CN209132390U - Direct current system battery group disconnecting switch monitoring device - Google Patents
Direct current system battery group disconnecting switch monitoring device Download PDFInfo
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- CN209132390U CN209132390U CN201821928946.4U CN201821928946U CN209132390U CN 209132390 U CN209132390 U CN 209132390U CN 201821928946 U CN201821928946 U CN 201821928946U CN 209132390 U CN209132390 U CN 209132390U
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- disconnecting switch
- monitoring module
- voltage
- central controller
- monitoring
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Abstract
The utility model discloses a kind of direct current system battery group disconnecting switch monitoring devices, including voltage monitoring module, current monitoring module, auxiliary contact position monitoring modular and central controller, the voltage monitoring module, current monitoring module, position monitoring module and central controller are integrated and are set in monitor box；The surface of the monitor box is provided with power supply indicator, status indicator lamp and alarm lamp, the collected voltage data of the voltage monitoring module, the collected current information of current monitoring module and the collected auxiliary contact position information of position monitoring module are sent to the central controller, and central controller calculates received information, analyzes, stores and shows result by the status indicator lamp or alarm lamp.The utility model carries out joint judgement to battery group disconnecting switch folding condition using the method for voltage, electric current and the combination of disconnecting switch auxiliary contact position information, accurate, intuitive, efficient.
Description
Technical field
The utility model relates to a kind of direct current system battery group disconnecting switch monitoring devices.
Background technique
Currently, DC power system employed in power plant and substation is mainly by monitoring device, charging in electric system
The part such as machine, battery group, DC bus and its feeder unit forms, for interior relay protection, control loop, the monitoring device etc. of standing
Reliable working power is provided, to power infrastructures safe and stable operation, plays very important effect.
According to electric system to DC power system correlation regulation, for the capacity for verifying battery group, to putting four into operation
Battery group within year, answers the checking discharging test of progress in 2 years, to the battery group to put into operation 4 years or more, then
Ying Yinian carries out a checking discharging test, to determine whether battery meets the requirement continued to run.The verification of battery group
It needs to carry out many and diverse operation before property discharge test, battery group is completely disengaged with load, while must assure that operating process
Middle load not decompression must restore former therefore, it is necessary to move back related disconnecting switch according to the throwing of correct operation process, and after core holds
Sample.
Using in operational process, transforming plant DC power-supply system battery group isolator operation is primarily present following
The problem of several aspects:
1, it operates the quality not in place due to disconnecting switch handle and switching frequent operation itself causes performance to decline,
Have disconnecting switch closing or opening in practical substation's maintenance work and operate situation not in place and occur, performance be exactly every
Perhaps be fully disconnected greatly from contact resistance when closing the switch or disconnecting switch disconnect when be still in closed state.
2, for operating process mistake during battery core holds, load and recovery all must be according to certain operations
Otherwise process will lead to bus loss of pressure, load is caused to power off；However, since operating process has no prompt, it is possible that behaviour
Make the case where process mistake is without learning.
3, operation human negligence may have operations staff to neglect in operation, cause some isolation during core holds
Switch does not recover to correct position, causes system exception, the appearance of the case where bus loss of pressure or battery emptying occurs.
Situation described above finally may all cause battery emptying or bus loss of pressure, to cause great safe thing
Therefore.And effective monitoring means are lacked to the key interconnection switch of direct current system battery group, it is artificial to only rely upon operator
Whether identification is unable to judge accurately disconnecting switch and is opened or closed intact, there are serious security risks to complete operations.
Utility model content
Technical problem to be solved in the utility model is to overcome defect described above, is provided a kind of intuitive and accurate straight
Streaming system battery group disconnecting switch monitoring device realizes the monitoring to the key interconnection switch of direct current system, grasps practical feelings
Condition is conveniently adopted an effective measure, and guarantees safe operation of power system.
In order to solve the problems, such as techniques described above, direct current system battery group disconnecting switch monitoring dress described in the utility model
Set, including the voltage monitoring module for monitoring disconnecting switch circuit, the current monitoring module for monitoring disconnecting switch circuit,
For acquiring the position monitoring module and central controller of disconnecting switch auxiliary contact position information, the voltage monitoring module,
Current monitoring module, position monitoring module and central controller are integrated and are set in monitor box；The table of the monitor box
Face is provided with power supply indicator, status indicator lamp and the alarm lamp connecting with the central controller conducting wire, the voltage
The voltage datas of the collected disconnecting switch two sides of monitoring modular, the collected disconnecting switch circuit of current monitoring module electric current
The location information of information and the collected disconnecting switch auxiliary contact of position monitoring module is sent to the central controller, described
Central controller calculates received information, is analyzed, is stored and will as the result is shown.
Further, central controller described in the utility model calculates received information, is analyzed, is stored, can
By result by being set to the simulation icon Dynamically Announce on the monitor box surface.
Preferably, monitor box described in the utility model is plastic casing.
The utility model is monitored battery disconnecting switch in DC power system, is isolated by calculating accumulator group
Switch the voltage difference of two sides voltage, the electric current that measurement disconnecting switch passes through, the position signal for identifying disconnecting switch auxiliary contact, group
The case where whether detection and isolation switch is fully disconnected or is closed, determine switching action correctly and in place, avoid the occurrence of mistakes and omissions is closed, is mentioned
The accuracy and confidence level of high analyte judgement, it is possible to find incipient fault hidden danger.Specifically:
1, contact determining method judges the folding condition of switch according to disconnecting switch auxiliary contact；
2, electric current determining method judges switch state by the electric current that switch is flowed through in current sensor acquisition, if there is electric current to flow through
Reach setting value then to illustrate to close the switch well；
3, pressure difference determining method is by judging whether switch ends voltage unanimously determines switch state, if there is two sides voltage difference
Reach setting value then to illustrate to close the switch well.
The utility model solves mesh the utility model has the advantages that the utility model has many advantages, such as monitoring precision height, intuitive display
Battery disconnecting switch state can not be monitored effectively and bring severe compromise in preceding DC power system, especially be showed
:
1. on-line monitoring: by intelligent and automation monitoring, implementing more determining methods to disconnecting switch in direct current system
Cross validation, and combinatory analysis and judgement are carried out, it avoids the occurrence of disconnecting switch and situation not in place is opened or closed；
2. state instruction: the problem of being found according to analysis, prompt in time or prompting operator have found and handle problem,
Accident caused by can reducing because of artificial error in judgement, and prevent the potential faults of the emptying of battery group or DC bus decompression, it mentions
The reliability of high direct current system overall operation.
The direct losses for leading to DC bus decompression because isolator operation is not in place are saved using the utility model, and
Efficiency value is improved to 70% or more；Avoid DC power system because isolator operation it is incorrect caused by accident, average operation
Time was reduced to 1 hour by original 2 hours hereinafter, average operation personnel are reduced by 4 people to 2 people, and value-at-risk is reduced from 100%
To 5%, it is really achieved time saving, laborsaving, inexpensive, low-risk effect, obvious economic has high efficiency and feasibility.
Detailed description of the invention
Fig. 1 is the structural schematic diagram (front) of monitor box described in the utility model；
Fig. 2 is the structural schematic diagram (cross-sectional view) of monitor box described in the utility model；
Fig. 3 is that monitoring pod interface described in embodiment defines schematic diagram；
Fig. 4 is the circuit diagram of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
Direct current system battery group disconnecting switch monitoring device described in the utility model, including returned for monitoring disconnecting switch
The voltage monitoring module on road, the current monitoring module for monitoring disconnecting switch circuit, for acquiring disconnecting switch auxiliary contact
The position monitoring module and central controller of location information, the voltage monitoring module, current monitoring module, position monitoring module
It integrates and is set in monitor box 1 with central controller；The surface of the monitor box 1 is provided with and the central controller
Power supply indicator 2, status indicator lamp 3 and the alarm lamp 4 of conducting wire connection, the voltage monitoring module is collected to keep apart
Close the voltage data of two sides, the current information in the collected disconnecting switch circuit of current monitoring module and the acquisition of position monitoring module
To the location informations of disconnecting switch auxiliary contact be sent to the central controller, the central controller is to received
Information is calculated, is analyzed, is stored and will as the result is shown.
Further, central controller described in the utility model calculates received information, is analyzed, is stored, can
By result by being set to 5 Dynamically Announce of simulation icon on 1 surface of monitor box.
As preferential treatment, monitor box 1 described in the utility model is plastic casing.
Embodiment: each component being installed according to panel cut out and is fixed, then with conducting wire that each component is former according to circuit
Reason figure is attached (referring to attached drawing 4), in which: I1 is battery current IQS, LE3；U1 is accumulator battery voltage DM, PV1；U2
For DC bus-bar voltage KM, PV2；QS1 disconnecting switch between DC power system and battery, QS1 disconnecting switch major loop
Contact 1；Cabinet selects plastic shell, and box sizes are 110 × 90 × 60mm (length × width × height), and according to each component
Installation dimension carries out aperture to installation panel, is identified each component with label on panel.Device needs to connect substation
DC power system DC bus-bar voltage and accumulator battery voltage DC220V, voltage is about 220V on connecting terminal when use.
Interface defines (see attached drawing 3): JP1- DC bus-bar voltage, JP2- accumulator battery voltage, the input of JP3- working power
(85-320Vdc/85-265Vac), JP4- battery current, the input of JP5- switch state, JP6- alarm contact output, JP7-
RS485 communication.
The major function of monitoring unit: monitoring battery disconnecting switch auxiliary contact state (disconnect closure) monitors electric power storage
Pond disconnecting switch is monitored battery disconnecting switch two sides voltage data (0~300V) by current data (0~50A), and alarm is dry
Contact output (normally opened normally closed, contact capacity AC250V1A), real-time monitoring battery disconnecting switch correlated condition, using switch
Simulation drawing Dynamically Announce, and there is sound and light of alarm.
The utility model is by being monitored battery disconnecting switch in DC power system, according to the electricity of disconnecting switch
Pressure difference, electric current, position signal determine its switching action correctly and in place, it is possible to find incipient fault hidden danger.Solves current direct current
Battery disconnecting switch state can not be monitored effectively and bring severe compromise in power-supply system.Judgment method is as follows:
1, contact determining method monitoring battery disconnecting switch auxiliary contact state (disconnect closure)
The folding condition of switch is judged according to disconnecting switch auxiliary contact.Disconnecting switch is equipped with a location status auxiliary
Contact, when disconnecting switch acts (being opened or closed), auxiliary contact will be synchronized to acquire, and be sentenced according to this on-off model
Which kind of state is disconnected disconnecting switch be in.
Judgment method is as follows:
When due to isolator operation, main contact and auxiliary contact may be due to mechanical circuits or other reasons
Cause asynchronous or disconnect, therefore, only by judging that auxiliary contact position can not correctly reflect the major loop touching of disconnecting switch
Point actual working state, the i.e. actual working state of disconnecting switch, therefore, it is necessary to which supplementing other principle criterions makees joint judgement.
2, electric current determining method monitoring battery disconnecting switch passes through current data (0~50A)
Switch state is judged by the electric current that disconnecting switch is flowed through in current sensor acquisition, if having electric current to flow through reaches setting
Value then illustrates to close the switch good.
It, can be according to DC power system institute band DC load, to measure after operation is opened or closed in disconnecting switch completion
The closure of electric current and the detection and isolation switch of associated loop and the integrity disconnected.
After disconnecting switch completes opening operation, flowing through to the electric current in circuit should be zero.
After disconnecting switch completes closed procedure, zero should be more than or equal to the electric current in circuit by flowing through.
Can under normal operating conditions, i.e., normality floating charge when, measure disconnecting switch circuit current differential, carry out detection and isolation
Whether the operating status of switch is normal.
Judgment method is as follows:
Wherein, electric current I1=0 thinks electric current I1=0 when being Mr. Yu setting value Iset small using electric current I1 absolute value,
Electric current I1 ≠ 0 is thought when being Mr. Yu setting value Iset big using electric current I1 absolute value in electric current I1 ≠ 0.
3, pressure difference determining method monitoring battery disconnecting switch two sides voltage data (0~300V)
By judging whether switch ends voltage unanimously determines switch state, if there is two sides voltage difference to reach setting value
Illustrate to close the switch good.
It, can be according to the voltage difference of isolated switch main contact head contact two sides after operation is opened or closed in disconnecting switch completion
Judge its working condition, that is, judge its whether " closed " or "off".
Can under normal operating conditions, i.e., normality floating charge when, measure isolated switch main contact head contact two sides voltage difference,
Whether the operating status for carrying out detection and isolation switch is normal.
Judgment method is as follows:
Wherein, voltage | U1-U2 |=0, when being Mr. Yu setting value Uset small using voltage difference absolute value, that is, think voltage |
U1-U2 |=0, voltage | U1-U2 | ≠ 0, when being Mr. Yu setting value Uset big using voltage difference absolute value, that is, think voltage | U1-
U2|≠0。
Analysis and deterministic process
Real-time monitoring battery disconnecting switch correlated condition (auxiliary contact, voltage difference of the two ends and pass through electric current), using opening
Simulation drawing Dynamically Announce is closed, leads directly to as red vertical line, is broken as green oblique line, and there is sound and light of alarm.When monitoring to store
When battery disconnector disconnects, the indicator light is always on for red alarm, output dry contact acts and longtime call of horn.
Whole flow process is as follows:
The preferred embodiment in the utility model disclosed above is only intended to help to illustrate the utility model.Preferred embodiment is simultaneously
There is no the details that detailed descriptionthe is all, also not limiting the utility model is only the specific embodiment.Obviously, according to this theory
The content of bright book can make many modifications and variations, as long as having used scheme described above, should all fall into the guarantor of the utility model
Protect range.
Claims (3)
1. a kind of direct current system battery group disconnecting switch monitoring device, which is characterized in that the monitoring device includes for supervising
It surveys the voltage monitoring module in disconnecting switch circuit, the current monitoring module for monitoring disconnecting switch circuit, be used to acquire isolation
Switch auxiliary contact position information position monitoring module and central controller, the voltage monitoring module, current monitoring module,
Position monitoring module and central controller, which integrate, to be set in monitor box (1)；The surface of the monitor box (1) is provided with
Power supply indicator (2), status indicator lamp (3) and the alarm lamp (4) being connect with the central controller conducting wire, the voltage
The voltage datas of the collected disconnecting switch two sides of monitoring modular, the collected disconnecting switch circuit of current monitoring module electric current
The location information of information and the collected disconnecting switch auxiliary contact of position monitoring module is sent to the central controller, described
Central controller calculates received information, is analyzed, is stored and will as the result is shown.
2. direct current system battery group disconnecting switch monitoring device according to claim 1, which is characterized in that the center control
Device processed calculates received information, is analyzed, is stored, can be by result by being set to the monitor box (1) surface
Simulate icon (5) Dynamically Announce.
3. direct current system battery group disconnecting switch monitoring device according to claim 1 or claim 2, which is characterized in that the prison
Surveying box (1) is plastic casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821928946.4U CN209132390U (en) | 2018-11-22 | 2018-11-22 | Direct current system battery group disconnecting switch monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821928946.4U CN209132390U (en) | 2018-11-22 | 2018-11-22 | Direct current system battery group disconnecting switch monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209132390U true CN209132390U (en) | 2019-07-19 |
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ID=67246370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821928946.4U Active CN209132390U (en) | 2018-11-22 | 2018-11-22 | Direct current system battery group disconnecting switch monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167161A (en) * | 2021-10-21 | 2022-03-11 | 国网河北省电力有限公司石家庄供电分公司 | Secondary power grid side switch equipment on-off state sensing device and method |
-
2018
- 2018-11-22 CN CN201821928946.4U patent/CN209132390U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167161A (en) * | 2021-10-21 | 2022-03-11 | 国网河北省电力有限公司石家庄供电分公司 | Secondary power grid side switch equipment on-off state sensing device and method |
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