CN108429243A - Disconnection device and hydroelectric system - Google Patents
Disconnection device and hydroelectric system Download PDFInfo
- Publication number
- CN108429243A CN108429243A CN201810537211.7A CN201810537211A CN108429243A CN 108429243 A CN108429243 A CN 108429243A CN 201810537211 A CN201810537211 A CN 201810537211A CN 108429243 A CN108429243 A CN 108429243A
- Authority
- CN
- China
- Prior art keywords
- microcontroller
- voltage value
- disconnection
- power station
- hydropower unit
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention provides a kind of disconnection device and hydroelectric systems, are related to the technical field of power station overcurrent protection, including：Voltage collector, microcontroller, prompting device；Microcontroller is connected with voltage collector, prompting device respectively；Voltage collector acquires the real-time voltage value of power station outlet for being connected with the outlet in power station；Microcontroller with Hydropower Unit for being connected, the real-time voltage value based on acquisition, and dynamic adjusts overvoltage protection definite value, and when real-time voltage value is more than current overvoltage protection definite value, controls the disconnection of the Hydropower Unit；The case where prompting device is used for after Hydropower Unit tripping, and prompt user pays attention to the Hydropower Unit.Erroneous judgement and the tripping situation of off-the-line equipment are avoided, meanwhile, it is capable to mitigate workload for relay protection maintenance, commissioning staff, the precision maneuver rate of disconnection device is improved, to ensure power network safety operation and reliable power supply.
Description
Technical field
The present invention relates to power station overcurrent protection technical fields, more particularly, to a kind of disconnection device and hydroelectric system.
Background technology
In the power grid of mountain area, hydroelectric resources is abundant, and a large amount of substations are equipped with Hydropower Entering In Power Network, and mountain area power grid is mainly small water
Power station power supply, small hydropower station are mainly surfed the Internet by 10kV circuits, and major part T is connected to 10kV feeder lines, has formed distant place water power
Collect step by step, concentrate boosting, the high-power development model sent outside at a distance.Under this pattern, the generator of sending concatenates
Enter substation, is sent in the transimission power reduction or power on 10kV feeder lines and small power station exports idle support, can make edge
Voltage is elevated at each load bus of feeder line.
A disconnection device can be configured in power station, disconnection device is for carrying out overcurrent protection, that is, when in power station
Voltage value be higher than overvoltage protection definite value when, overvoltage protection can be carried out.However, due to the hydroelectric station operation electricity of long transmission line back segment
Pressure is higher, if disconnection device is judged according to fixed overvoltage protection definite value, the voltage in electric system normal operation
When fluctuation, it is easy to cause overvoltage protection to malfunction, influence the normal power generation in power station.
Therefore, disconnection device is exited in most of power station, however, exited disconnection device, when can lead to isolated power grid not
It can timely off-the-line small power supply.Furthermore it is also possible to carry out overcurrent protection by improving the overvoltage protection definite value of disconnection device, subtract
Caused malfunction when few voltage fluctuation, however, during isolated power grid generation overvoltage occurs for electric system, overvoltage protection dress
Set may sensitivity is insufficient and tripping.
Invention content
In view of this, the purpose of the present invention is to provide disconnection device and hydroelectric system, the erroneous judgement of off-the-line equipment is avoided
With tripping situation the accurate dynamic of disconnection device is improved meanwhile, it is capable to mitigate workload for relay protection maintenance, commissioning staff
Make rate, to ensure power network safety operation and reliable power supply.
In a first aspect, an embodiment of the present invention provides a kind of disconnection devices, including：Voltage collector, microcontroller, prompt
Device；The microcontroller is connected with the voltage collector, the prompting device respectively；
The voltage collector acquires the real-time voltage value of the power station outlet for being connected with the outlet in power station；
The microcontroller with Hydropower Unit for being connected, the real-time voltage value based on acquisition, and it is fixed that dynamic adjusts overvoltage protection
Value, and when real-time voltage value is more than current overvoltage protection definite value, control the disconnection of the Hydropower Unit；
The case where prompting device is used for after Hydropower Unit disconnection, and prompt user pays attention to the Hydropower Unit.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiments of first aspect, wherein also
Including：Display, the display are connected with the microcontroller, and the display is used to show the voltage collector acquisition
Voltage value.
With reference to first aspect, an embodiment of the present invention provides second of possible embodiments of first aspect, wherein also
Including：Run indicator and malfunction indicator lamp.
With reference to first aspect, an embodiment of the present invention provides the third possible embodiments of first aspect, wherein institute
Microcontroller is stated to be additionally operable to detect the operating condition of the disconnection device, when it is normal operation to detect the disconnection device, hair
The number of delivering letters is to the run indicator, to prompt disconnection device normal operation described in user, when detecting the disconnection device therefore
When barrier, the malfunction indicator lamp is sent a signal to, to prompt disconnection device described in user to break down.
With reference to first aspect, an embodiment of the present invention provides the 4th kind of possible embodiments of first aspect, wherein also
Including：A/D converter, the A/D converter are arranged between the voltage collector and the microcontroller, the A/D conversions
Device is used to the collected simulated voltage value of voltage collector being converted to digitized voltage value.
With reference to first aspect, an embodiment of the present invention provides the 5th kind of possible embodiments of first aspect, wherein also
Including：Memory, the memory are connected with the microcontroller, and the memory is used to store the action feelings of the Hydropower Unit
Condition.
With reference to first aspect, an embodiment of the present invention provides the 6th kind of possible embodiments of first aspect, wherein also
Including：Reset button, the reset button are connected with the microcontroller, and the reset button is used to receive user's reset instruction,
So that the microcontroller controls the disconnection device and resets.
With reference to first aspect, an embodiment of the present invention provides the 7th kind of possible embodiments of first aspect, wherein also
Including：Power processor, the power processor are connected with the microcontroller, and the power processor is used for and the power station
Outlet be connected, the voltage value in the outlet in the power station is changed into operating voltage, electric energy is provided for the microcontroller.
With reference to first aspect, an embodiment of the present invention provides the 8th kind of possible embodiments of first aspect, wherein also
Including：Human-computer interaction interface, the human-computer interaction interface are described can make for receiving overvoltage protection definite value input by user
Microcontroller controls the ON/OFF of the Hydropower Unit according to the overvoltage protection definite value and the real-time voltage value.
Second aspect, the embodiment of the present invention also provide a kind of hydroelectric system, are applied in power station, the system comprises：
Multiple Hydropower Units and according to above-described embodiment any one of them disconnection device, the disconnection device is for controlling multiple water power
The ON/OFF of unit, wherein multiple Hydropower Unit paired runnings.
The embodiment of the present invention brings following advantageous effect：Voltage collector, microcontroller, prompt are added on disconnection device
Device, microcontroller are connected with voltage collector, prompting device respectively, are connected with the outlet in power station by voltage collector, acquire water
The real-time voltage value of power station outlet, microcontroller are connected with Hydropower Unit, the real-time voltage value based on acquisition, and dynamic adjusts overvoltage and protects
Definite value is protected, and when real-time voltage value is more than current overvoltage protection definite value, controls the disconnection of Hydropower Unit, prompting device is in hydroelectric machine
The case where organizing after disconnecting, user prompted to pay attention to Hydropower Unit.The present invention can dynamically be adjusted based on the real-time voltage value of acquisition
The case where pressure protects definite value, and after Hydropower Unit disconnection, and prompt user pays attention to Hydropower Unit, avoids the erroneous judgement of off-the-line equipment
With tripping situation the accurate dynamic of disconnection device is improved meanwhile, it is capable to mitigate workload for relay protection maintenance, commissioning staff
Make rate, to ensure power network safety operation and reliable power supply.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and is obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is the application scenarios schematic diagram of disconnection device provided in an embodiment of the present invention；
Fig. 2 is the structure chart of disconnection device provided by one embodiment of the present invention；
Fig. 3 is the flow chart that microcontroller works in disconnection device provided in an embodiment of the present invention；
Fig. 4 is small power station's grid-connected system simplified model schematic diagram；
Fig. 5 is the structure chart for the disconnection device that another embodiment of the present invention provides；
Fig. 6 is the front elevation of disconnection device provided in an embodiment of the present invention；
Fig. 7 is the back view of disconnection device provided in an embodiment of the present invention；
Fig. 8 is the structure chart of hydroelectric system provided in an embodiment of the present invention；
Fig. 9 is application scenarios schematic diagram of the hydroelectric system provided in an embodiment of the present invention in power station.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
Flow chart and block diagram in attached drawing show the system, method and computer journey of multiple embodiments according to the present invention
The architecture, function and operation in the cards of sequence product.In this regard, each box in flowchart or block diagram can generation
A part for a part for one module, section or code of table, the module, section or code includes one or more uses
The executable instruction of the logic function as defined in realization.It should also be noted that in some implementations as replacements, being marked in box
The function of note can also occur in a different order than that indicated in the drawings.For example, two continuous boxes can essentially base
Originally it is performed in parallel, they can also be executed in the opposite order sometimes, this is depended on the functions involved.It is also noted that
It is the combination of each box in block diagram and or flow chart and the box in block diagram and or flow chart, can uses and execute rule
The dedicated hardware based system of fixed function or action is realized, or can use the group of specialized hardware and computer instruction
It closes to realize.
Embodiment one：
First embodiment of the invention provides a kind of disconnection device, in conjunction with shown in Fig. 1, shows the disconnection device of the present invention
Application scenarios, disconnection device is mainly disposed in power station, sees from right to left, and power station generates electricity, after transformer,
Voltage is uploaded in power distribution network, meanwhile, in the leading-out terminal of small hydropower station, connect off-the-line equipment.
In conjunction with shown in Fig. 2, an embodiment of the present invention provides the structure charts of disconnection device, including：Voltage collector 110, list
Piece machine 120, prompting device 130；Microcontroller 120 is connected with voltage collector 110, prompting device 130 respectively；
Voltage collector 110 acquires the real-time voltage value of power station outlet for being connected with the outlet in power station；
Microcontroller 120 with Hydropower Unit for being connected, the real-time voltage value based on acquisition, and it is fixed that dynamic adjusts overvoltage protection
Value, and when real-time voltage value is more than current overvoltage protection definite value, control the disconnection of Hydropower Unit；
The case where prompting device 130 is used for after Hydropower Unit disconnection, and prompt user pays attention to Hydropower Unit.
Wherein, the workflow of microcontroller 120, in conjunction with shown in Fig. 3, S1：Obtain the real-time voltage value of power station output.
Specifically, in conjunction with shown in Fig. 1, voltage transformer is arranged in power station outlet, is acquired by voltage transformer
The real-time voltage value of power station output.
S2：Judge real-time voltage value whether in predetermined voltage range；If so, S3 is thened follow the steps, if it is not, then holding
Row step S4.
S3：Judge whether real-time voltage value meets preset relation with the standard voltage value in preset time period；If it is,
Execute S5.If not, thening follow the steps S6.
S4：Control alarm, to warn the staff in power station to notice that power station operating voltage is excessively high.
S5：It determines power station normal operation, and is based on real-time voltage value, adjust the overvoltage protection definite value of off-the-line equipment.
S6：It determines power station abnormal running, and judges whether real-time voltage value is more than current overvoltage protection definite value, if
It is to then follow the steps S7, if not, thening follow the steps S8.
S7：The Hydropower Unit controlled in power station disconnects.
S8：Control off-the-line equipment is resetted within the object time.
Specifically, in distribution rear end, voltage can also will produce fluctuation with the change of the method for operation, so, judge reality
When voltage value whether in predetermined voltage range, if, illustrate real-time voltage value in rational scope range of the fluctuation of voltage, if
Do not exist, then illustrate that real-time voltage value exceeds in rational scope range of the fluctuation of voltage, needs to carry out alert process, warn power station
Staff notices that power station operating voltage is excessively high.Wherein, predetermined voltage range can be 150V~400V.
When judging that real-time voltage value is in reasonable voltage fluctuation range, continue to judge, judges real-time voltage value
Whether meet preset relation with the standard voltage value in preset time period, wherein preset relation is real-time voltage value and standard electric
It is poor that difference between pressure value is less than predeterminated voltage.That is, it is judged that U (t)-U (t-nT) whether be less than △ U, when less than when, determine water power
Stand normal operation, when more than when, illustrate power station abnormal running, that is, the output voltage offset in power station is exceeded, to power station
Carry out overvoltage protection.Wherein, U (t) is real-time voltage value, and U (t-nT) is standard voltage value, wherein n values are 3~5, T mono-
The time of a cycle, such as：T=20ms.
Meanwhile judging U (t)-U (t-nT)<△ U, are based on real-time voltage value, and the overvoltage protection of adjustment off-the-line equipment is fixed
Value.That is, when power station normal operation, the overvoltage protection definite value of off-the-line equipment can be adjusted according to real-time voltage value, in this way with
The case where voltage, adjusts overvoltage protection definite value, can realize the variation based on power system operating mode, the overvoltage of off-the-line equipment
The case where protection definite value also with variation, can effectively avoid the erroneous judgement and tripping of off-the-line equipment is safeguarded for relay protection, is adjusted
Examination personnel mitigate workload, the precision maneuver rate of small power station's disconnection device are improved, to ensure power network safety operation
And reliable power supply.
Wherein, the overvoltage protection definite value of the adjustment off-the-line equipment in step S5, including：Adjustment ratio is determined, based on real-time
Voltage value and adjustment ratio, adjust the overvoltage protection definite value of disconnection device.
Specifically, adjustment ratio can be determined by two ways, a kind of mode is：Power station is obtained to power in power grid
Location information in circuit is based on location information, determines adjustment ratio, and adjustment ratio is indicated with k, k values for 1.2~1.3 it
Between.
As an example, in conjunction with shown in Fig. 4, a kind of small power station's grid-connected system simplified model schematic diagram, small water are shown
Power station, which can supply, meets node power budget demand, while conveying electric energy to system end.Then, sending is Far Left,
Tri- load bus of A, B, C are from left to right sequentially ingressed into, small hydropower station is connected at three load bus, so, A load bus
Nearest apart from sending, followed by B load bus is finally C load bus, and distance is farthest, so, A loads can be set
At node, the adjustment ratio k of the off-the-line equipment in small hydropower station is minimum, such as at ka=1.2, B load bus, in small hydropower station
Off-the-line equipment adjustment ratio k, such as at kb=1.25, C load bus, the adjustment ratio of the off-the-line equipment in small hydropower station
K is maximum, such as kc=1.3.Certainly, in all examples being illustrated and described herein, any occurrence should be interpreted only
It is exemplary, not as limitation, therefore, other examples of exemplary embodiment can have different values.
Determine that adjustment ratio, another way are：Obtain power station run time, based on run time, determine adjustment
Ratio.
For example, during doing wet season and dry season, since during the wet season, the power of hydropower station is bigger, electricity
Pressure ratio is larger, thus overvoltage protection definite value should also compare it is larger, so, adjustment ratio k also should be larger.And
During dry season, the voltage of hydropower station is smaller, so overvoltage protection definite value also should be relatively small, so, it compares
For the adjustment ratio k of wet season, the adjustment ratio k in dry season is smaller, such as：K is rich=and 1.3, k is withered=and 1.2.
Specifically, overvoltage protection definite value is adjusted using following formula,
USET(t)=kU (t),
Wherein, k is adjustment ratio, and the value of k is set as (1.2~1.3), the overvoltage protection definite value U after adjustmentSET(t), U
(t) it is real-time voltage value.
For step S6~S8：Specifically, when real-time voltage value and the standard voltage value in preset time period are unsatisfactory for
When preset relation, that is, open troubleshooting pattern, wherein troubleshooting pattern is to judge whether current state carries out overvoltage protection
Process.In troubleshooting pattern, first determine whether real-time voltage value is more than current overvoltage protection definite value.If it is,
Illustrate that real-time voltage value at this time can cause high pressure accident to the motor of circuit, power station in power grid, so, S7 is executed,
The Hydropower Unit controlled in power station disconnects, wherein Hydropower Unit includes breaker and hydroelectric machine, breaker respectively with water power
Machine, disconnection device are connected with power network line, and disconnection device controls the Hydropower Unit in power station and disconnects, that is, disconnection device controls
Circuit breaker trip, control hydroelectric machine are disconnected with power network line, have carried out timely protection to the circuit in power grid, equipment in this way.Such as
Fruit is no, then executes S8, and control off-the-line equipment is resetted within the object time, that is, although voltage at this time has exceeded reasonably
Fluctuation range, but the danger of high pressure accident is not still had, it is therefore possible to control off-the-line equipment is answered within the object time
Position obtains new voltage value re-starting, continues the deterministic process of next voltage value.
In conclusion disconnection device provided in an embodiment of the present invention, addition voltage collector, microcontroller, prompting device, monolithic
Machine is connected with voltage collector, prompting device respectively, is connected with the outlet in power station by voltage collector, acquires power station outlet
Real-time voltage value, microcontroller is connected with Hydropower Unit, the real-time voltage value based on acquisition, and dynamic adjusts overvoltage protection definite value,
And when real-time voltage value is more than current overvoltage protection definite value, the disconnection of Hydropower Unit is controlled, prompting device is disconnected in Hydropower Unit
Afterwards, the case where prompt user pays attention to Hydropower Unit.The present invention can be based on the real-time voltage value of acquisition, and dynamic adjusts overvoltage protection
Definite value, and after Hydropower Unit disconnection, prompt user's the case where paying attention to Hydropower Unit, avoid the erroneous judgement and tripping of off-the-line equipment
Situation improves the precision maneuver rate of disconnection device meanwhile, it is capable to mitigate workload for relay protection maintenance, commissioning staff, from
And power network safety operation and reliable power supply are ensured.
In conjunction with shown in Fig. 5, another disconnection device is shown, which includes：Voltage collector 110, microcontroller
120, prompting device 130, display 140, run indicator 150, malfunction indicator lamp 160, A/D converter 170,180 and of memory
Power processor 190.
Wherein, voltage collector 110, microcontroller 120 and prompting device 130 are identical as in above-described embodiment, in order to reduce
It repeats, please refers to foregoing description.
Specifically, display 140 is connected with microcontroller 120, and display 140 is for showing that voltage collector 110 acquires
Voltage value.Meanwhile display 140 can be also used for the frequency information that display voltage collector 110 acquires.
Microcontroller 120 is additionally operable to the operating condition of detection disconnection device, when it is normal operation to detect disconnection device, hair
The number of delivering letters is to run indicator 150, to prompt user's disconnection device normal operation, when detecting disconnection device failure, sends
Signal is to malfunction indicator lamp 160, to prompt user's disconnection device to break down.
A/D converter 170 is arranged between voltage collector 110 and microcontroller 120, and A/D converter 170 is used for voltage
The collected simulated voltage value of collector is converted to digitized voltage value.
Memory 180 is connected with microcontroller 120, and memory 180 is used to store the action situation of Hydropower Unit.It is convenient in this way
User can check the function situation of Hydropower Unit, understand the operating condition in power station in time.Wherein, the running feelings of Hydropower Unit
Condition means the case where Hydropower Unit disconnects at what point in time.
Power processor 190 is connected with microcontroller 120, and power processor 190, will for being connected with the outlet in power station
Voltage value in the outlet in power station is changed into operating voltage, and electric energy is provided for microcontroller 120.
Optionally, further include：Human-computer interaction interface, human-computer interaction interface are fixed for receiving overvoltage protection input by user
Value, microcontroller can be made according to the ON/OFF of overvoltage protection definite value and real-time voltage value control Hydropower Unit.
Specifically, real-time voltage value can be based on automatically into Mobile state by microcontroller 120 for overvoltage protection definite value
Adjustment, can also receive overvoltage protection definite value input by user, that is, user directly assigns solution and equips by human-computer interaction interface
An overvoltage protection definite value is set, it is passive to adjust.Disconnection device provided by the invention by two ways assignment overvoltage protection definite value,
Power network safety operation and reliable power supply are ensured.
In conjunction with shown in Fig. 6 and Fig. 7, Fig. 6 shows the front elevation of disconnection device；Fig. 7 shows the back view of disconnection device.
In conjunction with shown in Fig. 6, including：Liquid crystal display, the button of upper and lower page turning, ACK button, reset button, operation refer to
Show lamp, malfunction indicator lamp, trip indicator light.Wherein, the button of upper and lower page turning, ACK button in order to control press by liquid crystal display
Button is function button.
Wherein, reset button is connected with microcontroller, and reset button is for receiving user's reset instruction, so that microcontroller controls
Disconnection device resets.
In conjunction with shown in Fig. 7, the back side of disconnection device includes：Ground protection port, power control button, voltage collector
Interface, output interface.
Wherein, voltage collector interface (2) input, input tool 1 and are used to connect voltage collector there are two interface, with
The real-time voltage value that can receive voltage collector acquisition, is input in microcontroller.Output interface (output 1 and output 2, output 1
There are two interface 3 and 4,2 tools of output, and breaker is connected there are two interface 5 and 6) for tool, and control signal is exported by output interface, until
Breaker, to control breaker running.
Embodiment two：
The embodiment of the present invention additionally provides a kind of hydroelectric system, is applied in power station, including：Multiple Hydropower Units and root
According to above-described embodiment any one of them disconnection device, the disconnection device is used to control the ON/OFF of multiple Hydropower Units,
In, multiple Hydropower Unit paired runnings.
In conjunction with shown in Fig. 8, hydroelectric system includes multiple Hydropower Units, that is, 1~Hydropower Unit of Hydropower Unit n, wherein n
=2,3,4,5......, disconnection device provided by the invention can control multiple Hydropower Unit trippings simultaneously.
In conclusion hydroelectric system provided in an embodiment of the present invention is adopted by adding disconnection device by voltage collector
The real-time voltage value of collection power station outlet, real-time voltage value of the microcontroller based on acquisition, dynamic adjustment overvoltage protection definite value, and
When real-time voltage value is more than current overvoltage protection definite value, the disconnection of Hydropower Unit is controlled, prompting device carries after Hydropower Unit disconnection
Show that the case where user pays attention to Hydropower Unit, the present invention can be based on the real-time voltage values of acquisition, dynamic adjusts overvoltage protection definite value,
And after Hydropower Unit disconnection, user's the case where paying attention to Hydropower Unit is prompted, erroneous judgement and the tripping situation of off-the-line equipment are avoided,
Meanwhile, it is capable to mitigate workload for relay protection maintenance, commissioning staff, the precision maneuver rate of disconnection device is improved, to protect
Power network safety operation and reliable power supply are hindered.Meanwhile a disconnection device can control the ON/OFF of multiple Hydropower Units,
Realize the function of " machine is controlled more ".
As an example, in conjunction with shown in Fig. 9, including two Hydropower Units, each hydroelectric machine in No. 1 power station in Fig. 9
Group includes a hydroelectric machine and a breaker, wherein 2 hydroelectric machine paired running power generations, when real-time voltage value can be to power grid
In circuit, power station motor can cause high pressure accident, off-the-line device action, while controlling the relay in power station respectively
QF1 and relay QF2 are disconnected, to disconnect No. 1 hydroelectric machine, No. 2 hydroelectric machines in No. 1 power station.
In addition, power station according to the ... of the embodiment of the present invention other compositions and effect for this field ordinary skill people
All it is known for member, in order to reduce redundancy, does not repeat.
Unless specifically stated otherwise, the opposite step of the component and step that otherwise illustrate in these embodiments, digital table
It is not limit the scope of the invention up to formula and numerical value.
In all examples being illustrated and described herein, any occurrence should be construed as merely illustrative, without
It is as limitation, therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for description purposes only, and is not understood to indicate or imply relative importance.
Finally it should be noted that：Embodiment described above, only specific implementation mode of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
In the technical scope disclosed by the present invention, it can still modify to the technical solution recorded in previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of disconnection device, which is characterized in that including：Voltage collector, microcontroller, prompting device；The microcontroller respectively with
The voltage collector, the prompting device are connected；
The voltage collector acquires the real-time voltage value of the power station outlet for being connected with the outlet in power station；
The microcontroller with Hydropower Unit for being connected, the real-time voltage value based on acquisition, and dynamic adjusts overvoltage protection definite value, and
When real-time voltage value is more than current overvoltage protection definite value, the disconnection of the Hydropower Unit is controlled；
The case where prompting device is used for after Hydropower Unit disconnection, and prompt user pays attention to the Hydropower Unit.
2. the apparatus according to claim 1, which is characterized in that further include：Display, the display and the microcontroller
It is connected, the display is used to show the voltage value of the voltage collector acquisition.
3. the apparatus according to claim 1, which is characterized in that further include：Run indicator and malfunction indicator lamp.
4. device according to claim 3, which is characterized in that the microcontroller is additionally operable to detect the fortune of the disconnection device
Market condition sends a signal to the run indicator, to prompt user institute when it is normal operation to detect the disconnection device
Disconnection device normal operation is stated, when detecting the disconnection device failure, sends a signal to the malfunction indicator lamp, with prompt
Disconnection device described in user breaks down.
5. the apparatus according to claim 1, which is characterized in that further include：A/D converter, the A/D converter setting exist
Between the voltage collector and the microcontroller, the A/D converter is used for voltage collector is collected simulated
Voltage value is converted to digitized voltage value.
6. the apparatus according to claim 1, which is characterized in that further include：Memory, the memory and the microcontroller
It is connected, the memory is used to store the action situation of the Hydropower Unit.
7. the apparatus according to claim 1, which is characterized in that further include：Reset button, the reset button and the list
Piece machine is connected, and the reset button is for receiving user's reset instruction, so that the microcontroller controls the disconnection device and resets.
8. the apparatus according to claim 1, which is characterized in that further include：Power processor, the power processor and institute
It states microcontroller to be connected, the power processor, will be in the outlet in the power station for the outlet in the power station being connected
Voltage value be changed into operating voltage, provide electric energy for the microcontroller.
9. the apparatus according to claim 1, which is characterized in that further include：Human-computer interaction interface, the human-computer interaction interface
For receiving overvoltage protection definite value input by user, the microcontroller can be made according to the overvoltage protection definite value and the reality
When voltage value control the ON/OFF of the Hydropower Unit.
10. a kind of hydroelectric system, which is characterized in that it is applied in power station, the system comprises：Multiple Hydropower Units and according to
Claim 1-9 any one of them disconnection devices, the disconnection device are used to control the ON/OFF of multiple Hydropower Units, wherein
Multiple Hydropower Unit paired runnings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810537211.7A CN108429243A (en) | 2018-05-29 | 2018-05-29 | Disconnection device and hydroelectric system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810537211.7A CN108429243A (en) | 2018-05-29 | 2018-05-29 | Disconnection device and hydroelectric system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108429243A true CN108429243A (en) | 2018-08-21 |
Family
ID=63164596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810537211.7A Pending CN108429243A (en) | 2018-05-29 | 2018-05-29 | Disconnection device and hydroelectric system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108429243A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429608A (en) * | 2019-08-19 | 2019-11-08 | 广东电网有限责任公司 | A kind of network system and its disconnection device and Splitting Control |
| CN112134311A (en) * | 2020-09-15 | 2020-12-25 | 广东电网有限责任公司韶关供电局 | Control method, device, equipment and storage medium for small hydropower station power grid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075438A (en) * | 2018-01-05 | 2018-05-25 | 广东电网有限责任公司韶关供电局 | A kind of method of self-adaptive sites protective device definite value |
-
2018
- 2018-05-29 CN CN201810537211.7A patent/CN108429243A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075438A (en) * | 2018-01-05 | 2018-05-25 | 广东电网有限责任公司韶关供电局 | A kind of method of self-adaptive sites protective device definite value |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429608A (en) * | 2019-08-19 | 2019-11-08 | 广东电网有限责任公司 | A kind of network system and its disconnection device and Splitting Control |
| CN112134311A (en) * | 2020-09-15 | 2020-12-25 | 广东电网有限责任公司韶关供电局 | Control method, device, equipment and storage medium for small hydropower station power grid |
| CN112134311B (en) * | 2020-09-15 | 2022-06-14 | 广东电网有限责任公司韶关供电局 | Control method, device, equipment and storage medium for small hydropower station power grid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3817174B1 (en) | Nested microgrid control system | |
| AU2021204455B2 (en) | Utility meter for use with distributed generation device | |
| CN102255330A (en) | Device and method for detecting island of micro power grid system | |
| CN105375498A (en) | Three-phase phase-change switch device | |
| CN108194339A (en) | There is the water pump intelligent control system of fault self-checking | |
| CN108695889B (en) | High-efficient photovoltaic inverter capable of sharing operation and maintenance | |
| CN204424700U (en) | A kind of power supply unit of intelligent power distribution cabinet | |
| CN202649381U (en) | GOOSE-based small-current grounding route selection system of intelligent transformer substation | |
| CN103855722A (en) | Micro-grid connection device | |
| CN108429243A (en) | Disconnection device and hydroelectric system | |
| CN109932601A (en) | The method that the grid-connected circuit of star-like statodyne group is detected with anti-power transmission | |
| CN104393602B (en) | Adjusting method and device for distributed energy resource network | |
| CN106207999A (en) | The guard method of a kind of photovoltaic plant DC side circuit and device | |
| CN109387724A (en) | Based on the lateral modified synchronous capacitor method for diagnosing faults of vertical analysis | |
| CN106685083B (en) | Intelligent power distribution terminal and method for analyzing electricity utilization behavior of charging pile | |
| CN204681157U (en) | A kind of intelligent double-power control system | |
| CN108631319A (en) | Off-the-line method, apparatus and equipment | |
| CN204287858U (en) | A kind of intelligent agriculture row table | |
| CN204030624U (en) | A kind of grid-connected anti-backflow device | |
| CN107069662B (en) | A kind of method of the flexible direct current control system both-end without stream tripping | |
| CN104460459A (en) | Intelligent agricultural drainage meter | |
| CN110649651B (en) | Alternating current-direct current bidirectional converter, adaptive method thereof and electronic device | |
| CN114285371A (en) | High-reliability intelligent monitoring communication combiner box and method for photovoltaic power generation system | |
| CN207612055U (en) | A kind of Distribution Network Failure automatic station-keeping system | |
| CN103795141A (en) | DC reclosing switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |