CN106487040A - Photovoltaic electric network control method and device - Google Patents
Photovoltaic electric network control method and device Download PDFInfo
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- CN106487040A CN106487040A CN201510530981.5A CN201510530981A CN106487040A CN 106487040 A CN106487040 A CN 106487040A CN 201510530981 A CN201510530981 A CN 201510530981A CN 106487040 A CN106487040 A CN 106487040A
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- electrical network
- photovoltaic electrical
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- photovoltaic
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
Abstract
The invention discloses a kind of photovoltaic electric network control method, obtain the control instruction of photovoltaic electrical network；Obtain the current status information of photovoltaic electrical network；Obtain the target instruction target word of each node in photovoltaic electrical network according to described control instruction, current status information and default regulation policy calculation；The corresponding output adjusting each node of target instruction target word according to each node.The invention also discloses a kind of photovoltaic power grid control device.The present invention can automatically control the opening and closing of inverter in photovoltaic electrical network, realizes remotely control, and response time is short, it is little to adjust error rate, can reduce cost of labor, improve the safety of operation of power networks simultaneously.
Description
Technical field
The present invention relates to photovoltaic generation control technology field, more particularly, to a kind of photovoltaic electric network control method and
Device.
Background technology
Growing to the demand of the energy with the whole world, the mankind have been faced with two hang-ups：One is on the earth
The limited fuel source of reserves and the energy crisis that causes；Two is a large amount of burning institutes with Fossil fuels such as coals
The CO of discharge2And SO2Gas, the environmental pollution leading to and greenhouse effect, make the living environment of the mankind not
Disconnected deterioration.Accelerated development is cleaned and reproducible solar energy, reduces greenhouse gas emissions, it has also become complete
The common recognition of ball.Many countries all using photovoltaic generation as the project of first developing, and built many MW class
Sunlight power station, starts " roof photovoltaic " plan, carries out installing generating by solar in units of family.
Brainstrust was just foretold before more than 20 years：Photovoltaic is one of forward position of 21 century hi-tech development, in advance
Survey in the middle of this century, photovoltaic generation will become one of important generation technology.
In field of photovoltaic power generation, due to solar energy resources randomness, intermittent and periodically etc. characteristic with
And the feature of the region dispersibility of photovoltaic power station, lead to having of distributed photovoltaic grid-connected system
Power control system is complicated difficult a lot.At present, the active power of domestic a lot of photovoltaic power station is to pass through
Manual adjustment, by way of start and stop inverter.The defect of this control device has a lot, such as loud
Long between seasonable, regulation error rate Yamato work cost height etc..
Content of the invention
Present invention is primarily targeted at proposing a kind of photovoltaic electric network control method and device it is intended to realize certainly
Dynamic control photovoltaic electrical network.
For achieving the above object, a kind of Poewr control method that the present invention provides, methods described includes following
Step：Obtain the control instruction of photovoltaic electrical network；Obtain the current status information of photovoltaic electrical network；According to described
Control instruction, current status information and default regulation policy calculation obtain each node in photovoltaic electrical network
Target instruction target word；The corresponding output adjusting each node of target instruction target word according to each node.
Preferably, the described control instruction according to photovoltaic electrical network, current status information and default regulation
The step that policy calculation obtains the target instruction target word of each node in photovoltaic electrical network includes：According in photovoltaic electrical network
Control command calculate obtain photovoltaic electrical network in each node output desired value；According to photovoltaic electrical network
In the desired value of each node output and the default regulation strategy of each node corresponding obtain corresponding each
The target instruction target word of node, wherein, described target instruction target word includes active power target instruction, reactive power mesh
Mark instruction and/or power factor (PF) target instruction target word.
Preferably, the described control instruction according to photovoltaic electrical network, current status information and default regulation
The step that policy calculation obtains the target instruction target word of each node in photovoltaic electrical network also includes：According to current shape
In state information, intensity of illumination judges whether the output sum of all nodes in photovoltaic electrical network is more than described control
Desired value in system instruction；If the current output sum of all nodes is more than described in photovoltaic electrical network
Desired value in control instruction, then according to the current output of each node in photovoltaic electrical network and described control
Desired value in system instruction calculates the quantity obtaining the node needing to open；Judge in current status information
Whether the quantity being in the node of opening is more than the quantity of the node needing to open；If current shape
The quantity being in the node of opening in state information is more than the quantity of the node needing to open, then at acquisition
In the node of opening can dormancy node quantity；The described target instruction target word pair according to each node
The step that the output of each node should be adjusted includes：Accumulative grid-connected from the node being in opening
Time the longest node starts, dormancy correspondence can dormancy quantity node.
Preferably, judging whether the quantity being in the node of opening in current status information is more than needs
Include after the step of the quantity of node to be opened：If being in opening in current status information
Node quantity be less than need open node quantity, then obtaining in node in a dormant state needs
The quantity of the node opened；The output of the described target instruction target word according to each node each node of corresponding regulation
The step of power also includes：From the beginning of adding up the shortest node of grid-connected time from node in a dormant state,
Open the node of the quantity that correspondence need to be opened.
Preferably, the described the longest node of grid-connected time that adds up from the node being in opening starts to stop
Also include after the step of node of corresponding described quantity of sleeping：It is separated by preset time when described accumulative grid-connected
Between node the longest start the node of the corresponding described quantity of dormancy one by one.
Preferably, methods described also includes：Be separated by described preset time re-execute acquisition photovoltaic electrical network work as
The step of front status information.
Additionally, for achieving the above object, the present invention also provides a kind of output control device, described device bag
Include：First acquisition module, for obtaining the control instruction of photovoltaic electrical network；Second acquisition module, is used for obtaining
Obtain the current status information of photovoltaic electrical network；Computing module, for according to described control instruction, current shape
The target instruction target word of each node in state information and default regulation policy calculation acquisition photovoltaic electrical network；Adjust mould
Block, for the corresponding output adjusting each node of target instruction target word according to each node.
Preferably, described computing module includes：First computing unit, for according to the control in photovoltaic electrical network
System order calculates the desired value obtaining each node output in photovoltaic electrical network；First obtains unit, uses
In the default regulation plan according to the desired value of each node output in photovoltaic electrical network and each node corresponding
Slightly obtain the target instruction target word of each node corresponding, wherein, described target instruction target word includes active power target and refers to
Make, reactive power target instruction target word and/or power factor (PF) target instruction target word.
Preferably, described computing module also includes：First judging unit, for according to current state letter
In breath, intensity of illumination judges in photovoltaic electrical network, whether the current output sum of all nodes is more than described control
Desired value in system instruction；Second computing unit, if the output work for all nodes in photovoltaic electrical network
Rate sum is more than the desired value in described control instruction, the then output work according to each node in photovoltaic electrical network
Desired value in rate and described control instruction calculates the quantity obtaining the node needing to open；Second judges list
Unit, whether the quantity for judging the node being in opening in current status information is opened more than needs
The quantity of the node opening；Second obtaining unit, if be in opening in current state information
The quantity of node is more than the quantity of the node needing to open, then obtain in the node be in opening and can stop
The quantity of the node slept；Described adjustment module includes being additionally operable to adding up simultaneously from the node being in opening
Net time the longest node starts, dormancy correspondence can dormancy quantity node.
Preferably, described computing module also includes：3rd obtaining unit, if for current state letter
The quantity being in the node of opening in breath is less than the quantity of the node needing to open, then obtain and be in not
The quantity of the node of unlatching is needed in the node of dormancy state；Described adjustment module is additionally operable to from a dormant state
Node in add up the shortest node of grid-connected time and start, open the node of the quantity that correspondence need to be opened.
Preferably, to be additionally operable to be separated by preset time tired from the node being in opening for described adjustment module
Count the node that the longest node of grid-connected time starts the corresponding described quantity of dormancy one by one.
Preferably, being separated by described in described preset time the second acquisition module, to regain photovoltaic electrical network current
Status information.
The present invention passes through to obtain the control instruction of photovoltaic electrical network；Obtain the current status information of photovoltaic electrical network；
Obtained in photovoltaic electrical network according to described control instruction, current status information and default regulation policy calculation
The target instruction target word of each node；The corresponding output work adjusting each node of target instruction target word according to each node
Rate.By the way, the present invention can automatically control the opening and closing of inverter in photovoltaic electrical network, real
Existing remotely control, response time is short, it is little to adjust error rate, can reduce cost of labor, improve electricity simultaneously
The safety of network operation.
Brief description
Fig. 1 is the schematic flow sheet of photovoltaic electric network control method first embodiment of the present invention；
Fig. 2 is according to described control instruction, current status information and default regulation in the embodiment of the present invention
Policy calculation obtains a kind of schematic flow sheet of the target instruction target word of each node in photovoltaic electrical network；
Fig. 3 is according to described control instruction, current status information and default regulation in the embodiment of the present invention
Policy calculation obtains another kind of schematic flow sheet of the target instruction target word of each node in photovoltaic electrical network；
Fig. 4 is the high-level schematic functional block diagram of photovoltaic electric network control method first embodiment of the present invention；
Fig. 5 is a kind of refinement high-level schematic functional block diagram of computing module of the present invention；
Fig. 6 is another kind of refinement high-level schematic functional block diagram of computing module of the present invention.
The realization of the object of the invention, functional characteristics and advantage will be done further in conjunction with the embodiments referring to the drawings
Explanation.
Specific embodiment
It should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to limit
Determine the present invention.
The present invention provides a kind of photovoltaic electric network control method.
Refer to Fig. 1, Fig. 1 is the schematic flow sheet of photovoltaic electric network control method first embodiment of the present invention.
In the present embodiment, this photovoltaic electric network control method includes：
Step S10, obtains the control instruction of photovoltaic electrical network；
Management personnel need control photovoltaic electrical network when, than if desired for adjustment photovoltaic electrical network output when,
Can by data acquisition and supervisor control (Supervisory Control AndDataAcquisition,
SCADA input menu input control instruction), described control instruction can include active power controller and refer to
Make, Reactive Power Control instruction and power control instruction one of or two or more combination.?
After input control instruction, it is sent to the Management Controller of photovoltaic electrical network by Ethernet, certainly can also lead to
Cross other modes to send, such as sent using SIM.In being embodied as can also by local computing or
Person's webserver inputs control instruction.Can also be according to the feedback of user power utilization amount in more enforcement
Information automatically obtains.Step S20 is entered after obtaining control instruction.
Step S20, obtains the current status information of photovoltaic electrical network；
The control instruction being obtained according to step S10, obtains the current status information of described photovoltaic electrical network, institute
State status information and can include but is not limited to the DC input voitage of each node, light in described photovoltaic electrical network
Output according to intensity, unlatching number of nodes and each node.Described state can be by described management
The sensing layer monitoring photovoltaic electrical network in controller is collected, and the real time data of described photovoltaic electrical network can be led to simultaneously
Cross Management Controller and be sent to data acquisition and supervisor control in real time, facilitate management personnel or other
Personnel are checked.Certainly can also be obtained by the sensing layer perception of photovoltaic each node of electrical network.Obtain
Step S30 is entered after the current status information of photovoltaic electrical network.
Step S30, obtains according to described control instruction, current status information and default regulation policy calculation
Obtain the target instruction target word of each node in photovoltaic electrical network；
Control instruction is obtained according to step S10 and step S20 obtains the current status information of photovoltaic electrical network,
The desired value of output in parsing control command, then in conjunction with each node itself in described photovoltaic electrical network
Default regulation policy calculation obtains the target instruction target word of each node.Described target instruction target word can include but not
It is limited to the desired value of output.Such as according to generated output, time in multiple node current state informations
Calculate each node with weather condition or part of nodes completes the time of desired value needs, the quantity opened
And output.In described photovoltaic electrical network, the control mode of multiple nodes can be different, such as some sections
By adjusting active power, other pass through reactive power compensation to point, multiple in certainly described photovoltaic electrical network
The control mode of node can also be identical.Step S40 is entered after obtaining described target instruction target word.
Step S40, according to the corresponding output adjusting each node of target instruction target word of each node.
Corresponding regulation is carried out according to the target instruction target word of each node in the photovoltaic electrical network that step S30 obtains,
Such as according to itself regulative mode of each node, by adjusting active power regulation.Preferably, after regulation
In photovoltaic electrical network, each node output sum is more than the desired value of active power in described control instruction.
The present invention passes through to obtain the control instruction of photovoltaic electrical network；Obtain the current status information of photovoltaic electrical network；
Obtained in photovoltaic electrical network according to described control instruction, current status information and default regulation policy calculation
The target instruction target word of each node；The corresponding output work adjusting each node of target instruction target word according to each node
Rate.By the way, the present invention can automatically control the opening and closing of inverter in photovoltaic electrical network, real
Existing remotely control, response time is short, it is little to adjust error rate, can reduce cost of labor, improve electricity simultaneously
The safety of network operation.
Refer to Fig. 2, Fig. 2 is according to described control instruction, current status information in the embodiment of the present invention
Adjust a kind of stream that policy calculation obtains the desired value of each node output in photovoltaic electrical network with default
Journey schematic diagram.
Based on photovoltaic electric network control method first embodiment of the present invention, step S30 includes：
Step S31, calculates according to the control command in photovoltaic electrical network and obtains each node output in photovoltaic electrical network
The desired value of power；
Parsing obtains the control instruction of photovoltaic electrical network in step S10, obtains desired value in control instruction, root
Calculate according to intensity of illumination in the desired value obtaining and current status information and obtain each node in photovoltaic electrical network
The desired value of output, subsequently into step S32.
Step S32, according to the desired value of each node output in photovoltaic electrical network and each node corresponding
The default strategy that adjusts obtains the target instruction target word corresponding to each node.
The desired value of each node output and correspondence in the photovoltaic electrical network obtaining are calculated according to step S31
The default regulation strategy of each node obtains the target instruction target word of each node corresponding, and described target instruction target word includes
Active power target instruction target word, reactive power target instruction target word and/or power factor (PF) target instruction target word.It is each node
The default strategy that adjusts can be the same or different, and such as a part of node passes through to adjust reactive power regulation
Output, has some to pass through to adjust power factor (PF) regulation output.
The present invention passes through defeated according to each node in the control command calculating acquisition photovoltaic electrical network in photovoltaic electrical network
Go out the desired value of power；According to the desired value of each node output in photovoltaic electrical network and each section corresponding
The default regulation strategy of point obtains the target instruction target word of each node corresponding.By the way, energy of the present invention
Desired value is adjusted according to different corresponding acquisition of regulative mode of node, thus adjusting output.
Refer to Fig. 3, Fig. 3 is according to described control instruction, current status information in the embodiment of the present invention
Adjust the another kind that policy calculation obtains the desired value of each node output in photovoltaic electrical network with default
Schematic flow sheet.
Based on photovoltaic electric network control method first embodiment of the present invention, step S30 includes：
According to intensity of illumination in current status information, step S33, judges that in photovoltaic electrical network, all nodes are current
Output sum whether more than the desired value in described control instruction；
Parsing obtains the control instruction of photovoltaic electrical network in step S10, obtains desired value in control instruction, root
Whether the output sum judging all nodes in photovoltaic electrical network according to intensity of illumination in current status information
More than the desired value in described control instruction it is preferable that described desired value is active power desired value.When
So maximum defeated of all nodes in photovoltaic electrical network can also be judged according to intensity of illumination in current status information
Whether go out power sum more than the desired value in described control instruction.If all nodes in photovoltaic electrical network
Output sum is more than the desired value in described control instruction, then enter step S34；If current state
The quantity being in the node of opening in information is less than the quantity of the node needing to open, then on display circle
Face is pointed out, and such as generated output desired value is too big.Certainly can also be without pointing out, such as open whole nodes,
User can see the data of real-time collecting in management system.
Step S34, according to the target in the output of each node and described control instruction in photovoltaic electrical network
Value calculates the quantity obtaining the node needing to open；
According to the judged result of step S33, if the output sum of all nodes is big in photovoltaic electrical network
Desired value in described control instruction, then according to the current output of each node in photovoltaic electrical network and
Desired value in described control instruction calculates the quantity obtaining the node needing to open, and is such as obtained according to parsing
The active power desired value obtaining and the ratio of the output of each node in photovoltaic electrical network, obtain needs and open
The quantity of the node opening.Calculate and enter step S35 after obtaining the quantity of node needing to open.
Step S35, judges whether the quantity being in the node of opening in current state information is more than needs
The quantity of the node opened；
Calculate the quantity obtaining the node needing to open according to step S34, photovoltaic is obtained according to step S20
It is in the quantity of the node of opening in the current status information of electrical network, judge place in current state information
Whether the quantity in the node of opening is more than the quantity obtaining the node needing to open in step S34.
If the quantity being in the node of opening in current state information is more than the number of the node needing to open
Amount, then enter step S36, otherwise enters step S37.
Step S36, obtain be in the node of opening can dormancy node quantity；
According to the judged result of step S35, if in current state information, be in the node of opening
Quantity is more than the quantity of the node needing to open, then obtain be in the node of opening can dormancy section
The quantity of point, the quantity of the quantity node that can be equal to opening of node of dormancy can deduct needs and open
The quantity of the node opening.Obtain in the node be in opening and can enter step after the quantity of node of dormancy
Rapid S50.
Step S50, from the beginning of node the longest of grid-connected time accumulative described in the node being in opening,
Dormancy correspondence can dormancy quantity node；
This step can be a kind of specific embodiment of step S40, obtained according to step S36 and be in out
Open in the node of state can dormancy node quantity, the node of corresponding dormancy respective numbers.Preferably,
From the beginning of node the longest of grid-connected time accumulative described in the node being in opening, dormancy correspondence can be stopped
The node of the quantity slept.The described accumulative grid-connected time is that in photovoltaic electrical network, each node is in opening
Grid-connected time sum, that is, calculate after each node puts into effect in photovoltaic electrical network and add up the grid-connected time to acquisition
When, repeatedly it is in the grid-connected time sum of opening it is preferable that the described accumulative grid-connected time with the second is
Unit, certainly can also by point or hour in units of.Specifically be in photovoltaic electrical network each section
When point is not on opening grid-connected state if there is fault or closed mode etc. during operation,
Its accumulative grid-connected time does not increase, and also forbids understanding the accumulative grid-connected time of each node history.Preferably,
The accumulative grid-connected time of each node is backed up at regular intervals afterwards in phase, is such as separated by 4 seconds and carries out
Backup, if there is abnormal feelings such as accumulative grid-connected time error or log file loss during convenient use
Condition, can be defined by the accumulative grid-connected time of backup, improve the accuracy adding up the grid-connected time.
Step S37, obtains the quantity of the node needing in node in a dormant state to open；
According to the judged result of step S35, if in current state information, be in the node of opening
Quantity is less than the quantity of the node needing to open, then explanation current power deficiency needs to open more nodes
Improve output, the output according to described desired value and current state calculates acquisition and is in dormancy shape
The quantity of the node of unlatching is needed, subsequently into step S60 in the node of state.Preferably, if step S35
Judged result be current state information in be in opening node quantity be equal to need open section
The quantity of point, opens the node of predetermined number.
Step S60, from the beginning of node the shortest of grid-connected time accumulative described in node in a dormant state,
Open the node of the quantity that correspondence need to be opened.
This step can be another kind of specific embodiment of step S40, the place being obtained according to step S37
Need the quantity of the node of unlatching in the node of resting state, it is right to open in node in a dormant state
Answer the node of quantity it is preferable that judging to add up simultaneously described in node in a dormant state in current state
Net time the shortest node, adds up the shortest node of grid-connected time described in the node in a dormant state
Start to open the node of respective numbers.Can not certainly open corresponding in node in a dormant state
The node of quantity, such as closes, according to the accumulative grid-connected time, the node adding up grid-connected time length in opening,
The corresponding node opened in a dormant state.
In being embodied as can also being turned on or off of adjustment node in other way, be such as separated by
Preset time adds up the grid-connected time to the described of all nodes collected, and is carried out according to the accumulative grid-connected time
Sequence, determine need open node when, according to obtain desired value from described add up the grid-connected time
Short node starts, and is added output in each node current state until meeting desired value, thus
Obtain the quantity of node and the address of node of unlatching or the mark meeting desired value, it is right to be then turned on
Answer the node of address or mark；Or determine need closed node when, according to obtain desired value
Add up the longest node of grid-connected time described in the node of opening and begin to shut off node to satisfaction from being in
Desired value.If it is determined that two or more nodes being turned on or off to needs is accumulative grid-connected
When time is identical, can be grid-connected for the last time according to the current condition selecting of two or more nodes
The node that time is short or present output power is big.If user is in advance to each node in being embodied as
Address or identification information carry out region process, such as previously according to node generated energy from big to small to section
Point address or identification information sequence, determine need be turned on or off two or more
The accumulative grid-connected time of node is at the same time it can also by address or identification information, preferably select address
Or the node of identification information front, the forward node intensity of illumination that sorts is big, may be such that more
Node dormancy.
In a preferred embodiment, after above-mentioned steps have executed, it is separated by preset time and re-executes acquisition
The step of the current status information of photovoltaic electrical network is it is preferable that in each one node of dormancy, again hold
The step that row obtains the current status information of photovoltaic electrical network, can carry out calculating simultaneously in each execution dormancy
Checking.Obtain the status information after preset time, then judge to export in the state after preset time active
Whether power sum is more than described desired value.If exported in the status information of all nodes after preset time
Active power sum is less than described desired value, then re-execute according to described control instruction, current state
The step of the desired value of each node output in information and default regulation policy calculation acquisition photovoltaic electrical network
And execute the step that the desired value according to output carries out corresponding regulation suddenly,.If after preset time
Status information in active power of output sum be more than or equal to described desired value, then do not carry out any place
Reason or the accumulative grid-connected time according to each node, first closing accumulative total time the longest node, then
Correspond to the node opening respective numbers so that the accumulative grid-connected time of each node generally remains identical.Tool
Body can not also be sentenced in implementing after re-executing the step obtaining the current status information of photovoltaic electrical network
Disconnected, such as directly re-execute above-mentioned steps, until calculate needing the nodes opened to be 0 or be
Negative.
The present invention passes through to judge all nodes in photovoltaic electrical network according to intensity of illumination in current status information
Whether output sum is more than the desired value in described control instruction；If all nodes in photovoltaic electrical network
Output sum be more than described control instruction in desired value, then according to each node in photovoltaic electrical network
Output and described control instruction in desired value calculate obtain need open node quantity；Sentence
Whether the quantity of node being in opening in disconnected current status information is more than the node needing unlatching
Quantity；If the quantity being in the node of opening in current status information is more than the section needing to open
The quantity of point, then obtain be in the node of opening can dormancy node quantity；From being in unlatching
Add up the longest node of grid-connected time described in the node of state to start, dormancy correspondence can dormancy quantity
Node；If the quantity being in the node of opening in current status information is less than the section needing to open
The quantity of point, then obtain the quantity of the node needing to open in node in a dormant state；From being in dormancy
Add up the shortest node of grid-connected time described in the node of state to start, open the quantity that correspondence need to be opened
Node.By the way, the present invention first judges whether photovoltaic electrical network can enter park mode, if
Judged result is to enter park mode, then accumulative grid-connected time of each node according to statistics and currently
The nodes opened in state are accordingly turned on or off the node of respective amount, and power distribution is reasonable.This
Invention can control photovoltaic electrical network to enter intelligent dormancy, on the premise of meeting generating target so that each
Node adds up the grid-connected time and keeps in balance, thus controlling the loss situation of each node to keep in balance.
The present invention further provides a kind of photovoltaic power grid control device.
Refer to Fig. 4, Fig. 4 is that the functional module of photovoltaic electric network control method first embodiment of the present invention is illustrated
Figure.
In the present embodiment, this photovoltaic power grid control device includes：
First acquisition module 10, for obtaining the control instruction of photovoltaic electrical network.
Management personnel need control photovoltaic electrical network when, than if desired for adjustment photovoltaic electrical network output when,
Can by data acquisition and supervisor control (Supervisory Control And Data Acquisition,
SCADA input menu input control instruction), described control instruction can include active power controller and refer to
Make, Reactive Power Control instruction and power control instruction one of or two or more combination.?
After input control instruction, it is sent to the Management Controller of photovoltaic electrical network by Ethernet, certainly can also lead to
Cross other modes to send, such as sent using SIM.In being embodied as can also by local computing or
Person's webserver inputs control instruction.Can also be according to the feedback of user power utilization amount in more enforcement
Information automatically obtains.
Second acquisition module 20, the status information current for obtaining photovoltaic electrical network, described status information bag
Include：The output of DC input voitage, intensity of illumination and each node.
Obtain, according to first, the control instruction that module 10 obtains, obtain the current state letter of described photovoltaic electrical network
Breath, described status information can include but is not limited to the direct current input electricity of each node in described photovoltaic electrical network
Pressure, the output of intensity of illumination, unlatching number of nodes and each node.Described state can pass through institute
State the sensing layer collection monitoring photovoltaic electrical network in Management Controller, the real time data of described photovoltaic electrical network simultaneously
Data acquisition and supervisor control can be sent in real time by Management Controller, facilitate management personnel or
Person other staff are checked.Certainly can also be obtained by the sensing layer perception of photovoltaic each node of electrical network.
Computing module 30, for according to described control instruction, current status information and the regulation plan of itself
Approximation calculates the desired value obtaining each node output in photovoltaic electrical network.
Obtain module 10 acquisition control instruction according to first and the second acquisition module 20 obtains photovoltaic electrical network and works as
Front status information, the desired value of output in parsing control command, then in conjunction with described photovoltaic electrical network
In the default policy calculation that adjusts of each node itself obtain the target instruction target word of each node.Described target refers to
Order can include but is not limited to the desired value of output.Such as according in multiple node current state informations
Generated output, time and weather condition calculate each node or part of nodes complete desired value needs when
Between, open quantity and output.In described photovoltaic electrical network, the control mode of multiple nodes can not
With such as some nodes pass through to adjust active power, and other pass through reactive power compensation, certainly described
In photovoltaic electrical network, the control mode of multiple nodes can also be identical.
Adjustment module 40, for the corresponding output work adjusting each node of target instruction target word according to each node
Rate.
Corresponding tune is carried out according to the target instruction target word of each node in the photovoltaic electrical network that computing module 30 obtains
Section, such as according to itself regulative mode of each node, by adjusting active power regulation.Preferably, adjust
In photovoltaic electrical network after section, each node output sum is more than the target of active power in described control instruction
Value.
The present invention passes through to obtain the control instruction of photovoltaic electrical network；Obtain the current status information of photovoltaic electrical network；
Obtained in photovoltaic electrical network according to described control instruction, current status information and default regulation policy calculation
The target instruction target word of each node；The corresponding output work adjusting each node of target instruction target word according to each node
Rate.By the way, the present invention can automatically control the opening and closing of inverter in photovoltaic electrical network, real
Existing remotely control, response time is short, it is little to adjust error rate, can reduce cost of labor, improve electricity simultaneously
The safety of network operation.
Refer to Fig. 5, Fig. 5 is the refinement high-level schematic functional block diagram of computing module of the present invention.
Based on photovoltaic power grid control device first embodiment of the present invention, computing module 30 includes：
First computing unit 31, obtains in photovoltaic electrical network for being calculated according to the control command in photovoltaic electrical network
The desired value of each node output.
Parsing first obtains the control instruction that module 10 obtains photovoltaic electrical network, obtains desired value in control instruction,
Calculated according to intensity of illumination in the desired value obtaining and current status information and obtain each section in photovoltaic electrical network
The desired value of point output power.
First obtains unit 32, for according to the desired value of each node output in photovoltaic electrical network and right
The default regulation strategy answering each node obtains the target instruction target word corresponding to each node, wherein, described target
Instruction includes active power target instruction, reactive power target instruction target word and/or power factor (PF) target instruction target word.
Calculate the desired value of each node output in the photovoltaic electrical network obtaining according to the first computing unit 31
Obtain the target instruction target word of each node corresponding with the default regulation strategy of each node corresponding, described target refers to
Order includes active power target instruction, reactive power target instruction target word and/or power factor (PF) target instruction target word.I.e. every
Individual node is preset regulation strategy and be can be the same or different, and such as a part of node passes through to adjust idle work(
Rate adjusts output, has some to pass through to adjust power factor (PF) regulation output.
The present invention passes through defeated according to each node in the control command calculating acquisition photovoltaic electrical network in photovoltaic electrical network
Go out the desired value of power；According to the desired value of each node output in photovoltaic electrical network and each section corresponding
The default regulation strategy of point obtains the target instruction target word of each node corresponding.By the way, energy of the present invention
Desired value is adjusted according to different corresponding acquisition of regulative mode of node, thus adjusting output.
Refer to Fig. 6, Fig. 6 is another kind of refinement high-level schematic functional block diagram of computing module of the present invention.
Based on photovoltaic power grid control device first embodiment of the present invention, computing module 30 also includes：
First judging unit 33, for judging in photovoltaic electrical network according to intensity of illumination in current status information
Whether the current output sum of all nodes is more than the desired value in described control instruction.
The control instruction that parsing obtains, obtains desired value in control instruction, according in current status information
Whether intensity of illumination judges the output sum of all nodes in photovoltaic electrical network more than in described control instruction
Desired value it is preferable that described desired value be active power desired value.Certainly can also be according to current
In status information, intensity of illumination judges in photovoltaic electrical network, whether the maximum output sum of all nodes is more than
Desired value in described control instruction.If the output sum of all nodes is more than institute in photovoltaic electrical network
State the desired value in control instruction, be then transferred to the second computing unit 34；If located in current state information
The quantity of the node opened less than needs in the quantity of the node of opening, then point out in display interface,
Such as generated output desired value is too big.Certainly can also be without pointing out, such as open whole nodes, Yong Huke
To see the data of real-time collecting in management system.
Second computing unit 34, if big for the current output sum of all nodes in photovoltaic electrical network
Desired value in described control instruction, then according to the current output of each node in photovoltaic electrical network and
Desired value in described control instruction calculates the quantity obtaining the node needing to open.
According to the judged result of the first judging unit 33, if in photovoltaic electrical network all nodes output
Sum is more than the desired value in described control instruction, then according to the output that each node in photovoltaic electrical network is current
Desired value in power and described control instruction calculates the quantity obtaining the node needing to open, such as basis
The active power desired value that parsing obtains and the ratio of the output of each node in photovoltaic electrical network, obtain
Need the quantity of the node of unlatching.
Second judging unit 35, for judging the quantity of the node being in opening in current state information
The quantity of the node whether opened more than needs.
Calculate the quantity obtaining the node needing to open according to the second computing unit 34, according to the second acquisition mould
Block 20 obtains the quantity of the node being in opening in the current status information of photovoltaic electrical network, judges current
Whether the quantity being in the node of opening in status information is opened more than the second computing unit 34 acquisition needs
The quantity of the node opening.
Second obtaining unit 36, if the quantity of the node for being in opening in current state information
More than the quantity needing the node opened, then obtain be in the node of opening can dormancy node
Quantity.
If the judged result of the second judging unit 35 is to be in the node of opening in current state information
Quantity be more than the quantity of the node needing to open, then obtain that be in the node of opening can dormancy
The quantity of node, the quantity of node of dormancy can be equal to the quantity of node of opening and deduct needs
The quantity of the node opened.
Adjustment module 40 is additionally operable to add up the longest section of grid-connected time described in the node of opening from being in
Point start, dormancy correspondence can dormancy quantity node.
Obtained according to the second obtaining unit 36 be in the node of opening can dormancy node quantity,
The node of corresponding dormancy respective numbers.Preferably, accumulative grid-connected described in the node of opening from being in
Time the longest node starts, dormancy correspondence can dormancy quantity node.Described add up the grid-connected time be
In photovoltaic electrical network, each node is in the grid-connected time sum of opening, that is, calculate each in photovoltaic electrical network
Node during the grid-connected time accumulative to acquisition, is repeatedly in the grid-connected time sum of opening after putting into effect,
Preferably, described add up the grid-connected time in seconds, certainly can also by point or hour in units of.Need
Special instruction be each node in photovoltaic electrical network during operation if there is fault or close shape
When state etc. is not on opening grid-connected state, its accumulative grid-connected time does not increase, and also forbids understanding each
The accumulative grid-connected time of node history.Preferably, the accumulative grid-connected time of each node be separated by certain
Backed up after time, be such as separated by 4 seconds and backed up, during convenient use if there is accumulative simultaneously
The abnormal conditions such as the error of net time or log file loss, can be defined by the accumulative grid-connected time of backup,
Improve the accuracy adding up the grid-connected time.
3rd obtaining unit 37, if the quantity of the node for being in opening in current state information
Less than the quantity needing the node opened, then obtain the node needing to open in node in a dormant state
Quantity.
According to the judged result of the second judging unit 35, if being in opening in current state information
The quantity of node is less than the quantity of the node needing to open, then explanation current power deficiency need to open more
Node improve output, acquisition is calculated according to the output of described desired value and current state and is in
The quantity of the node of unlatching is needed in the node of resting state.Preferably, if the sentencing of the second judging unit 35
Disconnected result is that the quantity of the node being in opening in current state information is equal to the node needing to open
Quantity, opens the node of predetermined number.
Adjustment module 40 is additionally operable to add up described in the node in a dormant state section the shortest of grid-connected time
Point starts, and opens the node of the quantity that correspondence need to be opened.
According to the number needing the node opened in the node in a dormant state that the 3rd obtaining unit 37 obtains
Amount, opens the node of respective amount it is preferable that judging current state in node in a dormant state
In add up the shortest node of grid-connected time described in node in a dormant state, from a dormant state
Add up the shortest node of grid-connected time described in node to start to open the node of respective numbers.Can certainly
In node in a dormant state, do not open the node of respective numbers, such as closed according to the accumulative grid-connected time
Close the node adding up grid-connected time length in opening, the corresponding node opened in a dormant state.
In being embodied as can also being turned on or off of adjustment node in other way, be such as separated by
Preset time adds up the grid-connected time to the described of all nodes collected, and is carried out according to the accumulative grid-connected time
Sequence, determine need open node when, according to obtain desired value from described add up the grid-connected time
Short node starts, and is added output in each node current state until meeting desired value, thus
Obtain the quantity of node and the address of node of unlatching or the mark meeting desired value, it is right to be then turned on
Answer the node of address or mark；Or determine need closed node when, according to obtain desired value
Add up the longest node of grid-connected time described in the node of opening and begin to shut off node to satisfaction from being in
Desired value.If it is determined that two or more nodes being turned on or off to needs is accumulative grid-connected
When time is identical, can be grid-connected for the last time according to the current condition selecting of two or more nodes
The node that time is short or present output power is big.If user is in advance to each node in being embodied as
Address or identification information carry out region process, such as previously according to node generated energy from big to small to section
Point address or identification information sequence, determine need be turned on or off two or more
The accumulative grid-connected time of node is at the same time it can also by address or identification information, preferably select address
Or the node of identification information front, the forward node intensity of illumination that sorts is big, may be such that more
Node dormancy.
In a preferred embodiment, it is separated by preset time first acquisition module 10 and re-execute acquisition photovoltaic electric
Net current status information it is preferable that in each one node of dormancy, re-executing acquisition photovoltaic electric
The step netting current status information, can be calculated and be verified in each execution dormancy.Obtain pre-
Put the status information after the time, then judge in the state after preset time active power of output sum whether
More than described desired value.If active power of output sum in the status information of all nodes after preset time
Less than described desired value, then computing module 30 re-executes according to described control instruction, current state letter
The step of the desired value of each node output in breath and the regulation policy calculation of itself acquisition photovoltaic electrical network
And the desired value that executes according to output carries out corresponding regulation suddenly,.If the state after preset time
In information active power of output sum be more than or equal to described desired value, then do not carry out any process or
According to the accumulative grid-connected time of each node, first close accumulative total time the longest node, then correspondence is opened
Open the node of respective numbers so that the accumulative grid-connected time of each node generally remains identical.It is embodied as
In re-execute obtain the current status information of photovoltaic electrical network after can not also be judged, such as directly
Re-execute above-mentioned steps, until calculate needing the nodes opened to be 0 or be negative.
The present invention passes through to judge all nodes in photovoltaic electrical network according to intensity of illumination in current status information
Whether output sum is more than the desired value in described control instruction；If all nodes in photovoltaic electrical network
Output sum be more than described control instruction in desired value, then according to each node in photovoltaic electrical network
Output and described control instruction in desired value calculate obtain need open node quantity；Sentence
Whether the quantity of node being in opening in disconnected current status information is more than the node needing unlatching
Quantity；If the quantity being in the node of opening in current status information is more than the section needing to open
The quantity of point, then obtain be in the node of opening can dormancy node quantity；From being in unlatching
Add up the longest node of grid-connected time described in the node of state to start, dormancy correspondence can dormancy quantity
Node；If the quantity being in the node of opening in current status information is less than the section needing to open
The quantity of point, then obtain the quantity of the node needing to open in node in a dormant state；From being in dormancy
Add up the shortest node of grid-connected time described in the node of state to start, open the quantity that correspondence need to be opened
Node.By the way, the present invention first judges whether photovoltaic electrical network can enter park mode, if
Judged result is to enter park mode, then accumulative grid-connected time of each node according to statistics and currently
The nodes opened in state are accordingly turned on or off the node of respective amount, and power distribution is reasonable.This
Invention can control photovoltaic electrical network to enter intelligent dormancy, on the premise of meeting generating target so that each
Node adds up the grid-connected time and keeps in balance, thus controlling the loss situation of each node to keep in balance.
These are only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every
The equivalent structure made using description of the invention and accompanying drawing content or equivalent flow conversion, or directly or
Connect and be used in other related technical fields, be included within the scope of the present invention.
Claims (12)
1. a kind of photovoltaic electric network control method is it is characterised in that the method comprising the steps of：
Obtain the control instruction of photovoltaic electrical network；
Obtain the current status information of photovoltaic electrical network；
Photovoltaic electric is obtained according to described control instruction, current status information and default regulation policy calculation
The target instruction target word of each node in net；
The corresponding output adjusting each node of target instruction target word according to each node.
2. the method for claim 1 is it is characterised in that the described control according to photovoltaic electrical network refers to
Make, current status information and default regulation policy calculation obtain the target of each node in photovoltaic electrical network
The step of instruction includes：
Calculate the mesh obtaining each node output in photovoltaic electrical network according to the control command in photovoltaic electrical network
Scale value；
Default regulation according to the desired value of each node output in photovoltaic electrical network and each node corresponding
Strategy obtains the target instruction target word of each node corresponding, and wherein, described target instruction target word includes active power target
Instruction, reactive power target instruction target word and/or power factor (PF) target instruction target word.
3. the method for claim 1 is it is characterised in that the described control according to photovoltaic electrical network refers to
Make, current status information and default regulation policy calculation obtain the target of each node in photovoltaic electrical network
The step of instruction also includes：
According to intensity of illumination in current status information judge all nodes in photovoltaic electrical network output it
Whether more than the desired value in described control instruction；
If the output sum of all nodes is more than the target in described control instruction in photovoltaic electrical network
Value, then calculate according to the desired value in the output of each node and described control instruction in photovoltaic electrical network
Obtain the quantity of the node needing to open；
Judge what whether the quantity being in the node of opening in current status information opened more than needs
The quantity of node；
If the quantity being in the node of opening in current status information is more than the node needing to open
Quantity, then obtain be in the node of opening can dormancy node quantity；
The step bag of the output of the described target instruction target word according to each node each node of corresponding regulation
Include：
From the beginning of adding up the longest node of grid-connected time from the node being in opening, dormancy correspondence can be stopped
The node of the quantity slept.
4. method as claimed in claim 3 is it is characterised in that judge to be in current status information
Whether the quantity of the node of opening also includes more than after needing the step of the quantity of node opened：
If the quantity being in the node of opening in current status information is less than the node needing to open
Quantity, then obtain need in node in a dormant state open node quantity；
The step of the output of the described target instruction target word according to each node each node of corresponding regulation is also wrapped
Include：
From the beginning of adding up the shortest node of grid-connected time from node in a dormant state, open correspondence and need to open
The node of the quantity opening.
5. method as claimed in claim 3 it is characterised in that described from node in a dormant state
In add up the longest node of grid-connected time and start, the step of the node of the corresponding described quantity of dormancy includes：
Be separated by preset time add up from the node being in opening the longest node of grid-connected time start by
The node of the corresponding described quantity of individual dormancy.
6. method as claimed in claim 4 is it is characterised in that methods described also includes：
It is separated by described preset time and re-execute the step obtaining the current status information of photovoltaic electrical network.
7. a kind of photovoltaic power grid control device is it is characterised in that described device includes：
First acquisition module, for obtaining the control instruction of photovoltaic electrical network；
Second acquisition module, the status information current for obtaining photovoltaic electrical network；
Computing module, for according to described control instruction, current status information and default regulation strategy
Calculate the target instruction target word obtaining each node in photovoltaic electrical network；
Adjustment module, for the corresponding output adjusting each node of target instruction target word according to each node.
8. device as claimed in claim 7 is it is characterised in that described computing module includes：
First computing unit, obtains in photovoltaic electrical network respectively for being calculated according to the control command in photovoltaic electrical network
The desired value of individual node output；
First obtains unit, for according to the desired value of each node output and correspondence in photovoltaic electrical network
The default regulation strategy of each node obtains the target instruction target word of each node corresponding, and wherein, described target refers to
Order includes active power target instruction, reactive power target instruction target word and/or power factor (PF) target instruction target word.
9. device as claimed in claim 7 is it is characterised in that described computing module also includes：
First judging unit, for judging institute in photovoltaic electrical network according to intensity of illumination in current status information
Whether the output sum having node is more than the desired value in described control instruction；
Second computing unit, if for all nodes in photovoltaic electrical network output sum be more than described
Desired value in control instruction, then refer to according to the output of each node in photovoltaic electrical network and described control
Desired value in order calculates the quantity obtaining the node needing to open；
Second judging unit, for judging the quantity of the node being in opening in current status information
The quantity of the node whether opened more than needs；
Second obtaining unit, if the quantity of the node for being in opening in current status information
More than the quantity needing the node opened, then obtain be in the node of opening can dormancy node
Quantity；
Described adjustment module is additionally operable to the node the longest of accumulative grid-connected time from the node being in opening
Start, dormancy correspondence can dormancy quantity node.
10. device as claimed in claim 9 is it is characterised in that described computing module also includes：
3rd obtaining unit, if the quantity of the node for being in opening in current status information
Less than the quantity needing the node opened, then obtain the node needing to open in node in a dormant state
Quantity；
Described adjustment module is additionally operable to the node the shortest of accumulative grid-connected time from node in a dormant state
Start, open the node of the quantity that correspondence need to be opened.
11. devices as claimed in claim 9 are it is characterised in that described adjustment module is additionally operable to be separated by
Preset time adds up the longest node of grid-connected time from the node being in opening and starts dormancy pair one by one
Answer the node of described quantity.
12. devices as claimed in claim 11 are it is characterised in that be separated by described in described preset time
Two acquisition modules regain the current status information of photovoltaic electrical network.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510530981.5A CN106487040A (en) | 2015-08-26 | 2015-08-26 | Photovoltaic electric network control method and device |
| PCT/CN2016/077744 WO2016177208A1 (en) | 2015-08-26 | 2016-03-29 | Photovoltaic power grid control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510530981.5A CN106487040A (en) | 2015-08-26 | 2015-08-26 | Photovoltaic electric network control method and device |
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| CN106487040A true CN106487040A (en) | 2017-03-08 |
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|---|---|---|---|
| CN201510530981.5A Withdrawn CN106487040A (en) | 2015-08-26 | 2015-08-26 | Photovoltaic electric network control method and device |
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| CN (1) | CN106487040A (en) |
| WO (1) | WO2016177208A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107154647A (en) * | 2017-06-08 | 2017-09-12 | 阳光电源股份有限公司 | The power deratng method and controller of a kind of photovoltaic generating system |
| CN108829071A (en) * | 2018-08-09 | 2018-11-16 | 国家能源投资集团有限责任公司 | The control method and control system of photovoltaic system |
| CN111835037A (en) * | 2020-08-11 | 2020-10-27 | 中国人民解放军国防科技大学 | Power supply scheduling method and device based on distributed power generation and storage medium |
| CN112421677A (en) * | 2020-11-16 | 2021-02-26 | 国网冀北电力有限公司承德供电公司 | Distributed photovoltaic ordered recovery grid-connected control system |
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| CN112260313B (en) * | 2020-10-13 | 2023-09-01 | 国网冀北电力有限公司承德供电公司 | Distributed photovoltaic system and control terminal thereof |
| CN113708403A (en) * | 2021-08-17 | 2021-11-26 | 苏州罗约科技有限公司 | Converter grid-connected control method, system, server and storage medium |
| CN114079294A (en) * | 2021-11-18 | 2022-02-22 | 许继集团有限公司 | Photovoltaic power station centralized control method and system and electronic equipment |
| CN114968570B (en) * | 2022-05-20 | 2024-03-26 | 广东电网有限责任公司 | Real-time computing system applied to digital power grid and working method thereof |
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| WO2016177208A1 (en) | 2016-11-10 |
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Application publication date: 20170308 |