CN107134764A - A kind of T-type structure mining high-voltage electric-network automatic short-circuit computational methods - Google Patents
A kind of T-type structure mining high-voltage electric-network automatic short-circuit computational methods Download PDFInfo
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- CN107134764A CN107134764A CN201710342393.8A CN201710342393A CN107134764A CN 107134764 A CN107134764 A CN 107134764A CN 201710342393 A CN201710342393 A CN 201710342393A CN 107134764 A CN107134764 A CN 107134764A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
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Abstract
The present invention discloses T-type structure mining high-voltage electric-network automatic short-circuit computational methods, belong to coalmine high-voltage power network short circuit calculation technical field, the incidence matrix of the annexation generation main line node and main line node that are first depending in mine high voltage supply system figure between electrical equipment, the incidence matrix of inlet wire node and main line node；Furthermore calculate main line node and branch node and finally power and incidence matrix and complete matrix operation；Secondly connectedness according to unidirectional figure, calculates power incidence matrix and branch node and main line node of branch node and branch node and finally powers and incidence matrix and complete matrix operation；Finally when short trouble occurs for the circuit that branch node is directly controlled, complete the automatic short-circuit of mine high voltage supply system and calculate.The present invention, when occurring short trouble, limits the power supply series of colliery high voltage supply system using the high voltage supply system of T-type structure, it is to avoid mining high-voltage electric-network trips due to bypassing the immediate leadership and causes large area blackout.
Description
Technical field
The invention belongs to coalmine high-voltage power network short circuit calculation technical field, more particularly to a kind of T-type structure mine high-tension electricity
Net automatic short-circuit computational methods.
Background technology
There are multiple power supplys in more than 35KV power network, belong to complicated enclosed power network, short circuit calculation is complex, and ore deposit
Well high voltage supply system is 6KV or 10KV grades, and two power supplys should use fanout operation mode, or all the way using standby all the way
With belonging to single supply open type power network, its short circuit calculation can use fairly simple absolute-value scheme or relative value method.Ordinary circumstance
Under, in mining high-voltage electric-network, adjacent outlet switch is drawn from the bus after service entrance switch, but uses this wiring side
Formula can cause underground coal mine series of powering more, trip phenomenon of bypassing the immediate leadership is easily caused when occurring short trouble, in order to drop
The power supply series of low colliery high voltage supply system, employs the high voltage supply system of T-type structure in some collieries, so as to
Effectively limit the power supply series of colliery high voltage supply system.Existing mining high-voltage electric-network automatic short-circuit computational methods both for
Electric power system generally completes automatic short-circuit and calculated, for the automatic short-circuit calculating side of T-type structure mining high-voltage electric-network
Method has not been reported.
A kind of T-type structure mining high-voltage electric-network automatic short-circuit computational methods proposed by the present invention, can be according to T-type structure ore deposit
The electric power system feature of well high-voltage fence, constructs the network topology model of T-type structure mine high voltage supply system, can be very convenient
Ground completes the topology Identification of T-type structure mine high voltage supply system supply network, and realizes that automatic short-circuit is calculated based on this
Function, with method is simple, efficiency high the features such as.
The content of the invention
The purpose of the present invention is to provide a kind of T-type structure mining high-voltage electric-network automatic short-circuit computational methods, with solution
The power supply series for stating the colliery high voltage supply system proposed in background technology is more, and the tripping operation that occurs to cause to bypass the immediate leadership during short trouble is asked
Topic.
For mine high voltage supply system, the supply line directly controlled according to every branch node set up branch node-
Supply line adjacency list T；By the adjacency list, its power supply directly controlled can be inquired according to corresponding branch node numbering
Essential parameter of circuit, including supply line's length, supply line's model, unit resistance and unit reactance information；It is dry according to every
The supply line that circuit node is directly controlled sets up main line node-supply line adjacency list TT；, can be according to phase by the adjacency list
The main line node serial number answered inquires supply line's basic parameter that it is directly controlled, including supply line's length, supply line
Model, unit resistance and the automatically controlled information of unit；And set system reactance under mine high voltage supply system maximum operational mode and
System reactance under minimum operational mode；The power branch node of mine high voltage supply system is set, and power branch node refers to
The branch node directly powered by higher level's power supply department.
For mine high voltage supply system, switched using the bus that service entrance switch is connected as inlet wire node, with high-voltage terminal
The branch road of connection is as branch node, and the main line using the connection of main line high-voltage switch gear is as main line node, if inlet wire node has m
Individual, branch node has n, and main line node has k,
Step 11：According to the annexation generation main line node between electrical equipment in mine high voltage supply system figure with doing
The incidence matrix B of the incidence matrix A of circuit node, main line node and branch node, the incidence matrix of inlet wire node and main line node
D, the incidence matrix E of branch node and inlet wire node；
Step 12：Main line node and branch node are calculated according to incidence matrix A and incidence matrix B finally to power incidence matrix
U, incidence matrix U are arranged for k rows n, and certain main line node can be described in incidence matrix U and is powered by which branch node；Together
When, complete matrix operation；
Step 13：According to the connectedness of unidirectional figure, calculate branch node and branch node and power incidence matrix NH and branch road
Node and main line node are finally powered incidence matrix G；Meanwhile, complete matrix operation；
Step 14：When short trouble occurs for the circuit that branch node is directly controlled, according to branch node and branch node
Power supply incidence matrix NH and branch node and main line node incidence matrix G completion mine high voltage supply systems of finally powering are automatically short
Road is calculated.
Wherein it is preferred to, in a step 11, incidence matrix A arranges for k rows k, and incidence matrix A is with main line node sequence number
Line number, is row number with main line node sequence number；Incidence matrix B arranges for k rows n, and incidence matrix B is row with main line node sequence number
Number, using branch node serial number as row number；Incidence matrix D arranges for m rows k, and incidence matrix D is line number with inlet wire node sequence number,
It is row number with main line node sequence number；Incidence matrix E arranges for n rows m, and incidence matrix E is using branch node serial number as line number, to enter
Line node sequence number is row number, is comprised the following steps that：
Step 21：During incidence matrix A is generated, the element A that the i-th row jth is arranged in incidence matrix AijRepresent,
In the case of i ≠ j, directly powered if the corresponding main line node of the i-th row arranges corresponding main line node by jth, and the i-th row correspondence
Main line node on high-voltage switch gear state to close a floodgate, jth arranges on corresponding main line node high-voltage switch gear state to close a floodgate, then Aij=
1, otherwise Aij=0；In the case of i=j, if high-voltage switch gear state is closes a floodgate on the corresponding main line node of the i-th row, Aij
=1, otherwise Aij=0；
Step 22：During incidence matrix B is generated, the element B that the i-th row jth is arranged in incidence matrix BijRepresent, such as
Really the corresponding main line node of the i-th row arranges corresponding branch node by jth and directly powered, and high on the corresponding main line node of the i-th row
It is combined floodgate to press off off status, and it is combined floodgate that jth, which arranges high-voltage switch gear state on corresponding branch node, then Bij=1, otherwise Bij=0；
Step 23：During incidence matrix D is generated, the element D that the i-th row jth is arranged in incidence matrix DijRepresent, such as
Really the corresponding inlet wire node of the i-th row arranges corresponding main line node by jth and directly powered, and high on the corresponding branch node of the i-th row
It is combined floodgate to press off off status, and it is combined floodgate that jth, which arranges high-voltage switch gear state on corresponding main line node, then Dij=1, otherwise Dij=0；
Step 24：During incidence matrix E is generated, the element E that the i-th row jth is arranged in incidence matrix EijRepresent, such as
Really the corresponding branch node of the i-th row arranges corresponding inlet wire node by jth and directly powered, and high on the corresponding branch node of the i-th row
It is combined floodgate to press off off status, and it is combined floodgate that jth, which arranges high-voltage switch gear state on corresponding main line node, then Eij=1, otherwise Eij=0.
Wherein it is preferred to, in step 12 complete matrix operation when, by matrix element and matrix element multiplying
Binary system and computing are defined as, the add operation of matrix element and matrix element is defined as binary system or computing, it is specific to calculate
Step is as follows：
Step 31：According to the opening and closing state of high-voltage switch gear on branch node, high-voltage switch gear opens on generation branch node
Off status vector S, switch state vector S includes n element；In switch state vector S, on off state closes a floodgate, corresponding element
It is worth for 1, conversely, being then 0；
Step 32：According to the opening and closing state of high-voltage switch gear on the node of main line, high-voltage switch gear opens on generation main line node
Off status vector Q, switch state vector Q include k element, in switch state vector Q, and on off state closes a floodgate, corresponding element
It is worth for 1；Conversely, being then 0；
Step 33：According to the connectedness of unidirectional figure, incidence matrix A and incidence matrix B are done into multiplying, obtain original
1st grade of main line node and branch node are powered incidence matrix L, L=A*B；
Step 34：According to incidence matrix A and incidence matrix L, incidence matrix C, C=A*L are obtained；
Step 35：Differed in incidence matrix C and incidence matrix L, then assign L by incidence matrix C numerical value, repeat
Step 34, if incidence matrix C is identical with incidence matrix L, step 36 is performed；
Step 36：N element often capable in each element and incidence matrix C in switch state vector S is carried out and fortune
Incidence matrix V is obtained after calculation, by each element and incidence matrix V in switch state vector Q each column k element carry out with
Incidence matrix U is obtained after computing.
Wherein it is preferred to, matrix element is defined as by the matrix operation in the step 13 with matrix element multiplying
Binary system and computing, are defined as binary system or computing, specific calculation procedure is such as by the add operation of matrix element and matrix element
Under：
Step 41：According to the opening and closing state of high-voltage switch gear on inlet wire node, high-voltage switch gear opens on generation inlet wire node
Off status vector W, switch state vector W include m element, in switch state vector W, and on off state closes a floodgate, corresponding element
It is worth for 1；Conversely, being then 0；
Step 42：M element of each column in each element and incidence matrix D in switch state vector W is carried out and fortune
Incidence matrix ND is obtained after calculation, m element often capable in each computing in switch state vector W and incidence matrix E is carried out
With obtaining incidence matrix NE after computing；
Step 43：Incidence matrix F, F=NE*ND are obtained according to incidence matrix NE and incidence matrix ND；FijRepresent association square
The element that the i-th row jth is arranged in battle array F；If Fij=1, represent that branch node i is powered by main line node j, if Fij=0, represent
Branch node i is not powered by main line node j；
Step 44：Branch node and main line node are calculated according to incidence matrix F and incidence matrix A finally to power incidence matrix
G, G=F*A；
Step 45：If incidence matrix G and incidence matrix F are differed, F is assigned by incidence matrix G numerical value, repetition is held
Row step 44, if incidence matrix G is identical with incidence matrix F, continues executing with step 46；
Step 46：Powered incidence matrix according to incidence matrix G and incidence matrix U calculating matrix branch node and branch node
H, H=G*U；HijThe element that the i-th row jth is arranged in representing matrix H；
Step 47：Electric power system between branch node i and branch node i fails correctly to be reflected, it is therefore desirable to right
Incidence matrix H is modified, and obtains revised incidence matrix NH, NHijRepresent the element that the i-th row jth is arranged in incidence matrix NH；
If i ≠ j, NHij=HijIf high-voltage switch gear state is combined floodgate on i=j, and branch node i, then NHij=1, otherwise NHij
=0.
Wherein it is preferred to, foundation branch node in the step 14 and branch node are powered incidence matrix NH and branch road
Node and main line node the incidence matrix G that finally powers complete the automatic short-circuit of mine high voltage supply system and calculated, and comprise the following steps that：
Step 51：When short circuit occurs for the corresponding line ends of the circuit i that high-voltage switch gear is directly controlled on certain branch node,
Because circuit i is controlled by branch node i, branch node i corresponding rows in branch node and branch node power incidence matrix NH
Number it is i, therefore is first depending on branch node i and finds corresponding row in branch node and branch node power incidence matrix NH,
Then the corresponding row number of all elements that numerical value in the i-th row is 1 is found, then corresponding branch node is found according to the row number obtained
Set P, set P are all branch node set powered to circuit i, if power branch node is not present in set P, are said
Open-wire line road i does not have power supply to power, without short circuit calculation；If there is power branch node in set P, illustrate that circuit i has
Power supply is powered, then performs step 52；
Step 52：Branch node i corresponding line numbers in branch node finally powers incidence matrix G with main line node are i,
Therefore be first depending on branch node i finds corresponding row in branch node finally powers incidence matrix G with main line node, then
The corresponding row number of all elements that numerical value in the i-th row is 1 is found, then corresponding main line node set is found according to the row number obtained
TP, set TP are all main line node sets powered to circuit i；
Step 53：Numbering for each branch node and main line node in set P and set TP inquires about branch road section respectively
Point-supply line adjacency list T and main line node-supply line adjacency list TT, obtains all branch nodes in set P and set TP
Supply line corresponding with main line node information, according to every supply line's length, unit resistance and the unit reactance meter obtained
Resistance and the reactance of every circuit are calculated, step 54 and step 55 is performed；
Step 54：Calculated and obtained according to the system reactance under the resistance of every circuit, reactance and the maximum operational mode pre-set
Obtain the system all-in resistance R under maximum operational modemaxWith total reactance Xmax, then according to the flat of circuit where high voltage supply system short dot
Equal voltage UsThe three short circuit current under maximum operational mode is calculated with all-in resistance, total reactance
Step 55：Calculated according to the system reactance under the resistance of every circuit, reactance and the minimum operational mode pre-set
Obtain the system all-in resistance R under minimum operational modeminWith total reactance Xmin, then according to circuit where high voltage supply system short dot
Average circuit UsThe two-phase short circuit current flow under minimum operational mode is calculated with all-in resistance, total reactance
Compared with prior art, the beneficial effects of the invention are as follows：
Using the high voltage supply system of T-type structure, when occurring short trouble, trip phenomenon of bypassing the immediate leadership is easily caused, so as to
The power supply series of colliery high voltage supply system can effectively be limited, it is to avoid mining high-voltage electric-network trips due to bypassing the immediate leadership and causes big face
The generation of product power outage.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is mine high voltage supply system figure of the invention.
In figure：Filling part represents that high-voltage switch gear is gate-dividing state in Fig. 1, is not filled by part and represents that high-voltage switch gear is combined floodgate
State, power branch node is (1), (2), (3), (4), (5) and (6).
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, the present embodiment provides a kind of T-type structure mining high-voltage electric-network automatic short-circuit computational methods, for attached
Fig. 1 mine high voltage supply system, generates incidence matrix A, incidence matrix B, incidence matrix D and incidence matrix E；Specific steps are such as
Under：
Step 21：During incidence matrix A is generated, the element A that the i-th row jth is arranged in incidence matrix AijRepresent,
In the case of i ≠ j, directly powered if the corresponding main line node of the i-th row arranges corresponding main line node by jth, and the i-th row correspondence
Main line node on high-voltage switch gear state to close a floodgate, jth arranges on corresponding main line node high-voltage switch gear state to close a floodgate, then Aij=
1, otherwise Aij=0, in the case of i=j, if high-voltage switch gear state is closes a floodgate on the corresponding main line node of the i-th row, Aij
=1, otherwise Aij=0；It can thus be concluded that：
Step 22：During incidence matrix B is generated, the element B that the i-th row jth is arranged in incidence matrix BijRepresent, such as
Really the corresponding main line node of the i-th row arranges corresponding branch node by jth and directly powered, and high on the corresponding main line node of the i-th row
It is combined floodgate to press off off status, and it is combined floodgate that jth, which arranges high-voltage switch gear state on corresponding branch node, then Bij=1, otherwise Bij=0,
It can thus be concluded that：
Step 23：During incidence matrix D is generated, the element D that the i-th row jth is arranged in incidence matrix DijRepresent, such as
Really the corresponding inlet wire node of the i-th row arranges corresponding main line node by jth and directly powered, and high on the corresponding inlet wire node of the i-th row
It is combined floodgate to press off off status, and it is combined floodgate that jth, which arranges high-voltage switch gear state on corresponding main line node, then Dij=1；Otherwise Dij=0；
It can thus be concluded that：
Step 24：During incidence matrix E is generated, the element E that the i-th row jth is arranged in incidence matrix EijRepresent, such as
Really the corresponding branch node of the i-th row arranges corresponding inlet wire node by jth and directly powered, and high on the corresponding branch node of the i-th row
It is combined floodgate to press off off status, and it is combined floodgate that jth, which arranges high-voltage switch gear state on corresponding inlet wire node, then Eij=1；Otherwise Eij=0；
It can thus be concluded that：
For the mine high voltage supply system of accompanying drawing 1, main line node and branch are calculated according to incidence matrix A and incidence matrix B
Circuit node is finally powered incidence matrix U, and specific calculation procedure is as follows：
Step 31：According to the opening and closing state of high-voltage switch gear on branch node, high-voltage switch gear opens on generation branch node
Off status vector S, switch state vector S includes n element, in switch state vector S, and on off state closes a floodgate, corresponding element
It is worth for 1；Anyway, then it is 0；
S=[1 11111111111111111111 1]；
Step 32：According to the opening and closing state of high-voltage switch gear on the node of main line, high-voltage switch gear opens on generation main line node
Off status vector Q, switch state vector Q include k element；In switch state vector Q, on off state closes a floodgate, corresponding element
It is worth for 1；Conversely, being then 0；
Q=| 111111 |；
Step 33：According to the connectedness of unidirectional figure, incidence matrix A and incidence matrix B are done into multiplying, obtain original
1st grade of main line node and branch node are powered incidence matrix L, L=A*B；
Step 34：Incidence matrix C, C=A*L are obtained according to incidence matrix A and incidence matrix L；
Step 35：If incidence matrix C and incidence matrix L are differed, incidence matrix is assigned by incidence matrix C numerical value
L, repeats step 34；If incidence matrix C is identical with incidence matrix L, step 36 is performed；
Step 36：After n element progress often capable in each element and Matrix C in switch state vector S and computing
Matrix V is obtained, K element of each column in each element and matrix V in switch state vector Q is carried out with obtaining square after computing
Battle array U；
For the mine high voltage supply system of accompanying drawing 1, according to the connectedness of unidirectional figure, branch node and branch node are calculated
Power supply incidence matrix NH and branch node and main line node are finally powered incidence matrix G, and specific calculation procedure is as follows：
Step 41：According to the opening and closing state of high-voltage switch gear on inlet wire node, high-voltage switch gear opens on generation inlet wire node
Off status vector W, W=[1 1111 1]；Switch state vector W includes m element, in switch state vector W, switch
State is closed a floodgate, and corresponding element value is 1；Conversely, being then 0；
Step 42：M element of each column is carried out and fortune in each element and incidence matrix D in switch state vector W
Incidence matrix ND is obtained after calculation, m element often capable in each element and incidence matrix E in switch state vector W is carried out
With obtaining incidence matrix NE after computing；
Step 43：Incidence matrix F, F=NE*ND are obtained according to incidence matrix NE and incidence matrix ND；FijRepresent association square
The element that the i-th row jth is arranged in battle array F；If Fij=1, represent that branch node i is powered by main line node j；If Fij=0, represent
Branch node i is not powered by main line node j；
Step 44：Branch node and main line node are calculated according to incidence matrix F and incidence matrix A finally to power incidence matrix
G, G=F*A；
Step 45：If incidence matrix G and incidence matrix F are differed, F is assigned by incidence matrix G numerical value, repetition is held
Row step 44, if incidence matrix G is identical with incidence matrix F, continues executing with step 46；
Step 46：Powered incidence matrix according to incidence matrix G and incidence matrix U calculating matrix branch node and branch node
H, H=G*U；
Step 47：Revised incidence matrix NH is calculated,
For the mine high voltage supply system of accompanying drawing 1, when short trouble occurs for the circuit that branch node is directly controlled, according to
Ore deposit is completed according to branch node and branch node incidence matrix NH and branch node and main line node the incidence matrix G that finally powers that powers
The automatic short-circuit of well high voltage supply system is calculated, and is comprised the following steps that：
Step 51：When short circuit occurs for the corresponding line ends of the circuit i that high-voltage switch gear is directly controlled on certain branch node,
Because circuit i is controlled by branch node i, branch node i corresponding rows in branch node and branch node power incidence matrix NH
Number it is i, therefore is first depending on branch node i and finds corresponding row in branch node and branch node power incidence matrix NH,
Then the corresponding row number of all elements that numerical value in the i-th row is 1 is found, then corresponding branch node is found according to the row number obtained
Set P, set P are all branch node set powered to circuit i, if power branch node is not present in set P, are said
Open-wire line road i does not have power supply to power, without short circuit calculation；If there is power branch node in set P, illustrate that circuit i has
Power supply is powered, then performs step 52；
Step 52：Branch node i corresponding line numbers in branch node finally powers incidence matrix G with main line node are i,
Therefore be first depending on branch node i finds corresponding row in branch node finally powers incidence matrix G with main line node, then
The corresponding row number of all elements that numerical value in the i-th row is 1 is found, then corresponding main line node set is found according to the row number obtained
TP, set TP are all main line node sets powered to circuit i；
Step 53：Numbering for each branch node and main line node in set P and set TP inquires about branch road section respectively
Point-supply line adjacency list T and main line node-supply line adjacency list TT, obtains all branch nodes in set P and set TP
Supply line corresponding with main line node information；According to every supply line's length, unit resistance and the unit reactance meter obtained
Resistance and the reactance of every circuit are calculated, step 54 and step 55 is performed；
Step 54：Calculated and obtained according to the system reactance under the resistance of every circuit, reactance and the maximum operational mode pre-set
Obtain the system all-in resistance R under maximum operational modemaxWith total reactance Xmax, then according to the flat of circuit where high voltage supply system short dot
Equal voltage UsThe three short circuit current under maximum operational mode is calculated with all-in resistance, total reactance
Step 55：Calculated and obtained according to the system reactance under the resistance of every circuit, reactance and the minimum operational mode pre-set
Obtain the system all-in resistance R under minimum operational modeminWith total reactance Xmin, then according to the flat of circuit where high voltage supply system short dot
Equal voltage UsThe line to line fault electric current under minimum operational mode is calculated with all-in resistance, total reactance
The beneficial effect of the present embodiment is：
The present embodiment uses the high voltage supply system of T-type structure, when occurring short trouble, is easily caused tripping operation of bypassing the immediate leadership existing
As, so as to effectively limitation colliery high voltage supply system power supply series, it is to avoid mining high-voltage electric-network due to bypass the immediate leadership tripping operation and
Cause the generation of large area blackout.
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art,
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacing, within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc. should be included in this
Within the protection domain of invention.
Claims (5)
1. a kind of T-type structure mining high-voltage electric-network automatic short-circuit computational methods, it is characterised in that for mine high voltage supply system
System, switchs the branch road connected as inlet wire node, using high-voltage terminal as branch node, with dry using the bus that service entrance switch is connected
The main line of road high-voltage switch gear connection is as main line node, if inlet wire node has m, branch node has n, and main line node has k
It is individual,
Step 11：Saved according to the annexation generation main line node between electrical equipment in mine high voltage supply system figure with main line
The incidence matrix B of the incidence matrix A of point, main line node and branch node, the incidence matrix D of inlet wire node and main line node, branch
The incidence matrix E of circuit node and inlet wire node；
Step 12：Main line node and branch node are calculated according to incidence matrix A and incidence matrix B finally to power incidence matrix U, pass
Join matrix U to arrange for k rows n, certain main line node can be described in incidence matrix U and is powered by which branch node；Meanwhile, it is complete
Into matrix operation；
Step 13：According to the connectedness of unidirectional figure, calculate branch node and branch node and power incidence matrix NH and branch node
Finally powered incidence matrix G with main line node；Meanwhile, complete matrix operation；
Step 14：When short trouble occurs for the circuit that branch node is directly controlled, powered according to branch node with branch node
Incidence matrix NH and branch node and main line node the incidence matrix G that finally powers complete mine high voltage supply system automatic short-circuit meter
Calculate.
2. a kind of T-type structure mining high-voltage electric-network automatic short-circuit computational methods according to claim 1, it is characterised in that
In a step 11, incidence matrix A arranges for k rows k, and incidence matrix A is line number with main line node sequence number, with main line node sequence number
For row number；Incidence matrix B arranges for k rows n, and incidence matrix B is line number with main line node sequence number, using branch node serial number as row
Number；Incidence matrix D arranges for m rows k, and incidence matrix D is line number with inlet wire node sequence number, is row number with main line node sequence number；
Incidence matrix E arranges for n rows m, and incidence matrix E, using branch node serial number as line number, is row number with inlet wire node sequence number, specifically
Step is as follows：
Step 21：During incidence matrix A is generated, the element A that the i-th row jth is arranged in incidence matrix AijRepresent, in i ≠ j
In the case of, directly powered if the corresponding main line node of the i-th row arranges corresponding main line node by jth, and the i-th row is corresponding dry
High-voltage switch gear state is closes a floodgate on circuit node, and it is combined floodgate that jth, which arranges high-voltage switch gear state on corresponding main line node, then Aij=1, it is no
Then Aij=0；In the case of i=j, if high-voltage switch gear state is closes a floodgate on the corresponding main line node of the i-th row, Aij=1,
Otherwise Aij=0；
Step 22：During incidence matrix B is generated, the element B that the i-th row jth is arranged in incidence matrix BijRepresent, if the
The corresponding main line node of i rows arranges corresponding branch node by jth and directly powered, and height is pressed off on the corresponding main line node of the i-th row
Off status is closes a floodgate, and it is combined floodgate that jth, which arranges high-voltage switch gear state on corresponding branch node, then Bij=1, otherwise Bij=0；
Step 23：During incidence matrix D is generated, the element D that the i-th row jth is arranged in incidence matrix DijRepresent, if the
The corresponding inlet wire node of i rows arranges corresponding main line node by jth and directly powered, and height is pressed off on the corresponding branch node of the i-th row
Off status is closes a floodgate, and it is combined floodgate that jth, which arranges high-voltage switch gear state on corresponding main line node, then Dij=1, otherwise Dij=0；
Step 24：During incidence matrix E is generated, the element E that the i-th row jth is arranged in incidence matrix EijRepresent, if the
The corresponding branch node of i rows arranges corresponding inlet wire node by jth and directly powered, and height is pressed off on the corresponding branch node of the i-th row
Off status is closes a floodgate, and it is combined floodgate that jth, which arranges high-voltage switch gear state on corresponding main line node, then Eij=1, otherwise Eij=0.
3. a kind of T-type structure mining high-voltage electric-network automatic short-circuit computational methods according to claim 1, it is characterised in that
In step 12, when completing matrix operation, matrix element and matrix element multiplying are defined as binary system and computing, will
The add operation of matrix element and matrix element is defined as binary system or computing, and specific calculation procedure is as follows：
Step 31：According to the opening and closing state of high-voltage switch gear on branch node, the switch shape of high-voltage switch gear on branch node is generated
State vector S, switch state vector S include n element；In switch state vector S, on off state closes a floodgate, and corresponding element value is
1, conversely, being then 0；
Step 32：According to the opening and closing state of high-voltage switch gear on the node of main line, the switch shape of high-voltage switch gear on the node of main line is generated
State vector Q, switch state vector Q include k element, in switch state vector Q, and on off state closes a floodgate, and corresponding element value is
1；Conversely, being then 0；
Step 33：According to the connectedness of unidirectional figure, incidence matrix A and incidence matrix B are done into multiplying, original the 1st is obtained
Level main line node and branch node are powered incidence matrix L, L=A*B；
Step 34：According to incidence matrix A and incidence matrix L, incidence matrix C, C=A*L are obtained；
Step 35：Differed in incidence matrix C and incidence matrix L, then assign L by incidence matrix C numerical value, repeat step
34, if incidence matrix C is identical with incidence matrix L, perform step 36；
Step 36：After n element progress often capable in each element and incidence matrix C in switch state vector S and computing
Incidence matrix V is obtained, k element of each column in each element and incidence matrix V in switch state vector Q is carried out and computing
After obtain incidence matrix U.
4. a kind of T-type structure mining high-voltage electric-network automatic short-circuit computational methods according to claim 1, it is characterised in that
The matrix operation of the step 13, is defined as binary system and computing, by matrix element by matrix element and matrix element multiplying
The add operation of element and matrix element is defined as binary system or computing, and specific calculation procedure is as follows：
Step 41：According to the opening and closing state of high-voltage switch gear on inlet wire node, the switch shape of high-voltage switch gear on inlet wire node is generated
State vector W, switch state vector W include m element, in switch state vector W, and on off state closes a floodgate, and corresponding element value is
1；Conversely, being then 0；
Step 42：After the progress of m element and computing of each column in each element and incidence matrix D in switch state vector W
Incidence matrix ND is obtained, m element often capable in each computing in switch state vector W and incidence matrix E is carried out and fortune
Incidence matrix NE is obtained after calculation；
Step 43：Incidence matrix F, F=NE*ND are obtained according to incidence matrix NE and incidence matrix ND；FijRepresent in incidence matrix F
The element of i-th row jth row；If Fij=1, represent that branch node i is powered by main line node j, if Fij=0, represent branch road section
Point i is not powered by main line node j；
Step 44：Branch node and main line node are calculated according to incidence matrix F and incidence matrix A finally to power incidence matrix G, G
=F*A；
Step 45：If incidence matrix G and incidence matrix F are differed, F is assigned by incidence matrix G numerical value, step is repeated
Rapid 44, if incidence matrix G is identical with incidence matrix F, continue executing with step 46；
Step 46：Powered incidence matrix H, H according to incidence matrix G and incidence matrix U calculating matrix branch node and branch node
=G*U；HijThe element that the i-th row jth is arranged in representing matrix H；
Step 47：Electric power system between branch node i and branch node i fails correctly to be reflected, it is necessary to incidence matrix H
It is modified, obtains revised incidence matrix NH, NHijRepresent the element that the i-th row jth is arranged in incidence matrix NH；If i ≠ j,
Then NHij=HijIf high-voltage switch gear state is combined floodgate on i=j, and branch node i, then NHij=1, otherwise NHij=0.
5. a kind of T-type structure mining high-voltage electric-network automatic short-circuit computational methods according to claim 1, it is characterised in that
Foundation branch node in the step 14 and branch node power incidence matrix NH and branch node is finally supplied with main line node
Electric incidence matrix G completes the automatic short-circuit of mine high voltage supply system and calculated, and comprises the following steps that：
Step 51：When short circuit occurs for the corresponding line ends of the circuit i that high-voltage switch gear is directly controlled on certain branch node, because of line
Road i is controlled by branch node i, and branch node i corresponding line numbers in branch node and branch node power incidence matrix NH are
I, therefore be first depending on branch node i and find corresponding row in branch node and branch node power incidence matrix NH, then
The corresponding row number of all elements that numerical value in the i-th row is 1 is found, then corresponding branch node set is found according to the row number obtained
P, set P are all branch node set powered to circuit i, if power branch node is not present in set P, illustrate line
Road i does not have power supply to power, without short circuit calculation；If there is power branch node in set P, illustrate that circuit i has power supply
Power supply, then perform step 52；
Step 52：Branch node i corresponding line numbers in branch node finally powers incidence matrix G with main line node are i, therefore
It is first depending on branch node i and finds corresponding row in branch node finally powers incidence matrix G with main line node, then finds
Numerical value is the 1 corresponding row number of all elements in i-th row, then finds corresponding main line node set TP according to the row number obtained,
Set TP is all main line node sets powered to circuit i；
Step 53：Numbering for each branch node and main line node in set P and set TP inquires about branch node-confession respectively
Electric line adjacency list T and main line node-supply line adjacency list TT, obtains in set P and set TP all branch nodes and does
The corresponding supply line's information of circuit node, is calculated according to every supply line's length, unit resistance and the unit reactance obtained
The resistance of every circuit and reactance, perform step 54 and step 55；
Step 54：Calculated and obtained according to the system reactance under the resistance of every circuit, reactance and the maximum operational mode pre-set
System all-in resistance R under maximum operational modemaxWith total reactance Xmax, then according to the flat of circuit where high voltage supply system short dot
Equal voltage UsThe three short circuit current under maximum operational mode is calculated with all-in resistance, total reactance
Step 55：Calculated and obtained according to the system reactance under the resistance of every circuit, reactance and the minimum operational mode pre-set
System all-in resistance R under minimum operational modeminWith total reactance Xmin, then according to the flat of circuit where high voltage supply system short dot
Equal circuit UsThe two-phase short circuit current flow under minimum operational mode is calculated with all-in resistance, total reactance
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108520131A (en) * | 2018-03-30 | 2018-09-11 | 河南理工大学 | The Underground High-Voltage Power Network short circuit calculation method with incidence matrix is overlapped based on node |
| CN111347927A (en) * | 2020-03-04 | 2020-06-30 | 广东工业大学 | Reconfigurable battery pack switch control method for immune short circuit risk |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730394A (en) * | 2015-04-07 | 2015-06-24 | 河南理工大学 | Mine high-voltage power grid overcurrent protection setting inspection method based on sparse matrixes |
| CN104795800A (en) * | 2015-04-28 | 2015-07-22 | 河南理工大学 | Self-adaptive short-circuit calculation method for mine high-voltage distribution network based on tie switch states |
| CN105576622A (en) * | 2016-01-22 | 2016-05-11 | 河南理工大学 | Self-adaptive setting calculation method for single-bus mine high-voltage power grid running in multi-segment way |
| CN106370960A (en) * | 2016-08-15 | 2017-02-01 | 西安科技大学 | Mine's power grid electric leakage identification method based on the real component of the fault instantaneous positive sequence current |
-
2017
- 2017-05-16 CN CN201710342393.8A patent/CN107134764B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730394A (en) * | 2015-04-07 | 2015-06-24 | 河南理工大学 | Mine high-voltage power grid overcurrent protection setting inspection method based on sparse matrixes |
| CN104795800A (en) * | 2015-04-28 | 2015-07-22 | 河南理工大学 | Self-adaptive short-circuit calculation method for mine high-voltage distribution network based on tie switch states |
| CN105576622A (en) * | 2016-01-22 | 2016-05-11 | 河南理工大学 | Self-adaptive setting calculation method for single-bus mine high-voltage power grid running in multi-segment way |
| CN106370960A (en) * | 2016-08-15 | 2017-02-01 | 西安科技大学 | Mine's power grid electric leakage identification method based on the real component of the fault instantaneous positive sequence current |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108520131A (en) * | 2018-03-30 | 2018-09-11 | 河南理工大学 | The Underground High-Voltage Power Network short circuit calculation method with incidence matrix is overlapped based on node |
| CN111347927A (en) * | 2020-03-04 | 2020-06-30 | 广东工业大学 | Reconfigurable battery pack switch control method for immune short circuit risk |
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