CN110429608A - A kind of network system and its disconnection device and Splitting Control - Google Patents
A kind of network system and its disconnection device and Splitting Control Download PDFInfo
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- CN110429608A CN110429608A CN201910764900.6A CN201910764900A CN110429608A CN 110429608 A CN110429608 A CN 110429608A CN 201910764900 A CN201910764900 A CN 201910764900A CN 110429608 A CN110429608 A CN 110429608A
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- phase voltage
- voltage
- threshold value
- protection threshold
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
This application discloses a kind of network system and its disconnection device and Splitting Control, which is applied to the disconnection device installed in the network system for having water power grid-connected, comprising: obtains the phase voltage of the Hydropower Unit in grid-connected small hydropower station；Judge whether the voltage variety of phase voltage is greater than preset value；If voltage variety is greater than preset value, judge whether phase voltage exceeds protection threshold value；If phase voltage, beyond protection threshold value, the relay module output tripping into disconnection device controls signal, so that relay module disconnects the connection switch of Hydropower Unit and network system；If voltage variety is not more than preset value, protection threshold value is updated according to phase voltage.The application carries out adaptive dynamic in real time to protection threshold value based on the phase voltage in reasonable fluctuation range and adjusts, it is ensured that protects the reasonability of threshold value and the timeliness of adjustment, is effectively applicable to a variety of operating conditions of network system, has ensured the operational safety of network system.
Description
Technical field
This application involves electric power network technique field, in particular to a kind of network system and its disconnection device and off-the-line controlling party
Method.
Background technique
Mountain area power grid hydroelectric resources is abundant, and a large amount of substations have that water power is grid-connected, and small hydropower station mainly passes through 10kV route simultaneously
Net, and major part T is connected to 10kV feeder line has formed distant place water power and has collected step by step, concentrate boosting, high-power send outside at a distance
Development model, as shown in Figure 1.Sending under this mode, generator are concatenated into substation, the transimission power on 10kV feeder line
It is sent in reduction or power and small power station exports idle support, the voltage along each load bus of feeder line is made to be elevated (UA<UB<
UC).Therefore, the voltage of distribution rear end is easy with changes of operating modes fluctuation, causes the voltage of some load bus inclined
It moves exceeded.
Disconnection device is the important protective device of one kind used in power grid.When electric system is interfered, stability
By destroy so that enable lose synchronism between generator when, electric system is just transitioned into asynchronous oscillatory regime, can pass through at this time
Disconnection device cuts off the connection between two asynchronous parts, resolves into the part of two compartments, is terminated with reaching
Asynchronous oscillation ensures the purpose that power grid operates normally.The process is known as off-the-line.
The important islanding control parameter of one of disconnection device is the protection threshold value of voltage, it is triggering disconnection device movement
Key parameter.In the prior art, the protection threshold value of disconnection device is mostly definite value, is needed by relay protection staff or power station
Maintenance personnel manually sets protection threshold value, thus it is poor to the modification timeliness of protection threshold value, it cannot be with operation of power networks
The variation of mode is completed to reasonably adjust in time, and disconnection device is led to problems such as malfunction or tripping occur.
It has been that those skilled in the art need to pay close attention in consideration of it, providing a kind of scheme for solving above-mentioned technical problem
's.
Summary of the invention
The application's is designed to provide a kind of network system and its disconnection device and Splitting Control, effectively to mention
The timeliness and reasonability of high islanding control, automatically adapt to different grid operation modes, avoid the occurrence of the mistake of disconnection device
Dynamic and tripping ensures safe operation of electric network.
In order to solve the above technical problems, in a first aspect, this application discloses a kind of Splitting Control, applied to there is water power
The disconnection device installed in grid-connected network system, the Splitting Control include:
Obtain the phase voltage of the Hydropower Unit in grid-connected small hydropower station；
Judge whether the voltage variety of the phase voltage is greater than preset value；
If the voltage variety is greater than the preset value, judge whether the phase voltage exceeds protection threshold value；If institute
Phase voltage is stated beyond the protection threshold value, then the relay module output tripping into the disconnection device controls signal, so as to
The relay module disconnects the connection switch of the Hydropower Unit Yu the network system；
If the voltage variety is not more than the preset value, the protection threshold value is carried out more according to the phase voltage
Newly.
Optionally, whether the voltage variety for judging the phase voltage is greater than preset value, comprising:
Judge the phase voltage whether within the scope of default reasonable voltage；
If so, the step of whether the starting voltage variety for judging the phase voltage is greater than preset value；
If it is not, the then alarm indicating module outputting alarm signal into the disconnection device, so that the alarm indicates mould
Block carries out abnormality alarming.
It is optionally, described that the protection threshold value is updated according to the phase voltage, comprising:
The protection threshold value is updated according to default adjustment formula, the default adjustment formula are as follows:
Uset (t)=kU (t)；
Wherein, U (t) is the phase voltage；K is preset ratio coefficient；Uset (t) is the protection threshold value.
Optionally, the phase voltage for obtaining the Hydropower Unit in grid-connected small hydropower station, comprising:
Obtain the three-phase voltage of the Hydropower Unit；
Using the average value of three-phase voltage virtual value in upper two grid cycles as the phase voltage.
Optionally, further includes:
Receive the protection threshold value setting command of input；
The protection threshold value is modified according to the protection threshold value setting command.
Second aspect, it is described applied in the network system for having water power grid-connected disclosed herein as well is a kind of disconnection device
Disconnection device includes:
Voltage acquisition module, for acquiring the phase voltage of the Hydropower Unit in grid-connected small hydropower station；
MICROCOMPUTER PROCESSING module, for judging whether the voltage variety of the phase voltage is greater than preset value；If the voltage
Variable quantity is greater than the preset value, then judges whether the phase voltage exceeds protection threshold value；If the phase voltage exceeds the guarantor
Threshold value is protected, then exports tripping control signal to relay module；If the voltage variety is not more than the preset value, basis
The phase voltage is updated the protection threshold value；
Relay module, for disconnecting the Hydropower Unit and the power grid after receiving the tripping control signal
The connection switch of system.
Optionally, the voltage acquisition module is specifically used for: acquiring two water of paired running in grid-connected small hydropower station
The phase voltage of motor group；Wherein, the phase voltage is the phase voltage of one of Hydropower Unit, or is two Hydropower Units
Phase voltage average value；
The relay module is specifically used for: after receiving the tripping control signal, disconnecting the paired running
The grid-connected switch of two Hydropower Units and the network system.
Optionally, the voltage acquisition module includes that sequentially connected voltage sampling circuit, signal processing module and A/D turn
Change the mold block；
The voltage sampling circuit obtains the phase voltage for sampling；The signal processing module is used for the phase electricity
Pressure is filtered, and the A/D conversion module is used to carry out A/D conversion to the phase voltage.
Optionally, further includes:
The threshold value adjusting module being connect with the MICROCOMPUTER PROCESSING module, protection threshold value setting command for receiving input,
The protection threshold value is modified according to the protection threshold value setting command；
The normal operation indicating module being connect with the MICROCOMPUTER PROCESSING module；
The alarm indicating module connecting with the MICROCOMPUTER PROCESSING module, the MICROCOMPUTER PROCESSING module are determining the phase voltage
After not within the scope of default reasonable voltage, alarm signal is sent to the alarm indicating module；
The tripping indicating module connecting with the MICROCOMPUTER PROCESSING module, the MICROCOMPUTER PROCESSING module are determining the phase voltage
After the protection threshold value, tripping display signal is sent to the tripping indicating module；
The LCD MODULE being connect with the MICROCOMPUTER PROCESSING module, for showing the acquisition number of the voltage acquisition module
According to.
The third aspect, disclosed herein as well is a kind of network system, T is connected at each small hydropower station of power grid feeder line and is all provided with
It is equipped with any disconnection device as described above.
The solution that Splitting Control provided herein is applied to be installed in the network system for having water power grid-connected is equipped
It sets, comprising: obtain the phase voltage of the Hydropower Unit in grid-connected small hydropower station；Judge the phase voltage voltage variety whether
Greater than preset value；If the voltage variety is greater than the preset value, judge whether the phase voltage exceeds protection threshold value；If
The phase voltage exceeds the protection threshold value, then the relay module output tripping control signal into the disconnection device, with
Toilet states the connection switch that relay module disconnects the Hydropower Unit Yu the network system；If the voltage variety is little
In the preset value, then the protection threshold value is updated according to the phase voltage.
As it can be seen that the application judges whether the phase voltage of Hydropower Unit fluctuates in the reasonable scope based on voltage variety, from
And adaptive dynamic in real time is carried out to protection threshold value based on the phase voltage in reasonable fluctuation range and is adjusted, it is ensured that protects threshold value
The timeliness of reasonability and adjustment is effectively applicable to a variety of operating conditions of network system, avoids the occurrence of the malfunction of disconnection device
And tripping, the effective guarantee operational safety of network system.Disconnection device and network system provided herein equally has
Above-mentioned beneficial effect.
Detailed description of the invention
In order to illustrate more clearly of the technical solution in the prior art and the embodiment of the present application, below will to the prior art and
Attached drawing to be used is needed to make brief introduction in the embodiment of the present application description.Certainly, in relation to the attached drawing of the embodiment of the present application below
A part of the embodiment in only the application of description is not paying creativeness to those skilled in the art
Under the premise of labour, other attached drawings can also be obtained according to the attached drawing of offer, other accompanying drawings obtained also belong to the application
Protection scope.
Fig. 1 is a kind of grid-connected schematic diagram of small power station disclosed in the embodiment of the present application；
Fig. 2 is a kind of flow chart of Splitting Control disclosed in the embodiment of the present application；
Fig. 3 is the flow chart of another Splitting Control disclosed in the embodiment of the present application；
Fig. 4 is a kind of structural block diagram of disconnection device disclosed in the embodiment of the present application；
Fig. 5 is a kind of application scenario diagram of disconnection device disclosed in the embodiment of the present application；
Fig. 6 is the structural block diagram of another disconnection device disclosed in the embodiment of the present application；
Fig. 7 is a kind of front appearance schematic diagram of disconnection device disclosed in the embodiment of the present application；
Fig. 8 is a kind of back appearance schematic diagram of disconnection device disclosed in the embodiment of the present application.
Specific embodiment
The core of the application is to provide a kind of network system and its disconnection device and Splitting Control, effectively to mention
The timeliness and reasonability of high islanding control, automatically adapt to different grid operation modes, avoid the occurrence of the mistake of disconnection device
Dynamic and tripping ensures safe operation of electric network.
In order to which technical solutions in the embodiments of the present application is more clearly and completely described, below in conjunction with this Shen
Please attached drawing in embodiment, technical solutions in the embodiments of the present application is introduced.Obviously, described embodiment is only
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
Currently, in hydroelectric resources mountain area abundant, network system to have water power grid-connected more.In order to water power in small hydropower station
The grid-connected and off-the-line of unit is managed, in the prior art mostly by associated power station administrative staff or professional technician to off-the-line
The islanding control parameter of device is set.The modification timeliness of islanding control parameter is poor as a result, cannot be with operation of power networks side
The variation of formula is completed to reasonably adjust in time, and disconnection device is led to problems such as malfunction or tripping occur.In consideration of it, the application provides
A kind of Splitting Control, can effectively solve the above problems.
Shown in Figure 2, the embodiment of the present application discloses a kind of Splitting Control, applied to the power grid for having water power grid-connected
The disconnection device installed in system, the Splitting Control specifically include that
S11: the phase voltage of the Hydropower Unit in grid-connected small hydropower station is obtained.
Small hydropower station, which refers to, is formed by a kind of water that drop generates electricity using the drop of the streams of dispersion, river or feed ditch
Power station.It can be segmented by installed capacity are as follows: mini (100 kilowatts or less)；Small small hydropower station (101~1000 kilowatts)；It is small
Type power station (1001~12000 kilowatts).
Specifically, there are multiple Hydropower Units in each grid-connected small hydropower station, a solution can be assembled for each Hydropower Unit
Array apparatus, to control the grid-connected and off-the-line of the Hydropower Unit.Certainly, it for two units of paired running, that is, needs to receive system
Two units of one regulation, can be controlled by the same disconnection device.
Using the voltage acquisition module in disconnection device, the phase voltage of Hydropower Unit can be acquired.Generally, Hydropower Unit has
There is three-phase voltage: A phase voltage, B phase voltage and C phase voltage.Therefore, further, as a kind of specific embodiment, step
S11 can specifically include:
Obtain the three-phase voltage of Hydropower Unit；Using the average value of three-phase voltage virtual value in upper two grid cycles as
Phase voltage.
S12: judge whether the voltage variety of phase voltage is greater than preset value；If so, into S13；If it is not, then entering
S15。
Specifically, voltage variety can be calculated according to U (t)-U (t-nT), wherein U (t) is the phase electricity currently obtained
Pressure, U (t-nT) are the phase voltage that n Zhou Boqian is obtained, and T is the time (20ms) of a cycle.Also, the value range of n pushes away
It recommends but is not limited to 3~5.
Preset value is indicated with Δ U, if U (t)-U (t-nT) > Δ U, is illustrated that power network fluctuation situation is serious, is needed further to sentence
It is disconnected whether to carry out islanding control；If U (t)-U (t-nT)≤Δ U illustrates that power network fluctuation situation is not serious, without carrying out off-the-line
Control.
S13: judge whether phase voltage exceeds protection threshold value；If so, into S14.
As previously mentioned, protection threshold value is an important islanding control parameter in disconnection device: when isolated network fortune occurs for system
When row generates overvoltage, when phase voltage is greater than protection threshold value, need to trigger disconnection device movement, so as to by corresponding Hydropower Unit
The off-the-line from power grid, the i.e. operation of completion off-the-line.
S14: the relay module output tripping control signal into disconnection device, so that relay module disconnects hydroelectric machine
The connection switch of group and network system.
Protection threshold value is indicated with Uset (t), it, can be by exporting tripping control to relay module if then U (t) > Uset (t)
Signal processed carries out off-the-line operation to trigger disconnection device.Wherein, the relay module in disconnection device is for controlling the hydroelectric machine
The on-off of connection switch between group and network system, after receiving tripping control signal, relay module controls the company
It connects switch to disconnect, which is split from network system.
S15: protection threshold value is updated according to phase voltage.
As previously mentioned, illustrating that power network fluctuation situation is not serious, without carrying out off-the-line control if U (t)-U (t-nT)≤Δ U
System.However, it is desirable to, it is noted that in the present embodiment, in order to guarantee to protect the dynamic auto adjustable to mention of threshold value in disconnection device
High real-time reasonability carries out protection threshold value according to the phase voltage currently obtained in power network fluctuation situation not serious situation
Update adjustment.
Further, as a kind of specific embodiment, step S15 be may particularly include: according to default adjustment formula to guarantor
Shield threshold value is updated, and presets adjustment formula are as follows:
Uset (t)=kU (t)；
Wherein, U (t) is phase voltage；K is preset ratio coefficient；Uset (t) is protection threshold value.Also, the value range of k
Recommend but is not limited to 1.15~1.35.Certainly, other calculations can also be used to update protection threshold value in those skilled in the art,
Such as constant term can be added on the basis of above formula, or in addition using power operation etc., the application does not do into one this
Step limits.
It is easily understood that the operating condition for the network system for having water power grid-connected is complex.Firstly, shown in Fig. 1
In sending, along each load bus of feeder line, voltage is gradually raised, that is, under normal circumstances, front end node on route
Voltage can be lower than the voltage of backend nodes, UA<UB<UC；Secondly, when grid operation mode variation, power network line turn power supply, it is former
This route head end can become end；In addition, the voltage of network system interior joint is in wet season and dry season with seasonal variations
Also significant change can occur.
In order to adapt to these grid operating conditions complicated and changeable, there is no using fixed protection threshold value for the embodiment of the present application
Control program, but in the case where phase voltage normal in size, according to phase voltage size to protection threshold value carry out in real time from
It adapts to dynamic to adjust, so as to ensure the reasonability of protection threshold value under various different operating conditions, it is ensured that disconnection device will not
There is the case where malfunction or tripping.
For example, then, according to the protection threshold value that fixation is unified, being shown since back end of line voltage is higher than route front voltage
It can so enable the disconnection device of route front end be easy to appear tripping because of sensitivity deficiency, and enable the disconnection device of back end of line because of mistake
In sensitive and be easy to appear malfunction.If each disconnection device dynamically adjusts protection threshold value according to the phase voltage respectively acquired,
Then for the disconnection device in Fig. 1 at A, B, C tri-, not only UA<UB<UC, and have UsetA(t)<UsetB(t)<UsetC(t), may be used
Effectively avoid above situation.Similarly, it can also effectively improve the seasonal adaptation of disconnection device and grid operation mode is fitted
Ying Xing.
Splitting Control provided by the embodiment of the present application is applied to be installed in the network system for having the water power grid-connected
Disconnection device, comprising: obtain the phase voltage of the Hydropower Unit in grid-connected small hydropower station；Judge the voltage change of the phase voltage
Whether amount is greater than preset value；If the voltage variety is greater than the preset value, judge whether the phase voltage exceeds protection
Threshold value；Relay module output tripping control if the phase voltage exceeds the protection threshold value, into the disconnection device
Signal, so that the relay module disconnects the connection switch of the Hydropower Unit Yu the network system；If the voltage becomes
Change amount is not more than the preset value, then is updated according to the phase voltage to the protection threshold value.
As it can be seen that the application judges whether the phase voltage of Hydropower Unit fluctuates in the reasonable scope based on voltage variety, from
And adaptive dynamic in real time is carried out to protection threshold value based on the phase voltage in reasonable fluctuation range and is adjusted, it is ensured that protects threshold value
The timeliness of reasonability and adjustment is effectively applicable to a variety of operating conditions of network system, avoids the occurrence of the malfunction of disconnection device
And tripping, the effective guarantee operational safety of network system.
Shown in Figure 3, the embodiment of the present application discloses another Splitting Control, applied to the electricity for having water power grid-connected
The disconnection device installed in net system, specifically includes that
S21: the phase voltage of the Hydropower Unit in grid-connected small hydropower station is obtained.
S22: phase voltage is judged whether within the scope of default reasonable voltage, if so, into S23；If it is not, then entering S27.
It should be pointed out that being provided with one for judging whether system is tight for the phase voltage of Hydropower Unit in the present embodiment
The abnormal default reasonable voltage range of weight.For example, the default reasonable voltage range can be specially 150V~400V.
If phase voltage can carry out subsequent step within the scope of default reasonable voltage, to further determine whether to need
It updates protection threshold value or directly carries out off-the-line operation；If phase voltage has had exceeded default reasonable voltage range, illustrate
There is severely subnormal in circuit system where disconnection device, then should carry out fault alarm at this time.
S23: judge whether the voltage variety of phase voltage is greater than preset value；If so, into S24；If it is not, then entering
S26。
S24: judge whether phase voltage exceeds protection threshold value；If so, into S25.
S25: the relay module output tripping control signal into disconnection device, so that relay module disconnects hydroelectric machine
The connection switch of group and network system.
S26: protection threshold value is updated according to phase voltage.
S27: the alarm indicating module outputting alarm signal into disconnection device carries out abnormal announcement to alert indicating module
It is alert.
Wherein, which includes but is not limited to alarm indicator.
On the basis of the above, Splitting Control provided by the embodiment of the present application, further includes:
Receive the protection threshold value setting command of input；
According to protection threshold value setting command modification protection threshold value.
Specifically, Splitting Control provided by the present embodiment, in addition to sampling adaptive dynamic adjusting method according to phase
It, can also be according to the protection threshold value setting command that power management personnel input to protection other than voltage is updated protection threshold value
Threshold value is adjusted.
Shown in Figure 4, the embodiment of the present application discloses a kind of disconnection device, applied to the network system for having water power grid-connected
In, it specifically includes that
Voltage acquisition module, for acquiring the phase voltage of the Hydropower Unit in grid-connected small hydropower station；
MICROCOMPUTER PROCESSING module, for judging whether the voltage variety of phase voltage is greater than preset value；If voltage variety is big
In preset value, then judge whether phase voltage exceeds protection threshold value；If phase voltage is exported beyond protection threshold value to relay module
Tripping control signal；If voltage variety is not more than preset value, protection threshold value is updated according to phase voltage；
Relay module, for after receiving tripping control signal, the connection for disconnecting Hydropower Unit and network system to be opened
It closes.
About the particular content of above-mentioned disconnection device, being discussed in detail previously with regard to Splitting Control can refer to, here
Just repeat no more.
As it can be seen that the application judges whether the phase voltage of Hydropower Unit fluctuates in the reasonable scope based on voltage variety, from
And adaptive dynamic in real time is carried out to protection threshold value based on the phase voltage in reasonable fluctuation range and is adjusted, it is ensured that protects threshold value
The timeliness of reasonability and adjustment is effectively applicable to a variety of operating conditions of network system, avoids the occurrence of the malfunction of disconnection device
And tripping, the effective guarantee operational safety of network system.
On the basis of the above, disconnection device disclosed in the embodiment of the present application, as a kind of specific embodiment,
Voltage acquisition module is specifically used for:
Obtain the three-phase voltage of Hydropower Unit；Using the average value of three-phase voltage virtual value in upper two grid cycles as
Phase voltage.
On the basis of the above, as before, two Hydropower Units for paired running, can be set a solution and equip
It sets to be managed jointly.
In a specific embodiment, voltage acquisition module is specifically used for: acquiring and transports side by side in grid-connected small hydropower station
The phase voltage of two capable Hydropower Units；Wherein, which is the phase voltage of one of Hydropower Unit, or is two water
The phase voltage average value of motor group；Relay module is specifically used for: after receiving tripping control signal, disconnecting paired running
The grid-connected switch of two Hydropower Units and network system.
Also need supplementary explanation, when those skilled in the art selected using the phase voltage of one of Hydropower Unit come
When controlling the grid-connected and off-the-line of the two Hydropower Units, the phase voltage of another Hydropower Unit can be used as spare.
Shown in Figure 5, Fig. 5 is a kind of application scenario diagram of disconnection device disclosed in the embodiment of the present application.Wherein No. 1 water
Motor group and No. 2 Hydropower Units are the Hydropower Unit of two paired runnings, and disconnection device controls relay using relay module
The opening and closing of contact T1, T2, T3, T4 control the grid-connected switch QF1 of No. 1 Hydropower Unit and No. 2 Hydropower Units using relay tip
The on-off of grid-connected switch QF2, thus the grid-connected and off-the-line of two Hydropower Units of control.
Further, on the basis of the above, disconnection device disclosed in the embodiment of the present application, as a kind of specific
Embodiment, MICROCOMPUTER PROCESSING module are specifically used for:
Protection threshold value is updated according to default adjustment formula, presets adjustment formula are as follows:
Uset (t)=kU (t)；
Wherein, U (t) is phase voltage；K is preset ratio coefficient；Uset (t) is protection threshold value.
Shown in Figure 6, Fig. 6 is the structural block diagram of another disconnection device disclosed in the embodiment of the present application.
On the basis of the above, disconnection device disclosed in the embodiment of the present application, as a kind of specific embodiment,
Voltage acquisition module includes sequentially connected voltage sampling circuit, signal processing module and A/D conversion module；
Voltage sampling circuit obtains phase voltage for sampling；Signal processing module is used to be filtered phase voltage,
A/D conversion module is used to carry out A/D conversion to phase voltage.
Further, on the basis of the above, disconnection device disclosed in the embodiment of the present application, as a kind of specific
Embodiment, further includes:
The threshold value adjusting module being connect with MICROCOMPUTER PROCESSING module, protection threshold value setting command for receiving input, according to
Protect threshold value setting command modification protection threshold value；
The normal operation indicating module being connect with MICROCOMPUTER PROCESSING module；
The alarm indicating module connecting with MICROCOMPUTER PROCESSING module does not exist for receiving MICROCOMPUTER PROCESSING module in judgement phase voltage
The alarm signal sent after within the scope of default reasonable voltage；
The tripping indicating module connecting with MICROCOMPUTER PROCESSING module, MICROCOMPUTER PROCESSING module are determining phase voltage beyond protection threshold value
Later, tripping display signal is sent to tripping indicating module；
The LCD MODULE being connect with MICROCOMPUTER PROCESSING module, for showing the acquisition data of voltage acquisition module.
Wherein, indicating module, alarm indicating module, tripping indicating module are operated normally and is specifically as follows indicator light.Just
Often operation indicating module is used to indicate circuit normal operation, i.e., phase voltage is within the scope of default reasonable voltage；Alert indicating module
It is used to indicate circuit and severely subnormal occurs, i.e., phase voltage is not within the scope of default reasonable voltage；Tripping indicating module is used to indicate
Disconnection device triggers off-the-line movement, i.e., relay module is disconnected the connection switch between Hydropower Unit and network system.This
Outside, LCD MODULE can specifically show the voltage value and frequency values of the phase voltage that acquisition obtains.
In addition, further, disconnection device provided by the present embodiment can also include:
The memory module being connect with MICROCOMPUTER PROCESSING module, for store disconnection device off-the-line action event record and/or
Abnormality alarming logout；
The functional module being connect with MICROCOMPUTER PROCESSING module, function selection instruction for receiving input；
The reseting module being connect with MICROCOMPUTER PROCESSING module, reset instruction for receiving input, so as to MICROCOMPUTER PROCESSING module
Relay module and tripping indicating module are resetted；
For signal processing module, the power supply processing module of A/D conversion module and MICROCOMPUTER PROCESSING module for power supply.
Wherein, power supply processing module can use the small hydropower station outlet single-phase voltage of access disconnection device specifically to provide
Operating voltage.Functional module can specifically be provided with the functions selection keys such as " upward ", " downward ", " confirmation ".Referring to figs. 7 and 8,
Fig. 7 is a kind of front appearance schematic diagram of disconnection device provided by the embodiments of the present application, and Fig. 8 is provided by the embodiments of the present application one
The back appearance schematic diagram of kind disconnection device.Certainly, those skilled in the art can select simultaneously according to practical situations and voluntarily
Setting realizes that the application does not further limit this.
Further, disclosed herein as well is a kind of network system, T is connected at each small hydropower station of power grid feeder line and is all provided with
It is equipped with any disconnection device as described above.
About the particular content of above-mentioned network system, being discussed in detail previously with regard to Splitting Control can refer to, here
Just repeat no more.
Each embodiment is described in a progressive manner in the application, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.For equipment disclosed in embodiment
Speech, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is referring to method part illustration
.
It should be noted that in present specification, the relational terms of such as " first " and " second " etc are used merely to
One entity or operation and another entity or operate is distinguished, without necessarily requiring or implying these entities or
There are any actual relationship or orders between person's operation.In addition, the terms "include", "comprise" or its any other
Variant is intended to non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only
It including those elements, but also including other elements that are not explicitly listed, or further include for this process, method, object
Product or the intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...",
It is not precluded in the process, method, article or apparatus that includes the element that there is also other identical elements.
Technical solution provided herein is described in detail above.Specific case used herein is to this Shen
Principle and embodiment please is expounded, the present processes that the above embodiments are only used to help understand and its
Core concept.It should be pointed out that for those skilled in the art, in the premise for not departing from the application principle
Under, can also to the application, some improvement and modification can also be carried out, these improvement and modification are also fallen into the protection scope of the application.
Claims (10)
1. a kind of Splitting Control, which is characterized in that equipped applied to the solution installed in the network system for having water power grid-connected
It sets, the Splitting Control includes:
Obtain the phase voltage of the Hydropower Unit in grid-connected small hydropower station；
Judge whether the voltage variety of the phase voltage is greater than preset value；
If the voltage variety is greater than the preset value, judge whether the phase voltage exceeds protection threshold value；If the phase
Voltage exceeds the protection threshold value, then the relay module output tripping control signal into the disconnection device, so as to described
Relay module disconnects the connection switch of the Hydropower Unit Yu the network system；
If the voltage variety is not more than the preset value, the protection threshold value is updated according to the phase voltage.
2. Splitting Control according to claim 1, which is characterized in that the voltage change of the judgement phase voltage
Whether amount is greater than preset value, comprising:
Judge the phase voltage whether within the scope of default reasonable voltage；
If so, the step of whether the starting voltage variety for judging the phase voltage is greater than preset value；
If it is not, the then alarm indicating module outputting alarm signal into the disconnection device, so as to the alarm indicating module into
Row abnormality alarming.
3. Splitting Control according to claim 1, which is characterized in that it is described according to the phase voltage to the protection
Threshold value is updated, comprising:
The protection threshold value is updated according to default adjustment formula, the default adjustment formula are as follows:
Uset (t)=kU (t)；
Wherein, U (t) is the phase voltage；K is preset ratio coefficient；Uset (t) is the protection threshold value.
4. Splitting Control according to claim 1, which is characterized in that the water obtained in grid-connected small hydropower station
The phase voltage of motor group, comprising:
Obtain the three-phase voltage of the Hydropower Unit；
Using the average value of three-phase voltage virtual value in upper two grid cycles as the phase voltage.
5. Splitting Control according to any one of claims 1 to 4, which is characterized in that further include:
Receive the protection threshold value setting command of input；
The protection threshold value is modified according to the protection threshold value setting command.
6. a kind of disconnection device, which is characterized in that applied in the network system for having water power grid-connected, the disconnection device includes:
Voltage acquisition module, for acquiring the phase voltage of the Hydropower Unit in grid-connected small hydropower station；
MICROCOMPUTER PROCESSING module, for judging whether the voltage variety of the phase voltage is greater than preset value；If the voltage change
Amount is greater than the preset value, then judges whether the phase voltage exceeds protection threshold value；If the phase voltage exceeds the protection threshold
Value then exports tripping control signal to relay module；If the voltage variety is not more than the preset value, according to
Phase voltage is updated the protection threshold value；
Relay module, for disconnecting the Hydropower Unit and the network system after receiving the tripping control signal
Connection switch.
7. disconnection device according to claim 6, which is characterized in that
The voltage acquisition module is specifically used for: acquiring the phase electricity of two Hydropower Units of paired running in grid-connected small hydropower station
Pressure, wherein the phase voltage is the phase voltage of one of Hydropower Unit, or average for the phase voltage of two Hydropower Units
Value；
The relay module is specifically used for: after receiving the tripping control signal, disconnecting two of the paired running
The grid-connected switch of Hydropower Unit and the network system.
8. disconnection device according to claim 6, which is characterized in that the voltage acquisition module includes sequentially connected electricity
Press sample circuit, signal processing module and A/D conversion module；
The voltage sampling circuit obtains the phase voltage for sampling；The signal processing module be used for the phase voltage into
Row filtering processing, the A/D conversion module are used to carry out A/D conversion to the phase voltage.
9. disconnection device according to claim 6, which is characterized in that further include:
The threshold value adjusting module being connect with the MICROCOMPUTER PROCESSING module, protection threshold value setting command for receiving input, according to
The protection threshold value is modified in the protection threshold value setting command；
The normal operation indicating module being connect with the MICROCOMPUTER PROCESSING module；
The alarm indicating module connecting with the MICROCOMPUTER PROCESSING module, the MICROCOMPUTER PROCESSING module do not exist in the judgement phase voltage
After within the scope of default reasonable voltage, alarm signal is sent to the alarm indicating module；
The tripping indicating module connecting with the MICROCOMPUTER PROCESSING module, the MICROCOMPUTER PROCESSING module exceed in the judgement phase voltage
After the protection threshold value, tripping display signal is sent to the tripping indicating module；
The LCD MODULE being connect with the MICROCOMPUTER PROCESSING module, for showing the acquisition data of the voltage acquisition module.
10. a kind of network system, which is characterized in that T, which is connected to, to be provided with right such as at each small hydropower station of power grid feeder line and want
Seek 6 to 9 described in any item disconnection devices.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910764900.6A CN110429608A (en) | 2019-08-19 | 2019-08-19 | A kind of network system and its disconnection device and Splitting Control |
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| CN201910764900.6A CN110429608A (en) | 2019-08-19 | 2019-08-19 | A kind of network system and its disconnection device and Splitting Control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308058A (en) * | 2020-03-14 | 2020-06-19 | 深圳联开生物医疗科技有限公司 | Counting hole voltage alarm threshold self-adaption method and device and blood cell analyzer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529737A (en) * | 2015-12-29 | 2016-04-27 | 深圳市锦祥自动化设备有限公司 | Power network splitting device and method |
| CN106410796A (en) * | 2016-11-22 | 2017-02-15 | 新奥泛能网络科技股份有限公司 | Method for separating generator set from grid and measuring and controlling device |
| CN108429243A (en) * | 2018-05-29 | 2018-08-21 | 广东电网有限责任公司 | Disconnection device and hydroelectric system |
| CN108631319A (en) * | 2018-05-29 | 2018-10-09 | 广东电网有限责任公司 | Off-the-line method, apparatus and equipment |
| CN110021964A (en) * | 2019-01-28 | 2019-07-16 | 深圳供电局有限公司 | A kind of part isolated network stablizes the net source lotus distributed and coordinated control method of switching |
-
2019
- 2019-08-19 CN CN201910764900.6A patent/CN110429608A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529737A (en) * | 2015-12-29 | 2016-04-27 | 深圳市锦祥自动化设备有限公司 | Power network splitting device and method |
| CN106410796A (en) * | 2016-11-22 | 2017-02-15 | 新奥泛能网络科技股份有限公司 | Method for separating generator set from grid and measuring and controlling device |
| CN108429243A (en) * | 2018-05-29 | 2018-08-21 | 广东电网有限责任公司 | Disconnection device and hydroelectric system |
| CN108631319A (en) * | 2018-05-29 | 2018-10-09 | 广东电网有限责任公司 | Off-the-line method, apparatus and equipment |
| CN110021964A (en) * | 2019-01-28 | 2019-07-16 | 深圳供电局有限公司 | A kind of part isolated network stablizes the net source lotus distributed and coordinated control method of switching |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111308058A (en) * | 2020-03-14 | 2020-06-19 | 深圳联开生物医疗科技有限公司 | Counting hole voltage alarm threshold self-adaption method and device and blood cell analyzer |
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Application publication date: 20191108 |