CN112838664B - High-voltage direct-current power supply device - Google Patents
High-voltage direct-current power supply device Download PDFInfo
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- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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Abstract
The invention provides a high-voltage direct-current power supply device which comprises a high-voltage alternating-current input module, a rectifying module, a backup power module, a switch and energy storage module, a control module, a direct-current power distribution module and an insulation detection module, wherein the switch and storage module comprises a redundant bridge circuit and an energy storage circuit, the redundant bridge circuit is also connected with the control module, a power supply circuit is switched when the power supply circuit of the rectifying module breaks down, and the backup power module supplies power to load equipment; the energy storage circuit is used for supplying power in the process of switching the power supply loop by the redundant bridging circuit and continuously storing energy after the switching of the power supply loop is completed. The invention can switch the power supply loop in time when the circuit of the rectifier module fails, the backup power module continues to supply power, and meanwhile, the energy storage circuit instantly discharges in the process of switching the power supply loop, thereby overcoming the technical defect that the power supply can not be continuously supplied in the switching process and greatly improving the reliability of the system.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a high-voltage direct-current power supply device.
Background
With the increasing development of data communication and internet services, the scale and the number of data rooms are more and more huge, the safety requirements of communication devices on power supplies of the communication devices are more and more strict, and the power consumption greatly exceeds the traditional services. The existing data machine rooms mostly adopt an UPS (uninterruptible power supply) system for alternating current power supply, and along with the large-scale use of the UPS system, the problems of low efficiency, high energy consumption, multiple fault points, parallel circulation and the like are gradually exposed in the aspects of operation, maintenance, redundancy parallel operation and the like.
Since the 90 s of the 20 th century, HVDC power supply systems, i.e., high voltage direct current power supply systems, have been studied and implemented in the united states, sweden, japan, and other countries. For example, chinese patent publication No. CN103701188A discloses a networked distributed high-voltage dc power supply system, which includes a plurality of ac power sources and a plurality of loads, and also includes a plurality of novel high-voltage dc power supply devices, a dc power grid, and a management control unit; the novel high-voltage direct-current power supply devices are respectively connected with the alternating-current power supplies and the loads; the novel high-voltage direct-current power supply devices are also connected with a direct-current power grid and a management control unit; the novel high-voltage direct-current power supply device is used for converting alternating current into direct current and supplying power to a load or a direct-current power grid; each novel high-voltage direct-current power supply device can work independently and only supplies power to a load connected with the novel high-voltage direct-current power supply device; each novel high-voltage direct-current power supply device can be connected with other novel high-voltage direct-current power supply devices through a direct-current power grid to work in a grid-connected mode while supplying power to a load connected with the novel high-voltage direct-current power supply device, and direct current is output to the direct-current power grid or input from the direct-current power grid; each novel high-voltage direct-current power supply device can be switched between an independent working state and a grid-connected working state according to instructions of the management control unit. For example, the invention patent with publication number CN103701111A discloses a distributed novel high-voltage direct-current power supply device, which includes an alternating-current power supply, and is characterized by further including a rectifier, a battery management module, a monitoring module, a direct-current power grid interface and a load interface, wherein the rectifier is connected with the alternating-current power supply, and is also connected with the monitoring module; the monitoring module is also connected with a direct current power grid interface and a load interface, and is also connected with a battery through a battery management module; the battery management module is responsible for controlling charging and discharging of a battery, the load interface is used for being connected with a load, the direct-current power grid interface is used for being connected with a direct-current power grid, and the rectifier is used for converting alternating current into direct current; the monitoring module is used for monitoring and managing the rectifier and the battery management module and can automatically adjust according to a preset power supply mode. However, the technical scheme cannot deal with the condition that the alternating current power supply fails, and the reliability of the system is greatly reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-voltage direct-current power supply device, which prolongs the service life of a storage battery and improves the reliability of a system.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
a high-voltage direct-current power supply device comprises a high-voltage alternating-current input module, a rectifying module, a backup power module, a switch, an energy storage module, a control module, a direct-current power distribution module and an insulation detection module, wherein the high-voltage alternating-current input module is connected with the rectifying module and the backup power module through a plurality of input interface modules, an input control switch and an input alternating-current bus, the input interface modules are detachably arranged to realize a multi-path input mode or a single-path input mode of the high-voltage alternating-current input module, a control end of the input control switch is connected with the control module, and the control module controls at least one alternating-current 380V high-voltage power to be supplied to the rectifying module or the backup power module through the input control switch and adjusts the input mode of the high-voltage alternating-current input module according to the control of load equipment; the rectifier module converts 380V alternating current high voltage into 240V direct current with nominal voltage, and the load equipment is supplied with power through the switch and storage module and the direct current distribution module; the output end of the backup power supply module is connected with the input end of the switch and reserve module, and 380V alternating current high voltage is converted into 240V nominal voltage direct current and stored; the switch and storage module comprises a redundant bridge circuit and an energy storage circuit connected with the output end of the redundant bridge circuit, the redundant bridge circuit is also connected with the control module, a power supply circuit is switched when the power supply circuit of the rectifier module fails, and the backup power module supplies power to the load equipment through the direct current power distribution module; the energy storage circuit is used for storing energy when the rectifier module supplies power, if a power supply loop of the rectifier module breaks down, the load equipment is supplied with power through the direct current power distribution module in the process of switching the power supply loop of the redundant bridge circuit, and the energy storage circuit continues to store energy after the switching of the power supply loop is completed; the direct current distribution module directly supplies power for load equipment, and insulating detection module one end is connected with the link of direct current distribution module and load equipment, and the other end is connected with control module, sends insulating detection data for control module, and control module acquires insulating detection data so that fortune dimension management and control.
Preferably, the rectifying module comprises an alternating current transformer, m parallel rectifying units connected with the alternating current transformer and a current-sharing control module connected with the rectifying units, the rectifying units and the current-sharing control module are connected with the control module, any rectifying unit comprises a rectifying screen, n parallel PWM rectifiers arranged in the rectifying screen, a power supply controller and a controllable switch arranged at the output end of the rectifying screen, the power supply controller is connected with the PWM rectifiers and the controllable switch respectively, and the output power of the rectifying units is controlled based on a PID algorithm; the current-sharing control module sets the average current of each rectifying unit
M current-sharing PID controllers are included in the average control process to averageThe current is taken as an input parameter, the output current of each rectifying unit is taken as a feedback parameter, x represents a certain rectifying unit, and then the output u of the current-sharing PID controller of the xth rectifying unitxIs ux＝k1x(iavg-ix)+k2xSix+k3xDixIn which S isixFor the integral of the error between the output current of the x-th rectifier unit and the average current, DixIs the differential of the error between the output current of the x-th rectifier unit and the average current, k1x、k2xAnd k3xThe proportional coefficient, the integral coefficient and the differential coefficient of the current-sharing PID controller are respectively.
Preferably, the output end of the rectifying module is connected with a first direct current bus, the first direct current bus is connected with the input end of the redundant bridge circuit, the output end of the backup power module is connected with a second direct current bus, the second direct current bus is connected with the input end of the redundant bridge circuit, the output end of the redundant bridge circuit is connected with a third direct current bus, the third direct current bus is respectively connected with the energy storage circuit and the direct current distribution module, the energy storage circuit comprises a current-limiting resistor, a bus capacitor and an electronic switch, the current-limiting resistor is connected with the bus capacitor in series, one end of the current-limiting resistor is connected with the third direct current bus, the other end of the bus capacitor is grounded, two ends of the current-limiting resistor are connected with an MOS switch tube in parallel, a control pin of the MOS switch tube is connected with the control module, the redundant bridge circuit is composed of a static direct current switch, if the control module detects that the voltage of the first direct current bus is smaller than a minimum preset value, the static direct current switch is controlled to switch the power supply loop, controlling the MOS switching tube to be switched off; and if the voltage of the first direct current bus is detected to exceed the maximum preset value, controlling the MOS switch tube to be conducted.
Preferably, the bus capacitor is a super capacitor.
Preferably, the direct current distribution module comprises l direct current distribution units connected in parallel, l is more than or equal to 2 and less than or equal to m, the rectifying units are connected with the direct current distribution units through segmented direct current buses, the segmented direct current buses are electrically isolated from each other, the power supply controller further comprises rectifying communication units, adjacent rectifying communication units are in communication connection, one rectifying communication unit of each rectifying unit is in communication connection with the control module, and the control module acquires communication and sampling data of other rectifying communication units through the rectifying communication units and transmits control signals to the other rectifying communication units through the rectifying communication units; the direct current distribution unit is divided into three types, namely load equipment and/or load equipment with good insulation, load equipment and/or load equipment with good insulation and load equipment with good insulation, wherein the load equipment and/or load equipment with good insulation are/is used for being connected with a positive pole ground short circuit loop, the negative pole ground short circuit loop, and the load equipment with good insulation is independently connected with the load equipment, the insulation detection module is used for obtaining the loop insulation condition of the load equipment and sending the loop insulation condition to the control module, and if the control module judges that the same direct current distribution unit is simultaneously connected with the load equipment with the positive pole ground short circuit loop and the load equipment with the negative pole ground short circuit loop, an alarm is sent and the direct current distribution unit is controlled to stop supplying power.
Preferably, the insulation detection module comprises insulation detection units in one-to-one correspondence with the direct current power distribution units, each insulation detection unit comprises a first insulation detection circuit for detecting positive and negative power supply bus voltages of the direct current power distribution units, a second insulation detection circuit for detecting positive and negative voltage values of load equipment connected with the direct current power distribution units, and an insulation detection unit controller, and the insulation detection unit controller is connected with the first insulation detection circuit and the second insulation detection circuit respectively, acquires insulation data of the direct current power distribution units and the load equipment, summarizes the insulation data and transmits the insulation data to the control module.
Preferably, the backup power module comprises a charging circuit, a storage battery and a battery inspection module, the input end of the charging circuit is connected with the input alternating current bus, the output end of the charging circuit charges the storage battery, and the battery inspection module is respectively connected with the storage battery and the control module to acquire parameters of the storage battery and provide the parameters for the control module.
Preferably, the storage battery comprises a plurality of battery units, the battery inspection module comprises a plurality of battery inspection units and a battery inspection host, the battery inspection host is in one-to-one correspondence with the battery units, parameter data of the battery units are acquired by the battery inspection host through the battery inspection units, the parameter data are sent to the control module after statistics and summary, the battery inspection unit acquires discharge current, discharge voltage, internal resistance and temperature of the battery units and sets the discharge current, the discharge voltage, the internal resistance and the temperature as first parameters, and self-discharge of the battery units is used as second parameters; the battery inspection module trains an initial FIS function based on a least square method and a back propagation gradient descent method, when the circuit of the rectifier module supplies power, the second parameter is used as a factor for acquiring the SOC data of the storage battery and training the ANFIS function, and when the circuit of the backup power supply module supplies power, the first parameter is used as a factor for acquiring the SOC data of the storage battery and training the ANFIS function.
Preferably, the battery inspection unit is connected through a CAN bus, the battery inspection unit packages the acquired parameter data of the battery unit, the unique identification code of the battery unit and the unique identification code of the battery unit, and transmits the packaged parameter data to the next battery inspection unit until the parameter data of all the battery units are transmitted to the battery inspection host, and the battery inspection host decrypts and restores the received data packet.
Preferably, the system also comprises a new energy power supply module, the new energy power supply module is connected with the switch and the energy storage module through the switch to supply power to the direct current power distribution module or directly supply power to the direct current power distribution module, and the new energy power supply module is connected with the control module and is controlled by the control module to control the on and off of the power supply.
The invention has the beneficial effects that: the backup power module is arranged as an emergency backup power supply of the system, the switch and the energy storage module can switch the power supply loop in time when the loop of the rectifier module breaks down, the backup power module continues to supply power, and meanwhile, in the process of switching the power supply loop, the energy storage circuit discharges instantly, so that the technical defect that power cannot be continuously supplied in the switching process is overcome, and the reliability of the system is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic block diagram of a high-voltage dc power supply apparatus provided by an embodiment of the present invention;
fig. 2 is a partial circuit schematic of a rectifier module.
In the figure, a 1-high-voltage alternating current input module, a 2-rectification module, a 3-backup power module, a 4-switch and energy storage module, a 5-control module, a 6-direct current distribution module and a 7-insulation detection module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Other embodiments, which can be derived by one of ordinary skill in the art from the embodiments given herein without any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example one
As shown in fig. 1, the present invention provides a high-voltage dc power supply apparatus, which includes a high-voltage ac input module 1, a rectification module 2, a backup power module 3, a switch and energy storage module 4, a control module 5, a dc distribution module 6, and an insulation detection module 7.
The high-voltage alternating current input module 1 is connected with the rectifying module 2 and the backup power module 3 through a plurality of input interface modules, an input control switch, an input alternating current bus and a single-path input mode or a plurality of input interface modules which are detachably arranged to realize the high-voltage alternating current input module 1, concretely, the input interface modules can be electric plugs, the electric plugs are connected with two power supply lines, one power supply line is connected with the rectifying module 2, the other power supply line is connected with the backup power module 3, the multi-path input mode of the high-voltage alternating current input module 1 can improve the power supply power of the direct current distribution module 6, the input interface modules are connected with different 380V high-voltage buses, the fault of one 380V high-voltage bus or the fault of a power supply socket is prevented, and therefore the reliability of the system can be improved. The input control switch is arranged between the output end of the input interface module and the input end of the rectifier module 2, the control end of the input control switch is connected with the control module 5, the control module 5 controls at least one alternating current 380V high-voltage power supply rectifier module 2 or the backup power supply module 3 through the input control switch and adjusts the input mode of the high-voltage alternating current input module 1 according to the control of load equipment, if the power required by the load equipment is high, the control module 5 controls the high-voltage alternating current input module 1 to adopt a multi-path input mode, and if the power required by the load equipment is low, the control module 5 controls the high-voltage alternating current input module 1 to adopt a single-path input mode.
The rectifier module 2 converts 380V alternating current high voltage into 240V direct current with nominal voltage, and supplies power to load equipment through the switch and storage module and the direct current distribution module 6; the output end of the backup power module 3 is connected with the input end of the switch and reserve module, and 380V alternating current high voltage is converted into 240V nominal voltage direct current and stored; the switch and storage module comprises a redundant bridge circuit and an energy storage circuit connected with the output end of the redundant bridge circuit, the redundant bridge circuit is also connected with the control module 5, a power supply circuit is switched when the power supply circuit of the rectifier module 2 fails, and the backup power module 3 supplies power to load equipment through the direct current power distribution module 6; the energy storage circuit is used for storing energy when the rectifier module 2 supplies power, if a power supply loop of the rectifier module 2 breaks down, the power is supplied to the load equipment through the direct current distribution module 6 in the process of switching the power supply loop of the redundant bridge circuit, and the energy storage is continued after the switching of the power supply loop is completed; direct current distribution module 6 directly supplies power for load equipment, and insulating detection module 7 one end is connected with direct current distribution module 6 and load equipment's link, and the other end is connected with control module 5, sends insulating detection data for control module 5, and control module 5 acquires insulating detection data so that fortune dimension management and control. The invention can provide uninterrupted power supply for IT communication equipment, exchange equipment, computer instrument control devices, lighting equipment and the like.
Example two
As shown in fig. 2, as a preferred embodiment of the present invention, the rectification module 2 includes an ac transformer, m parallel rectification units connected to the ac transformer, and a current-sharing control module connected to the rectification units, where the rectification units and the current-sharing control module are both connected to the control module 5, each rectification unit includes a rectification screen, n parallel PWM rectifiers disposed in the rectification screen, a power supply controller, and a controllable switch disposed at an output end of the rectification screen, the power supply controller is connected to the PWM rectifier and the controllable switch, respectively, and controls output power of the rectification unit based on a PID algorithm; the current-sharing control module sets the average current of each rectifying unit
M current-sharing PID controllers are included in the average control process, m is a positive integer, the average current is used as an input parameter, the output current of each rectifying unit is used as a feedback parameter, x represents a certain rectifying unit, and then the output u of the current-sharing PID controller of the xth rectifying unitxIs ux＝k1x(iavg-ix)+k2xSix+k3xDixIn which S isixFor the integral of the error between the output current of the x-th rectifier unit and the average current, DixIs the differential of the error between the output current of the x-th rectifier unit and the average current, k1x、k2xAnd k3xThe proportional coefficient, the integral coefficient and the differential coefficient of the current-sharing PID controller are respectively. Therefore, the invention can realize accurate current sharing control in the power supply process, and realize the accurate current sharing control in sudden load addition, sudden load unloading, parallel connection input, parallel connection exit and parallel connectionIn the dynamic process of connection and the like, the stability of the output voltage of the direct current power distribution module 6 can be kept, good current sharing control is realized, and finally the reliability of the invention is realized.
EXAMPLE III
On the basis of the second embodiment, the output end of the rectifying module 2 is connected with a first direct current bus, the first direct current bus is connected with the input end of the redundant bridge circuit, the output end of the backup power module 3 is connected with a second direct current bus, the second direct current bus is connected with the input end of the redundant bridge circuit, the output end of the redundant bridge circuit is connected with a third direct current bus, the third direct current bus is respectively connected with the energy storage circuit and the direct current distribution module 6, the energy storage circuit comprises a current-limiting resistor, a bus capacitor and an electronic switch, the current-limiting resistor is connected with the bus capacitor in series, one end of the current-limiting resistor is connected with the third direct current bus, the other end of the bus capacitor is grounded, the two ends of the current-limiting resistor are connected with an MOS switch tube in parallel, a control pin of the MOS switch tube is connected with the control module 5, the redundant bridge circuit is formed by a static direct current switch, if the control module 5 detects that the voltage of the first direct current bus is smaller than the minimum preset value, controlling the static direct current switch to switch a power supply loop and controlling the MOS switch tube to be switched off; and if the voltage of the first direct current bus is detected to exceed the maximum preset value, controlling the MOS switch tube to be conducted. The invention can reduce the input impact current during power-on and power-off and improve the working reliability of the system. The static direct current switch can be formed by a thyristor SCR (silicon controlled rectifier), the complexity degree based on the direct current static switch is far smaller than that of a static switch of a UPS (uninterrupted power supply) system, and meanwhile, the high-voltage direct current power supply system does not have the requirement of system synchronization, so that very high low-voltage monitoring and judgment and switch switching response speed can be achieved. Specifically, the bus capacitor is a super capacitor.
Example four
On the basis of the second embodiment, the direct current distribution module 6 comprises l direct current distribution units connected in parallel, l is more than or equal to 2 and less than or equal to m, l is a positive integer, the rectifying units are connected with the direct current distribution units through segmented direct current buses, the segmented direct current buses are mutually electrically isolated, the power supply controller further comprises rectifying communication units, adjacent rectifying communication units are in communication connection, one rectifying communication unit of the rectifying units is in communication connection with the control module 5, and the control module 5 acquires communication and sampling data of other rectifying communication units through the rectifying communication units and transmits control signals to the other rectifying communication units through the rectifying communication units; the direct current distribution unit is divided into three types, namely load equipment and/or load equipment with good insulation, load equipment and/or load equipment with good insulation and load equipment with good insulation, wherein the load equipment and/or load equipment with good insulation are/is used for being connected with a positive pole ground short circuit loop, the negative pole ground short circuit loop, and the load equipment with good insulation is independently connected with the negative pole ground short circuit loop, the insulation detection module 7 is used for obtaining the loop insulation condition of the load equipment and sending the loop insulation condition to the control module 5, and if the control module 5 judges that the same direct current distribution unit is simultaneously connected with the load equipment with the positive pole ground short circuit loop and the load equipment with the negative pole ground short circuit loop, an alarm is sent and the direct current distribution unit is controlled to stop supplying power.
In addition, the insulation detection module 7 can be integrated into a built-in monitoring module of the high-voltage direct-current power supply system, namely, a combined control method of an embedded software and an upper management control system is adopted in the control module 5 of the high-voltage direct-current power supply system equipment to carry out insulation detection on the high-voltage direct-current power supply system, so that the use problems of complex insulation detection wiring construction, poor reliability, inaccurate fault point positioning and the like are solved.
On the basis of the above embodiment, the insulation detection module 7 includes insulation detection units corresponding to the dc power distribution units one to one, each insulation detection unit includes a first insulation detection circuit for detecting positive and negative power supply bus voltages of the dc power distribution units, a second insulation detection circuit for detecting positive and negative voltage values of load devices connected to the dc power distribution units, and an insulation detection unit controller, and the insulation detection unit controller is connected to the first insulation detection circuit and the second insulation detection circuit, respectively, and acquires insulation data of the dc power distribution units and the load devices, and transmits the insulation data to the control module 5 in a summary manner. The first insulation detection circuit is used for detecting the voltage of the positive and negative power supply buses of the direct current distribution unit and specifically comprises the following steps:
judging whether one of the positive power supply bus voltage and the negative power supply bus voltage of the direct current distribution unit changes, if so, performing resistance calculation by adopting a balanced bridge method, and if the resistance value of the calculated resistance is less than or equal to a preset insulation threshold value, sending an insulation alarm;
and judging whether the voltages of the positive power supply bus and the negative power supply bus of the direct current distribution unit change simultaneously, if so, performing resistance calculation by adopting an unbalanced bridge method, and if the calculated resistance value is less than or equal to a preset insulation threshold value, sending an insulation alarm.
EXAMPLE five
As a preferred embodiment of the present invention, the backup power module 3 includes a charging circuit, a storage battery, and a battery inspection module, wherein an input end of the charging circuit is connected to the input ac bus, an output end of the charging circuit charges the storage battery, after the storage battery is charged, the charging circuit stops charging the storage battery, the charging circuit is connectable to the control module 5, the control module 5 controls whether the charging circuit works, and the battery inspection module is respectively connected to the storage battery and the control module 5 to obtain parameters of the storage battery and send the parameters to the control module 5.
Specifically, the storage battery comprises a plurality of battery units, the battery inspection module comprises a plurality of battery inspection units and a battery inspection host, the battery inspection host is in one-to-one correspondence with the battery units, parameter data of the battery units are acquired by the battery inspection host through the battery inspection units, the parameter data are sent to the control module 5 after statistics and summary, the battery inspection unit acquires discharge current, discharge voltage, internal resistance and temperature of the battery units and sets the discharge current, the discharge voltage, the internal resistance and the temperature as first parameters, and self-discharge of the battery units is used as second parameters; the battery inspection module trains an initial FIS function based on a least square method and a back propagation gradient descent method, when the rectifying module 2 supplies power to the loop, the second parameter is used as a factor for acquiring the SOC data of the storage battery and training the ANFIS function, and when the backup power module 3 supplies power to the loop, the first parameter is used as a factor for acquiring the SOC data of the storage battery and training the ANFIS function.
When the rectifier module circuit is powered, the second parameter is used as a factor for acquiring the SOC data of the storage battery and training an ANFIS function, and the first ANFIS function is expressed as
[FIS,ERROR,STEPSIZE,CHKFIS,CHKERROR]＝anfis
(TRNDATA,INIIFIS,TRNOPT,CHKDATA)
The left side of the function equation is output data of the function, wherein FIS is a final model output after the function is trained, and ERROR is a root mean square matrix of a training ERROR of each step; STEPSIZE is a training step size matrix, and the increase or decrease of the step size is adjusted in the training process; CHKFIS is the fuzzy system when the error of the inspection data reaches the minimum value, and CHKERROR is the root mean square matrix of the error of the inspection data.
The right side of the function equation is input parameters and training options, TRNDATA represents training data, that is, self-discharge of the battery unit and SOC of the battery unit, inifis is initial FIS, TRNOPT is training times, training target error, initial step size, step size reduction rate, and step size increase rate, and CHKDATA is inspection data.
When the backup power supply module loop supplies power, the first parameter is used as a factor for acquiring the SOC data of the storage battery and training an ANFIS function, the SOC of the battery unit output by the first ANFIS function is adjusted and corrected to improve the SOC prediction accuracy of the storage battery, and the second ANFIS function is expressed as
[FIS,ERROR,STEPSIZE,CHKFIS,CHKERROR]＝anfis(TRNDATA,INIIFIS,TRNOPT,CHKDATA)
The left side of the function equation is output data of the function, wherein FIS is a final model output after the function is trained, and ERROR is a root mean square matrix of a training ERROR of each step; STEPSIZE is a training step size matrix, and the increase or decrease of the step size is adjusted in the training process; CHKFIS is the fuzzy system when the error of the inspection data reaches the minimum value, and CHKERROR is the root mean square matrix of the error of the inspection data.
The right side of the function equation is input parameters and training options, TRNDATA represents training data, namely discharge current, discharge voltage, internal resistance and temperature of the battery unit and SOC of the battery unit, inifis is initial FIS, TRNOPT is training times, training target error, initial step size, step size reduction rate and step size increase rate, and CHKDATA is inspection data.
The technical scheme can further improve the system reliability of the invention, and is convenient for early warning and operation and maintenance.
In other embodiments, the battery inspection unit may be connected via a CAN bus, the battery inspection unit packages the acquired parameter data of the battery unit, the unique identification code of the battery unit, and transmits the packaged parameter data to the next battery inspection unit until all the parameter data of the battery units are transmitted to the battery inspection host, and the battery inspection host decrypts and restores the received data packet.
In summary, in order to improve the reliability of the novel high-voltage dc power supply device, the invention expands and describes each component of the novel high-voltage dc power supply device in detail, and with the wide-range use of the data center, the machine room, the IT communication equipment, the exchange equipment, and the computer instrument control device and the higher requirement on the power supply safety, IT is necessary to improve the reliability of the novel high-voltage dc power supply device by implementing at least one of the above embodiments so as to protect the data safety of the data center, the machine room, the IT communication equipment, the exchange equipment, and the computer instrument control device.
The embodiment mainly uses 380V high-voltage electricity as an alternating current input source for detailed explanation, and new energy sources except electric energy, such as solar energy and wind energy, have well-known strategic meanings, so that solar energy is ubiquitous, inexhaustible and clean and environment-friendly; the new energy power supply module in the following embodiments specifically refers to new energy except for electric energy, such as a photovoltaic power supply device.
EXAMPLE six
As a preferred embodiment of the present invention, the power supply system further includes a new energy power supply module, the new energy power supply module is connected to the switch and the energy storage module 4 through the switch to supply power to the dc power distribution module 6 or directly supply power to the dc power distribution module 6, the new energy power supply module is connected to the control module 5, and the control module 5 controls on and off of the power supply.
The invention has the beneficial effects that: the backup power module 3 is arranged as an emergency backup power supply of the system, the switch and energy storage module 4 can switch the power supply loop in time when the loop of the rectifier module 2 fails, the backup power module 3 continues to supply power, and meanwhile, in the process of switching the power supply loop, the energy storage circuit discharges instantly, so that the technical defect that the power cannot be supplied continuously in the switching process is overcome, and the reliability of the system is greatly improved.
In light of the foregoing description of the preferred embodiments of the present invention, those skilled in the art can now make various alterations and modifications without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A high-voltage direct-current power supply device is characterized by comprising a high-voltage alternating-current input module, a rectifying module, a backup power module, a switch, an energy storage module, a control module, a direct-current distribution module and an insulation detection module, wherein the high-voltage alternating-current input module is connected with the rectifying module and the backup power module through a plurality of input interface modules, an input control switch and an input alternating-current bus, the input interface modules can be detachably arranged to realize a multi-path input mode or a single-path input mode of the high-voltage alternating-current input module, the control end of the input control switch is connected with the control module, the control module controls at least one alternating-current 380V high-voltage power supply to the rectifying module or the backup power module through the input control switch and adjusts the input mode of the high-voltage alternating-current input module according to the control of load equipment; the rectifier module converts 380V alternating current high voltage into 240V direct current with nominal voltage, and the load equipment is supplied with power through the switch and storage module and the direct current distribution module; the output end of the backup power supply module is connected with the input end of the switch and reserve module, and 380V alternating current high voltage is converted into 240V nominal voltage direct current and stored; the switch and storage module comprises a redundant bridge circuit and an energy storage circuit connected with the output end of the redundant bridge circuit, the redundant bridge circuit is also connected with the control module, a power supply circuit is switched when the power supply circuit of the rectifier module fails, and the backup power module supplies power to the load equipment through the direct current power distribution module; the energy storage circuit is used for storing energy when the rectifier module supplies power, if a power supply loop of the rectifier module breaks down, the load equipment is supplied with power through the direct current power distribution module in the process of switching the power supply loop of the redundant bridge circuit, and the energy storage circuit continues to store energy after the switching of the power supply loop is completed; the direct current distribution module directly supplies power for load equipment, and insulating detection module one end is connected with the link of direct current distribution module and load equipment, and the other end is connected with control module, sends insulating detection data for control module, and control module acquires insulating detection data so that fortune dimension management and control.
2. The high-voltage direct current power supply device according to claim 1, characterized in that the rectification module comprises an alternating current transformer, m parallel rectification units connected with the alternating current transformer, and a current-sharing control module connected with the rectification units, the rectification units and the current-sharing control module are both connected with the control module, any rectification unit comprises a rectification screen, n parallel PWM rectifiers arranged in the rectification screen, a power supply controller, and a controllable switch arranged at the output end of the rectification screen, the power supply controller is connected with the PWM rectifiers and the controllable switch respectively, and controls the output power of the rectification units based on a PID algorithm; the current-sharing control module sets the average current of each rectifying unit
M current-sharing PID controllers are included in the average control process, the average current is used as an input parameter, the output current of each rectifying unit is used as a feedback parameter, x represents a certain rectifying unit, and then the output u of the current-sharing PID controller of the x-th rectifying unitxIs ux＝k1x(iavg-ix)+k2xSix+k3xDixIn which S isixFor the integral of the error between the output current of the x-th rectifier unit and the average current, DixIs the differential of the error between the output current of the x-th rectifier unit and the average current, k1x、k2xAnd k3xThe proportional coefficient, the integral coefficient and the differential coefficient of the current-sharing PID controller are respectively.
3. The high-voltage direct-current power supply device according to claim 2, wherein the output end of the rectifying module is connected to a first direct-current bus, the first direct-current bus is connected to the input end of the redundant bridge circuit, the output end of the backup power module is connected to a second direct-current bus, the second direct-current bus is connected to the input end of the redundant bridge circuit, the output end of the redundant bridge circuit is connected to a third direct-current bus, the third direct-current bus is respectively connected to the energy storage circuit and the direct-current distribution module, the energy storage circuit comprises a current-limiting resistor, a bus capacitor and an electronic switch, the current-limiting resistor is connected in series with the bus capacitor, one end of the current-limiting resistor is connected to the third direct-current bus, the other end of the bus capacitor is grounded, the two ends of the current-limiting resistor are connected in parallel with MOS switch tubes, the control pins of the MOS switch tubes are connected to the control module, the redundant bridge circuit is composed of static direct-current switches, if the control module detects that the voltage of the first direct-current bus is smaller than a preset value, controlling the static direct current switch to switch a power supply loop and controlling the MOS switch tube to be switched off; and if the voltage of the first direct current bus is detected to exceed the maximum preset value, controlling the MOS switch tube to be conducted.
4. A high voltage direct current electric power supply unit according to claim 3, characterised in that the bus capacitor is a super capacitor.
5. The high-voltage direct-current power supply device according to claim 2, characterized in that the direct-current power distribution module comprises l parallel direct-current power distribution units, l is more than or equal to 2 and less than or equal to m, the rectifying units are connected with the direct-current power distribution units through segmented direct-current buses, the segmented direct-current buses are electrically isolated from each other, the power supply controller further comprises rectifying communication units, adjacent rectifying communication units are in communication connection, one rectifying communication unit of the rectifying units is in communication connection with the control module, and the control module acquires communication and sampling data of other rectifying communication units through the rectifying communication units and transmits control signals to the other rectifying communication units through the rectifying communication units; the direct current distribution unit is divided into three types, namely load equipment and/or load equipment with good insulation, load equipment and/or load equipment with good insulation and load equipment with good insulation, wherein the load equipment and/or load equipment with good insulation are/is used for being connected with a positive pole ground short circuit loop, the negative pole ground short circuit loop, and the load equipment with good insulation is independently connected with the load equipment, the insulation detection module is used for obtaining the loop insulation condition of the load equipment and sending the loop insulation condition to the control module, and if the control module judges that the same direct current distribution unit is simultaneously connected with the load equipment with the positive pole ground short circuit loop and the load equipment with the negative pole ground short circuit loop, an alarm is sent and the direct current distribution unit is controlled to stop supplying power.
6. The HVDC power supply device of claim 5, wherein the insulation detection module comprises insulation detection units corresponding to the DC power distribution units one to one, each insulation detection unit comprises a first insulation detection circuit for detecting the voltages of the positive and negative power supply buses of the DC power distribution unit, a second insulation detection circuit for detecting the voltage values of the positive and negative poles of the load device connected with the DC power distribution unit, and an insulation detection unit controller, the insulation detection unit controller is connected with the first insulation detection circuit and the second insulation detection circuit respectively, and acquires insulation data of the DC power distribution unit and the load device and summarizes the data and transmits the data to the control module.
7. The high-voltage direct current power supply device according to claim 1, characterized in that the backup power module comprises a charging circuit, a storage battery and a battery inspection module, wherein an input end of the charging circuit is connected with the input alternating current bus, an output end of the charging circuit charges the storage battery, and the battery inspection module is respectively connected with the storage battery and the control module to acquire parameters of the storage battery and send the parameters to the control module.
8. The high-voltage direct current power supply device according to claim 7, characterized in that the storage battery comprises a plurality of battery units, the battery inspection module comprises a plurality of battery inspection units and a battery inspection host which are in one-to-one correspondence with the battery units, the battery inspection host acquires parameter data of the battery units through the battery inspection units, the parameter data are sent to the control module after statistics and summary, the battery inspection units acquire discharge current, discharge voltage, internal resistance and temperature of the battery units and set the discharge current, discharge voltage, internal resistance and temperature as first parameters, and self-discharge of the battery units is taken as second parameters; the battery inspection module trains an initial FIS function based on a least square method and a back propagation gradient descent method, when the circuit of the rectifier module supplies power, the second parameter is used as a factor for acquiring the SOC data of the storage battery and training the ANFIS function, and when the circuit of the backup power supply module supplies power, the first parameter is used as a factor for acquiring the SOC data of the storage battery and training the ANFIS function.
9. The high-voltage direct-current power supply device according to claim 8, wherein the battery inspection unit is connected through a CAN bus, the battery inspection unit packages the acquired parameter data of the battery unit, the unique identification code of the battery unit and the unique identification code of the battery unit, and transmits the packaged parameter data to the next battery inspection unit until all the parameter data of the battery units are transmitted to the battery inspection host, and the battery inspection host decrypts and restores the received data packets.
10. The high-voltage direct-current power supply device according to claim 1, further comprising a new energy power supply module, wherein the new energy power supply module is connected to the switch and the energy storage module through the switch to supply power to the direct-current power distribution module or directly supply power to the direct-current power distribution module, the new energy power supply module is connected with the control module, and the control module controls on and off of the power supply.
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