CN102355042A - Super-capacitor-based direct current power device of power station and power supply method thereof - Google Patents
Super-capacitor-based direct current power device of power station and power supply method thereof Download PDFInfo
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Abstract
The invention discloses a super-capacitor-based direct current power device of a power station and a power supply method. The direct current power device of the power station is arranged between a voltage transformer and a direct current load of a high-voltage switch cabinet of the power station, and comprises a power module and an energy storage module, wherein the power module consists of a rectification conditioning sub-module, a constant power charging sub-module and a current foldback circuit; and the energy storage module consists of a capacitor energy storage sub-module, a charging and discharging control sub-module and a remaining power releasing sub-module. By the device and the method, a direct current operating power supply, gaining power from the voltage transformer of the high-voltage switch cabinet, of the power station is realized, stores energy based on a super capacitor, can be directly arranged on the switch cabinet, and has the characteristics of high instantaneous output power, high efficiency, high reliability, freedom from maintenance, small volume, low cost and the like.
Description
Technical field
The invention belongs to power station equipment power supply power supply technique category and super capacitor energy-storage technology category; Be meant that especially a kind of efficient is high, in light weight, it is little to take up room, can be directly installed on power station continuous-current plant and method of supplying power to thereof that high-voltage switch gear, need not made regular maintenance cashier's office in a shop, can work alone for a long time, be applicable to switching station by it based on super capacitor.
Background technology
Along with the construction of China's extensive city net and deepening continuously of improvement project, the 10kV switching station is as the critical facility in the 10kV power distribution network, and the status in having the city medium voltage distribution network of certain load density is more and more important.Continuing to bring out of skyscraper and large public building more and more tends to reach perfection with complicated city function.Power consumer is had higher requirement to the reliability and the flexibility of power distribution network.Build up the 10kV switching station,, improve the power supply capacity of power distribution network, very important effect is arranged making up 10kV town power distribution network main grid structure.Reinforcement improves the flexibility of power distribution network operation and scheduling to the control of power distribution network, thereby improves the reliability of whole power distribution network power supply greatly.The switching station that some has been arranged.Can realize the optimized dispatching to power distribution network, during the net overhaul of the equipments of part city, can carry out the adjustment of operational mode, the user does not have a power failure when accomplishing overhaul of the equipments; When device fails.Switching station can be brought into play the advantage of its flexible operation, and the isolated fault unit reduces the power failure scope rapidly.
At present; What most switching station adopted is the alternating current operation power supply; Be that voltage transformer (PT) is gone up power taking in the on-the-spot PT cabinet as the one of which; Like JDZW2-12W type voltage transformer (PT); No-load voltage ratio is 10/0.22kV; Capacity reaches 1200VA; Moment, capacity can reach 3000VA, and the time can reach 30ms, carried the JDZRW2-12W2 of fuse (XRNP-10/0.5A) protection type for another example; For a long time use capacity to be 300VA; Short-term uses capacity to be 800VA, and heap(ed) capacity is 960VA, similarly also has JDZC-10; JDZF8-10; The JDZX8-10 voltage ratio all can be 10000/100/220; Capacity reaches 1000VA, and maximum can be accomplished 2000VA.This mode power supply ratio is easier to obtain; Economical and practical; Maintenance cost is low, implement simple, and shortcoming to be system lose electricity back alternating current operation power supply can break simultaneously; The switching station operational reliability is not high; Than higher, the operation of inductive load can have influence on system's primary side power supply quality, and is unfavorable for the stability of system to the requirement meeting of PT for it; The action need of big capacity switching station can not be satisfied, the correct operation of route protection can not be guaranteed when sending electricity with fault.
Another kind of ac power supply method is that the alternating current operation power supply draws the distribution transforming station from nearby; This mode can not have influence on the primary side power supply quality of own system basically; But the workload that can increase line length and equipment investment, maintenance also can increase accordingly; Moreover switching station much all is unwatched now; And away from the residential area; The bad solution of line arrangement problem, expenditure of construction significantly rises; If obtain from the public change of overhead wire, safety and reliability are again less than assurance.
What also have a lot of switching stations employings is direct current operative power source; Switching station need be equipped with the direct current cabinet of being made up of storage battery in this case; It can be able to store bigger electric energy and the direct current supply of the back long period of realizing having a power failure; Like the wall-hanging direct current cabinet of PZDK-BG01; Its output current is 0～6 ampere, and battery capacity is 220 volts/7～24 ampere-hours.The back direct current supply for a long time yet in fact switching station need not have a power failure; Consider reliability that will assurance accident separating brake and used such equipment; Can bring very high operation cost, and need frequent maintaining, the useful life of battery is not long yet.Also (any batteries has problem to failure rate, all will influence the work as usual of whole batteries because of the multi-section serial of battery increases in addition.) from environmental angle, it is not a kind of green energy resource.
Ultracapacitor is a kind of extraordinary capacitor that is specifically designed to energy storage that just grew up in recent years; The super large capacitor amount that the farad level is arranged; The high hundreds of times of long-pending ability density than traditional electrolytic capacitor; Leakage current is little nearly thousand times; Its discharge specific power is high nearly ten times than storage battery; Without any need for care and maintenance; Life-span reached more than 10 years; It is a kind of desirable high-power physics secondary power supply; Successful startup power supply as explosive motor; The starting of electric motor car; Quicken; The climbing power supply, the breaking-closing operating power supply of high-voltage switch gear and be used for moving panzer of fax and large-scale magnetizing equipment.The main feature of super capacitor reduces: (1) charging rate is fast, charges can reach more than 95% of its rated capacity in 10 seconds～10 minutes; (2) it is long to recycle the life-span, and degree of depth charge and discharge cycles access times can reach 500,000 times, if super capacitor is discharged and recharged 20 times every day, use can reach 68 years continuously, does not have " memory effect "; (3) large current discharging capability is superpower, and energy conversion efficiency is high, and the process loss is little, big current energy cycle efficieny >=90%; (4) power density is high, can reach 300W/KG～5000W/KG, is equivalent to 5～10 times of battery; (5) the product raw material constitute, produce, use, store and disassemble process all less than polluting, and are ideal green environmental protection power supplys; (6) it is simple to discharge and recharge circuit, need not the such charging circuit of rechargeable battery, and coefficient of safety is high, uses non-maintaining for a long time; (7) the ultralow temperature characteristic is good, and temperature range is wide-40 ℃～+ 70 ℃; (8) easy to detect, dump energy can directly be read; (9) the common 0.1F--1000F of range of capacity.
Summary of the invention
The problem that the present invention will solve is: the power supply technique of opening and closing operations power supply can not satisfy user demand in the existing network system, and the reliability and the feature of environmental protection have much room for improvement.
The technical program: supercapacitor-based power station DC power supply unit, set the high voltage switchgear in the power plant and the DC load voltage transformer between said DC power supply device includes a power plant and energy storage module power supply module, power module by the rectifier conditioning sub-module, constant power charging electronic module, a current foldback circuit, energy storage module consists of a capacitor energy storage sub-module, charge and discharge control sub-module, I release the power sub-module; current foldback circuit is a reverse voltage 1000V diode, the diode maximum continuous conduction current 10A, power module has an input terminal: Port 0, and two outputs: port 1 and port 2, the energy storage module has a connection port: port 3, where port 0 Connect power station output voltage switchgear voltage transformer, connect the DC load port 1, port 2 to port 3 connected energy storage module, port 0 conditioning sub-module and the rectifier connected to the input, the output rectifier conditioning sub-module filled with constant power electronic modules and input port 1 is connected to the constant power output charging electronic module is connected to port 2, port 2 through current foldback circuit and the power supply module is connected to port 1, the diode's direction from port 2 to port 1, port storage module 3 and the charge-discharge control sub-module is connected to the input of the charge and discharge control sub-module output terminal of capacitor energy storage sub-module connected to the input capacitor energy storage sub-module output and I released electrically connected to the input sub-module,
Described capacitance energy storage submodule is made up of n super capacitor and n group balance equalizer circuit; The super capacitor series connection; N group balance equalizer circuit is parallelly connected with n super capacitor respectively; The anode of the 1st super capacitor is as the positive pole of capacitance energy storage submodule, and the negative terminal of n super capacitor is as the negative pole of capacitance energy storage submodule.
The said control submodule that discharges and recharges is made up of voltage threshold circuit and switch execution unit; The voltage threshold circuit is driven by voltage threshold gear switch switch, bleeder circuit, working power, reference voltage, voltage comparator and execution unit to be formed; Working power inserts bleeder circuit and reference voltage circuit; Diverter switch inserts bleeder circuit; Bleeder circuit and reference voltage insert voltage comparator; The voltage comparator output inserts the execution unit drive circuit, and the execution unit drive circuit inserts the switch execution unit; Wherein execution unit drives and is composed in parallel by heavy-duty diode, a plurality of P channel mosfet; The G utmost point of said a plurality of P channel mosfets, D level, S level are connected in parallel respectively; The common S of switch execution unit links to each other with the capacitance energy storage submodule for extreme mouthful; The common D of switch execution unit links to each other with the Switching Power Supply supply for extreme mouthful; The voltage threshold circuit has two-stage thresholding gear, switches through voltage threshold gear switch switch.
Described surplus electricity discharges submodule and is made up of discharge switch and m * n resistance; N resistance series connection is one group, and the parallel connection again of m group series resistance obtains the resistance battle array; Discharge switch is connected with said resistance battle array, and the disjunct end of discharge switch and resistance battle array is respectively two electrodes that surplus electricity discharges submodule.
Use the method for supplying power to of above-mentioned power station continuous-current plant based on super capacitor to do, the voltage transformer output AC power source of power station high-tension switch cabinet, input power module is carried out rectification and is boosted the direct current of output voltage stabilization by the rectification conditioning submodule; Said direct current is imported permanent power charging submodule and DC load respectively; Permanent power charging submodule charges through discharging and recharging control submodule control capacitance energy storage submodule; Be full of electricity back capacitance energy storage submodule and be in the charging hold mode; Increase in short-term and surpassed under the situation of rectification conditioning output module peak power output in the DC load need for electricity, power module and energy-storage module are supplied power to DC load jointly; When the voltage transformer of power station high-tension switch cabinet cut off the power supply, energy-storage module was returned to port one through discharging and recharging the control submodule by the electric current feedback circuit with the electric energy that stores, and supplies power to DC load; Discharge and recharge the control submodule and be provided with two voltage threshold of height; Switch by the gear switch switch; When the voltage of energy-storage module is lower than the high voltage thresholding that discharges and recharges the control submodule; By the discharge loop that discharges and recharges control submodule shutoff capacitance energy storage submodule; Stop DC load being supplied power; This moment is as switching to low-voltage thresholding gear with voltage threshold gear switch switch; Then the capacitance energy storage submodule will continue externally power supply, be lower than the low-voltage thresholding of setting until the voltage of capacitance energy storage submodule; Behind the voltage transformer service restoration of power station high-tension switch cabinet, permanent power charging submodule begins the energy-storage module charging is full of the back and gets into holding state through discharging and recharging the control submodule immediately, discharges and recharges the cycle until the next one.
The present invention overcomes the deficiency that existing switching station operating power power supply technique exists, provide a kind of do not need from other distribution transforming station external power supplys, can not influence system's primary side power supply quality through the power supply of high-tension switch cabinet PT secondary side the power plant operation power supply with continuous-current plant and method of supplying power to.This continuous-current plant is based on super capacitor energy-storage; As the emergency power supply of switching station load with the protection action; Working power is provided under the normal operating position most switching station loads; Also can be after system's dead electricity in 30 milliseconds; Subsequent use DC supply for emergency is provided for protective device and power station equipment; Its long service life, efficient is high, in light weight, it is little to take up room, can be directly installed on high-voltage switch gear, need not make regular maintenance cashier's office in a shop, can work alone for a long time.
The present invention compares with background technology, and the beneficial effect that has is:
1) supply unit is made up of power module and two standalone modules of energy-storage module.Power module is made up of rectification conditioning output sub-module, permanent power charging submodule, electric current feedback circuit.Energy-storage module by the capacitance energy storage submodule, discharge and recharge the control submodule, surplus electricity discharges submodule and forms.Module of the present invention is few; Integrated level is high; Two standalone modules can adopt 19 inches height cabinets of standard; Shielding cabinet with protection equipment installs; Any DC power supply product is all little a lot of on the volume ratio market; Not only for the user practices thrift the equipment construction cost, and place, city cost of possession that can saves valuable.
2) supply unit of the present invention solves operation of switching station normal load and emergency power supply problem, compares other supply power modes, has characteristics reliable and stable, advantages of small volume.Because of the switching station One's name is legion with distribute wide; Old supply power mode needs personnel's periodic maintenance and maintenance more, the human input of labor, and supply unit of the present invention adopts super capacitor as energy-storage travelling wave tube; And corresponding design protection and control circuit, can accomplish non-maintaining operation.Supply unit of the present invention arrives switching station and similar power station environment to the super capacitor technical application for the first time, and adopts series system to realize high pressure 220V energy storage, and directly powering load is avoided the intermediate voltage conversion links, improves device reliability greatly.The method of supplying power to that the present invention discards tradition has solved the problem that perplexs the switching station power supply for many years, has good economy and social value.
3) the present invention adopts based on the DC power supply of super capacitor and compares employing alternating current operation power supply; Has the investment of saving; Be not subjected to the influence of electric power system wiring construction condition and safety factor; And can guarantee the externally situation of system cut-off; Still can keep emergency service, and can ensure that when down subsystem powers on protective device can be protected correct operation under the situation of combined floodgate and three phase short circuit fault.Compare the alternating current operation power supply, also have the characteristics that the primary system quality of voltage is not subjected to the electrical secondary system load effect.
4) supply unit adopts the rectification conditioning output sub-module from a direct power taking of PT secondary side of switching station; And pass through permanent power charging submodule and directly forceful electric power 220V capacitance energy storage submodule is charged; Cooperate to discharge and recharge the memory capacity that control submodule reasonable distribution discharges capacitance group, the emergence power when guaranteeing the system restoration power supply is supplied with.Can replace from far-end power distribution station power taking pattern, reduce the switching station dependence of electric power system to external world, practice thrift construction cost and can reduce electricity consumption danger.
5) energy-storage module is because the integrated functions such as control, energy capacitance set, the release of surplus electricity that discharge and recharge.Possesses the stored energy capacitance that is applicable to most switching station transformer station load capacity; On method of supplying power to; Also having the thresholding of discharging and recharging closes and opening function automatically; Guarantee that supply unit can ensure the regular event of protective device at the enough energy of system failure power failure back preservation when sending electricity once more in system.Surplus electric release function guarantee protection person when Installation and Debugging and maintenance is safe in utilization.
6) power module because integrated boosts and the anti-function such as send of rectification, the charging of permanent power and electric current.Possess the power output and the charge function that are applicable to most switching station transformer station, have overload protection simultaneously, load power consumption detects and the energy storage electric energy automaticallyes switch an anti-function of sending.Power module can directly be given the switching station electric, and with the supporting use of energy-storage module, possess the complete function of power station emergency power supply.
7) the rectification conditioning output sub-module adopts the staggered CCM pfc circuit technology of two-phase; Be used to export the maximum power of maximum 1500W; Simultaneously can obtain almost pure sinusoidal current waveform at input; Can not produce any interference and added burden to electrical network; Can not influence system's primary side power supply quality, take into full account transformer station and used requirement reliability.
8) permanent power charging submodule adopts high-performance fixed frequency current mode controller UC3843 as main control chip; Possesses isolation features when possessing constant current constant voltage output; And has an overpower protection characteristic; Even occur at charging capacitor under the condition of short trouble, utilize its good isolation characteristic can not influence the normal output of system's power supply.
9) the capacitance energy storage submodule adopts the super capacitor group to become forceful electric power direct current 220V energy-storage module with the voltage equalizing protection circuits built; Appropriate stored energy capacitance; Can guarantee the emergent use of most switching stations, and make the volume of module meet the operating position of most of switching stations more, practice thrift installing space.Rapid charge characteristic and heavy-current discharge characteristic make that the emergency character of DC power supply is stronger.The application of voltage equalizing protection circuit makes that the stability of DC power supply is higher, has the fault tolerance that single capacitance damage does not influence whole serviceability, and can accomplish non-maintaining use.
10) discharge and recharge the voltage threshold circuit that the control submodule is provided with 180V and 140V two-stage thresholding gear; Avoid that the capacitance energy storage submodule all discharges after the PT dead electricity; Ensure that the capacitance energy storage submodule leaves enough energy; Guarantee to close a floodgate to send under electricity and the system failure situation and enough work capacities are provided can for protective device and circuit breaker, the system that guarantees at least when closing a floodgate in fault protective device and circuit breaker can be within 0.5 second quick regular event once.Avoided simultaneously as direct current cabinet, after the PT outage, still the unnecessary for a long time direct current of DC load being supplied with, reduced the design capacity of energy-storage module, further reduced cost, simultaneously energy savings; The switch execution unit adopts the mode of a plurality of MOSFET parallel connections; Can cut-off up to 10A and above 220V high voltage direct current; Replace the DC power relay as the G9EB-1 of Omron; The cost that uses MOSFET is only for using 1/10th of DC power relay; And the power consumption of the drive circuit of MOSFET is littler than DC power relay coil power dissipation; Less than 0.1W, further reduced the own loss of continuous-current plant.
11) the power station inner breaker is being closed a floodgate or during sub-switching operation; The big electric current of transient state can appear in DC load; This moment is under the situation of rectification conditioning output sub-module power output deficiency; Capacitance energy storage submodule and rectification conditioning output sub-module can be supplied power to DC load jointly; Because super capacitor has the superpower characteristic of large current discharging capability; So can not cause situation such as rectification conditioning output sub-module overload or PT overload, safe and reliable.
12) said power station continuous-current plant based on super capacitor is provided with surplus electricity release submodule; Compare to direct current cabinet; It need just can not discharge the surplus electricity in the capacitance energy storage module by external equipment, has taken into full account to carry out fail safe and the ease for operation of device when safeguarding.
Description of drawings
Fig. 1 is a continuous-current plant structural representation of the present invention.
Fig. 2 is a rectification conditioning output module circuit diagram of the present invention.
Fig. 3 is permanent power charging submodular circuits figure of the present invention.
Fig. 4 is a capacitance energy storage submodular circuits block diagram of the present invention.
Fig. 5 is the control submodular circuits figure that discharges and recharges of the present invention.
Fig. 6 is that surplus electricity of the present invention discharges the submodular circuits block diagram.
Embodiment
Provide specific embodiment below in conjunction with accompanying drawing, further the present invention is elaborated.
Shown in Figure 1, supercapacitor-based power station DC power supply unit is set in the power plant and the DC voltage switchgear voltage transformer between the load, the DC power supply device includes a power plant and energy storage module power supply module, power module by the rectifier conditioning sub- module, constant power charging electronic module, a current foldback circuit, energy storage module consists of a capacitor energy storage sub-module, charge and discharge control sub-module, I release the power sub-module; current foldback circuit is a diode reverse voltage 1000V, the Maximum continuous state diode conduction current 10A, power module has an input terminal: Port 0, and two outputs: port 1 and port 2, the energy storage module has a connection port: port 3, where port 0 to connect high voltage switching station output voltage transformer cabinet, connect the DC load port 1, port 2 to port 3 connected energy storage module, port 0 conditioning sub-module and the rectifier connected to the input, the output rectifier conditioning sub-module filled with constant power electronic module input and port 1 is connected to the constant power output charging electronic module is connected to port 2, port 2 through current foldback circuit and the power supply module is connected to port 1, the diode's direction from port 2 to port 1, port 3 and the energy storage module discharge control sub-module is connected to the input of the charge and discharge control sub-module output terminal of capacitor energy storage sub-module connected to the input capacitor energy storage sub-module output and I released electrically connected to the input sub-module,
Described capacitance energy storage submodule is made up of n super capacitor and n group balance equalizer circuit; The super capacitor series connection; N group balance equalizer circuit is parallelly connected with n super capacitor respectively; The anode of the 1st super capacitor is as the positive pole of capacitance energy storage submodule, and the negative terminal of n super capacitor is as the negative pole of capacitance energy storage submodule.
As shown in Figure 2; The rectification conditioning output sub-module adopts the staggered CCM PFC technology of two-phase; The master chip pfc controller is the UCC28070 of TI company; The port one 4 (GDA) of UCC28070 links to each other with two MOSFET through two high-speed power mosfet driver TC4427AC, and the port one 7 (GDB) of UCC28070 links to each other with two MOSFET through two high-speed power mosfet driver TC4427AC.Concrete operation principle is: input ac voltage by rectifier bridge BD1 full-wave rectification, is formed the staggered pfc circuit of two-phase by inductance L 1, inductance L 2, MOSFET pipe Q1～Q4, diode D1, diode D2 and is accomplished boost function after choking-winding LF1, LF2 filtering; Instrument transformer CT1, CT2 form the current sampling loop; Form output voltage by R7, R8, R22 and detect the loop, amplify through master controller UCC28070 error ratio and realize the output voltage stabilizing; With transformer T1 and VIPER22A chip IC 8 is that main devices constitutes auxiliary source circuit, realizes the power supply to master chip.
As shown in Figure 3, permanent power charging submodule is managed Q1, MOSFET pipe Q2, transformer T2, diode D10, diode D11 by MOSFET and is formed the single-ended reverse exciting circuit; Resistance R 38, resistance R 39 are accomplished the output current sampling, and sampled signal after optocoupler PC1 isolates the pin 1 that transfers to former limit master control chip UC3843, is accomplished closed loop PWM control through operational amplifier IC3 processing and amplifying; With transformer T3 and VIPER22A chip IC 2 is that main devices constitutes auxiliary source circuit, realizes the power supply to master chip.
As shown in Figure 4; The capacitance energy storage submodule is made up of n super capacitor and n group balance equalizer circuit; The negative terminal of super capacitor 1 connects the anode of super capacitor 2; The negative terminal of super capacitor 2 connects the anode of super capacitor 3; By that analogy; The negative terminal of super capacitor n-1 connects the anode of super capacitor n; Balance equalizer circuit 1 is parallelly connected with super capacitor 1; Balance equalizer circuit 2 is parallelly connected with super capacitor 2; By that analogy; Balance equalizer circuit n is parallelly connected with super capacitor n; The anode of super capacitor 1 is as the positive pole of capacitance energy storage submodule port, and the negative terminal of super capacitor n is as the negative pole of capacitance energy storage submodule port.Because switching station scarcely can surpass 4 units (circuit breaker, energy storage motor and supporting protective device); So the design capacity of capacitance energy storage submodule will design with reference to the energy consumption that 4 units move once simultaneously; Field test data shows; The about 1.2A of the average operating current of once-through operation of a unit in the switching station; Operating time 3.6s (oscilloscope reading); Promptly average each about 220 * 1.2 * 3.6S ≈ of energy consumption 950J; Four units are all operated once then, and energy consumption is about 3800J; Be not less than 80% of rated operational voltage according to equipment work voltage and consider then have:
3800J=1/2 * C * (220
2-(220 * 80%)
2) draw C ≈ 0.436F
Therefore, the specification with capacitance energy storage submodule design 0.6F/250V is enough to satisfy the switching station need for electricity.In view of the above, super capacitor is selected the specification of 60F/2.7V for use, and the rated voltage of 2.7V is suitably step-down processing when series connection, is calculated value usually with 2.5V, and the number n of monomer super capacitor is also corresponding to calculate:
Module voltage=monomer capacitance voltage * monomer electric capacity quantity
Module voltage=250V=2.5V * 100
Be n=100
Ceiling voltage U Max＞270V that module can be born in short-term
Module capacitance amount=monomer capacitance/monomer electric capacity quantity
Module capacitance amount=60F/100=0.6F
Total energy storage capacity=0.5 * module capacitance amount * (module voltage) 2 when module expires electricity
＝0.5×0.6F×250V
2
＝18.75kJ
The break-make of voltage detector driven MOS pipe that mainly adopted the balance equalizer circuit realizes that balance all presses, the voltage detector of selecting for use realize that voltage will equate with the rated voltage of monomer electric capacity or lower slightly.
5, the charge and discharge control sub-module by the voltage threshold circuit, switch actuator components, the threshold voltage circuit has: a voltage threshold switch gear S1, the RR3, RR4, RR11, RR12 voltage divider circuit composed of, mainly by 7812 to achieve the power supply by RR13, RR14 achieve the reference voltage, the choice of a voltage comparator UA741 by RR8, RR9, RR10 and Q1 driven execution unit consisting of; switch from the high-power diode VD1 execution unit and a plurality of P-channel the MOSFET Q2 ~ Q4 connected in parallel, a plurality of P-channel MOSFET connected in parallel with a G-pole, a plurality of P-channel MOSFET connected in parallel with the D pole, a plurality of P-channel MOSFET connected in parallel with the S-pole, switching execution unit common S Extreme mouth (DC +) and the capacitor energy storage sub-module is connected, switch the implementation of parts of the common D extreme port (DC + ') is connected with the switching power supply, voltage threshold circuit has two threshold stalls, stalls high voltage setpoint used in the normal operating mode, a low voltage set value in case of emergency power supply gear used, specific settings can be determined according to practical application, normally high voltage setpoint stall located between the 180V ~ 190V, the low voltage setting stall value in 140V or so, the value set by adjusting the voltage divider circuit to achieve a resistor, the resistor can also be replaced regulator, such adjustment more convenient, but may cause some trouble debugging factory, to individually Adjust the resistance of the regulator, through the voltage threshold shift switch switch (S1) for gear shifting.
As shown in Figure 6; Surplus electricity discharges submodule by discharge switch, a plurality of resistance (11,12 ... Mn) form; Wherein an end (A) of discharge switch discharges a utmost point (general as anodal) of the port of submodule as surplus electricity; Discharge switch passes through an end (B) of some resistance another utmost point (generally as negative pole) as the port of surplus electricity release submodule, and resistance adopts the series, parallel mode to combine.Can not have influence on the operate as normal of capacitance energy storage submodule for the heating that guarantees to discharge; The power and the velocity of discharge that surplus electricity discharges submodule need be done a comprehensive consideration; By investigation with to user communication; Think that it is the time span that can bear that the capacitance energy storage submodule voltage that will be full of electricity about five minutes is reduced to below the safe voltage; So simultaneously for avoiding the surplus electricity release submodule short time to generate heat the excessive time of having won; The surplus electricity of this continuous-current plant discharges the metal film electric capacity that submodule has adopted 96 1.5K Ω/3W; The resistor matrix of having formed m * n=4 * 24; All-in resistance after the combination is about 250 Ω; Maximum current when surplus electricity discharges is no more than 1A; The maximum power dissipation of each resistance is 2.5W; Average power consumption is about 1W; Evidence, it meets design requirement.
The method of supplying power to of the power station continuous-current plant based on super capacitor of the present invention is: the AC power of the voltage transformer of high-tension switch cabinet (PT) input from the power station, accomplish rectification and boost function, the direct current of output voltage stabilization by the rectification conditioning output module; Permanent power charging submodule has been realized quick-charge function and isolation features (avoiding the destruction of capacitance short-circuit fault to system) to the capacitance energy storage submodule, avoids simultaneously importing the influence of transient current very big in the connection process to electrical network at power supply; Under PT input normal condition; The DC power supply of rectification conditioning output port module 1 output high stability uses for DC load such as motor energy storage and signal guidance; 2 pairs of capacitance energy storage submodules of rectification conditioning output port module real time charging; Be full of electricity back capacitance energy storage submodule and be in the charging hold mode; Increase in short-term and surpassed under the situation of rectification conditioning output module peak power output in the load need for electricity, rectification conditioning output module and capacitance energy storage submodule can be supplied power to DC load jointly; After the PT outage; The capacitance energy storage submodule can be immediately supplied power through discharging and recharging the counter outlet of delivering to said power station continuous-current plant based on super capacitor of control submodule the electric energy that stores to DC load; When the voltage of capacitance energy storage submodule is lower than the high tap position set point of the voltage threshold gear switch switch that discharges and recharges the control submodule; Discharge loop by discharging and recharging control submodule shutoff capacitance energy storage submodule stops DC load being supplied power; As voltage threshold gear switch switch is switched to low-grade location, the capacitance energy storage submodule will continue externally power supply, be lower than the low-grade location set point of voltage threshold gear switch switch until the voltage of capacitance energy storage submodule; Behind the PT service restoration, permanent power charging submodule begins the charging of capacitance energy storage submodule is full of the back and gets into holding state through discharging and recharging the control submodule immediately, discharges and recharges the cycle until the next one.
Present invention can be implemented in the power station direct current operative power source of power taking on the voltage transformer of high-tension switch cabinet; Based on super capacitor energy-storage; It can be directly installed on the switch cubicle; Not needing additionally increases the space, power station, has that instantaneous output is big, efficient is high, reliability is high, non-maintaining, characteristics such as volume is little, cost is low.
Claims (4)
1 A supercapacitor-based power station DC power supply unit, wherein the set of voltage transformers in the power plant and the DC voltage switchgear between the load, the DC power supply device includes a power plant and energy storage module power supply module, power module by the rectifier conditioning sub-module, constant power charging electronic module, a current foldback circuit, energy storage module consists of a capacitor energy storage sub-module, charge and discharge control sub-module, I release the power sub-module; current foldback circuit is a diode reverse voltage 1000V , the diode maximum continuous conduction current 10A, power module has an input terminal: Port 0, and two outputs: port 1 and port 2, the energy storage module has a connection port: port 3, where port 0 to connect power stations High Voltage Switchgear voltage transformer output terminal connected to the DC load port 1, port 2 to port 3 connected energy storage module, port 0 conditioning sub-module and the rectifier connected to the input, the output rectifier conditioning sub-module filled with constant power electronic module input terminal and port 1 is connected to the constant power output charging electronic module is connected to port 2, port 2 through current foldback circuit and the power supply module is connected to port 1, the diode's direction from port 2 to port 1, port 3 and the energy storage module charge and discharge control sub-module is connected to the input of the charge and discharge control sub-module output terminal of capacitor energy storage sub-module connected to the input capacitor energy storage sub-module output and I released electrically connected to the input sub-module,
Described capacitance energy storage submodule is made up of n super capacitor and n group balance equalizer circuit; The super capacitor series connection; N group balance equalizer circuit is parallelly connected with n super capacitor respectively; The anode of the 1st super capacitor is as the positive pole of capacitance energy storage submodule, and the negative terminal of n super capacitor is as the negative pole of capacitance energy storage submodule.
2. the power station continuous-current plant based on super capacitor according to claim 1; It is characterized in that said discharge and recharge control submodule form by voltage threshold circuit and switch execution unit; The voltage threshold circuit is by voltage threshold gear switch switch; Bleeder circuit; Working power; Reference voltage; Voltage comparator and execution unit drive to be formed; Working power inserts bleeder circuit and reference voltage circuit; Diverter switch inserts bleeder circuit; Bleeder circuit and reference voltage insert voltage comparator; The voltage comparator output inserts the execution unit drive circuit, and the execution unit drive circuit inserts the switch execution unit; Wherein execution unit drives and is composed in parallel by heavy-duty diode, a plurality of P channel mosfet; The G utmost point of said a plurality of P channel mosfets, D level, S level are connected in parallel respectively; The common S of switch execution unit links to each other with the capacitance energy storage submodule for extreme mouthful; The common D of switch execution unit links to each other with the Switching Power Supply supply for extreme mouthful; The voltage threshold circuit has two-stage thresholding gear, switches through voltage threshold gear switch switch.
3. the power station continuous-current plant based on super capacitor according to claim 1 and 2; It is characterized in that described surplus electricity discharges submodule and is made up of discharge switch and m * n resistance; N resistance series connection is one group; The parallel connection again of m group series resistance; Obtain the resistance battle array; Discharge switch is connected with said resistance battle array, and the disjunct end of discharge switch and resistance battle array is respectively two electrodes that surplus electricity discharges submodule.
4. the method for supplying power to of each described power station continuous-current plant based on super capacitor of use such as claim 1-3; It is characterized in that: the voltage transformer output AC power source of power station high-tension switch cabinet; Input power module; Carry out rectification and boost the direct current of output voltage stabilization by the rectification conditioning submodule; Said direct current is imported permanent power charging submodule and DC load respectively; Permanent power charging submodule charges through discharging and recharging control submodule control capacitance energy storage submodule; Be full of electricity back capacitance energy storage submodule and be in the charging hold mode; Increase in short-term and surpassed under the situation of rectification conditioning output module peak power output in the DC load need for electricity, power module and energy-storage module are supplied power to DC load jointly; When the voltage transformer of power station high-tension switch cabinet cut off the power supply, energy-storage module was returned to port one through discharging and recharging the control submodule by the electric current feedback circuit with the electric energy that stores, and supplies power to DC load; Discharge and recharge the control submodule and be provided with two voltage threshold of height; Switch by the gear switch switch; When the voltage of energy-storage module is lower than the high voltage thresholding that discharges and recharges the control submodule; By the discharge loop that discharges and recharges control submodule shutoff capacitance energy storage submodule; Stop DC load being supplied power; This moment is as switching to low-voltage thresholding gear with voltage threshold gear switch switch; Then the capacitance energy storage submodule will continue externally power supply, be lower than the low-voltage thresholding of setting until the voltage of capacitance energy storage submodule; Behind the voltage transformer service restoration of power station high-tension switch cabinet, permanent power charging submodule begins the energy-storage module charging is full of the back and gets into holding state through discharging and recharging the control submodule immediately, discharges and recharges the cycle until the next one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203456376U CN202197226U (en) | 2011-09-14 | 2011-09-14 | Power station direct current power supply device based on super capacitor |
| CN2011102732034A CN102355042B (en) | 2011-09-14 | 2011-09-14 | Super-capacitor-based direct current power device of power station and power supply method thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203456376U CN202197226U (en) | 2011-09-14 | 2011-09-14 | Power station direct current power supply device based on super capacitor |
| CN2011102732034A CN102355042B (en) | 2011-09-14 | 2011-09-14 | Super-capacitor-based direct current power device of power station and power supply method thereof |
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| Publication Number | Publication Date |
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| CN102355042A true CN102355042A (en) | 2012-02-15 |
| CN102355042B CN102355042B (en) | 2013-10-09 |
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| CN2011203456376U Withdrawn - After Issue CN202197226U (en) | 2011-09-14 | 2011-09-14 | Power station direct current power supply device based on super capacitor |
| CN2011102732034A Active CN102355042B (en) | 2011-09-14 | 2011-09-14 | Super-capacitor-based direct current power device of power station and power supply method thereof |
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| CN2011203456376U Withdrawn - After Issue CN202197226U (en) | 2011-09-14 | 2011-09-14 | Power station direct current power supply device based on super capacitor |
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| Publication number | Publication date |
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| CN102355042B (en) | 2013-10-09 |
| CN202197226U (en) | 2012-04-18 |
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Address after: 210012 3 of Tian Shu Science Park, 170-1 software Avenue, Yuhuatai District, Nanjing, Jiangsu. Patentee after: NANJING TIANSU AUTOMATION CONTROL SYSTEM Co.,Ltd. Address before: 3 building 05, Xincheng Science Park, No. 69 Olympic Sports Avenue, Jiangsu, Nanjing 210019, China Patentee before: NANJING TIANSU AUTOMATION CONTROL SYSTEM Co.,Ltd. |