CN105301520A - Adjustable nonlinear load configuration system - Google Patents
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Abstract
Provided is an adjustable nonlinear load configuration system which can be used for calibration test and performance verification of power grid equipment such as an uninterruptible power supply, a power conditioner and the like. The adjustable nonlinear load configuration system is characterized by comprising a power input part, a voltage and current measuring unit, a full-wave rectification part, an adjustable capacitor load part, an adjustable resistor load part, a control unit, and a user interface unit which are successively connected. The controller unit is connected with the program control switches of capacitors in the adjustable capacitor load part and the program control switches of resistors in the adjustable resistor load part via a controlled quantity output module, and is connected with a capacitive current measuring device and a resistive current measuring device in the voltage and current measuring unit, and an AC current measuring device and an AC voltage measuring device in the power input part. The adjustable capacitor load part is formed by multiple capacitors in parallel. The adjustable resistor load part is formed by multiple resistors in parallel.
Description
Technical field
The present invention relates to the load configuration technology in power supply test, particularly a kind of adjustable nonlinear load configuration-system.
Background technology
To calibration testing and the performance verification of the grid equipment such as uninterrupted power source, power conditioner, need to carry out load configuration, but, market does not also have similar product, so the present invention can fill up blank in the market.
Summary of the invention
The present invention is directed to the defect or deficiency that exist in prior art, a kind of adjustable nonlinear load configuration-system is provided, topological form is provided to determine, power, power factor are adjustable, the number of phases is adjustable, can the nonlinear load of cascade, in the test to the grid equipment such as uninterrupted power source, power conditioner, adjustable nonlinear load condition is provided, can be used in the calibration testing to the grid equipment such as uninterrupted power source, power conditioner and performance verification.
Technical scheme of the present invention is as follows:
Adjustable nonlinear load configuration-system, is characterized in that, comprise power input, voltage and current measurement unit, full-wave rectification part, tunable capacitor loading section, adjustable resistance loading section, controller unit;
Described power input connects the output terminal of tested power supply, and connect tunable capacitor loading section and adjustable resistance loading section by full-wave rectification part, described voltage and current measurement unit comprises capacitance current voltage measuring apparatus, resistor current voltage measuring apparatus, ac current measurement device and ac voltage measurement device, the alternating voltage exported for the voltage of measuring voltage on capacitive load respectively and flow through on the electric current of capacitive load, ohmic load and the electric current flowing through ohmic load and tested power supply and electric current, described tunable capacitor loading section comprises many electric capacity be connected in parallel, described adjustable resistance loading section comprises the resistance that many electricity are connected in parallel, described controller unit comprises the controlled quentity controlled variable output module be connected with MCU control chip respectively, analog measurement module, described controlled quentity controlled variable output module connects each resistance of each electric capacity in described tunable capacitor loading section and described adjustable resistance loading section respectively by programmed switch, capacitance current voltage measuring apparatus described in described analog measurement model calling, resistor current voltage measuring apparatus, ac current measurement device and ac voltage measurement device.
Described power input comprises A phase/single-phase L input, B phase inputs, C phase inputs and inputs with N phase, described N phase inputs and connects tested zero-power line, when described tested power supply is single phase poaer supply, described A phase/single-phase L input connects the fire wire output end of single phase poaer supply, when described tested power supply is three-phase supply, described A phase/single-phase L input, B phase input, C phase inputs the A phase, B phase, the C phase firewire output terminal that connect tested power supply;
Described power input also comprises 2 groups of switches, wherein 1 group of switch is turn on-switch, comprise A be connected switch, the C of switch, B that be connected to be connected switch, be connected to described A phase/single-phase L input, B phase inputs, C phase inputs the input port inputted with N phase, input the independence inputted with C phase connect control for A phase/single-phase L input, B phase, another group switch is single-phase/three-phase function change-over switch, switch between single-phase and three-phase two kinds of mode of operations for controlling adjustable nonlinear load, when described single-phase/three-phase function change-over switch is connected, loaded work piece is in single-phase mode, switch is by B phase, the bypass of C commutating phase bridge, adjustable nonlinear load inputs the input as live wire and zero line by A phase/single-phase L input and N phase, AC power is supplied to electric capacity after A phase/single-phase rectification bridge, ohmic load, now A, B, the capacitive load of C three-phase, ohmic load all can be supplied to single phase poaer supply as load unit and use, the basis meeting standard topology requirement utilizes resource in load to a greater extent, when described single-phase/three-phase function change-over switch disconnects, loaded work piece is in three phase modes, now by-pass switch disconnects, adjustable nonlinear load is inputted by A phase/single-phase L, B phase inputs, C phase inputs, N phase inputs input as triple-phase line and zero line, AC power is supplied to respective electric capacity, ohmic load after A phase, B phase, C phase power are respectively by respective rectifier bridge, now the rectifier bridge of A, B, C three-phase and capacitive load, ohmic load are all only supplied to every power and use, and guarantee that equipment meets the requirement of standard for structural topology.
Further, wherein, described system at least comprises following four kinds of working methods, little power single phase mode, high-power single-phase mode, miniwatt three-phase mode, high power three-phase mode.
Further, wherein, when adopting miniwatt individual event mode to work, disconnect single-phase/three-phase function change-over switch, load is set to three-phase mode of operation, and the arbitrary power input interface inputted mutually as system in turn on-switch choice for use A/B/C three-phase connects the output of tested power firestreak, N phase is inputted and is connected to the output of tested zero-power line, now the power flow direction of system inputs load phase electric capacity selected by load commutating phase circuit-> selected by-> mutually for power supply exports load selected by L->, load commutating phase circuit-> load N phase selected by ohmic load-> inputs-> power supply and exports N.。
Further, wherein, when adopting high-power individual event mode to work, connect single-phase/three-phase function change-over switch, load is set to single-phase mode of operation, A phase/single-phase input is used to connect the output of tested power firestreak as the power input interface of system, N phase is inputted and is connected to the output of tested zero-power line, now the power flow direction of system is that power supply exports L-> load A phase/single-phase input-> load A phase/single phase rectifier circuit-> load A/B/C three phase capacitance, ohmic load-> load A phase/single phase rectifier circuit-> load N phase inputs-> power supply and exports N.
Further, wherein, when adopting miniwatt three-phase mode to work, disconnect single-phase/three-phase function change-over switch, load is set to three-phase mode of operation, use A phase, B phase, C phase, the N phase power input interface inputted as system connects tested power supply A/B/C/N phase and exports, now the power flow direction of system is that power supply exports-> load A/B/C three-phase input-> load A/B/C rectified three-phase circuit-> load A/B/C three phase capacitance, ohmic load-> load A/B/C rectified three-phase circuit-> load N phase inputs-> power supply and exports N.
Further, wherein, when adopting high power three-phase mode to work, disconnect single-phase/three-phase function change-over switch, load is set to three-phase mode of operation, use 3 adjustable nonlinear loads, respectively as A, B, the load of C three-phase, the power input interface A phase of every platform nonlinear load/single-phase input and N phase inputted as system is connected tested power supply and exports mutually, now the power flow direction of system is that power supply exports-> load 1, 2, A phase/single-phase input-> the load 1 of 3, 2, A phase/single-phase rectified three-phase circuit-> the load 1 of 3, 2, the A/B/C three phase capacitance of 3, ohmic load-> load 1, 2, A phase/single-phase rectified three-phase circuit-> the load 1 of 3, 2, the N phase of 3 inputs-> power supply and exports N.
Described controller unit also comprises user interface module and state display module, described MCU control chip connects user interface module and state display module respectively, for completing the control to system switching amount, the correcting process of measuring amount, and according to user's setting, the function of automatic configuration load state.
Described tunable capacitor loading section and adjustable resistance loading section are operated in the direct current component after full-wave rectification part, receive and consume the DC power from rectification module in full-wave rectification part, electric capacity and resistance constitute RC timing circuit, the make-and-break time of rectification module can be controlled, by different electric capacity, resistance combination to adjust different rectification module duties, change power and the power factor of nonlinear load consumption thus; The programmed switch be all connected by every capacitive load and every ohmic load is arranged, and selects specific electric capacity and ohmic load connecting system, thus changes power and the power factor of nonlinear load; System has the function of automatic calculating simultaneously, by power input and power factor value, automatically can calculate the electric capacity and resistance that need access, and the switch execution controlling correspondence opens or closes work, completes Lookup protocol.The function of adjustable nonlinear load is, in the test to the grid equipment such as uninterrupted power source, power conditioner, there is provided adjustable nonlinear load condition, to realize: 1) under nonlinear load full power condition, to the measurement of tested power-efficient, input power factor; 2) under steady-state variance loading condition, to the measurement of tested power supply output waveform, waveform distortion, basic content, harmonic content; 3) under nonlinear load Spline smoothing condition, to the measurement of tested power supply offset voltage.
Technique effect of the present invention is as follows: adjustable nonlinear load configuration-system of the present invention provides topological form to determine, power, power factor are adjustable, and the number of phases is adjustable, can the nonlinear load of cascade.Can be used for the calibration testing to the grid equipment such as uninterrupted power source, power conditioner and performance verification.Its advantage that can obtain after implementing is: 1) topological form meets standard-required.Under each mode of operation, topological form all meets the topological requirement for " reference nonlinear load " in international IEC standard IEC 62040.3 and GB GB7260.3 " method and test of no-break power unit (UPS) the 3rd part determination performance requires ".2) power, power factor scope is adjustable.The power that user can be needed by load interface configurations and power factor scope, after being calculated, automatically control the electric capacity of rectifier bridge DC terminal, ohmic load access quantity, can realize the full test to Power supply belt nonlinear load performance by MCU.3) number of phases is adjustable, strong adaptability.Under three phase modes, arbitrary single-phase load that all can be used as mutually accesses; Also three-phase can be accessed simultaneously, use as threephase load; When single-phase power can not meet the demands, single-phase mode can be switched to by " single-phase/three-phase " change-over switch, use as great power single phase load, or 3 cascades, use as high power three-phase load.4) the built-in measurement of system, control circuit, after user's configuration, can realize, to the automatic test of tested power supply, comprising nonlinear parameter, transient parameter etc. as requested.5) cost is low, is easy to realize.System is made up of common rectifier bridge, electric capacity, resistance etc., with low cost, be simple and easy to realize.
Accompanying drawing explanation
Fig. 1 implements adjustable nonlinear load configuration-system schematic diagram of the present invention.
Fig. 2 is the load configuration schematic diagram under little power single phase condition.
Fig. 3 is the load configuration schematic diagram under high-power single-phase condition.
Fig. 4 is the load configuration schematic diagram under high power three-phase condition.
Fig. 5 is adjustable nonlinear load configuration-system 3 the cascade schematic diagram under high power three-phase condition.
Fig. 6 is tunable capacitor load and adjustable resistance support structures schematic diagram.
Embodiment
Below in conjunction with accompanying drawing Fig. 1-Fig. 6, the present invention will be described.
Fig. 1 implements adjustable nonlinear load configuration-system schematic diagram of the present invention.As shown in Figure 1, adjustable nonlinear load configuration-system, is characterized in that, comprises the power input connected successively, voltage and current measurement unit, full-wave rectification part, tunable capacitor loading section, adjustable resistance loading section, controller unit, and user interface elements; Programmed switch that is that described controller unit connects each electric capacity in described tunable capacitor loading section by controlled quentity controlled variable output module and each resistance of described adjustable resistance loading section, described controller unit is by the ac current measurement device of the capacitance current measurement device in voltage and current measurement unit described in analog measurement model calling, resistor current measurement mechanism, power input and ac voltage measurement device; Described tunable capacitor loading section consists of the mode of many Capacitance parallel connections, and described adjustable resistance loading section consists of the mode of many resistor coupled in parallel.Described power input comprises A phase/single-phase L input, B phase inputs, C phase inputs and inputs with N phase, the tested three-phase supply live wire in A phase, B phase three phase modes corresponding with C, the corresponding tested zero-power line of N.Described power input comprises 2 groups of switching values, and wherein 1 group of switch is turn on-switch, adjacent with input port, inputs the independence inputted with C phase connect control for A phase/single-phase L input, B phase; Another group switch is single-phase/three-phase function change-over switch, switches between single-phase and three-phase two kinds of mode of operations for controlling adjustable nonlinear load.Described switching between single-phase and three-phase two kinds of mode of operations refers to: when described single-phase/three-phase function change-over switch is connected, loaded work piece is in single-phase mode, switch is by B phase, the bypass of C commutating phase bridge, adjustable nonlinear load inputs the input as live wire and zero line by A phase/single-phase L input and N phase, AC power is supplied to electric capacity after A phase/single-phase rectification bridge, ohmic load, now A, B, the capacitive load of C three-phase, ohmic load all can be supplied to single phase poaer supply as load unit and use, the basis meeting standard topology requirement utilizes resource in load to a greater extent, when described single-phase/three-phase function change-over switch disconnects, loaded work piece is in three phase modes, now by-pass switch disconnects, adjustable nonlinear load is inputted by A phase/single-phase L, B phase inputs, C phase inputs, N phase inputs input as triple-phase line and zero line, AC power is supplied to respective electric capacity, ohmic load after A phase, B phase, C phase power are respectively by respective rectifier bridge, now the rectifier bridge of A, B, C three-phase and capacitive load, ohmic load are all only supplied to every power and use, and guarantee that equipment meets the requirement of standard for structural topology.Described tunable capacitor loading section and adjustable resistance loading section are operated in the direct current component after full-wave rectification part, receive and consume the DC power from rectification module in full-wave rectification part, electric capacity and resistance constitute RC timing circuit, the make-and-break time of rectification module can be controlled, by different electric capacity, resistance combination to adjust different rectification module duties, change power and the power factor of nonlinear load consumption thus; The programmed switch be all connected by every capacitive load and every ohmic load is arranged, and selects specific electric capacity and ohmic load connecting system, thus changes power and the power factor of nonlinear load; System has the function of automatic calculating simultaneously, by power input and power factor value, automatically can calculate the electric capacity and resistance that need access, and the switch execution controlling correspondence opens or closes work, completes Lookup protocol.The function of adjustable nonlinear load is, in the test to the grid equipment such as uninterrupted power source, power conditioner, there is provided adjustable nonlinear load condition, to realize: 1) under nonlinear load full power condition, to the measurement of tested power-efficient, input power factor; 2) under steady-state variance loading condition, to the measurement of tested power supply output waveform, waveform distortion, basic content, harmonic content; 3) under nonlinear load Spline smoothing condition, to the measurement of tested power supply offset voltage.
Adjustable nonlinear load configuration-system mainly comprises 7 parts such as power input, full-wave rectification, tunable capacitor load, adjustable resistance load, voltage and current measurement unit, controller unit, user interface, status display interface.
About power input: power input is leftmost side part in Fig. 1, by A phase/single-phase L inputs, B phase inputs, C phase inputs, N phase inputs and forms, for accessing the power input of civil power or UPS in testing, mainly solve measurand and be divided into single-phase and problem that is three-phase two kinds of output forms, guarantee the adaptability to dissimilar testing power supply: in single phase poaer supply test, use wherein A phase/single-phase L input and N phase to input the input as live wire and zero line; In three-phase supply test, use A phase/single-phase L input, B phase inputs, C phase inputs to input with N phase and input mutually as each.Power input also comprises 2 groups of switching values, and wherein 1 group of switch next-door neighbour input port, controls for the connection that A phase/single-phase L inputs, B phase inputs, C phase inputs, another group switching value switches between single-phase and three-phase two kinds of mode of operations for controlling adjustable nonlinear load: 1) when a switch is on, loaded work piece is in single-phase mode, switch is by B phase, the bypass of C commutating phase bridge, adjustable nonlinear load inputs the input as live wire and zero line by A phase/single-phase L input and N phase, AC power is supplied to electric capacity after A phase/single-phase rectification bridge, ohmic load, now A, B, the capacitive load of C three-phase, ohmic load all can be supplied to single phase poaer supply as load unit and use, the basis meeting standard topology requirement has maximally utilised the resource in load.2) when the switches are opened, loaded work piece is in three phase modes, now by-pass switch disconnects, adjustable nonlinear load is inputted by A phase/single-phase L, B phase inputs, C phase inputs, N phase inputs input as triple-phase line and zero line, AC power is supplied to respective electric capacity, ohmic load after A phase, B phase, C phase power are respectively by respective rectifier bridge, now the rectifier bridge of A, B, C three-phase and capacitive load, ohmic load all only improve and use to every power, guarantee that equipment meets the requirement of standard for structural topology.
Service condition is divided into 4 kinds:
A) little power single phase condition, as shown in Figure 2, under this condition, the arbitrary power input interface inputted mutually as system in A/B/C three-phase can be used to connect the output of tested power firestreak, N phase is inputted and is connected to the output of tested zero-power line, disconnect single-phase/three-phase function change-over switch simultaneously, load is set to three-phase mode of operation.To select B phase for input end, now the power flow direction of system is that power supply output L-load B phase inputs-load B commutating phase circuit-load B phase electric capacity, ohmic load-load B commutating phase circuit-load N phase inputs-power supply output N.
B) high-power single-phase condition, as shown in Figure 3, under this condition, A phase/single-phase input is used to connect the output of tested power firestreak as the power input interface of system, N phase is inputted and is connected to the output of tested zero-power line, connect single-phase/three-phase function change-over switch simultaneously, load is set to single-phase mode of operation, now the power flow direction of system be that power supply exports L-load A phase/single-phase input-load A phase/single phase rectifier circuit-load A/B/C three phase capacitance, ohmic load-load A phase/single phase rectifier circuit-load N phase inputs-power supply exports N.
C) miniwatt three-phase condition, as shown in Figure 4, under this condition, use A phase, B phase, C phase, the N phase power input interface inputted as system to connect tested power supply A/B/C/N phase to export, disconnect single-phase/three-phase function change-over switch simultaneously, load is set to three-phase mode of operation, now the power flow direction of system is power supply output-load A/B/C three-phase input-load A/B/C rectified three-phase circuit-load A/B/C three phase capacitance, ohmic load-load A/B/C rectified three-phase circuit-load N phase inputs-power supply exports N.
D) high power three-phase condition, as shown in Figure 5, under this condition, use 3 adjustable nonlinear loads, respectively as A, B, the load of C three-phase, the power input interface A phase of every platform nonlinear load/single-phase input and N phase inputted as system is connected tested power supply and exports mutually, connect single-phase/three-phase function change-over switch simultaneously, load is set to single-phase mode of operation, now the power flow direction of system is power supply output-load 1, 2, A phase/single-phase input-the load 1 of 3, 2, A phase/single-phase rectified three-phase circuit-the load 1 of 3, 2, the A/B/C three phase capacitance of 3, ohmic load-load 1, 2, A phase/single-phase rectified three-phase circuit-the load 1 of 3, 2, the N phase of 3 inputs-power supply output N.
About full-wave rectification part: full-wave rectification part is used for carrying out full-wave rectification to the AC power of input, obtain DC power, full-wave rectification part adopts the non-control rectifier system of diode of recommending in GB GB7260.3 " method and test of no-break power unit (UPS) the 3rd part determination performance requires " to complete.When selecting rectification circuit, A phase can be chosen as B phase, three times of C phase power so that when switching to single-phase mode, use A commutating phase circuit as the rectification circuit of whole load, meet standard-required on the topology on the one hand, save the manufacturing cost of equipment on the one hand.
About tunable capacitor load and adjustable resistance loading section: as shown in Figure 6, tunable capacitor load and adjustable resistance loading section are operated in the direct current component after rectification circuit, formed by the mode of many electric capacity, resistor coupled in parallel, receive and consume the DC power from rectification module, electric capacity and resistance constitute RC timing circuit, the make-and-break time of rectification module can be controlled, the combination of different electric capacity, resistance can adjust different rectification module duties, changes power and the power factor of nonlinear load consumption thus.Every electric capacity and ohmic load are all connected with programmed switch, by arranging, can select specific electric capacity and ohmic load connecting system, thus change power and the power factor of nonlinear load.System has the function of automatic calculating simultaneously, by power input and power factor value, automatically can calculate the electric capacity, the resistance that need access, and the switch execution controlling correspondence opens or closes work, the Lookup protocol of finishing equipment.
About voltage and current measurement unit: as shown in Figure 1, voltage and current measurement unit is divided into 3 parts, and Part I is used for the alternating voltage of test input (namely tested power supply export) and electric current, the power born for computational load and power factor; Part II is used for the voltage in testing capacitor load and the electric current by capacitive load, and Part III is used for the voltage in test resistance load and the electric current by ohmic load.
About controller unit, user interface: controller unit selects single-chip microcomputer, liquid crystal display, mainly completes the control to system switching amount, the correcting process of measuring amount, set the functions such as automatic configuration load state according to user.
Herein means bright, more than describe and contribute to those skilled in the art and understand the invention, but and the protection domain of unrestricted the invention.Any enforcement improving the equivalent replacement described above, modification and/or delete numerous conforming to the principle of simplicity and carry out not departing from the invention flesh and blood, all falls into the protection domain of the invention.
Claims (10)
1. adjustable nonlinear load configuration-system, is characterized in that, comprises the power input connected successively, voltage and current measurement unit, full-wave rectification part, tunable capacitor loading section, adjustable resistance loading section, controller unit, and user interface elements; Programmed switch that is that described controller unit connects each electric capacity in described tunable capacitor loading section by controlled quentity controlled variable output module and each resistance of described adjustable resistance loading section, described controller unit is by the ac current measurement device of the capacitance current measurement device in voltage and current measurement unit described in analog measurement model calling, resistor current measurement mechanism, power input and ac voltage measurement device; Described tunable capacitor loading section consists of the mode of many Capacitance parallel connections.Described adjustable resistance loading section consists of the mode of many resistor coupled in parallel.
2. adjustable nonlinear load configuration-system according to claim 1, it is characterized in that, described power input comprises A phase/single-phase L input, B phase inputs, C phase inputs and inputs with N phase, tested three-phase supply live wire in A phase, B phase three phase modes corresponding with C, the corresponding tested zero-power line of N.
3. adjustable nonlinear load configuration-system according to claim 1, it is characterized in that, described power input comprises at least 2 group switching values, wherein 1 group of switch is turn on-switch, adjacent with input port, input the independence inputted with C phase connect control for A phase/single-phase L input, B phase; Another 1 group of switch is single-phase/three-phase function change-over switch, switches between single-phase and three-phase two kinds of mode of operations for controlling adjustable nonlinear load.
4. adjustable nonlinear load configuration-system according to claim 3, it is characterized in that, described switching between single-phase and three-phase two kinds of mode of operations refers to: when described single-phase/three-phase function change-over switch is connected, loaded work piece is in single-phase mode, switch is by B phase, the bypass of C commutating phase bridge, adjustable nonlinear load inputs the input as live wire and zero line by A phase/single-phase L input and N phase, AC power is supplied to electric capacity after A phase/single-phase rectification bridge, ohmic load, now A, B, the capacitive load of C three-phase, ohmic load all can be supplied to single phase poaer supply as load unit and use, the basis meeting standard topology requirement utilizes resource in load to a greater extent, when described single-phase/three-phase function change-over switch disconnects, loaded work piece is in three phase modes, now by-pass switch disconnects, adjustable nonlinear load is inputted by A phase/single-phase L, B phase inputs, C phase inputs, N phase inputs input as triple-phase line and zero line, AC power is supplied to respective electric capacity, ohmic load after A phase, B phase, C phase power are respectively by respective rectifier bridge, now the rectifier bridge of A, B, C three-phase and capacitive load, ohmic load are all only supplied to every power and use, and guarantee that equipment meets the requirement of standard for structural topology.
5. adjustable nonlinear load configuration-system according to claim 1, it is characterized in that, described tunable capacitor loading section and adjustable resistance loading section are operated in the direct current component after full-wave rectification part, receive and consume the DC power from rectification module in full-wave rectification part, electric capacity and resistance constitute RC timing circuit, the make-and-break time of rectification module can be controlled, by different electric capacity, resistance combination to adjust different rectification module duties, change power and the power factor of nonlinear load consumption thus; The programmed switch be all connected by every capacitive load and every ohmic load is arranged, and selects specific electric capacity and ohmic load connecting system, thus changes power and the power factor of nonlinear load; System has the function of automatic calculating simultaneously, by power input and power factor value, automatically can calculate the electric capacity and resistance that need access, and the switch execution controlling correspondence opens or closes work, completes Lookup protocol.
6. adjustable nonlinear load configuration-system according to claim 4, it is characterized in that, described system at least comprises following four kinds of working methods, little power single phase mode, high-power single-phase mode, miniwatt three-phase mode and form high power three-phase mode etc. together with other load configuration systems.
7. adjustable nonlinear load configuration-system according to claim 6, it is characterized in that: when adopting miniwatt individual event mode to work, disconnect single-phase/three-phase function change-over switch, load is set to three-phase mode of operation, and the arbitrary power input interface inputted mutually as system in turn on-switch choice for use A/B/C three-phase connects the output of tested power firestreak, N phase is inputted and is connected to the output of tested zero-power line, now the power flow direction of system inputs load phase electric capacity selected by load commutating phase circuit-> selected by-> mutually for power supply exports load selected by L->, load commutating phase circuit-> load N phase selected by ohmic load-> inputs-> power supply and exports N.
8. adjustable nonlinear load configuration-system according to claim 6, it is characterized in that: when adopting high-power individual event mode to work, connect single-phase/three-phase function change-over switch, load is set to single-phase mode of operation, A phase/single-phase input is used to connect the output of tested power firestreak as the power input interface of system, N phase is inputted and is connected to the output of tested zero-power line, now the power flow direction of system is that power supply exports L-> load A phase/single-phase input-> load A phase/single phase rectifier circuit-> load A/B/C three phase capacitance, ohmic load-> load A phase/single phase rectifier circuit-> load N phase inputs-> power supply and exports N.
9. adjustable nonlinear load configuration-system according to claim 6, it is characterized in that: when adopting miniwatt three-phase mode to work, disconnect single-phase/three-phase function change-over switch, load is set to three-phase mode of operation, use A phase, B phase, C phase, the N phase power input interface inputted as system connects tested power supply A/B/C/N phase and exports, now the power flow direction of system is that power supply exports-> load A/B/C three-phase input-> load A/B/C rectified three-phase circuit-> load A/B/C three phase capacitance, ohmic load-> load A/B/C rectified three-phase circuit-> load N phase inputs-> power supply and exports N.
10. adjustable nonlinear load configuration-system according to claim 6, it is characterized in that: when adopting high power three-phase mode to work, use 3 adjustable nonlinear loads, respectively as A, B, the load of C three-phase, the power input interface A phase of every platform nonlinear load/single-phase input and N phase inputted as system is connected tested power supply and exports mutually, connect the single-phase/three-phase function change-over switch of 3 loads simultaneously, load is set to single-phase mode of operation, now the power flow direction of system is that power supply exports-> load 1, 2, A phase/single-phase input-> the load 1 of 3, 2, A phase/single-phase rectified three-phase circuit-> the load 1 of 3, 2, the A/B/C three phase capacitance of 3, ohmic load-> load 1, 2, A phase/single-phase rectified three-phase circuit-> the load 1 of 3, 2, the N phase of 3 inputs-> power supply and exports N.
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| CN105866704A (en) * | 2016-05-27 | 2016-08-17 | 湖南福德电气有限公司 | Special test load box for UPSs (uninterruptable power supplies) |
| CN106405439A (en) * | 2016-10-14 | 2017-02-15 | 北京东方计量测试研究所 | Uninterrupted power supply dynamic characteristic automatic measurement and calibration device and method |
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| CN107248821A (en) * | 2017-08-07 | 2017-10-13 | 重庆博昂科技有限公司 | A kind of nonlinear load analogue means |
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| CN106526505B (en) * | 2016-10-14 | 2019-07-09 | 北京东方计量测试研究所 | Alternating current steady voltage plug non-linear belt loading capability characteristic test method and system |
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| CN110275050B (en) * | 2018-03-13 | 2021-10-26 | 株洲中车时代电气股份有限公司 | Network voltage mutation device and control method thereof |
| CN109870661A (en) * | 2019-02-25 | 2019-06-11 | 湖南福德电气有限公司 | High power continuous variable tunable load and its application method, computer readable storage medium |
| CN114114060A (en) * | 2021-11-27 | 2022-03-01 | 广东电网有限责任公司广州供电局 | UPS test method, device, system, storage medium and program product |
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