CN208607301U - Nuclear power station distribution board detection circuit and nuclear power station distribution board detection system - Google Patents
Nuclear power station distribution board detection circuit and nuclear power station distribution board detection system Download PDFInfo
- Publication number
- CN208607301U CN208607301U CN201820876395.5U CN201820876395U CN208607301U CN 208607301 U CN208607301 U CN 208607301U CN 201820876395 U CN201820876395 U CN 201820876395U CN 208607301 U CN208607301 U CN 208607301U
- Authority
- CN
- China
- Prior art keywords
- power supply
- nuclear power
- power station
- distribution board
- supply branch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model belongs to million kilowatt nuclear power station distribution board circuit detection technique field, provides a kind of million kilowatt nuclear power station distribution board detection circuit and million kilowatt nuclear power station distribution board detection system；The million kilowatt nuclear power station distribution board detection circuit includes: the power supply branch for being configured to transmission nuclear power energy；It is connect with the power supply branch, is configured to carry out the power supply branch protection location of zero-sequenceprotection；It is connect with the power supply branch, is configured to detect and show the current detecting unit of running current in the power supply branch；It is connect with the power supply branch, is configured to the power detecting unit of the power supply of monitoring used in nuclear power station electric equipment；Nuclear power station distribution board in traditional technology can be effectively solved by the utility model and is easy to appear detection failure, and detection circuit can not accurately detect the power supply of all used in nuclear power station electric equipments, and then the problem of damage used in nuclear power station electric equipment operational safety.
Description
Technical field
The utility model belongs to million kilowatt nuclear power station distribution board circuit detection technique field, more particularly to one kind million
Kilowatt nuclear-power station distribution board detection circuit and million kilowatt nuclear power station distribution board detection system.
Background technique
With the fast development of modern industry, nuclear power technology has the power supply safety of modern industrial society of crucial importance
Effect；Compared to traditional power supply mode, nuclear power station power supply has that output power, environmental pollution be small, the crowds such as low in cost
More advantages；In related nuclear power station power supply technique, power supply in the main nuclear power station distribution board of nuclear power station electric system is to core
Power station equipment equilibrium exports electric energy, however since the out-put supply in nuclear power station distribution board has biggish power and has
There is certain fluctuation, be easy to damage nuclear power disk distribution board power supply circuit and used in nuclear power station electric equipment, it is therefore desirable to
The fortune of the running current and used in nuclear power station electric equipment power supply in nuclear power station distribution board is detected using corresponding detection circuit
Market condition, to ensure the safety of nuclear power station distribution and the stability of power supply.
However, associated assay devices are set up directly on nuclear power station and are matched in traditional nuclear power station distribution board detection circuit
In electroplax main circuit power supply, when detection device breaks down, main circuit power supply power loss in nuclear power station distribution board, core will lead to
Power station distribution board is easy to appear power supply trouble；Detection circuit is set to inside used in nuclear power station electric equipment in traditional technology simultaneously, into
And the power conditions of all used in nuclear power station electric equipments can not be detected simultaneously by detection circuit, detection accuracy is low, is easy to produce
Detection error, related technical personnel can not understand in real time the power supply situation of used in nuclear power station electric equipment, core by detection circuit
Power station distribution board is easily in failure power supply state.
Utility model content
The utility model provides a kind of million kilowatt nuclear power station distribution board detection circuit and million kilowatt nuclear power station is matched
Electroplax detection system, it is intended to solve nuclear power station distribution board present in traditional technology and be easy to appear detection failure, and to nuclear power
The detection accuracy of power supply for electrical equipment of standing power supply is low, technical staff is difficult to understand the power supply of used in nuclear power station electric equipment in real time
The problem of situation.
The utility model first aspect provides a kind of million kilowatt nuclear power station distribution board detection circuit, comprising:
It is configured to the power supply branch of transmission nuclear power energy；
It is connect with the power supply branch, is configured to carry out the power supply branch protection location of zero-sequenceprotection；
It is connect with the power supply branch, is configured to detect and show the current detecting list of running current in the power supply branch
Member；
It is connect with the power supply branch, is configured to the power detecting unit of the power supply of monitoring used in nuclear power station electric equipment.
In one of them embodiment, the protection location includes:
It is configured to detection and generates the logic controller of zero-sequenceprotection signal according to the power supply branch center electric energy；And string
It connects in the power supply branch, the running current being configured in the power supply branch is more than the first open circuit that preset value then disconnects
Device.
In one of them embodiment, the power supply branch includes the three articles of firewires drawn by nuclear power station distribution board: the
One firewire, the second firewire and third firewire.
In one of them embodiment, the power detecting unit includes:
It is connect with the power supply branch, is configured to detect and show the voltage detecting mould of working voltage in the power supply branch
Block；
It is connect with the voltage detection module, is configured to monitor and acted according to working voltage generation in the power supply branch
The low-voltage relay module of signal；
It is connect with the low-voltage relay module, is configured to monitor the monitoring mould of the power supply of the nuclear power electrical equipment
Block.
In one of them embodiment, the voltage detection module includes: voltmeter, first fuse, the second fusing
Device, third fuse and the first fling-cut switch；
Wherein the first termination first firewire of the first fuse, described in the first termination of the second fuse
Second firewire, the first termination third firewire of the third fuse, the second end of the first fuse, described second
The second end of fuse and the second end of the third fuse are connected to the first end of first fling-cut switch altogether, and described
The second termination voltmeter of one fling-cut switch.
In one of them embodiment, the low-voltage relay module includes: the coil of low-voltage relay.
In one of them embodiment, the monitoring modular include: the coil of the first time-delay relay, first delay after
The normally-closed contact of electric appliance, the coil of intermediate relay, the first normally opened contact of intermediate relay, intermediate relay it is second normally opened
Contact, the third normally opened contact of intermediate relay, the 4th fuse, the 5th fuse, the 6th fuse, the 7th fuse, institute
State normally-closed contact, the second breaker, third breaker, indicator light and the second fling-cut switch of low-voltage relay；
Wherein, the first end of the coil of first time-delay relay and the first end of second breaker are connected to institute altogether
Low-voltage relay module is stated, the normally-closed contact of the second termination low-voltage relay of the coil of first time-delay relay
The first end of first end, the second end of the normally-closed contact of the low-voltage relay and the third breaker is connected to the low pressure altogether
Relay module, the second end of second breaker, the first input end of second fling-cut switch, the 4th fuse
First end and the intermediate relay coil first end be connected to altogether control power supply cathode, the third breaker
Second end, the second input terminal of second fling-cut switch, first time-delay relay normally-closed contact first end, described
The first end of first normally opened contact of intermediate relay, the first end of the second normally opened contact of the intermediate relay and described
The first end of the third normally opened contact of intermediate relay is connected to the first end of the 5th fuse altogether, and the indicator light is connected to
Between the second end of 4th fuse and the second end of the 5th fuse, the second of the coil of the intermediate relay
Terminate the second end of the normally-closed contact of first time-delay relay, the second of the first normally opened contact of the intermediate relay
End, the intermediate relay the second normally opened contact second end and the intermediate relay third normally opened contact second
End is connected to the anode of the control power supply altogether, and the first output end of second fling-cut switch is connect auxiliary by the 6th fuse
The cathode of power supply is helped, the second output terminal of second fling-cut switch is connecing the accessory power supply just by the 7th fuse
Pole.
In one of them embodiment, the current detecting unit include: current transformer, third fling-cut switch and
Ammeter；
Wherein, the primary side of the current transformer is coupled with the power supply branch, the secondary side of the current transformer
The first end of the third fling-cut switch is connect, the ammeter connects the second end of the third fling-cut switch.
The utility model second aspect provides a kind of million kilowatt nuclear power station distribution board detection system, including as described above
Million kilowatt nuclear power station distribution board detection circuit.
The utility model is relative to advantageous effects acquired by traditional technology are as follows: powers in above-mentioned nuclear power station distribution board
In detection circuit, it can detect and show the running current in power supply branch by current detecting unit, be by the running current
It can determine whether out whether the running current in nuclear power station distribution board is in abnormality, and current detecting unit is as independent inspection
Component is surveyed, the malfunction of itself does not interfere with the power supply state of nuclear power station distribution board power supply branch, to reduce
The rate of breakdown of nuclear power station distribution board；Zero-sequenceprotection can be carried out to power supply branch by protection location simultaneously, prevented abnormal
Nuclear power can damage the electric power component in nuclear power station distribution board；It can be examined precisely in real time by power detecting unit
The power supply for surveying used in nuclear power station electric equipment, prevents the too large or too small power supply of power from damaging to used in nuclear power station electric equipment,
And then comprehensively protect the power supply safety of nuclear power station distribution board and the operational safety of used in nuclear power station electric equipment；To efficiently solve
Nuclear power station distribution board is easy to appear detection failure in traditional technology, and is difficult to accurately detect by traditional detection circuit
The power supply situation of used in nuclear power station electric equipment out, and then the problem of damaged to the operation of used in nuclear power station electric equipment.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, for those skilled in the art, without creative efforts, can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is a kind of module knot of million kilowatt nuclear power station distribution board detection circuit provided by the embodiment of the utility model
Composition；
Fig. 2 is a kind of circuit structure diagram of protection location provided by the embodiment of the utility model；
Fig. 3 is a kind of function structure chart of power detecting unit provided by the embodiment of the utility model；
Fig. 4 is a kind of circuit structure diagram of power detecting unit provided by the embodiment of the utility model；
Fig. 5 is a kind of circuit structure diagram of current detecting unit provided by the embodiment of the utility model；
Fig. 6 is a kind of module knot of million kilowatt nuclear power station distribution board detection system provided by the embodiment of the utility model
Composition.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Fig. 1 shows the mould of million kilowatt nuclear power station distribution board detection circuit 10 provided by the embodiment of the utility model
Block structure illustrates only part relevant to the utility model embodiment, details are as follows for ease of description:
As shown in Figure 1, million kilowatt nuclear power station distribution board detection circuit 10 include: power supply branch L, protection location 101,
Current detecting unit 102 and power detecting unit 103；Wherein power supply branch L is configured to transmission nuclear power energy；Due to nuclear power unit
During the work time, the power for the electric energy that nuclear power station unit station exports outward is very big, and has stronger fluctuation, and the power supply
Medium of the branch L as transmission nuclear power energy, being capable of the biggish running current of transmission amplitude or working voltage；Protection location 101
It is connect with power supply branch L, 101 couples of power supply branch L of protection location carry out zero-sequenceprotection；Due to deliver core by the branch L that powers
Electric energy, if will have zero sequence in the branch L that powers when ground fault occur in nuclear power unit starting or nuclear power station power supply system
Electric current, the nuclear power that nuclear power unit is exported can will appear zero-sequence fault；Being powered in branch L at this time, there are unequal zero sequence electricity
Stream, this unstable nuclear power can will badly damaged nuclear power disk nuclear power station distribution board and used in nuclear power station electric equipment physics peace
Entirely；Therefore, when in power supply branch L there are when zero-sequence current, zero can be carried out to power supply branch L in real time by protection location 101
Sequence protection, and then comprehensively protect the power supply safety of nuclear power station distribution board and the operational safety of used in nuclear power station electric equipment.
Current detecting unit 102 is connect with power supply branch L, and current detecting unit 102 is detected and shown in power supply branch L and transports
Row electric current；Since the nuclear power that nuclear power unit is exported can have greatly unstability, the running current in the branch L that powers
Also there can be biggish fluctuation, and the biggish running current of fluctuating range also can be to the electric power member device in nuclear power station distribution board
Part and used in nuclear power station electric equipment cause biggish damage；Therefore, in million kilowatt nuclear power station distribution board detection circuit 10, lead to
For excessive current detection unit 102 come the running current detected and in real-time display power supply branch L, related technical personnel can in real time, directly
The case where ground understands nuclear power station distribution board exported nuclear power energy is seen, the biggish fluctuation of running current appearance in prevention power supply branch L,
The operational safety of nuclear power station distribution board and used in nuclear power station electric equipment is protected simultaneously.
It should be noted that the mould of million kilowatt nuclear power station distribution board detection circuit 10 shown in 1 with reference to the accompanying drawings
Block structure, current detecting unit 102 are connect with power supply branch L, can realize electricity by the nuclear power in access power supply branch L
Flow the function of accurately detecting；Therefore, because current detecting unit 102 is used as an independent detection part, current detecting unit
102 are not serially connected in directly in power supply branch L, if current detecting unit 102 itself is without failure, will not influence power supply
Normal operating conditions in branch L, the branch L that powers at this time still normally exports nuclear power energy, and then guarantees used in nuclear power station electric equipment energy
It is enough constantly to obtain electric energy, to maintain to work normally；Match at the million kilowatt nuclear power station provided by the utility model embodiment
In electroplax detection circuit 10, power supply branch L and current detecting unit 102 independently work；On the one hand, pass through current detecting list
Member 102 can accurately detect and show running current in power supply branch L, and nuclear power station distribution board is avoided to be in over-voltage/overcurrent
Operating status；On the other hand, since current detecting unit 102 is not serially connected in directly in power supply branch L, current detecting unit
102, which itself break down, does not interfere with the normal operating condition of power supply branch L, avoids nuclear power station distribution board and detects
The situation of failure.
Power detecting unit 103 is connect with power supply branch L, and power detecting unit 103 monitors the confession of used in nuclear power station electric equipment
Power supply；Wherein input power of the power supply as used in nuclear power station electric equipment can be set by power supply to nuclear power station electricity consumption
It is standby that stable nuclear power energy is provided, if power supply exception occurs or power supply stops output, then nuclear power station electricity consumption at this time
Equipment is likely to be at abnormal operating condition or power loss shuts down operating status；It should be noted that the power supply includes
The nuclear power energy etc. transmitted in the control power supply of nuclear power station, the accessory power supply of nuclear power station and power supply branch L；When nuclear power station electricity consumption is set
When abnormal or complete stopping output occurring in standby power supply, technical staff can be accurately by power detecting unit 103
Monitoring obtains all used in nuclear power station electric equipment practical operation situations, avoids unstable nuclear power that from capable of causing to used in nuclear power station electric equipment
Damage or used in nuclear power station electric equipment are chronically at the operating status of power loss shutdown.
Optionally, the used in nuclear power station electric equipment in the utility model embodiment is nuclear power station motor.
Pass through protection when zero-sequence fault occurs in the branch L that powers in nuclear power station distribution board by the utility model embodiment
101 couples of power supply branch L of unit take zero-sequenceprotection measure in time, and then zero-sequence current can be prevented to nuclear power station distribution board and nuclear power
Electrical equipment of standing damages；Current detecting unit 102 can be realized by the nuclear power in access power supply branch L for electric current
The function of detection and display, and current detecting unit 102 is not serially connected in directly in power supply branch L, current detecting unit
102 failures itself will not influence the operating condition of power supply branch L, therefore both can be accurate by current detecting unit 102
Ground detects that detection failure can occur also in power supply branch L to avoid nuclear power station distribution board in running current, ensure that nuclear power station
The normal operation of distribution board and used in nuclear power station electric equipment；Meanwhile used in nuclear power station can accurately be monitored by power detecting unit 103
The power supply situation of electric equipment avoids the power supply failure of used in nuclear power station electric equipment or used in nuclear power station electric equipment long
Phase is in the case where power loss is shut down, and then comprehensively safeguards the operational safety of used in nuclear power station electric equipment.
As an alternative embodiment, in above-mentioned million kilowatt nuclear power station distribution board detection circuit 10, it is such as attached
Shown in Fig. 1, power supply branch L includes three articles of firewires that nuclear power station distribution board is drawn: the first firewire L1, the second firewire L2 and the
Three firewire L3 transmit three road electric currents by this three firewires, therefore nuclear power station distribution board is exportable high-power by power supply branch L
Nuclear power energy.
As an alternative embodiment, Fig. 2 shows protection locations 101 provided by the embodiment of the utility model
Circuit structure, protection location 101 include logic controller 1011 and the first breaker J1, and wherein logic controller 1011 detects simultaneously
Zero-sequenceprotection signal can be generated according to the nuclear power of power supply branch L；The zero-sequenceprotection signal is used to carry out zero sequence guarantor to power supply branch L
Shield operation, as noted previously, as when occurring ground fault in the power supply system of nuclear power station, it will cause power branch L occur compared with
Big zero-sequence current, the abnormal nuclear power that can prevent power supply branch L from exporting in zero-sequence fault by logic controller 101 at this time
Used in nuclear power station electric equipment can be damaged；It should be noted that the logic controller 1011 in the utility model embodiment is made
For common, existing device a kind of in nuclear power field, those skilled in the art can by existing disclosed nuclear power technology data come
Know the internal circuit configuration and its control principle of logic controller 1011；Certainly, those skilled in the art can also be used
The logic control in zero-sequenceprotection circuit (such as zero sequence current mutual inductor) Lai Shixian the utility model embodiment in traditional technology
Device 1011.
First breaker J1 is serially connected in power supply branch L, when the running current in the branch L that powers is more than preset value, the
Even if a breaker J1 is disconnected, to prevent over-current phenomenon avoidance from damaging to used in nuclear power station electric equipment and nuclear power station distribution board；Wherein
The preset value is to be preset according to the physical parameter of nuclear power distribution board；As noted previously, as nuclear power unit is generating
When nuclear power energy, the nuclear power externally exported can be extremely unstable, if the running current in power supply branch L occurs excessive, the
One breaker J1 is disconnected in time, and power supply branch L will not correspond to the nuclear power energy of output abnormality, to prevent overcurrent/over-voltage phenomenon
Used in nuclear power station electric equipment and nuclear power station distribution board are damaged.
Therefore, the circuit structure of the protection location 101 gone out according to Fig.2, it is disconnected by logic controller 1011 and first
Road device J1, which can carry out zero-sequenceprotection again to power supply branch L, can prevent power supply branch L from exporting excessive electric current, so realization for
Comprehensive protection of nuclear power station distribution board and used in nuclear power station electric equipment.
As an alternative embodiment, Fig. 3 shows power detecting unit 103 provided by the embodiment of the utility model
Modular structure, as shown in figure 3, the power detecting unit 103 includes: voltage detection module 1031, low-voltage relay module
1032 and monitoring modular 1033；Wherein voltage detection module 1031 is connect with power supply branch L, and voltage detection module 1031 accesses
Nuclear power energy in power supply branch L detects and shows working voltage in power supply branch L, since the nuclear power in power supply branch L can exist
Unstability, thus by voltage detection module 1031 can real-time detection and show power supply branch L in working voltage, so as to technology
Personnel can intuitively understand the power output situation of nuclear power station distribution board.
Low-voltage relay module 1032 is connect with voltage detection module 1031, and low-voltage relay module 1032 and voltage are examined
It surveys module 1031 to connect, the monitoring of low-voltage relay module 1032 simultaneously generates action signal according to the working voltage in power supply branch L；
Specifically, when low-voltage relay module 1032 accesses the nuclear power energy in power supply branch L by voltage detection module 1031, by
Has the function of monitoring for the working voltage in power supply branch L in low-voltage relay module 1032, in the branch L that powers at that time
Working voltage be lower than low-voltage relay module 1032 itself threshold value when, then illustrate power branch L center electric energy be in it is under-voltage
State, low-voltage relay module 1032 issues action signal at this time, which has stopped for controlling the power supply
Full output, used in nuclear power station electric equipment avoid used in nuclear power station electric equipment due to not having inputing power and then power loss is caused to be shut down
It is chronically at under-voltage operation, to realize comprehensive protection for used in nuclear power station electric equipment.
Monitoring modular 1033 is connect with low-voltage relay module 1032, and monitoring modular 1033 monitors used in nuclear power station electric equipment
Power supply；It needs to illustrate again, power supply herein includes: in control power supply, accessory power supply and power supply branch L
The nuclear power energy exported, while considering the special operation demand of used in nuclear power station electric equipment, it can be real by monitoring modular 1033
When monitor used in nuclear power station electric equipment power supply abnormal conditions, the power supply abnormal conditions include but is not limited to: power supply
Power supply stops output completely, power supply is in under-voltage condition.
According to the modular structure of above-mentioned power detecting unit 103, real-time detection and can be shown by voltage detection module 1031
Show working voltage in power supply branch L, the power supply of used in nuclear power station electric equipment, Jin Ertong can be monitored by monitoring modular 1033
Zenith tracking module 1031 and monitoring modular 1033 can monitor the operation of nuclear power station distribution board and used in nuclear power station electric equipment in real time
Situation avoids abnormal electric current or voltage from damaging nuclear power distribution board and used in nuclear power station electric equipment；Pass through low pressure simultaneously
Relay module 1032, which issues action signal, can prevent used in nuclear power station electric equipment be in under-voltage operating status, so realization for
The comprehensive monitoring of used in nuclear power station electric equipment.
As an alternative embodiment, Fig. 4 shows power detecting unit 103 provided by the embodiment of the utility model
Circuit structure；Wherein, voltage detection module 1031 includes: voltmeter V0, first fuse FU1, second fuse FU2,
Three fuse FU3 and the first fling-cut switch K1；The first termination the first firewire L1, second fuse FU2 of first fuse FU1
First termination the second firewire L2, third fuse FU3 first termination third firewire L3, the second end of first fuse FU1,
The second end of second fuse FU2 and the second end of third fuse FU3 are connected to the first end A of the first fling-cut switch K1 altogether,
The second end B of first fling-cut switch K1 meets voltmeter V0.
In voltage detection module 1031, pass through three fuses (first fuse FU1, second fuse FU2 and
Three fuse FU3) access power supply branch L in nuclear power energy, these three fuses can play each in power detecting unit 103
Electric power component carries out the effect of overvoltage protection, prevents the working voltage of power supply branch L excessive, in power detecting unit 103
The problem of each electric power component damages.
It should be noted that fling-cut switch is as common in technical field of nuclear power, existing multi selector switch component, sheet
Field personnel can consult existing nuclear power technology data to understand the internal structure of fling-cut switch and conducting principle；According to this field
Basic electronics common sense, one end of fling-cut switch has multiple selection contacts, and the other end of fling-cut switch also has multiple selections
Contact；For the first fling-cut switch K1 shown in Fig. 4, the first end A of the first fling-cut switch K1 includes three contacts:
A1,A2,A3；The second end B of first fling-cut switch K1 includes four contacts: B1, B2, B3, B4；By the way that the first fling-cut switch is connected
Contact different in both ends in K1, voltmeter V0 can be detected the working voltage in power supply branch L in different firewires；Due to first
Fling-cut switch K1 has the function of selection conducting, therefore can be detected more accurately by voltmeter V0 and show power supply branch L
In working voltage situation, reduce voltage detection error.
According to the circuit structure of above-mentioned voltage detection module 1031, the first fling-cut switch K1 can be used for the conducting of control circuit
Or shutdown, three fuses (first fuse FU1, second fuse FU2 and third fuse FU3) can prevent power supply branch
Excessive working voltage damages the electric power component in power detecting unit 103 in the L of road, and voltmeter V0 can real-time display
And working voltage in power supply branch L is detected, so that technical staff can understand in real time the operation in power supply branch L by voltmeter V0
Voltage swing.
As an alternative embodiment, as shown in figure 4, low-voltage relay module 1032 includes the line of low-voltage relay
JA3-1 is enclosed, low-voltage relay module 1032 meets power supply branch L by first fuse FU1 and second fuse FU2, works as power supply
Nuclear power can be transmitted in low-voltage relay module 1032 by branch L, the operation in 1032 couples of power supply branch L of low-voltage relay module
Voltage is monitored and generates action signal, by the action the power supply of signal control used in nuclear power station electric equipment；Low pressure after
Working voltage in the coil JA3-1 access power supply branch L of electric appliance, and the contact of low-voltage relay is set to monitoring modular 1033
In, when the coil JA3-1 of low-voltage relay obtains electric, i.e., the contact of controllable low-voltage relay executes corresponding movement, in turn
Realize the control of the power supply for used in nuclear power station electric equipment.
As an alternative embodiment, as shown in figure 4, monitoring modular 1033 includes: the line of the first time-delay relay
Enclose JA1-1, the normally-closed contact JA1-2 of the first time-delay relay, the coil JA2-1 of intermediate relay, intermediate relay first
Normally opened contact JA2-2, the second normally opened contact JA2-3 of intermediate relay, the third normally opened contact JA2-4 of intermediate relay,
Four fuse FU4, the 5th fuse FU5, the 6th fuse FU6, the 7th fuse FU7, low-voltage relay normally-closed contact
JA3-2, the second breaker J2, third breaker J3, indicator light LA and the second fling-cut switch K2.
Wherein, the first end of the coil JA1-1 of the first time-delay relay and the first end of the second breaker J2 are connected to low altogether
Potential relay module 1032, the normally-closed contact JA3-2 of the second termination low-voltage relay of the coil JA1-1 of the first time-delay relay
First end, the second end of the normally-closed contact JA3-2 of low-voltage relay and the first end of third breaker J3 be connected to altogether low pressure after
Electrical appliance module 1032, the second end of the second breaker J2, the first input end A1 of the second fling-cut switch K2, the 4th fuse FU4
First end and intermediate relay coil JA2-1 first end be connected to altogether control power supply cathode, third breaker J3's
Second end, the second input terminal A2 of the second fling-cut switch K2, the first time-delay relay normally-closed contact JA1-2 first end, in
Between the first end of the first normally opened contact JA2-2 of relay, intermediate relay the second normally opened contact JA2-3 first end with
And the first end of the third normally opened contact JA2-4 of intermediate relay is connected to the first end of the 5th fuse FU5 altogether, indicator light LA connects
It connects between the second end of the 4th fuse FU4 and the second end of the 5th fuse FU5, the coil JA2-1's of intermediate relay
The second end of the normally-closed contact JA1-2 of second the first time-delay relay of termination, the first normally opened contact JA2-2's of intermediate relay
Second end, intermediate relay the second normally opened contact JA2-3 second end and intermediate relay third normally opened contact JA2-4
Second end be connected to the anode of control power supply altogether, the first output end B1 of the second fling-cut switch K2 connect by the 6th fuse FU6
The second output terminal B2 of the cathode of accessory power supply, the second fling-cut switch K2 connects the anode of accessory power supply by the 7th fuse FU7.
According to the circuit structure of above-mentioned monitoring modular 1033, the core in power supply, accessory power supply and power supply branch L is controlled
Electric energy collectively constitutes the power supply of used in nuclear power station electric equipment, and the operation shape of used in nuclear power station electric equipment is shown by indicator light LA
State carries out overcurrent/overcurrent protection to indicator light LA by the 4th fuse FU4 and the 5th fuse FU5；Specifically, when control
When nuclear power in power supply, accessory power supply and power supply branch L can be simultaneously stopped output between this three, indicator light LA just can not
It is bright, used in nuclear power station electric equipment is then said at this time there is no electric energy input, and power supply stops output, and used in nuclear power station electric equipment stops work
Make；If any one of (nuclear power energy in control power supply, accessory power supply and power supply branch L) power supply can be normal defeated in this three
Out when electric energy, then illustrate that power supply still exports nuclear power energy to used in nuclear power station electric equipment, used in nuclear power station electric equipment is able to maintain
It runs well, indicator light LA shines；To show the operation feelings of used in nuclear power station electric equipment by the luminance of indicator light LA
Condition and nuclear power station distribution board export power levels.
In order to which the working principle of low-voltage relay module 1032 and monitoring modular 1033 is better described, below with reference to Fig. 4,
It will be illustrated by a specific example, the operation of used in nuclear power station electric equipment is divided into two stages, specific as follows:
Normal operating phase: when the power supply of nuclear power station is in normal output state, the working voltage in the branch L that powers
In normal amplitude, low-voltage relay module 1032 monitors the working voltage in power supply branch L, the coil of low-voltage relay
JA3-1 obtains electric, and the normally-closed contact JA3-2 of low-voltage relay is disconnected, the coil JA2-1 power loss of intermediate relay, the first delay after
The normally-closed contact JA1-2 of electric appliance is closed after certain delay time, the coil JA2-1 of intermediate relay obtain it is electric, it is intermediate after
The third of first normally opened contact JA2-2 of electric appliance, the second normally opened contact JA2-3 of intermediate relay and intermediate relay are normal
Contact JA2-4 closure is opened, so that indicator light LA normal luminous, then illustrates that used in nuclear power station electric equipment is at this time and operate normally shape
State.
Failure phase: if the working voltage in power supply branch L is in under-voltage condition, low-voltage relay module 1032 is examined
The working voltage surveyed in power supply branch L simultaneously generates action signal, controls power supply and accessory power supply and stops output, low-voltage relay
Normally-closed contact JA3-2 is remained closed, and the coil JA1-1's of the first time-delay relay obtains electric, the normally closed touching of the first time-delay relay
Point JA1-2 is disconnected after certain delay time, the coil JA2-1 power loss of intermediate relay, and the first of intermediate relay is often
The third normally opened contact JA2-4 for opening contact JA2-2, the second normally opened contact JA2-3 of intermediate relay and intermediate relay is same
When disconnect, since the nuclear power of power supply branch L output can not maintain used in nuclear power station electric equipment to run well, and control
Power supply and accessory power supply stop output, and the power supply for being equivalent to used in nuclear power station electric equipment stops exporting completely, at this time indicator light
LA does not work, and used in nuclear power station electric equipment stops working completely；Therefore technical staff can know precisely nuclear power by indicator light LA
The operating condition for electrical equipment of standing and the power output situation of nuclear power station distribution board.
In monitoring modular 1033, the function of the 6th fuse FU6 and the 7th fuse FU7 for preventing accessory power supply from exporting
Rate is excessive and then damages to used in nuclear power station electric equipment；Second fling-cut switch K2, the second breaker J2 and third breaker
J3 can be used for the conducting or shutdown of manually or automatically control circuit.
Therefore, according to the circuit structure of above-mentioned monitoring modular 1033, nuclear power station can accurately be shown by indicator light LA
The working condition of electrical equipment；If indicator light LA is bright, power supply is normally exported, and used in nuclear power station electric equipment runs well；If
Indicator light LA does not work, and the nuclear power of nuclear power station distribution board output can be abnormal, and power supply stops output, and used in nuclear power station electric equipment is complete
It shuts down；And then can accurately monitor to obtain the practical operation situation of used in nuclear power station electric equipment in real time by indicator light LA, with
The operational safety of protection used in nuclear power station electric equipment comprehensively.
As an alternative embodiment, Fig. 5 shows current detecting unit 102 provided by the embodiment of the utility model
Circuit structure；As shown in figure 5, current detecting unit 102 includes Current Transmit, third fling-cut switch K3 and ammeter
A1；Wherein, the primary side of Current Transmit is coupled with power supply branch L, and the secondary third switching that flanks of Current Transmit is opened
The first end A of K3 is closed, ammeter A1 meets the second end B of third fling-cut switch K3.
It should be noted that third fling-cut switch K3 and above-mentioned first fling-cut switch K1 herein is in function and internal junction
Structure is similar, and therefore, the function and internal structure of third fling-cut switch K3 can refer to above for the text of the first fling-cut switch K1
Word description, details are not described herein again.
According to the circuit structure of above-mentioned current detecting unit 102, ammeter A1 connects power supply branch by third fling-cut switch K3
Road L, therefore the running current in power supply branch L can accurately can be measured by ammeter A1；And it is shown in Fig. 5
102 circuit structure of current detecting unit, ammeter A1 be directly serially connected in power supply branch L in, but by electric current it is mutual
The primary side of sensor CT is coupled with power supply branch L, with the nuclear power energy accessed in power supply branch, is realized for the branch L that powers
The detection and display of middle running current；Therefore the ammeter A1 in the utility model embodiment is not serially connected in power supply branch directly
In L, current detecting unit 102 is used as an independent detection part, if current detecting unit 102 itself breaks down, simultaneously
The operating status that will not influence power supply branch L subtracts to ensure that nuclear power station distribution board can constantly export nuclear power energy outward
The rate of breakdown of power supply branch L is lacked.
Fig. 6 shows the mould of million kilowatt nuclear power station distribution board detection system 60 provided by the embodiment of the utility model
Block structure, as shown in fig. 6, million kilowatt nuclear power station distribution board detection system 60 includes million kilowatt nuclear power as described above
It stands distribution board detection circuit 10, as noted previously, as can be accurately by million kilowatt nuclear power station distribution board detection circuit 10
It detects the operating condition of used in nuclear power station electric equipment, and reduces the power supply trouble of nuclear power station distribution board；To by this million
When kilowatt nuclear-power station distribution board detection system 60 is applied to nuclear power station electric system, it can effectively guarantee the stabilization of nuclear power station
Operation, and then safeguard the power supply safety of industrial society.
Pass through guarantor in above-mentioned million kilowatt nuclear power station distribution board detection circuit 10 by the utility model embodiment
Zero-sequenceprotection can be carried out to power supply branch L by protecting unit 101, and then prevent zero-sequence current to nuclear power station distribution board and nuclear power station electricity consumption
Equipment damages；It can be detected by the indicator light LA in power detecting unit 103 and show the confession of used in nuclear power station electric equipment
Power supply；When indicator light LA is bright, then used in nuclear power station electric equipment is in normal operating condition；If indicator light LA does not work, for
Used in nuclear power station electric equipment is in power loss shutdown status, therefore technical staff can be accurately detected by power detecting unit 103
The power supply of used in nuclear power station electric equipment out, and then obtain the practical operation situation of used in nuclear power station electric equipment；Meanwhile current detecting
Ammeter A1 in unit 102 can be used for detecting running current in power supply branch L, due to ammeter in the utility model embodiment
A1 is not serially connected in directly in power supply branch L, but accesses nuclear power energy by Current Transmit, and then realize for power supply
The accurate detection of running current in branch L, current detecting unit 102 and power supply branch L work independently, current detecting unit 102
The malfunction of itself will not influence the operating status in power supply branch L, and efficiently avoiding nuclear power station distribution board may go out
Existing detection failure, and then the million kilowatt nuclear power station distribution board detection circuit 10 in the utility model embodiment is comprehensively tieed up
The operational safety of nuclear power station distribution board and used in nuclear power station electric equipment is protected；It solves nuclear power station distribution board in traditional technology to be easy
It now detects failure, be difficult to accurately detect the power supply of used in nuclear power station electric equipment and used in nuclear power station electric equipment is easily in
The problem of failure operation.
It should be noted that, in this document, such as multiple and a variety of etc quantity referred both to greater than 1；Such as the first He
Second etc relational terms are used merely to distinguish an entity with another entity, without necessarily requiring or implying
There are any actual relationship or orders between these entities.And the terms "include", "comprise" or any other
Variant is intended to non-exclusive inclusion, so that the element that product or structure including a series of elements are intrinsic.
In the absence of more restrictions, the element limited by sentence " including ... " or " including ... ", it is not excluded that wrapping
Include in process, method, article or the terminal device of the element that there is also other elements.In addition, herein, it is " big
In ", " being less than ", " being more than " etc. be interpreted as not including this number；" more than ", " following ", " within " etc. be interpreted as including this number.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (9)
1. a kind of nuclear power station distribution board detection circuit, the nuclear power station is million kilowatt nuclear power station, which is characterized in that the core
Power station distribution board detection circuit includes:
It is configured to the power supply branch of transmission nuclear power energy；
It is connect with the power supply branch, is configured to carry out the power supply branch protection location of zero-sequenceprotection；
It is connect with the power supply branch, is configured to detect and show the current detecting unit of running current in the power supply branch；
It is connect with the power supply branch, is configured to the power detecting unit of the power supply of monitoring used in nuclear power station electric equipment.
2. nuclear power station distribution board detection circuit according to claim 1, which is characterized in that the protection location includes:
It is configured to detection and generates the logic controller of zero-sequenceprotection signal according to the power supply branch center electric energy；And it is serially connected in
In the power supply branch, the running current being configured in the power supply branch is more than the first breaker that preset value then disconnects.
3. nuclear power station distribution board detection circuit according to claim 1, which is characterized in that the power supply branch includes by core
Three firewires that power station distribution board is drawn: the first firewire, the second firewire and third firewire.
4. nuclear power station distribution board detection circuit according to claim 3, which is characterized in that the power detecting unit packet
It includes:
It is connect with the power supply branch, is configured to detect and show the voltage detection module of working voltage in the power supply branch；
It is connect with the voltage detection module, be configured to monitoring and action signal is generated according to working voltage in the power supply branch
Low-voltage relay module；
It is connect with the low-voltage relay module, is configured to monitor the monitoring modular of the power supply of the nuclear power electrical equipment.
5. nuclear power station distribution board detection circuit according to claim 4, which is characterized in that the voltage detection module packet
It includes: voltmeter, first fuse, second fuse, third fuse and the first fling-cut switch；
Wherein the first termination first firewire of the first fuse, the first termination described second of the second fuse
Firewire, the first termination third firewire of the third fuse, the second end of the first fuse, second fusing
The second end of device and the second end of the third fuse are connected to the first end of first fling-cut switch altogether, and described first throws
Cut the second termination voltmeter closed.
6. nuclear power station distribution board detection circuit according to claim 4, which is characterized in that the low-voltage relay module packet
It includes: the coil of low-voltage relay.
7. nuclear power station distribution board detection circuit according to claim 6, which is characterized in that the monitoring modular includes:
The coil of one time-delay relay, the normally-closed contact of the first time-delay relay, the coil of intermediate relay, intermediate relay first
Normally opened contact, the second normally opened contact of intermediate relay, the third normally opened contact of intermediate relay, the 4th fuse, the 5th are melted
Disconnected device, the 7th fuse, the normally-closed contact of the low-voltage relay, the second breaker, third breaker, refers to the 6th fuse
Show lamp and the second fling-cut switch；
Wherein, the first end of the coil of first time-delay relay and the first end of second breaker are connected to described low altogether
Potential relay module, the first of the normally-closed contact of the second termination low-voltage relay of the coil of first time-delay relay
The first end of end, the second end of the normally-closed contact of the low-voltage relay and the third breaker is connected to the low pressure relay altogether
Device module, the second end of second breaker, the first input end of second fling-cut switch, the 4th fuse
The first end of the coil of one end and the intermediate relay be connected to altogether control power supply cathode, the second of the third breaker
End, the second input terminal of second fling-cut switch, the first end of the normally-closed contact of first time-delay relay, the centre
First end, the first end of the second normally opened contact of the intermediate relay and the centre of first normally opened contact of relay
The first end of the third normally opened contact of relay is connected to the first end of the 5th fuse altogether, and the indicator light is connected to described
Between the second end of 4th fuse and the second end of the 5th fuse, the second termination of the coil of the intermediate relay
The second end of the normally-closed contact of first time-delay relay, the second end of the first normally opened contact of the intermediate relay, institute
The second end for stating the second end of the second normally opened contact of intermediate relay and the third normally opened contact of the intermediate relay is total
It is connected to the anode of the control power supply, the first output end of second fling-cut switch connects auxiliary electricity by the 6th fuse
The cathode in source, the second output terminal of second fling-cut switch connect the anode of the accessory power supply by the 7th fuse.
8. nuclear power station distribution board detection circuit according to claim 1, which is characterized in that the current detecting unit packet
It includes: current transformer, third fling-cut switch and ammeter；
Wherein, the primary side of the current transformer is coupled with the power supply branch, and the secondary of the current transformer flanks institute
The first end of third fling-cut switch is stated, the ammeter connects the second end of the third fling-cut switch.
9. a kind of nuclear power station distribution board detection system, the nuclear power station is million kilowatt nuclear power station, which is characterized in that the core
Power station distribution board detection system includes such as the described in any item nuclear power station distribution board detection circuits of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820876395.5U CN208607301U (en) | 2018-06-07 | 2018-06-07 | Nuclear power station distribution board detection circuit and nuclear power station distribution board detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820876395.5U CN208607301U (en) | 2018-06-07 | 2018-06-07 | Nuclear power station distribution board detection circuit and nuclear power station distribution board detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208607301U true CN208607301U (en) | 2019-03-15 |
Family
ID=65662646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820876395.5U Active CN208607301U (en) | 2018-06-07 | 2018-06-07 | Nuclear power station distribution board detection circuit and nuclear power station distribution board detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208607301U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514934A (en) * | 2019-09-10 | 2019-11-29 | 苏州热工研究院有限公司 | A kind of low-tension distribution board power supply reliability analysis method and system |
-
2018
- 2018-06-07 CN CN201820876395.5U patent/CN208607301U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514934A (en) * | 2019-09-10 | 2019-11-29 | 苏州热工研究院有限公司 | A kind of low-tension distribution board power supply reliability analysis method and system |
| CN110514934B (en) * | 2019-09-10 | 2021-07-30 | 苏州热工研究院有限公司 | Power supply reliability analysis method and system for low-voltage distribution board |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107290676B (en) | Method and device for detecting fusing and open circuit of main fuse of storage battery pack | |
| CN207352393U (en) | A kind of fault detector | |
| CN108375711A (en) | A kind of insulating monitoring method of bipolar earth-free HVDC power-supply systems | |
| CN102364819B (en) | Power supply apparatus taking leakage current of disk insulator as energy | |
| CN203674567U (en) | Comprehensive distribution box | |
| CN208607301U (en) | Nuclear power station distribution board detection circuit and nuclear power station distribution board detection system | |
| CN103869202A (en) | Transformer high-tension side phase-failure detection method and system | |
| CN103163419B (en) | Indicator and method for cable core correction and transformer tripping outlet correction | |
| CN207853440U (en) | A kind of intelligent universal circuit breaker | |
| CN204696056U (en) | A kind of circuit breaker of Novel belt circuit checker | |
| CN211046116U (en) | Intelligent second grade block terminal is used to job site | |
| CN111077475A (en) | Low-voltage line ground fault indicator | |
| CN206775374U (en) | Voltage-source type frequency converter detecting system | |
| CN105513253A (en) | Low-voltage distribution cabinet fire alarm system | |
| CN106546796A (en) | A kind of voltage detecting circuit | |
| CN114355250A (en) | Detection apparatus based on low-voltage electrical fault | |
| KR102286629B1 (en) | Solar power generation system with fire prediction algorithm and blocking function | |
| CN207301792U (en) | A kind of interface test system between DC control system and stabilized control system | |
| CN110165637B (en) | Line protection method, system and device for inverter type power supply access | |
| Wu et al. | Research on fault isolation technology and device development of LVDC system | |
| KR100532925B1 (en) | Detection techniques of line-to-earth fault section in ungrounded network base on distribution automation | |
| CN205178472U (en) | Earth -free power supply system of neutral point with ground connection protect function | |
| CN204334468U (en) | A kind of photovoltaic combiner box with lightning protection early warning failure function | |
| CN210743152U (en) | Offshore monitoring system for secondary power supply fault of medium-voltage switch cabinet | |
| CN211878487U (en) | Monitoring voltage and current on power line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |