CN108039722A - A kind of distribution type renewable energy system Optimal Configuration Method suitable for alternating current-direct current mixing - Google Patents
A kind of distribution type renewable energy system Optimal Configuration Method suitable for alternating current-direct current mixing Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Abstract
The invention discloses a kind of distribution type renewable energy system Optimal Configuration Method suitable for alternating current-direct current mixing, include the following steps：(1) topological structure of AC/DC network is determined；(2) setting model parameter；(3) each element operation constraints of initialization system；(4) assumed load and its method for operation；(5) running situation is set；(6) system optimization target is selected；(7) single goal or multi-objective Algorithm solving-optimizing allocation plan are used.The present invention solve comprising multiple renewable energy sources, multiple voltage grade, supply of cooling, heating and electrical powers Ac/dc Power Systems complex optimization allocation problem, optimization aim variation, multiple object functions can be selected to optimize system configuration as needed, and the operating condition of system is taken into full account, including synchronizing mode, regenerative resource access constraint, regenerative resource subsidy form, Demand Side Response mode etc., it disclosure satisfy that the configuration needs of different system, there is preferable applicability and feasibility.
Description
Technical field
The present invention relates to distributed energy technical field, and in particular to a kind of distribution suitable for alternating current-direct current mixing can be again
Raw energy resource system Optimal Configuration Method.
Background technology
As the broad sense direct current energy equipment ratio using convertible frequency air-conditioner, the load of IT classes and electric automobile as representative quickly increases
Long, distribution type renewable energy is fast-developing, and alternating current-direct current unsteady flow link is more in conventional AC distribution, loss is high, flexible with electricity consumption
The problems such as property is poor is increasingly protruded.It is to solve the problems, such as these important means to match somebody with somebody multiplexe electric technology using alternating current-direct current mixing.And use and hand over
The distribution type renewable energy system of direct current hybrid technology is then the development trend in distributed power generation future.Distributed type renewable energy
Distributing rationally for source system is that system is safe and reliable, premise of economical operation, domestic and international scientific research institution from economy, reliability,
Feature of environmental protection etc. considers Optimal Configuration Method, and Research on configuration is optimized for the micro-capacitance sensor containing light storage or wind-light storage.This
A little Optimal Configuration Methods are generally directed to individual system, and the consideration existed to running situation is insufficient, causes method
The problems such as applicability, relatively low feasibility.In addition, for generating electricity containing distribution type renewable energy, the alternating current-direct current of multi-voltage grade
Distributing rationally for hybrid system lacks correlative study.
The content of the invention
It is an object of the invention to provide a kind of distribution type renewable energy system optimization suitable for alternating current-direct current mixing to match somebody with somebody
Method is put, to meet a variety of workload demands in alternating current-direct current combined hybrid system, improves the reliability, economy, the feature of environmental protection of system operation,
Single goal and Multipurpose Optimal Method can be used according to user demand, it is excellent to provide various energy resources complementation for systems organization and dilatation
Change allocation plan.
To achieve the above object, the present invention adopts the technical scheme that：
A kind of distribution type renewable energy system Optimal Configuration Method suitable for alternating current-direct current mixing, includes the following steps：
(1) the topological structure setting of AC/DC network, determines each voltage class and its connection mode；
(2) model parameter is set, including system equipment technical parameter and cost parameter, geographical location, lifetime of system, is passed through
Setup parameter forms system element model；
(3) each element operation constraints of initialization system；
(4) assumed load and its method for operation；
(5) setting running situation, including grid-connected reflux type, system running policy, regenerative resource subsidy form,
Electricity price scheme, regenerative resource grid-connected voltage level restriction, renewable energy power generation amount accounting and installation constraint based on sites；
(6) select system optimization target, including the chemical conversion of life cycle cost in terms of economy, standard of energy this, it is net existing
It is worth, load short of electricity probability, electricity shortage desired value in terms of reliability, and the CO in terms of the feature of environmental protection2Discharge capacity, contain energy
Amount；
(7) using single goal or multi-objective Algorithm solving-optimizing configuration object function, configuration scheme is provided.
In step (1), by setting the busbar voltage of alternating current and direct current, select between each busbar voltage and system and electricity
The connection relation of net, determines network topology, and plurality of busbar voltage can be connected by multiport electric power electric transformer.
In step (2), system equipment includes power converter apparatus, transformer, storing up electricity and heat accumulation equipment, heat utilization conversion is set
It is standby, wherein, power converter apparatus include photovoltaic system, wind-driven generator, solar-thermal generating system, diesel-driven generator, gas turbine,
Electric power electric transformer；By set geographical position acquisition whole year by when solar irradiation, wind speed and temperature.
In step (3), each element operation constraints of system includes energy storage discharge and recharge constraint and generator output constrains.
In step (4), load includes cold and hot electric load；Load setting method includes 3 kinds：The first is according to typical load
Set, including industrial load, Commercial Load, residential loads, it is special according to load by inputting average load or peak load
Property the annual load of generation；Second is that load is configured according to seasonality, and sets certain fluctuation, inputs average load
Or annual load is generated after peak load；The third is the annual payload of direct setting；The method of operation of load includes controllable
Mode, uncontrollable mode, have Demand Side Response mode, if the Demand Side Response method of operation, then may be set to based on excitation
Demand Side Response and Demand Side Response based on electricity price, the Demand Side Response based on excitation is, it is necessary to set user response participation
Degree, load constraint and exiting form, the Demand Side Response based on electricity price, it is necessary to set user response participation, load constraint and
Electricity price form.
In step (5), system and the operation relation of power grid are determined by setting grid-connected reflux type；Transported by initialization system
Each element running priority order in row policy determination system；Regenerative resource subsidy shape is set to accurately reflect the economy of system
Formula and electricity price scheme；To improve the feasibility of configuration scheme, it is necessary to set regenerative resource grid-connected voltage level restriction, and
It is arranged as required to renewable energy power generation amount accounting and installation constraint based on sites.
In step (6), according to system configuration demand set optimization aim, including economy in terms of life cycle cost,
Standard of energy chemical conversion this, net present value (NPV), load short of electricity probability, electricity shortage desired value in terms of reliability, and in terms of the feature of environmental protection
CO2Discharge capacity, contain energy.
In step (7), if existing system dilatation, then fixed equipment installed capacity in first setting system is needed；If
Planned for new system, then device type and the capacity search range of configuration to be optimized are directly determined according to load；If multiple target
Optimization, then solve the optimal forward positions of Pareto of multiple objective function using the genetic algorithm of the non-dominated ranking with elitism strategy, obtain
To Pareto optimal solutions, configuration scheme is finally provided.
Compared with prior art, the present invention has the following advantages：
1. the present invention solves the alternating current-direct current mixing comprising multiple renewable energy sources, multiple voltage grade, supply of cooling, heating and electrical powers
The complex optimization allocation problem of system.
2. optimization aim variation of the present invention, including the plurality of target such as economy, reliability, feature of environmental protection, can be according to need
Multiple object functions are selected to optimize system configuration.
3. the present invention has taken into full account a variety of situations of system operation, including synchronizing mode, grid-connected reflux type, system fortune
Row strategy, regenerative resource subsidy form, electricity price scheme, Demand Side Response mode, renewable energy power generation amount accounting and installation
Constraint based on sites, disclosure satisfy that the configuration needs of different system, have higher feasibility.
Brief description of the drawings
Fig. 1 is present invention method flow chart；
Fig. 2 is system construction drawing of the embodiment of the present invention；
Fig. 3 is AC load year of embodiment of the present invention change curve；
Fig. 4 is DC load year of embodiment of the present invention change curve.
Embodiment
To make the objects, technical solutions and advantages of the present invention clearer, clear and definite, below in conjunction with the accompanying drawings and specific embodiment party
Formula is described in further details present disclosure.It is understood that specific embodiment described herein is used only for
Explain the present invention, rather than limitation of the invention.It also should be noted that for the ease of describing, illustrate only in attached drawing
Part related to the present invention rather than full content.
It is an object of the invention to provide a kind of distribution type renewable energy system optimization suitable for alternating current-direct current mixing to match somebody with somebody
Method is put, this method is suitable for the distribution type renewable energy system of alternating current-direct current mixing, has taken into full account current such system
Operating condition and all kinds of optimizing index, to meet the configuration needs of different system, improve the applicability of Optimal Configuration Method.Here
Illustrated by taking the low-voltage AC/DC combined hybrid system for living scene of handling official business as an example.
As shown in Figure 1, a kind of distribution type renewable energy system suitable for alternating current-direct current mixing of the embodiment of the present invention is excellent
Change collocation method, comprise the following steps：
(1) the topological structure setting of AC/DC network, determines each voltage class and its connection mode；
(2) model parameter is set, including system equipment technical parameter and cost parameter, geographical location, lifetime of system etc., is led to
Cross setup parameter and form system element model；
(3) each element operation constraints of initialization system；
(4) assumed load and its method for operation；
(5) setting running situation, including grid-connected reflux type, system running policy, regenerative resource subsidy form,
Electricity price scheme, regenerative resource grid-connected voltage level restriction, renewable energy power generation amount accounting and installation constraint based on sites etc.；
(6) select system optimization target, including the chemical conversion of life cycle cost in terms of economy, standard of energy this, it is net existing
It is worth, load short of electricity probability, electricity shortage desired value in terms of reliability, and the CO in terms of the feature of environmental protection2Discharge capacity, contain energy
Amount；
(7) using single goal or multi-objective Algorithm solving-optimizing configuration object function, configuration scheme is provided.
The specific implementation step of the method for the present invention for convenience of description, above method specific embodiment are as follows：
(1) the topological structure setting of AC/DC network, sets the busbar voltage of alternating current and direct current, selects each busbar voltage
Between and system and the connection relation of power grid, determine network topology, as shown in Figure 2.
(2) model parameter is set, and selection system equipment is photovoltaic system, wind-driven generator, solar-thermal generating system, energy storage are electric
Pond and its converter, the current transformer for connecting low-voltage AC/DC network, transformer etc., geographical location be arranged to Pearl River Delta area certain
City, by the meteorological data of 1991~2010 years by interpolation method obtain system location 1 year 8760 it is small when total solar radiation amount
And wind speed.
(3) each element operation constraints of system is set, DEFAULT constraint includes power-balance constraint and power supply units limits,
, it is necessary to which the constraints set constrains for energy storage, energy storage constraints has grid-connected alternating current-direct current combined hybrid system for the present embodiment
Body is as follows：
SOC charge conditions will meet：
SOC≥SOCmin
Charge-discharge electric power should meet：
Wherein, P+It is respectively the charge-discharge electric power in the unit interval with P-.
(4) assumed load and its method for operation, here account for refrigeration duty directly as electric load, and load classification is such as
Shown in table 1.
1 load classification of table
Using second of load set-up mode, load is configured and is set certain according to seasonal and part throttle characteristics
Fluctuation, generates annual load, AC load is as shown in figure 3, DC load is as shown in Figure 4 after inputting peak load.Load operation
Mode is uncontrollable mode.
(5) initialization system operating condition, initialization system for it is grid-connected, can not adverse current, tou power price price.According to energy storage degree electricity
The relation of cost and tou power price, formulating system running policy is：When generation of electricity by new energy amount cannot meet load, electricity price during paddy
When directly from power grid power purchase, and for storage battery charge；During peak and usually preferential battery discharging during electricity price, when storage battery SOC drops
To the SOC of settingminShi Gaiwei is to power grid power purchase.Charge when generation of electricity by new energy amount overloads for storage battery, when storage battery fills
Unnecessary generation of electricity by new energy amount discards after full electricity.Set regenerative resource and subsidize form as electricity price subsidy, renewable energy power generation
It is 0%~100% to measure accounting, and regenerative resource grid-connected voltage level restriction is as shown in table 2.
2 regenerative resource grid-connected voltage class requirement of table
| Scale of the project | Access voltage class |
| 8kW | 220V |
| 8-40kW | 380V |
| 400-6000kW | 10kV |
| 5000-30000kW | 35kV |
(6) system optimization target is selected, it is optimization aim to choose life cycle cost here, and life cycle cost is by system
Initial outlay cost, the present worth summation of the cost of more exchange device and operation expense.Life cycle cost is：
LCC=Cinv+Com×k1+Crep×k2+Cg-Bsub1×k1-Bsub2×k3
Wherein, CinvFor initial outlay cost；ComFor the operation expense of each year；CrepFor storage battery replacement cost；
CgThe cost of electricity is bought from power grid for alternating current-direct current combined hybrid system；Bsub1For photovoltaic generation public subsidies；Bsub2Mended for photovoltaic generation provinces and cities
Patch；k1For 20 years conversion factors (systems life cycle is arranged to 20 years), the cost of each year is converted to First Year, with discount
Rate is related；k2For storage battery replacement cost conversion factor, storage battery replacement cost is converted to First Year, it is related with discount rate；k3
Conversion factor is subsidized for the photovoltaic generation flourishing age, First Year is arrived into subsidy conversion, it is related with subsidy time and discount rate.
(7) object function is solved using single objective genetic algorithm, the present embodiment is planned for new system, determines to treat according to load
The capacity for the equipment (photovoltaic generating system, wind generator system, energy-storage system, AC-DC converter, transformer) distributed rationally is searched
Rope scope.When not having renewable energy power generation in system, only being powered by power grid, the life cycle cost of system is 3842.6 ten thousand
Member, regenerative resource ratio are 0%.
The allocation optimum of system is as shown in table 3 when renewable energy power generation ratio is 0%~100%
The system optimal that 3 regenerative resource ratio of table is 0%~100% configures
| Wind turbine/platform | 0 |
| Meet photovoltaic cell/kWp of 10kV exchanges | 1879 |
| Meet photovoltaic cell/kWp of 380V exchanges | 400 |
| Meet photovoltaic cell/kWp of ± 375V direct currents | 400 |
| Storage battery/kWh | 3227 |
| AC-DC converter capacity/kW | 750 |
| Photovoltaic step-up transformer capacity/kVA | 1600 |
| Ten thousand yuan of totle drilling cost LCC/ | 2289 |
| Generation of electricity by new energy ratio | 72.57% |
Above-described embodiment is in the art the purpose is to be to allow simply to illustrate that the technical concepts and features of the present invention
Those of ordinary skill can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all
It is the equivalent change or modification that the essence of content according to the present invention is made, should all covers within the scope of the present invention.
Claims (8)
- A kind of 1. distribution type renewable energy system Optimal Configuration Method suitable for alternating current-direct current mixing, it is characterised in that including Following steps：(1) the topological structure setting of AC/DC network, determines each voltage class and its connection mode；(2) model parameter is set, including system equipment technical parameter and cost parameter, geographical location, lifetime of system, passes through setting Parameter forms system element model；(3) each element operation constraints of initialization system；(4) assumed load and its method for operation；(5) running situation, including grid-connected reflux type, system running policy, regenerative resource subsidy form, electricity price are set Scheme, regenerative resource grid-connected voltage level restriction, renewable energy power generation amount accounting and installation constraint based on sites；(6) select system optimization target, including the chemical conversion of life cycle cost in terms of economy, standard of energy this, net present value (NPV), can By the load short of electricity probability in terms of property, electricity shortage desired value, and the CO in terms of the feature of environmental protection2Discharge capacity, contain energy；(7) using single goal or multi-objective Algorithm solving-optimizing configuration object function, configuration scheme is provided.
- 2. the distribution type renewable energy system Optimal Configuration Method according to claim 1 suitable for alternating current-direct current mixing, It is characterized in that：In step (1), by setting the busbar voltage of alternating current and direct current, select between each busbar voltage and system with The connection relation of power grid, determines network topology, and plurality of busbar voltage can be connected by multiport electric power electric transformer.
- 3. the distribution type renewable energy system Optimal Configuration Method according to claim 1 suitable for alternating current-direct current mixing, It is characterized in that：In step (2), system equipment includes power converter apparatus, transformer, storing up electricity and heat accumulation equipment, heat utilization turns Change equipment, wherein, power converter apparatus includes photovoltaic system, wind-driven generator, solar-thermal generating system, diesel-driven generator, combustion gas Turbine, electric power electric transformer；By set geographical position acquisition whole year by when solar irradiation, wind speed and temperature.
- 4. the distribution type renewable energy system Optimal Configuration Method according to claim 1 suitable for alternating current-direct current mixing, It is characterized in that：In step (3), each element operation constraints of system includes energy storage discharge and recharge constraint and generator output about Beam.
- 5. the distribution type renewable energy system Optimal Configuration Method according to claim 1 suitable for alternating current-direct current mixing, It is characterized in that：In step (4), load includes cold and hot electric load；Load setting method includes 3 kinds：The first is according to typical case Load is set, including industrial load, Commercial Load, residential loads, by inputting average load or peak load, according to negative The annual load of lotus characteristic generation；Second is that load is configured according to seasonality, and sets certain fluctuation, and input is average Annual load is generated after load or peak load；The third is the annual payload of direct setting；The method of operation of load includes Controlled manner, uncontrollable mode, have Demand Side Response mode, if the Demand Side Response method of operation, then may be set to be based on The Demand Side Response of excitation and the Demand Side Response based on electricity price, the Demand Side Response based on excitation is, it is necessary to set user response Participation, load constraint and exiting form, the Demand Side Response based on electricity price is, it is necessary to set user response participation, load about Beam and electricity price form.
- 6. the distribution type renewable energy system Optimal Configuration Method according to claim 1 suitable for alternating current-direct current mixing, It is characterized in that：In step (5), system and the operation relation of power grid are determined by setting grid-connected reflux type；It is by setting System operation reserve determines each element running priority order in system；Regenerative resource benefit is set to accurately reflect the economy of system Patch form and electricity price scheme；To improve the feasibility of configuration scheme, regenerative resource grid-connected voltage level restriction is set, can Renewable source of energy generation amount accounting and installation constraint based on sites.
- 7. the distribution type renewable energy system Optimal Configuration Method according to claim 1 suitable for alternating current-direct current mixing, It is characterized in that：In step (6), according to system configuration demand set optimization aim, including economy in terms of life cycle into This, standard of energy chemical conversion this, net present value (NPV), load short of electricity probability, electricity shortage desired value in terms of reliability, and feature of environmental protection side The CO in face2Discharge capacity, contain energy.
- 8. the distribution type renewable energy system Optimal Configuration Method according to claim 1 suitable for alternating current-direct current mixing, It is characterized in that：In step (7), if existing system dilatation, then fixed equipment installed capacity in first setting system is needed； Planned if new system, then device type and the capacity search range of configuration to be optimized are directly determined according to load；If more mesh Mark optimization, then solve the optimal forward positions of Pareto of multiple objective function using the genetic algorithm of the non-dominated ranking with elitism strategy, Pareto optimal solutions are obtained, finally provide configuration scheme.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108710977A (en) * | 2018-06-05 | 2018-10-26 | 东南大学 | A kind of distributing-supplying-energy system device configuration and running optimizatin design method |
| CN108959719A (en) * | 2018-06-08 | 2018-12-07 | 中国科学院电工研究所 | The distribution type renewable energy system test scene analogy method of alternating current-direct current mixing |
| CN108959719B (en) * | 2018-06-08 | 2022-04-12 | 中国科学院电工研究所 | AC-DC hybrid distributed renewable energy system test scene simulation method |
| CN109149564A (en) * | 2018-08-31 | 2019-01-04 | 国网浙江省电力有限公司经济技术研究院 | A kind of alternating current-direct current mixing power distribution network distributed generation resource Optimal Configuration Method |
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| CN110034572A (en) * | 2019-04-17 | 2019-07-19 | 中国科学院广州能源研究所 | The Ac/dc Power Systems energy storage configuration method of the electric power electric transformer containing multiport |
| CN112713621A (en) * | 2020-12-22 | 2021-04-27 | 广东电网有限责任公司电力科学研究院 | Multi-objective optimization configuration method and system for alternating current-direct current hybrid system |
| CN112821466A (en) * | 2021-01-08 | 2021-05-18 | 湖北工业大学 | Independent micro-grid capacity configuration method containing photo-thermal power generation |
| CN112821466B (en) * | 2021-01-08 | 2023-02-28 | 湖北工业大学 | Independent micro-grid capacity configuration method containing photo-thermal power generation |
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