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37results about How to "High equivalence" patented technology
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Power loop test method for steady-state operation test of flexible direct current power transmission MMC (Modular Multilevel Converter) valve
ActiveCN102323545AReduce capacity requirementsReduce active lossAc-dc conversionCircuit interrupters testingVoltage amplitudePhase difference
The invention relates to a power loop test method for a steady-state operation test of a flexible direct current power transmission MMC (Modular Multilevel Converter) valve. The method comprises the following steps of: setting voltage amplitudes V1 and V2 of valve banks 1 and 2 and phase difference delta of the two voltage amplitudes and setting output voltage of an energy replenishing power source E2; closing an isolating switch K1 and charging a sub-module capacitor by a charging power source E1; cutting off K1 to exit E1 to finish pre-charging after the voltage of the sub-module capacitor reaches a set value; closing an isolating switch K2 and switching to the energy replenishing power source E2; meanwhile, sending out trigger pulses of IGBTs (Insulated Gate Bipolar Translator) of all sub-modules of the two valve banks according to a modulation strategy and getting a circuit in a steady-state running state; establishing voltage stress required by test at the two ends of the valve banks 1 and 2, performing energy exchange on sub-module capacitors and load reactors of two valve components and generating current stress required by the test in a loop; and cutting off K2 and exiting E2, latching the trigger pulses of the IGBTs in the sub-modules and finishing the test. The test method is simple and flexible; and a test parameter adjustment method is simple and convenient.
Owner:CHINA ELECTRIC POWER RES INST +1
Back-to-back test method of VSC-HVDC MMC valve stable state operation test
ActiveCN102323546AReduce capacity requirementsReduce frequencyAc-dc conversionCircuit interrupters testingCapacitanceStable state
The invention provides a back-to-back test method of a VSC-HVDC MMC valve stable state operation test. Devices used in the method comprise a rectification side, an inversion side and a supporting capacitor. The rectification side and the inversion side are in parallel connection at two sides of the supporting capacitor respectively to form a back-to-back circuit. Through controlling submodules of valve modules of the rectification side and the inversion side, stable state operation voltage, current and heat intensity equal to actual condition are obtained. According to the invention, the rectification side and the inversion side share a power supply, active power emitted by the power supply returns to the power supply, a power supply capacity requirement is reduced at the most; the valve modules of the invention are selected from an actual engineering, a test circuit operation principle and a control strategy have high similarity with MMC in the actual engineering, and necessary effective valve operational reliability investigation means and control strategy verification environment are provided for the MMC before investing in practical application.
Owner:CHINA ELECTRIC POWER RES INST +1
Testing device of high voltage direct current circuit breaker full bridge module and testing method thereof
The invention relates to a test device and a test method for a full-bridge module of a high-voltage DC circuit breaker. The test device includes a charging circuit, a capacitor C1, a reactor L, a full-bridge module unit, an energy absorber Rz, and a thyristor T; wherein the charging circuit includes DC charging power supply, current limiting resistor R, isolation switch K, discharge resistor R off , Release switch K2. The test method charges the low-voltage large capacitor through the DC power supply. After the completion, the thyristor triggers the test circuit. The test current is injected into the full-bridge module after being adjusted by the reactance. When the expected breaking current or the maximum breaking time is reached, the breaking is completed. Energy absorbers absorb and limit overvoltages. The topology of the test circuit is simple, the control is simple, the test capacity is low, the test current is large, the breaking current amplitude and di / dt are flexible and adjustable, the test equivalent is high, and it has the ability to comprehensively test the design rationality and operational reliability of the full-bridge module unit ability.
Owner:STATE GRID CORP OF CHINA +2
Testing circuit and method for detecting breaking performance of DC circuit breaker
Owner:XIAN HIGH VOLTAGE APP RES INST CO LTD
Operation synthesis tester for ultrahigh voltage direct current converter valve
InactiveCN103744017AEasy to adjustTo achieve the purpose of voltage reversalCircuit interrupters testingHigh voltage igbtVoltage loop
The invention relates to an operation synthesis tester for an ultrahigh voltage direct current converter valve, which comprises a 12-pulse wave converter loop, a high voltage loop and a large current loop which are connected two by two, wherein the ultrahigh voltage loop provides a reverse restore voltage and a positive voltage for a valve to be tested; the large current loop provides a large current for flowing the valve to be tested; the 12-pulse wave converter loop provides high voltage, fault overcurrent and direct current intermittent current needed by the valve to be tested. Compared with the prior art, the operation synthesis tester for the ultrahigh voltage direct current converter valve has the advantages of good equivalence, wide applicable range, good economy, high test precision and the like.
Owner:SHANGHAI JIAO TONG UNIV
Chinese speech automatic audiometric method based on Chinese speech audiometric dynamic word list
A Chinese speech automatic audiometric method based on a Chinese speech audiometric dynamic word list belongs to the technical field of speech audiometry and is characterized in that a speech audiometric word list composed of a certain audiometric word list with designated length and an implicit word list with uncertain length. The certain audiometric word list refers to a speech audiometric word list formed by conducting listening classification and definition calculation on initials and finals from the angle of acoustic characteristics of a voice file and compiling with the calculation as the core. The implicit word list is expansion of the certain audiometric word list and is a set of compensation test items selected by a subject who has faults in listening of the certain audiometric word list. Initials and finals of the compensation test items and the fault listening items in the certain audiometric word list belong to one initial and final class. Therefore, a plurality of equivalent speech audiometric dynamic word lists are formed, speech audiometric software used for conducting compensation audiometry on the fault listening items in the certain audiometric word list through the implicit word list items is formed, the audiometric process is automatically finished through a software system in one Chinese speech audiometric system. Compared with a traditional audiometric system, the method has the advantages of being high in audiometry efficiency, audiometry credibility and equivalence property.
Owner:TSINGHUA UNIV
Service test method of minimum trigger angle of DC converter valve with asymmetric voltage
ActiveCN101776733AHigh test equivalenceFlexible adjustmentCircuit interrupters testingIndividual semiconductor device testingElectric power systemWave shape
The invention provides a service test method of minimum trigger angle of DC converter valve with asymmetric voltage, belonging to the field of power electronics and electric power system simulated test. The invention causes test object voltage to rise to the needed value by triggering an auxiliary valve in proper time within the period of voltage source charging, test object voltage wave shape isapproximate to the practical working condition; DC heavy current is provided by six pulsation rectifier bridges, and the wave shape is almost the same with the practical working condition.
Owner:CHINA ELECTRIC POWER RES INST +1
DC converter valve minimum turn-off angle running test method
ActiveCN101776719AFlexible adjustmentEquivalent turn-off voltageCircuit interrupters testingCapacitanceElectric power system
The invention provides a DC converter valve minimum turn-off angle running test method, belonging to the fields of power electronics and electrical power system simulated experiment. The method realizes the needed turn-off time by flexibly adjusting the charging moment of a capacitance C in a high-voltage low current source, and simultaneously acquires the needed minimum turn-off voltage by being matched with the partial voltage of an auxiliary valve; and the method also can meet the sample taking energy by increasing primary oscillating process, and can fully test and verify the turn-off reliability of the valve. DC heavy current is provided by a six-pulse rectifier bridge, and the wave form is basically the same as that of the actual working condition.
Owner:CHINA ELECTRIC POWER RES INST +1
Water and gas pressure adjustment-based phytotron multiple icing type forming method
ActiveCN104807493AReduce power consumptionImprove efficiencyMeasurement devicesIce waterSpray nozzle
The invention relates to a water and gas pressure adjustment-based phytotron multiple icing type forming method. The water and gas pressure adjustment-based phytotron multiple icing type forming method is implemented through the following test platform, which is composed of an atomizing spray system inside a phytotron and an icing water system and an icing gas system outside the phytotron. The atomizing spray system comprises an icing water atomizing spray nozzle set composed of a plurality of atomizing spray nozzles; the icing water system is connected with the water inlet of every atomizing spray nozzle; the icing gas system is connected with the gas inlet of every atomizing spray nozzle; the icing test is started after the phytotron is cooled to a target temperature. By adjusting the pressure of icing water and icing gas, the number and the diameter of water / fog drops sprayed out of the icing spray nozzles, namely, multiple icing types such as glaze, rime, mixed rime and wet snow can be formed on the surface of a test object, and meanwhile, continuity of the icing types can be achieve in one test, so that equivalence between the icing test result of the phytotron and the actual situation in the natural environment can be enhanced.
Owner:STATE GRID CORP OF CHINA +2
Circuit, method and device for over-current turn-off test of converter valve
PendingCN111398772AHigh equivalenceCircuit interrupters testingIndividual semiconductor device testingOvercurrentHemt circuits
The invention discloses a circuit, a method and a device for an over-current turn-off test of a converter valve. The test circuit comprises a direct-current power supply, an isolating switch, a filterreactor and at least two phase units. Each phase unit comprises at least two converter valves, a bridge arm reactor and a load reactor, and the converter valves are connected through the bridge arm reactor; alternating current sides of the at least two phase units are connected through the load reactor; direct current sides of the at least two phase units are connected; and the direct-current power supply is connected with each direct-current side of each phase unit through the isolating switch and the filter reactor. A converter valve maximum continuous operation test and a transistor overcurrent turn-off test can be performed in one circuit at the same time, an equipment utilization rate is improved, and investment cost is reduced; and meanwhile, the test circuit is stable and reliablein operation, and meets technical requirements of the converter valve over-current turn-off test.
Owner:XJ ELECTRIC +3
DC converter valve minimum triggering angle running test method
ActiveCN101776732AHigh test equivalenceEasy to adjustCircuit interrupters testingIndividual semiconductor device testingElectric power systemWave form
The invention provides a DC converter valve minimum triggering angle running test method, belonging to the fields of power electronics and electrical power system simulated experiment. The method realizes the needed minimum triggering voltage by the partial voltage strategy of an auxiliary valve, can meet the sample taking energy by increasing primary oscillating process, and can fully test and verify the triggering reliability of the valve and the accuracy of the design of a valve taking energy unit. DC heavy current is provided by a six-pulse rectifier bridge, and the wave form is basicallythe same as that of the actual working condition.
Owner:CHINA ELECTRIC POWER RES INST +1
Transportation device design supporting device
InactiveCN1725224AHigh equivalenceSimple verification of performanceCooking-vessel materialsTotal factory controlSupporting systemDesign support system
The present invention provides a design and support system for a conveying device that can eliminate the departure between the design of the conveying device, which is made according to the required transportation route and transport capacity, and the actual operation state, so as to realize the smooth transition from the design stage to the actual operation stage; and the device can speculate and evaluate the influence of the changes of the applied devices, the device number, the arrangement and so on in the actual operation stage. The virtual conveying device, which is designed according tothe required transportation route and the transport capacity, can orderly reflect the test results of performances of the manufactured actual equipment and the test results of performances of the actual equipment in the actual operation, thereby implementing the actual operation process.
Owner:DAIFUKU CO LTD
High voltage thyristor valve multi-injection test method
ActiveUS8339151B2High equivalenceGood flexibilityIndividual semiconductor device testingMulti injectionTest requirements
Owner:CHINA ELECTRIC POWER RES INST
Design method and application of close type speech audiometry vocabulary
ActiveCN106859660AHigh equivalenceImprove efficiencyAudiometeringSensorsMedical equipmentDependability
The invention discloses a design method and application of a close type speech audiometry vocabulary. The design method of the close type speech audiometry vocabulary comprises the steps of of 1, that the close type speech audiometry vocabulary comprises K vocabularies is set, wherein each vocabulary comprises H testing groups, the testing groups comprise testing items and confusing items, the length of the vocabulary is H, and H is any positive integral; 2, according to principles of shortness, phonemic balance, common use, coverage and equivalence, the K vocabularies are compiled in the step 1; 3, the close type speech audiometry vocabulary is calculated; 4, a testee conducts speech audiometry in a relatively quiet environment; 5, the audiometry is finished; 6, audiometry result calculation is conducted through a speech audiometry system according to the following steps.
Owner:TSINGHUA UNIV
Lunar soil simulant by low gravity for drilling
ActiveCN109580301APreserve the influence of drilling mechanical fluctuation characteristicsHigh equivalencePreparing sample for investigationChemical compositionLunar soil
Owner:BEIJING SATELLITE MFG FACTORY
Back-to-back test method of VSC-HVDC MMC valve stable state operation test
ActiveCN102323546BReduce capacity requirementsReduce frequencyAc-dc conversionCircuit interrupters testingCapacitanceStable state
Owner:CHINA ELECTRIC POWER RES INST +1
Multi-axis load equivalent processing method and device, computer equipment and medium
PendingCN112100563AHigh equivalenceImprove accuracyComplex mathematical operationsSustainable transportationLoad cycleSimulation
The invention discloses a multi-axis load equivalent processing method and device, computer equipment and a medium, and aims to improve the equivalence and accuracy of equivalent loads loaded by a test bed. The method comprises the following steps: projecting a multi-axis load into a load space to obtain decomposed loads in a plurality of directions; performing pseudo damage calculation on the decomposition loads in the multiple directions to obtain pseudo damage of the decomposition loads; determining the total pseudo damage of the decomposition load according to the pseudo damage of the decomposition load and the cycle index of the multi-axis load; initializing equivalent load cycle index, and constructing an equivalent load formula in a preset signal form corresponding to decompositionloads in a plurality of directions; determining a total pseudo damage formula corresponding to the equivalent load according to the equivalent load cycle index and the equivalent load formula; makingthe total pseudo damage of the decomposition loads in the multiple directions to be equal to the total pseudo damage formula corresponding to the equivalent loads, so that a load equivalent relation formula is obtained, and iterative solution is conducted to obtain parameters of the equivalent load formula; and obtaining an equivalent load corresponding to the equivalent load formula according tothe parameters.
Owner:GUANGZHOU AUTOMOBILE GROUP CO LTD
Active intervention type arc extinguishing device test system
ActiveCN113030636AIncrease system capacityHigh equivalenceFault location by conductor typesShort-circuit testingSystem capacitySwitchgear
The invention discloses an active intervention type arc extinguishing device test system, which belongs to the field of substation automatic detection systems and comprises a substation subsystem, a line subsystem and a fault simulation subsystem. The substation subsystem comprises a laboratory incoming line isolation power supply, a primary switch device, a secondary monitoring and protection device and a neutral point operation mode simulation unit. The line subsystem adopts an outgoing line simulation mode shared by real lines and simulation lines, including three real lines and three simulation lines. The fault simulation subsystem comprises a fault simulation unit, a current transformer and a voltage transformer. The system capacity of the test system of the power distribution network fault detection and processing device can be expanded, and the equivalence and repeatability of the test environment of the power distribution network are improved, so that the test capability of the power distribution network fault detection device and the credibility of the test result are improved; a professional, efficient and authoritative test detection platform is provided for power distribution network fault processing key technology research, related standard formulation and device detection.
Owner:STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
Load spectrum processing method and device, equipment and storage medium
The invention provides a load spectrum processing method, device and equipment and a storage medium, and the method comprises the steps: collecting a load spectrum of an automobile part, carrying out the cyclic statistics, level crossing counting and other processing of a time domain load in the load spectrum, and generating a preliminary equivalent load block spectrum; and respectively calculating pseudo damage values of the load spectrum and the initial equivalent load block spectrum, and correcting the initial equivalent load block spectrum according to the pseudo damage values to obtain the equivalent load block spectrum. According to the technical scheme, when the random load spectrum is converted into the equivalent load block spectrum, the influences of the average value and the maximum value of the loads and the phase relation among the multiple loads are considered, the equivalence of the equivalent loads loaded in the automobile part durability test is improved, and meanwhile the accuracy of the durability test result is improved; the fatigue endurance test process of automobile parts is simplified, and the time cost is saved.
Owner:中汽检测技术有限公司 +1
A risk assessment method for live work of cable terminals based on human body surface electric field
ActiveCN112906257BImprove securityAccurate potential distributionDesign optimisation/simulationResourcesHuman bodyRisk level
Owner:JIANGSU ELECTRIC POWER CO
Plasma jet trigger gap test device and test method
Plasma jet trigger gap test device and test method, in the plasma jet trigger gap test device, one end of the charging circuit breaker QF1 is connected to a DC power supply, the other end is connected to the high voltage output end of the capacitor bank CS, and the other end of the capacitor bank CS is grounded; the test circuit breaker QF2 One end is connected to the high-voltage output end of the capacitor bank CS, one end of the reactor L is connected to the test circuit breaker QF2, and the other end is connected to the high-voltage end of the fast mechanical switch S; the high-voltage end of the resistor divider PT is connected to the high-voltage end of the plasma jet trigger gap TSG, and the other end One end is connected to the ground, the Rogowski coil CT is set on the low-voltage end of the plasma jet trigger gap TSG, one end of the protective ball gap BQ is connected to the high-voltage end of the fast mechanical switch S, and the other end is connected to the ground, and the input end of the controller is divided by the resistor The controller PT measurement signal is connected, the first output terminal of the controller is connected with the driving input terminal of the drive module, and the second output terminal is connected with the fast mechanical switch S control terminal.
Owner:XI AN JIAOTONG UNIV
Service test method of minimum trigger angle of DC converter valve with asymmetric voltage
ActiveCN101776733BFlexible adjustmentHigh equivalenceCircuit interrupters testingIndividual semiconductor device testingElectric power systemWave shape
The invention provides a service test method of minimum trigger angle of DC converter valve with asymmetric voltage, belonging to the field of power electronics and electric power system simulated test. The invention causes test object voltage to rise to the needed value by triggering an auxiliary valve in proper time within the period of voltage source charging, test object voltage wave shape is approximate to the practical working condition; DC heavy current is provided by six pulsation rectifier bridges, and the wave shape is almost the same with the practical working condition.
Owner:CHINA ELECTRIC POWER RES INST +1
Design method and application of a closed speech audiometry vocabulary
ActiveCN106859660BHigh equivalenceImprove efficiencyAudiometeringSensorsMedical equipmentDependability
The invention discloses a design method and application of a close type speech audiometry vocabulary. The design method of the close type speech audiometry vocabulary comprises the steps of of 1, that the close type speech audiometry vocabulary comprises K vocabularies is set, wherein each vocabulary comprises H testing groups, the testing groups comprise testing items and confusing items, the length of the vocabulary is H, and H is any positive integral; 2, according to principles of shortness, phonemic balance, common use, coverage and equivalence, the K vocabularies are compiled in the step 1; 3, the close type speech audiometry vocabulary is calculated; 4, a testee conducts speech audiometry in a relatively quiet environment; 5, the audiometry is finished; 6, audiometry result calculation is conducted through a speech audiometry system according to the following steps.
Owner:TSINGHUA UNIV
An active intervention type arc suppression device test system functional system
ActiveCN112986743BHigh equivalenceGood repeatabilityShort-circuit testingPerformance indexSystems simulation
Owner:STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
DC converter valve minimum triggering angle running test method
ActiveCN101776732BEasy to adjustReduce control difficultyCircuit interrupters testingIndividual semiconductor device testingPower flowWave form
The invention provides a DC converter valve minimum triggering angle running test method, belonging to the fields of power electronics and electrical power system simulated experiment. The method realizes the needed minimum triggering voltage by the partial voltage strategy of an auxiliary valve, can meet the sample taking energy by increasing primary oscillating process, and can fully test and verify the triggering reliability of the valve and the accuracy of the design of a valve taking energy unit. DC heavy current is provided by a six-pulse rectifier bridge, and the wave form is basically the same as that of the actual working condition.
Owner:CHINA ELECTRIC POWER RES INST +1
Plasma jet trigger gap test device and test method
According to the plasma jet trigger gap testing device and method, one end of a charging circuit breaker QF1 is connected with a direct-current power supply, the other end of the charging circuit breaker QF1 is connected with the high-voltage output end of a capacitor bank CS, and the other end of the capacitor bank CS is grounded; one end of the test circuit breaker QF2 is connected with the high-voltage output end of the capacitor bank CS, one end of the reactor L is connected with the test circuit breaker QF2, and the other end is connected with the high-voltage end of the quick mechanicalswitch S; the high-voltage end of the resistance voltage divider PT is connected with the high-voltage end of the plasma jet trigger gap TSG; the other end is connected with the ground, the Rogowski coil CT is sleeved at the low-voltage end of the plasma jet trigger gap TSG; one end of the protection sphere gap BQ is connected with the high-voltage end of the quick mechanical switch S, the other end is connected with the ground, the input end of the controller is connected with a resistance voltage divider PT measurement signal, the first output end of the controller is connected with the driving input end of the driving module, and the second output end is connected with the control end of the quick mechanical switch S.
Owner:XI AN JIAOTONG UNIV
Human body phantom for radiation dose measurement and preparation method and application thereof
PendingCN113331852AHigh equivalenceReduce pollutionGeometric CADX/gamma/cosmic radiation measurmentHuman bodyRadiation risk
The invention discloses a preparation method of a human body phantom for radiation dose measurement. The preparation method comprises the steps that (1) a whole body CT image of a human body is obtained through scanning, and a file for 3D printing is generated; (2) software is utilized to extract information of phantom outer contours, bone tissues and main organs recorded in the file, optimization design is performed, and an optimized 3D printing file is obtained; (3) according to the optimized 3D printing file, a 3D printing process is adopted to perform printing to obtain a phantom main body and the main organs, and then the printed organs are assembled to the corresponding positions of the organs in the phantom main body respectively; and (4) bone equivalent colloid is prepared and poured into a cavity, corresponding to the bone tissues, in the phantom main body, and the human body phantom is obtained after curing. The human body phantom covers eight different organs, the organs can be detached, the density deviation of the radiation sensitive organs is not greater than 3%, and a platform is provided for radiation risk assessment of astronauts in the future.
Owner:SUZHOU UNIV
Six-degree-of-freedom space manipulator ground microgravity equivalent experimental device and experimental method
ActiveCN105551366BSolve the problem of multi-axis coupling linkage of degrees of freedomHigh equivalenceEducational modelsExperimental methodsSimulation
Owner:BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS +1
A two-level voltage source DC circuit breaker synthesis test circuit and method
ActiveCN112630640BHigh equivalenceRealize switchingElectrical measurement instrument detailsCircuit interrupters testingDc circuit breakerVoltage source
The present invention provides a DC circuit breaker synthetic test circuit and method with a two-level voltage source, including a current source and a two-level voltage source, wherein both the current source and the two-level voltage source are connected in parallel to the DC circuit breaker of the test product Both ends; the present invention uses a two-level voltage source equivalent transient breaking voltage, which can not only ensure sufficient transient breaking voltage and duration during the test, but also provide the DC system voltage that the DC circuit breaker needs to withstand after breaking , the test circuit is simple and has high equivalence; the cooperation between the current source and the two-level voltage source can be equivalent to the current and voltage stress that is more consistent with the actual breaking of the DC circuit breaker, so that the breaking performance of the DC circuit breaker is reliable. Verification, the capacity of the test circuit is small, the structure is simple, and the economy is high.
Owner:XI AN JIAOTONG UNIV
An active intervention type arc suppression device test system
ActiveCN113030636BIncrease system capacityHigh equivalenceFault location by conductor typesShort-circuit testingSystem capacitySwitchgear
The invention discloses an active intervention type arc suppression device test system, belonging to the field of substation automation detection system, which includes a substation subsystem, a line subsystem and a fault simulation subsystem; the substation subsystem includes a laboratory incoming line isolation Power supply, primary switchgear, secondary monitoring and protection equipment, neutral point operation mode simulation unit; line subsystem adopts the outlet simulation mode shared by real lines and simulated lines, with 3 real lines and 3 simulated lines; fault simulation subsystem Including fault simulation unit, current transformer and voltage transformer. The invention can expand the system capacity of the test system of the distribution network fault detection and processing device, improve the equivalence and repeatability of the test environment of the distribution network, thereby improving the test capability of the distribution network fault detection device and the credibility of the test results To provide a professional, efficient and authoritative testing and testing platform for key technology research on distribution network fault handling, formulation of relevant standards, and device testing.
Owner:STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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