CN103441562B - High voltage direct current electric power system - Google Patents

High voltage direct current electric power system Download PDF

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CN103441562B
CN103441562B CN201310381623.3A CN201310381623A CN103441562B CN 103441562 B CN103441562 B CN 103441562B CN 201310381623 A CN201310381623 A CN 201310381623A CN 103441562 B CN103441562 B CN 103441562B
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power
switch
bus
direct current
electric power
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CN103441562A (en
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李孝众
王俊平
张企宇
张世聪
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Beijing Baidu Netcom Science and Technology Co Ltd
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Beijing Baidu Netcom Science and Technology Co Ltd
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Abstract

The present invention proposes a kind of novel high-pressure DC power-supply system framework being applied to data center.New system architecture has following features: one, online and off-line two kinds of patterns of compatible high voltage direct current, take into full account the powered compatibility of information technoloy equipment, and compliant architectures flexibly and have more Practical significance; Two, optimize storage battery checking discharge test function in line model, while improving accuracy of detection, reduce the damage of Large Copacity electric discharge to storage battery; Three, system increases accumulator testing bus, solves the problem of storage battery regular visit under high voltage direct current off-line mode in a simple manner decoupled; Four, use reversible transducer, accumulator cell charging and discharging is controlled more flexible; Five, off-line mode reduces the use of rectification module, improves system effectiveness, reduces early investment cost.

Description

High voltage direct current electric power system
Technical field
The present invention relates to power technique fields, particularly relate to a kind of high voltage direct current electric power system.
Background technology
In existing data center, usually use UPS(UninterruptiblePowerSystem, uninterrupted power supply) be main power supply unit, but this equipment exists, and conversion efficiency is low, Harmonics of Input is large, reliability is low, high in cost of production shortcoming.In this context, HVDC(High-VoltageDirectCurrent, high voltage direct current transmission) technology enters the visual field of people, 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 to export and receives on same DC bus, realize the power supply to bearing power and the management of charging and discharging to batteries by direct current supply control system.Particularly, in existing high voltage direct current electric power system, three-phase mains is converted into 240V direct current through rectification module, then supply load uses, and batteries is then connected on direct current supply bus as subsequent use.The efficiency of this electric power system rectification module is high, and the damage of single rectification module can't affect DC bus powered, and batteries is directly 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, be input to by three-phase alternating current 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 carried out conversion output direct current, then powering load after 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 load output power; When batteries regularly discharges core appearance, power-supply controller reduces the magnitude of voltage of rectification module output to below 240V (can set the magnitude of voltage of output according to the battery discharging cut-ff voltage expected), now rectification module inactivity exports, be then all load output power by batteries.
But 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, and therefore cause needing to arrange multiple rectification module, production cost is very high;
2), there is power loss in rectification module, causes entire system efficiency low;
3), batteries power output is uncontrollable, causes batteries to there is the possibility of Large Copacity electric discharge, affects the life-span of batteries;
4), due to batteries can carry out regular capacity to patrol and examine, namely system makes integration to storage battery power, completes appraising and deciding of power capacity, therefore, there is control precision not and the shortcoming to deviate etc. of batteries maintenance criterion when batteries exists the property checked electric discharge;
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 object of the present invention is to propose a kind of high voltage direct current electric power system.This system has the advantage that practicality is high, reliability is high, efficiency is high, Productive statistics is low.
To achieve these goals, the high voltage direct current electric power system of first aspect present invention embodiment comprises: multiple load; Be respectively the civil power direct-furnish bus of described multiple load supplying; For the multiple sub-electric power system of described multiple load supplying, each described sub-electric power system comprises further: the first rectifier cubice, and described first rectifier cubice comprises at least one rectification module, and one end of described first rectifier cubice is connected with ac bus; The first switch that first batteries is connected with described first batteries with one end; Second switch, one end of described second switch is connected with the other end of described first rectifier cubice with described first switch; Load DC bus, described load DC bus is connected with the other end of described second switch, and described load DC bus is load supplying corresponding to described sub-electric power system; First power-supply controller, described first power-supply controller is connected with second switch with described first switch respectively, and described first power-supply controller controls described first switch and second switch is that described load is with DC bus powered.
According to the high voltage direct current electric power system of the embodiment of the present invention, at least there is following advantage:
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, has taken into full account the control logic that the powered compatibility of load and current power product can meet, and therefore, as the electric power system of compatibility mode, its flexibility is high and have Practical significance;
3) under line model, the invariable power (or constant current) achieved in the property checked discharge test discharges requirement, tests the capacity of batteries more accurately, easily, and avoids Conventional mass and to discharge the damage caused batteries;
4) in disconnection mode, under the prerequisite not reducing electric power system reliability, greatly reduce rectification module quantity, reduce production cost;
5) add the test DC bus of batteries, according to the pattern of electric power system and the break-make of running status automatic control switch, solve the problem of the regular discharge test of batteries under high voltage direct current off-line mode;
6) discharge test is carried out to batteries and use energy feedback load, the energy source secondary produced during test is utilized, energy-saving and cost-reducing;
7) make the control of batteries discharge and recharge more flexible by alternating current-direct current reversible transducer;
8) the excessive phase of line model to off-line mode structure is considered, after the application conditions maturation of off-line mode, on the basis constant based on said system structure, change line model in early stage into off-line mode, in earlier stage the rectification module in rectifier cubice can be pulled out to support the later stage and drop into, because this reducing the investment that high voltage direct current electric power system entirety is built.
In sum, the high voltage direct current electric power system of the embodiment of the present invention has the advantage that practicality is high, reliability is high, efficiency is high, Productive statistics is low.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, 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
Be described below in detail embodiments of the invention, the example of embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.On the contrary, embodiments of the invention comprise fall into attached claims spirit and intension within the scope of all changes, amendment and equivalent.
In describing the invention, it is to be appreciated that term " first ", " second " etc. are only for describing object, and instruction or hint relative importance can not be interpreted as.In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " is connected ", " connection " should be interpreted broadly, such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.In addition, in describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
Below with reference to the accompanying drawings 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 to export and receives on same DC bus, realize the power supply to bearing power and the management of charging and discharging to batteries by direct current supply control system.If can under the prerequisite not reducing electric power system reliability, realize bifilar mode that is online and off-line, and the batteries in line model is patrolled and examined be optimized, thus, can further improve the efficiency of power supply, the production high cost of reduction equipment.
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, high voltage direct current electric power system comprises: multiple load 100, civil power direct-furnish bus 200, multiple sub-electric power system 300, ac bus 400, test DC bus 500, first DC bus 600, energy feedback module 700, second DC bus 800, battery testing load 900 and alternating current-direct current reversible transducer 1000, wherein, multiple sub-electric power system 300 comprises: the first rectifier cubice 311, first batteries 312, first switch 313, load DC bus 330, second switch 314, first power-supply controller 315, 3rd switch 316, second rectifier cubice 321, second batteries 322, 4th switch 323, 5th switch 324, second power-supply controller 325 and the 6th switch 326.
Wherein, multiple load 100 can be the blade server be such as applied in data center, many power service device, printer, scanner, facsimile machine etc.
Be respectively the civil power direct-furnish bus 200 of multiple load supplying.
For the multiple sub-electric power system 300 of multiple load supplying, wherein, every sub-electric power system comprises the first rectifier cubice 311, first rectifier cubice 311 and comprises at least one rectification module, and one end of the first rectifier cubice 311 is connected with ac bus 400; The first switch 313 that first batteries 312 is connected with the first batteries 312 with one end; Second switch 314, one end of second switch 314 is connected with the other end of the first rectifier cubice 311 with the first switch 313; Load DC bus 330, load DC bus 330 is connected with the other end of second switch 314, and load DC bus 330 is that the load 100 of sub-electric power system 300 correspondence is powered; First power-supply controller 315, first power-supply controller 315 is 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 powered for load DC bus 330.
In one embodiment of the invention, sub-electric power system 300 also comprises the 3rd switch 316, one end of 3rd switch 316 is connected with the first rectifier cubice 311, and the other end of the 3rd switch 316 is connected with test DC bus 500, and the first power-supply controller 315 controls the 3rd switch 316.
In one embodiment of the invention, sub-electric power system 300 also comprises the second rectifier cubice 321, second rectifier cubice 321 and comprises at least one rectification module, and one end of the second rectifier cubice 321 is connected with ac bus 400; The 4th switch 323 that second batteries 322, second batteries 322 is connected with the second batteries 322 with one end; One end of 5th switch the 324, five switch 324 is connected with the other end of the second rectifier cubice 321 with the 4th switch 323, and the other end of the 5th switch 324 is connected with load DC bus 330; Second power-supply controller 325, second power-supply controller 325 is 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 powered for load DC bus 330.
In one embodiment of the invention, sub-electric power system 300 also comprises the 6th switch 326, one end of 6th switch 326 is connected with the second rectifier cubice 321, and the other end of the 6th switch 326 is connected with test DC bus 500, and the second power-supply controller 325 controls the 6th switch 326.
In one embodiment of the invention, high voltage direct current electric power system also comprises the first DC bus 600 be connected with test DC bus 500; Energy feedback module 700, one 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, high voltage direct current electric power system also comprises the second DC bus 800 be connected with test DC bus 500; And the battery testing load 900 to be connected with the second DC bus 800.
In one embodiment of the invention, high voltage direct current electric power system also comprises the alternating current-direct current reversible transducer 1000 be connected between test DC bus 500 and ac bus 400.
Function and the operation principle of each part in high voltage direct current electric power system is elaborated below in conjunction with Fig. 2 and Fig. 3.As shown in Figures 2 and 3, high voltage direct current electric power system specifically can be divided into following five parts:
1) power pack: as shown in Figure 2, high voltage direct current electric power system can be made up of multiple sub-electric power system 300, such 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#) composition.Wherein, the system configuration of every sub-electric power system 300 is all identical, powers to respectively corresponding load 100.Sub-electric power system 300 is linked on test DC bus 500 by the 3rd switch 316 and the 6th switch 326, test can connect discharge load with on DC bus 500, 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 is primarily of a rectifier cubice and three switch compositions.Each power supply group all configures a group storage battery group, and power supply group is charged to this batteries, the management of discharging.For sub-electric power system 300(1#), two groups of identical rectifier cubices can be comprised in sub-electric power system 300, i.e. the first rectifier cubice 311 and the second rectifier cubice 321, two group storage battery group, i.e. three groups of switches of the first batteries 312 and the second batteries 322 and correspondence, 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, the mode that power supply group 1 is connected with load 100 with power supply group 2 is just the same.Such as, for group 1 of powering, the first rectifier cubice 311 is exported and is connected with test DC bus 500 with load 100, first batteries 312 respectively by the first switch 313, second switch 314 and the 3rd switch 316.The connected sum that first switch 313 can control the first batteries 312 disconnects, to carry out break-make protection to the first batteries 312; 3rd switch 316 can realize the first batteries 312 isolates with the connected sum of test DC bus 500; The connected sum that second switch 314 can control between the first rectifier cubice 311 and load 100 is isolated, and is not connected with load 100 by the convenient power supply group 1 that controls of second switch 314 and is conveniently controlled power supply group 1 and exit sub-electric power system 300.Load DC bus 330 can be load 100 and powers, and the power stage of this load DC bus 330 on the one hand can from the first rectifier cubice 311, and another aspect can from the first batteries 312.In addition, the another one that should be understood that in sub-electric power system 300 is powered group, i.e. power supply group 2 is identical with function with the structure of the power supply group 1 of above-mentioned explanation, no longer multiple superfluous herein.
3) load supplying part: as shown in Figure 2, load supplying part can adopt the pattern of a road civil power and a road high voltage direct current, is namely powered by civil power direct-furnish bus 200 and the 330 pairs of loads 100 of load DC bus.Wherein, the pattern of power supply can adopt line model and off-line mode two kinds, particularly in follow-up middle detailed description.When line model, civil power direct-furnish bus 200 and load DC bus 330 bear the power stage of 50% separately; When off-line mode, civil power direct-furnish bus 200 bears the power stage of 100%, and load DC bus 330 is in unloaded hot standby state not for load 100 provides load current.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 relative to traditional high voltage direct current power 100% line model for, the efficiency of power supply is all improved.
4) discharge test loading section: as shown in Figure 2, the load of batteries discharge test has two kinds of Alternative Form, and often kind of form all realizes selecting and being connected by mechanical switch switch.Such as, preferably through energy feedback module 700, wherein, can comprise one or more inversion module in energy feedback module 700, energy feedback module 700 can carry out recycling to energy.Secondly, also can use battery testing load 900 scheme in support, wherein, one or more battery discharge instrument can be comprised in battery testing load 900, inversion module in energy feedback module 700 is grid-connected failed and don't when affecting test assignment, batteries can be switched to battery discharge instrument to 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, to meet the demand of the charging and discharging of batteries.Such as, when the first batteries 312 carries out discharge test, alternating current-direct current reversible transducer 1000 can realize DC(DirectCurrent, direct current)/DC and DC/AC(AlternatingCurrent, alternating current) conversion, the alternating current that alternating current-direct current reversible transducer 1000 exports can be connected to the grid and carry out recycling or consumed by the discharge load be connected with alternating current-direct current reversible transducer 1000 one end; When the first batteries 312 carries out charging measurement, the energy of ac bus 400 realizes the conversion of AC/DC or DC/DC by alternating current-direct current reversible transducer 1000, and the exportable direct current of alternating current-direct current reversible transducer 1000 is that the first batteries 312 is charged.Thus, batteries can be allowed to depart from the control of high voltage direct current electric power system, for high voltage direct current electric power system provides a kind of alternative mode of operation, enhance flexibility.
The operation principle of line model and off-line mode in high voltage direct current electric power system is elaborated below in conjunction with Fig. 2 and Fig. 3.As shown in Figures 2 and 3, high voltage direct current electric power system specifically can be divided into line model (OnlineMode) and off-line mode (OfflineMode) two kinds:
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 controls the power output of the first rectifier cubice 311.
In one embodiment of the invention, when the electricity of the first batteries 312 is lower than default electricity, the first power-supply controller 315 controls the first switch 313 and closes, and second switch 314 is broken as the first batteries 312 and charges.
In one embodiment of the invention, under line model, when the civil power that civil power direct-furnish bus 200 connects is normal, first power-supply controller 315 controls the first rectifier cubice 311 with the first power stage, when the municipal power failure that civil power direct-furnish bus 200 connects, first power-supply controller 315 controls 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 high voltage direct current electric power system normally works, civil power direct-furnish bus 200 and load DC bus 330 bear the power stage of 50% separately; Such as, when utility power failure, after mains failure, load DC bus 330 bears the power stage of 100%, 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 the management of discharge and recharge and the detection of current parameters are carried out to the first batteries 312 of the first rectifier cubice 311 and the second rectifier cubice 321 correspondence and the second batteries 322.
More specifically, for group 1 of powering, the first rectifier cubice 311 and the first batteries 312 are by three switch access load DC buss 330, and the first power-supply controller 315 in the first rectifier cubice 311 can transmit control signal.Control the first switch 313 and second switch 314 is closed, the 3rd switch 316 disconnects, and be 270V by the direct voltage that the first power-supply controller 315 control load DC bus 330 exports.Now the first batteries 312 is in floating charge state, and load DC bus 330 is online for load 100 provides load current.In addition, power supply group 2 should be understood identical with the operation principle of power supply group 1, no longer multiple superfluous herein.
In one embodiment of the invention, the power output of the first power-supply controller 315 also for adjusting the first rectifier cubice 311 keeps constant, to test the first batteries 312 to make the output current of the first batteries 312.Particularly, as shown in Figure 4, for power supply group 1, if carry out discharge test to the first batteries 312 under line model, then the first power-supply controller 315 can reduce the power that the rectification module in the first rectifier cubice 311 exports, and the parameters such as the electric current of the first batteries 312 and load 100 are sampled, and the power of the output of the first rectifier cubice 311 is regulated in real time by the first power-supply controller 315, make the measuring current of the first batteries 312 keep constant (or power constant).That is, when the first batteries 312 needs to carry out discharge test online, the first power-supply controller 315 controls the 5th switch 324 and disconnects, and the first batteries 312 can realize the function of discharging.Thus can be completely the same with testing standard, relative to traditional routine inspection mode, improve measuring accuracy.
In addition, also by test DC bus 500, discharge test is carried out to the first batteries 312.Particularly, for power supply group 1, first power-supply controller 315 controls second switch 314 and disconnects and the switch disconnection controlling the first rectifier cubice 311 front end, completely isolated by the first rectifier cubice 311 and sub-electric power system 300, now the second rectifier cubice 321 and civil power direct-furnish bus 200 can be load 100 and power.First power-supply controller 315 controls the first switch 313 and the 3rd switch 316, the power that first batteries 312 exports flows to test load by test DC bus 500, can be carried out the electric discharge of constant current or invariable power by regulating load 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 to having very close matching relationship between the power supply group 1 in sub-electric power system 300 and power supply group 2, therefore, after discharge test is carried out to the first batteries 312, after needing the first batteries 312 to return to and being full of electricity condition, again discharge test is carried out to the second batteries 322, 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 to provide fully loaded power stage.Thus, the risk in test can be reduced, ensure that the electricity consumption of load in test is sufficient.
2) off-line mode:
In one embodiment of the invention, in disconnection mode, when the civil power that civil power direct-furnish bus 200 connects is normal, the first rectifier cubice 311 and the second rectifier cubice 321 are in unloaded hot standby state.Particularly, as shown in Figure 3, under off-line mode, when high voltage direct current electric power system normally works, civil power direct-furnish bus 200 bears the power stage of 100%, namely the power supply 1 of load 100 provides the power stage of 100%, and load DC bus 330 is in unloaded hot standby state, and namely the first rectifier cubice 311 and the second rectifier cubice 321 are in unloaded hot standby state.Now the first batteries 312 and the second batteries 322 access load 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 in disconnection mode, therefore only need to configure a small amount of rectification module in the first rectifier cubice 311 and the second rectifier cubice 321, charge and no-load loss with satisfied first batteries 312 and the second batteries 322.Thus, greatly can reduce the capacity of the first rectifier cubice 311 and the second rectifier cubice 321, significantly reduce production cost.
In addition, in disconnection mode, discharge test is carried out by test DC bus 500 pairs of batteries.Particularly, for power supply group 1, when the first batteries 312 is discharged, the first power-supply controller 315 controls that second switch 314 disconnects, the 5th switch 324 closes, and the switch of the first rectifier cubice 311 front end is disconnected, completely isolated with sub-electric power system 300 by the first rectifier cubice 311.Now, the first power-supply controller 315 controls the 3rd switch 316 and closes, and the first batteries 312 accesses test DC bus 500 by the first switch 313 and the 3rd switch 316.
Also test by above-mentioned test DC bus 500 when should be understood that and carry out discharge test to the second batteries 322, its principle is identical, no longer multiple superfluous herein.In addition, when carrying out discharge test to the first batteries 312, need maintenance second batteries 322 online.After first batteries 312 carries out discharge test, after needing the first batteries 312 to return to and being full of electricity condition, then discharge test is carried out to the second batteries 322.Thus, the risk in test can be reduced.
According to the high voltage direct current electric power system of the embodiment of the present invention, at least there is following advantage:
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, has taken into full account the control logic that the powered compatibility of load and current power product can meet, and therefore, as the electric power system of compatibility mode, its flexibility is high and have Practical significance;
3) under line model, the invariable power (or constant current) achieved in the property checked discharge test discharges requirement, tests the capacity of batteries more accurately, easily, and avoids Conventional mass and to discharge the damage caused batteries;
4) in disconnection mode, under the prerequisite not reducing electric power system reliability, greatly reduce rectification module quantity, reduce production cost;
5) add the test DC bus of batteries, according to the pattern of electric power system and the break-make of running status automatic control switch, solve the problem of the regular discharge test of batteries under high voltage direct current off-line mode;
6) discharge test is carried out to batteries and use energy feedback load, the energy source secondary produced during test is utilized, energy-saving and cost-reducing;
7) make the control of batteries discharge and recharge more flexible by alternating current-direct current reversible transducer;
8) the excessive phase of line model to off-line mode structure is considered, after the application conditions maturation of off-line mode, on the basis constant based on said system structure, change line model in early stage into off-line mode, in earlier stage the rectification module in rectifier cubice can be pulled out to support the later stage and drop into, because this reducing the investment that high voltage direct current electric power system entirety is built.
In sum, the high voltage direct current electric power system of the embodiment of the present invention has the advantage that practicality is high, reliability is high, efficiency is high, Productive statistics is low.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.

Claims (11)

1. a high voltage direct current electric power system, is characterized in that, comprising:
Multiple load;
Be respectively the civil power direct-furnish bus of described multiple load supplying;
For the multiple sub-electric power system of described multiple load supplying, each described sub-electric power system comprises further:
First rectifier cubice, described first rectifier cubice comprises at least one rectification module, and one end of described first rectifier cubice is connected with ac bus;
The first switch that first batteries is connected with described first batteries with one end;
Second switch, one end of described second switch is connected with the other end of described first switch with the other end of described first rectifier cubice;
Load DC bus, described load DC bus is connected with the other end of described second switch, and described load DC bus is load supplying corresponding to described sub-electric power system;
First power-supply controller, described first power-supply controller is connected with second switch with described first switch respectively, and described first power-supply controller controls described first switch and second switch is that described load is with DC bus powered;
3rd switch, one end of described 3rd switch is connected with the other end of described first rectifier cubice, and the other end of described 3rd switch is connected with test DC bus, and described first power-supply controller controls described 3rd switch.
2. high voltage direct current electric power system as claimed in claim 1, it is characterized in that, described first power-supply controller is connected with at least one rectification module in described first rectifier cubice, and described first power-supply controller controls the power output of described 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 that described civil power direct-furnish bus connects is normal, described first power-supply controller controls described first rectifier cubice with the first power stage, and when the municipal power failure that described civil power direct-furnish bus connects, described first power-supply controller controls described first rectifier cubice with the second power stage, wherein, described second power is greater than described first power.
4. high voltage direct current electric power system as claimed in claim 1, it is characterized in that, when the electricity of described first batteries is lower than default electricity, described first power-supply controller controls described first switch and closes, and described second switch disconnects thinks described first battery charging.
5. high voltage direct current electric power system as claimed in claim 2, it is characterized in that, the power output of described first power-supply controller also for adjusting described first rectifier cubice keeps constant, to test described first batteries to make the output current of described first batteries.
6. high voltage direct current electric power system as claimed in claim 1, it is characterized in that, described sub-electric power system also comprises:
Second rectifier cubice, described second rectifier cubice comprises at least one rectification module, and one end of described second rectifier cubice is connected with ac bus;
Second batteries, described second batteries is connected with one end of the 4th switch;
5th switch, one end of described 5th switch is connected with the other end of the other end of described second rectifier cubice with described 4th switch, and the other end of described 5th switch is connected with described load DC bus;
Second power-supply controller, described second power-supply controller is connected with the 5th switch with described 4th switch respectively, and described second power-supply controller controls described 4th switch and the 5th switch is that described load is with DC bus powered.
7. high voltage direct current electric power system as claimed in claim 6, it is characterized in that, described sub-electric power system also comprises:
6th switch, one end of described 6th switch is connected with the other end of described second rectifier cubice, and the other end of described 6th switch is connected with test DC bus, and described second power-supply controller controls described 6th switch.
8. high voltage direct current electric power system as claimed in claim 6, it is characterized in that, in disconnection mode, when the civil power that described civil power direct-furnish bus connects is normal, described first power-supply controller and the second power-supply controller control described first rectifier cubice and the second rectifier cubice is in unloaded hot standby state.
9. high voltage direct current electric power system as claimed in claim 1, is characterized in that, also comprise:
The first DC bus be connected with described test DC bus;
Energy feedback module, one end of described energy feedback module is connected with described first DC bus, and the other end of described energy feedback module is connected with described ac bus.
10. high voltage direct current electric power system as claimed in claim 1, is characterized in that, also comprise:
The second DC bus be connected with described test DC bus; And
The battery testing load be connected with described second DC bus.
11. high voltage direct current electric power systems as claimed in claim 1, is characterized in that, also comprise:
Be connected to the alternating current-direct current reversible transducer between described test DC bus and described ac bus.
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