CN103248059A - Reactive voltage optimization method and system for distribution network - Google Patents

Reactive voltage optimization method and system for distribution network Download PDF

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Publication number
CN103248059A
CN103248059A CN2013101651594A CN201310165159A CN103248059A CN 103248059 A CN103248059 A CN 103248059A CN 2013101651594 A CN2013101651594 A CN 2013101651594A CN 201310165159 A CN201310165159 A CN 201310165159A CN 103248059 A CN103248059 A CN 103248059A
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China
Prior art keywords
distribution network
voltage
power distribution
reactive
power
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CN103248059B (en
Inventor
徐柏榆
马明
罗耀强
赵继光
杜波
李敏
李玎
王飞
王玲
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Electric Power Research Institute of Guangdong Power Grid Co Ltd
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NANJING ESTABLE ELECTRIC POWER TECHNOLOGY Co Ltd
Electric Power Research Institute of Guangdong Power Grid Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30Reactive power compensation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70Smart grids as climate change mitigation technology in the energy generation sector
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Abstract

The invention discloses a reactive optimization method for a distribution network. The method comprises the following steps: firstly, building an actual operation model of the distribution network, then conducting load flow calculation, analyzing the voltage quality, applying a reactive optimization administrative tool to formulate a reactive optimization scheme, adopting the simulated analysis method to examine and regulate the appointed optimization scheme, and finally achieving reactive optimization of the distribution network according to the regulated reactive optimization scheme. The invention also discloses a reactive voltage optimization system for the distribution network, which corresponds to the method. The method and the system solve the difficult reactive optimization problem of the distribution network and provide theoretical foundation and decision support for planning, operation, reconstruction and management of the whole distribution network.

Description

Power distribution network reactive Voltage Optimum method and system
Technical field
The present invention relates to technical field of power systems, particularly relate to a kind of GA for reactive power optimization method and system.
Background technology
Along with the raising of high speed development of national economy and living standards of the people, people are growing to the demand of electric power, simultaneously reliability and the power supply quality of power supply had higher requirement.Because the continuous increase of network load has not only changed network configuration and the power distribution of electric power system, and caused the idle distribution of system unreasonable, even generally lower situation of the idle wretched insufficiency in some areas, voltage levvl may appear.Whether power system reactive power distributes reasonable, and not only being related to electric power system provides the quality of the quality of power supply to the user, but also directly influences fail safe and the economy of electrical network self-operating.The purpose of idle work optimization is just in order to improve the situation of idle irrational distribution, thereby improves quality of voltage.
The optimization object of idle work optimization concentrates on the transmission of electricity major network mostly, do not extend to power distribution network, and the feature of power distribution network is more complicated, needs more means to participate, and does not still have adoptable prioritization scheme at present.
Summary of the invention
Based on above-mentioned situation, the present invention proposes a kind of power distribution network reactive Voltage Optimum method and system, so that power distribution network is carried out reactive Voltage Optimum.
A kind of power distribution network reactive Voltage Optimum method comprises step:
Based on power distribution network basic data, voltage and idle service data, build power distribution network actual motion model;
Utilize trend to calculate, analyze medium-voltage line and the distribution net platform region quality of voltage of described power distribution network actual motion model;
According to medium-voltage line and the distribution net platform region quality of voltage of described power distribution network actual motion model, use the idle work optimization management tool, formulate the reactive Voltage Optimum scheme of power distribution network;
Utilize the method for simulation analysis, check and adjust described prioritization scheme;
According to the described prioritization scheme after adjusting power distribution network is carried out reactive Voltage Optimum.
A kind of power distribution network reactive Voltage Optimum system comprises:
Model is built the unit, is used for based on power distribution network basic data, voltage and idle service data, builds power distribution network actual motion model;
The quality of voltage analytic unit is used for utilizing trend to calculate, and analyzes medium-voltage line and the distribution net platform region quality of voltage of described power distribution network actual motion model;
Prioritization scheme is formulated the unit, is used for medium-voltage line and distribution net platform region quality of voltage according to described power distribution network actual motion model, uses the idle work optimization management tool, formulates the reactive Voltage Optimum scheme of power distribution network;
Described prioritization scheme is checked and adjusted to the prioritization scheme adjustment unit for the method for utilizing simulation analysis;
Prioritization scheme is implemented the unit, is used for according to the described prioritization scheme after adjusting power distribution network being carried out reactive Voltage Optimum.
GA for reactive power optimization method and system of the present invention utilizes methods such as the calculating of distribution trend, idle work optimization management, equipment state assessment, formulates and implement the reactive Voltage Optimum scheme of power distribution network.Solved the difficult problem of GA for reactive power optimization, for planning, operation, transformation and the management of whole power distribution network provides theoretical foundation and decision support.
Description of drawings
Fig. 1 is the schematic flow sheet of power distribution network reactive Voltage Optimum method of the present invention;
Fig. 2 is the structural representation of power distribution network reactive Voltage Optimum of the present invention system.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further described in detail.Should be appreciated that embodiment described herein only in order to explain the present invention, does not limit protection scope of the present invention.
Power distribution network reactive Voltage Optimum method of the present invention as shown in Figure 1, comprises step:
Step S101, based on power distribution network basic data, voltage and idle service data, build power distribution network actual motion model;
Step S102, utilize trend to calculate, analyze medium-voltage line and the distribution net platform region quality of voltage of described power distribution network actual motion model;
Step S103, according to medium-voltage line and the distribution net platform region quality of voltage of described power distribution network actual motion model, use the idle work optimization management tool, formulate the reactive Voltage Optimum scheme of power distribution network;
Step S104, utilize the method for simulation analysis, check and adjust described prioritization scheme;
Step S105, according to the described prioritization scheme after adjusting power distribution network is carried out reactive Voltage Optimum.
Build in the actual motion model process of power distribution network, employed basic data preferably includes:
110kV, 35kV transformer station topology information;
Substation transformer gear, capacity, outfit reactive capability information;
Transformer station's outlet current curve data;
Substation bus bar voltage fluctuation situation;
10kV circuit geographic information data;
The 10kV capacity of distribution transform;
Distribution transformer capacity, actual motion current curve, idle configuration information;
The distribute-electricity transformer district topology information.
SVG is a kind of open X-Y scheme descriptive language based on extensible language XML by the issue of W3C tissue, and preferably, the electrical network Graphical Data Exchange adopts the mode of SVG file to exchange in the power distribution network actual motion model.
The CIM electric network model is for the information model of describing all object logics structures of electric power system and topological relation, adopts XML as coding and the transformat of data of description object, and it can provide unified electric power system logical description.Preferably, the mode of graph topology The data CIM exchanges in the power distribution network actual motion model.
As a preferred embodiment, the process of building described power distribution network actual motion model comprises:
A) utilizing the SVG structure to create all kinds of pels describes;
B) utilize the CIM model to set up the power distribution network topological structure;
C) set up the descriptive model of all kinds of concrete equipment, comprise transformer, on-load switch, overhead transmission line, cable line, load etc., describe whole power distribution network actual track with this;
As a preferred embodiment, the step that described trend is calculated comprises:
A) computation model of elements such as introducing transformer, circuit, load in conjunction with the characteristics of power distribution network, carries out the suitability operation to model, introduces the computation model of distributed power source simultaneously;
B) at first can't collect complete characteristics at all power datas of power distribution network electricity consumption side, set up load preassignment model, the power of 10kV outlet side is effectively distributed, solve the incomplete problem of power distribution network data;
C) to the operation of unlinking of the weak ring of power distribution network;
D) push back for method before the utilization, carry out the trend computing, the trend of obtaining each node distributes and voltage condition, in conjunction with the voltage fluctuation data of 10kV outlet side, obtains the voltage fluctuation data of the whole network, rate of qualified voltage situation and the line loss situation of statistics the whole network.
As a preferred embodiment, described idle work optimization management tool comprises:
A) section management: can be by the algorithm section of will loading, by analysis-by-synthesis and data mining algorithm, obtain the section of typical case's day, typical case's moon or typical year, comprise average load section, peak load section and minimum load section, the profile data on basis is provided for the optimization modification measures;
B) idle work optimization scheme: according to different electric pressure electrical network history, the real-time load condition that reaches prediction, principle according to the idle in-situ balancing of layering and zoning, calculate through reactive power flow optimization, taking all factors into consideration on the basis of Technological Economy, rationally determining voltage power-less lectotype selection, compensation capacity, compensation way and installation site etc.;
C) equipment operation management: in real time collection site reactive-load compensation equipment, automatic Regulation equipment running status, and operation of power networks parameters such as the power flow of equipment mounting points, voltage, electric current, power factor.At first, can in time grasp the ruuning situation of circuit, distribute-electricity transformer district, the regulation effect of real-time assessment equipment by this system platform.Secondly, can in time grasp the operation conditions of equipment and carry out, and effectively manage.Moreover, by the power distribution network service data of collecting is assessed, emulation, can provide aid decision scheme or suggestion for continuing to improve quality of voltage.
Below idle work optimization management tool and emulation tool are launched to introduce.
One, idle work optimization compensation
(1) function description
Because lacking, reactive power source causes more residential customers terminal voltage regional power grid on the low side, according to reactive power optimization result of calculation, carry out transformer station, mesolow circuit, distribution transformer, user's side idle work optimization compensation construction, realize reactive layered subregion in-situ balancing, reduce idle a large amount of loss of flowing and causing, improve client supply power voltage quality.
(2) function realizes
System is mainly according to the idle work optimization computational analysis, according to different electric pressure electrical network history, the real-time load condition that reaches prediction, principle according to the idle in-situ balancing of layering and zoning, calculate through reactive power flow optimization, taking all factors into consideration on the basis of Technological Economy, rationally determine voltage power-less lectotype selection, compensation capacity, compensation way and installation site etc., carry out the idle work optimization compensation and build.Bigger or the important relatively transformer station in the load fluctuation amplitude, voltage-controlled capacitor tuning type capacitor complete compensator is adopted in suggestion, realizes the optimal control of transformer station's reactive power flow.In 10 kilovolt that radius of electricity supply is long, load is heavy, power factor is low, distribution transforming low-pressure side centralized compensation and the reactive power compensation pattern that the medium-voltage line compensation combines are adopted in suggestion, select the reactive power compensator of automatic grouping switching for use; 10 long in radius of electricity supply, as to load gently and comparatively concentrate kilovolt, 10 kilovolt centralized compensation patterns are adopted in suggestion, select automatic switching reactive compensator for use; In 10 kilovolt that radius of electricity supply is short, load is light, suggestion adopts the distribution transforming low-pressure side to concentrate the reactive power compensation pattern, realizes the idle in-situ balancing in power distribution station.
Two, section management
(1) function description
The section management tool is to provide the unified management instrument for data, the device parameter that carries out computing at every turn.Profile data can manually be imported or import, and generates automatically when the on-line system butt joint also can be arranged.
(2) function realizes
By voltage power-less monitoring and management, distribution automation, power information, distribution transformer monitoring, voltage monitoring equivalent lining platform, system provides the section management tool, can be by the algorithm section of will loading, by analysis-by-synthesis and data mining algorithm, obtain the section of typical case's day, typical case's moon or typical year, comprise average load section, peak load section and minimum load section, provide the profile data on basis for optimizing modification measures.The user can in optimizing process, select suitable load section to optimize by these load sections of manual amendment.
For the situation of considering the load growth rate, also provide the instrument of considering load growth rate correction load section, with the lasting effect for many years of realizing that low-voltage is administered.
Three, administer emulation
(1) function description
Be feasibility and the effect of in-advance prediction resolution, effect simulation emulation and comprehensive assessment can be done by the system of giving that carries into execution a plan.System provides complete emulation tool, covers operation measure emulation, circuit and the emulation of distribution transforming modification measures, the grid structure that solve the low-voltage problem and transforms emulation, newly-increased power supply drop point emulation, control measures emulation etc., for transforming the means that decision-making provides science.
(2) function realizes
System provides complete emulation tool, many aspects such as the operation measure emulation of covering solution low-voltage problem, modification measures emulation, control measures emulation.
A) operation measure emulation
The operation measure is that a kind of small investment, enforcement are quick, the low-voltage control measures of instant effect.Main purpose is to utilize platform and data, to adapt to each node voltage level under the emulation employing different running method under the different section.By good coordination control, can alleviate greatly even most of low-voltage problem of resolution system.
For modification measures, operation measure instant effect.Because do not need picture to build measures such as transformer station's drop point, need a large amount of transformation and building time, do not need picture more exchange device and the great amount of investment that produces yet, can not produce the grid power blackout that exchange device more brings yet, influence power supply reliability.Move being also advantageous in that of measure in addition and improved the dynamic property of system, improved the automatization level of system, for the intelligent power distribution net provides the basis, avoided overlapping investment.
The operation measure emulation of multilevel coordination control helps to improve quality of voltage.The voltage of better more rational control 10kV bus, feeder line, distribute-electricity transformer district and idle can be optimized quality of voltage and loss.10kV busbar voltage level has directly determined the voltage levvl on the 10kV feeder line.Therefore only need be at the serious section of low-voltage problem or on the period, (10.0kV~10.7kV) integral body is raised, and limit operation on the upper side is basically with regard to most of low-voltage problem in can resolution system in the voltage acceptable ranges with the 10kV busbar voltage.
Because under the 10kV bus, generally formed by some feeder lines, the running status of every feeder line is neither identical, therefore, the voltage of this feeder line of needs control and idle, by direct control capacitor switching or set the mode of the power factor set point of capacitor indirectly, adjust the gear of load tap changer, realize the voltage control of 10kV feeder line, distribution transformer.
B) modification measures emulation
Track replacement is transformed
Circuit line footpath is meticulous to cause the excessive and low-voltage problem that causes of pressure drop, and platform provides the low-voltage effect display function after circuit types is changed.Long for some circuit, also can check the shortening radius of electricity supply, emulation low-voltage regulation effect by changing Route Length.
The emulation that distribution transforming is changed or increased
For some old transformer, the loss of voltage of distribution transforming is bigger, can directly consider to adopt novel transformer or by original distribution transforming, set up new distribution transforming, can emulation to determine the low-voltage regulation effect of new departure
Idle plan optimization transformation
By setting the capacitor compensation amount of distribution transforming low-pressure side, compensate the improvement situation of improved low-voltage in order to emulation.
The emulation of distribution transforming tap
Original distribution transforming all is that No-load changer becomes, violent or simple by setting the circuit that the transformer gear just can reach solution low-voltage problem for some load variations, can change in order to emulation distribution transforming gear by the transformer gear manually is set, improve the effect of low-voltage.
The new drop point deployment of transformer station and circuit are cut and are changed
For certain areas, because the long low-voltage problem that causes of radius of electricity supply can be solved by the mode of setting up simple and easy transformer station and 10kV feeder line drop point.Behind the 10kV feeder line drop point that increases newly, original long feeder line directly cut change on the new 10kV feeder line, under can the emulation new topology situation, the low-voltage problem of system.
New forms of energy insert emulation
For the Northwest, scarcely populated and solar energy, the area that wind energy is abundant, appropriateness is promoted small-size wind power-generating, solar power generation directly inserts on the serious feeder line of low-voltage problem, in order to solve more serious low-voltage problem.
Native system is provided in the 10kV network and directly adds new forms of energy and insert, thereby calculates by complete trend, can emulation and show the new forms of energy access after reforming effect.
The emulation of low pressure 380V
Native system provides the three-phase power flow algorithm of 380V low-pressure side, the user can pass through self-defined modeling function, determine structure and the bearing power of secondary network, and by three trends calculating, ruuning situation that can the emulation secondary network, the low-voltage problem that causes because low-voltage circuit is long, the line footpath is meticulous for some can directly display.
C) control measures emulation
Three-phase imbalance
The 10kV three-phase power imbalance causes the low-voltage problem of some heavy load phase, can alleviate the low-voltage problem by the measure of three-phase imbalance transformation.System provides after the user transforms three-phase imbalance, and the emulation three-phase imbalance is administered the effect of low-voltage problem and showed.
Wrong peak load
Wrong peak load mainly be regulation and control by economy or policy, the maximum load of electrical network was staggered to other periods, will make the peak load section of electrical network reduce like this.For the low-voltage problem, reducing of peak load section can alleviation or solution low-voltage problem.System provides the copying of wrong peak load, mainly is by update the system peak load section, checks with emulation.
The examination of large user's power factor
Capacity of distribution transform has all been joined reactive power compensator greater than the large user of 100kVA at present, but do not carry out timely switching according to the electricity consumption situation, reactive-load compensation equipment fault occurred and has not also in time overhauled and change, user's side just can't reach local compensation like this, has increased reactive voltage for local distribution and regulates pressure.According to user's side power factor is carried out on-line monitoring, strengthening appraisal management for next step provides foundation.
Equipment control and examination
By the management that transformer gear, reactive apparatus, gear are regulated, formulate effective performance assessment criteria, and with performance assessment criteria and every month actual gear adjusting, idle switching.System provides the emulation to each gear, idle switching plan, and is main by the operational plan of equipment being simulated the quality of voltage in each circuit, platform district.
Four, Technological Economy relatively
(1) function description
The multiple resolution that draws by assistant analysis is analyzed from technical feasibility, two aspects of economic feasibility, also the scheme of manual intervention can be participated in comparative analysis to draw optimized carrying into execution a plan.
(2) function realizes
By section management and effect emulation, system can draw several feasible schemes for using personnel selection, and system can be analyzed scheme from technical feasibility degree and two aspects of economy.The personnel that use simultaneously also can be analyzed with existing scheme then by the scheme of manual amendment system.
Technical feasibility.At first the priority that adopts in the scheme of providing for system is that order according to management improvement, operational development, technological transformation, planning and improvement proposes.Can consider to transform the simple and easy degree of enforcement, the maturity of equipment and technology, the simple and easy degree of equipment installation and the maturity of plant maintenance simultaneously in the technical elements system.Weight and the technical feasibility that draws scheme by these indexs.
Economic feasibility.System can assess equipment from the purchase cost of equipment, installation cost and being maintained as originally of equipment of equipment, manually comprises installation, maintenance etc. to what relate in the scheme simultaneously, draws the economic feasibility of scheme at last by the mode of weight.
System provides the concrete contrast of every index after the contrast of finishing technology, economy, for using the final embodiment of personnel selection.
Five, equipment operation monitoring
5.1 equipment operation monitoring
(1) function description
System is by the service data of the intelligent abatement equipment of collection site, the actual regulation effect of feedback with evaluation quality of voltage, and provide up-to-date service data for next analysis decision circulates.Reach closed loop and monitor and dynamically improvement, continue to improve the purpose of supply power voltage quality.
(2) function realizes
The real-time collection site reactive-load compensation equipment of system, automatic Regulation equipment running status, and operation of power networks parameter such as power flow of equipment mounting points, voltage, electric current, power factor.At first, can in time grasp the ruuning situation of circuit, distribute-electricity transformer district, the regulation effect of real-time assessment equipment by this system platform.Secondly, system can in time grasp the operation conditions of equipment and carry out, and effectively manages.Moreover, by to systematic collection to the power distribution network service data assess, emulation, can provide aid decision scheme or suggestion for continuing to improve quality of voltage.
Intelligent voltage quality controlling equipment comprises intelligent substation reactive power compensation, 10kV intelligent powerless compensation equipment, 10kV automatic Regulation equipment, intelligent on-load voltage regulation distribution transformer, automatic loaded capacity-regulated distribution transformer, intelligent capacitor, intelligent equipments such as D-STATCOMM, SVC.These intelligent equipments integrate functions such as automatic collection, control automatically, alarm automatically, storage automatically, remote transmission, man-machine interaction.
5.2 coordinate control
(1) function description
Coordinating control subsystem mainly is according to the whole network idle work optimization result of calculation, transformer station, 10 kilovolt, distribution transformer are carried out idle work optimization compensation configuration, realize reactive layered subregion in-situ balancing, effectively reduce the rural power grids loss, improve client supply power voltage quality.Comprehensive utilization modern communication technology, automatic control technology and short-term, ultra-short term technology, but realization is controlled the idle coordination of multilevel voltage multinomial, different layers that reactive-load compensation equipment, distribution line reactive-load compensation equipment and regulator, distribution transforming low-pressure side reactive-load compensation equipment in on-load voltage regulation main transformer, the transformer station station are equal to layer, effectively improves the supply power voltage quality.
(2) function realizes
Involve a wide range of knowledge in " low-voltage " problem, number of users is many, take single pressure regulation means can't satisfy the power supply area that voltage is adjusted demand, the pressure regulation nargin of the system that takes full advantage of voltage power-less equipment at different levels, overcome the limitation of single voltage regulating mode, improve rural power grids regulating and controlling voltage ability, improve power supply quality.
Transformer station, circuit, distribution transforming voltage three cascade adjusting systems.Be important evidence with client voltage, comprehensive utilization modern communication technology, automatic control technology and short-term, ultra-short term technology, but realization is controlled the idle coordination of multilevel voltage multinomial and different layers that reactive-load compensation equipment, 10 kilovolt reactive-load compensation equipments and regulator, distribution transforming low-pressure side reactive-load compensation equipment in on-load voltage regulation main transformer, the transformer station station are equal to layer, effectively improves the supply power voltage quality.
It is key function in the operation measure that station track is joined reactive voltage three cascades regulation and control software processed, the low-voltage problem has idle deficiency under a lot of situations, idle imbalance to cause, at first should use idle work optimization operation measure to solve, on the idle work optimization basis as still have part low-voltage problem also unresolved, further adopting the rack modification measures to solve, is both economical and effective measures.Reactive voltage is coordinated control software according to rural power grids the whole network idle work optimization result of calculation, transformer station, 10 kilovolt, distribution transformer are carried out idle work optimization compensation configuration, realize reactive layered subregion in-situ balancing, effectively reduce the rural power grids loss, improve client supply power voltage quality.
Be that unit carries out idle work optimization with the feeder line, can provide the adjusting of distribution transforming tap gear, distribution transforming reactive power compensator switching, the suggestion of SVG target.Push back for trend before distribution AVC adopts and extrapolate 10kV bus target voltage according to the distribute-electricity transformer district target voltage.Carry out real-time optimization by the distribution of distribution AVC and regulate, can improve the distribution rate of qualified voltage greatly.
Distribution capacitor switching and distribution transforming gear based on genetic algorithm are regulated.The target of distribution capacitor switching is the active power loss that reduces system by the distribution that changes idle stream in the electrical network, the voltage of optimization system simultaneously.In the zone of having realized power distribution automation, the reactive power compensation of global optimization can be used as a subsystem.Algorithm bag based on the global optimization of genetic algorithm runs on control centre, sets certain thresholding or compensation target, according to the real-time trend information of distribution, determines compensation point and compensation rate, sends action command by control centre to compensation arrangement.Moved by intelligent capacitor switching device then, realize overall idle optimal target.In the power distribution automation unconsummated zone of communicating by letter, adopt conventional local compensation policy.The reactive power compensator that requires to adopt can be realized the various control strategy easily, realizes with idle amount serving as that control target, time and voltage are the multiple control modes of control target.
Power distribution network reactive Voltage Optimum of the present invention system as shown in Figure 2, comprising:
Model is built the unit, is used for based on power distribution network basic data, voltage and idle service data, builds power distribution network actual motion model;
The quality of voltage analytic unit is used for utilizing trend to calculate, and analyzes medium-voltage line and the distribution net platform region quality of voltage of described power distribution network actual motion model;
Prioritization scheme is formulated the unit, is used for medium-voltage line and distribution net platform region quality of voltage according to described power distribution network actual motion model, uses the idle work optimization management tool, formulates the reactive Voltage Optimum scheme of power distribution network;
Described prioritization scheme is checked and adjusted to the prioritization scheme adjustment unit for the method for utilizing simulation analysis;
Prioritization scheme is implemented the unit, is used for according to the described prioritization scheme after adjusting power distribution network being carried out reactive Voltage Optimum.
As a preferred embodiment, the described basic data of power distribution network comprises:
110kV, 35kV transformer station topology information;
Substation transformer gear, capacity, outfit reactive capability information;
Transformer station's outlet current curve data;
Substation bus bar voltage fluctuation situation;
10kV circuit geographic information data;
The 10kV capacity of distribution transform;
Distribution transformer capacity, actual motion current curve, idle configuration information;
The distribute-electricity transformer district topology information.
As a preferred embodiment, described model is built the unit and is comprised:
The pel describing module is used for utilizing the SVG structure to create all kinds of pels and describes;
Topological structure is set up module, is used for utilizing the CIM model to set up the power distribution network topological structure;
The device model describing module for the descriptive model of setting up various kinds of equipment, forms power distribution network actual motion model, and described various kinds of equipment comprises transformer, on-load switch, overhead transmission line, cable line and load.
As a preferred embodiment, described quality of voltage analytic unit comprises the trend computing module, and described trend computing module comprises:
The model adaptation module is used for the characteristics according to power distribution network, the computation model of transformer, circuit, load is carried out the suitability operation, and introduce the computation model of distributed power source;
Load model is set up module, be used for to set up load preassignment model, and the power of 10kV outlet side is distributed, and makes the power data of power distribution network electricity consumption side complete;
The weak ring module of unlinking is used for the operation of unlinking of weak ring to power distribution network;
The voltage fluctuation analysis module pushes back for method before being used for utilizing, and carries out the trend computing, the trend of obtaining each node distributes and information of voltage, in conjunction with the voltage fluctuation data of 10kV outlet side, obtain the voltage fluctuation data of the whole network, rate of qualified voltage and the line loss of statistics the whole network.
As a preferred embodiment, described idle work optimization management tool comprises: section management tool, idle work optimization scheme are determined instrument and equipment operation management instrument.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.

Claims (10)

1. a power distribution network reactive Voltage Optimum method is characterized in that, comprises step:
Based on power distribution network basic data, voltage and idle service data, build power distribution network actual motion model;
Utilize trend to calculate, analyze medium-voltage line and the distribution net platform region quality of voltage of described power distribution network actual motion model;
According to medium-voltage line and the distribution net platform region quality of voltage of described power distribution network actual motion model, use the idle work optimization management tool, formulate the reactive Voltage Optimum scheme of power distribution network;
Utilize the method for simulation analysis, check and adjust described prioritization scheme;
According to the described prioritization scheme after adjusting power distribution network is carried out reactive Voltage Optimum.
2. power distribution network reactive Voltage Optimum method as claimed in claim 1 is characterized in that, the described basic data of power distribution network comprises:
110kV, 35kV transformer station topology information;
Substation transformer gear, capacity, outfit reactive capability information;
Transformer station's outlet current curve data;
Substation bus bar voltage fluctuation situation;
10kV circuit geographic information data;
The 10kV capacity of distribution transform;
Distribution transformer capacity, actual motion current curve, idle configuration information;
The distribute-electricity transformer district topology information.
3. power distribution network reactive Voltage Optimum method as claimed in claim 1 or 2 is characterized in that, the process of building described power distribution network actual motion model comprises:
Utilizing the SVG structure to create all kinds of pels describes;
Utilize the CIM model to set up the power distribution network topological structure;
Set up the descriptive model of various kinds of equipment, form power distribution network actual motion model, described various kinds of equipment comprises transformer, on-load switch, overhead transmission line, cable line and load.
4. power distribution network reactive Voltage Optimum method according to claim 1 and 2 is characterized in that, the step that described trend is calculated comprises:
According to the characteristics of power distribution network, the computation model of transformer, circuit, load is carried out the suitability operation, and introduce the computation model of distributed power source;
Set up load preassignment model, the power of 10kV outlet side is distributed, make the power data of power distribution network electricity consumption side complete;
To the operation of unlinking of the weak ring of power distribution network;
Push back before the utilization for method, carry out the trend computing, the trend of obtaining each node distributes and information of voltage, in conjunction with the voltage fluctuation data of 10kV outlet side, obtains the voltage fluctuation data of the whole network, rate of qualified voltage and the line loss of statistics the whole network.
5. power distribution network reactive Voltage Optimum method according to claim 1 and 2 is characterized in that, described idle work optimization management tool comprises: section management tool, idle work optimization scheme are determined instrument and equipment operation management instrument.
6. a power distribution network reactive Voltage Optimum system is characterized in that, comprising:
Model is built the unit, is used for based on power distribution network basic data, voltage and idle service data, builds power distribution network actual motion model;
The quality of voltage analytic unit is used for utilizing trend to calculate, and analyzes medium-voltage line and the distribution net platform region quality of voltage of described power distribution network actual motion model;
Prioritization scheme is formulated the unit, is used for medium-voltage line and distribution net platform region quality of voltage according to described power distribution network actual motion model, uses the idle work optimization management tool, formulates the reactive Voltage Optimum scheme of power distribution network;
Described prioritization scheme is checked and adjusted to the prioritization scheme adjustment unit for the method for utilizing simulation analysis;
Prioritization scheme is implemented the unit, is used for according to the described prioritization scheme after adjusting power distribution network being carried out reactive Voltage Optimum.
7. power distribution network reactive Voltage Optimum as claimed in claim 6 system is characterized in that the described basic data of power distribution network comprises:
110kV, 35kV transformer station topology information;
Substation transformer gear, capacity, outfit reactive capability information;
Transformer station's outlet current curve data;
Substation bus bar voltage fluctuation situation;
10kV circuit geographic information data;
The 10kV capacity of distribution transform;
Distribution transformer capacity, actual motion current curve, idle configuration information;
The distribute-electricity transformer district topology information.
8. as claim 6 or 7 described power distribution network reactive Voltage Optimum systems, it is characterized in that described model is built the unit and comprised:
The pel describing module is used for utilizing the SVG structure to create all kinds of pels and describes;
Topological structure is set up module, is used for utilizing the CIM model to set up the power distribution network topological structure;
The device model describing module for the descriptive model of setting up various kinds of equipment, forms power distribution network actual motion model, and described various kinds of equipment comprises transformer, on-load switch, overhead transmission line, cable line and load.
9. according to claim 6 or 7 described power distribution network reactive Voltage Optimum systems, it is characterized in that described quality of voltage analytic unit comprises the trend computing module, described trend computing module comprises:
The model adaptation module is used for the characteristics according to power distribution network, the computation model of transformer, circuit, load is carried out the suitability operation, and introduce the computation model of distributed power source;
Load model is set up module, be used for to set up load preassignment model, and the power of 10kV outlet side is distributed, and makes the power data of power distribution network electricity consumption side complete;
The weak ring module of unlinking is used for the operation of unlinking of weak ring to power distribution network;
The voltage fluctuation analysis module pushes back for method before being used for utilizing, and carries out the trend computing, the trend of obtaining each node distributes and information of voltage, in conjunction with the voltage fluctuation data of 10kV outlet side, obtain the voltage fluctuation data of the whole network, rate of qualified voltage and the line loss of statistics the whole network.
10. according to claim 6 or 7 described power distribution network reactive Voltage Optimum systems, it is characterized in that described idle work optimization management tool comprises: section management tool, idle work optimization scheme are determined instrument and equipment operation management instrument.
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