CN103516052A - Power distribution equipment on-line monitoring early-warning terminal - Google Patents

Power distribution equipment on-line monitoring early-warning terminal Download PDF

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Publication number
CN103516052A
CN103516052A CN201310474092.2A CN201310474092A CN103516052A CN 103516052 A CN103516052 A CN 103516052A CN 201310474092 A CN201310474092 A CN 201310474092A CN 103516052 A CN103516052 A CN 103516052A
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CN
China
Prior art keywords
circuit
signal
microcontroller
line monitoring
harmonic
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Pending
Application number
CN201310474092.2A
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Chinese (zh)
Inventor
卢志勇
陈世忠
张莹
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HENAN KAIQI POWER INDUSTRY Co Ltd
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HENAN KAIQI POWER INDUSTRY Co Ltd
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Priority to CN201310474092.2A priority Critical patent/CN103516052A/en
Publication of CN103516052A publication Critical patent/CN103516052A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a power distribution equipment on-line monitoring early-warning device, in particular to a power distribution equipment on-line monitoring early-warning terminal which comprises an electric parameter collecting circuit, a signal preprocessing circuit, a single chip microcomputer system circuit, a communication circuit and an alarming circuit. The electric parameter collecting circuit comprises a transformer temperature detecting circuit, an electric leakage signal detecting circuit, a harmonic signal collecting circuit, a voltage signal collecting circuit, a current signal collecting circuit, a switch state detecting circuit and an arrester leak detection sensor. The signal preprocessing circuit comprises a harmonic detection analysis unit circuit and an electric parameter detection analysis unit circuit. Output signals of the electric parameter collecting circuits are connected into the single chip microcomputer system circuit directly or through the signal preprocessing circuit. The single chip microcomputer system circuit is connected with the communication circuit and the alarming circuit. According to the power distribution equipment on-line monitoring early-warning terminal, the working states of power distribution circuits and equipment can be known timely, and a high-reliability high-quality power utilization environment is provided for a power distribution system tail end user.

Description

Controller switching equipment on-line monitoring Forewarning Terminal
Technical field
The present invention relates to a kind of controller switching equipment on-Line Monitor Device, particularly relate to a kind of controller switching equipment operating mode on-line monitoring Forewarning Terminal.
Background technology
Distribution system belongs to the end for electricity consumption, and the running status of power distribution system equipment has directly determined power supply quality.And in traditional operational management process, the often for want of operational management of science, causes electricity consumption Frequent Accidents, as: because high-voltage insurance falls or fuse opening and low-tension fuse blow the phase-deficient operation causing, can cause three-phase power-equipment and household electrical appliance to burn; Three-phase current unbalance, can make zero line loop current increase, and Low-voltage Line Loss is increased, and even blows zero line, thereby causes abnormal overvoltage to burn household electrical appliance; The impact of the operation of distribution transformer overburden and harmonic voltage, can make transformer temperature rise increase, and even burns; High-voltage arrester punctures ground connection, can cause 10KV line tripping power failure etc.These, all directly have influence on the power supply reliability of distribution system.
Therefore, understand in time the working condition of distribution line and equipment, realize intelligent power distribution automation and detect early warning, electric power system is realized to Intellectualized monitoring significant, contribute to improve the managerial skills of distribution system, accomplish to prevent trouble before it happens, and can obtain facility information and rush towards accurately and fast scene in the very first time and carry out accident treatment, improve the reliability of power supply.
At distribution transformer, 10KV on-load switch, the block switch of operation, owing to not monitoring in real time, be substantially out of order at present, by user notification, overhauled; Such operation of power networks state, will certainly cause power supply quality low, and device damage rate is high.Therefore,, if popularize and adapt to the transformation needs of distribution system intellectuality, automation in an all-round way, can play positive impetus to distribution system technological progress.And this problem that current those skilled in the art are thinking deeply always and constantly inquiring into just.
Summary of the invention
The present invention is directed to the problem that prior art exists, propose a kind of controller switching equipment on-line monitoring Forewarning Terminal, can understand in time the working condition of distribution line and equipment, for distribution system terminal temperature difference provides highly reliable, high-quality power utilization environment;
Simultaneously, by described controller switching equipment on-line monitoring Forewarning Terminal device, it is basis, be provided to each power distribution station ,He power supply station's early warning computer and wireless communication base station and form controller switching equipment operating mode on-line monitoring early warning system, can realize intelligent power distribution automation and detect early warning.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of controller switching equipment on-line monitoring Forewarning Terminal, comprise electrical quantity Acquisition Circuit, signal pre-processing circuit, microcontroller system circuit, communicating circuit, warning circuit, electrical quantity Acquisition Circuit comprises transformer temperature testing circuit, leakaging signal detecting circuit, harmonic signal Acquisition Circuit, voltage signal acquisition circuit, current signal Acquisition Circuit, switch condition detection circuit, lightning arrester leakage detecting sensor; Described signal pre-processing circuit comprises that harmonic wave detects analytic unit circuit and electrical parameters detection analytic unit circuit; Wherein, transformer temperature testing circuit, leakaging signal detecting circuit, switch condition detection circuit, lightning arrester leakage detecting sensor output signal access respectively described microcontroller system circuit; Described harmonic signal Acquisition Circuit detects analytic unit circuit by harmonic wave and accesses described microcontroller system circuit; Described voltage signal acquisition circuit, current signal Acquisition Circuit access described microcontroller system circuit by electrical parameters detection analytic unit circuit; The PORT COM connecting communication circuit of described microcontroller system circuit, and corresponding output control terminal mouth connection warning circuit is set.
Described controller switching equipment on-line monitoring Forewarning Terminal, communicating circuit comprises wireless transmission received communication module and optical fiber communication modules, described wireless transmission received communication module adopts communication module or the mobile module of wireless self-networking, for transmitting and receiving information; Described microcontroller system circuit is realized and the communicating by letter of ancillary equipment by described fiber optic data communication module or data communication interface circuit.
Described controller switching equipment on-line monitoring Forewarning Terminal, be connected with output control terminal mouth circuit with the output of described microcontroller system circuit, microcontroller system circuit is controlled 10KV disconnect or 400V circuit breaker or the instruction of A.C. contactor break-make by described output control terminal mouth circuit output.
Described controller switching equipment on-line monitoring Forewarning Terminal, harmonic signal Acquisition Circuit is output harmonic wave signal after instrument transformer coupling, electric resistance partial pressure, capacitor filtering; Described harmonic wave detects analytic unit circuit for the harmonic signal sampling is carried out accessing microcontroller system circuit after dividing potential drop, shaping; Described electrical parameters detection analytic unit circuit adopts A/D modular converter that the voltage signal sampling, current signal, three-phase imbalance current signal are processed, and then accesses microcontroller system circuit.
The useful good effect of invention:
1, controller switching equipment on-line monitoring Forewarning Terminal of the present invention, utilize singlechip technology and wireless network communication technique and develop, can be comparatively economical, desirable realize the early warning of controller switching equipment operating state on-line monitoring, will improve the power supply reliability of power distribution network end electricity consumption.
2, controller switching equipment on-line monitoring Forewarning Terminal of the present invention; design science; complete function; for the Long-distance Control protection of controller switching equipment, control reliable, easy to use; cost performance is high; can know in time controller switching equipment real-time status and Data Detection, accelerate field accident and process, contribute to improve power supply quality.
Accompanying drawing explanation
Fig. 1 is controller switching equipment on-line monitoring Forewarning Terminal frame structure schematic diagram of the present invention;
Fig. 2 is controller switching equipment on-line monitoring Forewarning Terminal microcontroller system circuit of the present invention;
Fig. 3 is controller switching equipment on-line monitoring Forewarning Terminal output control terminal mouth circuit of the present invention.
Embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
embodiment 1
As shown in Figure 1, controller switching equipment on-line monitoring Forewarning Terminal of the present invention, comprise electrical quantity Acquisition Circuit, signal pre-processing circuit, microcontroller system circuit, communicating circuit, warning circuit, described electrical quantity Acquisition Circuit comprises transformer temperature testing circuit, leakaging signal detecting circuit, harmonic signal Acquisition Circuit, voltage signal acquisition circuit, current signal Acquisition Circuit, switch condition detection circuit, lightning arrester leakage detecting sensor; Described signal pre-processing circuit comprises that harmonic wave detects analytic unit circuit and electrical parameters detection analytic unit circuit; Wherein, transformer temperature testing circuit, leakaging signal detecting circuit, switch condition detection circuit, lightning arrester leakage detecting sensor output signal access respectively described microcontroller system circuit; Described harmonic signal Acquisition Circuit detects analytic unit circuit by harmonic wave and accesses described microcontroller system circuit; Described voltage signal acquisition circuit, current signal Acquisition Circuit access described microcontroller system circuit by electrical parameters detection analytic unit circuit; The PORT COM connecting communication circuit of described microcontroller system circuit, and corresponding output control terminal mouth connection warning circuit is set.
Communicating circuit comprises wireless transmission received communication module 116 and optical fiber communication modules 117, and described wireless transmission received communication module adopts communication module or the mobile module of wireless self-networking, for transmitting and receiving information; Described microcontroller system circuit is realized and the communicating by letter of ancillary equipment by described fiber optic data communication module or data communication interface circuit.
In figure, microcontroller system circuit 113 detects analytic unit circuit 109 with temperature signal collection circuit 102, earth leakage protective testing circuit 103, switching signal detection port circuit 107, electrical parameters detection element circuit 110, harmonic wave respectively and is connected to read parameters of electric power;
Leakaging signal detecting circuit adopts zero sequence current mutual inductor, for distribution system detection of electrical leakage.Microcontroller system circuit 113 is connected with leakaging signal detecting circuit 103; Leakaging signal detecting circuit input connects earth detector zero sequence current mutual inductor, and output connects the input of microcontroller system circuit.When electric leakage signal surpasses set point (200-500mA), by single-chip microcomputer, automatically generate Chinese short message (as: line electrical leakage or ground connection), upload to small towns power supply station early warning computer display and the electrician of small towns power supply station mobile phone, carry out electric leakage signal early warning.
Voltage signal acquisition circuit is by A, B, C three-phase alternating current output voltage signal after resistance step-down.Electrical parameters detection analysis circuit 110 is connected to read three-phase voltage signal with voltage signal acquisition circuit 105; When three-phase voltage signal surpasses set point (420-450V), by single-chip microcomputer, automatically generate Chinese short message (as: occurring abnormal overvoltage), upload to small towns power supply station early warning computer display and the electrician of small towns power supply station mobile phone, carry out abnormal voltage early warning.
Stating current signal Acquisition Circuit is by A, B, C three-phase current output current signal after current transformer, load resistance.Described electrical parameters detection analysis circuit 110 is connected to read three-phase current signal and three-phase imbalance current signal with described current signal Acquisition Circuit 106; When three-phase current or three-phase imbalance current signal surpass set point (Bu balance Du≤50%), by single-chip microcomputer, automatically generate Chinese short message (as: phenomenon of the failure: three-phase load is extremely uneven.Method for removing: the power consumption of observing designation data or the every phase line of foundation of three phase ammeter, carry out load adjustment, making it three-phase load tends to balance) upload to small towns power supply station early warning computer display and the electrician of small towns power supply station mobile phone, carry out three-phase current overcurrent or the early warning of three-phase imbalance electric current.
Harmonic signal Acquisition Circuit is output harmonic wave signal after instrument transformer coupling, electric resistance partial pressure, capacitor filtering; Described harmonic wave detects analytic unit circuit and adopts analog to digital converter that the harmonic signal sampling is carried out to dividing potential drop, shaping; Integrated electric parameter detecting element circuit is for the voltage signal sampling, current signal, three-phase imbalance current signal are analyzed, calculated.
Described harmonic wave detects analytic unit circuit 109 and is electrically connected to obtain harmonic analysis signal with described harmonic signal Acquisition Circuit 104, completes detection and the analysis of harmonic content; When three-phase current or three-phase imbalance current signal surpass set point (Bu balance Du≤50%), by single-chip microcomputer, automatically generate Chinese short message, upload to small towns power supply station early warning computer display and the electrician of small towns power supply station mobile phone, carry out three-phase current overcurrent or the early warning of three-phase imbalance electric current.
Transformer temperature signal acquisition circuit is for distribution system transformer temperature signals collecting.Microcontroller system circuit 113 is connected with described temperature signal collection circuit transducer 102, and temperature signal collection circuit transducer 102 one end are connected in distribution system transformer shell or conservator, and the other end connects the input of microcontroller system circuit 113.When transformer temperature surpasses set temperature value (80-85 ℃), by single-chip microcomputer, automatically generate Chinese short message (as: phenomenon of the failure: transformer excess temperature.Method for removing: observe whether oil starvation of transformer oil level; Observe whether excess load of ammeter.Increased transformer oil to oil level line, or adjusted cutoff load) upload to small towns power supply station early warning computer display and the electrician of small towns power supply station mobile phone, carry out transformer temperature rise early warning.
Lightning arrester leakage detecting sensor, for the detection of distribution system leakage current of an arrester.Microcontroller system circuit 113, is connected with lightning arrester leakage detecting sensor circuit 108, and lightning arrester leakage detecting sensor 108 one end are connected in earth detector zero sequence current mutual inductor, and the other end connects microcontroller system circuit 113 inputs.When leakage current of an arrester surpasses set point (≤20mA) time, by single-chip microcomputer, automatically generate Chinese short message, upload to small towns power supply station early warning computer display and the electrician of small towns power supply station mobile phone, carry out leakage current of an arrester early warning.
Switching signal detection port circuit 107 detects for the on off state of 10KV disconnect or 400V circuit breaker or A.C. contactor, the confirmation that divides, closes state to complete switch.
Microcontroller system circuit 113 and data communication interface circuit 114 have been electrically connected to and the communicating by letter of ancillary equipment; Described wireless transmission received communication modular circuit 116 is connected with described microcontroller system circuit 113, for transmitting and receiving information.
Working power rectification circuit 111 and reserve battery charging power source circuit 112 provide power supply for this terminal; Reserve battery charging power source circuit 112 comprises the charge protector of reserve battery and reserve battery; it is connected with voltage stabilizing output+5V end with described working power rectification circuit 111; can, when mains side occurs to have a power failure or cuts off the electricity supply because of fault execution, guarantee the normally operation in 24 hours of whole device.
embodiment 2
Referring to Fig. 1~Fig. 3.The controller switching equipment on-line monitoring Forewarning Terminal of the present embodiment, be with the difference of embodiment 1: microcontroller system circuit as shown in Figure 2, be connected with output control terminal mouth circuit (shown in Fig. 3) with the output of described microcontroller system circuit, microcontroller system circuit 113 is controlled 10KV disconnect or 400V circuit breaker or the instruction of A.C. contactor break-make by described output control terminal mouth circuit 115 outputs, to complete abnormal alarm and output control.Meanwhile, microcontroller system circuit 113 can automatically generate Chinese short message (being switched on or switched off state, as: combined floodgate success or separating brake success) and be uploaded to small towns power supply station computer display and the early warning of the electrician of small towns power supply station mobile phone.
Microcontroller system circuit core CPU modular circuit principle schematic is shown in Fig. 2, four I/O port WDOG of CPU, W_SO, W_CLK, W_DATA respectively with when prison storage module corresponding interface WDOG, W_SO, W_CLK, W_DATA be connected, these interfaces can be by software definition.
Transformer temperature testing circuit adopts digital temperature sensor, DQ1, the DQ2 of described digital temperature sensor output temperature signal access CPU.The input of switch condition detection circuit connects the working power of 10KV disconnect or 400V circuit breaker or A.C. contactor, and its output adopts optocoupler to realize strong and weak electricity isolation, and the switch state signal of detection connects an I/O interface of core CPU module CPU.
The core control section of output control terminal mouth circuit is controllable silicon Q1, silicon controlled input control end (CONT1) connects an I/O interface of CPU, control output end (OUT1) the control connection 10KV disconnect of output control terminal mouth circuit or the working power of 400V circuit breaker or A.C. contactor.
Take controller switching equipment on-line monitoring Forewarning Terminal of the present invention as basis, each distribution transformer is equipped with a controller switching equipment and detects Forewarning Terminal, power distribution station (power supply station's configuration early warning computer) for Yi Ge power supply station and jurisdiction thereof, by setting up wireless communication base station, can build controller switching equipment operating mode on-line monitoring early warning system.Described controller switching equipment on-line monitoring Forewarning Terminal is connected with wireless communication base station radio by wireless transmission received communication module; Described power supply station early warning computer is connected with wireless communication base station by a receiver with bi-directional communication modules.So, can be comparatively economical, desirable realize controller switching equipment operating state on-line monitoring and early warning, will improve the power supply reliability of power distribution network end electricity consumption, carry out more efficiently field accident processing, improve power supply quality.

Claims (4)

1. a controller switching equipment on-line monitoring Forewarning Terminal, comprise electrical quantity Acquisition Circuit, signal pre-processing circuit, microcontroller system circuit, communicating circuit, warning circuit, is characterized in that: described electrical quantity Acquisition Circuit comprises transformer temperature testing circuit, leakaging signal detecting circuit, harmonic signal Acquisition Circuit, voltage signal acquisition circuit, current signal Acquisition Circuit, switch condition detection circuit, lightning arrester leakage detecting sensor; Described signal pre-processing circuit comprises that harmonic wave detects analytic unit circuit and electrical parameters detection analytic unit circuit; Wherein, transformer temperature testing circuit, leakaging signal detecting circuit, switch condition detection circuit, lightning arrester leakage detecting sensor output signal access respectively described microcontroller system circuit; Described harmonic signal Acquisition Circuit detects analytic unit circuit by harmonic wave and accesses described microcontroller system circuit; Described voltage signal acquisition circuit, current signal Acquisition Circuit access described microcontroller system circuit by electrical parameters detection analytic unit circuit; The PORT COM connecting communication circuit of described microcontroller system circuit, and corresponding output control terminal mouth connection warning circuit is set.
2. controller switching equipment on-line monitoring Forewarning Terminal according to claim 1, it is characterized in that: communicating circuit comprises wireless transmission received communication module and optical fiber communication modules, described wireless transmission received communication module adopts communication module or the mobile module of wireless self-networking, for transmitting and receiving information; Described microcontroller system circuit is realized and the communicating by letter of ancillary equipment by described fiber optic data communication module or data communication interface circuit.
3. controller switching equipment on-line monitoring Forewarning Terminal according to claim 1 and 2, it is characterized in that: be connected with output control terminal mouth circuit with the output of described microcontroller system circuit, microcontroller system circuit is controlled 10KV disconnect or 400V circuit breaker or the instruction of A.C. contactor break-make by described output control terminal mouth circuit output.
4. controller switching equipment on-line monitoring Forewarning Terminal according to claim 3, is characterized in that: described harmonic signal Acquisition Circuit output harmonic wave signal after instrument transformer coupling, electric resistance partial pressure, capacitor filtering; Described harmonic wave detects analytic unit circuit for the harmonic signal sampling is carried out accessing microcontroller system circuit after dividing potential drop, shaping; Described electrical parameters detection analytic unit circuit adopts A/D modular converter that the voltage signal sampling, current signal, three-phase imbalance current signal are processed, and then accesses microcontroller system circuit.
CN201310474092.2A 2013-10-12 2013-10-12 Power distribution equipment on-line monitoring early-warning terminal Pending CN103516052A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105119373A (en) * 2015-09-01 2015-12-02 广东佛电电器有限公司 Intelligent distribution monitoring system terminal based on wireless transmission ad-hoc network
CN105974224A (en) * 2016-04-27 2016-09-28 国家电网公司 On-line monitoring system of intelligent substation 750kV GIS disconnecting link mechanism box heater
CN107462761A (en) * 2017-07-18 2017-12-12 上海海能信息科技有限公司 Distribution transforming burn-out-proof grading forewarning system method based on multivariable monitoring multi thresholds constraint
CN109141656A (en) * 2018-08-01 2019-01-04 宁国市挚友合金钢材料有限公司 A kind of Operation Condition of Power Transformers alarm
CN109489716A (en) * 2018-09-29 2019-03-19 国网辽宁省电力有限公司抚顺供电公司 Temperature and humidity control system working state monitoring instrument

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101873010A (en) * 2010-07-14 2010-10-27 河南龙杰电气有限公司 Intelligent monitoring terminal of electric distribution system
CN203562840U (en) * 2013-10-12 2014-04-23 河南开启电力实业有限公司 Power distribution equipment on-line monitoring early-warning terminal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101873010A (en) * 2010-07-14 2010-10-27 河南龙杰电气有限公司 Intelligent monitoring terminal of electric distribution system
CN203562840U (en) * 2013-10-12 2014-04-23 河南开启电力实业有限公司 Power distribution equipment on-line monitoring early-warning terminal

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105119373A (en) * 2015-09-01 2015-12-02 广东佛电电器有限公司 Intelligent distribution monitoring system terminal based on wireless transmission ad-hoc network
CN105974224A (en) * 2016-04-27 2016-09-28 国家电网公司 On-line monitoring system of intelligent substation 750kV GIS disconnecting link mechanism box heater
CN107462761A (en) * 2017-07-18 2017-12-12 上海海能信息科技有限公司 Distribution transforming burn-out-proof grading forewarning system method based on multivariable monitoring multi thresholds constraint
CN109141656A (en) * 2018-08-01 2019-01-04 宁国市挚友合金钢材料有限公司 A kind of Operation Condition of Power Transformers alarm
CN109489716A (en) * 2018-09-29 2019-03-19 国网辽宁省电力有限公司抚顺供电公司 Temperature and humidity control system working state monitoring instrument

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