CN112684737A - Suspension potential on-line monitoring system with voltage-sharing function - Google Patents
Suspension potential on-line monitoring system with voltage-sharing function Download PDFInfo
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- CN112684737A CN112684737A CN202011461840.XA CN202011461840A CN112684737A CN 112684737 A CN112684737 A CN 112684737A CN 202011461840 A CN202011461840 A CN 202011461840A CN 112684737 A CN112684737 A CN 112684737A
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Abstract
The invention discloses a suspension potential on-line monitoring system with a voltage-sharing function, which comprises a resistance-capacitance voltage-dividing device, an induction power coil, an AC/DC conversion circuit, a signal conditioning circuit, an A/D conversion circuit, a CPU, a wireless communication module, an energy storage capacitor and a remote control system. The resistance-capacitance voltage division device realizes measurement of suspension potential between fractures, and data acquired by the resistance-capacitance voltage division device is transmitted to the A/D conversion circuit through the data conditioning circuit to obtain conversion between monitoring data analog quantity and digital quantity; the CPU is used as a central processing unit, stores the measured suspension potential between fractures and sends the suspension potential to a remote control system through a wireless transmission module; the induction power supply coil surrounds the main loop to charge the energy storage capacitor; the energy storage capacitor provides required electric energy for the monitoring device. The remote control system receives the data, analyzes and processes the data through a fault monitoring and handling method, and displays the processing result in the display unit in real time. All modules work in a coordinated mode, early faults can be found timely, fracture voltage measurement is achieved, and meanwhile the parallel capacitor bank is monitored and early warned on line.
Description
Technical Field
The invention relates to the field of electrical equipment monitoring, in particular to a suspension potential on-line monitoring system with a voltage-sharing function.
Background
A plurality of vacuum short gaps are connected in series to form the multi-break vacuum circuit breaker, and the vacuum circuit breaker is an effective means for pushing the vacuum circuit breaker to a higher voltage grade. This directly affects the breaking capacity of the circuit breaker due to the presence of stray capacitances of the break to earth. In order to eliminate the influence of stray capacitance, a voltage-sharing capacitor is generally added to ensure the uniformity of voltage distribution between fractures. The voltage-sharing capacitor usually adopts ceramic capacitor, plug electric capacity and film capacitor, but does not all possess the voltage monitoring effect, can't realize the on-line measuring of suspension potential between the fracture, and simultaneously, the capacitor bank inner structure is complicated, and the trouble frequently appears, influences the normal operating of multi-fracture circuit breaker. Therefore, there is a need for an online monitoring system for floating potential with voltage sharing function to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a suspension potential on-line monitoring system with a voltage-sharing function
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a have suspension potential on-line monitoring system of voltage-sharing function concurrently which characterized in that includes: the remote control system comprises a resistance-capacitance voltage division device, an induction power coil, an AC/DC conversion circuit, a signal conditioning circuit, an A/D conversion circuit, a CPU, a wireless communication module, an energy storage capacitor and a remote control system.
Further, the resistance-capacitance voltage dividing device is composed of a first ceramic capacitor C1, a second ceramic capacitor C2 and a parallel resistor RL, and has the effect of enabling voltage distribution between fractures of the multi-fracture circuit breaker to be uniform, the first ceramic capacitor C1 and the second ceramic capacitor C2 are connected in series through bolts, the resistor RL is connected to two ends of the second ceramic capacitor C2 in parallel through a wiring terminal, measurement of suspension potential between fractures is achieved by using the principle of resistance-capacitance voltage division, and voltage on the resistor is input to the signal conditioning circuit.
Furthermore, the input end of the A/D conversion circuit is connected with the output end of the signal conditioning circuit, the output end of the A/D conversion circuit is connected with the CPU, and the measured voltage signal on the resistance-capacitance voltage division device is stored in the CPU.
Further, the CPU transmits the measured signal to the remote control system through the wireless communication module.
Furthermore, the induction power supply coil is connected to the input end of the AC/DC conversion circuit, and the induction power supply coil gets electricity around the main loop to charge the energy storage capacitor.
Furthermore, the energy storage capacitor provides electric energy for the AC/DC conversion circuit, the signal conditioning circuit, the A/D conversion circuit, the CPU and the wireless communication module, so that the self-contained power supply function is realized.
Furthermore, the remote control system comprises a host, a display unit, data analysis and processing software and a state alarm device. The remote control system guides the transmission signal of the wireless communication module into the data analysis and processing software through the wireless receiving module, the data analysis and processing software transmits a data processing result to the display unit through a flow chart and state estimation, and meanwhile, the state alarm device is actuated if an alarm condition is triggered by the result.
The application provides beneficial effects as follows:
(1) through a have suspension potential on-line monitoring system of voltage-sharing function concurrently, make the break voltage distribution of multi-fracture circuit breaker even, the device not only is applied to the middle of the multi-fracture circuit breaker, also can use in power equipment such as arrester, insulator according to the condition.
(2) The electric energy in the main circuit is transmitted to the energy storage capacitor through the power coil, the self-power-taking function is achieved, data acquisition is carried out by utilizing a resistance-capacitance voltage division principle, the electric energy of an acquisition system is provided by the energy storage capacitor, and the acquired signals are transmitted to a remote control room through the wireless transmission device to achieve online measurement of the suspension potential between fractures.
(3) The remote host judges the running state of the capacitor bank by analyzing and processing the acquired data, predicts the service life and realizes the state monitoring and reporting of the capacitor bank.
Drawings
FIG. 1 is a schematic diagram of a suspended potential on-line monitoring system with voltage-sharing function according to the present invention.
Fig. 2 is a schematic diagram of the remote control system of the present invention.
FIG. 3 is a flow chart of the control algorithm of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The utility model provides a have suspension potential on-line monitoring system of voltage-sharing function concurrently which characterized in that includes: the remote control system comprises a resistance-capacitance voltage division device, an induction power coil, an AC/DC conversion circuit, a signal conditioning circuit, an A/D conversion circuit, a CPU, a wireless communication module, an energy storage capacitor and a remote control system.
Referring to fig. 1-3, fig. 1 is a schematic view of a floating potential on-line monitoring system with voltage sharing function according to the present disclosure; FIG. 2 is a schematic diagram of a remote control system according to the present disclosure; fig. 3 is a schematic flow chart of a capacitor bank fault monitoring and handling method according to the present disclosure.
Particularly, have suspension electric potential on-line monitoring system of voltage-sharing function concurrently, its characterized in that includes: the remote control system comprises a resistance-capacitance voltage division device, an induction power coil, an AC/DC conversion circuit, a signal conditioning circuit, an A/D conversion circuit, a CPU, a wireless communication module, an energy storage capacitor and a remote control system.
With continued reference to fig. 1-3, the resistance-capacitance voltage divider is composed of a first ceramic capacitor C1, a second ceramic capacitor C2 and the parallel resistor RL, and has an effect of making voltage distribution between fractures of the multi-fracture circuit breaker uniform, the first ceramic capacitor C1 and the second ceramic capacitor C2 are connected in series through bolts, the resistor RL is connected in parallel at two ends of the second ceramic capacitor C2 by using a connecting terminal, measurement of suspended potential between fractures is realized by using the principle of resistance-capacitance voltage division, and voltage on the resistor is input to the signal conditioning circuit.
Further, the capacitance value of the first ceramic capacitor C1 is 1 pF;
the capacitance value of the second ceramic capacitor C2 is 999 pF;
with reference to fig. 1 to 3, the output of the signal conditioning module is connected to the input terminal of the a/D conversion module, the a/D conversion module converts the non-electric quantity and the non-standard electric signal into the standard electric signal, the output terminal of the a/D conversion circuit is connected to the CPU, and the measured voltage signal on the resistance-capacitance voltage divider is stored in the CPU.
With continued reference to fig. 1-3, the CPU transmits the measured signal to the remote control system via the wireless communication module. The wireless communication module comprises one or more of Zig-Bee, Bluetooth (Bluetooth), wireless broadband (Wi-Fi) and Ultra Wide Band (UWB).
With continued reference to fig. 1-3, the induction power coil is connected to the input end of the AC/DC conversion circuit, and the induction power coil draws power around the main circuit to charge the energy storage capacitor.
With continued reference to fig. 1-3, the energy storage capacitor provides electric energy for the AC/DC conversion circuit, the signal conditioning circuit, the a/D conversion circuit, the CPU, and the wireless communication module, thereby realizing the self-contained power supply function.
With continued reference to fig. 1-3, the remote control system includes a host, a display unit, data analysis and processing software, and a status alarm device. The remote control system guides the transmission signal of the wireless communication module into the data analysis and processing software through the wireless receiving module, the data analysis and processing software transmits a data processing result to the display unit through a flow chart and state estimation, and meanwhile, the state alarm device is actuated if an alarm condition is triggered by the result.
Referring to fig. 3, the system for monitoring the suspension potential on line with the voltage-sharing function analyzes and judges data by using a voltage measurement system, and the specific analysis process comprises the following steps:
step 1: judging whether the breaker has an opening and closing action signal or not;
step 2.1: if yes, further judging whether a voltage signal between fractures exists;
step 2.1.1: if not, further judging whether the voltage waveform is continuous;
step 2.1.1.1: if the current is not continuous, judging that the parallel capacitor bank is broken down, and alarming;
step 2.1.1.2: if the current is continuous, the circuit breaker is judged to be refused to operate, and an alarm is given;
step 2.1.2: if so, judging whether the voltage between fractures is uniform;
step 2.1.2.1: if the voltage between fractures is not uniform, judging that the voltage-sharing capacitor has internal defects or faults, and further judging whether the capacitor bank can operate with diseases or not;
step 2.1.2.1.1: if the operation can be carried out with a fault, the service life is evaluated through the capacitor bank state estimation system according to the stored data;
step 2.1.2.1.2: if the operation cannot be carried out with diseases, judging the defects of the capacitor bank and giving an alarm;
step 2.1.2.2: if the voltage distribution between fractures is uniform, judging that the fractures are normal;
step 2.2: if not, further judging whether the voltage between fractures exists;
step 2.2.1: if the voltage between fractures exists, judging that the monitoring device is abnormal, and alarming;
step 1.2.2: and if the voltage between the fractures does not exist, judging that the voltage is normal.
The embodiment can realize the on-line monitoring and early warning of the suspension potential of the multi-fracture switch, meet the requirement of voltage sharing between fractures, provide basic data support for operation, maintenance and evaluation of the multi-fracture switch, reduce maintenance workload and provide equipment operation reliability.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The utility model provides a have suspension potential on-line monitoring system of voltage-sharing function concurrently which characterized in that includes: the remote control system comprises a resistance-capacitance voltage division device, an induction power coil, an AC/DC conversion circuit, a signal conditioning circuit, an A/D conversion circuit, a CPU, a wireless communication module, an energy storage capacitor and a remote control system.
2. The system for on-line monitoring of suspended potential with voltage sharing function as claimed in claim 1, wherein the resistive-capacitive voltage divider comprises a first ceramic capacitor C1, a second ceramic capacitor C2 and the parallel resistor RLThe first ceramic capacitor C1 and the second ceramic capacitor C2 are connected in series through bolts, and the resistor R is connected in seriesLThe wiring terminals are connected in parallel at two ends of the second ceramic capacitor C2, the measurement of the suspended potential between fractures is realized by utilizing the principle of resistance-capacitance voltage division, and the voltage on the resistor is the input of the signal conditioning circuit.
3. The system according to claim 1, wherein an input terminal of the a/D converter circuit is connected to an output terminal of the signal conditioning circuit, an output terminal of the a/D converter circuit is connected to the CPU, and a voltage signal obtained by measuring the voltage across the resistive-capacitive voltage divider is stored in the CPU.
4. The system according to claim 1, wherein the CPU transmits the measured signal to the remote control system via the wireless communication module.
5. The system according to claim 1, wherein the induction power coil is connected to an input end of the AC/DC converter circuit, and the induction power coil draws power around a main circuit to charge the energy storage capacitor.
6. The system according to claim 1, wherein the energy storage capacitor supplies electric energy to the AC/DC converter circuit, the signal conditioning circuit, the a/D converter circuit, the CPU, and the wireless communication module, thereby realizing a self-powered power supply function.
7. The system according to claim 1, wherein the remote control system comprises a host, a display unit, data analysis and processing software, and a status alarm device. The remote control system guides the transmission signal of the wireless communication module into the data analysis and processing software through the wireless receiving module, the data analysis and processing software transmits a data processing result to the display unit through a flow chart and state estimation, and meanwhile, the state alarm device is actuated if an alarm condition is triggered by the result.
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| CN202011461840.XA CN112684737A (en) | 2020-12-11 | 2020-12-11 | Suspension potential on-line monitoring system with voltage-sharing function |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049058A (en) * | 1989-07-22 | 1991-02-06 | 云南省电力工业局试验研究所 | On-line overvoltage monitor for electric power system |
| CN201837712U (en) * | 2010-11-01 | 2011-05-18 | 广东电网公司茂名供电局 | Online monitoring device of HGIS (hybrid gas insulated switchgear) energy storage motor |
| CN102364655A (en) * | 2011-11-17 | 2012-02-29 | 武汉大学 | Dynamic voltage sharing device of multi-break vacuum circuit breaker and parameter selection method for dynamic voltage sharing device |
| CN102435814A (en) * | 2011-09-30 | 2012-05-02 | 中国电力科学研究院 | Device for measuring arc voltage of direct current circuit breaker |
| CN102590718A (en) * | 2012-02-22 | 2012-07-18 | 华北电力大学 | System for GIS (Global Information System) partial discharge measurement and VFTO (Very Fast Transient Overvoltage) measurement |
| CN105137158A (en) * | 2015-07-24 | 2015-12-09 | 上海君世电气科技有限公司 | Power system temporary overvoltage monitoring system |
| CN109459633A (en) * | 2018-10-31 | 2019-03-12 | 全球能源互联网研究院有限公司 | Direct-current transmission converter valve thyristor grade loop fault diagnostic method and apparatus and system |
| CN110266033A (en) * | 2019-05-29 | 2019-09-20 | 武汉大学 | The pressure emulation mode of series connection multi-break mechanical switch in hybrid dc circuit breaker |
| CN111463062A (en) * | 2020-04-27 | 2020-07-28 | 郑州大学 | Environment-friendly tank type multi-fracture vacuum circuit breaker |
-
2020
- 2020-12-11 CN CN202011461840.XA patent/CN112684737A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049058A (en) * | 1989-07-22 | 1991-02-06 | 云南省电力工业局试验研究所 | On-line overvoltage monitor for electric power system |
| CN201837712U (en) * | 2010-11-01 | 2011-05-18 | 广东电网公司茂名供电局 | Online monitoring device of HGIS (hybrid gas insulated switchgear) energy storage motor |
| CN102435814A (en) * | 2011-09-30 | 2012-05-02 | 中国电力科学研究院 | Device for measuring arc voltage of direct current circuit breaker |
| CN102364655A (en) * | 2011-11-17 | 2012-02-29 | 武汉大学 | Dynamic voltage sharing device of multi-break vacuum circuit breaker and parameter selection method for dynamic voltage sharing device |
| CN102590718A (en) * | 2012-02-22 | 2012-07-18 | 华北电力大学 | System for GIS (Global Information System) partial discharge measurement and VFTO (Very Fast Transient Overvoltage) measurement |
| CN105137158A (en) * | 2015-07-24 | 2015-12-09 | 上海君世电气科技有限公司 | Power system temporary overvoltage monitoring system |
| CN109459633A (en) * | 2018-10-31 | 2019-03-12 | 全球能源互联网研究院有限公司 | Direct-current transmission converter valve thyristor grade loop fault diagnostic method and apparatus and system |
| CN110266033A (en) * | 2019-05-29 | 2019-09-20 | 武汉大学 | The pressure emulation mode of series connection multi-break mechanical switch in hybrid dc circuit breaker |
| CN111463062A (en) * | 2020-04-27 | 2020-07-28 | 郑州大学 | Environment-friendly tank type multi-fracture vacuum circuit breaker |
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