CN104659789B - A kind of bidimensional control method of Distributed Generation in Distribution System power factor - Google Patents
A kind of bidimensional control method of Distributed Generation in Distribution System power factor Download PDFInfo
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- CN104659789B CN104659789B CN201510016454.2A CN201510016454A CN104659789B CN 104659789 B CN104659789 B CN 104659789B CN 201510016454 A CN201510016454 A CN 201510016454A CN 104659789 B CN104659789 B CN 104659789B
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Classifications
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses the bidimensional control method of a kind of Distributed Generation in Distribution System power factor, according to distribution feeder load level, (feeder line carries capacity rate η to the present inventionTOL) and distributed power source grid-connected point voltage level (voltage VDG) two dimensions, coupling makes distributed power source power factor optimization control interval, distribution feeder load level and distributed power source two dimensions of grid-connected point voltage level are depended in the formulation of distributed power source power factor optimization control interval, to promote the idle reactive power flow tried hard in minimizing power distribution network of distributed power source regulation, to solve saving energy and decreasing loss and the problem of regulating and controlling voltage in the power distribution network containing distributed power source.The present invention has the switching frequency combining the regulating power of load level and distributed power source self in network to reduce reactive-load compensation equipment, reduces the loss of network further, improves the feature of the quality of voltage of user side.
Description
Technical field
The present invention relates to quality of voltage and the saving energy and decreasing loss technical field of power distribution network, especially relate to
A kind of reactive power that can dynamically regulate distributed power source, reduces the fluctuation of power output to joining
The impact of electrical network, makes full use of the Reactive-power control ability of distributed power source, it is to avoid reactive-load compensation sets
The bidimensional control method of the Distributed Generation in Distribution System power factor of standby frequent switching.
Background technology
At present in the low-pressure reactive compensation of power distribution network, usually use low voltage dynamic reactive-power compensation
Power distribution network reactive power is optimized and controls by method, and concrete way is to distribution transforming transformation
The power factor controlling of device low-pressure side is delayed 0.90～0.95.Such way is light to being in
Network in the case of load can enter certain fall harm use, but be in the situation of heavy duty at network
This compensation method lower is the most not enough.Because circuit increases the weight of with equipment loss under case of heavy load, this
Time distribution low-voltage side power factor controlling just seem too low, be unfavorable for the wastage reducing and energy saving of network.
And for the power distribution network containing distributed power source, problem the most more highlights, reason is point
The fluctuation that cloth power supply is exerted oneself can cause the frequent fluctuation of network voltage, and network is maintained voltage
Stable and saving energy and decreasing loss stably causes a biggest difficult problem.
In recent years, the electricity brought for the power output fluctuation containing Distributed Generation in Distribution System
Pressure fluctuation and loss problem, people are constantly trying to find one's way out, but most method is also
Solve these problems the most well.Reason for that is: ignores available distributed electrical and is derived from
The regulating power of body is to reduce the impact of its power swing；Lack dynamically tracking current network to bear
Load level, distributed power source grid-connected point voltage level idle is exerted oneself in order to regulate it.It is known that
Due to distributed power source generally in power distribution network rear end access system, when power distribution network is in underloading and divides
When cloth power grid point voltage is higher, the reactive power flow of network is relatively fewer, now network
Active loss the most also can be less, it is not necessary to distributed power source sends out reactive power, even needs point
The suitable absorbing reactive power of cloth power supply；And when power distribution network is in heavy duty and distributed power source is grid-connected
When point voltage is relatively low, the reactive power flow of network is relatively large, and the now active loss of network is also
Can correspondingly increase, now multiple idle being beneficial to of distributed power source reduces the idle of power distribution network
Trend.
Chinese patent mandate publication number: CN103296754A, authorizes publication date 2013 9
The moon 11, disclose a kind of active distribution network distributed power source resource control method, described side
Method is United Dispatching zonal control, comprises the steps: that (1) determines power distribution network power coordination control
Scheme processed；(2) determining that power distribution network power coordination controls target, described control target includes agreement
Load curve runs and controls target and peak load shifting control target；(3) judge that power coordination controls
Whether object belongs to peak load shifting controls target；(4) realize peak load shifting and control target；(5)
Realize agreement load curve and run control target.The weak point of this invention is, function singleness,
The reactive power of distributed power source dynamically cannot be regulated.
Summary of the invention
The goal of the invention of the present invention is to overcome low voltage dynamic reactive-power compensation of the prior art
Method is unable to maintain that voltage stabilization and the stable deficiency of saving energy and decreasing loss, it is provided that one can dynamically be adjusted
The reactive power of joint distributed power source, the impact on power distribution network of the fluctuation of reduction power output,
Make full use of the Reactive-power control ability of distributed power source, it is to avoid reactive-load compensation equipment frequent switching
The bidimensional control method of Distributed Generation in Distribution System power factor.
To achieve these goals, the present invention is by the following technical solutions:
A kind of bidimensional control method of Distributed Generation in Distribution System power factor, described distribution
Net includes the 10kV feeder line drawn from transformer station, is linked into several points on 10kV feeder line
Cloth power supply and several distribution transformers；Distributed power source site are equipped with voltage transformer
And current transformer, each distributed power source is equipped with integrated control system, integrating control
System all includes computer and various for data acquisition with each transformer electromagnetic coupled
Measuring instruments；The integrated control system of each distributed power source all with the main website of grid dispatching center
Control system communicates to connect；Comprise the following steps:
(1-1) in main website control system, storage has the model of each feeder line, information and service data；
For certain feeder line, there is n distributed power source if accessing, the numbered k of each distributed power source,
K=1 ..., the initial value of n, k is 1；The main website control system measuring equipment by transformer station
Obtain total burden with power P of this feeder lineL, and read in its database the joining of this feeder line of storage
Piezoelectric transformer total capacity STOL；The rated voltage of each distributed power source is VN, deposit respectively
Storage is in its integrated control system；
Main website of the present invention control system refers to automatic voltage control system or comprises
The EMS of automatic voltage control system.
Automatic voltage control system refers to: utilize computer and the communication technology, idle in electrical network
Resource and voltage adjusting device automatically control, to reach to ensure power grid security, high-quality and economy
The automatic control system of the target run.
EMS is modern power network dispatch automated system (containing hardware and software) general name.Its
Major function is made up of basic function and two parts of application function.Basic function includes: calculate
Machine, operating system and EMS support system.Application function includes: data acquisition and monitoring system
(SCADA system), Automatic Generation Control (AGC) and economic dispatch control (EDC), power train
System state estimation (State Estimator), safety analysis (Security Analysis), dispatcher's mould
Intend training system (DTS).
(1-2) main website control system utilizes formulaCalculate this feeder line and carry capacity rate ηTOL,
And feeder line is carried capacity rate ηTOLIt is transferred to the integrated control system of each distributed power source；
(1-3) integrated control system of n distributed power source is equipped with the satisfied interval of voltage
[VN, 1.07VN], and voltage is satisfied with interval is all divided into three subintervals
[VN, Va)、[Va, Vb)、[Vb, 1.07VN], VN＜ Va＜ Vb＜ 1.07VN；
The integrated control system of each distributed power source stores to have and is satisfied with sub-district with each voltage
Between corresponding following power factor optimization control interval:
Work as ηTOL＜ 0.30 and VN≤VDG＜ VaTime, power factor optimization control interval is [stagnant
Rear 0.90, delayed 0.98]；
" delayed 0.90 " refers to that the value of power factor is delayed 0.90, if " advanced 0.90 " refers to
The value of power factor is advanced 0.90.
In alternating current, on the basis of voltage, the phase angle of electric current delays one than the phase angle of voltage
Individual angle, just makes electric current lag behind voltage, and between voltage and current, the cosine value of angle is exactly
Power factor (PF), because electric current lags behind voltage, it is simply that delayed power factor；On the contrary, electricity
The phase angle of stream is than one angle of phase angular advance of voltage, and being just called electric current is ahead of voltage, because of
This power factor now is advanced power factor.
Work as ηTOL＜ 0.30 and Va≤VDG≤Vb, power factor optimization control interval is [delayed
0.96, advanced 0.97]；
Work as ηTOL＜ 0.30 and Vb＜ VDG≤1.07VN, power factor optimization control interval be [1,
Advanced 0.95]；
Work as ηTOL>=0.30 and VN≤VDG＜ Va, power factor optimization control interval is [delayed
0.85, delayed 0.95]；
Work as ηTOL>=0.30 and Va≤VDG≤Vb, power factor optimization control interval is [delayed
0.93, advanced 0.99]；
Work as ηTOL>=0.30 and Vb＜ VDG≤1.07VN, power factor optimization control interval is
[delayed 0.99, advanced 0.97]；VDGRepresent the grid-connected point voltage of each distributed power source；
(1-4) integrated control system of kth distributed power source is surveyed by each measuring instruments
Amount power-factor cos ψ and voltage VDGAnd be acquired and store；
(1-5) the voltage V that the integrated control system of kth distributed power source will collectDG
It is satisfied with interval with its voltage to compare, works as VDGWhen being positioned at the satisfied interval of its voltage, proceed to step
Suddenly (1-6)；
Work as VDG＞ 1.07VNTime, integrated control system send instruction control this distributed power source with
Maximum under-excitation ability runs；
Work as VDG＜ VNTime, integrated control system sends instruction and controls this distributed power source with maximum
Phase ability is run late；Make k value increase by 1, proceed to step (1-4)；
(1-6) integrated control system of kth distributed power source is first according to the η receivedTOL
Value and the V of kth distributed power sourceDGInquire about its subinterval, and selected corresponding with subinterval
Distributed power source power factor controlling is interval；
If the distributed power source power factor controlling that the cos ψ ＞ of kth distributed power source is selected
Interval higher limit, then the integrated control system of kth distributed power source controls kth distribution
The power supply of formula power supply is idle goes out force value increases c every time T, until cos ψ≤and selected distribution
Till the higher limit of formula electrical source power factor control interval；
If the distributed power source power factor controlling that the cos ψ ＜ of kth distributed power source is selected
Interval lower limit, then the integrated control system of kth distributed power source controls kth distribution
The power supply of formula power supply is idle to be gone out force value and reduces c every time T, until cos ψ >=and selected distribution
Till the lower limit of formula electrical source power factor control interval；
Make k value increase by 1, proceed to step (1-4)；
(1-7) as k ＜ n, make k value increase by 1, return step (1-4)；Otherwise, postpone
Within 15 minutes, proceed to step (1-1).
The present invention is the load level from power distribution network and distributed power source grid-connected point voltage level
Two dimensions regulate the idle of distributed power source and exert oneself.
According to distribution feeder load level, (feeder line carries capacity rate η to the present inventionTOL) and distributed electrical
Source grid-connected point voltage level (voltage VDG) two dimensions, coupling makes distributed power source merit
Rate factor optimal control is interval, and the formulation of distributed power source power factor optimization control interval is depended on
In distribution feeder load level and distributed power source two dimensions of grid-connected point voltage level, to promote
Enter the idle reactive power flow tried hard in minimizing power distribution network of distributed power source regulation, to solve containing distribution
Saving energy and decreasing loss and the problem of regulating and controlling voltage in the power distribution network of formula power supply.It is contemplated that feeder line is worked as
Front load level and distributed power source grid-connected point voltage level, thus can dynamically regulate distributed
The reactive power of power supply, and then the fluctuation reducing its power output brought the shadow to power distribution network
Ring, and safe operation under voltage Qualification.Meanwhile, distributed power source can be made full use of
The Reactive-power control ability of self, it is to avoid the situation of reactive-load compensation equipment frequent switching.
Therefore, the present invention have effectively slow down in the power distribution network containing distributed power source distributed
The voltage pulsation that electrical network is brought by the fluctuation that power is exerted oneself and the impact of loss, be conducive to
The quality of voltage of power distribution network and saving energy and decreasing loss；The distributed power source bidimensional control method of the present invention,
Can be in conjunction with the regulating power of load level in network and distributed power source self to reduce nothing
Merit compensates the switching frequency of equipment, reduces the loss of network further, improves the voltage of user side
The feature of quality.
As preferably, described VaInterval be [1.018VN, 1.022VN], VbInterval
For [1.048VN, 1.052VN]。
As preferably, the interval of described c is [1.5kvar, 2.5kvar].
As preferably, the interval of T is [0.01 second, 0.015 second].
Therefore, there is advantages that
(1) effectively slow down the Distributed Generation in Distribution System power containing distributed power source to go out
The voltage pulsation that electrical network is brought by the fluctuation of power and the impact of loss, the beneficially electricity of power distribution network
Pressure quality and saving energy and decreasing loss；
(2) can be in conjunction with load level in network and the regulating power of distributed power source self
To reduce the switching frequency of reactive-load compensation equipment, reduce the loss of network further, improve user
The quality of voltage of side.
Accompanying drawing explanation
Fig. 1 is a kind of flow chart of embodiments of the invention；
Fig. 2 is a kind of topological structure schematic diagram of the 10kV electrical network of the present invention.
In figure: feeder line 1, distributed power source 2, transformer 3, shaft tower 4.
Detailed description of the invention
The present invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings.
Embodiment as shown in Figure 2 is the two of a kind of Distributed Generation in Distribution System power factor
Dimension control method, power distribution network includes the 10kV feeder line 1 drawn from transformer station, is linked into 10kV
5 distributed power sources 2 on feeder line and 43 distribution transformers 3 and 40 are used for supporting feedback
The shaft tower 4 of line, depicts 4 shaft towers in Fig. 2；Distributed power source site are equipped with voltage
Transformer and current transformer, each distributed power source is equipped with integrated control system, collection
Become control system all include computer and with each transformer electromagnetic coupled for data acquisition
Various measuring instrumentss；The integrated control system of each distributed power source is all and grid dispatching center
The communication connection of main website control system；
As it is shown in figure 1, comprise the steps:
Step 100, in main website control system, storage has the model of each feeder line, information and operation number
According to；For certain feeder line, there are 5 distributed power sources, the numbering of each distributed power source if accessing
For k, k=1 ..., the initial value of 5, k is 1；The main website control system meter by transformer station
Amount equipment obtains total burden with power P of this feeder lineL, and read this feedback of storage in its database
Distribution transformer total capacity S of lineTOL；The rated voltage of each distributed power source is VN,
It is respectively stored in its integrated control system；
Step 200, main website control system utilizes formulaCalculate this feeder line and carry capacity rate
ηTOL, and feeder line is carried capacity rate ηTOLIt is transferred to the integrated control system of each distributed power source；
Step 300, is equipped with voltage in the integrated control system of 5 distributed power sources and is satisfied with district
Between [VN, 1.07VN], and voltage is satisfied with interval is all divided into three subintervals
[VN, Va)、[Va, Vb)、[Vb, 1.07VN], VN＜ Va＜ Vb＜ 1.07VN；
The integrated control system of each distributed power source stores to have and is satisfied with sub-district with each voltage
Between corresponding following power factor optimization control interval:
Work as ηTOL＜ 0.30 and VN≤VDG＜ VaTime, power factor optimization control interval is [stagnant
Rear 0.90, delayed 0.98]；
Work as ηTOL＜ 0.30 and Va≤VDG≤Vb, power factor optimization control interval is [delayed
0.96, advanced 0.97]；
Work as ηTOL＜ 0.30 and Vb＜ VDG≤1.07VN, power factor optimization control interval be [1,
Advanced 0.95]；
Work as ηTOL>=0.30 and VN≤VDG＜ Va, power factor optimization control interval is [delayed
0.85, delayed 0.95]；
Work as ηTOL>=0.30 and Va≤VDG≤Vb, power factor optimization control interval is [delayed
0.93, advanced 0.99]；
Work as ηTOL>=0.30 and Vb＜ VDG≤1.07VN, power factor optimization control interval is
[delayed 0.99, advanced 0.97]；VDGRepresent the grid-connected point voltage of each distributed power source；
Step 400, the integrated control system of kth distributed power source passes through each measuring instruments
Measure power-factor cos ψ and voltage VDGAnd be acquired and store；
Step 500, the voltage V that the integrated control system of kth distributed power source will collectDG
It is satisfied with interval with its voltage to compare, works as VDGWhen being positioned at the satisfied interval of its voltage, proceed to step
Rapid 600；
Work as VDG＞ 1.07VNTime, integrated control system send instruction control this distributed power source with
Maximum under-excitation ability runs；
Work as VDG＜ VNTime, integrated control system sends instruction and controls this distributed power source with maximum
Phase ability is run late；Make k value increase by 1, proceed to step 400；
Step 600, the integrated control system of kth distributed power source first basis receives
ηTOLValue and the V of kth distributed power sourceDGInquire about its subinterval, and selected and subinterval pair
The distributed power source power factor controlling answered is interval；
If the distributed power source power factor controlling that the cos ψ ＞ of kth distributed power source is selected
Interval higher limit, then the integrated control system of kth distributed power source controls kth distribution
The power supply of formula power supply is idle goes out force value increases c every time T, until cos ψ≤and selected distribution
Till the higher limit of formula electrical source power factor control interval；
If the distributed power source power factor controlling that the cos ψ ＜ of kth distributed power source is selected
Interval lower limit, then the integrated control system of kth distributed power source controls kth distribution
The power supply of formula power supply is idle to be gone out force value and reduces c every time T, until cos ψ >=and selected distribution
Till the lower limit of formula electrical source power factor control interval；
Make k value increase by 1, proceed to step 400；
Step 700, as k ＜ 5, makes k value increase by 1, returns step 400；Otherwise, postpone
Within 15 minutes, proceed to step 100.
In the present embodiment, VaFor 1.02VN, VbFor 1.05VN.C be 2kV, T be 0.01
Second.Total burden with power PLFor 5984kW, distribution transforming total capacity STOLFor 9360kVA, ηTOL
It is 0.6393；
Wherein, the 1st distributed power source site rated voltage are 10kV, the 1st distribution
The satisfied interval of the voltage of formula power supply is [10.0kV, 10.7kV], then its three subintervals are respectively
[10.0kV, 10.2kV), [10.2kV, 10.5kV) and [10.5kV, 10.7kV]；
The power-factor cos ψ of the 1st distributed power source is delayed 0.95, voltage VDGFor
10.04kV；Because 10.04kV is in [10.0kV, 10.7kV], therefore perform step 600；
Because 0.6393 ＞ 0.30,10.0kV ＜ 10.04kV ＜ 10.2kV, then select power because of
Number optimal control is interval [delayed 0.85, delayed 0.95], and cos ψ is delayed 0.95, cos ψ
In [delayed 0.85, delayed 0.95] is interval, therefore need not regulate；
2nd distributed power source to the idle regulation and control flow process of the 5th distributed power source also according to step
Rapid 100 to 700 regulations.
A section for heavier loads is controlled effect analysis, and table 1 gives two kinds of controls
The Comparative result of scheme processed, wherein scheme 1 is the base controlled at conventional low dynamic passive compensation
The superposition distributed electrical active power factor bidimensional control method of the present invention on plinth, scheme 2 is single
Pure conventional low dynamic passive compensation controls, i.e. distributed power source is not involved in idle regulation and control.
Table 1 Comparative result 1
As shown in Table 1: first, scheme 1 is used to decline than employing scheme 2 circuit active loss
13.58%；Secondly, the switching frequency of employing scheme 1 reactive-load compensation equipment only has 1 time, and adopts
21 times are reached by switching frequency by scheme 2；Finally, scheme 1 not node is used to occur
The underproof phenomenon of voltage, and use scheme 2 to have 4 nodes that the underproof phenomenon of voltage occurs.
It was now a sampled point with 15 minutes, gathers 96 data and simulate power distribution network one day
Ruuning situation.Data and the situation of control of each sampled point are all consistent with above-mentioned example, converge
Close arrangement and obtain table 2 result.Wherein scheme 1 is to control at conventional low dynamic passive compensation
On the basis of combine the bidimensional control method of the present invention, the dynamic nothing of conventional low that scheme 2 is simple
Merit compensates and controls.
Table 2 Comparative result 2
As shown in Table 2: first, after the ruuning situation of one day power distribution network of simulation, scheme 1 is used
14.06% is declined than employing scheme 2 line loss electricity；Secondly, the idle benefit of scheme 1 is used
The switching frequency relative plan 2 repaying equipment declines 39.79%；Finally, scheme 1 whole day is used
There is not the underproof phenomenon of voltage in node, and uses scheme 2 to have 48 minor nodes to occur
The underproof phenomenon of voltage, during wherein the defective total degree of voltage refers to the operation of power distribution network whole day
The underproof number of times of node voltage occurs.
By the above results can illustrate use the present invention Distributed Generation in Distribution System power because of
The bidimensional control method of number can solve the problem that regulating and controlling voltage and the problem of saving energy and decreasing loss in power distribution network,
The situation of reactive-load compensation equipment frequent switching, and beneficially power distribution network can be avoided on certain procedures
Quality of voltage.
Should be understood that the present embodiment is merely to illustrate the present invention rather than limits the model of the present invention
Enclose.In addition, it is to be understood that after having read the content that the present invention lectures, those skilled in the art
Can make various changes or modifications the present invention, these equivalent form of values fall within appended by the application equally
Claims limited range.
Claims (4)
1. a bidimensional control method for Distributed Generation in Distribution System power factor, described in join
Electrical network includes the 10kV feeder line (1) drawn from transformer station, if being linked on 10kV feeder line
Dry distributed power source (2) and several distribution transformers (3)；Distributed power source site
Being equipped with voltage transformer and current transformer, each distributed power source is equipped with integrated control
System processed, integrated control system all includes computer and the use with each transformer electromagnetic coupled
Various measuring instrumentss in data acquisition；The integrated control system of each distributed power source is all with electric
The main website control system communication connection of net control centre；It is characterized in that, comprise the following steps:
(1-1) in main website control system, storage has the model of each feeder line, information and service data；
For certain feeder line, there is n distributed power source if accessing, the numbered k of each distributed power source,
K=1 ..., the initial value of n, k is 1；The main website control system measuring equipment by transformer station
Obtain total burden with power P of this feeder lineL, and read in its database the joining of this feeder line of storage
Piezoelectric transformer total capacity STOL；The rated voltage of each distributed power source is VN, deposit respectively
Storage is in its integrated control system；
(1-2) main website control system utilizes formulaCalculate this feeder line and carry capacity rate ηTOL,
And feeder line is carried capacity rate ηTOLIt is transferred to the integrated control system of each distributed power source；
(1-3) integrated control system of n distributed power source is equipped with the satisfied interval of voltage
[VN, 1.07VN], and voltage is satisfied with interval is all divided into three subintervals
[VN, Va)、[Va, Vb)、[Vb, 1.07VN], VN＜ Va＜ Vb＜ 1.07VN；
The integrated control system of each distributed power source stores to have and is satisfied with sub-district with each voltage
Between corresponding following power factor optimization control interval:
Work as ηTOL＜ 0.30 and VN≤VDG＜ VaTime, power factor optimization control interval is [stagnant
Rear 0.90, delayed 0.98]；
Work as ηTOL＜ 0.30 and Va≤VDG≤Vb, power factor optimization control interval is [delayed
0.96, advanced 0.97]；
Work as ηTOL＜ 0.30 and Vb＜ VDG≤1.07VN, power factor optimization control interval be [1,
Advanced 0.95]；
Work as ηTOL>=0.30 and VN≤VDG＜ Va, power factor optimization control interval is [delayed
0.85, delayed 0.95]；
Work as ηTOL>=0.30 and Va≤VDG≤Vb, power factor optimization control interval is [delayed
0.93, advanced 0.99]；
Work as ηTOL>=0.30 and Vb＜ VDG≤1.07VN, power factor optimization control interval is
[delayed 0.99, advanced 0.97]；VDGRepresent the grid-connected point voltage of each distributed power source；
(1-4) integrated control system of kth distributed power source is surveyed by each measuring instruments
Amount power-factor cos ψ and voltage VDGAnd be acquired and store；
(1-5) the voltage V that the integrated control system of kth distributed power source will collectDG
It is satisfied with interval with its voltage to compare, works as VDGWhen being positioned at the satisfied interval of its voltage, proceed to step
Suddenly (1-6)；
Work as VDG＞ 1.07VNTime, integrated control system send instruction control this distributed power source with
Maximum under-excitation ability runs；
Work as VDG＜ VNTime, integrated control system sends instruction and controls this distributed power source with maximum
Phase ability is run late；Make k value increase by 1, proceed to step (1-4)；
(1-6) integrated control system of kth distributed power source is first according to the η receivedTOL
Value and the V of kth distributed power sourceDGInquire about its subinterval, and selected corresponding with subinterval
Distributed power source power factor controlling is interval；
If the distributed power source power factor controlling that the cos ψ ＞ of kth distributed power source is selected
Interval higher limit, then the integrated control system of kth distributed power source controls kth distribution
The power supply of formula power supply is idle goes out force value increases c every time T, until cos ψ≤and selected distribution
Till the higher limit of formula electrical source power factor control interval；
If the distributed power source power factor controlling that the cos ψ ＜ of kth distributed power source is selected
Interval lower limit, then the integrated control system of kth distributed power source controls kth distribution
The power supply of formula power supply is idle to be gone out force value and reduces c every time T, until the distribution that cos ψ ＞ is selected
Till the lower limit of formula electrical source power factor control interval；
Make k value increase by 1, proceed to step (1-4)；
(1-7) as k ＜ n, make k value increase by 1, return step (1-4)；Otherwise, postpone
Within 15 minutes, proceed to step (1-1).
The bidimensional control of Distributed Generation in Distribution System power factor the most according to claim 1
Method processed, is characterized in that, described VaInterval be [1.018VN, 1.022VN], VbValue
Interval is [1.048VN, 1.052VN]。
The bidimensional control of Distributed Generation in Distribution System power factor the most according to claim 1
Method processed, is characterized in that, the interval of described c is [1.5kvar, 2.5kvar].
4. according to the Distributed Generation in Distribution System power factor described in claim 1 or 2 or 3
Bidimensional control method, it is characterized in that, the interval of T is [0.01 second, 0.015 second].
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