CN101924372B - Energy storage control system - Google Patents
Energy storage control system Download PDFInfo
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- CN101924372B CN101924372B CN 201010249427 CN201010249427A CN101924372B CN 101924372 B CN101924372 B CN 101924372B CN 201010249427 CN201010249427 CN 201010249427 CN 201010249427 A CN201010249427 A CN 201010249427A CN 101924372 B CN101924372 B CN 101924372B
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Abstract
The invention relates to an energy storage control system comprising 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 is connected with an electric network interface unit and a battery unit and is used for controlling the battery unit to charge and discharge; the second charging and discharging control unit is connected with the electric network interface unit and a super-capacitor unit and is used for controlling the super-capacitor unit to charge and discharge; the detecting unit is used for detecting the voltage or the power of an electric network and the storage energy of the battery unit and the super-capacitor unit; and the energy storage control unit is used for jointly controlling the battery unit and the super-capacitor unit according to the detected electric network voltage or power of the detecting unit and the storage energy of the battery unit and the super-capacitor unit through the network interface unit, the charging and discharging control unit and the second charging and discharging control unit when the electric network voltage or power is superstandard up and down. The energy storage control system realizes the preferential charging and discharging control of the super-capacitor unit in order to carry out peak-regulating and energy-storing application, solves the problem of superstandard unusual fluctuation of the electric network voltage or power and thoroughly increases the service life of an energy-storage system battery.
Description
Technical field
The present invention 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 for solving the accessibility problem of electrical network; Solve the poor problems of too of peak-valley electric energy.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 for different application.
Known city of concentrating at load, night, power consumption was less than the power consumption on daytime, form very large peak-valley difference electric weight, general city electricity consumption difference is about 30%, such as the peak-valley difference in Shanghai City about 40%, for eliminating excessive some problems that cause of peak-valley electric energy, Utilities Electric Co. implements known time-of-use tariffs, encourages multiplex electricity 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, can't guarantee the solar energy that provides stable because intensity of sunshine is unstable in when generating, therefore both all can cause the unstable of generating, thereby cause unbalanced supply-demand, and the line voltage and the power unusual fluctuations that closely 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 rapidly the unusual fluctuations of voltage and power, so that can't solve well the problem that line voltage that unbalanced supply-demand brings 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 greatly reduce storage battery.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.Although 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 simultaneously a plurality of super capacitors only solves, and has so then greatly increased cost.
Summary of the invention
For this reason, the technical problem to be solved in the present invention is to propose a kind ofly can carry out the peak regulation stored energy application, can effectively solve the problem that line voltage or power unusual fluctuations exceed standard 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 invention comprises: two ends are connected with battery unit with the electrical network interface unit respectively and are used for controlling 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 for 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 be used in real time to line voltage or power, and the storage power of described super capacitor unit detects;
The energy storage control unit, according to the 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, open the discharge loop of described super capacitor unit 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, described the second 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;
Described the first 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, the anodic bonding of the positive pole of described battery and described the 9th turn-off device k9, the anodic bonding of the negative pole of described battery and described the tenth turn-off device k10;
Described super capacitor unit comprises at least one super capacitor, the anodic bonding of described super capacitor one end and described the 7th turn-off device k7, the anodic bonding of the other end and 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, the anodic bonding of the anode of described the 8th turn-off device k8 and described the tenth turn-off device k10;
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 respectively with the negative electrode of described the 7th turn-off device k7 and the anodic bonding of described the 8th turn-off device k8.
Technique scheme of the present invention 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 large capacitor batteries unit and come electrical network is discharged or charges by controlling described first, controlling simultaneously described second 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, in the situation that satisfies tank voltage and the power allowable fluctuation range that is incorporated into the power networks, reach the purpose of protection battery, guaranteed the Long Service Life of energy storage control system; To the demand of electric energy, and unnecessary electric energy is stored when alleviating low power consumption 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 keep the power-balance that is incorporated into the power networks and compare, and its governing speed is faster.
Description of drawings
For content of the present invention is more likely to be clearly understood, the below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation.
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 for controlling 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 for 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 be used in real time to line voltage or power, and the storage power of described super capacitor unit detects; In the present embodiment, the detection of described power can calculate by detecting respectively corresponding line voltage and electric current.
The energy storage control unit, according to the 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, open the discharge loop of described super capacitor unit 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.
Above-mentioned described detecting unit for detection of 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.Described the second 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; Described the first 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 be connected the 8th turn-off device k8 anode and be connected with the two ends of the first electric capacity c4 respectively.The negative electrode of described the 9th turn-off device k9 be connected the tenth turn-off device k10 anode and be connected with the two ends of the second electric capacity YM respectively.
Described battery unit comprises a battery BT, and the positive pole of described battery BT is by the anodic bonding of the 5th inductance L 5 with described the 9th turn-off device k9, the anodic bonding of the negative pole of described battery BT and described the tenth turn-off device k10;
Described super capacitor unit comprises a super capacitor CF, and described super capacitor CF one end is by the anodic bonding of the 4th inductance L 4 with described the 7th turn-off device k7, the anodic bonding of the other end and 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, the anodic bonding of the anode of described the 8th turn-off device k8 and described the tenth turn-off device k10.
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 respectively with the negative electrode of described the 7th turn-off device k7 and the anodic bonding of described the 8th turn-off device k8, the a of described three phase full bridge PWM current transformer, b, c are mutually respectively by the 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, k9, and the duty cycle of switching of k10, thus discharging and recharging of described super capacitor CF and described battery BT controlled.
Its specific works process is as follows:
Detecting unit detects each mutually voltage of output 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 output, be adjusted into and be not more than 1/2 original value, even in this duty ratio output superpotential situation occurs still, repeat this process, until voltage no longer crosses the border, this moment, energy storage control system was along with the voltage of electrical network continues operation, and to the electrical network output reactive power, was used for improving 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.In line voltage returns to allowable fluctuation range, recover gradually the angle of the leading line voltage of current transformer output voltage, the continuous wave output of the power of realizing being incorporated into the power networks.During for line voltage in running or the unexpected condition of instant error rising of power; when detecting unit detects exceeding standard of line voltage or the power rate of rise; at first close the battery unit output circuit; then open the charge circuit of super capacitor unit; open again the rectification input function of current transformer; by absorbing the energy of line voltage; reach the purpose of protection equipment; after the super capacitor charging is complete; 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 large capacitor batteries unit and come electrical network is discharged or charges by controlling described first, controlling simultaneously described second 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, in the situation that satisfies tank voltage and the power allowable fluctuation range that is incorporated into the power networks, reach the purpose of protection battery, guaranteed the Long Service Life of energy storage control system; To the demand of electric energy, and unnecessary electric energy is stored when alleviating low power consumption 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 keep the power-balance that is incorporated into the power networks and compare, and its governing speed is faster.
Obviously, above-described embodiment only is for example clearly is described, and is not the restriction 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 all execution modes exhaustive.And the apparent variation of being extended out thus or change still are among the protection range of the invention.
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 for controlling 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 for 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 be used in real time to line voltage or power, and the storage power of described super capacitor unit detects;
The energy storage control unit, according to the 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, open the discharge loop of described super capacitor unit 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;
Wherein, detecting unit detects each mutually voltage of output 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 output, be adjusted into and be not more than 1/2 original duty cycle value, even in this duty ratio output superpotential situation occurs still, repeat this process, until voltage no longer crosses the border, this moment, energy storage control system was along with the voltage of electrical network continues operation, and to the electrical network output reactive power; In the process that line voltage recovers, by the climbing of detection of grid voltage, the duty ratio of corresponding increase correspondence realizes line voltage is followed the tracks of; In line voltage returns to allowable fluctuation range, recover gradually the angle of the leading line voltage of current transformer output voltage, the continuous wave output of the power of realizing being incorporated into the power networks.
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. arbitrary described energy storage control system according to claim 1 and 2 is characterized in that:
Described first to discharge and recharge control unit be the first single-phase PWM current transformer, and described second discharges and recharges control
The unit is the second single-phase PWM current transformer.
4. energy storage control system according to claim 3 is characterized in that:
Described the second 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);
Described the first 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, the anodic bonding of the positive pole of described battery and described the 9th turn-off device (k9), the anodic bonding of the negative pole of described battery and described the tenth turn-off device (k10);
Described super capacitor unit comprises at least one super capacitor, the anodic bonding of described super capacitor one end and described the 7th turn-off device (k7), the anodic bonding of the other end and 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), the anodic bonding of the anode of described the 8th turn-off device (k8) and described the tenth turn-off device (k10);
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 (k 3), 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 respectively with the negative electrode of described the 7th turn-off device (k7) and the anodic bonding of described the 8th turn-off device (k8).
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| CN 201010249427 CN101924372B (en) | 2010-08-10 | 2010-08-10 | Energy storage control system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| ES2536603B1 (en) * | 2013-10-24 | 2016-03-08 | Aton Energy Solutions, S.L. | Dynamic supercapacitor control system with optimization of loading and unloading. |
| CN109283861A (en) * | 2018-09-18 | 2019-01-29 | 贵州电网有限责任公司 | A kind of compressed-air energy storage automatic control system and its control method |
| CN109861288B (en) * | 2019-03-11 | 2022-10-04 | 三峡大学 | Photovoltaic hybrid energy storage power system based on CPS |
| CN116169770A (en) * | 2023-03-09 | 2023-05-26 | 惠州华智新能源科技有限公司 | Bidirectional UPS photovoltaic system |
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| CN201774266U (en) * | 2010-08-10 | 2011-03-23 | 北京国电富通科技发展有限责任公司 | Energy-storage control system |
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| CN100588075C (en) * | 2006-04-10 | 2010-02-03 | 中国科学院电工研究所 | Hybrid accumulator for elevator and control method thereof |
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