CN206712539U - A kind of marine low-pressure continuous-current plant based on the autonomous management of multiple batteries - Google Patents
A kind of marine low-pressure continuous-current plant based on the autonomous management of multiple batteries Download PDFInfo
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- CN206712539U CN206712539U CN201720508646.XU CN201720508646U CN206712539U CN 206712539 U CN206712539 U CN 206712539U CN 201720508646 U CN201720508646 U CN 201720508646U CN 206712539 U CN206712539 U CN 206712539U
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Abstract
The utility model provides a kind of marine low-pressure continuous-current plant based on the autonomous management of multiple batteries, including Logic control module, exchanges input module, direct current output module and direct current bus-bar；Exchange input module includes ac input circuit, the transformer group being made up of some transformers being connected in parallel；Direct current output module includes rectifier, the charger group being made up of some chargers, if connection charger group and the batteries being made up of dry battery, some auxiliary power supply circuits are formed with configuration, isolation circuit is connected between adjacent two auxiliary power supply circuits；Logic control module gathers the sampled signal of ac input circuit, rectifier, charger group, batteries and direct current bus-bar.By the utility model, realize the intelligent autonomous management of marine low-pressure continuous-current plant and the discharge and recharge to batteries carries out restricted protection, improve the adaptability of marine low-pressure continuous-current plant and the flexibility of dilatation.
Description
Technical Field
The utility model relates to a marine engineering technology field, more specifically relate to a marine low pressure DC power supply device based on a plurality of batteries are management independently.
Background
In a ship made of alternating current, a low-voltage direct current power supply device for the ship is usually installed, can receive, convert, store and distribute electric energy, has the functions of monitoring, protecting, controlling and the like, and is used for continuously, stably and reliably supplying power for important direct current equipment such as communication navigation instruments, emergency lighting and the like so as to meet the requirement of the safe navigation guarantee capability of the ship. Under normal conditions, the device rectifies a power supply of a power station and supplies power to direct-current equipment, and meanwhile, the storage batteries are connected in parallel and float charged; when the power supply of the power station loses power or the rectifier in the device fails, the storage battery supplies power to the direct current equipment and the power consumption time required by ship specification is met.
The marine low-voltage direct-current power supply device is a key link for safe and reliable operation of a ship power system, and is continuously improved in design production and practical application in recent years. When direct current equipment is more, it is long in order to guarantee that the power supply is long to need assemble a plurality of batteries and discharge in succession, but because pursuit the price/performance ratio, this type of power supply unit has a great deal of technical defect in the existing market, is difficult to satisfy demands such as safe being suitable for, simple operation, easy to maintain, mainly has following problem:
1. the monolithic structural design makes installation, manufacturing and maintenance difficult, and is not conducive to technology upgrade and capacity expansion. For example, all batteries are powered by chargers, requiring a larger power charger, reducing system reliability and driving up manufacturing costs.
2. The overall performance and the control strategy are not perfect enough, the functions of complete state monitoring, fault diagnosis and automatic processing are mainly lacked, the accident troubleshooting is totally determined by manual field judgment, the labor consumption is high, the handling efficiency is low, the opportunity for coping with errors is delayed, the misoperation risk is high, the reliable power supply is influenced, and even the safety of the ship is endangered.
3. The duration of power supply of the storage battery is pursued on one side, the safety of power supply of equipment and the reasonable use of the storage battery are neglected, and the reliability of the system and the service life of the storage battery are directly influenced. For example, when the storage battery is switched to supply power, the power is briefly cut off, so that the safe operation of equipment is influenced; the power supply is stopped when the discharge of the storage battery is over, so that the storage battery is damaged to cause premature aging and failure, and the effective service life is shortened; when the storage battery is replaced, the power supply must be cut off for the safety of equipment, and the continuous power supply is influenced.
In view of the above, there is a need for an improved low voltage dc power supply for ships in the prior art to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to disclose a marine low pressure DC power supply unit based on a plurality of batteries are from master management for realize the intelligent from master management of marine low pressure DC power supply unit, realize carrying out restrictive protection to the charge-discharge of battery, and realize that arbitrary battery can guarantee the continuous power supply to consumer when changing, strengthen marine low pressure DC power supply unit's adaptability, and improve the flexibility of dilatation.
In order to achieve the above object, the utility model provides a marine low pressure dc power supply device based on a plurality of batteries are independently managed, include: the logic control module, and an alternating current input module, a direct current output module and a direct current bus which are respectively connected with the logic control module; wherein,
the alternating current input module comprises an alternating current input circuit respectively connected with a main power supply and an emergency power supply and a transformer bank consisting of a plurality of transformers connected in parallel;
the direct current output module comprises a rectifier connected with the alternating current input circuit, a charger group connected with the transformer group and composed of a plurality of chargers, and a storage battery group connected with the charger group and composed of a plurality of storage batteries so as to configure and form a plurality of auxiliary power supply lines, and an isolation circuit is connected between two adjacent auxiliary power supply lines;
the rectifier and a plurality of storage batteries in the storage battery pack are respectively and independently connected to the direct current bus;
the logic control module collects sampling signals of the alternating current input circuit, the rectifier, the charger group, the storage battery pack and the direct current bus bar.
As a further improvement of the utility model, the charger is intelligent AC/DC converter to according to the state information of each battery in the storage battery, adopt constant current voltage limiting charge mode, constant voltage current limiting charge mode and trickle charge mode respectively, realize the conversion to the charge stage of battery.
As a further improvement of the present invention, the isolation circuit is composed of two diodes connected in reverse.
As a further improvement of the present invention, the logic control module includes: a microprocessor controller, a PIC processor, or a PLC controller.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the modular unit structure is adopted, so that the design, production, assembly, maintenance and overhaul are facilitated, the research and development, the production period and the cost reduction are facilitated to be shortened, the system function is easily upgraded to widen the application range, the capacity of the storage battery pack is conveniently expanded to prolong the power supply time, the bottleneck that a high-performance marine low-voltage direct-current power supply device cannot be popularized is solved, and the reliable power supply of direct-current equipment and the safety of ship navigation are ensured.
2. By the optimized design of the elements such as the operation parameters, the control logic and the like, the functions of monitoring, alarming, fault diagnosis, replacement of manual intervention automatic processing and the like are realized, the problems of single function, incomplete control strategy, low operation efficiency, high labor intensity, poor reliability and the like of similar power supply devices are solved, the performance parameters can be flexibly adjusted according to the requirements to accurately control the working process, the control precision and the stability are improved, and the device has the advantages of comprehensive monitoring and protection, strong self-adaption capability, high intelligent degree, convenience in operation and maintenance, good maintainability, high reliability and the like.
3. The principle of giving consideration to both equipment power supply safety and reasonable use of the storage battery is adopted, and through the optimized layout of hardware and strict setting of programs, the storage battery is favorable for maintaining safety and prolonging service life on the basis of realizing the power supply function of the power supply device, and charging and discharging safety and electric energy quality are ensured.
Drawings
Fig. 1 is a block diagram illustrating an overall structure of a marine low-voltage dc power supply apparatus based on autonomous management of a plurality of storage batteries according to the present invention;
FIG. 2 is a circuit diagram of a power plant power circuit;
FIG. 3 is a circuit diagram of the battery pack charging and discharging circuit;
FIG. 4 is a circuit diagram of a control circuit;
FIG. 5 is a flow chart of the power failure control of the whole ship according to the present invention;
FIG. 6 is a flow chart of the control of the fault of the rectifier according to the present invention;
FIG. 7 is a control flow chart of the present invention in dealing with charging failure;
fig. 8 is a control flow chart of the battery replacement mode according to the present invention.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functional, method, or structural equivalents and substitutions made by these embodiments are within the scope of the present invention.
Fig. 1 to 8 show an embodiment of a marine low-voltage dc power supply apparatus based on autonomous management of a plurality of storage batteries according to the present invention.
Fig. 1 is a block diagram showing an overall structure of a marine low-voltage dc power supply device (hereinafter, referred to as "power supply device") based on autonomous management of a plurality of storage batteries, the power supply device including an ac input module 10, a dc output module 20, a logic control module 30, and a dc bus bar 40.
It should be noted that, in this specification, the term "main power source" and the term "main power source" have equivalent technical meanings, and the term "emergency power source" have equivalent technical meanings; specifically, a "main power supply" or a "main distribution board" is supplied with power by the main distribution board, and an "emergency power supply" or an "emergency distribution board" is supplied with power by the emergency distribution board. In this specification, the term "connected" or the term "connected" has a technical effect of electrical connection.
In the embodiment, the main power supply, the emergency power supply, the ac input circuit 11, the rectifier 21, the charger group 22, the battery pack 23, the logic control module 30 and the dc output bus 40 are connected in order to realize the basic function of supplying dc power to various dc power devices on the ship, the power supply device can identify the emergency situations such as power loss of the main distribution board and the distribution board, the fault of the rectifier 21, the fault of any charger in the charger group 22 and the like, can process the emergency situations of the storage battery 23 in the charging and discharging process, the storage battery pack 23 is restrictively protected in the charging and discharging process, and when any storage battery in the storage battery pack 23 is replaced, the power supply device can continuously supply power, the monitoring and alarming system can send various operation state parameters and alarming information to a power station and an engine room monitoring and alarming system, and visual data and information are provided for a crew on duty.
Referring to fig. 1 and 2, in the ac input module 10, two power station power sources, i.e., a main power source and an emergency power source, respectively from a main distribution board, a secondary power source and an emergency power source, can be connected to the ac input circuit 11, the ac input circuit 11 is connected to the rectifier 21 and the transformer bank 12 composed of a plurality of transformers, the transformer bank 12 composed of a plurality of transformers is connected to the charger bank 22 composed of a plurality of chargers, the charger bank 22 is connected to the storage battery pack 23 composed of a plurality of storage batteries, and finally the rectifier 21 and the storage battery pack 23 are connected to the dc bus 40, and a plurality of dc devices are respectively connected to the output end of the dc bus 40 to maintain the dc power supply of the dc devices. The number of the transformers, the number of the chargers and the number of the storage batteries are equal, and the transformers, the number of the chargers and the number of the storage batteries are mutually in parallel connection. The ac input circuit 11 is shown as a dashed box in fig. 2.
The ac input module 10 has a power priority selection function. Under normal conditions, one of the two station power sources is connected to the power supply device through the ac input circuit 11. The ac input circuit 11 is respectively connected to the rectifier 21 and the transformer bank 12 (i.e., No. 1 transformer to No. n transformer in fig. 1), the transformer bank 12 is connected to the charger bank 22 (i.e., No. 1 charger to No. n charger in fig. 1), the charger bank 22 charges the storage battery pack 23 (i.e., No. 1 storage battery to No. n storage battery in fig. 1), and finally the rectifier 21 and the storage battery pack 23 supply power to a plurality of dc devices (i.e., No. 1 dc device to No. m dc device in fig. 1).
In the present embodiment, the dc output module 20 includes a rectifier 21 connected to the ac input circuit 11, a charger group 22 connected to the transformer group 12 and composed of n chargers, and a battery pack 23 connected to the charger group 22 and composed of n batteries, and the transformer group 12 includes n transformers coupled to the ac input circuit 11, so that n auxiliary power supply lines are configured. By the connection mode, capacity expansion can be conveniently carried out; meanwhile, an independent transformer is adopted to connect an independent charger and an independent storage battery, so that a high-power charger is not required to be matched, the reliability of the power supply device can be improved, and the manufacturing cost can be reduced.
The power priority selection function is specifically as follows: if the main distribution board is powered, the main distribution board supplies power preferentially; if only the main distribution board loses power, the main distribution board is switched to the corresponding distribution board for supplying power; if the power supply of the distribution board is needed, the main distribution board is recovered to be powered on and is switched to the main distribution board for power supply.
In the dc output module 20, each battery in the battery pack 23 is provided with an independent charger (in the charger group 22), and both the battery pack 23 and the rectifier 21 can be independently connected to the dc bus 40, and then connected to a plurality of dc devices through the dc bus 40, and all supply power to the plurality of dc devices connected in parallel through the dc bus 40.
In normal conditions, the main or sub-panel of the station supplies the dc devices via the rectifier 21. If the main distribution board and the distribution board are both power-off or if the rectifier 21 fails, the storage batteries in the storage battery pack 23 in a parallel structure are used for supplying power in sequence and continuously so as to ensure the power utilization duration required by ship specifications. If the main distribution board or the distribution board to be supplied with power is restored when the rectifier 21 is not in a failure, or if the rectifier 21 is removed from the failure when the main distribution board or the distribution board to be supplied with power, the power supply mode of the station power supply is switched.
In the present embodiment, the charger 22 employs an intelligent AC/DC converter, the whole charging process is divided into three stages, namely a main charging stage, an even charging stage and a floating charging stage, and a constant-current voltage-limiting charging mode, a constant-voltage current-limiting charging mode and a trickle charging mode are respectively employed, and charging parameters can be adjusted in real time according to the status information of each storage battery in the storage battery pack 23, so as to respectively convert the charging stage from the storage battery No. 1 to the storage battery No. n.
After the power supply device is started, when the logic control module 30 detects that the terminal voltage of any storage battery in the storage battery pack 23 is lower than the float charging voltage-stabilizing value and cannot be recovered after time delay, the storage battery pack 23 is charged according to a set mode to ensure that the storage battery pack is in a nominal capacity standby state, the utilization efficiency is improved, and the service life is prolonged.
The logic control module 30 is electrically connected to the ac input circuit 11 of the ac input module 10, the rectifier 21, the charger 22, the storage battery 23 of the dc output module 20, and the dc bus bar 40 to collect the sampling signals of the ac input circuit 11, the rectifier 21, the charger group 22, the storage battery 23, and the dc bus bar 40, so as to monitor and control comprehensively and ensure that the power supply apparatus is in a good operational status. Specifically, the logic control module 30 may be a micro-processing controller (MCU) or a PIC processor or a PLC controller, and is most preferably a micro-processing controller (MCU), so that the advantages of fast operation speed, strong logic judgment capability, and the like of the MCU are fully exerted.
The specific functions of the logic control module 30 mainly include the following three aspects.
Firstly, receiving various sampling signals of the ac input module 10 and the dc output module 20, and specifically: receiving a sampling signal of the ac input circuit 11, receiving a sampling signal of the rectifier 21, receiving sampling signals of the plurality of chargers in the charger group 22, receiving sampling signals of the plurality of secondary batteries in the secondary battery group 23, and receiving sampling signals of the dc bus 40.
And secondly, performing operation processing according to a preset program according to the received sampling signal to obtain a corresponding operation result.
And thirdly, outputting a control instruction according to the operation result to realize the optimized operation of the system, so that the optimal matching of power supply, electric energy storage and equipment requirements is achieved, and meanwhile, state information display and fault alarm are carried out.
The hardware design of the marine low-voltage dc power supply apparatus based on autonomous management of a plurality of storage batteries according to the present embodiment is as follows. For the sake of convenience of explanation, the following describes a power supply apparatus in which two secondary batteries are arranged, a power supply apparatus in which two or more secondary batteries are arranged, and the like.
A circuit diagram of a power plant power line as shown in figure 2. The main distribution board and the auxiliary distribution board can input 380V three-phase alternating current through an alternating current bus bar which is a No. 1 transformer, a No. 2 transformer and a rectifier 21. The No. 1 transformer and the No. 2 transformer are both 380V/220V transformers, so that three-phase 380V alternating current is changed into three-phase 220V alternating current. Meanwhile, the transformer 1 supplies power for the charger 1, the transformer 2 supplies power for the charger 2, and then the charger 1 and the charger 2 respectively charge the storage battery 1 and the storage battery 2.
In normal condition, switch K is shown in FIG. 2MAnd switch KEAnd switching on, wherein the main distribution board or the auxiliary distribution board supplies power to the direct current equipment through the rectifier 21 and the charger 22, and the No. 1 storage battery and the No. 2 storage battery in the storage battery pack 23 are charged. If two power station power supplies are all electrified (namely, the main distribution board and the corresponding distribution board are all electrified), the time relay KT2Time delay t of normally open contact2And the switch can be closed after a second, so that the main distribution board can be ensured to be supplied with power preferentially.
Once the main distribution board is out of power, the time relay KT1When power is lost, its normally closed contact KT1-1 delay time t1Closed after second and with time relay KT2When power is on, its normally open contact KT2-1 and a delay of t2Closing after seconds, i.e. due to panel delay t1+t2And after the power is supplied, the main distribution board can still supply power after the main distribution board is instantly powered off and is recovered to be powered on.
When the main distribution board is powered, if the main distribution board is recovered to be powered, the time relay KT1When power is on, its normally closed contact KT1-1 disconnection; AC contactor KM2When power is lost, its normally open contact KM2-1 open, normally closed contact KM2-2 closure; then AC contactor KM1When power is on, its normally open contact KM1-1 closed, powered by the main switchboard instead.
In addition, the relay K1Relay K2Relay K3And relay K4A corresponding fault signal is provided and sent to the logic control module 30, see in particular the control line section (see fig. 4).
Fig. 3 shows a battery charging and discharging circuit. Rectifier 21 via diode D0Connected with a DC bus, No. 1 charger via a diode D1And a diode D2Connected with a DC bus, a No. 1 storage battery passes through a diode D2And straightThe flow busses are connected. Rectifier 21 voltage pass diode D0No. 1 charger voltage passing diode D1And a diode D2No. 1 storage battery voltage passing diode D2Both are followed by a pressure drop; if the rectifier 21 is adjusted so that the output value after the voltage drop is larger than the output value after the voltage drop of the charger No. 1 and the storage battery No. 1, the power supply from the rectifier 21 to the direct current bus bar 40 is ensured. The No. 1 charger estimates the current capacity of the No. 1 storage battery according to the charging voltage, current and other parameters of the No. 1 storage battery, so as to adjust the output voltage and current of the No. 1 storage battery. An isolation circuit is connected between a charging and discharging line consisting of the No. 1 charger and the No. 1 storage battery and another charging and discharging line consisting of the No. 2 charger and the No. 2 storage battery, and the isolation circuit is composed of a diode D in reverse connection5And a diode D6And the two charging and discharging lines are isolated.
In order to prevent the over-charge and over-discharge of the No. 1 storage battery from influencing the service life and ensure the power supply quality of equipment, the charging and discharging voltage and current ranges of the No. 1 storage battery are set, and the logic control module 30 synthesizes the state parameters of the No. 1 charger and the No. 1 storage battery to dynamically implement a safety protection strategy.
Specifically, in the charging mode, in order to prevent the charging voltage of the No. 1 storage battery from being overhigh or the charging current from being overhigh, overvoltage and current-limiting protection measures are provided; if the charging voltage or the charging current is higher than the safety threshold, the No. 1 charger stops charging.
In the discharging mode, in order to prevent the discharging voltage of the No. 1 storage battery from being too low or the discharging current from being too high, undervoltage and current-limiting protection measures are provided; and if the discharge voltage is lower than the safety threshold or the discharge current is higher than the safety threshold, stopping discharging the No. 1 storage battery.
Similarly, the No. 2 transformer, the No. 2 charger, and the No. 2 battery are used as an independent charging and discharging circuit and other charging and discharging circuits, refer to the above discussion.
Referring to a circuit diagram of a part of control lines of the logic control module 30 shown in fig. 4, the marine low-voltage dc power supply apparatus based on autonomous management of a plurality of storage batteries is effectively managed by combining fig. 2 and fig. 3, so as to implement functions of monitoring and alarming, fault diagnosis, operation control, and the like.
The block in the middle part with thick part shows the logic control module 30, which can be selected from PLC or single chip microcomputer, various devices and related circuits provide input signals for the controller, and the output port of the controller is switched on and off through the relay control device and the circuit and outputs alarm signals. The logic control module 30 is respectively connected with the relays K1Relay K30Switch S1Switch S2Switch S3。
Wherein, the relay K1～K10Contact head K1-1～K10-1, relay K11Contact head K11-1、K11-2, relay K12Contact head K12-1、K12-2 input of a state sampling signal, switch S1Switch S2And switch S3Respectively a storage battery replacement mode, an alarm silencing button and an alarm reset button.
Relay K13～K16Output control signal, relay K17～K30And outputting an alarm signal, wherein BZ is a buzzer used when the alarm is triggered.
The relays involved in fault monitoring alarms are explained next.
Relay K1Providing an alternating current power supply power loss signal, namely, the main distribution board and the main distribution board are both in power loss, and the power loss of the whole ship occurs at the moment (see figure 2); relay K2Providing an ac power phase loss signal (see fig. 2); relay K3Providing an alternating current power supply undervoltage signal (see figure 2), and processing according to a control flow for controlling the whole ship power failure if the alternating current power supply is undervoltage or phase failure; relay K1And an intermediate relay K4In combination, provide a rectifier fault signal (see fig. 2); relay K1And an intermediate relay K5In combination, can provide a charger fault signal No. 1 (see fig. 2, 3); likewise, a relay K1And an intermediate relay K6Are combined withProviding a No. 2 charger fault signal; relay K7And relay K8Providing charging current fault signals for the storage battery No. 1 and the storage battery No. 2 respectively (see figure 3); relay K9And relay K10Providing discharge current fault signals for batteries No. 1 and No. 2, respectively (see fig. 3); relay K11And relay K12The charge and discharge voltage failure signals of the No. 1 battery and the No. 2 battery are provided respectively (see FIG. 3). The above monitoring signals provided by the relay are collected by the logic control module 30 and all can trigger a fault alarm.
The process of the logic control module 30 fault diagnosis is explained next.
Relay K1Relay K2And relay K3And any one of the power loss diagnoses is power loss of the whole ship. Relay K with all three relays energized4When the power is lost, the failure of the rectifier 21 is diagnosed, and the relay K5If the power is lost, the No. 1 charger is diagnosed to be in fault, and the relay K6And when the power is lost, the failure of the No. 2 charger is diagnosed.
The process of the logic control module 30 processing the fault and outputting the signal through the relay action will be described next.
Relay K13Relay K14The actions are respectively to make the relay KM in the figure 33Normally closed contact KM3-1 and a relay KM4Normally closed contact KM4And 1, disconnecting the input power supplies of the No. 1 charger and the No. 2 charger, and stopping charging of the No. 1 storage battery and the No. 2 storage battery.
Relay K15Relay K16The actions are respectively to make the relay KM in the figure 35Normally closed contact KM5-1 and a relay KM6Normally closed contact KM6-1 disconnection, stopping discharging batteries 1 and 2.
Relay K17Relay K30The output alarm signal can be directly displayed or extended to a monitoring alarm system of a power station and a cabinAnd (4) a system.
Relay K in FIG. 3 in case of controller failure or replacement13Relay K16Contact K13-1～K16-1 is kept normally open, relay KM3Relay KM4Relay KM5And relay KM6When the power is lost, the relay KM at the power supply input end of the No. 1 charger3Contact KM3Relay KM of power supply input terminal of charger nos. 1 and 24Contact KM4-1 and relay KM of power supply output end of No. 1 charger5Contact KM5Relay KM of power supply output end of No. 1 and No. 2 chargers6Contact KM6-1 remains normally closed, thus ensuring that the battery charge or discharge continues.
The process of replacing a battery will be described in detail below.
Switch S1The switch (ON/OFF) is selected for the battery replacement mode, and any one of the batteries can be safely replaced without affecting the power supply of the rectifier 21.
In order to achieve the above design objective, in addition to improving hardware design, the control flow is also directly related to the function, performance and application effect of the power supply device, and it is necessary to design a control flow for dealing with situations such as power loss of the whole ship, rectifier failure, charging failure, and battery replacement.
The whole ship power failure control flow is explained in detail below.
In the initial state, the main distribution board or the distribution board supplies power to the plurality of direct current devices through the rectifier 21, and the No. 1 battery and the No. 2 battery are both in a charging state. Once the alternating current power supply loses power, or the alternating current power supply is open-phase, or the alternating current power supply is under-voltage, the power loss of the whole ship occurs, and the control flow is shown in figure 5 at the moment.
In fig. 3, relay KM5Contact KM5-1, relay KM6Contact KM6Battery No. 1 and battery No. 2 are momentarily connected in parallel and powered, and last for about L seconds (as the case may be).
Next, in FIG. 4, a relay K16Electrified relay KM6Contact KM61 is disconnected, and the output of the No. 2 storage battery is disconnected.
Relay KM5Contact KM5-1 remains closed and is powered separately by battery No. 1.
In the process of supplying power to the No. 1 storage battery, if the condition 1 is detected: when the AC power supply is powered on and the phase failure and undervoltage failure are eliminated, the AC power supply is immediately restored to the initial state.
If condition 2 is detected: battery No. 1 has a discharge current higher than a safety threshold for M seconds (set as the case may be), or condition 3: the discharge voltage of the No. 1 storage battery is lower than the safety threshold value and lasts for N seconds (set according to the situation), and then the relay K16Power-off relay KM6Contact KM6And (4) closing the 1 storage battery, and instantly and parallelly supplying power to the No. 1 storage battery and the No. 2 storage battery so as to avoid instant power loss of the electric equipment during switching and keep about T seconds (set according to the situation).
Next, the relay K in FIG. 415Electrified relay KM5Contact KM51 is disconnected, and the output of the No. 1 storage battery is disconnected. Relay KM6Contact KM6-1 remains closed and the separate power supply is started by battery No. 2.
On the contrary, if none of the three conditions is detected, the No. 1 storage battery continues to supply power. Meanwhile, the logic control module 30 is required to detect that the discharge current of the battery No. 1 is higher than the safety threshold value and continues for a certain time, or the discharge voltage is lower than the safety threshold value and continues for a certain time, and then the condition is confirmed to be met; if the discharge current and the discharge voltage return to normal values within a predetermined time, it is considered that the conditions are not satisfied.
Similarly, in the process of supplying power, if the condition 1 is detected, the storage battery No. 2: when the AC power supply is powered on and the phase failure and undervoltage failure are eliminated, the AC power supply is immediately restored to the initial state.
If a strip is detectedPiece 2: the discharge current of battery No. 2 is higher than the safety threshold and lasts for M seconds, or condition 3: the discharge voltage of the No. 2 storage battery is lower than the safety threshold value and lasts for N seconds, and then the relay K16Electrified relay KM6Contact KM6And 1 is disconnected, the output of the No. 2 storage battery is disconnected, and the discharge is finished.
On the contrary, if none of the three conditions is detected, the No. 2 storage battery continues to supply power.
When the No. 1 storage battery and the No. 2 storage battery are in the output disconnection and discharge stop state, if the AC power supply is detected to be electrified and the phase failure and undervoltage faults are eliminated, the initial state is immediately recovered; otherwise, the state is kept unchanged.
In the whole process, as long as the alternating current power supply is powered on and the phase failure and undervoltage faults are eliminated, the alternating current power supply is immediately recovered to the initial state.
Next, a control flow when the rectifier 21 fails will be described in detail.
In the initial state, the main or sub-panel supplies the dc power supply via the rectifier 21, and the two batteries are charged. Once a failure of the rectifier 21 is detected, the control flow is now shown in fig. 6.
In fig. 3, relay KM5Contact KM5-1, relay KM6Contact KM6And (4) keeping the 1 closed, and instantaneously supplying power to the No. 1 storage battery and the No. 2 storage battery in parallel for about L seconds.
Next, the relay K in FIG. 416Electrified relay KM6Contact KM6-1 open, relay KM4Contact KM4-1 remains closed and battery No. 2 output is open and charged.
Relay K in FIG. 413Electrified relay KM3Contact KM3-1 open, relay KM5Contact KM5The-1 remains closed, the battery input No. 1 is open and the individual power supply is started.
In the process of supplying power to the No. 1 storage battery, if the condition 1 is detected: the rectifier 21 is cleared and immediately restored to the original state. If condition 2 is detected: the discharge current of battery No. 1 is higher than the safety threshold and lasts for M seconds, or condition 3: the discharge voltage of the No. 1 storage battery is lower than the safety threshold value and lasts for N seconds, and then the relay K16Power-off relay KM6Contact KM6And (3) closing 1, and instantly supplying power to the No. 1 storage battery and the No. 2 storage battery in parallel so as to avoid instant power loss during switching and maintain about T seconds.
Next, the relay K13Power-off relay KM3Contact KM31 closed, Relay K in FIG. 415Electrified relay KM5Contact KM51 is disconnected, battery output No. 1 is disconnected and charging is started.
Relay K in FIG. 414Electrified relay KM4Contact KM4-1 open, relay KM6Contact KM6The-1 remains closed, the No. 2 battery input is open and the individual power supply is started.
In the process of supplying power to the No. 2 storage battery, if the condition 1 is detected: the rectifier 21 is cleared and immediately restored to the original state. If condition 2 is detected: battery No. 2 discharge current is above the safety threshold and lasts for M seconds, or condition 3: the discharge voltage of the No. 2 storage battery is lower than the safety threshold value and lasts for N seconds, and then the relay K14Power-off relay KM4Contact KM4-1 closed and relay K16Electrified relay KM6Contact KM6The-1 is disconnected, the No. 2 battery output is disconnected and charging is started. On the contrary, if none of the three conditions is detected, the No. 2 storage battery continues to supply power.
When the No. 1 storage battery and the No. 2 storage battery are in the states of output disconnection and charging, if the logic control module 30 detects that the rectifier 21 is cleared of faults, the initial state is immediately recovered; otherwise, the No. 1 storage battery and the No. 2 storage battery are kept in the charging state continuously.
And when the No. 1 storage battery and the No. 2 storage battery are fully charged with electric energy, repeating the control process. Throughout the process, the initial state is restored as soon as the rectifier 21 is cleared.
Next, the charging failure control flow will be described in detail.
The charging faults include a charger fault, a charging high voltage fault, and a charging high current fault. The procedure for coping with a charging failure will be described with reference to the charger No. 1 and the secondary battery No. 1 as examples. In the initial state, the main or auxiliary switchboard supplies power to the dc device via rectifier 21, and relay KM in fig. 33Contact KM3The-1 is closed, the No. 1 charger charges the No. 1 storage battery, and the flow of the charger failure is shown in the figure 7.
When the fault of the charger No. 1 is detected, the charging of the storage battery No. 1 is stopped, and if the fault of the charger is not eliminated, the storage battery No. 1 is always in a charging stop state.
After the charger fault of the charger 1 is eliminated, if the condition 1 is detected: the charging voltage of battery No. 1 is higher than the safety threshold and lasts for X seconds (set as the case may be), or condition 2: the charging current of battery No. 1 is higher than the safety threshold and lasts for Y seconds (set according to the situation), relay K in fig. 413Power-off relay KM3Contact KM3And 1, disconnecting the input power supply of the No. 1 charger, and stopping charging the No. 1 storage battery.
And when the two conditions are not detected, the initial state is kept, and the charging of the storage battery is continued.
Next, the battery replacement mode control flow will be described in detail.
In the initial state, the main distribution board or the auxiliary distribution board supplies power to the dc device through the rectifier 21, the No. 1 battery and the No. 2 battery are both in the charging state, and the control flow when one of the batteries is replaced is shown in fig. 8.
Switch S in FIG. 41Switching to an ON state;
relay K in FIG. 413Relay K16Electrifying the relay KM in the figure 33Relay KM6Forced power-on, corresponding contact KM3-1～KM6-1 disconnection;
the input power supplies of the charger No. 1 and the charger No. 2 and the output ends of the storage battery No. 1 and the storage battery No. 2 are respectively cut off, so that any storage battery in the storage battery pack can be safely replaced without affecting the power supply of the rectifier 21 for the plurality of coupled direct-current devices.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A marine low-voltage DC power supply device based on autonomous management of a plurality of storage batteries, comprising: the control system comprises a logic control module (30), and an alternating current input module (10), a direct current output module (20) and a direct current bus (40) which are respectively connected with the logic control module (30); wherein,
the alternating current input module (10) comprises an alternating current input circuit (11) which is respectively connected with a main power supply and an emergency power supply, and a transformer bank (12) which is composed of a plurality of transformers connected in parallel;
the direct current output module (20) comprises a rectifier (21) connected to the alternating current input circuit (11), a charger group (22) connected with the transformer group (12) and composed of a plurality of chargers, and a storage battery group (23) connected with the charger group (22) and composed of a plurality of storage batteries, so that a plurality of auxiliary power supply circuits are formed in a configuration mode, and an isolation circuit is connected between every two adjacent auxiliary power supply circuits;
the rectifier (21) and a plurality of storage batteries in the storage battery pack (23) are respectively and independently connected into a direct current bus bar (40);
the logic control module (30) collects sampling signals of the alternating current input circuit (11), the rectifier (21), the charger group (22), the storage battery pack (23) and the direct current bus bar (40).
2. The marine low-voltage DC power supply device based on multiple storage batteries autonomous management of claim 1, characterized in that the charger is an intelligent AC/DC converter, and the charging phases of the storage batteries are switched according to the status information of each storage battery in the storage battery pack (23) by respectively adopting a constant-current voltage-limiting charging mode, a constant-voltage current-limiting charging mode and a trickle charging mode.
3. The marine low-voltage direct-current power supply apparatus based on multiple storage battery autonomous management of claim 1, characterized in that the isolation circuit is composed of two diodes connected in reverse.
4. The marine low-voltage direct-current power supply apparatus based on multiple battery autonomous management according to claim 1, characterized in that the logic control module (30) comprises: a microprocessor controller, a PIC processor, or a PLC controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720508646.XU CN206712539U (en) | 2017-05-09 | 2017-05-09 | A kind of marine low-pressure continuous-current plant based on the autonomous management of multiple batteries |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720508646.XU CN206712539U (en) | 2017-05-09 | 2017-05-09 | A kind of marine low-pressure continuous-current plant based on the autonomous management of multiple batteries |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193911A (en) * | 2018-09-21 | 2019-01-11 | 中船澄西船舶修造有限公司 | A kind of ship emergency escape guide lamp including same charged system |
| TWI692169B (en) * | 2018-08-17 | 2020-04-21 | 群光電能科技股份有限公司 | Charging apparatus and method of operating the same |
| CN111463887A (en) * | 2020-03-31 | 2020-07-28 | 华为技术有限公司 | Power supply system and method |
| CN111478424A (en) * | 2020-04-17 | 2020-07-31 | 上海外高桥造船有限公司 | Temporary emergency lighting feed system for ship |
-
2017
- 2017-05-09 CN CN201720508646.XU patent/CN206712539U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI692169B (en) * | 2018-08-17 | 2020-04-21 | 群光電能科技股份有限公司 | Charging apparatus and method of operating the same |
| CN109193911A (en) * | 2018-09-21 | 2019-01-11 | 中船澄西船舶修造有限公司 | A kind of ship emergency escape guide lamp including same charged system |
| CN111463887A (en) * | 2020-03-31 | 2020-07-28 | 华为技术有限公司 | Power supply system and method |
| CN111478424A (en) * | 2020-04-17 | 2020-07-31 | 上海外高桥造船有限公司 | Temporary emergency lighting feed system for ship |
| CN111478424B (en) * | 2020-04-17 | 2024-03-19 | 上海外高桥造船有限公司 | Temporary emergency lighting feed system for ship |
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