CN203259608U - Electric energy on-line monitoring and fault diagnosing system based on digital distributed architecture - Google Patents

Electric energy on-line monitoring and fault diagnosing system based on digital distributed architecture Download PDF

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Publication number
CN203259608U
CN203259608U CN 201320214954 CN201320214954U CN203259608U CN 203259608 U CN203259608 U CN 203259608U CN 201320214954 CN201320214954 CN 201320214954 CN 201320214954 U CN201320214954 U CN 201320214954U CN 203259608 U CN203259608 U CN 203259608U
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China
Prior art keywords
monitoring
measuring unit
quality
server
power supply
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Expired - Fee Related
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CN 201320214954
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Chinese (zh)
Inventor
齐郑
饶志
张惠汐
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North China Electric Power University
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North China Electric Power University
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Priority to CN 201320214954 priority Critical patent/CN203259608U/en
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Publication of CN203259608U publication Critical patent/CN203259608U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses an electric energy on-line monitoring and fault diagnosing system based on a digital distributed architecture, which is composed of the following components: a monitoring system server, a light switch and measuring units. The monitoring system server is arranged in a master control chamber of a transformer station for receiving voltage/current signals transmitted from the measuring units, performing electric energy quality monitoring and fault diagnosing, and obtaining a Web issuing function. The light switch is also arranged in the master control chamber of the transformer station, receives and gathers the voltage/current signals transmitted from each measuring unit, and uploads to a monitoring system server. The measuring unit are arranged in 10 kVPT cabinets and wire outlet cabinets for sampling voltage and current, and performing field digitalization. The electric energy on-line monitoring and fault diagnosing system has the following advantages: mature technique, and high reliability.

Description

Based on digitizing distributed frame quality of power supply on-line monitoring and fault diagnosis system
Technical field
The utility model belongs to a kind of power technology and equipment, be applicable to 35~110kV transformer station, can carry out real-time electric energy quality monitoring to 10kV bus and circuit, breaking down when causing the quality of power supply unusual, system carries out organic combination with power quality analysis and fault diagnosis, analyse in depth the unusual generation reason of the diagnosis quality of power supply, provide decision-making foundation for further improving the quality of power supply.
Background technology
If it is excessive that the index of the quality of power supply departs from normal level; can cause the electrical equipment lost of life, network loss increasing, the possibility increase of system's generation harmonic resonance, shnt capacitor normally not to move; may cause simultaneously the non-fault sexual act of relay protection and aut.eq., it causing the instrument indication, and electric energy metrical is forbidden and computing machine, communicating by letter the series of problems such as is disturbed.Particularly along with the development of the high-new industries such as computing machine, power electronics and infotech with popularize, more and more higher requirement has been proposed the quality of power supply.
To improve the quality of power supply of electrical network, at first will make accurate determination and analysis to the quality of power supply, measure the quality of power supply level of electrical network, and analyze and judge the reason that causes various power quality problems, for the improvement of the quality of power supply provides foundation.Must according to quality of power supply standard, carry out the Continuous Tracking monitoring to voltage deviation, frequency departure, harmonic wave, voltage fluctuation and the indexs such as flickering, three-phase imbalance for large-scale interference source such as steelworks, electric railway etc.Along with the development of socioeconomic development and power industry, electric company will guarantee security, reliability and the economy of powering to improve the competitive power of self, and one of them most important measure is exactly the real time on-line monitoring quality of power supply and rapidly decision-making diagnosis.
Present equipment for monitoring power quality all adopts the microcomputer type device, need to be with the secondary cable access device of busbar voltage to be analyzed or line current.The shortcoming of this traditional sampling analysis is to lay a large amount of secondary cables, and not only wiring is complicated, and because the coupling between the secondary cable might cause secondary current, voltage data distortion, measured value has also just lost meaning.Present equipment for monitoring power quality only can be analyzed the power quality data at several intervals in addition, but can not organically the quality of power supply and fault diagnosis be combined, when the operations staff finds that the quality of power supply is defective, often need to rely on the micro-judgment reason, the decision supporting capability of equipment for monitoring power quality is not enough.
Summary of the invention
The purpose of this utility model is the deficiency that overcomes on the prior art, proposes digitizing distributed electrical energy quality on-line monitoring and fault diagnosis system.The utility model is applicable to 35~110kV transformer station, can carry out real-time electric energy quality monitoring to 10kV bus and circuit, breaking down when causing the quality of power supply unusual, system carries out organic combination with power quality analysis and fault diagnosis, analyse in depth the unusual generation reason of the diagnosis quality of power supply, provide decision-making foundation for further improving the quality of power supply.
The technical solution of the utility model is as follows:
A kind of quality of power supply on-line monitoring and fault diagnosis system based on the digitizing distributed frame, this system is by monitoring system server A, Ethernet optical switch B and measuring unit C1 ... three parts of Cn form, and it is characterized by:
The current transformer at each interval and the secondary of voltage transformer (VT) are connected to the analog converter integrated circuit board in the measuring unit of corresponding interval by secondary cable, the embedded main board in the described measuring unit is connected to the input end of Ethernet optical switch B by the fiber optic Ethernet mouth; The output terminal of described Ethernet optical switch B is connected to the input end of system server A;
Wherein, described measuring unit is installed in 10kVPT cabinet and the outgoing line cabinet, and described monitoring system server A and Ethernet optical switch B are installed in transformer station's master-control room.
The utility model also further comprises following preferred version:
The speed of described Ethernet optical switch is 2560Mbps, supports single-mode fiber and multimode optical fiber.
Be provided with voltage changer and power pack on the analog converter integrated circuit board in the described measuring unit, described analog converter integrated circuit board is connected to embedded main board in the measuring unit by the line of backboard.Embedded main board is integrated with CPU, FLASH, AD, RAM in the described measuring unit.
Described monitoring system server can also be connected to the computer terminal by LAN (Local Area Network).
Advantage of the present utility model is as follows:
1, measuring unit carries out in-situ digitalization to 10kV busbar voltage and line current signal, is transferred to the intelligence system server by Ethernet, fully guarantees real-time and accuracy in the data transmission procedure.
2, the measuring unit design has very high measuring accuracy and speed, and sampling rate can be realized the analysis demand to higher hamonic wave to 256 points/cycle.
3, technology maturation, reliability are high, breaking down when causing the quality of power supply unusual, power quality analysis and fault diagnosis are carried out organic combination, analyse in depth the unusual generation reason of the diagnosis quality of power supply, provide decision-making foundation for further improving the quality of power supply.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is measuring unit schematic diagram of the present utility model;
Fig. 3 is the fiber optic Ethernet schematic diagram of the function of this practical measuring unit.
Embodiment
, the technical solution of the utility model is described in further detail by specific embodiment such as figure below in conjunction with instructions.
Digitizing distributed electrical energy quality on-line monitoring and the fault diagnosis system that the utility model proposes, its principle is that the monitoring system measuring unit is sampled to 10kV busbar voltage and line current, be transferred to the monitoring system server by fiber optic Ethernet through optical switch, server gathers the electric parameters signal at a plurality of intervals, carries out power quality analysis and fault diagnosis.
Digitizing distributed electrical energy quality on-line monitoring and fault diagnosis system are comprised of monitoring system server, Ethernet optical switch and three parts of measuring unit.Described monitoring system server is installed in transformer station's master-control room, receives voltage, current signal that described measuring unit transmission comes, carries out electric energy quality monitoring and fault diagnosis; Described Ethernet optical switch also is installed in transformer station's master-control room, receives and gather each measuring unit to transmit voltage, the current signal that comes and be uploaded to the monitoring system server; Described measuring unit is installed in 10kVPT cabinet and the outgoing line cabinet, voltage, electric current sampled, and in-situ digitalization.Described monitoring system server gathers 10kV busbar voltage and the line current signal that measuring unit transmits, the analysis-by-synthesis fault type.The speed of described Ethernet optical switch is 2560Mbps, supports single-mode fiber and multimode optical fiber, has satisfied well the requirement of data transmission real-time.The A/D module of voltage, current signal access measuring unit is uploaded instantaneous value after being converted to digital signal by fiber optic Ethernet, guaranteed the integrality of data.Described monitoring system server has the Web issuing function, and the computer in network can be checked by browser the quality of power supply and the failure message of transformer station.
10kV busbar voltage and line current signal access measuring unit are about to mutual inductor secondary simulating signal and carry out on the spot digitizing, and digital signal is transferred to the monitoring system server by fiber optic Ethernet through optical switch.Server gathers the electric parameters signal at a plurality of intervals, when normally moving in system, monitors the operation conditions at each interval, analyzes every power quality index.Intermittence to voltage, current data changes, fluctuation catches the record ripple and information is provided, and realizes in addition insulation-monitoring function and reflects neutral point excursion and voltage-to-ground numerical value.Breaking down when causing the quality of power supply unusual, the monitoring system server starts the record ripple immediately, and power quality analysis and fault diagnosis carried out organic combination, and analyse in depth the unusual generation reason of the diagnosis quality of power supply, provide decision-making foundation for further improving the quality of power supply.
Structural representation of the present utility model as shown in Figure 1, A represents the monitoring system server, C1-Cn represents measuring unit, B represents optical switch.The measuring unit sampling rate is sampled to 10kV busbar voltage and line current to 256 points/cycle, and the secondary simulating signal is carried out digitizing on the spot, and digital signal is transferred to the monitoring system server by fiber optic Ethernet through optical switch.Server gathers the electric parameters signal at a plurality of intervals, when normally moving in system, monitors the operation conditions at each interval, analyzes every power quality index.Intermittence to voltage, current data changes, fluctuation catches the record ripple and information is provided, and realizes in addition insulation-monitoring function and reflects neutral point excursion and voltage-to-ground numerical value.Breaking down when causing the quality of power supply unusual, the monitoring system server starts the record ripple immediately, and power quality analysis and fault diagnosis carried out organic combination, and analyse in depth the unusual generation reason of the diagnosis quality of power supply, provide decision-making foundation for further improving the quality of power supply.The monitoring system server has the Web issuing function, and the computer in network can be checked by browser the quality of power supply and the failure message of transformer station.
The schematic diagram of measuring unit as shown in Figure 2, by the analog converter integrated circuit board D1 of secondary cable with the secondary simulating signal access measuring unit device of each spacing current mutual inductor and voltage transformer (VT), voltage changer A1 and power pack A2 on the integrated circuit board change voltage and current into-5V and+low-voltage simulation amount signal between the 5V, this signal is received on the embedded main board D2 by the line of backboard B.Embedded main board D2 comprises CPU, FLASH, AD, RAM, and CPU wherein carries out pre-service to digital signal, deletes misdata, then instantaneous sampling value is uploaded to monitoring system server C in real time by fiber optic Ethernet mouth Ethern.
The realization principle of the fiber optic Ethernet communication function of measuring unit as shown in Figure 3, fiber optic Ethernet is made of ethernet control chip CS8900A, 10BASE-F X conversion chip IP113A, optical fiber transceiving chip AFBR5803, and CS8900A is connected to CPU by data bus, address bus, control bus.IP113A converts the 10base-T signal to fiber-optic signal, and this signal is realized transmitting-receiving by the AFBR5803 optical fiber receiver-transmitter module, the emission of AFBR5803 and reception incoming fiber optic network.

Claims (4)

1. quality of power supply on-line monitoring and fault diagnosis system based on a digitizing distributed frame, this system is by monitoring system server A, Ethernet optical switch B and measuring unit C1 ... three parts of Cn form, and it is characterized by:
The current transformer at each interval and the secondary of voltage transformer (VT) are connected to the analog converter integrated circuit board in the measuring unit of corresponding interval by secondary cable, the embedded main board in the described measuring unit is connected to the input end of Ethernet optical switch B by the fiber optic Ethernet mouth; The output terminal of described Ethernet optical switch B is connected to the input end of system server A;
Wherein, described measuring unit is installed in 10kVPT cabinet and the outgoing line cabinet, and described monitoring system server A and Ethernet optical switch B are installed in transformer station's master-control room.
2. quality of power supply on-line monitoring according to claim 1 and fault diagnosis system is characterized in that:
The speed of described Ethernet optical switch is 2560Mbps, supports single-mode fiber and multimode optical fiber.
3. quality of power supply on-line monitoring according to claim 1 and fault diagnosis system is characterized in that:
Be provided with voltage changer and power pack on the analog converter integrated circuit board in the described measuring unit, described analog converter integrated circuit board is connected to embedded main board in the measuring unit by the line of backboard.
4. quality of power supply on-line monitoring according to claim 3 and fault diagnosis system is characterized in that:
Embedded main board is integrated with CPU, FLASH, AD, RAM in the described measuring unit.
CN 201320214954 2013-04-25 2013-04-25 Electric energy on-line monitoring and fault diagnosing system based on digital distributed architecture Expired - Fee Related CN203259608U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320214954 CN203259608U (en) 2013-04-25 2013-04-25 Electric energy on-line monitoring and fault diagnosing system based on digital distributed architecture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320214954 CN203259608U (en) 2013-04-25 2013-04-25 Electric energy on-line monitoring and fault diagnosing system based on digital distributed architecture

Publications (1)

Publication Number Publication Date
CN203259608U true CN203259608U (en) 2013-10-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103941160A (en) * 2014-05-06 2014-07-23 北京丹华昊博电力科技有限公司 Power distribution network loop closing detection device and method
CN104297681A (en) * 2014-11-03 2015-01-21 国家电网公司 High-voltage circuit breaker state online monitoring and evaluating system
CN107144761A (en) * 2017-04-17 2017-09-08 浙江瑞银电子有限公司 A kind of wiring faults detecting system and method based on sampling module

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103941160A (en) * 2014-05-06 2014-07-23 北京丹华昊博电力科技有限公司 Power distribution network loop closing detection device and method
CN103941160B (en) * 2014-05-06 2017-01-25 华北电力大学(保定) Power distribution network loop closing detection device and method
CN104297681A (en) * 2014-11-03 2015-01-21 国家电网公司 High-voltage circuit breaker state online monitoring and evaluating system
CN107144761A (en) * 2017-04-17 2017-09-08 浙江瑞银电子有限公司 A kind of wiring faults detecting system and method based on sampling module

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131030

Termination date: 20140425