CN109546683A - A kind of power distribution network Node distribution formula photovoltaic receiving capability margin optimization method - Google Patents
A kind of power distribution network Node distribution formula photovoltaic receiving capability margin optimization method Download PDFInfo
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
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Abstract
The invention discloses a kind of power distribution network Node distribution formula photovoltaics to receive capability margin optimization method, receives ability according to the distributed photovoltaic limit that primary data calculates each node of power distribution network；Using upper layer Optimized model, the optimization of access node photovoltaic power is carried out, and nargin coefficient of balance will be received to be transferred to underlying model；Using lower layer's Optimized model, the online power transmission of node users is given to upper layer model；After upper layer and lower layer model mutual iteration, the final optimal receiving ability of pre-access distributed photovoltaic node is obtained；It calculates power distribution network distributed photovoltaic node and receives nargin evaluation index.Operations staff of the present invention can receive nargin situation according to node, understanding each node of power distribution network in detail, also how many space can continue to receive distributed photovoltaic at present, Node distribution formula photovoltaic user is capable of the optimization for carrying out networking power of active, mitigates the pressure of power distribution network, while additional income.
Description
Technical field
The present invention relates to a kind of power distribution network Node distribution formula photovoltaics to receive capability margin optimization method, belongs to power distribution network section
Receiving enabling technology field of the point to distributed photovoltaic.
Background technique
Currently, distributed photovoltaic access can all affect power distribution network node voltage and Line Flow, so that power distribution network
Cannot unconfined receiving distributed photovoltaic, existing research is concentrated mainly on power distribution network to the receiving ability of distributed photovoltaic
Assessment calculates and receives two aspects of capability improving.Seldom from the angle estimator of node, calculate analysis power distribution network node to point
The receiving ability of cloth photovoltaic.
Node is the important component in distribution net work structure, and operating management department connects in addition to the entirety of concern power distribution network
Receive outside ability, the receiving ability of each node of power distribution network is grasped in more urgent hope, instruct power distribution network extending capacity reformation and
The orderly access of node users distributed photovoltaic.The receiving ability of node can adequately react the whole of power distribution network and receive water
It is flat.
Present invention offer power distribution network node receiving distributed photovoltaic evaluates and optimizes method, defines the node limit and connects
It receives ability and the optimal receiving ability of node, proposes 3 regions of the receiving ability of power distribution network, receive distributed light from node
The angle of volt proposes 4 nodes and receives nargin evaluation index, constructs economic optimum, receives the maximum dual-layer optimization of nargin
Model.
Summary of the invention
Purpose: in order to overcome the deficiencies in the prior art, the present invention provides a kind of power distribution network Node distribution formula photovoltaic
Receive capability margin optimization method.
Technical solution: in order to solve the above technical problems, the technical solution adopted by the present invention are as follows:
A kind of power distribution network Node distribution formula photovoltaic receiving capability margin optimization method, includes the following steps:
Step 1: inputting the node power of power distribution network, and line impedance has accessed distributed photovoltaic node and power, network
The primary data of structure；
Step 2: ability is received according to the distributed photovoltaic limit that primary data calculates each node of power distribution network；
Step 3: utilizing upper layer Optimized model, and with loss minimization, higher level's power grid power purchase is minimum, optimal receiving nargin is maximum
For optimization aim, and meet constraint condition, carries out the optimization of access node photovoltaic power, and the transmission of nargin coefficient of balance will be received
To underlying model；
Step 4: utilize lower layer's Optimized model, using node users Income Maximum as optimization aim, meet constraint condition into
Row photovoltaic online power optimization, and give the online power transmission of node users to upper layer model；
Step 5: after upper layer and lower layer model mutual iteration, final pre-access distributed photovoltaic node is obtained most
Excellent receiving ability
Step 6: calculating power distribution network distributed photovoltaic node and receive nargin evaluation index, as shown in table 1:
Table 1 is that node receives nargin evaluation index.
Preferably, the distributed photovoltaic limit of each node of the power distribution network receives ability to refer in existing distribution
Web frame, load and distributed generation resource it is constant on the basis of, by being continuously increased to access node photovoltaic capacity, online
Under the constraint of road electric current, any node voltage in power grid reaches the maximum working voltage of permission or line current reaches permission most
Distributed photovoltaic capacity corresponding to high current.
Preferably, shown in the upper layer Optimized model such as formula (1):
In formula: T is dispatching cycle, NliFor power distribution network circuitry number；For line loss power； Pps,tFor the purchase of higher level's power grid
Electrical power, N are power distribution network number of nodes,For the optimal receiving nargin of distributed photovoltaic node；
The constraint condition of the upper layer Optimized model is the security constraint and receiving margin constraints of power distribution network, comprising: trend
Equation constraint, power-balance constraint, node voltage constraint, branch current constraint, the limit receive margin constraints；
The power flow equation constraint is as shown in formula (2):
In formula: Pi,t、Qi,tThe respectively active power and reactive power of node injection；Vi,t、Vj,tIt is node i, j respectively
Node voltage；Gij、BijConductance and susceptance respectively between node i and j；θijPhase angle difference between node i and j；
Shown in the power-balance constraint such as formula (3):
In formula: NpvPhotovoltaic number of nodes is accessed for power distribution network；NliFor distribution network line number, Nlo=N-NpvIt is not connect for power distribution network
Enter the number of nodes of photovoltaic；For distributed photovoltaic node networking power, the optimization for being transferred to layer model for underlying model becomes
Amount；Access photovoltaic node power purchase power；For node load power；
The node voltage constraint is as shown in formula (4):
Vi min≤Vi,t≤Vi max (4)
In formula: Vi min, Vi maxIt is node voltage minimum value and maximum value respectively；
The branch current constraint is as shown in formula (5):
Ii min≤Ii,t≤Ii max (5)
In formula: Ii min, Ii maxIt is branch current minimum value and maximum value respectively；
The limit is received shown in margin constraints such as formula (6):
In formula:It is node receiving area index.
Preferably, shown in lower layer's Optimized model such as formula (7):
In formula:It is parameter of the upper layer Model Transfer to lower layer to receive nargin coefficient of balance, whenWhen take
1, whenWhen, value between [0,1]；For photovoltaic networking electricity price；Electricity price is subsidized for photovoltaic；For power grid power purchase
Electricity price；For node photovoltaic power output；For node power purchase power；For energy storage j purchase cost；It is filled for j-th of energy storage
Discharge cycles service life number；Respectively energy storage discharge power and charge power；α, β are energy storage charge and discharge shape
State flag parameter is 0-1 variable, meets alpha+beta≤1；
The constraint condition is as follows:
Shown in power-balance constraint such as formula (8):
Shown in node networking power constraint such as formula (9):
Wherein,Ability is received for the distributed photovoltaic node limit；
Energy storage charge state constraint is as shown in formula (10):
SOC,min≤SOC≤SOC,max (10)
In formula: SOC,min, SOC,maxRespectively state-of-charge minimum value and maximum value, SocIt is charged for energy storage.As preferred side
Case, shown in the node receiving area index such as formula (11):
In formula: subscript t indicates t moment, and subscript i indicates i-node, and following formula indicates identical；For distributed photovoltaic
The node i limit receives nargin；Ability is received for the distributed photovoltaic node limit；It is connect for distributed photovoltaic node is optimal
Receive ability；For distributed photovoltaic node networking power；
Shown in the optimal receiving nargin of distributed photovoltaic node such as formula (12):
In formula:For the optimal receiving nargin of distributed photovoltaic node；
The power distribution network node is received shown in the nargin warning frequency such as formula (13):
In formula: FnetTo receive the nargin policing node frequency；T is dispatching cycle；N is power distribution network number of nodes；For node
Nargin zone state judges 0-1 variable, and it is 1 that policing node, which occurs, for time t moment, and it is 0 that policing node, which does not occur,；
Shown in the optimal receiving average size of power distribution network node such as formula (14):
In formula:For the optimal receiving average size of power distribution network node.
It preferably, further include step 7, the step 7: according to the receiving margin index of each node of power distribution network
Overall assessment is carried out to the distributed photovoltaic access situation of each node of power distribution network；4 indexs are from node and power distribution network two
Aspect sufficiently reacts power distribution network to the receiving nargin of distributed photovoltaic；The node limit receives nargin and optimal receiving nargin that can divide
Not Zuo Wei node receive nargin regional boundary condition, power distribution network receive nargin warning the frequency and optimal receiving average size can
React the ability of the receiving distributed photovoltaic of power distribution network.
Preferably, distributed photovoltaic node receiving area indicial response power distribution network node receives nargin region,Illustrate that photovoltaic receives nargin in out-of-limit area；Illustrate that photovoltaic receives nargin in high-quality area；Explanation
Photovoltaic receives nargin in security area；
The distributed photovoltaic node optimal receiving nargin accurate response receiving nargin of node quality area,It says
The bright node meets optimal receiving nargin, and there are also certain nargin spaces to receive distributed photovoltaic；Illustrate optimal connect
It receives nargin insufficient space, continues to receive, be not able to satisfy economy；
Power distribution network receives the nargin policing node frequency that can react the optimal overall situation for receiving nargin of power distribution network, to adjust
Spend the total degree that all nodes in the period are in security area, Fnet=0 illustrates that all nodes are received abundant in the schedule periods of power distribution network
Degree is in high-quality area；
Power distribution network is optimal to receive average size reaction to receive nargin in the node in high-quality area, i.e.,All sections
The average value of the optimal receiving capacity of point N is an average value of the optimal receiving level of each node of power distribution network, has reacted distribution
The integral level of net receiving ability.
The utility model has the advantages that a kind of power distribution network Node distribution formula photovoltaic provided by the invention receives capability margin optimization method, it is first
It first defines the power distribution network Node distribution formula photovoltaic limit and receives ability and optimal receiving ability, propose Node distribution formula photovoltaic
Nargin evaluation index is received, and establishes the optimization method of Node distribution formula photovoltaic.Operations staff can receive nargin feelings according to node
Condition, understanding each node of power distribution network in detail, also how many space can continue to receive distributed photovoltaic, Node distribution formula light at present
Volt user is capable of the optimization for carrying out networking power of active, mitigates the pressure of power distribution network, while additional income.
For this method by establishing the evaluation index of Node distribution formula photovoltaic, the bilayer for establishing distribution stratum reticulare and client layer is excellent
Change model, distribution stratum reticulare is optimal with power distribution network economical operation, the optimal receiving ability of node is up to target, and client layer is with node
Distributed photovoltaic user's Income Maximum is target, and by the dual-layer optimization of power distribution network and node, consumer-oriented orderly access is matched
Power grid instructs power distribution network operating management department targetedly to carry out network expansion and transformation.This method is applied to power distribution network
In reach it is following the utility model has the advantages that
(1) the Node distribution formula photovoltaic limit proposed receives nargin that can effectively differentiate and receives nargin region；
(2) node is optimal receives nargin to can be realized the accurate positionin that power distribution network receives nargin, connects in Yi Faxian power distribution network
The out-of-limit node of nargin of receiving has operating management department and uses for reference reference value well；
(3) coordination and interaction of power distribution network and node users are utilized, the especially configuration of energy storage can effectively promote distribution
The optimal receiving nargin of net node；
(4) the nargin coefficient of balance introduced in the bi-level optimal model constructed herein can effectively promote connecing for node
It receives nargin, effectively guides the orderly networking of user distribution formula photovoltaic networking power.
Detailed description of the invention
Fig. 1 is that distributed photovoltaic of the present invention receives nargin optimization method flow chart；
Fig. 2 is that power distribution network node receives nargin area schematic.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
As shown in Figure 1, a kind of power distribution network Node distribution formula photovoltaic receives capability margin optimization method, include the following steps:
Step 1: inputting the node power of power distribution network, and line impedance has accessed distributed photovoltaic node and power, network
The primary data of structure；
Step 2: ability is received according to the distributed photovoltaic limit that primary data calculates each node of power distribution network；
The distributed photovoltaic limit of each node of power distribution network receive ability refer to existing distribution net work structure, load with
And on the basis of distributed generation resource is constant, by being continuously increased to access node photovoltaic capacity, in the constraint of line current
Under, any node voltage in power grid reaches the maximum working voltage of permission or line current reaches corresponding to permission maximum current
Distributed photovoltaic capacity.
Step 3: utilizing upper layer Optimized model, and with loss minimization, higher level's power grid power purchase is minimum, optimal receiving nargin is maximum
For optimization aim, and meet constraint condition, carries out the optimization of access node photovoltaic power, and the transmission of nargin coefficient of balance will be received
To underlying model；
Shown in the upper layer Optimized model such as formula (1):
In formula: T is dispatching cycle, NliFor power distribution network circuitry number；For line loss power； Pps,tFor the purchase of higher level's power grid
Electrical power, N are power distribution network number of nodes,For the optimal receiving nargin of distributed photovoltaic node.
The constraint condition of the upper layer Optimized model is the security constraint and receiving margin constraints of power distribution network, comprising: trend
Equation constraint, power-balance constraint, node voltage constraint, branch current constraint, the limit receive margin constraints.
The power flow equation constraint is as shown in formula (2):
In formula: Pi,t、Qi,tThe respectively active power and reactive power of node injection；Vi,t、Vj,tIt is node i, j respectively
Node voltage；Gij、BijConductance and susceptance respectively between node i and j；θijPhase angle difference between node i and j.
Shown in the power-balance constraint such as formula (3):
In formula: NpvPhotovoltaic number of nodes is accessed for power distribution network；NliFor distribution network line number, Nlo=N-NpvIt is not connect for power distribution network
Enter the number of nodes of photovoltaic；For distributed photovoltaic node networking power, the optimization for being transferred to layer model for underlying model becomes
Amount；Access photovoltaic node power purchase power；For node load power.
The node voltage constraint is as shown in formula (4):
Vi min≤Vi,t≤Vi max (4)
In formula: Vi min, Vi maxIt is node voltage minimum value and maximum value respectively.
The branch current constraint is as shown in formula (5):
Ii min≤Ii,t≤Ii max (5)
In formula: Ii min, Ii maxIt is branch current minimum value and maximum value respectively.
The limit is received shown in margin constraints such as formula (6):
In formula:It is node receiving area index.
Step 4: utilize lower layer's Optimized model, using node users Income Maximum as optimization aim, meet constraint condition into
Row photovoltaic online power optimization, and give the online power transmission of node users to upper layer model；
Shown in lower layer's Optimized model such as formula (7):
In formula:It is upper layer Model Transfer to the parameter of lower layer to receive nargin coefficient of balance, it can be according to expert and fortune
It passes through to test and provide, under normal circumstances, whenWhen take 1, whenWhen, value between [0,1]；For photovoltaic networking
Electricity price；Electricity price is subsidized for photovoltaic；For power grid purchase electricity price；For node photovoltaic power output；For node power purchase power；For energy storage j purchase cost；For j-th of energy storage charge and discharge circulation life number；Respectively energy storage
Discharge power and charge power；α, β are energy storage charging and discharging state flag parameter, are 0-1 variable, meet alpha+beta≤1.
The constraint condition is as follows:
Shown in power-balance constraint such as formula (8):
Shown in node networking power constraint such as formula (9):
Wherein,Ability is received for the distributed photovoltaic node limit.
Energy storage charge state constraint is as shown in formula (10):
SOC,min≤SOC≤SOC,max (10)
In formula: SOC,min, SOC,maxRespectively state-of-charge minimum value and maximum value, SocIt is charged for energy storage.
Step 5: after upper layer and lower layer model mutual iteration, final pre-access distributed photovoltaic node is obtained most
Excellent receiving ability
Step 6: calculating power distribution network distributed photovoltaic node and receive nargin evaluation index, as shown in table 1:
Table 1 is that node receives nargin evaluation index
Shown in the node receiving area index such as formula (11):
In formula: subscript t indicates t moment, and subscript i indicates i-node, and following formula indicates identical；For distributed photovoltaic
The node i limit receives nargin；Ability is received for the distributed photovoltaic node limit；It is connect for distributed photovoltaic node is optimal
Receive ability；For distributed photovoltaic node networking power.
Shown in the optimal receiving nargin of distributed photovoltaic node such as formula (12):
In formula:For the optimal receiving nargin of distributed photovoltaic node.
The power distribution network node is received shown in the nargin warning frequency such as formula (13):
In formula: FnetTo receive the nargin policing node frequency；T is dispatching cycle；N is power distribution network number of nodes；For node
Nargin zone state judges 0-1 variable, and it is 1 that policing node, which occurs, for time t moment, and it is 0 that policing node, which does not occur,.
Shown in the optimal receiving average size of power distribution network node such as formula (14):
In formula:For the optimal receiving average size of power distribution network node.
Step 7: the distributed photovoltaic of each node of power distribution network is connect according to the receiving margin index of each node of power distribution network
Enter situation and carries out overall assessment.Above-mentioned 4 indexs sufficiently react power distribution network to distribution in terms of node and power distribution network two
The receiving nargin of photovoltaic.The node limit receives nargin and optimal receiving nargin that can receive nargin zone boundary respectively as node
Condition, power distribution network receive the nargin warning frequency and the optimal receiving distributed photovoltaic for receiving average size that can react power distribution network
Ability.
Distributed photovoltaic node receiving area indicial response power distribution network node receives nargin region,Illustrate photovoltaic
Receive nargin in out-of-limit area；Illustrate that photovoltaic receives nargin in high-quality area；Illustrate that photovoltaic receives nargin to exist
Fig. 2 is shown in security area.
The distributed photovoltaic node optimal receiving nargin accurate response receiving nargin of node quality area, i.e. reaction should
Node can continue to receive the optimal nargin of photovoltaic.Illustrate that the node meets optimal receiving nargin, there are also certain
Receive distributed photovoltaic in nargin space；Illustrate optimal receiving nargin insufficient space, continues to receive, be not able to satisfy economy
Property.
Power distribution network receives the nargin policing node frequency that can react the optimal overall situation for receiving nargin of power distribution network, to adjust
Spend the total degree that all nodes in the period are in security area, Fnet=0 illustrates that all nodes are received abundant in the schedule periods of power distribution network
Degree is in high-quality area.
Power distribution network is optimal to receive average size reaction to receive nargin in the node in high-quality area, i.e.,All sections
The average value of the optimal receiving capacity of point N is an average value of the optimal receiving level of each node of power distribution network, has reacted distribution
The integral level of net receiving ability.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of power distribution network Node distribution formula photovoltaic receives capability margin optimization method, characterized by the following steps:
Step 1: inputting the node power of power distribution network, and line impedance has accessed distributed photovoltaic node and power, network structure
Primary data；
Step 2: ability is received according to the distributed photovoltaic limit that primary data calculates each node of power distribution network；
Step 3: utilizing upper layer Optimized model, is up to loss minimization, higher level's power grid power purchase minimum, optimal receiving nargin excellent
Change target, and meet constraint condition, carries out the optimization of access node photovoltaic power, and nargin coefficient of balance will be received to be transferred to lower layer
Model；
Step 4: utilizing lower layer's Optimized model, using node users Income Maximum as optimization aim, meets constraint condition and carries out photovoltaic
Online power optimization, and give the online power transmission of node users to upper layer model；
Step 5: after upper layer and lower layer model mutual iteration, obtain that final pre-access distributed photovoltaic node is optimal to be connect
Receive ability
Step 6: calculating power distribution network distributed photovoltaic node and receive nargin evaluation index, as shown in table 1:
Table 1 is that node receives nargin evaluation index.
2. a kind of power distribution network Node distribution formula photovoltaic according to claim 1 receives capability margin optimization method, feature
Be: the distributed photovoltaic limit of each node of power distribution network receives ability to refer in existing distribution net work structure, load and divide
On the basis of cloth power supply is constant, by being continuously increased to access node photovoltaic capacity, under the constraint of line current, power grid
In any node voltage reach the maximum working voltage of permission or line current reaches allows distribution corresponding to maximum current
Photovoltaic capacity.
3. a kind of power distribution network Node distribution formula photovoltaic according to claim 1 receives capability margin optimization method, feature
It is: shown in the upper layer Optimized model such as formula (1):
In formula: T is dispatching cycle, NliFor power distribution network circuitry number；For line loss power；Pps,tFor higher level's power grid power purchase function
Rate, N are power distribution network number of nodes,For the optimal receiving nargin of distributed photovoltaic node；
The constraint condition of the upper layer Optimized model is the security constraint and receiving margin constraints of power distribution network, comprising: power flow equation
Constraint, power-balance constraint, node voltage constraint, branch current constraint, the limit receive margin constraints；
The power flow equation constraint is as shown in formula (2):
In formula: Pi,t、Qi,tThe respectively active power and reactive power of node injection；Vi,t、Vj,tIt is the node of node i, j respectively
Voltage；Gij、BijConductance and susceptance respectively between node i and j；θijPhase angle difference between node i and j；
Shown in the power-balance constraint such as formula (3):
In formula: NpvPhotovoltaic number of nodes is accessed for power distribution network；NliFor distribution network line number, Nlo=N-NpvLight is not accessed for power distribution network
The number of nodes of volt；For distributed photovoltaic node networking power, the optimized variable of layer model is transferred to for underlying model；
Access photovoltaic node power purchase power；For node load power；
The node voltage constraint is as shown in formula (4):
Vimin≤Vi,t≤Vimax(4)
In formula: Vimin, VimaxIt is node voltage minimum value and maximum value respectively；
The branch current constraint is as shown in formula (5):
Iimin≤Ii,t≤Iimax(5)
In formula: Iimin, IimaxIt is branch current minimum value and maximum value respectively；
The limit is received shown in margin constraints such as formula (6):
In formula:It is node receiving area index.
4. a kind of power distribution network Node distribution formula photovoltaic according to claim 1 receives capability margin optimization method, feature
It is: shown in lower layer's Optimized model such as formula (7):
In formula:It is parameter of the upper layer Model Transfer to lower layer to receive nargin coefficient of balance, whenWhen take 1, whenWhen, value between [0,1]；For photovoltaic networking electricity price；Electricity price is subsidized for photovoltaic；For power grid power purchase electricity
Valence；For node photovoltaic power output；For node power purchase power；For energy storage j purchase cost；For j-th of energy storage charge and discharge
Electric cycle life number；Respectively energy storage discharge power and charge power；α, β are energy storage charging and discharging state mark
Will parameter is 0-1 variable, meets alpha+beta≤1；
The constraint condition is as follows:
Shown in power-balance constraint such as formula (8):
Shown in node networking power constraint such as formula (9):
Wherein,Ability is received for the distributed photovoltaic node limit；
Energy storage charge state constraint is as shown in formula (10):
SOC,min≤SOC≤SOC,max (10)
In formula: SOC,min, SOC,maxRespectively state-of-charge minimum value and maximum value, SocIt is charged for energy storage.
5. a kind of power distribution network Node distribution formula photovoltaic according to claim 1 receives capability margin optimization method, feature
It is: shown in the node receiving area index such as formula (11):
In formula: subscript t indicates t moment, and subscript i indicates i-node, and following formula indicates identical；For distributed photovoltaic node i
The limit receives nargin；Ability is received for the distributed photovoltaic node limit；For the optimal receiving ability of distributed photovoltaic node；For distributed photovoltaic node networking power；
Shown in the optimal receiving nargin of distributed photovoltaic node such as formula (12):
In formula:For the optimal receiving nargin of distributed photovoltaic node；
The power distribution network node is received shown in the nargin warning frequency such as formula (13):
In formula: FnetTo receive the nargin policing node frequency；T is dispatching cycle；N is power distribution network number of nodes；fi tFor node nargin area
Domain state judges 0-1 variable, and it is 1 that policing node, which occurs, for time t moment, and it is 0 that policing node, which does not occur,；
Shown in the optimal receiving average size of power distribution network node such as formula (14):
In formula:For the optimal receiving average size of power distribution network node.
6. a kind of power distribution network Node distribution formula photovoltaic according to claim 1 receives capability margin optimization method, feature
It is: further includes step 7, the step 7: receives margin index to each node of power distribution network according to each node of power distribution network
Distributed photovoltaic accesses situation and carries out overall assessment；4 indexs sufficiently react power distribution network in terms of node and power distribution network two
To the receiving nargin of distributed photovoltaic；The node limit receives nargin and optimal receiving nargin that can receive nargin area respectively as node
Domain boundary condition, power distribution network receive the nargin warning frequency and the optimal receiving for receiving average size that can react power distribution network distributed
The ability of photovoltaic.
7. a kind of power distribution network Node distribution formula photovoltaic according to claim 6 receives capability margin optimization method, feature
Be: distributed photovoltaic node receiving area indicial response power distribution network node receives nargin region,Illustrate that photovoltaic is received
Nargin is in out-of-limit area；Illustrate that photovoltaic receives nargin in high-quality area；Illustrate that photovoltaic receives nargin guarding against
Area；
The distributed photovoltaic node optimal receiving nargin accurate response receiving nargin of node quality area,Illustrate the section
Point meets optimal receiving nargin, and there are also certain nargin spaces to receive distributed photovoltaic；Illustrate that optimal receiving nargin is empty
Between it is insufficient, continue to receive, be not able to satisfy economy；
Power distribution network receives the nargin policing node frequency that can react the optimal overall situation for receiving nargin of power distribution network, is dispatching cycle
Interior all nodes are in the total degree of security area, Fnet=0 illustrates that all nodes receive nargin high-quality in the schedule periods of power distribution network
Area；
Power distribution network is optimal to receive average size reaction to receive nargin in the node in high-quality area, i.e.,All node N most
The excellent average value for receiving capacity, is an average value of the optimal receiving level of each node of power distribution network, has reacted power distribution network and has received energy
The integral level of power.
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