CN103208814A - Scalable vector graphics (SVG) power quality management engineering application method based on micro-network wide-area information - Google Patents
Scalable vector graphics (SVG) power quality management engineering application method based on micro-network wide-area information Download PDFInfo
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- CN103208814A CN103208814A CN201310088051XA CN201310088051A CN103208814A CN 103208814 A CN103208814 A CN 103208814A CN 201310088051X A CN201310088051X A CN 201310088051XA CN 201310088051 A CN201310088051 A CN 201310088051A CN 103208814 A CN103208814 A CN 103208814A
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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
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- 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
Abstract
The invention discloses a scalable vector graphics (SVG) power quality management engineering application method based on micro-network wide-area information. The traditional SVG obtains power quality management demand information on the basis of bus voltage and line current. The SVG power quality management engineering application method based on the micro-network wide-area information expands information sources, provides a SVG control strategy based on the wide-area information, and well solves multi-objective management of micro-network power quality. Simultaneously, through coordination control of the SVG and a micro-network control system, the micro-network control system can regulate micro sources and loads of a micro network when SVC compensation cannot solve the problem of power quality totally, and therefore power quality management of the micro network is completed well.
Description
Technical field
The invention belongs to electric power system distributed power generation microgrid and microgrid system control technology field, particularly a kind of realization of using based on the SVG power quality controlling engineering of microgrid Wide-area Measurement Information.
Background technology
Microgrid is to have the electric power system that clear region is divided, and the power that people are developed microgrid is that people are for the demand of the aspects such as electrical network access of power supply reliability, intelligent power and the generating of distributed renewable and clean energy resource.Distributed renewable and clean energy resource generating often needs could insert electrical network through current transformer, and current transformer need consume idle, and they also may be potential harmonic sources, similarly also has loads such as charging device of electric automobile; Other factors comprise the non-linear and asymmetry of load and the unsteadiness of new forms of energy etc.; Amid all these factors, microgrid faces multiple power quality problems such as current harmonics, imbalance and voltage fluctuation.
The SVG(static reacance generator, also be D-STATCOM) be one of state-of-the-art quality of power supply adjusting device of current technology, it has powerful, function admirable, characteristics that cost performance is high, can comprehensively solve power quality problems such as idle deficiency, voltage fluctuation and flicker, current distortion in the distribution.The improvement that applies it to the quality of power supply relevant issues of carrying out microgrid in the microgrid early has correlative study at home and abroad.But great majority research at the control technology of SVG be single with SVG as control appliance, regulate the output of SVG according to the single-point electric information of SVG monitoring, carry out power quality controlling.Though this control method can solve the power quality problem of microgrid to a certain extent, be unfavorable for that the multiobjective optimization of the microgrid quality of power supply is administered.
For these reasons, this patent proposes a kind of SVG control method based on the microgrid Wide-area Measurement Information, makes SVG and the associated working of microgrid supervisory control system, realizes the coordination control of the two.The intellectuality of microgrid is also laid a good foundation for the SVG control based on the microgrid Wide-area Measurement Information.Between SVG and microgrid supervisory control system, set up and communicate by letter, make that the SVG controller can be by the operating condition of all little sources in the whole microgrid of the microgrid supervisory control system real-time tracking system and microgrid load, realize SVG and microgrid supervisory control system coordination control, thereby better finish the improvement of the quality of power supply of microgrid.
Summary of the invention
The objective of the invention is, overcome traditional SVG formulates control strategy according to single-point electric parameters information deficiency, at microgrid power quality controlling problem, the microgrid Wide-area Measurement Information is joined the formulating method of the control strategy of SVG, realize that SVG and the coordination to microgrid power quality controlling problem of microgrid supervisory control system control.SVG can be according to the microgrid Wide-area Measurement Information, at the microgrid harmonic wave, three-phase voltage is asymmetric and voltage power quality problem such as falls and formulates control strategy and realize that multiple target administers, when SVG can't finish the power quality controlling target, by the operating condition of microgrid supervisory control system according to all little sources and load in the microgrid, by optimal control policy little source and load are adjusted accordingly, further the quality of power supply is administered.
For this reason, the technical solution used in the present invention is: the SVG power quality controlling engineering based on the microgrid Wide-area Measurement Information in is used realization, described microgrid comprises batteries to store energy system, wind generator system, photovoltaic generating system, diesel engine generator, important load and non-important load and microgrid supervisory control system and the microgrid circuit breaker that is incorporated into the power networks, described power-supply system and load all are connected on the bus, and the present invention is characterised in that:
Based on microgrid real-time digital network communicating system, quality of power supply information except microgrid voltage, electric current, the operating condition of all little sources and load in all right whole microgrid of the real-time tracking system of SVG, realize SVG and microgrid supervisory control system coordination control, when SVG can not reach management goal, the microgrid supervisory control system in time responds the request of SVG, and little source and load are adjusted accordingly, and the microgrid quality of power supply is done further improvement.
Above-mentioned SVG power quality controlling engineering based on the microgrid Wide-area Measurement Information is used and is realized that SVG controller and microgrid supervisory control system communication protocol realize according to the IEC-61850 agreement.
Above-mentioned SVG power quality controlling engineering based on the microgrid Wide-area Measurement Information is used and is realized that the microgrid quality of power supply is at first carried out the formulation of control strategy by SVG according to the microgrid Wide-area Measurement Information that collects, and makes every effort to obtain more satisfying the control strategy of power quality controlling requirement.
Above-mentioned SVG power quality controlling engineering based on the microgrid Wide-area Measurement Information is used and is realized, SVG according to the microgrid Wide-area Measurement Information at the microgrid harmonic wave, three-phase voltage is asymmetric and voltage power quality problem such as falls and realizes that the optimization of multiple target hierarchical layered administers.
Above-mentioned SVG power quality controlling engineering based on the microgrid Wide-area Measurement Information is used and is realized, when exceeding the Governance Ability of SVG, by the operating condition of microgrid supervisory control system according to all little sources and load in the microgrid, by optimal control policy little source and load are adjusted accordingly, further the quality of power supply is administered.
The present invention has well overcome traditional SVG based on the demand information of busbar voltage and line current acquisition power quality controlling, and this patent extend information source proposes the SVG control strategy based on Wide-area Measurement Information, and the multiple target that solves the microgrid quality of power supply is better administered.Simultaneously, the coordination control of SVG and microgrid control system, make that the microgrid control system can be when the SVG compensation can not solve power quality problem fully, bring into play it to the regulating action of microgrid, by adjusting the quality of power supply is polluted to exert oneself in bigger little source or the non-important uncontrollable load of cut-out and reduce mode such as charge power by certain gradient and further finish improvement to the quality of power supply.
Description of drawings
Fig. 1. a kind of implementation structure figure that uses based on the SVG power quality controlling engineering of microgrid Wide-area Measurement Information;
Fig. 2. a kind of realization microgrid supervisory control system control flow chart of using based on the SVG power quality controlling engineering of microgrid Wide-area Measurement Information.
Embodiment
The realization that the SVG power quality controlling engineering based on the microgrid Wide-area Measurement Information is as shown in Figure 1 used, described microgrid comprises batteries to store energy system, wind generator system, photovoltaic generating system, diesel engine generator, important load and non-important load and microgrid supervisory control system and the microgrid circuit breaker that is incorporated into the power networks, and described power-supply system and load all are connected on the bus.
Between microgrid supervisory control system and SVG, set up based on the network service of IEC-61850 real-time digital, SVG is except gathering the quality of power supply information of microgrid voltage, electric current, the operating condition of all little sources and load in all right whole microgrid of the real-time tracking system, realize SVG and microgrid supervisory control system coordination control, when SVG can not reach management goal, the microgrid supervisory control system in time responds the request of SVG, and little source and load are adjusted accordingly, and the microgrid quality of power supply is done further improvement.
Aforesaid SVG power quality controlling engineering based on the microgrid Wide-area Measurement Information is used and is realized, require the data model of SVG control to meet the IEC-61850 standard fully, to satisfy the needs of between microgrid supervisory control system and SVG, setting up based on the communication of IEC-61850 protocol data.
Communicate by letter based on the IEC-61850 protocol data of setting up between SVG and the microgrid supervisory control system that satisfies, SVG can collect the information of the whole microgrid except busbar voltage and line current, the operating condition of all little sources and load in the whole microgrid of the real-time tracking system comes the quality of power supply of microgrid is administered thereby make the control strategy that more can satisfy the power quality controlling requirement.Can also realize simultaneously SVG and microgrid supervisory control system coordination control, when the improvement of the microgrid quality of power supply of SVG can not reach requirement, can be by the operating condition of microgrid supervisory control system according to all little sources and load in the microgrid, by optimal control policy little source and load are adjusted accordingly, further the quality of power supply is administered.
Aforesaid SVG power quality controlling engineering based on the microgrid Wide-area Measurement Information is used and is realized, SVG gather the microgrid Wide-area Measurement Information at the microgrid harmonic wave, three-phase voltage is asymmetric and voltage power quality problem such as falls and realizes that the optimization of multiple target hierarchical layered administers.
As shown in Figure 2, in order to finish the microgrid supervisory control system to the further improvement of the quality of power supply, require the microgrid supervisory control system according to the demand of power quality controlling, the request of response SVG in time, as required the disturbing source (mainly being little source and non-important load) that exceeds the SVG Governance Ability is administered, set up additional control, by optimal control policy exerting oneself and loading and regulate by optimal control policy each little source in the microgrid.By adjusting the quality of power supply is polluted to exert oneself in bigger little source or the non-important uncontrollable load of cut-out and reduce mode such as charge power by certain gradient and further improve the microgrid quality of power supply.
Optimal control policy: at first the significance level of the pollutant sources that produce a certain quality of power supply is assessed, the assessment principle is that significance level is more high, and its important factor is more big; Secondly pollutant sources are produced pollution level and assess, the assessment principle is that pollution level is more big, and its pollution factor is more big.Suppose the important factor of the individual little source of the n of a certain microgrid or load is respectively k
1, k
2... k
i... k
n, its pollution level factor is respectively: T
1, T
2... T
i... T
n, the weights of setting important factor according to the operation needs are f
k, the weights of the pollution level factor are f
TThe combined influence factors A of little source or load
iFor
A
i=f
kk
i-f
TT
i
The combined influence factors A
iThis little source of more big explanation or load are more little to the influence degree of system, more serious to the pollution of system simultaneously.Sorted in each little source of existing in the microgrid or the combined influence factor of load, determine to reduce little source or the load of power output or excision under the present case: reduce it by certain gradient and exert oneself for controlling little source of exerting oneself or load (mainly referring to charger for automobile); For the load that can only carry out the switching operation, if its combined influence factors A maximum is then directly excised this load.Carry out above operation back if this power quality index does not still meet the demands, then to the rearrangement of combined influence factors A, repeat above operation.
Claims (3)
1. SVG power quality controlling engineering application process based on the microgrid Wide-area Measurement Information, described microgrid comprises the batteries to store energy system, wind generator system, photovoltaic generating system, diesel engine generator, important load and non-important load, and microgrid supervisory control system and the microgrid circuit breaker that is incorporated into the power networks, described power-supply system and load all are connected on the bus, it is characterized in that: based on microgrid real-time digital network communicating system, except microgrid voltage, the quality of power supply information of electric current, utilize the operating condition in all little sources and load in the whole microgrid of the SVG real-time tracking system, realize SVG and microgrid supervisory control system coordination control, when SVG can not reach management goal, the microgrid supervisory control system in time responds the request of SVG, little source and load are adjusted accordingly, the microgrid quality of power supply is done further improvement; SVG controller and microgrid supervisory control system communication protocol realize according to the IEC-61850 agreement.
2. a kind of SVG power quality controlling engineering application process based on the microgrid Wide-area Measurement Information according to claim 1 is characterized in that, the improvement of the microgrid quality of power supply adopts SVG to carry out the formulation of control strategy according to the microgrid Wide-area Measurement Information that collects.
3. a kind of SVG power quality controlling engineering application process based on the microgrid Wide-area Measurement Information according to claim 1 and 2, SVG according to the microgrid Wide-area Measurement Information at the microgrid harmonic wave, three-phase voltage is asymmetric and voltage falls power quality problem and realizes that the optimization of multiple target hierarchical layered administers.
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| CN103391218A (en) * | 2013-07-25 | 2013-11-13 | 云南电力试验研究院（集团）有限公司电力研究院 | Management system applied to electric system and based on data hierarchy and classification |
| CN104505851A (en) * | 2015-01-09 | 2015-04-08 | 成都鼎智汇科技有限公司 | Battery energy storage system with reactive adjusting function |
| CN106856331A (en) * | 2015-12-09 | 2017-06-16 | 中国电力科学研究院 | A kind of grid-connected performance test methods of wind-light combined power generation system |
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| CN103391218A (en) * | 2013-07-25 | 2013-11-13 | 云南电力试验研究院（集团）有限公司电力研究院 | Management system applied to electric system and based on data hierarchy and classification |
| CN103391218B (en) * | 2013-07-25 | 2016-06-01 | 云南电力试验研究院（集团）有限公司电力研究院 | A kind of be applied to power system based on data management system at different levels |
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| CN106856331A (en) * | 2015-12-09 | 2017-06-16 | 中国电力科学研究院 | A kind of grid-connected performance test methods of wind-light combined power generation system |
| CN106856331B (en) * | 2015-12-09 | 2020-10-13 | 中国电力科学研究院 | Grid-connected performance testing method for wind-solar combined power generation system |
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