CN104899691B - A kind of method of the determining schedulable capacity of scale electric car - Google Patents
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Abstract
The present invention relates to a kind of methods of determining schedulable capacity of scale electric car, comprising: (1) defines the matrix of characterization electric car controllability and initialized and set the schedulable capacity duration of electric car；(2) current information of each electric car is obtained based on real-time status；(3) judged according to controllability of the current information of the duration and electric car to electric car；(4) assignment is carried out to the matrix of the definition characterization electric car controllability according to the actual situation；(5) controllability of the matrix to the definition characterization electric car controllability and the electric car calculates the schedulable capacity of electric car and exports according to the actual situation.Technical solution of the present invention preferably realizes electric car and interacts with the close friend of power grid.
Description
Technical field:
The present invention relates to electric car fields, are more particularly to a kind of side of determining schedulable capacity of scale electric car
Method.
Background technique:
Currently, more and more people begin to focus on and explore such as with the deterioration increasingly of energy crisis and environmental problem
What is just able to achieve the mode of sustainable development with environment harmonious coexistence.There is investigation to find, currently, transportation occupies
The about consumption of petroleum of whole world half, and the greenhouse gas emissions in the almost whole world 15% are brought, to the ring of All Around The World
Border climate change produces tremendous influence.Electric car replaces petroleum as its major impetus energy using electric power, has carbon row
The features such as loweing, is environmental-friendly in alleviating energy crisis, makes full use of renewable energy, reduces greenhouse gas emission, promote people
The advantage that class and environment harmonious development etc. have traditional combustion engine automobile incomparable.Under the promotion of enterprise, it also by
Gradually become the strategic industry direction that each Main Auto manufacturing power government, the world determines.
But electric car should be able to meet the trip requirements of user as a kind of vehicles first, need to study
The controllability of electric car, i.e., the auxiliary power grid after meeting user demand, the corresponding capacity of controllable electric automobile are to assist
The controllable capacity of power grid.In order to realize that electric car is interacted with the close friend of power grid, needing to calculate scale electric car can
The schedulable amount of capacity provided for power grid.
Summary of the invention:
The object of the present invention is to provide a kind of methods of determining schedulable capacity of scale electric car, preferably realize
Electric car is interacted with the close friend of power grid.
To achieve the above object, the invention adopts the following technical scheme: a kind of determining schedulable appearance of scale electric car
The method of amount, includes the following steps:
(1) it defines the matrix of characterization electric car controllability and is initialized and set the schedulable capacity of electric car and hold
Continuous duration；
(2) current information of each electric car is obtained based on real-time status；
(3) judged according to controllability of the current information of the duration and electric car to electric car；
(4) assignment is carried out to the matrix of the definition characterization electric car controllability according to the actual situation；
(5) according to the actual situation to it is described definition characterization electric car controllability matrix and the electric car it is controllable
Property calculate the schedulable capacity of electric car and export；
In the step (1), the matrix of the controllability includes defining matrix Yd, and define matrix Yu；Shown definition
Matrix Yd indicates load resectability；
Yd=[yd1 yd2 ... ydi ... ydN-1 ydN] (1)
In formula, ydi=1, it indicates that i-th electric car can stop charging according to grid side demand, can be used to do
Lower load；ydi=0, indicate that i-th electric car is uncontrollable or is not useable for doing downward load；To Yd matrix assign zero with
It is initialized；
The definition matrix Yu characterizes load increase property；
Yu=[yu1 yu2 ... yui ... yuN-1 yuN] (2)
In formula, yui=1, it indicates that i-th electric car can charge according to grid side demand, can be used to do
Raise load；yui=0, indicate that i-th electric car is uncontrollable or is not useable for doing up-regulation load；To Yu matrix assign zero with
It is initialized；
In the step (2), when the current information of the electric car includes electric car estimated time of departure, leaves
Expected energy, current time electricity, charge power and batteries of electric automobile capacity；
The judgement of electric car controllability in the step (3) includes that grid-connected criterion and user's charge requirement criterion carry out
Judgement；
In the step (4), to the matrix progress of characterization electric car controllability, assignment, judgement can again according to the actual situation
Charged state of the electric car at current time is controlled, then indicates that the electric car needs according to power grid and stopped if it is charged state
It only charges, as load can be lowered, enables ydi=1；If grid-connected but do not charge, the electric car is according to power grid needs
And charge, as load can be raised, enable yui=1；And it is unsatisfactory for the other amounts yd of above-mentioned conditioni=0, yui=0；
In the step (5), it is calculate by the following formula the schedulable amount of capacity of scale electric car:
Calculation of capacity formula can be raised
Calculation of capacity formula can be lowered
Wherein, yuiAnd ydiFor the matrix for characterizing electric car controllability, PCiFor the charge power of electric car.
In the step (1), the schedulable capacity duration of electric car is according to different application settings.
The grid-connected criterion such as following formula (3):
t0≤t≤td-Δt (3)
In formula: t0For electric car grid-connected moment, tdFor the electric car off-network moment, Δ t is the schedulable capacity of electric car
Lasting duration；If the criterion is invalid, indicate that electric car does not access power grid or leaves electricity within following Δ t time
Net is uncontrollable；It indicates that electric car is persistently connected to the grid in current time t to t+ Δ t if setting up in the criterion, meets
Grid-connected criterion, controllability are further judged by charging requirement criterion.
The charging requirement criterion is as follows:
In formula:For the Expected energy of user,For the current electric quantity of batteries of electric automobile, tdFor electronic vapour
Vehicle off-network moment, Δ t are the lasting duration of the schedulable capacity of electric car, PCiFor the charge power of electric car, η is charging effect
Rate, CiIndicate battery capacity；
Formula (4) indicates not charge in current time t to moment t+ Δ t when electric car, and since moment t+ Δ t
Until automobile departure time tdIt is carried out continuously charging, if met the needs of users when leaving, then it is assumed that electric car is from working as
Allow to be removed in preceding moment t to t+ Δ t, which is controllable；If cannot be met the needs of users when leaving,
Then illustrate that during this period of time, electric car must charge since sometime, is uncontrollable.
Compared with the nearest prior art, the technical scheme provide by that invention has the following excellent effect
1, can technical solution of the present invention it is controllable to propose a kind of judgement electric car to meet user demand as criterion
The scheme of property；
2, it can be power grid that technical solution of the present invention, which calculates the electric car in the case where meeting user's primary demand,
The amount of capacity of offer；
3, technical solution of the present invention can calculate the schedulable capacity of different durations, to be applied to different fields
It closes；
4, technical solution of the present invention is for realizing that the optimal coordinated control of scale electric car and power grid has future
Important practical significance；
5, technical solution of the present invention can not only provide the ancillary services such as peak-frequency regulation, spinning reserve for power grid, improve
Unit utilization rate guarantees the safety and reliability of operation of power networks；
6, technical solution of the present invention realizes the coordinated control of electric car and renewable energy, and improving power grid consumption can be again
The ability of the raw energy, improves the economy of operation of power networks.
Detailed description of the invention
Fig. 1 is the method flow diagram that technical solution of the present invention provides；
Fig. 2 is the grid-connected criterion schematic diagram of electric car controllability provided in the embodiment of the present invention；
Fig. 3 is the schedulable capacity curve figure of scale electric car provided in the embodiment of the present invention.
Specific embodiment
Below with reference to embodiment, the invention will be described in further detail.
Embodiment 1:
The invention of this example provides a kind of method of determining schedulable capacity of scale electric car, is for electric car
The traffic control that power grid is participated in as a kind of controllability load, proposes a kind of calculating side of schedulable capacity of scale electric car
Method.This method is based on electric car real time charging status data, specifically includes current time electricity, estimated time of departure, expectation
Can the information such as electricity, charge power, battery capacity judge the controllability of electric car to meet user demand as criterion, can
Control is that can be controlled the charged state of electric car according to the demand of grid side.It is filled according to controllable electric automobile is current
Schedulable capacity is divided into upper capacitance-adjustable and lower capacitance-adjustable by electricity condition.This method can calculate different durations simultaneously
Schedulable capacity, to be applied to different occasions.This method is for realizing that the optimization of scale electric car and power grid is assisted future
Regulation fixture has important practical significance.
As shown in Figure 1, the method includes following steps:
Step 1: definition characterizes the matrix of electric car controllability and is initialized.Define matrix Yd (ydi=1/0),
Indicate load resectability；And define matrix Yu (yui=1/0) load increase property, is characterized, two matrixes are carried out just respectively
Beginningization enables Yd=0, Yu=0.According to different application demands, the schedulable capacity duration Δ t of electric car is set, respectively
Take Δ t=0, Δ t=0.5, Δ t=1, the corresponding schedulable amount of capacity of more different durations.
Step 2: obtaining the current information of each electric car based on real-time status.The current information packet of electric car
Expected energy, current time electricity, charge power, batteries of electric automobile when including electric car estimated time of departure, leaving hold
The acquisition of amount etc., above- mentioned information is needed by intelligence instrument, communication apparatus etc. as support.For analogue simulation, according to related text
Guidance is offered, the above-mentioned data of electric car are obtained by the method for data fitting sampling.Specially grid-connected time t0Obedience N (19,
1.2) normal distribution, time departure tdThe normal distribution of N (7.5,0.5) is obeyed, starting electricity obeys the normal state of N (40,15)
Distribution, Expected energy are uniformly set asCharge power PcBeing uniformly distributed for U (3,4) is obeyed, it is single
Position is kW, and battery capacity is uniformly set as C=60kWh, and electric car charge efficiency is uniformly set as η=90%, electric car
Scale is set as N=1000.To stabilize the fluctuation of power distribution network total load for target, the charging schedules of each electric car are obtained,
And then the electricity at each electric car each moment can be calculated
Step 3: the information data current according to electric car, judges its controllability, electric car controllability
Criterion mainly includes grid-connected criterion and user's charge requirement criterion.
1) grid-connected criterion:
t0≤t≤td-Δt (1)
If the criterion is invalid, indicate that electric car does not access power grid or leaves power grid within following Δ t time,
It is as uncontrollable.It indicates that electric car is persistently connected to the grid in current time t to t+ Δ t if setting up in the criterion, meets
Grid-connected criterion, controllability are further judged by charging requirement criterion.
2) charging requirement criterion:
Formula (2) indicates not charge in current time t to moment t+ Δ t when electric car, and since moment t+ Δ t
Until automobile departure time tdIt is carried out continuously charging, if can satisfy the demand of user when leaving, then it is assumed that electric car
Allow to be removed in Δ t from current time t to t+, i.e., the electric car is controllable.On the contrary, if not being able to satisfy when leaving
The demand of user then illustrates that during this period of time, electric car must charge since sometime, as uncontrollable.
Step 4: carrying out assignment again to the matrix of characterization electric car controllability according to the actual situation.Judge controllable electric
Charged state of the automobile at current time then indicates that the electric car can need according to power grid and be stopped if it is charged state
Charging enables yd that is, as that can lower loadi=1；If grid-connected but do not charge, which can be according to power grid
It needs and charges, i.e., as load can be raised, enable yui=1.And it is unsatisfactory for the other amounts yd of above-mentioned conditioni=0, yui=
0。
Step 5: the schedulable amount of capacity of calculation scale electric car simultaneously exports according to the controllability of electric car
As a result, this example calculates the schedulable amount of capacity at each integral point moment.
Fig. 2 is the grid-connected criterion schematic diagram of electric car controllability, certain electric car simulated in the embodiment of the present invention
Design parameter and one day status data of this electric car respectively such as Tables 1 and 2:
Table 1
| Battery capacity (kWh) | 60 |
| Charge power (kW) | 4 |
| The grid-connected time | 20 |
| The off-network time | 7 |
| It originates SOC (100%) | 42 |
| User demand SOC (100%) | >80 |
| It can be calculated the charging time (h) at least needed | 6 |
| SOC (100%) when leaving | 82 |
Table 2
Fig. 3 is schedulable capacity curve figure in scale electric car one day, each integral point moment in the embodiment of the present invention
The load capacity size that electric car can raise is shown in Table 3, and the load capacity that can be lowered is shown in Table 4:
Table 3
Table 4
As can be seen from tables 3 and 4 that due to it is different at the time of electric car controllability will change, advise
The schedulable capacity of modelling electric car also can constantly change at any time.And at grid-connected initial stage, as electric car is grid-connected
Quantity is continuously increased, and schedulable capacity is also continuously increased.But in grid-connected latter stage, in order to meet the electricity need of user
It asks, the controllability of electric car is deteriorated, therefore schedulable capacity is also reduced therewith.
It can also be seen that the schedulable capacity of different durations is not also identical, the reason is that required lasting in synchronization
Time is longer, and the controllability of electric car is poorer, therefore schedulable capacity can reduce with the increase of duration.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field is although should be understood with reference to the above embodiments: still can be to a specific embodiment of the invention
It is modified or replaced equivalently, these are without departing from any modification of spirit and scope of the invention or equivalent replacement, in Shen
Within claims of the invention that please be pending.
Claims (2)
1. a kind of method of the determining schedulable capacity of scale electric car, it is characterised in that: include the following steps:
(1) when defining the matrix of characterization electric car controllability and being initialized and set the schedulable capacity of electric car persistently
It is long；
(2) current information of each electric car is obtained based on real-time status；
(3) judged according to controllability of the current information of the duration and electric car to electric car；
(4) assignment is carried out to the matrix of the definition characterization electric car controllability according to the actual situation；
(5) matrix of electric car controllability and the controllability meter of the electric car are characterized to the definition according to the actual situation
It calculates the schedulable capacity of electric car and exports；
In the step (1), the matrix of the controllability includes defining matrix Yd, and define matrix Yu；Shown definition matrix Yd,
Indicate load resectability；
Yd=[yd1 yd2 ... ydi ... ydN-1 ydN] (1)
In formula, ydi=1, it indicates that i-th electric car can stop charging according to grid side demand, it is negative to can be used for doing downward
Lotus；ydi=0, indicate that i-th electric car is uncontrollable or is not useable for doing downward load；Zero is assigned to carry out just to Yd matrix
Beginningization；
The definition matrix Yu characterizes load increase property；
Yu=[yu1 yu2 ... yui ... yuN-1 yuN] (2)
In formula, yui=1, it indicates that i-th electric car can charge according to grid side demand, it is negative to can be used for doing up-regulation
Lotus；yui=0, indicate that i-th electric car is uncontrollable or is not useable for doing up-regulation load；Zero is assigned to carry out just to Yu matrix
Beginningization；
Expectation in the step (2), when the current information of the electric car includes electric car estimated time of departure, leaves
Electricity, current time electricity, charge power and batteries of electric automobile capacity；
The judgement of electric car controllability in the step (3) includes that grid-connected criterion and user's charge requirement criterion are sentenced
It is disconnected；
The grid-connected criterion such as following formula (3):
t0≤t≤td-Δt (3)
In formula: t0For electric car grid-connected moment, tdFor the electric car off-network moment, Δ t continues for the schedulable capacity of electric car
Duration；
If the criterion is invalid, indicate that electric car does not access power grid or leaves power grid within following Δ t time, for not
Controllably；
It indicates that electric car is persistently connected to the grid in current time t to t+ Δ t if setting up in the criterion, meets and grid-connected sentence
According to controllability is further judged by charging requirement criterion；
User's charge requirement criterion is as follows:
In formula:For the Expected energy of user,For the current electric quantity of batteries of electric automobile, tdFor electric car from
It nets the moment, Δ t is the lasting duration of the schedulable capacity of electric car, PCiFor the charge power of electric car, η is charge efficiency,
CiIndicate battery capacity；
Formula (4) indicates not charged in current time t to moment t+ Δ t when electric car, and since moment t+ Δ t up to
Automobile departure time tdIt is carried out continuously charging；
If met the needs of users when leaving, then it is assumed that electric car allows to be removed from current time t to t+ in Δ t,
The electric car is controllable；
If cannot be met the needs of users when leaving, illustrate during this period of time, the electric car since sometime
It must charge, be uncontrollable；
In the step (4), assignment again is carried out to the matrix of characterization electric car controllability according to the actual situation, judges controllable electric
Charged state of the electrical automobile at current time then indicates that the electric car needs according to power grid and stops filling if it is charged state
Electricity enables yd as that can lower loadi=1；If grid-connected but do not charge, the electric car according to power grid need and into
Row charging, as that can raise load, enables yui=1；And it is unsatisfactory for the other amounts yd of above-mentioned conditioni=0, yui=0；
In the step (5), it is calculate by the following formula the schedulable amount of capacity of scale electric car:
Calculation of capacity formula can be raised
Calculation of capacity formula can be lowered
Wherein, yuiAnd ydiFor the matrix for characterizing electric car controllability, PCiFor the charge power of electric car.
2. a kind of method of the determining schedulable capacity of scale electric car as described in claim 1, it is characterised in that: in institute
It states in step (1), the schedulable capacity duration of electric car is according to different application settings.
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| CN105553057B (en) * | 2015-12-22 | 2018-06-12 | 华中科技大学 | A kind of electric automobile charging station control system based on electric network protection |
| CN106203720B (en) * | 2016-07-15 | 2019-06-14 | 合肥工业大学 | A kind of schedulable capacity prediction methods of Multiple Time Scales electric car cluster |
| CN107367285B (en) * | 2017-05-23 | 2020-04-10 | 西安交通大学 | Pure electric bus running route planning method based on battery capacity decline and workload reverse order matching |
| CN109861208B (en) * | 2019-01-07 | 2020-09-01 | 南京工程学院 | Electric vehicle grid-connected optimization scheduling method based on two-stage preprocessing strategy |
| CN110525259B (en) * | 2019-07-23 | 2021-06-08 | 广东电网有限责任公司广州供电局 | Charging demand response method and device for electric automobile and computer equipment |
| CN111564852B (en) * | 2020-03-25 | 2021-10-08 | 上海电力大学 | Frequency control method and device for hybrid power system comprising electric automobile |
| CN112926818A (en) * | 2020-12-11 | 2021-06-08 | 天津大学 | Electric vehicle demand response capability assessment method based on user demand relaxation degree |
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