CN203491916U - Generator electric energy regeneration utilization device - Google Patents
Generator electric energy regeneration utilization device Download PDFInfo
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- CN203491916U CN203491916U CN201320564605.4U CN201320564605U CN203491916U CN 203491916 U CN203491916 U CN 203491916U CN 201320564605 U CN201320564605 U CN 201320564605U CN 203491916 U CN203491916 U CN 203491916U
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Abstract
The utility model relates to the electrical control technical field, and specifically relates to a generator electric energy regeneration utilization device comprising a PWM rectification unit used for rectifying AC current generated by generator aging test into DC voltage, and an inversion unit used for inverting the DC voltage into AC voltage and returning the AC voltage to power grid. The electric energy generated by the generator in the aging test passes a breaker QFA and a filter inductor in sequence, then is connected into three sets of IGBT switch tubes connected in parallel in a three phase rectification circuit, and is rectified by the three phase rectification circuit ZL and converted into stable DC voltage; the DC voltage is inverted into AC voltage by an invertor NB; the AC voltage is boosted by a step up transformer, processed and optimized by a filter circuit, and finally returned to the power grid. The generator electric energy regeneration utilization device employs PWM high frequency rectification technology; AC side line current waveform is very close to sine wave, only small amount of harmonic wave component is contained, and power factor is 1.
Description
Technical field
The utility model relates to Electrical Control Technology field, specifically relates to a kind of generator electric energy regeneration device.
Background technology
At present, the electric energy producing when generator test is aging, thereby generally adopt ohmic load, by electric energy, the form with heat consumes, this mode of operation has greatly caused the waste of electric energy.
At present, the commutation technique that conventional electric energy regeneration device adopts be generally to adopt the rectifier being comprised of phase controlled thyristors to carry out rectification, but this technology has following drawback:
1), the occasion such as common electric energy regeneration application of installation elevator, power is smaller, is not suitable for applying to the occasions such as high-power generator.
2), the rectifier that forms of phase controlled thyristors, in switching process, produce a large amount of harmonic components, electrical network and input source are produced and are polluted, cause the decline of the quality of power supply.
Utility model content
For the technical problem existing in prior art, the utility model provides a kind of generator electric energy regeneration device, this device by the aging electric energy feedback of generator test to electrical network, effective saves energy.Meanwhile, added PWM commutation technique, be effectively reduced in switching process the quality of power supply that the causes present situation that declines and be not easy to control, the harmonic component in electrical network is reduced as much as possible, to optimize power utilization environment.
To achieve these goals, the technical scheme of employing is: generator electric energy regeneration device, comprising:
PWM rectification unit, forms direct voltage for the AC rectification that generator ageing test is produced;
Inversion unit, for direct voltage is reverse into alternating voltage, and is fed back to electrical network.
Traditional stagnant ring control technology, turning on and off of power device is only relevant with the comparable situation between interior circular current, causes switching frequency to fix; If hysteresis band diminishes, the opening of power device turn-offed frequency and can be uprised, and finally makes power device stress very large, and switching loss does not reach ideal range.
Meanwhile, traditional stagnant ring control technology is not high for input voltage measured value accuracy, and control effect becomes and is not very desirable; The inaccuracy of input voltage measured value, directly has influence on current value, finally affects the control function of system; The instruction current of some phase in input voltage also exists uneven horizontal, affects conversely the instruction current of system.
What the utility model adopted is the PWM high-frequency rectification technology of controlling based on hysteresis current, the cardinal principle of this technology is in the running of device, in real time continual actual current and instruction electric current is compared: when actual current is greater than stagnant ring higher limit (instruction current and hysteresis band sum), go up brachium pontis open-minded, actual current reduces; When actual current is less than stagnant ring lower limit (instruction current and hysteresis band poor), descend brachium pontis open-minded, actual current increases.By above-mentioned dynamic control method, actual current can be stabilized in a relatively fixing scope.In stagnant chain rate process, the continual state that instruction current value is kept to tracking of actual current value, its numerical value is always in a state constantly fluctuating up and down.Due to instruction current and input voltage maintenance same-phase, therefore, in the process of actual current trace command electric current, realized the tracking of actual current to input voltage phase, thereby realized the control requirement of high power factor.
Further, described PWM rectification unit includes rectified three-phase circuit ZL, the alternating current that generator ageing test produces accesses be respectively in parallel in rectified three-phase circuit ZL three groups totally six IGBT switching tube (T1 by circuit breaker Q FA, T2, T3, T4, T5, T6), in, in every group of IGBT switching tube, upper and lower two switching tubes form the upper and lower bridge arm of IGBT.
Further, this device also includes active inversion electric energy feedback control unit, described active inversion electric energy feedback control unit includes DSP central processing unit, described DSP central processing unit is integrated with for detection of the sinusoidal wave direction of electric energy in electrical network and to the synchronization signal unit of DSP central processing unit transmission detection signal, for controlling rectified three-phase circuit ZL IGBT switching tube to turn-off to realize rectified three-phase circuit ZL input electric current be sinusoidal wave and power factor (PF) being 1 and the adjustable virtual protection circuit of rectified three-phase circuit ZL output end voltage value, for gathering galvanic electric current and the voltage signal of changing through rectified three-phase circuit ZL and by virtual protection circuit, whole electric energy regeneration device being carried out the current/voltage detecting unit of over-current over-voltage protection.
Further, on the circuit between described circuit breaker Q FA and rectified three-phase circuit ZL, be provided with the filter inductance (L1, L2, L3) for transferring energy and balance phase voltage.
Further, described inversion unit includes inverter NB, and the every of inverter NB forms by upper and lower bridge arm, and upper brachium pontis adopts HCPL-3120 driving power module, and lower brachium pontis adopts HCPL-316J driving power module.
Further, in the DC circuit between described PWM rectification unit and inverter NB, be provided with filter capacitor Cdc.
Further, on the circuit between described inversion unit and electrical network, be provided with 300V/420V step-up transformer T.
Further, on circuit between described step-up transformer and electrical network, be provided with filter unit, filter unit is by the filter inductance (L4 being placed on three-phase circuit, L5, L6), A.C. contactor KM, grid-connected contactor QF and be parallel to N phase and the filter capacitor (C1 of each L between mutually, C2, C3) form, the output of filter unit accesses electrical network mutually through L1 phase, L2 phase, L3 phase and N.
Generator electric energy regeneration device of the present utility model, compared with prior art, its beneficial effect shows:
1), the PWM high-frequency rectification technology that adopts compares with the phase controlled thyristors rectifier of current routine, AC line current waveform approaches sinusoidal wave very much, only contains a small amount of harmonic component, power factor (PF) is 1.
2), active inversion electric energy feedback control unit controlled by DSP central processing unit, realize fast, in real time, the control of high reliability; Adopt PWM high-frequency rectification technology, to reduce the loss of higher harmonic current.Power inversion circuit in system adopts the gate-drive of high power device and optimization and overcurrent, short circuit, under-voltage and overheating protection circuit, has effectively improved performance and the functional reliability of inverter circuit, has reduced system cost, has shortened product development cycle.
3), installation cost is low, reliability is high, conversion efficiency is high, the current sinusoidal degree of device output is high, harmonic content is low, can large-scale popularization use, to improve the utilization ratio of electric energy.
Accompanying drawing explanation
Fig. 1 is electrical schematic diagram of the present utility model.
Embodiment
For the ease of it will be appreciated by those skilled in the art that below in conjunction with accompanying drawing, the utility model is further described.As a kind of preferred embodiment of the present utility model, refer to Fig. 1, the electric energy that during ageing test, generator produces is successively through in circuit breaker Q FA, filter inductance L1, L2, L3 access PWM rectification unit, PWM rectification unit includes rectified three-phase circuit ZL, in rectified three-phase circuit ZL, be provided be in parallel three groups in totally six IGBT switch transistor T 1, T2, T3, T4, T5, T6, in every group of IGBT switching tube, upper and lower two switching tubes form the upper and lower bridge arm of IGBT.
Owing to existing, instantaneous drive current is large, the particularity such as reliability requirement height, power device at present similar electrical energy recovery device can not meet instructions for use of the present utility model, and the power model that PWM rectification unit of the present utility model adopts is PM800HSA120.
Active inversion electric energy feedback control unit includes DSP central processing unit, DSP central processing unit is integrated with for detection of the sinusoidal wave direction of electric energy in electrical network and to the synchronization signal unit of DSP central processing unit transmission detection signal, for controlling rectified three-phase circuit ZL IGBT switching tube to turn-off to realize rectified three-phase circuit ZL input electric current be sinusoidal wave and power factor (PF) being 1 and the adjustable virtual protection circuit of rectified three-phase circuit ZL output end voltage value, for gathering galvanic electric current and the voltage signal of changing through rectified three-phase circuit ZL and by virtual protection circuit, whole electric energy regeneration device being carried out the current/voltage detecting unit of over-current over-voltage protection.
In addition, in the DC circuit between the inverter NB of PWM rectification unit and inversion unit, be provided with filter capacitor Cdc.
The every of inverter NB forms by upper and lower bridge arm, and lower brachium pontis adopts HCPL-316J driving power module, lower brachium pontis driver HCPL-316J driver only need a non-isolation+15V power supply, there is higher dv/dt capacity; Can realize interlocking up and down, avoid two IGBT of same brachium pontis simultaneously open-minded; Resistance outside is adjustable, and the IGBT of different capacity can be operated under higher switching frequency, and obtains high conversion efficiency.Upper brachium pontis adopts HCPL-3120 driving power module, and upper brachium pontis driver HCPL-3120 output circuit has tolerance operating voltage range, makes it that driving voltage that provides gated devices required is provided.
On circuit between inversion unit and electrical network, be provided with 300V/420V step-up transformer T and filter unit, filter unit is by being placed in filter inductance L4, L5, L6, A.C. contactor KM, the grid-connected contactor QF on three-phase circuit and being parallel to N phase and filter capacitor C1, C2, the C3 of each L between mutually forms, and the output of filter unit accesses electrical network mutually through L1 phase, L2 phase, L3 phase and N.
The electric energy that during ageing test, generator produces is successively through in three groups of IGBT switching tubes that are in parallel in circuit breaker Q FA, filter inductance L1, L2, L3 access rectified three-phase circuit ZL, rectification through rectified three-phase circuit ZL makes it convert galvanic current pressure to, direct voltage is reverse into interchange through inverter NB again, then by step-up transformer, boost, after optimizing finally by filter circuit processing, be fed back to electrical network.
The synchronization signal unit of DSP central processing unit, the sinusoidal wave direction of electric energy to DSP central processing unit transmission detection signal in detection of grid; The virtual protection circuit of DSP central processing unit, controls IGBT switching tube in rectified three-phase circuit ZL and turn-offs, and realizes rectified three-phase circuit ZL input electric current for sinusoidal wave, power factor (PF) are 1, rectified three-phase circuit ZL output end voltage value is adjustable; The current/voltage detecting unit of DSP central processing unit, gathers galvanic electric current and voltage signal through rectified three-phase circuit ZL conversion, by virtual protection circuit, whole electric energy regeneration device is carried out to over-current over-voltage protection.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
Above content is only to structure example of the present utility model and explanation; affiliated those skilled in the art make various modifications to described specific embodiment or supplement or adopt similar mode to substitute; only otherwise depart from the structure of utility model or surmount this scope as defined in the claims, all should belong to protection range of the present utility model.
Claims (8)
1. a generator electric energy regeneration device, is characterized in that this device comprises:
PWM rectification unit, forms direct voltage for the AC rectification that generator ageing test is produced;
Inversion unit, for direct voltage is reverse into alternating voltage, and is fed back to electrical network.
2. generator electric energy regeneration device according to claim 1, it is characterized in that: described PWM rectification unit includes rectified three-phase circuit ZL, the alternating current that generator ageing test produces accesses be respectively in parallel in rectified three-phase circuit ZL three groups totally six IGBT switching tube (T1 by circuit breaker Q FA, T2, T3, T4, T5, T6), in, in every group of IGBT switching tube, upper and lower two switching tubes form the upper and lower bridge arm of IGBT.
3. generator electric energy regeneration device according to claim 2, it is characterized in that: this device also includes active inversion electric energy feedback control unit, described active inversion electric energy feedback control unit includes DSP central processing unit, described DSP central processing unit is integrated with for detection of the sinusoidal wave direction of electric energy in electrical network and to the synchronization signal unit of DSP central processing unit transmission detection signal, for controlling rectified three-phase circuit ZL IGBT switching tube to turn-off to realize rectified three-phase circuit ZL input electric current be sinusoidal wave and power factor (PF) being 1 and the adjustable virtual protection circuit of rectified three-phase circuit ZL output end voltage value, for gathering galvanic electric current and the voltage signal of changing through rectified three-phase circuit ZL and by virtual protection circuit, whole electric energy regeneration device being carried out the current/voltage detecting unit of over-current over-voltage protection.
4. generator electric energy regeneration device according to claim 2, is characterized in that: on the circuit between described circuit breaker Q FA and rectified three-phase circuit ZL, be provided with the filter inductance (L1, L2, L3) for transferring energy and balance phase voltage.
5. generator electric energy regeneration device according to claim 1, it is characterized in that: described inversion unit includes inverter NB, the every of inverter NB forms by upper and lower bridge arm, and upper brachium pontis adopts HCPL-3120 driving power module, and lower brachium pontis adopts HCPL-316J driving power module.
6. generator electric energy regeneration device according to claim 5, is characterized in that: in the DC circuit between described PWM rectification unit and inverter NB, be provided with filter capacitor Cdc.
7. generator electric energy regeneration device according to claim 1, is characterized in that: on the circuit between described inversion unit and electrical network, be provided with 300V/420V step-up transformer T.
8. generator electric energy regeneration device according to claim 7, it is characterized in that: on the circuit between described step-up transformer and electrical network, be provided with filter unit, filter unit is by the filter inductance (L4 being placed on three-phase circuit, L5, L6), A.C. contactor KM, grid-connected contactor QF and be parallel to N phase and the filter capacitor (C1 of each L between mutually, C2, C3) form, the output of filter unit accesses electrical network mutually through L1 phase, L2 phase, L3 phase and N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320564605.4U CN203491916U (en) | 2013-09-11 | 2013-09-11 | Generator electric energy regeneration utilization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320564605.4U CN203491916U (en) | 2013-09-11 | 2013-09-11 | Generator electric energy regeneration utilization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203491916U true CN203491916U (en) | 2014-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320564605.4U Expired - Fee Related CN203491916U (en) | 2013-09-11 | 2013-09-11 | Generator electric energy regeneration utilization device |
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| Country | Link |
|---|---|
| CN (1) | CN203491916U (en) |
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2013
- 2013-09-11 CN CN201320564605.4U patent/CN203491916U/en not_active Expired - Fee Related
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Granted publication date: 20140319 Termination date: 20160911 |