Branch load monitoring device, branch load monitoring method and system for low voltage station area

Abstract

The present invention provides a branch load monitoring device, a branch load monitoring method and a system for a low-voltage substation, comprising: a main control module transmits operating status data to a communication module, and receives control instructions for the operating status data from the communication module; and sends a switch control signal to a remote control module based on the control instruction; the communication module sends the operating status data to an external intelligent device, and receives control instructions for the operating status data sent by the external intelligent device; the remote control module is used to send a switch control signal to an external switch device for controlling the low-voltage branch circuit. In the present invention, the branch load monitoring device establishes an effective control loop through a remote control output interface, and the branch load monitoring device receives remote commands from a terminal device, and realizes multiple rounds of precise load monitoring and control functions according to control requirements. The branch load monitoring device realizes load monitoring and control on the power consumption side, and improves the reliability of distribution network operation.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid load monitoring, and in particular to a branch load monitoring device, a branch load monitoring method and a system for a low-voltage station area. Background Art

[0002] The power system is evolving towards a new power system characterized by "high-transmittance renewable energy and high proportion of power electronic equipment". The distribution network operation mode has changed, and new requirements have been put forward for flexible resource aggregation on the user side and automatic load optimization and regulation. In view of the weak coordination ability of the source, network, load and storage links of the active distribution network dominated by new energy, it is necessary to build a new power load monitoring and management system to achieve accurate monitoring and effective control of load resources, realize the overall improvement of energy utilization and coordinated management and control of the distribution network, and increase the economy and operational reliability of the distribution network.

[0003] At present, the branch load monitoring device in the low-voltage substation can only realize the monitoring function, so it is impossible to realize the load monitoring and control on the power consumption side, resulting in reduced reliability of distribution network operation. Summary of the invention

[0004] In order to overcome the defect that the above-mentioned traditional low-voltage substation branch load monitoring device can only realize the monitoring function but cannot realize the load monitoring and control on the power consumption side, resulting in reduced reliability of distribution network operation, the present invention provides a branch load monitoring device for a low-voltage substation, comprising: a main control module, a metering module, a communication module and a remote signaling and remote control module; the main control module is respectively connected to the metering module, the communication module and the remote signaling and remote control module;

[0005] The metering module is used to collect the operation status data of the low-voltage branch circuit of the low-voltage station area and transmit the operation status data to the main control module;

[0006] The main control module is used to transmit the running status data to the communication module, and receive a control instruction for the running status data from the communication module; and send a switch control signal to the remote control module based on the control instruction;

[0007] The communication module is used to send the running status data to the external intelligent device and receive the control instruction for the running status data sent by the external intelligent device;

[0008] The remote signal and remote control module is used to send the switch control signal to an external switch device to control the low-voltage branch circuit.

[0009] Optionally, the remote signaling and remote control module includes a remote opening unit, a remote closing output unit and a remote signaling unit;

[0010] The remote control opening unit is used to control the opening of the low-voltage branch circuit when the switch control signal is used to control the opening of the low-voltage branch circuit;

[0011] The remote control closing unit is used to control the closing of the low-voltage branch circuit when the switch control signal is used to control the closing of the low-voltage branch circuit;

[0012] The remote signaling unit is used to obtain the open state or closed state of the low-voltage branch circuit.

[0013] Optionally, the metering module includes a voltage transformer, a voltage differential bias circuit, a current transformer, a current differential bias circuit, and a metering chip; the voltage transformer is connected to the low-voltage branch circuit and the voltage differential bias circuit respectively, the current differential bias circuit is connected to the external current transformer, and the metering chip is connected to the voltage differential bias circuit and the current differential bias circuit respectively;

[0014] The current transformer is used to couple the primary-side large current of the low-voltage branch circuit into a secondary-side small current, and input the current signal of the secondary-side small current into the metering chip through the current differential bias circuit;

[0015] The voltage transformer is used to couple the primary side high voltage of the low voltage branch circuit into the secondary side low voltage, and input the voltage signal of the secondary side low voltage into the metering chip through the voltage differential bias circuit;

[0016] The metering chip is used to send the current signal and the voltage signal to the main control module through a serial peripheral interface (Serial Peripheral Interface, SPI) bus.

[0017] Optionally, the communication module includes two RS-485 communication units and one broadband carrier communication unit;

[0018] One RS-485 communication unit is used to receive the control instruction for the operation status data sent by an external fusion terminal or distribution transformer terminal;

[0019] Another RS-485 communication unit is used to receive the upgrade and maintenance information of the communication module sent by an external maintenance device, and to upgrade and maintain the communication module;

[0020] The bandwidth carrier communication unit is used to perform carrier communication with an external carrier communication device.

[0021] Optionally, it further includes: a power supply module, the power supply module includes a main power supply and a backup power supply, the main power supply and the backup power supply are connected;

[0022] The main power supply is used to use the low-voltage branch circuit to power the main control module; and to charge the supercapacitor inside the backup power supply;

[0023] The backup power supply is used to supply power to the main control module when the main power supply is insufficient.

[0024] Optionally, it further includes: a storage module, the storage module is connected to the main control module;

[0025] The storage module is used to receive and store the operating status data of the low-voltage branch circuit sent by the main control module; and store fault events of the low-voltage branch circuit.

[0026] On the other hand, the present invention also provides a branch load monitoring method, comprising:

[0027] Based on real-time multi-threaded operating system, it can execute sampling and measurement tasks and communication tasks simultaneously;

[0028] When executing the sampling and metering task, the operation status data of the low-voltage branch circuit of the low-voltage area is obtained from the metering module, and the low-voltage branch circuit is monitored for abnormalities according to the operation status data;

[0029] When executing the communication task, it is used to send the operating status data to an external intelligent device and receive control instructions for the operating status data sent by the external intelligent device, wherein the control instructions are used to generate a switch control signal for controlling the low-voltage branch circuit.

[0030] Optionally, the simultaneous execution of sampling and metering tasks and communication tasks based on a real-time multi-threaded operating system includes:

[0031] Based on real-time multi-threaded operating system, it can simultaneously execute sampling and metering tasks, communication tasks and topology identification tasks;

[0032] When executing the topology identification task, a topology identification frame is sent and multiple topology identification reply frames are received through the communication module, and other branch load monitoring devices located on the same low-voltage branch circuit as the current branch load monitoring device are determined based on the source address that appears most frequently in the multiple topology identification reply frames.

[0033] Optionally, the real-time multi-threaded operating system includes: an RT-Thread operating system.

[0034] On the other hand, the method also provides a branch load monitoring system for a low voltage area, including a data acquisition layer, a data transmission layer and a data application layer;

[0035] The data collection layer is used to collect the operation status data of the low-voltage branch circuit of the low-voltage station area through the branch load monitoring device;

[0036] The data transmission layer is used to send the operating status data to the external intelligent device through the branch load monitoring device and receive the control instruction for the operating status data; and send the switch control signal to the external switch device based on the control instruction through the branch load monitoring device to control the low-voltage branch circuit;

[0037] The data application layer is used to obtain the operating status data of the low-voltage branch circuit from the external intelligent device, and send the control instruction for the operating status data to the external intelligent device according to the analysis result of the operating status data.

[0038] Optional, specifically used for:

[0039] Based on real-time multi-threaded operating system, it can simultaneously execute sampling and metering tasks, communication tasks and topology identification tasks;

[0040] When executing the topology identification task, a topology identification frame is sent and multiple topology identification reply frames are received through the communication module. Based on the source address that appears most frequently in the multiple topology identification reply frames, other branch load monitoring devices located on the same low-voltage branch circuit as the current branch load monitoring device are determined.

[0041] On the other hand, the present invention also provides an electronic device, comprising: at least one processor and a memory; the memory and the processor are connected via a bus;

[0042] The memory is used to store one or more programs;

[0043] When the one or more programs are executed by the at least one processor, the above-mentioned branch load monitoring method is implemented.

[0044] On the other hand, the present invention also provides a readable storage medium having an execution program stored thereon, and when the execution program is executed, the above-mentioned branch load monitoring method is implemented.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] The present invention provides a branch load monitoring device for a low-voltage substation, comprising a main control module, a metering module, a communication module and a telesignal remote control module; the main control module is connected to the metering module, the communication module and the telesignal remote control module respectively; the metering module collects the operating status data of the low-voltage branch circuit of the low-voltage substation, and transmits the operating status data to the main control module; the main control module transmits the operating status data to the communication module, and receives a control instruction for the operating status data from the communication module; and sends a switch control signal to the telesignal remote control module based on the control instruction; the communication module sends the operating status data to an external intelligent device, and receives a control instruction for the operating status data sent by the external intelligent device; the telesignal remote control module is used to send a switch control signal to an external switch device, which is used to control the low-voltage branch circuit. In the present invention, the branch load monitoring device can establish an effective control loop through a remote control output interface, and can realize multiple rounds of precise load monitoring and control functions through the control instructions of the external intelligent device, thereby improving the reliability of distribution network operation.

[0047] The present invention provides a branch load monitoring method, including executing sampling metering tasks and communication tasks simultaneously based on a real-time multi-threaded operating system; when executing the sampling metering task, obtaining the operating status data of the low-voltage branch circuit of the low-voltage station from the metering module, and performing abnormal monitoring on the low-voltage branch circuit according to the operating status data; when executing the communication task, sending the operating status data to an external intelligent device, and receiving a control instruction for the operating status data sent by the external intelligent device, the control instruction is used to generate a switch control signal for controlling the low-voltage branch circuit. The branch load monitoring method provided by the present invention executes multiple tasks synchronously through a real-time multi-threaded operating system, which can ensure that the branch load monitoring device responds to tasks quickly and works stably, and ensures the orderliness and scalability of branch load monitoring.

[0048] The present invention provides a branch load monitoring system for a low-voltage substation, including a data acquisition layer, a data transmission layer and a data application layer; the data acquisition layer is used to collect the operating status data of the low-voltage branch circuit of the low-voltage substation through a branch load monitoring device; the data transmission layer is used to send the operating status data to an external intelligent device through the branch load monitoring device, and receive control instructions for the operating status data; and the branch load monitoring device sends a switch control signal to an external switch device based on the control instruction to control the low-voltage branch circuit; the data application layer is used to obtain the operating status data of the low-voltage branch circuit from the external intelligent device, and send the control instruction for the operating status data to the external intelligent device according to the analysis result of the operating status data. The branch load monitoring system can realize the integration of online monitoring and management, and realize the unified network management of branch load information, can support the operation of demand-side load resource management, and realize the precise measurement and orderly control of the load on the power consumption side. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the structure of the branch load monitoring device of the low voltage station area of ​​the present invention;

[0050] Figure 2 It is a schematic diagram of the principle of the metering module of the present invention;

[0051] Figure 3 It is a schematic diagram of the principle of the power module of the present invention;

[0052] Figure 4 It is a detailed structural schematic diagram of the branch load monitoring device of the present invention;

[0053] Figure 5 It is a schematic diagram of the flow of the branch load monitoring method of the present invention;

[0054] Figure 6 It is a schematic diagram of a flow chart of executing a communication task of the present invention;

[0055] Figure 7 It is a schematic diagram of the flow chart of executing topology tasks of the present invention;

[0056] Figure 8 It is a schematic diagram of the execution initialization task flow chart of the present invention;

[0057] Fig. 9 Detailed structural diagram of the branch load monitoring system for the low voltage area of ​​the present invention

[0058] Fig.10 It is a structural schematic diagram of the branch load monitoring system of the present invention;

[0059] Fig.11 It is a schematic structural diagram of the electronic device of the present invention. DETAILED DESCRIPTION

[0060] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0061] Embodiment 1:

[0062] The present invention provides a branch load monitoring device for a low voltage station area, the schematic diagram of the device structure is as follows Figure 1 As shown, including:

[0063] The main control module 101, the metering module 102, the communication module 103 and the remote control module 104; the main control module 101 is connected to the metering module 102, the communication module 103 and the remote control module 104 respectively;

[0064] The metering module 102 is used to collect the operation status data of the low-voltage branch circuit of the low-voltage station area and transmit the operation status data to the main control module 101;

[0065] The main control module 101 is used to transmit the operation status data to the communication module 103, and receive the control instruction for the operation status data from the communication module 103; and send the switch control signal to the remote control module 104 based on the control instruction;

[0066] The communication module 103 is used to send the operation status data to the external intelligent device and receive the control instructions for the operation status data sent by the external intelligent device;

[0067] The remote signaling and remote control module 104 is used to send a switch control signal to an external switch device for controlling the low-voltage branch circuit.

[0068] The traditional branch load monitoring device can only realize the monitoring function, while the branch load monitoring device of the low-voltage substation proposed in the present invention realizes that the branch (sub-meter) load can be controlled and monitored. In order to realize the charge monitoring and control on the electricity consumption side, the metering module in the present invention collects the operating status data of the low-voltage branch circuit of the low-voltage substation, wherein the operating status data includes voltage signals, current signals, etc. After collecting the operating status data, the metering module transmits the operating status data to the connected main control module. The metering module used in the present invention can be a three-phase voltage and current sampling metering module.

[0069] The main control module can be a microcontroller unit (MCU) main control module, which can also be called an MCU main control chip, and the main control module is the main processor of the device, which can be STMicroelectronics' STM32L071CBT6, and its FALSH has 128K bytes, which meets the space required for operating system transplantation. After receiving the running status data, the main control module transmits the running status data to the communication module. The main control module also receives control instructions for the running status data from the communication module. The control instructions can be a series of accurate and effective instructions generated by the external intelligent device based on the real-time analysis of the running status data, combined with preset algorithms and rules. These instructions may include various types of operations such as start, stop, adjust, and optimize, and are sent by the external intelligent device to the communication module, and the communication module sends them to the main control module. The main control module also sends a switch control signal to the remote control module based on the control, and controls the low-voltage branch circuit through the switch control signal.

[0070] The communication module sends the received running status data to the external intelligent device, and the external intelligent device determines a control instruction according to the running status data and sends the control instruction to the communication module, and the communication module can return the control instruction to the main control module.

[0071] The branch load monitoring device is suitable for low-voltage areas, that is, low-voltage power supply systems.

[0072] Compared with the traditional low-voltage substation branch load monitoring device, the embodiment of the present invention adopts a low-voltage substation branch load monitoring device including a main control module, a metering module, a communication module and a telesignaling and remote control module. The low-voltage substation branch load monitoring device is widely used in low-voltage power supply systems. It is a secondary device that integrates functions such as collection, monitoring, control, fault alarm, and communication. It helps to realize the load control function under orderly power consumption and the normalized demand-side management function in the construction of a new type of power load monitoring and management system, realize accurate monitoring and effective control of load resources, comprehensively improve the load management capability, and realize accurate control of the load on the power consumption side. The branch load monitoring device can realize accurate control of the load on the power consumption side, support the orderly power consumption function, and thus realize active intelligent operation and maintenance on the secondary side of the power grid, that is, the branch load monitoring device realizes load monitoring and control on the power consumption side, and improves the reliability of distribution network operation.

[0073] The branch load monitoring device is mainly installed on the user branch side of the low-voltage distribution network. It has the characteristics of high integration, flexible configuration, and non-stop installation. It can realize the monitoring function of the operating status and power of the low-voltage branch line, and realize the detection, analysis, indication and alarm functions of the fault status of the low-voltage line, quickly determine the low-voltage fault information and fault cause, and identify the fault type of the line.

[0074] In order to control the low-voltage branch circuit, based on the above embodiments, in the present invention, the remote signaling and remote control module 104 includes a remote control opening unit, a remote control closing output unit and a remote signaling unit;

[0075] A remote control opening unit, used for opening the low-voltage branch circuit when the switch control signal is used to control the low-voltage branch circuit to be opened;

[0076] A remote control closing unit, used for controlling the closing of the low-voltage branch circuit when the switch control signal is used to control the closing of the low-voltage branch circuit;

[0077] Remote signal interface, used to obtain the open or closed state of the low-voltage branch circuit.

[0078] In order to control the low-voltage branch circuit, in the remote signal remote control module, the remote control opening unit can output the opening control signal to control the opening action of the external switch, that is, the low-voltage branch circuit. When the external switch is opened successfully, the opening position information will be notified to the remote signal module. The remote control opening unit can output the closing control signal to control the closing action of the external switch, that is, the low-voltage branch circuit. When the external switch is closed successfully, the closing position information will be notified to the remote signal module. After the successful opening, the low-voltage branch circuit will stop its normal function and no longer provide power to the connected electrical equipment; and the remote control closing operation will enable the low-voltage branch circuit that was originally in a disconnected state to re-establish the current path, so that electrical energy can be transmitted and used.

[0079] For example, the remote signal remote control module can include 1 remote control opening output (normally open, normally closed), 1 remote control closing output (normally open), and 4 remote signal access interface functions. The remote control output adopts a passive node mode, and each contact has two modes: normally open and normally closed. Among them, the remote control opening output adopts a passive node mode, and each contact has two modes: normally open and normally closed. The remote signal interface adopts a passive node mode. When the external contact connected to the remote signal terminal is closed, it means that the remote signal level is valid. When the external contact is disconnected, the remote signal level is invalid.

[0080] In order to obtain the operation status data, based on the above embodiments, in the present invention, the metering module includes a voltage transformer, a voltage differential bias circuit, a current transformer, a current differential bias circuit, and a metering chip; the voltage transformer is connected to the low-voltage branch circuit and the voltage differential bias circuit respectively, the current differential bias circuit is connected to the external current transformer, and the metering chip is connected to the voltage differential bias circuit and the current differential bias circuit respectively;

[0081] A current transformer is used to couple the primary-side large current of the low-voltage branch circuit into a secondary-side small current, and input the current signal of the secondary-side small current into the metering chip through a current differential bias circuit;

[0082] A voltage transformer is used to couple the primary side high voltage of the low voltage branch circuit into the secondary side low voltage, and input the voltage signal of the secondary side low voltage into the metering chip through the voltage differential bias circuit;

[0083] The metering chip is used to send the current signal and voltage signal to the main control module through the SPI bus.

[0084] In the present invention, the current transformer of the metering module couples the primary side large current of the low voltage branch circuit into the secondary side small current. Specifically, how the current transformer couples the primary side large current into the secondary side small current is a prior art and will not be repeated here. In addition, the current transformer inputs the current signal of the secondary small current into the metering chip of the metering module through the current detection bias circuit of the metering module. The metering chip can be the mature ATT7022E metering chip, which can meet the accuracy of 0.5 level.

[0085] The voltage transformer of the metering module couples the large primary voltage of the low-voltage branch circuit into a small secondary voltage. Specifically, how the voltage transformer couples the large primary voltage into a small secondary voltage is prior art and will not be elaborated here. Moreover, the voltage transformer inputs the voltage signal of the secondary small voltage into the metering chip of the metering module through the voltage detection bias circuit of the metering module.

[0086] After acquiring the current signal of the secondary side small current and the voltage signal of the secondary side small voltage, the metering chip sends the current signal and the voltage signal to the main control module through the SPI bus.

[0087] The schematic diagram of the metering module is shown below. Figure 2 shown.

[0088] Figure 2 The metering module shown is a three-phase voltage and three-phase load current sampling metering module.

[0089] Depend on Figure 2 It can be seen that current sampling couples large current into small current on the secondary side through an external current transformer (CT); voltage acquisition uses a built-in potential transformer (PT), which is safe, reliable and has high accuracy. After passing through the differential bias circuit, the voltage channel and current channel of the metering chip are input respectively. Among them, the metering chip and MCU (i.e., the main control module) use SPI bus communication, which has high communication rate, reliability and stability. Among them, Figure 2 Among them, ABC represents three-phase electricity of phase A, phase B and phase C, N represents the neutral line, VA+ and VA- represent the voltage of phase A, VB+ and VB- represent the voltage of phase B, VC+ and VC- represent the voltage of phase C, IA+ and IA- represent the current of phase A, IB+ and IB- represent the current of phase B, and IC+ and IC- represent the current of phase C.

[0090] In order to achieve communication accurately and effectively, based on the above embodiments, in the present invention, the communication module 103 includes two RS-485 communication units and one broadband carrier communication unit;

[0091] One RS-485 communication unit is used to receive control instructions for operation status data sent by an external fusion terminal or distribution transformer terminal;

[0092] Another RS-485 communication unit is used to receive the upgrade and maintenance information of the communication module sent by the external maintenance equipment, and to upgrade and maintain the communication module;

[0093] One-channel broadband carrier communication unit is used for carrier communication with external carrier communication equipment.

[0094] In the present invention, the communication module includes two RS-485 communication units and one broadband carrier (Power Line Communication, HPLC) communication unit, and one RS-485 communication unit receives the control instructions for the operation status data sent by the external fusion terminal or the distribution transformer terminal. The maintenance personnel can operate the maintenance terminal to make the maintenance terminal send the upgrade maintenance information. That is, the RS-485 communication unit of the road is the local maintenance port by default, and local upgrade and maintenance can be performed. After receiving the upgrade maintenance information, the other RS-485 communication unit of the communication module will perform corresponding upgrade maintenance operations on the communication module according to the upgrade maintenance information, such as updating the software version, optimizing the algorithm logic, repairing known problems, etc., so as to continuously improve its performance and stability. The other RS-485 is an external intelligent device port. When the sensor device is connected, it supports transparent forwarding of data. When the smart meter is connected, it can automatically retrieve all the meters hanging under it, and monitor the status of the meter in real time, and alarm in time when abnormalities are found; when the intelligent fusion terminal or the intelligent distribution transformer terminal is connected, it is used to monitor the operating status of the branch switch and control the opening and closing of the branch switch at the same time.

[0095] The speed of the two RS-485 communication units can be set to support 1200bps, 2400bps, 4800bps, 9600bps, and support the standard MODBUS_RTU communication protocol.

[0096] One broadband carrier communication unit of the communication module performs carrier communication with an external carrier communication device. The communication function of the broadband carrier communication unit meets the requirements of broadband carrier in Q / GDW 1374.3-2012.

[0097] In order to supply power to the main control module, on the basis of the above embodiments, the present invention further includes: a power supply module 105, the power supply module includes a main power supply and a backup power supply, the main power supply and the backup power supply are connected;

[0098] The main power supply is used to use a low-voltage branch circuit to power the main control module and to charge the supercapacitor inside the backup power supply;

[0099] The backup power supply is used to supply power to the main control module when the main power supply is insufficient.

[0100] The branch load monitoring device in the present invention also includes a power module, which includes a main power supply. The main power supply can use a low-voltage branch circuit to power the main control module. Specifically, the main power supply can use a three-phase four-wire AC power supply. The main power supply can also charge the supercapacitor inside the backup power supply. The charging voltage and charging current of the supercapacitor can be adjusted by external devices to achieve voltage and current limiting, thereby increasing the service life of the supercapacitor.

[0101] Specifically, the AC220V / 50Hz main power supply can continue to operate when a phase is lost. It is converted into DC12V through the transformer and rectifier bridge, and then into DC3.6V through the power module, which is used to power the device (that is, to power the main control module) and also to charge the supercapacitor.

[0102] The power supply module also includes a backup power supply, which is an internally integrated backup power supply using a super capacitor and supplies power to the main control module when the main power supply is insufficient.

[0103] The power module schematic diagram is shown below. Figure 3 shown.

[0104] The main power supply of alternating current (AC, Alternating Current) 220V / 50Hz is converted into direct current (DC, Direct Current) 12V through a transformer and a rectifier bridge, and then gets DC3.6V through a power module, which is used to power the device and also charges the supercapacitor. When the MCU detects that the DC3.3V voltage is stable, it turns on the charging switch. When the MCU detects that the supercapacitor voltage reaches the charging voltage, it turns off the charging switch after a delay to stop charging. When the main power supply is supplying normally, DC3.6V is higher than the supercapacitor voltage, and DC3.6V supplies power after passing through a diode; when the main power supply is insufficient or disappears, the supercapacitor is boosted by the DCDC boost circuit (direct boost circuit) and the voltage is stabilized and the output power is supplied, and the backup power supply is automatically and seamlessly put into use to maintain normal operation.

[0105] In order to realize the storage of information, on the basis of the above embodiments, the present invention further includes: a storage module 106, the storage module 106 is connected to the main control module 101;

[0106] The storage module 106 is used to receive and store the operation status data of the low-voltage branch circuit sent by the main control module; and store the fault events of the low-voltage branch circuit.

[0107] The branch charge monitoring device in the present invention also includes a storage module, which is connected to the main control module. The storage module can adopt the Ferroelectric AT45DB321D-SU, with a storage capacity of 4M bytes, and communicates with the MCU using the SPI bus. The storage module receives and stores the operating status data of the low-voltage branch circuit sent by the main control module, and the operating status data includes the total active electric energy in the forward and reverse directions, and the phase voltage / current / active power / reactive power. The storage module also stores the fault events of the low-voltage branch circuit. The fault events include phase overvoltage / undervoltage / voltage / no voltage, phase loss, power outage and power restoration, phase overcurrent / overload, short circuit fault, etc. The storage module freezes the operating status data to be stored and the fault events of the low-voltage branch circuit on the spot.

[0108] The detailed structural diagram of the branch load monitoring device is shown in the following Figure 4 shown.

[0109] Depend on Figure 4 It can be known that the current transformer in the low-voltage branch line inputs the voltage signal and the current signal to the metering module of the branch load monitoring device and supplies power to the power module of the branch load monitoring device.

[0110] The single branch load monitoring device adopts modular design, mainly composed of the main control module (i.e. Figure 4 The shunt load monitoring device can be connected to the upper-level intelligent fusion terminal or intelligent distribution terminal through one RS-485 communication unit of the communication module, the local operation and maintenance equipment and carrier communication equipment or the next-level intelligent meter equipment through another RS-485 communication unit, and the external carrier communication equipment through the broadband carrier communication unit. And the power module includes the main power supply and the backup power supply. And the remote control module communicates with the switch equipment.

[0111] The single branch load monitoring device in the present invention adopts a modular design, and is mainly composed of a main control module, a power module, a metering module, a storage module, a communication module, and a remote control module. The low-voltage substation branch load monitoring device of the present invention is widely used in low-voltage power supply systems, and is a secondary device that integrates functions such as collection, monitoring, control, fault alarm, and communication. The low-voltage substation branch load monitoring system mentioned in the present invention is helpful to realize the load control function under orderly power consumption and the normalized demand-side management function in the construction of a new type of power load monitoring and management system, realize accurate monitoring and effective control of load resources, comprehensively improve the load management capabilities, and realize accurate control of the load on the power consumption side.

[0112] Embodiment 2:

[0113] The present invention provides a branch load monitoring method, the flow chart of which is as follows: Figure 5 As shown, including:

[0114] Step 501: Based on a real-time multi-threaded operating system, simultaneously executing sampling and metering tasks and communication tasks;

[0115] Step 502: when executing the sampling metering task, the operation status data of the low-voltage branch circuit of the low-voltage area is obtained from the metering module, and the low-voltage branch circuit is monitored for abnormalities according to the operation status data;

[0116] Step 503: when executing the communication task, it is used to send the operation status data to the external intelligent device and receive the control instruction for the operation status data sent by the external intelligent device, the control instruction is used to generate the switch control signal for controlling the low voltage branch circuit.

[0117] In the present invention, based on a real-time multi-threaded operating system, sampling and metering tasks and communication tasks are executed simultaneously.

[0118] Among them, the sampling and metering task refers to the main control chip continuously reading the corresponding registers of the metering chip through SPI and performing simple processing to obtain the value of the corresponding power parameter, and then setting the parameter threshold according to the software to judge and process its working status. When an abnormality is detected, an alarm message is immediately generated, the operating parameters are uploaded within the specified time, and the power parameters are stored and recorded locally.

[0119] The communication task can also be a MODBUS (a serial communication protocol) communication task, which refers to the device and the external intelligent fusion terminal or intelligent distribution terminal establishing a connection through the serial port based on the MODBUS communication protocol to achieve two-way communication. This is a half-duplex communication method using an asynchronous "master-slave" mode. The intelligent low-voltage branch monitoring device is used as a slave device, and the intelligent fusion terminal or intelligent distribution terminal is used as the master device. The address and communication configuration of the slave device are variable, and a "one-response-one-answer" mechanism is adopted. The master device sends data frames to create and disconnect the communication link.

[0120] When performing the sampling and metering task, the operating status data of the low-voltage branch circuit of the low-voltage station area is obtained from the metering module described in the above embodiment, and the low-voltage branch circuit is monitored for abnormalities based on the operating status data. In one implementation, an acceleration sensor can be installed inside the low-voltage branch circuit to monitor the corresponding vibration frequency and amplitude, and the vibration signal can be analyzed in combination with a pattern recognition algorithm to determine whether there is an abnormality.

[0121] When executing the communication task, the operation status data is sent to the external intelligent device, and the control instruction for the operation status data sent by the external intelligent device is received, and the control instruction is used to generate a switch control signal for controlling the low-voltage branch circuit.

[0122] For the communication task flow chart, see the following Figure 6 shown.

[0123] Depend on Figure 6It can be seen that the MODBUS interrupt entry can be used first to determine whether the 3.5 character time has arrived. If the 3.5 time character has arrived, the first byte of data of the frame is received, and the 3.5 and 1.5 time characters are cleared. If the 3.5 character time has not arrived, the 1.5 time is determined to be arrived. If the 1.5 time character has not arrived, it is determined whether the first byte of data has been received. If the first byte of data has not been received, or if the 1.5 time character has arrived, the invalid flag is set to continue receiving data, and the 3.5 and 1.5 time characters are cleared. If the first byte of data has been received, the data of the current frame is continued to be received, and the 3.5 and 1.5 time characters are cleared. After clearing the 3.5 and 1.5 time characters, the MODBUS interrupt returns.

[0124] In order to accurately perform the tasks, based on the above embodiments, in the present invention, based on a real-time multi-threaded operating system, the simultaneous execution of the sampling and metering tasks and the communication tasks includes:

[0125] Based on real-time multi-threaded operating system, it can simultaneously execute sampling and metering tasks, communication tasks and topology identification tasks;

[0126] When executing the topology identification task, a topology identification frame is sent and multiple topology identification reply frames are received through the communication module. Based on the source address that appears most frequently in the multiple topology identification reply frames, other branch load monitoring devices located on the same low-voltage branch circuit as the current branch load monitoring device are determined.

[0127] In the above step 101, when executing tasks, based on the real-time multi-threaded operating system, the sampling and metering tasks, the communication tasks and the topology identification tasks are executed simultaneously;

[0128] When performing a topology identification task, a topology identification frame is sent through the communication module described in the above embodiment, wherein a preset number of topology identification frames can be sent, for example, 3 topology identification frames can be sent, and the topology identification frame contains specific identification information for requesting a response with other monitoring devices. When other monitoring devices receive the topology identification frame, they will generate a topology identification reply frame based on their own source address and send it back to the current shunt load monitoring device. The current device obtains multiple topology identification reply frames received within a preset event segment after sending the topology identification frame, and obtains the source address that appears most frequently in the multiple topology identification reply frames. The device corresponding to the source address that appears most frequently can be determined as another shunt load monitoring device located on the same low-voltage branch circuit as the current shunt load monitoring device.

[0129] Among them, the topology identification task can be initialized first, which is TaskToPoInit(), and the topology identification process TaskToPoProce(). The topology identification process can be started by power-on or by communication control. The topology identification result is a 12-byte upper-level device address, that is, the source address of other branch load monitoring devices located on the same low-voltage branch circuit as the current branch load monitoring device.

[0130] For the flowchart of executing topology tasks, see the following Figure 7 shown.

[0131] Depend on Figure 7 It can be seen that you can first query whether the topology task identification is completed. If completed, the topology identification result is returned. If not completed, the topology identification is started, and when the power is turned on, the power-on initialization is performed. After the power-on initialization, that is, the topology identification is started, the transmission power is 0, the frame number is 0, the topology identification frame is sent, and wait for 0.5*6 seconds to collect the reply.

[0132] And determine whether the number of transmissions is greater than 3. If not, increase the frame number and re-execute the step of sending the topology identification frame. If the number of transmissions is greater than 3, the topology identification reply frame can be analyzed. If the number of reply frames is greater than 0, extract the source address that appears most times in the reply frame, and the topology identification is successful, and the topology identification ends; if the number of reply frames is 0, determine whether the transmission power is greater than 28. If it is greater than 28, determine that the topology fails and end the topology. If the transmission power is not greater than 28, then the transmission power + preset value, for example, the preset value can be 4, and increase the frame requirement, and re-execute the step of sending the topology identification frame.

[0133] In one implementation, the idle task and the initialization task can also be executed at the same time. When executing the idle task, an RT-Thread idle task thread can be created and the priority can be set to the lowest. The initialization tasks include main thread entry(), main thread startup rtthread_startup(), operating system preliminary configuration rt_application_init(), main thread entry function main_thread_entry(), and user main(). rtthread_startup() includes initializing system-related hardware. Initializing system-related hardware includes system clock initialization, timer initialization, parameter initialization, peripheral FLASH parameters, serial port, GPIO, etc., initializing system kernel objects, initializing system device framework, initializing each application thread and enabling the scheduler.

[0134] See the following for the flowchart of executing the initialization task. Figure 8 shown.

[0135] Depend on Figure 8It can be seen that when executing the initialization task, it can be started in the following order: main thread entry(), main thread startup rtthread_startup(), hardware board-level initialization rt_hw_board_init(), display of RT-Thread operating system version information rt_show_version(), operating system preliminary configuration rt_application_init(), main thread entry function main_thread_entry(), user main().

[0136] Among them, the real-time multi-threaded operating system in the present invention includes: RT-Thread operating system.

[0137] RT-Thread is an open-source embedded real-time multi-threaded operating system with the characteristics of low cost, low power consumption, fast startup, high real-time performance, and small resource usage. It is suitable for various resource-constrained occasions (such as cost and power consumption constraints). RT-Thread supports multiple tasks running simultaneously. Tasks are implemented through threads, and the thread scheduler is also the task scheduler.

[0138] The software design of the present invention adopts RT-Thread-based system development and multi-task synchronous execution to ensure that the device responds to tasks quickly and works stably. By using the operating system to manage each task, the project can be organized and scalable. Multi-threaded creation based on the RT-Thread system mainly includes idle tasks, initialization tasks, sampling and metering tasks, topology identification tasks, and MODBUS communication tasks.

[0139] Compared with the existing technology, the present invention follows modular technology, multi-threaded operation based on RT-Thread embedded operating system, and the uplink communication channel can be expanded to connect to the online monitoring management platform. Traditional monitoring devices do not have real-time operating systems. The present invention is based on: RT-Thread operating system, adopts RT-Thread-based system development, and multi-task synchronous execution to ensure that the device responds to tasks quickly and works stably.

[0140] Embodiment 3:

[0141] The present invention provides a branch load monitoring system for a low-voltage area, comprising a data acquisition layer, a data transmission layer 9 and a data application layer;

[0142] The data collection layer is used to collect the operation status data of the low-voltage branch circuits in the low-voltage area through the branch load monitoring device;

[0143] The data transmission layer is used to send the operation status data to the external intelligent device through the branch load monitoring device and receive the control instructions for the operation status data; and send the switch control signal to the external switch device based on the control instruction through the branch load monitoring device to control the low-voltage branch circuit;

[0144] The data application layer is used to obtain the operating status data of the low-voltage branch circuit from the external intelligent device, and send control instructions for the operating status data to the external intelligent device based on the analysis results of the operating status data.

[0145] In the present invention, the data collection layer collects the operating status data of the low-voltage branch circuit of the low-voltage substation through the branch load monitoring device, wherein how the branch load monitoring device collects the operating status data of the low-voltage branch circuit of the low-voltage substation has been described in the above embodiment and will not be repeated here. Among them, the data collection layer is mainly responsible for completing the real-time data collection work by the branch load monitoring device installed on the low-voltage user load branch line.

[0146] The data transmission layer of the branch load monitoring system sends the operating status data to the external intelligent device through the branch load monitoring device, and receives the control instructions for the operating status data sent by the external intelligent device. The data transmission layer also sends a switch control signal to the external switch device based on the control instruction through the branch load monitoring device, and controls the low-voltage branch circuit through the switch control signal.

[0147] The data transmission layer belongs to the middle layer. The branch load monitoring device and the user load switch (i.e., the external switch device) establish an effective control loop through the remote signal input and remote control output interface. The branch load monitoring device establishes communication with the intelligent fusion terminal or the intelligent distribution transformer terminal through RS-485, obtains monitoring information through the bus, remotely and uniformly issues the control requirements of each branch circuit, and monitors the execution results, realizing multiple rounds of precise load monitoring and control functions, and realizing active intelligent operation and maintenance on the secondary side of the power grid.

[0148] The data application layer obtains the operation status data of the low-voltage branch circuit from the external intelligent device. The data application layer is mainly composed of a cloud platform and a front-end visual real-time monitoring interface. The data application layer also parses the operation status data, where the operation status data usually includes various data generated by the low-voltage branch circuit during operation, which reflects its current working status, performance, and possible problems. By analyzing these data in real time or quasi-real time, a large amount of valuable information can be obtained, providing an important basis for decision support, fault warning, performance optimization, etc. The data application layer can send control instructions for the operation status data to the external intelligent device based on the analysis results. Such instructions can be used to control the opening or closing of the external intelligent device. For example, when an abnormal state is detected, the data application layer can send a stop instruction to prevent further damage to the device; when the state is normal, a start instruction can be sent to restore normal operation.

[0149] Among them, the intelligent fusion terminal or intelligent distribution transformer terminal communicates with the power load monitoring platform through wired / wireless communication, and establishes a master station communication and collaborative computing channel for core data flows such as load data monitoring upload, load control command issuance, and load event active reporting. The cloud platform parses and stores the uploaded operating status information. The front-end page obtains the information saved by the cloud platform and displays it, and pushes messages when faults and abnormalities occur, realizing unified management of monitoring equipment.

[0150] Among them, the uplink communication channel of the branch load monitoring device can be connected to the online monitoring management platform by connecting to the terminal equipment, realizing the integration of online monitoring and management, unified network management of branch load information, branch load online management effect analysis, important information alarm and other functions.

[0151] The data interaction between the power load platform and the branch load device uses the intelligent fusion terminal or the intelligent distribution transformer terminal as the transmission medium. The effective cooperation of the three can realize the power supply information collection of the distribution station area, the hierarchical and classified online monitoring of various important loads, equipment status monitoring and communication networking, local analysis and decision-making, power grid network topology, fault point analysis and prediction and other functions, support the operation of demand-side load resource management, and realize accurate measurement and orderly control of power consumption side load.

[0152] The uplink communication channel in the present invention can be extended to connect to the online monitoring management platform to form a branch load monitoring system. The uplink communication channel of the branch load monitoring device can be extended to connect to the online monitoring management platform by connecting to the terminal equipment, thereby realizing the integration of online monitoring and management, and realizing unified network management of branch load information, analysis of branch load online management effects, important information alarm and other functions.

[0153] The detailed structural diagram of the branch load monitoring system in the low voltage area is shown below. Fig. 9 shown.

[0154] Depend on Fig. 9 It can be seen that the branch load monitoring device and the user load switch establish an effective control loop through the remote signal input and remote control output interface. The branch load monitoring device establishes communication with the intelligent fusion terminal or intelligent distribution terminal through RS-485 and obtains monitoring information through the bus. The intelligent fusion terminal or intelligent distribution terminal communicates with the power load monitoring platform through wired / wireless communication. Fig. 9 In the process, the uplink communication channel can be expanded to connect to the online monitoring and management platform to form a branch load monitoring system. By connecting to the online monitoring and management platform, accurate load control on the power consumption side can be achieved, and orderly power consumption functions can be supported to realize active intelligent operation and maintenance on the secondary side of the power grid.

[0155] Embodiment 4:

[0156] Based on the same inventive concept, the present invention also provides a branch load monitoring system, the structural diagram of which is shown in FIG. Fig.10 As shown, including:

[0157] An execution module, used for executing sampling and metering tasks and communication tasks simultaneously based on a real-time multi-threaded operating system;

[0158] The acquisition monitoring module is used to obtain the operation status data of the low-voltage branch circuit of the low-voltage area from the metering module when performing the sampling metering task, and perform abnormal monitoring on the low-voltage branch circuit according to the operation status data;

[0159] The processing module is used to send the operation status data to the external intelligent device and receive the control instructions for the operation status data sent by the external intelligent device when executing the communication task. The control instructions are used to generate a switch control signal for controlling the low-voltage branch circuit.

[0160] In a possible implementation, the execution module is specifically configured to:

[0161] Based on real-time multi-threaded operating system, it can simultaneously execute sampling and metering tasks, communication tasks and topology identification tasks;

[0162] When executing the topology identification task, a topology identification frame is sent and multiple topology identification reply frames are received through the communication module. Based on the source address that appears most frequently in the multiple topology identification reply frames, other branch load monitoring devices located on the same low-voltage branch circuit as the current branch load monitoring device are determined.

[0163] Embodiment 5:

[0164] like Fig.11As shown, the present invention also provides an electronic device, which may be a computer device, a single-chip device, an intelligent mobile device, etc. The electronic device in this embodiment may include a processor, a memory, a transceiver component, etc. The memory, the processor, and the transceiver component are connected via a bus; the memory may be used to store an execution program, and an exemplary execution program may include instructions; the processor is used to execute the instructions stored in the memory. The memory may also be used to store data, which may be called and / or modified when the instructions are executed.

[0165] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in a storage medium to implement the corresponding method flow or corresponding functions, so as to implement the steps of a branch load monitoring method in the above embodiment.

[0166] Embodiment 6:

[0167] Based on the same inventive concept, the present invention also provides a readable storage medium, specifically an electronic device readable storage medium (Memory), which is a memory device in the electronic device for storing programs and data. It can be understood that the storage medium here can include both the built-in storage medium in the electronic device and the extended storage medium supported by the electronic device. The storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor loads and executes one or more instructions stored in the storage medium, which can implement the steps of a branch load monitoring method in the above embodiment.

[0168] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0169] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0170] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0171] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0172] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the invention.

Claims

1. A branch load monitoring device for a low voltage station, characterized in that: include: A main control module, a metering module, a communication module and a remote control module; the main control module is connected to the metering module, the communication module and the remote control module respectively; The metering module is used to collect the operation status data of the low-voltage branch circuit of the low-voltage station area and transmit the operation status data to the main control module; The main control module is used to transmit the running status data to the communication module, and receive a control instruction for the running status data from the communication module; and send a switch control signal to the remote control module based on the control instruction; The communication module is used to send the running status data to the external intelligent device and receive the control instruction for the running status data sent by the external intelligent device; The remote signal and remote control module is used to send the switch control signal to the external switch device to control the low-voltage branch circuit; The main control module is specifically used for: Based on real-time multi-threaded operating system, it can simultaneously execute sampling and metering tasks, communication tasks and topology identification tasks; When executing the sampling and metering task, the operation status data of the low-voltage branch circuit of the low-voltage area is obtained from the metering module, and the low-voltage branch circuit is monitored for abnormalities according to the operation status data; When executing the communication task, it is used to send the operating status data to the external intelligent device and receive the control instructions for the operating status data sent by the external intelligent device, wherein the control instructions are used to generate a switch control signal for controlling the low-voltage branch circuit; When executing the topology identification task, a topology identification frame is sent through the communication module and multiple topology identification reply frames are received, and other branch load monitoring devices located on the same low-voltage branch circuit as the current branch load monitoring device are determined based on the source address that appears most frequently in the multiple topology identification reply frames; The remote signaling and remote control module includes a remote opening unit, a remote closing output unit and a remote signaling unit; The remote control opening unit is used to control the opening of the low-voltage branch circuit when the switch control signal is used to control the opening of the low-voltage branch circuit; The remote control closing output unit is used to control the closing of the low-voltage branch circuit when the switch control signal is used to control the closing of the low-voltage branch circuit; The remote signaling unit is used to obtain the open state or closed state of the low-voltage branch circuit; The metering module includes a voltage transformer, a voltage differential bias circuit, a current transformer, a current differential bias circuit, and a metering chip; the voltage transformer is connected to the low-voltage branch circuit and the voltage differential bias circuit respectively, the current differential bias circuit is connected to the external current transformer, and the metering chip is connected to the voltage differential bias circuit and the current differential bias circuit respectively; The current transformer is used to couple the primary-side large current of the low-voltage branch circuit into a secondary-side small current, and input the current signal of the secondary-side small current into the metering chip through the current differential bias circuit; The voltage transformer is used to couple the primary side high voltage of the low voltage branch circuit into the secondary side low voltage, and input the voltage signal of the secondary side low voltage into the metering chip through the voltage differential bias circuit; The metering chip is used to send the current signal and the voltage signal to the main control module via the SPI bus.

2. The device according to claim 1, characterized in that The communication module includes two RS-485 communication units and one broadband carrier communication unit; One RS-485 communication unit is used to receive the control instruction for the operation status data sent by an external fusion terminal or distribution transformer terminal; Another RS-485 communication unit is used to receive the upgrade and maintenance information of the communication module sent by an external maintenance device, and to upgrade and maintain the communication module; The bandwidth carrier communication unit is used to perform carrier communication with an external carrier communication device.

3. The device according to claim 1, characterized in that Also includes: A power supply module, wherein the power supply module includes a main power supply and a backup power supply, and the main power supply and the backup power supply are connected; The main power supply is used to use the low-voltage branch circuit to supply power to the main control module; and charging the supercapacitor inside the backup power supply; The backup power supply is used to supply power to the main control module when the main power supply is insufficient.

4. The device according to claim 1, characterized in that Also includes: A storage module, wherein the storage module is connected to the main control module; The storage module is used to receive and store the operation status data of the low-voltage branch circuit sent by the main control module; and storing a fault event of the low voltage branch circuit.

5. A branch load monitoring method, characterized in that: A branch load monitoring device for a low voltage station area according to any one of claims 1 to 4, the method comprising: Based on real-time multi-threaded operating system, it can simultaneously execute sampling and metering tasks, communication tasks and topology identification tasks; When executing the sampling and metering task, the operation status data of the low-voltage branch circuit of the low-voltage area is obtained from the metering module, and the low-voltage branch circuit is monitored for abnormalities according to the operation status data; When executing the communication task, it is used to send the operating status data to the external intelligent device and receive the control instructions for the operating status data sent by the external intelligent device, wherein the control instructions are used to generate a switch control signal for controlling the low-voltage branch circuit; When executing the topology identification task, a topology identification frame is sent and multiple topology identification reply frames are received through the communication module. Based on the source address that appears most frequently in the multiple topology identification reply frames, other branch load monitoring devices located on the same low-voltage branch circuit as the current branch load monitoring device are determined.

6. A branch load monitoring system for low voltage areas, characterized in that: A branch load monitoring device for a low voltage station area as claimed in any one of claims 1 to 4, wherein the system comprises a data acquisition layer, a data transmission layer and a data application layer; The data collection layer is used to collect the operation status data of the low-voltage branch circuit of the low-voltage station area through the branch load monitoring device; The data transmission layer is used to send the operating status data to the external intelligent device through the branch load monitoring device and receive the control instruction for the operating status data; and send the switch control signal to the external switch device based on the control instruction through the branch load monitoring device to control the low-voltage branch circuit; The data application layer is used to obtain the operation status data of the low-voltage branch circuit from the external intelligent device, and send the control instruction for the operation status data to the external intelligent device according to the analysis result of the operation status data; Wherein, the branch load monitoring device is specifically used for: Based on real-time multi-threaded operating system, it can simultaneously execute sampling and metering tasks, communication tasks and topology identification tasks; When executing the sampling and metering task, the operation status data of the low-voltage branch circuit of the low-voltage area is obtained from the metering module, and the low-voltage branch circuit is monitored for abnormalities according to the operation status data; When executing the communication task, it is used to send the operating status data to the external intelligent device and receive the control instructions for the operating status data sent by the external intelligent device, wherein the control instructions are used to generate a switch control signal for controlling the low-voltage branch circuit; When executing the topology identification task, a topology identification frame is sent and multiple topology identification reply frames are received through the communication module. Based on the source address that appears most frequently in the multiple topology identification reply frames, other branch load monitoring devices located on the same low-voltage branch circuit as the current branch load monitoring device are determined.

7. An electronic device, characterized in that: include: at least one processor and memory; The memory and the processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, the branch load monitoring method as claimed in claim 5 is implemented.

8. A readable storage medium, characterized in that: An execution program is stored thereon, and when the execution program is executed, the branch load monitoring method as claimed in claim 5 is implemented.

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