CN109460870A - Consider the cluster electric car exchange method of obstruction - Google Patents
Consider the cluster electric car exchange method of obstruction Download PDFInfo
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Abstract
This application involves a kind of cluster electric car exchange methods for considering obstruction.The cluster electric car exchange method for considering obstruction judges whether the branch power of the branch is more than the power preset value according to the planned dispatching power, and judges whether the node voltage of each node is more than the voltage preset value.If the branch power is more than the power preset value or the node voltage is more than the voltage preset value, the congestion pricing is calculated according to the congestion pricing model.The planned dispatching power is adjusted further according to the congestion pricing.The cluster electric car exchange method for considering obstruction fully considers the branch power and the node voltage, by the way that the distributed electricity resource that is connected to the grid on a large scale is used restraint and guided, power distribution network is avoided load peak and obstruction occur.
Description
Technical field
Dispatching technique field that this application relates to power distribution systems is handed over more particularly to a kind of cluster electric car for considering obstruction
Mutual method.
Background technique
As electric car electricity system, photovoltaic generating system, energy-storage system distributed resource are shared in power distribution network
The continuous rising of ratio and the continuous propulsion of power market reform, the scale interacted between distributed resource and power distribution network and frequency
Rate is consequently increased.
The main body of active distribution network market structure is distribution system scheduling institution and charge-discharge facility operator.The distribution
Power system dispatching organisation and the charge-discharge facility operator sign charge and discharge contract, realize the charge-discharge facility operator to institute
State the control of charge-discharge facility operator charge and discharge.The charge-discharge facility operator and the terminal user sign charge and discharge and close
Together, control of the charge-discharge facility operator to terminal user's charge and discharge is realized.
Network system includes multiple nodes and the branch including the node.Electric car electricity system, photovoltaic power generation system
System, energy-storage system distributed resource are connected to the grid, and not only influence the branch power of grid branch, but also influence grid nodes
Node voltage.If distributed electricity resource throws the reins to and guides to being connected to the grid on a large scale, it is most likely that power distribution network is caused to go out
Existing load peak and obstruction, threaten to the operation of power distribution network and the electrical equipment being attached thereto.
Summary of the invention
Based on this, it is necessary to which for being connected to the grid on a large scale, distributed electricity resource throws the reins to and guides, it is most likely that
Cause power distribution network load peak and obstruction occur, asks what the operation of power distribution network and the electrical equipment being attached thereto threatened
Topic provides a kind of cluster electric car exchange method for considering obstruction.
A kind of cluster electric car exchange method considering obstruction, the power grid include multiple nodes and including the node
Branch characterized by comprising
S100, obtain multiple nodes of power grid scheduling time and the node corresponding with the scheduling time
Planned dispatching power；
S200 judges whether the branch power of the branch is more than power preset value according to the planned dispatching power, and
Whether the node voltage for judging each node is more than voltage preset value；
S300, if the branch power is more than the power preset value or the node voltage is more than that the voltage is pre-
If value, congestion pricing is calculated according to congestion pricing model.
In one embodiment, the planned dispatching power includes electric car electric power, generated output and energy storage function
Rate, the step S200 further include:
S210 obtains the base power of the node；
S220 is based on the electric car electric power, the generated output and the energy storage power, passes through node power
Formula, calculate node power,
The negative value for calculating the sum of the node power and the base power obtains node injecting power；
S230 obtains the branch power by branch power formula based on the node injecting power,
The node voltage is obtained by node voltage formula based on the node injecting power；
S240 judges whether the branch power is more than the power preset value, and judges whether the node voltage surpasses
Cross the voltage preset value.
In one embodiment, in the step S300, calculating congestion pricing according to the congestion pricing model includes:
S310 establishes the congestion pricing model；
S320 calculates the congestion pricing according to the congestion pricing model.
In one embodiment, the S320 step includes:
S321 is based on the node injecting power and the node voltage, dispatches general power formula by electricity, obtains electricity
Amount scheduling general power；
S322 seeks the electricity scheduling general power derivative of the node power, passes through deploying node formula, meter
Operator node Marginal Pricing；
S323 obtains basic electricity price, subtracts the basic electricity price using the deploying node, obtains the node resistance
Fill in electricity price.
In one embodiment, in the step S220, the node power formula are as follows:
In formula: m is that electricity dispatches subelement, and i is the node, and t is the scheduling time, PEV(m, i, t) is m electricity
Dispatch the electric car electric power of the subelement in i-node, t period, PPV,cur(m, i, t) is m electricity scheduling sublayer
The generated output of the unit in i-node, t period, PESS(m, i, t) is that m electricity dispatches subelement in i-node, t
Between the energy storage power in section, NmSubelement sum, P are dispatched for electricityaggThe institute that (i, t) is node i within t scheduling time
State node power；
The node injecting power, the node injecting power formula are calculated by the node injecting power formula are as follows:
Pinj(i, t)=- [PL(i,t)+Pagg(i,t)] (2)
In formula: PL(i, t) is the base power of the node i in the t period, Pinj(i, t) is injection of the node i in the t period
The node injecting power of power grid.
In one embodiment, in the step S230, the branch power formula are as follows:
In formula: NjFor the node total number of jth branch, PjIt (t) is the injecting power of the jth branch in the t period；
The node voltage formula are as follows:
V (i, t)=1+Pinj(i,t)Ri+Qinj(i,t)Xi (4)
In formula: Qinj(i, t) is injection reactive power of the node i in the injection power grid of t period, RiFor resistance, XiFor impedance.
In one embodiment, in the step S240, examine the branch power whether the formula of overrun are as follows:
-Pj,max≤Pj(t)≤Pj,max (5)
In formula: Fj-iDistribution factor, P are transmitted for dc powerj,maxIndicate the power preset value of branch j；
Examine the node voltage whether the formula of overrun are as follows:
Vmin≤V(i,t)≤Vmax (6)
In formula: VminFor upper limit value in the voltage preset value of node i, VmaxFor in the voltage preset value of node i
Lower limit value.
In one embodiment, in the S321 described in step, the electricity dispatches general power formula are as follows:
In formula: L is that the electricity dispatches general power, λ1And λ2For the electricity price factor related with power, μ1And μ2For with voltage
The related electricity price factor.
In one embodiment, in the S322 step, the deploying node formula are as follows:
In formula: yDLMPFor the deploying node, yconFor the congestion pricing, y is the basic electricity price.
In one embodiment, in S323 step, the Nodal congestion price formula are as follows:
The cluster electric car exchange method for considering obstruction provided by the embodiments of the present application.The collection for considering obstruction
Group's electric car exchange method judges whether the branch power of the branch is more than the power according to the planned dispatching power
Preset value, and judge whether the node voltage of each node is more than the voltage preset value.If the branch power is more than described
Power preset value or the node voltage are more than the voltage preset value, calculate the obstruction according to the congestion pricing model
Electricity price.The planned dispatching power is adjusted further according to the congestion pricing.The cluster electric car interaction side for considering obstruction
Method fully considers the branch power and the node voltage, by being subject to about to the distributed electricity resource that is connected to the grid on a large scale
Beam and guidance, avoid power distribution network from load peak and obstruction occur.
Detailed description of the invention
Fig. 1 is the flow chart of the cluster electric car exchange method blocked the considerations of offer in the application one embodiment；
Fig. 2 judges whether the branch power and the node voltage surmount limit for what is provided in the application one embodiment
The flow chart of degree；
Fig. 3 is the flow chart of the congestion pricing model provided in the application one embodiment；
Fig. 4 is the calculation flow chart of the congestion pricing model provided in the application one embodiment；
Fig. 5 is the parameter process of the cluster electric car exchange method blocked the considerations of offer in the application one embodiment
Figure；
Fig. 6 is the process for the cluster electric car exchange method operation blocked the considerations of offer in the application one embodiment
Figure；
Fig. 7 is the flow chart of the planned dispatching power distribution provided in the application one embodiment；
Fig. 8 is the parameter flow chart of the planned dispatching power distribution provided in the application one embodiment.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the application, and do not have to
In restriction the application.
Referring to Figure 1, the embodiment of the present application provides a kind of cluster electric car exchange method for considering obstruction.The power grid
Branch including multiple nodes and including the node, the cluster electric car exchange method for considering obstruction, feature exist
In, comprising:
S100, obtain multiple nodes of power grid scheduling time and the node corresponding with the scheduling time
Planned dispatching power.
S200 judges whether the branch power of the branch is more than power preset value according to the planned dispatching power, and
Whether the node voltage for judging each node is more than voltage preset value.
S300, if the branch power is more than the power preset value or the node voltage is more than that the voltage is pre-
If value, congestion pricing is calculated according to congestion pricing model.
The cluster electric car exchange method of the consideration obstruction provided in the embodiment of the present application is the distribution system
Interactive response adjusting method between scheduling institution and the charge-discharge facility operator.The electronic vapour of cluster for considering obstruction
Vehicle exchange method judges whether the branch power of the branch is more than the power preset value according to the planned dispatching power,
And judge whether the node voltage of each node is more than the voltage preset value.If the branch power is default more than the power
Value or the node voltage are more than the voltage preset value, calculate the congestion pricing according to the congestion pricing model.Root again
The planned dispatching power is adjusted according to the congestion pricing.The cluster electric car exchange method for considering obstruction can pass through
The branch power and the node voltage are regulated and controled, use restraint to the distributed electricity resource that is connected to the grid on a large scale and
Guidance, avoids power distribution network from load peak and obstruction occur.
In the step S100, the electric energy circulation power of the node in different time period is different, so second day
The planned dispatching power also at any time the difference of section and it is different.In the step S200, the branch power can be
Electric energy circulation general power of all electric terminals in the branch road within the same period.The node voltage is node place
State voltage value of the terminal user within the same period.In the step S300, the congestion pricing model can will be described
Branch power and the node voltage and the congestion pricing establish corresponding relation.The branch power is bigger, the node is electric
Pressure is bigger, and the congestion pricing is more expensive.
Please also refer to Fig. 2, in one embodiment, the planned dispatching power includes electric car electric power, hair
Electrical power and energy storage power.The step S200 further include:
S210 obtains the base power of the node.
S220 is based on the electric car electric power, the generated output and the energy storage power, passes through node power
Formula, calculate node power.
The negative value for calculating the sum of the node power and the base power obtains node injecting power.
S230 obtains the branch power by branch power formula based on the node injecting power.
The node voltage is obtained by node voltage formula based on the node injecting power.
S240 judges whether the branch power is more than the power preset value, and judges whether the node voltage surpasses
Cross the voltage preset value.
The planned dispatching power includes the electric car electric power, the generated output and the energy storage power.
The electric car electric power is electric power when converting electrical energy into other forms energy.The generated output be blower or
The power when power generations such as photovoltaic.Power when the energy storage power is energy storage device charge and discharge.
When the base power of the node is not comprising distributed resource electric power, the basic electricity at the node
Power.In one embodiment, the node is connected with household electricity equipment etc..Use of the household electricity equipment in one day
Electricity changes over time less, at this moment can generate the base power.
Please also refer to Fig. 3, in one embodiment, in the step S300, according to the congestion pricing model meter
Calculating congestion pricing includes:
S310 establishes the congestion pricing model.
S320 calculates the congestion pricing according to the congestion pricing model.
In the step S310, establishing the congestion pricing model is to establish the branch power and node electricity
Corresponding relation between pressure and the congestion pricing.By bringing the branch power and the node voltage into the obstruction electricity
Valence model can obtain the congestion pricing.
Please also refer to Fig. 4, in one embodiment, the S320 step includes:
S321 is based on the node injecting power and the node voltage, dispatches general power formula by electricity, obtains electricity
Amount scheduling general power.
S322 seeks the electricity scheduling general power derivative of the node power, passes through deploying node formula, meter
Operator node Marginal Pricing.
S323 obtains basic electricity price, subtracts the basic electricity price using the deploying node, obtains the node resistance
Fill in electricity price.
Please also refer to Fig. 5, in one embodiment, in the step S220, the node power formula are as follows:
In formula: m is that electricity dispatches subelement, the as described charge-discharge facility operator, and i is the node, and t is the tune
The time is spent, PEV(m, i, t) is that m electricity dispatches the electric car electric power of the subelement in i-node, t period,
PPV,cur(m, i, t) is that m electricity dispatches the generated output of the subelement in i-node, t period, PESS(m, i, t) is the
M electricity dispatches the energy storage power of the subelement in i-node, t period, NmSubelement sum, P are dispatched for electricityagg(i,
It t) is the node power of the i-node within t scheduling time, as external output power of the i-node within t scheduling time.
[P in formula (1)EV(m,i,t)+PPV(m,i,t)+PESS(m, i, t)] indicate the scheduling subelement of electricity described in m in i
The sum of described electric car electric power, the generated output and the energy storage power in node t scheduling time.Formula (1) table
Show the charge-discharge electric power summation of whole in i-node t scheduling time electricity scheduling subelement, obtains, Pagg(i, t) is i
The node power of the node within t scheduling time, as external output power of the i-node within t scheduling time.
The node injecting power, the node injecting power formula are calculated by the node injecting power formula are as follows:
Pinj(i, t)=- [PL(i,t)+Pagg(i,t)] (2)
In formula: PL(i, t) is the base power of the node i within t scheduling time, Pinj(i, t) is node i in the t period
The node injecting power.Injecting power is the power inputted to power grid.Power network line carries the node injecting power
Maximum value is related to the parameter of power network line.
In one embodiment, in the step S230, the branch power formula are as follows:
In formula: NjFor the node total number of jth branch, PjIt (t) is the injecting power of the jth branch in the t period, Fj-i
Distribution factor (power transfer distribution factors, PTDF) is transmitted for dc power.
The node voltage formula are as follows:
V (i, t)=1+Pinj(i,t)Ri+Qinj(i,t)Xi (4)
In formula: Qinj(i, t) is injection reactive power of the node i in the injection power grid of t period, RiFor resistance, XiFor impedance.
Pinj(i, t) is injection active power of the node i in the injection power grid of t period, and active power is to maintain electrical equipment normal operation
Required electrical power converts electrical energy into the electrical power of other forms energy (mechanical energy, luminous energy, thermal energy).Reactive power be
The electrical power that magnetic field is established and maintained in electrical equipment, realizes the conversion of circuit internal electric field energy and magnetic field energy.
In one embodiment, in the step S240, examine the branch power whether the formula of overrun are as follows:
-Pj,max≤Pj(t)≤Pj,max (5)
In formula: Fj-iDistribution factor, P are transmitted for dc powerj,maxIndicate the power preset value of branch j.
When the branch power is more than maximum value, it will lead to the branch line and pass by heat.The part of the branch route
Overheat, causes that route is burnt or even electrical equipment is burnt.The branch power is controlled by formula (5) and is preset in the power
It is worth in range, when user terminal being avoided to concentrate electricity consumption, the branch power is excessively high.In turn, terminal electrical equipment peace is effectively ensured
Entirely.
Examine the node voltage whether the formula of overrun are as follows:
Vmin≤V(i,t)≤Vmax (6)
In formula: VminFor the upper limit value of the voltage preset value of node i, VmaxFor the voltage preset value of node i
Lower limit value.
When the electric current that generating equipment generates imports power grid, the voltage that will cause the node rises.When the node electricity
When pressure is more than maximum value, electrical equipment not only can be directly burnt, and will lead to insulation measures failure, or even cause fire.
In one embodiment, in the S321 described in step, the electricity dispatches general power formula are as follows:
In formula: L is that the electricity dispatches general power, λ1And λ2For the electricity price factor related with power, μ1And μ2For with voltage
The related electricity price factor.
In one embodiment, in the S322 step, the deploying node formula are as follows:
In formula: yDLMPFor the deploying node, yconFor the congestion pricing, y is the basic electricity price.
In one embodiment, in S323 step, the Nodal congestion price formula are as follows:
Please also refer to Fig. 6, the distribution system scheduling institution obtains electricity from multiple charge-discharge facility operators
The scheduling time of multiple nodes of net and the planned dispatching power of the node corresponding with the scheduling time, pass through institute
The cluster electric car exchange method for considering obstruction is stated, the congestion pricing is obtained.It is influenced by the congestion pricing, it is described
Charge-discharge facility operator can adjust the plan tune of the scheduling time and the node corresponding with the scheduling time
Spend power.
Please also refer to Fig. 7, in one embodiment, before the S100 step, further includes:
S010, electricity scheduling subelement according to electricity price prediction model, obtain the scheduling time and with the scheduling
The planned dispatching power of the time corresponding node.
The charge-discharge facility operator can be on the day before electricity consumption, according to the planned dispatching of electricity price empirical value and the node
The minimum total price of the total activation electricity of charge-discharge facility operator described in power calculation.The charge-discharge facility operator can select
It goes to estimate and dispatch electricity in total electricity price the smallest period, forms initial electricity consumption plan.The charge-discharge facility operator is again
By the planned dispatching power of the scheduling time and the node corresponding with the scheduling time, it is reported to the distribution system
Scheduling institution.
In one embodiment, after the S300 step, the distribution system scheduling institution is by the node congestion
Electricity price feeds back to the charge-discharge facility operator, i.e. total activation center will feed back to the electricity to the Nodal congestion price
Subelement is dispatched, the electricity scheduling subelement will carry out step:
S400 is based on the Nodal congestion price, to the scheduling time and the section corresponding with the scheduling time
The planned dispatching power of point is modified.
In one embodiment, include: in the S400 and the S010 step
S410, total electricity price minimum principle based on electricity scheduling subelement obtain optimal according to electrically optimized formula
The planned dispatching power of scheduling time corresponding node.
S420, based on the planned dispatching power of the corresponding node of optimal scheduling time, according to power energy allocation public affairs
Formula distributes the electric car electric power, the generated output and the energy storage power.
It is default to judge whether the electric car electric power redistributed is greater than electric car electric power by S430
Value, judge corresponding with electric car electric power vehicle electric system with quantities of charge whether in electric car electricity consumption
In lotus amount values.
Judge the charge-discharge electric power whether in charge-discharge electric power values, judgement and the charge-discharge electric power phase
Whether the charged value of corresponding charge-discharge system is in the charged values of charge and discharge.
Judge whether the generated output is greater than generated output preset value.
S440, if the electric car electric power redistributed is greater than electric car electric power preset value,
The S430 step is returned, electricity is redistributed.
If the corresponding vehicle electric system of electric car electric power redistributed with quantities of charge not electronic
In automobile quantity of electric charge values, then the S430 step is returned, electricity is redistributed.
If the charge-discharge electric power redistributed returns to the S430 not in charge-discharge electric power values
Step redistributes electricity.
If the charged value for the corresponding charge-discharge system of the charge-discharge electric power redistributed is not in the lotus of charge and discharge
In electric values, then the S430 step is returned, electricity is redistributed.
If the generated output redistributed is greater than generated output preset value, the S430 step is returned to, again
Distribute electricity.
Please also refer to Fig. 8, in one embodiment, in the S430 step with formula be；
Using the electricity consumption constraint formulations, judge whether the electric car electric power redistributed is greater than electronic vapour
Automobile-used electrical power preset value, judge corresponding with electric car electric power vehicle electric system with quantities of charge whether
In quantity of electric charge values for electric vehicle.The electricity consumption constraint formulations are as follows:
0≤PEV(m,i,t)≤PEV,max (12.1)
SOCEV,min(m, i)≤SOCEV(m, i, t)≤SOCEV,max(m, i) (12.2)
SOCEV(m, i, t+1)=SOCEV(m,i,t)+ηPEV(m,i,t)/EEV(m,i) (12.3)
In formula: PEV,maxThe electric car electric power of the subelement in i-node, t period is dispatched for m electricity
Preset value, SOCEV(m, i, t) is that m electricity dispatches for electric vehicle charge electricity of the subelement in i-node, t period
Amount, SOCEV,minThe for electric vehicle quantities of charge preset value of the subelement in i-node, t period is dispatched for m electricity
Minimum value, SOCEV,maxThe for electric vehicle quantities of charge of the subelement in i-node, t period is dispatched for m electricity
The maximum value of preset value, EEV(m, i) is that m electricity dispatches electricity capacity summation of the subelement in i-node, t period, and η is
Electric car charge efficiency.
In embodiment, formula (12.1) is the charge power constraint formulations of the cluster electric car.Formula (12.1) is by institute
State cluster electric car charge power be limited to 0 and the cluster electric car charge power maximum range in, prevent
The charge power of the cluster electric car is excessive, and route is caused to damage.Formula (12.2) is the cluster batteries of electric automobile lotus
Electricity condition constraint formulations.Formula (12.2) limits the charge electricity for electric vehicle with quantities of charge for the cluster electric car
It measures in values, prevents batteries of electric automobile from overcharging and over-discharge, to extend battery.Formula (12.3)
Indicate the quantities of charge for electric vehicle with the situation of change of electricity consumption time.
Using charge and discharge constraint formulations, judge that the charge-discharge electric power whether in charge-discharge electric power values, is sentenced
Whether the charged value of disconnected charge-discharge system corresponding with the charge-discharge electric power is in the charged values of charge and discharge.Institute
State charge and discharge constraint formulations are as follows:
PESS, min(m,i)≤PESS(m,i,t)≤PESS, max(m,i) (13.1)
SOCESS, min(m,i)≤SOCESS(m,i,t)≤SOCESS, max(m,i) (13.2)
SOCESS(m, i, t+1)=SOCESS(m,i,t)+PESS(m,i,t)/EESS(m,i) (13.3)
SOCESS(m, i, 1)=SOCESS(m,i,24) (13.4)
In formula: PESS,minThe charge-discharge electric power preset value of the subelement in i-node, t period is dispatched for m electricity
Minimum value, PESS,maxThe charge-discharge electric power preset value of the subelement in i-node, t period is dispatched most for m electricity
Big value, SOCESS(m, i, t) is the charged value that m electricity dispatches charge-discharge system of the subelement in i-node, t period,
SOCESS,minThe minimum value of subelement charged preset value of charge-discharge system on i-node is dispatched for m electricity,
SOCESS,maxThe maximum value of subelement charged preset value of charge-discharge system on i-node is dispatched for m electricity.
In one embodiment, the charge-discharge system is energy-storage battery.Formula (13.1) is the charge and discharge of the energy-storage battery
Electrical power constraint formulations.The charge-discharge electric power of the energy-storage battery is limited the charge-discharge electric power preset value most by formula (13.1)
Between big value and minimum value, prevents the charge-discharge electric power of the energy-storage battery excessive, route is caused to generate heat.Meanwhile it avoiding described
The charge-discharge electric power of energy-storage battery is too small, leads to underpower, and node voltage is too low.It (13.2) is the charged of the energy-storage battery
The constraint formulations of value.The charged value of the energy-storage battery is limited the maximum of the charged preset value of the energy-storage battery by formula (13.2)
Between value and minimum value.Formula (13.3) is by the charge-discharge electric power of the energy-storage battery with the situation of change of charge and discharge time.Formula
(13.4) it indicates that the intraday initial conditions of the energy-storage battery and end-state are consistent, maintains the energy-storage battery
Stable state realizes the effect for adjusting power grid part electric energy.
Judge whether the generated output is greater than generated output preset value using the power generation constraint formulations, the power generation is about
Beam formula are as follows:
0≤PPV(m,i,t)≤PPV,max (14.1)
PPV(m, i, t)=PPV, max(m,i,t)-PPV, cur(m,i,t) (14.2)
In formula: PPV,maxThe generated output preset value of the subelement in i-node, t period is dispatched for m electricity
Upper limit value, PPV,cur(m, i, t) is respectively that the generated output of the m electricity scheduling subelement in i-node, t period is cut down
Value.
The generated output is generated when conveying electricity to power grid from electricity generation system.In one embodiment, the hair
Electric system is photovoltaic generating system.Formula (14.1) is the constraint formulations of the generated output of the photovoltaic generating system.Formula
(14.1) generated output is limited between 0 and the upper limit value of the generated output preset value.Avoid the photovoltaic power generation
System to power grid conveying electricity power it is excessively high, cause route to burn.
In one embodiment, choose Liang Ge charge-discharge facility operator be respectively Aggregator1 and
Aggregator2.Aggregator1 and Aggregator2 possesses electric car electricity consumption port, photovoltaic power generation port and storage respectively
Energy battery port connects at the different nodes from power grid.It is 3 × 500kW that Aggregator1, which possesses the photovoltaic scale, point
Not Jie Ru power grid node 17,21 or 25；Aggregator1 possesses the electric car 3 × 150, is respectively connected to power grid
Node 18,22 or 24；It is 3 × 500kWh that Aggregator1, which possesses the energy-storage battery scale, is respectively connected to the node of power grid
21 or 25.It is 3 × 500kW that Aggregator2, which possesses the photovoltaic scale, is respectively connected to the node 16,17 or 33 of power grid；
Aggregator2 possesses the electric car 3 × 150, is respectively connected to the node 17,23 or 25 of power grid；Aggregator2 is gathered around
Having the energy-storage battery scale is 3 × 500kWh, is respectively connected to the node 16 or 33 of power grid.The electric car, the light
The distribution of volt and the energy-storage battery is as shown in table 1.
The distribution of table 1 electric car, photovoltaic and energy-storage battery
Main brand distribution electrical equipment is counted, the electric car, the photovoltaic and the energy-storage battery are obtained
Relevant parameter, as shown in table 2.
The relevant parameter of 2 electric car of table, photovoltaic and energy-storage battery
The load factor of route is the ratio of the bearing power of route and the maximum load power of route, as Pj/Pj,max.Electricity
Do not use the load factor model of congestion control methods for type 1 in net, using the congestion control methods of capacity of trunk in power grid
Load factor model is type 2, use in power grid the load rate model of the congestion control methods of herein described active distribution method for
Type 3.Table 3 is the line load rate of 22 whole day of route.
The line load rate of 3 route of table, 22 whole day
When not using congestion control methods in power grid as can be known from Table 3, route 22 is in 0:00,1:00,2:00,3:00,4:
00,5:00 and 23:00 will appear the case where load factor is more than 100%.In 4:00, the load factor of route 22 is up to
188.20%.Using the obstructive root canal side of the congestion control methods of capacity of trunk and herein described active distribution method in power grid
After method, the load factor of any time section is all less than 100% in power grid, and the power adjustment result of two methods is identical.Electricity
After the congestion control methods for using herein described active distribution method in net, 0:00,1:00,2:00,3:00,4:00,17:
00, the load factor of 18:00,19:00,20:00,21:00,22:00 and 23:00 are 100%, realize rationally dividing for power
Match.
Table 4 is the statistical result of 18 whole day node voltage per unit value of node.(per unit value is Power System Analysis and engineering
Common numeric indicia method, indicates the relative value of each physical quantity and parameter in calculation.) in the power system, the node voltage
The normal range (NR) of per unit value is between 0.95-1.05.As seen from Table 4, congestion control methods are not used in power grid and using line
When the congestion control methods of appearance of a street amount, there is the node voltage per unit value greater than 1.05 or small in different periods in node 22
In 0.95 the case where.Using after herein described active distribution method in power grid, the node voltage per unit value is in 0.95-
Between 1.05.As shown in table 4, herein described active distribution method can be effectively controlled the node voltage, make it in best electricity
In the sphere of circulation of road.
The node voltage of 4 node of table, 18 whole day
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of cluster electric car exchange method for considering obstruction, the power grid include multiple nodes and including the node
Branch characterized by comprising
S100 obtains the scheduling time of multiple nodes of power grid and the plan of the node corresponding with the scheduling time
Schedule power；
S200 judges whether the branch power of the branch is more than power preset value, and judge according to the planned dispatching power
Whether the node voltage of each node is more than voltage preset value；
S300, if the branch power is more than the power preset value or the node voltage is more than the voltage preset value,
Congestion pricing is calculated according to congestion pricing model.
2. the cluster electric car exchange method as described in claim 1 for considering obstruction, which is characterized in that the planned dispatching
Power includes electric car electric power, generated output and energy storage power.The step S200 further include:
S210 obtains the base power of the node；
S220 is based on the electric car electric power, the generated output and the energy storage power, passes through node power public affairs
Formula, calculate node power,
The negative value for calculating the sum of the node power and the base power obtains node injecting power；
S230 obtains the branch power by branch power formula based on the node injecting power,
The node voltage is obtained by node voltage formula based on the node injecting power；
S240 judges whether the branch power is more than the power preset value, and judges whether the node voltage is more than institute
State voltage preset value.
3. the cluster electric car exchange method as claimed in claim 2 for considering obstruction, which is characterized in that in the step
In S300, calculating congestion pricing according to the congestion pricing model includes:
S310 establishes the congestion pricing model；
S320 calculates congestion pricing according to the congestion pricing model.
4. the cluster electric car exchange method as claimed in claim 3 for considering obstruction, which is characterized in that the S320 step
Include:
S321 is based on the node injecting power and the node voltage, dispatches general power formula by electricity, obtains electricity tune
Spend general power；
S322 seeks the electricity scheduling general power derivative of the node power, by deploying node formula, calculates section
Point Marginal Pricing；
S323 obtains basic electricity price, subtracts the basic electricity price using the deploying node, obtains the node congestion electricity
Valence.
5. the cluster electric car exchange method as claimed in claim 4 for considering obstruction, which is characterized in that in the step
In S220, the node power formula are as follows:
In formula: m is that electricity dispatches subelement, and i is the node, and t is the scheduling time, PEV(m, i, t) is the scheduling of m electricity
The electric car electric power of the subelement in i-node, t period, PPV, cur(m, i, t) is that m electricity dispatches subelement
The generated output in i-node, t period, PESS(m, i, t) is that m electricity dispatches subelement in i-node, t period
The interior energy storage power, NmSubelement sum, P are dispatched for electricityagg(i, t) is the section of the node i within t scheduling time
Point power；
Pass through the electric car electric power to the distributed resource generation in the node same period, the power generation
Power and the energy storage power add up, and the node power of the node in the period is calculated；
The node injecting power, the node injecting power formula are calculated by the node injecting power formula are as follows:
Pinj(i, t)=- [PL(i, t)+Pagg(i, t)] (2)
In formula: PL(i, t) is basic load of the node i in the t period, Pinj(i, t) is section of the node i in the injection power grid of t period
Point injecting power.
6. the cluster electric car exchange method as claimed in claim 5 for considering obstruction, which is characterized in that in the step
In S230, the branch power formula are as follows:
In formula: NjFor the node total number of jth branch, PjIt (t) is the injecting power of the jth branch in the t period；
The node voltage formula are as follows:
V (i, t)=1+Pinj(i, t) Ri+Qinj(i, t) Xi (4)
In formula: Qinj(i, t) is injection reactive power of the node i in the injection power grid of t period, RiFor resistance, XiFor impedance.
7. the cluster electric car exchange method as claimed in claim 6 for considering obstruction, which is characterized in that in the step
In S240, examine the branch power whether the formula of overrun are as follows:
-PJ, max≤Pj(t)≤PJ, max (5)
In formula: Fj-iDistribution factor, P are transmitted for dc powerJ, maxIndicate the power preset value of branch j；
Examine the node voltage whether the formula of overrun are as follows:
Vmin≤ V (i, t)≤Vmax (6)
In formula: VminFor upper limit value in the voltage preset value of node i, VmaxFor the voltage preset value lower limit of node i
Value.
8. the cluster electric car exchange method as claimed in claim 7 for considering obstruction, which is characterized in that described in step
In S321, the electricity dispatches general power formula are as follows:
In formula: L is that the electricity dispatches general power, λ1And λ2For the electricity price factor related with power, μ1And μ2It is related to voltage
The electricity price factor.
9. the cluster electric car exchange method as claimed in claim 8 for considering obstruction, which is characterized in that walked in the S322
In rapid, the deploying node formula are as follows:
In formula: yDLMPFor the deploying node, yconFor the congestion pricing, y is the basic electricity price.
10. the cluster electric car exchange method as claimed in claim 9 for considering obstruction, which is characterized in that in S323 step
In, the Nodal congestion price formula are as follows:
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