CN205666678U - There is not disturbance colliery fan power supply auto -change over device fast - Google Patents

Abstract

The utility model provides a there is not disturbance colliery fan power supply auto -change over device fast, DC power supply, DC power supply is connected through contravariant module and fan distribution module, and fan distribution module is connected with the fan, fan distribution module still is connected with lock phase module, and the lock phase module be connected with the DSP digital control module, and the DSP digital control module is connected with the contravariant module. The utility model discloses, a possibility that switches over the controlling means that the colliery leads to fan power supply based on the quick no disturbance of dc -to -ac converter phase -locked loop, under the circumstances about not exerting an influence to the fan system, utilize present new forms of energy use in being incorporated into the power networks more extensive dc -to -ac converter phase -locked loop can quickly tracking electric wire netting phase place etc. The characteristics of information, the device adds on original distribution device basis, great improvement colliery ventilation system uninterrupted power supply.

Description

A kind of quickly undisturbed coal mine blower power transfer device

Technical field

This utility model relates to coal mine blower power supply technique field, and particularly a kind of quickly undisturbed coal mine blower power supply is cut Changing device.

Background technology

Coal mine ventilation system is the demand that mine safety operation is most basic, and ventilation blower provides ozone to mine, and Discharge in underground air and there is toxicity and volatile gas, dust etc., for working environment and the life of underground work personnel Safely provide most basic guarantee.But coal mining enterprise's electric power system transmission line of electricity mostly is overhead transmission line, easily by thunder and lightning, strong wind etc. The impact of natural disaster factor, the event such as system blackout, voltage jump happens occasionally, and causes a large amount of ventilation blower, gas suction pump Shut down so that ore deposit underground ventilating interrupts, and the life safety of underground work personnel has been arrived in serious threat.Therefore, power continually and steadily Safety in production to coal mining enterprise is particularly important.

Mine uses a plurality of bus stand-by power supply at present, in a sense improve safety, at a certain bar line Auxiliary bus-bar can also be used time breaking down in road to power, under extremely rugged environment, a plurality of line fault or disconnection, greatly Threaten the safety of underground coal mine staff.What employing was most at present is to use UPS uninterruption power source to power, Solve the impact that electrical network full cut-off electricity brings to a certain extent.But most of UPS use and quickly switch relay, and do not adopt With static switch, thus length switching time some.Owing to when normal power supply, UPS directly will be conducting to load end, the most just There is no the function such as rectification, filtering, be vulnerable to the impact of line voltage and harmonic current.Typically machine room and family PC and business The places less demanding to the magnitude of current such as field cash register use.

Prevent underground power supply system power supply trouble the most to greatest extent and have a power failure suddenly, safely and fast for blower fan provide Continual and steady power supply, it is ensured that down-hole uninterruptedly ventilates and the life guaranteeing underground work personnel is had safely highly important meaning Justice.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of quickly undisturbed coal mine blower power transfer device, Can quick switching undisturbed uninterruption power source in the case of power failure is all broken down in a plurality of supply line.

For solving above-mentioned technical problem, this utility model be the technical scheme is that a kind of quickly undisturbed colliery wind Electromechanical source switching device, DC source, described DC source is connected with blower fan Power entry module by inversion module, blower fan distribution mould Block is connected with blower fan；Blower fan Power entry module is also connected with phase-locked module, and phase-locked module is connected with DSP digital control module, DSP number Word control module is connected with inversion module.

Preferably, described inversion module includes that IPM module and optocoupler interface chip, described blower fan Power entry module include blower fan Distribution box and power distribution network, described phase-locked module includes phaselocked loop；Then DC source is connected with IPM module with blower fan distribution box even Connecing, DSP digital control module is connected with IPM module by optocoupler interface chip, and power distribution network is that blower fan distribution box is powered；Described lock Phase ring is connected with blower fan distributing cabinet, the running status of monitoring blower fan, is then connected with DSP digital control module.

Preferably, also including power network monitoring device, the operation conditions of described power network monitoring device monitoring power distribution network, electrical network is supervised Survey device to be connected with phaselocked loop and DSP digital control module.

Preferably, described power network monitoring device includes voltage transformer and current transformer.

Preferably, described phaselocked loop is the phaselocked loop adding low pass filter.

Compared with prior art, this utility model has the advantages that

1) this utility model, the control of a kind of quick switching undisturbed coalmine ventilation electromechanical source based on inverter phaselocked loop Device, compared with traditional coalmine ventilation electric power system, traditional coalmine ventilation electric power system uses a plurality of line powering, and half certainly The moving circuit for participating in is long for switching time, and in electrical network all power-off in particular cases, DC standby power is by inversion electricity Road, utilization adds low pass filter phaselocked loop and the most accurately follows the tracks of the change of line voltage and phase place, and it is fast to realize power supply undisturbed Speed switching；

2) this utility model, the control of a kind of quick switching undisturbed coalmine ventilation electromechanical source based on inverter phaselocked loop Device, is not producing in the case of impact blower fan system, is utilizing and apply wide inverter to lock in current new-energy grid-connected Phase ring can quickly follow the tracks of the feature of the information such as grid phase, adds this device, greatly on original distribution equipment foundation Improve the probability of coal mine ventilation system uninterrupted power supply.

Accompanying drawing explanation

The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings:

Fig. 1 is structural representation of the present utility model；

Fig. 2 is detailed construction schematic diagram of the present utility model；

Fig. 3 is the control principle drawing of this utility model phaselocked loop.

Detailed description of the invention

In Fig. 1-2, a kind of quickly undisturbed coal mine blower power transfer device, it is characterised in that: include DC source, Described DC source is connected with blower fan Power entry module by inversion module, and blower fan Power entry module is connected with blower fan；Blower fan distribution mould Block is also connected with phase-locked module, and phase-locked module is connected with DSP digital control module, and DSP digital control module is with inversion module even Connect.

Preferably, described inversion module includes that IPM module and optocoupler interface chip, described blower fan Power entry module include blower fan Distribution box and power distribution network, described phase-locked module includes phaselocked loop；Then DC source is connected with IPM module with blower fan distribution box even Connecing, DSP digital control module is connected with IPM module by optocoupler interface chip, and power distribution network is that blower fan distribution box is powered；Described lock Phase ring is connected with blower fan distributing cabinet, the running status of monitoring blower fan, is then connected with DSP digital control module.

Preferably, also including power network monitoring device, the operation conditions of described power network monitoring device monitoring power distribution network, electrical network is supervised Survey device to be connected with phaselocked loop and DSP digital control module.

Preferably, described power network monitoring device includes voltage transformer and current transformer.

Preferably, described phaselocked loop is the phaselocked loop adding low pass filter.

The real-time monitoring voltage of phaselocked loop and phase information, and send DSP digital control module to, DSP digital control module Send enable signal, make inversion module work, according to the phase angle in line voltage bust moment, the frequency of phase lock loop locks, make inverse Time variant voltage follows this phase place and frequency proceeds inversion fan and powers.When power system restoration is powered in the same way by wind Machine transfers to electrical network to power.

As it is shown on figure 3, phaselocked loop carries out Clark conversion and Park conversion to line voltage, by three phase static abc coordinate system Voltage quantities be transformed into the voltage quantities of biphase synchronous rotary dq coordinate system.The advantage of this conversion is three phase static Sinusoidal quantity in abc coordinate system is transformed into the DC quantity in biphase synchronous rotary dq coordinate system, realizes phase place by closed loop control Locking.Between the outfan and pi regulator of Uq, add low pass filter (LPF), be used for eliminating more than filter cutoff frequency Signal disturbing, transmission zero-decrement to desired low frequency signal, high-frequency interferencing signal is then tried one's best big decay and suppression, To phase-locked desired DC component, passing through of suppression AC compounent.Set input angle of cut-off speed omega as 30rad/s, in passband Allow fluctuating 3d B, stopband attenuation 15dB.For at the signal higher than 30 Hz, wave filter is output as 0, has reached filter exchange Purpose.

DSP digital control module uses float-point DSP TMS320F28335 of Texas Instrument (TI) company, and software controls Program is mainly based upon C language and is programmed.Phase-locked loop module sample circuit will gather the signals such as voltage, electric current, phase place, frequency The A/D interface unit of DSP it is input in being limited to certain voltage range.According to sampling line voltage instantaneous value and phaselocked loop inspection The grid phase information surveyed, dsp chip is collected these information and is driven for the PWM controlling IGBT module by software SVPWM6 road Moving pulse.DSP-F28335 mastery routine is mainly according to system initialization, peripheral hardware resource distribution, interruption initialization, self-defined change Amount initial value design etc..Need to block PWM in the mastery routine starting stage to export to avoid maloperation, finally open PWM in principal function Module, it is allowed to normally export.I/O controls and display lamp is for reminding the state being in of experimenter's machine.

Intelligent power module 50RSA060, the IPM SPM that IPM module is produced by Mitsubishi is in recent years Carry out popular advanced power device, and IPM be internally integrated logic, controlled, monitor and protection circuit, is easy to use, Not only reduce the volume of system, shorten the development time, also enhance the reliability of system, adapt to current power device Developing direction, has obtained increasingly being widely applied in field of power electronics.Its outfan is third generation IGBT, and carries The driver of characteristic energy, has the features such as volume is little, saturation pressure reduces, defencive function is complete, power headroom is big, due to IPM pair Drive circuit output voltage requires very strict, and driving voltage is generally 13.5V-16.5V, so using optocoupler to drive module.Come Drive IPM internal circuit to control switching tube by optical coupling module from the pwm signal of control circuit after current limliting to work.Above-mentioned Optocoupler uses Agilent company of the U.S. (former Hewlett-Packard) and aims at the Phototube Coupling interface chip of IPM constant power device design 4504, i.e. can play the effect of the security isolation Dead Time again for speed-sensitive switch and ensure that safety；The control of above-mentioned IGBT is: CPU output at ordinary times controls foot 1 and is in high level, and it is effective that IPM controls input low level, and logic sum gate output high level, IPM inputs Locking.When CPU output low level is effective, high frequency porcelain chip capacitor passes through conductive discharge, and logic sum gate input pin 2 still remains high Level, logic sum gate output high level, IPM input still locks.When electric capacity discharge off, or door input pin 2 becomes low level Time logic output be just low level, IPM controls input effectively, and therefore, capacitor discharge time is exactly that CPU controls output and arrives IPM control System inputs effective delay time.When CPU control output turn off i.e. export again become high level time, although electric capacity is in charging State and make or door input pin 2 is in low level, logic sum gate output still immediately becomes high level, locking IPM input.Above-mentioned Circuit is the wherein road that six road IPM control input, and same process is done on other five tunnels, by adjusting the parameter of R, C, it is possible to real Existing required delay time.

Phaselocked loop monitors the phase information of line voltage, the phase place of tracking lock electrical network AC signal in real time.When detecting Electrical network electric power system occurs when voltage lands, and controller sends enable signal, makes inversion module start working, to inverter module Trigger signal.The phase angle in line voltage bust moment according to phase lock loop locks, frequency, make inverter voltage follow this phase place and frequency Rate proceeds inversion fan load supplying.Thus avoid the impact on load of the electrical network power supply trouble, when line voltage is extensive Transferring to electrical network to power load again after Fu, the continuous undisturbed finally realizing ventilation blower is powered.

The above embodiments are only optimal technical scheme of the present utility model, and are not construed as limit of the present utility model System, the technical scheme that protection domain of the present utility model should be recorded with claim, the technical scheme recorded including claim The equivalents of middle technical characteristic is protection domain.Equivalent the most in this range is improved, also at this utility model Protection domain within.

Claims (5)

1. a quick undisturbed coal mine blower power transfer device, it is characterised in that: include DC source, described DC source Being connected with blower fan Power entry module by inversion module, blower fan Power entry module is connected with blower fan；Blower fan Power entry module also with phase-locked mould Block connects, and phase-locked module is connected with DSP digital control module, and DSP digital control module is connected with inversion module.

A kind of quickly undisturbed coal mine blower power transfer device, it is characterised in that: described inversion Module includes IPM module and optocoupler interface chip, and described blower fan Power entry module includes blower fan distribution box and power distribution network, described phase-locked Module includes phaselocked loop；DC source is connected with IPM module and is then connected with blower fan distribution box, and DSP digital control module passes through Optocoupler interface chip is connected with IPM module, and power distribution network is that blower fan distribution box is powered；Described phaselocked loop is connected with blower fan distributing cabinet, The running status of monitoring blower fan, is then connected with DSP digital control module.

A kind of quickly undisturbed coal mine blower power transfer device, it is characterised in that: also include electricity Net monitoring device, the operation conditions of described power network monitoring device monitoring power distribution network, power network monitoring device and phaselocked loop and DSP numeral Control module connects.

A kind of quickly undisturbed coal mine blower power transfer device, it is characterised in that: described electrical network Monitoring device includes voltage transformer and current transformer.

A kind of quickly undisturbed coal mine blower power transfer device, it is characterised in that: described phase-locked Ring is the phaselocked loop adding low pass filter.