An intelligent integrated measurement and control unit with emergency power management and its application method

Abstract

The present invention provides an intelligent integrated measurement and control unit with emergency power management and its application method. The unit includes an input power supply module, a charging management unit, an emergency power output management unit, a battery module, and an intelligent integrated measurement and control unit processor system. When the intelligent integrated measurement and control unit is in a normal power supply state, the emergency power output management unit controls the battery module for charging management and converts the external power supply into a DC power supply to supply power to each module of the intelligent integrated measurement and control unit. When the intelligent integrated measurement and control unit is in an emergency working state, the emergency power output management unit controls the battery module for discharge management to supply power to each module of the intelligent integrated measurement and control unit. The present invention combines functions such as power supply, charging, battery management, emergency power output management, and intelligent measurement and control, greatly saving the cabinet space of primary equipment, reducing the overall comprehensive cost, and improving the stability of power supply.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to an intelligent integrated measurement and control unit with emergency power management and an application method of the unit. Background Art

[0002] With the popularization of smart grid applications in power systems, intelligent integrated measurement and control units, instruments and other related automation equipment are also widely used in primary high-voltage equipment, which greatly improves the measurement accuracy and intelligent control of related equipment. Therefore, providing stable and reliable operating power for these devices has also become the focus of power supply work.

[0003] There are generally three modes of operating power supply: one is to configure a DC panel, the second is to use a prefabricated special AC220V winding of a PT to provide operating power, and the third is a dedicated distributed DC power supply. The DC panel has a large battery capacity and high power supply reliability. It is mainly used in substations, large-scale or core switchgear; however, the cost of the DC panel is relatively high, the operating environment requirements are strict, and the operation and maintenance are complex.

[0004] The PT power supply mode is simple and flexible to implement, easy to install and saves investment, and is more suitable for the terminal small and medium-sized user distribution room. However, this method also has the problem of unstable output and low reliability. When a short circuit occurs in the equipment and the PT output voltage drops sharply, it is not enough to provide operating power; or the PT fuse blows due to a fault, causing the secondary winding to lose voltage completely. At this time, the equipment will completely lose operating voltage, seriously affecting the safe and stable operation of the distribution network.

[0005] Distributed DC power supply is a relatively simple and reliable power supply mode. It consists of a single power module installed on the cabinet. Combined with the PT power supply mode, it charges the battery and provides energy to the long-term running load when there is external power; when the external power fails, the battery provides energy. The disadvantage is that the equipment is redundant and takes up limited space in the equipment cabinet. However, due to the small battery capacity, the emergency power output time is limited, and the simple function cannot detect the real-time status of all electrical equipment, and the battery capacity is often fully discharged. When the operation and maintenance personnel come to the fault site to deal with it, if there is no external power, the device cannot be operated due to lack of power. Summary of the invention

[0006] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide an intelligent integrated measurement and control unit with emergency power supply management and a method thereof. The system and method can solve the problems of unstable output, low reliability, low safety, redundant equipment, low space utilization, limited output time, simple functions, and inability to operate without electricity in the prior art. The system and method combine the functions of power supply, charging, battery management, emergency power supply output management, and intelligent measurement and control, which greatly saves the cabinet space of primary equipment, reduces the overall comprehensive cost, and improves the stability of power supply.

[0007] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0008] An intelligent integrated measurement and control unit with emergency power management, installed in the secondary chamber of an intelligent switch cabinet, includes:

[0009] An input power module, a charging management unit, an emergency power output management unit, a battery module, and an intelligent integrated measurement and control unit processor system. The intelligent integrated measurement and control unit processor system is respectively connected to the power management unit, the emergency power output management unit, and the battery module. The input end of the charging management unit is connected to the input power module, and is used to convert the external power supply into a DC power supply and output it to charge the battery module and supply power to each module of the intelligent integrated measurement and control unit. The emergency power output management unit is connected to the charging management unit, and is used to output an emergency power output signal to the charging management unit to manage and control the charging or discharging of the battery module;

[0010] When the intelligent integrated measurement and control unit is in a normal power supply state, the emergency power output management unit controls the battery module for charging management, and converts the external power supply into a DC power supply and outputs it to supply power to each module of the intelligent integrated measurement and control unit; when the intelligent integrated measurement and control unit is in an emergency working state, the emergency power output management unit controls the battery module for discharging management to supply power to each module of the intelligent integrated measurement and control unit.

[0011] A further solution is that the charging management unit includes a UC3844 control chip, a first linear voltage regulator, a second linear voltage regulator, a discharge control circuit, and a charging control circuit. The input end of the UC3844 control chip is connected to the external power supply. The UC3844 control chip is connected to the first linear voltage regulator. A transformer T3 is connected between the first linear voltage regulator and the second linear voltage regulator. The first linear voltage regulator is connected to one secondary winding of the transformer T3. The second linear voltage regulator is connected to the other secondary winding of the transformer T3. The output end of the UC3844 control chip is connected to one end of the primary winding of the transformer T3. The other end of the primary winding of the transformer T3 is connected to the discharge control circuit and the charging control circuit.

[0012] A further solution is that the COMP terminal of the UC3844 control chip is sequentially connected to a triode Q16, a triode Q15, a second optocoupler, and an eighth optocoupler. The VFB terminal of the UC3844 control chip is connected to a first optocoupler. The VCC terminal of the UC3844 control chip is connected to the V+ terminal of the first linear voltage regulator. The OUTPUT terminal of the UC3844 control chip is connected to a MOS transistor Q23 and a transformer T2. The gate of the MOS transistor Q23 is connected to the OUTPUT terminal of the UC3844 control chip. The drain of the MOS transistor Q23 is connected to the primary winding of the transformer T2. One end of the secondary winding of the transformer T2 is connected to the transformer T3.

[0013] A further solution is that the discharge control circuit includes a MOS transistor Q28, and the charge control circuit includes a MOS transistor Q29. The source of the MOS transistor Q28 is connected to the drain of the MOS transistor Q29. The gate of the MOS transistor Q28 is connected to a sixth optocoupler and is connected to a relay K3. Between the drain of the MOS transistor Q28 and the transformer T3, a parallel resistance circuit, a first parallel capacitor circuit, an inductance circuit, and a second parallel capacitor circuit are sequentially connected.

[0014] Wherein, a battery reverse connection protection output circuit is further connected between the gate and the source of the MOS transistor Q29 and the battery module.

[0015] A further solution is that the emergency power supply output management unit includes an activation control circuit, an input power loss warning circuit, a battery warning circuit, and an undervoltage warning circuit. The input power loss warning circuit is used to control the input power module to perform discharge management when the power output terminal loses power, so as to supply power to each module of the intelligent integrated measurement and control unit. The activation control circuit is used to perform activation control on the battery module. The battery warning circuit is used to output a battery warning signal. The undervoltage warning circuit is used to output an undervoltage warning signal.

[0016] A further solution is that the battery warning circuit includes a TL431 voltage regulator source, a second optocoupler, and a fifth optocoupler. The output terminal of the second optocoupler is connected to the COMP terminal of the UC3844 control chip. One input terminal of the second optocoupler is connected to one input terminal of the fifth optocoupler. The other input terminal of the fifth optocoupler is connected to the CA terminal of the TL431 voltage regulator source.

[0017] A further solution is that the activation control circuit includes a signal comparator, a triode Q11, a triode Q19, a triode Q7, a triode Q8, a triode Q18, and a MOS transistor Q27. The inverting input terminal of the signal comparator is connected to a voltage of 2.5V. The non-inverting input terminal of the signal comparator is connected to Vo+, and is connected to a relay K1 through a resistor. The output terminal of the signal comparator is connected to the emitter of the triode Q11. The base of the triode Q11 is connected to a tenth optocoupler. The collector of the triode Q11 is connected to Vo-. The base of the triode Q8 is connected to the emitter of the triode Q11. The emitter of the triode Q8 is connected to the activation signal terminal HK through a resistor and a diode. The collector of the triode Q8 is connected to a fourth optocoupler. One input terminal of the fourth optocoupler is connected to the collector of the triode Q8, and the other input terminal of the fourth optocoupler is connected to one input terminal of the second optocoupler. The collector of the triode Q8 is connected to the base of the triode Q18. The emitter of the triode Q18 is connected to the gate of the MOS transistor Q27. The collector of the triode Q18 is connected to Vo-. The source of the MOS transistor Q27 is connected to Vo+, and the drain of the MOS transistor Q27 is connected to Vo-. The emitter of the triode Q19 is connected to the base and the emitter of the triode Q8. The base of the triode Q19 is connected to the collector of the triode Q7. The collector of the triode Q19 is connected to the base of the triode Q7. The emitter of the triode Q7 is connected to Vo-.

[0018] A further solution is that the input power supply module includes a varistor, a capacitor CX1, an inductor L1, and a rectifier bridge DB1. The varistor is connected to the mains power supply. The varistor is connected to the capacitor CX1. The capacitor CX1 is connected to the 1 and 4 terminals of the inductor L1. The 2 and 3 terminals of the inductor L1 are connected to the input terminal of the rectifier bridge DB1. The output terminal of the rectifier bridge DB1 is connected to the HV and HGND terminals;

[0019] The input power loss warning circuit includes a tenth optocoupler and an eleventh optocoupler. The input terminals of the tenth optocoupler and the eleventh optocoupler are connected to the 3 terminal of the inductor L1 and the input terminal of the rectifier bridge DB1 through a filtering circuit. The output terminal of the eleventh optocoupler is connected to a triode Q3. The base of the triode Q3 is connected to the output terminal of the eleventh optocoupler. The collector of the triode Q3 is connected to the warning input terminal. The emitter of the triode Q3 is connected to the POK terminal.

[0020] A further solution is that the output end of the fourth optocoupler is connected to a triode Q4. The base of the triode Q4 is connected to the output end of the fourth optocoupler. The collector of the triode Q4 is connected to the alarm input end, and the emitter of the triode Q4 is connected to the HOK end. The output end of the third optocoupler is connected to a triode Q5. The base of the triode Q5 is connected to the output end of the third optocoupler. The collector of the triode Q5 is connected to the alarm input end, and the emitter of the triode Q5 is connected to the VL end. The output end of the fifth optocoupler is connected to a triode Q6. The base of the triode Q6 is connected to the output end of the fifth optocoupler. The collector of the triode Q6 is connected to the alarm input end, and the emitter of the triode Q6 is connected to the VL end.

[0021] An application method of an intelligent integrated measurement and control unit with emergency power management. This method is applied to the above intelligent integrated measurement and control unit with emergency power management for emergency power output management. The method includes the following steps:

[0022] When an external power supply is connected, the charging management unit of the intelligent integrated measurement and control unit works normally, charges the battery module, and at the same time provides energy to the long-term running load. During energy storage and switching-on and switching-off operations, the battery module provides more load energy requirements.

[0023] The power supply management system of the intelligent integrated measurement and control unit outputs power externally to provide DC power for related electrical equipment.

[0024] When the intelligent integrated measurement and control unit is in the emergency working state, the emergency power output management unit controls the battery module to provide emergency power output for related electrical equipment, and the battery module provides energy output.

[0025] After the intelligent measurement and control unit detects that the functions of each module have been emergency processed, and data storage and module operation shutdown are performed, the emergency power output is immediately disconnected, so that the remaining energy of the battery module can be maximally reserved, and related equipment can be started without external power access to query and repair fault information.

[0026] Thus, compared with the prior art, the present invention has the following advantages:

[0027] 1. Installed dispersedly, saving floor area and reducing cost. The present invention is directly installed in the instrument box of the intelligent switch cabinet (or the electric operation box of the outdoor device), which can save the floor area of the DC panel. Since the power supply is in the switch cabinet, the amount of cable used can be reduced, saving the investment in primary equipment and the cable construction workload. When the total number is not large, its total price is lower than that of the DC panel system, which can reduce the total project cost. At the same time, line loss can be reduced during operation, spare parts can be reduced, and operation cost can be saved.

[0028] 2. Embedded power supply method, greatly improving reliability. With the embedded power supply method, when a fault occurs in a certain circuit, the power supply devices of other circuits are not affected, avoiding the situation that the entire station has no operating power due to a single fault. Compared with the centralized power supply DC panel, its overall reliability is greatly improved.

[0029] 3. Multiple input and output methods, wide application range. It can provide DC outputs of 220V, 110V, 48V, and 24V according to customer needs, and the AC input range is 85 - 265V, flexibly applicable to PT and mains power supply.

[0030] 4. Intelligent management and maintenance, intelligent high-frequency power supply technology, self-monitoring and self-diagnosis. It can display and alarm locally, and can also communicate through the network to achieve unattended automated remote management. It has a built-in automatic charging management unit for the storage battery, which automatically conducts intelligent equalizing and floating charge management on the battery, greatly extending the service life of the storage battery and making the operation more reliable and safe.

[0031] 5. Intelligent emergency power supply output management and maintenance. It intelligently detects the status of each electrical equipment. After each module completes data storage and function shutdown, it automatically cuts off the emergency power supply output to ensure that the emergency power supply returns to the standby state, and automatically enters the power supply mode when the maintenance personnel start the relevant equipment for on-site fault detection and fault cause analysis.

[0032] The following further elaborates on the present invention in detail in conjunction with the accompanying drawings and specific embodiments. Description of the Drawings

[0033] Figure 1 is the schematic diagram of an embodiment of an intelligent integrated measurement and control unit with emergency power supply management of the present invention.

[0034] Figure 2 is the circuit schematic diagram of the charging management unit in an embodiment of an intelligent integrated measurement and control unit with emergency power supply management of the present invention.

[0035] Figure 3 is the circuit schematic diagram of the emergency power supply output management unit in an embodiment of an intelligent integrated measurement and control unit with emergency power supply management of the present invention.

[0036] Figure 4 is the circuit schematic diagram of the under-voltage alarm circuit in an embodiment of an intelligent integrated measurement and control unit with emergency power supply management of the present invention.

[0037] Figure 5 is the circuit schematic diagram of the alarm input in an embodiment of an intelligent integrated measurement and control unit with emergency power supply management of the present invention.

[0038] Figure 6It is the schematic diagram of the input power supply module in an embodiment of an intelligent integrated measurement and control unit with emergency power supply management according to the present invention. Detailed implementation manners

[0039] An embodiment of an intelligent integrated measurement and control unit with emergency power supply management:

[0040] Refer to Figure 1 An intelligent integrated measurement and control unit with emergency power supply management provided by the present invention is installed in the secondary chamber of an intelligent switch cabinet, and includes: an input power supply module 1, a charging management unit 2, an emergency power supply output management unit 3, a battery module 4, and an intelligent integrated measurement and control unit processor system 5. The intelligent integrated measurement and control unit processor system 5 is respectively connected to the power management unit, the emergency power supply output management unit 3, and the battery module 4. The input end of the charging management unit 2 is connected to the input power supply module 1, and is used to convert the external power supply into a DC power supply and output it to charge the battery module 4 and supply power to each module of the intelligent integrated measurement and control unit. The emergency power supply output management unit 3 is connected to the charging management unit 2, and is used to output an emergency power supply output signal to the charging management unit 2 to manage and control the charging or discharging of the battery module 4.

[0041] When the intelligent integrated measurement and control unit is in a normal power supply state, the emergency power supply output management unit 3 controls the battery module 4 to perform charging management, and converts the external power supply into a DC power supply and outputs it to supply power to each module of the intelligent integrated measurement and control unit; when the intelligent integrated measurement and control unit is in an emergency working state, the emergency power supply output management unit 3 controls the battery module 4 to perform discharging management to supply power to each module of the intelligent integrated measurement and control unit.

[0042] As Figure 2 shown, the charging management unit 2 includes a UC3844 control chip U7, a first linear voltage regulator U2, a second linear voltage regulator U4, a discharge control circuit, and a charging control circuit. The input end of the UC3844 control chip U7 is connected to the external power supply. The UC3844 control chip U7 is connected to the first linear voltage regulator U2. A transformer T3 is connected between the first linear voltage regulator U2 and the second linear voltage regulator U4. The first linear voltage regulator U2 is connected to a secondary winding of the transformer T3. The second linear voltage regulator U4 is connected to another secondary winding of the transformer T3. The output end of the UC3844 control chip U7 is connected to one end of the primary winding of the transformer T3. The other end of the primary winding of the transformer T3 is connected to the discharge control circuit and the charging control circuit.

[0043] In this embodiment, the COMP terminal of the UC3844 control chip U7 is sequentially connected to a triode Q16, a triode Q15, a second optocoupler PC2, and an eighth optocoupler PC8. One output terminal of the second optocoupler PC2 is connected to one output terminal of the eighth optocoupler PC8 and then connected to the COMP terminal of the UC3844 control chip U7. The other output terminal of the second optocoupler PC2 is connected to HGND, and the other output terminal of the eighth optocoupler PC8 is connected to HGND. The base and emitter of the triode Q16 are connected to the base of the triode Q15, the collector of the triode Q16 is connected to HGND, the emitter of the triode Q15 is connected to the COMP terminal of the UC3844 control chip U7, and the collector of the triode Q15 is connected to HGND. The VFB terminal of the UC3844 control chip U7 is connected to a first optocoupler PC1. A resistor R1, a resistor R2, and a capacitor C1 are connected between one output terminal of the first optocoupler PC1 and the VFB terminal of the UC3844 control chip U7. The RT / CT terminal of the UC3844 control chip U7 is connected to a triode Q24. The VCC terminal of the UC3844 control chip U7 is connected to the V+ terminal of the first linear voltage regulator U2. The OUTPUT terminal of the UC3844 control chip U7 is connected to a MOS transistor Q23 and a transformer T2. The gate of the MOS transistor Q23 is connected to the OUTPUT terminal of the UC3844 control chip U7. The drain of the MOS transistor Q23 is connected to the primary winding of the transformer T2. The secondary winding of the transformer T2 is connected to one end of the transformer T3.

[0044] In this embodiment, the discharge control circuit includes a MOS transistor Q28, and the charging control circuit includes a MOS transistor Q29. The source of the MOS transistor Q28 is connected to the drain of the MOS transistor Q29. The gate of the MOS transistor Q28 is connected to a sixth optocoupler PC6 and is connected to a relay K3. Between the drain of the MOS transistor Q28 and the transformer T3, a parallel resistor circuit, a first parallel capacitor circuit, an inductance circuit, and a second parallel capacitor circuit are sequentially connected.

[0045] Among them, the parallel resistor circuit includes resistors R36, R37, R50, and R53 connected in parallel with each other, and resistors R108, R109, R99, and R100 connected in parallel with each other; the first parallel capacitor circuit includes a capacitor C71 and a capacitor C76 connected in parallel with each other; the inductance circuit includes an inductor L4; the second parallel capacitor circuit includes capacitors C90, C99, C88, and C73 connected in parallel with each other.

[0046] Among them, a battery reverse connection protection output circuit is further connected between the gate and source of the MOS transistor Q29 and the battery module 4.

[0047] Such as Figure 3As shown, the emergency power output management unit 3 includes an activation control circuit, an input power loss warning circuit, a battery warning circuit, and an undervoltage warning circuit. The input power loss warning circuit is used to control the input power module 1 to perform discharge management when the power output terminal loses power, so as to supply power to each module of the intelligent integrated measurement and control unit. The activation control circuit is used to perform activation control on the battery module 4. The battery warning circuit is used to output a battery warning signal, and the undervoltage warning circuit is used to output an undervoltage warning signal.

[0048] In this embodiment, the battery warning circuit includes a TL431 voltage regulator U1, a second optocoupler PC2, and a fifth optocoupler PC5. The output terminal of the second optocoupler PC2 is connected to the COMP terminal of the UC3844 control chip U7. One input terminal of the second optocoupler PC2 is connected to one input terminal of the fifth optocoupler PC5. The other input terminal of the fifth optocoupler PC5 is connected to the CA terminal of the TL431 voltage regulator U1.

[0049] In this embodiment, the activation control circuit includes a signal comparator IC2A, a triode Q11, a triode Q19, a triode Q7, a triode Q8, a triode Q18, and a MOS transistor Q27. The inverting input terminal of the signal comparator IC2A is connected to a voltage of 2.5V. The non-inverting input terminal of the signal comparator IC2A is connected to Vo+, and is connected to a relay K1 through a resistor. The output terminal of the signal comparator IC2A is connected to the emitter of the triode Q11. The base of the triode Q11 is connected to a tenth optocoupler PC10. The collector of the triode Q11 is connected to Vo-. The base of the triode Q8 is connected to the emitter of the triode Q11. The emitter of the triode Q8 is connected to the activation signal terminal HK through a resistor and a diode. The collector of the triode Q8 is connected to a fourth optocoupler PC4. One input terminal of the fourth optocoupler PC4 is connected to the collector of the triode Q8. The other input terminal of the fourth optocoupler PC4 is connected to one input terminal of the second optocoupler PC2. The collector of the triode Q8 is connected to the base of the triode Q18. The emitter of the triode Q18 is connected to the gate of the MOS transistor Q27. The collector of the triode Q18 is connected to Vo-. The source of the MOS transistor Q27 is connected to Vo+. The drain of the MOS transistor Q27 is connected to Vo-. The emitter of the triode Q19 is connected to the base and emitter of the triode Q8. The base of the triode Q19 is connected to the collector of the triode Q7. The collector of the triode Q19 is connected to the base of the triode Q7. The emitter of the triode Q7 is connected to Vo-.

[0050] It can be seen that in a power automation system, the equipment in operation requires a reliable backup power supply to ensure that after the main power grid loses power, its secondary intelligent equipment can still operate. Therefore, the reliability requirements for the backup power supply are more prominent. Since the battery uses lead-acid electrolyte material as the energy storage medium, the battery plates will become passivated after long-term operation. Therefore, effective means must be taken to periodically activate and discharge it to extend its service life. An activation start signal can be input to the activation control circuit through the activation signal terminal HK.

[0051] As Figure 4 shown, the under-voltage alarm circuit includes a signal comparator IC2B and a third optocoupler PC3. The inverting input terminal of the signal comparator IC2B is connected with resistors R70, R63, R105, and R41. Resistor R105 is connected to Vo+-5, resistor R70 is connected to Vo+, the non-inverting input terminal of the signal comparator IC2B is connected with resistors R19 and R79, the output terminal of the signal comparator IC2B and an input terminal of the third optocoupler PC3 are connected with resistors R86, R87, and capacitor C24, another input terminal of the third optocoupler PC3 is connected with capacitor C16, and the output terminal of the third optocoupler PC3 is connected with a triode Q5.

[0052] As Figure 6 described, the input power supply module 1 includes a varistor, a capacitor CX1, an inductor L1, and a rectifier bridge DB1. The varistor is connected to the mains power supply. The varistor is connected with the capacitor CX1. The capacitor CX1 is connected to the 1st and 4th terminals of the inductor L1. The 2nd and 3rd terminals of the inductor L1 are connected to the input terminal of the rectifier bridge DB1. The output terminal of the rectifier bridge DB1 is connected to the HV and HGND terminals;

[0053] The input power loss alarm circuit includes a tenth optocoupler PC10 and an eleventh optocoupler PC11. The input terminals of the tenth optocoupler PC10 and the eleventh optocoupler PC11 are connected to the filtering circuit between the 3rd terminal of the inductor L1 and the input terminal of the rectifier bridge DB1. The output terminal of the eleventh optocoupler PC11 is connected with a triode Q3. The base of the triode Q3 is connected to the output terminal of the eleventh optocoupler PC11. The collector of the triode Q3 is connected to the alarm input terminal. The emitter of the triode Q3 is connected to the POK terminal.

[0054] As Figure 5As shown in the figure, a triode Q4 is connected to the output end of the fourth optocoupler PC4. The base of the triode Q4 is connected to the output end of the fourth optocoupler PC4. The collector of the triode Q4 is connected to the alarm input end. The emitter of the triode Q4 is connected to the HOK end. A triode Q5 is connected to the output end of the third optocoupler PC3. The base of the triode Q5 is connected to the output end of the third optocoupler PC3. The collector of the triode Q5 is connected to the alarm input end. The emitter of the triode Q5 is connected to the VL end. A triode Q6 is connected to the output end of the fifth optocoupler PC5. The base of the triode Q6 is connected to the output end of the fifth optocoupler PC5. The collector of the triode Q6 is connected to the alarm input end. The emitter of the triode Q6 is connected to the VL end.

[0055] Specifically, the intelligent integrated measurement and control unit with emergency power output in this embodiment is an integral whole. Each intelligent integrated measurement and control unit is independently installed in the secondary chamber of the switch cabinet and internally includes a charging management unit 2, a battery module 4, an emergency power output management unit 3, and an intelligent integrated measurement and control unit processor system 5. Among them, the measurement and control unit can receive an external power supply of AC220V or DC220V or DC110V for internal power supply and can be converted into an operating power supply of DC24V or DC48V to supply power to the operation circuit of this interval.

[0056] An application method of an intelligent integrated measurement and control unit with emergency power management, which is applied to the above intelligent integrated measurement and control unit with emergency power management for emergency power output management. The method includes the following steps:

[0057] First, when an external power supply is connected, the charging management unit 2 of the intelligent integrated measurement and control unit works normally, charges the battery module 4, and at the same time provides energy to the long-term running load. During energy storage and switching-on and switching-off operations, the battery module 4 provides more load energy requirements. It can be seen that when there is external power, the charging management unit 2 of the intelligent integrated measurement and control unit works normally, charges the battery module 4, and at the same time provides energy to the long-term running load.

[0058] Next, the power supply management system of the intelligent integrated measurement and control unit outputs power externally to provide DC power for related electrical equipment. It can be seen that the power supply management system of the intelligent integrated measurement and control unit outputs power externally to provide DC power for the secondary control circuit, primary switch equipment (such as spring mechanism vacuum circuit breaker, electric load switch, etc.), communication optical terminal, etc.

[0059] When the intelligent integrated measurement and control unit is in the emergency working state, the emergency power output management unit 3 controls the battery module 4 to provide emergency power output for relevant electrical equipment, and the battery module 4 provides energy output. Among them, the emergency working state can be the input power failure emergency state, the activation emergency state, the output undervoltage alarm, and the battery failure alarm. It can be seen that after the external power fails, the intelligent integrated measurement and control unit provides emergency power output for relevant electrical equipment (the length of time depends on the battery capacity), and the battery provides all the energy for the output.

[0060] After the intelligent measurement and control unit detects that the functions of all modules have been processed emergently, and data storage and module operation shutdown are performed, the emergency power output is immediately disconnected, so that the remaining energy of the battery module 4 can be maximally reserved. When the maintenance personnel arrive at the scene for processing, the relevant equipment can be started without external power access, and fault information can be queried and repaired.

[0061] In this embodiment, the battery module 4 is a 48V - 8.8Ah lithium battery, which is fixed at the left bottom position inside the intelligent integrated unit device. Ventilation holes for preventing water ingress are opened on the left and right side walls at the bottom of the intelligent management unit, and a 12V, pwm - controlled chassis fan with a size of 12cm is placed at the right bottom position.

[0062] The charging management unit 2 is a circuit board built into the bottom of the intelligent integrated unit device. Its function is to convert the external power supply of AC220V or DC220V or DC110V input from the side terminals into a power supply of DC48V or DC24V, charge the battery module 4 internally, provide power for the cooling fan, and supply power to the intelligent integrated measurement and control unit module; externally, after passing through the emergency management system, the charging management unit 2 can connect out terminals to provide the operating power supply for this interval, and can provide the energy storage motor and switch lighting for this interval. In addition, the charging management unit 2 has a temperature acquisition function. When the temperature is higher than 45 degrees, it can output pwm to regulate the fan speed, increase the pwm output duty cycle to improve the fan force. When the temperature inside the detection device is higher than 75 degrees, pwm outputs fully. When the temperature is higher than 85 degrees, the charging management unit 2 has overheat protection and shuts down the power supply to the "connected - out terminals" externally. If overheat protection occurs, the charging management unit 2 can transmit the signal to the emergency power output management unit 3. If the charging management unit 2 detects the disappearance of the external input power, it can transmit the signal of the disappearance of the external power supply to the emergency power output management unit 3. When the intelligent integrated measurement and control unit processor system 5 detects that the battery voltage is too low, it will also send the signal of the low voltage of the backup battery to the emergency power output management unit 3; the circuit board of the charging management unit 2 has a relay, which can receive the control of the emergency power output management unit 3, cut off the external power output, or switch the externally output voltage, whether it is to output 24V or 48V, and can also isolate the positive electrode of the lithium battery to turn off the output of the backup power supply.

[0063] The emergency power supply output management unit 3 runs as an application program in the intelligent integrated measurement and control unit system. The emergency power supply output management unit 3 can collect the status variables of the charging management unit 2 and display the current status on the LCD panel of the intelligent integrated measurement and control unit. Through the LCD panel, the status of the charging management unit 2 can be manually adjusted, such as setting the alarm value for low battery voltage, setting the rotation speed of the PWM fan, setting the level of the external output voltage [whether to output 24V or 48V], and the battery voltage can also be obtained from the charging management unit 2 module. When the input power is lost, in order to save the backup power supply, the emergency power supply management system can set two mechanisms to turn off the backup power supply. The first is that the minimum voltage of the backup power supply can be set. If the emergency power supply management system detects that the voltage of the backup power supply is lower than a certain value, it will drive the relay to cut off the positive pole of the power supply, turn off the output, and reserve the power of the backup power supply. The second is that after determining that the power supply of the input end has disappeared, the emergency power supply management system will notify the intelligent integrated measurement and control unit system that the main power supply has disappeared. The intelligent integrated measurement and control unit will collect the current information, voltage information, and switch status of the secondary cabinet connected to this interval at the current moment and store them in the flash, and will also upload the information that the main power supply has disappeared to the background system (if there is a background system). When the intelligent integrated measurement and control unit has completed the information collection, it can notify the emergency power supply management system that the intelligent integrated measurement and control system is ready and the power can be cut off. At this time, the emergency power supply management system will control the relay on the circuit board of the charging management unit 2 to cut off the output of the battery module 4.

[0064] There is a self-resetting button on the panel of the intelligent integrated measurement and control unit. After pressing it, the emergency power supply output management unit 3 will close the relay on the circuit board of the charging management unit 2, making the battery module 4 charged again for the use of the intelligent integrated measurement and control unit device and also making the whole cabinet charged. That is to say, after the operation and maintenance personnel arrive at the site, they can also manually reconnect the secondary-side load. This is convenient for operation and maintenance to repair equipment.

[0065] Thus, compared with the prior art, the present invention has the following advantages:

[0066] Installed dispersedly, it saves floor area and reduces costs. The present invention is directly installed in the instrument box of the intelligent switch cabinet (or the electric operation box of the outdoor device), which can save the floor area of the DC panel. Since the power supply is inside the switch cabinet, the amount of cable used can be reduced, saving the investment in primary equipment and the workload of cable construction; when the total number is not large, its total price is lower than that of the DC panel system, which can reduce the total project cost; at the same time, line loss can be reduced during operation, spare parts can be reduced, and operation costs can be saved. Embedded power supply mode, with greatly improved reliability. Adopting the embedded power supply mode, when a certain circuit fails, the power supply devices of other circuits are not affected, avoiding the situation that there is no operating power supply for the whole station due to a single point of failure. Compared with the centralized power supply DC panel, its overall reliability is greatly improved. Multiple input and output modes, wide application range. It can provide DC outputs of 220V, 110V, 48V, and 24V according to customer needs, and the AC input range is 85 - 265V, which is flexibly applicable to PT and mains power supply. Intelligent management and maintenance, intelligent high-frequency power technology, self-monitoring and self-diagnosis, can be locally displayed and alarmed, and can also be networked for communication to achieve unattended automated remote management. Built-in battery automatic charging management unit 2, which automatically performs intelligent equalizing and floating charge management on the battery, greatly delaying the life of the battery and making the operation more reliable and safe. Intelligent emergency power output management and maintenance, intelligently detecting the status of each electrical equipment. After each module completes data storage and function shutdown, it automatically cuts off the emergency power output to ensure that the emergency power returns to the standby state and automatically enters the power supply mode when the maintenance personnel start the relevant equipment for on-site fault detection and fault cause analysis.

[0067] The above embodiments are only the preferred embodiments of the present invention, and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention belong to the scope of protection required by the present invention.

Claims

1. An intelligent integrated measurement and control unit with emergency power management, characterized in that, Installed in the secondary chamber of the intelligent switch cabinet, it includes: An input power module, a charging management unit, an emergency power output management unit, a battery module, and an intelligent integrated measurement and control unit processor system. The intelligent integrated measurement and control unit processor system is respectively connected to the power management unit, the emergency power output management unit, and the battery module. The input end of the charging management unit is connected to the input power module, and is used to convert the external power supply into a DC power supply and output it to charge the battery module and supply power to each module of the intelligent integrated measurement and control unit. The emergency power output management unit is connected to the charging management unit, and is used to output an emergency power output signal to the charging management unit to manage and control the charging or discharging of the battery module; When the intelligent integrated measurement and control unit is in a normal power supply state, the emergency power output management unit controls the battery module for charging management, and converts the external power supply into a DC power supply and outputs it to supply power to each module of the intelligent integrated measurement and control unit; when the intelligent integrated measurement and control unit is in an emergency working state, the emergency power output management unit controls the battery module for discharging management to supply power to each module of the intelligent integrated measurement and control unit; The emergency power output management unit includes an activation control circuit, an input power loss warning circuit, a battery warning circuit, and an undervoltage warning circuit. The activation control circuit includes a signal comparator, triode Q11, triode Q19, triode Q7, triode Q8, triode Q18, and MOS transistor Q27. The inverting input terminal of the signal comparator is connected to a voltage of 2.5V, the non-inverting input terminal of the signal comparator is connected to Vo+, and is connected to the relay K1 through a resistor. The output terminal of the signal comparator is connected to the emitter of the triode Q11. The base of the triode Q11 is connected with a tenth optocoupler. The collector of the triode Q11 is connected to Vo-. The base of the triode Q8 is connected to the emitter of the triode Q11. The emitter of the triode Q8 is connected to the activation signal terminal HK through a resistor and a diode. The collector of the triode Q8 is connected with a fourth optocoupler. One input terminal of the fourth optocoupler is connected to the collector of the triode Q8, and the other input terminal of the fourth optocoupler is connected to one input terminal of the second optocoupler. The collector of the triode Q8 is connected to the base of the triode Q18. The emitter of the triode Q18 is connected to the gate of the MOS transistor Q27. The collector of the triode Q18 is connected to Vo-. The source of the MOS transistor Q27 is connected to Vo+. The drain of the MOS transistor Q27 is connected to Vo-. The emitter of the triode Q19 is connected to the base and emitter of the triode Q8. The base of the triode Q19 is connected to the collector of the triode Q7. The collector of the triode Q19 is connected to the base of the triode Q7. The emitter of the triode Q7 is connected to Vo-.

2. The intelligent integrated measurement and control unit according to claim 1, wherein: The charging management unit includes a UC3844 control chip, a first linear voltage regulator, a second linear voltage regulator, a discharge control circuit, and a charging control circuit. The input end of the UC3844 control chip is connected to an external power supply. The UC3844 control chip is connected to the first linear voltage regulator. A transformer T3 is connected between the first linear voltage regulator and the second linear voltage regulator. The first linear voltage regulator is connected to a secondary winding of the transformer T3. The second linear voltage regulator is connected to another secondary winding of the transformer T3. The output end of the UC3844 control chip is connected to one end of the primary winding of the transformer T3. The other end of the primary winding of the transformer T3 is connected to the discharge control circuit and the charging control circuit.

3. The intelligent integrated measurement and control unit according to claim 2, wherein: The COMP terminal of the UC3844 control chip is sequentially connected to a triode Q16, a triode Q15, a second optocoupler, and an eighth optocoupler. The VFB terminal of the UC3844 control chip is connected to a first optocoupler. The VCC terminal of the UC3844 control chip is connected to the V+ terminal of the first linear voltage regulator. The OUTPUT terminal of the UC3844 control chip is connected to a MOS transistor Q23 and a transformer T2. The gate of the MOS transistor Q23 is connected to the OUTPUT terminal of the UC3844 control chip. The drain of the MOS transistor Q23 is connected to the primary winding of the transformer T2. The secondary winding of the transformer T2 is connected to one end of the transformer T3.

4. The intelligent integrated measurement and control unit according to claim 2, wherein: The discharge control circuit includes a MOS transistor Q28. The charging control circuit includes a MOS transistor Q29. The source of the MOS transistor Q28 is connected to the drain of the MOS transistor Q29. The gate of the MOS transistor Q28 is connected to a sixth optocoupler and is connected to a relay K3. Between the drain of the MOS transistor Q28 and the transformer T3, a parallel resistor circuit, a first parallel capacitor circuit, an inductance circuit, and a second parallel capacitor circuit are sequentially connected; Wherein, a battery reverse connection protection output circuit is further connected between the gate and the source of the MOS transistor Q29 and the battery module.

5. The intelligent integrated measurement and control unit according to any one of claims 2 to 4, wherein: The input power loss warning circuit is used to control the input power module to perform discharge management when the power input end loses power, so as to supply power to each module of the intelligent integrated measurement and control unit. The activation control circuit is used to perform activation control on the battery module. The battery warning circuit is used to output a battery warning signal. The under-voltage warning circuit is used to output an under-voltage warning signal.

6. The intelligent integrated measurement and control unit according to claim 5, wherein: The battery warning circuit includes a TL431 voltage regulator, a second optocoupler, and a fifth optocoupler. The output terminal of the second optocoupler is connected to the COMP terminal of the UC3844 control chip. One input terminal of the second optocoupler is connected to one input terminal of the fifth optocoupler. The other input terminal of the fifth optocoupler is connected to the CA terminal of the TL431 voltage regulator.

7. The intelligent integrated measurement and control unit according to claim 6, characterized in that: The input power supply module includes a varistor, a capacitor CX1, an inductor L1, and a rectifier bridge DB1. The varistor is connected to the mains power supply. The varistor is connected to the capacitor CX1. The capacitor CX1 is connected to the 1st and 4th terminals of the inductor L1. The 2nd and 3rd terminals of the inductor L1 are connected to the input terminal of the rectifier bridge DB1. The output terminal of the rectifier bridge DB1 is connected to the HV and HGND terminals; The input power loss warning circuit includes a tenth optocoupler and an eleventh optocoupler. The input terminals of the tenth optocoupler and the eleventh optocoupler are connected through a filter circuit between the 3rd terminal of the inductor L1 and the input terminal of the rectifier bridge DB1. The output terminal of the eleventh optocoupler is connected to a triode Q3. The base of the triode Q3 is connected to the output terminal of the eleventh optocoupler. The collector of the triode Q3 is connected to the warning input terminal. The emitter of the triode Q3 is connected to the POK terminal.

8. The intelligent integrated measurement and control unit according to claim 7, characterized in that: The output terminal of the fourth optocoupler is connected to a triode Q4. The base of the triode Q4 is connected to the output terminal of the fourth optocoupler. The collector of the triode Q4 is connected to the warning input terminal. The emitter of the triode Q4 is connected to the HOK terminal; The output terminal of the third optocoupler is connected to a triode Q5. The base of the triode Q5 is connected to the output terminal of the third optocoupler. The collector of the triode Q5 is connected to the warning input terminal. The emitter of the triode Q5 is connected to the VL terminal; The output terminal of the fifth optocoupler is connected to a triode Q6. The base of the triode Q6 is connected to the output terminal of the fifth optocoupler. The collector of the triode Q6 is connected to the warning input terminal. The emitter of the triode Q6 is connected to the VL terminal.

9. An application method of an intelligent integrated measurement and control unit with emergency power management, characterized in that, This method is applied to an intelligent integrated measurement and control unit with emergency power management as described in any one of claims 1 to 8 for emergency power output management. The method includes the following steps: When an external power supply is connected, the charging management unit of the intelligent integrated measurement and control unit works normally, charges the battery module, and at the same time provides energy to the long-term operating load; during energy storage and switching-on and switching-off operations, the battery module provides more load energy requirements; The power supply management system of the intelligent integrated measurement and control unit outputs power externally to provide DC power for related electrical equipment; When the intelligent integrated measurement and control unit is in the emergency working state, the emergency power output management unit controls the battery module to provide emergency power output for related electrical equipment, and the battery module provides energy output; After the intelligent measurement and control unit detects that the functions of all modules have been emergently processed, and data storage and module operation shutdown are performed, the emergency power output is immediately disconnected, so that the remaining energy of the battery module can be maximally retained, and relevant equipment can be started without external power access to query and repair fault information.

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