CN208638048U - A kind of the automatic energy saving on-line maintenance equipment and system of electricity substation battery - Google Patents
A kind of the automatic energy saving on-line maintenance equipment and system of electricity substation battery Download PDFInfo
- Publication number
- CN208638048U CN208638048U CN201821041593.6U CN201821041593U CN208638048U CN 208638048 U CN208638048 U CN 208638048U CN 201821041593 U CN201821041593 U CN 201821041593U CN 208638048 U CN208638048 U CN 208638048U
- Authority
- CN
- China
- Prior art keywords
- circuit
- pwm
- storage battery
- circuit unit
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000012423 maintenance Methods 0.000 title claims abstract description 46
- 230000005611 electricity Effects 0.000 title claims abstract description 8
- 238000004891 communication Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 26
- 238000007600 charging Methods 0.000 claims description 55
- 238000007599 discharging Methods 0.000 claims description 33
- 238000002955 isolation Methods 0.000 claims description 19
- 239000000178 monomer Substances 0.000 claims description 19
- 238000012544 monitoring process Methods 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 9
- 230000003247 decreasing effect Effects 0.000 claims description 8
- 238000013500 data storage Methods 0.000 claims description 7
- 230000003993 interaction Effects 0.000 claims description 7
- 210000004899 c-terminal region Anatomy 0.000 abstract description 2
- 238000007726 management method Methods 0.000 description 7
- 210000004027 cell Anatomy 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003079 width control Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides the automatic energy saving on-line maintenance equipment and system of a kind of electricity substation battery, including MCU circuit unit, drive control circuit, and full charge and discharge and control circuit unit online, the complete online charge and discharge and control circuit unit include tri- terminals of control signal and A, B, C, and heavy-duty diode D1, the cathode of heavy-duty diode D1 connects the end A, anode connects the end B, and the anode of the end A connection communication power supply, the end B connects the anode of battery group, and C-terminal connects the cathode of battery group；Its control signal connects on the output end of driving circuit, and the input terminal of drive control circuit is connect with MCU circuit unit；Its output end is connect with the control signal of complete online charge and discharge and control circuit unit.It efficiently solves offline discharge operation, power supply and restores online overall process maintenance test security hidden trouble, have many advantages, such as that energy saving, easy to operate, online power supply safety, test terminate to be charged and restored equipotential link online automatically.
Description
Technical Field
The utility model relates to a power maintenance equipment in the power substation, in particular to automatic energy-conserving online maintenance equipment and system of power substation battery.
Background
The existing 48V communication power supply backup storage battery pack for the power substation in the power industry has the problems of high labor intensity, high cost, high risk, heavy maintenance task and energy waste due to the fact that the number, the distribution and the scale of the transformer substations are large, so that most of battery capacity discharge test maintenance work cannot be carried out in place, the actual capacity of the backup storage battery pack for the transformer substations cannot be known, the emergency guarantee power supply time is unclear, emergency power generation scheduling management cannot be effectively carried out due to mains supply interruption, communication interruption accidents of the transformer substations often occur, storage batteries are scrapped in advance, and the problems always bother communication power supply maintenance management workers and specific maintenance workers in the whole power industry.
In order to realize the full online unattended intelligent monitoring management of the 48V communication power supply backup storage battery pack of the power transformer substation, the capacity test of online storage battery charging and discharging is automatically completed by remote monitoring, the capacities of all online storage battery packs of the current network are mastered in time, the data of the power supply duration are ensured, the labor intensity of maintenance personnel is reduced, the maintenance cost is reduced, the operation quality of the communication power supply of the transformer substation and the overall maintenance work efficiency are improved, the comprehensive maintenance management level of the safe operation of the transformer substation is improved, the scientific and effective maintenance management technology is adopted, the service life of the storage battery pack is prolonged, and the automatic detection of the charging and discharging capacity of the full-network online storage battery pack.
The traditional storage battery pack adopts an off-line dummy load discharging method, the electric quantity of the battery is completely consumed on the dummy load, the electric quantity is completely converted into heat to be dissipated, and the environment temperature is provided. The base station is generally equipped with an air conditioner to maintain the constant temperature of the machine room, so that the consumed electric power of the air conditioner is used for cooling.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in providing an automatic energy-conserving online maintenance equipment and system of electric power substation battery, uses intelligent dummy load to carry out the off-line test contrast with the tradition, has solved off-line discharge operation, power supply effectively and has resumeed online overall process maintenance test potential safety hazard problem, has energy-conservation, easy and simple to handle safety, online power supply safety, test end and carries out online charging and resume advantages such as equipotential connection automatically.
The utility model discloses automatic energy-conserving online maintenance equipment is realized like this: an automatic energy-saving online maintenance device for a storage battery of an electric power substation comprises an electricity load, a communication power supply and a storage battery pack, wherein the communication power supply and the storage battery pack supply power for the electricity load, the automatic energy-saving online maintenance device comprises an MCU circuit unit, a drive control circuit and a full online charging and discharging and control circuit unit, the full online charging and discharging and control circuit unit comprises a control input end, A, B, C three wiring terminals and a high-power diode D1, the negative electrode of the high-power diode D1 is connected with an end A, the positive electrode of the high-power diode D1 is connected with an end B, the end A is connected with the positive electrode of the communication power supply, the end B is connected with the positive electrode of the storage battery pack; the control input end of the MCU driving circuit is connected with the output end of the driving circuit, and the input end of the driving control circuit is connected with the MCU circuit unit; the output end of the charge-discharge control circuit unit is connected with the control input end of the full-online charge-discharge and control circuit unit;
when the storage battery pack is in on-line boosting discharge, the MCU circuit unit controls the all-on-line charging and discharging and control circuit unit to work in a boosting mode through the drive control circuit, so that when the storage battery pack boosts and exceeds the terminal voltage of the communication power supply, the storage battery pack discharges electricity for a load;
when the storage battery pack is in on-line current-limiting charging: the MCU circuit unit controls the all-online charging and discharging and control circuit unit to work in a voltage reduction mode through the drive control circuit, so that the communication power supply carries out current-limiting charging on the storage battery until the current-limiting charging current gradually drops to a set threshold value, and then the storage battery is restored to an equipotential online connection state.
Further, the all-online charging and discharging and control circuit unit further comprises a first switch K1, a second switch K2, a PWM pulse circuit Q1, a diode D3, a PWM pulse circuit Q2, a diode D4, an inductor L1 and a shunt F1; the high-power diode D1 and the first switch K1 are connected in parallel, then the negative electrode is connected to the end A, the positive electrode is connected to the end B, the diode D3 and the PWM pulse circuit Q1 are connected in parallel, then the negative electrode is connected to the end A, and the positive electrode is connected to the IOB end of the shunt F1 through the inductor L1; the diode D4 is connected with the PWM pulse circuit Q2 in parallel, the positive electrode of the diode is connected with the C end through a second switch K2, the negative electrode of the diode is connected with the IOB end of a shunt F1 through an inductor L1, and the IOA end of the shunt F1 is connected with the B end;
when the MCU circuit unit controls the first switch K1 to be switched off through the drive control circuit and the second switch K2 to be switched on, the all-online charge-discharge and control circuit unit works in a boosting mode, and the MCU circuit unit dynamically adjusts the drive pulse width of the PWM pulse circuit Q2 in real time through the drive control circuit according to the battery discharge test current at the B end, so that the boosting of the storage battery pack is realized;
the MCU circuit unit keeps the first switch K1 disconnected through the drive control circuit, the second switch K2 is closed, the pulse of the PWM pulse circuit Q2 is closed, the pulse of the PWM pulse circuit Q1 is started and real-time pulse width adjustment is carried out, the all-online charge-discharge and control circuit unit works in a voltage reduction mode, the communication power supply carries out current-limiting charging on the storage battery pack until the current-limiting charging current gradually drops to a set threshold value, the MCU circuit unit controls the first switch K1 to be closed through the drive control circuit, the pulse of the PWM pulse circuit Q1 is closed, and finally the second switch K2 is disconnected, so that the storage battery pack is restored to the equipotential connection state with the communication power supply.
Further, the real-time dynamic adjustment of the driving pulse width of the PWM pulse circuit Q2 is: when the system needs to increase the output voltage and the output current, the pulse width of the PWM pulse circuit Q2 is increased; otherwise, it is decreased; in the actual constant current control process, when the difference between the actual discharge current value and the set discharge current value is smaller than a certain threshold value, the adjustment is stopped;
the real-time pulse width adjustment of the PWM pulse circuit Q1 is as follows: when the system needs to increase the charging current, the pulse width of the PWM pulse circuit Q1 is increased, otherwise, the pulse width is decreased; and in the actual constant current control process, when the difference between the actual charging current value and the set charging current value is smaller than a certain threshold value, the adjustment is stopped.
Further, the driving control circuit comprises a PWM control chip, a first isolation differential circuit, a second isolation differential circuit, a switch K3, a first PWM-to-dc signal circuit, a second PWM-to-dc signal circuit, and a switch K4; the power supply circuit also comprises three input ends of voltage feedback loops, namely a VA end, a VB end and a VC end, two input ends of current feedback loops, namely an IA end and an IB end, a working reference input end of a voltage loop, namely a PA end, and a working reference input end of a current loop, namely a PB end, and also comprises a first PWM output end and a second PWM output end;
the PWM control chip is respectively connected with the VA end and the VB end through a first isolation differential circuit and a change-over switch K3 in sequence, and is also connected with the VC end through the first isolation differential circuit; the VA end, the VB end and the VC end are respectively connected with the A end, the B end and the C end;
the PWM control chip is respectively connected with an IA end and an IB end through a second isolation differential circuit; the IA end and the IB end are respectively connected with the IOA end and the IOB end of the shunt F1;
the PWM control chip is connected with the PA end through a first PWM-to-DC signal circuit and is connected with the PB end through a second PWM-to-DC signal circuit; the PA end and the PB end are directly connected to two PWM output ports of the MCU circuit unit;
the PWM control chip is connected to a first PWM output terminal and a second PWM output terminal through the switch K4, the first PWM output terminal is connected to the G terminal of the PWM pulse circuit Q1, and the second PWM output terminal 7 is connected to the G terminal of the PWM pulse circuit Q2.
Further, the high power diode D1 is formed by connecting one or two high power diodes in parallel.
Further, the utility model discloses still include monomer collection unit, monomer collection unit includes that a plurality of monomer modules and a monomer collect the module, and is a plurality of the monomer module all connects the monomer collects the module, and is a plurality of monomer module one-to-one storage battery's the positive negative pole of battery cell.
Further, the utility model discloses still include terminal voltage acquisition circuit and current acquisition circuit, terminal voltage acquisition circuit connects in parallel at storage battery's both ends, current acquisition circuit concatenates in storage battery's one end, just terminal voltage acquisition circuit with current acquisition circuit all with MCU circuit unit connects.
Further, the utility model discloses still include data storage and human-computer interaction circuit, data storage and human-computer interaction circuit with MCU circuit unit connects.
Further, the utility model discloses still include the working power supply circuit, the working power supply circuit with MCU circuit unit connects.
Further, the utility model discloses still include backstage RS485 and expander circuit, backstage RS485 and expander circuit with MCU circuit unit connects.
The utility model discloses automatic energy-conserving online maintenance system is realized like this: the utility model provides an automatic energy-conserving online maintenance system of electric power substation battery, include automatic energy-conserving online maintenance equipment still includes backstage control network management center, and this backstage control network management center passes through the ethernet and connects MCU circuit unit.
The utility model has the advantages of as follows:
(1) the utility model discloses use the voltage at online communication power and reserve storage battery both ends as this test equipment's input working power supply, satisfy battery discharge characteristic, relevant communication power operation maintenance regulation standard and storage battery and maintain the test requirement, discharge and detect full online and maintained discharge safety energy-conservation.
(2) The utility model discloses a high-power diode's seamless connection technique concatenates with the group battery of being tested, guarantees that the storage battery that is surveyed is in safe on-line state all the time, does not influence the normal safe power supply to communication system equipment, realizes that the storage battery that is surveyed discharges to actual load with the discharge parameter online that test equipment set for.
(3) The utility model discloses have the safe energy-conserving discharge function of battery group to communication equipment load, be applicable to various communication equipment load power supply backup storage battery that present net is different and carry out online constant current test of discharging
(4) The utility model discloses after accomplishing the discharge capacity test, carry out online current-limiting by online rectifier output working power supply and charge through test equipment automatic control to accomplish equipotential safety connection.
(5) The utility model discloses a monomer collection unit to the detection is maintained to wired voltage test management mode, and is easy and simple to handle, improves system maintenance work safety.
(6) The utility model discloses the output has steady voltage current-limiting, stationary flow voltage limiting control protect function to and output overcurrent, overvoltage protection and overvoltage shutdown protect function, possess communication backup battery pack online discharge capacity and detect and safe power supply protection characteristics.
(7) The utility model discloses still possess and jointly gather battery monomer voltage, internal resistance and negative pole post temperature data's ability with a distributing type one drags a monomer module. And uploading the data to a background network management monitoring center in real time. Meanwhile, the storage battery pack is stored in a local memory in real time in the process of charging and discharging test of the system on the storage battery pack.
(8) The utility model discloses an use storage battery safe high-efficient technique of stepping up, let storage battery replace switching power supply wholly or partly to supply power to the actual power consumption load in scene, its process does not produce obvious heat, directly supplies with the power consumption load with the electric quantity of group battery, has saved power consumption, has also saved the power consumption of air conditioner simultaneously, compares with the discharge test mode of traditional dummy load power consumption, has saved 2 times of energy to reach energy saving and emission reduction's purpose. Calculated with a set of 48V500AH batteries: the online energy-saving discharge test method using the system can save about 48 × 500 × 2 — 48000WH and about 24 degrees of industrial electricity. If 10000 stations exist, the industrial electricity consumption of 480000 degrees can be saved by discharging once, and the emission can be reduced by converting into carbon emission: 78.5 × 4800 ═ 376.8 tons.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic structural block diagram of the automatic energy-saving online maintenance device of the present invention.
Fig. 2 is the utility model discloses the functional structure block diagram of full online charge-discharge and control circuit unit in the automatic energy-conserving online maintenance equipment.
Fig. 3 is a schematic structure block diagram of the driving control circuit in the automatic energy-saving online maintenance device of the present invention.
Fig. 4 is a schematic structural block diagram of the automatic energy-saving online maintenance device of the present invention.
Detailed Description
Referring to fig. 1, the power substation related to the automatic energy-saving online maintenance device 100 of the present invention includes a storage battery pack 200, a communication power supply 300, and an electrical load 400, wherein the communication power supply 300 and the storage battery pack 200 supply power to the electrical load 400, which is suitable for various communication device loads in the existing network, and the communication power supply 300 in fig. 1 uses 48V as an example, but the present invention is not limited thereto.
The utility model discloses an automatic energy-conserving online maintenance equipment 100 includes MCU circuit unit 1, drive control circuit 2 to and full online charge-discharge and control circuit unit 3, full online charge-discharge and control circuit unit 3 includes control input end O and A, B, C three wiring end, and high-power diode D1, and this high-power diode D1's negative pole connects the A end, and the positive pole connects the B end, and the A end connects the positive pole of communication power supply, and the B end connects the positive pole of storage battery 200, and the C end connects the negative pole of storage battery 200; the control input end O of the driving circuit is connected with the output end of a driving circuit 2, and the input end of the driving control circuit 2 is connected with the MCU circuit unit 1; the output end of the control circuit unit is connected with the control input end O of the all-online charging and discharging and control circuit unit 3. Thus, when the storage battery pack 200 is in an online test working state, the high-power diode D1 is connected between the storage battery pack 200 and a direct-current distribution board of system equipment of the communication power supply 300, so that the tested storage battery pack 200 is ensured to be always in a safe online state, the purposes of energy conservation and emission reduction are achieved, and normal and safe power supply to an electric load is not influenced.
The online boosting discharge process of the battery pack 200 is as follows: under the control of the MCU circuit unit 1, the driving control circuit 2 controls the all-on-line charging/discharging and controlling circuit unit 3 to operate in a boost mode, so as to boost the voltage of the battery pack 200, and when the boosted voltage exceeds the terminal voltage of the communication power supply 300, the battery pack 200 discharges the power load 400;
the on-line current-limiting charging process of the battery pack 200 is as follows: when the on-line boosting discharge is finished, the terminal voltage of the storage battery pack 200 is lower than the voltage of the communication power supply 300, under the control of the MCU circuit unit 1, the drive control circuit 2 controls the all-on-line charge and discharge and control circuit unit 3 to operate in a step-down mode, so that the communication power supply 300 performs current-limiting charging on the storage battery pack 200, when the terminal voltage of the storage battery pack 200 approaches the terminal voltage of the communication power supply 300, the current-limiting charging current gradually decreases to a set threshold, and the all-on-line charge and discharge and control circuit unit 3 makes the storage battery pack 200 recover to an equipotential on-line connection state.
Wherein,
the MCU circuit unit 1 is actually an MCU and a matched circuit thereof, and takes a system program instruction of the MCU as a control mode to control all peripheral circuits or modules connected with and related to the MCU;
the high-power diode D1 of the all-online charging and discharging and control circuit unit 3 is formed by connecting one or two high-power diodes in parallel. Referring to fig. 2, the all online charging/discharging and control circuit unit 3 further includes a first switch K1, a second switch K2, a PWM pulse circuit Q1, a diode D3, a PWM pulse circuit Q2, a diode D4, an inductor L1, and a shunt F1; the high-power diode D1 and the first switch K1 are connected in parallel, then the negative electrode is connected to the end A, the positive electrode is connected to the end B, the diode D3 and the PWM pulse circuit Q1 are connected in parallel, then the negative electrode is connected to the end A, and the positive electrode is connected to the IOB end of the shunt F1 through the inductor L1; the diode D4 is connected in parallel with the PWM pulse circuit Q2, the positive electrode of the diode is connected with the end C through a second switch K2, the negative electrode of the diode is connected with the IOB end of the shunt F1 through an inductor L1, and the IOA end of the shunt F1 is connected with the end B.
The first switch K1 is a normally closed contactor, the second switch K2 is a normally open contactor, and under the default condition, the first switch K1 is closed, the second switch K2 is opened, and the storage battery pack 200 is in an equipotential connection state with the communication power supply 300. When the first switch K1 is opened and the second switch K2 is closed, the storage battery pack 200 enters an online test loop state, and when the storage battery pack 200 is tested and the current-limiting charging is finished, the first switch K1 is closed, the second switch K2 is opened, and the storage battery pack 200 is restored to a default equipotential online connection state. In addition, the PWM pulse circuit Q1 and the PWM pulse circuit Q2 are rectangular pulse circuits, and the pulse widths thereof can be adjusted by the drive control circuit 2; the diode D3 is used in conjunction with the PWM pulse circuit Q1, and the diode D4 is used in conjunction with the PWM pulse circuit Q2 to absorb the follow current, and the inductor L1 is used to prevent the PWM pulse circuit Q1 and the PWM pulse circuit Q2 from short-circuiting and to complete the conversion of power or energy of the whole circuit.
As shown in fig. 2, the online boosting and discharging process of the storage battery pack specifically includes: under the control of the MCU circuit unit 1, the drive control circuit 2 controls the first switch K1 to be turned off, the second switch K2 to be turned on, the battery pack 200 enters an online test loop state, the drive control circuit 2 controls the PWM pulse circuit Q2 in the all online charge-discharge and control circuit unit 3 to BOOST voltage, and simultaneously keeps the PWM pulse of the PWM pulse circuit Q1 in a turned-off state, at this time, the all online charge-discharge and control circuit unit 3 works in a BOOST voltage mode, the MCU circuit unit 1 dynamically adjusts the drive pulse width of the PWM pulse circuit Q2 in real time through the drive control circuit 2 according to the battery discharge test current at the B terminal, thereby realizing the voltage BOOST of the battery pack 200; the real-time dynamic regulation rule of the driving pulse width of the PWM pulse circuit Q2 is as follows: when the system needs to increase the output voltage and the output current, the pulse width of the PWM pulse circuit Q2 is increased; otherwise, it is decreased; and in the actual constant current control process, when the difference between the actual discharge current value and the set discharge current value is smaller than a certain threshold value, stopping adjustment, otherwise, continuing adjustment. Wherein the threshold value is also called anti-oscillation buffer zone, and is generally between 0.5 and 0.8A. When the boosted voltage slightly exceeds (the small amplitude exceeds the voltage of the communication power supply 300, which is the voltage of the boost upper limit reduced by the terminal voltage of the battery pack, and the boost upper limit is continuously adjustable between 54 and 56.4V), the battery pack 200 can discharge the electric load 400. The magnitude of the discharge current depends on the magnitude of the pre-discharge current set by the electric load 400 and the MCU circuit unit 1. With the progress of the discharging process, the terminal voltage of the storage battery pack 200 continuously decreases, the driving control circuit 2 has the capability of monitoring a hardware current loop and a voltage loop, and can dynamically adjust the PWM pulse width parameter of the driving PWM pulse circuit Q2 in real time, so that the whole boosting discharging process is safe and controllable, and the whole deep online energy-saving discharging process is finally completed. The depth is that the discharge current with the nominal capacity of 0.1C of the storage battery pack 200 is discharged until the lower limit of the discharge group end voltage of the storage battery pack or the lower limit of the single battery voltage, and taking a 48V storage battery pack consisting of 2V single batteries as an example, the lower limit of the discharge group end of the storage battery pack is 43.5V, and the lower limit of the single battery voltage is 1.8V; for the driving circuit 2, the MCU circuit unit 1 is a reference for a DA (digital signal to analog signal), which includes a voltage reference and a current limit reference.
After the on-line boosting and discharging process of the storage battery pack 200 is finished, the terminal voltage of the storage battery pack 200 is much lower than that of the communication power supply 300, and the storage battery pack 200 needs to be charged through the current-limiting charging circuit of the all-on-line charging and discharging and control circuit unit 3, so that large current impact caused by directly connecting the storage battery pack 200 with a power shortage in parallel to the communication power supply 300 is avoided.
As shown in fig. 2, the online current-limiting charging process of the storage battery pack specifically includes: under the control of the MCU circuit unit 1, the driving control circuit 2 controls the first switch K1 to be opened, the second switch K2 to be closed, and closes the pulse of the PWM pulse circuit Q2, starts the pulse of the PWM pulse circuit Q1 and performs real-time pulse width adjustment, so that the all-online charging/discharging and control circuit unit 3 operates in a step-down mode, so that the communication power supply 300 performs current-limited charging on the battery pack 200, and when the terminal voltage of the battery pack 200 approaches the terminal voltage of the communication power supply 300, the current-limited charging current will gradually decrease until the terminal voltage drops to a set threshold (the threshold is generally 2% of the programming capacity of the battery pack, for example, the battery with 500AH is generally set to 10A), the MCU circuit unit 1 controls the first switch K1 to be closed by the driving control circuit 2, and then closes the PWM pulse width control of the PWM pulse circuit Q1 and the PWM pulse circuit Q2, and finally, the second switch K2 is disconnected, and the storage battery pack 200 is restored to be in an equipotential connection state with the communication power supply 300, so that a complete energy-saving charge and discharge test process is completed, the whole process is controlled by the MCU circuit unit 1, and the purpose of automatically maintaining and testing the storage battery pack under the unattended condition is achieved. The real-time pulse width adjustment of the PWM pulse circuit Q1 is: when the system needs to increase the charging current, the pulse width of the PWM pulse circuit Q1 is increased, otherwise, the pulse width is decreased; and in the actual constant current control process, stopping adjustment when the difference between the actual charging current value and the set charging current value is smaller than a certain threshold value, otherwise, continuing adjustment. This threshold, also known as the anti-rattle buffer, is typically between 0.5 and 0.8A.
The driving control circuit 2 is an important circuit unit for driving and controlling all-online charging and discharging and testing of the storage battery pack 200 by the control circuit unit 3, as shown in fig. 3, the driving control circuit 2 comprises a PWM control chip 21, a first isolation differential circuit 22, a second isolation differential circuit 23, a change-over switch K3, a first PWM-to-dc signal circuit 24, a second PWM-to-dc signal circuit 25 and a change-over switch K4; the circuit also comprises three input ends of voltage feedback loops, namely a VA end, a VB end and a VC end, two input ends of current feedback loops, namely an IA end and an IB end, a working reference input end of a voltage loop, namely a PA end, and a working reference input end of a current loop, namely a PB end, and also comprises a first PWM output end 26 and a second PWM output end 27;
the PWM control chip is respectively connected with the VA end and the VB end through the first isolation differential circuit 22 and the change-over switch K3 in sequence, and is also connected with the VC end through the first isolation differential circuit 22; the VA end, the VB end and the VC end are respectively connected with the A end, the B end and the C end;
the PWM control chip 21 is respectively connected with an IA end and an IB end through a second isolation differential circuit 23; the IA end and the IB end are respectively connected with the IOA end and the IOB end of the shunt F1;
the PWM control chip 21 is connected with the PA end through a first PWM-to-DC signal circuit 24 and connected with the PB end through a second PWM-to-DC signal circuit 25; the PA end and the PB end are directly connected to two PWM output ports of the MCU circuit unit 1; therefore, the MCU circuit unit 1 can set the working reference of the voltage feedback loop and the current feedback loop by outputting different PWM pulse width values, and the purpose of controlling output voltage and current of boost voltage-boosting discharge and buck voltage-reducing charge of the all-online charge-discharge circuit is achieved.
The PWM control chip 21 is connected to a first PWM output terminal 26 and a second PWM output terminal 27 through the switch K4, the first PWM output terminal 26 is connected to the G terminal of the PWM pulse circuit Q1, and the second PWM output terminal 27 is connected to the G terminal of the PWM pulse circuit Q2.
Wherein, mainly as shown in fig. 2 and fig. 3:
(1) the MCU circuit unit 1 controls the driving control circuit 2 to perform the boosting discharge control process as follows: the switch K3 is switched to the VA end, the switch K4 is switched to the first PWM output end 26, at the moment, the driving control circuit 2 works in a boost discharge control mode, a voltage signal FV between the A end and the C end is fed back in real time, and the voltage signal FV is processed by the first isolation differential circuit 22 and then is sent to the PWM control chip 21. The IA terminal and the IB terminal feed back the discharge current signal FA in real time by connecting the shunt F1, and the discharge current signal FA is processed by the second isolation differential circuit 23 and then sent to the PWM control chip 21. Thus, a voltage feedback loop and a current feedback loop are formed. The PA terminal and the PB terminal input two PWM signals sent from the MCU circuit unit 1, and are converted into analog voltage signals by the first PWM-to-dc signal circuit 24 and the second PWM-to-dc signal circuit 25, respectively, and sent to the PWM control chip 21 from the CV terminal and the CA terminal. Inside the PWM control chip 21, the voltage feedback loop signal FV at the CV end is compared, and if the voltage at the CV end is greater than the voltage of FV, the PWM control chip 21 will increase the PWM pulse width output by the PWM pulse circuit Q2, otherwise, decrease it. Similarly, in the PWM control chip 21, the voltage at the CA terminal is compared with the voltage feedback loop signal FA, and if the voltage at the CA terminal is greater than the voltage FA, the PWM control chip 21 increases the PWM pulse width output by the PWM pulse circuit Q2, otherwise, the PWM pulse width is decreased. Therefore, the MCU circuit unit 1 controls the all-on-line charging and discharging and control circuit unit 3 to output proper voltage and current values through the driving control circuit 2, and the process and the purpose of boosting and discharging the storage battery pack 200 are achieved.
(2) The MCU circuit unit 1 controls the drive control circuit 2 to perform the voltage reduction charging control process as follows: the change-over switch K3 is switched to the VB terminal, the change-over switch K4 is switched to the second PWM output terminal 27, at this time, the driving control circuit 2 works in the buck voltage reduction charging control mode, feeds back the voltage signal FV between the B terminal and the C terminal in real time, and sends the voltage signal FV into the PWM control chip 21 after being processed by the first isolation differential circuit 22. The IA terminal and the IB terminal feed back the discharge current signal FA in real time by connecting the shunt F1, and the discharge current signal FA is processed by the second isolation differential circuit 23 and then sent to the PWM control chip 21. Thus, a voltage feedback loop and a current feedback loop are formed. The PA terminal and the PB terminal input two PWM signals sent from the MCU circuit unit 1, and are converted into analog voltage signals by the first PWM-to-dc signal circuit 24 and the second PWM-to-dc signal circuit 25, respectively, and sent to the PWM control chip 21 by the CV terminal and the CA terminal. Inside the PWM control chip 21, the voltage at the CV end is compared with the voltage feedback loop signal FV, and if the voltage at the CV end is greater than FV, the PWM control chip 21 increases the PWM pulse width output by the PWM pulse circuit Q1, otherwise, the PWM control chip decreases. Similarly, in the PWM control chip 21, the voltage at the CA terminal is compared with the voltage feedback loop signal FA, and if the voltage at the CA terminal is greater than the voltage FA, the PWM control chip 21 increases the PWM pulse width output by the PWM pulse circuit Q1, otherwise, the PWM pulse width is decreased. Therefore, the MCU circuit unit 1 controls the all-on-line charging and discharging and control circuit unit 3 to output proper voltage and current values through the driving control circuit 2, and the process and the purpose of charging the storage battery pack 200 by voltage reduction are achieved.
The utility model discloses still include monomer collection unit 4, as shown in fig. 4, monomer collection unit 4 includes that a plurality of monomer modules 41 and a monomer collect module 42, a plurality of monomer module 41 all connects the monomer collects module 42, a plurality of monomer module 41 corresponds storage battery 200's battery cell's positive negative pole, is used for data such as real-time detection battery cell's voltage, internal resistance and utmost point post temperature. The single modules 41 summarize data to the single collection module 42 through the RS485 bus, and the single collection module 42 transmits the summarized data to the MCU circuit unit 1 through the RS485 bus. Therefore, the MCU circuit unit 1 has the relevant data of the single battery, and is matched with the group end voltage, the current and other data of the storage battery pack to form a complete data packet, and finally the complete data packet is transmitted to the background monitoring network management center through the Ethernet. Thus, the utility model discloses automatic energy-conserving online maintenance equipment 100's MCU circuit unit 1 is connected with backstage monitoring network management center and is formed automatic energy-conserving online maintenance system.
As shown in fig. 1 again, the utility model discloses still include terminal voltage acquisition circuit 51 and current acquisition circuit 52, terminal voltage acquisition circuit 51 connects in parallel at storage battery 200's both ends, current acquisition circuit 52 concatenates the one end at storage battery 200, just terminal voltage acquisition circuit 51 with current acquisition circuit 52 all with MCU circuit unit 1 connects. The terminal voltage acquisition circuit 51 and the current acquisition circuit 52 detect the online voltage, the pack terminal voltage, the charging current and the discharging current of the online battery pack 200 to be tested for the full battery pack discharge test equipment 100. On one hand, the real-time online monitoring data can be remotely transmitted to a background monitoring network management center for a user to check and early warn in real time; on the other hand, the method is used as a basis for controlling the current-stabilizing charging and discharging and judging the charging and discharging stop conditions in the charging and discharging process of the system. For example, in the discharge test process, the current magnitude measured in real time is compared with the set current magnitude, so that the control of the steady flow is realized; or for example, the system can determine whether to terminate the discharge test according to the comparison between the lowest cell voltage value and the set cell voltage lower limit threshold value.
Furthermore, the utility model discloses still include data storage and human-computer interaction circuit 6, working power supply circuit 7 to and backstage RS485 and extension circuit 8, data storage and human-computer interaction circuit 6 working power supply circuit 7 and backstage RS485 and extension circuit 8 all with MCU circuit unit 1 connects. The data storage and man-machine interaction circuit 6 provides a good data storage and man-machine interaction mode for equipment, the working power supply circuit 7 provides a working power supply for the whole equipment, and the background RS485 and the expansion circuit thereof are used for connecting a background monitoring network management center and the monomer collection module 42.
Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.
Claims (10)
1. The utility model provides an automatic energy-conserving online maintenance equipment of electric power substation battery, electric power substation includes power consumption load, communication power supply and storage battery are the power supply of power consumption load, its characterized in that: the automatic energy-saving online maintenance equipment comprises an MCU circuit unit, a drive control circuit and a full online charge-discharge and control circuit unit, wherein the full online charge-discharge and control circuit unit comprises a control input end, A, B, C three wiring terminals and a high-power diode D1, the negative electrode of the high-power diode D1 is connected with an A end, the positive electrode of the high-power diode D1 is connected with a B end, the A end is connected with the positive electrode of a communication power supply, the B end is connected with the positive electrode of a storage battery pack, and the C end is connected with the negative electrode of the; the input end of the drive control circuit is connected with the MCU circuit unit; the output end of the charge-discharge control circuit unit is connected with the control input end of the full-online charge-discharge and control circuit unit;
when the storage battery pack is in on-line boosting discharge, the MCU circuit unit controls the all-on-line charging and discharging and control circuit unit to work in a boosting mode through the drive control circuit, so that when the storage battery pack boosts and exceeds the terminal voltage of the communication power supply, the storage battery pack discharges electricity for a load;
when the storage battery pack is in on-line current-limiting charging, the MCU circuit unit controls the all-on-line charging and discharging and control circuit unit to work in a voltage reduction mode through the drive control circuit, so that the communication power supply carries out current-limiting charging on the storage battery pack until the current-limiting charging current gradually drops to a set threshold value, and then the storage battery pack is restored to an equipotential on-line connection state.
2. The automatic energy-saving online maintenance equipment for the storage battery of the power substation according to claim 1, characterized in that: the all-online charging and discharging and control circuit unit further comprises a first switch K1, a second switch K2, a PWM pulse circuit Q1, a diode D3, a PWM pulse circuit Q2, a diode D4, an inductor L1 and a current divider F1; the high-power diode D1 and the first switch K1 are connected in parallel, then the negative electrode is connected to the end A, the positive electrode is connected to the end B, the diode D3 and the PWM pulse circuit Q1 are connected in parallel, then the negative electrode is connected to the end A, and the positive electrode is connected to the IOB end of the shunt F1 through the inductor L1; the diode D4 is connected with the PWM pulse circuit Q2 in parallel, the positive electrode of the diode is connected with the C end through a second switch K2, the negative electrode of the diode is connected with the IOB end of a shunt F1 through an inductor L1, and the IOA end of the shunt F1 is connected with the B end;
when the MCU circuit unit controls the first switch K1 to be switched off through the drive control circuit and the second switch K2 to be switched on, the all-online charge-discharge and control circuit unit works in a boosting mode, and the MCU circuit unit dynamically adjusts the drive pulse width of the PWM pulse circuit Q2 in real time through the drive control circuit according to the battery discharge test current at the B end, so that the boosting of the storage battery pack is realized;
the MCU circuit unit keeps the first switch K1 disconnected through the drive control circuit, the second switch K2 is closed, the pulse of the PWM pulse circuit Q2 is closed, the pulse of the PWM pulse circuit Q1 is started and real-time pulse width adjustment is carried out, the all-online charge-discharge and control circuit unit works in a voltage reduction mode, the communication power supply carries out current-limiting charging on the storage battery pack until the current-limiting charging current gradually drops to a set threshold value, the MCU circuit unit controls the first switch K1 to be closed through the drive control circuit, the pulse of the PWM pulse circuit Q1 is closed, and finally the second switch K2 is disconnected, so that the storage battery pack is restored to the equipotential connection state with the communication power supply.
3. The automatic energy-saving online maintenance equipment for the storage battery of the power substation according to claim 2, characterized in that:
the real-time dynamic adjustment of the driving pulse width of the PWM pulse circuit Q2 is: when the system needs to increase the output voltage and the output current, the pulse width of the PWM pulse circuit Q2 is increased; otherwise, it is decreased; in the actual constant current control process, when the difference between the actual discharge current value and the set discharge current value is smaller than a certain threshold value, the adjustment is stopped;
the real-time pulse width adjustment of the PWM pulse circuit Q1 is as follows: when the system needs to increase the charging current, the pulse width of the PWM pulse circuit Q1 is increased, otherwise, the pulse width is decreased; and in the actual constant current control process, when the difference between the actual charging current value and the set charging current value is smaller than a certain threshold value, the adjustment is stopped.
4. The automatic energy-saving online maintenance equipment for the storage battery of the power substation according to claim 2, characterized in that: the drive control circuit comprises a PWM control chip, a first isolation differential circuit, a second isolation differential circuit, a change-over switch K3, a first PWM-to-DC signal circuit, a second PWM-to-DC signal circuit and a change-over switch K4; the power supply circuit also comprises three input ends of voltage feedback loops, namely a VA end, a VB end and a VC end, two input ends of current feedback loops, namely an IA end and an IB end, a working reference input end of a voltage loop, namely a PA end, and a working reference input end of a current loop, namely a PB end, and also comprises a first PWM output end and a second PWM output end;
the PWM control chip is respectively connected with the VA end and the VB end through a first isolation differential circuit and a change-over switch K3 in sequence, and is also connected with the VC end through the first isolation differential circuit; the VA end, the VB end and the VC end are respectively connected with the A end, the B end and the C end;
the PWM control chip is respectively connected with an IA end and an IB end through a second isolation differential circuit; the IA end and the IB end are respectively connected with the IOA end and the IOB end of the shunt F1;
the PWM control chip is connected with the PA end through a first PWM-to-DC signal circuit and is connected with the PB end through a second PWM-to-DC signal circuit; the PA end and the PB end are directly connected to two PWM output ports of the MCU circuit unit;
the PWM control chip is respectively connected with a first PWM output end and a second PWM output end through the change-over switch K4, the first PWM output end is connected with the G end of the PWM pulse circuit Q1, and the second PWM output end is connected with the G end of the PWM pulse circuit Q2.
5. The automatic energy-saving online maintenance equipment for the storage battery of the power substation according to claim 1 or 2, characterized in that: the high-power diode D1 is formed by one or two high-power diodes connected in parallel.
6. The automatic energy-saving online maintenance equipment for the storage battery of the power substation according to claim 1 or 2, characterized in that: the device also comprises a monomer acquisition unit, a terminal voltage acquisition circuit and a current acquisition circuit;
the single collecting unit comprises a plurality of single modules and a single collecting module, the single modules are connected with the single collecting module, and the single modules correspond to the positive and negative electrodes of the single batteries of the storage battery pack one by one;
the terminal voltage acquisition circuit is connected in parallel with two ends of the storage battery pack, the current acquisition circuit is connected in series with one end of the storage battery pack, and the terminal voltage acquisition circuit and the current acquisition circuit are both connected with the MCU circuit unit.
7. The automatic energy-saving online maintenance equipment for the storage battery of the power substation according to claim 1 or 2, characterized in that: the MCU circuit unit is connected with the data storage and human-computer interaction circuit.
8. The automatic energy-saving online maintenance equipment for the storage battery of the power substation according to claim 1 or 2, characterized in that: the MCU circuit unit is connected with the working power supply circuit.
9. The automatic energy-saving online maintenance equipment for the storage battery of the power substation according to claim 1 or 2, characterized in that: the MCU circuit unit is connected with the background RS485 and the expansion circuit thereof, and the background RS485 and the expansion circuit thereof are connected with the MCU circuit unit.
10. The utility model provides an automatic energy-conserving online maintenance system of electric power substation battery which characterized in that: the automatic energy-saving online maintenance equipment comprises the automatic energy-saving online maintenance equipment as claimed in any one of claims 1 to 6, and further comprises a background monitoring network management center, wherein the background monitoring network management center is connected with the MCU circuit unit through an Ethernet.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821041593.6U CN208638048U (en) | 2018-07-03 | 2018-07-03 | A kind of the automatic energy saving on-line maintenance equipment and system of electricity substation battery |
| CN201810714859.7A CN108718104B (en) | 2018-07-03 | 2018-07-03 | Automatic energy-saving on-line maintenance equipment and system for storage battery of power substation |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821041593.6U CN208638048U (en) | 2018-07-03 | 2018-07-03 | A kind of the automatic energy saving on-line maintenance equipment and system of electricity substation battery |
| CN201810714859.7A CN108718104B (en) | 2018-07-03 | 2018-07-03 | Automatic energy-saving on-line maintenance equipment and system for storage battery of power substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208638048U true CN208638048U (en) | 2019-03-22 |
Family
ID=91852039
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821041593.6U Withdrawn - After Issue CN208638048U (en) | 2018-07-03 | 2018-07-03 | A kind of the automatic energy saving on-line maintenance equipment and system of electricity substation battery |
| CN201810714859.7A Active CN108718104B (en) | 2018-07-03 | 2018-07-03 | Automatic energy-saving on-line maintenance equipment and system for storage battery of power substation |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810714859.7A Active CN108718104B (en) | 2018-07-03 | 2018-07-03 | Automatic energy-saving on-line maintenance equipment and system for storage battery of power substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN208638048U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108718104A (en) * | 2018-07-03 | 2018-10-30 | 福州福光电子有限公司 | A kind of the automatic energy saving on-line maintenance equipment and system of electricity substation accumulator |
| CN111722125A (en) * | 2020-06-28 | 2020-09-29 | 国网山东省电力公司威海供电公司 | Online energy-saving storage battery capacity test equipment |
| CN113504478A (en) * | 2021-07-09 | 2021-10-15 | 广东电网有限责任公司 | Storage battery pack charging and discharging test system |
| CN117233644A (en) * | 2023-11-13 | 2023-12-15 | 国网甘肃省电力公司白银供电公司 | State evaluation method and system for storage battery pack of transformer substation |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113341322A (en) * | 2021-05-08 | 2021-09-03 | 贵州电网有限责任公司 | One drags many on-line energy-saving storage battery capacity testing arrangement |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190902147A (en) * | 1909-01-29 | 1910-03-29 | Alfred Mills Taylor | Improvements in Electric Accumulator Substations Fed from Alternating Current Systems. |
| CN101860052B (en) * | 2010-04-09 | 2012-10-03 | 福州福光电子有限公司 | Discharging test device for full online storage battery |
| CN107677969A (en) * | 2017-10-25 | 2018-02-09 | 福州福光电子有限公司 | The charge/discharge test device of distributed complete online batteries |
| CN107884722B (en) * | 2017-11-29 | 2024-05-28 | 福州福光电子有限公司 | Online distributed storage battery monitoring equipment |
| CN208638048U (en) * | 2018-07-03 | 2019-03-22 | 福州福光电子有限公司 | A kind of the automatic energy saving on-line maintenance equipment and system of electricity substation battery |
-
2018
- 2018-07-03 CN CN201821041593.6U patent/CN208638048U/en not_active Withdrawn - After Issue
- 2018-07-03 CN CN201810714859.7A patent/CN108718104B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108718104A (en) * | 2018-07-03 | 2018-10-30 | 福州福光电子有限公司 | A kind of the automatic energy saving on-line maintenance equipment and system of electricity substation accumulator |
| CN108718104B (en) * | 2018-07-03 | 2024-02-13 | 福州福光电子有限公司 | Automatic energy-saving on-line maintenance equipment and system for storage battery of power substation |
| CN111722125A (en) * | 2020-06-28 | 2020-09-29 | 国网山东省电力公司威海供电公司 | Online energy-saving storage battery capacity test equipment |
| CN113504478A (en) * | 2021-07-09 | 2021-10-15 | 广东电网有限责任公司 | Storage battery pack charging and discharging test system |
| CN117233644A (en) * | 2023-11-13 | 2023-12-15 | 国网甘肃省电力公司白银供电公司 | State evaluation method and system for storage battery pack of transformer substation |
| CN117233644B (en) * | 2023-11-13 | 2024-03-15 | 国网甘肃省电力公司白银供电公司 | State evaluation method and system for storage battery pack of transformer substation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108718104B (en) | 2024-02-13 |
| CN108718104A (en) | 2018-10-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208638048U (en) | A kind of the automatic energy saving on-line maintenance equipment and system of electricity substation battery | |
| CN202197226U (en) | Power station direct current power supply device based on super capacitor | |
| CN102882268B (en) | Undisturbed uninterruptible power supply device | |
| CN201238200Y (en) | Intelligent generator set for uninterrupted power supply | |
| CN107144796B (en) | Feedback type storage battery pack nuclear capacity discharging device and application method | |
| CN105680559B (en) | A kind of transformer station direct current system | |
| CN203056660U (en) | Intelligent charger for electric car | |
| CN101860051A (en) | Charge/discharge test device for distributed full online storage battery pack | |
| CN100490274C (en) | Integrated managing device and its managing method for accumulator charging and discharging | |
| CN113507162A (en) | Automatic capacity checking device and capacity checking method for direct current power supply system of transformer substation | |
| CN107895997B (en) | Energy system with multi-energy composite power supply | |
| CN101860052B (en) | Discharging test device for full online storage battery | |
| CN211377693U (en) | Power transmission line hybrid power supply based on solar energy and induction energy obtaining | |
| CN102055203B (en) | Power supply device for intelligently adjusting power grid load peak and valley in communication base station | |
| CN201177349Y (en) | Air conditioner controller and air conditioning system | |
| CN201656535U (en) | Full on-line accumulator battery charge and discharge test equipment | |
| CN101860050A (en) | Discharge test device for distributed full online storage battery pack | |
| CN201674256U (en) | Full-on-line storage battery pack discharge test equipment | |
| CN201674257U (en) | Distributed full-online storage battery discharge testing equipment | |
| CN201639336U (en) | Distributed type full-online storage battery charge-discharge testing equipment | |
| CN204597597U (en) | A kind of domestic solar electric power system | |
| CN209119827U (en) | A kind of automatic energy saving on-line maintenance apparatus and system of petrochemical industry communication base station battery | |
| CN207398829U (en) | A kind of intelligent power system based on DSP | |
| CN105870998B (en) | A kind of rectification module dormancy control method of transformer station direct current system | |
| CN205724935U (en) | A kind of grid-connected photovoltaic system with intelligent power dividing function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190322 Effective date of abandoning: 20240213 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190322 Effective date of abandoning: 20240213 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |