CN107069755B - A kind of micro-capacitance sensor distribution secondary voltage control method based on event trigger mechanism - Google Patents
A kind of micro-capacitance sensor distribution secondary voltage control method based on event trigger mechanism Download PDFInfo
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- CN107069755B CN107069755B CN201710058132.3A CN201710058132A CN107069755B CN 107069755 B CN107069755 B CN 107069755B CN 201710058132 A CN201710058132 A CN 201710058132A CN 107069755 B CN107069755 B CN 107069755B
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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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- 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
- H02J3/50—Controlling the sharing of the out-of-phase component
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The micro-capacitance sensor distribution secondary voltage control method based on event trigger mechanism that the present invention provides a kind of, belongs to intelligent grid control field.Every distributed generator is using self information and can carry out the information of other distributed generators of information exchange with it, build rational event trigger mechanism and corresponding distributed and coordinated control strategy so that the output voltage amplitude of all distributed generators traces into leader.The advantage of the invention is that on the basis of ensureing that control task efficiently accomplishes, the on-demand transmission of information between distributed generator is realized, network communication pressure is reduced, to ensure intelligent grid voltage stabilization.
Description
Technical field
The micro-capacitance sensor distribution secondary voltage control method based on event trigger mechanism that the present invention relates to a kind of belonging to intelligence
Power grid control field.
Background technology
Usually will include distributed electrical to improve new energy permeability and bulk power grid to the carrying capacity of regenerative resource
The small power plant in source accesses bulk power grid in the form of micro-capacitance sensor.When micro-capacitance sensor operates in grid-connect mode, voltage stabilization is by big electricity
Net support, when being switched to islet operation pattern, micro grid control system needs to ensure its voltage synchronous.And in micro-grid system
Coordination control between a variety of different types of distributed generation resources is the key that system operation control.
Mainly there are centerized fusion and two kinds of strategies of distributed AC servo system for the coordination of distributed generator control at present.Collection
Chinese style controls the operating status for requiring central controller to collect all distributed generators in complicated bidirectional communication network
Information, and control instruction is uniformly assigned, it is of high cost, and it is easy to happen Single Point of Faliure so that system reliability reduces；And divide
Cloth control model can manage a large amount of distributed generator, can reach preferable control effect using only neighborhood information,
Of low cost, scalability is strong.
To execute micro-capacitance sensor secondary voltage distributed AC servo system strategy, each distributed generator is usually completed via wireless network
Information exchange.In the construction of the following intelligent grid, more and more distributed generators will occur, and the bandwidth of communication network is
It is limited, thus in practical engineering application usually to each distributed power generation machine information carry out the periodic samplings such as high frequency send with
Reach the requirement that information continuously transmits in design controller, for the more distributed power generation group of planes that individual amount is huge, this mistake
Network communication pressure can be made to increase in the conservative mode of intelligence transmission, and then communication delay and packet loss occur, and eventually led to
The failure of control task seriously affects the stability and security of micro-grid system, still lacks effective solution to problems at present
Scheme.
Invention content
Technical problem solved by the invention is to provide a kind of micro-capacitance sensor secondary voltage based on event trigger mechanism point
Cloth control method designs event trigger mechanism by establishing distributed generator voltage droop control strategy, rebuilds point
Cloth secondary voltage control strategy so that the amplitude tracking of its output voltage to leader maintains micro-grid system voltage stabilization.
Realize that the technical solution of the object of the invention is：
A kind of micro-capacitance sensor distribution secondary voltage control method based on event trigger mechanism, specifically comprises the following steps：
Step 1, systematic parameter is set；
Step 2, reactive power-voltage droop control strategy of i-th of the distributed generator of setting in t moment；
Step 3, the input variable and output variable that setting secondary voltage controls；
Step 4, more distributed generator communication network topologies are described：
Step 5, event trigger policy is designed；
Step 6, secondary voltage control strategy is designed.
As a kind of the further of micro-capacitance sensor distribution secondary voltage control method based on event trigger mechanism of the present invention
Preferred embodiment, in step 1, the systematic parameter of setting includes contained distributed generator number in given micro-capacitance sensor, and every
The reference value of the output voltage amplitude of platform distributed generator.
As a kind of the further of micro-capacitance sensor distribution secondary voltage control method based on event trigger mechanism of the present invention
Preferred embodiment, in step 2, the reactive power-voltage droop control strategy is specially：
vodi(t)=vsi(t)-niQi(t)；
Wherein, vsi(t) be droop control voltage magnitude reference signal, Qi(t) it is the idle of i-th distributed generator
Power, vodi(t) be i-th distributed generator voltage controller voltage magnitude reference signal, niIt is droop control system
Number.
As a kind of the further of micro-capacitance sensor distribution secondary voltage control method based on event trigger mechanism of the present invention
Preferred embodiment, in step 3, input variable are the reference input v of droop control described in step 2si(t), wherein settingThenOutput variable is the output voltage amplitude v of generatorodi(t)。
As a kind of the further of micro-capacitance sensor distribution secondary voltage control method based on event trigger mechanism of the present invention
Preferred embodiment describes more distributed generator communication network topologies in step 4：One communication connection coefficient a of settingijIf i,
I=1,2 ... n and j, j=1,2 ... n presence can interact d shaft voltage information vodi(t) and vodj(t) communication link, then
A is setij=1, on the contrary aij=0, while arranging aii=0；If i-th of distributed power generation function receives vref, then a is seti0=1,
Otherwise ai0=0；
As a kind of the further of micro-capacitance sensor distribution secondary voltage control method based on event trigger mechanism of the present invention
Preferred embodiment carves t at the beginning in steps of 50, all distributed generators is enabled to send the electricity of itself via communication network
Pressure amplitude value, and the initial trigger moment is set and isFor i-th of distributed generator, if about the nearest of its voltage magnitude
One time triggering moment is?Moment, if following trigger conditions：
Meet, wherein
bi(t)=| α xi(t)+βsign(xi(t)) |+γ, α, β and γ are normal number, and sign () indicates sign function,Indicate the
J (j=1,2 ..., n) the last triggering moment about voltage magnitude of a distributed generator before t moment, | Ni|
The neighbours' number for indicating i-th of distributed generator, then mark the moment t to beAnd i-th of distributed generator by its from
The triggering information of the voltage magnitude of bodyIt stores and is sent to other distributed power generations that can be communicated in group
Machine.
As a kind of the further of micro-capacitance sensor distribution secondary voltage control method based on event trigger mechanism of the present invention
Preferred embodiment, in step 6, whenWhen, setting i-th (i=1,2 ..., n) the secondary electricity of a distributed generator
Pressure control strategy be
The present invention has the following technical effects using above technical scheme is compared with the prior art：
1) coordination control strategy of the invention makes the amplitude of the output voltage of n platforms distributed generator in micro-capacitance sensor tend to
Unanimously, the voltage that major network is traced under grid-connect mode, traces into the voltage of leader under off-network pattern, finally realizes micro- electricity
Net voltage stabilization；
2) it is continuously transmitted compared to traditional information and the discrete sending method of periodic sampling, the present invention realizes in micro-capacitance sensor
The on-demand transmission of information between each distributed generator effectively reduces network communication pressure；
3) coordination control strategy global design framework of the invention uses distributed AC servo system pattern, and construction cost is cheap, can
Autgmentability is strong.
Description of the drawings
Fig. 1 is flow chart of the method for the present invention；
Fig. 2 is the physical topology connection figure of group's distributed generator of the present invention；
Fig. 3 is the communication topology connection figure of group's distributed generator of the present invention；
Fig. 4 is group's distributed generator output voltage amplitude situation of change of the present invention；
Fig. 5 is the output voltage amplitude triggered time interval of distributed generator 2 of the present invention；
Fig. 6 is the output voltage amplitude triggered time interval of distributed generator 3 of the present invention；
Specific implementation mode
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
As shown in Figure 1, a kind of distributed two layers of voltage control method of the micro-capacitance sensor based on event trigger mechanism, specifically include
Following steps：Step 1, systematic parameter is set；
Step 2, reactive power-voltage droop control strategy of i-th of the distributed generator of setting in t moment；
Step 3, the input variable and output variable that setting secondary voltage controls；
Step 4, more distributed generator communication network topologies are described：
Step 5, event trigger policy is designed；
Step 6, secondary voltage control strategy is designed.
Concrete principle is as follows：
Systematic parameter is arranged in step 1：Contained distributed generator number is 4 and every point in given micro-capacitance sensor
The reference value 311V of the output voltage amplitude of cloth generator；
It is sagging in reactive power-voltage of t moment that i-th (i=1,2,3,4) a distributed generator is arranged in step 2
Control strategy is：
vodi(t)=vsi(t)-niQi(t)；
Wherein, vsi(t) be droop control voltage magnitude reference signal, Qi(t) it is the idle of i-th distributed generator
Power, vodi(t) be i-th distributed generator voltage controller voltage magnitude reference signal, niIt is droop control system
Number；
Two layers of voltage-controlled input variable and output variable is arranged in step 3, and input variable is that step (2) is described
The reference input v of droop controlsi(t), output variable is the output voltage amplitude v of generatorodi(t)；And it is arrangedThen input variable is：
Describes more distributed generator communication network topologies in step 4：One communication connection coefficient a of settingijIf i (i
=1,2,3,4) d shaft voltage information v can be interacted by existing with j (j=1,2,3,4)odi(t) and vodj(t) communication link, then set
Set aij=1, on the contrary aij=0, while arranging aii=0.If a distributed power generation functions of i-th (i=1,2,3,4) receive vref, then
A is seti0=1, on the contrary ai0=0；Wherein Fig. 2 is the physical topology connection figure of group's distributed generator of the present invention；Fig. 3 is this
Invent the communication topology connection figure of group's distributed generator.
Carves t at the beginning in steps of 50, all distributed generators is enabled to send the voltage of itself via communication network
Amplitude, and the initial trigger moment is set and isFor i-th (i=1,2,3,4) a distributed generator,
If the last triggering moment about its voltage magnitude is?Moment, if following trigger conditions：
Meet, wherein
bi(t)=| α xi(t)+βsign(xi(t)) |+γ, α, β and γ are normal number, and sign () indicates sign function,It indicates
Jth (j=1,2 ..., n) the last triggering moment about voltage magnitude of a distributed generator before t moment, |
Ni| the neighbours' number for indicating i-th of distributed generator then marks the moment t to beAnd i-th of distributed generator by its
The triggering information of the voltage magnitude of itselfIt stores and is sent to other distribution hairs that can be communicated in group
Motor；
Works as in step 6When, setting i-th (i=1,2 ..., n) a distributed generator secondary voltage
Control strategy is
This step need to be performed simultaneously with step 5, to ensure the micro-capacitance sensor distribution secondary voltage based on event trigger mechanism
The implementation of control strategy.
In order to verify effectiveness of the invention, emulation experiment is carried out, micro-capacitance sensor was switched to islet operation mould at 0.3 second
Formula.Attached drawing 4 indicates all distributed generator output voltage amplitude situations of change in group, finally tends to desired value respectively
311V；Attached drawing 5 describes the output voltage amplitude triggered time interval of distributed generator 2, and attached drawing 6 then describes distributed hair
The triggered time interval of the reactive power output rating of motor 3, the abscissa of ' ° ' number indicates the triggered time of relevant variable in figure,
Ordinate indicates that this triggers the time interval triggered according to last time.It can be seen that information triggering moment is discrete, and with not
Deng the triggering period.This illustrates that event trigger mechanism can dynamically adjust triggering week according to the situation of change of system mode
Phase realizes the on-demand transmission of data, to reduce communication network pressure.
The present invention is directed to includes the micro-grid systems of more distributed generators, provides a kind of based on event trigger mechanism
Secondary voltage control strategy belongs to intelligent grid control field.Every distributed generator utilizes self information and can be with it
The information for carrying out other distributed generators of information exchange, builds rational event trigger mechanism and corresponding distributed coordination
Control strategy so that the output voltage amplitude of all distributed generators traces into leader.The advantage of the invention is that protecting
On the basis of card control task efficiently accomplishes, the on-demand transmission of information between distributed generator is realized, reduce network communication pressure
Power, to ensure intelligent grid voltage stabilization.
As it will be easily appreciated by one skilled in the art that the foregoing is merely the general steps of the present invention, not limiting this
Invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should be included in this hair
Within bright protection domain.
Claims (1)
1. a kind of micro-capacitance sensor distribution secondary voltage control method based on event trigger mechanism, it is characterised in that：Include specifically
Following steps：
Step 1, systematic parameter is set；
Step 2, reactive power-voltage droop control strategy of i-th of the distributed generator of setting in t moment；
Step 3, the input variable and output variable that setting secondary voltage controls；
Step 4, more distributed generator communication network topologies are described：
Step 5, event trigger policy is designed；
Step 6, secondary voltage control strategy is designed；
In step 1, the systematic parameter of setting includes contained distributed generator number and every distribution in given micro-capacitance sensor
The reference value of the output voltage amplitude of formula generator；
In step 2, the reactive power-voltage droop control strategy is specially：
vodi(t)=vsi(t)-niQi(t)；
Wherein, vsi(t) be droop control voltage magnitude reference signal, Qi(t) be i-th distributed generator idle work(
Rate, vodi(t) be i-th distributed generator voltage controller voltage magnitude reference signal, niIt is droop control coefficient；
In step 3, input variable is the reference input v of droop control described in step 2si(t), wherein settingThenOutput variable is the output voltage amplitude v of generatorodi(t)；
In step 4, more distributed generator communication network topologies are described：One communication connection coefficient a of settingijIf i, i=1,
2 ... n and j, j=1,2 ... n presence can interact d shaft voltage information vodi(t) and vodj(t) communication link, then be arranged aij
=1, on the contrary aij=0, while arranging aii=0；If i-th of distributed power generation function receives vref, then a is seti0=1, on the contrary ai0
=0；
In steps of 5, t is carved at the beginning0, enable all distributed generators send the voltage magnitude of itself via communication network,
And the initial trigger moment is set and isFor i-th of distributed generator, if the last time about its voltage magnitude touches
Hair the moment be?Moment, if following trigger conditions：
Meet, whereinbi(t)
=| α xi(t)+βsign(xi(t)) |+γ, α, β and γ are normal number, and sign () indicates sign function,Indicate jth (j=
1,2 ..., n) the last triggering moment about voltage magnitude of a distributed generator before t moment, | Ni| it indicates
Neighbours' number of i-th of distributed generator, then mark the moment t to beAnd i-th of distributed generator by its own
The triggering information of voltage magnitudeIt stores and is sent to other distributed generators that can be communicated in group；
In step 6, whenWhen, setting i-th (i=1,2 ..., n) a distributed generator secondary voltage control
Strategy is
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| CN108512253A (en) * | 2018-05-18 | 2018-09-07 | 安徽大学 | The distributed collaboration control method of micro-capacitance sensor based on dynamic event trigger mechanism |
| CN109066709B (en) * | 2018-09-29 | 2021-07-30 | 南方电网科学研究院有限责任公司 | Meta-model-based distributed power supply in-situ voltage control strategy improvement method |
| CN109870905B (en) * | 2019-02-20 | 2021-09-21 | 杭州电子科技大学 | Distributed optimization method for multi-robot event driven communication |
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| CN102749845A (en) * | 2012-06-15 | 2012-10-24 | 华中科技大学 | Electric system state feedback controller construction method based on event trigger mechanism |
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| CN104821604A (en) * | 2015-03-26 | 2015-08-05 | 南京邮电大学 | Multi-photovoltaic generator group coordination control method based on event trigger mechanism |
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