CN103441562A - High-voltage direct current power supply system - Google Patents
High-voltage direct current power supply system Download PDFInfo
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Abstract
The invention provides a novel high-voltage direct current power supply system structure applied to a data center. The novel system structure is characterized in that a high-voltage direct current on-line mode and a high-voltage direct current off-line mode are combined, the power receiving compatibility of IT equipment is fully considered, the compatible structure is flexible, and more practical significance is achieved; the check discharge test function of a storage battery in the on-line mode is optimized, detection precision is improved, and meanwhile damage to the storage battery due to large-capacity discharging is reduced; a storage battery testing bus is added to the system, and the problem of the periodic inspection of the storage battery in the high-voltage direct current off-line mode is simply solved; a bidirectional transducer is used, and the charging and discharging control of the storage battery is more flexible; the using of a rectifier module is reduced in the off-line mode, system efficiency is improved, and input cost at an earlier stage is lowered.
Description
Technical field
The present invention relates to power technique fields, relate in particular to a kind of high voltage direct current electric power system.
Background technology
In existing data center, usually use UPS(Uninterruptible Power System, uninterrupted power supply) be main power supply unit, but this equipment exists, conversion efficiency is low, Harmonics of Input is large, reliability is low, the high in cost of production shortcoming.Under this background, HVDC(High-Voltage Direct Current, high voltage direct current transmission) technology enters people's the visual field, and moves to maturity gradually.
At present, the supply power voltage of high voltage dc transmission technology main flow is 240V, the framework form of this power supply technique is, uses rectifier output and storage battery output to receive on same DC bus, by the realization of direct current supply control system to the power supply of bearing power with to the management of charging and discharging of batteries.Particularly, in existing high voltage direct current electric power system, three-phase mains is converted into to the 240V direct current through rectification module, then supply load is used, and batteries is connected on the direct current supply bus as standby.The efficiency of this electric power system rectification module is high, and single rectification module damages and can't affect DC bus poweredly, and batteries directly is connected with load, and therefore, the efficiency of electric power system and reliability are all powered higher than traditional UPS.
As shown in Figure 1, in existing high voltage direct current electric power system, three-phase alternating current is input in rectifier cubice, the rectification module in rectifier cubice hangs together and is connected on DC bus, and by rectification module, three-phase alternating current is changed to output direct current, then powering load after the direct current cabinet distribution.When normal power supply, the power-supply controller of rectifier cubice improves the magnitude of voltage of rectification module output to 270V, and batteries is in floating charge state, and batteries does not now provide the load power output; When batteries is regularly discharged the core appearance, power-supply controller reduces the magnitude of voltage of rectification module output (can set according to the battery discharging cut-ff voltage of expectation the magnitude of voltage of output) to 240V, now rectification module inactivity output is all the load power output by batteries.
Yet there is following problem in existing high voltage dc transmission technology:
1), the capacity configuration of rectification module is generally maximal workload and the battery charging desired volume of load, therefore causes a plurality of rectification modules need to be set, production cost is very high;
2), there is power loss in rectification module, causes entire system efficiency low;
3), the batteries power output is uncontrollable, causes batteries to have the possibility of large capacity electric discharge, affects the life-span of batteries;
4), due to batteries, can carry out regular capacity and patrol and examine, system is made integration to storage battery power, completes appraising and deciding of power capacity, therefore, and the shortcoming that there is control precision in batteries not while having the property checked electric discharge and the batteries maintenance criterion deviates etc.;
Summary of the invention
The present invention is intended at least one of solve the problems of the technologies described above.
For this reason, first purpose of the present invention is to propose a kind of high voltage direct current electric power system.This system has advantages of that practicality is high, reliability is high, efficiency is high, production drops into low.
To achieve these goals, the high voltage direct current electric power system of first aspect present invention embodiment comprises: a plurality of loads; Be respectively the civil power direct-furnish bus of described a plurality of load supplyings; For a plurality of sub-electric power system of described a plurality of load supplyings, each described sub-electric power system further comprises: the first rectifier cubice, and described the first rectifier cubice comprises at least one rectification module, an end of described the first rectifier cubice is connected with ac bus; The first switch that the first batteries is connected with described the first batteries with an end; Second switch, an end of described second switch is connected with the other end of described the first switch with described the first rectifier cubice; The load DC bus, described load is connected with the other end of described second switch with DC bus, and described load is load supplying corresponding to described sub-electric power system with DC bus; The first power-supply controller, described the first power-supply controller is connected with second switch with described the first switch respectively, and described the first power-supply controller controls described the first switch and second switch is that described load is with DC bus powered.
At least there is following advantage in high voltage direct current electric power system according to the embodiment of the present invention:
1) adopt the scheme of a road civil power and a road high voltage direct current, no matter high voltage direct current adopts line model or off-line mode, and power supplying efficiency is all higher than the supply power mode of traditional high voltage direct current 100% power stage;
2) compatible high voltage direct current line model and off-line mode, taken into full account load and be subject to the control logic that electric compatibility and current power supply product can be satisfied, and therefore, as the electric power system of compatibility mode, its flexibility is high and have a Practical significance;
3) under line model, realized permanent power (or constant current) the electric discharge requirement in the property checked discharge test, test more accurately, easily the capacity of batteries, and the damage of having avoided traditional large capacity electric discharge to cause batteries;
4) under off-line mode, under the prerequisite that does not reduce the electric power system reliability, greatly reduced rectification module quantity, reduced production cost;
5) increase the test DC bus of batteries, according to the pattern of electric power system and the break-make of running status automatic control switch, solved the problem of the regular discharge test of batteries under the high voltage direct current off-line mode;
6) batteries is carried out to discharge test and use the energy feedback load, the energy source secondary utilization produced during by test, energy-saving and cost-reducing;
7) control that by the alternating current-direct current reversible transducer, batteries is discharged and recharged is more flexible;
8) consider the excessive phase of line model to the off-line mode structure, after the application conditions maturation of off-line mode, on the basis constant based on the said system structure, in earlier stage line model changes off-line mode into, in earlier stage the rectification module in rectifier cubice can pull out to support the later stage input, has therefore reduced the whole investment of building of high voltage direct current electric power system.
In sum, the high voltage direct current electric power system of the embodiment of the present invention has advantages of that practicality is high, reliability is high, efficiency is high, production drops into low.
The aspect that the present invention is additional and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
The accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein,
Fig. 1 is the structural representation of existing high voltage direct current electric power system;
Fig. 2 is the structural representation of high voltage direct current electric power system according to an embodiment of the invention;
Fig. 3 is the structural representation of the double mode power supply control of high voltage direct current electric power system according to an embodiment of the invention; And
Fig. 4 is the structural representation of the discharge test of batteries under line model according to an embodiment of the invention.
Embodiment
Below describe embodiments of the invention in detail, the example of embodiment is shown in the drawings, and wherein same or similar label means same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.On the contrary, embodiments of the invention comprise spirit and interior all changes, modification and the equivalent of intension scope that falls into additional claims.
In description of the invention, it will be appreciated that, term " first ", " second " etc. are only for describing purpose, and can not be interpreted as indication or hint relative importance.In description of the invention, it should be noted that, unless otherwise clearly defined and limited, term " is connected ", " connection " should do broad understanding, for example, can be to be fixedly connected with, and can be also to removably connect, or connects integratedly; Can be mechanical connection, can be also to be electrically connected to; Can be directly to be connected, also can indirectly be connected by intermediary.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.In addition, in description of the invention, except as otherwise noted, the implication of " a plurality of " is two or more.
In flow chart or any process of otherwise describing at this or method describe and can be understood to, mean to comprise one or more module, fragment or part for the code of the executable instruction of the step that realizes specific logical function or process, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can be not according to order shown or that discuss, comprise according to related function by the mode of basic while or by contrary order, carry out function, this should be understood by the embodiments of the invention person of ordinary skill in the field.
Below with reference to accompanying drawing, the high voltage direct current electric power system according to the embodiment of the present invention is described.
At present, the framework form of HVDC (High Voltage Direct Current) transmission system is, uses rectifier output and storage battery output to receive on same DC bus, by the realization of direct current supply control system to the power supply of bearing power with to the management of charging and discharging of batteries.If can under the prerequisite that does not reduce the electric power system reliability, realize the bifilar mode of online and off-line, and the batteries in line model is patrolled and examined and is optimized, thus, can further improve the efficiency of power supply, the production that reduces equipment is expensive.
Fig. 2 is the structural representation of high voltage direct current electric power system according to an embodiment of the invention, Fig. 3 is the structural representation of the double mode power supply control of high voltage direct current electric power system according to an embodiment of the invention, and Fig. 4 is the structural representation of the discharge test of batteries under line model according to an embodiment of the invention.
As shown in Figures 2 and 3, the high voltage direct current electric power system comprises: a plurality of loads 100, civil power direct-furnish bus 200, a plurality of sub-electric power systems 300, ac bus 400, DC bus 500 for test, the first DC bus 600, energy feedback module 700, the second DC bus 800, battery testing load 900 and alternating current-direct current reversible transducer 1000, wherein, a plurality of sub-electric power systems 300 comprise: the first rectifier cubice 311, the first batteries 312, the first switch 313, DC bus 330 for load, second switch 314, the first power-supply controller 315, the 3rd switch 316, the second rectifier cubice 321, the second batteries 322, the 4th switch 323, the 5th switch 324, the second power-supply controller 325 and the 6th switch 326.
Wherein, a plurality of loads 100 can be such as being applied in blade server in data center, many power supplys server, printer, scanner, facsimile machine etc.
Be respectively the civil power direct-furnish bus 200 of a plurality of load supplyings.
For a plurality of sub-electric power system 300 of a plurality of load supplyings, wherein, every sub-electric power system comprises that the first rectifier cubice 311, the first rectifier cubices 311 comprise at least one rectification module, and an end of the first rectifier cubice 311 is connected with ac bus 400; The first switch 313 that the first batteries 312 is connected with the first batteries 312 with an end; Second switch 314, an end of second switch 314 is connected with the other end of the first switch 313 with the first rectifier cubice 311; DC bus 330 for load, load is connected with the other end of second switch 314 with DC bus 330, load 100 power supplies that load is sub-electric power system 300 correspondences with DC bus 330; The first power-supply controller 315, the first power-supply controllers 315 are connected with second switch 314 with the first switch 313 respectively, and the first power-supply controller 315 controls the first switch 313 and second switch 314 is DC bus 330 power supplies for load.
In one embodiment of the invention, sub-electric power system 300 also comprises the 3rd switch 316, one end of the 3rd switch 316 is connected with the first rectifier cubice 311, and the other end of the 3rd switch 316 is connected with DC bus 500 with test, and the first power-supply controller 315 is controlled the 3rd switch 316.
In one embodiment of the invention, sub-electric power system 300 also comprises that the second rectifier cubice 321, the second rectifier cubices 321 comprise at least one rectification module, and an end of the second rectifier cubice 321 is connected with ac bus 400; The 4th switch 323 that the second batteries 322, the second batteries 322 are connected with the second batteries 322 with an end; One end of the 5th switch 324, the five switches 324 is connected with the other end of the 4th switch 323 with the second rectifier cubice 321, and the other end of the 5th switch 324 is connected with DC bus 330 with load; The second power-supply controller 325, the second power-supply controllers 325 are connected with the 5th switch 324 with the 4th switch 323 respectively, and the second power-supply controller 325 controls the 4th switch 323 and the 5th switch 324 is DC bus 330 power supplies for load.
In one embodiment of the invention, sub-electric power system 300 also comprises the 6th switch 326, one end of the 6th switch 326 is connected with the second rectifier cubice 321, and the other end of the 6th switch 326 is connected with DC bus 500 with test, and the second power-supply controller 325 is controlled the 6th switch 326.
In one embodiment of the invention, the high voltage direct current electric power system also comprises the first DC bus 600 be connected with DC bus 500 with test; Energy feedback module 700, an end of energy feedback module 700 is connected with the first DC bus 600, and the other end of energy feedback module 700 is connected with ac bus 400.
In one embodiment of the invention, the high voltage direct current electric power system also comprises the second DC bus 800 be connected with DC bus 500 with test; And the battery testing load 900 be connected with the second DC bus 800.
In one embodiment of the invention, the high voltage direct current electric power system also comprises the alternating current-direct current reversible transducer 1000 be connected between test use DC bus 500 and ac bus 400.
Elaborate function and the operation principle of each part in the high voltage direct current electric power system below in conjunction with Fig. 2 and Fig. 3.As shown in Figures 2 and 3, the high voltage direct current electric power system can specifically be divided into following five parts:
1) power pack: as shown in Figure 2, the high voltage direct current electric power system can be comprised of a plurality of sub-electric power systems 300, for example, as shown in Figure 2, by sub-electric power system 300(1#), sub-electric power system 300(2#), sub-electric power system 300(3#) ... sub-electric power system 300(n#) form.Wherein, the system configuration of every sub-electric power system 300 is all identical, gives respectively corresponding load 100 power supplies.Sub-electric power system 300 can be linked into test with on DC bus 500 by the 3rd switch 316 and the 6th switch 326, test is with on DC bus 500, connecting discharge load, to meet two batteries, i.e. the first batteries 312 and the second batteries 322, the requirement of regular visit.
2) sub-electric power system part: as shown in Figure 2, every sub-electric power system 300 can comprise two power supply groups, i.e. power supply group 1 and power supply group 2, and each power supply group mainly is comprised of a rectifier cubice and three switches.Each power supply group all configures a group storage battery group, the management that the power supply group is charged, discharged this batteries.Take sub-electric power system 300(1#) be example, can comprise two groups of identical rectifier cubices in sub-electric power system 300, i.e. the first rectifier cubice 311 and the second rectifier cubice 321, two group storage battery groups, i.e. the first batteries 312 and the second batteries 322 and three groups of corresponding switches, i.e. the first switch 313 and the 4th switch 323, second switch 314 and the 5th switch 324, the 3rd switch 316 and the 6th switch 326.Wherein, the first rectifier cubice 311 and the second rectifier cubice 321 all can comprise one or more rectification module.
Particularly, power supply group 1 is just the same with the mode that load 100 is connected with power supply group 2.For example, take power supply group 1 as example, the first rectifier cubice 311 outputs are connected with DC bus 500 with load 100, the first batteries 312 and test respectively by the first switch 313, second switch 314 and the 3rd switch 316.The connected sum that the first switch 313 can be controlled the first batteries 312 disconnects, so that the first batteries 312 is carried out to the break-make protection; The 3rd switch 316 can be realized the first batteries 312 and the connected sum isolation of test with DC bus 500; Second switch 314 can be controlled the connected sum isolation between the first rectifier cubice 311 and load 100, and with load 100, is not connected and conveniently controls power supply group 1 and exit sub-electric power system 300 by the convenient control power supply of second switch 314 group 1.Load can be load 100 power supply with DC bus 330, and this load on the one hand can be from the first rectifier cubice 311 with the power stage of DC bus 330, on the other hand can be from the first batteries 312.In addition, should be understood that the another one power supply group in sub-electric power system 300, i.e. power supply group 2 is identical with structure and the function of the power supply group 1 of above-mentioned explanation, no longer multiple superfluous herein.
3) load supplying part: as shown in Figure 2, the load supplying part can adopt the pattern of a road civil power and a road high voltage direct current, by civil power direct-furnish bus 200 and load, with 330 pairs of loads 100 of DC bus, is powered.Wherein, the pattern of power supply can adopt two kinds of line model and off-line modes, particularly in follow-up middle detailed description.When line model, 50% power stage is born in civil power direct-furnish bus 200 and load separately with DC bus 330; When off-line mode, civil power direct-furnish bus 200 is born 100% power stage, and load does not provide load current for load 100 with DC bus 330 in the hot standby state of zero load.Thus, no matter be line model or off-line mode, the high voltage direct current electric power system in the embodiment of the present invention is for the line model of traditional high voltage direct current power supply 100%, and the efficiency of power supply all is improved.
4) discharge test loading section: as shown in Figure 2, the load of batteries discharge test has two kinds of optional forms, and every kind of form all realizes selecting and being connected by mechanical diverter switch.For example, preferably, by energy feedback module 700, wherein, in energy feedback module 700, can comprise one or more inversion module, energy feedback module 700 can be carried out recycling to energy.Secondly, also can use battery testing load 900 scheme in support, wherein, can comprise one or more battery discharge instrument in battery testing load 900, inversion module in energy feedback module 700 is grid-connected failed and don't while affecting test assignment, batteries can be switched to the battery discharge instrument and complete test, introduce in detail in follow-up particularly.
5) reversible transducer part: as shown in Figure 2, for above-mentioned discharge test loading section, the two-way flow of alternating current-direct current reversible transducer 1000 controllable current, with the demand of the charging and discharging that meets batteries.For example, when the first batteries 312 is carried out discharge test, alternating current-direct current reversible transducer 1000 can be realized DC(Direct Current, direct current)/DC and DC/AC(Alternating Current, alternating current) conversion, the alternating current of alternating current-direct current reversible transducer 1000 outputs can be connected to the grid and carries out recycling or consume by the discharge load be connected with alternating current-direct current reversible transducer 1,000 one ends; When the first batteries 312 is carried out charging measurement, the energy of ac bus 400 can be realized by alternating current-direct current reversible transducer 1000 conversion of AC/DC or DC/DC, and the exportable direct current of alternating current-direct current reversible transducer 1000 is that the first batteries 312 is charged.Thus, can allow batteries break away from the control of high voltage direct current electric power system, for the high voltage direct current electric power system provides a kind of alternative mode of operation, strengthen flexibility.
Elaborate the operation principle of line model and off-line mode in the high voltage direct current electric power system below in conjunction with Fig. 2 and Fig. 3.As shown in Figures 2 and 3, the high voltage direct current electric power system can specifically be divided into two kinds of line model (Online Mode) and off-line modes (Offline Mode):
1) line model:
In one embodiment of the invention, the first power-supply controller 315 is connected with at least one rectification module in the first rectifier cubice 311, and the first power-supply controller 315 is controlled the power output of the first rectifier cubice 311.
In one embodiment of the invention, when the electric weight of the first batteries 312, during lower than default electric weight, the first power-supply controller 315 is controlled the first switch 313 closures, and second switch 314 is broken as the first batteries 312 chargings.
In one embodiment of the invention, under line model, when the civil power connected when civil power direct-furnish bus 200 is normal, the first power-supply controller 315 is controlled the first rectifier cubice 311 with the first power stage, when municipal power failure that civil power direct-furnish bus 200 connects, the first power-supply controller 315 is controlled the first rectifier cubice 311 with the second power stage, and wherein, the second power is greater than the first power.Particularly, as shown in Figure 3, under line model, when the high voltage direct current electric power system works, 50% power stage is born in civil power direct-furnish bus 200 and load separately with DC bus 330; When civil power breaks down, for example, after mains failure, 100% power stage is born in load with DC bus 330, and the first rectifier cubice 311 in sub-electric power system 300 and the second rectifier cubice 321 need to be configured according to power stage at full capacity.And respectively to the first batteries 312 of the first rectifier cubice 311 and the second rectifier cubice 321 correspondences and management that the second batteries 322 is discharged and recharged and the detection of current parameters.
More specifically, take power supply group 1 as example, the first rectifier cubice 311 and the first batteries 312 can transmit control signal with the first power-supply controller 315 in DC bus 330, the first rectifier cubices 311 by three switch access loads.Control the first switch 313 and second switch 314 closures, the 3rd switch 316 disconnections, and be 270V by the first power-supply controller 315 control loads with the direct voltage of DC bus 330 outputs.Now the first batteries 312 is in floating charge state, and load provides load current for load 100 online with DC bus 330.In addition, should understand power supply group 2 identical with the operation principle of power supply group 1, no longer multiple superfluous herein.
In one embodiment of the invention, the first power-supply controller 315 also for the power output of adjusting the first rectifier cubice 311 so that the output current of the first batteries 312 keeps constant, so that the first batteries 312 is tested.Particularly, as shown in Figure 4, take power supply group 1 as example, if under line model, the first batteries 312 is carried out to discharge test, the first power-supply controller 315 can reduce the power of the rectification module output in the first rectifier cubice 311, and the parameters such as electric current of the first batteries 312 and load 100 are sampled, and regulate in real time the power of the output of the first rectifier cubice 311 by the first power-supply controller 315, make the measuring current of the first batteries 312 keep constant (or power keeps constant).That is to say, when the first batteries 312 need to be carried out discharge test online, the first power-supply controller 315 is controlled the 5th switch 324 and is disconnected, and the first batteries 312 can realize the function of electric discharge.Thus can be in full accord with testing standard, the routine inspection mode with respect to traditional, improved measuring accuracy.
In addition, also can use 500 pairs of the first batteries 312 of DC bus to carry out discharge test by test.Particularly, take power supply group 1 as example, the first power-supply controller 315 is controlled the switch disconnection that second switch 314 disconnects and control the first rectifier cubice 311 front ends, be about to the first rectifier cubice 311 and isolate fully with sub-electric power system 300, now the second rectifier cubice 321 and civil power direct-furnish bus 200 can be load 100 power supplies.The first power-supply controller 315 is controlled the first switch 313 and the 3rd switch 316, the power of the first batteries 312 outputs uses DC bus 500 to flow to test load by test, by regulating load, can carry out the electric discharge of constant current or permanent power to the first batteries 312.
Should be understood that and also can carry out discharge test by above-mentioned two kinds of modes to the second batteries 322, its principle is identical, no longer multiple superfluous herein.In addition, owing between the power supply group 1 in sub-electric power system 300 and power supply group 2, very close matching relationship being arranged, therefore, after the first batteries 312 is carried out to discharge test, after the first batteries 312 need to being returned to and being full of electricity condition, again the second batteries 322 is carried out to discharge test, and, after power supply group 1 exits sub-electric power system 300, need the second rectifier cubice 321 and civil power direct-furnish bus 200 that the fully loaded power stage is provided.Thus, can reduce the risk in test, guarantee the electricity consumption abundance of load in test.
2) off-line mode:
In one embodiment of the invention, under off-line mode, when the civil power connected when civil power direct-furnish bus 200 is normal, the first rectifier cubice 311 and the second rectifier cubice 321 are in the hot standby state of zero load.Particularly, as shown in Figure 3, under off-line mode, when the high voltage direct current electric power system works, civil power direct-furnish bus 200 is born 100% power stage, the power supply 1 that is load 100 provides 100% power stage, and load uses DC bus 330 in the hot standby state of zero load, and the first rectifier cubice 311 and the second rectifier cubice 321 are in the hot standby state of zero load.Now the first batteries 312 and the second batteries 322 access loads with DC bus 330 in support.Because one or more rectification module in the first rectifier cubice 311 and the second rectifier cubice 321 does not need to provide power stage to load 100 under off-line mode, therefore only need in the first rectifier cubice 311 and the second rectifier cubice 321, configure a small amount of rectification module, get final product to meet the first batteries 312 and the second batteries 322 chargings and no-load loss.Thus, can greatly reduce the capacity of the first rectifier cubice 311 and the second rectifier cubice 321, significantly reduce production cost.
In addition, under off-line mode, can use 500 pairs of batteries of DC bus to carry out discharge test by test.Particularly, take power supply group 1 as example, and when the first batteries 312 electric discharge, the first power-supply controller 315 is controlled second switch 314 disconnections, the 5th switch 324 closures, and the switch of the first rectifier cubice 311 front ends is disconnected, be about to the first rectifier cubice 311 and isolate fully with sub-electric power system 300.Now, the first power-supply controller 315 is controlled the 3rd switch 316 closures, and the first batteries 312 is by the first switch 313 and the 3rd switch 316 access test DC buss 500.
Should be understood that when the second batteries 322 is carried out to discharge test and also can be tested with DC bus 500 by above-mentioned test, its principle is identical, no longer multiple superfluous herein.In addition, when the first batteries 312 is carried out to discharge test, need to keep the second batteries 322 online.After the first batteries 312 is carried out discharge test, after the first batteries 312 need to being returned to and being full of electricity condition, then the second batteries 322 is carried out to discharge test.Thus, can reduce the risk in test.
At least there is following advantage in high voltage direct current electric power system according to the embodiment of the present invention:
1) adopt the scheme of a road civil power and a road high voltage direct current, no matter high voltage direct current adopts line model or off-line mode, and power supplying efficiency is all higher than the supply power mode of traditional high voltage direct current 100% power stage;
2) compatible high voltage direct current line model and off-line mode, taken into full account load and be subject to the control logic that electric compatibility and current power supply product can be satisfied, and therefore, as the electric power system of compatibility mode, its flexibility is high and have a Practical significance;
3) under line model, realized permanent power (or constant current) the electric discharge requirement in the property checked discharge test, test more accurately, easily the capacity of batteries, and the damage of having avoided traditional large capacity electric discharge to cause batteries;
4) under off-line mode, under the prerequisite that does not reduce the electric power system reliability, greatly reduced rectification module quantity, reduced production cost;
5) increase the test DC bus of batteries, according to the pattern of electric power system and the break-make of running status automatic control switch, solved the problem of the regular discharge test of batteries under the high voltage direct current off-line mode;
6) batteries is carried out to discharge test and use the energy feedback load, the energy source secondary utilization produced during by test, energy-saving and cost-reducing;
7) control that by the alternating current-direct current reversible transducer, batteries is discharged and recharged is more flexible;
8) consider the excessive phase of line model to the off-line mode structure, after the application conditions maturation of off-line mode, on the basis constant based on the said system structure, in earlier stage line model changes off-line mode into, in earlier stage the rectification module in rectifier cubice can pull out to support the later stage input, has therefore reduced the whole investment of building of high voltage direct current electric power system.
In sum, the high voltage direct current electric power system of the embodiment of the present invention has advantages of that practicality is high, reliability is high, efficiency is high, production drops into low.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that do not break away from principle of the present invention and aim can be carried out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (12)
1. a high voltage direct current electric power system, is characterized in that, comprising:
A plurality of loads;
Be respectively the civil power direct-furnish bus of described a plurality of load supplyings;
For a plurality of sub-electric power system of described a plurality of load supplyings, each described sub-electric power system further comprises:
The first rectifier cubice, described the first rectifier cubice comprises at least one rectification module, an end of described the first rectifier cubice is connected with ac bus;
The first switch that the first batteries is connected with described the first batteries with an end;
Second switch, an end of described second switch is connected with the other end of described the first switch with described the first rectifier cubice;
The load DC bus, described load is connected with the other end of described second switch with DC bus, and described load is load supplying corresponding to described sub-electric power system with DC bus;
The first power-supply controller, described the first power-supply controller is connected with second switch with described the first switch respectively, and described the first power-supply controller controls described the first switch and second switch is that described load is with DC bus powered.
2. high voltage direct current electric power system as claimed in claim 1, is characterized in that, described the first power-supply controller is connected with at least one rectification module in described the first rectifier cubice, and described the first power-supply controller is controlled the power output of described the first rectifier cubice.
3. high voltage direct current electric power system as claimed in claim 2, it is characterized in that, under line model, when the civil power connected when described civil power direct-furnish bus is normal, described the first power-supply controller is controlled described the first rectifier cubice with the first power stage, and when municipal power failure that described civil power direct-furnish bus connects, described the first power-supply controller is controlled described the first rectifier cubice with the second power stage, wherein, described the second power is greater than described the first power.
4. high voltage direct current electric power system as claimed in claim 1, it is characterized in that, when the electric weight of described the first batteries, during lower than default electric weight, described the first power-supply controller is controlled described the first switch closure, and described second switch disconnects thinks described the first battery charging.
5. high voltage direct current electric power system as claimed in claim 2, it is characterized in that, described the first power-supply controller also for the power output of adjusting described the first rectifier cubice so that the output current of described the first batteries keeps constant, so that described the first batteries is tested.
6. high voltage direct current electric power system as claimed in claim 1, is characterized in that, described sub-electric power system also comprises:
The 3rd switch, an end of described the 3rd switch is connected with described the first rectifier cubice, and the other end of described the 3rd switch is connected with DC bus with test, and described the first power-supply controller is controlled described the 3rd switch.
7. high voltage direct current electric power system as claimed in claim 1, is characterized in that, described sub-electric power system also comprises:
The second rectifier cubice, described the second rectifier cubice comprises at least one rectification module, an end of described the second rectifier cubice is connected with ac bus;
The second batteries, the 4th switch that described the second batteries is connected with described the second batteries with an end;
The 5th switch, an end of described the 5th switch is connected with the other end of described the 4th switch with described the second rectifier cubice, and the other end of described the 5th switch is connected with DC bus with described load;
The second power-supply controller, described the second power-supply controller is connected with the 5th switch with described the 4th switch respectively, and described the second power-supply controller controls described the 4th switch and the 5th switch is that described load is with DC bus powered.
8. high voltage direct current electric power system as claimed in claim 7, is characterized in that, described sub-electric power system also comprises:
The 6th switch, an end of described the 6th switch is connected with described the second rectifier cubice, and the other end of described the 6th switch is connected with DC bus with test, and described the second power-supply controller is controlled described the 6th switch.
9. high voltage direct current electric power system as claimed in claim 7, it is characterized in that, under off-line mode, when the civil power connected when described civil power direct-furnish bus is normal, described the first power-supply controller and the second power-supply controller are controlled described the first rectifier cubice and the second rectifier cubice in the hot standby state of zero load.
10. high voltage direct current electric power system as claimed in claim 6, is characterized in that, also comprises:
The first DC bus be connected with DC bus with described test;
The energy feedback module, an end of described energy feedback module is connected with described the first DC bus, and the other end of described energy feedback module is connected with described ac bus.
11. high voltage direct current electric power system as claimed in claim 6, is characterized in that, also comprises:
The second DC bus be connected with DC bus with described test; And
The battery testing load be connected with described the second DC bus.
12. high voltage direct current electric power system as claimed in claim 6, is characterized in that, also comprises:
Be connected to the alternating current-direct current reversible transducer between DC bus and described ac bus for described test.
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