CN201774266U - Energy-storage control system - Google Patents

Energy-storage control system Download PDF

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Publication number
CN201774266U
CN201774266U CN 201020286857 CN201020286857U CN201774266U CN 201774266 U CN201774266 U CN 201774266U CN 201020286857 CN201020286857 CN 201020286857 CN 201020286857 U CN201020286857 U CN 201020286857U CN 201774266 U CN201774266 U CN 201774266U
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China
Prior art keywords
unit
turn
super capacitor
power
battery
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Expired - Lifetime
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CN 201020286857
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Chinese (zh)
Inventor
冯汉春
王国刚
刘振强
苗文华
郭淼
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Beijing Guodian Futong Science and Technology Development Co Ltd
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Beijing Guodian Futong Science and Technology Development Co Ltd
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Priority to CN 201020286857 priority Critical patent/CN201774266U/en
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Abstract

An energy-storage control system comprises a first charging and discharging control unit, a second charging and discharging control unit, a detecting unit and an energy-storage control unit, wherein the first charging and discharging control unit connected with a power grid interface unit and a battery unit is used for controlling charging and discharging of the battery unit, the second charging and discharging control unit connected with the power grid interface unit and a super-capacitor unit is used for controlling charging and discharging of the super-capacitor unit, the detecting unit is used for detecting power grid voltage or power and energy stored by the battery unit and the super-capacitor unit in real time, and the energy-storage control unit is used for joint control for the battery unit and the super-capacitor unit by the aid of the power grid interface unit, the first charging and discharging control unit, the second charging and discharging control unit according to the power grid voltage or power and the energy stored by the battery unit and the super-capacitor unit detected by the detecting unit when the power grid voltage or power is out of upper and lower limits. The energy-storage control system realizes preferential control of charging and discharging of super-capacitor unit, can be applied to peak shaving and energy storage, can also solve the problem of out-of-limit abnormal fluctuation of the power grid voltage or power, and thoroughly prolongs the service life of an energy-storage system battery.

Description

Energy storage control system
Technical field
The utility model relates to a kind of electric energy control device, particularly a kind of energy storage control system.
Background technology
Energy storage control system is widely applied to generation of electricity by new energy as the important component part of intelligent grid, is used to solve the accessibility problem of electrical network; Solve peak valley electric weight difference problems of too.Adopt battery, super capacitor, or mechanical energy storage etc. is used for the storage release management of electric energy, needs the energy storage control system device, has different control methods at different application.
Known city of concentrating at load, night, power consumption was less than the power consumption on daytime, form very big peak-valley difference electric weight, general city electricity consumption difference is about 30%, as the peak-valley difference in Shanghai City about 40%, for eliminating excessive some problems that cause of peak valley electric weight, Utilities Electric Co. implements known time-of-use tariffs, encourages many electricity consumptions at user's night; China Patent No. CN2444331Y discloses a kind of user and has surveyed the peak supply unit, and it mainly solves low-voltage customer store power at night, and daytime, peak of power consumption was sent electric power, i.e. the peak regulation stored energy application; It mainly adopts storage battery to carry out the storage of electric energy and electrical network is carried out feed.And in wind power generation field, because there is intermittent problems in wind power generation, can't provide lasting and stable wind energy to generate electricity, and in field of solar thermal power generation, because the intensity of sunshine instability time can't guarantee the solar energy that provides stable in generating, therefore both all can cause the instability of generating, thereby cause unbalanced supply-demand, and closely line voltage and the power unusual fluctuations that bring exceed standard; Adopt the mode of accumulator cell charging and discharging to charging and electrical network being carried out feed in this patent, since storage battery itself can not fast charging and discharging characteristic, therefore, can't suppress the unusual fluctuations of voltage and power apace, so that the problem that line voltage that can't solve unbalanced supply-demand well and brought and power unusual fluctuations exceed standard; In addition, adopt storage battery to discharge and recharge continually, the number of times that discharges and recharges of battery is reduced, thus the useful life that can reduce storage battery greatly.Chinese patent CN1858955A discloses a kind of series-type voltage quality disturbing generating device, comprises converter transformer in parallel, three phase full bridge PWM current transformer, DC chopper and super capacitor energy-storage system, single-phase full bridge PWM current transformer group, series connection injection transformer group.Can solve preferably because the problem that the line voltage unusual fluctuations that the electric energy unbalanced supply-demand brings exceed standard.Though single super capacitor has relatively large energy storage capacity, when the peak regulation storage application, can't accomplish the energy storage capacity identical with battery, the mode that has the parallel connection of using a plurality of super capacitors simultaneously only solves, and has so then increased cost greatly.
The utility model content
For this reason, the technical problems to be solved in the utility model is to propose a kind ofly can carry out the peak regulation stored energy application, can solve the problem that line voltage or power unusual fluctuations exceed standard effectively by fast charging and discharging again, has the energy storage control system in high useful life.
Therefore, a kind of energy storage control system of the present utility model comprises: two ends are connected with battery unit with the electrical network interface unit respectively and are used to control that described battery unit discharges and recharges first discharges and recharges control unit;
Also comprise two ends respectively with described electrical network interface unit being used to of being connected with the super capacitor unit control that described super capacitor unit discharges and recharges second discharge and recharge control unit;
Detecting unit is used in real time the storage power of line voltage or power and described super capacitor unit is detected;
The energy storage control unit, according to detected line voltage of described detecting unit or power, the storage power of described super capacitor unit discharges and recharges control unit and described second by described electrical network interface unit, described first and discharges and recharges control unit and realize described battery unit and described super capacitor unit are discharged and recharged control; Wherein said discharging and recharging is controlled to be when exceeding standard on detected line voltage or the power, the charge circuit of opening described super capacitor charges, and close described super capacitor discharge loop, if detecting unit detects described super capacitor unit when being full of electricity, described line voltage or power still exceed standard, and the charge circuit of then opening battery unit charges; When exceeding standard under detected line voltage or the power, the discharge loop of opening described super capacitor unit is to the electrical network feed, and the charge circuit of closing described super capacitor unit, if detecting unit detects described super capacitor unit electric energy drain after, described line voltage or power still are lower than normal voltage or power, and the discharge loop of then opening battery unit carries out feed to electrical network.
Above-mentioned energy storage control system, described electrical network interface unit comprise a three phase full bridge PWM current transformer.
Above-mentioned energy storage control system, described first to discharge and recharge control unit be the first single-phase PWM current transformer, described second to discharge and recharge control unit be the second single-phase PWM current transformer.
Above-mentioned energy storage control system, the described first single-phase PWM current transformer is made of the 7th turn-off device k7 and the 8th turn-off device k8 series connection, and wherein the anode of the 7th turn-off device K7 links to each other with the negative electrode of the 8th turn-off device k8;
The described second single-phase PWM current transformer is made of the 9th turn-off device k9 and the tenth turn-off device k10 series connection, and wherein the anode of the 9th turn-off device k9 links to each other with the negative electrode of the tenth turn-off device k10;
Described battery unit comprises at least one battery, and the positive pole of described battery is connected with the anode of described the 9th turn-off device k9, and the negative pole of described battery is connected with the anode of described the tenth turn-off device k10;
Described super capacitor unit comprises at least one super capacitor, and described super capacitor one end is connected with the anode of described the 7th turn-off device k7, and the other end is connected with the anode of described the 8th turn-off device k8;
The negative electrode of described the 7th turn-off device k7 is connected with the negative electrode of described the 9th turn-off device k9, and the anode of described the 7th turn-off device k7 is connected with the anode of described the 9th turn-off device k9;
The described three phase full bridge PWM current transformer of described electrical network interface unit is interconnected to constitute by the first turn-off device k1, the second turn-off device k2, the 3rd turn-off device k3, the 4th turn-off device k4, the 5th turn-off device k5, the 6th turn-off device k6; The two-phase end of described three phase full bridge PWM current transformer is connected with the negative electrode of described the 7th turn-off device k7 and the anode of described the 8th turn-off device k8 respectively.
Technique scheme of the present utility model has the following advantages compared to existing technology:
At line voltage or power is upper and lower when exceeding standard, realize preferentially described super capacitor unit being discharged and recharged control; When detecting line voltage or electric current when being in peak of power consumption or low power consumption, discharge and recharge control unit and open the charging and discharging circuit of described big capacitor batteries unit and come electrical network is discharged or charges by controlling described first, controlling described second simultaneously discharges and recharges control unit and closes super capacitor unit charging and discharging circuit, can effectively avoid battery unit frequently to discharge and recharge work, thereby the number of times that discharges and recharges of battery is not reduced, battery life can be not meaningless decay, under the situation that satisfies the tank voltage and the power permission fluctuation range that is incorporated into the power networks, reach the purpose of protection battery, guaranteed the long-term useful life of energy storage control system; To the demand of electric energy with when alleviating low power consumption unnecessary electric energy is stored in the time of can alleviating peak of power consumption well again, closely solved the problem of peak regulation stored energy application.In addition, the utility model adopts super capacitor unit and battery unit coupling, and only adopts battery to discharge and recharge to eliminate the line voltage unusual fluctuations to exceed standard and keeps the power-balance that is incorporated into the power networks and compare, and its governing speed is faster.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail below.
Fig. 1 is the schematic diagram of energy storage control system;
Fig. 2 is the circuit diagram of energy storage control system;
Embodiment
Energy storage control system as shown in Figure 1 comprises: two ends are connected with battery unit with the electrical network interface unit respectively and are used to control that described battery unit discharges and recharges first discharges and recharges control unit;
Also comprise two ends respectively with described electrical network interface unit being used to of being connected with the super capacitor unit control that described super capacitor unit discharges and recharges second discharge and recharge control unit;
Detecting unit is used in real time the storage power of line voltage or power and described super capacitor unit is detected; In the present embodiment, the detection of described power can calculate by detecting corresponding line voltage and electric current respectively.
The energy storage control unit, according to detected line voltage of described detecting unit or power, the storage power of described super capacitor unit discharges and recharges control unit and described second by described electrical network interface unit, described first and discharges and recharges control unit and realize described battery unit and described super capacitor unit are discharged and recharged control; Wherein said discharging and recharging is controlled to be when exceeding standard on detected line voltage or the power, the charge circuit of opening described super capacitor charges, and close described super capacitor discharge loop, if detecting unit detects described super capacitor unit when being full of electricity, described line voltage or power exceed standard on still, and the charge circuit of then opening battery unit charges; When exceeding standard under detected line voltage or the power, the discharge loop of opening described super capacitor unit is to the electrical network feed, and the charge circuit of closing described super capacitor unit, if detecting unit detects described super capacitor unit electric energy drain after, described line voltage or power still exceed standard down, and the discharge loop of then opening battery unit carries out feed to electrical network.
The above-mentioned described detecting unit that is used to detect battery unit and super capacitor unit storage power comprises self energy storage checkout gear of described battery unit and super capacitor unit.
As shown in Figure 2, described electrical network interface unit comprises a three phase full bridge PWM current transformer.Described first to discharge and recharge control unit be the first single-phase PWM current transformer, and described second to discharge and recharge control unit be the second single-phase PWM current transformer.The described first single-phase PWM current transformer is made of the 7th turn-off device k7 and the 8th turn-off device k8 series connection, and wherein the anode of the 7th turn-off device K7 links to each other with the negative electrode of the 8th turn-off device k8; The described second single-phase PWM current transformer is made of the 9th turn-off device k9 and the tenth turn-off device k10 series connection, and wherein the anode of the 9th turn-off device k9 links to each other with the negative electrode of the tenth turn-off device k10; The negative electrode of described the 7th turn-off device k7 is connected with the two ends of the first electric capacity c4 respectively with described the 8th turn-off device k8 anode.The negative electrode of described the 9th turn-off device k9 is connected with the two ends of the second electric capacity YM respectively with described the tenth turn-off device k10 anode.
Described battery unit comprises a battery BT, and the positive pole of described battery BT is connected with the anode of described the 9th turn-off device k9 by the 5th inductance L 5, and the negative pole of described battery BT is connected with the anode of described the tenth turn-off device k10;
Described super capacitor unit comprises a super capacitor CF, and described super capacitor CF one end is connected with the anode of described the 7th turn-off device k7 by the 4th inductance L 4, and the other end is connected with the anode of described the 8th turn-off device k8;
The negative electrode of described the 7th turn-off device k7 is connected with the negative electrode of described the 9th turn-off device k9, and the anode of described the 7th turn-off device k7 is connected with the anode of described the 9th turn-off device k9;
The described three phase full bridge PWM current transformer of described electrical network interface unit is interconnected to constitute by the first turn-off device k1, the second turn-off device k2, the 3rd turn-off device k3, the 4th turn-off device k4, the 5th turn-off device k5, the 6th turn-off device k6; The two-phase end of described three phase full bridge PWM current transformer is connected with the negative electrode of described the 7th turn-off device k7 and the anode of described the 8th turn-off device k8 respectively, the a of described three phase full bridge PWM current transformer, b, c are mutually respectively by first inductance L, 1, the second inductance L 2, the 3rd inductance L 3, and the 11 turn-off device k11, the 12 turn-off device k12, the 13 turn-off device k13 and electrical network A, B, C is connected; And be respectively equipped with the first electric capacity of voltage regulation c1 on every phase branch road, the second electric capacity of voltage regulation c2, the 3rd electric capacity of voltage regulation c3.
Described energy storage control unit is controlled above-mentioned turn-off device k1, k2, k3, k4 according to described detecting unit to the testing result of line voltage or electric current respectively, k5, k6, k7, k8, the duty cycle of switching of k9 and k10, thus discharging and recharging of described super capacitor CF and described battery BT controlled.
Its concrete course of work is as follows:
Detecting unit detects each voltage of output mutually in real time, when surpassing the voltage of setting, described energy storage control unit is closed the output of current duty ratio, angle adjustment with the leading line voltage of inverter output voltage of PWM current transformer is zero simultaneously, when next duty ratio is exported, be adjusted into and be not more than 1/2 original value, even in this duty ratio output superpotential situation takes place still, repeat this process, no longer cross the border up to voltage, this moment, energy storage control system was along with the voltage of electrical network continues operation, and to electrical network output reactive power, was used to improve the level of line voltage.In the process that line voltage recovers, by the climbing of detection of grid voltage, the duty ratio of corresponding increase correspondence reaches the purpose of following the tracks of line voltage.Return at line voltage and to allow to recover the angle of the leading line voltage of current transformer output voltage gradually in the fluctuation range, the continuous output of the power of realizing being incorporated into the power networks.When raising for the unexpected condition of instant error of line voltage in running or power; when detecting unit detects exceeding standard of the line voltage or the power rate of rise; at first close the battery unit output circuit; open the charge circuit of super capacitor unit then; open the rectification input function of current transformer again; by absorbing the energy of line voltage; reach the purpose of protection equipment; after the super capacitor charging finishes; the part short-time energy that can not all absorb for the super capacitor unit; the charge circuit of then opening battery is absorbed by battery unit, and effectively electric protection equipment is not damaged.
At line voltage or power is upper and lower when exceeding standard, realize preferentially described super capacitor unit being discharged and recharged control; When detecting line voltage or electric current when being in peak of power consumption or low power consumption, discharge and recharge control unit and open the charging and discharging circuit of described big capacitor batteries unit and come electrical network is discharged or charges by controlling described first, controlling described second simultaneously discharges and recharges control unit and closes super capacitor unit charging and discharging circuit, can effectively avoid battery unit frequently to discharge and recharge work, thereby the number of times that discharges and recharges of battery is not reduced, battery life can be not meaningless decay, under the situation that satisfies the tank voltage and the power permission fluctuation range that is incorporated into the power networks, reach the purpose of protection battery, guaranteed the long-term useful life of energy storage control system; To the demand of electric energy with when alleviating low power consumption unnecessary electric energy is stored in the time of can alleviating peak of power consumption well again, closely solved the problem of peak regulation stored energy application.In addition, the utility model adopts super capacitor unit and battery unit coupling, and only adopts battery to discharge and recharge to eliminate the line voltage unusual fluctuations to exceed standard and keeps the power-balance that is incorporated into the power networks and compare, and its governing speed is faster.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to execution mode.For those of ordinary skill in the field, can also make other changes in different forms according to varying in size of equipment on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And conspicuous variation of being extended out thus or change still are among the protection range of the utility model creation.

Claims (4)

1. energy storage control system comprises:
Two ends are connected with battery unit with the electrical network interface unit respectively and are used to control that described battery unit discharges and recharges first discharges and recharges control unit;
It is characterized in that: also comprise
Two ends respectively with described electrical network interface unit being used to of being connected with the super capacitor unit control that described super capacitor unit discharges and recharges second discharge and recharge control unit;
Detecting unit is used in real time the storage power of line voltage or power and described super capacitor unit is detected;
The energy storage control unit, according to detected line voltage of described detecting unit or power, the storage power of described super capacitor unit discharges and recharges control unit and described second by described electrical network interface unit, described first and discharges and recharges control unit and realize described battery unit and described super capacitor unit are discharged and recharged control; Wherein said discharging and recharging is controlled to be when exceeding standard on detected line voltage or the power, the charge circuit of opening described super capacitor charges, and close described super capacitor discharge loop, if detecting unit detects described super capacitor unit when being full of electricity, described line voltage or power still are in and exceed standard, and the charge circuit of then opening battery unit charges; When exceeding standard under detected line voltage or the power, the discharge loop of opening described super capacitor unit is to the electrical network feed, and the charge circuit of closing described super capacitor unit, if detecting unit detects described super capacitor unit electric energy drain after, described line voltage or power exceed standard under still being in, and the discharge loop of then opening battery unit carries out feed to electrical network.
2. energy storage control system according to claim 1 is characterized in that:
Described electrical network interface unit comprises a three phase full bridge PWM current transformer.
3. according to claim 1 or 2 arbitrary described energy storage control systems, it is characterized in that:
Described first to discharge and recharge control unit be the first single-phase PWM current transformer, and described second to discharge and recharge control unit be the second single-phase PWM current transformer.
4. energy storage control system according to claim 3 is characterized in that:
The described first single-phase PWM current transformer is made of the 7th turn-off device (k7) and the 8th turn-off device (k8) series connection, and wherein the anode of the 7th turn-off device (K7) links to each other with the negative electrode of the 8th turn-off device (k8);
The described second single-phase PWM current transformer is made of the 9th turn-off device (k9) and the tenth turn-off device (k10) series connection, and wherein the anode of the 9th turn-off device (k9) links to each other with the negative electrode of the tenth turn-off device (k10);
Described battery unit comprises at least one battery, and the positive pole of described battery is connected with the anode of described the 9th turn-off device (k9), and the negative pole of described battery is connected with the anode of described the tenth turn-off device (k10);
Described super capacitor unit comprises at least one super capacitor, and described super capacitor one end is connected with the anode of described the 7th turn-off device (k7), and the other end is connected with the anode of described the 8th turn-off device (k8);
The negative electrode of described the 7th turn-off device (k7) is connected with the negative electrode of described the 9th turn-off device (k9), and the anode of described the 7th turn-off device (k7) is connected with the anode of described the 9th turn-off device (k9);
The described three phase full bridge PWM current transformer of described electrical network interface unit is interconnected to constitute by first turn-off device (k1), second turn-off device (k2), the 3rd turn-off device (k3), the 4th turn-off device (k4), the 5th turn-off device (k5), the 6th turn-off device (k6); The two-phase end of described three phase full bridge PWM current transformer is connected with the negative electrode of described the 7th turn-off device (k7) and the anode of described the 8th turn-off device (k8) respectively.
CN 201020286857 2010-08-10 2010-08-10 Energy-storage control system Expired - Lifetime CN201774266U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101924372A (en) * 2010-08-10 2010-12-22 北京国电富通科技发展有限责任公司 Energy storage control system
CN102832634A (en) * 2012-08-28 2012-12-19 华北电力大学 Combined type power stabilizing system based on super-capacitor and high-capacity energy storing device
CN102882221A (en) * 2012-09-27 2013-01-16 广东易事特电源股份有限公司 Supercapacitor and storage battery mixed energy-storing energy management circuit in photovoltaic grid-connected power generation
CN104467199A (en) * 2015-01-04 2015-03-25 南车株洲电力机车有限公司 Energy-storage power supply and energy-storage power supply system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101924372A (en) * 2010-08-10 2010-12-22 北京国电富通科技发展有限责任公司 Energy storage control system
CN101924372B (en) * 2010-08-10 2013-05-29 北京国电富通科技发展有限责任公司 Energy storage control system
CN102832634A (en) * 2012-08-28 2012-12-19 华北电力大学 Combined type power stabilizing system based on super-capacitor and high-capacity energy storing device
CN102832634B (en) * 2012-08-28 2015-07-15 华北电力大学 Combined type power stabilizing system based on super-capacitor and high-capacity energy storing device
CN102882221A (en) * 2012-09-27 2013-01-16 广东易事特电源股份有限公司 Supercapacitor and storage battery mixed energy-storing energy management circuit in photovoltaic grid-connected power generation
CN102882221B (en) * 2012-09-27 2014-12-31 广东易事特电源股份有限公司 Supercapacitor and storage battery mixed energy-storing energy management circuit in photovoltaic grid-connected power generation
CN104467199A (en) * 2015-01-04 2015-03-25 南车株洲电力机车有限公司 Energy-storage power supply and energy-storage power supply system
CN104467199B (en) * 2015-01-04 2017-08-18 南车株洲电力机车有限公司 A kind of accumulation power supply and accumulation power supply system

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