A fault monitoring system for a power distribution network

Abstract

The utility model discloses a kind of fault monitoring systems of distribution area, including being arranged at the first monitoring module of distribution area and being arranged on each user branch of distribution area second monitoring module;The first monitoring module is used to monitor the fault state information of distribution area, the second monitoring module is used to monitor the fault state on each user branch in distribution area range;The first monitoring module, second monitoring module are connected with area controller, and the area controller is connected with fault alarm, and the fault alarm is used to send fault reminder information to operation and maintenance personnel or user branch corresponding user.The utility model is characterized in that:for respectively monitoring and alarm reminding of distribution area fault and area user branch fault, the comprehensiveness of the monitoring in area is improved, so that area user can accurately know area fault or user branch fault, improve data support for subsequent maintenance, facilitate quick repair.

Description

Technical Field

[0001] This utility model relates to the field of power distribution monitoring, and in particular to a fault monitoring system for a power distribution substation. Background Technology

[0002] A distribution transformer substation refers to the area supplied by a single distribution transformer. Typically, a distribution transformer substation includes multiple users and corresponding power lines. Existing technology for monitoring distribution transformer substations is quite mature, enabling the monitoring of power outages. Sensors installed at the substation or transformer location monitor for faults or power outages. Upon receiving a fault or power outage notification, the power grid's backend server notifies maintenance personnel to perform repairs. Power outage monitoring of substations is highly accurate. For example, patent application number 201910177138.1 describes a method for monitoring the operating status and managing faults in low-voltage distribution transformer substations. This method achieves refined monitoring of the operating status of low-voltage distribution transformer substations, enabling timely fault prediction and repair, improving fault response speed, and ensuring the power supply quality and reliability of the substation.

[0003] However, existing technologies often only rely on transformer area faults, and only issue warnings when a transformer area power outage occurs. There is no warning or monitoring for individual user branches within the transformer area. Transformer area faults are not communicated to users, resulting in users being unaware of transformer area faults. Furthermore, user branch faults are not communicated to users or the maintenance platform, meaning that user branch faults within the transformer area cannot be known by maintenance personnel or by users themselves, resulting in incomplete transformer area monitoring. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a fault monitoring system for distribution transformer areas, which is used to monitor and alarm faults in distribution transformer areas and user branch circuits within the transformer area separately, thereby improving the comprehensiveness of monitoring within the transformer area.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a fault monitoring system for a distribution transformer area, comprising a first monitoring module disposed in the distribution transformer area and a second monitoring module disposed on each user branch of the distribution transformer area; the first monitoring module is used to monitor the fault status information of the distribution transformer area, and the second monitoring module is used to monitor the fault status of each user branch within the distribution transformer area.

[0006] Both the first monitoring module and the second monitoring module are connected to the area controller, which is connected to the fault alarm device. The fault alarm device is used to send fault reminder information to maintenance personnel or users corresponding to user branches.

[0007] The fault alarm device includes a user alarm device and an operation and maintenance alarm device. The user alarm device is used to send alarm notifications to users, and the operation and maintenance alarm device is used to send alarms to operation and maintenance personnel.

[0008] The user alarm includes a user mobile terminal and a GSM module; the substation controller is connected to the user mobile terminal through the GSM module and is used to send substation fault information and / or user branch circuit fault information to the user.

[0009] The maintenance alarm includes a maintenance server and an IoT module. The area controller is connected to the maintenance server through the IoT module. The maintenance server sends alarm information to the maintenance personnel's terminal through the network or sends alarm information through the monitoring screen.

[0010] The first monitoring module includes a power grid fault monitoring unit and a power grid power outage monitoring unit. The power grid fault monitoring unit is used to monitor the fault status information of the power grid, and the power grid power outage monitoring unit is used to monitor whether the power supply of the distribution substation is normal. Both the power grid fault monitoring unit and the power grid power outage monitoring unit are connected to the substation controller.

[0011] The second monitoring module includes a load identification smart meter and a power outage monitoring unit; the load identification smart meter is used to identify the user load type on the user branch, and the power outage monitoring unit is used to monitor the power on / off status of the user branch; both the load identification smart meter and the power outage monitoring unit are connected to the transformer area controller.

[0012] The second monitoring module is installed in the meter box of the user branch and is used to monitor the user branch.

[0013] The advantages of this utility model are: it is used to monitor and alarm for faults in the distribution area and faults in user branch circuits within the area, thereby improving the comprehensiveness of monitoring within the area. This allows users within the area to accurately know the faults in the area or the faults in user branch circuits, providing data support for subsequent maintenance and facilitating rapid repair. Attached Figure Description

[0014] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0015] Figure 1 This is a schematic diagram of the monitoring system of this utility model. Detailed Implementation

[0016] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0017] Existing fault monitoring technologies only consider transformer substation faults, neglecting user branch circuits. While maintenance personnel can quickly address and repair transformer substation faults, user branch circuit faults often affect only one or more households within the substation, while other users in the substation maintain normal power supply. In such cases, the lack of timely intervention by maintenance personnel due to the normal operation of the transformer substation leads to user complaints. Therefore, existing technologies that only monitor the area near the transformer substation cannot meet user requirements. Furthermore, fault information is only communicated to maintenance personnel, not to users, causing confusion, repeated calls to the complaint hotline, and further user complaints. This also fails to satisfy users' right to know, resulting in a poor user experience. To address these shortcomings, this embodiment designs and develops a fault monitoring system for distribution transformer substations. This system separately monitors and alarms for both distribution transformer substation faults and user branch circuit faults within the substation, improving the comprehensiveness of monitoring within the substation. This allows users within the substation to accurately identify either transformer substation faults or user branch circuit faults, providing data support for subsequent maintenance and facilitating rapid repairs. The specific solution is as follows:

[0018] like Figure 1 As shown, this embodiment provides a fault monitoring system for a distribution transformer area, including a first monitoring module installed in the distribution transformer area and a second monitoring module installed on each user branch of the distribution transformer area; the first monitoring module is used to monitor the fault status information of the distribution transformer area, and the second monitoring module is used to monitor the fault status of each user branch within the distribution transformer area.

[0019] Both the first and second monitoring modules are connected to the area controller, which is connected to the fault alarm device. The fault alarm device is used to send fault reminder information to maintenance personnel or users corresponding to user branches.

[0020] The first monitoring module is located in the transformer substation area to monitor the power supply status of the entire area to determine parameters such as faults, power outages, and power quality. Since there are multiple users within a substation area, each connected to their home via a meter box, each user represents a branch circuit. The normal operation of the entire substation area does not guarantee the normal operation of each user's branch circuit. Therefore, a second monitoring module is installed in the meter box to monitor the power supply status of each user's branch circuit. The substation controller acquires data from the first and second monitoring modules, determines the substation status and the status of each user's branch circuit, and transmits fault information to maintenance personnel and the users of the respective branch circuits via fault alarms. This allows maintenance personnel to quickly repair faults upon notification, and allows users to plan and adjust their electricity usage, reducing complaints.

[0021] In this embodiment, different paths are used to notify users and to notify maintenance personnel. The fault alarm includes a user alarm and an maintenance alarm. The user alarm is used to send alarm notifications to users, and the maintenance alarm is used to send alarms to maintenance personnel.

[0022] The user alarm system includes a user mobile terminal and a GSM module. The transformer substation controller connects to the user's mobile terminal via the GSM module to send substation fault information and / or user branch circuit fault information to the user. The substation controller is implemented using an industrial-grade computer, PLC controller, microcontroller, or other controllers. The substation controller sends alarm information to the corresponding user's mobile terminal via the GSM module. For example, if a fault is detected in the user branch circuit corresponding to user 'a', an alarm is sent to user 'a's' mobile terminal via the GSM module, alerting them to the fault in their line and achieving the purpose of alerting the user.

[0023] The maintenance alarm system includes a maintenance server and an IoT module. The distribution unit controller connects to the maintenance server via the IoT module. The maintenance server sends alarm information to maintenance personnel's terminals via the network, or sends alarm information through a monitoring screen. The IoT module uses 2G / 3G / 4G / 5G chips to achieve network transmission. The distribution unit controller sends alarm information to the maintenance server or maintenance personnel's mobile phones via the IoT module, thus providing an alert module to facilitate timely repair work by maintenance personnel.

[0024] In this embodiment, effective monitoring of the distribution transformer area and its contents is achieved through the first and second monitoring modules, enabling comprehensive fault monitoring and timely alarms. The first monitoring module includes a power grid fault monitoring unit and a power grid outage monitoring unit. The power grid fault monitoring unit monitors the fault status information of the power grid, while the power grid outage monitoring unit monitors whether the power supply to the distribution transformer area is normal. Both the power grid fault monitoring unit and the power grid outage monitoring unit are connected to the distribution transformer area controller.

[0025] The second monitoring module includes a load identification smart meter and a power outage monitoring unit. The load identification smart meter is used to identify the type of user load on the user branch, and the power outage monitoring unit is used to monitor the power on / off status of the user branch. Both the load identification smart meter and the power outage monitoring unit are connected to the transformer area controller. The second monitoring module is installed in the meter box of the user branch and is used to monitor the user branch.

[0026] The first monitoring module, acting as a sensing terminal, can be installed in the low-voltage outgoing cabinet of the low-voltage distribution room. It supports 3-phase voltage acquisition (acquiring the low-voltage bus voltage of the transformer and the voltage behind the main outgoing switch) and 12-channel current acquisition (acquiring 4 channels of three-phase outgoing current). It uses a supercapacitor to support the transmission of power failure information. The sensing terminal can also be equipped with a branch box short-circuit fault analysis unit and a branch box power quality analysis unit.

[0027] The second monitoring module, the meter box status sensing terminal, is installed in the residential meter box in the power supply well. It supports 12-channel current acquisition (acquisition location is below the resident's inlet switch), 12-channel leakage current acquisition (acquisition location is below the resident's inlet switch), and 3-phase voltage acquisition (acquisition location is below the main switch in the meter box). The supercapacitor supports power failure information transmission. It can be further expanded to support fine-grained electricity consumption behavior acquisition for individual residents, short circuit fault detection, leakage hazard detection, arc fault detection, and power quality detection. It also supports transformer area line impedance analysis.

[0028] In this embodiment, the transformer area controller can be implemented using a computer. By installing a pre-set sensing system on the computer, the types of monitoring data for the transformer area can be expanded, thereby extending fault monitoring to the monitoring of various data, such as data from all outgoing cabinet sensing terminals and meter box sensing terminals within the transformer area. This enables full-state monitoring and diagnosis of the transformer area. The main functions include: automatic identification of transformer area topology, fault location and responsibility determination, line impedance monitoring, abnormal line loss diagnosis and location, power quality monitoring, energy consumption guidance services, power safety level monitoring, high-precision sub-item load forecasting, and demand response capacity assessment, etc. These functions can all be expanded by software on the computer according to the user's actual needs, which is a further optimization direction of this solution and will not be further explained here.

[0029] In this embodiment, the second monitoring module includes voltage, current, and leakage current acquisition units and corresponding microcontrollers. In order to transmit data to the distribution area controller, it supports wireless communication modes such as NB-IoT and 2G to 4G to realize data transmission. At the same time, it is equipped with a supercapacitor backup power supply, which can support continued operation after power failure and realize the active uploading of power outage accident identification results.

[0030] Obviously, the specific implementation of this invention is not limited to the above-described methods. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A fault monitoring system for a distribution radio area, characterized in that: It includes a first monitoring module installed in the distribution radio area and a second monitoring module installed on each user branch in the distribution radio area; the first monitoring module is used to monitor the fault status information of the distribution radio area, and the second monitoring module is used to monitor the fault status of each user branch within the distribution radio area. Both the first monitoring module and the second monitoring module are connected to the area controller, which is connected to the fault alarm device. The fault alarm device is used to send fault reminder information to maintenance personnel or users corresponding to user branches.

2. The fault monitoring system for a distribution radio area as described in claim 1, characterized in that: The fault alarm device includes a user alarm device and an operation and maintenance alarm device. The user alarm device is used to send alarm notifications to users, and the operation and maintenance alarm device is used to send alarms to operation and maintenance personnel.

3. The fault monitoring system for a distribution radio area as described in claim 2, characterized in that: The user alarm includes a user mobile terminal and a GSM module; the substation controller is connected to the user mobile terminal through the GSM module and is used to send substation fault information and / or user branch circuit fault information to the user.

4. The fault monitoring system for a distribution radio area as described in claim 2, characterized in that: The maintenance alarm includes a maintenance server and an IoT module. The area controller is connected to the maintenance server through the IoT module. The maintenance server sends alarm information to the maintenance personnel's terminal through the network or sends alarm information through the monitoring screen.

5. The fault monitoring system for a distribution radio area as described in claim 1, characterized in that: The first monitoring module includes a power grid fault monitoring unit and a power grid power outage monitoring unit. The power grid fault monitoring unit is used to monitor the fault status information of the power grid, and the power grid power outage monitoring unit is used to monitor whether the power supply of the distribution substation is normal. Both the power grid fault monitoring unit and the power grid power outage monitoring unit are connected to the substation controller.

6. The fault monitoring system for a distribution radio area as described in claim 1, characterized in that: The second monitoring module includes a load identification smart meter and a power outage monitoring unit; the load identification smart meter is used to identify the user load type on the user branch, and the power outage monitoring unit is used to monitor the power on / off status of the user branch. The load identification smart meter and the power outage monitoring unit are both connected to the distribution area controller.

7. The fault monitoring system for a distribution radio area as described in claim 1, characterized in that: The second monitoring module is installed in the meter box of the user branch and is used to monitor the user branch.

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