A power grid information monitoring system

Abstract

The utility model discloses a power grid information monitoring system, AC / DC module is used for receiving commercial power conversion into direct current and is powered for main control module. The electric energy meter is arranged in the power grid and is used for detecting the power grid information. The AC contactor is arranged in the power grid and is connected with the main control module signal, and the AC contactor is controlled by the main control module to switch the circuit that it wants to output, and then makes the electric energy meter switch between the connection state and the disconnected state. The utility model discloses the main control module and the AC contactor cooperate with each other, when needing to check whether the electric leakage, the main control module controls the AC contactor and the electric energy meter and switches to the connection state, can detect the power grid information. Under the normal work of the power grid, when not needing to check whether the electric leakage, the main control module controls the AC contactor and the electric energy meter and switches to the disconnected state, even if the power grid is struck by lightning, and the electric energy meter also can not be damaged.

Description

Technical Field

[0001] This utility model belongs to the field of power systems, and in particular relates to a power grid information monitoring system. Background Technology

[0002] In existing road lighting systems, electricity meters, as critical devices for measuring electricity consumption and detecting leakage current, are used to monitor power grid information and typically require long-term stable operation to ensure the safety and reliability of the power system. However, because outdoor lighting facilities are exposed to complex environments, especially during thunderstorms, electricity meters are highly susceptible to lightning surges, which can damage their internal circuits and affect their normal operation. This damage not only leads to inaccurate electricity measurement but may also cause safety hazards such as leakage current, further impacting the stable operation of the entire lighting system. Therefore, there is an urgent need for a power grid information monitoring system to effectively monitor the power grid. Utility Model Content

[0003] The technical objective of this invention is to provide a power grid information monitoring system to achieve effective monitoring of the power grid.

[0004] To solve the above problems, the technical solution of this utility model is as follows: A power grid information monitoring system, comprising: AC / DC module, AC contactor, main control module and energy meter; The AC / DC module is electrically connected to the main control module and is configured to receive mains power, convert it into DC power, and power the main control module. The electricity meter is installed in the power grid and configured to detect power grid information; The AC contactor is installed in the power grid and connected to the main control module. The AC contactor is controlled by the main control module to switch the circuit it wants to output, thereby enabling the energy meter to switch between the connected state and the disconnected state. When it is necessary to detect grid data, switch the electricity meter to the connected state to connect with the grid in order to detect whether there is leakage in the grid; after the grid data detection is completed, switch the electricity meter to the disconnected state to disconnect from the grid in order to stop detecting grid information.

[0005] The AC contactor includes several switching switches arranged in parallel, each of which is connected to the three-phase lines in the power grid; the energy meter is connected to the three-phase lines. When the switch is switched to the phase line where the energy meter is located, the energy meter is in the connected state; when the switch is switched to the phase line where the energy meter is not located, the energy meter is in the disconnected state.

[0006] More preferably, a communication module is also provided. The main control module is connected to the electricity meter signal and is configured to collect the power grid information detected by the electricity meter. The communication module is connected to the main control module signal and is configured to receive the collected electricity meter detection values ​​from the main control module and upload them to an external business cloud platform. It also receives instructions from the external business cloud platform and sends them to the main control module to control the connection or disconnection of the electricity meter in real time.

[0007] More preferably, a switch module is also provided, which is located between the main control module and the energy meter; When the AC contactor is connected to the energy meter and the switch module is connected to the energy meter, the main control module can obtain the energy meter's detection value. When the AC contactor is disconnected from the electricity meter and the switch module is disconnected from the electricity meter, damage to the electricity meter during a lightning strike can be avoided.

[0008] More preferably, a lightning protection module is also provided, which is connected to the front end of the AC / DC module and is configured to provide lightning protection for the main control module.

[0009] The lightning protection module, AC / DC module, main control module and communication module are all housed in the same enclosure, while the electricity meter is located outside the enclosure.

[0010] Specifically, the surge protection module, AC / DC module, main control module, and communication module are all replaceable modules.

[0011] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art: In this invention, the main control module and the AC contactor work together. When a self-check for leakage is required, the main control module controls the AC contactor to switch to a connected state with the electricity meter, enabling the detection of power grid information. Under normal power grid operation, when leakage detection is not required, the main control module controls the AC contactor to switch to a disconnected state with the electricity meter, ensuring that the electricity meter will not be damaged even if the power grid is struck by lightning. Attached Figure Description

[0012] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention.

[0013] Figure 1 This is a structural block diagram of a power grid information monitoring system according to the present invention. Detailed Implementation

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0015] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0016] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a power grid information monitoring system based on this utility model. The advantages and features of this utility model will become clearer from the following description and claims.

[0017] Example See Figure 1 This embodiment provides a power grid information monitoring system, which mainly includes an AC / DC module, an AC contactor, a main control module, and an energy meter.

[0018] The AC / DC module is located on the far left and is electrically connected to the main control module. It receives mains power from an external source, converts it into DC power, and supplies power to the main control module. The AC contactor is installed in the power grid and connected to its three phases. Furthermore, the AC contactor is signal-connected to the main control module and is controlled by the main control module to switch its output circuit, thereby switching the energy meter between connected and disconnected states (in the connected state, the energy meter is connected to the grid; in the disconnected state, the energy meter is disconnected from the grid). The energy meter is installed in the power grid to detect grid information.

[0019] Specifically, the AC contactor can be viewed internally as several parallel switching switches. Each switching switch is sequentially connected to one of the three phase lines of the power grid and is located at the center of the three phase lines, thus enabling switching between two circuits. Since the electricity meter is connected to the three phase lines, the main control module controls the AC contactor switching circuit. When the switching switch is switched to the phase line where the electricity meter is located, the electricity meter is in the connected state and can detect power grid information. Under normal power grid operation, there is no need to detect leakage. Switching the switching switch to the phase line where the electricity meter is not located puts the electricity meter in the disconnected state, and even if struck by lightning, the electricity meter will not be damaged.

[0020] Preferably, this implementation also includes a communication module, also powered by the AC / DC module. The communication module is signal-connected to the main control module, used to receive the collected electricity meter readings from the main control module and upload them to an external business cloud platform. It can also receive commands from the external business cloud platform and send them to the main control module to control the connection or disconnection of the electricity meter in real time, and monitor grid information in real time as needed. Of course, this communication module is not mandatory; without it, data cannot be transmitted to the business cloud platform, and normal electricity meter measurement data can still be viewed offline.

[0021] Preferably, a switch module is also provided between the main control module and the energy meter. When the AC contactor is connected to the energy meter, and the main control module controls the switch module to connect to the energy meter, the main control module can obtain the energy meter's detection value and transmit it to the business cloud platform through the communication module. When the AC contactor is disconnected from the energy meter, and the main control module controls the switch module to disconnect from the energy meter, damage to the energy meter during lightning strikes can be avoided. Of course, other connection methods can also be used between the main control module and the energy meter, such as signal connection, to avoid damage to the energy meter during lightning strikes.

[0022] Preferably, this embodiment also includes a surge protection module, which is connected to the front end of the AC / DC module and configured to provide surge protection for the main control module to prevent damage to the module.

[0023] Furthermore, the surge protection module, AC / DC module, main control module, and communication module are all housed within the same casing, while the energy meter is located externally relative to the casing. All these modules are replaceable, allowing for easy replacement in case of damage from lightning strikes.

[0024] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A power grid information monitoring system, characterized in that, include: AC / DC module, AC contactor, main control module and energy meter; The AC / DC module is electrically connected to the main control module and is configured to receive mains power, convert it into DC power, and supply power to the main control module. The electricity meter is installed in the power grid and configured to detect power grid information; The AC contactor is installed in the power grid and is signal-connected to the main control module. The AC contactor is controlled by the main control module to switch the circuit it wants to output, thereby enabling the energy meter to switch between connected and disconnected states. When it is necessary to detect power grid data, the energy meter is switched to the connected state and connected to the power grid to detect whether there is leakage in the power grid; After detecting the power grid data, the electricity meter is switched to the disconnected state to stop detecting power grid information.

2. The power grid information monitoring system according to claim 1, characterized in that, The AC contactor includes several switching switches arranged in parallel, each of which is connected to a three-phase line in the power grid; the energy meter is connected to the three-phase line. When the switch is switched to a phase line where the energy meter is located, the energy meter is in a connected state; when the switch is switched to a phase line where the energy meter is not located, the energy meter is in a disconnected state.

3. The power grid information monitoring system according to claim 1, characterized in that, The system also includes a communication module. The main control module is connected to the electricity meter and configured to collect the power grid information detected by the electricity meter. The communication module is also connected to the main control module and configured to receive the collected electricity meter detection values ​​from the main control module and upload them to an external business cloud platform. The system also receives instructions from the external business cloud platform and sends them to the main control module to control the connection or disconnection of the electricity meter in real time.

4. The power grid information monitoring system according to claim 1, characterized in that, A switch module is also provided, which is located between the main control module and the energy meter; When the AC contactor is connected to the energy meter and the switch module is connected to the energy meter, the main control module can obtain the energy meter detection value. When the AC contactor is disconnected from the electricity meter and the switch module is disconnected from the electricity meter, damage to the electricity meter can be avoided in the event of a lightning strike.

5. The power grid information monitoring system according to claim 3, characterized in that, A lightning protection module is also provided, which is connected to the front end of the AC / DC module and is configured to provide lightning protection for the main control module.

6. The power grid information monitoring system according to claim 5, characterized in that, The lightning protection module, the AC / DC module, the main control module, and the communication module are all housed in the same housing, while the energy meter is located outside the housing.

7. The power grid information monitoring system according to claim 5, characterized in that, The lightning protection module, the AC / DC module, the main control module, and the communication module are all replaceable modules.

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