CN109596880A - One kind being based on substation's alternating current-direct current down Monitor Unit system and monitoring method - Google Patents
One kind being based on substation's alternating current-direct current down Monitor Unit system and monitoring method Download PDFInfo
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- CN109596880A CN109596880A CN201811436902.4A CN201811436902A CN109596880A CN 109596880 A CN109596880 A CN 109596880A CN 201811436902 A CN201811436902 A CN 201811436902A CN 109596880 A CN109596880 A CN 109596880A
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- Prior art keywords
- direct current
- voltage
- substation
- current
- control module
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
Abstract
The invention discloses one kind to be based on substation's alternating current-direct current down Monitor Unit system and monitoring method, the voltage and current and threshold comparison of direct current cabinet DC voltage acquisition module and the acquisition of direct current cabinet charging and discharging currents acquisition module are received using monitoring control module, if acquisition voltage and current and threshold comparison at least one be lower than threshold value, then alarm, independently of transformer station direct current system, applied in substation's ac and dc systems, pass through charging and discharging currents size direction and direct current cabinet end DC voltage between acquisition battery and fuse；Monitoring charger can thus be played whether normal operation, whether battery fuse RD fuses, to judge whether whole direct current system works normally, it can judge whether battery and bus thread off in time, charger is whether normal operation, by passive switch amount output abnormality signal to comprehensive from backstage, can effectively monitoring substation direct current system whether work normally.
Description
Technical field
The invention belongs to the technical fields of substation's alternating current-direct current power down Online Transaction Processing research, are specifically related to a kind of base
In substation's alternating current-direct current down Monitor Unit system and monitoring method.
Background technique
Transforming plant DC power-supply system is one of mostly important system of substation, predominantly automatic device, switch control, thing
Therefore the equipment such as illumination, system monitoring are powered, safe and stable operation is that can relay protection and automatic device reliably correctly act
Precondition.
In DC power system operational process, exists there is a situation where the power down of AC and DC power supply and cannot find in time, easily
Relay protection and automatic device tripping is caused to bring to cause the hidden danger of fault spread to safe and stable operation of power system
Grave danger.
Summary of the invention
The purpose of the present invention is to provide one kind to be based on substation's alternating current-direct current down Monitor Unit system and monitoring method, to overcome
The deficiencies in the prior art.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
One kind being based on substation's alternating current-direct current down Monitor Unit system, including monitors control module and connect with monitoring control module
The direct current cabinet DC voltage acquisition module and direct current cabinet charging and discharging currents acquisition module connect, direct current cabinet DC voltage acquisition module and
Direct current cabinet charging and discharging currents acquisition module is big for acquiring DC voltage and charging and discharging currents between battery and fuse respectively
Small direction；Monitoring control module receives direct current cabinet DC voltage acquisition module and direct current cabinet charge and discharge electricity for storing threshold value
The voltage and current and threshold comparison of acquisition module acquisition are flowed, if at least one is low with threshold comparison for the voltage and current of acquisition
It in threshold value, then alarms, does not otherwise alarm.
It further, further include the output-controlling device being connect with monitoring control module, output-controlling device connection monitoring
The output end of control module, monitoring control module export the peak that reversely disappears through diode and the alarm of relay output voltage and electric current are sent to accuse
Alert signal.
It further, further include display panel module, power module and the clock circuit being connect with monitoring control module, display
Control module P mouthfuls of connection of panel module serial ports 128X64 liquid crystal display and monitoring；Monobus numeric keypad is pulled up through pull-up resistor, defeated
Enter to control module key mouthfuls of monitoring；Power module provides the reliable source of power of system work, and system is inputed to after capacitor filtering；
Clock circuit provides the clock of system work and the time of logout, for judging that the time-event of power down records.
Further, monitoring control module uses the single-chip microcontroller of STC8A8K64S4A12.
A kind of substation's alternating current-direct current down Monitor Unit method of monitoring system passes through charge and discharge between acquisition battery and fuse
Electric size of current direction and DC voltage, if DC voltage value is less than battery total voltage threshold value or charging and discharging currents are less than
Floating current threshold value then carries out early warning, judges substation's alternating current-direct current power down, breaks down, otherwise without early warning.
Further, floating current threshold value is 1-3mA/Ah.
Further, battery total voltage threshold value is 0.05 times of battery pack joint number.
Compared with prior art, the invention has the following beneficial technical effects:
It is of the invention a kind of based on substation's alternating current-direct current down Monitor Unit system, including monitor control module and controlled with monitoring
The direct current cabinet DC voltage acquisition module and direct current cabinet charging and discharging currents acquisition module of module connection, the acquisition of direct current cabinet DC voltage
Module and direct current cabinet charging and discharging currents acquisition module for acquiring DC voltage and charge and discharge between battery and fuse respectively
Size of current direction；Monitoring control module is for storing threshold value, and monitoring control module is for storing threshold value, and it is straight to receive direct current cabinet
The voltage and current direction size and threshold comparison of voltage acquisition module and the acquisition of direct current cabinet charging and discharging currents acquisition module are flowed, if
At least one is lower than threshold value for the voltage and current of acquisition and threshold comparison, then alarms, independently of transformer station direct current system,
Applied in substation's ac and dc systems, pass through charging and discharging currents size direction and direct current cabinet between acquisition battery and fuse
Hold DC voltage；Monitoring charger can thus be played whether normal operation, whether battery fuse RD fuses, to sentence
Whether disconnected entirety direct current system works normally, and can judge whether battery and bus thread off in time, charger whether normal operation,
It, being capable of the whether normal work of effective monitoring substation direct current system by passive switch amount output abnormality signal to comprehensive from backstage
Make.
Detailed description of the invention
Fig. 1 is attachment structure schematic diagram of the present invention.
Fig. 2 is present system structural schematic diagram.
Fig. 3 is single-chip microcontroller elementary diagram used by present system.
Fig. 4 is that present system DC voltage acquires elementary diagram.
Fig. 5 is the schematic diagram of present system outputting alarm signal.
Fig. 6 is present system liquid crystal display principle figure.
Fig. 7 is present system numeric keypad schematic diagram.
Fig. 8 is present system power unit schematic diagram.
Fig. 9 is present system clock and logout schematic diagram.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
As shown in Figure 1, switch K1 invests left side closure, switch DMK1 in transforming plant DC power-supply system normal operation
Closure, switch K2 invest right side closure, and switch DMK3 closure, switch K3 is in an intermediate position, Ι,Split operation, two groups of batteries
In floating charge state；
As shown in Fig. 2 to Fig. 9, a kind of to be based on substation's alternating current-direct current down Monitor Unit system, including monitoring control module and
The direct current cabinet DC voltage acquisition module and direct current cabinet charging and discharging currents acquisition module, direct current cabinet connecting with monitoring control module are straight
Voltage acquisition module and direct current cabinet charging and discharging currents acquisition module are flowed for acquiring direct current between battery and fuse respectively
Pressure and charging and discharging currents size direction；Monitoring control module receives direct current cabinet DC voltage acquisition module for storing threshold value
The voltage and current and threshold comparison acquired with direct current cabinet charging and discharging currents acquisition module, if the voltage and current and threshold value of acquisition
At least one is compared lower than threshold value, then alarms, does not otherwise alarm.
It further include the output-controlling device being connect with monitoring control module, output-controlling device connection monitoring control module
Output end, monitoring control module exports the peak that reversely disappears through diode and send the alarm of relay output voltage and electric current alarm signal, defeated
Divide 3 tunnels: first via DC voltage alarm output out；Second tunnel exchanges alarm output；Third road voltage and electric current alarm output；
It further include display panel module, power module and the clock circuit being connect with monitoring control module；
Control module P mouthfuls of connection of display panel module serial ports 128X64 liquid crystal display and monitoring；Monobus numeric keypad is through upper
Pull-up resistor pull-up, is input to control module key mouthfuls of monitoring；Power module provides the reliable source of power of system work, through capacitor filtering
After input to system；Clock circuit provides the clock of system work and the time of logout, for judging the time thing of power down
Part record.
The single-chip microcontroller that control module uses STC8A8K64S4A12 is monitored, this single-chip microcontroller contains 4 High Speed Serials, wherein one
A to be applied to liquid crystal display P0 mouthfuls, second serial ports P4.3 and P4.4 connect the digital opening Hall transducer of 485 sampling interfaces
The charging and discharging currents of sampling, P3.0 and P3.1 are applied to download online program (JP7)；P1.1-3 is exported applied to fault warning
(direct current power fail warning, AC dump alarm, direct current and exchange alarm output)；P2 mouthfuls are applied to numeric keypad；Pin10 connects direct current
The reference voltage 2.5V of power down sampling；P1.6 meets the input AD1 of direct current power down sampling；
Direct current cabinet DC voltage acquisition module samples after electric resistance partial pressure, and amplifier compares output to analog-to-digital conversion AD1 to list
Piece machine；
Direct current cabinet charging and discharging currents acquisition module has 485 interfaces using opening Hall sensor, defeated using digital quantity
Out, it send single-chip microcontroller 485 interface, facilitates in-site installation；
One kind being based on substation's alternating current-direct current down Monitor Unit method, passes through charging and discharging currents between acquisition battery and fuse
Size direction and DC voltage, if DC voltage value is less than battery total voltage threshold value or charging and discharging currents are less than floating charging
1-3mA/Ah is flowed, then carries out early warning, judges substation's alternating current-direct current power down, is broken down, otherwise without early warning.Battery is always electric
Pressing threshold value is 0.05 times of battery pack joint number.
Embodiment
Battery total voltage threshold value is 0.05 times of battery pack joint number: forming direct-flow storage battery using 104 batteries groups, often
Batteries group actual value is less than 0.05 volt of mark value, i.e. given threshold is 0.05V, i.e., the battery being made of 104 batteries groups
If voltage, which floats, is less than standard value 5.2V, that is, think system exception.(2.28-2.23) * 104=5.2V or (2.28-2.23)
X108=5.4V；
Such as included replaceable fuse of voltage measurement circuit is more preferable, is convenient for field connection.
Floating current considers according to 1-3mA/Ah, the minimum battery for selecting 100Ah of general substation, at this electric current according to
100mA measured value considers precision, thinks system exception lower than 100mA.
The present apparatus is tested through experiment and field application, has been reached the set goal, can effectively have been monitored the work of direct current cabinet
Make state, can effectively judge the problem of whether there is alternating current-direct current power down of direct current cabinet, and alternating current-direct current can be sent in time and fallen
The warning information of electricity is to comprehensive from backstage.Independently of transformer station direct current system, it is applied in substation's ac and dc systems, passes through acquisition
Charging and discharging currents size direction and direct current cabinet end DC voltage between battery and fuse；Monitoring charging can thus be played
Whether normal operation, whether battery fuse RD fuses machine, thus judge whether whole direct current system works normally, it can be timely
Judge whether battery and bus thread off, charger whether normal operation, by passive switch amount output abnormality signal to it is comprehensive from
From the background.Can effectively monitoring substation direct current system whether work normally.Substation's alternating current-direct current down Monitor Unit device, is applied to
In substation's ac and dc systems, pass through charging and discharging currents size direction and DC voltage between acquisition battery and fuse；This
Sample can play monitoring charger whether normal operation, and whether battery fuse RD fuses, to judge whole direct current system
Whether system works normally, and can judge whether battery and bus thread off in time, charger whether normal operation, passes through passive switch
Output abnormality signal is measured to comprehensive from backstage.
Claims (7)
1. one kind be based on substation's alternating current-direct current down Monitor Unit system, which is characterized in that including monitoring control module and with monitoring
The direct current cabinet DC voltage acquisition module and direct current cabinet charging and discharging currents acquisition module of control module connection, direct current cabinet DC voltage
Acquisition module and direct current cabinet charging and discharging currents acquisition module are for acquiring DC voltage between battery and fuse respectively and filling
Discharge current size direction；Monitoring control module receives direct current cabinet DC voltage acquisition module and direct current for storing threshold value
Shield the voltage and current and threshold comparison of the acquisition of charging and discharging currents acquisition module, if the voltage and current of acquisition and threshold comparison are extremely
Rare one is lower than threshold value, then alarms, otherwise do not alarm.
A kind of be based on substation's alternating current-direct current down Monitor Unit system 2. according to claim 1, which is characterized in that further include with
Monitor the output-controlling device of control module connection, the output end of output-controlling device connection monitoring control module, monitoring control
Module exports the peak that reversely disappears through diode and send the alarm of relay output voltage and electric current alarm signal.
A kind of be based on substation's alternating current-direct current down Monitor Unit system 3. according to claim 1, which is characterized in that further include with
Monitor display panel module, power module and the clock circuit of control module connection, display panel module serial ports 128X64 liquid crystal display
With control module P mouthfuls of connection of monitoring；Monobus numeric keypad is pulled up through pull-up resistor, is input to control module key mouthfuls of monitoring；Electricity
Source module provides the reliable source of power of system work, and system is inputed to after capacitor filtering；Clock circuit provide system work when
The time of clock and logout, for judging that the time-event of power down records.
4. according to claim 1 a kind of based on substation's alternating current-direct current down Monitor Unit system, which is characterized in that monitoring control
Module uses the single-chip microcontroller of STC8A8K64S4A12.
5. a kind of substation's alternating current-direct current down Monitor Unit method based on monitoring system according to claim 1, feature exist
In by charging and discharging currents size direction and DC voltage between acquisition battery and fuse, if DC voltage value is less than storage
Battery total voltage threshold value or charging and discharging currents are less than floating current threshold value, then carry out early warning, judge that substation's alternating current-direct current falls
Electricity breaks down, otherwise without early warning.
6. a kind of substation's alternating current-direct current that is based on according to claim 5 falls electric measuring method, which is characterized in that floating current threshold
Value is 1-3mA/Ah.
7. a kind of substation's alternating current-direct current that is based on according to claim 5 falls electric measuring method, which is characterized in that battery is always electric
Pressing threshold value is 0.05 times of battery pack joint number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811436902.4A CN109596880A (en) | 2018-11-28 | 2018-11-28 | One kind being based on substation's alternating current-direct current down Monitor Unit system and monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811436902.4A CN109596880A (en) | 2018-11-28 | 2018-11-28 | One kind being based on substation's alternating current-direct current down Monitor Unit system and monitoring method |
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| Publication Number | Publication Date |
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| CN109596880A true CN109596880A (en) | 2019-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811436902.4A Pending CN109596880A (en) | 2018-11-28 | 2018-11-28 | One kind being based on substation's alternating current-direct current down Monitor Unit system and monitoring method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531144A (en) * | 2019-08-12 | 2019-12-03 | 珠海瓦特电力设备有限公司 | A kind of grid switching operation guide device and method |
| CN111323672A (en) * | 2020-04-14 | 2020-06-23 | 广州思泰信息技术有限公司 | Remote availability detection device for substation automation equipment |
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| JP2014096892A (en) * | 2012-11-08 | 2014-05-22 | Toshiba Mitsubishi-Electric Industrial System Corp | Fuse melting assist circuit and power conversion device |
| CN106451794A (en) * | 2016-11-30 | 2017-02-22 | 王亚鲁 | Storage battery leaving direct-current bus monitoring alarm device and method |
| CN106788015A (en) * | 2016-12-16 | 2017-05-31 | 武汉理工大学 | A kind of monitoring of electric machine controller dc bus power down and processing method |
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| CN107132483A (en) * | 2017-04-28 | 2017-09-05 | 广东电网有限责任公司珠海供电局 | Storage batteries of transformer substation departs from dc bus monitoring system |
| CN206696335U (en) * | 2017-03-27 | 2017-12-01 | 安徽新力电气设备有限责任公司 | Prevent the monitoring device that battery pack is not put into |
| CN206892292U (en) * | 2017-06-26 | 2018-01-16 | 广东电网有限责任公司珠海供电局 | A kind of batteries main fuse fusing and open circuit detecting device |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1540357A (en) * | 2003-04-23 | 2004-10-27 | 华为技术有限公司 | System of giving an alarm of AC power down |
| JP2014096892A (en) * | 2012-11-08 | 2014-05-22 | Toshiba Mitsubishi-Electric Industrial System Corp | Fuse melting assist circuit and power conversion device |
| CN106451794A (en) * | 2016-11-30 | 2017-02-22 | 王亚鲁 | Storage battery leaving direct-current bus monitoring alarm device and method |
| CN206313535U (en) * | 2016-11-30 | 2017-07-07 | 山东智洋电气股份有限公司 | Batteries depart from dc bus monitor alarm device |
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| CN206696335U (en) * | 2017-03-27 | 2017-12-01 | 安徽新力电气设备有限责任公司 | Prevent the monitoring device that battery pack is not put into |
| CN107132483A (en) * | 2017-04-28 | 2017-09-05 | 广东电网有限责任公司珠海供电局 | Storage batteries of transformer substation departs from dc bus monitoring system |
| CN206892292U (en) * | 2017-06-26 | 2018-01-16 | 广东电网有限责任公司珠海供电局 | A kind of batteries main fuse fusing and open circuit detecting device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531144A (en) * | 2019-08-12 | 2019-12-03 | 珠海瓦特电力设备有限公司 | A kind of grid switching operation guide device and method |
| CN111323672A (en) * | 2020-04-14 | 2020-06-23 | 广州思泰信息技术有限公司 | Remote availability detection device for substation automation equipment |
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Application publication date: 20190409 |