CN103743977A - High-voltage heavy-current combined temperature rise verification platform for equipotential temperature measuring device - Google Patents
High-voltage heavy-current combined temperature rise verification platform for equipotential temperature measuring device Download PDFInfo
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Abstract
一种等电位测温装置的高电压大电流联合温升验证平台，升压调压器和升压变压器放置在地面上且外壳分别接地，升压变压器的高压绕组设置有抽头；绝缘平台的绝缘支柱支承金属台面；升流调压器和升流器放置在金属台面上且外壳分别连接到金属台面；电源连接到升压调压器的输入端，升压调压器的输出端连接到升压变压器的输入端；升压变压器的高压输出端连接到升流调压器的输入端，抽头连接到金属台面；升流调压器的输出端连接到升流器的输入端，升流器的输出端连接到高压电器设备。本发明使得对等电位测温装置的评测与验证采用高电压大电流的强电场环境下进行，更接近于实际运行工况；升流部分采用绝缘平台支撑法使成本和体积重量大大降低。
A high-voltage and high-current combined temperature rise verification platform for an equipotential temperature measuring device. The step-up regulator and step-up transformer are placed on the ground and the casings are respectively grounded. The high-voltage winding of the step-up transformer is provided with taps; the insulation of the insulation platform The pillars support the metal table; the step-up voltage regulator and the current booster are placed on the metal table and the shells are respectively connected to the metal table; the power supply is connected to the input end of the boost voltage regulator, and the output end of the step-up voltage regulator is connected to the booster The input end of the step-up transformer; the high-voltage output end of the step-up transformer is connected to the input end of the step-up voltage regulator, and the tap is connected to the metal table; the output end of the step-up voltage regulator is connected to the input end of the up-flow device The output terminal is connected to high-voltage electrical equipment. The invention enables the evaluation and verification of the equipotential temperature measuring device to be carried out in a strong electric field environment with high voltage and high current, which is closer to the actual operating condition; the rising current part adopts the insulating platform support method to greatly reduce the cost and volume weight.
Description
Technical field
The present invention relates to power system device test platform, is specifically a kind of high-voltage large current associating temperature rise verification platform of equipotential temperature measuring equipment.
Background technology
Electric system high-voltage electrical equipment, particularly high-tension switch cabinet, in Substation Station using electricity system and distribution network system, play a part to ensure substation safety operation and people's normal life.Along with society, economic development, power load is growing, and electric system scale constantly expands, increasing high-tension switch cabinet put into operation and long-term work in high temperature high load capacity environment.Due to directly related with power supply, economic loss and social loss that high voltage switch cabinet fault causes power outage to bring are very huge, therefore, improve high-tension switch cabinet safety operation level, are importances that ensures power grid security.In recent years, metal armouring high-tension switch cabinet over-heat inside fault occurs repeatedly.Although up to now, the multiple temp measuring method based on different principle has been developed in each field, and its thermometric effect, temperature-measuring range, applied environment and application conditions are different.Because metal armouring causes cabinet monitoring internal temperature difficulty, the equipotential temperature measuring equipment of many Wireless Data Transmission modes that therefore arisen, can carry out overheated monitoring to the current loop of electric system mesohigh electric equipment.With respect to other High-Voltage Electrical Appliances and power transmission and transforming equipment, switch cubicle electric pressure is lower, but its inner space is narrow and small, part is various, complex structure, insulation distance are limited, therefore than other high-voltage electrical equipment, more easily occurs insulation fault.And the higher temperature of inside switch cabinet and complicated Electric Field Distribution are also difficult to estimate on the impact of equipotential temperature measuring equipment self-operating.For this reason, to being arranged on the temperature measurement on-line device of switch cabinet body inside, be extremely necessary that the performance after it is installed is evaluated and tested, conscientiously ensure the validity of high-tension switch cabinet temperature measurement on-line and even the safety operation level of switch cubicle.But, current standard or the standard that also lacks equipotential temperature measuring equipment product.In order to ensure the normal operation that does not affect high-tension switch cabinet after equipotential temperature measuring equipment assembles, be necessary this series products to carry out examination or the checking of temperature monitoring performance under the electric field situation of high-voltage great-current, this is also unique feasible means under existence conditions.And general strong current generator adopts low pressure up-flow mode, be subject to the restriction of insulating material and manufacturing process, there is no at present can boost simultaneously, the test platform of up-flow, there is no corresponding validation test method yet.
Summary of the invention
The object of this invention is to provide a kind of high-voltage large current associating temperature rise verification platform of equipotential temperature measuring equipment, for equipotential temperature measuring equipment is carried out to Performance Assessment or checking.
The technical scheme that realizes the object of the invention is as follows: a kind of high-voltage large current associating temperature rise verification platform of equipotential temperature measuring equipment, boosting, pressure regulator and step-up transformer are placed on the ground and shell ground connection respectively, and the high pressure winding of step-up transformer is provided with tap; Insulated platform comprises metal table top and insulation column, insulation column supporting metal table top; Up-flow pressure regulator and current lifting device are placed on metal table top and shell is connected respectively to metal table top; Power supply is connected to the input end of the pressure regulator that boosts, and the output terminal of the pressure regulator that boosts is connected to the input end of step-up transformer; The high-voltage output end of step-up transformer is connected to the input end of up-flow pressure regulator, and tap is connected to metal table top; The output terminal of up-flow pressure regulator is connected to the input end of current lifting device, and the output terminal of current lifting device is connected to the high-voltage electrical equipment that equipotential temperature measuring equipment is monitored; The pressure regulator that boosts comprises boost motor and the circuit for controlling motor that boosts, and the motor that boosts is connected to the circuit for controlling motor that boosts, and the circuit for controlling motor that boosts is connected to control desk; Up-flow pressure regulator comprises up-flow motor and up-flow circuit for controlling motor, and up-flow motor is connected to up-flow circuit for controlling motor, and up-flow circuit for controlling motor is connected to control desk by isolator.
Wherein, the surrounding of the metal table top of described insulated platform is provided with grading ring; The model of described step-up transformer is LTSB-25/375-(C) 0.25; Current lifting device model is TYL-15.
Further, described isolator comprises wireless launcher and wireless receiver; Control desk is connected to wireless launcher, and wireless launcher is connected to wireless receiver by wireless channel, and wireless receiver is connected to up-flow circuit for controlling motor.
Further, described isolator comprises optical transmitting set and optical receiver; Control desk is connected to optical transmitting set, and optical transmitting set is connected to optical receiver by optical fiber, and optical receiver is connected to up-flow circuit for controlling motor.
Further, described up-flow circuit for controlling motor by up-flow circuit with fall current circuit in parallel after series stabilized current circuit form; Described up-flow circuit by the normally opened contact of up-flow electromagnetic switch SL and the second normally opened contact KM1-2 parallel connection of the first relay K M1 after, more in series with the coil of normally closed contact, the normally closed contact of the second relay K M2, high limit switch XW1 and the first relay K M1 that falls stream electromagnetic switch JL; Current circuit falls by falling after the normally opened contact of stream electromagnetic switch JL and the second normally opened contact KM2-2 parallel connection of the second relay K M2, more in series with the coil of the normally closed contact of up-flow electromagnetic switch SL, the normally closed contact of the first relay K M1, low limit switch XW2 and the second relay K M2; Current stabilization circuit is in series by fuse R3, the normally closed contact of current stabilization electromagnetic switch WL and the normally closed contact of the first electrothermal relay FR1; Described up-flow electromagnetic switch SL, the control end that falls stream electromagnetic switch JL and current stabilization electromagnetic switch WL are connected respectively to wireless receiver; The first normally opened contact KM1-1 of the first relay K M1 is connected in the forward loop of up-flow motor, and the first normally opened contact KM2-1 of the second relay K M2 is connected in the reversion loop of up-flow motor.
Preferably, between the input end of power supply and the pressure regulator that boosts, be also provided with power supply input switch K1, boost and be also provided with High voltage output K switch 2 between the output terminal of pressure regulator and the input end of step-up transformer, the control end of power supply input switch K1 and High voltage output K switch 2 is connected respectively to control desk; Between the input end of the high-voltage output end of step-up transformer and up-flow pressure regulator, be also provided with up-flow input switch K3, up-flow input switch K3 consists of the first normally opened contact J3-1 of the 3rd relay J 3; After the second normally opened contact J3-2 of up-flow input switch control circuit by the normally opened contact of the electromagnetic switch QD that closes a floodgate the 3rd relay J 3 in parallel, then formation after connect with the coil of the normally closed contact of separating brake electromagnetic switch ST, the 3rd relay J 3 and fuse R1; The control end of combined floodgate electromagnetic switch QD and separating brake electromagnetic switch ST is connected respectively to wireless receiver.
The invention has the beneficial effects as follows: to carrying out under the strong electric field environment of the evaluation and test of equipotential temperature measuring equipment and checking employing high-voltage large current, closer to actual operating mode, avoided only by high voltage or the limitation of large electric current evaluation and test and the shortcoming of the operating mode that loses contact with reality.Up-flow part is not carried out reinforced insulation material and PROCESS FOR TREATMENT, and adopt insulated platform to prop up staying, cost and volume weight is reduced greatly.
Accompanying drawing explanation
Fig. 1 is the mounting structure figure of platform.
Fig. 2 is electrical schematic diagram.
Fig. 3 is up-flow circuit for controlling motor and up-flow input switch control circuit schematic diagram.
Fig. 4 is the vertical view of metal table top.
Fig. 5 is the A-A cut-open view of metal table top.
Wherein, 1-insulated platform, 2-insulation column, the high-voltage electrical equipment that 3-equipotential temperature measuring equipment is monitored, 4-control desk, 5-wireless launcher, 6-wireless receiver, 7-up-flow circuit for controlling motor and up-flow input switch control circuit, 8-metal table top, 9-grading ring.
Embodiment
Mentality of designing of the present invention is:
1) in the number of turn of the high-end extraction some of high pressure winding of step-up transformer, make this part when all winding output voltage reaches the specified operation phase voltage that device for detecting temperature equipment has been installed, provide 250V voltage and deliver to current lifting device through pressure regulator, by voltage adjustment, make current lifting device output current to the current value needing, realize the verification experimental verification condition of high-voltage large current.
2) because current lifting device is low-voltage up-flow mode, its integral insulation level cannot be born action of high voltage, so adopt insulated platform to support strong current generator part, up-flow pressure regulation part adopts wireless or Optical Fiber Transmission control signal, safe isolated high voltage, makes to control and operating personnel obtain safety guarantee.
3) at voltage, electric current, reach checking while requiring, the device working condition of test equipotential temperature measuring equipment, electric field distortion degree temperature measuring equipment being caused by ultraviolet photon instrument or electric field intensity test probe is tested, at electric field distortion, do not reach clearance electric discharge, while puncturing degree, contrast temperature measuring equipment data and temperature rise test device temperature measured value, obtain relative error for test and appraisal.
4) to the electric equipment that needs test and appraisal checking is installed--as high-tension switch cabinet, adopting this platform to adjust voltage and current makes it reach the expection requirement of verification condition, by all kinds of overheating fault situations such as manual simulation's switch cubicle accidental conditions and current loop " contact slap ", " disconnector close a floodgate not in place ", the analysis management software on the Monitoring Performance of the In-Line Temperature Measure System to each producer and backstage is evaluated and tested and checking again, finally obtains the comprehensive evaluation result of this In-Line Temperature Measure System.
Concrete embodiment is as follows:
As shown in Figure 1 and Figure 2, boost pressure regulator T1 and step-up transformer B1 place on the ground and shell ground connection respectively, and the high pressure winding of step-up transformer B1 is provided with tap; Insulated platform 1 comprises metal table top 8 and insulation column 2, and insulation column 2 supports metal table top 8; Up-flow pressure regulator T2 and current lifting device B2 are placed on metal table top 8 and shell is connected respectively to metal table top 8; Power supply is connected to the input end of the pressure regulator T1 that boosts, and the output terminal of the pressure regulator T1 that boosts is connected to the input end of step-up transformer B1; The high-voltage output end of step-up transformer B2 is connected to the input end of up-flow pressure regulator T2, and tap is connected to metal table top 8; The output terminal of up-flow pressure regulator T2 is connected to the input end of current lifting device B2, and the output terminal of current lifting device B2 is connected to the high-voltage electrical equipment 3 that equipotential temperature measuring equipment is monitored; The pressure regulator T1 that boosts comprises boost motor M 1 and the circuit for controlling motor that boosts, and the motor M of boosting 2 is connected to the circuit for controlling motor that boosts, and the circuit for controlling motor that boosts is connected to control desk 4; Up-flow pressure regulator T2 comprises up-flow motor M 2 and up-flow circuit for controlling motor, and up-flow motor M 2 is connected to up-flow circuit for controlling motor, and up-flow circuit for controlling motor is connected to control desk 4 by isolator.
In technique scheme, because up-flow part entirety is in noble potential, personnel cannot local operation, must transmit operation, control command by isolator, to complete the adjustment of demonstration test electric current.Isolator can adopt wireless transmission method, also can adopt optical fiber to connect.Adopt the isolator of wireless connections to comprise wireless launcher 5 and wireless receiver 6; Control desk 4 is connected to wireless launcher 5, and wireless launcher 5 is connected to wireless receiver 6 by wireless channel, and wireless receiver 6 is connected to up-flow circuit for controlling motor.The isolator that adopts optical fiber to connect comprises optical transmitting set and optical receiver; Control desk is connected to optical transmitting set, and optical transmitting set is connected to optical receiver by optical fiber, and optical receiver is connected to up-flow circuit for controlling motor.Wireless launcher and wireless receiver, and optical transmitting set and optical receiver, have very ripe product, as long as can transmit the product of operation, control command, all can select.Control desk, provides operation, control, measurement, defencive function when carrying out verification operation, also has ripe product available.
Fig. 3 shows a kind of principle of up-flow circuit for controlling motor.Up-flow circuit for controlling motor by up-flow circuit with fall current circuit in parallel after series stabilized current circuit form; Up-flow circuit by the normally opened contact of up-flow electromagnetic switch SL and the second normally opened contact KM1-2 parallel connection of the first relay K M1 after, more in series with the coil of normally closed contact, the normally closed contact of the second relay K M2, high limit switch XW1 and the first relay K M1 that falls stream electromagnetic switch JL; Current circuit falls by falling after the normally opened contact of stream electromagnetic switch JL and the second normally opened contact KM2-2 parallel connection of the second relay K M2, more in series with the coil of the normally closed contact of up-flow electromagnetic switch SL, the normally closed contact of the first relay K M1, low limit switch XW2 and the second relay K M2; Current stabilization circuit is in series by fuse R3, the normally closed contact of current stabilization electromagnetic switch WL and the normally closed contact of the first electrothermal relay FR1; Described up-flow electromagnetic switch SL, the control end that falls stream electromagnetic switch JL and current stabilization electromagnetic switch WL are connected respectively to wireless receiver; The first normally opened contact KM1-1 of the first relay K M1 is connected in the forward loop of up-flow motor, and the first normally opened contact KM2-1 of the second relay K M2 is connected in the reversion loop of up-flow motor.
The circuit for controlling motor that boosts adopts and the duplicate setting of up-flow circuit for controlling motor.The circuit for controlling motor that boosts does not need to be directly connected to control desk by isolator, therefore can carry out some and simplify to reduce costs.For example, the various electromagnetic switch in above-mentioned up-flow circuit for controlling motor are replaced to non-electromagnetic switch.
Because verification platform needs progressively to complete and boost and up-flow in operation, be therefore also provided with switch and control the output of high-voltage large current and protect.As Fig. 3, between the input end of power supply and the pressure regulator that boosts, be also provided with power supply input switch K1, boost and be also provided with High voltage output K switch 2 between the output terminal of pressure regulator and the input end of step-up transformer, the control end of power supply input switch K1 and High voltage output K switch 2 is connected respectively to control desk; Between the input end of the high-voltage output end of step-up transformer and up-flow pressure regulator, be also provided with up-flow input switch K3, up-flow input switch K3 consists of the first normally opened contact J3-1 of the 3rd relay J 3; After the second normally opened contact J3-2 of up-flow input switch control circuit by the normally opened contact of the electromagnetic switch QD that closes a floodgate the 3rd relay J 3 in parallel, more in series with coil and the fuse R1 of the normally closed contact of separating brake electromagnetic switch ST, the 3rd relay J 3; The control end of combined floodgate electromagnetic switch QD and separating brake electromagnetic switch ST is connected respectively to wireless receiver.
Insulated platform consists of metal table top and insulation column, as Fig. 1.Insulation column is according to current lifting device and up-flow pressure regulator volume and weight (having plenty of integrated) decision, and the weight of equipment that the present invention adopts is between 160kg to 200kg, and the about 2000mm × 1200mm of metal platform area, by 8 eradication edge pillar supportings.Insulation column and air distance make metal table top and the earth reach trial voltage insulating requirements, can bear demonstration test voltage.Guaranteeing that the air distance between insulated platform metal table top and ground, high-voltage electrical equipment etc. (is not less than 150mm for 12kV grade high-voltage electrical equipment, 40.5 kV grade tested devices are not less than 350mm) require after, make to be placed in up-flow part on insulated platform entirety insulation against ground resistance R
preach the high-voltage electrical equipment dielectric level that measured product is installed, but up-flow part is still considered by low-voltage dielectric level, only control operation part is connected by wireless mode or optical fiber, to reach high and low potential isolation, ensured the safety of operating personnel and relevant device.In addition, as shown in Figure 4, Figure 5, also be provided with grading ring, grading ring consists of metal semi-circular tube, around being welded on metal table top surrounding, to improve the local distortion at these highfield positions, strengthen platform insulation and reduce power loss, reduce power consumption and make the volume and weight of whole platform be convenient to move and install.
Each several part principle of the present invention is as follows: the winding that boosts of the part of boosting provide corresponding by install equipotential temperature measuring equipment by thermometric electric equipment operation phase voltage V3, voltage is applied on insulated platform metal table top.Take out press winding for the large electric current current lifting device on insulated platform and its are controlled, protection, etc. power supply V4 is provided.The control desk of configuration can provide operation, control, measurement, the defencive function of platform simultaneously, and reaches demonstration test voltage request by the adjustment pressure regulator T1 that boosts.
Up-flow pressure regulator and current lifting device are placed on insulated platform, because metal table top is in electric equipment operation phase voltage V3, make its large current return by thermometric electric equipment reach working voltage, then by the output current of strong current generator, make to be reached its rated current and demonstration test current requirements by the current return of thermometric electric equipment.Because high voltage is provided by the part of boosting, so only several volts of outlet voltages when strong current generator is exported large electric current (outlet voltage during 3000A is 5V left and right), but the high-voltage state of the voltage-to-ground that is applied to the high-voltage electrical equipment current return that measured product is installed while having reached equipment actual motion.Because up-flow part entirety is in noble potential, personnel cannot local operation, its operation, controls and completes the adjustment of demonstration test electric current by wireless (or adopting other isolated controlling measures) mode.Concrete grammar is that the up-flow input switch K3 of up-flow part is consisted of the normally opened contact of relay J 3, distant place reclosing command converts wireless pulses to electric pulse by wireless receiver R/L-CS makes electromagnetic switch QD action closed, the charged general supply that completes of J3 closing coil is closed a floodgate, and realizes combined floodgate self-sustaining by J3 auxiliary contact.When completing cranking test or need emergency opening up-flow part general supply, in like manner, distant place separating brake instruction converts wireless pulses to electric pulse by wireless receiver R/L-CS separates electromagnetic switch ST action, and J3 closing coil dead electricity completes general supply separating brake.The ascending, descending of electric current is by controlling pressure regulator T2, the ascending, descending of current lifting device input voltage to be realized, and the ascending, descending of pressure regulator T2 output voltage drives turbine ratch to carry out voltage adjustment by the forward and backward of motor.When up-flow electromagnetic switch SL receives closing pulse action closure, motor forward improves constantly pressure regulator T2 output voltage, current lifting device output current constantly increases, while reaching required electric current, sending current stabilization closing pulse separates electromagnetic switch WL action, be that motor does not rotate, pressure regulator T2 keeps output voltage constant, makes current lifting device keep constant High-current output to carry out demonstration test.In the time will reducing current lifting device output current, only need make electromagnetic switch JL receive closing pulse action closed, motor reversal constantly reduces pressure regulator T2 output voltage, and current lifting device output current also constantly reduces.If end electric current, decline, only need to send current stabilization closing pulse electromagnetic switch WL action is separated, can keep current electric current constant.When pressure regulation turbine ratch touches limit switch XW2, motor stops operating, and current lifting device stops electric current output.Up-flow part possesses motor overload protection FR, and the high limit switch WX1 of pressure regulation turbine ratch and low limit switch XW2 protection pressure regulator T2 avoid physical damage, and interlocking auxiliary contact KM1 and KM2 avoid carrying out the maloperation of forward and backward simultaneously.
During use, the part of boosting is applied to winding of step-up transformer B1 by 250V power input voltage by the pressure regulator T1 that boosts, Secondary Winding adopts tap mode to press winding to be comprised of the winding that boosts with taking out, when the winding that boosts rises to by low pressure the high-voltage electrical equipment rating operating voltage V3 that measured product is installed, take out and press winding output voltage V 4 to up-flow part.
Up-flow part will be taken out and be pressed winding output voltage V 4(250V) be used as power input voltage and be applied to winding of current lifting device B2 by up-flow pressure regulator T2, Secondary Winding is exported large electric current to the high-voltage electrical equipment rated current of measured product or the rated current of 1.1 times are installed, and realizes the temperature rise test under operation high voltage operating mode.
In a word, the present invention is provided (little electric current) high voltage parameter of demonstration test by the part of boosting, (low-voltage) large current parameters of demonstration test is provided by up-flow part in high voltage potential, it puts on the high-voltage electrical equipment that measured product (equipotential temperature measuring equipment) is installed jointly, realizes high-voltage large current associating temperature rise demonstration test and test.
To be provided with in the 12kV high-tension switch cabinet of equipotential temperature measuring equipment as example:
The primary current loop that isolating switch DL, disconnector GN and the copper bus-bar closing a floodgate in the switch cubicle (KYN-12) that equipotential temperature measuring equipment is housed etc. connects and composes is during in closure state, and the interior primary current of cabinet loop is connected to form closed-loop path into and out of line end and current lifting device B2 Secondary Winding.In cabinet primary current loop by insulating part and air apart from the insulation resistance R that forms over the ground (comprising switch cubicle metal inner surface)
x, this insulation resistance R
xto bear the working voltage V3 being provided by step-up transformer B1, make temperature measuring equipment in high voltage electric field and obtain security and monitoring reliability checking.
In the inside that equipotential temperature measuring equipment switch cubicle is housed, overheating fault is artificially set, under high voltage electric field, pass through current lifting device B2 regulation output electric current, observe, measure, contrast all kinds of artificial current loop overheating fault situations, the analysis management software on the Monitoring Performance to In-Line Temperature Measure System and backstage is evaluated and tested and checking, finally obtains the comprehensive evaluation result of this In-Line Temperature Measure System.
Operation steps is: need carry out all states such as its loop of high-voltage electrical equipment (in switch cubicle) of joint verification test and device and all meet after live testing verification condition having checked, power turn-on input switch K1, High voltage output K switch 2 successively, then supply voltage V1 adjusts voltage V2 by the pressure regulation motor M 1 of the pressure regulator T1 that boosts and makes step-up transformer B1 output voltage to high-voltage electrical equipment (as switch cubicle) working voltage V3, after it is stable, prepare up-flow.By having taked the control system of potential isolation measure, up-flow input switch K3 closes, make to take out and press winding voltage V4 to adjust voltage V5 by the pressure regulation motor M 2 of up-flow pressure regulator T2 to make the current loop of current lifting device B2 output current to high-voltage electrical equipment (in switch cubicle), when reaching the test current of expection, observation has or not abnormal occurrence, then after its temperature is basicly stable in accordance with regulations, carry out the test and appraisal of temperature survey, functional verification and correlation parameter and analysis and management system.As the need checkings ability to overheating defect monitoring, first platform of the present invention is exited and is carried out after corresponding safety practice, carry out defect setting, then according to above-mentionedly boosting, up-flow step and requirement complete relevant demonstration test.
The technical indicator of the high-voltage large current associating temperature rise verification platform of equipotential temperature measuring equipment:
Major equipment model:
Variant number boosts: LTSB-25/375-(C) 0.25;
Current lifting device model: TYL-15;
Support insulator model: ZS-40.5/6;
The key technical indexes:
Supply voltage: 250V;
Change ceiling voltage: 25kV boosts;
The change no-load voltage ratio of boosting: 100;
Tap winding rated voltage: 250V;
Tap winding maximum current: 150A;
Current lifting device maximum output current: 3000A(5V);
Support insulator is withstand voltage in short-term: 100 kV.
Claims (7)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004956A (en) * | 2015-07-30 | 2015-10-28 | 天地（常州）自动化股份有限公司 | Collector control and temperature rise test device |
| CN106645902A (en) * | 2016-12-13 | 2017-05-10 | 中国电力科学研究院 | System capable of simultaneously generating DC high voltage and DC high current and method |
| CN108445329A (en) * | 2018-06-11 | 2018-08-24 | 成都理工大学 | A kind of temperature-rise test device of extra-high voltage large capacity combined electrical apparatus |
| CN112490901A (en) * | 2020-11-27 | 2021-03-12 | 江西宁鸿电子技术有限公司 | Large current generator |
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| CN105004956A (en) * | 2015-07-30 | 2015-10-28 | 天地（常州）自动化股份有限公司 | Collector control and temperature rise test device |
| CN105004956B (en) * | 2015-07-30 | 2018-03-30 | 天地（常州）自动化股份有限公司 | A kind of current-collector control and temperature rise test equipment |
| CN106645902A (en) * | 2016-12-13 | 2017-05-10 | 中国电力科学研究院 | System capable of simultaneously generating DC high voltage and DC high current and method |
| CN106645902B (en) * | 2016-12-13 | 2021-04-23 | 中国电力科学研究院 | A system and method capable of generating high DC voltage and high DC current simultaneously |
| CN108445329A (en) * | 2018-06-11 | 2018-08-24 | 成都理工大学 | A kind of temperature-rise test device of extra-high voltage large capacity combined electrical apparatus |
| CN112490901A (en) * | 2020-11-27 | 2021-03-12 | 江西宁鸿电子技术有限公司 | Large current generator |
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