CN110298766A - Load screening technique, device and equipment suitable for relay protection setting calculation - Google Patents
Load screening technique, device and equipment suitable for relay protection setting calculation Download PDFInfo
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Abstract
The invention discloses a kind of load screening techniques suitable for relay protection setting calculation, first obtaining voltage influence a reference value and electric current influences a reference value, and calculate voltage influence value of each load to distribution network and the electric current influence value to distribution network, it is filtered out in each load and meets the load that voltage influence value is greater than at least one condition in electric current influence a reference value greater than voltage influence a reference value and electric current influence value, the load filtered out is the load being affected to adaptive setting result, the load filtered out is included in relay protection setting calculation, not only computational accuracy is improved compared to the adaptive setting for ignoring load, adaptive setting is added also without by all loads, to reduce required calculation amount when improving the computational accuracy of adaptive setting.The invention also discloses a kind of load screening plant, equipment and readable storage medium storing program for executing suitable for relay protection setting calculation, have above-mentioned beneficial effect.
Description
Technical field
The present invention relates to Relay Protection Technology in Power System fields, are suitable for relay protection setting calculation more particularly to one kind
Load screening technique, device, equipment and readable storage medium storing program for executing.
Background technique
Relay protection setting calculation is determining protective device movement definite value, guarantees the important basic work of electric power netting safe running
Make.With the development of power industry, the scale of electric system constantly expands, and proposes to relay protection setting calculation performance higher
Requirement.
At power network development initial stage, the load accessed in electric system is smaller, since the calculation amount of adaptive setting is larger, usually
Ignore load to improve adaptive setting efficiency.With the high speed development of social economy, load is quicklyd increase in electric system, load
Influence to adaptive setting can not be ignored.If continuing to ignore load progress relay protection setting calculation, necessarily lead to biggish meter
Error is calculated, if considering these loads, huge calculation amount can be generated, and then lead to the increase of cost.
Calculation amount needed for reducing under the premise of precision to guarantee the adaptive setting of relay protection, filtering out, which influences relay, protects
The emphasis load for protecting adaptive setting result, these loads are included in adaptive setting, and ignore other loads, can both meet one
Fixed computational accuracy, and reduce required calculation amount compared to consideration full load.
And the load being affected in distribution network to relay protection setting calculation how is filtered out, it is those skilled in the art
Member's technical issues that need to address.
Summary of the invention
The object of the present invention is to provide it is a kind of suitable for the load screening technique of relay protection setting calculation, device, equipment and
Readable storage medium storing program for executing, for filtering out the load being affected in distribution network to relay protection setting calculation both to meet relay
The precision that protection seting calculates, and compared to calculation amount needed for considering full load reduction.
In order to solve the above technical problems, the present invention provides a kind of load screening technique suitable for relay protection setting calculation,
Include:
Obtaining voltage influence a reference value and electric current influences a reference value；
Calculate voltage influence value of each load to distribution network and the electric current influence value to the distribution network；
It is filtered out in each load and meets the voltage influence value greater than the voltage influence a reference value and the electricity
The load that influence value is greater than at least one condition in electric current influence a reference value is flowed, obtained load will be screened and be included in relay
During protection seting calculates.
Optionally, the acquisition voltage influence a reference value and electric current influence a reference value, specifically include:
Receive load a reference value, voltage change specified value and the curent change specified value of input；
The load a reference value and the voltage change specified value are substituted into the node voltage change before and after meter and loading effects
In change formula, the voltage influence a reference value is obtained；
The load a reference value and the curent change specified value are substituted into the branch current change before and after meter and loading effects
In change formula, obtaining the electric current influences a reference value.
Optionally, it is described meter and loading effects before and after node voltage varying type obtained especially by following manner:
Each load is equivalent to compensating current element using penalty method；
The node resistance of each compensating current element and the superimposed stacking network of first wife's electric network is established using principle of stacking
Anti- matrix；
By the nodal impedance matrix establish meter and loading effects before failure posterior nodal point voltage expression and meter and bear
Failure posterior nodal point voltage expression after lotus influence；
According to the event after the failure posterior nodal point voltage expression and the meter and loading effects before the meter and loading effects
Barrier posterior nodal point voltage expression obtains the node voltage varying type before and after the meter and loading effects.
Optionally, it is described meter and loading effects before failure posterior nodal point voltage expression specifically:
Failure posterior nodal point voltage expression after the meter and loading effects specifically:
Node voltage varying type before and after the meter and loading effects specifically:
Wherein,For the failure posterior nodal point voltage before meter and loading effects, G is the collection of active node in the distribution network
It closes, ZpjFor the mutual impedance between node p and active node j,For the Injection Current of active node j, m(n)For proportionality coefficient, Zpf
For the mutual impedance between the node p and malfunctioning node f, ZfjFor the mutual resistance between the malfunctioning node f and the active node j
It is anti-, Zff(1)For the positive sequence self-impedance of the malfunctioning node f,To add reactance,After the failure after meter and loading effects
Node voltage, L are the set of each compensating current element, ZpiFor the mutual impedance between the node p and load bus i, ZfiFor
Mutual impedance between the malfunctioning node f and the load bus i,For the node voltage variation before and after meter and loading effects
Amount.
Optionally, it is described meter and loading effects before and after branch current varying type obtained especially by following manner:
By the nodal impedance matrix establish meter and loading effects before failure after branch current expression formula and meter and bear
Branch current expression formula after failure after lotus influence；
According to branch current expression formula after the failure before the meter and loading effects and the event after the meter and loading effects
Branch current expression formula obtains the branch current varying type before and after the meter and loading effects after barrier.
Optionally, it is described meter and loading effects before failure after branch current expression formula specifically:
Branch current expression formula after failure after the meter and loading effects specifically:
Branch current varying type before and after the meter and loading effects specifically:
Wherein,For branch current after the failure before meter and loading effects, zpqFor the impedance of branch pq, G is the superposition
The set of active node, Z in networkpjFor the mutual impedance between node p and active node j, ZqjFor node q and the active section
Mutual impedance between point j,For the Injection Current of the active node j, ZpfIt is mutual between the node p and malfunctioning node f
Impedance, ZqfFor the mutual impedance between the node q and the malfunctioning node f, m(n)For proportionality coefficient, ZfjFor the malfunctioning node
Mutual impedance between f and the active node j, Zff(1)For the positive sequence self-impedance of the malfunctioning node f,To add reactance,For branch current after the failure after meter and loading effects, L is the set of each compensating current element, ZpiFor the node p
Mutual impedance between load bus i, ZqiFor the mutual impedance between the node q and the load bus i, ZfiFor the event
Hinder the mutual impedance between the node f and load bus i,For the branch current variable quantity before and after meter and loading effects.
Optionally, described to calculate each load on the voltage influence value of distribution network and on the influence of the electric current of the distribution network
Value, specifically includes:
The load value of each load is substituted into the node voltage varying type before and after the meter and loading effects, obtains each institute
State the voltage influence value of load；
The load value of each load is substituted into the branch current varying type before and after the meter and loading effects, obtains each institute
State the electric current influence value of load.
In order to solve the above technical problems, the present invention also provides a kind of loads suitable for relay protection setting calculation to screen dress
It sets, comprising:
Acquiring unit influences a reference value for obtaining voltage influence a reference value and electric current；
Computing unit, for calculating voltage influence value of each load to distribution network and the electric current shadow to the distribution network
Ring value；
Screening unit meets the voltage influence value greater than the voltage influence base for filtering out in each load
Quasi- value and the electric current influence value, which are greater than the electric current, influences the load of at least one condition in a reference value, will screen and to obtain
Load is included in relay protection setting calculation.
In order to solve the above technical problems, the present invention also provides a kind of load screenings suitable for relay protection setting calculation to set
It is standby, comprising:
Memory, for storing instruction, described instruction include being suitable for relay protection setting calculation described in above-mentioned any one
Load screening technique the step of；
Processor, for executing described instruction.
In order to solve the above technical problems, it is stored thereon with computer program the present invention also provides a kind of readable storage medium storing program for executing,
The load for being suitable for relay protection setting calculation as described in above-mentioned any one is realized when the computer program is executed by processor
The step of screening technique.
Load screening technique provided by the present invention suitable for relay protection setting calculation first obtains voltage influence a reference value
A reference value is influenced with electric current, and calculates each load of each carry calculation to the voltage influence value of distribution network and to the electricity of distribution network
Influence value is flowed, is filtered out in each load and meets voltage influence value greater than voltage influence a reference value and electric current influence value greater than electric current
The load of at least one condition in a reference value is influenced, the load filtered out is the load being affected to adaptive setting result,
The load filtered out is included in relay protection setting calculation, not only greatly improves meter compared to the adaptive setting for ignoring load
Precision is calculated, adaptive setting is added also without by all loads, thus needed for being reduced when improving the computational accuracy of adaptive setting
Calculation amount.The present invention also provides a kind of load screening plant, equipment and readable storage mediums suitable for relay protection setting calculation
Matter has above-mentioned beneficial effect, and details are not described herein.
Detailed description of the invention
It, below will be to embodiment or existing for the clearer technical solution for illustrating the embodiment of the present invention or the prior art
Attached drawing needed in technical description is briefly described, it should be apparent that, the accompanying drawings in the following description is only this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of flow chart of the load screening technique of relay protection provided in an embodiment of the present invention；
Fig. 2 is the flow chart of the specific embodiment of step S101 in a kind of Fig. 1 provided in an embodiment of the present invention；
Fig. 3 (a) is a kind of structural schematic diagram of first wife's electric network provided in an embodiment of the present invention；
Fig. 3 (b) is the structural schematic diagram of distribution network when one kind provided in an embodiment of the present invention does not consider load；
The structural schematic diagram of distribution network when Fig. 3 (c) is a kind of consideration load provided in an embodiment of the present invention；
Fig. 4 is a kind of schematic diagram of 39 node system of IEEE provided in an embodiment of the present invention；
Fig. 5 is that a kind of structure of the load screening plant suitable for relay protection setting calculation provided in an embodiment of the present invention is shown
It is intended to；
Fig. 6 is a kind of knot that equipment is calculated suitable for the load screening of relay protection setting calculation provided in an embodiment of the present invention
Structure schematic diagram.
Specific embodiment
Core of the invention is to provide load screening technique, device, equipment and the readable storage medium storing program for executing of a kind of relay protection,
For filtering out the load being affected in distribution network to relay protection setting calculation both to meet relay protection setting calculation
Precision, and compared to consider full load reduce needed for calculation amount.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is a kind of process of the load screening technique suitable for relay protection setting calculation provided in an embodiment of the present invention
Figure.
As shown in Figure 1, the load screening technique provided in an embodiment of the present invention suitable for relay protection setting calculation includes:
S101: obtaining voltage influence a reference value and electric current influences a reference value.
Voltage influence a reference value illustrate under certain computational accuracy demand allow the considerations of load before and after failure after
Node voltage variable quantity, electric current influence before and after the considerations of a reference value illustrates the permission under certain computational accuracy demand load
Branch current variable quantity after failure.
In specific implementation, the voltage influence a reference value and electric current for obtaining staff's setting influence a reference value, or obtain
Electrical network parameter, voltage influence a reference value and electric current, which is calculated, according to preset electrical network parameter influences a reference value.
S102: the voltage influence value and electric current influence value of each load are calculated.
To each load, branch current becomes after calculating the failure posterior nodal point voltage variety for considering its access front and back and failure
Change amount.
It should be noted that calculating to simplify, need to only calculating voltage influence value and electric current influence value here, the two are poor
Value.
S103: it is filtered out in each load and meets voltage influence value and be greater than greater than voltage influence a reference value and electric current influence value
Electric current influences the load of at least one condition in a reference value, and the load that screening obtains is included in relay protection setting calculation.
Check influence after each load is independently accessed to distribution network node voltage and/or to distribution network branch current
Influence whether exceed allowed band, i.e. whether the voltage influence value of the load is greater than voltage influence a reference value, the electricity of the load
Whether stream influence value, which is greater than electric current, influences a reference value, if meeting wherein at least one condition, then it is assumed that if not considering that this is negative
Lotus carries out adaptive setting, then can generate larger calculating error.
It should be noted that judging whether load influences adaptive setting result excessive in addition to above-mentioned two Rule of judgment
There can also be other Rule of judgment, if whether load value is greater than load a reference value, can specifically be set.
The load being affected to adaptive setting result filtered out is considered in adaptive setting, i.e., by the negative of the load
Charge values substitute into the adaptive setting of relay protection, and ignoring remaining influences lesser load to adaptive setting result, reach certain
Guarantee that computational accuracy does not increase the effect of calculation amount excessively again in degree.
Load screening technique provided in an embodiment of the present invention suitable for relay protection setting calculation first obtains voltage influence base
Quasi- value and electric current influence a reference value, and calculate each load of each carry calculation to the voltage influence value of distribution network and to distribution network
Electric current influence value, filtered out in each load and meet voltage influence value and be greater than greater than voltage influence a reference value and electric current influence value
Electric current influences the load of at least one condition in a reference value, filters out the load being affected to adaptive setting result, will sieve
The load selected is included in relay protection setting calculation, not only greatly improves calculating essence compared to the adaptive setting for ignoring load
Adaptive setting is added also without by all loads in degree, to reduce required meter when improving the computational accuracy of adaptive setting
Calculation amount.
Fig. 2 is the flow chart of the specific embodiment of step S101 in a kind of Fig. 1 provided in an embodiment of the present invention；Fig. 3 (a)
For a kind of structural schematic diagram of first wife's electric network provided in an embodiment of the present invention；Fig. 3 (b) is one kind provided in an embodiment of the present invention
The structural schematic diagram of distribution network when not considering load；When Fig. 3 (c) is a kind of consideration load provided in an embodiment of the present invention
The structural schematic diagram of distribution network.
On the basis of the above embodiments, in another embodiment, provided in an embodiment of the present invention whole suitable for relay protection
The step S101 for the load screening technique that devise a stratagem is calculated can specifically include:
S201: load a reference value, voltage change specified value and the curent change specified value of input are received.
If load a reference value is Ii0, voltage change specified value is D10, curent change specified value is D20。
S202: load a reference value and voltage change specified value are substituted into the node voltage varying type before and after meter and loading effects
In, obtain voltage influence a reference value.
S203: load a reference value and curent change specified value are substituted into the branch current varying type before and after meter and loading effects
In, obtaining electric current influences a reference value.
In specific implementation, the node voltage varying type before and after the meter and loading effects in step S202 is especially by following
Mode obtains:
Each load is equivalent to compensating current element using penalty method；
The node impedance square of each compensating current element and the superimposed stacking network of first wife's electric network is established using principle of stacking
Battle array；
Failure posterior nodal point voltage expression and meter and load shadow based on nodal impedance matrix foundation and before loading effects
Failure posterior nodal point voltage expression after sound；
According to the failure posterior nodal point after the failure posterior nodal point voltage expression and meter and loading effects before meter and loading effects
Voltage expression counted and loading effects before and after node voltage varying type.
The branch current varying type before and after meter and loading effects in step S203 is obtained especially by following manner:
By the nodal impedance matrix establish meter and loading effects before failure after branch current expression formula and meter and bear
Branch current expression formula after failure after lotus influence；
According to branch current expression formula after the failure before the meter and loading effects and the event after the meter and loading effects
Branch current expression formula obtains the branch current varying type before and after the meter and loading effects after barrier.
In practical applications, load i is equivalent to compensating current element I using penalty methodi, and will be accessed with principle of stacking
Network after load regards the superposition of former network and compensation network as, will not change the impedance matrix of system in this way, convenient for calculating
And analysis.
As shown in Fig. 3 (a), each node voltage is U' in first wife's electric network1、U'2……U'i……U'n, each branch current
ForLD is active node.As shown in Fig. 3 (b), when not considering load, each node voltage
ForEach branch current is After considering load
Stacking network such as Fig. 3 (c) shown in, each node voltage be Δ U1、ΔU2……ΔUi……ΔUn, superimposed compensation electric current
For IiLD。
Calculation of fault equation based on nodal impedance matrix foundation and before and after loading effects, including before meter and loading effects
Failure posterior nodal point voltage expression, the failure posterior nodal point voltage expression after meter and loading effects, before meter and loading effects
Branch current expression formula after failure after failure after branch current expression formula, meter and loading effects.
Wherein, meter and loading effects before failure posterior nodal point voltage expression specifically:
Failure posterior nodal point voltage expression after meter and loading effects specifically:
Node voltage varying type before and after meter and loading effects specifically:
Wherein,For the failure posterior nodal point voltage before meter and loading effects, G is the set of active node in distribution network,
ZpjFor the mutual impedance between node p and active node j,For the Injection Current of active node j, m(n)For proportionality coefficient, ZpfFor
Mutual impedance between node p and malfunctioning node f, ZfjFor the mutual impedance between malfunctioning node f and active node j, Zff(1)For failure
The positive sequence self-impedance of node f,To add reactance,For the failure posterior nodal point voltage after meter and loading effects, L is each compensation
The set of current source, ZpiFor the mutual impedance between node p and load bus i, ZfiBetween malfunctioning node f and load bus i
Mutual impedance,For the node voltage variable quantity before and after meter and loading effects.
Branch current expression formula after failure before meter and loading effects specifically:
Branch current expression formula after failure after meter and loading effects specifically:
Branch current varying type before and after meter and loading effects specifically:
Wherein,For branch current after the failure before meter and loading effects, zpqFor the impedance of branch pq, G is distribution network
The set of middle active node, ZpjFor the mutual impedance between node p and active node j, ZqjBetween node q and active node j
Mutual impedance,For the Injection Current of active node j, ZpfFor the mutual impedance between node p and malfunctioning node f, ZqfFor node q and
Mutual impedance between malfunctioning node f, m(n)For proportionality coefficient, ZfjFor the mutual impedance between malfunctioning node f and active node j,
Zff(1)For the positive sequence self-impedance of malfunctioning node f,To add reactance,For branch electricity after the failure after meter and loading effects
Stream, L are the set of each compensating current element, ZpiFor the mutual impedance between node p and load bus i, ZqiFor node q and load section
Mutual impedance between point i, ZfiFor the mutual impedance between malfunctioning node f and load bus i,Before and after meter and loading effects
Branch current variable quantity.
In above-mentioned formula (3), noteFor the voltage influence amount D of load1；In above-mentioned formula (6),
NoteFor the electric current influence amount D of load2.At this point, with node voltage variable quantity and branch electricity
Flowing the relevant variable of variable quantity includes load i equivalent compensation electric current Ii, load voltage influence amount D1With the electric current influence amount of load
D2。
On the basis of the above embodiments, the load provided in an embodiment of the present invention suitable for relay protection setting calculation screens
The step S102 of method is specifically included:
The load value of each load is substituted into the node voltage varying type before and after meter and loading effects, obtains the voltage of each load
Influence value；
The load value of each load is substituted into the branch current varying type before and after meter and loading effects, obtains the electric current of each load
Influence value.
The equivalent compensation electric current of each load is substituted into voltage influence amount D1Expression formula and electric current influence amount D2Expression formula
In, obtain the voltage influence amount D of load1With electric current influence amount D2。
To sum up, whether excessive on the influence of the result of adaptive setting for load i, there are three the factors of consideration, i.e., equivalent benefit
Repay electric current IiGreater than load reference value Ii0, voltage influence amount D1Greater than voltage change specified value D10, electric current influence amount D2Greater than electricity
Rheology specified value D20.According to specific requirements, can be set meet one of them, two or three conditions when think i pairs of load
The result influence of adaptive setting is excessive, need to consider in adaptive setting.
Fig. 4 is a kind of schematic diagram of 39 node system of IEEE provided in an embodiment of the present invention.
To further illustrate the load screening technique provided by the above embodiment suitable for relay protection setting calculation, the present invention
39 node system of IEEE of embodiment as shown in connection with fig. 4 is illustrated.
Receive the load reference value I that staff is arranged according to computational accuracy demandi0=5, voltage change specified value D10=
0.00485, curent change specified value D20=0.00279.
As shown in figure 4, there are 15 nodes to be connected to load in 39 node system of IEEE, occurs three at bus nodes 16 and connect
After ground short circuit failure, using the short circuit current of the voltage of node 19 and branch 19-16 as analysis object, each node load is big
It is small, voltage and current impact factor is as shown in table 1, be per unit value.
Each node load size of table 1, voltage and current impact factor
Equivalent compensation electric current I is worked as in settingiGreater than load reference value Ii0, voltage influence amount D1Greater than voltage change specified value
D10, electric current influence amount D2Greater than curent change specified value D20Three conditions need to consider the influence of load i when being all satisfied, from table 1
It can be seen that in given accuracy rating, it is only necessary to consider the influence of load 20 and load 29, the load quantity that need to be considered is from 15
It is a to be reduced to 2.
Further verifying only considers the correctness of calculated result when load 20 and load 29.As shown in table 2, considering complete bear
Lotus considers emphasis load, do not consider under three kinds of scenes of load (zero load), and the voltage of calculate node 19 and branch 19-16's is short
Road electric current, and using the short circuit current of the voltage of the node 19 under full load scene and branch 19-16 as a reference value to calculating
As a result it is compared analysis, data are per unit value in table.
Node voltage and branch, short-circuit electric current under 2 three kinds of load scenarios of table
As can be seen from Table 2, only consider the error of the voltage and current under 2 emphasis loads within 10%, and it is empty
Voltage and current error under carrying is close to 30%.
It is above calculate and analysis the result shows that, with the load provided by the above embodiment suitable for relay protection setting calculation
Screening technique greatly reduces calculation amount while guaranteeing calculated result accuracy.
The corresponding each embodiment of load screening technique suitable for relay protection setting calculation as detailed above, it is basic herein
On, the invention also discloses the load screening plants suitable for relay protection setting calculation corresponding with the above method.
Fig. 5 is that a kind of structure of the load screening plant suitable for relay protection setting calculation provided in an embodiment of the present invention is shown
It is intended to.
As shown in figure 5, the load screening plant provided in an embodiment of the present invention suitable for relay protection setting calculation includes:
Acquiring unit 501 influences a reference value for obtaining voltage influence a reference value and electric current；
Computing unit 502, for calculating voltage influence value of each load to distribution network and the electric current shadow to distribution network
Ring value；
Screening unit 503 meets the voltage influence value greater than voltage influence a reference value for filtering out in each load
It is greater than the load of at least one condition in electric current influence a reference value with electric current influence value, obtained load will be screened and be included in relay
During protection seting calculates.
Further, acquiring unit 501 specifically includes:
Receiving unit, load a reference value, voltage change specified value and curent change specified value for receiving input；
First computation subunit, based on substituting into load a reference value and voltage change specified value and before and after loading effects
In node voltage varying type, voltage influence a reference value is obtained；
Second computation subunit, based on substituting into load a reference value and curent change specified value and before and after loading effects
In branch current varying type, obtaining electric current influences a reference value.
Further, computing unit 502 specifically includes:
Third computation subunit, the node voltage based on substituting into the load value of each load and before and after loading effects change
Formula obtains the voltage influence value of each load；
4th computation subunit, the branch current based on substituting into the load value of each load and before and after loading effects change
Formula obtains the electric current influence value of each load.
Since the embodiment of device part is corresponded to each other with the embodiment of method part, the embodiment of device part is asked
Referring to the description of the embodiment of method part, wouldn't repeat here.
Fig. 6 is that a kind of structure of the load screening installation suitable for relay protection setting calculation provided in an embodiment of the present invention is shown
It is intended to.
As shown in fig. 6, the adaptive setting equipment of relay protection provided in an embodiment of the present invention includes:
Memory 601, for storing instruction, described instruction include the negative of relay protection described in above-mentioned any one embodiment
The step of lotus screening technique；
Processor 602, for executing described instruction.
Load screening installation provided in this embodiment suitable for relay protection setting calculation, since processor tune can be passed through
The computer program stored with memory realizes the load suitable for relay protection setting calculation provided such as above-mentioned any embodiment
The step of screening technique, so this equipment is with similarly real with the above-mentioned load screening technique suitable for relay protection setting calculation
Border effect.
This programme in order to better understand, the embodiment of the present invention also provide a kind of readable storage medium storing program for executing, the readable storage medium
It is stored with computer program in matter, realizes that any embodiment as above mentioned is suitable for relay when computer program is executed by processor
The step of load screening technique that protection seting calculates.
Readable storage medium storing program for executing provided in this embodiment, since the meter of readable storage medium storing program for executing storage can be called by processor
The step of calculation machine program, the load screening technique suitable for relay protection setting calculation that realization such as above-mentioned any embodiment provides,
So this readable storage medium storing program for executing has with the above-mentioned same actual effect of load screening technique suitable for relay protection setting calculation.
In several embodiments provided herein, it should be understood that disclosed method, apparatus, equipment and readable
Storage medium may be implemented in other ways.For example, the apparatus embodiments described above are merely exemplary, example
Such as, the division of module, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple
Module or component can be combined or can be integrated into another system, or some features can be ignored or not executed.It is another
Point, shown or discussed mutual coupling, direct-coupling or communication connection can be through some interfaces, device or
The indirect coupling or communication connection of module can be electrical property, mechanical or other forms.Module can as illustrated by the separation member
It is physically separated with being or may not be, the component shown as module may or may not be physics mould
Block, it can it is in one place, or may be distributed on multiple network modules.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.
It, can also be in addition, can integrate in a processing module in each functional module in each embodiment of the application
It is that modules physically exist alone, can also be integrated in two or more modules in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.
If integrated module is realized and when sold or used as an independent product in the form of software function module, can
To be stored in a computer readable storage medium.Based on this understanding, the technical solution of the application substantially or
Say that all or part of the part that contributes to existing technology or the technical solution can embody in the form of software products
Out, which is stored in a storage medium, including some instructions are used so that a computer equipment
The whole of (can be personal computer, funcall device or the network equipment etc.) execution each embodiment method of the application
Or part steps.And readable storage medium storing program for executing above-mentioned may include: USB flash disk, mobile hard disk, read-only memory (Read-Only
Memory, ROM), random access memory (Random Access Memory, RAM), magnetic or disk etc. is various to deposit
Store up the medium of program code.
Above to provided by the present invention a kind of suitable for the load screening technique of relay protection setting calculation, device, equipment
And readable storage medium storing program for executing is described in detail.Each embodiment is described in a progressive manner in specification, each embodiment
What is stressed is the difference from other embodiments, and the same or similar parts in each embodiment may refer to each other.
For the device disclosed in the embodiment, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, phase
Place is closed referring to method part illustration.It should be pointed out that for those skilled in the art, not departing from
, can be with several improvements and modifications are made to the present invention under the premise of the principle of the invention, these improvement and modification also fall into this hair
In bright scope of protection of the claims.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Claims (10)
1. a kind of load screening technique suitable for relay protection setting calculation characterized by comprising
Obtaining voltage influence a reference value and electric current influences a reference value；
Calculate voltage influence value of each load to distribution network and the electric current influence value to the distribution network；
It is filtered out in each load and meets the voltage influence value greater than the voltage influence a reference value and the electric current shadow
The load that value is greater than at least one condition in electric current influence a reference value is rung, obtained load will be screened and be included in relay protection
In adaptive setting.
2. load screening technique according to claim 1, which is characterized in that the acquisition voltage influence a reference value and electric current
A reference value is influenced, is specifically included:
Receive load a reference value, voltage change specified value and the curent change specified value of input；
The load a reference value and the voltage change specified value are substituted into the node voltage varying type before and after meter and loading effects
In, obtain the voltage influence a reference value；
The load a reference value and the curent change specified value are substituted into the branch current varying type before and after meter and loading effects
In, obtaining the electric current influences a reference value.
3. load screening technique according to claim 2, which is characterized in that the node electricity before and after the meter and loading effects
Pressure varying type is obtained especially by following manner:
Each load is equivalent to compensating current element using penalty method；
The node impedance square of each compensating current element and the superimposed stacking network of first wife's electric network is established using principle of stacking
Battle array；
Failure posterior nodal point voltage expression and meter and load shadow based on nodal impedance matrix foundation and before loading effects
Failure posterior nodal point voltage expression after sound；
After the failure after the failure posterior nodal point voltage expression and the meter and loading effects before the meter and loading effects
Node voltage expression formula obtains the node voltage varying type before and after the meter and loading effects.
4. load screening technique according to claim 3, which is characterized in that the failure deutomerite before the meter and loading effects
Point voltage expression specifically:
Failure posterior nodal point voltage expression after the meter and loading effects specifically:
Node voltage varying type before and after the meter and loading effects specifically:
Wherein,For the failure posterior nodal point voltage before meter and loading effects, G is the set of active node in the distribution network,
ZpjFor the mutual impedance between node p and active node j,For the Injection Current of active node j, m(n)For proportionality coefficient, ZpfFor
Mutual impedance between the node p and malfunctioning node f, ZfjFor the mutual resistance between the malfunctioning node f and the active node j
It is anti-, Zff(1)For the positive sequence self-impedance of the malfunctioning node f,To add reactance,After the failure after meter and loading effects
Node voltage, L are the set of each compensating current element, ZpiFor the mutual impedance between the node p and load bus i, ZfiFor
Mutual impedance between the malfunctioning node f and the load bus i,For the node voltage variation before and after meter and loading effects
Amount.
5. load screening technique according to claim 3, which is characterized in that the branch electricity before and after the meter and loading effects
Stream varying type is obtained especially by following manner:
Branch current expression formula and meter and load shadow after failure based on nodal impedance matrix foundation and before loading effects
Branch current expression formula after failure after sound；
After branch current expression formula after the failure before the meter and loading effects and the failure after the meter and loading effects
Branch current expression formula obtains the branch current varying type before and after the meter and loading effects.
6. load screening technique according to claim 5, which is characterized in that propped up after the failure before the meter and loading effects
Road current expression specifically:
Branch current expression formula after failure after the meter and loading effects specifically:
Branch current varying type before and after the meter and loading effects specifically:
Wherein,For branch current after the failure before meter and loading effects, zpqFor the impedance of branch pq, G is the stacking network
The set of middle active node, ZpjFor the mutual impedance between node p and active node j, ZqjFor the node q and active node j it
Between mutual impedance,For the Injection Current of the active node j, ZpfFor the mutual impedance between the node p and malfunctioning node f,
ZqfFor the mutual impedance between the node q and the malfunctioning node f, m(n)For proportionality coefficient, ZfjFor the malfunctioning node f and institute
State the mutual impedance between active node j, Zff(1)For the positive sequence self-impedance of the malfunctioning node f,To add reactance,For
Branch current after failure after meter and loading effects, L are the set of each compensating current element, ZpiFor the node p and load
Mutual impedance between node i, ZqiFor the mutual impedance between the node q and the load bus i, ZfiFor the malfunctioning node f
Mutual impedance between the load bus i,For the branch current variable quantity before and after meter and loading effects.
7. load screening technique according to claim 2, which is characterized in that described to calculate each load to the electricity of distribution network
Influence value and the electric current influence value to the distribution network are pressed, is specifically included:
The load value of each load is substituted into the node voltage varying type before and after the meter and loading effects, is obtained each described negative
The voltage influence value of lotus；
The load value of each load is substituted into the branch current varying type before and after the meter and loading effects, is obtained each described negative
The electric current influence value of lotus.
8. a kind of load screening plant suitable for relay protection setting calculation characterized by comprising
Acquiring unit influences a reference value for obtaining voltage influence a reference value and electric current；
Computing unit, for calculating each load to the voltage influence value of distribution network and being influenced on the electric current of the distribution network
Value；
Screening unit meets the voltage influence value greater than the voltage influence a reference value for filtering out in each load
It is greater than the load of at least one condition in electric current influence a reference value with the electric current influence value, obtained load will be screened
It is included in relay protection setting calculation.
9. a kind of load screening installation suitable for relay protection setting calculation characterized by comprising
Memory, for storing instruction, described instruction include being suitable for relay protection setting described in claim 1 to 7 any one
The step of load screening technique of calculating；
Processor, for executing described instruction.
10. a kind of readable storage medium storing program for executing, is stored thereon with computer program, which is characterized in that the computer program is processed
The step as described in claim 1 to 7 any one suitable for the load screening technique of relay protection setting calculation is realized when device executes
Suddenly.
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