and if the second predetermined time is exceeded, the alarm is cancelled. 4. The charging warning method of the automatic switching device according to claim 3, wherein the second predetermined time is 5s. 5. The charging alarm method of the standby automatic switching device according to claim 1, characterized in that, the steps further include: After the alarm signal is sent, it is detected whether the permission flag of the standby automatic switching function exists, and if not, the alarm is cancelled. 6. The charging alarm method of the standby automatic switching device according to claim 1, characterized in that, the steps further include: After receiving the reset signal from the operator, stop sending the alarm signal. 7. A charging alarm device for automatic switching devices, characterized in that it includes: The detection device is used to detect the charging sign when charging the standby automatic switching device; and when the charging mark is not detected, detect the standby automatic switching function permission flag; the charging condition of the standby automatic switching device is: The device detects the function permission flag, the two busbars have voltage and the busbar switch is in the closed position, the outlet switch of the power line A is in the closed position, and the outlet switch of the power line B is in the off position, and the voltage of the power line B line is under voltage; When the above conditions are established, delay for a period of time, the charging flag is set, and the self-injection device is charged; wherein, the power line A is the main power supply, and the power line B is the backup; the alarm device is used for the detection device to detect the It is judged whether the first predetermined time is exceeded when the self-switching function permission flag is used, and if the first predetermined time is exceeded, an alarm signal is sent. 8. The charging warning device for automatic switch-on device according to claim 7, characterized in that, The alarm device is also used to detect whether the standby automatic switching function permission flag exists after the alarm signal is sent out, and cancel the alarm if it does not exist.