WO2015196838A1 - 一种三相不间断电源的控制方法、装置和三相不间断电源 - Google Patents

一种三相不间断电源的控制方法、装置和三相不间断电源 Download PDF

Info

Publication number
WO2015196838A1
WO2015196838A1 PCT/CN2015/075034 CN2015075034W WO2015196838A1 WO 2015196838 A1 WO2015196838 A1 WO 2015196838A1 CN 2015075034 W CN2015075034 W CN 2015075034W WO 2015196838 A1 WO2015196838 A1 WO 2015196838A1
Authority
WO
WIPO (PCT)
Prior art keywords
phase
current
axis
power supply
uninterruptible power
Prior art date
Application number
PCT/CN2015/075034
Other languages
English (en)
French (fr)
Inventor
方晓厅
梁向辉
刘永桥
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP15812564.1A priority Critical patent/EP3145070B1/en
Publication of WO2015196838A1 publication Critical patent/WO2015196838A1/zh
Priority to US15/386,196 priority patent/US10348127B2/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H02J9/063—Common neutral, e.g. AC input neutral line connected to AC output neutral line and DC middle point
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks

Definitions

  • the invention relates to the technical field of power electronics, and in particular to a method and a device for controlling a three-phase uninterruptible power supply and a three-phase uninterruptible power supply.
  • Inverter power systems are widely used in a variety of applications requiring reliable power supply.
  • inverters or uninterruptible power supplies are used to supply power to critical AC loads.
  • Typical inverter power systems such as Figure 1 shows.
  • the inverter power supply usually has three power ports: DC (battery) input port, AC input port and AC output port, corresponding to three power converters, respectively: DC/DC boost converter that raises the battery low voltage to DC high voltage bus.
  • An AC/DC Power Factor Correction (PFC) converter that converts the commercial AC into a DC high voltage bus and completes the input power factor correction, and a DC/AC inverter that converts the DC high voltage into an AC AC output.
  • PFC Power Factor Correction
  • the input of the three-phase UPS is generally three-phase four-wire system + ground line, that is, A-phase line, B-phase line, C-phase line, neutral line and ground line.
  • the three-phase UPS cannot receive the signal on the zero line of the AC power grid
  • the neutral line is lost, the three-phase UPS needs to be able to detect the loss of the neutral line and switch to the new control method to ensure that the three-phase UPS can work normally.
  • the zero ground voltage that is, the voltage difference between the ground line and the neutral line will be large.
  • This voltage directly acts on the load, which may damage the load; After that, because the midpoint potential of the positive and negative busbars of the three-phase UPS is uncertain, this is likely to cause the busbar to be biased, that is, the absolute values of the voltages on the positive and negative busbars are large, causing the voltage on one of the busbars to be too low. This leads to shutdown, which can seriously affect the reliability and range of use of the three-phase UPS.
  • the reference current i 0 * of the 0-axis in the dq0 coordinate system is usually set to 0, and then the zero-axis current is sampled.
  • i 0 (i a +i b +i c )/3
  • i a is the current of phase A of the three-phase alternating current received by the three-phase UPS
  • i b is the three-phase alternating current received by the three-phase UPS
  • the current of phase B, i c is the current of phase C of the three-phase alternating current received by the three-phase UPS)
  • the proportional integral is adjusted to generate a 0-axis DC modulated wave.
  • the amplitude of the 0-axis DC modulated wave is proportional to the zero ground voltage. Therefore, limiting the amplitude of the 0-axis DC modulated wave can control the zero ground voltage to a certain value. In the range.
  • the 0-axis DC modulation wave is equivalent to the junction point of the cross-bridge and the vertical bridge of the rectifier.
  • a DC voltage is applied to it, which causes the current flowing through the cross bridge during the positive half cycle of the alternating current to be unequal to the current flowing through the cross bridge during the negative half cycle of the alternating current, resulting in the absolute value of the voltage on the positive and negative bus bars.
  • Unequal eventually the voltage on one of the busbars may be too low and cause a shutdown.
  • the 0-axis DC modulated wave will cause the absolute values of the voltages on the positive and negative buses to vary. This may cause the bus voltage to be too low and cause the three-phase UPS to shut down.
  • Embodiments of the present invention provide a three-phase UPS control method and apparatus, and a three-phase uninterruptible power supply, which are used to solve the problem that the current control method is applied to a three-phase UPS using a three-level topology after the zero line is lost.
  • a 0-axis DC modulated wave can cause problems with positive and negative busbar imbalance.
  • a method for controlling a three-phase UPS including:
  • the alternating current whose frequency is the harmonic of the mains is taken as the 0-axis reference current
  • the zero-axis sampling current is one-third of the sum of the phase A current, the phase B current, and the phase C current in the three-phase alternating current received by the three-phase uninterruptible power supply.
  • the 0-axis modulated wave is generated according to the difference between the reference current of the 0-axis and the sampling current of the 0-axis, which specifically includes:
  • the difference between the 0-axis reference current and the 0-axis sampling current is proportionally adjusted so that the 0-axis current is closed-loop, and the A-phase modulated wave, the B-phase modulated wave, and the C are normal when the three-phase uninterruptible power supply neutral line is normal.
  • the position of the peak of each phase modulated wave in the phase modulated wave is the same as the valley position of the 0-axis reference current, and the position of the valley of the phase modulated wave is the same as the peak position of the reference current of the 0 axis;
  • the frequency of the reference current of the 0-axis is the 3N harmonic of the commercial power, and N is a natural number;
  • the voltage of the 0-axis modulated wave is equal to one-third of the sum of the voltage of the A-phase modulated wave, the voltage of the B-phase modulated wave, and the voltage of the C-phase modulated wave.
  • determining that the three-phase uninterruptible power supply is lost specifically includes:
  • the neutral line of the three-phase uninterruptible power supply is determined to be lost.
  • the method further includes:
  • the signal obtained by proportionally integrating the difference between the bus difference reference voltage and the actual bus difference is used as the 0-axis reference current; the bus difference reference voltage is zero.
  • determining that the three-phase uninterruptible power supply zero line returns to normal specifically includes:
  • a control device for a three-phase UPS including:
  • a determining module configured to determine that the three-phase uninterruptible power supply is lost
  • a setting module for using an alternating current having a frequency of a mains harmonic as a zero-axis reference current
  • Generating a module generating a 0-axis modulated wave according to a difference between the 0-axis reference current and the 0-axis sampling current, to control a rectifier in the three-phase uninterruptible power supply to convert the received alternating current into direct current; wherein, at the same time, The zero-axis sampling current is one-third of the sum of the phase A current, the phase B current, and the phase C current in the three-phase alternating current received by the three-phase uninterruptible power supply.
  • the generating module is specifically configured to:
  • the difference between the 0-axis reference current and the 0-axis sampling current is proportionally adjusted so that the 0-axis current is closed-loop, and the A-phase modulated wave, the B-phase modulated wave, and the C are normal when the three-phase uninterruptible power supply neutral line is normal.
  • the position of the peak of each phase modulated wave in the phase modulated wave is the same as the valley position of the 0-axis reference current, and the position of the valley of the phase modulated wave is the same as the peak position of the reference current of the 0 axis;
  • the frequency of the reference current of the 0-axis is the 3Nth harmonic of the commercial power, and N is a natural number; the difference between the sampling voltage of the 0-axis and the signal output by the proportional adjustment is limited to obtain a 0-axis modulated wave;
  • the voltage of the 0-axis modulated wave is equal to one-third of the sum of the voltage of the A-phase modulated wave, the voltage of the B-phase modulated wave, and the voltage of the C-phase modulated wave.
  • the determining module is specifically configured to:
  • the determining module is further configured to: determine that the three-phase uninterruptible power supply neutral line returns to normal;
  • the setting module is further configured to use a signal obtained by proportionally integrating the difference between the bus difference reference voltage and the actual bus difference as the 0-axis reference current; the bus difference reference voltage is zero.
  • the determining module is specifically configured to:
  • a three-phase UPS comprising:
  • a rectifier control unit configured to determine a zero line loss of the three-phase uninterruptible power supply; use an alternating current whose frequency is a harmonic of the mains as a zero-axis reference current; and generate a difference between the zero-axis reference current and the zero-axis sampling current a 0-axis modulated wave to control a rectifier in the three-phase uninterruptible power supply to convert the received alternating current into direct current; wherein, at the same time, the zero-axis sampling current is a three-phase received by the three-phase uninterruptible power supply One-third of the sum of the current of the phase A, the current of the phase B, and the current of the phase C in the alternating current;
  • a rectifier for converting the received three-phase alternating current into a direct current output under the control of the rectifier control unit
  • the rectifier control unit is specifically configured to:
  • N is a natural number
  • Proportional adjustment so that the 0-axis current is closed-loop, and the position of the peak of each phase modulated wave in the A-phase modulated wave, the B-phase modulated wave, and the C-phase modulated wave when the neutral line of the three-phase uninterruptible power supply is normal is
  • the valley position of the 0-axis reference current is the same, and the position of the valley of the phase modulated wave is the same as the peak position of the reference current of the 0-axis; and the difference between the sampled voltage of the 0-axis and the signal output after the proportional adjustment is performed.
  • the 0-axis sampling current is the sum of the A-phase current, the B-phase current, and the C-phase current in the three-phase alternating current received by the three-phase uninterruptible power supply
  • the voltage of the 0-axis modulated wave is equal to one-third of the sum of the voltage of the A-phase modulated wave, the voltage of the B-phase modulated wave, and the voltage of the C-phase modulated wave.
  • the rectifier control unit is specific Used for:
  • the rectifier control unit is further configured to:
  • the rectifier control unit is specifically configured to:
  • the control method, device and three-phase UPS of the three-phase UPS provided by the embodiments of the present invention as the zero line is lost, the alternating current with the frequency of the mains is taken as the 0-axis reference current, and then according to the 0-axis reference current.
  • the difference between the 0-axis sampling current and the 0-axis sampling current is generated to control the rectifier in the three-phase uninterruptible power supply to convert the received alternating current into direct current; since the 0-axis reference current and the 0-axis sampling current are both AC, therefore, according to 0
  • the 0-axis modulated wave generated by the difference between the axis reference current and the 0-axis sampling current is also AC, which is equivalent to applying an AC voltage at the junction of the cross-bridge and the vertical bridge of the rectifier, since the AC voltage is a harmonic of the mains. Wave, therefore, in a cycle of utility power, the exchange The average value of the voltage is 0.
  • the current flowing through the cross bridge during the positive half cycle of the alternating current is equal to the current flowing through the cross bridge during the negative half cycle of the alternating current, and the positive and negative bus bars in the three-phase UPS are balanced. Overcome the problem of imbalance between positive and negative busbars.
  • FIG. 1 is a schematic structural view of an inverter power supply system in the prior art
  • FIG. 2 is a schematic structural diagram of an uninterruptible power supply system according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a method for controlling a three-phase uninterruptible power supply according to an embodiment of the present invention
  • FIG. 4 is a second flowchart of a method for controlling a three-phase uninterruptible power supply according to an embodiment of the present invention
  • FIG. 5 is a third flowchart of a method for controlling a three-phase uninterruptible power supply according to an embodiment of the present invention
  • FIG. 6 is a fourth flowchart of a method for controlling a three-phase uninterruptible power supply according to an embodiment of the present invention.
  • FIG. 7 is a fifth flowchart of a method for controlling a three-phase uninterruptible power supply according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of control logic when a control method of a three-phase uninterruptible power supply is applied in an actual embodiment according to an embodiment of the present invention
  • FIG. 9 is a structural diagram of a control device for a three-phase uninterruptible power supply according to an embodiment of the present invention.
  • the control method, device and uninterruptible power supply of the three-phase UPS provided by the embodiments of the present invention, after the zero line is lost, sets the 0-axis reference current to the alternating current whose frequency is the harmonic of the mains, and then according to the 0-axis reference current.
  • the difference between the sampling current and the 0-axis sampling current generates a 0-axis modulated wave; since the 0-axis reference current and the 0-axis sampling current are both AC, the 0-axis modulated wave generated based on the difference between the 0-axis reference current and the 0-axis sampling current is also AC.
  • the current flowing through the cross bridge during the positive half cycle of the alternating current is equal to the current flowing through the cross bridge during the negative half cycle of the alternating current, and the positive and negative bus bars in the three-phase UPS are balanced, which overcomes the positive and negative bus bars.
  • the problem of imbalance is the case of imbalance.
  • the control method of the three-phase UPS provided by the embodiment of the present invention is applied to the UPS system shown in FIG.
  • the rectifier 21, the inverter 22, the bus capacitor C1, the bus capacitor C2, and the rectifier inductor L constitute a UPS.
  • the rectifier control unit 24 generates a modulated wave based on the current signal of the rectified inductor L, the input voltage (i.e., the voltage of the received AC mains), and the positive and negative bus voltages, and then controls the operation of the rectifier 21 based on the generated modulated wave generating control signal.
  • a load 23 is also included in FIG.
  • the three-phase UPS includes three rectifying inductors and three rectifiers, and the three-phase alternating current is input to different rectifiers through different rectifying inductors.
  • a method for controlling a three-phase UPS according to an embodiment of the present invention, as shown in FIG. 3, includes:
  • the zero-axis sampling current i 0 is the current I a of the phase A in the three-phase alternating current received by the three-phase UPS (ie, the current on the rectifier inductor connected to the rectifier that rectifies the phase A alternating current in the three-phase UPS) ), phase B current i b (ie, the current on the rectifying inductor connected to the rectifier that rectifies the phase B alternating current in the three-phase UPS) and phase C current i c (ie, rectifying the phase C alternating current in the three-phase UPS)
  • phase i 0 (i a + i b + i c ) / 3.
  • the zero line loss is the disconnection of the neutral line between the AC grid and point p in Figure 2.
  • the above 0 axis may be the 0 axis in the rotating coordinate system ⁇ 0 or the 0 axis in the rotating coordinate system dq0. If the above 0 axis is the 0 axis in the rotating coordinate system ⁇ 0, then after generating the 0-axis modulated wave, the ⁇ -axis modulated wave, the ⁇ -axis modulated wave, and the generated 0-axis modulated wave are coordinate-converted to generate A-phase modulation. Wave, B-phase modulated wave, and C-phase modulated wave.
  • the d-axis modulated wave, the q-axis modulated wave, and the generated 0-axis modulated wave are coordinate-converted to generate A-phase modulation.
  • Wave, B-phase modulated wave, and C-phase modulated wave are coordinate-converted to generate A-phase modulation.
  • the voltage 0 axis of the modulated wave U 0 (U sA + U sB + U sC) / 3, U sA of A-phase modulation voltage wave, U sB is B-phase modulation voltage wave, U sC is C-phase modulated The voltage of the wave.
  • the phase A modulated wave controls the three-phase UPS to receive the A-phase alternating current to convert the received alternating current into direct current
  • the B-phase modulated wave controls the three-phase UPS to receive the B-phase alternating current to convert the received alternating current into direct current
  • the C-phase modulated wave controls the rectifier that receives the C-phase alternating current in the three-phase UPS to convert the received alternating current into direct current.
  • the rectifier in the three-phase UPS may adopt a two-level topology, a three-level topology, or other topologies.
  • the 0-axis modulated wave is generated according to the difference between the 0-axis reference current and the 0-axis sampling current, and specifically includes:
  • a position of a peak of each phase modulated wave in the C-phase modulated wave is the same as a valley position of the 0-axis reference current, and a position of a valley of the phase modulated wave is the same as a peak position of the 0-axis reference current;
  • the frequency of the 0-axis reference current is the 3N harmonic of the mains, and N is a natural number;
  • the frequency of the 0-axis reference current is the 3N harmonic of the mains
  • the phase of the 0-axis reference current by adjusting the phase of the 0-axis reference current, the amplitude of the 0-axis reference current, and the proportional adjustment of the difference between the 0-axis reference current and the 0-axis sampling current
  • the ratio of the 0-axis current can be closed, that is, the 0-axis current forms a negative feedback, and the A-phase modulated wave, the B-phase modulated wave, and the C-phase modulated wave are normal when the zero-phase uninterruptible power supply zero line is normal.
  • the position of the peak of each phase modulated wave is the same as the valley position of the reference current of the 0 axis, and the position of the valley of the phase modulated wave is the same as the peak position of the reference current of the 0 axis, so that the 0 axis is superimposed
  • the peaks of the modulated waves of each phase of the A-phase modulated wave, the B-phase modulated wave, and the C-phase modulated wave obtained after the reference current are lowered, and the trough is raised to avoid the peak of the modulated wave being higher than the peak of the carrier, and the trough of the modulated wave is low.
  • the trough of the carrier is the trough of the carrier.
  • determining that the three-phase UPS zero line is lost specifically includes:
  • the average value of the voltage of the phase A alternating current in the three-phase alternating current received by the three-phase UPS, and U a is the instantaneous value of the voltage of the phase A alternating current in the three-phase alternating current received by the three-phase UPS;
  • the average value of the voltage of the B-phase alternating current in the three-phase alternating current received by the three-phase UPS, and U b is the instantaneous value of the voltage of the phase B alternating current in the three-phase alternating current received by the three-phase UPS;
  • the method for controlling a three-phase UPS provided by the embodiment of the present invention further includes:
  • V busP is the voltage on the positive bus capacitor
  • V busN is the voltage on the negative bus capacitor
  • I N_REC is the instantaneous value of the current on the neutral line in the three-phase alternating current received by the three-phase UPS
  • I N_REC I LA +I LB +I LC
  • I LA is the pair A in the three-phase UPS the instantaneous value of the rectified inductor current phase rectifier for rectifying alternating current connected
  • I LB of the three-phase UPS of the B-phase alternating current is rectified in the rectification of the rectifier connected to the inductor of the instantaneous value of the three I LC
  • FIG. 8 is an example of controlling the rectifier in the three-phase UPS in the dq0 coordinate system as an example.
  • the bus voltage control is implemented on the d-axis of the dq0 coordinate system, including proportionally adjusting the difference between the bus reference voltage and the bus voltage to control the bus voltage, and the difference between the d-axis reference current and the d-axis sampling current after the proportional adjustment is output.
  • Proportional integration is performed to determine the d-axis modulated wave based on the d-axis sampled voltage and the signal output after proportional integration.
  • the reactive current control is implemented in the q-axis of the dq0 coordinate system, and the purpose is to compensate the influence of the rectifying and filtering capacitor on the power factor of the grid, so that the power factor is close to 1, including according to the trimming amount on the q-axis, i cq and q-axis.
  • the steady-state control of the busbar difference is realized on the 0-axis.
  • the positive and negative busbars can be balanced; when the neutralline is not lost, the actual busbar difference and the busbar difference reference voltage are The difference is proportionally integrated, and the signal output after proportional integration is used as the 0-axis reference current, and the difference between the 0-axis reference current and the 0-axis sampling current is proportionally adjusted, and the difference between the 0-axis sampling voltage and the proportional-modulated output signal is limited.
  • the amplitude of the 0-axis modulated wave is obtained.
  • the harmonic generator When the neutral line is lost, the harmonic generator generates a 0-axis reference current according to the modulo value of the given 0-axis reference current and the phase of the phase-locked loop output, and then the 0-axis reference current and The difference between the 0-axis sampling currents is proportionally adjusted, and the difference between the 0-axis sampling voltage and the signal after the proportional adjustment is limited to obtain a 0-axis modulated wave.
  • the d-axis modulated wave, the q-axis modulated wave, and the 0-axis modulated wave are subjected to the coordinate transformation of the dq0 rotating coordinate system to the stationary coordinate system to obtain the A-phase modulated wave, the B-phase modulated wave, and the C-phase modulated wave, and the A-phase modulated wave
  • the B-phase modulated wave and the C-phase modulated wave are pulse-width modulated to obtain the control signal of the rectifier that receives the A-phase alternating current in the three-phase UPS, the control signal of the rectifier that receives the B-phase alternating current in the three-phase UPS, and the receiving C in the three-phase UPS.
  • the control signal of the alternating current rectifier is subjected to the coordinate transformation of the dq0 rotating coordinate system to the stationary coordinate system to obtain the A-phase modulated wave, the B-phase modulated wave, and the C-phase modulated wave, and the A-phase modulated wave
  • the d-axis sampling current, the q-axis sampling current, and the zero-axis sampling current are currents on the rectifying inductor connected to the rectifier that rectifies the phase A alternating current in the three-phase UPS (phase A input current), and phase B in the three-phase UPS
  • the current on the rectifying inductor connected to the rectifier rectified by the alternating current (phase B input current) and the current on the rectifying inductor connected to the rectifier rectifying the C phase alternating current in the three-phase UPS (C phase input current) pass through the stationary coordinate system to dq0
  • the converted d-axis sampling voltage, q-axis sampling voltage and 0-axis sampling voltage are the A-phase input voltage received by the three-phase UPS, the B-phase input voltage received by the three-phase UPS, and the three-phase UPS receiving.
  • the incoming C-phase input voltage is obtained by transforming the stationary coordinate system into the dq0 rotating coordinate system.
  • the angle involved in the transformation from the stationary coordinate system to the dq0 rotating coordinate system or the transformation from the dq0 rotating coordinate system to the stationary coordinate system is the angle between the rotor direct axis and the A-phase input voltage, which is determined by the phase-locked loop.
  • the phase A input voltage, the phase B input voltage, and the phase C input voltage received by the three-phase UPS are obtained, and the phase locked loop also gives the phase of the zero-axis reference current.
  • the embodiment of the present invention further provides a three-phase UPS control device and a three-phase UPS.
  • the principle of the problem solved by the device and the three-phase UPS is similar to that of the foregoing three-phase UPS, so the device is similar.
  • the implementation of the three-phase UPS can be seen in the implementation of the aforementioned method, repeating I won't go into details here.
  • the control device of the three-phase UPS provided by the embodiment of the present invention, as shown in FIG. 9, includes:
  • a determining module 91 configured to determine that the three-phase uninterruptible power supply zero line is lost
  • a setting module 92 configured to use an alternating current whose frequency is a harmonic of the main power as a zero-axis reference current
  • the generating module 93 generates a 0-axis modulated wave according to the difference between the 0-axis reference current and the 0-axis sampling current, so as to control the rectifier in the three-phase uninterruptible power supply to convert the received alternating current into direct current; wherein, at the same time, The zero-axis sampling current is one-third of the sum of the phase A current, the phase B current, and the phase C current of the three-phase alternating current received by the three-phase uninterruptible power supply.
  • the generating module 93 is specifically configured to perform a proportional adjustment between the 0-axis reference current and the 0-axis sampling current, so that the 0-axis current is closed, and the zero-phase uninterruptible power supply is normal.
  • the position of the peak of each phase modulated wave of the A phase modulated wave, the B phase modulated wave, and the C phase modulated wave is the same as the valley position of the 0-axis reference current, and the position of the valley of the phase modulated wave is 0
  • the reference current of the axis has the same peak position; the frequency of the reference current of the 0 axis is the 3Nth harmonic of the commercial power, and N is a natural number; the difference between the 0-axis sampling voltage and the signal of the proportionally adjusted output is limited.
  • a 0-axis modulated wave is obtained; wherein, at the same time, the voltage of the 0-axis modulated wave is equal to one-third of the sum of the voltage of the A-phase modulated wave, the voltage of the B-phase modulated wave, and the voltage of the C-phase modulated wave.
  • the determining module 91 is specifically configured to: determine an absolute value of an average value of voltages of each phase in the three-phase alternating current received by the three-phase uninterruptible power supply; and voltages of each phase in the three-phase alternating current When the minimum value of the absolute values of the average values is greater than the first threshold, it is determined that the three-phase uninterruptible power supply zero line is lost.
  • the determining module 91 is further configured to: determine that the three-phase uninterruptible power supply neutral line returns to normal; the setting module 92 is further configured to: use the signal obtained by proportionally integrating the difference between the bus difference reference voltage and the actual bus difference as a The 0-axis reference current is described; the bus-line difference reference voltage is zero.
  • the determining module 91 is specifically configured to determine an effective value of a current on a zero line of the three-phase alternating current received by the three-phase uninterruptible power supply; and a zero line in the received three-phase alternating current When the effective value of the current is greater than the second threshold, it is determined that the zero-phase uninterruptible power supply neutral line returns to normal.
  • the three-phase uninterruptible power supply provided by the embodiment of the present invention, as shown in FIG. 2, includes:
  • a rectifier control unit 24 configured to determine that the three-phase uninterruptible power supply zero line is lost; the alternating current whose frequency is the harmonic of the mains is used as the zero-axis reference current; according to the difference between the zero-axis reference current and the zero-axis sampling current Generating a 0-axis modulated wave to control a rectifier in the three-phase uninterruptible power supply to convert the received alternating current into direct current; wherein, at the same time, the zero-axis sampling current is the three received by the three-phase uninterruptible power supply One-third of the sum of the current of the phase A, the current of the phase B, and the current of the phase C in the alternating current;
  • a rectifier 21 configured to convert the received three-phase alternating current into a direct current output under the control of the rectifier control unit 24;
  • the inverter 22 is configured to convert the direct current output from the rectifier 21 into alternating current.
  • the rectifier control unit 24 is specifically configured to determine that the three-phase uninterruptible power supply zero line is lost; use an alternating current of a 3N harmonic of a commercial power as the 0-axis reference current, where N is a natural number; The difference between the 0-axis reference current and the 0-axis sampling current is proportionally adjusted so that the 0-axis current is closed, and the A-phase modulated wave, the B-phase modulated wave, and the C-phase are normal when the three-phase uninterruptible power supply zero line is normal.
  • the position of the peak of each phase modulated wave in the modulated wave is the same as the valley position of the 0-axis reference current, and the position of the valley of the phase modulated wave is the same as the peak position of the reference current of the 0 axis;
  • the difference between the sampling voltage and the signal outputted by the proportional adjustment is limited to obtain a 0-axis modulated wave; wherein the 0-axis sampling current is the phase A of the three-phase alternating current received by the three-phase uninterruptible power supply
  • the voltage of the 0-axis modulated wave is equal to the voltage of the A-phase modulated wave, the voltage of the B-phase modulated wave, and the voltage of the C-phase modulated wave. And one third.
  • the rectifier control unit 24 is specifically configured to determine an absolute value of an average value of voltages of the phases of the three-phase alternating current received by the three-phase uninterruptible power supply; and phases of the three-phase alternating current When the minimum value of the absolute values of the average values of the voltages is greater than the first threshold value, determining that the three-phase uninterruptible power supply neutral line is lost; using an alternating current whose frequency is a harmonic of the mains as the 0-axis reference current; Deriving a difference between the 0-axis reference current and the 0-axis sampling current to generate a 0-axis modulated wave to control a rectifier in the three-phase uninterruptible power supply to convert the received alternating current into direct current; wherein the 0-axis sampling current is Phase A current, Phase B of three-phase AC received by a three-phase uninterruptible power supply One third of the sum of the current and the phase C current.
  • the rectifier control unit 24 is further configured to: determine that the three-phase uninterruptible power supply neutral line returns to normal; and use a signal obtained by proportionally integrating the difference between the bus difference reference voltage and the actual bus difference as the 0-axis reference current; The bus difference reference voltage is zero.
  • the rectifier control unit 24 is specifically configured to determine an effective value of a current on a zero line of the three-phase alternating current received by the three-phase uninterruptible power supply; and a neutral line in the received three-phase alternating current
  • the effective value of the current is greater than the second threshold, it is determined that the three-phase uninterruptible power supply neutral line returns to normal; the signal obtained by proportionally integrating the difference between the bus difference reference voltage and the actual bus difference is used as the 0-axis reference current.
  • the embodiments of the present invention may be implemented by hardware, or may be implemented by means of software plus a necessary general hardware platform.
  • the technical solution of the embodiment of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.).
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.
  • modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or the corresponding changes may be located in one or more apparatuses different from the embodiment.
  • the modules of the above embodiments may be combined into one module, or may be further split into multiple sub-modules.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Inverter Devices (AREA)
  • Rectifiers (AREA)

Abstract

一种三相UPS的控制方法、装置和三相不间断电源，用以解决在零线丢失后，目前的控制方法应用在采用三电平拓扑结构的三相UPS中时0轴的直流调制波会导致正、负母线不平衡的问题。该方法包括：确定所述三相不间断电源零线丢失；将频率为市电的谐波的交流电流作为0轴参考电流；根据所述0轴参考电流和0轴采样电流之差生成0轴调制波，以控制所述三相不间断电源中的整流器（21）将接收到的交流电转换为直流电；其中，同一时刻，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一。

Description

一种三相不间断电源的控制方法、装置和三相不间断电源
本申请要求在2014年6月27日提交中国专利局、申请号为201410305779.8、发明名称为“一种三相不间断电源的控制方法、装置和三相不间断电源”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及电力电子技术领域，尤其涉及一种三相不间断电源的控制方法、装置和三相不间断电源。
背景技术
逆变电源系统广泛应用于各种要求可靠供电的场合，如在通信领域，通常采用逆变器或不间断电源(UPS，Uninterruptible Power Supply)等给关键交流负载供电，典型的逆变电源系统如图1所示。逆变电源通常具备3个功率端口：直流(电池)输入口、交流输入口和交流输出口，对应3个功率变换器，分别为：将电池低压升为直流高压母线的DC/DC升压变换器、将市电AC转换成直流高压母线并完成输入功率因数校正的AC/DC功率因数校正(PFC，Power Factor Correction)变换器、将直流高压转换成交流AC输出的DC/AC逆变器，直流母线上并有容量较大的滤波电容。
三相UPS的输入一般是三相四线制+地线，即A相线、B相线、C相线、零线和地线，当三相UPS无法接收到交流电网的零线上的信号、即零线丢失时，三相UPS需要能够检测出零线丢失，并且切换到新的控制方法，以保证三相UPS能够正常满载工作。在零线丢失后，如果不采取措施，那么零地电压、即地线和零线之间的电压差会很大，这个电压直接作用在负载上，有可能会损坏负载；另外在零线丢失后，由于三相UPS的正负母线中点电位不定，这很可能会导致母线拉偏，即正、负母线上的电压的绝对值相差较大，从而造成其中的一条母线上的电压过低而导致关机，这会严重影响三相UPS的可靠性和使用范围。
目前，当三相UPS中的PFC整流器为两电平拓扑结构时，在零线丢失后，通常将dq0坐标系中的0轴的参考电流i0 *设为0，然后通过采样0轴电流i0(i0＝(ia+ib+ic)/3),ia为三相UPS接收到的三相交流电的A相的电流，ib为三相UPS接收到的三相交流电的B相的电流，ic为三相UPS接收到的三相交流电的C相的电流)，得到0轴电流偏差Δi0＝i0-i0 *，将得到的0轴电流偏差Δi0经过PI、即比例积分调节从而产生0轴直流调制波，该0轴直流调制波的幅值与零地电压成正比，因此，限制该0轴直流调制波的幅值就可以将零地电压控制在一定的范围内。
但是，如果三相UPS中的PFC整流器为三电平拓扑结构时，在零线丢失后，如果采用目前的控制方法，0轴的直流调制波相当于在整流器的横桥与竖桥的连接点上施加了一个直流电压，这会导致在交流电正半周期时流过横桥的电流和交流电的负半周期时流过横桥的电流不相等，从而导致正、负母线上的电压的绝对值不等，最终可能使得其中的一条母线上的电压过低而导致关机。
综上所述，在零线丢失后，目前的控制方法应用于采用三电平拓扑结构的三相UPS中时，0轴的直流调制波会导致正、负母线上的电压的绝对值不等，这可能会造成母线电压过低而使得三相UPS关机。
发明内容
本发明实施例提供了一种三相UPS的控制方法、装置和三相不间断电源，用以解决在零线丢失后，目前的控制方法应用在采用三电平拓扑结构的三相UPS中时0轴的直流调制波会导致正、负母线不平衡的问题。
第一方面，提供的一种三相UPS的控制方法，包括：
确定所述三相不间断电源零线丢失；
将频率为市电的谐波的交流电流作为0轴参考电流；
根据所述0轴参考电流和0轴采样电流之差生成0轴调制波，以控制所述三相不间断电源中的整流器将接收到的交流电转换为直流电；
其中，同一时刻，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一。
结合第一方面，在第一种可能的实现方式中，根据所述0轴的参考电流和0轴的采样电流之差生成0轴调制波，具体包括：
将所述0轴参考电流和0轴采样电流之差进行比例调节，以使得0轴电流闭环，并使得所述三相不间断电源零线正常时的A相调制波、B相调制波和C相调制波中的每一相调制波的波峰的位置与所述0轴参考电流的波谷位置相同，且该相调制波的波谷的位置与所述0轴的参考电流的波峰位置相同；所述0轴的参考电流的频率为市电的3N次谐波，N为自然数；
对0轴采样电压与所述比例调节后输出的信号的差进行限幅，得到0轴调制波；
其中，同一时刻，0轴调制波的电压等于A相调制波的电压、B相调制波的电压和C相调制波的电压之和的三分之一。
结合第一方面，在第二种可能的实现方式中，确定所述三相不间断电源零线丢失，具体包括:
确定所述三相不间断电源接收到的三相交流电中的各相的电压的平均值的绝对值；
在所述三相交流电中的各相的电压的平均值的绝对值中的最小值大于第一阈值时，确定所述三相不间断电源零线丢失。
结合第一方面，在第三种可能的实现方式中，所述方法还包括：
确定所述三相不间断电源零线恢复正常；
将母线差参考电压与实际母线差之差经过比例积分后的信号作为所述0轴参考电流；所述母线差参考电压为零。
结合第一方面的第三种可能的实现方式，在第四种可能的实现方式中，确定所述三相不间断电源零线恢复正常，具体包括：
确定所述三相不间断电源接收到的三相交流电中的零线上的电流的有效值；
在所述接收到的三相交流电中的零线上的电流的有效值大于第二阈值时，确定所述三相不间断电源零线恢复正常。
第二方面，提供的一种三相UPS的控制装置，包括：
确定模块，用于确定所述三相不间断电源零线丢失；
设置模块，用于将频率为市电的谐波的交流电流作为0轴参考电流；
生成模块，根据所述0轴参考电流和0轴采样电流之差生成0轴调制波，以控制所述三相不间断电源中的整流器将接收到的交流电转换为直流电；其中，同一时刻，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一。
结合第二方面，在第一种可能的实现方式中，所述生成模块具体用于：
将所述0轴参考电流和0轴采样电流之差进行比例调节，以使得0轴电流闭环，并使得所述三相不间断电源零线正常时的A相调制波、B相调制波和C相调制波中的每一相调制波的波峰的位置与所述0轴参考电流的波谷位置相同，且该相调制波的波谷的位置与所述0轴的参考电流的波峰位置相同；所述0轴的参考电流的频率为市电的3N次谐波，N为自然数；对0轴采样电压与所述比例调节后输出的信号的差进行限幅，得到0轴调制波；其中，同一时刻，0轴调制波的电压等于A相调制波的电压、B相调制波的电压和C相调制波的电压之和的三分之一。
结合第二方面，在第二种可能的实现方式中，所述确定模块具体用于：
确定所述三相不间断电源接收到的三相交流电中的各相的电压的平均值的绝对值；在所述三相交流电中的各相的电压的平均值的绝对值中的最小值大于第一阈值时，确定所述三相不间断电源零线丢失。
结合第二方面，在第三种可能的实现方式中，所述确定模块还用于，确定所述三相不间断电源零线恢复正常；
所述设置模块还用于，将母线差参考电压与实际母线差之差经过比例积分后的信号作为所述0轴参考电流；所述母线差参考电压为零。
结合第二方面的第三种可能的实现方式，在第四种可能的实现方式中， 所述确定模块具体用于：
确定所述三相不间断电源接收到的三相交流电中的零线上的电流的有效值；在所述接收到的三相交流电中的零线上的电流的有效值大于第二阈值时，确定所述三相不间断电源零线恢复正常。
第三方面，提供一种三相UPS，包括：
整流器控制单元，用于确定所述三相不间断电源零线丢失；将频率为市电的谐波的交流电流作为0轴参考电流；根据所述0轴参考电流和0轴采样电流之差生成0轴调制波，以控制所述三相不间断电源中的整流器将接收到的交流电转换为直流电；其中，同一时刻，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一；
整流器，用于在所述整流器控制单元的控制下将接收到的三相交流电转换为直流电输出；
逆变器，用于将所述整流器输出的直流电转换为交流电。
结合第三方面，在第一种可能的实现方式中，所述整流器控制单元具体用于：
确定所述三相不间断电源零线丢失；将频率为市电的谐波的交流电流作为所述0轴参考电流，N为自然数；将所述0轴参考电流和0轴采样电流之差进行比例调节，以使得0轴电流闭环，并使得所述三相不间断电源零线正常时的A相调制波、B相调制波和C相调制波中的每一相调制波的波峰的位置与所述0轴参考电流的波谷位置相同，且该相调制波的波谷的位置与所述0轴的参考电流的波峰位置相同；对0轴采样电压与所述比例调节后输出的信号的差进行限幅，得到0轴调制波；其中，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一；同一时刻，0轴调制波的电压等于A相调制波的电压、B相调制波的电压和C相调制波的电压之和的三分之一。
结合第三方面，在第二种可能的实现方式中，所述整流器控制单元具体 用于：
确定所述三相不间断电源接收到的三相交流电中的各相的电压的平均值的绝对值；在所述三相交流电中的各相的电压的平均值的绝对值中的最小值大于第一阈值时，确定所述三相不间断电源零线丢失；将频率为市电的谐波的交流电流作为所述0轴参考电流；根据所述0轴参考电流和0轴采样电流之差生成0轴调制波，以控制所述三相不间断电源中的整流器将接收到的交流电转换为直流电；其中，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一。
结合第三方面，在第三种可能的实现方式中，所述整流器控制单元还用于：
确定所述三相不间断电源零线恢复正常；将母线差参考电压与实际母线差之差经过比例积分后的信号作为所述0轴参考电流；所述母线差参考电压为零。
结合第三方面的第三种可能的实现方式，在第四种可能的实现方式中，所述整流器控制单元具体用于：
确定所述三相不间断电源接收到的三相交流电中的零线上的电流的有效值；在所述接收到的三相交流电中的零线上的电流的有效值大于第二阈值时，确定所述三相不间断电源零线恢复正常；将母线差参考电压与实际母线差之差经过比例积分后的信号作为所述0轴参考电流。
本发明实施例的有益效果包括：
本发明实施例提供的三相UPS的控制方法、装置和三相UPS，由于在零线丢失后，将频率为市电的谐波的交流电流作为0轴参考电流，然后再根据0轴参考电流和0轴采样电流之差生成0轴调制波，以控制三相不间断电源中的整流器将接收到的交流电转换为直流电；由于0轴参考电流和0轴采样电流均为交流，因此，根据0轴参考电流和0轴采样电流之差生成的0轴调制波也是交流的，这相当于在整流器的横桥与竖桥的连接点上施加了一个交流电压，由于该交流电压是市电的谐波，因此，在市电的一个周期内，该交流 电压的平均值为0，因此，在交流电正半周期时流过横桥的电流和交流电的负半周期时流过横桥的电流相等，三相UPS中的正、负母线是平衡的，这克服了正、负母线不平衡的问题。
附图说明
图1为现有技术中的逆变电源系统的结构示意图；
图2为本发明实施例提供的不间断电源系统的结构示意图；
图3为本发明实施例提供的三相不间断电源的控制方法的流程图之一；
图4为本发明实施例提供的三相不间断电源的控制方法的流程图之二；
图5为本发明实施例提供的三相不间断电源的控制方法的流程图之三；
图6为本发明实施例提供的三相不间断电源的控制方法的流程图之四；
图7为本发明实施例提供的三相不间断电源的控制方法的流程图之五；
图8为本发明实施例提供的三相不间断电源的控制方法应用在实际中时的控制逻辑的示意图；
图9为本发明实施例提供的三相不间断电源的控制装置的结构图。
具体实施方式
本发明实施例提供的三相UPS的控制方法、装置和不间断电源，在零线丢失后，将0轴参考电流设置为频率为市电的谐波的交流电流，然后再根据0轴参考电流和0轴采样电流之差生成0轴调制波；由于0轴参考电流和0轴采样电流均为交流，因此，根据0轴参考电流和0轴采样电流之差生成的0轴调制波也是交流的，因此，在交流电正半周期时流过横桥的电流和交流电的负半周期时流过横桥的电流相等，三相UPS中的正、负母线是平衡的，这克服了正、负母线不平衡的问题。
下面结合说明书附图，对本发明实施例提供的一种三相UPS的控制方法、装置及三相UPS的具体实施方式进行说明。
本发明实施例提供的三相UPS的控制方法应用于图2所示的UPS系统 中，其中，整流器21、逆变器22、母线电容C1、母线电容C2、整流电感L构成了UPS。整流器控制单元24根据整流电感L的电流信号、输入电压(即接收到的交流电网的电压)以及正、负母线电压生成调制波，然后在根据生成的调制波生成控制信号控制整流器21工作。图2中还包括负载23。实际中，三相UPS包括3个整流电感和3个整流器，三相交流电通过不同的整流电感输入到不同的整流器中。
本发明实施例提供的一种三相UPS的控制方法，如图3所示，包括：
S301、确定所述三相不间断电源零线丢失；
S302、将频率为市电的谐波的交流电流作为0轴参考电流；
S303、根据0轴参考电流和0轴采样电流之差生成0轴调制波，以控制所述三相不间断电源中的整流器将接收到的交流电转换为直流电；
其中，同一时刻，0轴采样电流i0为三相UPS接收到的三相交流电中的A相的电流ia(即三相UPS中对A相交流电进行整流的整流器连接的整流电感上的电流)、B相的电流ib(即三相UPS中对B相交流电进行整流的整流器连接的整流电感上的电流)和C相的电流ic(即三相UPS中对C相交流电进行整流的整流器连接的整流电感上的电流)之和的三分之一，即i0＝(ia+ib+ic)/3。
零线丢失即图2中交流电网与p点之间的零线断开。市电的频率为f(＝50Hz)，因此，0轴的参考电流的频率为n*f，其中，n为自然数。
上述的0轴可以为旋转坐标系αβ0中的0轴，也可以为旋转坐标系dq0中的0轴。如果上述的0轴为旋转坐标系αβ0中的0轴，那么在生成0轴调制波之后，再对α轴调制波、β轴调制波和生成的0轴调制波进行坐标转换，生成A相调制波、B相调制波和C相调制波。如果上述的0轴为旋转坐标系dq0中的0轴，那么在生成0轴调制波之后，再对d轴调制波、q轴调制波和生成的0轴调制波进行坐标转换，生成A相调制波、B相调制波和C相调制波。其中，0轴调制波的电压U0＝(UsA+UsB+UsC)/3，UsA为A相调制波的电压，UsB为B相调制波的电压，UsC为C相调制波的电压。
其中，A相调制波控制三相UPS中接收A相交流电的整流器将接收到的交流电转换为直流电，B相调制波控制三相UPS中接收B相交流电的整流器将接收到的交流电转换为直流电，C相调制波控制三相UPS中接收C相交流电的整流器将接收到的交流电转换为直流电。
采用本发明实施例提供的三相UPS的控制方法时，三相UPS中的整流器可以采用两电平的拓扑结构、也可以采用三电平的拓扑结构，还可以采用其他的拓扑结构。
可选地，如图4所示，根据0轴参考电流和0轴采样电流之差生成0轴调制波，具体包括：
S401、将所述0轴参考电流和0轴采样电流之差进行比例调节，以使得0轴电流闭环，并使得所述三相不间断电源零线正常时的A相调制波、B相调制波和C相调制波中的每一相调制波的波峰的位置与所述0轴参考电流的波谷位置相同，且该相调制波的波谷的位置与所述0轴参考电流的波峰位置相同；所述0轴参考电流的频率为市电的3N次谐波，N为自然数；
S402、对0轴采样电压与所述比例调节后输出的信号的差进行限幅，得到0轴调制波；
其中，同一时刻，0轴调制波的电压U0等于A相调制波的电压UsA、B相调制波的电压UsB和C相调制波的电压UsC之和的三分之一，即U0＝(UsA+UsB+UsC)/3。
0轴采样电压V0等于三相UPS接收到的三相交流电中的A相交流电的输入电压Ua、三相UPS接收到的三相交流电中的B相交流电的输入电压Ub和三相UPS接收到的三相交流电中的C相交流电的输入电压Uc之和的三分之一，即V0＝(Ua+Ub+Uc)/3。
当0轴参考电流的频率为市电的3N次谐波，通过调节0轴参考电流的位相，0轴参考电流的幅值以及将该0轴参考电流和0轴采样电流之差进行比例调节时的比例，可以使得0轴电流闭环，即使得0轴电流形成负反馈，并使得该三相不间断电源零线正常时的A相调制波、B相调制波和C相调制波中 的每一相调制波的波峰的位置与该0轴的参考电流的波谷位置相同，且该相调制波的波谷的位置与该0轴的参考电流的波峰位置相同，从而使得在叠加该0轴参考电流后得到的A相调制波、B相调制波和C相调制波中的每一相调制波的波峰降低、波谷升高，避免调制波的波峰高于载波的波峰，调制波的波谷低于载波的波谷。
可选地，如图5所示，确定所述三相UPS零线丢失，具体包括:
S501、确定所述三相UPS接收到的三相交流电中的各相的电压的平均值的绝对值；
其中，
Figure PCTCN2015075034-appb-000001
为三相UPS接收到的三相交流电中的A相交流电的电压的平均值，Ua为三相UPS接收到的三相交流电中的A相交流电的电压的瞬时值；
Figure PCTCN2015075034-appb-000002
为三相UPS接收到的三相交流电中的B相交流电的电压的平均值，Ub为三相UPS接收到的三相交流电中的B相交流电的电压的瞬时值；
Figure PCTCN2015075034-appb-000003
为三相UPS接收到的三相交流电中的C相交流电的电压的平均值，Ub为三相UPS接收到的三相交流电中的C相交流电的电压的瞬时值；T为市电周期。
S502、在所述三相UPS接收到的三相交流电中的各相的电压的平均值的绝对值中的最小值大于第一阈值时，确定所述三相UPS零线丢失。
若
Figure PCTCN2015075034-appb-000004
那么在
Figure PCTCN2015075034-appb-000005
大于第一阈值时，确定该三相UPS零线丢失。
可选地，如图6所示，本发明实施例提供的三相UPS的控制方法还包括：
S601、确定所述三相UPS零线恢复正常，即图2中的交流电网与p点之间的零线被接通；
S602、将母线差参考电压VNG_ref与实际母线差VNG之差经过比例积分后的信号作为所述0轴参考电流；所述母线差参考电压VNG_ref为零，即VNG_ref＝0；然后再根据所述0轴参考电流和0轴采样电流之差生成0轴调制波。
其中，实际母线差为VbusP-VbusN，VbusP为正母线电容上的电压，VbusN为负母线电容上的电压。
当零线被接通时，零线上的电流的有效值显然比较大，因此，可选地，如图7所示，确定所述三相UPS零线恢复正常，具体包括：
S701、确定所述三相UPS接收到的三相交流电中的零线上的电流的有效值；
三相UPS接收到的三相交流电中的零线上的电流的有效值
Figure PCTCN2015075034-appb-000006
其中，IN_REC为三相UPS接收到的三相交流电中的零线上的电流的瞬时值；IN_REC＝ILA+ILB+ILC，其中，ILA为所述三相UPS中对A相交流电进行整流的整流器连接的整流电感上的电流的瞬时值，ILB为所述三相UPS中对B相交流电进行整流的整流器连接的整流电感上的电流的瞬时值ILC为所述三相UPS中对C相交流电进行整流的整流器连接的整流电感上的电流的瞬时值。
S702、在所述三相UPS接收到的三相交流电中的零线上的电流的有效值大于第二阈值时，确定所述三相UPS零线恢复正常。
本发明实施例提供的三相UPS的控制方法应用在实际中时如图8所示，图8是以在dq0坐标系中对三相UPS中的整流器进行控制为例进行说明的。母线电压控制是在dq0坐标系的d轴上实现的，包括对母线参考电压与母线电压之差进行比例调节从而控制母线电压，对比例调节后输出的d轴参考电流与d轴采样电流之差进行比例积分，根据d轴采样电压与比例积分后输出的信号确定d轴调制波。无功电流控制是在dq0坐标系的q轴实现的，目的是补偿整流滤波电容对电网端功率因数的影响，使得功率因数接近1，包括根据q轴上的微调量icq和q轴上的微调量的给定值(＝0)生成q轴参考电流，对q轴参考电流与q轴采样电流之差进行比例积分，根据q轴采样电压与比例积分后输出的信号确定q轴调制波。母线差稳态控制在0轴上实现，在母 线电容的中点连接电网的零线的UPS系统中，可以平衡正负母线；在零线未丢失时，对实际母线差和母线差参考电压之差进行比例积分，将比例积分后输出的信号作为0轴参考电流，对0轴参考电流与0轴采样电流之差进行比例调节，对0轴采样电压与比例调节后输出的信号的差进行限幅，得到0轴调制波；而在零线丢失时，谐波生成器根据给定的0轴参考电流的模值和锁相环输出的位相生成0轴参考电流，然后对0轴参考电流与0轴采样电流之差进行比例调节，对0轴采样电压与比例调节后输出的信号的差进行限幅，得到0轴调制波。最后，对d轴调制波、q轴调制波和0轴调制波进行dq0旋转坐标系到静止坐标系的坐标变换得到A相调制波、B相调制波和C相调制波，A相调制波、B相调制波和C相调制波经过脉冲宽度调制后分别得到三相UPS中接收A相交流电的整流器的控制信号、三相UPS中接收B相交流电的整流器的控制信号和三相UPS中接收C相交流电的整流器的控制信号。
其中，d轴采样电流、q轴采样电流和0轴采样电流是三相UPS中对A相交流电进行整流的整流器连接的整流电感上的电流(A相输入电流)、三相UPS中对B相交流电进行整流的整流器连接的整流电感上的电流(B相输入电流)和三相UPS中对C相交流电进行整流的整流器连接的整流电感上的电流(C相输入电流)经过静止坐标系到dq0旋转坐标系的变换后得到的；d轴采样电压、q轴采样电压和0轴采样电压是三相UPS接收到的A相输入电压、三相UPS接收到的B相输入电压和三相UPS接收到的C相输入电压经过静止坐标系到dq0旋转坐标系的变换后得到的。由静止坐标系到dq0旋转坐标系的变换或者由dq0旋转坐标系到静止坐标系的变换中涉及到的角度为转子直轴与A相输入电压之间的夹角，该角度由锁相环根据三相UPS接收到的A相输入电压、B相输入电压和C相输入电压得到，并且，锁相环还会给出0轴参考电流的位相。
基于同一发明构思，本发明实施例还提供了一种三相UPS的控制装置及三相UPS，由于该装置和三相UPS所解决问题的原理与前述三相UPS的控制方法相似，因此该装置和三相UPS的实施可以参见前述方法的实施，重复之 处不再赘述。
本发明实施例提供的三相UPS的控制装置，如图9所示，包括：
确定模块91，用于确定所述三相不间断电源零线丢失；
设置模块92，用于将频率为市电的谐波的交流电流作为0轴参考电流；
生成模块93，根据所述0轴参考电流和0轴采样电流之差生成0轴调制波，以控制所述三相不间断电源中的整流器将接收到的交流电转换为直流电；其中，同一时刻，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一。
可选地，生成模块93具体用于，将所述0轴参考电流和0轴采样电流之差进行比例调节，以使得0轴电流闭环，并使得所述三相不间断电源零线正常时的A相调制波、B相调制波和C相调制波中的每一相调制波的波峰的位置与所述0轴参考电流的波谷位置相同，且该相调制波的波谷的位置与所述0轴的参考电流的波峰位置相同；所述0轴的参考电流的频率为市电的3N次谐波，N为自然数；对0轴采样电压与所述比例调节后输出的信号的差进行限幅，得到0轴调制波；其中，同一时刻，0轴调制波的电压等于A相调制波的电压、B相调制波的电压和C相调制波的电压之和的三分之一。
可选地，确定模块91具体用于，确定所述三相不间断电源接收到的三相交流电中的各相的电压的平均值的绝对值；在所述三相交流电中的各相的电压的平均值的绝对值中的最小值大于第一阈值时，确定所述三相不间断电源零线丢失。
可选地，确定模块91还用于，确定所述三相不间断电源零线恢复正常；设置模块92还用于，将母线差参考电压与实际母线差之差经过比例积分后的信号作为所述0轴参考电流；所述母线差参考电压为零。
可选地，确定模块91具体用于，确定所述三相不间断电源接收到的三相交流电中的零线上的电流的有效值；在所述接收到的三相交流电中的零线上的电流的有效值大于第二阈值时，确定所述三相不间断电源零线恢复正常。
本发明实施例提供的三相不间断电源，如图2所示，包括：
整流器控制单元24，用于确定所述三相不间断电源零线丢失；将频率为市电的谐波的交流电流作为0轴参考电流；根据所述0轴参考电流和0轴采样电流之差生成0轴调制波，以控制所述三相不间断电源中的整流器将接收到的交流电转换为直流电；其中，同一时刻，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一；
整流器21，用于在整流器控制单元24的控制下将接收到的三相交流电转换为直流电输出；
逆变器22，用于将整流器21输出的直流电转换为交流电。
可选地，整流器控制单元24具体用于，确定所述三相不间断电源零线丢失；将频率为市电的3N次谐波的交流电流作为所述0轴参考电流，N为自然数；将所述0轴参考电流和0轴采样电流之差进行比例调节，以使得0轴电流闭环，并使得所述三相不间断电源零线正常时的A相调制波、B相调制波和C相调制波中的每一相调制波的波峰的位置与所述0轴参考电流的波谷位置相同，且该相调制波的波谷的位置与所述0轴的参考电流的波峰位置相同；对0轴采样电压与所述比例调节后输出的信号的差进行限幅，得到0轴调制波；其中，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一；同一时刻，0轴调制波的电压等于A相调制波的电压、B相调制波的电压和C相调制波的电压之和的三分之一。
可选地，整流器控制单元24具体用于，确定所述三相不间断电源接收到的三相交流电中的各相的电压的平均值的绝对值；在所述三相交流电中的各相的电压的平均值的绝对值中的最小值大于第一阈值时，确定所述三相不间断电源零线丢失；将频率为市电的谐波的交流电流作为所述0轴参考电流；根据所述0轴参考电流和0轴采样电流之差生成0轴调制波，以控制所述三相不间断电源中的整流器将接收到的交流电转换为直流电；其中，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相 的电流和C相的电流之和的三分之一。
可选地，整流器控制单元24还用于，确定所述三相不间断电源零线恢复正常；将母线差参考电压与实际母线差之差经过比例积分后的信号作为所述0轴参考电流；所述母线差参考电压为零。
可选地，整流器控制单元24具体用于，确定所述三相不间断电源接收到的三相交流电中的零线上的电流的有效值；在所述接收到的三相交流电中的零线上的电流的有效值大于第二阈值时，确定所述三相不间断电源零线恢复正常；将母线差参考电压与实际母线差之差经过比例积分后的信号作为所述0轴参考电流。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到本发明实施例可以通过硬件实现，也可以借助软件加必要的通用硬件平台的方式来实现。基于这样的理解，本发明实施例的技术方案可以以软件产品的形式体现出来，该软件产品可以存储在一个非易失性存储介质(可以是CD-ROM，U盘，移动硬盘等)中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述的方法。
本领域技术人员可以理解附图只是一个优选实施例的示意图，附图中的模块或流程并不一定是实施本发明所必须的。
本领域技术人员可以理解实施例中的装置中的模块可以按照实施例描述进行分布于实施例的装置中，也可以进行相应变化位于不同于本实施例的一个或多个装置中。上述实施例的模块可以合并为一个模块，也可以进一步拆分成多个子模块。
上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (15)

  1. 一种三相不间断电源的控制方法，其特征在于，包括：
    确定所述三相不间断电源零线丢失；
    将频率为市电的谐波的交流电流作为0轴参考电流；
    根据所述0轴参考电流和0轴采样电流之差生成0轴调制波，以控制所述三相不间断电源中的整流器将接收到的交流电转换为直流电；
    其中，同一时刻，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一。
  2. 如权利要求1所述的方法，其特征在于，根据所述0轴的参考电流和0轴的采样电流之差生成0轴调制波，具体包括：
    将所述0轴参考电流和0轴采样电流之差进行比例调节，以使得0轴电流闭环，并使得所述三相不间断电源零线正常时的A相调制波、B相调制波和C相调制波中的每一相调制波的波峰的位置与所述0轴参考电流的波谷位置相同，且该相调制波的波谷的位置与所述0轴的参考电流的波峰位置相同；所述0轴的参考电流的频率为市电的3N次谐波，N为自然数；
    对0轴采样电压与所述比例调节后输出的信号的差进行限幅，得到0轴调制波；
    其中，同一时刻，0轴调制波的电压等于A相调制波的电压、B相调制波的电压和C相调制波的电压之和的三分之一。
  3. 如权利要求1所述的方法，其特征在于，确定所述三相不间断电源零线丢失，具体包括:
    确定所述三相不间断电源接收到的三相交流电中的各相的电压的平均值的绝对值；
    在所述三相交流电中的各相的电压的平均值的绝对值中的最小值大于第一阈值时，确定所述三相不间断电源零线丢失。
  4. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    确定所述三相不间断电源零线恢复正常；
    将母线差参考电压与实际母线差之差经过比例积分后的信号作为所述0轴参考电流；所述母线差参考电压为零。
  5. 如权利要求4所述的方法，其特征在于，确定所述三相不间断电源零线恢复正常，具体包括：
    确定所述三相不间断电源接收到的三相交流电中的零线上的电流的有效值；
    在所述接收到的三相交流电中的零线上的电流的有效值大于第二阈值时，确定所述三相不间断电源零线恢复正常。
  6. 一种三相不间断电源的控制装置，其特征在于，包括：
    确定模块，用于确定所述三相不间断电源零线丢失；
    设置模块，用于将频率为市电的谐波的交流电流作为0轴参考电流；
    生成模块，根据所述0轴参考电流和0轴采样电流之差生成0轴调制波，以控制所述三相不间断电源中的整流器将接收到的交流电转换为直流电；其中，同一时刻，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一。
  7. 如权利要求6所述的装置，其特征在于，所述生成模块具体用于：
    将所述0轴参考电流和0轴采样电流之差进行比例调节，以使得0轴电流闭环，并使得所述三相不间断电源零线正常时的A相调制波、B相调制波和C相调制波中的每一相调制波的波峰的位置与所述0轴参考电流的波谷位置相同，且该相调制波的波谷的位置与所述0轴的参考电流的波峰位置相同；所述0轴的参考电流的频率为市电的3N次谐波，N为自然数；对0轴采样电压与所述比例调节后输出的信号的差进行限幅，得到0轴调制波；其中，同一时刻，0轴调制波的电压等于A相调制波的电压、B相调制波的电压和C相调制波的电压之和的三分之一。
  8. 如权利要求6所述的装置，其特征在于，所述确定模块具体用于：
    确定所述三相不间断电源接收到的三相交流电中的各相的电压的平均值 的绝对值；在所述三相交流电中的各相的电压的平均值的绝对值中的最小值大于第一阈值时，确定所述三相不间断电源零线丢失。
  9. 如权利要求6所述的装置，其特征在于，所述确定模块还用于，确定所述三相不间断电源零线恢复正常；
    所述设置模块还用于，将母线差参考电压与实际母线差之差经过比例积分后的信号作为所述0轴参考电流；所述母线差参考电压为零。
  10. 如权利要求9所述的装置，其特征在于，所述确定模块具体用于：
    确定所述三相不间断电源接收到的三相交流电中的零线上的电流的有效值；在所述接收到的三相交流电中的零线上的电流的有效值大于第二阈值时，确定所述三相不间断电源零线恢复正常。
  11. 一种三相不间断电源，其特征在于，包括：
    整流器控制单元，用于确定所述三相不间断电源零线丢失；将频率为市电的谐波的交流电流作为0轴参考电流；根据所述0轴参考电流和0轴采样电流之差生成0轴调制波，以控制所述三相不间断电源中的整流器将接收到的交流电转换为直流电；其中，同一时刻，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一；
    整流器，用于在所述整流器控制单元的控制下将接收到的三相交流电转换为直流电输出；
    逆变器，用于将所述整流器输出的直流电转换为交流电。
  12. 如权利要求11所述的三相不间断电源，其特征在于，所述整流器控制单元具体用于：
    确定所述三相不间断电源零线丢失；将频率为市电的谐波的交流电流作为所述0轴参考电流，N为自然数；将所述0轴参考电流和0轴采样电流之差进行比例调节，以使得0轴电流闭环，并使得所述三相不间断电源零线正常时的A相调制波、B相调制波和C相调制波中的每一相调制波的波峰的位置与所述0轴参考电流的波谷位置相同，且该相调制波的波谷的位置与所述0 轴的参考电流的波峰位置相同；对0轴采样电压与所述比例调节后输出的信号的差进行限幅，得到0轴调制波；其中，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一；同一时刻，0轴调制波的电压等于A相调制波的电压、B相调制波的电压和C相调制波的电压之和的三分之一。
  13. 如权利要求11所述的三相不间断电源，其特征在于，所述整流器控制单元具体用于：
    确定所述三相不间断电源接收到的三相交流电中的各相的电压的平均值的绝对值；在所述三相交流电中的各相的电压的平均值的绝对值中的最小值大于第一阈值时，确定所述三相不间断电源零线丢失；将频率为市电的谐波的交流电流作为所述0轴参考电流；根据所述0轴参考电流和0轴采样电流之差生成0轴调制波，以控制所述三相不间断电源中的整流器将接收到的交流电转换为直流电；其中，所述0轴采样电流为所述三相不间断电源接收到的三相交流电中的A相的电流、B相的电流和C相的电流之和的三分之一。
  14. 如权利要求11所述的三相不间断电源，其特征在于，所述整流器控制单元还用于：
    确定所述三相不间断电源零线恢复正常；将母线差参考电压与实际母线差之差经过比例积分后的信号作为所述0轴参考电流；所述母线差参考电压为零。
  15. 如权利要求14所述的三相不间断电源，其特征在于，所述整流器控制单元具体用于：
    确定所述三相不间断电源接收到的三相交流电中的零线上的电流的有效值；在所述接收到的三相交流电中的零线上的电流的有效值大于第二阈值时，确定所述三相不间断电源零线恢复正常；将母线差参考电压与实际母线差之差经过比例积分后的信号作为所述0轴参考电流。
PCT/CN2015/075034 2014-06-27 2015-03-25 一种三相不间断电源的控制方法、装置和三相不间断电源 WO2015196838A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15812564.1A EP3145070B1 (en) 2014-06-27 2015-03-25 Control method and device for three-phase uninterruptible power supply, and three-phase uninterruptible power supply
US15/386,196 US10348127B2 (en) 2014-06-27 2016-12-21 Three-phase uninterruptible power supply control method and apparatus, and three-phase uninterruptible power supply responsive to zero wire loss

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410305779.8 2014-06-27
CN201410305779.8A CN104065276B (zh) 2014-06-27 2014-06-27 一种三相不间断电源的控制方法、装置和三相不间断电源

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/386,196 Continuation US10348127B2 (en) 2014-06-27 2016-12-21 Three-phase uninterruptible power supply control method and apparatus, and three-phase uninterruptible power supply responsive to zero wire loss

Publications (1)

Publication Number Publication Date
WO2015196838A1 true WO2015196838A1 (zh) 2015-12-30

Family

ID=51552847

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/075034 WO2015196838A1 (zh) 2014-06-27 2015-03-25 一种三相不间断电源的控制方法、装置和三相不间断电源

Country Status (4)

Country Link
US (1) US10348127B2 (zh)
EP (1) EP3145070B1 (zh)
CN (1) CN104065276B (zh)
WO (1) WO2015196838A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108562818A (zh) * 2017-12-21 2018-09-21 厦门科华恒盛股份有限公司 一种ups的零线断路检测方法、装置及ups

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104065276B (zh) 2014-06-27 2017-01-25 华为技术有限公司 一种三相不间断电源的控制方法、装置和三相不间断电源
US10574086B2 (en) * 2016-04-08 2020-02-25 Rhombus Energy Solutions, Inc. Nonlinear control algorithm and system for a single-phase AC-AC converter with bidirectional isolated DC-DC converter
CN107612019B (zh) * 2017-08-17 2020-10-23 许继电气股份有限公司 一种组串式光伏逆变器有功功率控制方法及系统
CN107994589B (zh) * 2017-11-24 2023-11-24 深圳市海思瑞科电气技术有限公司 三相四线制静止无功发生器的控制方法及控制电路
WO2019170910A1 (en) * 2018-03-09 2019-09-12 Pbf Group B.V. Power factor converter
CN109298354B (zh) * 2018-11-14 2020-08-11 科华恒盛股份有限公司 一种不间断电源的输入掉零线故障的检测方法及装置

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5432695A (en) * 1993-09-17 1995-07-11 The Center For Innovative Technology Zero-voltage-switched, three-phase PWM rectifier inverter circuit
JPH11266535A (ja) * 1998-03-18 1999-09-28 Mitsubishi Electric Corp 電源高調波抑制装置
CN1476139A (zh) * 2002-08-14 2004-02-18 艾默生网络能源有限公司 带母线均压功能的不间断电源系统
CN1540848A (zh) * 2003-04-22 2004-10-27 深圳市中兴通讯股份有限公司南京分公 三电平输出的三相功率因数校正电路及其控制装置
CN1610231A (zh) * 2003-10-24 2005-04-27 力博特公司 整流器及其控制方法
CN1627620A (zh) * 2003-12-09 2005-06-15 力博特公司 一种在不间断电源断中线后控制其整流器零线电压差的方法
CN1664605A (zh) * 2004-03-05 2005-09-07 力博特公司 检测不间断电源的整流器零线与电网零线之间的断线故障的方法
CN101686006A (zh) * 2008-09-22 2010-03-31 三星电子株式会社 在三相电源中保护功率因数校正的设备及其控制方法
CN102097959A (zh) * 2010-12-28 2011-06-15 易事特电力系统技术有限公司 三相三电平vienna型整流器的空间矢量脉宽调制方法
CN103023358A (zh) * 2012-12-17 2013-04-03 中国科学院电工研究所 三相四线并网电压源型pwm整流器电流参考值计算方法
CN104065276A (zh) * 2014-06-27 2014-09-24 华为技术有限公司 一种三相不间断电源的控制方法、装置和三相不间断电源

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7088601B2 (en) * 2004-01-23 2006-08-08 Eaton Power Quality Corporation Power conversion apparatus and methods using DC bus shifting
US7129677B2 (en) * 2004-03-16 2006-10-31 Tyco Electronics Power Systems, Inc. Vector controller, a polyphase synchronous rectifier, and a method of vector-controlling thereof
JP5365058B2 (ja) * 2008-04-18 2013-12-11 ダイキン工業株式会社 コンバータの制御方法
US7986538B2 (en) * 2008-06-03 2011-07-26 Hamilton Sundstrand Corporation Midpoint current and voltage regulation of a multi-level converter
JP5274236B2 (ja) * 2008-12-25 2013-08-28 株式会社日立製作所 ３相インバータの電源回路保護装置
JP5004366B2 (ja) * 2009-12-07 2012-08-22 株式会社京三製作所 不平衡電圧補償方法、不平衡電圧補償装置、三相コンバータの制御方法、および、三相コンバータの制御装置
US8804388B2 (en) * 2010-12-06 2014-08-12 Hamilton Sundstrand Corporation Active rectification control
AU2011380914B2 (en) * 2011-11-11 2017-03-09 Schneider Electric It Corporation Line balancing ups
CN104272573B (zh) 2012-02-15 2017-04-12 施耐德电气It公司 模块化的三相在线ups

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5432695A (en) * 1993-09-17 1995-07-11 The Center For Innovative Technology Zero-voltage-switched, three-phase PWM rectifier inverter circuit
JPH11266535A (ja) * 1998-03-18 1999-09-28 Mitsubishi Electric Corp 電源高調波抑制装置
CN1476139A (zh) * 2002-08-14 2004-02-18 艾默生网络能源有限公司 带母线均压功能的不间断电源系统
CN1540848A (zh) * 2003-04-22 2004-10-27 深圳市中兴通讯股份有限公司南京分公 三电平输出的三相功率因数校正电路及其控制装置
CN1610231A (zh) * 2003-10-24 2005-04-27 力博特公司 整流器及其控制方法
CN1627620A (zh) * 2003-12-09 2005-06-15 力博特公司 一种在不间断电源断中线后控制其整流器零线电压差的方法
CN1664605A (zh) * 2004-03-05 2005-09-07 力博特公司 检测不间断电源的整流器零线与电网零线之间的断线故障的方法
CN101686006A (zh) * 2008-09-22 2010-03-31 三星电子株式会社 在三相电源中保护功率因数校正的设备及其控制方法
CN102097959A (zh) * 2010-12-28 2011-06-15 易事特电力系统技术有限公司 三相三电平vienna型整流器的空间矢量脉宽调制方法
CN103023358A (zh) * 2012-12-17 2013-04-03 中国科学院电工研究所 三相四线并网电压源型pwm整流器电流参考值计算方法
CN104065276A (zh) * 2014-06-27 2014-09-24 华为技术有限公司 一种三相不间断电源的控制方法、装置和三相不间断电源

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108562818A (zh) * 2017-12-21 2018-09-21 厦门科华恒盛股份有限公司 一种ups的零线断路检测方法、装置及ups
CN108562818B (zh) * 2017-12-21 2020-08-11 科华恒盛股份有限公司 一种ups的零线断路检测方法、装置及ups

Also Published As

Publication number Publication date
CN104065276B (zh) 2017-01-25
CN104065276A (zh) 2014-09-24
US10348127B2 (en) 2019-07-09
EP3145070A1 (en) 2017-03-22
US20170117749A1 (en) 2017-04-27
EP3145070B1 (en) 2019-01-23
EP3145070A4 (en) 2017-06-14

Similar Documents

Publication Publication Date Title
WO2015196838A1 (zh) 一种三相不间断电源的控制方法、装置和三相不间断电源
Ucar et al. Control of a 3-phase 4-leg active power filter under non-ideal mains voltage condition
US8704571B2 (en) Phase-locked-loop with quadrature tracking filter for synchronizing an electric grid
US11641110B2 (en) Apparatus and method for reactive power control
US8816729B2 (en) Phase-locked-loop with quadrature tracking filter for synchronizing an electric grid
CN105470994B (zh) 一种具备环流抑制和谐波抑制能力的微网逆变器控制方法
WO2013004067A1 (zh) 三相多电平pwm变换器的并联结构
Yang et al. Modeling and control of single-phase AC/DC converters
Ngo et al. Grid-connected photovoltaic converters: Topology and grid interconnection
CN109617426B (zh) 一种电力电子变压器电路、电力电子变压器及控制方法
Mohammed et al. Performance evaluation of R-UPQC and L-UPQC based on a novel voltage detection algorithm
CN111030131B (zh) 基于负序虚拟阻抗的mmc-statcom环流抑制装置
KR100706181B1 (ko) 회전좌표계를 이용한 단상 능동전력필터
Rozanov et al. Multifunctional power quality controller based on power electronic converter
Patidar et al. Active and reactive power control and quality management in DG-grid interfaced systems
WO2013026220A1 (zh) 逆变器系统的控制方法、装置及逆变器系统
Dehnavi et al. Employing interface compensators to enhance the power quality in hybrid AC/DC microgrids
WO2014050935A1 (ja) 単相電圧型交直変換装置
JP2011172387A (ja) 電力変換制御装置、コンバータ制御回路、電力変換制御方法、電力変換制御用プログラム及び記録媒体
Hsu et al. Grid Voltage Balancing Strategy Based on Per-Phase-Controlled Inverters
Pouresmaeil et al. Integration of DG sources for compensation of unbalanced loads in the power grid
Jasinski et al. Control of AC-DC-AC converter under unbalanced and distorted input conditions
WO2014050934A1 (ja) 単相電圧型交直変換装置
CN109030968B (zh) 一种储能系统并离网测试系统及方法
Furtado et al. A comparison of two-phase three-wire shunt compensation strategies

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15812564

Country of ref document: EP

Kind code of ref document: A1

REEP Request for entry into the european phase

Ref document number: 2015812564

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2015812564

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE