CN105301520B - Adjustable nonlinear load configures system - Google Patents
Adjustable nonlinear load configures system Download PDFInfo
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- CN105301520B CN105301520B CN201510827697.4A CN201510827697A CN105301520B CN 105301520 B CN105301520 B CN 105301520B CN 201510827697 A CN201510827697 A CN 201510827697A CN 105301520 B CN105301520 B CN 105301520B
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Abstract
Adjustable nonlinear load configures system, it can be used in the calibration test and performance verification to grid equipments such as uninterrupted power source, power conditioners, it is characterized in that, including the power input being sequentially connected, voltage and current measurement unit, full-wave rectification part, tunable capacitor loading section, adjustable resistance loading section, controller unit, and user interface elements；The controller unit connects the grammed switch of each electric capacity in the tunable capacitor loading section and described each resistance of adjustable resistance loading section by controlled quentity controlled variable output module, and the controller unit passes through analog measurement module and connects capacitance current measurement device, resistor current measurement apparatus, the ac current measurement device of power input and ac voltage measurement device in the voltage and current measurement unit；The tunable capacitor loading section is formed by way of more electric capacity are in parallel, and the adjustable resistance loading section is formed by way of more resistor coupled 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
System.
Background technology
Calibration test and performance verification to grid equipments such as uninterrupted power source, power conditioners, it is necessary to carry out load configuration,
But in the market is also without similar product, so, the present invention can fill up blank in the market.
The content of the invention
The present invention is for defect or deficiency present in prior art, there is provided a kind of adjustable nonlinear load configuration system
System, there is provided topological form determines that power, power factor are adjustable, and the number of phases is adjustable, the nonlinear load that can be cascaded, to uninterrupted
In the test of the grid equipments such as power supply, power conditioner, there is provided adjustable nonlinear load condition, can be used in uninterrupted electricity
The calibration test and performance verification of the grid equipments such as source, power conditioner.
Technical scheme is as follows：
Adjustable nonlinear load configures system, it is characterised in that including power input, voltage and current measurement list
Member, full-wave rectification part, tunable capacitor loading section, adjustable resistance loading section, controller unit；
The output end of the tested power supply of power input connection, and tunable capacitor is connected by full-wave rectification part and born
Part and adjustable resistance loading section are carried, the voltage and current measurement unit includes capacitance current voltage measuring apparatus, resistance electricity
Voltage measuring apparatus, ac current measurement device and ac voltage measurement device are flowed, for measuring the electricity on capacitive load respectively
Press and flow through the electric current of capacitive load, the voltage on ohmic load and flow through ohmic load electric current and tested power supply output
Alternating voltage and electric current；The tunable capacitor loading section includes the more electric capacity being connected in parallel, the adjustable resistance load portion
Dividing includes the resistance of more electrically in parallel connections, and the controlled quentity controlled variable that the controller unit includes being connected with MCU control chips respectively is defeated
Go out module, analog measurement module, the controlled quentity controlled variable output module connects the tunable capacitor load by grammed switch respectively
Each resistance of each electric capacity and the adjustable resistance loading section in part, the analog measurement module connect the electric capacity
Current-voltage measurement device, resistor current voltage measuring apparatus, ac current measurement device and ac voltage measurement device.
The power input includes A phases/single-phase L inputs, B phases are inputted, C phases are inputted and inputted with N phases, and the N phases are defeated
Enter the tested zero-power line of connection, when the tested power supply is single phase poaer supply, the fire of the A phases/single-phase L input connection single phase poaer supplies
Line output terminal, when the tested power supply is three phase mains, the A phases/single-phase L inputs, B phases input, C phases input the tested electricity of connection
The A phase, B phase, C phase fire wire output end in source；
The power input also includes 2 groups of switches, wherein 1 group of switch is ON switch, including A is connected switch, B
Be connected switch, C is connected switch, is connected to the A phases/single-phase L inputs, B phases input, C phases input what is inputted with N phases
Input port, input for A phases/single-phase L inputs, B phases and independently connect control with what C phases inputted；Another group of switch for it is single-phase/tri-
Phase function switch switchs, and for controlling adjustable nonlinear load to switch single-phase between two kinds of mode of operations of three-phase, works as institute
When stating single-phase/three-phase function switch switch connection, loaded work piece is switched B phases, the bypass of C commutating phases bridge in single-phase mode, adjustable
Integral expression nonlinear load is inputted the input as live wire and zero line by the input of A phases/single-phase L and N phases, and AC power passes through A phases/mono-
Electric capacity, ohmic load are supplied to after commutating phase bridge, now it is single to could act as load for the capacitive load of A, B, C three-phase, ohmic load
Member is supplied to single phase poaer supply to use, and utilizes the resource in load to a greater extent on the basis of standard topology requirement is met；When
When the single-phase/three-phase function switch switches off, loaded work piece disconnects in three phase modes, now by-pass switch, adjustable
Nonlinear load is by the input of A phases/single-phase L, B phases input, C phases input, N phases input input as triple line and zero line, exchange
Power by A phase, B phase, C phase power respectively by respective rectifier bridge after be supplied to respective electric capacity, ohmic load, now A,
B, the rectifier bridge of C three-phases and capacitive load, ohmic load are provided only to every power and used, it is ensured that equipment meet standard for
The requirement of structural topology.
Further, wherein, the system comprises at least following four working method, little power single phase mode, high-power
Uniphase mode, small-power three-phase mode, high power three-phase mode.
Further, wherein, when being worked using small-power individual event mode, single-phase/three-phase function switch switch is disconnected, will be negative
Load is set to three-phase mode of operation, and ON switch selection uses any phase in A/B/C three-phases to input the power as system
The tested power firestreak output of input interface connection, N phases are inputted and are connected to tested zero-power line output, now the power flow of system
L- is exported to for power supply>It is selected load mutually input->Selected load commutating phase circuit->Selected load phase electric capacity, ohmic load->
Selected load commutating phase circuit->Load N phases input->Power supply exports N..
Further, wherein, when being worked using high-power individual event mode, single-phase/three-phase function switch switch is connected, will be negative
Load is set to single-phase mode of operation, and it is defeated to connect tested power firestreak using A phases/single-phase input as the power input of system
Go out, N phases are inputted and are connected to tested zero-power line output, now the power flow direction of system is that power supply exports L->Load A phases/mono-
Mutually input->Load A phases/single phase rectifier circuit->Load A/B/C three phase capacitances, ohmic load->Load A phases/single-phase rectifier electricity
Road->Load N phases input->Power supply exports N.
Further, wherein, when being worked using small-power three-phase mode, single-phase/three-phase function switch switch is disconnected, will be negative
Load is set to three-phase mode of operation, and the tested power supply of power input connection as system is inputted using A phase, B phase, C phase, N phases
A/B/C/N phases export, now the power flow direction of system be power supply output->Load A/B/C three-phase inputs->Load A/B/C three-phases
Rectification circuit->Load A/B/C three phase capacitances, ohmic load->Load A/B/C rectified three-phase circuits->Load N phases input->Electricity
Source exports N.
Further, wherein, when being worked using high power three-phase mode, single-phase/three-phase function switch switch is disconnected, will be negative
Load is set to three-phase mode of operation, non-by every respectively as the load of A, B, C three-phase using 3 adjustable nonlinear loads
A phases/single-phase input and the N phases of linear load, which input, to be connected tested power supply as the power input of system and mutually exports, now
The power flow direction of system be power supply output->A phases/single-phase input of load 1,2,3->A phases/single-phase three-phase of load 1,2,3 is whole
Current circuit->Load 1,2,3 A/B/C three phase capacitances, ohmic load->A phases/single-phase rectified three-phase circuit of load 1,2,3->
Load 1,2,3 N phases input->Power supply exports N.
The controller unit also includes user interface module and state display module, the MCU control chips point
Not Lian Jie user interface module and state display module, for completing control to system switching amount, the amendment of measurement amount
Processing, and set according to user, automatically configure the function of load condition.
The tunable capacitor loading section and adjustable resistance loading section are operated in the direct current component behind full-wave rectification part,
Receive and consume the dc power of the rectification module in full-wave rectification part, electric capacity and resistance constitute RC timing circuits, energy
The make-and-break time of rectification module is enough controlled, by different electric capacity, resistance combination to adjust different rectification module working conditions,
Thus the power and power factor of nonlinear load consumption are changed；It is all connected with by every capacitive load and every ohmic load
Grammed switch is configured, and is selected specific electric capacity and ohmic load access system, so as to change the power of nonlinear load
And power factor；System has the function of calculating automatically simultaneously, by input power and power factor value, can calculate automatically
The electric capacity and resistance accessed is needed, and controls corresponding switch execution to open or close work, completes automatic set.Adjustable
The function of nonlinear load is, in the test to grid equipments such as uninterrupted power source, power conditioners, there is provided adjustable non-thread
Property loading condition, with realize：1) under the conditions of nonlinear load full power, the measurement to being tested power-efficient, input power factor；
2) under steady-state variance loading condition, the measurement to being tested power supply output waveform, wave distortion, basic content, harmonic content；3)
Under the conditions of nonlinear load Spline smoothing, the measurement to being tested power supply offset voltage.
The technique effect of the present invention is as follows：It is true that adjustable nonlinear load configuration system of the present invention provides topological form
Fixed, power, power factor are adjustable, and the number of phases is adjustable, the nonlinear load that can be cascaded.Available for uninterrupted power source, power conditioner
Deng the calibration test and performance verification of grid equipment.It can be achieved the advantage that after implementing：1) topological form meets that standard will
Ask.Under each mode of operation, topological form meets international IEC standard IEC 62040.3 and national standard GB 7260.3《Uninterrupted electricity
Source device (UPS) third portion determines method and the test requirements document of performance》In for " reference nonlinear load " topology require.
2) power, power factor scope is adjustable.User can by load interface configurations need power and power factor scope, by
After MCU is calculated, electric capacity, the ohmic load access quantity of rectifier bridge DC terminal are automatically controlled, can be achieved non-linear to Power supply belt negative
Carry comprehensive test of performance.3) number of phases is adjustable, strong adaptability.Under three phase modes, any phase can be used as single-phase load to access；
Three-phase can be accessed simultaneously, used as threephase load；When single-phase power can not meet to require, can by " it is single-phase/tri-
Phase " switching switch switches to single-phase mode, is used as great power single phase load, or 3 cascades, is loaded as high power three-phase
Use.4) the built-in measurement of system, control circuit, after user configuration, can realize the automatic survey to being tested power supply as requested
Examination, includes nonlinear parameter, transient parameter etc..5) cost is low, it is easy to accomplish.System is by common rectifier bridge, electric capacity, resistance etc.
Form, cost is cheap, simply easily realizes.
Brief description of the drawings
Fig. 1 is the adjustable nonlinear load configuration system schematic for implementing the present invention.
Fig. 2 is the load configuration schematic diagram under the conditions of little power single phase.
Fig. 3 is the load configuration schematic diagram under the conditions of high-power single-phase.
Fig. 4 is the load configuration schematic diagram under the conditions of high power three-phase.
Fig. 5 is 3 cascade schematic diagrames of adjustable nonlinear load configuration system under the conditions of high power three-phase.
Fig. 6 is tunable capacitor load and adjustable resistance support structures schematic diagram.
Embodiment
The present invention will be described by Fig. 1-Fig. 6 below in conjunction with the accompanying drawings.
Fig. 1 is the adjustable nonlinear load configuration system schematic for implementing the present invention.As shown in figure 1, adjustable
Nonlinear load configures system, it is characterised in that including the power input being sequentially connected, voltage and current measurement unit, entirely
Ripple rectifying part, tunable capacitor loading section, adjustable resistance loading section, controller unit, and user interface elements；It is described
Controller unit connects each electric capacity in the tunable capacitor loading section and described adjustable electric by controlled quentity controlled variable output module
The grammed switch of each resistance of loading section is hindered, the controller unit connects the voltage x current by analog measurement module and surveyed
Measure unit in capacitance current measurement device, resistor current measurement apparatus, power input ac current measurement device and
Ac voltage measurement device；The tunable capacitor loading section forms by way of more electric capacity are in parallel, the adjustable resistance
Loading section is formed by way of more resistor coupled in parallel.The power input includes A phases/single-phase L inputs, B phases input,
C phases input to be inputted with N phases, the tested three phase mains live wire in A phases, B phases and the corresponding three phase modes of C, the corresponding tested power supplys of N
Zero line.The power input includes 2 groups of switching values, wherein 1 group of switch is ON switch, it is adjacent with input port, for A
Phase/single-phase L inputs, B phases input and independently connect control with what C phases inputted；Another group of switch is that single-phase/three-phase function switch is opened
Close, for controlling adjustable nonlinear load to switch single-phase between two kinds of mode of operations of three-phase.It is described in single-phase and three-phase
Switch between two kinds of mode of operations and refer to：When the single-phase/three-phase function switch switch connection, loaded work piece in single-phase mode,
Switch bypasses B phases, C commutating phases bridge, adjustable nonlinear load by the input of A phases/single-phase L and N phases input as live wire with
The input of zero line, AC power are supplied to electric capacity, ohmic load after A phases/single-phase rectification bridge, now the electricity of A, B, C three-phase
Appearance load, ohmic load could act as load unit and be supplied to single phase poaer supply to use, on the basis of standard topology requirement is met
The resource in load is utilized to a greater extent；When the single-phase/three-phase function switch switches off, loaded work piece is in three-phase mould
Formula, now by-pass switch disconnection, adjustable nonlinear load is by A phases/single-phase L inputs, B phases input, C phases input, N phases input
As the input of triple line and zero line, AC power by A phase, B phase, C phase power respectively by respective rectifier bridge after provide
To respective electric capacity, ohmic load, now the rectifier bridge of A, B, C three-phase and capacitive load, ohmic load are provided only to items
Power uses, it is ensured that equipment meets requirement of the standard for structural topology.The tunable capacitor loading section and adjustable resistance are born
Carry part and be operated in the direct current component behind full-wave rectification part, receive and consume the straight of in full-wave rectification part rectification module
Flow power, electric capacity and resistance constitutes RC timing circuits, can control the make-and-break time of rectification module, by different electric capacity,
Resistance is combined to adjust different rectification module working conditions, thus changes the power and power factor of nonlinear load consumption；
The grammed switch being all connected with by every capacitive load and every ohmic load is configured, and is selected specific electric capacity and resistance
Access system is loaded, so as to change the power of nonlinear load and power factor；System has the function of calculating automatically simultaneously, leads to
Input power and power factor value are crossed, the electric capacity and resistance for needing to access can be calculated automatically, and controls corresponding switch to hold
Row opens or closes work, completes automatic set.The function of adjustable nonlinear load is, to uninterrupted power source, purification
In the test of the grid equipments such as power supply, there is provided adjustable nonlinear load condition, to realize：1) nonlinear load full power bar
Under part, the measurement to being tested power-efficient, input power factor；2) under steady-state variance loading condition, to tested power supply output
The measurement of waveform, wave distortion, basic content, harmonic content；3) under the conditions of nonlinear load Spline smoothing, tested power supply is lost
Adjust the measurement of voltage.
Adjustable nonlinear load configuration system mainly include power input, full-wave rectification, tunable capacitor load, it is adjustable
7 parts such as ohmic load, voltage and current measurement unit, controller unit, user interface, status display interface.
On power input：Power input is leftmost portion in Fig. 1, defeated by A phases/single-phase L inputs, B phases
Enter, C phases input, N phases input composition, for accessing the power input of civil power or UPS in testing, mainly solve measurand point
For single-phase and two kinds of output forms of three-phase the problem of, it is ensured that test different type the adaptability of power supply：Tested in single phase poaer supply
It is middle to use wherein A phases/single-phase L inputs to input the input as live wire and zero line with N phases；Three phase mains test in using A phases/
Single-phase L inputs, B phases are inputted, C phases are inputted to input with N phases and inputted as each phase.Power input also includes 2 groups of switching values, its
In 1 group of switch close to input port, for A phases/single-phase L inputs, the connection control that B phases input, C phases input；Another group of switch
Measure for controlling adjustable nonlinear load to switch single-phase between two kinds of mode of operations of three-phase：1) when a switch is on, bear
Load works in single-phase mode, switchs B phases, the bypass of C commutating phases bridge, adjustable nonlinear load is by A phases/single-phase L inputs and N
Mutually input of the input as live wire and zero line, AC power are supplied to electric capacity, ohmic load after A phases/single-phase rectification bridge, this
When A, B, C three-phase capacitive load, ohmic load as load unit single phase poaer supply can be supplied to use, meeting standard
Topology has maximally utilised the resource in load on the basis of requiring.2) when the switches are opened, loaded work piece is in three-phase mould
Formula, now by-pass switch disconnection, adjustable nonlinear load is by A phases/single-phase L inputs, B phases input, C phases input, N phases input
As the input of triple line and zero line, AC power by A phase, B phase, C phase power respectively by respective rectifier bridge after provide
To respective electric capacity, ohmic load, now the rectifier bridge of A, B, C three-phase and capacitive load, ohmic load are only improved to items
Power uses, it is ensured that equipment meets requirement of the standard for structural topology.
Service condition is divided into 4 kinds：
A) little power single phase condition, as shown in Fig. 2 under the conditions of this, any phase input in A/B/C three-phases can be used to make
For the tested power firestreak output of power input connection of system, N phases are inputted and are connected to tested zero-power line output, simultaneously
Single-phase/three-phase function switch switch is disconnected, load is set to three-phase mode of operation.Exemplified by selecting B phases as input, it is now
The power flow direction of system is that power supply output L- loads B phases input-loaded B commutating phases circuit-load B phases electric capacity, ohmic load-load
B commutating phases circuit-load N phases input-power supply output N.
B) high-power single-phase condition, as shown in figure 3, under the conditions of this, the power using A phases/single-phase input as system is defeated
The tested power firestreak output of incoming interface connection, N phases are inputted and are connected to tested zero-power line output, are also turned on single-phase/three-phase
Function switch is switched, and load is set into single-phase mode of operation, and now the power flow direction of system is that power supply exports L- and loads A phases/mono-
Phase input-load A phases/single phase rectifier circuit-load A/B/C three phase capacitances, ohmic load-load A phases/single phase rectifier circuit-
Load N phases input-power supply output N.
C) small-power three-phase condition, as shown in figure 4, under the conditions of this, inputted using A phase, B phase, C phase, N phases and be used as system
The tested power supply A/B/C/N phases of power input connection export, and simultaneously switch off single-phase/three-phase function switch switch, load is set
For three-phase mode of operation, now it is whole to be that power supply exports-loaded A/B/C three-phase inputs-load A/B/C three-phases for the power flow direction of system
Current circuit-load A/B/C three phase capacitances, ohmic load-load A/B/C rectified three-phase circuits-load N phases input-power supply output
N。
D) high power three-phase condition, as shown in figure 5, under the conditions of this, using 3 adjustable nonlinear loads, make respectively
For the load of A, B, C three-phase, A phases/single-phase input of every nonlinear load is inputted with N phases and connect as the power input of system
The tested power supply of mouth connection mutually exports, and is also turned on single-phase/three-phase function switch switch, load is set into single-phase mode of operation, this
When system power flow direction A phases/single-phase input-load 1,2,3 for exporting-load 1,2,3 for power supply A phases/single-phase three-phase it is whole
The A/B/C three phase capacitances of current circuit-load 1,2,3, the A phases of ohmic load-load 1,2,3/single-phase rectified three-phase circuit-load
1st, 2,3 N phases input-power supply output N.
On full-wave rectification part：Full-wave rectification part is used to carry out full-wave rectification to the AC power of input, obtains straight
Power is flowed, full-wave rectification part uses national standard GB 7260.3《The method that no-break power unit (UPS) third portion determines performance
And test requirements document》The non-control rectifier system of diode of middle recommendation is completed.When selecting rectification circuit, A phases can be selected as B
Three times of phase, C phase power, so as to when switching to single-phase mode, the rectification circuit using A commutating phases circuit as whole load,
On the one hand meet standard requirement on the topology, on the one hand save the manufacturing cost of equipment.
On tunable capacitor load and adjustable resistance loading section：As shown in fig. 6, tunable capacitor load and adjustable resistance are born
Carry part and be operated in the direct current component after rectification circuit, formed by way of more electric capacity, resistor coupled in parallel, receive and consume and
The dc power of self-rectifying module, electric capacity and resistance constitute RC timing circuits, can control the make-and-break time of rectification module, no
Electric capacity together, resistance combination can adjust different rectification module working conditions, thus change the power of nonlinear load consumption
And power factor.Every electric capacity and ohmic load are respectively connected with grammed switch, can by setting, select specific electric capacity and
Ohmic load access system, so as to change the power of nonlinear load and power factor.System has the work(calculated automatically simultaneously
Can, by input power and power factor value, electric capacity, the resistance for needing to access can be calculated automatically, and opened corresponding to control
Close execution and open or close work, complete the automatic setting of equipment.
On voltage and current measurement unit：As shown in figure 1, voltage and current measurement unit is divided into 3 parts, Part I is used
Carry out the alternating voltage and electric current of test input (i.e. tested power supply output), the power and power undertaken for computational load because
Number；The voltage and the electric current by capacitive load, Part III that Part II is used in testing capacitor load are used for test resistance
Voltage in load and the electric current for passing through ohmic load.
On controller unit, user interface：Controller unit selection single-chip microcomputer, liquid crystal display, main complete paired systems are opened
Pass amount control, the correcting process of measurement amount, according to user setting automatically configure the functions such as load condition.
It is hereby stated that described above contribute to skilled artisan understands that the invention, but not limit the present invention
The protection domain of creation.It is any that equivalent substitution described above, modification are improved without departing from the invention substantive content
And/or the implementation deleted numerous conform to the principle of simplicity and carried out, each fall within the protection domain of the invention.
Claims (9)
1. adjustable nonlinear load configures system, it is characterised in that including the power input being sequentially connected, voltage electricity
Flow metering unit, full-wave rectification part, tunable capacitor loading section, adjustable resistance loading section, controller unit, and user
Boundary element；The controller unit by controlled quentity controlled variable output module connect in the tunable capacitor loading section each electric capacity and
The grammed switch of each resistance of adjustable resistance loading section, the controller unit pass through described in the connection of analog measurement module
Capacitance current measurement device, resistor current measurement apparatus, the alternating current of power input in voltage and current measurement unit
Measurement apparatus and ac voltage measurement device；The tunable capacitor loading section forms by way of more electric capacity are in parallel, institute
State adjustable resistance loading section to form by way of more resistor coupled in parallel, the power input includes at least 2 groups of switches
Amount, wherein 1 group of switch is ON switch, it is adjacent with input port, input what is inputted with C phases for A phases/single-phase L inputs, B phases
It is independent to connect control；Another 1 group of switch switchs for single-phase/three-phase function switch, for controlling adjustable nonlinear load in list
Mutually switch between two kinds of mode of operations of three-phase.
2. adjustable nonlinear load according to claim 1 configures system, it is characterised in that the power input portion
Divide and include A phases/single-phase L inputs, B phases are inputted, C phases are inputted and inputted with N phases, being tested in A phases, B phases and the corresponding three phase modes of C
Three phase mains live wire, the corresponding tested zero-power lines of N.
3. adjustable nonlinear load according to claim 1 configures system, it is characterised in that described single-phase and three
Switch between two kinds of mode of operations of phase and refer to：When the single-phase/three-phase function switch switch connection, loaded work piece is in uniphase mode
Formula, switch and input B phases, the bypass of C commutating phases bridge, adjustable nonlinear load as live wire with N phases by A phases/single-phase L inputs
With the input of zero line, AC power is supplied to electric capacity, ohmic load after A phases/single-phase rectification bridge, now A, B, C three-phase
Capacitive load, ohmic load could act as load unit and be supplied to single phase poaer supply to use, and meet the basis of standard topology requirement
On to a greater extent using load in resource；When the single-phase/three-phase function switch switches off, loaded work piece is in three-phase
Pattern, now by-pass switch disconnection, adjustable nonlinear load is by A phases/single-phase L inputs, B phases input, C phases input, N phases are defeated
Enter the input as triple line and zero line, AC power by A phase, B phase, C phase power respectively by respective rectifier bridge after carry
Respective electric capacity, ohmic load are supplied, now the rectifier bridge of A, B, C three-phase and capacitive load, ohmic load are provided only to respectively
Item power uses, it is ensured that equipment meets requirement of the standard for structural topology.
4. adjustable nonlinear load according to claim 1 configures system, it is characterised in that the tunable capacitor is born
Carry part and adjustable resistance loading section is operated in the direct current component behind full-wave rectification part, receive and consume from full-wave rectification
The dc power of rectification module in part, electric capacity and resistance constitute RC timing circuits, when can control the break-make of rectification module
Between, by different electric capacity, resistance combination to adjust different rectification module working conditions, thus change nonlinear load consumption
Power and power factor；The grammed switch being all connected with by every capacitive load and every ohmic load is configured, selection
By specific electric capacity and ohmic load access system, so as to change the power of nonlinear load and power factor；System has simultaneously
There is the function of calculating automatically, by input power and power factor value, the electric capacity and resistance for needing to access can be calculated automatically,
And grammed switch corresponding to controlling performs and opens or closes work, automatic set is completed.
5. adjustable nonlinear load according to claim 3 configures system, it is characterised in that the system is at least wrapped
Include following four working method, little power single phase mode, high-power single-phase mode, small-power three-phase mode and with other loads
Configuration system forms high power three-phase mode etc. together.
6. adjustable nonlinear load according to claim 5 configures system, it is characterised in that：Using little power single phase
When mode works, single-phase/three-phase function switch switch is disconnected, load is set to three-phase mode of operation, and ON switch selects
The tested power firestreak of power input connection using any phase input in A/B/C three-phases as system exports, and N phases is defeated
Enter to be connected to tested zero-power line output, now the power flow direction of system is that power supply exports L->It is selected load mutually input->It is selected
Load commutating phase circuit->Selected load phase electric capacity, ohmic load->Selected load commutating phase circuit->Load N phases input->Electricity
Source exports N.
7. adjustable nonlinear load according to claim 5 configures system, it is characterised in that：Using high-power single-phase
When mode works, single-phase/three-phase function switch switch is connected, load is set to single-phase mode of operation, uses A phases/single-phase input
The tested power firestreak output of power input connection as system, N phases are inputted and are connected to tested zero-power line output, this
When system power flow direction for power supply export L->Load A phases/single-phase input->Load A phases/single phase rectifier circuit->Load A/B/
C three phase capacitances, ohmic load->Load A phases/single phase rectifier circuit->Load N phases input->Power supply exports N.
8. adjustable nonlinear load according to claim 5 configures system, it is characterised in that：Using small-power three-phase
When mode works, single-phase/three-phase function switch switch is disconnected, load is set to three-phase mode of operation, uses A phase, B phase, C phase, N
Mutually input exports as the tested power supply A/B/C/N phases of power input connection of system, and now the power flow direction of system is electricity
Source output->Load A/B/C three-phase inputs->Load A/B/C rectified three-phase circuits->Load A/B/C three phase capacitances, ohmic load-
>Load A/B/C rectified three-phase circuits->Load N phases input->Power supply exports N.
9. adjustable nonlinear load according to claim 5 configures system, it is characterised in that：Using high power three-phase
When mode works, using 3 adjustable nonlinear loads, respectively as the load of A, B, C three-phase, by every nonlinear load
A phases/single-phase input and N phases input and connect tested power supply as the power input of system and mutually export, be also turned on 3 it is negative
The single-phase/three-phase function switch switch of load, single-phase mode of operation is set to by load, and now the power flow direction of system is that power supply is defeated
Go out->A phases/single-phase input of load 1,2,3->A phases/single-phase rectified three-phase circuit of load 1,2,3->The A/B/ of load 1,2,3
C three phase capacitances, ohmic load->A phases/single-phase rectified three-phase circuit of load 1,2,3->Load 1,2,3 N phases input->Power supply
Export N.
Priority Applications (1)
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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) |
| CN106405439B (en) * | 2016-10-14 | 2020-02-21 | 北京东方计量测试研究所 | Automatic measurement and calibration device and method for dynamic characteristics of uninterruptible power supply |
| 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 |
| CN107248821B (en) * | 2017-08-07 | 2023-04-18 | 重庆博昂科技有限公司 | Nonlinear load simulation device |
| CN108132368B (en) * | 2017-12-22 | 2021-02-05 | 广电计量检测（成都）有限公司 | Pure resistive load system |
| 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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