CN218603188U - Energy storage control system - Google Patents
Energy storage control system Download PDFInfo
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- CN218603188U CN218603188U CN202222505656.1U CN202222505656U CN218603188U CN 218603188 U CN218603188 U CN 218603188U CN 202222505656 U CN202222505656 U CN 202222505656U CN 218603188 U CN218603188 U CN 218603188U
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Abstract
The utility model discloses an energy storage control system, which comprises a control power supply; wherein, the control power supply includes first circuit, second circuit and switching unit, and first circuit includes: the filter unit, the rectifying unit, the first anti-backflow module, the support capacitor and the direct current converter are sequentially connected from the input end to the output end; the second line includes: the static switch, the second anti-reflux module, the support capacitor and the direct current converter are sequentially connected from the input end to the output end; one end of the switching unit is connected with the input end of the filtering unit in the first line, and the other end of the switching unit is connected with the input end of the static switch in the second line. The embodiment of the utility model has the advantages of simple structure, effectively reduced the fault rate, improved the reliability of system, and the embodiment of the utility model discloses a beneficial effect by having non-maintaining has reduced the operation expense. The utility model relates to an energy storage control system, but wide application in electrochemistry energy storage technical field.
Description
Technical Field
The utility model belongs to the technical field of the electrochemistry energy storage technique and specifically relates to an energy storage control system.
Background
With the rapid development of the intelligent society, the electricity demand of people increases dramatically, the load of a power grid is large, and as a standby means, an energy storage system shows explosive growth, can maintain normal operation of power supply in the state of failure of alternating current of the power grid, and can provide functional auxiliary services such as peak regulation and frequency modulation, peak clipping and valley filling, load fluctuation stabilization, demand side response and the like, thereby having a vital role.
One main component of the energy storage system is an energy storage control power supply, the current energy storage system control power supply generally adopts a UPS power supply, and a built-in battery of the UPS power supply is generally configured as a lead-acid battery; the UPS power supply needs to be overhauled and replaced in time after being used for 2-3 years, the service life is short, the circuit structure is complex, and the failure rate is high.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides an energy storage control system with long standby time, simple structure and free maintenance.
An embodiment of the utility model provides an energy storage control system, include: controlling a power supply; wherein the control power supply includes a first line, a second line, and a switching unit, the first line including: the filter unit, the rectifying unit, the first anti-backflow module, the support capacitor and the direct current converter are sequentially connected from the input end to the output end; the second line includes: the static switch, the second anti-backflow module, the supporting capacitor and the direct current converter are sequentially connected from the input end to the output end; one end of the switching unit is connected with the input end of the filtering unit in the first line, and the other end of the switching unit is connected with the input end of the static switch in the second line.
Optionally, the switching unit includes: the circuit comprises a first current limiting resistor, a PNP type triode, a voltage regulator tube and a second current limiting resistor; one end of the first current-limiting resistor is connected with the input end of the filtering unit, the other end of the current-limiting resistor is connected with the base electrode of the PNP type triode, the emitting electrode of the PNP type triode is connected with one end of the static switch, the collecting electrode of the PNP type triode is connected with the negative electrode of the voltage-stabilizing tube, the positive electrode of the voltage-stabilizing tube is connected with one end of the second current-limiting resistor, and the second current-limiting resistor is connected with the other end of the static switch.
Optionally, the first backflow prevention module and the second backflow prevention module are composed of anti-reverse diodes.
Optionally, the filtering unit includes: a first inductor and a first capacitor; the first inductor is a common mode inductor, the first capacitor is connected with the first circuit in parallel, and the first inductor is connected with the first capacitor in series.
Optionally, the dc converter comprises: the power device, the diode, the second inductor and the second capacitor are connected in series; one end of the power device is connected with one end of the supporting capacitor, the other end of the power device is connected with one end of the second inductor and one end of the diode, the other end of the second inductor is connected with one end of the second capacitor, and the other end of the diode is connected with the other end of the second capacitor.
Optionally, the rectifying unit is formed by four rectifying diodes connected end to end.
Optionally, the method further comprises: the output end of the energy storage converter is connected with the input end of the battery system and the input end of the control power supply.
Optionally, the battery system comprises: 14 first modules connected in series; the first module is formed by connecting 16 lithium iron phosphate cells in series.
Optionally, the method further comprises: the control power supply comprises an alternating current switch connected with an alternating current input end of the control power supply and a direct current switch connected with a direct current input end of the control power supply.
Above-mentioned the embodiment of the utility model provides an in a technical scheme have following advantage: the embodiment of the utility model discloses an include: controlling a power supply; wherein the control power supply includes a first line, a second line, and a switching unit, the first line including: the filter unit, the rectifying unit, the first anti-backflow module, the support capacitor and the direct current converter are sequentially connected from the input end to the output end; the second line includes: the static switch, the second anti-backflow module, the supporting capacitor and the direct current converter are sequentially connected from the input end to the output end; one end of the switching unit is connected with the input end of the filtering unit in the first line, and the other end of the switching unit is connected with the input end of the static switch in the second line; the embodiment of the utility model has the advantages of simple structure, effectively reduced the fault rate, improved the reliability of system, and the embodiment of the utility model discloses an electronic component such as by AC filter, rectification unit, switching unit, static switch, prevent against current module, DC converter constitutes, has the beneficial effect of being equipped with that the electricity is long, non-maintaining, has saved the energy, has reduced the operation expense.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a circuit diagram of a system according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a filter unit according to an embodiment of the present invention;
fig. 3 is a circuit structure diagram of a rectifying unit according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a dc converter according to an embodiment of the present invention;
fig. 5 is a circuit diagram of a battery system according to an embodiment of the present invention.
Detailed Description
The invention will be further explained and explained with reference to the drawings and the embodiments in the following description.
To there being the problem that the power supply time is short, the structure is complicated, the maintenance cost is high among the energy storage control system of prior art, the embodiment of the utility model provides a power supply time is long, simple structure, non-maintaining energy storage control system, refer to fig. 1, include: a control power supply 5; wherein, the control power supply 5 includes a first line, a second line and a switching unit 10, the first line includes: the filter unit 3, the rectifying unit 4, the first anti-backflow module 81, the support capacitor 7 and the direct current converter 6 are sequentially connected from the input end to the output end; the second circuit includes: the static switch 9, the second anti-backflow module 82, the support capacitor 7 and the direct current converter 6 are connected in sequence from the input end to the output end; one end of the switching unit 10 is connected to the input end of the filtering unit 3 in the first line, and the other end of the switching unit 10 is connected to the input end of the static switch 9 in the second line.
Specifically, as a preferred mode, the static switch 9 of the present invention is a one-way silicon controlled rectifier SCR, and in other embodiments, an element such as an IGBT (Insulated Gate Bipolar Transistor) may be selected as the static switch 9.
Optionally, the switching unit 10 includes: the circuit comprises a first current limiting resistor R1, a PNP type triode Q, a voltage regulator tube TVS and a second current limiting resistor R2; one end of the first current-limiting resistor R1 is connected with the input end of the filtering unit 3, the other end of the first current-limiting resistor R1 is connected with the base electrode of the PNP type triode Q, the emitting electrode of the PNP type triode Q is connected with one end of the static switch 9, the collecting electrode of the PNP type triode Q is connected with the negative electrode of the voltage regulator tube TVS, the positive electrode of the voltage regulator tube TVS is connected with one end of the second current-limiting resistor R2, and the second current-limiting resistor R2 is connected with the other end of the static switch 9.
Alternatively, the first and second backflow prevention modules 81 and 82 are formed of anti-reverse diodes.
Specifically, the first anti-backflow module 81 and the second anti-backflow module 82 may have the same structure (for convenience of description, hereinafter referred to as anti-backflow modules), the anti-backflow modules only allow current to pass through from a single direction, and when a forward voltage bias is generated in the circuit, the mutual cancellation effect of the external electric field and the self-established electric field increases the diffusion current of the carrier, which causes a forward current to be generated, and thus the circuit is turned on; when reverse voltage bias is generated in the circuit, an external electric field and a self-established electric field are further strengthened to form reverse saturation current irrelevant to the reverse bias voltage value in a certain reverse voltage range, so that the current passes through from a single direction.
Optionally, the filtering unit 3 comprises: a first inductor L1 and a first capacitor C1; the first inductor L1 is a common mode inductor, the first capacitor C1 is connected in parallel with the first line, and the first inductor L1 is connected in series with the first capacitor C1.
Specifically, referring to fig. 2, the filtering unit 3 is composed of a first inductor L1 and a first capacitor C1, the first inductor L1 is a common mode inductor, the first capacitor C1 is connected in parallel to the first line, the first inductor L1 is connected in series to the first capacitor C1, when common mode interference occurs, the magnetic flux directions of two coils in the common mode inductor are the same, and after coupling, the total inductance of the filtering unit 3 is rapidly increased, so that a large inductive reactance is generated to a common mode signal, and the purpose of filtering is achieved.
Optionally, the dc converter 6 includes: the power device M, the diode D, the second inductor L2 and the second capacitor C2. One end of the power device M is connected to one end of the supporting capacitor 7, the other end of the power device M is connected to one end of the second inductor L2 and one end of the diode D, the other end of the second inductor L2 is connected to one end of the second capacitor C2, and the other end of the diode D is connected to the other end of the second capacitor C2.
Specifically, the power device M of the dc converter 6 may be a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) or an IGBT. Referring to fig. 4, one end of the power device M is connected to one end of the supporting capacitor 7, the other end of the power device M is connected to one end of the second inductor L2 and one end of the diode D, the other end of the second inductor L2 is connected to one end of the second capacitor C2 and serves as an anode of the 24VDC constant voltage direct current, and the other end of the diode D is connected to the other end of the second capacitor C2 and serves as a cathode of the 24VDC constant voltage direct current.
In the embodiment of the present invention, a voltage dropping circuit (BUCK) is adopted, when the power device M is closed, the diode D bears the negative voltage pipe section, the current charges the second inductor L2 and the second capacitor C2, the current flows in the forward direction, and the electric energy is stored in the second inductor L2 and the second capacitor C2; because of the self-inductance of the second inductor L2, the output cannot reach the voltage value of the input power supply immediately, when the power device M is disconnected, the diode D plays a role of freewheeling, the second inductor L2 starts to discharge, and the current in the circuit is kept unchanged because of the self-inductance of the second inductor L2; when the current is gradually reduced, the current returns to the other end of the second inductor L2 through the load and the diode D to form a loop for short-time power supply, through the operation, the direct current converter 6 can convert the direct current of 254-780 VDC into stable and reliable 24VDC constant-voltage direct current, and the direct current converter 6 formed by the components has the protection functions of over-temperature protection, over-current protection, over-voltage protection, under-voltage protection and the like; where VDC represents direct current.
Optionally, the rectifying unit 4 is formed by four rectifying diodes connected end to end.
Specifically, referring to fig. 3, the rectifying unit 4 is formed by connecting four rectifying diodes VD1 to VD4 end to form a bridge, and the bridge rectifying unit 4 has the beneficial effects of high output voltage and small ripple voltage by using the rectifying diodes VD1 to VD4 with the characteristic of unidirectional conduction; meanwhile, current passes through the inside of the positive half cycle and the negative half cycle of the alternating current input in the rectifying process, so that the working efficiency of the rectifying unit 4 is higher.
Optionally, the method further comprises: the energy storage device comprises an energy storage converter 1 and a battery system 2, wherein the output end of the energy storage converter 1 is connected with the input end of the battery system 2 and the input end of a control power supply 5.
Specifically, the energy storage converter 1 can control the charging and discharging process of the battery system 2, so that alternating current and direct current can be converted in a bidirectional manner, and alternating current can be converted into direct current for charging the battery system 2; the dc power of the battery system 2 may be converted into ac power for supplying power to a grid or a load.
Alternatively, the battery system 2 includes: 14 first modules connected in series; wherein, first module is established ties by 16 lithium iron phosphate batteries and is constituteed.
Specifically, referring to fig. 5, the battery system 2 is composed of 14 first modules connected in series, each of the first modules is composed of 16 lithium iron phosphate cells connected in series, wherein, optionally, the capacity of each lithium iron phosphate cell may be 280Ah. The rated voltage of the battery system 2 can be 716.8VDC, and the battery system can store electric energy, be charged or discharged through the control strategy of the energy storage converter 1 and provide electric energy for a power grid or a load.
Optionally, the method further comprises: the alternating current switch QF1 is connected with the alternating current input end of the control power supply 5, and the direct current switch QF2 is connected with the direct current input end of the control power supply 5.
The working principle of the embodiment of the present invention is described below with reference to the drawings of the specification:
with AC switch QF1, DC switch QF2 closing, the utility model discloses an energy storage control system of embodiment gets into operating condition.
When the power supply at the alternating current side (power grid) is normal, the control power supply 5 can input one-phase or two-phase 180-550 VAC wide-range alternating current, the alternating current acts on the base electrode of the PNP type triode Q through the first current-limiting resistor R1 to control the PNP type triode Q to be cut off, the current flowing through the second current-limiting resistor R2 is 0, so that the SCR enters a cut-off state, the control power supply 5 of the energy storage control system does not consume the electric energy of the battery system 2, and at the moment, the control power supply 5 of the energy storage control system is powered by the power supply at the alternating current side (power grid); where VAC represents alternating current.
When an alternating current side (power grid) power supply is disconnected or off-grid debugging is carried out, the current passing through the first current limiting resistor R1 is 0, the PNP type triode Q is conducted, the voltage of a direct current side (battery system 2) power supply acts on the voltage stabilizing tube through the emitting electrode of the PNP type triode to conduct the voltage stabilizing tube, the direct current passes through the second current limiting resistor R2 to act on the control electrode of the silicon controlled rectifier SCR to enable the silicon controlled rectifier SCR to enter a conducting state, at the moment, the control power supply 5 of the energy storage control system is powered by the direct current side (battery system 2) power supply, meanwhile, the energy storage control system can be ensured to be in a working state for a long time, and the function of long-time power supply is achieved.
When the power supply of the direct current side (the battery system 2) is powered, the power supply of the alternating current side is recovered, the state when the power supply of the alternating current side (the power grid) is normal is entered, and at the moment, the power supply of the direct current side (the battery system 2) is not powered any more because a path is not formed due to the cut-off of the Silicon Controlled Rectifier (SCR).
The embodiment of the utility model provides a concatenate a support electric capacity 7 at the input of the direct current converter 6 of control power supply 5 for supply power to the load by electric capacity in the switching process of alternating current side (electric wire netting) power and direct current side (battery system 2) power supply, can guarantee not influenced by the voltage in the direct current fluctuation range in the switching process of power supply, be favorable to realizing the non-delay switching of power supply; it should be noted that the support capacitor 7 may be a filter capacitor. In addition, after passing through the filtering unit, the alternating-current side (power grid) power supply is converted into pulsating direct current through the rectifying unit 4, and the supporting capacitor 7 also has the function of filtering the pulsating direct current. The direct current converter 6 can convert the direct current of 254-780 VDC into stable and reliable 24VDC constant-voltage direct current for output, and is beneficial to load power utilization.
The embodiment of the utility model provides a concatenate first anti-reflux module 81 at the input of the support electric capacity 7 of the first circuit of control power 5, concatenate second anti-reflux module 82 at the input of second circuit and support electric capacity 7, first anti-reflux module 81 and second anti-reflux module 82 constitute by the P-N knot that P type semiconductor and N type semiconductor formed; it should be noted that, referring to fig. 1, the supporting capacitor 7 mentioned for the first line and the second line is the same. When forward voltage bias is generated in the circuit, the mutual inhibition and elimination action of an external electric field and a self-established electric field increases the diffusion current of a current carrier to cause forward current, so that the P-N junction is conductive; when reverse voltage bias is generated in the circuit, an external electric field and a self-established electric field are further strengthened to form reverse saturation current irrelevant to the reverse bias voltage value in a certain reverse voltage range, so that the current cannot be retrograde. The situation that the voltage of the supporting capacitor 7 is higher than the rectified voltage of the alternating current side (power grid) or the direct current side (battery system 2) and backflow occurs in the switching process of the power supply is effectively prevented.
A voltage stabilizing tube TVS is arranged between the PNP type triode of the switching unit 10 and the second current limiting resistor R2, and when the voltage of the battery system 2 is higher than the set threshold value, the voltage stabilizing tube TVS is reversely conducted, and the second current limiting resistor R2 acts on the control electrode of the silicon controlled rectifier SCR to conduct the silicon controlled rectifier SCR and control the battery system 2 to discharge, and when the voltage of the battery system 2 is lower than the set threshold value, the current flowing through the second current limiting resistor R2 is 0, so that the silicon controlled rectifier SCR is cut off, and the battery system 2 stops discharging, thereby having the functions of preventing the battery system 2 from over-discharging and protecting the battery system 2.
When the power supply on the alternating current side (power grid) is disconnected or off-grid debugging is carried out, the voltage of the battery system 2 is too low, the voltage stabilizing tube TVS is cut off, the current flowing through the second current limiting resistor R2 is 0, the silicon controlled rectifier SCR is cut off, and the energy storage system is in a complete power-off state. If the AC side (electric wire netting) power resumes normally, the embodiment of the utility model provides a can the automatic start under energy storage converter 1, battery system 2, control power supply 5's control strategy, enter into the state that AC side (electric wire netting) power is normal, the system normally operates, realize "black start" function, reduce the loss that the power failure brought.
The embodiment of the utility model has the following beneficial effect:
1. the embodiment of the utility model is realized by the conduction or the cut-off of the PNP type triode and the controllable silicon, the switching response time is less than 20 mus, and the capacitor is adopted to supply power in the switching process, thus the embodiment has the characteristics of high response speed and no time delay switching;
2. the circuit structure is simplified, and fewer components are used, so that the energy storage control system of the embodiment of the utility model has the beneficial effects of light weight, small volume and low cost, and simultaneously, the failure rate is reduced;
3. the service life is long, maintenance can be avoided, and the cost required by operation is reduced;
4. the power supply time is long, and energy can be saved;
5. the embodiment of the utility model provides a can realize the function of "black start", reduce the loss that the power failure brought.
The following is an application scenario provided by the embodiment of the present invention:
setting a control power supply, wherein the control power supply comprises a first circuit, a second circuit and a switching unit, and the first circuit comprises: the filter unit, the rectifying unit, the first anti-backflow module, the support capacitor and the direct current converter are sequentially connected from the input end to the output end; the second circuit includes: the static switch, the second anti-backflow module, the supporting capacitor and the direct current converter are connected in sequence from the input end to the output end; one end of the switching unit is connected with the input end of the filtering unit in the first line, and the other end of the switching unit is connected with the input end of the static switch in the second line.
Close AC switch QF1, QF2, make the utility model discloses an energy storage control system of embodiment gets into operating condition.
When the alternating current side power supply is normal, the Silicon Controlled Rectifier (SCR) of the static switch is cut off, and the alternating current side power supply supplies power to a load through filtering, rectification and direct current conversion; when the alternating current is disconnected or off-grid debugging is carried out, the Silicon Controlled Rectifier (SCR) of the static switch is switched on, and the direct current side power supply supplies power through the direct current to change the direction of the load.
While the preferred embodiments of the present invention have been described in detail, it is to be understood that the invention is not limited thereto, and that various equivalent modifications and substitutions may be made by those skilled in the art without departing from the spirit of the present invention, and that such equivalent modifications and substitutions are to be included within the scope of the present invention as defined in the appended claims.
Claims (9)
1. An energy storage control system, comprising:
a control power supply, wherein the control power supply comprises a first line, a second line and a switching unit;
the first line includes: the filter unit, the rectifying unit, the first anti-backflow module, the support capacitor and the direct current converter are sequentially connected from the input end to the output end;
the second line includes: the static switch, the second anti-backflow module, the supporting capacitor and the direct current converter are sequentially connected from the input end to the output end;
one end of the switching unit is connected with the input end of the filtering unit in the first line, and the other end of the switching unit is connected with the input end of the static switch in the second line.
2. The energy storage control system according to claim 1, wherein the switching unit includes:
the circuit comprises a first current limiting resistor, a PNP type triode, a voltage regulator tube and a second current limiting resistor;
one end of the first current-limiting resistor is connected with the input end of the filtering unit, the other end of the current-limiting resistor is connected with the base electrode of the PNP type triode, the emitting electrode of the PNP type triode is connected with one end of the static switch, the collecting electrode of the PNP type triode is connected with the negative electrode of the voltage-stabilizing tube, the positive electrode of the voltage-stabilizing tube is connected with one end of the second current-limiting resistor, and the second current-limiting resistor is connected with the other end of the static switch.
3. The energy storage control system of claim 1, wherein the first and second anti-backflow modules are formed of anti-backflow diodes.
4. The energy storage control system according to claim 1, wherein the filter unit comprises:
a first inductor and a first capacitor;
the first inductor is a common mode inductor, the first capacitor is connected with the first circuit in parallel, and the first inductor is connected with the first capacitor in series.
5. An energy storage control system according to claim 1, wherein said dc converter comprises:
the power device, the diode, the second inductor and the second capacitor;
one end of the power device is connected with one end of the supporting capacitor, the other end of the power device is connected with one end of the second inductor and one end of the diode, the other end of the second inductor is connected with one end of the second capacitor, and the other end of the diode is connected with the other end of the second capacitor.
6. The energy storage control system according to claim 1, wherein the rectifying unit is formed by four rectifying diodes connected end to end.
7. The energy storage control system of claim 1, further comprising:
the output end of the energy storage converter is connected with the input end of the battery system and the input end of the control power supply.
8. The energy storage control system according to claim 7, wherein the battery system comprises:
14 first modules connected in series; the first module is formed by connecting 16 lithium iron phosphate cells in series.
9. The energy storage control system of claim 1, further comprising:
the control power supply comprises an alternating current switch connected with an alternating current input end of the control power supply and a direct current switch connected with a direct current input end of the control power supply.
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| CN202222505656.1U CN218603188U (en) | 2022-09-21 | 2022-09-21 | Energy storage control system |
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| CN202222505656.1U CN218603188U (en) | 2022-09-21 | 2022-09-21 | Energy storage control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117154139A (en) * | 2023-10-27 | 2023-12-01 | 福建星云电子股份有限公司 | Flow battery activation device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117154139A (en) * | 2023-10-27 | 2023-12-01 | 福建星云电子股份有限公司 | Flow battery activation device and method |
| CN117154139B (en) * | 2023-10-27 | 2024-02-06 | 福建星云电子股份有限公司 | Flow battery activation device and method |
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