CN1251380C - Intelligent module system for electric distribution and monitor - Google Patents
Intelligent module system for electric distribution and monitor Download PDFInfo
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- CN1251380C CN1251380C CN 01115226 CN01115226A CN1251380C CN 1251380 C CN1251380 C CN 1251380C CN 01115226 CN01115226 CN 01115226 CN 01115226 A CN01115226 A CN 01115226A CN 1251380 C CN1251380 C CN 1251380C
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Abstract
The present invention relates to an intelligent monitoring module system for electric distribution, which is used in an electric power system with the low voltage of 0.4KV. The present invention mainly comprises a main monitoring module, a monitoring module for a capacitance cabinet, a monitoring module for an electric feed cabinet, and a monitoring module for a switching cabinet, wherein communication line interfaces of the monitoring module for a capacitance cabinet, the monitoring module for an electric feed cabinet and the monitoring module for a switching cabinet are connected in parallel to a communication line of a host computer; the communication line of a host computer is connected with the main monitoring module, and is also simultaneously connected in parallel with a monitoring module for a contact cabinet; the monitoring module for a contact cabinet has the same circuit structure as the main monitoring module. The present invention has the characteristics of convenient installation and maintenance, easy failure predication and little investment.
Description
The present invention relates to the employed intelligent power distribution monitoring module of electric power system, particularly a kind of intelligent module system for electric distribution and monitor that uses at the low-voltage power system of 0.4KV.
China's power distribution automation mainly concentrates on 35KV and above distribution system thereof at present, and mainly concentrates on the automation of transformation substations, user's automatic part.And distribution management automation and feeder automation also are in the starting stage, and 10KV-35KV also just concentrates on user's automatic phase, and 400V and also be in the exploratory stage with next.Also there are nearly ten years in China at the research of 10KV and above distribution system automation thereof, successively introduces and develop the supervisory control system that some have use value.For example permitted DASU-2000 and the DA-2000 electrical power distribution automatization system that relay group introduces from Toshiba Corp, the group that permitted to continue also has DANS-298 automation system for the power network dispatching, XWJK-3100 comprehensive automation system of transformer substation, CSC-2000 comprehensive automation system of transformer substation etc., the power distribution supervisory control system that China develops voluntarily is the SM-1 of a Qing Hua Ziguang electric power monitoring system, identify by ministerial level, this system successful operation nearly 10 years.0.4KV the low-pressure system power distribution automation, in the field of business also have corresponding product to be developed out, but adopt a plurality of devices to finish remote measurement, remote signalling, distant control function mostly, and the end product that has has remote measurement, remote signalling function, does not but have distant control function.The user who has in the 400V low-voltage distribution, but exists very big defective with 10KV and above remote terminal module application thereof, and such as the installation and maintenance inconvenience, fault is difficult to judge that shortcomings such as big are invested in bad management.
The objective of the invention is to design a kind of 0.4KV low-voltage intelligent distribution monitor module with remote measurement, remote signalling, distant control function, it has, and installation and maintenance are convenient, and fault judgement is easy, is convenient to management, invests little characteristics.
Technical scheme of the present invention is: design a kind of intelligent module system for electric distribution and monitor, it is characterized in that: it mainly comprises main monitoring module, capacitor box monitoring module, feeder cabinet monitoring module, switches cabinet monitoring module composition; The communication line interface of capacitor box monitoring module, feeder cabinet monitoring module, switching cabinet monitoring module is attempted by on the supervisory computer communication line; Be connected with main monitoring module on the supervisory computer communication line; Described main monitoring module is serially connected on the connection with bus mode, be used for detection and control to incoming line cabinet, receive the data of other module by communication line, and the data that all modules that will comprise incoming line cabinet receive send to supervisory computer, accept management simultaneously and use tricks to calculate the machine monitoring order, the supervisory computer monitor command is sent to corresponding module by communication line, realize that supervisory computer carries out remote detection and control to other module; Described capacitor box monitoring module: be used to finish detection to capacitor box voltage, electric current, power factor, temperature, active power, the switching of the big I automatic or manual control capacitance by power factor, realize the automatic compensation of power factor, real-time display voltage, electric current, power factor, active power and temperature value, and the total data that this module detects is sent main monitoring module or supervisory computer by communication line, to realize the monitoring of main monitoring module or supervisory computer to it; Described feeder cabinet monitoring module: be used to finish feeder cabinet voltage, electric current and bus temperature control, switch or circuit breaker are carried out status detection, real-time display voltage, electric current and temperature value, can long-range or manually control the combined floodgate or the separating brake of 8 way switch or circuit breaker, and the total data of this module is sent to main monitoring module or supervisory computer by communication line, to realize detection and the control of main monitoring module or supervisory computer to it; Described switching cabinet monitoring module: be used to finish to switching the detection of cabinet line voltage, electric current, oily machine (601) voltage, oily machine (602) voltage and bus temperature, in real time demonstration work loop, voltage, electric current and warm bus degree value can long-range or manual control be switched the cabinet switch or circuit breaker carries out civil power-oily machine, oily machine--the switching between the civil power; Provide startup simultaneously, stop the work order of oily machine; And the total data of module is sent to main monitoring module or supervisory computer by communication line, to realize of detection and the control of main monitoring module to it; Described contact cabinet monitoring module: be used to finish detection to the running status of contact cabinet voltage, electric current and bus temperature, circuit breaker, real-time display voltage, electric current and temperature value, can be long-range or manual the combined floodgate or the separating brake of control contact cabinet switch or circuit breaker, when realization system (501) has a power failure, contacted system (502) is powered, otherwise or; Send main monitoring module or supervisory computer by communication with all data of module simultaneously, to realize detection and the control of main monitoring module or supervisory computer to it; Described supervisory computer is existing computer, and it is connected with main monitoring module by communications line.
Described main monitoring module mainly comprises the main treatment circuit of single-chip microcomputer (101) formation, the keyboard circuit that single-chip microcomputer (102) constitutes, a plurality of analog input channel, operational amplifier, A/D converter, I/O expanded circuit, communication line, display circuit, clock circuit, multi-path digital amount imput output circuit, storage circuit composition; It is characterized in that: the main treatment circuit that described single-chip microcomputer (101) constitutes is used for controlling the different analog quantity input timesharing in a plurality of analog input channels and converts digital quantity to through the operational amplifier amplification and through A/D converter, and the digital information of these conversions reads and be stored in the storage circuit by the main treatment circuit that single-chip microcomputer (101) constitutes; Be used for reading the signal of multi-path digital amount input circuit, finish different operations according to the signal of digital quantity input circuit by the I/O expanded circuit; Be used for showing that by I/O expanded circuit control display circuit various analog measurements show; Be used to read the keyboard circuit information that single-chip microcomputer (102) constitutes; Be used for realizing and the communication of other module and the communication of supervisory computer by communication line; Described I/O expanded circuit is made of 74LS573,16V8T and 8255,8255 data/address bus, address bus and control bus are connected with single-chip microcomputer 101, I/O mouth by 8255 provides 8 bit digital quantity input ports, and two delivery outlets, delivery outlet are used to control two relay control ends.
Described a plurality of analog input channel connects voltage transformer, current transformer, temperature sensor, voltage transformer is used to measure the three-phase input ac voltage, current transformer is used to measure the three-phase bus input current, their signal amplifies through operational amplifier (LM324), temperature sensor adopts AD590, amplify through operational amplifier (OP07), amplifying signal is changed through A/D device TLC1543, (89C52) carries out computing by singlechip microprocessor 1, as LCD demonstration, alarm and remote control measurement information; Also be connected with 8250 on the I/O expanded circuit and be used for expansion management computer communication interface, DS12887 is a clock, and 27256 is that outside expansion ROM, 62256 is read-write memory, and LCD240128 is a Chinese-character display, and communication interface adopts RS485, RS232 communication.
Be serially connected on the connection with bus mode owing to main monitoring module among the present invention, be used for detection and control to incoming line cabinet, receive the data of other module by communication line, and the data that all modules that will comprise incoming line cabinet receive send to supervisory computer, accept management simultaneously and use tricks to calculate the machine monitoring order, the supervisory computer monitor command is sent to corresponding module by communication line, realize that supervisory computer carries out remote detection and control to other module; When main monitoring module used as general module, the communication line interface of all modules was attempted by on the interface with the supervisory computer communication line; Main monitoring module only to electric current and voltage, bus temperature, the ambient temperature of incoming line cabinet, monitor by warning information at this moment, and can carry out long-range or manual divide-shut brake control to circuit breaker; When main monitoring module uses as general module, can be used as contact cabinet module and use.It is Chinese-character display that main monitoring module adopts LCD240128, and it manages by the keyboard circuit that single-chip microcomputer 102 constitutes, and establishes three-stage menu ' actions menu, factory's menu, user profile menu ', and factory's menu and factory's menu access to your password and enter.' the actions menu password can be changed at actions menu, and factory's menu password can be changed at factory's menu '.
The present invention's characteristics compared to the prior art are:
The domestic industry that requires low-voltage power centralized monitor and scheduling as postal service, telecommunications, move etc., mainly utilize following several method to set up LV Distribution Monitoring System: 1, adopting the PLC programmable controller is that far-end unit, PC are that data concentrator is formed system, shortcomings such as the programming amount is big, the quadratic transformation element is many but exist, and reliability is relatively poor relatively.2, utilize ABB, SCHNIDLER company low voltage switchgear to carry intelligent cell, data concentrator and PC and form system, but exist the huge shortcoming of investment.3, utilize the module that possesses data operation function and digital switch quantity output function to form system, but be unfavorable for system extension and data centralization.China's success first low pressure 400V distributing monitoring system to be applied to actual be the Beijing West Railway Station LV Distribution Monitoring System, the system configuration of this supervisory control system, hardware designs, communication acquisition are applied to the nineties advanced person's PROFIBUS field bus technique, what SCADA software adopted is to organize too king, but its remotely intelligently monitoring module, magnificent product is ground in employing Taiwan, the man-machine interaction performance is poor.
The present invention has following characteristics:
1, utilize the intelligent power distribution monitoring module to form the 0.4KV LV Distribution Monitoring System with several different methods, realization to low-voltage distribution system take remote measurement, remote signalling, remote control, monitor low-voltage distribution and equipment running status in real time, record and processing related data, in time detect fault, notify personnel to handle, thereby realize the few people or the unattended duty at low-voltage distribution station.
2, the electrical instrument of alternative conventional low switchgear assembly, master switch, signal lamp, alarm etc. make the card integration.
3, the intelligent power distribution monitoring module adopts the complete Chinese demonstration of large-screen LCD, LED and keyboard to constitute man-machine interface, and the man-machine interaction performance is good.With acousto-optic auditory visual signal, and record trouble reason and time, failure logging can be consulted during to faults such as communicating interrupt, circuit breaker and electrical quantity Threshold Crossing Alert.
4, the installation of module does not influence the operate as normal and the original function of monitored device, does not influence the grounding system of monitored device yet.
5, module is used in the 0.4KV electric power system, and its input and output do not need external quadratic transformation element and isolate components and parts, and the fault point is few; The function of module and the function of low-voltage complete switch equipment have consistency simultaneously, and failure judgement is easy to maintenance easily.
6, module has self-diagnostic function, can recover automatically interference such as data disorder, communication and electromagnetism.
7, the unit cost of module has the little characteristics of system's investment not as good as 3000 yuans.
The present invention will be further described below in conjunction with the embodiment accompanying drawing:
Fig. 1 is embodiment 1 communication interface figure.
Fig. 2 is main monitoring module circuit diagram.
Fig. 3 is a capacitor box monitoring module circuit diagram.
Fig. 4 is a feeder cabinet monitoring module FRTU-8 circuit diagram.
Fig. 5 is a feeder cabinet monitoring module FRTU-2 circuit diagram.
Fig. 6 is that power supply switches cabinet monitoring module circuit diagram.
Fig. 7 is a contact cabinet monitoring module circuit diagram.
Fig. 8 is embodiment 2 communication interface figure.
Among the figure: 1, main monitoring module circuit 2, capacitor box monitoring module circuit 3, feeder cabinet monitoring module 4, power supply switch cabinet monitoring module 5, contact cabinet monitoring module.
Fig. 1 is embodiment 1 communication interface figure, as shown in Figure 1: in embodiment 1 by main monitoring cabinet module 1, feeder cabinet monitoring module 3, power supply switches cabinet module 4, capacitor compensation cabinet module 2, totally six kinds of modules of contact cabinet module 5 five classes connect to form, main monitoring module 1 with bus mode with feeder cabinet monitoring module 3, power supply switches cabinet module 4, capacitor compensation cabinet module 2, contact cabinet module 5 is electrically connected, on the unit bus, a main monitoring cabinet module 1 can be hung 14 subordinate's modules at most: feeder cabinet monitoring module 3, power supply switches cabinet module 4, capacitor compensation cabinet module 2, contact cabinet module 5.It can be realized:
1, remote measurement: the intelligent power distribution monitoring module is supported the electric parameters such as three-phase voltage, three-phase current, active power, power factor, power distribution cabinet bus temperature and operating ambient temperature of remote monitoring low-voltage distribution system.
2, remote signalling: the intelligent power distribution monitoring module is supported the running status of each circuit breaker of telemonitoring low-voltage distribution system, under-voltage, overvoltage to system, sound and light alarm is carried out in circuit breaker overcurrent, tripping operation and power factor, operating ambient temperature, the off-limit alarm of busbar temperature, and record warning reason, fault time and fault point.
3, remote control: the support of intelligent power distribution monitoring module is long-range carries out branch, closing operation control to each circuit breaker of low-voltage distribution system.
Fig. 2 is main monitoring module circuit diagram, and as shown in Figure 2: main monitoring module 1 mainly comprises the main treatment circuit of single-chip microcomputer 101 formations, the keyboard circuit that single-chip microcomputer 102 constitutes, a plurality of analog input channel, operational amplifier, A/D converter, I/O expanded circuit, communication line, display circuit, clock circuit, multi-path digital amount imput output circuit, storage circuit composition; The main treatment circuit that wherein said single-chip microcomputer 101 constitutes is used for controlling the different analog quantity input timesharing in a plurality of analog input channels and converts digital quantity to through the operational amplifier amplification and through A/D converter, and the digital information of these conversions reads and be stored in the storage circuit by the main treatment circuit that single-chip microcomputer 101 constitutes; Be used for reading the signal of multi-path digital amount input circuit, finish different operations according to the signal of digital quantity input circuit by the I/O expanded circuit; Be used for showing that by I/O expanded circuit control display circuit various analog measurements show; Be used to read the keyboard circuit information that single-chip microcomputer 102 constitutes; Be used for realizing and the communication of other module and the communication of supervisory computer by communication line; Described I/O expanded circuit is made of 74LS573,16V8T and 8255,8255 data/address bus, address bus and control bus are connected with single-chip microcomputer 101, I/O mouth by 8255 provides 8 bit digital quantity input ports, and two delivery outlets, delivery outlet are used to control two relay control ends.A plurality of analog input channels connect voltage transformer, current transformer, temperature sensor, voltage transformer is used to measure the three-phase input ac voltage, current transformer is used to measure the three-phase bus input current, their signal amplifies through operational amplifier (LM324), temperature sensor adopts AD590, amplify through operational amplifier (OP07), amplifying signal is changed through A/D device TLC1543, (89C52) carries out computing by singlechip microprocessor 101, as LCD demonstration, alarm and remote control measurement information.Also be connected with 8250 in addition on the I/O expanded circuit and be used for expansion management computer communication interface, DS12887 is a clock, 27256 is that outside expansion ROM, 62256 is read-write memory, and LCD240128 is a Chinese-character display, and communication interface adopts RS485, RS232 communication.Relevant voltage, current transformer picked up signal are passed through in the collection of input AC amount (alternating voltage, alternating current), amplify and have former rate ripple to obtain A/D through operational amplifier (LM324) and change input voltage.The collection of temperature is by integrated temperature sensor (AD590), amplifies and calibration acquisition A/D conversion input voltage through operational amplifier (OP07).A/D converter (TLC1543) converts the analog quantity of input to digital quantity, and (89C52) carries out computing by singlechip microprocessor 101, as LCD demonstration, alarm and remote control measurement information.Digital quantity (switching signal) is directly read in switching signal by input and output parallel interface (8255).By singlechip microprocessor 101 (89C52) analyzing and processing, as the display message of on off state and the information condition of control switch (circuit breaker) action.The combined floodgate of switch, separating brake adopt the motor of relay control response to realize.8250 are used for expansion management computer communication interface in addition, and DS12887 is a clock, and 27256 is that outside expansion ROM, 62256 is read-write memory, and LCD240128 is a Chinese-character display.Characteristics such as power supply adopts Switching Power Supply, and it is little to have a volume, and voltage stabilized range is wide.Different circuit has been adopted corresponding protection circuit; And adopted corresponding anti-interference method.Accuracy, the reliability and stability of module work have been improved.
Mainly according to the functional requirement of module, the combined with hardware circuit adopts assembler language to programme in the design of software (program).Be divided into work main program, display routine and communication program three parts.Main control module 1 is the main control module of whole system, except finishing detection and control to incoming line cabinet, on the one hand by communication is finished other module data is collected and remote control, also to send supervisory computer the data of all modules that comprise incoming line cabinet on the other hand, and accept management and use tricks to calculate the machine monitoring order, to realize detection and the control of supervisory computer to each module.
Its input and output specification requirement:
Use power supply: exchange: 220V-10%～-15% 50Hz.
The module input variable:
The three-phase input ac voltage is measured: UA, UB, UC:0-300Vac-10%～-15%, precision ± 0.5%.
Three-phase bus input current (current transformer output): IA, IB, IC:0～5A, precision ± 0.5%.
Busbar temperature test scope :-10～80 ℃
Ambient temperature test specification :-10～80 ℃
8 road digital quantities input: passive switch amount
Module controls output variable: two-way relay switch, contact capacity: voltage 220VAC-10%～-15%, electric current: 8A.Communication interface:
RS485 is used for the supervisory computer communication, the MB agreement, and transmission rate 2.4～19.2K makes twisted-pair cable.
RS485 is used for the module communication with RTU, the MB agreement, and transmission rate 2.4K uses twisted-pair cable.
Main monitoring module has following function:
(1) Chinese backlight LCD liquid crystal display, normality backlight is gone out, backlight lightening when button or incident take place.
(2) green relay indicating light, red alarm indicator and yellow power supply indicator of band LED.
(3) band sound alarm, alarm event have corresponding information to show when taking place.
(4) establish three-stage menu ' actions menu, factory's menu, user profile menu ', factory's menu and factory's menu access to your password and enter.The actions menu password can be changed at actions menu, and factory's menu password can be in factory's menu change.
(5) liquid crystal display content during operate as normal: voltage, electric current, bus temperature, when alarm occurring, but display alarm content and alarm time started.
(6) when mains failure, contact cabinet II road civil power can be switched to power distribution cabinet.
(7) RS232 and RS485 communication interface and system effectively isolate.
(8) alarm main contents: mains supply over-voltage, civil power is under-voltage, phase shortage alarm, overload, short circuit, ambient temperature and bus temperature are out-of-limit.
(9) except the input/output signal interface RS232, MST2,5-ST5,08 plug and MSTBU2, the 5-G5,08 socket that adopt PHOENZX company to produce.
(10) user profile menu:
A, alarm, alarm reset and change the record of setting operation.
Information such as B, the voltage that shows each power distribution cabinet loop, electric current, temperature, switch and alarm.
C, memory body can be deposited alarm, and alarm resets and changes 128 of information such as be provided with.
(11) actions menu:
A, the retouching operation password is set.
B, manual mode of operation is set.
C, long-range/control mode on the spot is set.
D, each power distribution cabinet switch is controlled.
(12) factory's menu
A, be provided with and revise factory's password.
B, the kind that power distribution cabinet is set, quantity;
C, the address of RTU is set;
D, show each phase line voltage, electric current, bus temperature, state.
E, current range and alarming threshold are set.
F, calibration.
Fig. 3 is a capacitor box monitoring module circuit diagram, and as shown in Figure 3: capacitor box monitoring module 2 mainly comprises the main treatment circuit of single-chip microcomputer 201 formations, the keyboard circuit that single-chip microcomputer 202 constitutes, a plurality of analog input channel, operational amplifier, A/D converter, I/O expanded circuit, communication line, display circuit, multi-path digital amount imput output circuit composition; The main treatment circuit that wherein said single-chip microcomputer 201 constitutes is used for controlling the different analog quantity input timesharing in a plurality of analog input channels and converts digital quantity to through the operational amplifier amplification and through A/D converter, and the digital information of these conversions reads and be stored in the storage circuit by the main treatment circuit that single-chip microcomputer 201 constitutes; Be used for reading the signal of multi-path digital amount input circuit, finish different operations according to the signal of digital quantity input circuit by the I/O expanded circuit; Be used for showing that by I/O expanded circuit control display circuit various analog measurements show; Be used to read the keyboard circuit information that single-chip microcomputer 202 constitutes; Be used for by the communication of communication line realization with main monitoring module; Described I/O expanded circuit is made of 74LS573,16V8T, on the I/O expanded circuit, be connected with 8255,74HC573, LCD display, the output of 12 way switch amounts is provided and drives relay, the work of control capacitance cabinet contactor by 8255 by UNL2803, with the input that realizes electric capacity or withdraw from, provide the input of 12 road digital quantities by 74HC573.A plurality of analog input channels connect voltage transformer, current transformer, temperature sensor, voltage transformer is used to measure the three-phase input ac voltage, current transformer is used to measure the three-phase bus input current, their signal amplifies through operational amplifier (LM324), temperature sensor adopts AD590, amplifies through operational amplifier (OP07), and amplifying signal is changed through A/D device TLC1543, (89C52) carries out computing by single-chip microcomputer 201, as LCD demonstration, alarm and remote control measurement information.The communication interface of capacitor box monitoring module 2 is connected the communication of RS485 realization and main monitoring module by single-chip microcomputer 201 (89C52).The collection of input AC amount (alternating voltage, alternating current) obtains A/D conversion input ac voltage by relevant voltage, current transformer picked up signal through operational amplifier (OP07) amplification and sampling hold circuit.The collection of temperature is by integrated temperature sensor (AD590), amplifies and calibration acquisition A/D conversion input voltage through operational amplifier (OP07).A/D converter (TLC1543) converts the analog quantity of input to digital quantity, and (89C52) carries out computing by singlechip microprocessor 1, as LCD demonstration, alarm and remote control measurement information.Digital quantity (switching signal) is directly read in switching signal by address latch (74HC573).By singlechip microprocessor 1 (89C52) analyzing and processing, as the display message of on off state.Output drives relay, the work of control capacitance cabinet contactor by 8255 delivery outlets and UNL2803, with the input that realizes electric capacity or withdraw from.Keyboard operation and management are realized by singlechip microprocessor 202 (89C2051).
Mainly according to the functional requirement of module, the combined with hardware circuit adopts assembler language to programme in the design of software (program).Be divided into work main program, display routine and communication program three parts.Capacitor box monitoring module 2 is finished the detection to capacitor box voltage, electric current, power factor, meritorious effect, the switching of the big I by power factor automatic (or manually) control capacitance, realize the automatic compensation of power factor, the time real display voltage, electric current, power factor, active power and temperature value, and send main monitoring module 1 or host computer with the total data of module by communication, to realize the detection of main monitoring module 1 or supervisory computer to it.
Its input and output specification requirement:
Use power supply: exchange: 220V-10%～-15% 50Hz.
The module input variable:
The three-phase input ac voltage is measured: UAB, UCB:0-300 VAC-10%～-15%, precision ± 0.5%.
Two-phase bus input current (current transformer output): IA, IC:0～5A, precision ± 0.5%.
Busbar temperature test scope :-10～80 ℃
12 road digital quantities inputs (contactless contactor amount)
Module controls output variable: No. 12 relay switches, contact voltage 220VAC-10%～-15%, electric current: 8A.
Communication interface: RS485 is used for the communication between MPMU module or the supervisory computer, the MB agreement, and transmission rate 2.4～19.2K uses twisted-pair feeder.
Its major function requires:
(1) Chinese backlight LCD liquid crystal display, normality backlight is gone out, backlight lightening when button or incident take place.
(2) green relay indicating light, red alarm indicator and yellow power supply indicator of band LED.
(3) band sound alarm, alarm event have corresponding information to show when taking place.
(4) establish three-stage menu ' actions menu, factory's menu, user profile menu ', factory's menu and factory's menu access to your password and enter.The actions menu password can be changed at actions menu, and factory's menu password can be in factory's menu change.
(3) liquid crystal display content, voltage, electric current, power factor, active power, bus temperature during operate as normal, when alarm occurring, but the display alarm content.
(4) actions menu
The retouching operation password is set.
A, manual mode of operation is set.
B, manually control.
(7) factory's menu
A, be provided with and revise factory's password.
B, automatic compensation power factor is set;
C, current range and alarming threshold are set.
D, calibration.
Fig. 4 is a feeder cabinet monitoring module FRTU-8 circuit diagram, as shown in Figure 4, capacitor box monitoring module 2 among feeder cabinet monitoring module 3 and Fig. 2 has similar structures, on the I/O expanded circuit, be connected with 8255,74HC573, LCD display, 74HC238, provide the input of 16 way switch amounts by 8255,16 way switch amounts output is provided by 74HC238, and 74HC238 output drives relay by UNL2803, realizes closing and dividing of switch.The collection of input AC amount (alternating voltage, alternating current) obtains A/D conversion input voltage by relevant voltage, current transformer picked up signal through operational amplifier (LM324) amplification and active power filtering.The collection of temperature is by integrated temperature sensor (AD590), amplifies and calibration acquisition A/D conversion input voltage through operational amplifier (OP07).A/D converter (TLC1543) converts the analog quantity of input to digital quantity, and (89C52) carries out computing by singlechip microprocessor 301, as LCD demonstration, alarm and remote control measurement information.The parallel input/output interface (8255) of digital quantity (switching signal) directly reads in switching signal.By singlechip microprocessor 301 (89C52) analyzing and processing, as the display message of on off state and the foundation of control switch action.Output drives relay, the work of control capacitance cabinet contactor by 8255 delivery outlets and UNL2803, with the input that realizes electric capacity or withdraw from.Keyboard operation and management are realized by singlechip microprocessor 302 (89C2051).Output drives relay, controller work by 74H,238 three-eight decoding latchs and UNL2803, to realize the combined floodgate or the separating brake of switch.
Mainly according to the functional requirement of module, the combined with hardware circuit adopts assembler language to programme in the design of software (program).Be divided into work main program, display routine and communication program three parts.
Fig. 5 is a feeder cabinet monitoring module FRTU-2 circuit diagram, Fig. 5 and Fig. 4 structure are basic identical, just in Fig. 5, be connected with 74HC573, LCD display, 74HC238 on the I/O expanded circuit, provide the input of 10 way switch amounts by 74HC573, the output of 4 way switch amounts is provided by 74HC238, and 74HC238 output drives relay by UNL2803.
Fig. 6 is that power supply switches cabinet monitoring module circuit diagram, Fig. 6 and Fig. 5 circuit also are basic identical, in Fig. 6, when just providing the input of 10 way switch amounts by 74HC573, it is connected with city UA simultaneously, whether oil U1-2-optocoupler 521 is used to monitor supply power voltage normal, power supply switches cabinet monitoring module 4 to be finished switching the cabinet line voltage, electric current, oil machine 601 voltages, the detection of oil machine 602 and bus temperature, show the operating voltage loop in real time, voltage, electric current and bus temperature value, can long-range (or manually) control switch cabinet switch (circuit breaker) and carry out civil power--oily machine, oil machine--the switching between the civil power; Provide startup simultaneously, stop the work order of oily machine; And send MPMU module or supervisory computer with the total data of module by communication, to realize detection and the control of MPMU module or supervisory computer to it.Communication interface: RS485 is used for the communication between MPMU module or the supervisory computer, the MB agreement, and transmission rate 2.4～19.2K uses twisted-pair feeder.
Fig. 7 is a contact cabinet monitoring module circuit diagram, in Fig. 7, be connected with 74HC573, LCD display, 74HC238 on the I/O expanded circuit, provide the input of 5 way switch amounts by 74HC573, provide the output of 4 way switch amounts by 74HC2384, the 4 way switch amounts output that 74HC2384 provides drives 4 relays by integrated circuit UNL2803.
Contact cabinet monitoring module can also replace with main monitoring module MPMU, but the program of main monitoring module will change at this moment, and just hardware is constant.
Contact cabinet monitoring module is finished the detection to contact cabinet voltage, electric current and bus temperature, real-time display voltage, electric current and temperature value, automatically the combined floodgate or the separating brake of cabinet switch (circuit breaker) got in touch with in (or manually) control, when realization system 501 has a power failure, on the contrary automatically contacted system 502 power or.And send MPMU module with the switch data of module by communication, to realize of detection and the control of MPMU module to it.Communication interface: adopt simple data manner of comparison and MPMU1 and MPMU2 module to set up communication.Major function requires identical with FRTU-8.
Fig. 8 utilizes the monitoring unit intelligent power distribution monitoring module that constitutes to form the another kind of mode of low-voltage distribution monitoring unit: at this moment the MPMU module is used as general module, all modules all are articulated on the bus, module number is unrestricted in principle, and scalability is good.And each module all can be used separately.
The supervisory computer that defines among the present invention is existing computer in addition, and it is connected with main monitoring module by communications line.
Claims (3)
1, a kind of intelligent module system for electric distribution and monitor is characterized in that: it mainly comprises main monitoring module, capacitor box monitoring module, feeder cabinet monitoring module, switches cabinet monitoring module composition; The communication line interface of capacitor box monitoring module, feeder cabinet monitoring module, switching cabinet monitoring module is attempted by on the supervisory computer communication line; Be connected with main monitoring module on the supervisory computer communication line; Described main monitoring module is serially connected on the connection with bus mode, be used for detection and control to incoming line cabinet, receive the data of other module by communication line, and the data that all modules that will comprise incoming line cabinet receive send to supervisory computer, accept management simultaneously and use tricks to calculate the machine monitoring order, the supervisory computer monitor command is sent to corresponding module by communication line, realize that supervisory computer carries out remote detection and control to other module; Described capacitor box monitoring module: be used to finish detection to capacitor box voltage, electric current, power factor, temperature, active power, the switching of the big I automatic or manual control capacitance by power factor, realize the automatic compensation of power factor, real-time display voltage, electric current, power factor, active power and temperature value, and the total data that this module detects is sent main monitoring module or supervisory computer by communication line, to realize the monitoring of main monitoring module or supervisory computer to it; Described feeder cabinet monitoring module: be used to finish feeder cabinet voltage, electric current and bus temperature control, switch or circuit breaker are carried out status detection, real-time display voltage, electric current and temperature value, can long-range or manually control the combined floodgate or the separating brake of 8 way switch or circuit breaker, and the total data of this module is sent to main monitoring module or supervisory computer by communication line, to realize detection and the control of main monitoring module or supervisory computer to it; Described switching cabinet monitoring module: be used to finish to switching the detection of cabinet line voltage, electric current, oily machine (601) voltage, oily machine (602) voltage and bus temperature, in real time demonstration work loop, voltage, electric current and warm bus degree value can long-range or manual control be switched cabinet switch or circuit breaker and are carried out switching between civil power one oily machine, oily machine one civil power; Provide startup simultaneously, stop the work order of oily machine; And the total data of module is sent to main monitoring module or supervisory computer by communication line, to realize of detection and the control of main monitoring module to it; Described contact cabinet monitoring module: be used to finish detection to the running status of contact cabinet voltage, electric current and bus temperature, circuit breaker, real-time display voltage, electric current and temperature value, can be long-range or manual the combined floodgate or the separating brake of control contact cabinet switch or circuit breaker, when realization system (501) has a power failure, contacted system (502) is powered, otherwise or; Send main monitoring module or supervisory computer by communication with all data of module simultaneously, to realize detection and the control of main monitoring module or supervisory computer to it; Described supervisory computer is existing computer, and it is connected with main monitoring module by communications line.
2, a kind of intelligent module system for electric distribution and monitor according to claim 1, it is characterized in that: described main monitoring module mainly comprises the main treatment circuit that single-chip microcomputer (101) constitutes, the keyboard circuit that single-chip microcomputer (102) constitutes, a plurality of analog input channels, operational amplifier, A/D converter, the I/O expanded circuit, communication line, display circuit, clock circuit, multi-path digital amount imput output circuit, storage circuit is formed, it is characterized in that: the main treatment circuit that described single-chip microcomputer (101) constitutes is used for controlling the different analog quantity input timesharing in a plurality of analog input channels and converts digital quantity to through the operational amplifier amplification and through A/D converter, and the digital information of these conversions reads and be stored in the storage circuit by the main treatment circuit that single-chip microcomputer (101) constitutes; Be used for reading the signal of multi-path digital amount input circuit, finish different operations according to the signal of digital quantity input circuit by the I/O expanded circuit; Be used for showing that by I/O expanded circuit control display circuit various analog measurements show; Be used to read the keyboard circuit information that single-chip microcomputer (102) constitutes; Be used for realizing and the communication of other module and the communication of supervisory computer by communication line; Described I/O expanded circuit is made of 74LS573,16V8T and 8255,8255 data/address bus, address bus and control bus are connected with single-chip microcomputer 101, I/O mouth by 8255 provides 8 bit digital quantity input ports, and two delivery outlets, delivery outlet are used to control two relay control ends.
3, a kind of intelligent module system for electric distribution and monitor according to claim 4, it is characterized in that: described a plurality of analog input channels connect voltage transformer, current transformer, temperature sensor, voltage transformer is used to measure the three-phase input ac voltage, current transformer is used to measure the three-phase bus input current, their signal amplifies through operational amplifier (LM324), temperature sensor adopts AD590, amplify through operational amplifier (OP07), amplifying signal is changed through A/D device TLC1543, (89C52) carries out computing by singlechip microprocessor 1, shows as LCD, alarm and remote control measurement information; Also be connected with 8250 on the I/O expanded circuit and be used for expansion management computer communication interface, DS12887 is a clock, and 27256 is that outside expansion ROM, 62256 is read-write memory, and LCD240128 is a Chinese-character display, and communication interface adopts RS485, RS232 communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01115226 CN1251380C (en) | 2001-04-17 | 2001-04-17 | Intelligent module system for electric distribution and monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01115226 CN1251380C (en) | 2001-04-17 | 2001-04-17 | Intelligent module system for electric distribution and monitor |
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| CN1313667A CN1313667A (en) | 2001-09-19 |
| CN1251380C true CN1251380C (en) | 2006-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01115226 Expired - Fee Related CN1251380C (en) | 2001-04-17 | 2001-04-17 | Intelligent module system for electric distribution and monitor |
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| Country | Link |
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| CN (1) | CN1251380C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101059692B (en) * | 2007-04-30 | 2011-06-01 | 深圳日海通讯技术有限公司 | Integrated monitoring system integration |
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| AU2003216397A1 (en) | 2002-02-25 | 2003-09-09 | General Electric Company | Electrical protection system for reliability improvement based on sensitivity analysis |
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| CN103545920A (en) * | 2013-09-24 | 2014-01-29 | 池州市华强高低压电器成套设备有限公司 | Protecting and controlling method for power distribution box |
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| CN113009850B (en) * | 2021-03-07 | 2022-06-07 | 广东电网有限责任公司广州供电局 | Intelligent operation method and device for low-voltage contact cabinet |
-
2001
- 2001-04-17 CN CN 01115226 patent/CN1251380C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101059692B (en) * | 2007-04-30 | 2011-06-01 | 深圳日海通讯技术有限公司 | Integrated monitoring system integration |
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| Publication number | Publication date |
|---|---|
| CN1313667A (en) | 2001-09-19 |
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