Automatic circuit breaker power supply system and execution method thereof

Abstract

The invention discloses an automatic circuit breaker power supply system and an execution method thereof, and the system comprises a dual-power switcher which receives the AC input of a PT, and electrically connects an intermediate relay to other loads; the inverter circuit board is electrically connected with the storage battery pack to other loads; and the dual-power switcher is electrically connected with the inverter circuit board through a power module. In normal, the PT outputs alternating current to a required load; when power is cut off, the power supply system is switched, and the storage battery pack supplies power to the load through the inverter circuit board. The state of the power supply system is judged and controlled through the intermediate relay. The problem of replacement of a power distribution automation old controller is solved, and the feasibility of distribution network planning is improved. Reliable operation of power distribution automation equipment is improved, and based on the secondary wiring principle, the problem that a new control box is compatible with an old circuit breaker is solved.

Description

Technical Field

[0001] The present invention relates to the field of fire safety, and in particular to an automatic circuit breaker power supply system and an execution method thereof. Background Art

[0002] At present, the service life of the primary equipment (circuit breakers, voltage transformers) of the 10kV pole-mounted switch automation equipment in the distribution network is generally 15 years, while the service life of the controller is generally 6 years. When the old controller fails or its functions cannot meet the needs, the entire set of equipment needs to be replaced, which costs a lot and causes power outage time.

[0003] Many old automation equipment have circuit breaker operating voltage of AC220V and energy storage circuit of AC220V, but the rated voltage of circuit breaker operating mechanism of automation equipment is now uniformly DC24V. Due to different parameter standards, new controllers from other manufacturers cannot be compatible with circuit breakers of old automation equipment. Therefore, it is necessary to independently adjust the power supply system module to provide a backup power source for the circuit breaker, and a reasonable and safe operation execution method is required to match the compatible system. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the invention of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the fact that many old automation complete sets of equipment in the above-mentioned and / or prior art have circuit breaker operating voltages of AC220V and energy storage circuits of AC220V, and that the rated voltage of the circuit breaker operating mechanisms of the automation complete sets is now uniformly stipulated to be DC24V, the present invention is proposed because of the problem that new controllers from other manufacturers cannot be compatible with circuit breakers of old automation complete sets due to different parameter standards.

[0006] Therefore, the technical problem to be solved by the present invention is to provide a new backup power source for the circuit breaker by autonomously adjusting the module of the power supply system.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: an automatic circuit breaker power supply system, comprising: a dual power switch, receiving an AC input from a PT, and electrically connecting an intermediate relay to other loads; Inverter circuit board, electrically connected to the battery pack and other loads; The dual power switch is electrically connected to the inverter circuit board through a power module.

[0008] As a preferred solution of the automatic circuit breaker power supply system described in the present invention, the power module converts AC power into DC power through a rectifier and filter circuit to supply the battery pack and the inverter circuit board.

[0009] As a preferred solution of the automatic circuit breaker power supply system described in the present invention, wherein: the power module is electrically connected to a protection device to monitor the system current and voltage; The protection device is also electrically connected to a control circuit as the main load of the power supply system; The control circuit includes an opening output, a closing output, and an energy storage power supply.

[0010] As a preferred solution of the automatic circuit breaker power supply system of the present invention, wherein: the intermediate relay is electrically connected to the inverter circuit board through a normally closed point; The intermediate relay is electrically connected to the AC output of the dual power switch through a normally open point.

[0011] As a preferred solution of the automatic circuit breaker power supply system of the present invention, wherein: the intermediate relay is electrically connected to an energy storage motor; The energy storage motor provides electric energy for remote signaling operation through the closing coil HQ and the opening coil TQ; The remote control panel is electrically connected to the closing coil HQ and the opening coil TQ, and pressure plates -1LP1 and -2LP2 are respectively provided on the circuits.

[0012] The beneficial effects of the present invention are as follows: the problem of replacing old controllers of distribution automation is solved, and the feasibility of distribution network planning is improved.

[0013] Due to different parameter standards, new controllers from other manufacturers are not compatible with the circuit breakers of old automation equipment, and the operating modes are completely different. A completely new system and a completely new execution mode are needed to match the needs of power system switching.

[0014] Therefore, the technical problem to be solved by the present invention is that a reasonable and safe operation execution method is needed to match a compatible system.

[0015] To solve the above technical problems, the present invention also provides the following technical solutions: an execution method of an automatic circuit breaker power supply system, comprising the automatic circuit breaker power supply system, and, in normal state, a PT outputs alternating current to a required load; When the power is off, the power supply system is switched, and the battery pack supplies energy to the load through the inverter circuit board; The status of the power supply system is judged and controlled through the intermediate relay.

[0016] As a preferred solution of the method for executing an automatic circuit breaker power supply system of the present invention, wherein: the PT converts the 10kV voltage into AC220V and inputs it into the dual power switch; The power module charges the battery and provides remote signal power for the DC circuit; The dual power switch detects that the main power supply is normal and outputs it to the control circuit and power module; The intermediate relay is connected through the normally open point, allowing AC220V to power the control circuit.

[0017] As a preferred solution of the method for executing an automated circuit breaker power supply system of the present invention, wherein: the PT loses power, and the dual power switch detects that the main power fails; The dual power switcher switches to the backup power supply end, and the battery starts to discharge to provide DC24V power to the inverter circuit board; The inverter circuit board converts DC24V into AC220V and outputs it to the normally closed point of the intermediate relay; The normally closed point of the intermediate relay is connected, and the AC220V output by the inverter circuit board is introduced into the control circuit.

[0018] As a preferred solution of the method for executing an automatic circuit breaker power supply system of the present invention, in which: in case of power failure, The normally open point of the intermediate relay is disconnected, and the normally closed point is connected, allowing the AC220V output of the inverter circuit board to power the control circuit; The system continues to operate in a power-off state, and the remote control panel sends a fault alarm message.

[0019] As a preferred solution of the method for executing an automatic circuit breaker power supply system of the present invention, when a closing command is received, the remote control panel starts the energy storage motor to start storing energy; When the preset pressure value is reached, the energy storage motor stops working and the system enters the ready state; When the opening command is received again, the remote control panel triggers the corresponding solenoid valve to release pressure, causing the circuit breaker to open. The beneficial effects of the present invention are as follows: the reliable operation of power distribution automation equipment is improved, and based on the secondary wiring principle, the problem of new control boxes being compatible with old circuit breakers is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1A schematic structural diagram of an automatic circuit breaker power supply system according to an embodiment of the present invention; Figure 2 A schematic diagram of the operation of an automatic circuit breaker power supply system under normal conditions according to an embodiment of the present invention; Figure 3 A schematic diagram of the operation of an automatic circuit breaker power supply system in a power outage condition according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0024] Furthermore, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0025] Example 1 Reference Figure 1 ,This embodiment provides an automated circuit breaker power supply system, including a dual power switch, receiving an AC input from a PT, and electrically connecting an intermediate relay to other loads; Inverter circuit board, electrically connected to the battery pack and other loads; The dual power switch is electrically connected to the inverter circuit board through a power module.

[0026] The main purpose of this circuit system is to realize the function of uninterruptible power supply (UPS). It can automatically switch to another power source when one power source fails, thus ensuring the continuous power supply of the load equipment. These components work together to ensure that uninterrupted power supply is maintained even in the event of a main power failure.

[0027] Example 2 Reference Figures 1 to 3 , which is the second embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that: the power module converts AC power into DC power through a rectifier and filter circuit to supply the battery pack and the inverter circuit board.

[0028] The power module is electrically connected to a protection device that monitors the system current and voltage. The protection device monitors the current and voltage in the circuit, and once an abnormal situation exceeding the set value is detected, it will immediately take action, such as blowing a fuse or triggering a circuit breaker to trip, thereby protecting the safety of the entire system and equipment.

[0029] The protection device is also electrically connected to a control circuit as the main load of the power supply system; The control circuit includes opening output, closing output and energy storage power supply, which are used to generate execution signals corresponding to the feedback of opening and closing coils respectively, and the energy storage power supply is the power supply.

[0030] Starting from the input side, the PT inputs 220V AC, which is the power source of the entire system. The dual power switcher automatically switches between the main power supply and the backup power supply to ensure the continuity of control. When there is a problem with the main power supply, such as voltage drop or complete failure, the dual power switcher will transfer the load to the backup power supply.

[0031] The inverter circuit board is responsible for converting the DC power supply (DC24V) into AC power (AC220V) when the main power supply fails. The purpose of this is to maintain the power supply of the control circuit and ensure that the system can continue to operate. In this process, the lead-acid battery pack plays a vital role. It stores energy and releases it when necessary to provide the required DC power for the inverter circuit board.

[0032] Example 3 Reference Figures 1 to 3 , which is the third embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that: the intermediate relay is electrically connected to the inverter circuit board through a normally closed point; The intermediate relay is electrically connected to the AC output of the dual power switch through a normally open point.

[0033] The intermediate relay is electrically connected to the energy storage motor; The energy storage motor provides power for remote signaling operation through the closing coil HQ and the opening coil TQ; The remote control panel is electrically connected to the closing coil HQ and the opening coil TQ, and pressure plates -1LP1 and -2LP2 are respectively provided on the circuits.

[0034] Intermediate relays are one of the important components of this system. They are used to control the on and off of the circuit in AC and DC circuits, thereby realizing the protection and control of the circuit. When the system detects an abnormal situation, such as overload or short circuit, the AC and DC relays will act quickly to cut off the circuit to avoid damaging the equipment and affecting the stability of the system.

[0035] There are pressure plates -1LP1 and -1LP2 between the opening and closing coils HQ and TQ and the remote control panel. When the pressure plates are withdrawn, the opening and closing circuits are disconnected, so that they cannot be operated through the control box, which is convenient for use during inspection and maintenance.

[0036] In detail, due to the failure of the main power supply, the normally open point of the intermediate relay is disconnected and the normally closed point is connected. The AC220V output by the inverter circuit board is allowed to power the control circuit. The normally closed point is connected, and the AC220V output by the inverter circuit board is introduced into the control circuit. The rapid steering of the current is achieved to ensure the continuous power supply of the control circuit.

[0037] Example 4 Reference Figures 1 to 3 , which is the fourth embodiment of the present invention, and this embodiment provides an execution method of an automatic circuit breaker power supply system. This embodiment is based on the previous embodiment, and is different from the previous embodiment in that: in normal state, the PT outputs AC power to the required load; When the power is off, the power supply system is switched, and the battery pack supplies energy to the load through the inverter circuit board; The status of the power supply system is judged and controlled through the intermediate relay.

[0038] The system continuously monitors the status of the main power supply. If the main power supply is working properly, it will directly power the control circuit. However, once the main power supply fails, the dual power switch will immediately intervene and transfer the load to the backup power supply. At this time, the inverter circuit board will be activated and use the DC power provided by the lead-acid battery to generate AC power to continue to power the control circuit.

[0039] Example 5 Reference Figures 1 to 3 , which is the fifth embodiment of the present invention, and is based on the previous embodiment, and is different from the previous embodiment in that: the PT converts the 10kV voltage into AC220V and inputs it into the dual power switch; The power module charges the battery and provides remote signal power for the DC circuit; The dual power switch detects that the main power supply is normal and outputs it to the control circuit and power module; The intermediate relay is connected through the normally open point, allowing AC220V to power the control circuit.

[0040] Under normal conditions, the system will give priority to using the main power supply as the main energy source. This is because the main power supply is usually more stable and reliable. At the same time, the system will also regularly check and maintain the backup power supply to ensure that it can smoothly take over the power supply task at critical moments.

[0041] Example 6 Reference Figures 1 to 3 , which is the sixth embodiment of the present invention, and this embodiment is based on the previous embodiment, and is different from the previous embodiment in that: the PT loses power, and the dual power switch detects that the main power fails; The dual power switcher switches to the backup power supply end, and the battery starts to discharge to provide DC24V power to the inverter circuit board; The inverter circuit board converts DC24V into AC220V and outputs it to the normally closed point of the intermediate relay; The normally closed point of the intermediate relay is connected, and the AC220V output by the inverter circuit board is introduced into the control circuit.

[0042] In case of power outage, The normally open point of the intermediate relay is disconnected, and the normally closed point is connected, allowing the AC220V output of the inverter circuit board to power the control circuit; The system continues to operate in a power-off state, and the remote control panel sends a fault alarm message.

[0043] In the case of power failure, the system will enter emergency mode. At this time, the dual power switch will automatically switch to the backup power supply, and the inverter circuit board will start working to convert the DC power in the lead-acid battery into AC power. This design ensures that the system can maintain basic operating requirements even without external power supply. At the same time, the alarm action can be completed.

[0044] Example 7 Reference Figures 1 to 3 , which is the seventh embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that: when a closing command is received, the remote control panel starts the energy storage motor to start storing energy; When the preset pressure value is reached, the energy storage motor stops working and the system enters the ready state; When the opening command is received again, the remote control panel triggers the corresponding solenoid valve to release the pressure and open the circuit breaker.

[0045] There are also manual opening and manual closing buttons outside the equipment. The two are normally open buttons. When pressed, the circuit is connected to the remote signal to the main board. After the main board detects the remote signal, it sends out opening and closing instructions, allowing the remote control board to trigger the circuit breaker coil to operate and open and close the switch.

[0046] In detail, the switch cable only serves as a direct medium between the control box and the circuit breaker. The energy storage motor is connected to the intermediate relay. During normal operation, the AC output is directly given to the intermediate relay and then to the energy storage motor. The battery will only output when there is a power outage. There will be a priority level. When the line is out of power, the battery will discharge if it is not charged.

[0047] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0048] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0049] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An automatic circuit breaker power supply system, characterized in that: include, Dual power switch, receiving AC input from PT, electrically connecting the intermediate relay to other loads; Inverter circuit board, electrically connected to the battery pack and other loads; The dual power switch is electrically connected to the inverter circuit board through a power module.

2. The automatic circuit breaker power supply system according to claim 1, characterized in that: The power module converts AC power into DC power through rectification and filtering circuits, and supplies the DC power to the battery pack and the inverter circuit board.

3. An automatic circuit breaker power supply system according to claim 2, characterized in that: The power module is electrically connected to a protection device to monitor the system current and voltage; The protection device is also electrically connected to a control circuit as the main load of the power supply system; The control circuit includes an opening output, a closing output, and an energy storage power supply.

4. The automatic circuit breaker power supply system according to claim 3, characterized in that: The intermediate relay is electrically connected to the inverter circuit board via a normally closed point; The intermediate relay is electrically connected to the AC output of the dual power switch through a normally open point.

5. The automatic circuit breaker power supply system according to claim 4, characterized in that: The intermediate relay is electrically connected to an energy storage motor; The energy storage motor provides electric energy for remote signaling operation through the closing coil HQ and the opening coil TQ; The remote control panel is electrically connected to the closing coil HQ and the opening coil TQ, and pressure plates -1LP1 and -2LP2 are respectively provided on the circuits.

6. An execution method of an automated circuit breaker power supply system, characterized in that: An automatic circuit breaker power supply system comprising the automatic circuit breaker power supply system according to claim 5, and Under normal conditions, the PT outputs AC power to the required load; When the power is off, the power supply system is switched, and the battery pack supplies energy to the load through the inverter circuit board; The status of the power supply system is judged and controlled through the intermediate relay.

7. The method for executing an automatic circuit breaker power supply system according to claim 6, characterized in that: The PT converts the 10kV voltage into AC220V and inputs it into the dual power switch; The power module charges the battery and provides remote signal power for the DC circuit; The dual power switch detects that the main power supply is normal and outputs it to the control circuit and power module; The intermediate relay is connected through the normally open point, allowing AC220V to power the control circuit.

8. The method for executing an automatic circuit breaker power supply system according to claim 7, characterized in that: The PT loses power and the dual power switch detects that the main power supply has failed; The dual power switcher switches to the backup power supply end, and the battery starts to discharge, providing DC24V power to the inverter circuit board; The inverter circuit board converts DC24V into AC220V and outputs it to the normally closed point of the intermediate relay; The normally closed point of the intermediate relay is connected, and the AC220V output by the inverter circuit board is introduced into the control circuit.

9. The method for executing an automatic circuit breaker power supply system according to claim 8, characterized in that: In case of power outage, The normally open point of the intermediate relay is disconnected, and the normally closed point is connected, allowing the AC220V output of the inverter circuit board to power the control circuit; The system continues to operate in a power-off state, and the remote control panel sends a fault alarm message.

10. The method for executing an automatic circuit breaker power supply system according to claim 9, characterized in that: When the closing command is received, the remote control panel starts the energy storage motor to start storing energy; When the preset pressure value is reached, the energy storage motor stops working and the system enters the ready state; When the opening command is received again, the remote control panel triggers the corresponding solenoid valve to release the pressure and open the circuit breaker.

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