CN110531144A - A kind of grid switching operation guide device and method - Google Patents
A kind of grid switching operation guide device and method Download PDFInfo
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- CN110531144A CN110531144A CN201910737936.5A CN201910737936A CN110531144A CN 110531144 A CN110531144 A CN 110531144A CN 201910737936 A CN201910737936 A CN 201910737936A CN 110531144 A CN110531144 A CN 110531144A
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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
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
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Abstract
It includes processing unit, current acquisition unit, voltage acquisition unit, state acquisition unit, function selection unit and prompt unit that the present invention, which discloses a kind of grid switching operation guide device and method, the device,；Current acquisition unit is for acquiring the current signal for flowing through disconnecting switch；State acquisition unit is used to acquire the on off operating mode signal of the auxiliary contact of disconnecting switch；Voltage acquisition unit is used to acquire the voltage signal of charger and battery group；Processing unit is used to judge according to current signal, on off operating mode signal and voltage signal the correctness of grid switching operation, and the acousto-optic hint of grid switching operation is carried out by prompt unit.The present invention realizes the acousto-optic hint of grid switching operation through the processing unit and judges the correctness of grid switching operation according to current signal, on off operating mode signal and voltage signal, it can guarantee the correctness of grid switching operation, and avoid all-sidedly and accurately judging and identify potential potential faults because the difference of technology level of operator is larger.
Description
Technical field
The present invention relates to electrical equipment technical fields, and in particular to a kind of grid switching operation guide device and method.
Background technique
In power plant and substation, DC power system is relay protection, control loop, monitoring and communication equipment in standing
The equal reliable working power of offers plays very important effect to power infrastructures safe and stable operation.
According to electric system to the related regulation of DC power system, hold to verify the battery group of DC power system
Amount, Ying Jinhang checking discharging test, to determine whether battery meets the service requirement of DC power system.Battery group exists
Before carrying out checking discharging test, needs to carry out many and diverse grid switching operation, battery group is completely disengaged with load, and must protect
It demonstrate,proves in operating process, the load of DC power system not decompression, therefore, it is necessary to move back related isolation according to the throwing of correct operating process
Switch, and must also restore as former state after core holds.
Please refer to Fig. 1, DC power system generallys use duplicate system retrofit, independent there are two sets in same station factory
DC power system, every set DC power system include the battery group connecting with bus and fill with what battery group was connect
Motor, wherein first set DC power system includes that charger I and battery group I, charger I pass through disconnecting switch ZK1 and I
Section bus connection, battery group I are connect by disconnecting switch ZK2 with I sections of buses, and second set of DC power system includes charger
II and battery group II, charger II are connect by disconnecting switch ZK3 with II sections of buses, and battery group II passes through disconnecting switch
ZK4 is connect with II sections of buses, is connected with disconnecting switch ZK5 between I sections of buses and II sections of buses, wherein each disconnecting switch (ZK1
~ZK5) it include the main contacts and auxiliary contact to link.If wherein a set of failure needs to overhaul, need to pass through
This section of load is transferred to another set of DC power system by grid switching operation, manages whole loads by a set of DC power system, and
After this maintenance completion, respective autonomous working is reverted to.
At this stage, every power equipment operation in power plant or substation, almost requires manual operation to complete,
It can guarantee the stability of work operation.Therefore, during every electric power operation, these operator's oneself factors play non-
Normal important role.Some operators, may be because of the scarce capacity of itself during operation, can not be according to stringent
Standard operation program work, thus the phenomenon that occurring as soon as operation error.In addition to this, in operation, mainly
It relies on operator and artificial judgment and identification is carried out to the method for operation, equipment state etc., since the technical level of operator is poor
It is different larger, cannot all-sidedly and accurately judge and identify potential potential faults, to operating result and system reliability of operation without
Method is guaranteed.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of the invention at least solve the technical problems existing in the prior art it
One, a kind of grid switching operation guide device is provided, for solving there is peace by artificial grid switching operation and manual identified equipment state
The problem of full hidden danger.
The contents of the present invention are as follows:
A kind of grid switching operation guide device, the current acquisition being connect including processing unit and respectively with the processing unit
Unit, voltage acquisition unit, state acquisition unit, function selection unit and prompt unit；
The current signal is sent to by the current acquisition unit for acquiring the current signal for flowing through disconnecting switch
The processing unit；
The state acquisition unit is used to acquire the on off operating mode signal of the auxiliary contact of disconnecting switch, and by the on-off
Status signal is sent to the processing unit；
The voltage acquisition unit is used to acquire the voltage signal of charger and battery group, and the voltage signal is sent out
Give the processing unit；
The processing unit is used to be fallen according to the judgement of the current signal, the on off operating mode signal and the voltage signal
The correctness of lock operation, and pass through the acousto-optic hint of prompt unit progress grid switching operation.
Preferably, the prompt unit includes state simulation figure, and the shape there are two types of color is arranged on the state simulation figure
State indicator light, the status indicator lamp of the first color are used to indicate operation correctly, and the status indicator lamp of second of color is for referring to
Show operating mistake.
Preferably, the prompt unit further includes display and/or audio alert unit.
Preferably, the processing unit includes the analog to digital conversion circuit and comparator circuit to link together, the modulus
The input terminal of conversion circuit connects with the current acquisition unit, the voltage acquisition unit and the state acquisition unit respectively
It connects, the output end of the comparator circuit is connect with the prompt unit.
Preferably, the processing unit is also connected with clock synchronization unit.
The present invention also provides a kind of grid switching operation bootstrap techniques, set for solving by artificial grid switching operation and manual identified
There is security risk in standby state.
A kind of grid switching operation bootstrap technique, based on above-mentioned grid switching operation guide device, comprising the following steps:
S1. selection needs the DC power system section of grid switching operation；
S2. initialization detection is carried out to the disconnecting switch of the DC power system section；
S3. grid switching operation guidance is carried out according to preset grid switching operation process, and detects the current signal, the on-off
Status signal and the voltage signal；
S4. current grid switching operation is judged according to the current signal, the on off operating mode signal and the voltage signal
It is whether correct, if so, continuing grid switching operation guidance, otherwise, issue alarm.
Preferably, preset grid switching operation process includes back brake start-up operation and back brake recovery operation in step S3；Wherein,
The following steps are included: when the section of DC power system is I sections, disconnecting switch ZK5 closes a floodgate for back brake start-up operation,
Disconnecting switch ZK2 separating brake, disconnecting switch ZK1 separating brake；When the section of DC power system is II, disconnecting switch ZK5 closes a floodgate, every
It leaves and closes ZK4 separating brake, disconnecting switch ZK3 separating brake；
The following steps are included: when the section of DC power system is I sections, disconnecting switch ZK1 closes a floodgate for back brake recovery operation,
Disconnecting switch ZK2 closes a floodgate, disconnecting switch ZK5 separating brake；When the section of DC power system is II, disconnecting switch ZK3 closes a floodgate, every
It leaves and closes ZK4 combined floodgate, disconnecting switch ZK5 separating brake.
Preferably, worked as in step S4 according to the judgement of the current signal, the on off operating mode signal and the voltage signal
The whether correct method of preceding grid switching operation includes,
The judgment method of disconnecting switch closing operation correctness: if the current signal is greater than current threshold, and described logical
Disconnected status signal is closed state, then disconnecting switch closing operation is correct, otherwise disconnecting switch closing operation mistake；
The judgment method of disconnecting switch sub-switching operation correctness: if the voltage signal is greater than voltage threshold, and described logical
Disconnected status signal is off-state, then disconnecting switch sub-switching operation is correct, otherwise disconnecting switch sub-switching operation mistake.
The invention has the benefit that the present invention realizes the acousto-optic hint of grid switching operation and through the processing unit according to institute
State the correctness that current signal, the on off operating mode signal and the voltage signal judge grid switching operation, it is ensured that back brake behaviour
The correctness of work, and avoid all-sidedly and accurately judging and identify to dive because the difference of technology level of operator is larger
Potential faults.
Detailed description of the invention
Fig. 1 show the schematic diagram of DC power system in the prior art；
Fig. 2 show the functional block diagram of grid switching operation guide device embodiment of the present invention；
Fig. 3 show the schematic diagram of the operation panel of the embodiment of the present invention.
Specific embodiment
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.
Please refer to Fig. 1-2, a kind of grid switching operation guide device disclosed in the present embodiment, including processing unit 1 and difference
It the current acquisition unit 2 that is connect with processing unit 1, voltage acquisition unit 3, state acquisition unit 4, function selection unit 5 and mentions
Show unit 6；
Current acquisition unit 2 sends current signal for acquiring the current signal for flowing through disconnecting switch ZK1~ZK5
To processing unit 1；
Each disconnecting switch includes main contacts and auxiliary contact, and main contacts and auxiliary contact are linkages, and are flowed through auxiliary
Help the electric current of contact small, without taking arc extinguishing measure that can obtain the switch state of disconnecting switch ZK1~ZK5, state acquisition list
The on off operating mode signal of auxiliary contact of the member 4 for acquiring disconnecting switch ZK1~ZK5, and on off operating mode signal is sent to place
Manage unit 1；
Voltage acquisition unit 3 is used to acquire the voltage signal of charger and battery group, and voltage signal is sent to place
Unit 1 is managed, wherein charger includes charger I and charger II, and battery group includes battery group I and battery group II；
Processing unit 1 is used to judge according to current signal, on off operating mode signal and voltage signal the correctness of grid switching operation,
And the acousto-optic hint of grid switching operation is carried out by prompt unit 6.
In the present embodiment, existing circuit is can be used in current acquisition unit 2 and voltage acquisition unit 3, and wherein electric current is adopted
The input terminal of collection unit 2 is connect with the auxiliary contact of disconnecting switch ZK1~ZK5 respectively, the input terminal difference of voltage acquisition unit 3
It is connect with the auxiliary contact of disconnecting switch ZK1~ZK5.The present embodiment through the processing unit 1 realize grid switching operation acousto-optic hint
And the whether correct of grid switching operation is judged according to current signal, on off operating mode signal and voltage signal, it is ensured that back brake behaviour
The correctness of work, and avoid all-sidedly and accurately judging and identify to dive because the difference of technology level of operator is larger
Potential faults.
Referring to figure 3., prompt unit 6 includes state simulation Figure 61, and there are two types of the shapes of color for setting on state simulation Figure 61
State indicator light 62, the status indicator lamp of the first color are used to indicate operation correctly, and the status indicator lamp of second of color is used for
It indicates operating mistake, current operation and equipment relevant to current operation can be intuitively shown by state simulation Figure 61
Title for operator insufficient for experience, can quickly identify the equipment for leading to failure because of operation error, guarantee work
Make the stability run, and use the status indicator lamp of two kinds of colors, can intuitively show whether current operation is correct.
Prompt unit 6 further includes that display 63 and/or audio alert unit (not shown) are mentioned according to needs of production
Show that unit 6 can configure at least one of display 63 and audio alert unit, display 63 is displayed for operate
Information, the audio alert unit such as function, the process of grid switching operation and result can be used for carrying out voice prompting and alarm, operate
Personnel improve grid switching operation without often checking display 63 or state simulation Figure 61 it can be learnt that whether current operation is correct
Convenience.
Further, function selection unit 5, state simulation Figure 61, display 63 and audio alert unit can integrate and set
It sets on operation panel 8, further, display 63 can use touching-type monitor, advantageously reduce operation button, make
The input of information and more facilitating for display.
State acquisition unit 4 is led to by detecting whether that electric current flows through disconnecting switch ZK1~ZK5 come what detection and isolation switched
Disconnected state, if there is electric current to flow through disconnecting switch ZK1~ZK5, disconnecting switch ZK1~ZK5 is in closed state, otherwise keeps apart
Pass is in an off state, such as: if there is electric current to flow through disconnecting switch ZK1, disconnecting switch ZK1 is in closed state, otherwise every
Pass is left to be in an off state.State acquisition unit 4 includes sequentially connected filter circuit, signal amplification circuit and trigger electricity
Road, wherein the input terminal of filter circuit and the auxiliary contact of disconnecting switch connect, and filter circuit can filter out disconnecting switch on-off
When the peak voltage that generates, guarantee the safety of circuit；Signal amplification circuit is for putting the lesser signal of signal strength
Greatly, guarantee that signal strength meets circuit requirement；The output end of flip-flop circuit is connect with processing unit 1, and flip-flop circuit can be with
Using the memory function of trigger, signal is maintained at stable state.
Processing unit 1 includes the analog to digital conversion circuit and comparator circuit to link together, the input of analog to digital conversion circuit
End connect respectively with current acquisition unit 2, voltage acquisition unit 3 and state acquisition unit 4, the output end of comparator circuit with mention
Show that unit 6 connects, processing unit 1 is using the chip or circuit with logical process function, it is preferred that processing unit 1 uses type
It number is the single-chip computer and its peripheral circuit of STM32 series, processing unit 1 is by built-in analog to digital conversion circuit by analog signal turn
It is changed to digital signal, convenient for the operation of logic, comparator circuit is compared for realizing digital signal with preset threshold value, is sentenced
Whether current operation of breaking is correct.
Processing unit 1 is also connected with clock synchronization unit 7, and clock synchronization unit 7 uses GPS time setting circuit, the clock synchronization of GPS time setting circuit
Error can record operation, operation and alert data in real time, be conducive to subsequent analysis and diagnosis less than 1 millisecond.
The present embodiment also provides a kind of grid switching operation bootstrap technique, based on above-mentioned grid switching operation guide device, including with
Lower step:
S1. selection needs the DC power system section of grid switching operation, and the section of DC power system includes I sections and II
Section；
S2. initialization detection is carried out to the disconnecting switch of DC power system section, it can be determined that disconnecting switch is current
Whether state meets preset requirement, if so, thening follow the steps S3, otherwise, issues alarm；
S3. grid switching operation guidance, and sensed current signal, on off operating mode signal are carried out according to preset grid switching operation process
And voltage signal；
S4. judge whether current grid switching operation is correct according to current signal, on off operating mode signal and voltage signal, if
It is then to continue grid switching operation guidance, otherwise, issues alarm.
The monitoring and guidance of the grid switching operation bootstrap technique of the present embodiment 1 pair of grid switching operation process through the processing unit, can
To guarantee the specification of grid switching operation, the probability of operation error is reduced；Through the processing unit 1 come to the method for operation, equipment state into
Row judgement, can be larger due to the difference of technology level of operator in solution, cannot all-sidedly and accurately judge and identify potential
Potential faults the problem of, be conducive to improve operating result and system reliability of operation.
Specifically, preset grid switching operation process includes back brake start-up operation and back brake recovery operation in step S3；Wherein,
The following steps are included: when the section of DC power system is I sections, disconnecting switch ZK5 closes a floodgate for back brake start-up operation,
Disconnecting switch ZK2 separating brake, disconnecting switch ZK1 separating brake；When the section of DC power system is II, disconnecting switch ZK5 closes a floodgate, every
It leaves and closes ZK4 separating brake, disconnecting switch ZK3 separating brake；
The following steps are included: when the section of DC power system is I sections, disconnecting switch ZK1 closes a floodgate for back brake recovery operation,
Disconnecting switch ZK2 closes a floodgate, disconnecting switch ZK5 separating brake；When the section of DC power system is II, disconnecting switch ZK3 closes a floodgate, every
It leaves and closes ZK4 combined floodgate, disconnecting switch ZK5 separating brake.
Judge whether current grid switching operation is correct according to current signal, on off operating mode signal and voltage signal in step S4
Method include,
The judgment method of disconnecting switch closing operation correctness: if current signal is greater than current threshold, and on off operating mode is believed
Number be closed state, then disconnecting switch closing operation is correct, otherwise disconnecting switch closing operation mistake；
The judgment method of disconnecting switch sub-switching operation correctness: if voltage signal is greater than voltage threshold, and on off operating mode is believed
Number be off-state, then disconnecting switch sub-switching operation is correct, otherwise disconnecting switch sub-switching operation mistake.
The decision logic of the present embodiment is as shown in table 1, wherein IThreshold valueFor the current threshold for flowing through disconnecting switch, UThreshold valueKeep apart
The voltage threshold of pass:
Table 1
Keeping apart for the present embodiment close/and separating brake judges whether operation is correct by two kinds of signals, it can be to avoid list
Unstable, the reliability of guarantee grid switching operation guidance of one signal.
The above, only presently preferred embodiments of the present invention, the invention is not limited to above embodiment, as long as
It reaches technical effect of the invention with identical means, all should belong to protection scope of the present invention.In protection model of the invention
Its technical solution and/or embodiment can have a variety of different modifications and variations in enclosing.
Claims (8)
1. a kind of grid switching operation guide device, it is characterised in that: including processing unit (1) and respectively with the processing unit
(1) the current acquisition unit (2) that connects, state acquisition unit (4), function selection unit (5) and mentions voltage acquisition unit (3)
Show unit (6)；
The current acquisition unit (2) is for acquiring the current signal for flowing through disconnecting switch (ZK1~ZK5), and by the electric current
Signal is sent to the processing unit (1)；
The state acquisition unit (4) is used to acquire the on off operating mode signal of the auxiliary contact of disconnecting switch (ZK1~ZK5), and
The on off operating mode signal is sent to the processing unit (1)；
The voltage acquisition unit (3) is used to acquire the voltage signal of charger and battery group, and the voltage signal is sent out
Give the processing unit (1)；
The processing unit (1) is used to be fallen according to the judgement of the current signal, the on off operating mode signal and the voltage signal
The correctness of lock operation, and pass through the acousto-optic hint of the prompt unit (6) progress grid switching operation.
2. grid switching operation guide device as described in claim 1, it is characterised in that: the prompt unit (6) includes state mould
Quasi- to scheme (61), there are two types of the status indicator lamp (62) of color, the states of the first color for setting on the state simulation figure (61)
Indicator light is used to indicate operation correctly, and the status indicator lamp of second of color is used to indicate operating mistake.
3. grid switching operation guide device as claimed in claim 2, it is characterised in that: the prompt unit (6) further includes display
Device (63) and/or audio alert unit.
4. grid switching operation guide device as described in claim 1, it is characterised in that: the processing unit (1) includes being connected to
Analog to digital conversion circuit and comparator circuit together, the input terminal of analog-digital conversion circuit as described respectively with the current acquisition unit
(2), the voltage acquisition unit (3) and the state acquisition unit (4) connection, the output end of the comparator circuit with it is described
Prompt unit (6) connection.
5. grid switching operation guide device as described in claim 1, it is characterised in that: the processing unit (1) is also connected with pair
Shi Danyuan (7).
6. a kind of grid switching operation bootstrap technique, which is characterized in that drawn based on grid switching operation described in claim 1-5 any one
Lead device, comprising the following steps:
S1. selection needs the DC power system section of grid switching operation；
S2. initialization detection is carried out to the disconnecting switch of the DC power system section；
S3. grid switching operation guidance is carried out according to preset grid switching operation process, and detects the current signal, the on off operating mode
Signal and the voltage signal；
S4. whether current grid switching operation is judged according to the current signal, the on off operating mode signal and the voltage signal
Correctly, if so, continuing grid switching operation guidance, otherwise, alarm is issued.
7. grid switching operation bootstrap technique as claimed in claim 6, which is characterized in that preset grid switching operation process in step S3
Including back brake start-up operation and back brake recovery operation；Wherein,
The following steps are included: when the section of DC power system is I sections, disconnecting switch ZK5 closes a floodgate for back brake start-up operation, isolation
Switch ZK2 separating brake, disconnecting switch ZK1 separating brake；When the section of DC power system is II, disconnecting switch ZK5 closes a floodgate, and keeps apart
Close ZK4 separating brake, disconnecting switch ZK3 separating brake；
The following steps are included: when the section of DC power system is I sections, disconnecting switch ZK1 closes a floodgate for back brake recovery operation, isolation
Switch ZK2 closes a floodgate, disconnecting switch ZK5 separating brake；When the section of DC power system is II, disconnecting switch ZK3 closes a floodgate, and keeps apart
It closes ZK4 to close a floodgate, disconnecting switch ZK5 separating brake.
8. grid switching operation bootstrap technique as claimed in claim 6, which is characterized in that in step S4 according to the current signal,
The on off operating mode signal and the voltage signal judge that the whether correct method of current grid switching operation includes,
The judgment method of disconnecting switch closing operation correctness: if the current signal is greater than current threshold, and the on-off shape
State signal is closed state, then disconnecting switch closing operation is correct, otherwise disconnecting switch closing operation mistake；
The judgment method of disconnecting switch sub-switching operation correctness: if the voltage signal is greater than voltage threshold, and the on-off shape
State signal is off-state, then disconnecting switch sub-switching operation is correct, otherwise disconnecting switch sub-switching operation mistake.
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| CN201910737936.5A CN110531144A (en) | 2019-08-12 | 2019-08-12 | A kind of grid switching operation guide device and method |
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| CN201910737936.5A CN110531144A (en) | 2019-08-12 | 2019-08-12 | A kind of grid switching operation guide device and method |
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| CN210835055U (en) * | 2019-08-12 | 2020-06-23 | 珠海瓦特电力设备有限公司 | Switching operation guiding device |
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2019
- 2019-08-12 CN CN201910737936.5A patent/CN110531144A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106571688A (en) * | 2016-11-11 | 2017-04-19 | 广东电网有限责任公司揭阳供电局 | Method for monitoring operation mode of direct-current system and operation states of disconnecting switches |
| CN209044025U (en) * | 2018-09-12 | 2019-06-28 | 深圳供电局有限公司 | A kind of dual power supply direct current system bus connection switch combined floodgate self-checking unit |
| CN109596880A (en) * | 2018-11-28 | 2019-04-09 | 国家电网有限公司 | One kind being based on substation's alternating current-direct current down Monitor Unit system and monitoring method |
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| CN210835055U (en) * | 2019-08-12 | 2020-06-23 | 珠海瓦特电力设备有限公司 | Switching operation guiding device |
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