CN101388557B - Insulated gate bipolar transistor uninterruptible power supply system - Google Patents
Insulated gate bipolar transistor uninterruptible power supply system Download PDFInfo
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
- H03K7/08—Duration or width modulation ; Duty cycle modulation
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Abstract
The invention relates to an insulated gate bipolar transistor uninterruptible power supply system, which monitors whether an input power supply is output to a load side swimmingly through a microprocessor, built-in cells are charged through an inverter in a process of inputting a stable power, the input power supply is shadowed when detecting unstable power supply input, DC voltage after being charged is converted to AC voltage through a DC-AC converter, output power supply is provided to the load side in a ceaseless way, thereby protecting working data and stably finishing the system connected to the load side, but the input power supply is still unstable or in a state of power filaure after providing the stable power supply for certain time, the system connected to the load side is forced to close through the microprocessor and an output shadowing unit.
Description
Technical field
The present invention relates to a kind of insulated gate bipolar transistor uninterruptible power supply (IGBTUPS:insulated gate bipolar transistor uninterruptible power supply) system; What be particularly related to is that a kind of insulated gate bipolar transistor uninterruptible power supply system of the present invention can be imported power supply through microprocessor monitors and whether outputs to load-side swimmingly; In the process of input stabilized power supply, pass through inverter to built-in battery charge; Detect and cover above-mentioned input power supply when unsettled power supply is imported; Through the converting direct-current voltage into alternating-current voltage after the charging of DC/AC inverter handle; Supply out-put supply with no hit mode to load-side; Thereby the protection operational data also stably finishes to be connected to the system of load-side, and the input power supply is still unstable or when keeping power down mode behind the stabilized power supply of supply certain hour, forces the system that is connected to load-side to finish through microprocessor and output shielding cell.
Background technology
Medium-and-large-sized information processor is when the power failure accident of the class that takes place to have a power failure; Usually can utilize uninterruption power source feeding mechanism (Uninterrupted Power Supply; Hereinafter to be referred as " UPS ") continue power supply, thus can prevent when the emergency of the class that takes place to have a power failure that operational data from losing.
Therefore, uninterruption power source feeding mechanism (UPS) need be installed, so that also can continue as the computer power supply during power supply supply discontinuity of Utilities Electric Co. as the computer system that giant brain performs important duties.
In addition, PC (PC) also need dispose UPS for fear of in operation process, suffering a loss because have a power failure, but existing UPS expensive, bulky and need extra installing space not only, and use also inconvenient.Yet, make people office and family need generally increase owing to the height of PC is general with property recently to above-mentioned UPS with application.
AVR (Automatic Voltage Regulator) exports after can becoming burning voltage to the caused irregular voltage transitions of the change of input voltage; Common and the above-mentioned UPS of said apparatus uses and the multinomial functions such as compensation and voltage-regulation that have a power failure of performance simultaneously together, and the function integrate type product quilt that therefore has above-mentioned UPS and an AVR is developed one by one and emerged.
Fig. 1 and Fig. 2 are the calcspars of the UPS/AVR composite power source device of prior art.
Shown in Figure 1, the UPS/AVR composite power source device of prior art comprises: A/D converter (4) can convert the mains ac power supply to DC power supply; D/A inverter (7) is fed to load-side after can converting above-mentioned DC power supply to AC power; Charger (5) converts above-mentioned mains supply to and makes battery (BATT) charging behind the direct current; DC-DC transducer (6) can be kept fixed voltage; Synchronous diverter switch portion (8) for the unusual or overload state of above-mentioned D/A inverter (7), optionally is supplied to external system after converting the AC power of mains ac power supply or D/A inverter (7) to output AC power source; And CPU (1), keep watch on the action of importing power supply and controlling above-mentioned synchronous diverter switch portion (8).Among the figure 2 is can pilot cell (BATT) charged state and the front panel of content such as power supply supply status, and 3 and 9 is noise filters, and D is a diode.
Action in the face of above-mentioned existing UPS/AVR composite power source device further specifies down.
At first, the mains ac power supply through input terminal input will be converted into DC power supply through A/D converter (4) when regular event, then a plurality of batteries (BATT) on the charger (5) are charged.The DC power supply of above-mentioned A/D converter (4) is fed to external system through synchronous diverter switch portion (8) with a plurality of lead-out terminals after being converted to AC power by D/A inverter (7) again.At this moment, DC-DC transducer (6) is regulated low-voltage and overvoltage with following the prescribed order, exports after becoming burning voltage to the irregular voltage transitions that change caused of input voltage.
Under above-mentioned state; If the mains ac power supply has a power failure; The DC power supply of battery (BATT) of above-mentioned setting voltage of having charged will pass through DC-DC transducer (6) and be converted into AC power with diode (D) at D/A inverter (7); Be supplied to external system through synchronous diverter switch portion (8) then, make described external system under the external condition that has a power failure, be able to stably work.
Again during the incoming transport commercial power, charger (5) will charge to battery (BATT) again in above-mentioned action.
Above-mentioned D/A inverter (7) takes place when unusual; CPU (1) will detect described unusual and be fed to external system to the interchange direct bypass of commercial power (bypass) through the change action of synchronous diverter switch portion (8); At this moment, the user can learn according to the accumulate pond state of front panel (2) and take place unusually.
A computer system also has equipment such as computer body, display, printer, digital quantizer, hub, draught machine and externally positioned type modulator-demodulator; Wherein some equipment needs offset supply when having a power failure; Some equipment does not then need offset supply, and the equipment that also has is vulnerable to the injury of irregular power supply, possesses UPS and AVR function simultaneously if therefore have the prior art of said structure; Just needn't purchase UPS and AVR in addition separately, practice thrift acquisition expenses thereby benefit.
Yet, when considering, will find that existing uninterrupted power supply(ups) has not only reduced the efficient of line with the angle of line, also cause harmonic noise and power factor distortion etc. to diminish various phenomenons in the power circuit reliability.Especially recently the harmonic current that causes because of the increase of condenser type load has caused the obstacle in power plant, and the peak power problem also is a growing tension, need seek countermeasure to the problem of uninterrupted power supply(ups) itself on the contrary.
If the angle with load-side considers, the output distortion rate of uninterrupted power supply(ups) will produce harmful effect and hinder in high-quality power supply supply peripheral equipment when nonlinear load, need fundamentally address the above problem.
In order to address the above problem, people have developed the uninterrupted power supply that can prevent the outage of output voltage and more not receive the external electrical environmental impact, below in conjunction with Fig. 2 another existing uninterrupted power supply(ups) are further specified.
Shown in Figure 2; The UPS/AVR composite power source device of prior art comprises the following units: first transformer (513); Output to load-side to input power supply through primary winding, can after the output of input is controlled, output to load-side to correspondence from input switch (511); Filter circuit (514) is controlled the voltage/current of the secondary coil of above-mentioned first transformer (513), can control the output of its load-side to the input of above-mentioned first transformer (513); First inverter (515) can be controlled the voltage and the electric current of above-mentioned filter circuit (514); Battery (516) can be supplied uninterruption power source; Second inverter (517) outputs to load-side after becoming AC power to above-mentioned battery (516) power source conversion during power failure, just often after load-side is accepted above-mentioned input power supply and converted DC power supply to, above-mentioned battery (516) is charged; Second transformer (518); Be connected between the output loading side of above-mentioned second inverter (517) and above-mentioned first transformer (513); Just often output to above-mentioned second inverter (517) side to the load-side out-put supply at power supply, then output to above-mentioned load-side to the out-put supply of above-mentioned second inverter (517) during power failure; Fast detecting unit (80); Detect input voltage (Vi) and input current (iS) respectively in above-mentioned input switch (511) rear end; Link in above-mentioned load-side detects output voltage (VO) and output current (iP); Detect direct voltage (Vd) at above-mentioned battery (516), under the situation that is not postponed, can arrive detection signal through CT and PT fast detecting by resistance circuit; Microprocessor (90); After receiving input/output voltage, electric current and the direct voltage that is detected above-mentioned fast detecting unit (80); Set various functions through key plate input mode, can carry out and do not have a power failure controlled function and automatism voltage control (AVR) function and control various supervision, indication and defencive function; Door chip for driving (gatedriver) (70) is exported the pwm control signal of above-mentioned first inverter (515) and above-mentioned second inverter (517) according to the pwm control signal of above-mentioned microprocessor (90); Key plate (100) allows operating personnel to carry out various function settings, keeps watch on operations such as control and set point control; And LCD (110), can indicate various states, related menu and indicative of settings value can also be provided when set-up function.
And the composite power source device with said structure is connected through a SCR (512) between above-mentioned input switch (511) and load line in order to control overcurrent.
Therefore, when above-mentioned SCR (512) broken string maybe can't be brought into play its function, uninterruptible power system also can't detect the overcurrent on the uninterruptible power system with uncontrollable overcurrent and unusual generation when normal operation.
Summary of the invention
In order to solve the above-mentioned shortcoming of prior art, the object of the invention is following.
The first, a kind of uninterrupted power supply is provided; Use master controller as microprocessor; All functions in the generation that comprises generation and the bypass electric semiconductor switch pulse signal of inverter PWM equals are all by software implementation; Use the key plate to set the also various correlated variabless of memory system, thereby realize multifunction.
The second, a kind of uninterrupted power supply is provided,, handles, more do not receive the influence and the separable operation of electric external environment condition through the mode that 8-BITPIC microcontroller and master controller communicate for the processing and the control of keeping watch on LCD of key plate input signal.
Three, a kind of online uninterrupted power supply is provided, uses the line voltage distribution Fast Detection Technique under the situation that the corresponding output voltage of line voltage distribution does not cut off the power supply, to export, exempt switching time.
Four, a kind of uninterrupted power supply is provided, under regular link voltage through circuit the energy efficient rate be supplied to load, inverter then to generate almost identical voltage and charge to deal with contingent abnormal voltage with line voltage distribution.
Five, a kind of uninterrupted power supply is provided, when the SCR broken string maybe can't be brought into play its function, can controls the overcurrent and the anomaly of uninterruptible power system, when normal operation, also can detect the overcurrent on the uninterruptible power system.
The present invention is in order to solve above-mentioned problem, as insulated gate bipolar transistor uninterruptible power supply system, can have both the AVR function in order to improve the efficient when being in line voltage distribution as much as possible; As uninterrupted power supply(ups), the inverter function can be controlled in addition software implementation to all functions, so provide have high efficiency, High Power Factor (power factor) and H.D uninterruptible power system.
And, in the uninterrupted power supply function aspects, can detect and measure the out-put supply that flows to load-side or control its output so that out-put supply is smooth and easy.
Uninterrupted power supply of the present invention comprises the following units: 1a, 1b import shielding cell, connect mains supply and battery respectively; The input switch unit, the amphicheirality SCR that also can be controlled above-mentioned input power supply overcurrent by the efferent that is connected in series to above-mentioned 1a input shielding cell constitutes; First transformer outputs to load-side to the input power supply from above-mentioned input switch unit through primary winding, can after the output of input is controlled, output to load-side to correspondence; Filter circuit is controlled the voltage/current of the secondary coil of above-mentioned first transformer, can be to its corresponding output of input control of above-mentioned first transformer; First inverter; The efferent that connects above-mentioned filter circuit; Control voltage, electric current and frequency can protective circuits when class unusual of overload, short circuit and electric leakage takes place, and pass through IGBT pulse-width modulation (PWM) control mode when load change takes place to load-side power supply stably; Battery is connected to above-mentioned 1b input shielding cell and supplies uninterruption power source; Second inverter outputs to load-side after converting above-mentioned battery supply to AC power during power failure, after just often accepting above-mentioned input power supply and convert DC power supply to from load-side to above-mentioned battery charge; Second transformer; Be connected between above-mentioned second inverter and the 1b output switch unit; Power supply just often outputs to above-mentioned second inverter to the out-put supply of load-side, then outputs to above-mentioned load-side to the out-put supply of above-mentioned second inverter through above-mentioned 1b output switch unit during power failure; 1a, 1b export switch unit, and the amphicheirality SCR that is connected to the efferent of above-mentioned second transformer or above-mentioned input shielding cell by amphicheirality SCR constitutes, and control flows is to the overcurrent of the interchange out-put supply of load-side; 1a exports shielding cell, is connected in series to the efferent of above-mentioned 1a output switch unit, can supply stream to the interchange out-put supply of above-mentioned load-side; 1b exports shielding cell; The input part that artificial by-pass switch (MBS) is parallel-connected to above-mentioned 1a input shielding cell and the efferent of above-mentioned 1a output shielding cell to be cutting off the electricity supply fully, can when the fault restoration of uninterrupted power supply or the state of emergency, avoid uninterrupted power supply to move; The fast detecting unit; Detect input voltage (Vi) and input current (iS) respectively in above-mentioned input switch unit rear end; Link in above-mentioned load-side detects output voltage (VO) and output current (iP); At above-mentioned battery detecting direct voltage (Vd), under the situation that is not postponed, can pass through current transformer (CT by resistance circuit; Current transformer) with transformer (PT; Potential transformer) fast detecting is to detection signal; Microprocessor; After receiving input/output voltage, electric current and the direct voltage that is detected above-mentioned fast detecting unit; Set various functions through key plate input mode, can carry out and do not have a power failure controlled function and automatism voltage control (AVR) function and control various supervision, indication and defencive function; The door chip for driving is exported pulse-width modulation (PWM) control signal of above-mentioned first inverter and above-mentioned second inverter according to pulse-width modulation (PWM) control signal of above-mentioned microprocessor; The key plate allows operating personnel to carry out various function settings, keeps watch on operations such as control and set point control; And display part (LCD), can indicate various states, related menu and indicative of settings value can also be provided when set-up function.
Above-mentioned microprocessor comprises: the output voltage control unit, and control above-mentioned first inverter in order to carry out the AVR function and control the secondary coil of first transformer and then control output voltage through filter circuit; The battery charge control unit can be controlled the charging voltage and the charging current of above-mentioned battery; The line voltage distribution monitor unit is kept watch on input and output voltage, so carry out relevant indication control with controlled function such as alarm control; Pattern related setting unit can store and manage various pattern related setting values; Main control unit is controlled above-mentioned each unit, selective system service conditions and is tried, alarms functions such as control, the various defencive functions of control and bypass out; The PWM generation unit, the control of accepting above-mentioned main control unit according to the controlled function of above-mentioned each unit generates the pwm signal of the door that can control above-mentioned first inverter and above-mentioned second inverter and outputs to above-mentioned door chip for driving.
The 8-bit microcontroller that can handle key plate input and have an indication control function use as i/o controller and with above-mentioned microprocessor communication, thereby make above-mentioned key plate and display part (LCD) have independently controller.
Above-mentioned 1b output switch unit is parallel-connected to the efferent of above-mentioned 1a input shielding cell and the efferent of above-mentioned 1a output switch unit to its amphicheirality SCR, can detect, measure and control to the out-put supply that flows to load-side.
Above-mentioned 1a, 1b output switch unit uses amphicheirality SCR control overcurrent, when transformer, switch, cover device, rectifying device, charging device and inverter and obstacle occurs and cause the uninterrupted power supply function can be to load-side power supply stably can't regular event the time.
Description of drawings
Fig. 1 is the calcspar of the UPS/AVR composite power source device of prior art;
Fig. 2 is the schematic circuit diagram of the UPS/AVR composite power source device of another prior art;
Fig. 3 is the uninterruptible power system structure chart of preferred embodiment of the present invention;
Fig. 4 is a functional block diagram within the microprocessor shown in Figure 1;
Fig. 5 is the schematic circuit diagram of the uninterruption power source supply system of uninterruptible power system of the present invention;
Fig. 6 a is the power supply route key diagram of uninterruptible power system of the present invention under each pattern to Fig. 6 f;
Fig. 7 is the key plate of uninterruptible power system of the present invention and the control panel exemplary graph of LCD.
Description of reference numerals: 10-first transformer; 94-battery charge control unit; 12-imports switch unit; 95-line voltage distribution monitor unit; 20-filter circuit (Filter Circuit); 96-pattern related setting unit; 30-first inverter; 100-key plate; The 40-battery; 110-LCD; 50-second inverter; The 120-i/o controller; 60-second transformer; 211-1a imports shielding cell; 70-door chip for driving (gate driver); 212-1b imports shielding cell; 80-fast detecting unit; 213-1a exports shielding cell; The 90-microprocessor; 214-1b exports shielding cell; The 91-PWM generation unit; 311-1a exports switch unit; 92-output voltage control unit; 312-1b exports switch unit; The 93-main control unit.
Embodiment
Describe preferred embodiment of the present invention in detail with reference to accompanying drawing below.
Fig. 3 is the uninterruptible power system structure chart of preferred embodiment of the present invention; Fig. 4 is a functional block diagram within the microprocessor shown in Figure 3; Fig. 5 is the schematic circuit diagram of the uninterruption power source supply system of uninterruptible power system of the present invention; Fig. 6 a is the power supply route key diagram of uninterruptible power system of the present invention under each pattern to Fig. 6 f, and Fig. 7 is the key plate of uninterruptible power system of the present invention and the control panel exemplary graph of LCD.
Fig. 3 is to shown in Figure 5; Insulated gate bipolar transistor uninterruptible power supply system of the present invention connects civil power (not shown) power supply and accepts alternating current input power supplying through 1a input shielding cell (211), connects battery (40) and accepts direct-current input power supplying through 1b input shielding cell (212).At this moment, the change action that above-mentioned 1b input shielding cell (212) can cover/connect just often using the power supply from load-side that above-mentioned battery (40) is charged, then can output to load-side to above-mentioned battery (40) power supply during power failure.
Be connected in series to the efferent that above-mentioned 1a imports shielding cell (211) to input switch unit (12), be connected in series to above-mentioned input switch unit (12) to first transformer (10).At this moment, above-mentioned input switch unit (12) should be controlled the overcurrent of importing power supply by described use amphicheirality SCR.
Above-mentioned first transformer (10) outputs to load-side to the input power supply from above-mentioned input switch unit (12) through primary winding, can after the output of input is controlled, output to load-side to correspondence.
Be connected to the secondary coil of above-mentioned first transformer (10) to filter circuit (20), can control for the relevant voltage/electric current of the input of above-mentioned first transformer (10) and and then control its output.
Through being connected to first inverter (30) control voltage, electric current and the frequency of above-mentioned filter circuit (20); Can protective circuit when class unusual of overload, short circuit and electric leakage takes place, when taking place, passes through load change IGBT pulse-width modulation (PWM) control mode to load-side power supply stably.
Above-mentioned battery (40) connects above-mentioned 1b input shielding cell (212) and supplies uninterruption power source.Just often use power supply that above-mentioned battery (40) is charged, then output to load-side to above-mentioned battery (40) power supply during power failure from load-side.
Be connected in series to and output to load-side after second inverter (50) of above-mentioned first inverter (30) can be when above-mentioned power-off condition becomes AC power to above-mentioned battery (40) power source conversion, after just often then accepting above-mentioned input power supply and convert DC power supply to from load-side to above-mentioned battery charge.
Be connected in series to second transformer (60) between above-mentioned second inverter (50) and the 1b output switch unit (311).At this moment; Above-mentioned second transformer (60) should describedly just often output to above-mentioned second inverter (50) to the load-side out-put supply at power supply, then outputs to above-mentioned load-side to the out-put supply of above-mentioned second inverter (50) through above-mentioned 1b output switch unit (311) during power failure.
Use amphicheirality SCR to be connected to 1a output switch unit (311) or 1b output switch unit (312) to the efferent of above-mentioned second transformer (60) or above-mentioned input shielding cell (211).At this moment, above-mentioned 1a, 1b output switch unit (311,312) can control flows to the overcurrent of the interchange out-put supply of load-side.And; Above-mentioned 1b output switch unit (312) is parallel-connected to the efferent of above-mentioned 1a input shielding cell (211) and the efferent of above-mentioned 1a output switch unit (311) to its amphicheirality SCR, can detect, measure and control to the out-put supply that flows to load-side.
Above-mentioned 1a, 1b export switch unit (311; 312) use amphicheirality SCR control overcurrent, when transformer, switch, cover device, rectifying device, charging device and inverter and obstacle occurs and cause the uninterrupted power supply function can be can't regular event the time to load-side power supply stably.
At this moment, 1a output shielding cell (213) be connected in series to above-mentioned 1a output switch unit (311) efferent and can supply stream to the interchange out-put supply of above-mentioned load-side.
At this moment; The input part that artificial by-pass switch (MBS) is parallel-connected to above-mentioned 1a input shielding cell (211) and the efferent of above-mentioned 1a output shielding cell (213) to be cutting off the electricity supply fully, can when the fault restoration of uninterrupted power supply or the state of emergency, avoid uninterrupted power supply to move.
In addition; Also comprise: fast detecting unit (80); Efferent at above-mentioned 1a input shielding cell (211) detects input voltage (Vi) and input current (iS) respectively; Link in above-mentioned load-side detects output voltage (VO) and output current (iP), detects direct voltage (Vd) at above-mentioned battery (40), under the situation that is not postponed by resistance circuit, can pass through CT and PT fast detecting to detection signal; Microprocessor (90); After receiving input/output voltage, electric current and the direct voltage that is detected above-mentioned fast detecting unit (80); Set various functions through key plate input mode, can carry out and do not have a power failure controlled function and automatism voltage control (AVR) function and control various supervision, indication and defencive function; Door chip for driving (70) is exported the pwm control signal of above-mentioned first inverter (30) and above-mentioned second inverter (50) according to the pwm control signal of above-mentioned microprocessor (90); Key plate (100) allows operating personnel to carry out various function settings, keeps watch on operations such as control and set point control; And LCD (110), can indicate various states, related menu and indicative of settings value can also be provided when set-up function.
Though the accompanying drawing of this specification does not have expression can detect the transformer (PT of the electric current and voltage of input and output; Potential Transformer) with current transformer (CT; Current Transformer) device such as, however the above-mentioned detection operation of uninterruptible power system circuit is very tangible for same industry personage, therefore omits in order to simplify accompanying drawing.
To walk abreast on the opposite side power line of mode in two power lines of above-mentioned first transformer (10) SCR of input switch unit (12) is installed, the operation of the class that makes microprocessor (90) be able to control promptly to cover.
In addition, above-mentioned microprocessor (90) is controlled Core Feature of the present invention through program (Program), and Fig. 4 has represented above-mentioned functions with square.
Above-mentioned microprocessor (90) comprising: output voltage control unit (92); Control above-mentioned first inverter (30) in order to carry out automatism voltage control (AVR) function and pass through the secondary coil that filter circuit (20) is controlled first transformer (10), and then control output voltage; Battery charge control unit (94) can be controlled the charging voltage and the charging current of above-mentioned battery (40); Line voltage distribution monitor unit (95) is kept watch on input and output voltage, so carry out relevant indication control with controlled function such as alarm control; Pattern related setting unit (96) can store and manage various pattern related setting values; Main control unit (93) is controlled above-mentioned each unit, selective system service conditions and is tried, alarms functions such as control, the various defencive functions of control and bypass out; PWM generation unit (91), the control of accepting above-mentioned main control unit (93) according to the controlled function of above-mentioned each unit generates the pwm signal of the door (gate) that can control above-mentioned first inverter (30) and above-mentioned second inverter (50) and outputs to above-mentioned door chip for driving (70).
Shown in Figure 5; Above-mentioned key plate and LCD (100; When 110) using independently controller; As shown in Figure 3ly use the 8-bit microcontroller as i/o controller (120) and communicate by letter, can form independent structures, can also make its key plate of sharing microprocessor import processing capacity and indication control function with above-mentioned microprocessor (90).
Explanation has the effect of the present invention and the effect of said structure below.
The present invention can bring into play uninterrupted power supply(ups) function and AVR function simultaneously, through the master control mode of software implementation in addition, realizes the H.D online uninterrupted power supply of high efficiency.In order to improve the efficient of available (Avaliable) line voltage distribution as much as possible, inverter will be carried out the AVR function with buffer voltagc between control output and the input, be controlled at fixed voltage to output voltage, and output power is then by line feed.All functions are all by software implementation, and each correlated variables and memory through key plate initialization system.
At first, the circuit in conjunction with Fig. 3 and Fig. 5 describes basic procedure.Behind 1a input shielding cell (211) and input switch unit (12) acceptance input power supply (Vi), through the primary winding load-side output of first transformer (10).At this moment, the voltage and the electric current of the secondary coil through above-mentioned first transformer of filter circuit (20) control (10), and then control output voltage (Vo) and carry out the AVR function.
Above-mentioned filter circuit (20) is accepted the control of first inverter (30), and first inverter (30) then carries out PWM control by microprocessor (90).At this moment, through above-mentioned first inverter (30) control voltage, electric current and frequency, can protective circuit when class unusual of overload, short circuit and electric leakage takes place, the phase angle of change SCR and to load-side power supply stably when load change takes place.
At this moment, only allow above-mentioned direct voltage to charge through 1b input shielding cell (212) and to battery (40) through conversion.At this moment, above-mentioned battery (40) is connected to above-mentioned 1b input shielding cell (212) and supplies uninterruption power source.
That is to say; When the input power supply is in power down mode; Through microprocessor (90) control above-mentioned second inverter (50); Convert the DC power supply of above-mentioned battery (40) to AC power, be fed to the output loading side through second transformer (60), 1a output switch unit and 1a output shielding cell then, accomplish action as uninterrupted power supply(ups).
PWM control can carrying out inverter sine voltage of the present invention control; Though its control mode is more complicated than existing bipolar PWM mode; Can make ripple voltage reduce about 2 times one pole (unipolar) PWM mode but used, and in the internal processes of microprocessor shown in Figure 4 (90), control by PWM generation unit (91).The sine wave freuqency that inverter is exported can be set through key plate (100), also can take different numerical with line frequency.That is to say; Fast detecting unit (80) is when detecting input voltage (Vi); Zero passage (Zero crossing) through voltage detects frequency; If incoming frequency is different with output frequency, controls PWM in order to meet the output frequency of having set and adjust to the frequency of having set to output frequency automatically.
Output voltage control unit (92) can be controlled to making the output voltage that measures keep consistent automatism voltage control (Automatic voltage regulator:AVR) function with the benchmark output voltage, in order to obtain with stability voltage control and output current to be compensated control for the response of load.Detect input voltage and input current, output voltage and output current through above-mentioned fast detecting unit (80); Perform calculations processing and make output current consistent with the output voltage of setting; Above-mentioned first inverter (30) is carried out PWM control; And then at secondary coil voltage and electric current through filter circuit (20) above-mentioned first transformer of control (10), output voltage and output current are compensated, carry out the AVR function.
Battery charge control unit (94) can be carried out the floating charge that always is charged to general floating charging voltage (float charging voltage); Be charged to the equalization charging of maximum charging voltage when recharging after also can carrying out installation for the first time or discharging into battery low-voltage, charging current is limited in the maximum charging current always.During impartial the charging,, then get into the floating charge pattern if charging current is below 10% of maximum charging current value.
The control mode of charging current does; Calculate the virtual value electric current and detect battery charge through the difference of input current and output current; Be limited in during charging in the maximum charging current value; To reduce charging current through the fixed voltage controlled function when reaching fully charged state, the charging current response is then by the decision of charging ride gain.Aspect the temperature-compensating of impartial charging voltage, temperature hangs down and when normal temperature, improves charging voltage, and the temperature height then reduces charging voltage when normal temperature.When temperature height during at normal temperature, positive temperature-compensating mode is used in temperature-compensating; When temperature hanged down at normal temperature, cloudy temperature-compensating mode was used in temperature-compensating.
Line voltage distribution monitor unit (95) rely on the difference of line voltage distribution and normal voltage judge line voltage distribution normally whether, described value will start inverter during greater than set point.Through supervision and control, when detection line voltage, can use hysteresis voltage to eliminate the frequent switching phenomenon between circuit operation and the invertor operation at the step-down warning value of line voltage distribution to input voltage.
During to whether the detecting unusually of line voltage distribution; Can use the susceptibility of constant detection time (Time Constant) the reduction line voltage distribution of line voltage distribution; When the frequency of line voltage distribution surpassed designated value allow excursion the time, will not carry out the circuit operation and operated inverter and export only with cell voltage.
That is to say that monitoring voltage is the applicable system hysteresis voltage, using system voltage time constant reduces frequent variation, if exceed system exception frequency or system exception voltage, does not then use the line voltage distribution operation and operated inverter only.Do not use line voltage distribution operation and only the meaning of operated inverter do; Rely on the control of microprocessor (90) and cover SCR (12) and prevent and be supplied to output loading, start second inverter (50) and convert the charge power supply of battery (40) AC power to and output to load-side output voltage (Vo) as the line voltage distribution of input voltage.
Pattern related setting unit (96) can be provided with various set points, and the menu selection operation through key plate (100) is provided with and stores various set points.Aspect selection function, can select to use system's running frequency of 60Hz or 50Hz, through inverter battery is discharged fully after relay tip terminal (a contact and the b contact) operational mode of operational system and control board whether automatically during incoming line voltage again.Accept numerical value or output during numerical value in order to finely tune (Fine calibration) from analogue data, if conversion gain is incorrect, then can cause error, and then need regulate conversion gain again at processor.
Can regulate this moment in fine setting (Fine calibration) parameter, the mensuration gain that the mensuration gain that cell voltage gain can regulating cell voltage, the mensuration gain that output voltage gain can be regulated output voltage, mensuration gain that the output current gain can be regulated output current, mensuration gain that the charging current gain can be regulated charging current and input voltage gain can be regulated input voltage.Above-mentioned variable can be presented on the LCD (120) through output-current rating.When output voltage gain increases, the value that under line mode, is presented at LCD will increase, and under the fixed voltage control of inverter pattern, will reduce.
Main control unit (93) is not only controlled above-mentioned each unit, can also control PWM generation unit (91) according to the controlled function of each unit, and then is in fact carrying out the master control function of uninterruptible power system.
Alarm function buzzer when regular link voltage does not ring, under unusual line voltage distribution during the startup inverter then buzzer ring.Buzzer will be crossed situation such as low and difference according to caused unusual, the battery electric quantity of invertor operation, defencive function.
During the inverter action buzzer will be rung, and press the alarm silence switch of key plate (100) and then do not ring, then ring again by described switch again.When being in abnormality, buzzer will continue to ring; It or not abnormality and just during the moment overload, buzzer will continue to ring, and will stop sound but eliminate the overload state; When stopping, also can ringing uninterruptible power system.
Defencive function can be through defencive function control battery low-voltage state, overcurrent, overload, battery is unusual and phenomenon such as bypass overcurrent, below will be to its action of above-mentioned state description.
Battery low-voltage state, cell voltage discharge into rated voltage 85% and send the battery low-voltage signal can't maintain feasible value to output voltage the time.At this moment, be at most 30 seconds the running time of inverter, when under the battery low-voltage state, having repaired line voltage distribution, will recover normal operation.
Overcurrent condition, in the invertor operation process, output current is because the overcurrent that makes unusually of load condition continues to surpass at 300% o'clock, the suspension system in order to protect inverter.
The overload state for protection inverter under the overload state, when output current during greater than rated current, is set the amount that overload can accumulate if surpassed in one minute, just it is judged as overload.
The battery abnormality, in the invertor operation process, cell voltage discharges into 85% o'clock of rated voltage and will send abnormal signal and end inverter.If battery is still open when accepting the input power supply, then warn battery unusual, will continue operated inverter this moment and after connecting battery, return to normal condition.
The bypass overcurrent condition in the line voltage distribution running, when output short-circuit or generation need protection by-pass switch unusually, will be closed (OFF) by-pass switch.The fiducial value of abnormal current is the overcurrent value.
Function of initializing comprises fault (fault) initialization, parameter initialization and system initialization; The failure logging that takes place before the fault initialization can be removed also gets into SBR, and parameter initialization then returns to acquiescence (Defult) value to all variablees or selection function.During system initialization with restarting systems.
In addition, when key plate and LCD used independently controller, the 8-bit microcontroller that configuration as shown in Figure 3 can be communicated by letter with microprocessor (90) used as i/o controller (120).As shown in Figure 7; Have control panel that the key plate and the LCD of absolute construction constituted and disposed state diagram and 2 LED that can display system flow in the upper end, comprise that expression input power supply normal " Line ", expression are by " Inverter " of invertor operation, " Bypass ", " Fault " and " Overload " that representes system exception that expression input power supply is supplied as output.
Aspect the configuration of LCD (110), the overall condition of uninterrupted power supply has been shown in first tabulation, and secondary series has been represented the various built-in variables of uninterrupted power supply.Can show contents such as cell voltage capacity, cell voltage, battery current, output voltage, output current, input voltage, input current, output frequency, temperature, state indication, frequency of power cut, date and time, can use the key up and down of key plate (100) to read selective value.
" Mode " of key plate (100) can allow to pass in and out menu; Move position that can control variables; Moving up and down key can increase and decrease variable numerical value, change the variable on menu kind and the display part; What ALARM can change alarm opens/closes (ON/OFF) state, and " O " and " I " can select, set variable, termination or operational system to menu, restarting systems when fault.
By the uninterruptible power system of the present invention that microprocessor drove of carrying out above-mentioned functions can the control circuit operation, invertor operation and bypass, its state like Fig. 6 a to shown in Fig. 6 f.
Regular event is the circuit operational mode; The input power supply is supplied to load-side shown in Fig. 6 a; Control the secondary coil of first transformer (10) and only control the AVR function through first inverter (30) and filter circuit (20); According to second inverter (50) function battery (40) is charged, this is normal operation.
The action that has a power failure does, when shown in Fig. 6 b, detecting the power down mode of input power supply, controls second inverter (50) and outputs to load-side to the power supply of battery (40), and this is the invertor operation pattern.
Have a power failure to repair and do; Input is supplied to load-side shown in Fig. 6 c; Through second inverter battery (40) is taked the charge mode action from the power supply of outlet side feedback; Through the secondary side of first inverter (30), move to normal through the AVR functional rehabilitation with filter circuit (20) control first transformer (10).
Bypass can be controlled following function, is shown in like Fig. 6 d under the situation of control inverter not, under the situation that promptly uninterrupted power supply is failure to actuate, makes the input power supply be directly transferred to the bypass functionality of load-side.
Urgent bypass does; Shown in Fig. 6 e, possessed the artificial by-pass switch (MBS) parallelly connected with uninterruptible power system of the present invention; The input power supply is supplied to load-side through described emergency switch; The action of covering through to SCR makes power supply be unable to supply the uninterrupted power supply side fully, can when the fault restoration of uninterrupted power supply or other emergency, avoid the uninterrupted power supply operation.
Under overload or device abnormality, shown in Fig. 6 f, do not get into the invertor operation pattern yet, make the input power supply be fed to load-side through bypass path automatically, under the inner unaffordable situation of uninterruptible power system, take described operational mode usually.
Preamble combines preferred embodiment that the present invention is specified; But in technological thought category of the present invention; Can detailed description according to the present invention realize various distortion and modification; This is very tangible same industry personage, so the foregoing description can not limit the present invention, and the real interest field of the present invention should determine according to the technological thought of claim scope and equivalence range thereof.
Claims (5)
1. insulated gate bipolar transistor uninterruptible power supply system is characterized in that: comprising:
1a input shielding cell connects mains supply, and 1b input shielding cell connects battery;
The input switch unit is made up of efferent that is connected in series to above-mentioned 1a input shielding cell and the amphicheirality SCR that controls the input power supply overcurrent of above-mentioned 1a input shielding cell;
First transformer outputs to load-side to the input power supply from above-mentioned input switch unit through primary winding, after the output of the input power supply of above-mentioned input switch unit is controlled, outputs to load-side to correspondence;
Filter circuit is controlled the voltage/current of the secondary coil of above-mentioned first transformer, controls above-mentioned first transformer to the input of above-mentioned first transformer and exports accordingly;
First inverter connects the efferent of above-mentioned filter circuit, control voltage, electric current and frequency, and protective circuit when overload, short circuit and electric leakage take place is passed through IGBT pulse-width modulation (PWM) control mode to load-side power supply stably when load change takes place;
Battery is connected to above-mentioned 1b input shielding cell and supplies uninterruption power source;
Second inverter, the power source conversion of during power failure supplying above-mentioned battery outputs to load-side after becoming AC power, after just often accepting to output to the input power supply of load-side and to convert DC power supply to from load-side to above-mentioned battery charge;
Second transformer; Be connected between above-mentioned second inverter and the 1b output switch unit; Power supply just often outputs to above-mentioned second inverter to the out-put supply of load-side, then outputs to above-mentioned load-side to the out-put supply of above-mentioned second inverter through above-mentioned 1b output switch unit during power failure;
1a, 1b export switch unit, are made up of the amphicheirality SCR of efferent that is connected to above-mentioned second transformer or above-mentioned 1a input shielding cell, and control flows is to the overcurrent of the interchange out-put supply of load-side;
1a exports shielding cell, is connected in series to the efferent of above-mentioned 1a output switch unit, and supply stream is to the interchange out-put supply of above-mentioned load-side;
1b exports shielding cell; The input part that artificial by-pass switch is parallel-connected to above-mentioned 1a input shielding cell and the efferent of above-mentioned 1a output shielding cell to be cutting off the electricity supply fully, when the fault restoration of uninterrupted power supply or the state of emergency, avoids uninterrupted power supply to move;
The fast detecting unit; Detect input voltage and input current respectively in above-mentioned input switch unit rear end; Link in above-mentioned load-side detects output voltage and output current; At above-mentioned battery detecting direct voltage, under the situation that is not postponed, arrive detection signal through current transformer and transformer fast detecting by resistance circuit;
Microprocessor; After receiving input/output voltage, electric current and the direct voltage that is detected above-mentioned fast detecting unit; Set various functions through key plate input mode, carry out and not have a power failure controlled function and automatism voltage control function and to control various supervision, indication and defencive function;
The door chip for driving is exported the pulse-width modulation control signal of above-mentioned first inverter and above-mentioned second inverter according to the pulse-width modulation control signal of above-mentioned microprocessor;
The key plate allows operating personnel to carry out various function settings, keeps watch on control and set point control; And
Display part is indicated various states, and related menu and indicative of settings value also are provided when set-up function.
2. insulated gate bipolar transistor uninterruptible power supply system according to claim 1 is characterized in that:
Above-mentioned microprocessor comprises:
The output voltage control unit is controlled above-mentioned first inverter and is controlled the secondary coil of first transformer and then control output voltage through filter circuit in order to carry out the automatism voltage control function;
The battery charge control unit is controlled the charging voltage and the charging current of above-mentioned battery;
The line voltage distribution monitor unit is kept watch on input and output voltage, and then carries out relevant indication control and warning control;
Pattern related setting unit stores and manages various pattern related setting values;
Main control unit is controlled above-mentioned output voltage control unit, above-mentioned battery charge control unit, above-mentioned line voltage distribution monitor unit, above-mentioned pattern related setting unit, selective system service conditions and is tried, alarms control, the various defencive functions of control and bypass out; And
The pulse-width signal generation unit, the control of accepting above-mentioned main control unit according to the controlled function of above-mentioned output voltage control unit, above-mentioned battery charge control unit, above-mentioned line voltage distribution monitor unit and above-mentioned pattern related setting unit generates the pulse-width signal of the door of controlling above-mentioned first inverter and above-mentioned second inverter and outputs to above-mentioned door chip for driving.
3. insulated gate bipolar transistor uninterruptible power supply system according to claim 1 and 2; It is characterized in that: the 8-bit microcontroller of handling the input of key plate and having an indication control function use as i/o controller and with above-mentioned microprocessor communication, thereby make above-mentioned key plate and display part have independently controller.
4. insulated gate bipolar transistor uninterruptible power supply system according to claim 1 is characterized in that:
Above-mentioned 1b output switch unit is parallel-connected to the efferent of above-mentioned 1a input shielding cell and the efferent of above-mentioned 1a output switch unit to its amphicheirality SCR, detects, measures and control to the out-put supply that flows to load-side.
5. insulated gate bipolar transistor uninterruptible power supply system according to claim 1 is characterized in that:
Above-mentioned 1a, 1b output switch unit uses amphicheirality SCR control overcurrent, when transformer, switch, cover device, rectifying device, charging device and inverter obstacle appears and cause uninterrupted power supply can't regular event the time to load-side power supply stably.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2007-0092355 | 2007-09-12 | ||
| KR1020070092355A KR100830351B1 (en) | 2007-09-12 | 2007-09-12 | Insulated gate bipolar transistor uninterruptible power supply system |
| KR1020070092355 | 2007-09-12 |
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| CN101388557A CN101388557A (en) | 2009-03-18 |
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| CN2007101516192A Expired - Fee Related CN101388557B (en) | 2007-09-12 | 2007-09-24 | Insulated gate bipolar transistor uninterruptible power supply system |
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| CN101877486B (en) * | 2009-04-30 | 2013-04-10 | 比亚迪股份有限公司 | Battery energy storage power station used for balancing power network load |
| US8803361B2 (en) * | 2011-01-19 | 2014-08-12 | Schneider Electric It Corporation | Apparatus and method for providing uninterruptible power |
| KR101246048B1 (en) * | 2011-07-29 | 2013-04-03 | 이플러스주식회사 | System for uninterruptible power supply |
| US9479011B2 (en) * | 2013-12-05 | 2016-10-25 | General Electric Company | Method and system for a dual conversion uninterruptible power supply |
| CN103647278B (en) * | 2013-12-18 | 2016-04-20 | 国家电网公司 | A kind of Large Copacity Unified Power disturbing generating device |
| KR101643705B1 (en) * | 2015-09-11 | 2016-07-29 | 성신전기공업(주) | Apparatus and method for controlling ups |
| JP6436028B2 (en) * | 2015-09-17 | 2018-12-12 | 住友電気工業株式会社 | Power supply device and switch control method thereof |
| CN106712272A (en) * | 2015-11-18 | 2017-05-24 | 中国移动通信集团设计院有限公司 | Uninterrupted power source system |
| GB2546117B (en) * | 2016-01-11 | 2021-11-24 | Tridonic Gmbh & Co Kg | Emergency lighting unit with AC power charging |
| KR102643465B1 (en) | 2017-01-17 | 2024-03-05 | 삼성디스플레이 주식회사 | Display device and driving method thereof |
| WO2018163397A1 (en) * | 2017-03-10 | 2018-09-13 | 東芝三菱電機産業システム株式会社 | Uninterruptible power supply unit and uninterruptible power supply unit test method |
| CN108494039B (en) * | 2018-04-02 | 2024-03-22 | 惠州三华工业有限公司 | Standby power supply battery management system |
| KR101959776B1 (en) * | 2018-07-12 | 2019-03-19 | 국제통신공업 | Uninterruptible power supply system |
| JP2023534687A (en) * | 2020-07-16 | 2023-08-10 | ファーウェイ デジタル パワー テクノロジーズ カンパニー リミテッド | Battery assembly and energy storage system |
| KR102510108B1 (en) | 2022-11-04 | 2023-03-14 | 주식회사 이온 | Uninterruptible power supply |
| CN116111714B (en) * | 2023-04-11 | 2023-07-07 | 浙江德塔森特数据技术有限公司 | Uninterruptible power supply, control method and device thereof and readable medium |
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| CN2530378Y (en) * | 2002-01-10 | 2003-01-08 | 赵海 | Network controlling UPS |
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| KR100284050B1 (en) * | 1998-12-09 | 2001-03-02 | 김진한 | Serial parallel uninterruptible power supply (UPS) and control method of this device |
| KR100665540B1 (en) * | 2006-06-14 | 2007-01-09 | 국제통신공업 주식회사 | All igbt ups system for input/output three phases |
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