WO2020107956A1 - 运行控制方法及系统、压缩机、空调器和可读存储介质 - Google Patents

运行控制方法及系统、压缩机、空调器和可读存储介质 Download PDF

Info

Publication number
WO2020107956A1
WO2020107956A1 PCT/CN2019/101695 CN2019101695W WO2020107956A1 WO 2020107956 A1 WO2020107956 A1 WO 2020107956A1 CN 2019101695 W CN2019101695 W CN 2019101695W WO 2020107956 A1 WO2020107956 A1 WO 2020107956A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
power supply
amplitude
compressor
power
Prior art date
Application number
PCT/CN2019/101695
Other languages
English (en)
French (fr)
Inventor
曾贤杰
Original Assignee
广东美的制冷设备有限公司
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
Priority claimed from CN201811458686.3A external-priority patent/CN111256275B/zh
Priority claimed from CN201811460137.XA external-priority patent/CN111256281B/zh
Application filed by 广东美的制冷设备有限公司 filed Critical 广东美的制冷设备有限公司
Publication of WO2020107956A1 publication Critical patent/WO2020107956A1/zh

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Definitions

  • the present application relates to the technical field of circuit control, and in particular, to an operation control method, an operation control system, a compressor, an air conditioner, and a computer-readable storage medium.
  • PFC Power Factor Correction
  • This application aims to solve at least one of the technical problems existing in the prior art or related technologies.
  • the first aspect of the present application proposes an operation control method.
  • the second aspect of the present application proposes an operation control system.
  • the third aspect of the present application proposes a compressor.
  • the fourth aspect of the present application proposes an air conditioner.
  • a fifth aspect of the present application proposes a computer-readable storage medium.
  • the first aspect of the present application provides an operation control method suitable for a power supply control circuit, the power supply control circuit is used to connect the power supply signal of the bus to an electrical load, and the power control circuit is provided with a power factor for electrical connection Correction controller, main control board and electrolytic capacitor, the operation control method includes: collecting the power supply signal of the bus; determining the fundamental phase corresponding to the power supply signal, and determining the higher harmonic signal corresponding to the fundamental phase; according to the higher harmonic The signal determines the duty cycle input to the power factor correction controller; or obtain the electrical load parameter information and collect the fundamental wave amplitude corresponding to the power supply signal; determine the parameter information and the fundamental harmonic amplitude signal corresponding to the compensation; according to the compensation The harmonic signal determines the duty cycle input to the power factor correction controller.
  • the bus power supply signal of the power supply circuit provided with the PCF controller is collected in real time, the corresponding power supply fundamental phase is determined according to the bus power supply signal, and the higher harmonic signal corresponding to the fundamental direction is further determined by changing The duty cycle of the power factor correction controller (ie PFC controller) to inject a higher harmonic signal into the AC input current input to the bus through the power factor correction controller, and "flatten out” by the superimposing effect of the higher harmonic
  • the peak value of the input current waveform makes the peak value of the bus current correspond to the decrease.
  • the corresponding higher harmonic signal is determined according to the bus power supply signal, and the higher harmonic signal is injected into the fundamental wave signal by controlling the duty cycle of the PFC controller, thereby making the input to the bus
  • the fundamental wave of the AC current reduces the amplitude under the influence of the superposition of higher harmonics, thereby reducing the input current fluctuation of the bus, so that the bus capacitance no longer needs to be charged and discharged to maintain the current stability, so the bus capacitance can be effectively reduced.
  • the heat makes it possible to improve the reliability and service life of bus capacitors without replacing large-capacity bus capacitors or increasing hardware costs.
  • the grid voltage input on the AC input side that is, the mains voltage is a sine wave, and can be expressed by the following formula:
  • U in is the fundamental signal of the input voltage of the AC power grid
  • U m is the amplitude of the grid voltage
  • ⁇ t represents the fundamental phase of the grid input voltage
  • the AC side current will also follow the AC voltage as a sine wave, and can be expressed by the following formula:
  • I in is the input current on the AC side
  • I m is the amplitude of the input current
  • ⁇ t represents the fundamental phase of the input current
  • the input power on the AC side can be expressed by the following formula:
  • P in is the input side of the AC power.
  • this application controls the duty cycle of the PFC controller to inject higher harmonic signals into the power supply signal on the AC side of the bus through the PFC module, and reduces the inflow by superimposing the higher harmonics and the AC side fundamental wave The amplitude of the bus's current signal, thereby reducing the bus's input current fluctuations, so that the bus capacitance no longer needs to be charged and discharged to maintain current stability, effectively reducing the bus capacitance heating.
  • the corresponding power supply fundamental amplitude is determined according to the bus power supply signal, and the electrical load, that is, the parameter information of the compressor is obtained;
  • the amplitude of the fundamental wave determines the corresponding compensation harmonic signal.
  • the superimposed harmonic signal and the power supply fundamental wave signal can compensate the torque compensation current superimposed in the compressor control, so that the frequency of the bus capacitor current is the compressor operation.
  • the amplitude of the component of the mechanical frequency decreases.
  • the compensation harmonic signal injected into the bus needs to be determined according to the parameter information of the electrical load in the circuit and the fundamental amplitude of the power supply signal, and further by inputting the corresponding The air ratio controls the PFC controller to inject the compensated harmonic signal into the bus, and then compensate the electrical load through the compensated harmonic signal, such as the torque compensation current superimposed in the compressor control, so that the frequency of the bus capacitor current is the compressor operation
  • the amplitude of the mechanical frequency component is reduced, thereby alleviating the current fluctuation of the bus capacitor, reducing the heating of the bus capacitor, and increasing the service life of the bus capacitor.
  • the operation control method in the above technical solution provided by this application may also have the following additional technical features:
  • determining the higher harmonic signal corresponding to the phase of the fundamental wave is specifically: determining the amplitude of the fundamental wave corresponding to the power supply signal and the target harmonic amplitude corresponding to the higher harmonic signal, and calculating the target The ratio of the harmonic amplitude and the amplitude of the fundamental wave; the higher harmonic signal is calculated according to the ratio, the amplitude of the fundamental wave and the phase of the fundamental wave.
  • the n-th harmonic signal to be injected is confirmed according to the fundamental wave input from the AC side.
  • the fundamental amplitude of the power supply signal and the target harmonic amplitude I m corresponding to the higher harmonic signal need to be determined.
  • I in K1 ⁇ I m ⁇ sin(n ⁇ t);
  • K1 is the ratio of the target harmonic amplitude and the fundamental amplitude, and satisfies 0 ⁇ K1 ⁇ 1
  • n is the harmonic order of the higher harmonics, specifically at least Is a natural number of 2
  • ⁇ t is the fundamental phase.
  • determining the duty ratio input to the power factor correction controller according to the higher harmonic signal includes: determining the boosting factor corresponding to the power supply signal; calculating the power supply signal and the higher harmonic The sum of the signals is used to obtain the superimposed signal; the duty cycle is calculated according to the superimposed signal, the boosting coefficient and the amplitude of the fundamental wave.
  • the boosting factor corresponding to the power supply signal can be determined according to the electrical load, that is, the operating frequency of the compressor, or the boosting factor can be determined according to the bus voltage sampling value and the voltage amplitude of the connected AC power supply signal.
  • the superimposed signal is calculated according to the following formula:
  • I in ′ I m ⁇ sin( ⁇ t)+K1 ⁇ I m ⁇ sin(n ⁇ t);
  • I in ′ is the superimposed signal
  • K1 is the ratio of the target harmonic amplitude and the fundamental amplitude
  • I m is the input current amplitude
  • ⁇ t is the fundamental phase of the input current
  • duty cycle is calculated by the following formula:
  • D is the duty ratio
  • K2 is the boosting coefficient
  • the duty ratio is set to 0.
  • the boost factor K2 when the electrical load, that is, the compressor is running at a lower frequency, the boost factor K2 may be less than 1, and when K2 is less than 1, the value of the duty cycle D calculated by the formula may be Negative, at this time set the duty cycle to 0.
  • determining the parameter information and the compensated harmonic signal corresponding to the fundamental wave amplitude includes: determining the power parameter and voltage parameter corresponding to the power supply signal, calculating the power fluctuation according to the power parameter; Determine the corresponding compensation power; calculate the compensation harmonic signal according to the preset compensation coefficient, compensation power and voltage parameters.
  • the bus output power can be expressed by the following formula:
  • P o is the bus output power
  • p is the number of pole pairs of the compressor
  • ⁇ e is the operating angular frequency of the compressor
  • k e is the compressor's back electromotive force constant.
  • P o ⁇ is bus power fluctuation.
  • this application determines the corresponding compensated harmonic signal I ⁇ through the above parameter information of the compressor and the fundamental amplitude of the power supply signal on the bus.
  • the torque compensation current will cause an increase in the current fluctuation at the same frequency as the compressor operating mechanical frequency on the electrolytic capacitor of the bus, causing the electrolytic capacitor to heat up. Therefore, the corresponding compensation harmonic signal is determined by the above parameter information of the compressor and the fundamental amplitude of the power supply signal on the bus, and the duty ratio corresponding to the compensated harmonic signal is input to the PFC controller to make the PFC to the bus the compensation signal injected into harmonic I ⁇ , and further by the compensation current I ⁇ harmonic signal fluctuations electrolytic capacitor compensation torque caused by the compensation current, the compensation harmonic signal injected after I ⁇ , AC output power available on the bus
  • the corresponding compensation harmonic signal is determined by the above parameter information of the compressor and the fundamental amplitude of the power supply signal on the bus, and the duty ratio corresponding to the compensated harmonic signal is input to the PFC controller to make the PFC to the bus the compensation signal injected into harmonic I ⁇ , and further by the compensation current I ⁇ harmonic signal fluctuations electrolytic capacitor compensation torque caused by the compensation current, the compensation harmonic signal injected
  • P i is the bus AC output power
  • U m is the fundamental voltage amplitude
  • I m is the fundamental current amplitude
  • the compensation power can be expressed as:
  • the compensation coefficient Ko can be added to the above formula, at which time the compensation harmonic signal I ⁇ can be determined by the following formula:
  • determining the duty ratio input to the power factor correction controller according to the compensated harmonic signal specifically includes: determining a boosting factor corresponding to the power supply signal; calculating the power supply signal and the compensated harmonic signal Sum to get the superimposed signal; calculate the duty cycle according to the superimposed signal, boost coefficient and fundamental amplitude.
  • the boost is calculated according to the ratio of the bus voltage amplitude and the input voltage amplitude in the power supply signal Coefficient K, and calculate the corresponding duty cycle by the following formula:
  • D is the duty cycle
  • I in superimposed signals K is the boost coefficient
  • I m is the measured alternating current amplitude of the fundamental.
  • the electrical load is a compressor; and the parameter information specifically includes: the number of pole pairs of the compressor, the operating angular frequency of the compressor, the back electromotive force constant of the compressor, and the torque compensation of the compressor Current.
  • the electrical load is specifically a compressor
  • the parameter information of the compressor includes: the number of pole pairs of the compressor, the operating angular frequency of the compressor, the back electromotive force constant of the compressor, and the torque compensation current of the compressor.
  • the second aspect of the present application provides an operation control system suitable for a power supply control circuit.
  • the power supply control circuit is used to connect the power supply signal of the bus to an electrical load.
  • the power supply control circuit is provided with a power factor correction controller for electrical connection,
  • the main control board and electrolytic capacitors the control system includes: a collection module for collecting the power supply signal of the bus; a control module for determining the fundamental phase corresponding to the power supply signal and determining the higher harmonic signal corresponding to the fundamental phase; And determine the duty cycle input to the power factor correction controller according to the higher harmonic signal; or the collection module is used to obtain the parameter information of the electrical load and collect the fundamental amplitude corresponding to the power supply signal; the control module is used to determine the parameter information The compensated harmonic signal corresponding to the amplitude of the fundamental wave; and determining the duty ratio input to the power factor correction controller according to the compensated harmonic signal.
  • the bus power supply signal of the power supply circuit provided with the PCF controller is collected in real time, the corresponding power supply fundamental phase is determined according to the bus power supply signal, and the higher harmonic signal corresponding to the fundamental direction is further determined by changing The duty cycle of the power factor correction controller (ie PFC controller) to inject a higher harmonic signal into the AC input current input to the bus through the power factor correction controller, and "flatten out” by the superimposing effect of the higher harmonic
  • the peak value of the input current waveform makes the peak value of the bus current correspond to the decrease.
  • the corresponding higher harmonic signal is determined according to the bus power supply signal, and the higher harmonic signal is injected into the fundamental wave signal by controlling the duty cycle of the PFC controller, thereby making the input to the bus
  • the fundamental wave of the AC current reduces the amplitude under the influence of the superposition of higher harmonics, thereby reducing the input current fluctuation of the bus, so that the bus capacitance no longer needs to be charged and discharged to maintain the current stability, so the bus capacitance can be effectively reduced.
  • the heat makes it possible to improve the reliability and service life of bus capacitors without replacing large-capacity bus capacitors or increasing hardware costs.
  • the corresponding power supply fundamental amplitude is determined according to the bus power supply signal, and the electrical load, that is, the parameter information of the compressor is obtained;
  • the amplitude of the fundamental wave determines the corresponding compensation harmonic signal.
  • the superimposed harmonic signal and the power supply fundamental wave signal can compensate the torque compensation current superimposed in the compressor control, so that the frequency of the bus capacitor current is the compressor operation.
  • the amplitude of the component of the mechanical frequency decreases.
  • the compensation harmonic signal injected into the bus needs to be determined according to the parameter information of the electrical load in the circuit and the fundamental amplitude of the power supply signal, and further by inputting the corresponding The air ratio controls the PFC controller to inject the compensated harmonic signal into the bus, and then compensate the electrical load through the compensated harmonic signal, such as the torque compensation current superimposed in the compressor control, so that the frequency of the bus capacitor current is the compressor operation
  • the amplitude of the mechanical frequency component is reduced, thereby alleviating the current fluctuation of the bus capacitor, reducing the heating of the bus capacitor, and increasing the service life of the bus capacitor.
  • control module is further configured to: determine the fundamental amplitude corresponding to the power supply signal and the target harmonic amplitude corresponding to the higher harmonic signal, and calculate the ratio of the target harmonic amplitude and the fundamental amplitude Value; the higher harmonic signal is calculated according to the ratio, fundamental amplitude and fundamental phase.
  • the n-th harmonic signal to be injected is confirmed according to the fundamental wave input from the AC side.
  • the fundamental amplitude of the power supply signal and the target harmonic amplitude I m corresponding to the higher harmonic signal need to be determined.
  • I in K1 ⁇ I m ⁇ sin(n ⁇ t);
  • K1 is the ratio of the target harmonic amplitude and the fundamental amplitude, and satisfies 0 ⁇ K1 ⁇ 1
  • n is the harmonic order of the higher harmonics, specifically at least Is a natural number of 2
  • ⁇ t is the fundamental phase.
  • control module is further configured to: determine the duty ratio input to the power factor correction controller according to the higher harmonic signal, specifically including: determining a boosting factor corresponding to the power supply signal; calculating the power supply The sum of the signal and the higher harmonic signal is used to obtain the superimposed signal; the duty cycle is calculated according to the superimposed signal, the boosting coefficient and the amplitude of the fundamental wave.
  • the boosting factor corresponding to the power supply signal can be determined according to the electrical load, that is, the operating frequency of the compressor, or the boosting factor can be determined according to the bus voltage sampling value and the voltage amplitude of the connected AC power supply signal.
  • the superimposed signal is calculated according to the following formula:
  • I in ′ I m ⁇ sin( ⁇ t)+K1 ⁇ I m ⁇ sin(n ⁇ t);
  • I in ′ is the superimposed signal
  • K1 is the ratio of the target harmonic amplitude and the fundamental amplitude
  • I m is the input current amplitude
  • ⁇ t is the fundamental phase of the input current
  • duty cycle is calculated by the following formula:
  • D is the duty ratio
  • K2 is the boosting coefficient
  • the duty ratio is set to 0.
  • the boost factor K2 when the electrical load, that is, the compressor is running at a lower frequency, the boost factor K2 may be less than 1, and when K2 is less than 1, the value of the duty cycle D calculated by the formula may be Negative, at this time set the duty cycle to 0.
  • control module is further configured to: determine the power parameter and voltage parameter corresponding to the power supply signal, calculate the power fluctuation according to the power parameter; determine the corresponding compensation power according to the power fluctuation; according to the preset compensation coefficient , Compensation power and voltage parameters are used to calculate the compensation harmonic signal.
  • the bus output power can be expressed by the following formula:
  • P o is the bus output power
  • p is the number of pole pairs of the compressor
  • ⁇ e is the operating angular frequency of the compressor
  • k e is the compressor's back electromotive force constant.
  • P o ⁇ is bus power fluctuation.
  • this application determines the corresponding compensated harmonic signal I ⁇ through the above parameter information of the compressor and the fundamental amplitude of the power supply signal on the bus.
  • the torque compensation current will cause an increase in the current fluctuation at the same frequency as the compressor operating mechanical frequency on the electrolytic capacitor of the bus, causing the electrolytic capacitor to heat up. Therefore, the corresponding compensation harmonic signal is determined by the above parameter information of the compressor and the fundamental amplitude of the power supply signal on the bus, and the duty ratio corresponding to the compensated harmonic signal is input to the PFC controller to make the PFC to the bus the compensation signal injected into harmonic I ⁇ , and further by the compensation current I ⁇ harmonic signal fluctuations electrolytic capacitor compensation torque caused by the compensation current, the compensation harmonic signal injected after I ⁇ , AC output power available on the bus
  • the corresponding compensation harmonic signal is determined by the above parameter information of the compressor and the fundamental amplitude of the power supply signal on the bus, and the duty ratio corresponding to the compensated harmonic signal is input to the PFC controller to make the PFC to the bus the compensation signal injected into harmonic I ⁇ , and further by the compensation current I ⁇ harmonic signal fluctuations electrolytic capacitor compensation torque caused by the compensation current, the compensation harmonic signal injected
  • P i is the bus AC output power
  • U m is the fundamental voltage amplitude
  • I m is the fundamental current amplitude
  • the compensation power can be expressed as:
  • the compensation coefficient Ko can be added to the above formula, at which time the compensation harmonic signal I ⁇ can be determined by the following formula:
  • control module is further configured to: determine a boosting factor corresponding to the power supply signal; calculate a sum of the power supply signal and the compensated harmonic signal to obtain a superimposed signal; according to the superimposed signal, the boosting factor and the basis The amplitude is calculated to obtain the duty cycle.
  • the boost is calculated according to the ratio of the bus voltage amplitude and the input voltage amplitude in the power supply signal Coefficient K, and calculate the corresponding duty cycle by the following formula:
  • D is the duty cycle
  • I in superimposed signals K is the boost coefficient
  • I m is the measured alternating current amplitude of the fundamental.
  • the electrical load is a compressor; and the parameter information specifically includes: the number of pole pairs of the compressor, the operating angular frequency of the compressor, the back electromotive force constant of the compressor, and the torque compensation of the compressor Current.
  • the electrical load is specifically a compressor
  • the parameter information of the compressor includes: the number of pole pairs of the compressor, the operating angular frequency of the compressor, the back electromotive force constant of the compressor, and the torque compensation current of the compressor.
  • a third aspect of the present application provides a compressor including the operation control system provided in at least one of the above technical solutions, therefore, the compressor includes all of the operation control system provided in at least one of the above technical solutions Beneficial effect.
  • a fourth aspect of the present application provides an air conditioner including the operation control system provided in the at least one technical solution described above and/or the compressor provided in the at least one technical solution described above. Therefore, the air conditioner includes All the beneficial effects of the operation control system provided in the at least one technical solution and/or the compressor as provided in the at least one technical solution.
  • a fifth aspect of the present application provides a computer-readable storage medium on which a computer program is stored.
  • the operation control method as provided in at least one of the above technical solutions is implemented. Therefore, the computer is readable
  • the storage medium includes all the beneficial effects of the operation control method provided in at least one of the above technical solutions.
  • FIG. 1 shows a flowchart of an operation control method according to an embodiment of the present application
  • FIG. 2 shows a schematic diagram of a power supply control circuit according to an embodiment of the present application
  • 3(A) shows a schematic diagram of a bus input current and a bus output current of a power supply control circuit according to an embodiment of the present application
  • 3(B) shows a schematic diagram of injecting a third harmonic signal into the fundamental wave of the power supply signal on the AC side of the power supply control circuit according to an embodiment of the present application
  • 3(C) shows a schematic diagram of the fifth harmonic signal injected into the fundamental wave of the power supply signal on the AC side of the power supply control circuit according to an embodiment of the present application;
  • 3(D) shows a schematic diagram of the input current of the bus and the duty ratio of the corresponding power factor correction controller after the third harmonic signal is injected into the power supply control circuit according to an embodiment of the present application;
  • FIG. 5 shows a schematic structural diagram of a power supply control circuit according to another embodiment of the present application.
  • FIG. 6 shows a block diagram of an operation control system according to an embodiment of the present application.
  • an operation control method is provided, which is suitable for a power supply control circuit.
  • the power supply control circuit is used to connect the power supply signal of the bus to an electrical load to supply power.
  • the control circuit is provided with an electrically connected power factor correction controller, a main control board and an electrolytic capacitor.
  • the operation control method includes:
  • S104 Determine the fundamental wave phase corresponding to the power supply signal, and determine the higher harmonic signal corresponding to the fundamental wave phase;
  • S106 Determine the duty ratio input to the power factor correction controller according to the higher harmonic signal.
  • the bus power supply signal of the power supply circuit provided with the PCF controller is collected in real time, the corresponding power supply fundamental phase is determined according to the bus power supply signal, and the higher harmonic signal corresponding to the fundamental direction is further determined by changing The duty cycle of the power factor correction controller (ie PFC controller) to inject a higher harmonic signal into the AC input current input to the bus through the power factor correction controller, and "flatten out” by the superimposing effect of the higher harmonic
  • the peak value of the input current waveform makes the peak value of the bus current correspond to the decrease.
  • the corresponding higher harmonic signal is determined according to the bus power supply signal, and the higher harmonic signal is injected into the fundamental wave signal by controlling the duty cycle of the PFC controller, thereby making the input to the bus
  • the fundamental wave of the AC current reduces the amplitude under the influence of the superposition of higher harmonics, thereby reducing the input current fluctuation of the bus, so that the bus capacitance no longer needs to be charged and discharged to maintain the current stability, so the bus capacitance can be effectively reduced.
  • the heat makes it possible to improve the reliability and service life of bus capacitors without replacing large-capacity bus capacitors or increasing hardware costs.
  • the power supply control circuit for a general household air-conditioning power supply circuit, as shown in FIG. 2, the power supply control circuit, the grid voltage input on the AC input side, that is, the mains voltage is a sine wave, and can be expressed by the following formula:
  • U in is the fundamental signal of the input voltage of the AC power grid
  • U m is the amplitude of the grid voltage
  • ⁇ t represents the fundamental phase of the grid input voltage
  • the AC side current will also follow the AC voltage as a sine wave, and can be expressed by the following formula:
  • I in is the input current on the AC side
  • I m is the amplitude of the input current
  • ⁇ t represents the fundamental phase of the input current
  • the input power on the AC side can be expressed by the following formula:
  • P in is the input side of the AC power.
  • the AC input power fluctuates greatly with time, and its fluctuation frequency is twice the grid input frequency. Since the output current of the bus is a DC current without fluctuation, as shown in FIG. 3(A), in order to compensate for the current fluctuation, the bus capacitance will be strongly charged and discharged, which will cause the bus capacitance to heat up seriously.
  • the present application controls the duty cycle of the PFC controller to inject higher harmonic signals into the power supply signal on the AC side of the bus through the PFC module, in particular, it is preferable to inject three times as shown in FIG.
  • the harmonic signal, or the fifth harmonic signal as shown in Figure 3(C) reduces the amplitude of the current signal flowing into the bus by superposition of the higher harmonic and the AC side fundamental wave, thereby reducing the input current fluctuation of the bus, As a result, the bus capacitor no longer needs to be charged and discharged to maintain current stability, effectively reducing the bus capacitor heating.
  • determine the duty cycle input to the power factor correction controller according to the harmonic signal For example, after the third harmonic signal is injected, the corresponding duty cycle is as shown in the figure. 3(D).
  • the operation control method includes:
  • S406 Determine the duty ratio input to the power factor correction controller according to the compensated harmonic signal.
  • the corresponding power supply fundamental amplitude is determined according to the bus power supply signal, and the electrical load, that is, the parameter information of the compressor is obtained;
  • the amplitude of the fundamental wave determines the corresponding compensation harmonic signal.
  • the superimposed harmonic signal and the power supply fundamental wave signal can compensate the torque compensation current superimposed in the compressor control, so that the frequency of the bus capacitor current is the compressor operation.
  • the amplitude of the component of the mechanical frequency decreases.
  • the compensation harmonic signal injected into the bus needs to be determined according to the parameter information of the electrical load in the circuit and the fundamental amplitude of the power supply signal, and further by inputting the corresponding The air ratio controls the PFC controller to inject the compensated harmonic signal into the bus, and then compensate the electrical load through the compensated harmonic signal, such as the torque compensation current superimposed in the compressor control, so that the frequency of the bus capacitor current is the compressor operation
  • the amplitude of the mechanical frequency component is reduced, thereby alleviating the current fluctuation of the bus capacitor, reducing the heating of the bus capacitor, and increasing the service life of the bus capacitor.
  • the power supply control circuit shown in FIG. 5 is provided with an electrically connected PFC controller, a main control chip, and an electrolytic capacitor provided on the bus bar.
  • the power supply control circuit is used to supply power to the compressor.
  • the torque compensation current superimposes a feed-forward compensation amount on the torque current component controlled by the compressor, thus Maintain the speed of the compressor to be basically stable and reduce the vibration of the compressor.
  • this application injects a compensation harmonic signal corresponding to the compressor parameter information and the fundamental amplitude of the power supply signal into the bus, and inputs the duty ratio corresponding to the compensation harmonic signal to the PFC controller to control by the PFC
  • the device injects the compensated harmonic signal into the bus to eliminate the current fluctuation caused by the torque compensation current to the bus capacitor and reduce the heat generation of the bus capacitor.
  • further determining the higher harmonic signal corresponding to the phase of the fundamental wave is specifically: determining the amplitude of the fundamental wave corresponding to the power supply signal and the target harmonic amplitude corresponding to the higher harmonic signal , Calculate the ratio of the target harmonic amplitude and the fundamental amplitude; according to the ratio, fundamental amplitude and fundamental phase calculation to obtain higher harmonic signals.
  • I in K1 ⁇ I m ⁇ sin(n ⁇ t);
  • K1 is the ratio of the target harmonic amplitude and the fundamental amplitude, and satisfies 0 ⁇ K1 ⁇ 1
  • n is the harmonic order of the higher harmonics, specifically at least Is a natural number of 2
  • ⁇ t is the fundamental phase.
  • n 3, and the higher harmonic is the third harmonic.
  • n 5, and the higher harmonic is the fifth harmonic.
  • determining the duty ratio input to the power factor correction controller according to the higher harmonic signal includes: determining the boosting factor corresponding to the power supply signal; calculating the power supply signal and the higher harmonic The sum of the wave signals is used to obtain the superimposed signal; the duty cycle is calculated according to the superimposed signal, the boosting coefficient and the amplitude of the fundamental wave.
  • the boosting factor corresponding to the power supply signal can be determined according to the electrical load, that is, the operating frequency of the compressor, or the boosting factor can be determined according to the bus voltage sampling value and the voltage amplitude of the connected AC power supply signal.
  • the superimposed signal is calculated according to the following formula:
  • I in ′ I m ⁇ sin( ⁇ t)+K1 ⁇ I m ⁇ sin(n ⁇ t);
  • I in ′ is the superimposed signal
  • K1 is the ratio of the target harmonic amplitude and the fundamental amplitude
  • I m is the input current amplitude
  • ⁇ t is the fundamental phase of the input current
  • duty cycle is calculated by the following formula:
  • D is the duty ratio
  • K2 is the boosting coefficient
  • the higher harmonic signal is a third harmonic signal
  • the specific method for calculating and determining the duty ratio is:
  • the bus current input signal After injecting the third harmonic into the standard base sine wave signal input to the AC side, the bus current input signal can be expressed by the following formula:
  • I in I m ⁇ sin( ⁇ t)+K1 ⁇ I m ⁇ sin(3 ⁇ t);
  • I in is the superimposed bus current input signal
  • I m is the fundamental amplitude of the input current
  • K1 is the ratio of the injected third harmonic amplitude and the fundamental amplitude
  • ⁇ t represents the fundamental phase of the input current
  • the duty cycle D of the PFC controller should be:
  • I in is the superimposed bus current input signal
  • I m is the fundamental amplitude of the input current
  • K1 is the ratio of the injected third harmonic amplitude and the fundamental amplitude
  • ⁇ t represents the input
  • K2 is the boost coefficient.
  • the duty ratio is set to 0.
  • the boost factor K2 when the electrical load, that is, the compressor is running at a lower frequency, the boost factor K2 may be less than 1, and when K2 is less than 1, the value of the duty cycle D calculated by the formula may be Negative, at this time set the duty cycle to 0.
  • further determining the parameter information and the compensated harmonic signal corresponding to the fundamental amplitude includes specifically: determining the power parameter and voltage parameter corresponding to the power supply signal, calculating the power fluctuation according to the power parameter; according to the power Fluctuation determines the corresponding compensation power; the compensation harmonic signal is calculated according to the preset compensation coefficient, compensation power and voltage parameters.
  • the bus output power can be expressed by the following formula:
  • P o is the bus output power
  • p is the number of pole pairs of the compressor
  • ⁇ e is the operating angular frequency of the compressor
  • k e is the compressor's back electromotive force constant.
  • P o ⁇ is bus power fluctuation.
  • this application determines the corresponding compensated harmonic signal I ⁇ through the above parameter information of the compressor and the fundamental amplitude of the power supply signal on the bus.
  • the torque compensation current will cause an increase in the current fluctuation at the same frequency as the compressor operating mechanical frequency on the electrolytic capacitor of the bus, causing the electrolytic capacitor to heat up. Therefore, the corresponding compensation harmonic signal is determined by the above parameter information of the compressor and the fundamental amplitude of the power supply signal on the bus, and the duty ratio corresponding to the compensated harmonic signal is input to the PFC controller to make the PFC to the bus the compensation signal injected into harmonic I ⁇ , and further by the compensation current I ⁇ harmonic signal fluctuations electrolytic capacitor compensation torque caused by the compensation current, the compensation harmonic signal injected after I ⁇ , AC output power available on the bus
  • the corresponding compensation harmonic signal is determined by the above parameter information of the compressor and the fundamental amplitude of the power supply signal on the bus, and the duty ratio corresponding to the compensated harmonic signal is input to the PFC controller to make the PFC to the bus the compensation signal injected into harmonic I ⁇ , and further by the compensation current I ⁇ harmonic signal fluctuations electrolytic capacitor compensation torque caused by the compensation current, the compensation harmonic signal injected
  • P i is the bus AC output power
  • U m is the fundamental voltage amplitude
  • I m is the fundamental current amplitude
  • the compensation power can be expressed as:
  • the compensation coefficient Ko can be added to the above formula, at which time the compensation harmonic signal I ⁇ can be determined by the following formula:
  • further determining the duty ratio input to the power factor correction controller according to the compensated harmonic signal specifically includes: determining a boost coefficient corresponding to the power supply signal; calculating the power supply signal and the compensated harmonic signal To get the superimposed signal; calculate the duty cycle based on the superimposed signal, boost coefficient and fundamental amplitude.
  • the boost is calculated according to the ratio of the bus voltage amplitude and the input voltage amplitude in the power supply signal Coefficient K, and calculate the corresponding duty cycle by the following formula:
  • D is the duty cycle
  • I in superimposed signals K is the boost coefficient
  • I m is the measured alternating current amplitude of the fundamental.
  • the electrical load is a compressor
  • the parameter information specifically includes: the number of pole pairs of the compressor, the operating angular frequency of the compressor, the back electromotive force constant of the compressor, and the torque of the compressor Compensation current.
  • the electrical load is specifically a compressor
  • the parameter information of the compressor includes: the number of pole pairs of the compressor, the operating angular frequency of the compressor, the back electromotive force constant of the compressor, and the torque compensation current of the compressor.
  • an operation control system 600 is provided, which is suitable for a power supply control circuit.
  • the power supply control circuit is used to connect a power supply signal of a bus to an electrical load, and the power supply control circuit
  • the power factor correction controller, the main control board and the electrolytic capacitor are electrically connected, and the operation control system 600 includes: a collection module 602 and a control module 604.
  • the collection module 602 is used to collect the power supply signal of the bus;
  • the control module 604 is used to determine the fundamental phase corresponding to the power supply signal and the higher harmonic signal corresponding to the fundamental phase; and according to the higher harmonic
  • the wave signal determines the duty cycle input to the power factor correction controller.
  • the bus power supply signal of the power supply circuit provided with the PCF controller is collected in real time, the corresponding power supply fundamental phase is determined according to the bus power supply signal, and the higher harmonic signal corresponding to the fundamental direction is further determined by changing The duty cycle of the power factor correction controller (ie PFC controller) to inject a higher harmonic signal into the AC input current input to the bus through the power factor correction controller, and "flatten out” by the superimposing effect of the higher harmonic
  • the peak value of the input current waveform makes the peak value of the bus current correspond to the decrease.
  • the corresponding higher harmonic signal is determined according to the bus power supply signal, and the higher harmonic signal is injected into the fundamental wave signal by controlling the duty cycle of the PFC controller, thereby making the input to the bus
  • the fundamental wave of the AC current reduces the amplitude under the influence of the superposition of higher harmonics, thereby reducing the input current fluctuation of the bus, so that the bus capacitance no longer needs to be charged and discharged to maintain the current stability, so the bus capacitance can be effectively reduced.
  • the heat makes it possible to improve the reliability and service life of bus capacitors without replacing large-capacity bus capacitors or increasing hardware costs.
  • the collection module 602 is used to obtain the parameter information of the electrical load and collect the fundamental wave amplitude corresponding to the power supply signal; the control module 604 is used to determine the parameter information and the compensated harmonic signal corresponding to the fundamental wave amplitude; And determine the duty ratio input to the power factor correction controller according to the compensated harmonic signal.
  • the corresponding power supply fundamental amplitude is determined according to the bus power supply signal, and the electrical load, that is, the parameter information of the compressor is obtained;
  • the amplitude of the fundamental wave determines the corresponding compensation harmonic signal.
  • the superimposed harmonic signal and the power supply fundamental wave signal can compensate the torque compensation current superimposed in the compressor control, so that the frequency of the bus capacitor current is the compressor operation.
  • the amplitude of the component of the mechanical frequency decreases.
  • the compensation harmonic signal injected into the bus needs to be determined according to the parameter information of the electrical load in the circuit and the fundamental amplitude of the power supply signal, and further by inputting the corresponding The air ratio controls the PFC controller to inject the compensated harmonic signal into the bus, and then compensate the electrical load through the compensated harmonic signal, such as the torque compensation current superimposed in the compressor control, so that the frequency of the bus capacitor current is the compressor operation
  • the amplitude of the mechanical frequency component is reduced, thereby alleviating the current fluctuation of the bus capacitor, reducing the heating of the bus capacitor, and increasing the service life of the bus capacitor.
  • control module is further configured to: determine the fundamental amplitude corresponding to the power supply signal and the target harmonic amplitude corresponding to the higher harmonic signal, and calculate the ratio of the target harmonic amplitude Fundamental amplitude; the higher harmonic signal is calculated according to the ratio, fundamental amplitude and fundamental phase.
  • I in K1 ⁇ I m ⁇ sin(n ⁇ t);
  • K1 is the ratio of the target harmonic amplitude and the fundamental amplitude, and satisfies 0 ⁇ K1 ⁇ 1
  • n is the harmonic order of the higher harmonics, specifically at least Is a natural number of 2
  • ⁇ t is the fundamental phase.
  • control module is further configured to: determine the duty ratio input to the power factor correction controller according to the higher harmonic signal, specifically including: determining a boosting factor corresponding to the power supply signal; calculation The sum of the power supply signal and the higher harmonic signal is used to obtain the superimposed signal; the duty ratio is calculated according to the superimposed signal, the boosting coefficient and the amplitude of the fundamental wave.
  • the boosting factor corresponding to the power supply signal can be determined according to the electrical load, that is, the operating frequency of the compressor, or the boosting factor can be determined according to the bus voltage sampling value and the voltage amplitude of the connected AC power supply signal.
  • the superimposed signal is calculated according to the following formula:
  • I in ′ I m ⁇ sin( ⁇ t)+K1 ⁇ I m ⁇ sin(3 ⁇ t);
  • I in ′ is the superimposed signal
  • K1 is the ratio of the target harmonic amplitude and the fundamental amplitude
  • I m is the input current amplitude
  • ⁇ t is the fundamental phase of the input current
  • duty cycle is calculated by the following formula:
  • D is the duty ratio
  • K2 is the boosting coefficient
  • the duty ratio is set to 0.
  • the boost factor K2 when the electrical load, that is, the compressor is running at a lower frequency, the boost factor K2 may be less than 1, and when K2 is less than 1, the value of the duty cycle D calculated by the formula may be Negative, at this time set the duty cycle to 0.
  • control module is further configured to: determine the power parameter and voltage parameter corresponding to the power supply signal, calculate the power fluctuation according to the power parameter; determine the corresponding compensation power according to the power fluctuation; according to the preset compensation
  • the coefficient, compensation power and voltage parameters are used to calculate the compensation harmonic signal.
  • the bus output power can be expressed by the following formula:
  • P o is the bus output power
  • p is the number of pole pairs of the compressor
  • ⁇ e is the operating angular frequency of the compressor
  • k e is the compressor's back electromotive force constant.
  • P o ⁇ is bus power fluctuation.
  • this application determines the corresponding compensated harmonic signal I ⁇ through the above parameter information of the compressor and the fundamental amplitude of the power supply signal on the bus.
  • the torque compensation current will cause an increase in the current fluctuation at the same frequency as the compressor operating mechanical frequency on the electrolytic capacitor of the bus, causing the electrolytic capacitor to heat up. Therefore, the corresponding compensation harmonic signal is determined by the above parameter information of the compressor and the fundamental amplitude of the power supply signal on the bus, and the duty ratio corresponding to the compensated harmonic signal is input to the PFC controller to make the PFC to the bus the compensation signal injected into harmonic I ⁇ , and further by the compensation current I ⁇ harmonic signal fluctuations electrolytic capacitor compensation torque caused by the compensation current, the compensation harmonic signal injected after I ⁇ , AC output power available on the bus
  • the corresponding compensation harmonic signal is determined by the above parameter information of the compressor and the fundamental amplitude of the power supply signal on the bus, and the duty ratio corresponding to the compensated harmonic signal is input to the PFC controller to make the PFC to the bus the compensation signal injected into harmonic I ⁇ , and further by the compensation current I ⁇ harmonic signal fluctuations electrolytic capacitor compensation torque caused by the compensation current, the compensation harmonic signal injected
  • P i is the bus AC output power
  • U m is the fundamental voltage amplitude
  • I m is the fundamental current amplitude
  • the compensation power can be expressed as:
  • the compensation coefficient Ko can be added to the above formula, at which time the compensation harmonic signal I ⁇ can be determined by the following formula:
  • control module is further configured to: determine a boosting factor corresponding to the power supply signal; calculate a sum of the power supply signal and the compensated harmonic signal to obtain a superimposed signal; The duty cycle is calculated from the amplitude of the fundamental wave.
  • the boost is calculated according to the ratio of the bus voltage amplitude and the input voltage amplitude in the power supply signal Coefficient K, and calculate the corresponding duty cycle by the following formula:
  • D is the duty cycle
  • I in superimposed signals K is the boost coefficient
  • I m is the measured alternating current amplitude of the fundamental.
  • the electrical load is a compressor
  • the parameter information specifically includes: the number of pole pairs of the compressor, the operating angular frequency of the compressor, the back electromotive force constant of the compressor, and the torque of the compressor Compensation current.
  • the electrical load is specifically a compressor
  • the parameter information of the compressor includes: the number of pole pairs of the compressor, the operating angular frequency of the compressor, the back electromotive force constant of the compressor, and the torque compensation current of the compressor.
  • a compressor in an embodiment of the third aspect of the present application, includes the operation control system provided in at least one embodiment above, therefore, the compressor includes as provided in at least one embodiment above All beneficial effects of the operation control system.
  • an air conditioner in an embodiment of the fourth aspect of the present application, includes the operation control system as provided in the at least one embodiment above and/or the compressor as provided in the at least one embodiment above, therefore The air conditioner includes all the beneficial effects of the operation control system provided in the at least one embodiment described above and/or the compressor provided in the at least one embodiment described above.
  • a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the operation control method as provided in the at least one embodiment described above is implemented, therefore
  • the computer-readable storage medium includes all the beneficial effects of the operation control method provided in at least one embodiment described above.
  • connection can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or through an intermediary Indirectly connected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Ac Motors In General (AREA)
  • Inverter Devices (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

一种运行控制方法及系统、压缩机、空调器和可读存储介质,其中,运行控制方法包括:收集母线的供电信号;确定供电信号对应的基波相位,并确定与基波相位对应的高次谐波信号;根据高次谐波信号确定输入至功率因数矫正控制器的占空比;或获取电气负载的参数信息,并采集供电信号对应的基波幅值;确定参数信息和基波幅值对应的补偿谐波信号;根据补偿谐波信号确定输入至功率因数矫正控制器的占空比。应用该运行控制方法,可以有效的降低母线电容发热量,使得可以在不更换大容量母线电容、不增加硬件成本的情况下提升母线电容的可靠性和使用寿命。

Description

运行控制方法及系统、压缩机、空调器和可读存储介质
本申请要求于2018年11月30日提交中国专利局、申请号为201811458686.3、发明名称为“运行控制方法及系统、压缩机和空调器”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。
本申请要求于2018年11月30日提交中国专利局、申请号为201811460137.X、发明名称为“运行控制方法及系统、压缩机和空调器”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
本申请涉及电路控制技术领域,具体而言,涉及一种运行控制方法、一种运行控制系统、一种压缩机、一种空调器和一种计算机可读存储介质。
背景技术
一般来说,在家用空调等应用场合,普遍采用PFC(Power Factor Correction,功率因数矫正)电路来实现功率因数矫正,交流输入通过整流和PFC电路后,借助大容量的电解电容得到相对稳定的直流供电。在交流输入侧,通常接入市电电网,电网电压为正弦波,而在PFC的作用下,交流侧电流会跟随交流电压变化,同样表现为正弦波,因此交流输入功率是大幅波动的,且频率为两倍电网频率,作为结果,直流母线输入电流也是大幅波动的,且频率为两倍电网频率。而母线输出功率需要基本维持恒定,即母线输出电流需要基本维持稳定,因此母线电容需要产生强烈的充放电以维持电流稳定,这会导致母线电容发热,降低母线电容寿命。
一般地,为了解决上述问题,需要选取大容量的母线电容,从而提升母线电容充放电能力,而选择大容量的母线电容会额外增加成本开销。
因此,目前亟需一种能解决由于电流波动导致母线电容寿命降低,同时又不增加额外成本的技术方案。
申请内容
本申请旨在至少解决现有技术或相关技术中存在的技术问题之一。
为此,本申请的第一方面提出一种运行控制方法。
本申请的第二方面提出一种运行控制系统。
本申请的第三方面提出一种压缩机。
本申请的第四方面提出一种空调器。
本申请的第五方面提出一种计算机可读存储介质。
有鉴于此,本申请的第一方面提供了一种运行控制方法,适用于供电控制电路,供电控制电路用于将母线的供电信号接入电气负载,供电控制电路中设有电连接的功率因数矫正控制器、主控板和电解电容,运行控制方法包括:收集母线的供电信号;确定供电信号对应的基波相位,并确定与基波相位对应的高次谐波信号;根据高次谐波信号确定输入至功率因数矫正控制器的占空比;或获取电气负载的参数信息,并采集供电信号对应的基波幅值;确定参数信息和基波幅值对应的补偿谐波信号;根据补偿谐波信号确定输入至功率因数矫正控制器的占空比。
在该技术方案中,实时收集设置有PCF控制器的供电电路的母线供电信号,根据母线供电信号确定对应的供电基波相位,并进一步确定与基波向对应的高次谐波信号,通过改变功率因数矫正控制器(即PFC控制器)的占空比,以通过功率因数矫正控制器向输入至母线的交流输入电流中注入高次谐波信号,通过高次谐波的叠加效果“削平”输入电流波形的峰值,使得母线电流峰值对应于下降。应用了本申请限定的技术方案,通过根据母线供电信号确定对应的高次谐波信号,通过控制PFC控制器的占空比向基波信号中注入高次谐波信号,进而使得输入至母线的交流电流的基波在高次谐波的叠加影响下降低幅值,进而降低母线的输入电流波动,使得母线电容不再需要通过强烈的充放电以维持电流稳定,因此可以有效的降低母线电容发热量,使得可以在不更换大容量母线电容、不增加硬件成本的情况下提升母线电容的可靠性和使用寿命。
具体地,针对一般的家用空调供电电路,在交流输入侧输入的电网电压,即市电电压为正弦波,并可通过下式表示:
U in=U m×sin(ωt);
其中,U in为交流测电网输入电压基波信号,U m为电网电压幅值,ωt表示电网输入电压的基波相位。
在PFC控制器的作用下,交流侧电流也会跟随交流电压呈正弦波,并可通过下式表达:
I in=I m×sin(ωt);
其中,I in为交流侧输入电流,I m为输入电流幅值,ωt表示输入电流的基波相位。
因此,交流侧的输入功率可通过下式表达:
Figure PCTCN2019101695-appb-000001
其中,P in为交流侧的输入功率。
由此可见,交流输入功率是随时间大幅波动的,且其波动频率为电网输入频率的两倍。因此会导致母线电容强烈充、放电,进而导致母线电容严重发热。为了解决上述问题,本申请通过控制PFC控制器的占空比,以通过PFC模块向母线交流侧的供电信号中注入高次谐波信号,通过高次谐波与交流侧基波的叠加降低流入母线的电流信号的幅值,进而降低母线的输入电流波动,从而使得母线电容不再需要通过强烈的充放电以维持电流稳定,有效降低母线电容发热。
实时采集设置有PFC(Power Factor Correction,功率因数矫正)控制器的供电电路的母线供电信号,根据母线供电信号确定对应的供电基波幅值,同时获取电气负载,即压缩机的参数信息;根据基波幅值确定与其相对应的补偿谐波信号,该补偿谐波信号与供电基波信号叠加后可补偿压缩机控制中叠加的转矩补偿电流,使得母线电容电流中,频率为压缩机运行机械频率的分量幅值减小。在确定了补偿谐波信号后,根据补偿谐波信号确定输入至功率因数矫正控制器的占空比,通过该占空比控制PFC控制器向母线注入补偿谐波信号。应用了本申请提供的技术方案,通过根据电路中电气负载的参数信息,以及供电信号的基波幅值需要确定向母线中注入的补偿谐波信号,并进一步通过向PFC控制器输入对应的占空比以控制PFC控制器向母线注入该补偿谐波信号,进而通过该补偿谐波信号补偿电 气负载,如压缩机控制中叠加的转矩补偿电流,使得母线电容电流中,频率为压缩机运行机械频率的分量幅值减小,进而缓解母线电容的电流波动,降低母线电容的发热,增加母线电容的使用寿命。另外,本申请提供的上述技术方案中运行控制方法还可以具有如下附加技术特征:
在上述技术方案中,进一步地,确定与基波相位对应的高次谐波信号,具体为:确定供电信号对应的基波幅值和高次谐波信号对应的目标谐波幅值,计算目标谐波幅值的比值和基波幅值;根据比值、基波幅值和基波相位计算得到高次谐波信号。
在该技术方案中,根据交流侧输入的基波确认所需注入的n次谐波信号,首先需要确定供电信号的基波幅值和高次谐波信号对应的目标谐波幅值I m,计算目标谐波幅值的比值和基波幅值K1,并通过以下公式计算对应的n次谐波信号:
I in=K1×I m×sin(nωt);
其中,I in为所述n次谐波信号,K1为目标谐波幅值的比值和基波幅值,且满足0≤K1≤1,n为高次谐波的谐波次数,具体为至少是2的自然数,ωt为基波相位。
在上述至少一个技术方案中,进一步地,根据高次谐波信号确定输入至功率因数矫正控制器的占空比,具体包括:确定供电信号对应的升压系数;计算供电信号和高次谐波信号的和以得到叠加信号;根据叠加信号、升压系数和基波幅值计算得到占空比。
在该技术方案中,根据电气负载,即压缩机的运行频率可以确定供电信号对应的升压系数,也可根据母线电压采样值和所接入的交流供电信号的电压幅值确定升压系数。同时根据以下公式计算叠加信号:
I in′=I m×sin(ωt)+K1×I m×sin(nωt);
其中,I in′为叠加信号,K1为目标谐波幅值的比值和基波幅值,I m为输入电流幅值,ωt表示输入电流的基波相位。
进一步地,通过以下公式计算占空比:
Figure PCTCN2019101695-appb-000002
其中,D为占空比,K2为升压系数。
在上述至少一个技术方案中,进一步地,在收集到所述占空比的数值为负值时,将所述占空比设置为0。
在该技术方案中,由于当电气负载,即压缩机以较低频率运行时,升压系数K2可能会小于1,而当K2小于1时,通过公式计算得到的占空比D的数值可能为负,此时将占空比设置为0。
在上述至少一个技术方案中,进一步地,确定参数信息和基波幅值对应的补偿谐波信号,具体包括:确定供电信号对应的功率参数和电压参数,根据功率参数计算功率波动;根据功率波动确定对应的补偿功率;根据预设的补偿系数、补偿功率和电压参数计算补偿谐波信号。
在该技术方案中,压缩机控制的转矩电流分量为I q,叠加的转矩补偿电流为I qcom,则母线输出功率可通过下式表示:
Figure PCTCN2019101695-appb-000003
其中,P o为母线输出功率,p为压缩机的极对数,ω e为压缩机的运行角频率,k e为压缩机的反电动势常数。
由此,由于转矩补偿电流引起的母线功率波动可表示为:
Figure PCTCN2019101695-appb-000004
其中,P 为母线功率波动。
为了补偿上述功率波动,降低上述功率波动造成的母线电容上的电流波动,本申请通过压缩机的上述参数信息,以及母线上的供电信号的基波幅值确定对应的补偿谐波信号I Δ
而该转矩补偿电流会导致母线的电解电容上增加与压缩机运行机械频率同频率的电流波动,造成电解电容发热。因此通过压缩机的上述参数信息,以及母线上的供电信号的基波幅值确定对应的补偿谐波信号,并向PFC控制器输入与补偿谐波信号对应的占空比,以使PFC向母线中注入该补偿谐波信号I Δ,进而通过该补偿谐波信号I Δ补偿转矩补偿电流造成的电解电容上的电流波动,在注入补偿谐波信号I Δ后,母线上的交流输出功率可表示为:
P i=U msinθ×(I msinθ+I Δ);
其中,P i为母线交流输出功率,U m为基波电压幅值,I m为基波电流幅值。
其中,补偿功率可表示为:
P =U msinθ×I Δ
进一步地,根据功率平衡,可知P =P ,因此可以通过以下公式确定补偿谐波信号I Δ
Figure PCTCN2019101695-appb-000005
其中,p为压缩机的极对数,ω e为压缩机的运行角频率,k e为压缩机的反电动势常数,I qcom为转矩补偿电流,U m为基波电压幅值。
进一步地,可以在上式中增加补偿系数Ko,此时可以通过以下公式确定补偿谐波信号I Δ
Figure PCTCN2019101695-appb-000006
其中,0≤Ko≤1,当Ko取0时,不进行补偿,而当Ko取1时,进行完全补偿。
在上述至少一个技术方案中,进一步地,根据补偿谐波信号确定输入至功率因数矫正控制器的占空比,具体包括:确定供电信号对应的升压系数;计算供电信号和补偿谐波信号的和以得到叠加信号;根据叠加信号、升压系数和基波幅值计算得到占空比。
在该技术方案中,在确定了补偿谐波信号后,进一步确定供电信号和补偿谐波信号的和以得到叠加信号,并根据母线电压幅值和供电信号中输入电压幅值的比值计算升压系数K,并通过以下公式计算对应的占空比:
Figure PCTCN2019101695-appb-000007
其中,D为占空比,I in为叠加信号,K为升压系数,I m为交流测基波电流幅值。
在上述至少一个技术方案中,进一步地,电气负载为压缩机;以及参数信息具体包括:压缩机的极对数、压缩机的运行角频率、压缩机的反电动势常数和压缩机的转矩补偿电流。
在该技术方案中,电气负载具体为压缩机,压缩机的参数信息包括:压缩机的极对数、压缩机的运行角频率、压缩机的反电动势常数和压缩机的转矩补偿电流。
本申请的第二方面提供了一种运行控制系统,适用于供电控制电路, 供电控制电路用于将母线的供电信号接入电气负载,供电控制电路中设有电连接的功率因数矫正控制器、主控板和电解电容,控制系统包括:收集模块,用于收集母线的供电信号;控制模块,用于确定供电信号对应的基波相位,并确定与基波相位对应的高次谐波信号;以及根据高次谐波信号确定输入至功率因数矫正控制器的占空比;或收集模块用于获取电气负载的参数信息,并采集供电信号对应的基波幅值;控制模块用于确定参数信息和基波幅值对应的补偿谐波信号;以及根据补偿谐波信号确定输入至功率因数矫正控制器的占空比。
在该技术方案中,实时收集设置有PCF控制器的供电电路的母线供电信号,根据母线供电信号确定对应的供电基波相位,并进一步确定与基波向对应的高次谐波信号,通过改变功率因数矫正控制器(即PFC控制器)的占空比,以通过功率因数矫正控制器向输入至母线的交流输入电流中注入高次谐波信号,通过高次谐波的叠加效果“削平”输入电流波形的峰值,使得母线电流峰值对应于下降。应用了本申请限定的技术方案,通过根据母线供电信号确定对应的高次谐波信号,通过控制PFC控制器的占空比向基波信号中注入高次谐波信号,进而使得输入至母线的交流电流的基波在高次谐波的叠加影响下降低幅值,进而降低母线的输入电流波动,使得母线电容不再需要通过强烈的充放电以维持电流稳定,因此可以有效的降低母线电容发热量,使得可以在不更换大容量母线电容、不增加硬件成本的情况下提升母线电容的可靠性和使用寿命。
实时采集设置有PFC(Power Factor Correction,功率因数矫正)控制器的供电电路的母线供电信号,根据母线供电信号确定对应的供电基波幅值,同时获取电气负载,即压缩机的参数信息;根据基波幅值确定与其相对应的补偿谐波信号,该补偿谐波信号与供电基波信号叠加后可补偿压缩机控制中叠加的转矩补偿电流,使得母线电容电流中,频率为压缩机运行机械频率的分量幅值减小。在确定了补偿谐波信号后,根据补偿谐波信号确定输入至功率因数矫正控制器的占空比,通过该占空比控制PFC控制器向母线注入补偿谐波信号。应用了本申请提供的技术方案,通过根据电路中电气负载的参数信息,以及供电信号的基波幅值需要确定向母线中注入 的补偿谐波信号,并进一步通过向PFC控制器输入对应的占空比以控制PFC控制器向母线注入该补偿谐波信号,进而通过该补偿谐波信号补偿电气负载,如压缩机控制中叠加的转矩补偿电流,使得母线电容电流中,频率为压缩机运行机械频率的分量幅值减小,进而缓解母线电容的电流波动,降低母线电容的发热,增加母线电容的使用寿命。
在上述技术方案中,进一步地,控制模块还用于:确定供电信号对应的基波幅值和高次谐波信号对应的目标谐波幅值,计算目标谐波幅值的比值和基波幅值;根据比值、基波幅值和基波相位计算得到高次谐波信号。
在该技术方案中,根据交流侧输入的基波确认所需注入的n次谐波信号,首先需要确定供电信号的基波幅值和高次谐波信号对应的目标谐波幅值I m,计算目标谐波幅值的比值和基波幅值的比值K1,并通过以下公式计算对应的n次谐波信号:
I in=K1×I m×sin(nωt);
其中,I in为所述n次谐波信号,K1为目标谐波幅值的比值和基波幅值,且满足0≤K1≤1,n为高次谐波的谐波次数,具体为至少是2的自然数,ωt为基波相位。
在上述至少一个技术方案中,进一步地,控制模块还用于:根据高次谐波信号确定输入至功率因数矫正控制器的占空比,具体包括:确定供电信号对应的升压系数;计算供电信号和高次谐波信号的和以得到叠加信号;根据叠加信号、升压系数和基波幅值计算得到占空比。
在该技术方案中,根据电气负载,即压缩机的运行频率可以确定供电信号对应的升压系数,也可根据母线电压采样值和所接入的交流供电信号的电压幅值确定升压系数。同时根据以下公式计算叠加信号:
I in′=I m×sin(ωt)+K1×I m×sin(nωt);
其中,I in′为叠加信号,K1为目标谐波幅值的比值和基波幅值,I m为输入电流幅值,ωt表示输入电流的基波相位。
进一步地,通过以下公式计算占空比:
Figure PCTCN2019101695-appb-000008
其中,D为占空比,K2为升压系数。
在上述至少一个技术方案中,进一步地,在收集到所述占空比的数值为负值时,将所述占空比设置为0。
在该技术方案中,由于当电气负载,即压缩机以较低频率运行时,升压系数K2可能会小于1,而当K2小于1时,通过公式计算得到的占空比D的数值可能为负,此时将占空比设置为0。
在上述至少一个技术方案中,进一步地,控制模块还用于:确定供电信号对应的功率参数和电压参数,根据功率参数计算功率波动;根据功率波动确定对应的补偿功率;根据预设的补偿系数、补偿功率和电压参数计算补偿谐波信号。
在该技术方案中,压缩机控制的转矩电流分量为I q,叠加的转矩补偿电流为I qcom,则母线输出功率可通过下式表示:
Figure PCTCN2019101695-appb-000009
其中,P o为母线输出功率,p为压缩机的极对数,ω e为压缩机的运行角频率,k e为压缩机的反电动势常数。
由此,由于转矩补偿电流引起的母线功率波动可表示为:
Figure PCTCN2019101695-appb-000010
其中,P 为母线功率波动。
为了补偿上述功率波动,降低上述功率波动造成的母线电容上的电流波动,本申请通过压缩机的上述参数信息,以及母线上的供电信号的基波幅值确定对应的补偿谐波信号I Δ
而该转矩补偿电流会导致母线的电解电容上增加与压缩机运行机械频率同频率的电流波动,造成电解电容发热。因此通过压缩机的上述参数信息,以及母线上的供电信号的基波幅值确定对应的补偿谐波信号,并向PFC控制器输入与补偿谐波信号对应的占空比,以使PFC向母线中注入该补偿谐波信号I Δ,进而通过该补偿谐波信号I Δ补偿转矩补偿电流造成的电解电容上的电流波动,在注入补偿谐波信号I Δ后,母线上的交流输出功率可表示为:
P i=U msinθ×(I msinθ+I Δ);
其中,P i为母线交流输出功率,U m为基波电压幅值,I m为基波电流幅值。
其中,补偿功率可表示为:
P =U msinθ×I Δ
进一步地,根据功率平衡,可知P =P ,因此可以通过以下公式确定补偿谐波信号I Δ
Figure PCTCN2019101695-appb-000011
其中,p为压缩机的极对数,ω e为压缩机的运行角频率,k e为压缩机的反电动势常数,I qcom为转矩补偿电流,U m为基波电压幅值。
进一步地,可以在上式中增加补偿系数Ko,此时可以通过以下公式确定补偿谐波信号I Δ
Figure PCTCN2019101695-appb-000012
其中,0≤Ko≤1,当Ko取0时,不进行补偿,而当Ko取1时,进行完全补偿。
在上述至少一个技术方案中,进一步地,控制模块还用于:确定供电信号对应的升压系数;计算供电信号和补偿谐波信号的和以得到叠加信号;根据叠加信号、升压系数和基波幅值计算得到占空比。
在该技术方案中,在确定了补偿谐波信号后,进一步确定供电信号和补偿谐波信号的和以得到叠加信号,并根据母线电压幅值和供电信号中输入电压幅值的比值计算升压系数K,并通过以下公式计算对应的占空比:
Figure PCTCN2019101695-appb-000013
其中,D为占空比,I in为叠加信号,K为升压系数,I m为交流测基波电流幅值。
在上述至少一个技术方案中,进一步地,电气负载为压缩机;以及参数信息具体包括:压缩机的极对数、压缩机的运行角频率、压缩机的反电动势常数和压缩机的转矩补偿电流。
在该技术方案中,电气负载具体为压缩机,压缩机的参数信息包括:压缩机的极对数、压缩机的运行角频率、压缩机的反电动势常数和压缩机的转矩补偿电流。
本申请的第三方面提供了一种压缩机,该压缩机包括如上述至少一个技术方案中提供的运行控制系统,因此,该压缩机包括如上述至少一个技 术方案中提供的运行控制系统的全部有益效果。
本申请的第四方面提供了一种空调器,该空调器包括如上述至少一个技术方案中提供的运行控制系统和/或如上述至少一个技术方案中提供的压缩机,因此,该空调器包括上述至少一个技术方案中提供的运行控制系统和/或如上述至少一个技术方案中提供的压缩机的全部有益效果。
本申请的第五方面提供了一种计算机可读存储介质,其上存储有计算机程序,计算机程序被处理器执行时实现如上述至少一个技术方案中提供的运行控制方法,因此,该计算机可读存储介质包括如上述至少一个技术方案中提供的运行控制方法的全部有益效果。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解,其中:
图1示出了根据本申请的一个实施例的运行控制方法的流程图;
图2示出了根据本申请的一个实施例的供电控制电路的示意图;
图3(A)示出了根据本申请的一个实施例的供电控制电路母线输入电流和母线输出电流的示意图;
图3(B)示出了根据本申请的一个实施例的供电控制电路交流侧的供电信号基波中注入三次谐波信号的示意图;
图3(C)示出了根据本申请的一个实施例的供电控制电路交流侧的供电信号基波中注入五次谐波信号的示意图;
图3(D)示出了根据本申请的一个实施例的供电控制电路在注入了三次谐波信号后母线输入电流和对应的功率因数矫正控制器占空比的示意图;
图4示出了根据本申请的另一个实施例的运行控制方法的流程图;
图5示出了根据本申请的另一个实施例的供电控制电路的结构示意图;
图6示出了根据本申请的一个实施例的运行控制系统的框图。
具体实施方式
为了能够更清楚地理解本申请的上述目的、特征和优点,下面结合附 图和具体实施方式对本申请进行进一步的详细描述。需要说明的是,在不冲突的情况下,本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本申请,但是,本申请还可以采用其他不同于在此描述的其他方式来实施,因此,本申请的保护范围并不受下面公开的具体实施例的限制。
下面参照图1至图6描述根据本申请一些实施例所述运行控制方法、运行控制系统、压缩机、空调器和计算机可读存储介质。
如图1和图2所示,在本申请第一方面的实施例中,提供了一种运行控制方法,适用于供电控制电路,供电控制电路用于将母线的供电信号接入电气负载,供电控制电路中设有电连接的功率因数矫正控制器、主控板和电解电容。
其中,如图1所示,运行控制方法包括:
S102,收集母线的供电信号;
S104,确定供电信号对应的基波相位,并确定与基波相位对应的高次谐波信号;
S106,根据高次谐波信号确定输入至功率因数矫正控制器的占空比。
在该实施例中,实时收集设置有PCF控制器的供电电路的母线供电信号,根据母线供电信号确定对应的供电基波相位,并进一步确定与基波向对应的高次谐波信号,通过改变功率因数矫正控制器(即PFC控制器)的占空比,以通过功率因数矫正控制器向输入至母线的交流输入电流中注入高次谐波信号,通过高次谐波的叠加效果“削平”输入电流波形的峰值,使得母线电流峰值对应于下降。应用了本申请限定的技术方案,通过根据母线供电信号确定对应的高次谐波信号,通过控制PFC控制器的占空比向基波信号中注入高次谐波信号,进而使得输入至母线的交流电流的基波在高次谐波的叠加影响下降低幅值,进而降低母线的输入电流波动,使得母线电容不再需要通过强烈的充放电以维持电流稳定,因此可以有效的降低母线电容发热量,使得可以在不更换大容量母线电容、不增加硬件成本的情况下提升母线电容的可靠性和使用寿命。
具体地,针对一般的家用空调供电电路,如图2所示的供电控制电路, 在交流输入侧输入的电网电压,即市电电压为正弦波,并可通过下式表示:
U in=U m×sin(ωt);
其中,U in为交流测电网输入电压基波信号,U m为电网电压幅值,ωt表示电网输入电压的基波相位。
在PFC控制器的作用下,交流侧电流也会跟随交流电压呈正弦波,并可通过下式表达:
I in=I m×sin(ωt);
其中,I in为交流侧输入电流,I m为输入电流幅值,ωt表示输入电流的基波相位。
因此,交流侧的输入功率可通过下式表达:
Figure PCTCN2019101695-appb-000014
其中,P in为交流侧的输入功率。
由此可见,交流输入功率是随时间大幅波动的,且其波动频率为电网输入频率的两倍。而由于母线输出电流为无波动的直流电流,如图3(A)所示,因此为了补偿电流波动,会导致母线电容强烈充、放电,进而导致母线电容严重发热。为了解决上述问题,本申请通过控制PFC控制器的占空比,以通过PFC模块向母线交流侧的供电信号中注入高次谐波信号,具体可优选注入如图3(B)所示的三次谐波信号,或如图3(C)所示的五次谐波信号,通过高次谐波与交流侧基波的叠加降低流入母线的电流信号的幅值,进而降低母线的输入电流波动,从而使得母线电容不再需要通过强烈的充放电以维持电流稳定,有效降低母线电容发热。在确定所需注入的高次谐波信号后,根据高次谐波信号确定输入至功率因数矫正控制器的占空比,例如在注入了三次谐波信号后,对应的占空比具体如图3(D)所示。
或者,如图4所示,运行控制方法包括:
S402,获取电气负载的参数信息,并采集供电信号对应的基波幅值;
S404,确定参数信息和基波幅值对应的补偿谐波信号;
S406,根据补偿谐波信号确定输入至功率因数矫正控制器的占空比。
实时采集设置有PFC(Power Factor Correction,功率因数矫正)控制器的供电电路的母线供电信号,根据母线供电信号确定对应的供电基波幅 值,同时获取电气负载,即压缩机的参数信息;根据基波幅值确定与其相对应的补偿谐波信号,该补偿谐波信号与供电基波信号叠加后可补偿压缩机控制中叠加的转矩补偿电流,使得母线电容电流中,频率为压缩机运行机械频率的分量幅值减小。在确定了补偿谐波信号后,根据补偿谐波信号确定输入至功率因数矫正控制器的占空比,通过该占空比控制PFC控制器向母线注入补偿谐波信号。应用了本申请提供的技术方案,通过根据电路中电气负载的参数信息,以及供电信号的基波幅值需要确定向母线中注入的补偿谐波信号,并进一步通过向PFC控制器输入对应的占空比以控制PFC控制器向母线注入该补偿谐波信号,进而通过该补偿谐波信号补偿电气负载,如压缩机控制中叠加的转矩补偿电流,使得母线电容电流中,频率为压缩机运行机械频率的分量幅值减小,进而缓解母线电容的电流波动,降低母线电容的发热,增加母线电容的使用寿命。
具体地,如图5所示的供电控制电路设置有电连接的PFC控制器、主控芯片和设置在母线上的电解电容,供电控制电路用于为压缩机供电。在运行过程中,为了维持压缩机运行稳定,需要向压缩机注入转矩补偿电流,转矩补偿电流根据转速波动情况,在压缩机控制的转矩电流分量上叠加一个前馈的补偿量,从而使压缩机转速基本维持稳定,减小压缩机运行振动。因此本申请通过向母线中注入与压缩机的参数信息和供电信号的基波幅值对应的补偿谐波信号,通过向PFC控制器输入与补偿谐波信号对应的占空比,以通过PFC控制器向母线注入该补偿谐波信号,以消除转矩补偿电流给母线电容带来的电流波动,降低母线电容的发热量。
在本申请的一个实施例中,进一步地,确定与基波相位对应的高次谐波信号,具体为:确定供电信号对应的基波幅值和高次谐波信号对应的目标谐波幅值,计算目标谐波幅值的比值和基波幅值;根据比值、基波幅值和基波相位计算得到高次谐波信号。
在该实施例中,根据交流侧输入的基波确认所需注入的n次谐波信号,首先需要确定供电信号的基波幅值和高次谐波信号对应的目标谐波幅值I m,计算目标谐波幅值的比值和基波幅值K1,并通过以下公式计算对应的n次谐波信号:
I in=K1×I m×sin(nωt);
其中,I in为所述n次谐波信号,K1为目标谐波幅值的比值和基波幅值,且满足0≤K1≤1,n为高次谐波的谐波次数,具体为至少是2的自然数,ωt为基波相位。
优选地,n=3,高次谐波为三次谐波。
优选地,n=5,高次谐波为五次谐波。
在本申请的一个实施例中,进一步地,根据高次谐波信号确定输入至功率因数矫正控制器的占空比,具体包括:确定供电信号对应的升压系数;计算供电信号和高次谐波信号的和以得到叠加信号;根据叠加信号、升压系数和基波幅值计算得到占空比。
在该实施例中,根据电气负载,即压缩机的运行频率可以确定供电信号对应的升压系数,也可根据母线电压采样值和所接入的交流供电信号的电压幅值确定升压系数。同时根据以下公式计算叠加信号:
I in′=I m×sin(ωt)+K1×I m×sin(nωt);
其中,I in′为叠加信号,K1为目标谐波幅值的比值和基波幅值,I m为输入电流幅值,ωt表示输入电流的基波相位。
进一步地,通过以下公式计算占空比:
Figure PCTCN2019101695-appb-000015
其中,D为占空比,K2为升压系数。
在本申请的一个实施例中,进一步地,高次谐波信号为三次谐波信号,计算确定占空比的具体方法为:
在向交流侧输入的标准基正弦波信号中注入三次谐波后,母线电流输入信号可用下式表达:
I in=I m×sin(ωt)+K1×I m×sin(3ωt);
其中,I in为叠加后的母线电流输入信号,I m为输入电流的基波幅值,K1为注入的三次谐波幅值和基波幅值的比值,ωt表示输入电流的基波相位。
为了向交流侧输入的标准基正弦波信号中注入上式表达的三次谐波信号,PFC控制器的占空比D应为:
Figure PCTCN2019101695-appb-000016
其中,D为占空比,I in为叠加后的母线电流输入信号,I m为输入电流的基波幅值,K1为注入的三次谐波幅值和基波幅值的比值,ωt表示输入电流的基波相位,K2为升压系数。
在本申请的一个实施例中,进一步地,在收集到所述占空比的数值为负值时,将所述占空比设置为0。
在该实施例中,由于当电气负载,即压缩机以较低频率运行时,升压系数K2可能会小于1,而当K2小于1时,通过公式计算得到的占空比D的数值可能为负,此时将占空比设置为0。
在本申请的一个实施例中,进一步地,确定参数信息和基波幅值对应的补偿谐波信号,具体包括:确定供电信号对应的功率参数和电压参数,根据功率参数计算功率波动;根据功率波动确定对应的补偿功率;根据预设的补偿系数、补偿功率和电压参数计算补偿谐波信号。
在该实施例中,压缩机控制的转矩电流分量为I q,叠加的转矩补偿电流为I qcom,则母线输出功率可通过下式表示:
Figure PCTCN2019101695-appb-000017
其中,P o为母线输出功率,p为压缩机的极对数,ω e为压缩机的运行角频率,k e为压缩机的反电动势常数。
由此,由于转矩补偿电流引起的母线功率波动可表示为:
Figure PCTCN2019101695-appb-000018
其中,P 为母线功率波动。
为了补偿上述功率波动,降低上述功率波动造成的母线电容上的电流波动,本申请通过压缩机的上述参数信息,以及母线上的供电信号的基波幅值确定对应的补偿谐波信号I Δ
而该转矩补偿电流会导致母线的电解电容上增加与压缩机运行机械频率同频率的电流波动,造成电解电容发热。因此通过压缩机的上述参数信息,以及母线上的供电信号的基波幅值确定对应的补偿谐波信号,并向PFC控制器输入与补偿谐波信号对应的占空比,以使PFC向母线中注入该补偿谐波信号I Δ,进而通过该补偿谐波信号I Δ补偿转矩补偿电流造成的电解电容上的电流波动,在注入补偿谐波信号I Δ后,母线上的交流输出功率可表示为:
P i=U msinθ×(I msinθ+I Δ);
其中,P i为母线交流输出功率,U m为基波电压幅值,I m为基波电流幅值。
其中,补偿功率可表示为:
P =U msinθ×I Δ
进一步地,根据功率平衡,可知P =P ,因此可以通过以下公式确定补偿谐波信号I Δ
Figure PCTCN2019101695-appb-000019
其中,p为压缩机的极对数,ω e为压缩机的运行角频率,k e为压缩机的反电动势常数,I qcom为转矩补偿电流,U m为基波电压幅值。
进一步地,可以在上式中增加补偿系数Ko,此时可以通过以下公式确定补偿谐波信号I Δ
Figure PCTCN2019101695-appb-000020
其中,0≤Ko≤1,当Ko取0时,不进行补偿,而当Ko取1时,进行完全补偿。
在本申请的一个实施例中,进一步地,根据补偿谐波信号确定输入至功率因数矫正控制器的占空比,具体包括:确定供电信号对应的升压系数;计算供电信号和补偿谐波信号的和以得到叠加信号;根据叠加信号、升压系数和基波幅值计算得到占空比。
在该实施例中,在确定了补偿谐波信号后,进一步确定供电信号和补偿谐波信号的和以得到叠加信号,并根据母线电压幅值和供电信号中输入电压幅值的比值计算升压系数K,并通过以下公式计算对应的占空比:
Figure PCTCN2019101695-appb-000021
其中,D为占空比,I in为叠加信号,K为升压系数,I m为交流测基波电流幅值。
在本申请的一个实施例中,进一步地,电气负载为压缩机;以及参数信息具体包括:压缩机的极对数、压缩机的运行角频率、压缩机的反电动势常数和压缩机的转矩补偿电流。
在该技术方案中,电气负载具体为压缩机,压缩机的参数信息包括: 压缩机的极对数、压缩机的运行角频率、压缩机的反电动势常数和压缩机的转矩补偿电流。
如图6所示,在本申请第二方面的实施例中,提供了一种运行控制系统600,适用于供电控制电路,供电控制电路用于将母线的供电信号接入电气负载,供电控制电路中设有电连接的功率因数矫正控制器、主控板和电解电容,运行控制系统600包括:收集模块602和控制模块604。在一个实施例中,收集模块602用于收集母线的供电信号;控制模块604用于确定供电信号对应的基波相位,并确定与基波相位对应的高次谐波信号;以及根据高次谐波信号确定输入至功率因数矫正控制器的占空比。
在该实施例中,实时收集设置有PCF控制器的供电电路的母线供电信号,根据母线供电信号确定对应的供电基波相位,并进一步确定与基波向对应的高次谐波信号,通过改变功率因数矫正控制器(即PFC控制器)的占空比,以通过功率因数矫正控制器向输入至母线的交流输入电流中注入高次谐波信号,通过高次谐波的叠加效果“削平”输入电流波形的峰值,使得母线电流峰值对应于下降。应用了本申请限定的技术方案,通过根据母线供电信号确定对应的高次谐波信号,通过控制PFC控制器的占空比向基波信号中注入高次谐波信号,进而使得输入至母线的交流电流的基波在高次谐波的叠加影响下降低幅值,进而降低母线的输入电流波动,使得母线电容不再需要通过强烈的充放电以维持电流稳定,因此可以有效的降低母线电容发热量,使得可以在不更换大容量母线电容、不增加硬件成本的情况下提升母线电容的可靠性和使用寿命。
在另一个实施例中,收集模块602用于获取电气负载的参数信息,并采集供电信号对应的基波幅值;控制模块604用于确定参数信息和基波幅值对应的补偿谐波信号;以及根据补偿谐波信号确定输入至功率因数矫正控制器的占空比。
实时采集设置有PFC(Power Factor Correction,功率因数矫正)控制器的供电电路的母线供电信号,根据母线供电信号确定对应的供电基波幅值,同时获取电气负载,即压缩机的参数信息;根据基波幅值确定与其相对应的补偿谐波信号,该补偿谐波信号与供电基波信号叠加后可补偿压缩 机控制中叠加的转矩补偿电流,使得母线电容电流中,频率为压缩机运行机械频率的分量幅值减小。在确定了补偿谐波信号后,根据补偿谐波信号确定输入至功率因数矫正控制器的占空比,通过该占空比控制PFC控制器向母线注入补偿谐波信号。应用了本申请提供的技术方案,通过根据电路中电气负载的参数信息,以及供电信号的基波幅值需要确定向母线中注入的补偿谐波信号,并进一步通过向PFC控制器输入对应的占空比以控制PFC控制器向母线注入该补偿谐波信号,进而通过该补偿谐波信号补偿电气负载,如压缩机控制中叠加的转矩补偿电流,使得母线电容电流中,频率为压缩机运行机械频率的分量幅值减小,进而缓解母线电容的电流波动,降低母线电容的发热,增加母线电容的使用寿命。
在本申请的一个实施例中,进一步地,控制模块还用于:确定供电信号对应的基波幅值和高次谐波信号对应的目标谐波幅值,计算目标谐波幅值的比值和基波幅值;根据比值、基波幅值和基波相位计算得到高次谐波信号。
在该实施例中,根据交流侧输入的基波确认所需注入的n次谐波信号,首先需要确定供电信号的基波幅值和高次谐波信号对应的目标谐波幅值I m,计算目标谐波幅值的比值和基波幅值K1,并通过以下公式计算对应的n次谐波信号:
I in=K1×I m×sin(nωt);
其中,I in为所述n次谐波信号,K1为目标谐波幅值的比值和基波幅值,且满足0≤K1≤1,n为高次谐波的谐波次数,具体为至少是2的自然数,ωt为基波相位。
在本申请的一个实施例中,进一步地,控制模块还用于:根据高次谐波信号确定输入至功率因数矫正控制器的占空比,具体包括:确定供电信号对应的升压系数;计算供电信号和高次谐波信号的和以得到叠加信号;根据叠加信号、升压系数和基波幅值计算得到占空比。
在该实施例中,根据电气负载,即压缩机的运行频率可以确定供电信号对应的升压系数,也可根据母线电压采样值和所接入的交流供电信号的电压幅值确定升压系数。同时根据以下公式计算叠加信号:
I in′=I m×sin(ωt)+K1×I m×sin(3ωt);
其中,I in′为叠加信号,K1为目标谐波幅值的比值和基波幅值,I m为输入电流幅值,ωt表示输入电流的基波相位。
进一步地,通过以下公式计算占空比:
Figure PCTCN2019101695-appb-000022
其中,D为占空比,K2为升压系数。
在本申请的一个实施例中,进一步地,在收集到所述占空比的数值为负值时,将所述占空比设置为0。
在该实施例中,由于当电气负载,即压缩机以较低频率运行时,升压系数K2可能会小于1,而当K2小于1时,通过公式计算得到的占空比D的数值可能为负,此时将占空比设置为0。
在本申请的一个实施例中,进一步地,控制模块还用于:确定供电信号对应的功率参数和电压参数,根据功率参数计算功率波动;根据功率波动确定对应的补偿功率;根据预设的补偿系数、补偿功率和电压参数计算补偿谐波信号。
在该实施例中,压缩机控制的转矩电流分量为I q,叠加的转矩补偿电流为I qcom,则母线输出功率可通过下式表示:
Figure PCTCN2019101695-appb-000023
其中,P o为母线输出功率,p为压缩机的极对数,ω e为压缩机的运行角频率,k e为压缩机的反电动势常数。
由此,由于转矩补偿电流引起的母线功率波动可表示为:
Figure PCTCN2019101695-appb-000024
其中,P 为母线功率波动。
为了补偿上述功率波动,降低上述功率波动造成的母线电容上的电流波动,本申请通过压缩机的上述参数信息,以及母线上的供电信号的基波幅值确定对应的补偿谐波信号I Δ
而该转矩补偿电流会导致母线的电解电容上增加与压缩机运行机械频率同频率的电流波动,造成电解电容发热。因此通过压缩机的上述参数信息,以及母线上的供电信号的基波幅值确定对应的补偿谐波信号,并向PFC控制器输入与补偿谐波信号对应的占空比,以使PFC向母线中注入该补偿 谐波信号I Δ,进而通过该补偿谐波信号I Δ补偿转矩补偿电流造成的电解电容上的电流波动,在注入补偿谐波信号I Δ后,母线上的交流输出功率可表示为:
P i=U msinθ×(I msinθ+I Δ);
其中,P i为母线交流输出功率,U m为基波电压幅值,I m为基波电流幅值。
其中,补偿功率可表示为:
P =U msinθ×I Δ
进一步地,根据功率平衡,可知P =P ,因此可以通过以下公式确定补偿谐波信号I Δ
Figure PCTCN2019101695-appb-000025
其中,p为压缩机的极对数,ω e为压缩机的运行角频率,k e为压缩机的反电动势常数,I qcom为转矩补偿电流,U m为基波电压幅值。
进一步地,可以在上式中增加补偿系数Ko,此时可以通过以下公式确定补偿谐波信号I Δ
Figure PCTCN2019101695-appb-000026
其中,0≤Ko≤1,当Ko取0时,不进行补偿,而当Ko取1时,进行完全补偿。
在本申请的一个实施例中,进一步地,控制模块还用于:确定供电信号对应的升压系数;计算供电信号和补偿谐波信号的和以得到叠加信号;根据叠加信号、升压系数和基波幅值计算得到占空比。
在该实施例中,在确定了补偿谐波信号后,进一步确定供电信号和补偿谐波信号的和以得到叠加信号,并根据母线电压幅值和供电信号中输入电压幅值的比值计算升压系数K,并通过以下公式计算对应的占空比:
Figure PCTCN2019101695-appb-000027
其中,D为占空比,I in为叠加信号,K为升压系数,I m为交流测基波电流幅值。
在本申请的一个实施例中,进一步地,电气负载为压缩机;以及参数信息具体包括:压缩机的极对数、压缩机的运行角频率、压缩机的反电动势常数和压缩机的转矩补偿电流。
在该实施例中,电气负载具体为压缩机,压缩机的参数信息包括:压缩机的极对数、压缩机的运行角频率、压缩机的反电动势常数和压缩机的转矩补偿电流。
在本申请第三方面的实施例中,提供了一种压缩机,该压缩机包括如上述至少一个实施例中提供的运行控制系统,因此,该压缩机包括如上述至少一个实施例中提供的运行控制系统的全部有益效果。
在本申请第四方面的实施例中,提供了一种空调器,该空调器包括如上述至少一个实施例中提供的运行控制系统和/或如上述至少一个实施例中提供的压缩机,因此,该空调器包括上述至少一个实施例中提供的运行控制系统和/或如上述至少一个实施例中提供的压缩机的全部有益效果。
在本申请第五方面的实施例中,提供了一种计算机可读存储介质,其上存储有计算机程序,计算机程序被处理器执行时实现如上述至少一个实施例中提供的运行控制方法,因此,该计算机可读存储介质包括如上述至少一个实施例中提供的运行控制方法的全部有益效果。
本申请的描述中,术语“多个”则指两个或两个以上,除非另有明确的限定,术语“上”、“下”等指示的方位或位置关系为基于附图所述的方位或位置关系,仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制;术语“连接”、“安装”、“固定”等均应做广义理解,例如,“连接”可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是直接相连,也可以通过中间媒介间接相连。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请的描述中,术语“一个实施例”、“一些实施例”、“具体实施例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或特点包含于本申请的至少一个实施例或示例中。在本申请中,对上述术语的示意性表述不一定指的是相同的实施例或实例。而且,描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述仅为本申请的优选实施例而已,并不用于限制本申请,对于本领域的技术人员来说,本申请可以有各种更改和变化。凡在本申请的精 神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。

Claims (17)

  1. 一种运行控制方法,适用于供电控制电路,所述供电控制电路用于将母线的供电信号接入电气负载,所述供电控制电路中设有电连接的功率因数矫正控制器、主控板和电解电容,其中,所述运行控制方法包括:
    收集所述母线的供电信号;
    确定所述供电信号对应的基波相位,并确定与所述基波相位对应的高次谐波信号;
    根据所述高次谐波信号确定输入至所述功率因数矫正控制器的占空比;或
    获取所述电气负载的参数信息,并采集所述供电信号对应的基波幅值;
    确定所述参数信息和所述基波幅值对应的补偿谐波信号;
    根据所述补偿谐波信号确定输入至所述功率因数矫正控制器的占空比。
  2. 根据权利要求1所述的运行控制方法,其中,所述确定与所述基波相位对应的高次谐波信号,具体为:
    确定所述供电信号对应的基波幅值和所述高次谐波信号对应的目标谐波幅值,计算所述基波幅值和所述目标谐波幅值的比值;
    根据所述比值、所述基波幅值和所述基波相位计算得到所述高次谐波信号。
  3. 根据权利要求2所述的运行控制方法,其中,所述根据所述高次谐波信号确定输入至所述功率因数矫正控制器的占空比,具体包括:
    确定所述供电信号对应的升压系数;
    计算所述供电信号和所述高次谐波信号的和以得到叠加信号;
    根据所述叠加信号、所述升压系数和所述基波幅值计算得到所述占空比。
  4. 根据权利要求3所述的运行控制方法,其中,在收集到所述占空比的数值为负值时,将所述占空比设置为0。
  5. 根据权利要求1所述的运行控制方法,其中,所述确定所述参数信息和所述基波幅值对应的补偿谐波信号,具体包括:
    确定所述供电信号对应的功率参数和电压参数,根据所述功率参数计算功率波动;
    根据所述功率波动确定对应的补偿功率;
    根据预设的补偿系数、所述补偿功率和所述电压参数计算所述补偿谐波信号。
  6. 根据权利要求5所述的运行控制方法,其中,所述根据所述补偿谐波信号确定输入至所述功率因数矫正控制器的占空比,具体包括:
    确定所述供电信号对应的升压系数;
    计算所述供电信号和所述补偿谐波信号的和以得到叠加信号;
    根据所述叠加信号、所述升压系数和所述基波幅值计算得到所述占空比。
  7. 根据权利要求6所述的运行控制方法,其中,所述电气负载为压缩机;以及
    所述参数信息具体包括:所述压缩机的极对数、所述压缩机的运行角频率、所述压缩机的反电动势常数和所述压缩机的转矩补偿电流。
  8. 一种运行控制系统,适用于供电控制电路,所述供电控制电路用于将母线的供电信号接入电气负载,所述供电控制电路中设有电连接的功率因数矫正控制器、主控板和电解电容,其中,所述运行控制系统包括:
    收集模块,用于收集所述母线的供电信号;
    控制模块,用于确定所述供电信号对应的基波相位,并确定与所述基波相位对应的高次谐波信号;以及
    根据所述高次谐波信号确定输入至所述功率因数矫正控制器的占空比;
    所述收集模块用于获取所述电气负载的参数信息,并采集所述供电信号对应的基波幅值;
    所述控制模块用于确定所述参数信息和所述基波幅值对应的补偿谐波信号;以及
    根据所述补偿谐波信号确定输入至所述功率因数矫正控制器的占空比。
  9. 根据权利要求8所述的运行控制系统,其中,所述控制模块还用于:
    确定所述供电信号对应的基波幅值和所述高次谐波信号对应的目标谐波幅值,计算所述基波幅值和所述目标谐波幅值的比值;
    根据所述比值、所述基波幅值和所述基波相位计算得到所述高次谐波信号。
  10. 根据权利要求9所述的运行控制系统,其中,所述控制模块还用于:
    确定所述供电信号对应的升压系数;以及
    计算所述供电信号和所述高次谐波信号的和以得到叠加信号;
    根据所述叠加信号、所述升压系数和所述基波幅值计算得到所述占空比。
  11. 根据权利要求10所述的运行控制系统,其中,所述控制模块还用于:
    在收集到所述占空比的数值为负值时,将所述占空比设置为0。
  12. 根据权利要求8所述的运行控制系统,其中,所述控制模块还用于:
    确定所述供电信号对应的功率参数和电压参数,根据所述功率参数计算功率波动;
    根据所述功率波动确定对应的补偿功率;
    根据预设的补偿系数、所述补偿功率和所述电压参数计算所述补偿谐波信号。
  13. 根据权利要求12所述的运行控制系统,其中,所述控制模块还用于:
    确定所述供电信号对应的升压系数;
    计算所述供电信号和所述补偿谐波信号的和以得到叠加信号;
    根据所述叠加信号、所述升压系数和所述基波幅值计算得到所述占空比。
  14. 根据权利要求13所述的运行控制系统,其中,所述电气负载为压缩机;以及
    所述参数信息具体包括:所述压缩机的极对数、所述压缩机的运行角频率、所述压缩机的反电动势常数和所述压缩机的转矩补偿电流。
  15. 一种压缩机,其中,所述压缩机包括如权利要求8至14中任一项所述的运行控制系统。
  16. 一种空调器,其中,所述空调器包括如权利要求8至14中任一项所述的运行控制系统;和/或
    如权利要求15所述的压缩机。
  17. 一种计算机可读存储介质,其上存储有计算机程序,其中,所述计算机程序被处理器执行时实现如权利要求1至7中任一项所述的运行控制方法。
PCT/CN2019/101695 2018-11-30 2019-08-21 运行控制方法及系统、压缩机、空调器和可读存储介质 WO2020107956A1 (zh)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201811458686.3A CN111256275B (zh) 2018-11-30 2018-11-30 运行控制方法及系统、压缩机和空调器
CN201811458686.3 2018-11-30
CN201811460137.XA CN111256281B (zh) 2018-11-30 2018-11-30 运行控制方法及系统、压缩机和空调器
CN201811460137.X 2018-11-30

Publications (1)

Publication Number Publication Date
WO2020107956A1 true WO2020107956A1 (zh) 2020-06-04

Family

ID=70852265

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/101695 WO2020107956A1 (zh) 2018-11-30 2019-08-21 运行控制方法及系统、压缩机、空调器和可读存储介质

Country Status (1)

Country Link
WO (1) WO2020107956A1 (zh)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101087103A (zh) * 2007-04-13 2007-12-12 珠海格力电器股份有限公司 直流电源装置、提高其功率因数及调节其输出电压的方法
KR20120090406A (ko) * 2011-02-07 2012-08-17 엘지전자 주식회사 리액터, 리액터를 포함한 모터 제어 장치 및 모터 제어 장치를 포함한 공기 조화기
CN102857087A (zh) * 2012-09-17 2013-01-02 海信(山东)空调有限公司 一种功率因数自适应控制方法
CN103516191A (zh) * 2012-06-29 2014-01-15 珠海格力电器股份有限公司 功率因数校正方法、电路以及开关电源
CN104113262A (zh) * 2013-10-16 2014-10-22 广东美的制冷设备有限公司 一种变频空调及其基于z源变换器的电机控制系统
CN104242628A (zh) * 2014-09-03 2014-12-24 广东美的制冷设备有限公司 Ac-dc变换器的pfc控制方法、装置和空调器
CN105515354A (zh) * 2016-01-22 2016-04-20 珠海格力节能环保制冷技术研究中心有限公司 用于控制压缩机的方法,装置和系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101087103A (zh) * 2007-04-13 2007-12-12 珠海格力电器股份有限公司 直流电源装置、提高其功率因数及调节其输出电压的方法
KR20120090406A (ko) * 2011-02-07 2012-08-17 엘지전자 주식회사 리액터, 리액터를 포함한 모터 제어 장치 및 모터 제어 장치를 포함한 공기 조화기
CN103516191A (zh) * 2012-06-29 2014-01-15 珠海格力电器股份有限公司 功率因数校正方法、电路以及开关电源
CN102857087A (zh) * 2012-09-17 2013-01-02 海信(山东)空调有限公司 一种功率因数自适应控制方法
CN104113262A (zh) * 2013-10-16 2014-10-22 广东美的制冷设备有限公司 一种变频空调及其基于z源变换器的电机控制系统
CN104242628A (zh) * 2014-09-03 2014-12-24 广东美的制冷设备有限公司 Ac-dc变换器的pfc控制方法、装置和空调器
CN105515354A (zh) * 2016-01-22 2016-04-20 珠海格力节能环保制冷技术研究中心有限公司 用于控制压缩机的方法,装置和系统

Similar Documents

Publication Publication Date Title
CN111256281B (zh) 运行控制方法及系统、压缩机和空调器
CN104320032B (zh) 一种交‑交变频空调控制方法及控制器
CN106605359B (zh) 电力变换装置
US20120320641A1 (en) Power converter bus control
CN108809073B (zh) Apfc电路电压的控制方法、控制系统及空调器
WO2016050045A1 (zh) 一种变频空调控制方法
CN106803721B (zh) 永磁同步电机驱动系统无电解电容功率变换器及控制方法
CN107388661A (zh) 太阳能空调系统及其功率控制方法和装置
EP2232666A1 (en) Harmonic filter with integrated power factor correction
CN104953854A (zh) 变频空调器及其室外机的电源电路和pfc控制方法
CN111869069A (zh) 功控电容器电路及其控制方法
CN109004883A (zh) 一种小电容电机驱动系统的母线电压低压区控制方法
CN109347121A (zh) 基于同步整流器的下垂控制方法及低电压穿越方法
CN109546913A (zh) 一种电容小型化电机驱动装置
CN110829563B (zh) 基于比例谐振控制的复用充电机二次谐波抑制方法
CN104315651B (zh) 一种单相变频空调控制方法及控制器
CN111256275B (zh) 运行控制方法及系统、压缩机和空调器
CN104811028B (zh) 功率因数校正电路
CN101010989B (zh) 感应加热装置
CN102684513B (zh) 不间断电源及其整流电路
Facchinello et al. Closed-loop operation and control strategy for the dual active half bridge ac-ac converter
WO2020107956A1 (zh) 运行控制方法及系统、压缩机、空调器和可读存储介质
CN108683208A (zh) 一种提高光伏储能逆变器并联稳定性的方法
JP2022543904A (ja) ビークル-グリッド-ホーム電力インターフェース
CN108199409B (zh) 一种燃料电池发电系统的电流脉动抑制方法

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: 19888638

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19888638

Country of ref document: EP

Kind code of ref document: A1