CN209748207U - Low-voltage grid-connected switch - Google Patents
Low-voltage grid-connected switch Download PDFInfo
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- CN209748207U CN209748207U CN201920661141.6U CN201920661141U CN209748207U CN 209748207 U CN209748207 U CN 209748207U CN 201920661141 U CN201920661141 U CN 201920661141U CN 209748207 U CN209748207 U CN 209748207U
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Abstract
The utility model discloses a low-voltage grid-connected switch, which comprises a switch body and an upper cover; the upper cover is arranged on the switch body, and the upper cover and the switch body are enclosed to form an accommodating cavity; the control panel, the electric operating mechanism, the undervoltage release and the battery are arranged in the accommodating cavity; the surface of the upper cover is provided with a panel and a power switch; the switch body is connected with the electric operating mechanism and the undervoltage release through leads; the control panel is provided with a CPU, a communication module and a power supply; the power supply is connected with the battery and the power switch; one side of the CPU is connected with a communication module through a lead, and the other side of the CPU is connected with a trip coil drive, a time delay module, a state acquisition module and a no-voltage energy storage module through a lead. The utility model is special for low voltage grid connection, and has the functions of under-voltage delay tripping and automatic closing; the anti-islanding device is provided, so that the circuit can be cut off when the circuit is operated in an islanding state, and the safety of an electric appliance and maintainers is protected; the volume is small and the installation is convenient.
Description
Technical Field
The utility model relates to a switch especially relates to a low pressure switch that is incorporated into power networks.
Background
With the continuous application and innovation of new resources, photovoltaic power generation is widely applied. The low-voltage grid-connected photovoltaic system is mainly installed in enterprises, schools, residences and other places. The conventional photovoltaic system switch can be manually or electrically operated to perform switching-on and switching-off operations. However, when the false fault of the power grid is encountered, the fault is often difficult to distinguish and the opening operation is directly carried out, so that the loss is often caused to the power utilization users; in addition, when the photovoltaic power generation system has an island effect, defense is difficult to generate.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides a low-voltage grid-connected switch.
in order to solve the technical problem, the utility model discloses a technical scheme is: a low-voltage grid-connected switch comprises a switch body and an upper cover; the upper cover is arranged on the switch body, and the upper cover and the switch body are enclosed to form an accommodating cavity; the control panel, the electric operating mechanism, the undervoltage release and the battery are arranged in the accommodating cavity; the surface of the upper cover is provided with a panel and a power switch;
The switch body is connected with the electric operating mechanism and the undervoltage release through leads; the control panel is provided with a CPU, a communication module and a power supply; the power supply is connected with the battery and the power switch; one side of the CPU is connected with a communication module wire, and the other side of the CPU is connected with a trip coil drive, a time delay module, a state acquisition module and a no-voltage energy storage module; the trip coil drive is connected with the undervoltage release through a lead; the trip coil drive is also connected with the delay module; a load special controller and a disturbance resistor are connected between the delay module and the state acquisition module; the state acquisition module is connected with the switch body through a wire; one side of the no-voltage energy storage module is connected with a power supply lead, and the other side of the no-voltage energy storage module is connected with an electric operating mechanism lead;
a digital-to-analog converter is arranged in the CPU; the delay module comprises a delay switch; the communication module is connected with the communication equipment; the communication equipment is connected with the display terminal through the antenna.
Further, the electric operating mechanism comprises a motor and a switching-on/off handle; a cantilever is fixedly connected to the motor; the free end of the cantilever is fixedly connected with the connecting rod; the other end of the connecting rod is fixedly connected with the opening and closing handle.
Further, the perturbation resistance is 100KW or 200KW or 400KW in specification.
further, the no-voltage energy storage module comprises a plurality of voltage-regulator tubes and a plurality of capacitors.
Further, the load-dedicated controller is an RCX-9390K load-dedicated controller.
The utility model is special for low voltage grid connection, and has the functions of under-voltage delay tripping and automatic closing; the anti-islanding device is provided, so that the circuit can be cut off when the circuit is operated in an islanding state, and the safety of an electric appliance and maintainers is protected; the volume is small and the installation is convenient.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is an overall structure diagram of the present invention.
Fig. 3 is a circuit schematic diagram of the state acquisition module.
Fig. 4 is a circuit schematic of a no-voltage energy storage module.
Fig. 5 is a schematic circuit diagram of the trip coil drive.
1. A switch body; 2. an upper cover; 3. a panel; 4. a power switch; 5. a control panel; 6. a motor; 7. A cantilever; 8. a connecting rod; 9. a switch-on/off handle.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The low-voltage grid-connected switch shown in fig. 2 comprises a switch body 1 and an upper cover 2; the upper cover 2 is covered on the switch body, and the upper cover and the switch body enclose an accommodating cavity; the control panel 5, the electric operating mechanism, the undervoltage release and the battery are arranged in the accommodating cavity; the surface of the upper cover is provided with a panel 3 and a power switch 4;
As shown in fig. 1, the switch body is connected with the electric operating mechanism and the undervoltage release through wires; the control panel 5 is provided with a CPU, a communication module and a power supply; the CPU is a central processing unit, and a digital-to-analog converter is arranged in the CPU and is responsible for collecting and calculating voltage, reading delay time, controlling a trip coil and the like; the communication module is connected with the communication equipment; the communication equipment is connected with the display terminal through an antenna; the communication module is responsible for transmitting the data information in the switch to the remote monitoring, and is convenient for remote control.
The power supply is connected with the battery and the power switch 4; one side of the CPU is connected with a communication module through a lead, and the other side of the CPU is connected with a trip coil drive, a time delay module, a state acquisition module and a no-voltage energy storage module through a lead.
the trip coil drive is connected with the lead of the undervoltage release, as shown in fig. 5, the trip coil drive can control the undervoltage release to trip; the trip coil drive is also connected with a delay module, the delay module comprises a delay switch, and the delay module can delay the tripping action;
A load special controller and a disturbance resistor are connected between the delay module and the state acquisition module, and the specification of the disturbance resistor is 100KW or 200KW or 400 KW; the load special controller is an RCX-9390K load special controller; the disturbance resistor and the load special controller are combined to form an anti-islanding device, and the anti-islanding device can timely trip off the circuit breaker when the photovoltaic power generation islanding operates, so that an electric appliance and maintainers are protected; with anti-island device and time delay module usefulness even, when the anti-island device of low pressure misconnected, can jump off the circuit breaker immediately, and when anti-island function became invalid, accessible time delay module jumped off the circuit breaker, guaranteed that disturbance resistance is not damaged.
As shown in fig. 3, the state acquisition module is connected to the switch body via a wire, and can help the state acquisition module to acquire the voltage of the switch and convert the voltage into a low voltage signal, and perform sampling and calculation in the CPU, and the CPU determines that the current circuit state is a voltage loss, an undervoltage or a normal state, thereby further controlling the opening or closing of the switch.
As shown in fig. 4, one side of the no-voltage energy storage module is connected with a power supply lead, and the other side is connected with an electric operating mechanism lead; the no-voltage energy storage module comprises a plurality of voltage-stabilizing tubes and a plurality of capacitors, the voltage-stabilizing tubes are respectively VD15, VD16, VD17 and VD2, and the voltage-stabilizing tubes are used for carrying out carrier control; the capacitors are respectively C13, C15, C16, C13C, C15C and C16C, and form an energy storage circuit, and the energy storage circuit is matched with a voltage regulator tube to stabilize the voltage at 400V and provide energy required by voltage loss time delay tripping.
The electric operating mechanism comprises a motor 6 and a switching-on/off handle 9; a cantilever 7 is fixedly connected to the motor 6; the free end of the cantilever 7 is fixedly connected with a connecting rod 8; the other end of the connecting rod 8 is fixedly connected with a switching-on and switching-off handle 9, and the electric operating mechanism can realize automatic switching-on and switching-off of the switch.
The utility model discloses an application principle does:
The control panel monitors the power supply voltage in real time, when the voltage is reduced to 70-30% of rated voltage, the time is delayed for 10s, and if the voltage is still not normal after 10s, the control panel is tripped; and if the voltage is recovered to 85% within 10s, the trip is not generated. When the switch is under-voltage tripped, the voltage is recovered to more than 85%, the control panel firstly sends out a pull-in instruction of the under-voltage tripper and then controls the electric operating mechanism to be buckled and closed.
When the photovoltaic power generation is in isolated network operation, the disturbance load is controlled by the load special controller and the disturbance resistor to force the inverter to stop working, so that the aims of protecting the circuit and safely overhauling are fulfilled.
Compared with the prior art, the utility model mainly has the following advantages:
a. the low-voltage grid-connected special device has the functions of under-voltage delay tripping and automatic closing;
b. The anti-islanding device is provided, so that the circuit can be cut off when the circuit is operated in an islanding state, and the safety of an electric appliance and maintainers is protected;
c. The volume is small and the installation is convenient.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and the technical personnel in the technical field are in the present invention, which can also belong to the protection scope of the present invention.
Claims (5)
1. The utility model provides a low pressure grid-connected switch, includes switch body (1), its characterized in that: also comprises an upper cover (2); the upper cover (2) is covered on the switch body, and the upper cover and the switch body are enclosed to form an accommodating cavity; a control board (5), an electric operating mechanism, an undervoltage release and a battery are arranged in the accommodating cavity; a panel (3) and a power switch (4) are arranged on the surface of the upper cover;
the switch body is connected with the electric operating mechanism and the undervoltage release through leads; the control panel (5) is provided with a CPU, a communication module and a power supply; the power supply is connected with a battery and a power switch (4); one side of the CPU is connected with a communication module wire, and the other side of the CPU is connected with a trip coil driver, a time delay module, a state acquisition module and a no-voltage energy storage module; the trip coil drive is connected with the undervoltage release through a lead; the trip coil drive is also connected with the delay module; a load special controller and a disturbance resistor are connected between the delay module and the state acquisition module; the state acquisition module is connected with the switch body through a wire; one side of the no-voltage energy storage module is connected with a power supply lead, and the other side of the no-voltage energy storage module is connected with an electric operating mechanism lead;
A digital-to-analog converter is arranged in the CPU; the delay module comprises a delay switch; the communication module is connected with communication equipment; the communication equipment is connected with the display terminal through the antenna.
2. The low-voltage grid-connected switch according to claim 1, characterized in that: the electric operating mechanism comprises a motor (6) and a switching-on/off handle (9); a cantilever (7) is fixedly connected to the motor (6); the free end of the cantilever (7) is fixedly connected with the connecting rod (8); the other end of the connecting rod (8) is fixedly connected with the opening and closing handle (9).
3. the low-voltage grid-connected switch according to claim 1, characterized in that: the disturbance resistor is 100KW or 200KW or 400KW in specification.
4. the low-voltage grid-connected switch according to claim 1, characterized in that: the no-voltage energy storage module comprises a plurality of voltage-regulator tubes and a plurality of capacitors.
5. The low-voltage grid-connected switch according to claim 1, characterized in that: the load special controller is an RCX-9390K load special controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920661141.6U CN209748207U (en) | 2019-05-09 | 2019-05-09 | Low-voltage grid-connected switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920661141.6U CN209748207U (en) | 2019-05-09 | 2019-05-09 | Low-voltage grid-connected switch |
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| Publication Number | Publication Date |
|---|---|
| CN209748207U true CN209748207U (en) | 2019-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920661141.6U Active CN209748207U (en) | 2019-05-09 | 2019-05-09 | Low-voltage grid-connected switch |
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| CN (1) | CN209748207U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115241854A (en) * | 2022-09-26 | 2022-10-25 | 国网上海能源互联网研究院有限公司 | Method and system for low-voltage distributed photovoltaic grid-connected control and protection |
-
2019
- 2019-05-09 CN CN201920661141.6U patent/CN209748207U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115241854A (en) * | 2022-09-26 | 2022-10-25 | 国网上海能源互联网研究院有限公司 | Method and system for low-voltage distributed photovoltaic grid-connected control and protection |
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