CN102608401A - Measurement system and measurement method for disturbance voltage and disturbance current of GIS (gas insulated switchgear) secondary system - Google Patents

Measurement system and measurement method for disturbance voltage and disturbance current of GIS (gas insulated switchgear) secondary system Download PDF

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Publication number
CN102608401A
CN102608401A CN2012100575438A CN201210057543A CN102608401A CN 102608401 A CN102608401 A CN 102608401A CN 2012100575438 A CN2012100575438 A CN 2012100575438A CN 201210057543 A CN201210057543 A CN 201210057543A CN 102608401 A CN102608401 A CN 102608401A
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China
Prior art keywords
voltage
pipelines
current
gis
probe
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CN2012100575438A
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Chinese (zh)
Inventor
崔翔
胡榕
陈维江
马其燕
张卫东
齐磊
陈沛龙
戴敏
时卫东
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
North China Electric Power University
State Grid Electric Power Research Institute
Original Assignee
State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
North China Electric Power University
State Grid Electric Power Research Institute
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Priority to CN2012100575438A priority Critical patent/CN102608401A/en
Publication of CN102608401A publication Critical patent/CN102608401A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a measurement system and a measurement method for disturbance voltage and disturbance current of a GIS (gas insulated switchgear) secondary system, which belong to the field of measurement of disturbance voltage and disturbance current. The measurement system for disturbance voltage and disturbance current is all shielded so as to reduce measurement errors caused by external electromagnetic interference. The invention has the advantages that a shielding method and a shielding device for measuring disturbance voltage and disturbance current of a substation secondary system are provided, influence of field electromagnetic disturbance of substation GIS equipment on measurement of the disturbance voltage and disturbance current of the secondary system can be greatly reduced, measurement accuracy is improved, and the field measurement method and the field measurement system for disturbance voltage and disturbance current of the substation GIS equipment secondary system are provided.

Description

The measuring system and the method for GIS electrical secondary system disturbance voltage and harassing and wrecking electric current
Technical field
The invention belongs to disturbance voltage and harassing and wrecking current measurement field; Be particularly related to the measuring system and the method for GIS electrical secondary system disturbance voltage and harassing and wrecking electric current, relate in particular under the complex electromagnetic environment the electromagnetic screen of gas-insulated switchgear electrical secondary system disturbance voltage with the harassing and wrecking current measurement system.
Background technology
It is little that gas-insulated switchgear in the AC input transformation system (GIS) has floor area, and good airproof performance is affected by environment little; Operational reliability is high; Time between overhauls(TBO) is long, and maintenance workload is few, the low remarkable advantage that waits of operating cost; Electrical network has obtained widespread use in China, and successful Application to the southeast-Nanyang, Shanxi-Jingmen extra-high voltage experiment and demonstration engineering and in the Huainan of building-Shanghai extra-high-voltage alternating current engineering.When the disconnector among the GIS, grounding switch and breaker operator, produce the very steep capable ripple of wave head, the row ripple is in GIS external communication and radiation formation electromagnetic transient process and shell transient process.The transient electromagnetic field that electromagnetic transient process produces will be coupled into electrical secondary system through space radiation; The shell transient process can make the current potential of GIS shell raise, and shell potential rise height is coupled to electrical secondary system through being connected conduction such as equipment such as transmission controlling mechanism on GIS shell or the bus, density monitor, current transformer, voltage transformer (VT); These transient processes produce disturbance voltage on electrical secondary system, if electrical secondary system constitutes the loop, then can on the loop, form the harassing and wrecking electric current.The insulation that too high disturbance voltage, harassing and wrecking electric current can destroy electrical secondary system influence the operate as normal of electrical secondary system, can damage and burn electrical secondary system in the time of seriously.Therefore, be necessary the disturbance voltage of electrical secondary system is effectively measured with the harassing and wrecking electric current.
At present domestic also do not have the given GIS of transformer station equipment electrical secondary system disturbance voltage and harass the current measurement standard.The electric pressure of AC input transformation system is high, and the GIS device structure is complicated in the transformer station, and switching manipulation produces very strong Transient Electromagnetic harassing and wrecking around GIS equipment, and the on-the-spot GIS equipment control cabinet that contains electrical secondary system is placed near the GIS equipment.The Transient Electromagnetic harassing and wrecking bring very big interference to the electrical secondary system disturbance voltage of not considering electromagnetic shielding measure with harassing and wrecking electric current in-site measurement system; The measurement result that obtains can depart from actual actual value; Cause measurement result insincere; Therefore meeting damage on-site measuring system is necessary the in-site measurement system is taked electromagnetic shielding measure during serious interference.The present invention provides the on-site measurement method of a kind of electrical secondary system disturbance voltage with the harassing and wrecking electric current; Consider electromagnetic shielding measure; And develop one based on this on-site measurement method and overlap the in-site measurement system, can under complex electromagnetic environment, accurately measure electrical secondary system disturbance voltage and harassing and wrecking electric current.
Summary of the invention
The present invention is directed to above-mentioned defective and disclose measuring system and the method for GIS electrical secondary system disturbance voltage with the harassing and wrecking electric current.
GIS electrical secondary system disturbance voltage is following with the structure of the measuring system of harassing and wrecking electric current: secondary cable is connected the input end of secondary device and current probe respectively; One end of measuring lead wire connects the common node of secondary cable and secondary device, and the other end connects the input end of voltage probe; The output terminal of voltage probe all is connected CPU with the output terminal of current probe; CPU is connected storage, optical fiber communication unit and inverter respectively; The optical fiber communication unit is connected storage and inverter respectively; The optical fiber communication unit connects the remote optical fiber communication unit through optical fiber, and computing machine connects the remote optical fiber communication unit, and electric battery connects inverter; On-the-spot GIS equipment control cabinet ground connection;
First connector, metal tube and the 3rd connector are assembled together; On-the-spot GIS equipment control cabinet is assembled together through above-mentioned three and shielded box, and second metallic network of pipelines passes first connector, metal tube and the 3rd connector successively, and the right-hand member of second metallic network of pipelines connects shielded box through connecting line; Shielded box is divided into following three layers from top to bottom: shielded cubicle, second layer cell and the 3rd layer of cell; Separate with insulating material between above-mentioned three layers, between shielded cubicle and the second layer cell perforate is set, second connector is installed in the perforate; Shielded box is processed by single-layer metal, and the wrapped with insulation between shielded cubicle and second layer cell single-layer metal; Electric battery and inverter are fixed in the second layer cell, and CPU, storer and optical fiber communication unit are fixed in the 3rd layer of cell, and remote optical fiber communication unit and computing machine are installed in the screened room of a distant place; Current probe is contained in the secondary shielding box, and the left end of second metallic network of pipelines fits over secondary shielding is box-packed, and the output terminal of current probe and the lead between the CPU pass second metallic network of pipelines and second connector successively.
In the time of in voltage probe is installed in on-the-spot GIS equipment control cabinet; Voltage probe is contained in first shielding box; First metallic network of pipelines passes first connector, metal tube and the 3rd connector successively; The right-hand member of first metallic network of pipelines connects shielded box through connecting line; The left end of first metallic network of pipelines and first shielding box are assembled together, and the output terminal of voltage probe and the lead between the CPU pass first metallic network of pipelines and second connector, and secondary device, voltage probe and current probe all are fixed in the on-the-spot GIS equipment control cabinet;
In the time of in voltage probe is installed in shielded cubicle; The 3rd metallic network of pipelines passes first connector, metal tube and the 3rd connector successively; The left end of the 3rd metallic network of pipelines suspends; Right-hand member connects shielded box through connecting line, and measuring lead wire is passed the 3rd metallic network of pipelines, and the output terminal and the lead between the CPU of voltage probe pass second connector.
The outside of said first metallic network of pipelines, second metallic network of pipelines and the 3rd metallic network of pipelines all is covered with insulation course.
The outside surface of the single-layer metal of said shielded box is pasted heat-barrier material, and inside surface is pasted insulating material;
Two sides are installed the load-bearing handle respectively about said shielded box, and two insulation columns are installed in the bottom of shielded box;
Grading ring is installed at the top of said shielded box;
Said shielding chamber door is installed in the place ahead of shielded box, the welding manner of folding formula in the shielding chamber door adopts, the welding of folding formula in the shielded box door closure adopts, weld metal reed around the shielded box door closure.
GIS electrical secondary system disturbance voltage may further comprise the steps with the on-site measurement method of harassing and wrecking electric current;
1) voltage probe and current probe are gathered the transient state disturbance voltage and the transient state harassing and wrecking electric current of GIS electrical secondary system respectively; Voltage probe is exported low amplitude value transient voltage signal with the amplitude transient state disturbance voltage signal of input according to the given intrinsic standoff ratio decay of voltage probe; Current probe according to the given conversion specific output low amplitude value transient current signal of current probe, inputs to the harassing and wrecking of the amplitude transient state in loop current signal in the CPU with low amplitude value transient voltage signal and low amplitude value transient current signal;
2) under the control of computing machine; CPU acquisition and recording low amplitude value transient voltage signal and low amplitude value transient current signal; Data storage after will writing down then is in storer; Actual disturbance voltage equals the low amplitude value transient voltage and multiply by intrinsic standoff ratio, and actual harassing and wrecking electric current equals the low amplitude value transient current and multiply by the conversion ratio;
When 3) data of CPU after judging record satisfied specified conditions, the result that will analyze through optical fiber communication unit, optical fiber and remote optical fiber communication unit was sent in the computing machine;
When the disturbance voltage of GIS electrical secondary system is measured with the harassing and wrecking electric current; Grading ring has improved the Electric Field Distribution around the shielded box top; Avoided the generation of corona; Heat-barrier material avoids the shielded box inner electronic equipment to receive the influence of external high temperature bitter cold, and insulating material avoids the shielded box inner electronic equipment to receive the influence of casing current potential, and distant place screened room avoids electromagnetic interference (EMI) to remote optical fiber communication unit and computing machine influence; Electric battery output AC electricity after the inverter inversion provides AC power for CPU, storer and optical fiber communication unit; First connector and the 3rd connector are used to reduce the interference of external electromagnetic field to first metallic network of pipelines, second metallic network of pipelines and the 3rd metallic network of pipelines, and first metallic network of pipelines reduces the influence of electromagnetic interference (EMI) to the voltage probe output line, and second metallic network of pipelines reduces the influence of electromagnetic interference (EMI) to the current probe output line; The 3rd metallic network of pipelines reduces the influence of electromagnetic interference (EMI) to measuring lead wire; The secondary shielding box reduces the influence of electromagnetic interference (EMI) to current probe, and first shielding box reduces the influence of electromagnetic interference (EMI) to voltage probe, and shielded cubicle reduces the measuring lead wire electromagnetic interference (EMI) to be influenced the data process control system.
Said specified conditions are meant: GIS electrical secondary system disturbance voltage surpasses the withstand voltage limit value of GIS electrical secondary system; Perhaps GIS electrical secondary system harassing and wrecking electric current surpasses the withstand current limit value of GIS electrical secondary system; Perhaps the GIS electrical secondary system disturbance voltage number of times that surpasses the withstand voltage limit value of GIS electrical secondary system reaches the voltage tolerance number of times of GIS electrical secondary system, and perhaps the GIS electrical secondary system harassing and wrecking electric current withstand current limit value that surpasses the GIS electrical secondary system reaches electric current tolerance number of times.
Beneficial effect of the present invention is: screen method and the shield assembly of measuring transformer station secondary system disturbance voltage and harassing and wrecking electric current are provided; The influence that the electromagnetic disturbance that can reduce the GIS of transformer station device context greatly brings electrical secondary system disturbance voltage and harassing and wrecking current measurement; Improved the accuracy of measuring, on-site measurement method and the measuring system of a kind of GIS of transformer station equipment electrical secondary system disturbance voltage with the harassing and wrecking electric current are provided.
Description of drawings
Figure 1A is first synoptic diagram of the GIS electrical secondary system disturbance voltage and the in-site measurement system of harassing and wrecking electric current;
Figure 1B is second synoptic diagram of the GIS electrical secondary system disturbance voltage and the in-site measurement system of harassing and wrecking electric current;
Fig. 2 A is the overlapping edges of shielded box and first synoptic diagram of door closure shielding processing
Fig. 2 B is the overlapping edges of shielded box and second synoptic diagram of door closure shielding processing;
Fig. 2 C is the synoptic diagram that concerns of shielding chamber door and shielded box.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explain, should be emphasized that, following explanation only is exemplary, rather than in order to limit scope of the present invention and application thereof.
The present invention all shields the measuring system of disturbance voltage with the harassing and wrecking electric current, to reduce outside electromagnetic interference (the particularly electromagnetic interference (EMI) of GIS equipment) institute's errors caused
Shown in Figure 1A-Figure 1B; GIS electrical secondary system disturbance voltage is following with the structure of the measuring system of harassing and wrecking electric current: secondary cable 113 is connected the input end (current probe 115 input ends pincers are enclosed within the loop of secondary cable 113 and secondary device 112 formations) of secondary device 112 and current probe 115 respectively; One end of measuring lead wire 116 connects the common node of secondary cable 113 and secondary device 112, and the other end connects the input end of voltage probe 114; The output terminal of the output terminal of voltage probe 114 and current probe 115 all is connected CPU 118; CPU 118 is connected storage 119, optical fiber communication unit 120 and inverter 124 respectively; Optical fiber communication unit 120 is connected storage 119 and inverter 124 respectively; Optical fiber communication unit 120 (being used for and PERCOM peripheral communication) is connected remote optical fiber communication unit 141 through optical fiber 121, and computing machine 122 connects remote optical fiber communication unit 141, and electric battery 125 connects inverter 124; On-the-spot GIS equipment control cabinet 111 ground connection;
First connector 127, metal tube 126 and the 3rd connector 138 are assembled together, and (first connector 127 is installed in the right-hand member of on-the-spot GIS equipment control cabinet 111; The 3rd connector 138 is installed in the left end of shielded box 133); On-the-spot GIS equipment control cabinet 111 is assembled together through above-mentioned three and shielded box 133; Guarantee that on-the-spot GIS equipment control cabinet 111 is consistent with shielded box 133 current potentials; Second metallic network of pipelines 146 passes first connector 127, metal tube 126 and the 3rd connector 138 successively; The right-hand member of second metallic network of pipelines 146 connects shielded box 133 through connecting line 129, and shielded box 133 is divided into following three layers from top to bottom: shielded cubicle 131, second layer cell 144 and the 3rd layer of cell 145 separate with insulating material 139 between above-mentioned three layers; Between shielded cubicle 131 and the second layer cell 144 perforate is set; Second connector 137 is installed in the perforate, and shielded box 133 is processed by single-layer metal, and the insulating material 139 between shielded cubicle 131 and second layer cell 144 is wrapped in single-layer metal; Electric battery 125 is fixed in the second layer cell 144 with inverter 124; CPU 118, storer 119 and optical fiber communication unit 120 are fixed in the 3rd layer of cell 145; Avoided moving of instrument and equipment in the measuring process; Remote optical fiber communication unit 141 is installed in the distant place screened room 142 with computing machine 122; Current probe 115 is contained in the secondary shielding box 143; The left end of second metallic network of pipelines 146 and secondary shielding box 143 are assembled together, and the lead between the output terminal of current probe 115 and the CPU 118 passes second metallic network of pipelines 146 and second connector 137 successively.
In the time of in voltage probe 114 is installed in on-the-spot GIS equipment control cabinet 111; Voltage probe 114 is contained in first shielding box 130; First metallic network of pipelines 128 passes first connector 127, metal tube 126 and the 3rd connector 138 successively; The right-hand member of first metallic network of pipelines 128 connects shielded box 133 through connecting line 129; The left end of first metallic network of pipelines 128 and first shielding box 130 are assembled together, and the lead between the output terminal of voltage probe 114 and the CPU 118 passes first metallic network of pipelines 128 and second connector 137, and secondary device 112, voltage probe 114 and current probe 115 all are fixed in the on-the-spot GIS equipment control cabinet 111;
In the time of in voltage probe 114 is installed in shielded cubicle 131; The 3rd metallic network of pipelines 147 passes first connector 127, metal tube 126 and the 3rd connector 138 successively; The left end of the 3rd metallic network of pipelines 147 suspends; Right-hand member connects shielded box 133 through connecting line 129; Guarantee that an end and shielded box 133 current potentials that the 3rd metallic network of pipelines 147 is positioned at shielded box 133 are consistent, measuring lead wire 116 is passed the 3rd metallic network of pipelines 147, and the lead between the output terminal of voltage probe 114 and the CPU 118 passes second connector 137.
If voltage probe 114 is placed in the on-the-spot GIS equipment control cabinet 111, measuring lead wire 116 preferably as far as possible short.Preferably, this section lead-in wire is also taked shielding measure, as adopting shielded cable.In order further to reduce effect of electromagnetic radiation, preferred wire length is less than 50 centimetres.If voltage probe 114 is placed in the shielded box 133; Voltage probe 114 need not be contained in the shielding box 130, and in order to reduce the influence of wire length to the disturbance voltage waveform, preferred wire length is less than 2 meters; It is short more to go between, and can guarantee that the disturbance voltage waveform that measures is undistorted more.
Voltage probe 114 can comprise polytype voltage probe.In one embodiment, can use resistive impedance branch pressure voltage probe.The rising edge of GIS electrical secondary system disturbance voltage be tens nanosecond rank, frequency can reach tens, amplitude can reach tens kilovolts voltage signal; The major parameter of the voltage probe that can select is: maximum high-voltage: (just direct current is 20kV to 20kV DC/40kV peak value; Transient voltage peak is 40kV); Bandwidth: 100MHz, the rise time: 3.5nS.In another embodiment, can directly use can the commercial voltage probe that obtains, and for example: Tyke (Tektronix) P6015A high-voltage probe, article cause (pintech) P6039A high-voltage probe.Voltage probe 114 can also comprise that other suitable being used to measure the probe type of GIS electrical secondary system disturbance voltage, for example, and the capacitive partial pressure voltage probe.
Current probe 115 can comprise polytype current probe.In one embodiment, the major parameter of the current probe that can select is: maximum current: 10A effective value/500A peak value (just current effective value is 10A, and the transient current peak value is 500A), bandwidth: 400Hz~100MHz, rise time: 5nS.In another embodiment, can directly use can the commercial current probe that obtains, for example: PEARSON CURRENT model 6585, PEARSON CURRENT model 6595.Current probe 115 can also comprise that other suitable being used to measure the probe type of GIS equipment electrical secondary system harassing and wrecking electric current.
CPU 118, storer 119, optical fiber communication unit 120, inverter 124, electric battery 125, optical fiber 121, remote optical fiber communication unit 141 composition data process control systems.
The outside of said first metallic network of pipelines 128, second metallic network of pipelines 146 and the 3rd metallic network of pipelines 147 all is covered with insulation course.First metallic network of pipelines 128, second metallic network of pipelines 146 and the 3rd metallic network of pipelines 147 all use metal level or wire netting to process, for example metallic copper, or zinc-plated metallic iron metal tube or the wire netting processed.First connector 127, second connector 137, the 3rd connector 138 and metal tube 126 can be processed by above-mentioned material (metallic copper, or zinc-plated metallic iron metal tube or the wire netting processed).First shielding box 130 and secondary shielding box 143 also can be processed by above-mentioned material (metallic copper, or zinc-plated metallic iron metal tube or the wire netting processed), for example, can use the galvanized iron of 2 millimeters thick to make shielding box, adopt solder technology at seam crossing.The shape of first shielding box 130 and secondary shielding box 143 can adopt any suitable shapes, is used to hold measurement mechanism wherein.Preferably, first shielding box 130 and secondary shielding box 143 is shaped as cuboid.
The outside surface of the single-layer metal of said shielded box 133 is pasted heat-barrier material 135, and inside surface is pasted insulating material 139;
Preferably, grading ring 132 materials are aluminium alloys, and insulating material 139 is selected epoxy resin for use, and heat-barrier material 135 is selected the glass fibre cotton plate for use, and distant place screened room 142 is transformer station's scene protection cell.In addition, according to actual conditions, can select other.
For convenient measurement and insulation safety consideration, two sides are installed load-bearing handle 136 respectively about shielded box 133, and two insulation columns 140 are installed in the bottom of shielded box 133;
Grading ring 132 is installed at the top of said shielded box 133;
Preferably, shielded box 133 adopts the single-layer metal structures, and material is galvanized iron, the iron plate of plating zinc on surface just, and thickness is 3 millimeters.Seam crossing adopts solder technology.The shape of shielded box 133 can be the rectangular parallelepiped type, is used to hold data processing and control system wherein, and for easy to use, shielded box 133 also can layering, and shielded box 133 is of a size of the 460*450*750 millimeter.The casing place can perforate, and tapping is installed second connector, 137, the second connectors 137 and had electromagnetic screen, is radiated in the case through tapping thereby reduce the space electromagnetic interference (EMI).In addition, shielded box 133 can adopt various other connected modes, for example overlaps, riveted joint etc.
Shown in Fig. 2 A, Fig. 2 C, said shielding chamber door 3 is installed in the place ahead of shielded box 133, the welding manner of folding formula in shielding chamber door 3 adopts; When the folding formula is welded in adopting; Close the contact area that has increased metal behind the door, reduce the electromagnetic interference (EMI) that finedraw causes, improved shield effectiveness.Shown in Fig. 2 B; The welding manner of folding formula in shielded box door closure 1 adopts has increased the metal contact area with shielded box 133 sides, weld metal reed 2 around the shielded box door closure 1; The space distribution that metal spring leaf 2 is broken up finedraw on the one hand; Make the finedraw skewness, shielded box door closure 1 is closely contacted with shielded box 133, improved shield effectiveness.
For the edge of first shielding box 130, secondary shielding box 143, shielded box 133, the structure of folding adopts metal spring leaf 2 to reduce the finedraw contact closely to increase contact area in can adopting, and strengthens the effect of shielding.In addition, also can shielding chamber door 3 be designed with the form of shield door of band draw-in groove, fill absorbing materials in first shielding box 130, secondary shielding box 143 and the shielded box 133.Should be appreciated that the independent use of above-mentioned various measure all can promote the antijamming capability of this in-site measurement system for radiation, and above-mentioned various measure can be used by independent assortment.
As stated, for the entire field measuring system provides shield assembly, this shield assembly comprises shielding box, metal tube, metallic network of pipelines, connector and the shielded box that is used for the data processing and control system.Said apparatus integrally provides the antijamming capability for electromagnetic radiation for the electrical secondary system disturbance voltage of GIS equipment with harassing and wrecking electric current in-site measurement system
GIS electrical secondary system disturbance voltage may further comprise the steps with the on-site measurement method of harassing and wrecking electric current;
1) voltage probe 114 is gathered the transient state disturbance voltage and the transient state harassing and wrecking electric current of GIS electrical secondary system (being made up of secondary cable 113 and secondary device 112) respectively with current probe 115; Voltage probe 114 with the amplitude transient state disturbance voltage signal of input according to the given intrinsic standoff ratio of voltage probe 114; When adopting the different voltages with different probe; Intrinsic standoff ratio is different, and the intrinsic standoff ratio of the voltage probe that the present invention adopts is 1000: 1; Decay output low amplitude value transient voltage signal; Current probe 115 with the amplitude transient state in loop harassing and wrecking current signal according to the given conversion ratio of current probe 115; When adopting different current probes, conversion is than different, and the conversion ratio of the current probe 115 that the present invention adopts is 1: 1; Output low amplitude value transient current signal inputs to low amplitude value transient voltage signal and low amplitude value transient current signal in the CPU 118;
2) under the control of computing machine 122; CPU 118 acquisition and recording low amplitude value transient voltage signals and low amplitude value transient current signal; Data storage after will writing down then is in storer 119; Actual disturbance voltage equals the low amplitude value transient voltage and multiply by intrinsic standoff ratio, and actual harassing and wrecking electric current equals the low amplitude value transient current and multiply by the conversion ratio;
When 3) data of CPU 118 after judging record satisfied specified conditions, the result that will analyze through optical fiber communication unit 120, optical fiber 121 and remote optical fiber communication unit 141 was sent in the computing machine 122; The result of computing machine 122 receiving and analyzings;
Said specified conditions are meant: GIS electrical secondary system disturbance voltage surpasses the withstand voltage limit value of GIS electrical secondary system; Perhaps GIS electrical secondary system harassing and wrecking electric current surpasses the withstand current limit value of GIS electrical secondary system; Perhaps the GIS electrical secondary system disturbance voltage number of times that surpasses the withstand voltage limit value of GIS electrical secondary system reaches the voltage tolerance number of times of GIS electrical secondary system, and perhaps the GIS electrical secondary system harassing and wrecking electric current withstand current limit value that surpasses the GIS electrical secondary system reaches electric current tolerance number of times.
In one embodiment, the data processing and control system comprises sampling apparatus.Sampling apparatus can convert the signal sampling from voltage probe 114 and current probe 115 into signal form that CPU 118 can be handled.What sampling apparatus was optional is A/D converter.In addition, sampling apparatus can also be a data collecting card.In one embodiment, the data processing and control system also comprises the display device (not shown), is used to show the result of measurement.In one embodiment, the disturbance voltage of 118 pairs of records of CPU is analyzed with the harassing and wrecking current data, and when measurement data satisfies above-mentioned specified conditions, takes action.For example when GIS equipment electrical secondary system disturbance voltage surpasses a certain threshold value with the harassing and wrecking electric current or in measurement result repeatedly, surpass the measurement of specific threshold; Through external optical fiber communication unit 120 and optical fiber 121, CPU 118 can send to long-range computing machine 122 with the result who analyzes.Thus, the staff who is positioned at computing machine 122 will know situation and this residing position of GIS equipment electrical secondary system of this GIS equipment electrical secondary system.In case of necessity, the staff can handle to the scene rapidly, avoids dangerous generation.Although explained in detail not can be taked various suitable forms yet those skilled in the art are to be understood that the communication here, for example utilize wire communication, radio communication of various communication protocols or the like here.In one embodiment, the data processing and control system comprises digital storage oscilloscope.
When the disturbance voltage of GIS electrical secondary system is measured with the harassing and wrecking electric current; Grading ring 132 has improved the Electric Field Distribution around shielded box 133 tops; Avoided the generation of corona; Heat-barrier material 135 avoids shielded box 133 inner electronic equipments to receive the influence of external high temperature bitter cold; Insulating material 139 avoids shielded box 133 inner electronic equipments to receive the influence of casing current potential; Distant place screened room 142 avoids electromagnetic interference (EMI) to remote optical fiber communication unit 141 and computing machine 122 influences; Electric battery 125 output AC electricity after inverter 124 inversions provides AC power for CPU 118, storer 119 and optical fiber communication unit 120; First connector 127 and the 3rd connector 138 are used to reduce the interference of external electromagnetic field to first metallic network of pipelines 128, second metallic network of pipelines 146 and the 3rd metallic network of pipelines 147, and first metallic network of pipelines 128 reduces the influence of electromagnetic interference (EMI) to voltage probe 114 output lines, and second metallic network of pipelines 146 reduces the influence of electromagnetic interference (EMI) to current probe 115 output lines; The 3rd metallic network of pipelines 147 reduces the influence of electromagnetic interference (EMI) to measuring lead wire 116; Secondary shielding box 143 reduces the influence of electromagnetic interference (EMI) to current probe 115, and first shielding box 130 reduces the influence of electromagnetic interference (EMI) to voltage probe 114, and shielded cubicle 131 reduces measuring lead wire 116 electromagnetic interference (EMI) (electromagnetic interference (EMI) that disturbance voltage gives off with the antenna mode) to be influenced the data process control system.
In order further to reduce the influence of radiation, in the data processing and control system, used free-standing power supply.In one embodiment, use the lithium battery group as the data processing and control system power supply to be provided through inverter.In another embodiment, use lead-acid accumulator as the data processing and control system power supply to be provided through inverter.In addition, jumbo free-standing power supply can be provided by independent generator.In the prior art, use the conventional electric cabinet that connects power supply to be provided as the data processing and control system.Yet there is shortcoming in such way, and the space electromagnetic interference (EMI) can be coupled on the power lead that connects between electric cabinet and the data processing and control system, gets into the data processing and control system power port with conductive form, influences the operate as normal of data processing and control system.Use free-standing power supply then can eliminate this Conduction Interference.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.

Claims (7)

1.GIS the measuring system of electrical secondary system disturbance voltage and harassing and wrecking electric current; It is characterized in that; Its structure is following: secondary cable (113) connects the input end of secondary device (112) and current probe (115) respectively; One end of measuring lead wire (116) connects the common node of secondary cable (113) and secondary device (112), and the other end connects the input end of voltage probe (114); The output terminal of the output terminal of voltage probe (114) and current probe (115) all is connected CPU (118); CPU (118) is connected storage (119), optical fiber communication unit (120) and inverter (124) respectively; Optical fiber communication unit (120) is connected storage (119) and inverter (124) respectively; Optical fiber communication unit (120) connects remote optical fiber communication unit (141) through optical fiber (121); Computing machine (122) connects remote optical fiber communication unit (141), and electric battery (125) connects inverter (124); On-the-spot GIS equipment control cabinet (111) ground connection;
First connector (127), metal tube (126) and the 3rd connector (138) are assembled together; On-the-spot GIS equipment control cabinet (111) is assembled together through above-mentioned three and shielded box (133); Second metallic network of pipelines (146) passes first connector (127), metal tube (126) and the 3rd connector (138) successively; The right-hand member of second metallic network of pipelines (146) connects shielded box (133) through connecting line (129); Shielded box (133) is divided into following three layers from top to bottom: shielded cubicle (131), second layer cell (144) and the 3rd layer of cell (145); Separate with insulating material (139) between above-mentioned three layers, between shielded cubicle (131) and the second layer cell (144) perforate is set, second connector (137) is installed in the perforate; Shielded box (133) is processed by single-layer metal, and the insulating material (139) that is positioned between shielded cubicle (131) and the second layer cell (144) is wrapped in single-layer metal; Electric battery (125) and inverter (124) are fixed in the second layer cell (144); CPU (118), storer (119) and optical fiber communication unit (120) are fixed in the 3rd layer of cell (145), and remote optical fiber communication unit (141) and computing machine (122) are installed in the distant place screened room (142); Current probe (115) is contained in the secondary shielding box (143); The left end of second metallic network of pipelines (146) and secondary shielding box (143) are assembled together, and the lead between the output terminal of current probe (115) and the CPU (118) passes second metallic network of pipelines (146) and second connector (137) successively.
2. the in-site measurement system of GIS electrical secondary system disturbance voltage according to claim 1 and harassing and wrecking electric current; It is characterized in that; In the time of in voltage probe (114) is installed in on-the-spot GIS equipment control cabinet (111); Voltage probe (114) is contained in first shielding box (130); First metallic network of pipelines (128) passes first connector (127), metal tube (126) and the 3rd connector (138) successively; The right-hand member of first metallic network of pipelines (128) connects shielded box (133) through connecting line (129); The left end of first metallic network of pipelines (128) and first shielding box (130) are assembled together, and the lead between the output terminal of voltage probe (114) and the CPU (118) passes first metallic network of pipelines (128) and second connector (137), and secondary device (112), voltage probe (114) and current probe (115) all are fixed in the on-the-spot GIS equipment control cabinet (111);
In the time of in voltage probe (114) is installed in shielded cubicle (131); The 3rd metallic network of pipelines (147) passes first connector (127), metal tube (126) and the 3rd connector (138) successively; The left end of the 3rd metallic network of pipelines (147) suspends; Right-hand member connects shielded box (133) through connecting line (129), and measuring lead wire (116) is passed the 3rd metallic network of pipelines (147), and the lead between the output terminal of voltage probe (114) and the CPU (118) passes second connector (137).
3. the in-site measurement system of GIS primary system disturbance voltage according to claim 1 and 2 and harassing and wrecking electric current; It is characterized in that the outside of said first metallic network of pipelines (128), second metallic network of pipelines (146) and the 3rd metallic network of pipelines (147) all is covered with insulation course.
4. the in-site measurement system of GIS primary system disturbance voltage according to claim 1 and harassing and wrecking electric current is characterized in that the outside surface of the single-layer metal of said shielded box (133) is pasted heat-barrier material (135), and inside surface is pasted insulating material (139);
Two sides are installed load-bearing handle (136) respectively about said shielded box (133), and two insulation columns (140) are installed in the bottom of shielded box (133);
Grading ring (132) is installed at the top of said shielded box (133);
Said shielding chamber door (3) is installed in the place ahead of shielded box (133), the welding manner of folding formula in shielding chamber door (3) adopts, and the welding of folding formula in shielded box door closure (1) adopts, shielded box door closure (1) is weld metal reed (2) all around.
5.GIS the on-site measurement method of electrical secondary system disturbance voltage and harassing and wrecking electric current is characterized in that it may further comprise the steps;
1) voltage probe (114) and current probe (115) are gathered the transient state disturbance voltage and the transient state harassing and wrecking electric current of GIS primary system respectively; Voltage probe (114) is exported low amplitude value transient voltage signal with the amplitude transient state disturbance voltage signal of input according to the given intrinsic standoff ratio decay of voltage probe (114); Current probe (115) according to the given conversion specific output low amplitude value transient current signal of current probe (115), inputs to the harassing and wrecking of the amplitude transient state in loop current signal in the CPU (118) with low amplitude value transient voltage signal and low amplitude value transient current signal;
2) under the control of computing machine (122); CPU (118) acquisition and recording low amplitude value transient voltage signal and low amplitude value transient current signal; Data storage after will writing down then is in storer (119); Actual disturbance voltage equals the low amplitude value transient voltage and multiply by intrinsic standoff ratio, and actual harassing and wrecking electric current equals the low amplitude value transient current and multiply by the conversion ratio;
When 3) data of CPU (118) after judging record satisfied specified conditions, the result that will analyze through optical fiber communication unit (120), optical fiber (121) and remote optical fiber communication unit (141) was sent in the computing machine (122); The result of computing machine (122) receiving and analyzing.
6. the on-site measurement method of GIS electrical secondary system disturbance voltage according to claim 5 and harassing and wrecking electric current; It is characterized in that; When the disturbance voltage of GIS electrical secondary system is measured with the harassing and wrecking electric current; Grading ring (132) has improved the Electric Field Distribution around shielded box (133) top; Avoided the generation of corona; Heat-barrier material (135) avoids shielded box (133) inner electronic equipment to receive the influence of external high temperature bitter cold; Insulating material (139) avoids shielded box (133) inner electronic equipment to receive the influence of casing current potential; Distant place screened room (142) avoids electromagnetic interference (EMI) to the influence of remote optical fiber communication unit (141) and computing machine (122), and electric battery (125) output AC electricity after inverter (124) inversion provides AC power for CPU (118), storer (119) and optical fiber communication unit (120), and first connector (127) and the 3rd connector (138) are used to reduce the interference of external electromagnetic field to first metallic network of pipelines (128), second metallic network of pipelines (146) and the 3rd metallic network of pipelines (147); First metallic network of pipelines (128) reduces the influence of electromagnetic interference (EMI) to voltage probe (114) output line; Second metallic network of pipelines (146) reduces the influence of electromagnetic interference (EMI) to current probe (115) output line, and the 3rd metallic network of pipelines (147) reduces the influence of electromagnetic interference (EMI) to measuring lead wire (116), and secondary shielding box (143) reduces the influence of electromagnetic interference (EMI) to current probe (115); First shielding box (130) reduces the influence of electromagnetic interference (EMI) to voltage probe (114), and shielded cubicle (131) reduces measuring lead wire (116) electromagnetic interference (EMI) to be influenced data process control system (117).
7. the on-site measurement method of GIS electrical secondary system disturbance voltage according to claim 5 and harassing and wrecking electric current; It is characterized in that; Said specified conditions are meant: GIS electrical secondary system disturbance voltage surpasses the withstand voltage limit value of GIS electrical secondary system; Perhaps GIS electrical secondary system harassing and wrecking electric current surpasses the withstand current limit value of GIS electrical secondary system; Perhaps the GIS electrical secondary system disturbance voltage number of times that surpasses the withstand voltage limit value of GIS electrical secondary system reaches the voltage tolerance number of times of GIS electrical secondary system, and perhaps the GIS electrical secondary system harassing and wrecking electric current withstand current limit value that surpasses the GIS electrical secondary system reaches electric current tolerance number of times.
CN2012100575438A 2012-03-06 2012-03-06 Measurement system and measurement method for disturbance voltage and disturbance current of GIS (gas insulated switchgear) secondary system Pending CN102608401A (en)

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CN104917443A (en) * 2015-06-04 2015-09-16 中国电力科学研究院 Solar autonomous power supply system
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CN107607769A (en) * 2017-08-22 2018-01-19 全球能源互联网研究院 A kind of transient voltage measurement apparatus
CN107656122A (en) * 2017-08-22 2018-02-02 全球能源互联网研究院 A kind of transient current measurement device
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CN109991468A (en) * 2019-03-21 2019-07-09 中国电力科学研究院有限公司 A kind of method and device for testing ultra-high voltage transformer station electrical secondary system disturbance voltage
CN112162162A (en) * 2020-09-24 2021-01-01 华北电力大学 Electromagnetic disturbance measuring device and system

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Application publication date: 20120725