A remote monitoring system for circuit breaker

Abstract

The present invention discloses a circuit breaker remote monitoring system, comprising an execution circuit, including a voltage transformer, which is electrically connected to an opening coil and a closing coil; a secondary trigger circuit, including a DTU and a mobile phone remote controller; the mobile phone remote controller transmits commands to the execution circuit; and the DTU monitors the execution circuit. The efficient power management system integrated with modern information technology improves the convenience and efficiency of circuit breaker operation and ensures the safe and stable operation of the power grid.

Description

Technical Field

[0001] The invention relates to the field of power distribution, and in particular to a circuit breaker remote monitoring system. Background Art

[0002] For ZW8 vacuum circuit breakers and ZW32 vacuum circuit breakers on 10KV distribution line poles, ZW8 vacuum circuit breaker uses the principle of CT-23 spring operating mechanism. After power is turned on, the energy storage motor is activated, driving the gear or chain to make the energy storage spring run to the travel switch to cut off the power supply of the energy storage motor, and at the same time connect the closing circuit, so that the closing electromagnet top iron, that is, the striker, hits the closing link to close the circuit, or after the insulating rod is manually stored with energy, the insulating rod is manually pulled to open and close the circuit.

[0003] The ZW8 vacuum circuit breaker lacks a 10KV voltage transformer in its design, a secondary control box in its design, and the protection setting adjustment transformer tap. The protection setting adjustment cannot be accurate. When installed on a 10KV distribution line, it does not play an automated role and only uses manual operation to open and close the circuit breaker. The operation method is backward and safety and flexibility cannot be guaranteed.

[0004] The ZW32 vacuum circuit breaker is equipped with a 10KV voltage transformer and a circuit breaker secondary control box, which can realize intelligent remote control of 50-meter electric opening and closing and manual opening and closing. The protection setting value can be adjusted accurately, but the operating parameters can only be viewed in the distribution network automation system, but the circuit breaker opening and closing cannot be operated by a smartphone at an unlimited distance, and the operating parameters cannot be remotely detected by a smartphone at all times.

[0005] Combining the shortcomings of the two existing circuit breakers, a circuit breaker monitoring system is designed, which can drive the circuit breaker operating system through a smartphone application, view real-time data, and perform remote control. Summary of the invention

[0006] 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.

[0007] In view of the problem that the ZW32 vacuum circuit breaker in the above-mentioned prior art cannot realize remote real-time detection of operating parameters by a smartphone, and the ZW8 vacuum circuit breaker body design lacks a circuit breaker secondary control box, the present invention is proposed.

[0008] Therefore, the technical problem to be solved by the present invention is to design a circuit breaker monitoring system that drives the circuit breaker operating system through a smartphone application, and checks real-time data and performs remote control.

[0009] To solve the above technical problems, the present invention provides the following technical solutions: A circuit breaker remote monitoring system, comprising: an execution circuit, including a voltage transformer, which is electrically connected to an opening coil and a closing coil;

[0010] Secondary trigger circuit, including DTU and mobile phone remote controller;

[0011] The mobile phone remote control controller transmits commands to the execution circuit;

[0012] The DTU monitors the execution circuit.

[0013] As a preferred solution of the circuit breaker remote monitoring system of the present invention, wherein: one end of the voltage transformer is connected to a high voltage power supply, and the output end of the other end is connected to an air switch;

[0014] One end of the air switch is connected to the output end of the voltage transformer, and the other end is connected to the input end of the rectifier bridge.

[0015] As a preferred solution of the circuit breaker remote monitoring system of the present invention, wherein: the execution circuit includes a rectifier bridge, one end of which is connected to the output end of the air switch, and the other end outputs direct current to the direct current power supply;

[0016] The DC power supply controls the opening coil and the closing coil.

[0017] As a preferred solution of the circuit breaker remote monitoring system of the present invention, wherein: the mobile phone remote control controller receives remote control instructions and controls the opening and closing operations of the circuit breaker;

[0018] The DTU has a built-in signal card that matches the mobile phone remote control controller, and establishes a network system connection with it through a communication network;

[0019] The DTU transmits on-site data to the remote monitoring system.

[0020] As a preferred solution of the circuit breaker remote monitoring system of the present invention, wherein: the secondary trigger circuit includes an NO contact and a current protector;

[0021] The mobile phone remote control controller is connected with a closing button and an opening button.

[0022] As a preferred solution of the circuit breaker remote monitoring system of the present invention, wherein: one end of the NO contact is electrically connected to the closing button, and the other end is electrically connected to the closing coil;

[0023] The closing coil is connected in parallel with the opening coil. One end of the opening coil is electrically connected to the opening button, and the other end is electrically connected to the current protector.

[0024] As a preferred solution of the circuit breaker remote monitoring system of the present invention, wherein: the current protector is remotely connected to the DTU via a 485 communication line;

[0025] The current protector is equipped with an ammeter to monitor the current status and feed it back to the DTU;

[0026] The DTU remotely feeds back the current status to the mobile phone remote controller. The air switch is also connected in parallel with an AC contactor;

[0027] The AC contactor is electrically connected to an energy storage motor;

[0028] The outer collar of the AC contactor is connected with a driving coil.

[0029] As a preferred solution of the circuit breaker remote monitoring system of the present invention, wherein: the AC and DC inputs of the secondary trigger circuit are both provided with a power circuit breaker X

[0030] The beneficial effects of the present invention are as follows: an efficient power management system integrating modern information technology improves the convenience and efficiency of circuit breaker operation and ensures the safe and stable operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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:

[0032] Figure 1 A system logic diagram of a circuit breaker remote monitoring system according to an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of an execution circuit of a circuit breaker remote monitoring system according to an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of a secondary trigger circuit of a circuit breaker remote monitoring system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Example 1

[0040] Reference Figures 1 to 3 This embodiment provides a circuit breaker remote monitoring system, including an execution circuit 100, including a voltage transformer 100a. The existence of the transformer first satisfies the possibility of extending the secondary circuit of the circuit breaker, and then the secondary circuit needs to be refined. The transformer is electrically connected to the opening coil 101 and the closing coil 102;

[0041] Further, the secondary trigger circuit 200 includes a DTU and a mobile phone remote controller;

[0042] The mobile phone remote controller transmits commands to the execution circuit 100, and the DTU monitors the execution circuit, thereby achieving the effect of remote control and monitoring.

[0043] Example 2

[0044] Reference Figures 1 to 3 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment, and is different from the previous embodiment in that: one end of the voltage transformer 100a is connected to the high voltage power supply, and the other end of the output end is connected to the air switch;

[0045] In detail, the transformer is a 10kV sheep horn voltage transformer: it is used to convert high voltage (10KV) into low voltage (0.22kV) so that subsequent equipment can safely handle this voltage level.

[0046] As a protection device for the main circuit, the air switch automatically cuts off the circuit when the current exceeds the set value to prevent overload or short circuit from damaging other equipment. One end of the air switch is connected to the output end of the voltage transformer, and the other end is connected to the input end of the rectifier bridge.

[0047] The execution circuit 100 also includes a rectifier bridge 100b, which converts AC power into DC power for subsequent use by DC loads. One end of the rectifier bridge is connected to the output end of the air switch, and the other end outputs DC power to the DC power supply;

[0048] The DC power supply DC is supplied to various electronic devices and actuators in the system by the DC power output by the rectifier bridge, and the DC power controls the opening coil 101 and the closing coil 102 respectively.

[0049] Example 3

[0050] 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 mobile phone remote control controller receives the remote control command and controls the opening and closing operations of the circuit breaker;

[0051] DTU has a built-in signal card that matches the mobile phone remote controller and establishes a network system connection with it through the communication network;

[0052] DTU transmits on-site data to the remote monitoring system.

[0053] In detail, the 4G mobile phone remote controller allows users to remotely monitor and control the status of the system through mobile devices. It has a built-in microprocessor to parse the received commands and send them to the corresponding execution components.

[0054] DTU sends the collected data and status information to the remote server via the 4G network, and also receives instructions from the remote control center.

[0055] Example 4

[0056] Reference Figures 1 to 3 , which is the fourth embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that: the secondary trigger circuit 200 includes, a NO contact, a current protector;

[0057] The mobile phone remote controller is connected with a closing button and an opening button.

[0058] In detail, the closing button and the opening button are used to manually control the closing and opening actions of the circuit breaker. These buttons are usually located on the control cabinet on site, which is convenient for the staff to operate directly.

[0059] One end of the NO contact is electrically connected to the closing button, and the other end is electrically connected to the closing coil. When the operator presses the closing button, the normally open NO contact closes to form a circuit connection.

[0060] The closed NO contact allows the control signal to pass, thereby activating the energy storage motor or AC contactor and driving the circuit breaker to close.

[0061] The closing coil is connected in parallel with the opening coil, one end of the opening coil is electrically connected to the opening button, and the other end is electrically connected to the current protector.

[0062] Furthermore, the current protector is remotely connected to the DTU via a 485 communication line;

[0063] In detail, the current protector monitors the current in the circuit. Once an abnormal situation (such as overload or short circuit) is detected, it will trigger the protection mechanism and notify the DTU through the 485 communication line to take corresponding measures. It is equivalent to the current protector having an ammeter built in, monitoring the current status and feeding it back to the DTU;

[0064] Furthermore, DTU remotely feeds back the current status to the mobile phone remote controller. The 4GDTU wireless data transmission module accesses the mobile network through the built-in mobile phone card, realizing the wireless data transmission function. It can send back the on-site electrical parameters and status reports to the remote monitoring system in real time, and can also accept remote operation instructions.

[0065] Example 5

[0066] Reference Figures 1 to 3 , which is the fifth embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that: an AC contactor is further connected in parallel to the air switch;

[0067] In detail, the AC contactor is used as an electromagnetic relay to switch the high-power circuit on and off. It can be activated by a low-power control signal to achieve control of the main circuit.

[0068] The AC contactor is electrically connected to an energy storage motor, which is responsible for driving the mechanical movement of the circuit breaker to achieve the action of closing and opening. Its start and stop are controlled by the instructions issued by the control system. ;

[0069] The AC contactor has a driving coil connected to its outer collar, which serves as an execution supply unit of the AC contactor.

[0070] The AC and DC inputs of the secondary trigger circuit 200 are both provided with a power circuit breaker X for protecting the circuit.

[0071] Example 6

[0072] Reference Figures 1 to 3, which is the sixth embodiment of the present invention, is based on the previous embodiment, and is different from the previous embodiment in that:

[0073] The entire working principle and signal direction are as follows:

[0074] Input end: 10kV high voltage is stepped down to 0.22kV through the Yangjiao voltage transformer, and then enters the air switch.

[0075] Output end: The 0.22kV voltage coming out of the air switch is divided into two paths:

[0076] One path is converted into DC220V through a rectifier bridge to supply power to the DC load.

[0077] The other circuit is directly used as an AC power source to supply power to AC loads (such as AC contactors and energy storage motors).

[0078] Control circuit: The 4G mobile phone remote controller receives remote instructions and controls the action of the circuit breaker through the closing button or the opening button. At the same time, the current protector monitors the current and feeds back to the DTU through the 485 communication line when necessary.

[0079] Data transmission: DTU sends the collected data and status information to the remote server through the 4G network, and also receives instructions from the remote control center.

[0080] Users can access the system through an app on their smartphones to view real-time data, history and perform remote control, which greatly improves the convenience and efficiency of operation.

[0081] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality 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.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0082] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0083] 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.

[0084] 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. A circuit breaker remote monitoring system, characterized in that: include, An execution circuit (100) comprises a voltage transformer (100a) electrically connected to an opening coil (101) and a closing coil (102); A secondary trigger circuit (200), including a DTU and a mobile phone remote controller; The mobile phone remote control controller transmits commands to the execution circuit (100); The DTU monitors the execution circuit.

2. The circuit breaker remote monitoring system according to claim 1, characterized in that: One end of the voltage transformer (100a) is connected to a high voltage power supply, and the other end of the output end is connected to an air switch; One end of the air switch is connected to the output end of the voltage transformer, and the other end is connected to the input end of the rectifier bridge.

3. The circuit breaker remote monitoring system according to claim 2, characterized in that: The execution circuit (100) comprises a rectifier bridge (100b), one end of which is connected to the output end of the air switch, and the other end of which outputs direct current to a direct current power supply; The DC power supply controls the opening coil (101) and the closing coil (102).

4. The circuit breaker remote monitoring system according to claim 3, characterized in that: The mobile phone remote controller receives remote control instructions and controls the opening and closing operations of the circuit breaker; The DTU has a built-in signal card that matches the mobile phone remote control controller, and establishes a network system connection with it through a communication network; The DTU transmits on-site data to the remote monitoring system.

5. The circuit breaker remote monitoring system according to claim 4, characterized in that: The secondary trigger circuit (200) comprises an NO contact and a current protector; The mobile phone remote control controller is connected with a closing button and an opening button.

6. The circuit breaker remote monitoring system according to claim 5, characterized in that: One end of the NO contact is electrically connected to the closing button, and the other end is electrically connected to the closing coil; The closing coil is connected in parallel with the opening coil. One end of the opening coil is electrically connected to the opening button, and the other end is electrically connected to the current protector.

7. The circuit breaker remote monitoring system according to claim 6, characterized in that: The current protector is remotely connected to the DTU via a 485 communication line; The current protector is equipped with an ammeter to monitor the current status and feed it back to the DTU; The DTU remotely feeds back the current status to the mobile phone remote controller.

8. The circuit breaker remote monitoring system according to claim 7, characterized in that: The air switch is further connected in parallel with an AC contactor; The AC contactor is electrically connected to an energy storage motor; The outer collar of the AC contactor is connected with a driving coil.

9. The circuit breaker remote monitoring system according to claim 8, characterized in that: The AC and DC inputs of the secondary trigger circuit (200) are both provided with a power circuit breaker X.

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