CN109524969A - A kind of control method of SVG type dynamic reactive compensation device multi-machine parallel connection - Google Patents
A kind of control method of SVG type dynamic reactive compensation device multi-machine parallel connection Download PDFInfo
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- CN109524969A CN109524969A CN201811454397.6A CN201811454397A CN109524969A CN 109524969 A CN109524969 A CN 109524969A CN 201811454397 A CN201811454397 A CN 201811454397A CN 109524969 A CN109524969 A CN 109524969A
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- 238000011217 control strategy Methods 0.000 abstract description 2
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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- H02J13/0006—
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention relates to dynamic passive compensations, more particularly to a kind of control method of SVG type dynamic reactive compensation device multi-machine parallel connection, by AVC communication interface, each SVG communication interface is connected on no distribution of work host communication interface or serial server, carry out communication networking, station number is arranged by host computer in no distribution of work host, respectively with AVC control interface, each SVG device interface carries out communication connection, host computer pre-sets required parametric variable, and data communication is established with each communication interface, read the current voltage of each SVG device, the voltage instruction that current idle power output and AVC are issued；Technical solution provided by the present invention can effectively overcome the defect of the coordinated control of the mostly set equipment of more set SVG type dynamic reactive compensation device coordinated controls, different manufacturers present in prior art string benefit anti-to same compensation point and voltage automatic tracking and compensating, more set one-stop control strategies of SVG type reactive compensation parallel running.
Description
Technical field
The present invention relates to dynamic passive compensations, and in particular to a kind of control of SVG type dynamic reactive compensation device multi-machine parallel connection
Method processed.
Background technique
In recent years, the New Energy Industry based on wind-powered electricity generation and photovoltaic power generation was a dark horse, in order to guarantee that the stabilization of power grids is transported
Row, according to " wind power plant accesses power grid/power system technology regulation " put into effect and " photo-voltaic power generation station accesses electric power network technique regulation "
It is required that needing to meet the dynamic reactive compensation device of design requirement capacity in wind power plant booster stations or photovoltaic plant configuration, with steady
Determine wind power plant or photovoltaic plant exit potential.
As wind power plant and the scale of photovoltaic plant constantly expand, reactive power compensator configuration capacity increases therewith, often
More set SVG type dynamic reactive compensation device parallel running compensation are needed, it is more since target compensation is main transformer high side voltage
Covering dynamic reactive compensation device, simultaneously there is string benefit or oscillatory occurences in automatic running.Currently, some wind power plants or photovoltaic plant can
With the single set high-voltage large-capacity direct screening type reactive power compensator of selection；More set equipment, but every set SVG operational mode can also be used in some
It is not all automatic running pattern, can be combined by using permanent idle manual mode of operation and constant voltage automatic running pattern
Mode is run；Threshold value, the adjustable range of the response speed and setting SVG device adjusting by reducing SVG device also
And setting diverting coefficient, to achieve the effect that anti-string is mended.The area of some accesses AVC control, directly can issue perseverance by AVC
No work value is contributed to each SVG device, directly can also issue constant voltage value to a wherein main equipment, on condition that institute by AVC
Otherwise the more covering devices used can not also solve each equipment from internal master-slave communication has been carried out between same producer and each equipment
Between coordinated control the problem of.
Summary of the invention
(1) the technical issues of solving
For disadvantages mentioned above present in the prior art, the present invention provides a kind of SVG type dynamic reactive compensation device is more
The control method of machine parallel connection can effectively overcome more set SVG type dynamic reactive compensation devices present in the prior art to coordinate control
System, different manufacturers cover more equipment string anti-to same compensation point mend and the coordinated control of voltage automatic tracking and compensating, more set SVG type without
The defect of the function compensation one-stop control strategy of parallel running.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs:
A kind of control method of SVG type dynamic reactive compensation device multi-machine parallel connection, comprising the following steps:
S1, AVC communication interface, each SVG communication interface are connected to no distribution of work host communication interface or serial server
On, carry out communication networking；
S2, station number is arranged by host computer without distribution of work host, is carried out respectively with AVC control interface, each SVG device interface
Communication connection；
S3, host computer pre-set required parametric variable, and establish data communication with each communication interface；
The voltage instruction that S4, the current voltage for reading each SVG device, current idle power output and AVC are issued；
S5, total reactive requirement is calculated by host computer, is then assigned to each SVG device.
Preferably, the no distribution of work host is industrial personal computer or notebook.
Preferably, after the no distribution of work host reception issues voltage instruction, idle point is carried out again by host computer calculating
Match, controls each SVG device power output.
Preferably, the host computer is equipped with LabvieW upper computer software.
Preferably, the host computer is plugged with PCI-1602B serial port expanding module.
Preferably, the host computer establishes data communication according to MODBUS specification point table and each communication interface.
Preferably, the host computer assembles 485 address cards, and the port COM2 of the host computer and 485 in SVG master control lead to
Port connection is interrogated, the port COM3 of the host computer is connect with other SVG device control systems, the port COM4 of the host computer
It is connect with wind power plant AVC control platform, the spare COM port of the host computer is connect with subsequent new SVG device.
(3) beneficial effect
Compared with prior art, the control of a kind of SVG type dynamic reactive compensation device multi-machine parallel connection provided by the present invention
Method can solve different manufacturers SVG and control the automatic synchronization of same compensation point voltage, and need not go deep into different manufacturers SVG
Internal processes, need to only have the MODBUS protocol interface of standard, implement very convenient, while improving idle benefit indirectly
The performance of device is repaid, provides effective guarantee for the development of new energy and the safety of power grid.
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 evident that the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is flow diagram of the present invention；
Fig. 2 is present invention control connection schematic diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
A kind of control method of SVG type dynamic reactive compensation device multi-machine parallel connection, as depicted in figs. 1 and 2, including following step
It is rapid:
S1, AVC communication interface, each SVG communication interface are connected to no distribution of work host communication interface or serial server
On, carry out communication networking；
S2, station number is arranged by host computer without distribution of work host, is carried out respectively with AVC control interface, each SVG device interface
Communication connection；
S3, host computer pre-set required parametric variable, and establish data communication with each communication interface；
The voltage instruction that S4, the current voltage for reading each SVG device, current idle power output and AVC are issued；
S5, total reactive requirement is calculated by host computer, is then assigned to each SVG device.
No distribution of work host is industrial personal computer or notebook.
After no distribution of work host reception issues voltage instruction, no distribution of work is carried out by host computer calculating again, controls each SVG
Device power output.
Host computer is equipped with LabvieW upper computer software.
Host computer is plugged with PCI-1602B serial port expanding module.
Host computer establishes data communication according to MODBUS specification point table and each communication interface.
Host computer assembles 485 address cards, and the port COM2 of host computer is connect with 485 PORT COMs in SVG master control, upper
The port COM3 of machine is connect with other SVG device control systems, and the port COM4 of host computer and wind power plant AVC control platform connect
It connects, the spare COM port of host computer is connect with subsequent new SVG device.
Several parametric variables are mainly introduced in constant voltage instruction:
K value: the idle ratio with voltage (scene can be according to the permanent idle power output change value of SVG and voltage change survey
Out)；
Step value Q0: i.e. SVG instantaneously exports regulated value；
Error correction values U ': the system voltage and AVC that host computer is read show voltage correction value；
Auxiliary parameter, that is, voltage adjusts dead zone U0.
Control algolithm is as follows: upper computer detection current system voltage U_When(what host computer took is four SVG system voltage A phases
Average value, in order to improve flexibility, can also by change error correction values U ' reduce with user backstage display system electricity
Pressure difference), the power output of four SVG at this time is respectively Q1, Q2, Q3, Q4, and host computer, which calculates to adjust, arrives target voltage U_TargetRequired nothing
Function:
Q_It needs=(Q1+Q2+Q3+Q4)+[(U_When+U’)—U_Target] * K,
Then every SVG power output Q_Out=Q_It needs/ n (n is that current SVG runs number of units), SVG carries out output according to step value Q0 and changes
Become, until Shu U_Target—U_WhenIt is no longer adjusted when Shu < U0.
Pay attention to there is minimum idle output setting due to SVG ontology, according to on-the-spot test, the setting value ratio SVG of step-length is minimum
Idle output setting value bigger 30% is advisable.
If every SVG currently has output, example Q1=3；Q2=8；Q3=5；Q4=-4, current system voltage U_When=
220kV, the idle i.e. changeable system of the K=10 (i.e. expression SVG changes 10M) that we are arranged after testing, step value Q0=1
The voltage of 1kV.It is 220kV system for booster stations main transformer high side voltage, if AVC issues target voltage values 222kV, from
220kV changes to 222kV, needs in current total idle upper change (220-222) * K=-20M, we are total idle summation:
Q1+Q2+Q3+Q4+ (- 20), i.e. 3+8+5+ (- 4)+(- 20)=- 8,
System voltage, can be transferred to 222kV, i.e., every output-by the last output -8M in total of so theoretically current 4 SVG
2M。
Because current stepping is 1M, program can go to judge: if the output of 1#SVG is 3M, from 3M to -2M, 1#SVG
It is equivalent to 5M to be changed, this value of 5M is greater than step value certainly, this time can be from so 1#SVG is just changed with step value to make
3M becomes 2M.
Step value is a reference, when need to change it is idle be greater than step value if, SVG is just done every time with step value
Change；Less than step value, just changed with the difference being less than to make.For example 1#SVG is currently -1.2M, then -1.2M becomes
It is equivalent to -2M, 1#SVG and needs to change 0.8M, however 0.8M is less than step value 1M, so just using 0.8M as step value.
A kind of control method of SVG type dynamic reactive compensation device multi-machine parallel connection provided by the present invention can solve difference
Producer SVG controls the automatic synchronization of same compensation point voltage, and need not go deep into the internal processes of different manufacturers SVG, only needs
Have the MODBUS protocol interface of standard, implement very convenient, while improving the performance of reactive power compensator indirectly, is
The development of new energy and the safety of power grid provide effective guarantee.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, can't be such that the essence of corresponding technical solution departs from the spirit and scope of the technical scheme of various embodiments of the present invention.
Claims (7)
1. a kind of control method of SVG type dynamic reactive compensation device multi-machine parallel connection, it is characterised in that: the following steps are included:
S1, AVC communication interface, each SVG communication interface are connected on no distribution of work host communication interface or serial server, into
Row communication networking；
S2, station number is arranged by host computer without distribution of work host, is communicated respectively with AVC control interface, each SVG device interface
Connection；
S3, host computer pre-set required parametric variable, and establish data communication with each communication interface；
The voltage instruction that S4, the current voltage for reading each SVG device, current idle power output and AVC are issued；
S5, total reactive requirement is calculated by host computer, is then assigned to each SVG device.
2. the control method of SVG type dynamic reactive compensation device multi-machine parallel connection according to claim 1, it is characterised in that:
The no distribution of work host is industrial personal computer or notebook.
3. the control method of SVG type dynamic reactive compensation device multi-machine parallel connection according to claim 1, it is characterised in that:
After the no distribution of work host reception issues voltage instruction, no distribution of work is carried out by host computer calculating again, controls each SVG device
Power output.
4. the control method of SVG type dynamic reactive compensation device multi-machine parallel connection according to claim 1, it is characterised in that:
The host computer is equipped with LabvieW upper computer software.
5. the control method of SVG type dynamic reactive compensation device multi-machine parallel connection according to claim 1, it is characterised in that:
The host computer is plugged with PCI-1602B serial port expanding module.
6. the control method of SVG type dynamic reactive compensation device multi-machine parallel connection according to claim 1, it is characterised in that:
The host computer establishes data communication according to MODBUS specification point table and each communication interface.
7. the control method of SVG type dynamic reactive compensation device multi-machine parallel connection according to claim 1, it is characterised in that:
The host computer assembles 485 address cards, and the port COM2 of the host computer is connect with 485 PORT COMs in SVG master control, described
The port COM3 of host computer is connect with other SVG device control systems, and the port COM4 of the host computer and wind power plant AVC are controlled
Platform connection, the spare COM port of the host computer are connect with subsequent new SVG device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601209A (en) * | 2019-09-09 | 2019-12-20 | 华北电力科学研究院有限责任公司 | Method and device for suppressing low-frequency oscillation of voltage of wind power plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601209A (en) * | 2019-09-09 | 2019-12-20 | 华北电力科学研究院有限责任公司 | Method and device for suppressing low-frequency oscillation of voltage of wind power plant |
| CN110601209B (en) * | 2019-09-09 | 2021-05-28 | 华北电力科学研究院有限责任公司 | Method and device for suppressing low-frequency oscillation of voltage of wind power plant |
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