Four-fusion integrated terminal

Abstract

The utility model relates to the technical field of photovoltaic monitoring, in particular to a four-fusion integrated terminal, which comprises a terminal body, and an input wiring terminal, an output wiring terminal and a conversion line wiring port are arranged on the outer surface of the terminal body. The input wiring terminal is electrically connected with the output end of the photovoltaic inverter, and the output wiring terminal is electrically connected with a power grid transmission line; the conversion line wiring port is connected with the photovoltaic inverter through a conversion line; a protocol conversion module, a processor unit, a metering sampling module, a circuit break protection module and a carrier communication module are arranged in the terminal body; the processor unit is electrically connected with the protocol conversion module, the metering sampling module, the circuit break protection module and the carrier communication module. Functions of metering sampling, protocol conversion, circuit break protection and the like are integrated in one terminal, so that monitoring and management of a distributed photovoltaic power generation system are simplified, the terminal can be directly connected with a photovoltaic inverter and a power transmission line of a power grid, and metering monitoring and data communication of electric energy are realized.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic monitoring technology, specifically a four-in-one integrated terminal. Background Technology

[0002] With the large-scale grid connection of distributed photovoltaic power generation systems, the unique characteristic of photovoltaic power generation being "no light when clouds come" and the direct grid connection of photovoltaic inverter power output has brought certain impacts to the stable operation of the grid. In order to ensure the safe and stable operation of the grid, the power grid company requires effective monitoring of existing distributed photovoltaic power.

[0003] However, in distributed photovoltaic power generation systems, the ownership of photovoltaic inverters is divided among users, and there are many inverter manufacturers, models, interfaces, and communication protocols, lacking a unified standard. When different models of photovoltaic inverters are connected for monitoring, their interfaces cannot be matched in a unified manner, requiring separate configuration of photovoltaic interface converters and photovoltaic protocol converters, resulting in excessively high investment costs. Furthermore, distributed photovoltaic monitoring also requires the use of circuit breakers and electricity meters, and the large number of devices and components makes on-site construction wiring complex. Utility Model Content

[0004] To address the aforementioned issues, this utility model provides a four-in-one integrated terminal that is electrically connected to a photovoltaic inverter and a power grid transmission line. The four-in-one integrated terminal includes a terminal body, the outer surface of which is provided with input terminals, output terminals, and a conversion cable connection port. The input terminals are electrically connected to the output end of the photovoltaic inverter, and the output terminals are electrically connected to the power grid transmission line. The conversion cable connection port is connected to the photovoltaic inverter via a conversion cable.

[0005] The terminal body is internally equipped with a protocol conversion module, a processor unit, a metering and sampling module, a circuit breaker protection module, and a carrier communication module; the processor unit is electrically connected to the protocol conversion module, the metering and sampling module, the circuit breaker protection module, and the carrier communication module, respectively.

[0006] In order to measure and monitor the electrical energy output by the photovoltaic inverter, the metering sampling module includes a voltage acquisition sensor, a current acquisition sensor, an analog-to-digital converter, and a metering chip. The voltage acquisition sensor and the current acquisition sensor are electrically connected to the input terminal of the analog-to-digital converter, and the output terminal of the analog-to-digital converter is electrically connected to the metering chip.

[0007] In a specific implementation, the metering chip is an ATT7022E chip.

[0008] The protocol conversion module includes a protocol conversion chip and a register, and the protocol conversion chip and the register are electrically connected.

[0009] In a specific implementation, the protocol conversion chip is model APM32E103.

[0010] The carrier communication module can communicate and interconnect with the upper-level distribution area concentrator via the power grid transmission line.

[0011] To achieve circuit breaker protection and control of grid connection and off-grid operation of the photovoltaic inverter, the circuit breaker protection module is equipped with an air switch.

[0012] The four-in-one integrated terminal also includes a power module, which is electrically connected to the input terminals and the processor unit. The power module includes an AD-DC conversion circuit and a power supply circuit, which are electrically connected.

[0013] Beneficial Effects: This utility model is a four-in-one integrated terminal that simplifies the monitoring and management of distributed photovoltaic power generation systems by integrating metering sampling, protocol conversion, and circuit breaker protection functions into a single terminal. This terminal can directly connect to the photovoltaic inverter and the power grid transmission line to achieve power metering monitoring and data communication without the need for additional interface converters and protocol converters, thereby reducing investment costs, simplifying on-site wiring, reducing the number of equipment components, and lowering the complexity of on-site construction. Simultaneously, through its integrated circuit breaker protection module, the terminal can achieve grid-connected and off-grid control of the photovoltaic inverter, as well as circuit breaker protection, ensuring the safe and stable operation of the power grid. Attached Figure Description

[0014] Figure 1 The circuit structure is for a four-in-one integrated terminal;

[0015] Figure 2 This is a schematic diagram of the terminal body. Detailed Implementation

[0016] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0017] See Figure 1 This embodiment provides a four-in-one integrated terminal that can be electrically connected to a photovoltaic inverter and a power grid transmission line. It can feed the electrical energy output by the photovoltaic inverter into the power grid transmission line, making it convenient for the power grid user side to absorb the load. At the same time, it can communicate with the photovoltaic inverter and convert the communication protocol to obtain the photovoltaic inverter's operating data.

[0018] The four-in-one integrated terminal includes a terminal body. The outer surface of the terminal body is provided with input terminals, output terminals, and a conversion cable port. The input terminals are electrically connected to the output terminal of the photovoltaic inverter, and the output terminals are electrically connected to the power grid transmission line. The conversion cable port is connected to the photovoltaic inverter via a conversion cable, enabling data communication with the photovoltaic inverter. The terminal body internally includes a protocol conversion module, a processor unit, a metering and sampling module, a circuit breaker protection module, and a carrier communication module.

[0019] On one hand, the four-in-one integrated terminal can meter and monitor the electrical energy output by the photovoltaic inverter. The input end of the metering sampling module is electrically connected to the input terminal block, and its output end is electrically connected to the processor unit. The metering sampling module is used to collect voltage and current signals at the input terminal block in real time, perform electrical energy metering, and transmit the metering information to the processor unit. The metering sampling module includes a voltage acquisition sensor, a current acquisition sensor, an analog-to-digital converter, and a metering chip. The metering chip uses an ATT7022E chip. The voltage acquisition sensor and the current acquisition sensor are respectively electrically connected to the input end of the analog-to-digital converter. The analog-to-digital converter can digitally convert the analog signals detected and collected by the voltage acquisition sensor and the current acquisition sensor. The output end of the analog-to-digital converter is electrically connected to the input end of the metering chip. The metering chip performs metering processing based on the voltage and current signals converted by the analog-to-digital converter.

[0020] On the other hand, the four-in-one integrated terminal can upload monitoring data from the photovoltaic inverter and receive control signals from the upper level to communicate and exchange data with the photovoltaic inverter. The processor unit is electrically connected to the carrier communication module, which can communicate and interconnect with the upper-level distribution area concentrator through the power grid transmission line. The processor unit uploads metering information to the distribution area concentrator through the carrier communication module. One end of the protocol conversion module is connected to the external conversion line connection port, and the other end is connected to the processor unit. The processor unit can collect the operating status of the photovoltaic inverter in real time through the protocol conversion module, convert the data through the protocol conversion module, and transmit the converted data to the distribution area concentrator through the carrier communication module. This facilitates the distribution area concentrator to monitor and manage the photovoltaic inverter. When the distribution area concentrator detects that the photovoltaic power generation on the user side is excessive, it sends a control signal to the processor unit of the four-in-one integrated terminal. The processor unit converts the communication protocol through the protocol conversion module into a control signal that the photovoltaic inverter can recognize, and controls the corresponding photovoltaic inverter to adjust its operating status.

[0021] To achieve circuit breaker protection and control of grid-connected and off-grid operation of the photovoltaic inverter, the processor unit is electrically connected to the circuit breaker protection module. The circuit breaker protection module is equipped with an air switch that can switch power on and off based on the trigger current of the processor unit. When the metering data from the metering sampling module reaches the processor unit's preset overvoltage, overcurrent, or short-circuit conditions, the processor unit triggers the circuit breaker protection module to generate a trigger current, which in turn controls the terminal body to trip for protection. Simultaneously, the processing module obtains the control signal from the distribution concentrator via the carrier communication module to determine whether the connected photovoltaic power generation system is grid-connected or off-grid, and switches power on and off via the circuit breaker protection module.

[0022] The four-in-one integrated terminal also includes a power module, which includes an AD-DC conversion circuit and a power supply circuit, and the AD-DC conversion circuit and the power supply circuit are electrically connected. The power module is electrically connected to the input terminal and the processor unit, respectively, and can draw power from the input terminal and convert AC power into DC power through the AD-DC conversion circuit to provide power to the processor unit.

Claims

1. A four-in-one integrated terminal, electrically connected to a photovoltaic inverter and a power grid transmission line, characterized in that, The four-integrated terminal includes a terminal body, the outer surface of which is provided with an input terminal, an output terminal, and a conversion line connection port; the input terminal is electrically connected to the output terminal of the photovoltaic inverter, and the output terminal is electrically connected to the power grid transmission line; the conversion line connection port is connected to the photovoltaic inverter through a conversion line. The terminal body is internally equipped with a protocol conversion module, a processor unit, a metering sampling module, a circuit breaker protection module, and a carrier communication module; the processor unit is electrically connected to the protocol conversion module, the metering sampling module, the circuit breaker protection module, and the carrier communication module respectively; the protocol conversion module is connected to the conversion line wiring port; and the metering sampling module is electrically connected to the input wiring terminal.

2. The four-in-one integrated terminal according to claim 1, characterized in that, The metering sampling module includes a voltage acquisition sensor, a current acquisition sensor, an analog-to-digital converter, and a metering chip. The voltage acquisition sensor and the current acquisition sensor are electrically connected to the input terminal of the analog-to-digital converter, and the output terminal of the analog-to-digital converter is electrically connected to the metering chip.

3. The four-in-one integrated terminal according to claim 1, characterized in that, The protocol conversion module includes a protocol conversion chip and a register, and the protocol conversion chip and the register are electrically connected.

4. The four-in-one integrated terminal according to claim 2, characterized in that, The metering chip used is the ATT7022E chip.

5. The four-in-one integrated terminal according to claim 3, characterized in that, The protocol conversion chip is model APM32E103.

6. The four-in-one integrated terminal according to claim 1, characterized in that, The carrier communication module can communicate and interconnect with the upper-level distribution area concentrator via the power grid transmission line.

7. The four-in-one integrated terminal according to claim 1, characterized in that, The circuit breaker protection module is equipped with an air switch.

8. The four-in-one integrated terminal according to claim 1, characterized in that, The four-in-one integrated terminal also includes a power module, which is electrically connected to the input terminal block and the processor unit.

9. The four-in-one integrated terminal according to claim 8, characterized in that, The power module includes an AD-DC conversion circuit and a power supply circuit, which are electrically connected.

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