CN115528801A - Power dynamic monitoring system - Google Patents
Power dynamic monitoring system Download PDFInfo
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- CN115528801A CN115528801A CN202211496164.9A CN202211496164A CN115528801A CN 115528801 A CN115528801 A CN 115528801A CN 202211496164 A CN202211496164 A CN 202211496164A CN 115528801 A CN115528801 A CN 115528801A
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- battery box
- operational amplifier
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/36—Arrangements using end-cell switching
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The invention discloses a power supply dynamic monitoring system, which comprises a main battery box, a standby battery box, a selection switch circuit and a monitoring control circuit, wherein the main battery box is used for supplying power to a server when commercial power alternating current is cut off; the standby battery box is used for supplying power to the server when the commercial power alternating current is cut off and the main battery box is in failure; the selection switch circuit is used for carrying out power supply selection control on the main battery box and the standby battery box; the monitoring control is used for detecting a lightning signal of a circuit power line and switching a power supply to the main battery box when the power line generates the lightning signal; and switching the power supply to the backup battery box when the main battery box has a fault. Therefore, the influence of the lightning signals on the power supply of the server can be reduced, and the server is prevented from being damaged by the lightning signals through the power line. In addition, when the main battery box breaks down, the standby battery box is switched to a power supply of the server, and the power supply stability of the server is guaranteed.
Description
Technical Field
The invention relates to the technical field of power supply of a server room, in particular to a dynamic power supply monitoring system.
Background
In the power supply of the computer room, the stability of the power supply is very important, and the unstable power supply may cause the server to stop service due to the power supply problem. In severe cases, it may even lead to a breakdown of the entire server, and thus a corresponding online service cannot be provided.
The existing server is mainly powered by mains supply alternating current, and as the alternating current is relatively greatly influenced by lightning signals, under the severe weather conditions such as lightning and the like, the lightning signals need to be prevented from being conducted to the server through a power line as far as possible, so that the server is prevented from being damaged correspondingly. In order to further ensure stable power supply of the servers, a battery box is usually provided for each server, so that when the commercial power alternating current cannot be supplied normally, the battery box is used for continuously supplying power to each server. As the battery box may age and malfunction during use. Thus, if the replacement of the backup battery is performed without timely detecting the state of the battery box, there is a possibility that the server may be out of service due to a failure of the battery box.
Disclosure of Invention
The present invention is intended to approach, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to provide a dynamic power monitoring system.
In order to achieve the above object, an embodiment of the present invention provides a power dynamic monitoring system, including:
the main battery box is used for supplying power to the server when the commercial power alternating current is cut off;
the standby battery box is used for supplying power to the server when the mains supply alternating current is cut off and the main battery box fails;
the main battery box and the standby battery box are respectively connected with the server through the selection switch circuit so as to selectively control the power supply of the main battery box and the standby battery box;
the monitoring control circuit is respectively connected with the power line, the main battery box and the selection switch circuit so as to detect a lightning signal of the power line and switch the power supply to the main battery box when the lightning signal appears on the power line; and when detecting that the main battery box has a fault, switching the power supply to the standby battery box through the selection switch circuit.
Further, according to an embodiment of the present invention, the monitoring control circuit includes:
the lightning signal monitoring circuit is used for monitoring a lightning signal on a power line;
the battery monitoring circuit is used for monitoring the state of the main battery box;
the control circuit is respectively connected with the lightning signal monitoring circuit and the battery monitoring circuit so as to switch a power supply to the main battery box when a lightning signal appears on a power line; and when detecting that the main battery box has a fault, switching the power supply to the standby battery box through the selection switch circuit.
Further, in accordance with an embodiment of the present invention, the lightning signal monitoring circuit includes:
a lightning signal release circuit for releasing a lightning signal, the lightning signal release circuit including a first varistor RX1 and a second varistor RX2, one end of the first varistor RX1 being connected to a first power line, one end of the second varistor RX2 being connected to a second power line, and the other ends of the first and second varistors RX1 and RX2 being connected to a reference ground, respectively;
the coupling circuit is used for coupling and outputting the residual lightning signals and comprises a coupling transformer T1, and a primary coil of the coupling transformer T1 is respectively connected with the first power line and the second circuit line;
and the detection circuit is connected with the secondary coil of the coupling transformer T1, wherein one end of the secondary coil of the coupling transformer T1 is connected with the input end of the detection circuit, and the other end of the secondary coil of the coupling transformer T1 is connected with a reference ground.
Further, in accordance with an embodiment of the present invention, the lightning signal monitoring circuit further includes: the clamping circuit comprises a voltage stabilizing diode D1 and a voltage stabilizing diode D2, the anode of the voltage stabilizing diode D1 is connected with a power supply VCC, the cathode of the voltage stabilizing diode D1 is connected with the other end of the secondary coil of the coupling transformer T1, the cathode of the voltage stabilizing diode D2 is connected with the other end of the secondary coil of the coupling transformer T1, and the anode of the voltage stabilizing diode D2 is connected with a reference ground.
Further, according to an embodiment of the present invention, the detector circuit includes:
a capacitor C1, one end of the capacitor C1 being connected to the one end of the secondary coil of the coupling transformer T1;
one end of the capacitor C2 is connected with the other end of the capacitor C1;
one end of the resistor R6 is connected with the common end of the capacitor C2 and the capacitor C1;
a resistor R7, one end of the resistor R7 being connected to the one end of the capacitor C1;
one end of the resistor R8 is connected with the other end of the resistor R7, and the other end of the resistor R8 is connected with the other end of the capacitor C2;
one end of the capacitor C3 is connected with the other end of the resistor R6, and the other end of the capacitor C3 is connected with the common end of the resistor R7 and the resistor R8;
the non-inverting input end of the integrated operational amplifier U1 is connected with the other end of the capacitor C2, the inverting input end of the integrated operational amplifier U1 is connected with the output end, the output end of the integrated operational amplifier U1 is also connected with one end of a resistor R1, the other end of the resistor R1 is connected with one end of a resistor R2, and the other end of the resistor R2 is connected with a reference ground;
the positive phase input end of the integrated operational amplifier U2 is connected with the one end of the resistor R2, the negative phase input end of the integrated operational amplifier U2 is connected with the output end, and the output end of the integrated operational amplifier U2 is connected with the common end of the resistor R6 and the capacitor C3;
and the input end of the envelope detector U3 is connected with the integrated operational amplifier U1, and the output end of the envelope detector U3 is connected with the control circuit.
Further, according to an embodiment of the present invention, the detection circuit further includes a dc filter circuit, an input terminal of the envelope detector U3 is connected to an input terminal of the integrated operational amplifier U1 through the dc filter circuit, and the dc filter circuit includes:
one end of the capacitor C7 is connected with the input end of the envelope detector U3;
one end of the resistor R3 is connected with the other end of the capacitor C7, and the other end of the resistor R3 is connected with the output end of the integrated operational amplifier U1;
one end of the resistor R4 is connected with the other end of the resistor R3, and the other end of the resistor R4 is connected with a reference ground;
and one end of the resistor R5 is connected with the one end of the resistor R3, and the other end of the resistor R5 is connected with a reference ground.
Further, according to an embodiment of the present invention, the battery monitoring circuit includes:
the primary side coil L1 is connected in series with a power supply line of the main battery box;
the Hall detector U2 is used for detecting the current of the primary coil L1;
the positive phase input end of the integrated operational amplifier U4 is connected with the positive output end of the main battery box through a resistor R9 and a resistor R10, the negative phase input end of the integrated operational amplifier U4 is connected with a reference ground through a resistor R12, the negative phase input end of the integrated operational amplifier U4 is further connected with the output end of the integrated operational amplifier U4 through a resistor R11, and the output end of the integrated operational amplifier U4 is connected with the voltage detection end of the control circuit;
the non-inverting input end of the integrated operational amplifier U5 is connected with one output end of the Hall detector U8 through a resistor R13, and the inverting input end of the integrated operational amplifier U5 is connected with the output end of the integrated operational amplifier U5 through a resistor R14;
the non-inverting input end of the integrated operational amplifier U6 is connected with the other output end of the Hall detector U8 through a resistor R19, the inverting input end of the integrated operational amplifier U6 is connected with the inverting input end of the integrated operational amplifier U5 through a resistor R15, and the inverting input end of the integrated operational amplifier U6 is also connected with the output end of the integrated operational amplifier U6 through a resistor R16;
the current detection circuit comprises an integrated operational amplifier U7, wherein a positive phase input end of the integrated operational amplifier U7 is connected with an output end of the integrated operational amplifier U6 through a resistor R17, a positive phase input end of the integrated operational amplifier U7 is further connected with a reference ground through a resistor R18, an inverting input end of the integrated operational amplifier U18 is connected with an output end of the integrated operational amplifier U5 through a resistor R20, an inverting input end of the integrated operational amplifier U18 is further connected with an output end of the integrated operational amplifier U7 through a resistor R21, and an output end of the integrated operational amplifier U7 is further connected with a current detection end of the control circuit through a resistor R22.
Further, according to an embodiment of the present invention, the battery monitoring circuit further includes:
the primary coil L1 is connected with the positive output end of the main battery box through the diode D3, wherein the anode of the diode D3 is connected with the positive output end of the main battery box, and the cathode of the diode D3 is connected with the primary coil L1;
the positive phase input end of the integrated operational amplifier U4 is connected with the positive output end of the main battery box through a resistor R9, a resistor R10 and a diode D4, wherein the anode of the diode D4 is connected with the main battery box, and the cathode of the diode D4 is connected with the positive phase input end of the integrated operational amplifier U4 through the resistor R9 and the resistor R10;
and one end of the capacitor C8 is connected with the common end of the resistor R9 and the resistor R10, and the other end of the capacitor C8 is connected with the reference ground.
Further, according to an embodiment of the present invention, the control circuit includes a controller and a relay switch circuit, the controller being connected to the relay switch circuit, the relay switch circuit including:
a first end of a channel of the relay K1 is connected with a power line, and a second end of the channel of the relay K1 outputs alternating current to charge the main battery box and/or the standby battery box;
a collector of the triode Q1 is connected with a first controlled end of the relay K1, a second controlled end of the relay K1 is connected with a power supply, an emitter of the triode Q1 is connected with a reference ground, and a base of the triode Q1 is also connected with a control end of the control circuit through a resistor R23;
the anode of the diode D1 is connected with the first controlled end of the relay K1, and the cathode of the diode D1 is connected with the second controlled end of the relay K1.
Further, according to an embodiment of the present invention, the power supply dynamic monitoring system further includes:
and the input end of the AC-DC conversion circuit is connected with the second end of the channel of the relay K1, and the output end of the AC-DC conversion circuit is connected with the main battery box, and charges the main battery box and/or the standby battery box and/or supplies power to the server after voltage conversion.
The power supply dynamic monitoring system provided by the embodiment of the invention is used for supplying power to the server when the commercial power alternating current is cut off through the main battery box; the standby battery box is used for supplying power to the server when the alternating current of the mains supply is cut off and the main battery box fails; the main battery box and the standby battery box are respectively connected with the server through the selection switch circuit so as to selectively control the power supply of the main battery box and the standby battery box; the monitoring control circuit is respectively connected with the power line, the main battery box and the selection switch circuit so as to detect a lightning signal of the power line and switch the power supply to the main battery box when the lightning signal appears on the power line; and when detecting that the main battery box has a fault, switching the power supply to the standby battery box through the selection switch circuit. Therefore, the influence of the lightning signals on the power supply of the server can be reduced, and the server is prevented from being damaged by the lightning signals through the power line. In addition, when the main battery box breaks down, the standby battery box is switched to a power supply of the server, so that the power supply stability of the server is ensured, and the condition that the server cannot work normally due to power supply failure is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a dynamic power monitoring system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a connection structure between a detection circuit and a main battery box according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a relay switch circuit according to an embodiment of the present invention.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1 to 3, an embodiment of the invention provides a power dynamic monitoring system, including: the main battery box is used for supplying power to the server when commercial power alternating current is cut off; the standby battery box is used for supplying power to the server when the mains supply alternating current is cut off and the main battery box fails; as shown in fig. 1, under the control of the monitoring control circuit, the power supply is selectively output through the main battery box and the backup battery box, so as to ensure that the server can be supplied with power through the main battery box even in the case of a power failure of the mains supply alternating current. In some cases, the main battery box may have a fault, and at this time, the standby battery box may also continue to provide a power supply for the server, so as to avoid the problem that the server cannot provide online service due to power interruption.
The main battery box and the standby battery box are respectively connected with the server through the selection switch circuit so as to selectively control power supply of the main battery box and the standby battery box; as shown in fig. 1, the selection switch circuit is provided between the main battery box, the auxiliary battery box, and the server, and the power supply channels can be switched by the selection switch. For example, normally, when the power line stops supplying power, the server is supplied with power through the main battery box, and the auxiliary battery box is in an off state. When the main battery box breaks down, the selection switch cuts off a power supply channel of the main battery box, and the standby battery box is selected to continue to supply power for the server.
The monitoring control circuit is respectively connected with the power line, the main battery box and the selection switch circuit so as to detect a lightning signal of the power line and switch the power supply to the main battery box when the power line generates the lightning signal; and when detecting that the main battery box has a fault, switching the power supply to the standby battery box through the selection switch circuit.
As shown in fig. 1, the lightning signal on the power line can be monitored by the monitoring and controlling circuit, and when the lightning signal on the power line is detected, the alternating current power supply loop of the power line is cut off. The lightning signal is prevented from being transmitted to the back-end circuit through the power line, and therefore the back-end circuit is prevented from being damaged by the lightning signal. In addition, the monitoring control circuit can monitor the state of the main battery box, when the main battery box is monitored to be out of order or the main battery box needs to be replaced due to overlong service time, the power supply of the server can be switched to the standby battery box, and a user can be reminded to replace the main battery box through a display or a loudspeaker, so that the stable power supply and the uninterrupted working state of the server are guaranteed.
Referring to fig. 2, the monitoring control circuit includes: the lightning signal monitoring circuit is used for monitoring lightning signals on a power line.
Specifically, as shown in FIG. 2, in one embodiment of the present invention, the lightning signal monitoring circuit includes: the lightning signal release circuit is used for releasing lightning signals and comprises a first voltage dependent resistor RX1 and a second voltage dependent resistor RX2, one end of the first voltage dependent resistor RX1 is connected with a first power line, one end of the second voltage dependent resistor RX2 is connected with a second power line, and the other ends of the first voltage dependent resistor RX1 and the second voltage dependent resistor RX2 are respectively connected with a reference ground; the first voltage dependent resistor RX1 and the second voltage dependent resistor RX2 are connected in parallel to a signal input end of the mains alternating current. In this way, when a lightning signal appears at the power input end of the power line, most of the lightning signal can be discharged to the ground through the first varistor RX1 and the second varistor RX2 connected in parallel. The release principle is due to the non-linear nature of the piezoresistors. When the thunder and lightning signal that surpasss its voltage value appears at piezo-resistor's both ends, piezo-resistor's resistance value reduces to and is close short circuit state to can release the thunder and lightning signal of the overwhelming majority to the ground, and then avoid strong signal to carry out the rear end circuit, avoid burning out the rear end circuit. It should be noted that in some other embodiments of the present invention, other pressure-sensitive devices may be used to release the lightning signal. Such as a pressure sensitive diode or the like.
The coupling circuit is used for coupling and outputting the residual lightning signals and comprises a coupling transformer T1, and a primary coil of the coupling transformer T1 is respectively connected with the first power line and the second circuit line; as shown in fig. 2, when a lightning signal occurs on the power line, most of the lightning signal may be discharged to the ground through the first and second piezoresistors RX1 and RX 2. However, the power line may still have a residual lightning signal, and a part of the residual lightning signal may be coupled to the lightning signal detection terminal through the coupling transformer T1. In this way, lightning signals on the power line can be detected.
The detection circuit is connected with the secondary coil of the coupling transformer T1, wherein one end of the secondary coil of the coupling transformer T1 is connected with the input end of the detection circuit, and the other end of the secondary coil of the coupling transformer T1 is connected with the reference ground. After the lightning signal is coupled to the lightning signal detection terminal through the coupling transformer T1, the lightning signal can be detected through the detection circuit. The thunder and lightning signal that comes out through detecting can transmit the controller, cuts off the power supply end of alternating current through the controller to avoid thunder and lightning signal to get into back end circuit, and then avoid causing the damage to back end circuit.
The battery monitoring circuit is used for monitoring the state of the main battery box; as shown in fig. 2, the state of the main battery box can be monitored by the battery monitoring circuit. The controller collects current and voltage information of the main battery box through the battery monitoring circuit, and obtains internal resistance and no-load voltage of the battery box according to the current and voltage information. The internal resistance and the no-load voltage of the main battery box can be obtained by solving the following equation:
wherein the content of the first and second substances,
、
the current values of the main battery box at the time t and the time t + delta t are respectively shown, ut and Ut + delta t respectively show the voltage values of the main battery box at the time t and the time t + delta t, and x and r respectively show the no-load voltage value and the internal resistance of the main battery box. The residual electric quantity of the battery pack can be obtained by utilizing a relation curve of the no-load voltage and the residual electric quantity of the battery pack, the relation curve can be prestored in a storage module of the controller, and the relation curve of the residual electric quantity and the no-load voltage is provided by a battery manufacturer; in addition, in other embodiments, the communication between the controller and the main battery can be obtained. And obtaining a real-time service life value of the main battery box through the obtained residual electric quantity of the main battery box, the internal resistance of the main battery box and a relation curve of the service life of the main battery box, the residual electric quantity of the main battery box and the internal resistance of the main battery box. The relation curve of the service life of the main battery box, the residual electric quantity of the main battery box and the internal resistance of the main battery box is provided by a main battery box manufacturer and stored in a memory of the controller. Therefore, the residual electric quantity and the internal resistance of the main battery box can be obtained by acquiring the voltage value and the current value of the main battery box. And according to the remaining capacity of the main battery box and the internal resistance of the main battery box and the service life curve of the main battery box provided by a manufacturer, the service life information of the main battery box can be obtained, when the service life of the main battery box is up, the main battery box and the main battery box are prone to failure, and at the moment, a power supply loop is switched to a standby battery box.
The control circuit is respectively connected with the lightning signal monitoring circuit and the battery monitoring circuit so as to switch a power supply to the main battery box when a lightning signal appears on a power line; and when detecting that the main battery box has a fault, switching the power supply to the standby battery box through the selection switch circuit. The control circuit can be used for detecting a lightning signal and a main battery box fault signal, and the switch switching circuit is used for switching corresponding power supply channels, so that stable power supply of the server can be ensured.
Referring to fig. 2, in one embodiment of the present invention, the lightning signal monitoring circuit further includes: the clamping circuit comprises a voltage stabilizing diode D1 and a voltage stabilizing diode D2, the anode of the voltage stabilizing diode D1 is connected with a power supply VCC, the cathode of the voltage stabilizing diode D1 is connected with the other end of the secondary coil of the coupling transformer T1, the cathode of the voltage stabilizing diode D2 is connected with the other end of the secondary coil of the coupling transformer T1, and the anode of the voltage stabilizing diode D2 is connected with a reference ground. As shown in fig. 2, the voltage amplitude of the coupling transformer T1 coupled to the detector circuit is limited by the zener diode D1 and the zener diode D2, the voltage output to the detector circuit is limited within a certain range, so as to facilitate the subsequent detection of the detector circuit, and avoid the high voltage damaging the subsequent detector circuit.
Referring to fig. 2, in one embodiment of the present invention, the detector circuit includes: the device comprises a capacitor C1, a capacitor C2, a resistor R6, a resistor R7, a resistor R8, a capacitor C3, an integrated operational amplifier U1, an integrated operational amplifier U2 and an envelope detector U3, wherein one end of the capacitor C1 is connected with one end of a secondary coil of the coupling transformer T1; one end of the capacitor C2 is connected with the other end of the capacitor C1; one end of the resistor R6 is connected with the common end of the capacitor C2 and the capacitor C1; one end of the resistor R7 is connected with the one end of the capacitor C1; one end of the resistor R8 is connected with the other end of the resistor R7, and the other end of the resistor R8 is connected with the other end of the capacitor C2; one end of the capacitor C3 is connected with the other end of the resistor R6, and the other end of the capacitor C3 is connected with the common end of the resistor R7 and the resistor R8; a positive phase input end of the integrated operational amplifier U1 is connected to the other end of the capacitor C2, an inverted phase input end of the integrated operational amplifier U1 is connected to an output end, an output end of the integrated operational amplifier U1 is further connected to one end of a resistor R1, the other end of the resistor R1 is connected to one end of a resistor R2, and the other end of the resistor R2 is connected to a reference ground; a positive phase input end of the integrated operational amplifier U2 is connected with the one end of the resistor R2, a negative phase input end of the integrated operational amplifier U2 is connected with an output end, and an output end of the integrated operational amplifier U2 is connected with a common end of the resistor R6 and the capacitor C3; the input end of the envelope detector U3 is connected with the integrated operational amplifier U1, and the output end of the envelope detector U3 is connected with the control circuit.
As shown in fig. 2, a filter circuit is formed by the capacitor C1, the capacitor C2, the resistor R6, the resistor R7, the resistor R8, the capacitor C3, the integrated operational amplifier U1, and the integrated operational amplifier U2, so as to filter the power frequency signal of the alternating current to avoid the influence of the alternating current signal on the subsequent detection. Because the detection circuit only detects the thunder and lightning signal, so need the alternating current power frequency signal of filtering, avoid alternating current power frequency signal's signal interference. The filtering frequency point of a filter circuit consisting of the capacitor C1, the capacitor C2, the resistor R6, the resistor R7, the resistor R8 and the capacitor C3 is the power frequency. When the signal is the thunder and lightning signal that is less than the power frequency signal, low frequency thunder and lightning signal accessible resistance R7 and resistance R7 transmit the detection circuit to the rear end, and when the signal is the thunder and lightning signal that is higher than the power frequency signal, high frequency thunder and lightning signal accessible electric capacity C1 and C2 transmit the detection circuit to the rear end. When the signal is the alternating current signal of the power frequency signal, the alternating current signal is transmitted to the reference ground through the channel of the capacitor C1 and the resistor R6, the resistor R7 and the capacitor C3, and therefore the filtering of the power frequency signal is achieved. The integrated operational amplifier U1 and the integrated operational amplifier U2 form a voltage follower, and can be used for isolating and matching a filter circuit at the front end with a detection circuit at the rear end. Since the output impedance of the filter circuit at the front end may not match the impedance of the detector circuit, the attenuation of the lightning signal may be further reduced, and such attenuation may be reduced by forming the voltage follower by the integrated operational amplifier U1 and the integrated operational amplifier U2. The lightning signal is more completely output, and the envelope detector U3 can perform detection better. Through envelope detector U3 detectable goes out the thunder and lightning signal, when the thunder and lightning signal appears on the power line, then can output certain range the thunder and lightning signal extremely envelope detector U3 carries out the detection output. When no lightning signal is present on the power line, no lightning signal is output to the envelope detector U3.
Referring to fig. 2, in an embodiment of the present invention, the detector circuit further includes a dc filter circuit, an input terminal of the envelope detector U3 is connected to an input terminal of the integrated operational amplifier U1 through the dc filter circuit, and the dc filter circuit includes: the envelope detector comprises a capacitor C7, a resistor R3, a resistor R4 and a resistor R5, wherein one end of the capacitor C7 is connected with the input end of the envelope detector U3; one end of the resistor R3 is connected with the other end of the capacitor C7, and the other end of the resistor R3 is connected with the output end of the integrated operational amplifier U1; one end of the resistor R4 is connected with the other end of the resistor R3, and the other end of the resistor R4 is connected with a reference ground; one end of the resistor R5 is connected with the one end of the resistor R3, and the other end of the resistor R5 is connected with a reference ground.
Specifically, the capacitor C7, the resistor R3, the resistor R4 and the resistor R5 can filter out direct-current interference signals output by the integrated operational amplifier U1 and the integrated operational amplifier U2. Through resistance R3, resistance R4 and resistance R5 constitute bleeder circuit to connect in series at envelope detector U3's signal input end through electric capacity C7, can filter direct current interference signal, avoid direct current interference signal to enter into envelope detector U3, thereby avoid the false detection ripples condition to take place. In other embodiments, the dc filter circuit may not be needed when it is ensured that no dc signal is output to the envelope detection circuit.
Referring to fig. 2, in one embodiment of the present invention, the battery monitoring circuit includes: the primary side coil L1 is connected in series with a power supply line of the main battery box; the Hall detector U2 is used for detecting the current of the primary coil L1; the positive phase input end of the integrated operational amplifier U4 is connected with the positive output end of the main battery box through a resistor R9 and a resistor R10, the negative phase input end of the integrated operational amplifier U4 is connected with a reference ground through a resistor R12, the negative phase input end of the integrated operational amplifier U4 is also connected with the output end of the integrated operational amplifier U4 through a resistor R11, and the output end of the integrated operational amplifier U4 is connected with the voltage detection end of the control circuit; the positive phase input end of the integrated operational amplifier U5 is connected with one output end of the Hall detector U8 through a resistor R13, and the negative phase input end of the integrated operational amplifier U5 is connected with the output end of the integrated operational amplifier U5 through a resistor R14; the non-inverting input end of the integrated operational amplifier U6 is connected with the other output end of the Hall detector U8 through a resistor R19, the inverting input end of the integrated operational amplifier U6 is connected with the inverting input end of the integrated operational amplifier U5 through a resistor R15, and the inverting input end of the integrated operational amplifier U6 is also connected with the output end of the integrated operational amplifier U6 through a resistor R16; the positive phase input end of the integrated operational amplifier U7 is connected with the output end of the integrated operational amplifier U6 through a resistor R17, the positive phase input end of the integrated operational amplifier U7 is further connected with a reference ground through a resistor R18, the negative phase input end of the integrated operational amplifier U18 is connected with the output end of the integrated operational amplifier U5 through a resistor R20, the negative phase input end of the integrated operational amplifier U18 is further connected with the output end of the integrated operational amplifier U7 through a resistor R21, and the output end of the integrated operational amplifier U7 is further connected with the current detection end of the control circuit through a resistor R22.
Specifically, as shown in fig. 2, the circuit detects the supply current of the main battery box through a hall detector U2. The working process of the intelligent power supply device is that when the main battery box provides a power supply for the server, a certain current can be generated on the primary coil L1, the current can generate a certain corresponding coil magnetic field through a line to generate a Hall effect, the Hall current can be detected through the Hall element, detection voltage values are output from two ends, and the voltage values correspond to the current of the primary coil L1. Therefore, the power supply current of the main battery box can be obtained by obtaining the voltage value. More specifically, the hall detection principle is that, when the primary side current changes, the magnetic field balance is broken, and the element senses the magnetic field imbalance to generate a weak hall voltage Vh, and since the voltage is small, the signal needs to be amplified and adjusted. In the embodiment of the invention, the integrated operational amplifier U5, the integrated operational amplifier U6 and the integrated operational amplifier U7 form a symmetrical amplifying circuit, so that a weak signal output by a Hall element can be amplified and output with high precision, and the high-precision detection of the output current of the main battery box can be realized. In addition, the voltage of the main battery box can be isolated, amplified and output through the integrated operational amplifier U4. Therefore, the voltage value and the current value of the main battery box can be output to the controller through the output ends of the integrated operational amplifier U4 and the integrated operational amplifier U7, the service life of the main battery box is calculated and obtained through the controller, when the aging of the battery box is calculated and needs to be replaced, an alarm is given, and a power supply loop of the server is switched to the standby battery box.
Referring to fig. 2, in an embodiment of the present invention, the battery monitoring circuit further includes: the primary side coil L1 is connected with the positive output end of the main battery box through the diode D3, the anode of the diode D3 is connected with the positive output end of the main battery box, and the cathode of the diode D3 is connected with the primary side coil L1; the positive phase input end of the integrated operational amplifier U4 is connected with the positive output end of a main battery box through a resistor R9, a resistor R10 and a diode D4, wherein the anode of the diode D4 is connected with the main battery box, and the cathode of the diode D4 is connected with the positive phase input end of the integrated operational amplifier U4 through the resistor R9 and the resistor R10; one end of the capacitor C8 is connected with the common end of the resistor R9 and the resistor R10, and the other end of the capacitor C8 is connected with the reference ground.
Specifically, through the one-way conductivity of the diode D3 and the diode D4, when the main battery box is reversely connected, the negative voltage is prevented from being output to the server end or the input end of the integrated operational amplifier U4, so that the server and the integrated operational amplifier U4 are prevented from being damaged. The capacitor C8 is connected between the positive phase input end of the integrated operational amplifier U4 and the reference ground in parallel, so that interference signals can be filtered out, and the stability of input signals at the positive phase input end of the integrated operational amplifier U4 is ensured.
Referring to fig. 3, in one embodiment of the present invention, the control circuit includes a controller and a relay switch circuit, the controller is connected to the relay switch circuit, and the relay switch circuit includes: the relay K1, the triode Q1 and the diode D1 are connected, a first end of a channel of the relay K1 is connected with a power line, and a second end of the channel of the relay K1 outputs alternating current to charge the main battery box and/or the standby battery box; a collector of the triode Q1 is connected with a first controlled end of the relay K1, a second controlled end of the relay K1 is connected with a power supply, an emitter of the triode Q1 is connected with a reference ground, and a base of the triode Q1 is also connected with one control end of the control circuit through a resistor R23; the anode of the diode D1 is connected with the first controlled end of the relay K1, and the cathode of the diode D1 is connected with the second controlled end of the relay K1.
As shown in fig. 3, fig. 3 is a structure diagram of a relay switch circuit according to an embodiment of the present invention, wherein the circuit structure employs a single-channel relay K1. The triode Q1, the resistor R23 and the resistor R24 are used as a driving circuit and are used for driving the single-channel relay K1 to be switched on or switched off. For example, when the controller outputs a high level signal, the transistor Q1 is turned on, so that the single-channel relay K1 generates a magnetic attraction force, and the switch of the relay J1 can be attracted and turned on. Conversely, when the controller outputs a low level, the switch of the relay K1 is reset to the disconnection terminal. Therefore, the control on or off of one power supply can be realized. When the two power supplies are required to be switched on or switched off, 2 relay switch circuits can be adopted.
Referring to fig. 1, in an embodiment of the present invention, the power dynamic monitoring system further includes: the input end of the AC-DC conversion circuit is connected with the second end of the channel of the relay K1, and the output end of the AC-DC conversion circuit is connected with the main battery box to charge the main battery box and/or the backup battery box and/or supply power to the server. The 220V alternating current can be converted into the direct current charging voltage of the main battery box through the AC-DC conversion circuit, so that the main battery box and the spare battery box are charged. Meanwhile, when AC alternating current is output, the power supply on the power line is not stopped, and the server can be supplied with power through the AC-DC conversion circuit. As shown in fig. 1, the power supply DC output by the AC-DC conversion circuit may be output to the server through the selection switch, or may be directly output to the server.
It should be noted that the selection switch can be implemented with reference to the relay switch circuit of fig. 2, and the 2-channel or 3-channel selection control circuit can be implemented by two or three relay switch circuits of fig. 3. For brevity of the text, the detailed description is not repeated again.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent arrangements may be substituted for some of the features of the embodiments described above. All equivalent structures made by using the contents of the specification and the attached drawings of the invention can be directly or indirectly applied to other related technical fields, and are also within the protection scope of the patent of the invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (8)
1. A power dynamics monitoring system, comprising:
the main battery box is used for supplying power to the server when the commercial power alternating current is cut off;
the standby battery box is used for supplying power to the server when the commercial power alternating current is cut off and the main battery box fails;
the main battery box and the standby battery box are respectively connected with the server through the selection switch circuit so as to selectively control the power supply of the main battery box and the standby battery box;
the monitoring control circuit is respectively connected with the power line, the main battery box and the selection switch circuit so as to detect a lightning signal of the power line and switch the power supply to the main battery box when the lightning signal appears on the power line; when detecting that the main battery box has a fault, switching a power supply to the standby battery box through the selection switch circuit;
wherein the content of the first and second substances,
the monitoring control circuit includes:
the lightning signal monitoring circuit is used for monitoring a lightning signal on a power line;
the battery monitoring circuit is used for monitoring the state of the main battery box;
the control circuit is respectively connected with the lightning signal monitoring circuit and the battery monitoring circuit so as to switch a power supply to the main battery box when a lightning signal appears on a power line; when detecting that the main battery box has a fault, switching a power supply to the standby battery box through the selection switch circuit;
a lightning signal release circuit for releasing a lightning signal, the lightning signal release circuit including a first varistor RX1 and a second varistor RX2, one end of the first varistor RX1 being connected to a first power line, one end of the second varistor RX2 being connected to a second power line, and the other ends of the first and second varistors RX1 and RX2 being connected to a reference ground, respectively;
the coupling circuit is used for coupling and outputting the residual lightning signals and comprises a coupling transformer T1, and a primary coil of the coupling transformer T1 is respectively connected with the first power line and the second circuit line;
and the detection circuit is connected with the secondary coil of the coupling transformer T1, wherein one end of the secondary coil of the coupling transformer T1 is connected with the input end of the detection circuit, and the other end of the secondary coil of the coupling transformer T1 is connected with a reference ground.
2. The power dynamics monitoring system of claim 1, wherein the lightning signal monitoring circuit further comprises: the clamping circuit comprises a voltage stabilizing diode D1 and a voltage stabilizing diode D2, the anode of the voltage stabilizing diode D1 is connected with a power supply VCC, the cathode of the voltage stabilizing diode D1 is connected with the other end of the secondary coil of the coupling transformer T1, the cathode of the voltage stabilizing diode D2 is connected with the other end of the secondary coil of the coupling transformer T1, and the anode of the voltage stabilizing diode D2 is connected with a reference ground.
3. The power dynamics monitoring system of claim 1, wherein the detection circuit comprises:
a capacitor C1, one end of the capacitor C1 being connected to the one end of the secondary coil of the coupling transformer T1;
one end of the capacitor C2 is connected with the other end of the capacitor C1;
one end of the resistor R6 is connected with the common end of the capacitor C2 and the capacitor C1;
a resistor R7, one end of the resistor R7 being connected to the one end of the capacitor C1;
one end of the resistor R8 is connected with the other end of the resistor R7, and the other end of the resistor R8 is connected with the other end of the capacitor C2;
one end of the capacitor C3 is connected with the other end of the resistor R6, and the other end of the capacitor C3 is connected with the common end of the resistors R7 and R8;
the non-inverting input end of the integrated operational amplifier U1 is connected with the other end of the capacitor C2, the inverting input end of the integrated operational amplifier U1 is connected with the output end, the output end of the integrated operational amplifier U1 is also connected with one end of a resistor R1, the other end of the resistor R1 is connected with one end of a resistor R2, and the other end of the resistor R2 is connected with a reference ground;
the positive phase input end of the integrated operational amplifier U2 is connected with the one end of the resistor R2, the negative phase input end of the integrated operational amplifier U2 is connected with the output end, and the output end of the integrated operational amplifier U2 is connected with the common end of the resistor R6 and the capacitor C3;
and the input end of the envelope detector U3 is connected with the integrated operational amplifier U1, and the output end of the envelope detector U3 is connected with the control circuit.
4. The power dynamics monitoring system of claim 3, wherein the detection circuit further comprises a DC filter circuit, the input terminal of the envelope detector U3 is connected to the input terminal of the integrated operational amplifier U1 through the DC filter circuit, and the DC filter circuit comprises:
one end of the capacitor C7 is connected with the input end of the envelope detector U3;
one end of the resistor R3 is connected with the other end of the capacitor C7, and the other end of the resistor R3 is connected with the output end of the integrated operational amplifier U1;
one end of the resistor R4 is connected with the other end of the resistor R3, and the other end of the resistor R4 is connected with a reference ground;
and one end of the resistor R5 is connected with the one end of the resistor R3, and the other end of the resistor R5 is connected with a reference ground.
5. The dynamic power supply monitoring system according to any one of claims 1 to 4, wherein the battery monitoring circuit comprises:
the primary side coil L1 is connected in series with a power supply line of the main battery box;
the Hall detector U2 is used for detecting the current of the primary coil L1;
the positive phase input end of the integrated operational amplifier U4 is connected with the positive output end of the main battery box through a resistor R9 and a resistor R10, the negative phase input end of the integrated operational amplifier U4 is connected with a reference ground through a resistor R12, the negative phase input end of the integrated operational amplifier U4 is also connected with the output end of the integrated operational amplifier U4 through a resistor R11, and the output end of the integrated operational amplifier U4 is connected with the voltage detection end of the control circuit;
the positive phase input end of the integrated operational amplifier U5 is connected with one output end of the Hall detector U8 through a resistor R13, and the negative phase input end of the integrated operational amplifier U5 is connected with the output end of the integrated operational amplifier U5 through a resistor R14;
the non-inverting input end of the integrated operational amplifier U6 is connected with the other output end of the Hall detector U8 through a resistor R19, the inverting input end of the integrated operational amplifier U6 is connected with the inverting input end of the integrated operational amplifier U5 through a resistor R15, and the inverting input end of the integrated operational amplifier U6 is also connected with the output end of the integrated operational amplifier U6 through a resistor R16;
the current detection circuit comprises an integrated operational amplifier U7, wherein a positive phase input end of the integrated operational amplifier U7 is connected with an output end of the integrated operational amplifier U6 through a resistor R17, a positive phase input end of the integrated operational amplifier U7 is further connected with a reference ground through a resistor R18, an inverting input end of the integrated operational amplifier U18 is connected with an output end of the integrated operational amplifier U5 through a resistor R20, an inverting input end of the integrated operational amplifier U18 is further connected with an output end of the integrated operational amplifier U7 through a resistor R21, and an output end of the integrated operational amplifier U7 is further connected with a current detection end of the control circuit through a resistor R22.
6. The power dynamics monitoring system of claim 5, wherein the battery monitoring circuit further comprises:
the primary coil L1 is connected with the positive output end of the main battery box through the diode D3, wherein the anode of the diode D3 is connected with the positive output end of the main battery box, and the cathode of the diode D3 is connected with the primary coil L1;
the positive phase input end of the integrated operational amplifier U4 is connected with the positive output end of the main battery box through a resistor R9, a resistor R10 and a diode D4, wherein the anode of the diode D4 is connected with the main battery box, and the cathode of the diode D4 is connected with the positive phase input end of the integrated operational amplifier U4 through the resistor R9 and the resistor R10;
and one end of the capacitor C8 is connected with the common end of the resistor R9 and the resistor R10, and the other end of the capacitor C8 is connected with the reference ground.
7. The power dynamics monitoring system of claim 1, wherein the control circuit includes a controller and a relay switch circuit, the controller coupled to the relay switch circuit, the relay switch circuit including:
a first end of a channel of the relay K1 is connected with a power line, and a second end of the channel of the relay K1 outputs alternating current to charge the main battery box and/or the standby battery box;
a collector of the triode Q1 is connected with a first controlled end of the relay K1, a second controlled end of the relay K1 is connected with a power supply, an emitter of the triode Q1 is connected with a reference ground, and a base of the triode Q1 is further connected with one control end of the control circuit through a resistor R23;
and the anode of the diode D1 is connected with the first controlled end of the relay K1, and the cathode of the diode D1 is connected with the second controlled end of the relay K1.
8. The power dynamics monitoring system of claim 7, further comprising:
and the input end of the AC-DC conversion circuit is connected with the second end of the channel of the relay K1, and the output end of the AC-DC conversion circuit is connected with the main battery box, and is used for charging the main battery box and/or the standby battery box and/or supplying power to the server after voltage conversion.
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| EP3859959A1 (en) * | 2018-09-29 | 2021-08-04 | ZTE Corporation | Lightning surge protection circuit, method and system, and storage medium and electronic apparatus |
| CN214850476U (en) * | 2021-06-28 | 2021-11-23 | 上海音特电子有限公司 | Protection circuit of power line carrier PLC collector |
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| JPH1094168A (en) * | 1996-09-13 | 1998-04-10 | Nippon Antenna Co Ltd | Lightning discharge circuit |
| JP2005245190A (en) * | 2004-01-28 | 2005-09-08 | Densei Lambda Kk | Power supply system equipped with thunder detecting means |
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