CN210016274U - Improvement device for high voltage power-off tripping system of DC control circuit breaker - Google Patents

Abstract

The utility model relates to a direct current control circuit breaker high voltage power failure tripping system improves device, it is the device that improves in the past large-scale distribution (transformer) station medium-high voltage electric power safety. The utility model discloses with the stand-by power supply of the electric energy of the current-reducing unit of current detection device as the trip system to drive trip coil makes trip mechanism action disconnection circuit breaker, the utility model discloses can be under the condition of trip loop power all incapability in the past, the trip isolation accident that opens circuit safely, safe and reliable just can strengthen its power supply quality.

Description

Improvement device for high voltage power-off tripping system of DC control circuit breaker

technical field

The utility model relates to an improvement device for a high-voltage power-off and tripping system of a DC-controlled circuit breaker, in particular to an improvement device for receiving (distributing) electricity in the past large-scale high-voltage power distribution (substation) stations, which is generally powered by a battery pack as the main control circuit. Substation, when there is a problem with the DC power supply system, there is a concern that the accident cannot be isolated when an accident occurs.

Background technique

In a large-scale high-voltage receiving (distribution) power station, for the stability of the power supply system, if the funds are sufficient and the space allows, the owner will choose the control power supply of the receiving (distribution) system to be assembled with a large battery pack battery as the power supply device. Generally speaking, a power supply system composed of battery packs is a more appropriate power supply method. For example, for high-voltage (above 36KV) supply and receiving (distribution) power stations of Taiwan Power Company (TPC), the control power supply mode of its circuit breakers is mainly DC supply, and generally uses battery packs to supply power to protect its power supply. (Distribution) the stability of the power supply system.

The high-voltage circuit breaker (H.V.CB) or UHV CGIS or GIS is to receive the instruction to protect the relay (Relay), as whether to trip the high-voltage circuit breaker and isolate the source of the accident. Therefore, if the circuit breaker fails to trip immediately in the event of a short-circuit accident in a business unit (the power receiver) as scheduled, it will cause damage to the high-voltage circuit breaker (H.V.CB), which will also affect the supply of power from the main power supply trunk to other Institutions (recipients), resulting in chain industrial losses. Whether the high-voltage circuit breaker can trip in time is controlled by whether the relay relay can issue commands in real time. Therefore, when there is a problem with the working power supply that provides the protection relay, the protection relay will not act; when the protection relay does not operate, the high-voltage CB will not operate when an accident occurs, and the accident of the institution cannot be isolated. point, causing serious secondary accidents, and even affecting the power supply feeder tripping! Can not be careless. Because of this high-risk industrial safety incident, accidents are often caused by misjudgment, so the power supply main line operators (such as China Taiwan Power Company) to prevent the electric relay from being unable to operate due to voltage dips in the event of a short-circuit accident and triggering the circuit breaker to trip. And due to the sluggish action of the current device, it is required that the public institution must set up a protection system in accordance with the regulations before allowing the power supply. The main provisions are: when the secondary side power supply of the voltage comparator is used, it should be supplemented by a capacitor trip device (CTD) or a capacitor trip device and then connected to an uninterruptible power supply system (UPS) in parallel, and the electronic or digital power supply should be used. The capacitor trip device (CTD) used in the electric relay should not be used for circuit breakers or other equipment. This is ideal, but accidents often come from ideal conditions. In practice, uninterruptible power systems (UPS) will almost fail due to battery aging after one or two years. If a battery-based DC power supply system is used, the battery may fail after one year, but the business unit will not notice it. Usually, when there is a short-circuit accident, it is found that the high-voltage circuit breaker (H.V.CB) will not trip. , it is found that the DC working power supply without the trip circuit cannot supply the working power to the protection relay (Relay), but it is too late.

In view of the above factors, when the DC power supply of the battery pack is disabled, if an accident occurs in the system during this period (regardless of any accident), such as CO, LCO, UV, OV, etc., the isolation of the accident point. The circuit breaker will cause the failure of the working power supply (DC power supply of the battery pack) supplying the trip circuit, which will cause the high-voltage panel (also known as the power distribution cabinet) to fail. When the system fails, the trip circuit has no working power and cannot isolate the accident. serious situation.

In the existing system with a DC battery pack as the control power supply, there can be a single DC battery pack to provide the DC power supply or two sets of DC battery packs to support each other to provide the DC power supply, as the DC power supply for the overall power distribution system. In the actual switchboard, in the trip circuit of the protection relay and the circuit breaker, the working power of the protection relay is generally both AC and DC to provide the required working power. Under normal circumstances, the DC power supply will be the priority (only one of AC and DC can be selected), because the DC power supply is generally more stable and reliable, so the DC power supply system based on battery packs is generally used for customers. Favorite option, where venue and economy allow.

In the actual state, it is the characteristics of the battery pack itself. It will be worn out and aged in one to two years, and there is a fear of incapacitation. Even some unpredictable conditions may occur in the entire control circuit. When the working power supply of the tripping loop is disabled, it is like using the AC source as the working power supply of the tripping control loop; in order to prevent accidents, due to the voltage sag, if the DC power supply fails again, it may occur. Failure to actuate the protective relay will cause an accident to occur. In order to prevent the above situation from happening, a control loop that can provide DC power is developed to avoid accidents that may occur when the power is disabled, and the improvement device for the high-voltage power-off tripping system of the DC-controlled circuit breaker is a method that can solve the above problems. .

The applicant of this creation has proposed several proposals and applied for patents for the improvement of the working power supply of the tripping circuit in the high-voltage power distribution board in the high-voltage power distribution system. Especially in the improvement of the capacitor tripping device CTD, it can be tested under load, and there is an electric meter to display its voltage value, to the panel type, which can effectively prevent the prevention of industrial safety accidents that may be caused by turning on the high-voltage switchboard, and has a voltage comparison circuit. And the capacitor tripping device of the alarm circuit can solve the problem that the capacitor will decay due to time. There is a combination of the time circuit and the voltage comparison circuit, which can be used daily or set the time to simulate whether the trip circuit working power is sufficient when an accident occurs. Push its load equipment to isolate the accident, further have CTD of automatic power conversion circuit to prevent the failure of the capacitor tripping device, the external power supply has the support of AC and DC power supply, and can solve the problems of voltage and capacitance and communication, and DC The DC capacitor tripping device is used to control the tripping of the circuit breaker. The above solutions are the products in the current market.

To sum up, when the control circuit based on DC power supply or AC power supply is used for the tripping circuit of the high voltage panel to fail, the actual situation faced in the field cannot effectively solve this problem in the past. Therefore, from the actual needs of the situation in the field, the improvement device for the high-voltage power-off and tripping system of the DC-controlled circuit breaker can solve the above-mentioned problems, and at the same time improve the safety and stability of the power distribution system.

Utility model content

Purpose

The utility model provides an improved device for a high-voltage power-off tripping system of a DC-controlled circuit breaker, which can effectively solve the accident in the market because the DC power source is mainly used as the working power source of the tripping circuit. Generally, the battery pack is used as the main energy storage method, and there is only a single protection. Therefore, the DC control circuit breaker high-voltage power-off tripping system improvement device of the present invention can be installed in the control circuit mainly based on DC power supply. In the case of changing the protection coordination set by the original system protection relay, without changing the structure of the original switchboard and the state of the high-voltage circuit breaker that has been finalized and tested, the secondary side of the voltage comparator PT in the original power system is changed. The voltage source and the current source on the secondary side of the CT of the current transformer are connected in series with the normally open contact of the protection relay, and then the trip coil of the circuit breaker is connected in series to connect the internal trip mechanism to disconnect the circuit breaker. Improve past problems.

technical solutions to problems

In order to achieve the above purpose, the present invention provides an improved device for a high-voltage power-off tripping system of a DC-controlled circuit breaker, which is electrically connected to a power circuit. The power circuit has at least one trip coil for disconnecting the circuit breaker of the power circuit, so as to link the trip mechanism of the circuit breaker to disconnect the circuit breaker. The improved device for the high-voltage power-off tripping system of the DC control circuit breaker of the present invention includes: a voltage detection device arranged on the power circuit, and the voltage detection device can optionally include a step-down device for reducing the output voltage when necessary. unit; a current detection device disposed on the power circuit, the current detection device including a current-reducing unit for reducing the output current; a protection relay set on the power circuit, the protection relay according to the power system Line status, set at least one protection electrical safety setting value, such as current, grounding, voltage, frequency, temperature and other values, when the detection device value is greater than the electrical safety setting value, the protection relay is normally open Contact action is turned on. The above-mentioned utility model also includes: a trip circuit power supply circuit, which is electrically connected to at least the DC system power supply, the current drop unit of the current detection device, and the step down unit of the voltage detection device (adding when necessary) Or an external support power supply; an automatic power supply alternating circuit is also provided, and the automatic power supply alternating circuit is electrically connected to the trip circuit power supply circuit. ; Furthermore, a capacitor energy storage circuit is provided, which is electrically connected to the trip circuit power supply circuit to store appropriate DC power. The utility model sets the circuit according to the power circuit system line, the load state, the requirements of system protection coordination and the protection of sequence control. The aforesaid protection setting circuit actuates the conducting contact, and can be connected in parallel with the remote intelligent forced power-off command contact according to the requirements. The present invention is further provided with a sensing device connecting unit, the sensing device connecting unit at least includes two or more sensing devices of current detection device and voltage detection device; an external equipment device connecting unit, the external equipment device connecting unit The utility model includes at least a normally open contact of the protection relay, both ends of the trip coil of the circuit breaker or a remote intelligent forced power-off command contact; a contact state display unit, the contact state display unit can display the state of the system trip circuit; the utility model The DC control circuit breaker high voltage power failure tripping system improvement device can provide tripping driving power through the power automatic alternating circuit according to the DC power source, voltage source power, current source power or external power, and then connect in series to protect the normally open contact of the relay. Or the normally open contact of the protection relay is connected in parallel with the remote intelligent forced power-off command contact, and the auxiliary contact of the circuit breaker is connected in series, and then the trip coil of the circuit breaker is connected in series to form a trip circuit system. When the normally open contact of the protection relay or the remote intelligent forced power-off command contact is turned on, and the auxiliary contact of the circuit breaker connected in series is actuated and turned on, the trip coil of the circuit breaker is connected to the power circuit of the trip circuit. The electric energy of the electric energy or the downflow unit of the current detection device is actuated to drive the tripping mechanism of the circuit breaker to disconnect the circuit breaker.

In order to achieve the above object, the present invention also provides an improved device for the high-voltage power-off tripping system of a DC-controlled circuit breaker similar to the aforementioned one, which is electrically connected to a power circuit. The power circuit has a trip coil for disconnecting the circuit breaker of the power circuit, so as to link the trip mechanism of the circuit breaker to disconnect the circuit breaker. The improved device for the high-voltage power-off tripping system of the DC control circuit breaker includes: a voltage detection device disposed on the power circuit, the voltage detection device including a step-down unit for reducing the output voltage when necessary; a voltage detection device disposed on the power circuit The current detection device on the power circuit, the current detection device includes a current reduction unit for reducing the output current; a protection relay set on the power circuit, the protection relay is set according to the state of the power system line At least one protection electrical safety setting value, such as current, grounding, voltage, frequency, temperature, etc., when the detection device value is greater than the electrical safety setting value, the protection relay normally open contact is actuated and turned on; A trip circuit power supply circuit is electrically connected to the DC system power supply, the current step-down unit of the current detection device, the step-down unit of the voltage detection device or an external support power supply; an AC-DC conversion circuit, the AC-DC conversion circuit is electrically connected to the The step-down unit of the voltage detection device, or the external AC power, is used to convert the AC power into DC power, and the DC power is electrically connected to the capacitor storage by the capacitor energy storage; a power supply automatic alternating circuit is electrically connected to the trip circuit The power supply circuit, the power supply automatic alternation circuit outputs the appropriate electric energy as the electric energy for the tripping circuit to drive the tripping coil of the circuit breaker; and is electrically connected to the tripping circuit power supply circuit with a capacitor energy storage circuit to store the appropriate direct current electric energy. The circuit is set according to the requirements of the power circuit system line, load status and system protection coordination and the protection of the sequence control. The protection setting circuit actuation conduction contact can be connected in parallel with the remote intelligent forced power-off command contact according to the demand. The aforementioned improvement device for the high-voltage power-off tripping system of the DC control circuit breaker further includes: a sensing device connecting unit, the sensing device connecting unit at least includes two or more sensing devices of a current detection device and a voltage detection device; an external The equipment connection unit at least includes a normally open contact of the protection relay, both ends of the trip coil of the circuit breaker or a remote intelligent forced power-off command contact; and a contact state display unit, which can display the state of the system trip circuit. The improved device for the high-voltage power-off tripping system of the DC control circuit breaker of the utility model can be based on the DC power source, voltage source power, current source power or external power source as the power source, and the tripping drive power is provided by the power supply automatic alternating circuit and then connected in series for protection. The normally open contact of the relay, or the normally open contact of the protection relay is connected in parallel with the remote intelligent forced power-off command contact, and the closed auxiliary contact of the circuit breaker is connected in series, and then the trip coil of the circuit breaker is connected in series to form a trip circuit system. When the normally open contact of the protection relay or the remote intelligent forced power-off command contact is turned on, and the auxiliary contact of the circuit breaker is turned on, the trip coil of the circuit breaker is detected by the electric energy or current of the power circuit of the trip circuit. The electric energy of the down-current unit of the measuring device is actuated to drive the tripping mechanism of the circuit breaker to open the circuit breaker.

Description of drawings

FIG. 1 is a schematic diagram of the wiring of the improved device for the high-voltage power-off and tripping system of the DC control circuit breaker of the present invention.

FIG. 2 is a schematic diagram of a current detection device (current comparator).

3 is a schematic diagram of the trip circuit action of the improved device for the high-voltage power-off tripping system of the DC control circuit breaker of the present invention.

FIG. 4 is a schematic structural diagram of an improved device for a high-voltage power-off tripping system of a DC-controlled circuit breaker according to the present invention.

Description of symbols in the attached drawings:

1 DC control circuit breaker high voltage power-off tripping system improvement device; 10 circuit breaker; 11 current detection device; 12 voltage detection device; 13 trip mechanism; 14 circuit breaker closing auxiliary contact; 15 trip coil; 16 protection circuit Station normally open contact; 17 Remote intelligent forced power-off command contact; 18 Trip circuit power supply circuit; 19 Protection relay; 20 Power supply automatic alternate circuit; 21 Sensing device connection unit; 22 External equipment device connection unit; 23 Contact status display unit; 24 battery unit; 28 control loop power supply; 181 first detection circuit; 182 first display unit; 183 analog fault occurrence circuit; 184 AC/DC conversion circuit; 185 DC power alternate circuit; 186 second detection circuit; 187 The second display unit; 188, 189 switch B contacts; 190 capacitor energy storage circuit; 191 DC power parallel output circuit; 192 third detection circuit; 193 third display unit.

Detailed ways

As shown in FIG. 1 , a preferred embodiment of the improved device for the high-voltage power-off tripping system of the DC control circuit breaker of the present invention is provided with a circuit breaker 10 on the power circuit, and the circuit breaker 10 is provided with a trip coil 15 , the trip coil 15 is linked to the trip mechanism 13 of the circuit breaker 10; a voltage detection device 12 (such as a voltage comparator) is provided on the power circuit, and the voltage detection device 12 includes a voltage drop for reducing the output voltage Voltage unit; the step-down unit is electrically connected to the protection relay 19 and the control loop power supply 28 . The power loop is also provided with a current detection device 11 (such as a current converter), the current detection device 11 includes a current reduction unit for reducing the output current; the current reduction unit is electrically connected to the protection relay 19 and the control The loop power supply 28 , the control loop power supply 28 selects the corresponding power through the power supply automatic alternation circuit 20 and is connected to the protection relay 19 in series to connect the normally open contact 16 of the protection relay. The protection relay 19 sets its protection electrical safety setting value according to the power system line, load status and protection coordination requirements. When the protection setting value is reached, the normally open contact 16 of the protection relay is actuated and turned on, and can be connected with The remote intelligent forced power-off command contact 17 is connected, the circuit breaker closing auxiliary contact 14 is connected in series, and the trip coil 15 of the circuit breaker 10 is connected in series to form a trip circuit system. In this way, the electric energy of the current detection device 11 (such as a current comparator) and the electric energy of the voltage detection device 12 (such as a voltage comparator) can be introduced to further improve the trip coil 15 of the circuit breaker 10 when an accident occurs. There is enough power to drive to isolate the accident.

Please refer to FIG. 2 for further explanation of the principle of the present invention. A block diagram of FIG. 2 is a schematic diagram of a general current detection device (current comparator). The current of the current-reducing unit of the current detection device 11 flows through an ammeter to form a complete loop. In order to further introduce the current of the current detection device 11 (such as a current transformer) as the power source of the trip coil 15 of the circuit breaker 10 , the present invention connects a side branch path in parallel with the current drop unit of the current detection device 11 . When this side branch path is normal, the protection relay 19 does not operate and the normally open contact 16 of the protection relay inside is open, and the circuit breaker closed auxiliary contact 14 of the circuit breaker 10 is in a conducting state, and there is no current at this time. Flow through the side branch path. However, when the power system fails, the protection relay 19 acts, the normally open contact 16 of the protection relay is turned on and the circuit breaker closed auxiliary contact 14 is also turned on, and the side branch path constitutes a complete circuit conduction state, and the current detection device 11 The current of the down-current unit (such as a current transformer) passes through the side branch path, so it can be used as the electric power required by the circuit breaker 10 to trip the coil 15 .

Please refer to FIG. 3 to combine the technical features of the side branch path of the current detecting device 11 (eg, the current comparator) with the design of the current circuit breaker tripping power supply. The upper left block of FIG. 3 shows that the battery unit 24 is used as the trip power source of the trip coil 15 of the circuit breaker 10 in the used DC system capacitor trip device, which is usually sufficient to provide the trip of the circuit breaker 10 under normal circumstances. The drive power required for the coil 15. However, when the battery unit 24 is disabled due to human negligence, natural disasters, or overdue, it will not be able to drive the trip coil 15 to isolate the accident, which will cause great harm. If the aforementioned technical features of the current source of the down-current unit introduced into the current detection device 11 (such as a current comparator) are integrated, it can be seen from FIG. When the battery unit 24 is disabled, the current of the power circuit continues to pass through the circuit breaker 10, so the current source of the current-reducing unit of the current detection device 11 (such as a current transformer) continues to have current flowing (refer to FIG. 2 ). Show). At this time, the power supply automatic alternation circuit 20 switches to the circuit of the current detection device 11 due to the failure of the battery unit 24 of the used technology, and the current flows into the trip coil 15 of the circuit breaker 10 as indicated by the dotted arrow to drive the trip coil 15 of the circuit breaker 10. The tripping mechanism 13 is activated, so that the closed main contact of the circuit breaker 10 can be cut off to isolate the accident point, further improving the stability of the tripping circuit system of the circuit breaker, and ensuring the safety of the power system operation.

According to the aforementioned principles, a preferred embodiment of the improved device for the high-voltage power-off and tripping system of the DC-controlled circuit breaker of the present invention is a functional block diagram as shown in FIG. The DC input terminal of 24 is connected to the AC input terminal of the step-down unit of the voltage detection device 12 . The battery unit 24 serves as the power source required for the operation of the circuit breaker trip circuit. In addition, the step-down unit of the voltage detection device 12 is connected to the AC input terminal, and is converted into a DC power supply through an AC-DC conversion circuit 184. The AC-DC conversion circuit 184 is generally a bridge rectifier filter. The converted DC power supply can be used as a The power required by the circuit, or the power output from the battery unit 24, is connected to the DC power alternate circuit 185 at the same time. The DC power alternate circuit 185, when the step-down unit of the voltage detection device 12 is powered, is preferably used. The DC power output of the DC conversion circuit 184 charges the capacitor energy storage circuit 190 and utilizes the capacitor to store the electric energy required for tripping the circuit. If the step-down unit of the voltage detection device 12 is disabled, the DC power supply alternate circuit 185 selects the power supply of the battery unit 24 to charge the capacitor energy storage circuit 190 . The DC power alternating circuit 185 can usually be achieved by using a 2A2B1C relay module or a switching module with the same function (not shown). The output power of the DC power supply alternation circuit 185 (ie, the output power of the capacitor energy storage circuit 190 ) and the power supply of the battery unit 24 are simultaneously input to the DC power supply parallel output circuit 191 . The electrical energy is used as a priority to provide the power required to trip the circuit. The parallel output circuit 191 of the DC power supply can usually be achieved by using a 2A2B1C relay module or a switching module with the same function (not shown). In order to facilitate checking the status of the trip circuit power supply circuit 18, the outputs of the battery unit 24, the capacitor energy storage circuit 190, and the DC power parallel output circuit 191 can be connected to the detection circuit and the display unit, such as the meter head and the seven-segment display, respectively. or other LCD panel (not shown). The detection circuit is provided with a voltage comparison circuit for judging whether the voltage is higher than a default value for necessary warning.

In the schematic diagram of the current detection device shown in FIG. 2 , the side branch path and the output of the DC power parallel output circuit 191 are connected to the power supply automatic alternation circuit 20 . When the power supply of the power supply, the DC power supply parallel output circuit 191 fails, it switches to the side branch path of the current-reducing unit of the current detection device 11. At this time, the normally open contact 16 of the protection relay is turned on, and the auxiliary contact 14 of the circuit breaker is closed. When turned on, the current of the current drop unit of the current detection device 11 flows through the side branch path to drive the trip coil 15 to actuate the trip mechanism 13 to isolate the accident point. Similarly, the automatic power supply alternation circuit 20 can usually be achieved by using a 2A2B1C relay module or a switching module with the same function (not shown). The simulated fault occurrence circuit 183 in FIG. 4 is used for convenient testing of the working state of the trip circuit power supply circuit 18 . In addition, the remote intelligent forced power-off command contact 17 can accept external commands from a remote location for remote control of the trip coil 15 of the circuit breaker 10. For example, the remote control can be performed through a serial communication module (such as RS485, RS422 or RS232 and other communication ports) To achieve this, the serial communication module is preferably combined with the microcontroller interface to perform the transmission and reception of signals or control commands.

To sum up, the improved device for the high-voltage power-off tripping system of the DC control circuit breaker of the present invention introduces the electric energy of the current-reducing unit of the current detection device as the backup power supply of the tripping system, so as to drive the tripping coil to make the tripping mechanism act. When the circuit breaker is disconnected, it can safely trip the circuit breaker and isolate the accident when the power supply of the previous trip circuit is disabled, which is safe and reliable and can enhance the quality of its power supply. The utility model further improves the stability of the circuit breaker tripping circuit system and has deep industrial applicability.

What is disclosed in this utility model is only a preferred embodiment of the present utility model, which cannot limit the scope of the present utility model's rights. All equivalent changes or modifications made in accordance with the spirit of the present utility model are still covered by the present utility model. within the scope of the patent application.

Claims (6)

1. An improved device for a high-voltage power-off tripping system of a DC-controlled circuit breaker, which is electrically connected to a power circuit, and the power circuit has at least one trip coil for disconnecting the circuit breaker of the power circuit, so as to be linked The tripping mechanism of the circuit breaker disconnects the circuit breaker; it is characterized in that, the improvement device for the high-voltage power-off tripping system of the DC control circuit breaker includes: a current detection device disposed on the power loop, the current detection device comprising a current-reducing unit for reducing the output current; A protection relay set on the power circuit, the protection relay sets its protection electrical safety setting value according to the line state of the power system, when the detection device value is greater than the electrical safety setting value, the protection relay The post action is turned on; a trip loop power supply circuit, the trip loop power circuit is electrically connected to at least a DC system power supply, a current drop unit of the current detection device or an external support power supply; a power supply automatic alternation circuit, the power supply automatic alternation circuit is electrically connected to the trip circuit power supply circuit, and the power supply automatic alternation circuit outputs the appropriate electric energy as the electric energy of the trip circuit driving the trip coil of the circuit breaker; a capacitor energy storage circuit, the capacitor energy storage circuit is electrically connected to the trip circuit power supply circuit to store proper DC power; a sensing device connecting unit, the sensing device connecting unit at least includes the sensing device of the current detecting device; an external equipment device connecting unit, the external equipment device connecting unit at least includes a normally open contact of the protection relay, both ends of the trip coil of the circuit breaker or an external forced command conduction contact; a contact state display unit, the contact state display unit displays the state of the system tripping circuit; The high-voltage power-off tripping system improvement device of the DC-controlled circuit breaker provides tripping driving power through the power supply automatic alternating circuit according to the DC power source electric energy, current source electric energy or external electric energy, and then the protection relay is connected in series, or the protection relay is connected in series. Connect the remote intelligent forced power-off command contact, and then connect the trip coil of the circuit breaker in series to form a trip circuit system, the protection relay or the remote intelligent forced power-off command contact is turned on, and when the circuit breaker is closed, the auxiliary contact acts as a circuit breaker. When electrically conducting, the trip coil of the circuit breaker is actuated by the electric energy of the trip circuit power circuit or the electric energy of the current detection device to drive the trip mechanism of the circuit breaker to disconnect the circuit breaker. 2. The device for improving the high-voltage power-off tripping system of a DC control circuit breaker according to claim 1, wherein the protection relay is based on the power system line, load status and protection coordination requirements, and the protection relay is The electrical safety setting value is set according to at least one of current, grounding, voltage, frequency, and temperature. 3 . The improvement device for the high-voltage power-off tripping system of a DC control circuit breaker as claimed in claim 1 , wherein when the value of the detection device is greater than the electrical safety setting value, the normally open contact of the protection relay is enabled. 4 . Actuation is turned on. 4. An improved device for a high-voltage power-off tripping system of a DC-controlled circuit breaker, which is electrically connected to a power circuit, and the power circuit has at least one trip coil for disconnecting the circuit breaker of the power circuit to connect The tripping mechanism of the circuit breaker is activated to disconnect the circuit breaker; it is characterized in that, the improvement device for the high-voltage power-off tripping system of the DC control circuit breaker includes: a current detection device disposed on the power loop, the current detection device comprising a current-reducing unit for reducing the output current; A protection relay set on the power circuit, the protection relay sets its protection electrical safety setting value according to the line state of the power system, when the detection device value is greater than the electrical safety setting value, the protection relay The relay normally open contact is actuated and turned on; a trip loop power supply circuit, the trip loop power circuit is electrically connected to at least a DC system power supply, a current drop unit of the current detection device or an external support power supply; an AC-DC conversion circuit, the AC-DC conversion circuit is electrically connected to an external AC power to convert the AC power to DC power, and the capacitor energy storage is used to electrically connect the DC power to the capacitor energy storage; a power supply automatic alternation circuit, the power supply automatic alternation circuit is electrically connected to the trip circuit power supply circuit, and the power supply automatic alternation circuit outputs the appropriate electric energy as the electric energy for the trip circuit to drive the trip coil of the circuit breaker; a capacitor energy storage circuit, the capacitor energy storage circuit is electrically connected to the trip circuit power supply circuit to store proper DC power; a sensing device connecting unit, the sensing device connecting unit at least includes the sensing device of the current detecting device; an external equipment device connection unit, the external equipment device connection unit at least comprises a normally open contact of a protection relay, both ends of the trip coil of the circuit breaker or a remote intelligent forced power-off command contact; a contact state display unit, the contact state display unit displays the state of the system tripping circuit; The high-voltage power-off tripping system improvement device of the DC control circuit breaker is based on the DC power source, voltage source power, current source power or external power capacitor as the power source, and the tripping driving power is provided by the power supply automatic alternating circuit and then the protection power is connected in series. The relay, or the protection relay, is connected in parallel with the remote intelligent forced power-off command contact, and then the trip coil of the circuit breaker is connected in series to form a trip circuit system, and the protection relay or the remote intelligent forced power-off command contact is turned on. When the circuit breaker closes the auxiliary contact and turns on, the trip coil of the circuit breaker is actuated by the control circuit power supply or the electric energy of the current detection device to drive the trip mechanism of the circuit breaker to open the circuit breaker device. 5 . The improvement device for a high-voltage power-off tripping system of a DC control circuit breaker as claimed in claim 4 , wherein the protection relay is based on the power system line, load state and protection coordination requirements, and the protection of the protection relay is 5. 5 . The electrical safety setting value is set according to at least one of current, grounding, voltage, frequency, and temperature. 6 . The improvement device for the high-voltage power-off tripping system of a DC control circuit breaker as claimed in claim 4 , wherein when the value of the detection device is greater than the electrical safety setting value, the normally open contact of the protection relay is made to operate Active conduction.

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