CN110247405A - A kind of Reactive Power Dispatch control method, system and data processing module - Google Patents
A kind of Reactive Power Dispatch control method, system and data processing module Download PDFInfo
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- CN110247405A CN110247405A CN201910650216.5A CN201910650216A CN110247405A CN 110247405 A CN110247405 A CN 110247405A CN 201910650216 A CN201910650216 A CN 201910650216A CN 110247405 A CN110247405 A CN 110247405A
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- 230000004913 activation Effects 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 7
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Classifications
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- H02J3/383—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The present invention provides a kind of Reactive Power Dispatch control methods, system and data processing module, detecting system in plant controller, there are in the case where reactive power oscillation phenomenon, increase the process that the numerical value in the idle control instruction that data processing module generates plant controller carries out the disposal of gentle filter, slow down the variation tendency of numerical value in idle control instruction received by gird-connected inverter, it avoids occurring due to the gird-connected inverter oscillatory occurences that numerical value jump occurs in idle control instruction, again since plant controller is by comparing the Reactive Power Dispatch demand and grid entry point reactive power feedback quantity of power grid, it generates idle control instruction and carries out Reactance Closed Loop control, Reactance Closed Loop control can eliminate the error between the numerical value in the idle control instruction that the numerical value in the idle control instruction that plant controller issues and gird-connected inverter receive, it improves The precision of System Reactive Power scheduling controlling.
Description
Technical field
The present invention relates to technical field of photovoltaic power generation, more particularly to a kind of Reactive Power Dispatch control method, system and number
According to processing module.
Background technique
With the development of photovoltaic power generation technology, the newly-increased installation amount of photovoltaic is increasing, the photovoltaic power generation quantity being connected to the grid
Increasing, the response of the characteristics such as Utilities Electric Co.'s, frequency active and reactive to photovoltaic plant requires increasingly harsh.
Plant controller (Power Program in terms of Reactive Power Dispatch, in current most of photovoltaic plant control systems
Counter, PPC) responsive electricity grid Reactive Power Dispatch demand, by comparing Reactive Power Dispatch demand and grid entry point (Point of
Common Coupling, PCC) reactive power feedback quantity, idle control instruction is exported, then by broadcasting idle control instruction
Mode, each gird-connected inverter controlled in array export specified reactive power in such a way that Reactance Closed Loop controls, thus
Reach the requirement of responsive electricity grid Reactive Power Dispatch.
Currently, there are the Reactive-power control modes of plurality of optional for photovoltaic plant control system, and still, above-mentioned Reactive Power Dispatch control
Method is only applicable to QT (idle ratio) Reactive-power control mode, the Reactive Power Dispatch control being unable to satisfy under other Reactive-power control modes
Accuracy requirement.Therefore, needing one kind at present can adapt in various Reactive-power control modes and meets Reactive Power Dispatch control precision need
The Reactive Power Dispatch control method asked.
Summary of the invention
In view of this, being adapted to various Reactive-power control moulds the present invention provides a kind of Reactive Power Dispatch control method and system
Formula improves the precision of System Reactive Power scheduling controlling.
In order to achieve the above-mentioned object of the invention, specific technical solution provided by the invention is as follows:
A kind of Reactive Power Dispatch control method, comprising:
In the case where the idle control instruction for monitoring that plant controller is sent is in second grade transitional states, into activation
State；
The numerical value in idle control instruction sent to the plant controller carries out the disposal of gentle filter；
By treated, idle control instruction broadcasts the gird-connected inverter into photovoltaic array.
Optionally, the method also includes:
The number of the idle control instruction numerical value change sent in predetermined period to the plant controller is monitored；
When the number for monitoring idle control instruction numerical value change is more than preset value, determine that the plant controller is sent
Idle control instruction be in the second grade transitional states.
Optionally, the method also includes:
The median for the numerical value in all idle control instructions that plant controller described in the predetermined period is sent
It is determined as instruction bounce point；
The idle control instruction number sent according to the plant controller in described instruction bounce point and the predetermined period
It is worth the number of variation, setting instruction filter range.
Optionally, described according to the idle of plant controller transmission described in described instruction bounce point and the predetermined period
The number of control instruction numerical value change, setting instruction filter range, comprising:
The type for the idle control instruction that the plant controller is sent is identified, determines Reactive-power control mode；
Filter range factor is determined according to the Reactive-power control mode；
Center by described instruction bounce point as described instruction filter range, and according to the electricity in the predetermined period
The number and the filter range factor for the idle control instruction numerical value change that station control is sent calculate described instruction and filter model
It encloses.
Optionally, the numerical value in the idle control instruction sent to the plant controller carries out at smothing filtering
Reason, comprising:
It is right when the numerical value in the idle control instruction that the plant controller is sent is in described instruction filter range
The numerical value in idle control instruction that the plant controller is sent carries out the disposal of gentle filter, and making that treated, idle control refers to
The error between the numerical value in the idle control instruction before numerical value and processing in order is in default accuracy rating.
Optionally, the method also includes:
In the case where being in unactivated state, the idle control instruction that the plant controller is sent is broadcasted to photovoltaic
Gird-connected inverter in array.
A kind of data processing module, comprising:
State activation unit, for monitoring that the idle control instruction that plant controller is sent be in second grade transitional states
In the case where, into state of activation；
Filter processing unit, the numerical value in idle control instruction for sending to the plant controller are smoothly filtered
Wave processing；
Command broadcast unit, for idle control instruction to broadcast the gird-connected inverter into photovoltaic array by treated.
Optionally, the data processing module further include:
Condition Monitoring Unit, for becoming in predetermined period to the idle control instruction numerical value that the plant controller is sent
The number of change is monitored, and when the number for monitoring idle control instruction numerical value change is more than preset value, determines the power station
The idle control instruction that controller is sent is in second grade transitional states.
Optionally, the data processing module further includes filter range setting unit；
The filter range setting unit includes:
Instruction bounce point determines subelement, all idle for sending plant controller described in the predetermined period
The median of numerical value in control instruction is determined as instruction bounce point；
Subelement is arranged in filter range, for according to the Control of Power Plant in described instruction bounce point and the predetermined period
The number for the idle control instruction numerical value change that device is sent, setting instruction filter range.
Optionally, subelement is arranged in the filter range, specifically for the idle control sent to the plant controller
The type of instruction is identified, determines Reactive-power control mode；Filter range factor is determined according to the Reactive-power control mode；By institute
Center of the instruction bounce point as described instruction filter range is stated, and is sent according to plant controller described in the predetermined period
Idle control instruction numerical value change number and the filter range factor, calculate described instruction filter range.
Optionally, the filter processing unit, specifically for when in the idle control instruction that the plant controller is sent
Numerical value when being in described instruction filter range, the numerical value in idle control instruction sent to the plant controller carries out
The disposal of gentle filter, between the numerical value in the numerical value in the idle control instruction that makes that treated and the idle control instruction before processing
Error in default accuracy rating.
Optionally, described instruction radio unit is also used in unactivated state, by the Control of Power Plant
The idle control instruction that device is sent broadcasts the gird-connected inverter into photovoltaic array.
A kind of Reactive Power Dispatch control system, including plant controller, data processing module and gird-connected inverter；
The plant controller, for by comparing power grid Reactive Power Dispatch demand and grid entry point reactive power feedback quantity,
Idle control instruction is generated, and the idle control instruction of generation is sent to the data processing module；
The data processing module is used to execute the Reactive Power Dispatch control method as described in any one of above-mentioned；
The gird-connected inverter for receiving the idle control instruction of the data processing module broadcast, and is exported and is connect
The corresponding reactive power of idle control instruction received.
Compared with the existing technology, beneficial effects of the present invention are as follows:
Reactive Power Dispatch control method disclosed by the invention, detecting system in plant controller, there are reactive power oscillation phenomenons
In the case of, the numerical value increased in the idle control instruction that data processing module generates plant controller carries out at smothing filtering
The process of reason slows down the variation tendency of numerical value in idle control instruction received by gird-connected inverter, avoid occur due to
The gird-connected inverter oscillatory occurences that numerical value jump occurs in idle control instruction, and since plant controller is by comparing power grid
Reactive Power Dispatch demand and grid entry point reactive power feedback quantity generate idle control instruction and carry out Reactance Closed Loop control, Reactance Closed Loop
Control can eliminate the idle control that the numerical value in the idle control instruction that plant controller issues is received with gird-connected inverter
The error between numerical value in instruction, improves the precision of System Reactive Power scheduling controlling.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow diagram of Reactive Power Dispatch control method disclosed by the embodiments of the present invention；
Fig. 2 is a kind of flow diagram of setting method for instructing filter range disclosed by the embodiments of the present invention；
Fig. 3 is the flow diagram of another Reactive Power Dispatch control method disclosed by the embodiments of the present invention；
Fig. 4 is a kind of structural schematic diagram of data processing module disclosed by the embodiments of the present invention；
Fig. 5 is a kind of structural schematic diagram of Reactive Power Dispatch control system disclosed by the embodiments of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Inventor has found that existing Reactive Power Dispatch control method is only applicable to QT (idle ratio) Reactive-power control
Mode, the numerical value in idle control instruction is reactive power changing value, is only influenced by electric network reactive-load dispatching requirement, is seldom gone out
The phenomenon that numerical value in existing idle control instruction jumps.If PPC needs gird-connected inverter according to PF (power factor), Qu (electricity
Net voltage), the Reactive-power controls mode response such as Qp (active power) its Reactive Power Dispatch, the numerical value in idle control instruction is not simple
Reactive power changing value, but network voltage, power factor or active power, and network voltage, power factor, active power
Numerical value in idle control instruction can be caused frequently to change with the factors dynamic change such as network voltage, electric network impedance, intensity of illumination,
Network voltage, power factor or active power, which frequently change, will lead to gird-connected inverter the reactive power value that exports is needed to jump
Become, causes gird-connected inverter to vibrate, prevent gird-connected inverter from accurately exporting specified reactive power, reduce Reactive Power Dispatch control
The precision of system.
In order to solve the above-mentioned technical problem, present embodiment discloses a kind of Reactive Power Dispatch control methods, are applied to idle tune
The data processing module in control system is spent, which can be set in plant controller, also can be set
In gird-connected inverter, an independent module being also used as in Reactive Power Dispatch control system.Referring to Fig. 1, the present embodiment
Disclosed Reactive Power Dispatch control method specifically includes the following steps:
S101: in the case where the idle control instruction for monitoring that plant controller is sent is in second grade transitional states, into
Enter state of activation；
Data processing module is monitored the idle control instruction that plant controller is sent, specifically, in predetermined period
The interior number of idle control instruction numerical value change sent to plant controller is monitored, when monitoring idle control instruction number
When the number of value variation is more than preset value, determines that the idle control instruction that plant controller is sent is in second grade transitional states, be
There are idle shake risks for system.
Wherein, predetermined period can be 10~20s, can be set according to actual needs.
S102: the numerical value in idle control instruction sent to the plant controller carries out the disposal of gentle filter；
Before the numerical value in the idle control instruction for sending plant controller carries out the disposal of gentle filter, need to be arranged
Instruct filter range.
Specifically, referring to Fig. 2, setting instruction filter range method the following steps are included:
S201: the median for the numerical value in all idle control instructions that plant controller in predetermined period is sent determines
For instruction bounce point；
It is understood that idle control instruction is instructing in the case that idle control instruction is in second grade transitional states
Bounce point is nearby beated back and forth.
S202: according to the idle control instruction numerical value change for instructing bounce point to send with plant controller in predetermined period
Number, setting instruction filter range.
Firstly, identifying to the type for the idle control instruction that plant controller is sent, Reactive-power control mode is determined；Its
In, Reactive-power control mode includes the Reactive-power controls mode such as QT, PF, Qu, Qp, idle control instruction under different Reactive-power control modes
Type is different, if the type of idle control instruction under QT Reactive-power control mode is that QT is instructed, without power control under PF Reactive-power control mode
The type of instruction is made as PF instruction.
Then, filter range factor is determined according to the Reactive-power control mode, the corresponding filtering of different Reactive-power control models
Range factor is different.
Finally, the center by described instruction bounce point as described instruction filter range, and according in the predetermined period
The number and the filter range factor for the idle control instruction numerical value change that the plant controller is sent calculate described instruction
Filter range, wherein the number for the idle control instruction numerical value change that the plant controller is sent in predetermined period is bigger, refers to
Enable filter range bigger, conversely, instruction filter range is smaller.
It is right when the numerical value in the idle control instruction that the plant controller is sent is in described instruction filter range
The numerical value in idle control instruction that the plant controller is sent, which carries out the disposal of gentle filter, to be made that treated idle control refers to
The error between the numerical value in the idle control instruction before numerical value and processing in order slows down no power control in default accuracy rating
The variation tendency of numerical value in system instruction.
S103: by treated, idle control instruction broadcasts the gird-connected inverter into photovoltaic array.
It should be noted that data processing module is in unactivated state, works as prison after the initialization of Reactive Power Dispatch control system
Measure plant controller transmission idle control instruction be in second grade transitional states in the case where, into state of activation.Specifically,
Referring to Fig. 3, Reactive Power Dispatch control method shown in Fig. 3 specifically includes the following steps:
S301: after the initialization of Reactive Power Dispatch control system, data processing module is in unactivated state；
S302: whether data processing module is active；
If being in unactivated state, S303: the idle control instruction that data processing module sends plant controller is executed
Broadcast the gird-connected inverter into photovoltaic array；
If being active, S304 is executed: in the idle control instruction that data processing module sends plant controller
Numerical value carry out the disposal of gentle filter；
S305: by treated, idle control instruction broadcasts the gird-connected inverter into photovoltaic array to data processing module.
After the initialization of Reactive Power Dispatch control system, data processing module is in unactivated state, avoids referring in idle control
It enables and the disposal of gentle filter is carried out to the numerical value in idle control instruction in the case where being not in second grade transitional states, cause grid-connected inverse
Becoming between the idle control instruction that the device idle control instruction received and plant controller are sent has error.
Once data processing module activate, then in the operational process of entire gird-connected inverter data processing module all in swash
State living, unless gird-connected inverter power down, data processing module is just switched to dormant state, i.e. un-activation shape from state of activation
State.
It should be noted that in order to improve the flexibility of data processing module, data processing module can also be forced to select
State of activation forces selection dormant state.
By taking PF Reactive-power control mode as an example, steps are as follows for the realization of Reactive Power Dispatch control method:
1. plant controller is using PF mode by the broadcast idle control instruction of PF to the gird-connected inverter in photovoltaic array
Reactive Power Dispatch is carried out, data processing module is unactivated state, is supervised in real time to the PF reactive command of plant controller broadcast
It surveys.
2. if monitor that PF instruction is beated back and forth near a certain PF value in predetermined period, and instructing number is more than n
Secondary, illustrating system, there are idle jitter phenomenon (PF fluctuations), then data processing module enters state of activation, and the PF value is arranged
For instruction bounce point.
3. the data processing module under state of activation setting instruction filter range, instruction centered on instructing bounce point PF value
The width of filter range determines that n is bigger by number n in step 2, and filter range is bigger, conversely, filter range is smaller.
4. if data processing module detects that the idle control instruction of PF that PPC is issued is in filter range, to PF without
Function control instruction carries out the disposal of gentle filter, slows down instruction variation tendency, improves output order resolution ratio.
5. data processing module is active, gird-connected inverter keeps open loop mould in the idle regulator control system in power station
Formula, at this point, existing between the idle control instruction of PF and the practical idle control instruction of PF issued of PPC of gird-connected inverter response inclined
Difference is adjusted in real time by closed-loop system feedback error since PPC grasps power station Reactance Closed Loop regulation power and is handed down to data processing mould
Control instruction that the PF of block is idle inhibits the PF jitter phenomenon of bounce point, so that System Reactive Power scheduling controlling meets required precision.
Reactive Power Dispatch control method disclosed in the present embodiment, detecting system in plant controller, there are reactive power oscillation phenomenons
In the case where, the numerical value increased in the idle control instruction that data processing module generates plant controller carries out smothing filtering
The process of processing slows down the variation tendency of numerical value in idle control instruction received by gird-connected inverter, avoid occur by
The gird-connected inverter oscillatory occurences that numerical value jump occurs in idle control instruction.Again since plant controller is by comparing power grid
Reactive Power Dispatch demand and grid entry point reactive power feedback quantity, generate idle control instruction and carry out Reactance Closed Loop control, it is idle to close
Ring control can eliminate numerical value in the idle control instruction that plant controller issues and gird-connected inverter receives without power control
The error between numerical value in system instruction, improves the precision of System Reactive Power scheduling controlling.
Disclosed a kind of Reactive Power Dispatch control method based on the above embodiment, the present embodiment is corresponding to be disclosed at a kind of data
Module is managed, referring to Fig. 4, data processing module includes:
State activation unit 401, for monitor plant controller send idle control instruction be in the second grade jump
In the case where state, into state of activation；
Filter processing unit 402, the numerical value in idle control instruction for sending to the plant controller carry out flat
Sliding filtering processing；
Command broadcast unit 403, for idle control instruction to broadcast the parallel network reverse into photovoltaic array by treated
Device.
Optionally, the data processing module further include:
Condition Monitoring Unit, for becoming in predetermined period to the idle control instruction numerical value that the plant controller is sent
The number of change is monitored, and when the number for monitoring idle control instruction numerical value change is more than preset value, determines the power station
The idle control instruction that controller is sent is in second grade transitional states.
Optionally, the data processing module further includes filter range setting unit；
The filter range setting unit includes:
Instruction bounce point determines subelement, all idle for sending plant controller described in the predetermined period
The median of numerical value in control instruction is determined as instruction bounce point；
Subelement is arranged in filter range, for according to the Control of Power Plant in described instruction bounce point and the predetermined period
The number for the idle control instruction numerical value change that device is sent, setting instruction filter range.
Optionally, subelement is arranged in the filter range, specifically for the idle control sent to the plant controller
The type of instruction is identified, determines Reactive-power control mode；Filter range factor is determined according to the Reactive-power control mode；By institute
Center of the instruction bounce point as described instruction filter range is stated, and is sent according to plant controller described in the predetermined period
Idle control instruction numerical value change number and the filter range factor, calculate described instruction filter range.
Optionally, the filter processing unit 402, specifically for the idle control instruction sent when the plant controller
In numerical value when being in described instruction filter range, the numerical value in idle control instruction that the plant controller is sent into
Row the disposal of gentle filter, numerical value in the numerical value in the idle control instruction that makes that treated and the idle control instruction before processing it
Between error in default accuracy rating.
Optionally, described instruction radio unit 403 is also used in unactivated state, by the power station
The idle control instruction that controller is sent broadcasts the gird-connected inverter into photovoltaic array.
Disclosed data processing module based on the above embodiment, referring to Fig. 5, the present embodiment it is corresponding disclose it is a kind of idle
Dispatching Control System, including plant controller, data processing module and gird-connected inverter；
The plant controller, for by comparing power grid Reactive Power Dispatch demand and grid entry point reactive power feedback quantity,
Idle control instruction is generated, and the idle control instruction of generation is sent to the data processing module；
The data processing module is used for following Reactive Power Dispatch control method:
In the case where the idle control instruction for monitoring that plant controller is sent is in second grade transitional states, into activation
State；
The numerical value in idle control instruction sent to the plant controller carries out the disposal of gentle filter；
By treated, idle control instruction broadcasts the gird-connected inverter into photovoltaic array.
Further, the method also includes:
The number of the idle control instruction numerical value change sent in predetermined period to the plant controller is monitored；
When the number for monitoring idle control instruction numerical value change is more than preset value, determine that the plant controller is sent
Idle control instruction be in the second grade transitional states.
Further, the method also includes:
The median for the numerical value in all idle control instructions that plant controller described in the predetermined period is sent
It is determined as instruction bounce point；
The idle control instruction number sent according to the plant controller in described instruction bounce point and the predetermined period
It is worth the number of variation, setting instruction filter range.
Further, described according to the idle of plant controller transmission described in described instruction bounce point and the predetermined period
The number of control instruction numerical value change, setting instruction filter range, comprising:
The type for the idle control instruction that the plant controller is sent is identified, determines Reactive-power control mode；
Filter range factor is determined according to the Reactive-power control mode；
Center by described instruction bounce point as described instruction filter range, and according to the electricity in the predetermined period
The number and the filter range factor for the idle control instruction numerical value change that station control is sent calculate described instruction and filter model
It encloses.
Further, the numerical value in the idle control instruction sent to the plant controller carries out at smothing filtering
Reason, comprising:
It is right when the numerical value in the idle control instruction that the plant controller is sent is in described instruction filter range
The numerical value in idle control instruction that the plant controller is sent carries out the disposal of gentle filter, and making that treated, idle control refers to
The error between the numerical value in the idle control instruction before numerical value and processing in order is in default accuracy rating.
Further, the method also includes:
In the case where being in unactivated state, the idle control instruction that the plant controller is sent is broadcasted to photovoltaic
Gird-connected inverter in array.
The gird-connected inverter for receiving the idle control instruction of the data processing module broadcast, and is exported and is connect
The corresponding reactive power of idle control instruction received.
Reactive Power Dispatch control system disclosed in the present embodiment, increases data processing module, detects in plant controller
There are the numerical value in idle control instruction in the case where reactive power oscillation phenomenon, generated to plant controller smoothly to be filtered for system
Wave processing, slows down the variation tendency of numerical value in idle control instruction received by gird-connected inverter, avoids occurring due to nothing
The gird-connected inverter oscillatory occurences that numerical value jump occurs in function control instruction.
Meanwhile plant controller is generated by comparing the Reactive Power Dispatch demand and grid entry point reactive power feedback quantity of power grid
Idle control instruction carries out Reactance Closed Loop control, and Reactance Closed Loop control can eliminate the idle control instruction that plant controller issues
In the idle control instruction that receives of numerical value and gird-connected inverter in numerical value between error, improve System Reactive Power scheduling
The precision of control.
Reactive Power Dispatch control system disclosed in the present embodiment, gird-connected inverter are only used as the execution master of idle control instruction
Body keeps reactive response state, and idle precision controlling transfers to the same regulation of plant controller, avoids system there are multiple closed loops,
The problem of conflicting with each other, and then causing the wild effects such as system oscillation.
It should be noted that data processing module can be set in plant controller, also can be set in parallel network reverse
In device, an independent module being also used as in Reactive Power Dispatch control system does not influence the normal control of gird-connected inverter.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of Reactive Power Dispatch control method characterized by comprising
In the case where the idle control instruction for monitoring that plant controller is sent is in second grade transitional states, into activation shape
State；
The numerical value in idle control instruction sent to the plant controller carries out the disposal of gentle filter；
By treated, idle control instruction broadcasts the gird-connected inverter into photovoltaic array.
2. the method according to claim 1, wherein the method also includes:
The number of the idle control instruction numerical value change sent in predetermined period to the plant controller is monitored；
When the number for monitoring idle control instruction numerical value change is more than preset value, the nothing that the plant controller is sent is determined
Function control instruction is in second grade transitional states.
3. according to the method described in claim 2, it is characterized in that, the method also includes:
The median for the numerical value in all idle control instructions that plant controller described in the predetermined period is sent determines
For instruction bounce point；
The idle control instruction numerical value sent according to the plant controller in described instruction bounce point and the predetermined period becomes
The number of change, setting instruction filter range.
4. according to the method described in claim 3, it is characterized in that, described according to described instruction bounce point and the predetermined period
The number for the idle control instruction numerical value change that the interior plant controller is sent, setting instruction filter range, comprising:
The type for the idle control instruction that the plant controller is sent is identified, determines Reactive-power control mode；
Filter range factor is determined according to the Reactive-power control mode；
Center by described instruction bounce point as described instruction filter range, and controlled according to power station described in the predetermined period
The number and the filter range factor for the idle control instruction numerical value change that device processed is sent calculate described instruction filter range.
5. according to the method described in claim 3, it is characterized in that, the idle control sent to the plant controller refers to
Numerical value in order carries out the disposal of gentle filter, comprising:
When the numerical value in the idle control instruction that the plant controller is sent is in described instruction filter range, to described
The numerical value in idle control instruction that plant controller is sent carries out the disposal of gentle filter, in the idle control instruction that makes that treated
Numerical value and processing before idle control instruction in numerical value between error in default accuracy rating.
6. method according to claim 1, which is characterized in that the method also includes:
In the case where being in unactivated state, the idle control instruction that the plant controller is sent is broadcasted to photovoltaic array
In gird-connected inverter.
7. a kind of data processing module characterized by comprising
State activation unit, for monitoring that idle control instruction that plant controller is sent be in the feelings of second grade transitional states
Under condition, into state of activation；
Filter processing unit, the numerical value in the idle control instruction for sending to the plant controller carry out at smothing filtering
Reason；
Command broadcast unit, for idle control instruction to broadcast the gird-connected inverter into photovoltaic array by treated.
8. data processing module according to claim 7, which is characterized in that the data processing module further include:
Condition Monitoring Unit, the idle control instruction numerical value change for being sent in predetermined period to the plant controller
Number is monitored, and when the number for monitoring idle control instruction numerical value change is more than preset value, determines the Control of Power Plant
The idle control instruction that device is sent is in second grade transitional states.
9. data processing module according to claim 7, which is characterized in that described instruction radio unit is also used to locating
In the case where unactivated state, the idle control instruction that the plant controller is sent is broadcasted grid-connected into photovoltaic array
Inverter.
10. a kind of Reactive Power Dispatch control system, which is characterized in that including plant controller, data processing module and parallel network reverse
Device；
The plant controller is generated for the Reactive Power Dispatch demand and grid entry point reactive power feedback quantity by comparing power grid
Idle control instruction, and the idle control instruction of generation is sent to the data processing module；
The data processing module is used to execute the Reactive Power Dispatch control method as described in any one of claim 1~6；
The gird-connected inverter for receiving the idle control instruction of the data processing module broadcast, and is exported and is received
The corresponding reactive power of idle control instruction.
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