CN102298106B - FPGA (field programmable gate array)-based arc monitoring system in valve hall - Google Patents

FPGA (field programmable gate array)-based arc monitoring system in valve hall Download PDF

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Publication number
CN102298106B
CN102298106B CN201110130016.0A CN201110130016A CN102298106B CN 102298106 B CN102298106 B CN 102298106B CN 201110130016 A CN201110130016 A CN 201110130016A CN 102298106 B CN102298106 B CN 102298106B
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arc
monitoring
electric arc
ethernet
arc monitoring
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CN102298106A (en
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陈凡
卫志农
孙国强
张伟
刘玉娟
韦延方
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Nanjing Hongyi Electric Automation Co., Ltd.
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Hohai University HHU
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Abstract

The invention relates to an FPGA (field programmable gate array)-based arc monitoring system in a valve hall, belonging to the field of online monitoring of electrical power systems. The system comprises a converter valve, an arc light sensor, an arc monitoring device, an Ethernet switch and an arc monitoring system background, wherein the converter valve is internally provided with the arc light sensor which is connected to the arc monitoring device by plastic optical fibers; the arc monitoring device is connected to the Ethernet switch by five types of shielding network cables or multimode optical fibers; and the Ethernet switch is connected to the arc monitoring system background by the five types of shielding network cables. The system is simple in the structure, lower in the cost, convenient to install, flexible in networking, strong in antijamming capability, and suitable for the online monitoring of converter valves in the closed valve hall with a strong electromagnetic environment.

Description

Valve Room electric arc monitoring systems based on FPGA
technical field
The present invention relates to a kind of valve Room electric arc monitoring systems based on FPGA, belong to electric system on-line monitoring field.
background technology
Since the eighties in last century, high voltage dc transmission technology obtains develop rapidly in Power System Interconnection and long-distance and large-capacity power transmission field.Because have the advantages such as irrelevant with system frequency, loss is little, transmission capacity is large, economy is outstanding, the proportion of direct current transportation in China's planning for the expansion of power grids greatly improves.HVDC converter substation is the key point that completes AC-DC conversion in DC transmission system, by the alternating current equipments such as converter power transformer, alternating-current switch equipment, alternating current filter with complete the converter valve and the valve Room, smoothing reactor, DC switch equipment, control and the protective device etc. that exchange with direct current conversion and form.These equipment layout are corresponding alternating-current switch field, the valve Room and control territory, block in station.Wherein, the valve Room is used for arranging converter valve, and converter valve is the heart of HVDC converter substation, and its safe reliability is directly determining the success or failure of direct current transportation.
The method for designing in explanation converter valve and the valve Room as an example of ± 800kV DC transmission engineering example: ± 800kV DC transmission engineering is as bipolarity wiring, every grade adopts two 12 flutter valve groups to be connected in series, each 12 flutter valve groups arrange separately a valve Room, therefore each current conversion station arranges 4 valve Rooms, in the high-pressure valve Room and the low pressure valve Room, all have 6 seat valve towers, every seat valve tower is made up of some converter valve.
Converter valve is made up of numerous thyristors, absorbing circuit, equalizing resistance, equalizing capacitance and valve reactor, single valve generally contains tens hundreds of thyristor even, and thyristor is more fragile power electronic devices, the voltage and current intensity of bearing has strict restriction, and its reliability is worth paying close attention to.Aging along with the variation of outside running environment and thyristor, converter valve is easy to break down, and power electronic devices is while breaking down, is often attended by the generation of electric arc.The valve Room is a complete airtight running environment, and the inside converter valve is numerous, after a certain device failure; although protective relaying device can rapid reaction; the primary power in the excision valve Room, the expansion of Accident prevention, is which converter valve breaks down but but can not locate.
For the orientation problem of above-mentioned converter valve fault flashing, at present mainly by estimating and detect one by one looking up the fault module.The shortcoming of this way is: some fault is without obvious cosmetic damage, and range estimation can not detect fault; Detect and waste time and energy one by one, and bring recessive damage likely to non-fault module; Repair time is long, likely causes and system oscillation affects electric power netting safe running.
summary of the invention
The invention provides a kind of valve Room electric arc monitoring systems based on FPGA, for monitoring the situation of power electronic devices generation electric arc flashover in the DC transmission system valve Room, and provide alarm signal and locating information, to solve the orientation problem of fault converter valve after the on-line monitoring of valve Room electric arc and arc fault.
The present invention adopts following technical scheme for solving its technical matters:
A valve Room electric arc monitoring systems based on FPGA, comprises converter valve, arc photosensor, Electric arc monitoring device, Ethernet switch, electric arc monitoring systems backstage; Wherein, arc photosensor is installed in converter valve, arc photosensor is connected to Electric arc monitoring device by plastic optical fiber, Electric arc monitoring device is connected to Ethernet switch by Category 5, Shielded netting twine or multimode optical fiber, and Ethernet switch is connected to electric arc monitoring systems backstage by Category 5, Shielded netting twine.
Described Electric arc monitoring device is n platform, and n is greater than 0 integer that is less than 256, and every Electric arc monitoring device can be connected with 1-16 arc photosensor by plastic optical fiber.
Described Electric arc monitoring device comprises photoelectric conversion unit, FPGA unit, 100 m ethernet interface unit, toggle switch and LED light, photoelectric conversion unit is connected with FPGA unit, toggle switch is connected to FPGA unit, LED light is by FPGA unit drives, FPGA unit and the two-way connection of 100 m ethernet interface unit.
Described FPGA unit comprises logic judgment module, message molded tissue block, ethernet control module, LED driver module and toggle switch identification module, logic judgment module is connected with message molded tissue block, toggle switch identification module provides ethernet address to message molded tissue block, message molded tissue block provides indication information to LED driver module, the two-way connection of message molded tissue block and ethernet control module, ethernet control module comprises that initialization section, message receive and message sends.
Described toggle switch identification module comprises two groups of 8 toggle switchs and 20 LED state pilot lamp, two groups of toggle switchs are set IP address and the subnet mask of the machine, and indicating device running status, device alarm status, Ethernet send state, Ethernet accepting state He16 road arc probe state to 20 LED light respectively.
Described electric arc monitoring systems backstage refers to the PC that valve Room electric arc monitoring systems software is installed, electric arc monitoring systems software is connected with each Electric arc monitoring device by Ethernet, collect the Monitoring Data of each road arc photosensor, real-time judge has or not the generation of arc fault; When arc photosensor detects arc signal, monitoring system software will provide the sound and light signal of alarm and show that Na Yi road arc photosensor detects arc signal.
Described arc photosensor adopts pure optics passive sensor, and by plastic optical fiber transmitting optical signal, photoelectric conversion section is positioned in the Electric arc monitoring device that antijamming capability is strong.
Beneficial effect of the present invention is as follows:
1, system adopts the passive arc photosensor of pure optics, and by plastic optical fiber transmitting optical signal, is not subject to electromagnetic interference (EMI), and reliability is high.
2, adopt the FPGA of pure hardware to realize logic judgement and message function of organization, with traditional C PU comparison, there is strong, the fireballing feature of antijamming capability.
3, expand multiple Electric arc monitoring devices by Ethernet switch, whole system can access at most 255 table apparatus, can connect nearly 4080 of arc photosensors, and monitoring range is large, and system architecture is flexible.
4, monitoring software can be located the position of each arc photosensor, can help the accurately converter valve of location damage of the operating maintenance personnel very first time, shortens the repair time, and Accident prevention expands.
5, system architecture is simple, and cost is lower, easy for installation, networking flexibility, and antijamming capability is strong, is suitable at strong electromagnetic environment, airtight valve Room converter valve on-line monitoring.
accompanying drawing explanation
Fig. 1 is system construction drawing of the present invention.
Fig. 2 is Electric arc monitoring device cut-away view in the present invention.
Fig. 3 is FPGA unit cut-away view in the present invention.
embodiment
Below in conjunction with accompanying drawing, the technical scheme of the invention is described in further detail:
Fig. 1 is system construction drawing of the present invention.This system comprises converter valve, arc photosensor, Electric arc monitoring device, Ethernet switch, electric arc monitoring systems backstage; Wherein, arc photosensor is installed in converter valve, arc photosensor is connected to Electric arc monitoring device by plastic optical fiber, Electric arc monitoring device is connected to Ethernet switch by Category 5, Shielded netting twine or multimode optical fiber, and Ethernet switch is connected to electric arc monitoring systems backstage by Category 5, Shielded netting twine.Converter valve can be monitored in electric arc monitoring systems backstage.The arc photosensor of one pure optics is installed in the converter valve that needs to detect, when installation, is adjusted angle, make arc photosensor the electric arc flashover that in converter valve, all corners occur can be detected.Each arc photosensor is connected with Electric arc monitoring device by plastic optical fiber, and every Electric arc monitoring device can connect at most 16 road arc photosensors.Electric arc monitoring device can directly be connected to electric arc monitoring systems backstage by ethernet line, also can be connected with backstage by Ethernet switch.Use after Ethernet switch, electric arc monitoring systems backstage can connect n platform Electric arc monitoring device, expands system monitoring scope, and n is greater than 0 integer that is less than 256.Described arc photosensor utilizes optical lens and wavelength shifter arc optical signal to be converted to the ruddiness that is adapted at transmitting in plastic optical fiber.Described electric arc monitoring systems backstage refers to the PC that valve Room electric arc monitoring systems software is installed, electric arc monitoring systems software is connected with each Electric arc monitoring device by Ethernet, collect the Monitoring Data of each road arc photosensor, real-time judge has or not the generation of arc fault; When arc photosensor detects arc signal, electric arc monitoring systems software will provide the sound and light signal of alarm and show that Na Yi road arc photosensor detects arc signal.Arc photosensor adopts pure optics passive sensor, and by plastic optical fiber transmitting optical signal, photoelectric conversion section is positioned in the Electric arc monitoring device that antijamming capability is strong.
Fig. 2 is Electric arc monitoring device cut-away view in the present invention, Electric arc monitoring device comprises photoelectric conversion unit, FPGA unit, 100 m ethernet interface unit, toggle switch and LED light, photoelectric conversion unit is connected with FPGA unit, toggle switch is connected to FPGA unit, LED light is by FPGA unit drives, FPGA unit and the two-way connection of 100 m ethernet interface unit.16 photoelectric conversion units can be connected with 16 arc photosensors by plastic optical fiber, photoelectric conversion unit comprises photodiode, current amplifier and quick comparer, be responsible for the light signal transmitting in plastic optical fiber to be converted to digital electric signal, 100 m ethernet interface unit is divided into electrical interface and optical interface two parts, can adopt Category 5, Shielded line or multimode optical fiber to be connected to higher level unit (Ethernet switch or background computer).After device powers on, first set IP address and the subnet mask of the machine according to toggle switch state, and Ethernet chip is carried out to initialization.After device is connected with higher level unit, the flicker of communications status pilot lamp; When a certain road, arc photosensor detects after arc optical signal, and corresponding arc light pilot lamp is lighted, and this lamp must just can extinguish after background computer is assigned involution order.
Fig. 3 is FPGA unit cut-away view in the present invention, FPGA unit comprises logic judgment module, message molded tissue block, ethernet control module, LED driver module and toggle switch identification module, logic judgment module is connected with message molded tissue block, toggle switch identification module provides ethernet address to message molded tissue block, message molded tissue block provides indication information to LED driver module, the two-way connection of message molded tissue block and ethernet control module, ethernet control module comprises that initialization section, message receive and message sends.Logic judgment module is responsible for the digital signal that examinations 16 photoelectric conversion units transmit, and has judged whether that arc fault produces; The result of logic judgement is organized into the Ethernet message that meets ICP/IP protocol by message molded tissue block; Ethernet control module is responsible for the initialization of Ethernet interface unit and sends receiving Ethernet message.Toggle switch identification module comprises two groups of 8 toggle switchs and 20 LED state pilot lamp, two groups of toggle switchs are set IP address and the subnet mask of the machine, and indicating device running status, device alarm status, Ethernet send state, Ethernet accepting state He16 road arc probe state to 20 LED light respectively.First logic judgment module carries out filtering to the output signal of photoelectric conversion unit, has then judged whether that arc fault occurs.In the time arc fault being detected, message molded tissue block, according to detecting that the probe sequence number of arc optical signal organizes message, sends information by message sending module, lights corresponding LED light by LED driver module simultaneously.Only, in the time that message receiver module receives the involution order of background computer, message molded tissue block will extinguish corresponding LED light.
Native system is that photoelectric sense technology, extensive programmable logic technology and High-Speed Communication Technique are combined, realize the electric arc flashover under severe electromagnetic environment has been detected and location, improve the functional reliability of intra-valve hall converter valve, reduce fault handling time, prevented the expansion of power outage.

Claims (1)

1. the valve Room electric arc monitoring systems based on FPGA, comprises arc photosensor, Electric arc monitoring device and electric arc monitoring systems backstage, also it is characterized in thatcomprise converter valve, Ethernet switch; Wherein, arc photosensor is installed in converter valve, arc photosensor is connected to Electric arc monitoring device by plastic optical fiber, Electric arc monitoring device is connected to Ethernet switch by Category 5, Shielded netting twine or multimode optical fiber, and Ethernet switch is connected to electric arc monitoring systems backstage by Category 5, Shielded netting twine; Described Electric arc monitoring device comprises photoelectric conversion unit, FPGA unit, 100 m ethernet interface unit, toggle switch and LED light, photoelectric conversion unit is connected with FPGA unit, toggle switch is connected to FPGA unit, LED light is by FPGA unit drives, FPGA unit and the two-way connection of 100 m ethernet interface unit; Described FPGA unit comprises logic judgment module, message molded tissue block, ethernet control module, LED driver module and toggle switch identification module, logic judgment module is connected with message molded tissue block, toggle switch identification module provides ethernet address to message molded tissue block, message molded tissue block provides indication information to LED driver module, the two-way connection of message molded tissue block and ethernet control module, ethernet control module comprises that initialization section, message receive and message sends; Described electric arc monitoring systems backstage refers to the PC that valve Room electric arc monitoring systems software is installed, electric arc monitoring systems software is connected with each Electric arc monitoring device by Ethernet, collect the Monitoring Data of each road arc photosensor, real-time judge has or not the generation of arc fault; When arc photosensor detects arc signal, monitoring system software will provide the sound and light signal of alarm and show that Na Yi road arc photosensor detects arc signal; Described arc photosensor adopts pure optics passive sensor, and by plastic optical fiber transmitting optical signal, photoelectric conversion section is positioned in the Electric arc monitoring device that antijamming capability is strong.
CN201110130016.0A 2011-05-19 2011-05-19 FPGA (field programmable gate array)-based arc monitoring system in valve hall Active CN102298106B (en)

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CN103809043B (en) * 2012-11-08 2016-06-08 南京南瑞继保电气有限公司 A kind of detection method of discrimination of arclight fault
CN103336223A (en) * 2013-06-14 2013-10-02 上海叠泉信息科技有限公司 Fault arc detecting and positioning system and method
CN103513650B (en) * 2013-09-24 2015-12-02 许继电气股份有限公司 The record ripple control method of converter valve opertaing device
CN104459471A (en) * 2014-12-17 2015-03-25 施耐德万高(天津)电气设备有限公司 Arc fault detection device based on POE technology
CN104953567B (en) * 2015-07-14 2017-12-01 南京中凯光电科技股份有限公司 A kind of arc light protection system and method for being used in switch cubicle feed out circuit
CN107291008A (en) * 2017-06-26 2017-10-24 北京机械设备研究所 The monitoring system and monitoring method of a kind of equipment state
CN107884690A (en) * 2017-11-14 2018-04-06 南京工程学院 GIS switch partial discharge on-line monitoring systems and method based on low-light level sensor
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Effective date of registration: 20170605

Address after: Fei Lu Yuhua Economic Development Zone in Nanjing City, Jiangsu Province, No. 12 210039

Patentee after: Nanjing Hongyi Electric Automation Co., Ltd.

Address before: 211100 Jiangsu City, Jiangning Province Development Zone, West Road, No. 8 Buddha

Patentee before: Hohai University

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Denomination of invention: FPGA (field programmable gate array)-based arc monitoring system in valve hall

Effective date of registration: 20190717

Granted publication date: 20140611

Pledgee: Nanjing Bank Co., Ltd. Nanjing North Branch

Pledgor: Nanjing Hongyi Electric Automation Co., Ltd.

Registration number: 2019320000333

Denomination of invention: FPGA (field programmable gate array)-based arc monitoring system in valve hall

Effective date of registration: 20190717

Granted publication date: 20140611

Pledgee: Nanjing Bank Co., Ltd. Nanjing North Branch

Pledgor: Nanjing Hongyi Electric Automation Co., Ltd.

Registration number: 2019320000333

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