CN109787245A - A kind of microgrid reactive power compensation device configuration method based on control characteristic and economy - Google Patents
A kind of microgrid reactive power compensation device configuration method based on control characteristic and economy Download PDFInfo
- Publication number
- CN109787245A CN109787245A CN201910081321.1A CN201910081321A CN109787245A CN 109787245 A CN109787245 A CN 109787245A CN 201910081321 A CN201910081321 A CN 201910081321A CN 109787245 A CN109787245 A CN 109787245A
- Authority
- CN
- China
- Prior art keywords
- load
- capacity
- reactive
- microgrid
- compensation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- Y02E40/10—Flexible AC transmission systems [FACTS]
-
- 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
Abstract
The microgrid reactive power compensation device configuration method based on control characteristic and economy that the invention discloses a kind of, the information of micro-grid system is obtained from Power System Planning department, the scale and structure, power supply installation situation, load capacity distribution and load character information including system of micro-grid system, as unit of feeder line, based on in-situ balancing and it is conveniently adjusted voltage principle, proposes the mixing Optimal Reactive Power Allocation scheme of shunt capacitor and SVG；It is repeatedly calculated in reactive capability configuration process using the trend profile data under different running method, different load level, review verification is carried out to program results, the reactive compensation capacity cooked up is made to cope with different situations in actual operation.The present invention relates to the microgrid reactive power allocation problems of Engineering Oriented demand, effectively improve the economy and flexibility of reactive compensation configuration, provide new thinking and technology path for microgrid safety and stability economical operation in Practical Project.
Description
Technical field
The invention belongs to microgrid planning technology fields, and in particular to a kind of microgrid reactive power based on control characteristic and economy
Compensation device configuration method.
Background technique
Effective mode of management of the microgrid as distributed power generation resource, adjustable with flexible, active/idle difference of installing,
The advantages that active power responds.It is unstable that microgrid can solve single micro- source intermittence by energy storage device and global controller
Property the problem of, so that multiple micro- sources is incorporated to distribution system in whole schedulable mode, to improve power supply reliability and electric energy matter
Amount.Although a large amount of power electronics interfaces (such as rectification, inverter) installed in microgrid have idle fan-out capability, existing
Do not allow still to carry out reactive compensation using micro- source port under standard.In order to avoid no-power vacancy microgrid quality of voltage is caused it is unfavorable
It influences, needs to install additional reactive source.Further, since distributed generation resource inverter circuit and control circuit clamp down on effect in microgrid
And energy storage device is difficult to respond rapidly to, when higher level's power grid disturbs, microgrid cannot provide the voltage support of moment.Pass through
Rationally installing reactive power compensator can preferably solve the above problems.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of based on adjusting
The microgrid reactive power compensation device configuration method of characteristic and economy improves the economy and flexibility of reactive compensation configuration, is real
Existing microgrid reactive power distributes offer decision-making foundation rationally.
The invention adopts the following technical scheme:
A kind of microgrid reactive power compensation device configuration method based on control characteristic and economy, from Power System Planning department
Obtain the information of micro-grid system, scale including system and structure, power supply installation situation, the load capacity of micro-grid system be distributed and
Load character information based on in-situ balancing and is conveniently adjusted voltage principle, is proposed shunt capacitor and SVG as unit of feeder line
Mixing Optimal Reactive Power Allocation scheme；Electric power system tide calculation method is used in reactive capability configuration process, to configuration side
Case is verified, and OPTIMAL REACTIVE POWER capacity configuration scheme is selected to meet actual motion demand.
Specifically, the load that accesses and distributed generation resource total capacity on statistics feeder line, load and net load are calculated separately
Power factor calculates the reactive capability for needing to compensate according to grid-connected power factor
Further, reactive compensation capacity needed for feeder loadIt calculates as follows:
Wherein,WithFor active and load or burden without work difference maximum below feeder line, the feeder line and higher level's power grid grid entry point
Power factor be limited between-λ~λ.
Specifically, reactive capability configuration method the following steps are included:
S301, according to the composition situation of load capacity below the microgrid feeder line of acquisition, calculate common load and sensitive load
Capacity accounting ω1And ω2；
S302, calculated using the ratio of two type loads and total reactive compensation capacity the shunt capacitor group for needing to install and
The respective compensation capacity Q of SVGFCAnd QSVG。
Further, the capacity accounting ω of common load and sensitive load1And ω2It calculates as follows:
Wherein:Indicate the capacity of each common load under microgrid feeder line,Indicate each sensitivity
The capacity of load, N1For the common load quantity under the feeder line, N2For the sensitive load quantity under the feeder line.
Further, the compensation capacity Q of shunt capacitor group and SVGFCAnd QSVGIt calculates as follows:
Wherein,For reactive compensation capacity needed for feeder load.
Specifically, the reactive power compensator being calculated is mounted on transformer low voltage in the way of centralized compensation respectively
The mode SVG of side and dispersion compensation is arranged at sensitive load, and capacitor arrangement is being arranged in conventional load according to load capacity
Place accesses principle are as follows: configures SVG for sensitive load；Shunt capacitor is directly accessed root node belonging to feeder line, according to
SVG is linked into position identical with capacitor by centralized compensation mode；According to dispersion compensation mode, according to each under feeder line
The ratio of class sensitive load, divides the SVG capacity of configuration in proportion, is then linked into respectively where corresponding sensitive load
Node location.
Specifically, the Zbus tidal current computing method based on principle of stacking, carries out trend verifying using iterative method, utilizes simulation
It runs obtained node voltage result to assess various allocation plans, island mode and grid-connect mode are respectively adopted on voltage
Lower limit requires, and selects out optimal case after comprehensive comparison.
Further, the specific steps are as follows:
S501, the basic parameter for reading in micro-grid system, the line impedance parameter of the network topology including microgrid, each node
The injecting power of load and distributed generation resource；
S502, according to topology information, form the node admittance battle array Y for not including ground branchnWith the admittance pair of ground branch
Angle battle array Yn0, while setting the number of iterations is 1, given voltage iterative initial value；
S503, the node voltage after each node Injection Current and iterative calculation is calculated；
S504, convergence judgement is carried out, S506 is transferred to if meeting the condition of convergence, is otherwise transferred to S505；
S505, amendment node voltage, update the number of iterations；
S506, clearing system calculation of tidal current simultaneously export；
S507, by verification Scheme of Reactive Power Compensation in, select the smallest scheme of reactive compensation capacity as optimal side
Case.
Further, the voltage vector vector in S503, after+1 iteration of kthIt calculates as follows:
Kth time iteration terminates the i-th component of posterior nodal point Injection Current vector vectorIt calculates as follows:
Wherein: YnFor the node admittance battle array not comprising ground branch,Terminate posterior nodal point Injection Current for kth time iteration
Vector vector, Yn0For the admittance diagonal matrix of ground branch, E is the column vector that element value is all 1,For balance nodes voltage,
Indicate the i-th component in voltage vector vector；For i-th of component in current phasor vector；SiIndicate the injection function of node i
Rate.
Compared with prior art, the present invention at least has the advantages that
A kind of microgrid reactive power compensation device configuration method based on control characteristic and economy of the present invention provides synthesis and examines
The practical approach for considering the microgrid reactive power compensation device configuration of control characteristic and economy can effectively solve that microgrid reactive power optimization is matched
The problem of setting improves the power quality and returns of investment of microgrid, it then follows " in-situ balancing " and " being conveniently adjusted voltage " two is basic
Principle carries out reactive capability configuration as unit of feeder line；It is negative using different running method, difference in reactive capability configuration process
Trend profile data under lotus level is repeatedly calculated, and is carried out review verification to program results, is made the reactive compensation cooked up
Capacity can flexibly cope with different situations in actual operation.
Further, it is calculated according to grid-connected power factor and needs the reactive capability that compensates, it then follows " in-situ balancing " principle is
For the Rational Simplification method of microgrid reactive power capacity configuration.It before optimizing configuration needs that load curve is investigated, i.e.,
Its known active power is required according to the limitation of grid-connected power factor, then can need to compensate according to the determination of active-idle relationship
Reactive capability.
Further, the setting of the step of reactive capability configuration method is carried out according to total-separation structure, first according to entire
The structure and demand of microgrid calculate the idle total capacity needed to configure；Secondly reasonability point is carried out to total capacity according to part throttle characteristics
Match, generates different schemes；Trend Security Checking is carried out to different schemes again, the scheme of influence system safety is rejected, in residue
Optimal solution is chosen in scheme.Such setting has taken into account safety and economy, has good guidance value.
Further, it is mounted on step down side in the way of centralized compensation, is former with reference to the idle configuration of substation
Then as a result, carrying out unified reactive compensation to entire feeder line；SVG is arranged at sensitive load in the way of dispersion compensation,
It is the feature for being easy more lower limit to the high request and radiation type feeder terminal voltage of quality of voltage based on sensitive load, to carry out
Targeted point compensation.
Further, the method for operation of micro-capacitance sensor is more flexible changeable for bulk power grid, therefore configures idle
Capacity needs to meet the service requirement under more multi-operating condition, and this requires different operation sides are utilized during idle planning
Trend profile data under formula, different load level is repeatedly calculated, and carries out review verification to program results, makes every effort to plan
The reactive compensation capacity gone out given in scheme can satisfy the idle need flexibly coped under different situations in actual motion from now on
It asks, is easy to implement the adjustment to system voltage, so the present invention carries out trend verifying using iterative method, screen idle configuration side
Case.
In conclusion effectively improving reactive compensation the present invention relates to the microgrid reactive power allocation problem of Engineering Oriented demand and matching
The economy and flexibility set provide new thinking and technology path for microgrid safety and stability economical operation in Practical Project.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is configuration method flow chart of the present invention.
Specific embodiment
In order to improve the power quality and returns of investment of microgrid, wanted for the form of reactive power compensator, capacity and characteristic
Calculation method expansion research is asked, the present invention proposes a kind of microgrid reactive power compensation device reality for comprehensively considering control characteristic and economy
With configuration method, it is intended to be provided with by the science decision that the configuration method analysis to reactive power compensator is intelligent micro-grid planning
The data supporting and practical basis of effect.Configuration method according to the present invention is on the actual application in designing institute.
A kind of microgrid reactive power compensation device configuration method based on control characteristic and economy of the present invention is single with feeder line
Position is based on two principles of " in-situ balancing " and " being conveniently adjusted voltage ", proposes that the mixing of shunt capacitor and SVG are idle optimal
Allocation plan.Meanwhile the trend section number in reactive capability configuration process using different running method, different load under horizontal
According to repeatedly being calculated, review verification is carried out to program results, enables the reactive compensation capacity cooked up in actual operation
Flexibly reply different situations.The present invention can greatly improve the economy and flexibility of reactive compensation configuration, be intelligent micro-grid
The science decision of planning provides effective data supporting and practical basis.
Referring to Fig. 1, a kind of microgrid reactive power compensation device configuration method based on control characteristic and economy of the present invention, packet
Include following steps:
S1, the information that micro-grid system is obtained from Power System Planning department, scale and structure, power supply installation including system
Situation, load capacity distribution and load character, organize above-mentioned relevant information as unit of feeder line；
S2, the idle planning principles according to " in-situ balancing ", are studied respectively as unit of feeder line, count feeder line respectively
The load of upper access and distributed generation resource total capacity, calculate separately the power factor of load and net load, then respectively according to
0.95,0.97 and 0.99 3 grid-connected power factor calculates the reactive capability for needing to compensate；
Its calculation method is such as shown in (1):
Wherein, maximum active and load or burden without work is respectively below the feeder lineWithThe feeder line and higher level's power grid are simultaneously
The power factor of site is limited between-λ~λ (corresponding 0.95,0.97 and 0.99 etc.),Nothing needed for indicating feeder load
Function compensation capacity.
It is not carried out according to 0.95,0.97 and 0.99 3 power factor in actual application process, user can basis
The setting value is adjusted flexibly in the case where capacity and higher level's power grid of transformer.It configures to obtain reactive capability by in-situ balancing principle
With postponing, two kinds of principles of centralized compensation and dispersion compensation are respectively adopted and carry out idle configuration, grid-connected and isolated island is transported respectively later
The operating condition of row typical case's day is simulated, and can suitably change voltage operation during carrying out idle work optimization to typical day
Boundary value, count different schemes under operating condition of the system under typical day, typical all the period of time day can be guaranteed by therefrom selecting out
The scheme of safe operation selects the smallest scheme of reactive compensation capacity if whole schemes are all satisfied requirement.
S3, on the basis of step S2 completes total reactive compensation capacity, consider wherein different type reactive power compensator it is each
From capacity accounting；
The type of load character and distributed generation resource on each feeder line is analyzed, the ratio of sensitive load on feeder line is calculated
Weight, and distribute SVG capacity and capacity of capacitor bank according to this ratio, sensitive load configure static reactive generator (SVG) and
Non-sensitive configuration of load capacitor (FC) accounts for the proportion of specific gravity the change SVG and capacitor of total load by adjusting sensitive load；
Reactive capability distribution method based on load configuration characteristic is as follows:
S301, below the microgrid feeder line according to acquired in step S1 load capacity composition situation, calculate common load with
The capacity accounting ω of sensitive load1And ω2It is as follows
Wherein:Indicate the capacity of each common load under microgrid feeder line,Indicate each quick
Feel the capacity of load, N1For the common load quantity under the feeder line, N2For the sensitive load quantity under the feeder line.
S302, calculated using the ratio of two type loads and total reactive compensation capacity the shunt capacitor group for needing to install and
The respective compensation capacity Q of SVGFCAnd QSVG。
S4, the reactive power compensator being calculated in step S3 is all mounted on change in the way of centralized compensation respectively
The mode SVG of depressor low-pressure side and dispersion compensation is arranged at sensitive load, and capacitor arrangement is arranged according to load capacity
At conventional load, a variety of idle allocation plans are formed；
It accesses principle are as follows: the operation of sensitive load is influenced big by access point voltage, should remain to greatest extent corresponding
The stabilization of access point voltage, therefore SVG is configured for sensitive load；Shunt capacitor is directly accessed root section belonging to feeder line
Point, if SVG can be also coupled to position identical with capacitor using centralized compensation mode；If using dispersion compensation
Mode can also divide in proportion the SVG capacity of configuration, then respectively will according to the ratio of one kind sensitive load every under feeder line
It is linked into the node location where corresponding sensitive load.
S5, under the Run-time scenario of typical day, trend verification is carried out to the idle allocation plan that is formed in step S4 respectively
It calculates, and the node voltage result obtained using dry run assesses various allocation plans, island mode and grid-connected
The requirement of voltage bound is respectively adopted in mode, requires to be relaxed to the reactive voltage of island mode, select out after comprehensive comparison most
Excellent scheme；
The node admittance matrix to form micro-grid system, knot are calculated by the essential information of each route acquired in step S1
The related operation data for closing typical day day part completes Load flow calculation.
The tidal current computing method that the present invention uses in trend verifying is the Zbus tidal current computing method based on principle of stacking,
It is calculated using iterative method, the iterative formula of voltage are as follows:
Wherein:Indicate the voltage vector vector after+1 iteration of kth,Indicate the in voltage vector vector
I component；Indicate that kth time iteration terminates posterior nodal point Injection Current vector vector,For i-th point in current phasor vector
Amount；YnFor the node admittance battle array not comprising ground branch, Yn0Indicate that the admittance diagonal matrix of ground branch, E are that element value is all 1
Column vector,For balance nodes voltage, SiIndicate the injecting power of node i.
Key step includes:
S501, the basic parameter for reading in micro-grid system, the line impedance parameter of the network topology including microgrid, each node
The injecting power of load and distributed generation resource；
S502, according to topology information, form the node admittance battle array Y for not including ground branchnWith the admittance pair of ground branch
Angle battle array Yn0, while setting the number of iterations is 1, given voltage iterative initial value；
S503, each node Injection Current is calculated using formula (7), utilizes the node voltage after the iterative calculation of formula (6) meter；
S504, convergence judgement is carried out, S506 is transferred to if meeting the condition of convergence, is otherwise transferred to S505；
S505, amendment node voltage, update the number of iterations；
S506, clearing system calculation of tidal current simultaneously export；
S507, by verification Scheme of Reactive Power Compensation in, select the smallest scheme of reactive compensation capacity as optimal side
Case.
In engineer application, related technical personnel can be different according to requirement of the load to power quality is accessed in microgrid,
Make the economy of reactive compensation and operation special using the matched reactive power compensator of method choice provided by the invention
Property meets design requirement.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being described and shown in usually here in attached drawing is real
The component for applying example can be arranged and be designed by a variety of different configurations.Therefore, below to the present invention provided in the accompanying drawings
The detailed description of embodiment be not intended to limit the range of claimed invention, but be merely representative of of the invention selected
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment
1) example structure
Reactive capability distributes the appearance for seeking to that reactive power compensator is further cooked up on certain topological structure rationally
Amount and its on-position.The grid structure that this example is chosen has 2 feeder lines, and feed connection node number is respectively 6 and 4.According to front
The method of introduction, it is necessary first to calculate and be equipped on each feeder line according to the composition of each feeder load using each feeder line as research object
The specific gravity of FC and SVG is determined on feeder line then using the peak load information of typical day according to the grid-connected power factor of setting
Reactive power compensator total capacity further determines that the respective fitted capacity of FC and SVG in conjunction with aforementioned specific gravity.
2) centralized compensation mode configuration result
Capacitor (FC) and static reactive generator (SVG) are mounted on the root of each radiation type feeder by centralized compensation mode
Under node, this is similar with conventional electrical distribution net substation's reactive capability configuration mode, has very strong engineering practicability.According to concentration
Compensation principle selects to carry out reactive compensation under different compensativities, and the results are shown in Table 1 for provisioned reactive compensation capacity, with
The configuration capacity of the increase of compensation power factor, FC and SVG are also continuously increased, and the sensitivity in the configuration capacity and system of SVG is negative
Lotus capacity is directly related, does not have sensitive load in feeder line 2 so the configuration capacity of its SVG is 0, reactive compensation is all held by capacitor
Load.
When compensativity is 0.95~0.99, there are not the feelings of voltage out-of-limit near 1 in each node voltage per unit value
Condition, compensativity is higher, and voltage fluctuation is smaller, and compensation effect is better, but reactive compensation capacity also correspondinglys increase, and economy is deteriorated.
In engineer application, since three kinds of compensativity lower node voltages are all in limitation range, it is contemplated that economic factors, using nothing
The smallest scheme of function compensation capacity, that is, select compensativity for 0.95 reactive compensation allocation plan.
Each feeder line reactive compensation capacity calculated result (unit: kVar) under the different compensativities of table 1
3) dispersion compensation mode configuration result
Since voltage problem is local problem, radiation type feeder is easiest to the position that voltage crosses the border occur to be radiation type feeder
End, in combination with the position of sensitive load.When dispersion compensation respectively by capacitor (FC) and static reactive generator (SVG)
It is mounted on end and the sensitive load place node of feeder line, idle fixed point, quantitative compensation is realized, improves the effect of compensation.It presses
According to dispersion compensation principle, selects to carry out reactive compensation under different compensativities, SVG is distributed at sensitive load, provisioned nothing
The results are shown in Table 2 for function compensation capacity.
Similar with the result of dispersion compensation, when compensativity difference, the node voltage of three is not out-of-limit, is guaranteeing voltage
Select the smallest scheme of compensation capacity to ensure economy in the case where safety.If having higher want to voltage in some cases
It asks, compensativity can be properly increased.
Each feeder line reactive compensation capacity calculated result (unit: kVar) under the different compensativities of table 2
4) compare and conclusion
The compensation capacity of centralized compensation mode and dispersion compensation mode is all based on 0.95,0.97,0.99 3 kind of power because
Several and each feeder line burdens with power, load or burden without work statistics, for SVG selection and capacity configuration all referring to each feeder line
Sensitive load amount.So two kinds of compensation ways capacitor (FC) and static reactive generator (SVG) under each power factor
Compensation capacity is identical.
The difference of two kinds of compensation models is mainly the difference of installation site, is matched under centralized compensation mode with reference to substation is idle
FC and SVG are mounted under each feeder line root node by the principle set, and unified reactive compensation is carried out to entire feeder line.And distributing is mended
Mode is repaid, being easy more lower limit and sensitive load for radiation type feeder terminal voltage has needle to the demanding premise of quality of voltage
To the point compensation of property.
If centralized compensation mode can satisfy the requirement of whole system quality of voltage, and the voltage high request of sensitive load
Also can be met by the SVG of system configuration, it is proposed that mend capacitor (FC) and static reactive generator (SVG) using concentration
The mode of repaying is installed, and installs be easier in this way, and equipment land occupation and the operation and maintenance in later period are also easier to solve.Such as
After fruit is installed concentratedly, the quality of voltage of each feeder terminal voltage and sensitive load cannot be met, then be proposed with point
The mode for dissipating compensation installs capacitor (FC) and static reactive generator (SVG), although operation and maintenance will cause in this way
The certain inconvenient but effect of reactive compensation can be more preferable, and the requirement of quality of voltage can be better met.
In short, the present invention distributes this key problem rationally for microgrid reactive power, the method proposed is to raising microgrid
Power quality and performance driving economy play positive effect.By the way that shunt capacitor, static reactive generator (SVG) etc. is comprehensively compared
The operation characteristic and economic performance of reactive power compensator are based on " in-situ balancing " and " being conveniently adjusted voltage " as unit of feeder line
Two principles, propose shunt capacitor and the mixing Optimal Reactive Power Allocation scheme of SVG.In engineer application, the relevant technologies
Personnel can be different according to requirement of the load to power quality is accessed in microgrid, can choose matched reactive compensation and fill
It sets so that the economy and operation characteristic of reactive compensation meet design requirement.Reactive voltage is required in isolated operation
The actual demand relaxed, being incorporated into the power networks with two kinds of scenes of isolated operation using different voltage qualification models in reactive voltage module
It encloses, capacitor (FC) and static reactive generator (SVG) investment totle drilling cost can be significantly reduced in this way, guarantee reactive compensation result
Economy.
In addition, paying the utmost attention to centralized compensation way in the level of reactive compensation configuration mode and being configured, if feeder line
The quality of voltage of terminal voltage and sensitive load is not able to satisfy, and need to be configured using distributing compensation way.This method can be with
The economy and flexibility for greatly improving reactive compensation configuration, have good guidance value.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (10)
1. a kind of microgrid reactive power compensation device configuration method based on control characteristic and economy, which is characterized in that from power train
Planning department of uniting obtains the information of micro-grid system, the scale and structure, power supply installation situation, load including system of micro-grid system
Capacity distribution and load character information based on in-situ balancing and are conveniently adjusted voltage principle as unit of feeder line, propose electricity in parallel
The mixing Optimal Reactive Power Allocation scheme of container and SVG；Electric power system tide calculation method is used in reactive capability configuration process,
Allocation plan is verified, OPTIMAL REACTIVE POWER capacity configuration scheme is selected to meet actual motion demand.
2. the microgrid reactive power compensation device configuration method according to claim 1 based on control characteristic and economy, special
Sign is, counts the load accessed on feeder line and distributed generation resource total capacity, calculates separately the power factor of load and net load,
The reactive capability for needing to compensate is calculated according to grid-connected power factor
3. the microgrid reactive power compensation device configuration method according to claim 2 based on control characteristic and economy, special
Sign is, reactive compensation capacity needed for feeder loadIt calculates as follows:
Wherein,WithFor active and load or burden without work difference maximum below feeder line, the function of the feeder line and higher level's power grid grid entry point
Rate factor is limited between-λ~λ.
4. the microgrid reactive power compensation device configuration method according to claim 1 based on control characteristic and economy, special
Sign is, reactive capability configuration method the following steps are included:
S301, according to the composition situation of load capacity below the microgrid feeder line of acquisition, calculate the appearance of common load and sensitive load
Measure accounting ω1And ω2；
S302, the shunt capacitor group for needing to install and SVG are calculated using the ratio and total reactive compensation capacity of two type loads
Respective compensation capacity QFCAnd QSVG。
5. the microgrid reactive power compensation device configuration method according to claim 4 based on control characteristic and economy, special
Sign is, the capacity accounting ω of common load and sensitive load1And ω2It calculates as follows:
Wherein:Indicate the capacity of each common load under microgrid feeder line,Indicate each sensitive load
Capacity, N1For the common load quantity under the feeder line, N2For the sensitive load quantity under the feeder line.
6. the microgrid reactive power compensation device configuration method according to claim 4 based on control characteristic and economy, special
Sign is, the compensation capacity Q of shunt capacitor group and SVGFCAnd QSVGIt calculates as follows:
Wherein,For reactive compensation capacity needed for feeder load.
7. the microgrid reactive power compensation device configuration method according to claim 1 based on control characteristic and economy, special
Sign is, the reactive power compensator being calculated is mounted on step down side and dispersion in the way of centralized compensation respectively
The mode SVG of compensation is arranged at sensitive load, and capacitor arrangement is arranged at conventional load according to load capacity, and access is former
Then are as follows: configure SVG for sensitive load；Shunt capacitor is directly accessed root node belonging to feeder line, according to centralized compensation
SVG is linked into position identical with capacitor by mode；According to dispersion compensation mode, according to every a kind of sensitive negative under feeder line
The ratio of lotus, divides the SVG capacity of configuration in proportion, is then linked into the node position where corresponding sensitive load respectively
It sets.
8. the microgrid reactive power compensation device configuration method according to claim 1 based on control characteristic and economy, special
Sign is that the Zbus tidal current computing method based on principle of stacking is carried out trend verifying using iterative method, obtained using dry run
Node voltage result various allocation plans are assessed, island mode and grid-connect mode are respectively adopted voltage bound and want
It asks, optimal case is selected out after comprehensive comparison.
9. the microgrid reactive power compensation device configuration method according to claim 8 based on control characteristic and economy, special
Sign is, the specific steps are as follows:
S501, the basic parameter for reading in micro-grid system, the line impedance parameter of the network topology including microgrid, the load of each node
And the injecting power of distributed generation resource；
S502, according to topology information, form the node admittance battle array Y for not including ground branchnWith the admittance diagonal matrix of ground branch
Yn0, while setting the number of iterations is 1, given voltage iterative initial value；
S503, the node voltage after each node Injection Current and iterative calculation is calculated；
S504, convergence judgement is carried out, S506 is transferred to if meeting the condition of convergence, is otherwise transferred to S505；
S505, amendment node voltage, update the number of iterations；
S506, clearing system calculation of tidal current simultaneously export；
S507, by verification Scheme of Reactive Power Compensation in, select the smallest scheme of reactive compensation capacity as optimal case.
10. the microgrid reactive power compensation device configuration method according to claim 9 based on control characteristic and economy, special
Sign is, the voltage vector vector in S503, after+1 iteration of kthIt calculates as follows:
Kth time iteration terminates the i-th component of posterior nodal point Injection Current vector vectorIt calculates as follows:
Wherein: YnFor the node admittance battle array not comprising ground branch,Terminate posterior nodal point Injection Current vector for kth time iteration
Vector, Yn0For the admittance diagonal matrix of ground branch, E is the column vector that element value is all 1,For balance nodes voltage,It indicates
The i-th component in voltage vector vector；For i-th of component in current phasor vector；SiIndicate the injecting power of node i.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910081321.1A CN109787245B (en) | 2019-01-28 | 2019-01-28 | Microgrid reactive power compensation device configuration method based on regulation characteristics and economy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910081321.1A CN109787245B (en) | 2019-01-28 | 2019-01-28 | Microgrid reactive power compensation device configuration method based on regulation characteristics and economy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109787245A true CN109787245A (en) | 2019-05-21 |
| CN109787245B CN109787245B (en) | 2020-08-18 |
Family
ID=66502684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910081321.1A Active CN109787245B (en) | 2019-01-28 | 2019-01-28 | Microgrid reactive power compensation device configuration method based on regulation characteristics and economy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109787245B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117914A (en) * | 2020-07-30 | 2020-12-22 | 上海电力安装第二工程有限公司 | Reversible power supply device for thermal construction hoisting machinery |
| CN112531724A (en) * | 2020-12-08 | 2021-03-19 | 深圳供电局有限公司 | Reactive compensation assessment method for distribution network transformer area |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001234A (en) * | 2012-11-13 | 2013-03-27 | 中国电力科学研究院 | Method for controlling reactive voltage in ultra-high voltage grid on the basis of improved economic voltage difference |
| CN103248059A (en) * | 2013-05-07 | 2013-08-14 | 广东电网公司电力科学研究院 | Reactive voltage optimization method and system for distribution network |
| CN103971026A (en) * | 2014-05-28 | 2014-08-06 | 南京工程学院 | General method for calculating tide of positive power distribution networks |
| CN103997045A (en) * | 2014-05-30 | 2014-08-20 | 中国能源建设集团广东省电力设计研究院 | Configuration method and system for reactive power compensation of wind power plant |
| EP2822135A1 (en) * | 2013-07-03 | 2015-01-07 | Siemens Aktiengesellschaft | Method and arrangement for transferring electrical power for subsea applications |
| CN104617585A (en) * | 2015-02-13 | 2015-05-13 | 东南大学 | Reactive compensation configuration method |
| CN105896560A (en) * | 2016-05-23 | 2016-08-24 | 临涣焦化股份有限公司 | Reactive power compensation optimization method |
-
2019
- 2019-01-28 CN CN201910081321.1A patent/CN109787245B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001234A (en) * | 2012-11-13 | 2013-03-27 | 中国电力科学研究院 | Method for controlling reactive voltage in ultra-high voltage grid on the basis of improved economic voltage difference |
| CN103248059A (en) * | 2013-05-07 | 2013-08-14 | 广东电网公司电力科学研究院 | Reactive voltage optimization method and system for distribution network |
| EP2822135A1 (en) * | 2013-07-03 | 2015-01-07 | Siemens Aktiengesellschaft | Method and arrangement for transferring electrical power for subsea applications |
| CN103971026A (en) * | 2014-05-28 | 2014-08-06 | 南京工程学院 | General method for calculating tide of positive power distribution networks |
| CN103997045A (en) * | 2014-05-30 | 2014-08-20 | 中国能源建设集团广东省电力设计研究院 | Configuration method and system for reactive power compensation of wind power plant |
| CN104617585A (en) * | 2015-02-13 | 2015-05-13 | 东南大学 | Reactive compensation configuration method |
| CN105896560A (en) * | 2016-05-23 | 2016-08-24 | 临涣焦化股份有限公司 | Reactive power compensation optimization method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117914A (en) * | 2020-07-30 | 2020-12-22 | 上海电力安装第二工程有限公司 | Reversible power supply device for thermal construction hoisting machinery |
| CN112531724A (en) * | 2020-12-08 | 2021-03-19 | 深圳供电局有限公司 | Reactive compensation assessment method for distribution network transformer area |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109787245B (en) | 2020-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103199549B (en) | A kind of method that Receiving-end power grid dynamic reactive power compensation equipment configuration position is selected | |
| CN107276076B (en) | A kind of two benches multiple target site selecting method of THE UPFC | |
| Jothibasu et al. | Sensitivity analysis of photovoltaic hosting capacity of distribution circuits | |
| CN106655209B (en) | The data processing method and data processing system of urban distribution network reactive voltage | |
| CN103927693A (en) | Distribution network line loss management system | |
| CN106487042A (en) | A kind of Multiple Time Scales micro-capacitance sensor voltage power-less optimized controlling method | |
| CN109038568A (en) | Voltage dip comprehensive processing method based on co-ordination of supply and demand | |
| CN106058876A (en) | Dynamic reactive planning site-selection analysis method and system considering transient voltage stability | |
| CN106712051B (en) | Low-voltage power distribution station area disperses reactive compensation and expands line footpath coordination optimization calculation method | |
| CN106655293A (en) | STATCOM (static synchronous compensator) distribution point selection method of multi-infeed alternating current-direct current system | |
| CN109787245A (en) | A kind of microgrid reactive power compensation device configuration method based on control characteristic and economy | |
| CN109146176A (en) | A kind of power distribution network congestion Dispatching Method towards the guidance of electric car electric charging service charge | |
| CN110474342A (en) | A kind of method that disturbance regulation effect assessment models building temporarily drops in distribution network voltage | |
| CN108536917A (en) | A kind of distributed computing method of transmission and distribution network overall situation Voltage Stability Control | |
| Li et al. | A general steady-state voltage stability analysis for hybrid multi-infeed HVDC systems | |
| Ghawghawe et al. | Computation of TCSC reactance and suggesting criterion of its location for ATC improvement | |
| Laïfa et al. | Optimal FACTS location to enhance voltage stability using multi-objective harmony search | |
| CN106374520A (en) | Acceptable power estimation method of distributed generation for safe and interactive scheduling | |
| Marujo et al. | Optimal management of electrical power systems for losses reduction in the presence of active distribution networks | |
| Ren et al. | A review of FACTS'practical consideration and economic evaluation | |
| Padmavathi et al. | Available transfer capability enhancement by using Particle Swarm Optimization algorithm based FACTS allocation | |
| Tapia-Tinoco et al. | Modeling of electric springs and their multi-objective voltage control based on continuous genetic algorithm for unbalanced distribution networks | |
| Krishnamurthy et al. | Performance analysis and improvement of a power system network using a Unified Power Flow Controller | |
| Esmaeili et al. | A new multiobjective optimal allocation of multitype FACTS devices for total transfer capability enhancement and improving line congestion using the harmony search algorithm | |
| CN107292539A (en) | A kind of index method for assessing regenerative resource digestion capability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |