CN213693126U - Abnormal self-starting device of relay protection device - Google Patents
Abnormal self-starting device of relay protection device Download PDFInfo
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- CN213693126U CN213693126U CN202022650072.4U CN202022650072U CN213693126U CN 213693126 U CN213693126 U CN 213693126U CN 202022650072 U CN202022650072 U CN 202022650072U CN 213693126 U CN213693126 U CN 213693126U
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Abstract
The utility model relates to a relay protection device control field specifically is an unusual self-starting drive of relay protection device. The technical problem that the power supply of the protection device can only be manually restarted after the power supply of the microcomputer protection device finds that the 'abnormal alarm' condition occurs at present is solved. An abnormal self-starting device of a relay protection device comprises a time relay, an intermediate relay and a resistor; the time relay comprises a main coil and a time relay normally-open contact, and the intermediate relay comprises a main coil, an intermediate relay normally-open node and an intermediate relay normally-closed contact; the main coil of the time relay is connected in series with a power supply circuit of a device power supply contact of the protection device and a device alarm node, the normally open contact of the time relay and the main coil of the intermediate relay are connected in series and then connected with two ends of the power supply circuit, and the normally open node of the intermediate relay and the resistor are connected in series and then connected with two ends of the power supply circuit; the normally closed contact of the intermediate relay is connected in series into a control loop of the protection device.
Description
Technical Field
The utility model relates to a relay protection device control field belongs to electric power system automation, specifically is an unusual self-starting device of relay protection device.
Background
The microcomputer relay protection device is composed of components such as a single chip microcomputer with high integration degree and no bus chip, a high-precision current and voltage transformer, a high-insulation-strength outlet intermediate relay, a high-reliability switching power supply module and the like. The device is an economical protection device for integrating measurement, control, protection and communication. In the daily operation of a power system, an abnormal alarm condition occurs in a relay protection device, although the occurrence probability of the abnormal alarm condition is very small, the subsequent result is very serious, and if the abnormal alarm condition is not found and processed in time, the condition that a transformer substation is subjected to gate-off exceeding occurs, so that the power failure range is directly expanded.
If this happens also in higher voltage class power systems and is not discovered and handled in a timely manner, it can lead to more serious power accidents, even regional blackouts. At present, once the condition of 'abnormal alarm of the device' is found, the power switch of the microcomputer protection device is disconnected and then sent again. However, a matching device capable of automatically realizing the function is not available at present, and manual operation is required. An operator usually has difficulty in knowing that the protection device is abnormal at the first time, and is also difficult to restart the protection device at the first time, so that the protection device is possibly in an abnormal working state for a long time, and the safety of the power system is influenced.
The general 110kV and below relay protection devices are provided with power supply alarm circuits and are provided with locking and alarm signals and corresponding contacts, specifically, a normally closed contact (device power supply contact) for a display device power supply and a normally open contact (device alarm contact) for abnormal alarm of the display device, which are arranged in the protection device, are connected in series into a 5V power supply, the device control power supply is normal, the device power supply contact is normally closed, and the device alarm contact is normally open; when the protection device is abnormal, the device alarm contact is closed and sends a signal, the device power contact is normally manually disconnected and then closed again, and the device alarm signal can be cancelled.
Disclosure of Invention
The utility model discloses a solve present computer protection device power discovery "device report an emergency and ask for help or increased vigilance" the condition take place the back, can only manually restart the technical problem of protection device power, provide a relay protection device unusual self-starting device.
The utility model discloses an adopt following technical scheme to realize: an abnormal self-starting device of a relay protection device comprises a time relay, an intermediate relay and a resistor; the time relay comprises a main coil and a time relay normally-open contact, and the intermediate relay comprises a main coil, an intermediate relay normally-open node and an intermediate relay normally-closed contact; the main coil of the time relay is connected in series with a power supply circuit of a device power supply contact of the protection device and a device alarm node, the normally open contact of the time relay and the main coil of the intermediate relay are connected in series and then connected with two ends of the power supply circuit, and the normally open node of the intermediate relay and the resistor are connected in series and then connected with two ends of the power supply circuit; the normally closed contact of the intermediate relay is connected in series into a control loop of the protection device.
When the protection device sends out a device abnormal alarm signal (the device alarm contact is closed), and under the normal condition of a device power supply, after ten minutes, the time relay SJ is started, the intermediate relay ZJ is electrified, and a normally closed node connected in series in a control power supply loop is disconnected, so that the control power supply is disconnected; when the protection control power supply is disconnected, the power-off normally closed node of the intermediate relay is closed, the power supply loop returns to be normal, the protection device returns to be normal in power supply, the relay protection is enabled to return to be in a normal operation state, and therefore one cycle is completed.
The device can effectively solve the problem that the protective function is out of the operating state under the condition of abnormal alarm of the relay protection device, and long-term application proves that the device has the characteristics of low cost, good use effect and normal operation of the relay protection device without powering off the relay protection device manually by operation and maintenance workers and then powering on the relay protection device; the real-time monitoring of the running state of the relay protection device can be realized, the abnormal situation in running, particularly the abnormal situation of the relay protection device can be found in time, the relay protection device is prevented from being incorrectly operated due to long-time abnormal work through the self-starting device, the problem of misjudgment and omission caused by judgment of the state of the device through manual inspection can also be avoided, and the running reliability of the relay protection device in the power system is effectively improved.
Drawings
Fig. 1 a schematic diagram of a control module according to the present invention.
Fig. 2 is a wiring diagram of a control circuit of the protection device (including normally closed contacts of an intermediate relay).
Detailed Description
An abnormal self-starting device of a relay protection device comprises a time relay, an intermediate relay and a resistor; the time relay comprises a main coil and a time relay normally-open contact, and the intermediate relay comprises a main coil, an intermediate relay normally-open node and an intermediate relay normally-closed contact; the main coil of the time relay is connected in series with a power supply circuit of a device power supply contact of the protection device and a device alarm node, the normally open contact of the time relay and the main coil of the intermediate relay are connected in series and then connected with two ends of the power supply circuit, and the normally open node of the intermediate relay and the resistor are connected in series and then connected with two ends of the power supply circuit; the normally closed contact of the intermediate relay is connected in series into a control loop of the protection device.
The normally open node of the intermediate relay and the resistor are also connected in series with an action indicator lamp.
The voltage of the power supply loop is 5V.
The device is powered by a 5-volt power supply and comprises an intermediate relay, a time relay, a resistor and an indicator light, and a power supply loop of the relay protection device needs to be accessed in practical application (namely, a normally closed node of the intermediate relay of the device is connected in series with a control power supply + KM-KM of the relay protection device).
When an abnormal alarm signal of the device is sent (the alarm contact of the device is closed), and under the normal condition of a power supply of the device, the time relay is started after ten minutes, the normally open node of the time relay in the figure 1 is closed, the main coil of the intermediate relay is electrified, the normally open node of the intermediate relay is closed, the indicator lamp is lightened to send a signal to display that the device is abnormal, and meanwhile, the normally closed node (ZJ in the figure 2) connected in series in a control power supply loop is disconnected, so that the control power supply of the protection device is disconnected; when the protection control power supply is disconnected, the power supply node of the device is disconnected, the main coil of the time relay loses power, the normally open contact of the time relay is disconnected, the normally closed node of the intermediate relay losing power is closed, the power supply loop returns to be normal, and the protection device returns to be normal in power supply (the alarm node of the device is disconnected, and the power supply node of the device is closed again), so that the relay protection returns to be in a normal operation state, and one cycle is completed. The device can effectively solve the problem that the protective function is out of operation under the condition of abnormal alarm of the relay protection device, and long-term application proves that the device has the characteristics of low cost, good use effect, no need of manual power-off and power-back of operation and maintenance workers and normal work of the relay protection device.
Claims (3)
1. An abnormal self-starting device of a relay protection device is characterized by comprising a time relay, an intermediate relay and a resistor; the time relay comprises a main coil and a time relay normally-open contact, and the intermediate relay comprises a main coil, an intermediate relay normally-open node and an intermediate relay normally-closed contact; the main coil of the time relay is connected in series with a power supply circuit of a device power supply contact of the protection device and a device alarm node, the normally open contact of the time relay and the main coil of the intermediate relay are connected in series and then connected with two ends of the power supply circuit, and the normally open node of the intermediate relay and the resistor are connected in series and then connected with two ends of the power supply circuit; the normally closed contact of the intermediate relay is connected in series into a control loop of the protection device.
2. The abnormal self-starting device of the relay protection device according to claim 1, wherein the normally open node of the intermediate relay and the resistor are further connected in series with an operation indicator lamp.
3. The abnormal self-starting device of claim 1, wherein the power supply loop voltage is 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022650072.4U CN213693126U (en) | 2020-11-17 | 2020-11-17 | Abnormal self-starting device of relay protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022650072.4U CN213693126U (en) | 2020-11-17 | 2020-11-17 | Abnormal self-starting device of relay protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213693126U true CN213693126U (en) | 2021-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022650072.4U Active CN213693126U (en) | 2020-11-17 | 2020-11-17 | Abnormal self-starting device of relay protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213693126U (en) |
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2020
- 2020-11-17 CN CN202022650072.4U patent/CN213693126U/en active Active
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