CN211453754U

CN211453754U - 10KV medium-voltage power distribution cabinet current-voltage power operation maintenance detection device

Info

Publication number: CN211453754U
Application number: CN201920698815.XU
Authority: CN
Inventors: 贺伟; 邹宇
Original assignee: Chengdu Electric Wizard Power Technology Co ltd
Current assignee: Chengdu Electric Wizard Power Technology Co ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-09-08
Anticipated expiration: 2029-05-16

Abstract

The utility model discloses a 10KV middling pressure switch board current-voltage electric power operation maintenance detection device, including a plurality of voltage sensor and a plurality of current sensor, voltage sensor and current sensor set up on the power cable of 10KV middling pressure electric cabinet, voltage sensor and current sensor's output is connected with data module through communication link, data module's output passes through cable junction to 10KV middling pressure switch board's control switch on, data module's output has communication module through cable junction, communication module signal connection has local control center, communication module signal connection has fortune dimension platform.

Description

10KV medium-voltage power distribution cabinet current-voltage power operation maintenance detection device

Technical Field

The utility model relates to a power supply field especially relates to a 10KV middling pressure switch board current-voltage electric power operation maintenance detection device.

Background

During use, the voltage and current values of the power cable need to be limited. If the voltage is too large, the voltage leakage of the power cable is easily caused, and the risk of electric leakage is caused. If the current is too large, the electric energy transmission efficiency of the power cable is reduced, the voltage value is reduced quickly, a standard voltage value cannot be provided for a power supply target, and the temperature of the power cable is increased quickly, so that a series of problems such as fire disasters and power supply faults are caused.

The voltage and current monitoring of the traditional power cable mainly adopts off-line monitoring, and detection personnel carry an instrument to carry out on-site detection, so that the real-time performance is poor, and the consumed manpower and material resources are large.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: aiming at the existing problems, the current-voltage power operation maintenance detection device for the 10KV medium-voltage power distribution cabinet is provided, the problem of real-time monitoring of the current and the voltage of the 10KV medium-voltage power distribution cabinet is solved, the problem of high monitoring cost of the current and the voltage of the 10KV medium-voltage power distribution cabinet is solved, and the problem of long regulation period of a power supply system caused by current and voltage fluctuation of the 10KV medium-voltage power distribution cabinet is solved.

The utility model adopts the technical scheme as follows:

the utility model provides a 10KV middling pressure switch board current-voltage electric power operation maintenance detection device, includes a plurality of voltage sensor and a plurality of current sensor, voltage sensor and current sensor set up on 10KV middling pressure switch board's power cable, voltage sensor and current sensor's output is connected with data module through communication link, data module's output is connected to 10KV middling pressure switch board's control switch through the cable on, data module's output has communication module through cable connection, communication module signal connection has local control center, communication module signal connection has fortune dimension platform. The communication module is connected with the operation and maintenance platform through a network line; the voltage sensor is a voltage transformer, and the current sensor is a current transformer.

Further, the utility model discloses an optimal structure of a 10KV medium voltage distribution cabinet current-voltage power operation maintenance detection device, wherein the data module comprises a central processing unit and a memory; the central processing unit is connected with the memory through a bus.

Furthermore, a self-diagnosis module and a pre-judgment module are arranged in a memory preset in the memory, a protection set value is preset in the self-diagnosis module, and a central processing unit in the data module compares the received data with the protection set value and outputs a control signal according to the comparison result; and the control signal is fed back to a control switch of the low-voltage power distribution cabinet through a communication line.

Furthermore, a pre-judgment set value is preset in the pre-judgment module, a plurality of maintenance schemes are stored in the pre-judgment module, the central processing unit in the data module compares the received data with the pre-judgment set value, and triggers different maintenance schemes according to the comparison result, and the central processing unit outputs the triggered maintenance schemes through signals.

Furthermore, the operation and maintenance platform is provided with judgment parameters, compares the signals transmitted by the communication module with the judgment parameters, gives corresponding early warning, transmits the early warning signals to workers, and performs field inspection and maintenance.

Further, the voltage sensor and the current sensor are analog sensors or digital sensors.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the data acquisition is convenient: the monitoring device not only can independently install the current and voltage sensors in each 10KV medium-voltage power distribution cabinet, but also can be compatible with the 10KV medium-voltage power distribution cabinets equipped with the current and voltage sensors.

2. Monitoring multiple power distribution cabinets simultaneously: utilize data module's multichannel characteristic, can compare the mounting dimension littleer with traditional single channel module to a plurality of switch boards sampling monitoring of electric power system simultaneously, more practice thrift installation space.

3. The energy consumption is low: the monitoring device has the integrated multi-channel characteristic, and has lower energy consumption and longer service life compared with the traditional multiple single-channel modules in the data receiving and sending of the power distribution cabinets with the same quantity.

4. The expandability is strong: for the condition that the low-voltage power distribution cabinet is more, an extended data module without a CPU can be additionally arranged, and the data modules share one CPU, so that the expansibility is strong.

Drawings

Fig. 1 is a schematic diagram of the temperature data acquisition structure of the present invention;

fig. 2 is a schematic structural diagram of the present invention;

fig. 3 is a block diagram of the structure of the flow of temperature data according to the present invention;

fig. 4 is a schematic flow chart of the temperature data determination of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-4, the present invention comprises a plurality of current and voltage sensors, which are connected with the data module via wireless communication device; the data module is in signal connection with the communication module through a communication link.

The current and voltage sensors comprise current transformers, voltage transformers and detection devices, the power cable is provided with a plurality of current transformers and voltage transformers, the current transformers and the voltage transformers are connected with the detection devices through cables, and the detection devices comprise signal conditioning circuits, gating switches, A/D conversion circuits and wireless communication circuits. The output ends of the current and voltage transformers are electrically connected with the input end of the signal conditioning circuit, the output end of the signal conditioning circuit is in signal connection with the input end of the gating switch, the output end of the gating switch is in signal connection with the input end of the A/D conversion circuit, and the output end of the A/D conversion circuit is connected with the signal input end of the wireless communication circuit. The wireless communication circuit is in signal communication with the data module.

The detection device can be connected with a plurality of current and voltage transformers. The plurality of detection devices may be in signal communication with a data module.

The data module comprises a central processing unit and a memory; the central processing unit is connected with the memory through a bus.

A self-diagnosis module and a pre-judgment module are arranged in a memory preset in the memory, a protection set value is preset in the self-diagnosis module, a central processing unit in the data module compares the received data with the protection set value, and a control signal is output according to a comparison result; and the control signal is fed back to a control switch of the 10KV power distribution cabinet through a communication line.

Therefore, the current and voltage of the 10KV power distribution cabinet can be acquired in real time, the current and voltage of the 10KV power distribution cabinet can be monitored in real time, and the safe operation of the current and voltage of the 10KV power distribution cabinet is guaranteed.

The data transmission process is as shown in fig. 3, the current and voltage transformers transmit the acquired current and voltage data to the memory in the data module through the data acquisition channel, and the memory performs data interaction with the processor. And the CPU runs the preset programs in the self-diagnosis module and the pre-judgment module and sends the results out through the communication device.

The operation process of the self-diagnosis module and the pre-judgment module is shown in fig. 4, the current and voltage mutual inductors transmit the measured current and voltage data i to the memory in the data module, and the memory transmits the data to the CPU. The temperature protection value Isp on the power cable is preset in the self-diagnosis module, the CPU compares the current and voltage data i with the protection set value Isp, and when the current and voltage data i is less than or equal to the protection set value Isp, the data module does not respond and continues the next cycle. When the current and voltage data i are larger than the protection set value Isp, the data module sends out an alarm signal through a cable or controls an electric control switch of the 10KV power distribution cabinet to trip, so that the safety of the power supply circuit is protected.

Meanwhile, the data module sends the processed result to a local control center through the communication module and sends the processed result to the operation and maintenance platform through a network access. And the protection set value Isp is determined according to the maximum working voltage and current value of the factory, so that the cable is not dangerous.

The pre-judging module is preset with a pre-judging set value Iyp on the power cable, the CPU compares the current and voltage data i with the pre-judging set value Iyp, and when the current and voltage data i is less than or equal to the pre-judging set value Iyp, the data module does not respond and continues the next cycle. When the current and voltage data i are larger than the predetermined set value Iyp, the data module triggers a maintenance scheme to protect the safety of the power supply circuit.

Meanwhile, the data module sends the processed result to a local control center through the communication module and sends the processed result to the operation and maintenance platform through a network access.

The prejudged set value Iyp is a parameter specific to the monitoring device, and is a recommended value obtained by considering various aspects such as a power cable factory characteristic curve, a past year operation record, a preventive test report, an environmental temperature and the like.

And adjusting according to the working current and the environmental temperature value of the cable by taking the safe current voltage value of the cable produced and delivered as a standard. The fine adjustment is also carried out according to the service life and the service environment of the cable, when the working environment voltage is higher, the pre-judgment set value Iyp is properly reduced, and when the heavy load time is too long, the pre-judgment set value Iyp is properly reduced. In this way, the operational safety of the cable is ensured.

The maintenance scheme comprises the following steps:

the first-level maintenance scheme comprises the following steps: for on-line inspection, whether the operation parameters of the power cable are normal or not and the operation condition of the load on the lower stage of the power cable are inspected.

And (3) secondary maintenance scheme: for the power failure inspection, the load carried by the power cable is mainly inspected and measured to confirm the fault reason.

A three-level maintenance scheme: for the power failure inspection, annual inspection and preventive tests including characteristic tests are performed on the entire power cable.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a 10KV middling pressure switch board current-voltage electric power operation maintenance detection device which characterized in that: the intelligent power distribution system comprises a plurality of voltage sensors and a plurality of current sensors, wherein the voltage sensors and the current sensors are arranged on a power cable of a 10KV medium-voltage power distribution cabinet, the output ends of the voltage sensors and the current sensors are connected with a data module through a communication link, the output end of the data module is connected to a control switch of the 10KV medium-voltage power distribution cabinet through a cable, the output end of the data module is connected with a communication module through a cable, the communication module is in signal connection with a local control center, and the communication module is in signal connection with an operation and maintenance platform; the voltage sensor is a voltage transformer, and the current sensor is a current transformer.

2. The current-voltage power operation maintenance detection device for the 10KV medium-voltage distribution cabinet according to claim 1, characterized in that: the data module comprises a central processing unit and a memory; the central processing unit is connected with the memory through a bus.

3. The current-voltage power operation maintenance detection device of the 10KV medium-voltage distribution cabinet according to claim 2, characterized in that: a self-diagnosis module and a pre-judgment module are arranged in a memory preset in the memory, a protection set value is preset in the self-diagnosis module, a central processing unit in the data module compares the received data with the protection set value, and a control signal is output according to a comparison result; and the control signal is fed back to a control switch of the low-voltage power distribution cabinet through a communication line.

4. The current-voltage power operation maintenance detection device of the 10KV medium-voltage distribution cabinet according to claim 3, characterized in that: the pre-judging module is preset with a pre-judging set value, the pre-judging module is stored with a plurality of maintenance schemes, the central processing unit in the data module compares the received data with the pre-judging set value and triggers different maintenance schemes according to the comparison result, and the central processing unit outputs the triggered maintenance schemes through signals.

5. The current-voltage power operation maintenance detection device of the 10KV medium-voltage power distribution cabinet according to claim 4, characterized in that: and the operation and maintenance platform is provided with judgment parameters, compares the signals transmitted by the communication module with the judgment parameters, makes corresponding early warning, transmits the early warning signals to workers, and performs field inspection and maintenance.

6. The device for detecting the current-voltage electric power operation maintenance of a 10KV medium-voltage distribution cabinet according to one of claims 1 to 5, characterized in that: the voltage sensor and the current sensor are analog sensors or digital sensors.