CN105186695A - AC power supply monitoring device for transformer substation - Google Patents

Abstract

The invention relates to the technical field of AC power monitoring and measurement, and especially relates to an AC power supply monitoring device for a transformer substation. The invention employs the following scheme that the device comprises a device body, a switching value input module which is disposed in the device body and used for detecting the change of a switching value, an analog value collection module for collecting analog data, a display module which is used for displaying parameter data of the switching value input module and the analog value collection module, a communication module for connecting an upper computer, a switching value output module for controlling output, and a core processor which is used for processing data collected by the switching value input module and the analog value collection module and controlling the switching value output module to carry out control output. The core processor is electrically connected with the switching value input module, the analog value collection module, the switching value output module, the communication module, and the display module. The device is advantageous in that the device employs an STM32F103VCT6 embedded microprocessor as the core processor; the device can monitor the state of two power supplies, the state of a bus power supply, a bus current, 30-way switching value input state, 16-way switching value output state, and 2-way ATS logic control output.

Description

A kind of AC power supervising device of transformer station

Technical field

The present invention relates to AC power control measurement field, particularly relate to a kind of AC power supervising device of transformer station.

Background technology

For a long time, in transformer station, supervisory control system or substation management are attention high pressure, and think little of low pressure (380V system), existing technical scheme is:

1, adopt single mother partition supply power mode of two old-fashioned inlet wire one mothers, time normal, each self-operating of two inlet wires, when a road inlet wire has a power failure or overhauls, need close bus.The program adopts automatic or manual operation, even if adopt automatic operation, its response time is many at 2 ~ 3 seconds, causes interruption duration longer, to transformer station control, proterctive equipment can affect.

2, current, more employing double loop power supply inlet wire, uses PC level ATS twin-power switch to make inlet wire switching device, but uses traditional controller.Use the program, switching time reduces greatly, can accomplish in 100mS, but owing to adopting traditional controller, general controller only has single control model, need to determine active and standby inlet wire when wiring, operational flexibility reduces greatly, and communication function is more weak, and the data volume of collection is little.If need meet the demand of digital transformer substation, need increase comprehensive electric quantity collector, switch acquisition device, equipment increases.For the transformer station using IEC61850 communication standard, the program needs to increase more communication apparatus to meet the demands.

Summary of the invention

The object of the present invention is to provide a kind of AC power supervising device of transformer station, concrete is to provide a kind of structure simple and the easily changeable paper towel box with sterilizing function.

For achieving the above object, the present invention adopts following technical scheme: a kind of AC power supervising device of transformer station, comprise device body, be arranged on the switching input module for the change of sense switch amount in device body, for gathering the analogue collection module of analog data, for showing the display module of the supplemental characteristic of described switching input module and analogue collection module, for accessing the communication module of host computer, for controlling the switching value output module exported, for switch amount input module, the data of analogue collection module collection carry out processing and control switch amount output module carries out the core processor that control exports, core processor respectively with switching input module, analogue collection module, switching value output module, communication module, display module is electrically connected, ATS twin-power switch Logic control module is set in core processor.

Further, described analogue collection module comprises busbar voltage and gathers contact, the first primary voltage collection contact, the second primary voltage collection contact, bus current collection contact.

Further, described analogue collection module also comprises the first inlet wire temperature acquisition contact, the second inlet wire temperature acquisition contact.

Further, described switching input module comprises the first lead-in circuit breaker co-bit contact, the second lead-in circuit breaker co-bit contact, locking two-way contact, outside are opened into locking contact.

Further, described switching value output module comprises conjunction first lead-in circuit breaker contact, closes the second lead-in circuit breaker contact, divides the first lead-in circuit breaker contact, divides the second lead-in circuit breaker contact, warning contact.

Further, prepared auto restart is set in described core processor and controls output module, the data control switch amount output module that the switching input module that in processor, prepared auto restart control output module monitors according to processor, analogue collection module gather.

The invention has the advantages that: 1, because transformer station's power supply have employed PC level ATS twin-power switch as main inlet wire, can give full play to the advantage that ATS twin-power switch automatically switches, its fastest switching time is 100mS, much smaller than original technical scheme.

2, owing to have employed STM32F103VCT6 embedded microcontroller as core processor, the state of two-way power supply, bus power supply status, bus current, 30 way switch amount input states can be monitored, export 16 way switch amounts, 3 road ATS logic controls export, this is compared with common Double-power controller, there is monitoring analog quantity complete, control switch amount input and output quantity is many, ATS twin-power switch control model is more complete, can meet various types of user's request.

3, owing to have employed STM32F103VCT6 embedded microcontroller as core processor, local display and communication module can be realized like a cork, particularly realize the requirement adopting IEC61850 communications protocol in digital transformer substation.

Accompanying drawing explanation

Accompanying drawing 1 is a line map of transformer station's AC power supervising device of embodiment;

Accompanying drawing 2 is the system connection layout of the AC power supervising device of embodiment transformer station;

Accompanying drawing 3 is that the AC power supervising device of embodiment transformer station gathers electric current connection layout;

Accompanying drawing 4 is that the AC power supervising device of embodiment transformer station gathers voltage connection layout;

Accompanying drawing 5 is that the AC power supervising device of embodiment transformer station gathers switching value connection layout;

Accompanying drawing 6 is the AC power supervising device output switch parameter connection layout of embodiment transformer station;

Accompanying drawing 7 is the total program flow diagram of AC power supervising device of embodiment transformer station;

Accompanying drawing 8 is AC power supervising device pattern one logical flow chart of embodiment transformer station;

Accompanying drawing 9 is AC power supervising device pattern two logical flow chart of embodiment transformer station;

Accompanying drawing 10 is AC power supervising device pattern three logical flow chart of embodiment transformer station;

Accompanying drawing 11 is AC power supervising device pattern four logical flow chart of embodiment transformer station;

Accompanying drawing 12 is AC power supervising device pattern five logical flow chart of embodiment transformer station;

Embodiment

Embodiment 1: with reference to Fig. 1-6, a kind of AC power supervising device of transformer station, comprise device body, be arranged on the switching input module for the change of sense switch amount in device body, for gathering the analogue collection module of analog data, for showing the display module of the supplemental characteristic of described switching input module and analogue collection module, for accessing the communication module of host computer, for controlling the switching value output module exported, for switch amount input module, the data of analogue collection module collection carry out processing and control switch amount output module carries out the core processor that control exports, core processor respectively with switching input module, analogue collection module, switching value output module, communication module, display module is electrically connected, ATS Logic control module is set in core processor.

Concrete, analogue collection module comprises busbar voltage and gathers contact, first primary voltage gathers contact, second primary voltage gathers contact, bus current gathers contact, analogue collection module also comprises the first inlet wire temperature acquisition contact, second inlet wire temperature acquisition contact, switching input module comprises the first lead-in circuit breaker co-bit contact, second lead-in circuit breaker co-bit contact, locking two-way contact, outside is opened into locking contact, switching value output module comprises conjunction first lead-in circuit breaker contact, close the second lead-in circuit breaker contact, divide the first lead-in circuit breaker contact, divide the second lead-in circuit breaker contact, warning contact.

In the present embodiment, analogue collection module gathers contact by busbar voltage, the first primary voltage gathers contact, the second primary voltage gathers contact, bus current gathers contact and gathers busbar voltage, the first primary voltage, the second primary voltage, bus current value respectively.

Concrete, it is analog input acquisition elements that analogue collection module comprises employing LM324, can be accessed by ZMPT107 voltage transformer that busbar voltage gathers contact, the first primary voltage gathers contact, the second primary voltage gathers the micro voltage that the 220V voltage transitions of contact becomes 0 ~ 5V respectively, after using the process of LM324 four-operational amplifier, feed back to core processor and process.

Access bus current respectively by YTCT102 current transformer and gather micro-electric current that the current conversion of bus current value 5A to be become 0-2.5mA by contact, after using the process of LM324 four-operational amplifier, deliver to core processor and process.

Concrete, be arranged on the first inlet wire cable by analogue collection module, the temperature value signal line collected to be accessed the first inlet wire temperature acquisition contact by the temperature sensor of the second inlet wire cable, the second inlet wire temperature acquisition contact so detect the temperature of the first inlet wire cable, the temperature feedback of the second inlet wire cable processes to core processor, may be used for an inlet wire cable being detected, the cable temperature of the second inlet wire cable locking ATS Logic control module when exceeding certain numerical value in concrete use procedure.

Switching input module adopts 4 74HC244 as On-off signal acquisition elements, input after photoisolator isolation, switch acquisition element is by the first lead-in circuit breaker co-bit contact, second lead-in circuit breaker co-bit contact, locking two-way contact, outside is opened into locking contact, ATS mode bit contact, gather the first lead-in circuit breaker closing position, second lead-in circuit breaker closing position, locking switching state, outside is opened into blocking, ATS mode bit feeds back to core processor and processes, self-defined input contact is also set and monitors self-defining input signal as required.

Switching value output module adopts ULN2803A to be output switch parameter element, under core processor controls, control to export conjunction first lead-in circuit breaker contact by ULN2803A output switch parameter element, close the second lead-in circuit breaker contact, the abnormal contact of point the first lead-in circuit breaker contact, point the second lead-in circuit breaker contact, warning contact, bus, monitor for faults contact, system failure contact, feeder line trip contact, ATS mode bit output contact, also comprise self-defined output contact.

Concrete with reference to Fig. 7-12, core processor carries out logic control by after the supplemental characteristic of collection analogue collection module, switching input module by ATS Logic control module control switch amount output module, the program of program mainly framework, completing of major function completes in subprogram, and the #1 power supply in concrete accompanying drawing 8,9 represents the first inlet wire, #2 power supply represents the second inlet wire.

Above-mentioned ATS mode bit contact comprises: ATS-I, ATS-II position represents that ATS Logic control module closes #1 power supply, closes #2 power supply respectively, and ATS-0 plays position power failure buffer action.

Pattern one is fixing #1 Power supply, has reserved under line errors or other situations, has automatically switched to the situation that pattern three is run.

Pattern two is fixing #2 Power supply, has reserved under line errors or other situations, has automatically switched to the situation that pattern four is run.

Pattern three is that #1 power supply is primary, the operating mode that the second inlet wire is for subsequent use.This pattern for hauling oneself willingly into runback, power on confirm mode of operation or under long-range switching mode Remote Selection " road is preferential "; Actuating logic: main power supply is #1 power supply, and stand-by power supply is #2 power supply, possesses automatic switchover, auto restore facility.Whenever, when #1 power supply is normal, ATS switch closes I position.Only have when #1 abnormity of power supply, when #2 power supply is normal simultaneously, ATS switch closes II position, and recover again normally at #1 power supply, ATS switch closes again in I position.Pattern four, module five are similar with it, pattern four actuating logic: main power supply is #2 power supply, and stand-by power supply is #1 power supply, possesses automatic switchover, auto restore facility.Whenever, when #2 power supply is normal, ATS switch closes II position.Only have when the second inlet wire is abnormal, when #1 power supply is normal simultaneously, ATS switch closes I position, and recover again normally at #2 power supply, ATS switch closes again in II position.Module five is for hauling oneself willingly into the operating mode of not runback, and two-way power supply is only for subsequent use each other.

Certainly, these are only better embodiment of the present invention, not limit the scope of application of the present invention with this, therefore, every make in the principle of the invention equivalence change all should be included in protection scope of the present invention.

Claims (7)

1. the AC power supervising device of a transformer station, comprise device body, be arranged on the switching input module for the change of sense switch amount in device body, for gathering the analogue collection module of analog data, for showing the display module of the supplemental characteristic of described switching input module and analogue collection module, for accessing the communication module of host computer, for controlling the switching value output module exported, it is characterized in that: for switch amount input module, the data of analogue collection module collection carry out processing and control switch amount output module carries out the core processor that control exports, core processor respectively with switching input module, analogue collection module, switching value output module, communication module, display module is electrically connected, ATS Logic control module is set in core processor.

2. the AC power supervising device of a kind of transformer station according to claim 1, is characterized in that: described analogue collection module comprises busbar voltage and gathers contact, the first primary voltage collection contact, the second primary voltage collection contact, bus current collection contact.

3. the AC power supervising device of a kind of transformer station according to claim 1, is characterized in that: described analogue collection module also comprises the first inlet wire temperature acquisition contact, the second inlet wire temperature acquisition contact.

4. the interchange supervising device of a kind of transformer station according to claim 1 or 2 or 3, is characterized in that: described switching input module comprises the first lead-in circuit breaker co-bit contact, the second lead-in circuit breaker co-bit contact, locking two-way contact, outside are opened into locking contact.

5. the interchange supervising device of a kind of transformer station according to claim 1 or 2 or 3, is characterized in that: described switching value output module comprises conjunction first lead-in circuit breaker contact, closes the second lead-in circuit breaker contact, divides the first lead-in circuit breaker contact, divides the second lead-in circuit breaker contact, warning contact.

6. the interchange supervising device of a kind of transformer station according to claim 1 or 2 or 3, it is characterized in that: prepared auto restart is set in described core processor and controls output module, the data control switch amount output module that the switching input module that in processor, prepared auto restart control output module monitors according to processor, analogue collection module gather.

7. the interchange supervising device of a kind of transformer station according to claim 1 or 2 or 3, is characterized in that: described core processor adopts STM32F103VCT6, analogue collection module to adopt LM324 to adopt 74HC244 to adopt ULN2803A as output switch parameter element as On-off signal acquisition elements, switching value output module as analog input acquisition elements, switching input module.