Summary of the invention
The technical problem that the utility model will solve provides a kind of LTU, is difficult in time comprehensive problem of accurately gathering distribution line service data and state and being difficult to accurately locate distribution line failure to solve prior art.
For solving the problems of the technologies described above, the LTU that the utility model provides comprises electric mutual inductor: be coupled to distribution line, be used to detect the operational factor and the state of distribution line; Controller: be coupled to said electric mutual inductor, be used to calculate, analyze, store the distribution line operational factor that said instrument transformer detects; Communication module: be coupled to said controller, be used for distribution line automation terminal unit and and the back-stage management center between data interaction; Power module: be connected in said controller or be connected in said controller and communication module simultaneously, be used for to said controller or to said controller and communication module working power be provided simultaneously.
The LTU that the utility model provides can in real time, accurately, comprehensively gather the data such as electric current, voltage, power, harmonic wave of circuit through electric mutual inductor; Fault or abnormalities such as the phase fault of detection line, overcurrent, single-phase earthing, overvoltage, under-voltage, phase shortage, outage; And the state information of in time uploading track data and the utility model through communication module is to the back-stage management center; Be convenient to of the management of back-stage management center to distribution line; It is thus clear that the utility model can obviously improve the power distribution automation level, increase fail safe, stability and the reliability of distribution line.
According to a kind of preferred implementation of above-mentioned LTU, wherein, said power module comprises DC UPS that dc supply directly is provided and from the power taking module.
According to a kind of preferred implementation of above-mentioned LTU, wherein, said DC UPS is a valve-regulated lead-acid battery, and is connected to accept said charging from the power taking module from the power taking module with said.
According to a kind of preferred implementation of above-mentioned LTU, wherein, said is transformer from the power taking module.
According to a kind of preferred implementation of above-mentioned LTU, wherein, also comprise on-pole switch, be connected in said controller and distribution line, be used for disconnection and conducting according to the commands for controlling distribution line of said controller.
According to a kind of preferred implementation of above-mentioned LTU, wherein, also comprise memory module, be connected in said controller, be used to expand the memory capacity of said controller.
A kind of preferred implementation according to above-mentioned distribution line automation terminal unit; Wherein, Also comprise input/output module, be connected in said controller, be used for the input operation instruction and export the data of the state parameter of this distribution line automation terminal unit, the processing of said controller or storage.
According to a kind of preferred implementation of above-mentioned LTU, wherein, said input/output module is display screen and keyboard, perhaps is touch-screen.
A kind of preferred implementation according to above-mentioned LTU; Wherein, Also comprise alarm module, be coupled to said controller, be used for receiving the instruction of said controller and sending alarm signal when distribution line failure or this distribution line automation terminal unit break down when taking place.
According to a kind of preferred implementation of above-mentioned LTU, wherein, said communication module comprises optical fiber communication module and GPRS communication module.
The accompanying drawing that will combine the utility model below carries out clear, intactly description to the technical scheme of the utility model, and obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Be difficult to the accurately comprehensive problem of gathering the distribution line data and being difficult to accurate failure judgement position in order to solve prior art, the utility model provides a kind of distribution line automation terminal unit.
Fig. 1 schematically shows the topological structure and the application mode thereof of the utility model preferred embodiment; What need explanation in advance is; " couple " and include but not limited to " physical connection "; Can connect through cable between controller 2 for example shown in Figure 1 and the communication module 8, also can be through the mode " connection " of photoelectricity coupling or electromagnetic coupled.As shown in Figure 1, the distribution line automation terminal unit preferred embodiment 1 of the utility model comprises controller 2, electric mutual inductor 5, power module 7 and communication module 8.Wherein electric mutual inductor 5 is coupled to distribution line 11, is used to detect the operational factor and the state of distribution line 11.Controller 2 is coupled to electric mutual inductor 5 and communication module 8; Be mainly used in calculating, analysis, storage distribution line operational factor, also be used to receive and instruction that executive communication module 8 transmits and control electric mutual inductor 5, communication module 8, power module 7 and other can improve the operation sequential of the functional module of this preferred embodiment LTU.Communication module 8 be used for this preferred embodiment and and back-stage management center 13 between data interaction; Communication module 8 is through setting up contact channel between communication network 12 and the back-stage management center 13, and it can also communicate with other terminal units through this communication network 12.Power module 7 is connected in controller 2 and communication module 8 simultaneously, is used to the two working power is provided.Because the output port of controller 2 has certain voltage level, therefore in other embodiments, power module can not be connected with communication module, but directly to communication module working power is provided by the output port of controller.
In this preferred embodiment, electric mutual inductor 5 is primary equipments of gathering distribution overhead transmission line three-phase voltage and electric current, and it is in order to gather the electric current and voltage of distribution line 11 simultaneously.Compare with electromagnetic transformer, electric mutual inductor has advantages such as measuring range is wide, application mode is flexible, volume is little, energy consumption is low, purposes is various in this preferred embodiment.Controller 2 is the central processing unit of this preferred embodiment LTU, and it not only can receive the analog quantity input, can also the receiving key amount import, and it is responsible for realizing functions such as DATA REASONING, fault judgement, information uploading, storage, Long-distance Control.Utilize electric mutual inductor 5 to measure three-phase current, voltage, residual voltage and the zero-sequence currents etc. of distribution lines 11 in real time, controller 2 is through internal calculation, obtains the parameters such as active power, reactive power, power factor, harmonic component of circuit.Wherein directly the measurement of overhead transmission line zero-sequence current and residual voltage being exported the three-phase synthesis mode through electric mutual inductor 5 secondaries obtains.The chip of controller 2 can be DSP (Digital Signal Processor; Digital signal processor), single-chip microcomputer, FPGA (Field-Programmable Gate Array; Field programmable gate array), ASIC (Application Specific Integrated Circuit, application-specific integrated circuit (ASIC)) etc., be good especially with 32 bit DSPs; And preferably adopt embedded real-time operating system, can better guarantee real-time and the multitasking operated like this.Communication module 8 is the passages at contact this preferred embodiment LTU and back-stage management center 13; Can take but be not limited to the optical fiber communication two kinds of patterns of communicating by letter with GPRS; For example the communication module 8 of this preferred embodiment comprises optical fiber communication module and GPRS (General Packet Radio Service; General packet radio service) the communication module (not shown) is carried out data interaction to pass through fiber optic network and/or GSM (Global System for Mobile Communications, global system for mobile communications) network and back-stage management center 13.
In order to improve the power supply reliability of power module 7, the power module 7 of this preferred embodiment comprises DC UPS that dc supply directly is provided and from the power taking module.Wherein DC UPS is preferably the battery that discharges and recharges capable of circulation, from the power taking module can for solar panel, small-sized wind power generator or utilize the magnetic field of distribution line carry out from power taking coil, utilize the electric field of distribution line carry out from power taking electric capacity, be connected directly to distribution line and carry out from the transformer of power taking etc.The DC UPS of the power module 7 of this preferred embodiment is valve-regulated lead-acid battery 71 and is transformer 72 from the power taking module; Valve-regulated lead-acid battery 71 and transformer 72 interconnection; Can make like this transformer 72 directly or the rectification circuit through power module 7 etc. indirectly to valve-regulated lead-acid battery 71 chargings, to replenish the electric energy of outage valve-regulated lead-acid battery 71 consumes.Transformer 72 can be a single-phase transformer, and it is input as the line voltage of two phase circuits, and is as shown in Figure 1; Transformer 72 is directly connected in distribution line 11; If in the 10KV system, be input as 10KV, be output as the 220V/110V AC power; And then to controller 2 and communication module 8 working power being provided via being arranged at rectification circuit in the power module 7, filter circuit etc., it can provide operating power to on-pole switch 6 described below.Non-maintaining valve-regulated lead-acid battery 71 can be under the situation of line outage; For controller 2, communication module 8 etc. provides working power; Guarantee that this preferred embodiment LTU can continuous operation, and in this preferred embodiment, electric mutual inductor 5 is connected in all before the on-pole switch 6 with transformer 72; Can guarantee that like this transformer 72 still can be obtained electric energy from power distribution circuit 11 after on-pole switch 6 breaks off.Power module 7 (also can 2 pairs of batteries of setting controller control) can carry out activation control, protection excision, all fills/floating charge control etc. it according to the charging and discharging curve of valve-regulated lead-acid battery 71; Make valve-regulated lead-acid battery 71 be operated in optimum state to greatest extent, reasonably control it and discharge and recharge the degree of depth.
In existing distribution line; The part circuit has been provided with on-pole switch; The utility model can cooperate with the on-pole switch that distribution line has been installed; Back-stage management center 13 can through the utility model Long-distance Control on-pole switch deciliter, through the parameter of setting controller 2, the utility model can be controlled switch on two or the many important actors.After having confirmed the accurate scope of fault, through the remote control on-pole switch, isolate fault section out, recover the power supply of other fault-free sections, so can significantly improve economic benefit and social benefit.For the distribution overhead transmission line that on-pole switch is not set as yet; Simultaneously in order to increase the integrated advantage of this preferred embodiment LTU; This preferred embodiment LTU can also comprise on-pole switch 6; It is connected between controller 2 and the distribution line 11, is used for disconnection and conducting according to the commands for controlling distribution line 11 that is directly sent by controller 2.Also promptly, this preferred embodiment has relay output function and switching value input function, the state of the separating brake of control on-pole switch and combined floodgate, sense switch, and upload on off state information.
The controller 2 of this preferred embodiment LTU has complete Data Detection and memory function; For example can detect and store operational factor, SOE (the Sequence Of Event of distribution line integral point; Event sequence), the out-of-limit data of parameter, on off state displacement, the true remote signalling information of system, fault generation, system running state information; Can also store that alarm, device power on, install that power down, device reset, signal resets, straighforward operation, modification definite value, self-check of device mistake, fault current size and take place constantly, moment that remote control takes place; Information such as the time of state and type, remote signalling displacement and state, and can this category information be sent to back-stage management center 13 through communication module 8 and be beneficial to 13 judgements of back-stage management center and decision-making.Above-mentioned various information can be kept in the non-volatile memory cells of controller 2, to guarantee that power down keeps and support remote inquiry historical data, is convenient to back-stage management center 13 and analyzes.In order to expand the memory capacity of this preferred embodiment LTU, be provided with the memory module 4 that is connected in controller 2 among this preferred embodiment LTU, memory module 4 can for but be not limited to a nonvolatile memory, for example the SD card can also be expansion slot or interface.
This preferred embodiment LTU also comprises the input/output module 9 that is connected in controller 2; State parameter, the controller 2 that is used for input operation instruction and exports this preferred embodiment LTU handled or the data of storage etc., for example supports the on-the-spot operations such as parameter, operation on-pole switch 6, inquiry SOE of revising.Input/output module 9 can for but be not limited to display screen and keyboard, perhaps touch-screen.
In order to confirm the fault occurrence positions intuitively; This preferred embodiment LTU also comprises alarm module 3, and it is coupled to controller 3, when distribution line 11 breaks down or this preferred embodiment LTU when breaking down; Except controller 2 is uploaded to back-stage management center 13 with fault message through communication module 8; This alarm module 3 can also implementation controller 2 instruction and send alarm signal, report to the police on the spot, be convenient to administrative staff and search abort situation.
This preferred embodiment LTU can also comprise a clock (not shown), with the remote control of accepting back-stage management center 13 through communication module 8 to the time, guarantee the clock synchronization of data.
In sum, the utility model can be realized overhead transmission line remote measurement, remote signalling, remote control and remote regulating.For example: gather the data such as electric current, voltage, power, harmonic wave of circuit in real time, the data of collection can second in time be uploaded for chronomere, for power distribution automation provides the data support; The accurate failure condition that takes place of detection line comprises fault or abnormalities such as phase fault, overcurrent, single-phase earthing, overvoltage, under-voltage, phase shortage, outage, and realizes that fault accurately locatees, and for improving power supply reliability technical support is provided; Can cooperate with on-pole switch, the back-stage management center can the Long-distance Control on-pole switch deciliter, after the accurate scope of definite fault, through the remote control on-pole switch, isolates fault section out, recovers the power supply of other fault-free sections; The bringing onto load change of overhead transmission line institute is big; Track remodelling is frequent, and the transmission power of circuit and supplier of electricity are to frequent change, so the numerical value of failure judgement needs to change thereupon; These changes can be used flexibly through the utility model by back-stage management center remotely changing.In a word, the utility model not only can improve the power distribution automation level, and can increase fail safe, stability and the reliability of distribution.
The above; Be merely the embodiment of the utility model; But the protection range of the utility model is not limited thereto; Any technical staff who is familiar with the present technique field can expect changing or replacement in the technical scope that the utility model discloses easily, all should be encompassed within the protection range of the utility model.Therefore, the protection range of the utility model should be as the criterion by said protection range with claim.