CN209764956U - Online monitoring and early fault early warning system for parallel capacitor bank - Google Patents
Online monitoring and early fault early warning system for parallel capacitor bank Download PDFInfo
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- CN209764956U CN209764956U CN201821785715.2U CN201821785715U CN209764956U CN 209764956 U CN209764956 U CN 209764956U CN 201821785715 U CN201821785715 U CN 201821785715U CN 209764956 U CN209764956 U CN 209764956U
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Abstract
The utility model discloses an online monitoring and early fault early warning system of a parallel capacitor bank, which comprises a state sensor bank, a signal collection box, an in-station monitoring host and a remote monitoring platform, wherein the state sensor bank collects the voltage, the current and the temperature of a capacitor; the signal collection box performs A/D conversion on the collected data and transmits the data to the in-station monitoring host; the in-station monitoring host computer analyzes the numerical value transmitted by the signal collection box, displays the numerical value after resisting disturbance, and then sends the analyzed numerical value to the remote monitoring platform; the remote monitoring platform stores data sent by the monitoring host in the station. Each module coordination work, can be effectively quick carry out real-time detection to shunt capacitance ware to in time discover early trouble, in addition, through increasing monitor terminal, can in time send alarm information to maintenance personal, thereby take counter-measure in advance, reduce the influence to user power supply quality, and improved fault handling efficiency greatly.
Description
Technical Field
The utility model relates to an on-line monitoring field, in particular to on-line monitoring and early fault early warning system of parallel capacitor group.
background
the parallel capacitor complete device is widely applied to reactive power compensation of a power system, and is generally installed in a transformer substation to adopt centralized compensation. With the increasing expansion of the scale of the power grid and the increasing of the load demand, the voltage and reactive power of the system are regulated more and more frequently, and the safe operation of the parallel capacitor complete equipment plays an important role in the reactive power balance and the power supply voltage stabilization of the whole power system.
The parallel capacitor complete equipment comprises a parallel capacitor group, a series reactor, a discharge coil, a lightning arrester, an isolating switch, a grounding knife switch and other electrical equipment which are mutually connected by adopting hard copper bars and are connected into a main power grid through a high-voltage cable. The parallel capacitor bank usually adopts a frame structure, each phase is formed by connecting a plurality of capacitor units in parallel, and each capacitor unit internally comprises a plurality of capacitor elements. Under the normal condition, the voltage and the current born by each capacitor unit and each element inside the capacitor unit are balanced, when a certain capacitor element of a certain capacitor unit fails due to poor quality, insulation aging, poor working conditions and the like, the voltage and the current born by other normal elements and normal capacitor units are higher than the original values, so that the normal elements and the capacitor units are more prone to failure, and chain reaction is caused.
In addition, when the internal faults of the capacitor units are accumulated to a certain degree, the appearance forms of the capacitor units tend to be violent, even serious accidents such as explosion, fire and the like occur, and other normal capacitor units can be damaged due to impact, so that the accident range is enlarged, and the rush repair time and repair cost are increased.
Therefore, by monitoring the parallel capacitor bank on line, at the early stage of the fault (a small number of elements in the capacitor unit are in fault, but the severity is not enough to cause the whole set of equipment to be forcibly cut off), the early warning is timely recognized and sent out, the planned maintenance is favorably carried out by technicians, on one hand, preventive measures (such as changing the operation mode of a power grid, accessing a spare capacitor bank, sensitive customer voltage fluctuation early warning and the like) can be taken in advance, the influence on the power supply quality and safety production of users is reduced, on the other hand, the fault degree of the capacitor bank can be controlled in a small range, accident and expansion is prevented, and the cost for updating and transformation is reduced.
SUMMERY OF THE UTILITY MODEL
Aiming at overcoming the defects of the prior art, the utility model discloses a parallel capacitor bank on-line monitoring and early failure early warning system, which comprises a state sensor bank, a signal collection box, an in-station monitoring host and a remote monitoring platform, wherein,
The state sensor group collects the voltage, the current and the temperature of the capacitor;
the signal collection box performs A/D conversion and anti-interference on the collected data and then transmits the data to the in-station monitoring host;
The in-station monitoring host computer analyzes the numerical value transmitted by the signal collection box and displays the numerical value, and then sends the analyzed numerical value to a remote monitoring platform;
And the remote monitoring platform stores the data sent by the in-station monitoring host.
Further, the state sensor group comprises a current transformer, a voltage transformer and a temperature sensor.
Further, the signal collection box comprises a data acquisition unit, a control unit and a communication module, wherein the control unit controls the data acquisition unit to perform A/D conversion on the data acquired by the state sensor group, and a hardware circuit is arranged in the data collection box to preliminarily filter interference signals and control the communication module to send the converted numerical value to the in-station monitoring host.
Further, the in-station monitoring host comprises a controller, a touch screen, a harmonic analyzer and a communication module, wherein the controller is respectively in signal interconnection with the touch screen, the harmonic analyzer and the communication module, the harmonic analyzer analyzes the content of each harmonic of the acquired voltage and current signals in real time and transmits the content to the controller, the touch screen displays and inputs instructions, the controller performs secondary digital filtering on the received data, calculates relevant state parameters reflecting the running condition of the parallel capacitor bank and outputs a fault judgment result according to an early warning criterion, and the communication module transmits the analyzed data to the remote monitoring platform for storage.
and the monitoring terminal is used for remotely reading the data of the remote monitoring platform and receiving the alarm information sent by the remote monitoring platform.
further, the monitoring terminal comprises a computer, a mobile phone and a tablet computer.
further, the communication module is one or a combination of a wired network card, a wireless network card and a mobile communication module.
Further, the controller is an MCU controller.
The utility model discloses the beneficial effect who gains:
Each module coordination work, can be effective quick carry out real-time detection to the running state of parallel capacitor group, can in time discover the early trouble of parallel capacitor, in addition, through increasing monitor terminal, can in time send alarm information to operation and maintenance maintainer, thereby initiatively arrange the maintenance plan, and through taking precautionary measure (if change electric wire netting operation mode, access reserve capacitor group, sensitive customer voltage fluctuation early warning etc.) in advance, reduce the influence to user's power supply quality and safety in production, and with the help of the fault location information that this system provided, maintainer's fault handling efficiency has been improved greatly.
drawings
Fig. 1 is a schematic diagram of an online monitoring and early failure early warning system for a parallel capacitor bank of the present invention;
FIG. 2 is a schematic diagram of a signal collection box;
Fig. 3 is a schematic diagram of an in-station monitoring host.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
the on-line monitoring and early failure early warning system of the parallel capacitor bank of the utility model is shown in figures 1-3 and comprises a state sensor group, a signal collection box, an in-station monitoring host and a remote monitoring platform, wherein,
The state sensor group collects the voltage, the current and the temperature of the capacitor;
The signal collection box performs A/D conversion and anti-interference on the collected data and then transmits the data to the in-station monitoring host;
The in-station monitoring host computer analyzes the numerical value transmitted by the signal collection box and displays the numerical value, and then sends the analyzed numerical value to the remote monitoring platform;
The remote monitoring platform stores data sent by the monitoring host in the station.
The state sensor group comprises a current transformer, a voltage transformer and a temperature sensor. The current transformer is installed at the root of the capacitor, and the current flowing through the capacitor is measured by the secondary winding of the current transformer. The voltage transformer is installed in parallel with the capacitor to measure the voltage value of the capacitor, the temperature sensor is installed at the parts which are easy to heat, such as the hard-row lap joints, the soft lead connecting points, the fuse binding points of the fuse and the like, and the temperature of the equipment is monitored in real time.
The signal collection box comprises a data acquisition unit, a control unit and a communication module, wherein the control unit controls the data acquisition unit to perform A/D conversion and anti-interference processing on data acquired by the state sensor group, and controls the communication module to send the converted numerical value to the in-station monitoring host; the control unit coordinates the work of each unit to ensure the validity of data.
The in-station monitoring host comprises a controller, a touch screen, a harmonic analyzer and a communication module, wherein the controller is an MCU (microprogrammed control Unit) controller, such as STM32F103C8T 6; the controller is respectively in signal interconnection with the touch screen, the harmonic analyzer and the communication module, the harmonic analyzer analyzes the content of each harmonic of the acquired voltage and current signals in real time and transmits the content to the controller, and the touch screen displays and inputs instructions, for example, the initialization of the interval of the monitored parallel capacitor bank can be completed through the touch screen, and the alarm information and the monitoring amount change curve in a custom time period can be inquired; the controller carries out secondary digital filtering on the received data, calculates relevant state parameters reflecting the running condition of the parallel capacitor bank, and outputs a fault judgment result by contrasting with an early warning criterion; and the communication module transmits the analyzed data to a remote monitoring platform for storage.
In order to enable the outburst workers to inquire the monitoring data in real time and receive the alarm information in time, the monitoring terminal is further included and used for remotely reading the data of the remote monitoring platform and receiving the alarm information sent by the remote monitoring platform. The monitoring terminal comprises a computer, a mobile phone and a tablet computer. For example, a computer is arranged at a monitoring station of a team, and the complete operation data of the parallel capacitor banks of each transformer substation can be remotely checked without going out of a house, and the functions of inquiry and export are provided; the mobile phone terminal is carried by operation and maintenance maintainers, can receive the fault short message prompt of the parallel capacitor bank at the first time, and browses partial key indexes by means of the mobile phone APP.
The communication module is one or a combination of a wired network card, a wireless network card and a mobile communication module. The diversified communication mode can ensure the stability of communication.
The utility model discloses when using, set for each parameter setting value through the touch-sensitive screen, after accomplishing, detect the parallel capacitor group through the state sensor group, carry out AD conversion and anti-interference processing to measured data through the acquisition unit, and the back controller sends the data after handling to the monitoring host computer in the station through communication module; this data pass through harmonic analyzer and contrast through controller and setting value after the filtering to give and judge the structure, with data transmission to the remote monitoring platform through communication module and save, and with alarm information transmission to monitor terminal, monitor terminal reads monitoring data through visiting the remote monitoring platform, and after the inquiry, rush to the problem point and maintain.
The utility model discloses the beneficial effect who gains:
Each module coordination work, can be effective quick carry out real-time detection to the running state of parallel capacitor group, and in time discover the early trouble of parallel capacitor, in addition, through increasing monitor terminal, can in time send alarm information to operation and maintenance maintainer, thereby initiatively arrange the maintenance plan, and through taking precautionary measure (if change electric wire netting operation mode, access reserve capacitor group, sensitive customer voltage fluctuation early warning etc.) in advance, reduce the influence to user's power supply quality and safety in production, and with the help of the fault location information that this system provided, maintainer's fault handling efficiency has been improved greatly.
The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is within the spirit and scope of the present invention.
Claims (8)
1. An on-line monitoring and early fault early warning system of a parallel capacitor bank is characterized by comprising a state sensor bank, a signal collection box, an in-station monitoring host and a remote monitoring platform, wherein,
the state sensor group collects the voltage, the current and the temperature of the capacitor;
The signal collection box performs A/D conversion and anti-interference on the collected data and then transmits the data to the in-station monitoring host;
The in-station monitoring host computer analyzes the numerical value transmitted by the signal collection box and displays the numerical value, and then sends the analyzed numerical value to a remote monitoring platform;
And the remote monitoring platform stores the data sent by the in-station monitoring host.
2. The system of claim 1, wherein the status sensor group comprises a current transformer, a voltage transformer and a temperature sensor.
3. The system of claim 1, wherein the signal collection box comprises a data acquisition unit, a control unit and a communication module, the control unit controls the data acquisition unit to perform A/D conversion on the data acquired by the state sensor group, a built-in hardware circuit is used for preliminarily filtering interference signals, and the communication module is controlled to send the converted numerical value to the in-station monitoring host.
4. The on-line monitoring and early fault early warning system of the parallel capacitor bank as claimed in claim 1, wherein the in-station monitoring host comprises a controller, a touch screen, a harmonic analyzer and a communication module, the controller is respectively connected with the touch screen, the harmonic analyzer and the communication module in signal communication, the harmonic analyzer analyzes the content of each subharmonic of the collected voltage and current signals in real time and transmits the content to the controller, the touch screen displays and inputs instructions, the controller performs secondary digital filtering on the received data, calculates relevant state parameters reflecting the operation condition of the parallel capacitor bank and outputs a fault judgment result according to an early warning criterion, and the communication module transmits the analyzed data to the remote monitoring platform for storage.
5. the system for on-line monitoring and early warning of faults of parallel capacitor banks according to claim 1, further comprising a monitoring terminal for remotely reading data of the remote monitoring platform and receiving alarm information sent by the remote monitoring platform.
6. the system of claim 5, wherein the monitoring terminal comprises a computer, a mobile phone, and a tablet computer.
7. the on-line monitoring and early warning system for the parallel capacitor banks according to any one of claims 3 to 4, wherein the communication module is one or more of a wired network card, a wireless network card and a mobile communication module.
8. The parallel capacitor bank on-line monitoring and early warning system of claim 4, wherein the controller is an MCU controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821785715.2U CN209764956U (en) | 2018-10-31 | 2018-10-31 | Online monitoring and early fault early warning system for parallel capacitor bank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821785715.2U CN209764956U (en) | 2018-10-31 | 2018-10-31 | Online monitoring and early fault early warning system for parallel capacitor bank |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212366A (en) * | 2018-10-31 | 2019-01-15 | 国网江苏省电力有限公司太仓市供电分公司 | A kind of shunt capacitor group on-line monitoring and initial failure early warning system |
| CN112710937A (en) * | 2020-12-17 | 2021-04-27 | 中国电力科学研究院有限公司 | System and method for monitoring capacitor bank running state |
| CN113381598A (en) * | 2021-06-18 | 2021-09-10 | 浪潮商用机器有限公司 | Power supply device control system and method |
| CN112710937B (en) * | 2020-12-17 | 2024-04-26 | 中国电力科学研究院有限公司 | System and method for monitoring running state of capacitor bank |
-
2018
- 2018-10-31 CN CN201821785715.2U patent/CN209764956U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212366A (en) * | 2018-10-31 | 2019-01-15 | 国网江苏省电力有限公司太仓市供电分公司 | A kind of shunt capacitor group on-line monitoring and initial failure early warning system |
| CN112710937A (en) * | 2020-12-17 | 2021-04-27 | 中国电力科学研究院有限公司 | System and method for monitoring capacitor bank running state |
| CN112710937B (en) * | 2020-12-17 | 2024-04-26 | 中国电力科学研究院有限公司 | System and method for monitoring running state of capacitor bank |
| CN113381598A (en) * | 2021-06-18 | 2021-09-10 | 浪潮商用机器有限公司 | Power supply device control system and method |
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