CN202475006U - Medium-voltage emergency power supply taking boosting pulse as guarantee for charging - Google Patents
Medium-voltage emergency power supply taking boosting pulse as guarantee for charging Download PDFInfo
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- CN202475006U CN202475006U CN2012200599387U CN201220059938U CN202475006U CN 202475006 U CN202475006 U CN 202475006U CN 2012200599387 U CN2012200599387 U CN 2012200599387U CN 201220059938 U CN201220059938 U CN 201220059938U CN 202475006 U CN202475006 U CN 202475006U
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Abstract
The utility model provides a medium-voltage emergency power supply taking boosting pulse as guarantee for charging, which is characterized in that when the voltage of a medium-voltage alternating-current power supplying busbar is normal, a discharging control switch is turned off, a pulse main switch is turned off, the medium direct current of industrial transmission charges for serial connected storage battery packs through a charging main switch; when the serial connected total voltage of the storage batteries is close to the voltage value of industrial transmission medium direct current, the pulse main switch starts to operate, and the system enters the pulse boosting lifting charging stage; when an emergency power supply discharges, the pulse main switch is turned off, and a discharging control switch is connected. By implementing the medium-voltage emergency power supply taking boosting pulse as guarantee for charging, when the medium voltage power supplying busbar or a system power supply malfunctions, a medium voltage alternating current power system can be ensured to not stop operating with any set time, and especially can operate continuously and normally under the condition that a power grid is in power failure suddenly, thus the loss of power failure because of power grid fault is reduced to '0'.
Description
Technical field
The present invention relates to ~ 0.66KV-10KV (this patent defined " middle pressure ") uninterrupted power supply field, more particularly, more particularly, relating to the voltage boosting pulse is the middle pressure emergency power supply that ensures charging.
Background technology
In the industrial power field; It is year historical surplus the low-pressure type emergency power supply of ~ 380/220 system has had ten at home as the Emergency power supply unit of industry and civil area emergency lighting and line load; Form related patent U.S. Patent No. ten remainders, in ~ 380V electric power system, shown energy-saving and environmental protection, fast, high reliability, be convenient to a series of advantages such as maintenance, intelligent management, raising power supply reliability.And be accompanied by the high-power appearance that drags load of industrial circle, be used for dragging system ~ 0.66KV-~ the 10KV alternating current motor just came out as far back as the seventies, was very ripe through 30 years of development.In recent years; In order to reduce the volume and weight of large capacity motor; More for the laying installation of avoiding big electrical current carriers, connection and a security classes difficult problem such as excessive; Large capacity motor on many program control type of industrial circle streamlines is progressively replaced by the medium-pressure type motor, and the medium voltage converter product (being referred to as " industrial transmission " or " ac power transmission " abroad) of startup and control medium-pressure type motor is also ripe gradually.Yet other interchange emergency power supply of medium pressure grade is the market vacancy both domestic and external, particularly industrial circle always, almost can not find and successfully uses the electric power storage type to exchange the successful case of emergency power supply.All the time; In press the power system functional reliability depend on reliability fully in electric network source; In case electrical network has a power failure suddenly for some reason; The flow process that program control type industry is moving will all standing, and (according to an annual meeting report of group of PetroChina Company Limited.: only tens of electric power system faults just took place in 2011 the refinery plate, because of program control flow process all standing causes tens00000000 yuan of direct and consequential damages) will bring about great losses.In order to reduce loss as far as possible; The streamline of many program control industry has to dispose the air-driven type delay system of external import, is used to alleviate the loss of power failure flow process all standing, but this type of air-driven type delay system can only play limited mitigation; Suitably reduce the loss that has a power failure suddenly; Can't drop to the loss of urban network electricity source all standing and be bordering on " 0 ", and this type of pneumatic deferred mount expensive, additional operating cost at ordinary times is also very important.
In foregoing ~ 380V and following low pressure uninterrupted power supply (UPS and EPS), often lean on the direct rectification of input voltage to accomplish to the charging of internal series-connection batteries.Therefore, if the total series voltage of storage battery equals the dc voltage value after the alternating current input power supplying rectification, then can't the series connection batteries be full of electricity (have only charging voltage to be higher than be recharged storage battery total voltage about 10 or above could storage battery being full of); If storage battery series connection total voltage is lower than the commutating voltage value of input power supply,, can not guarantee again that when power failure is emergent the ac voltage of emergent output meets the requirements though maybe the series connection batteries be full of electricity.Emergent output voltage meets the requirements in order to guarantee batteries can be filled electricity; Not to boost rectification charging, the processing of boosting before inversion or after the inversion exactly; And these two kinds of measures are difficult and complicated relatively in medium voltage network; The former need test and construct the higher direct voltage of a cover and the rectifying device that boosts of more high-power environment again, and the latter need construct a cover high-power medium voltage DC source or an AC transformation device again, and the two technical all being difficult to implements; Security reliability is not high, and cost is but very high.
Summary of the invention
The technical problem that the present invention will solve is, to the technological deficiency of the pneumatic delay system in the program control field of modern industry, a kind of middle emergency power supply of pressing is provided; Can not satisfy for series connection batteries in the common emergency power supply is full of the technological deficiency of electricity to the dc voltage value after the direct rectification of Alternating Current Power Supply bus again, providing a kind of is the medium voltage network emergency power supply that ensures charging with the voltage boosting pulse.
It is the middle pressure emergency power supply that ensures charging with the voltage boosting pulse that the present invention provides a kind of; It is characterized in that the positive pole of pulse main switch connects and discharges and recharges the bus positive pole, negative pole connects a winding positive pole of pulse booster transformer; The positive pole of counnter attack switch connects the positive pole of pulse booster transformer secondary winding; Negative pole connects the positive pole of series connection batteries, and the positive pole of charging main switch connects and discharges and recharges the bus positive pole, and negative pole connects the positive pole of series connection batteries; The positive pole of discharge control switch connects the positive pole of series connection batteries, and negative pole connects the positive pole that discharges and recharges bus; The negative pole of the negative pole of a winding of pulse booster transformer, the negative pole of secondary winding and series connection batteries all is connected with the negative pole that discharges and recharges bus; Central pressure Alternating Current Power Supply busbar voltage just often; Discharge control switch turn-offs; The pulse main switch turn-offs, and the median circulation of industrial transmission is overcharged main switch to charged by series storage battery, when storage battery series connection total voltage during near industrial transmission middle dc voltage value; The pulse main switch is started working, and system gets into pulse boosting and promotes the charging stage; When emergency power supply discharged, the pulse main switch turn-offed, and discharge control switch is connected.
Preferably, the positive pole that discharges and recharges bus is connected with the positive pole of the intermediate dc bus of industrial transmission, and negative pole is connected with the negative pole of the intermediate dc bus of industrial transmission.
Preferably, the scope of the alternating voltage output valve of the energy conversion of industrial transmission is 0.66KV to 10KV.
Preferably, pulse main switch and discharge control switch are controlled type of noncontacting switch.
Preferably, the charging main switch is a noncontacting switch.
Preferably, the charging main switch is the controllable type noncontacting switch.
Preferably, the counnter attack switch is a noncontacting switch.
Preferably, the counnter attack switch is the controllable type noncontacting switch.
Embodiment of the present invention be the middle pressure emergency power supply that ensures charging with the voltage boosting pulse; Have following beneficial effect: 1) through adopting the charging guarantee in pulse boosting loop, the rectification link that can make full use of ripe industrial transmission main frame is to battery charging and be full of; When 2) pressing the ac power system to run into medium-pressure electricity supply bus or system power supply fault in can guaranteeing; Do not quitting work in the setting-up time arbitrarily; Especially under the situation of electrical network sudden power, can continue operate as normal, thereby " 0 " is reduced in the loss that electric network fault is had a power failure.
Description of drawings
Fig. 1 is that the present invention is the structural representation that ensures a specific embodiment of the middle pressure emergency power supply of charging with the voltage boosting pulse.
Embodiment
Fig. 1 is that the present invention is the structural representation that ensures a specific embodiment of the middle pressure emergency power supply of charging with the voltage boosting pulse.As shown in the figure, the positive pole of pulse main switch G3 connects the positive pole that discharges and recharges bus M, and negative pole connects the winding positive pole of pulse booster transformer B, and the control utmost point meets controller K; The positive pole of counnter attack switch G4 connects the positive pole of pulse booster transformer B secondary winding, and negative pole connects the positive pole of series connection batteries E; The positive pole of charging main switch G1 connects and discharges and recharges the bus positive pole, and negative pole connects the positive pole of series connection batteries E; The positive pole of discharge control switch G2 connects the positive pole of series connection batteries E, and negative pole connects the positive pole that discharges and recharges bus M, and the control utmost point meets controller K; The negative pole of the negative pole of a winding of pulse booster transformer B, the negative pole of secondary winding and series connection batteries E all is connected with the negative pole that discharges and recharges bus M.The positive pole that discharges and recharges bus is connected with the positive pole of the intermediate dc bus of industrial transmission PM, and negative pole is connected with the negative pole of the intermediate dc bus of industrial transmission PM.Press Alternating Current Power Supply bus L2 during the input of industry transmission PM connects, press emergency power load D during output connects, for example motor.Industry transmission PM mainly is made up of middle repoussage stream link CZ and inversion link SW, and basic principle and low pressure (380V) commutation inversion principle is basic identical, and signal is slightly different with controlled function, and middle dc voltage is about 891V.When the configure dedicated controller, also can be with pressing rectifier and inverter to replace in corresponding.
In the present invention, pulse main switch G3 and discharge control switch G2 are controlled type noncontacting switch, can be device such as IGCT, IGBT, IPM, electric power-MOSFET, (GTO), SITH, MCT or the switch module or the switching circuit that are made up of electronic device.Charging main switch G1 is any power electronics class noncontacting switch; Can be P-MOSFET, IGBT, IGCT, IPM, SITH, MCT, turn-off thyristor (GTO), also can be diode, thyristor or the switching circuit that combined by power electronic device.Counnter attack switch G4 is any power electronics class noncontacting switch, can be controllable type, also can be uncontrollable type, when adopting the controllable type noncontacting switch, and better effects if.Pulse transformer can be type of the boosting pulse transformer of power frequency or intermediate frequency or high frequency.
The scope of the ac voltage of industrial transmission PM energy conversion output of the present invention is 0.66KV to 10KV.PM is as the ac energy converting means in the industry transmission, can be the industrial driving type frequency conversion main frame of reputable brands such as ABB, Siemens or Shi Naide, also can be homemade medium voltage converter device, can also be middle pressure wideband inverter.
In the present embodiment, industrial transmission PM output valve adopts 0.66KV, i.e. 660V.The input direct voltage of industry transmission PM inversion link should be not less than 891V, and the quantity of needed every group of series connection batteries E is more than 445 joints of 74 serial joints of 12V or 2V series.In order to give series connection batteries E charging; The total voltage that then need guarantee to charge is higher than 10%-15% of series connection batteries E total voltage; Exchange the series voltage value that transmission main frame middle dc voltage can only equal above-mentioned storage battery, can only be to the charged by series storage battery of power shortage but can't guarantee to be full of.Therefore, the present invention utilizes the situation that is recharged of controller K monitoring series connection batteries E, in time starting impulse charge circuit.Controller K can be single-chip microcomputer, single board computer, industrial computer, intelligent control instrument, PLC or other the computer control device with controlled function, also can be replaced by industrial drive controller.
In the middle of press Alternating Current Power Supply bus L2 just often, in press the emergent AC power of the required 660V of power and provide through the commutation inversion link by middle pressure Alternating Current Power Supply bus L2, at this moment, discharge control switch G2 is in off state.This moment, then the forward conduction by charging main switch G1 kept charging normal series connection batteries E if series connection batteries E charging voltage is starkly lower than 891V (industrial transmission middle dc voltage value); When controller K monitors series connection batteries E voltage when closing on 891V (parameter is adjustable); Controller K just sends control signal to pulse main switch G3; Pulse main switch G3 produces pulse current, and in a winding, sets up pulse change magnetic field then according to the frequency switch motion of setting repeatedly; After boosting through secondary winding the high voltage induction pulse current is constantly filled into series connection batteries E, after storage battery is full of fully, quit work and get into the intermittent charge work condition state.
When in controller K monitors through detection signal V, pressing Alternating Current Power Supply bus L2 to have a power failure for some reason; Controller K sends control signal to pulse main switch G3; The shutoff of control impuls main switch G3, G2 sends control signal to discharge control switch, and control discharge control switch G2 connects.The series connection batteries E provide DC power supply through discharge control switch G2 discharge for the inversion link of industrial transmission PM, and this moment, the 660V power supply of industrial transmission PM output was an emergency power supply.The energy of series connection batteries E drains, and under-voltage protection starts back discharge control switch G2 and automatically shuts down, and industrial transmission PM stops output; Or host computer sends stopping signal, and discharge control switch G2 automatically shuts down, and industrial transmission PM stops output; Or press Alternating Current Power Supply bus L2 power up among the 660V, when discharge control switch G2 automatically shut down, series connection batteries E got into charged state again under the control of controller K.As required, series connection batteries E can be 1 group, also can be more than 2 groups, as long as each group is anodal and negative pole parallel connection respectively.
The present invention can be widely used in the emergency power system of industrial circle all kinds of Process Control Systems, particularly chemical industry, oil, petrochemical industry and coal chemical technology.
The present invention describes through embodiment, and those skilled in the art know, under the situation that does not break away from the spirit and scope of the present invention, can carry out various changes or equivalence replacement to these characteristics and embodiment.In addition, under instruction of the present invention, can make amendment to these characteristics and embodiment can not break away from the spirit and scope of the present invention to adapt to concrete situation and material.Therefore, the present invention does not receive the restriction of specific embodiment disclosed herein, and all interior embodiment of claim scope that fall into the application belong to protection scope of the present invention.
Claims (8)
1. one kind is the middle pressure emergency power supply that ensures charging with the voltage boosting pulse; It is characterized in that the positive pole of pulse main switch connects and discharges and recharges the bus positive pole, negative pole connects a winding positive pole of pulse booster transformer; The positive pole of counnter attack switch connects the positive pole of pulse booster transformer secondary winding; Negative pole connects the positive pole of series connection batteries, and the positive pole of charging main switch connects and discharges and recharges the bus positive pole, and negative pole connects the positive pole of series connection batteries; The positive pole of discharge control switch connects the positive pole of series connection batteries, and negative pole connects the positive pole that discharges and recharges bus; The negative pole of the negative pole of a winding of pulse booster transformer, the negative pole of secondary winding and series connection batteries all is connected with the negative pole that discharges and recharges bus; Central pressure Alternating Current Power Supply busbar voltage just often; Discharge control switch turn-offs; The pulse main switch turn-offs, and the median circulation of industrial transmission is overcharged main switch to charged by series storage battery, when storage battery series connection total voltage during near industrial transmission middle dc voltage value; The pulse main switch is started working, and system gets into pulse boosting and promotes the charging stage; When emergency power supply discharged, the pulse main switch turn-offed, and discharge control switch is connected.
2. according to claim 1 is the middle pressure emergency power supply that ensures charging with the voltage boosting pulse, it is characterized in that the positive pole that discharges and recharges bus is connected with the positive pole of the intermediate dc bus of industrial transmission, and negative pole is connected with the negative pole of the intermediate dc bus of industrial transmission.
3. according to claim 1 and 2 is the middle pressure emergency power supply that ensures charging with the voltage boosting pulse, it is characterized in that the scope of the alternating voltage output valve of the energy conversion of industrial transmission is 0.66KV to 10KV.
4. according to claim 3 is the middle pressure emergency power supply that ensures charging with the voltage boosting pulse, it is characterized in that, pulse main switch and discharge control switch are controlled type of noncontacting switch.
5. described based on claim 4 is the middle pressure emergency power supply that ensures charging with the voltage boosting pulse, it is characterized in that the charging main switch is a noncontacting switch.
6. described based on claim 5 is the middle pressure emergency power supply that ensures charging with the voltage boosting pulse, it is characterized in that, the charging main switch is the controllable type noncontacting switch.
7. according to claim 6 is the middle pressure emergency power supply that ensures charging with the voltage boosting pulse, it is characterized in that the counnter attack switch is a noncontacting switch.
8. according to claim 7 is the middle pressure emergency power supply that ensures charging with the voltage boosting pulse, it is characterized in that the counnter attack switch is the controllable type noncontacting switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200599387U CN202475006U (en) | 2012-02-23 | 2012-02-23 | Medium-voltage emergency power supply taking boosting pulse as guarantee for charging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200599387U CN202475006U (en) | 2012-02-23 | 2012-02-23 | Medium-voltage emergency power supply taking boosting pulse as guarantee for charging |
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| CN202475006U true CN202475006U (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200599387U Expired - Lifetime CN202475006U (en) | 2012-02-23 | 2012-02-23 | Medium-voltage emergency power supply taking boosting pulse as guarantee for charging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624046A (en) * | 2012-02-23 | 2012-08-01 | 国彪电源集团有限公司 | Medium-voltage emergency power supply for guaranteeing charge by aid of boosting pulse |
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2012
- 2012-02-23 CN CN2012200599387U patent/CN202475006U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624046A (en) * | 2012-02-23 | 2012-08-01 | 国彪电源集团有限公司 | Medium-voltage emergency power supply for guaranteeing charge by aid of boosting pulse |
| CN102624046B (en) * | 2012-02-23 | 2015-03-04 | 国彪电源集团有限公司 | Medium-voltage emergency power supply for guaranteeing charge by aid of boosting pulse |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121003 |
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| CX01 | Expiry of patent term |