CN115308535B - 220kV bus fault discrimination method based on monitoring information eventing system - Google Patents
220kV bus fault discrimination method based on monitoring information eventing system Download PDFInfo
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Abstract
The invention discloses a 220kV bus fault judging method based on a monitoring information eventing system. The technical scheme of the invention is as follows: firstly, starting bus fault event synthesis by bus protection outlet signals; then calculating a bus operation matrix according to the operation state of the substation equipment in the monitoring information eventing system; then calculating a bus tripping matrix according to the real-time tripping information of the power grid; and finally, calculating a bus tripping characteristic value by using the bus operation matrix and the bus tripping matrix, and judging the bus fault position condition according to the magnitude of the characteristic value. The method can realize automatic discrimination of the fault position of the 220kV bus of the transformer substation, effectively reduce the difficulty of discriminating the bus faults of monitoring personnel, improve the monitoring efficiency of the monitoring personnel, and save more time for subsequent accident disposal.
Description
Technical Field
The invention relates to a 220kV bus fault judging method based on a monitoring information eventing system, and belongs to the technical field of power grid regulation and control operation and substation signal monitoring.
Background
Along with the gradual popularization of the centralized control mode of the transformer substation, the analysis and judgment pressures brought by massive monitoring alarm information to daily monitoring work are increasingly prominent, and how to avoid missed monitoring and misjudgment become one of the problems to be solved in monitoring business. The monitoring information eventing system is a practical monitoring alarm signal analysis and judgment tool at present, and according to defined object templates and rules, relevant alarm information is combined, and finally an abnormal event is generated. The existing monitoring information eventing system can realize event synthesis of common faults such as line faults, main transformer faults, bus faults and the like, but can only judge faults when the bus faults occur, and can not judge fault positions, if the bus is tripped, the monitoring personnel experience is combined to judge the faults automatically, the risks of missed judgment and misjudgment exist, and a large amount of accident processing time is occupied.
Disclosure of Invention
The invention aims to provide a 220kV bus fault judging method based on a monitoring information eventing system, which realizes the judgment of bus fault positions and the synthesis of fault events and improves the functions of the monitoring information eventing system.
The aim of the invention is realized by the following technical scheme:
a220 kV bus fault discrimination method based on a monitoring information eventing system comprises the following steps:
step (1): starting bus fault event synthesis by bus protection outlet signals;
step (2): calculating a bus operation matrix according to the operation state of substation equipment in the monitoring information eventing system;
step (3): calculating a bus tripping matrix according to the real-time tripping information of the power grid;
step (4): and calculating a tripping characteristic value of the positive bus and the auxiliary bus by using the bus operation matrix and the bus tripping matrix, and judging the fault position condition of the bus according to the magnitude of the characteristic value.
The object of the invention can be further achieved by the following technical measures:
further, the step (1) includes the steps of:
1) Build a 220kV bus protection outlet feature:
the states of the signals 220kV bus differential protection outlet, 220kV charging protection outlet and 220kV bus linkage overcurrent protection outlet are represented by a, b and c, wherein a, b and c are 0/1 variable, 0 represents that the signal is not operated, 1 represents that the signal is operated, and the logic calculation formula of the characteristic value M of the 220kV bus protection outlet is as follows:
M＝a∨b∨c (1)
as can be seen from the formula (1), when any protection outlet signal acts, M is 1, and at the moment, the 220kV bus protection is judged to be already exported;
2) Starting bus fault event synthesis in a monitoring information eventing system:
setting the 220kV bus protection outlet as the main characteristic of the 220kV bus fault, automatically starting the judgment of the 220kV bus fault event when the characteristic value of the characteristic is 1, and judging the 220kV bus fault if other characteristics of the event are met at the same time.
Further, the step (2) includes the steps of:
1) Constructing a breaker position vector:
position vector DW of circuit breaker i i Expressed as:
wherein z is i1 、z i0 、f i1 、f i0 The variables are 0/1, and respectively represent that the circuit breaker operates on a positive bus, a non-positive bus, a secondary bus and a non-secondary bus;
z i1 、z i0 、f i1 、f i0 the operation state of the breaker and the operation state of the disconnecting link are calculated, and the calculation formula is as follows:
wherein the symbols are
Representing the negation, k i 、d i1 、d i2 、d i3 Are all 0/1 variable, k i For the position of the circuit breaker i, k i =0 indicates that the circuit breaker is in the split position, k i =1 indicates that the circuit breaker is in the closed position; d, d i1 The position d of the positive bus disconnecting link of the circuit breaker i i1 =0 indicates that the positive bus disconnecting link of the circuit breaker i is in the split position, and conversely indicates that the positive bus disconnecting link is in the on position; d, d i2 The position d of the secondary bus disconnecting link of the circuit breaker i i2 =0 indicates that the secondary busbar switch of the circuit breaker i is in the split position, and conversely indicates that the secondary busbar switch is in the on position; d, d i3 The position d of the line side disconnecting link of the circuit breaker i i3 =0 indicates that the circuit breaker i line side switch is in the split position, whereas it indicates in the on position;
2) Constructing a bus operation matrix:
the bus operation matrix Y is synthesized by position vectors of all the circuit breakers on the bus and is used for representing the operation state before the bus faults, and the calculation formula is as follows:
Y＝[DW 1 DW 2 … DW n ] (7)
wherein n is the total number of switches connected on the bus.
Further, the step (3) includes the steps of:
1) The method comprises the steps of constructing a '220 kV breaker bus fault tripping' feature:
the logic calculation formula of the characteristic value t of the '220 kV breaker bus fault tripping' is as follows:
wherein t is i A characteristic value representing the breaker i; k (k) i ＝1→k i =0 indicates that the position of the circuit breaker i changes from 1 to 0, i.e., from closed to open; i i A secondary current value representing the breaker i; p (P) i The protection action condition of the circuit breaker i is represented, and the calculation formula is as follows:
P i ＝d∨e∨f (9)
d, e and f are all 0/1 variables, and respectively represent the states of signals of a differential protection outlet, a distance protection outlet and an overcurrent protection outlet of the circuit breaker, wherein when the states are 0, the signals are not operated, and when the states are 1, the signals are operated;
2) Constructing a bus trip matrix:
220kV bus tripping matrix T consists of fault tripping characteristics T of all circuit breakers on a bus i The synthesis is used for representing the tripping condition of the switch on the bus, and the calculation formula is as follows:
T＝[t 1 t 2 … t n ] (10)
where n represents the total number of circuit breakers connected to the bus.
Further, the step (4) includes the steps of:
1) Calculating a positive bus tripping characteristic value TZ:
as can be obtained from the formulas (2) and (7), the bus bar operation matrix Y can be expressed as:
wherein y is 1 、y 2 、y 3 、y 4 The method comprises the steps of respectively obtaining a positive mother operation matrix, a non-positive mother operation matrix, a secondary mother operation matrix and a non-secondary mother operation matrix;
the calculation formula of the positive bus trip characteristic value TZ is as follows: tz= | (y) 1 ·T)∨y 2 | 2 (12) In the formula, matrix multiplication is represented;
2) Calculating a secondary bus trip characteristic value TF:
the calculation formula of the auxiliary bus trip characteristic value TF is as follows: tf= | (y) 3 ·T)∨y 4 | 2 (13)；
3) Judging the fault position of the bus:
when the positive bus tripping characteristic value TZ=n and the auxiliary bus tripping characteristic value TF is not equal to n, judging that the positive bus fails, wherein n is the total number of the circuit breakers connected on the bus; when the positive bus tripping characteristic value TZ is not equal to n and the auxiliary bus tripping characteristic value TF=n, judging that the auxiliary bus fails; when the positive bus trip characteristic value TZ is not equal to n and the auxiliary bus trip characteristic value TF is not equal to n, the composite bus fault is judged.
Compared with the prior art, the invention has the beneficial effects that:
1. the 220kV bus fault judging method based on the monitoring information eventing system can automatically synthesize bus fault events and judge fault positions according to the monitoring alarm information, and avoid information missing monitoring and misjudgment; 2. the method can effectively distinguish the faults of the positive bus and the auxiliary bus, and saves time for monitoring subsequent accident treatment.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic diagram of a typical 220kV double bus connection;
FIG. 3 is a "220kV bus protection Outlet" feature synthesis logic;
FIG. 4 is circuit breaker positive bus operating feature synthesis logic;
FIG. 5 is circuit breaker sub-bus operational feature synthesis logic;
fig. 6 is circuit breaker busbar fault tripping feature synthesis logic.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
FIG. 1 is a flow chart of the present invention, first initiating a synthesis of a bus fault class event from a bus protection exit signal; calculating a position vector of the circuit breaker according to the running states of the circuit breaker and the corresponding disconnecting link, and further obtaining a bus running matrix representing the running states of the bus switch; defining a bus fault tripping characteristic of the circuit breaker according to the position change of the circuit breaker and the unprotected outlet, and synthesizing a bus tripping matrix by the bus fault tripping characteristics of all the circuit breakers on the bus; and finally, calculating a tripping characteristic value of the positive bus and the auxiliary bus according to the bus operation matrix and the bus tripping matrix, and judging the bus fault position according to the magnitude of the characteristic value.
FIG. 2 shows a schematic diagram of a typical 220kV double-bus wiring, n circuit breakers are connected to a bus, the black ground color indicates that the circuit breakers are in the on-position, and the white ground color indicates that the circuit breakers are in the off-position, k 1 —k 5 The operation states of the system are respectively operating on the auxiliary bus, operating on the positive bus, using the hot standby for the auxiliary bus, using the hot standby for the positive bus and using the cold standby. Referring to fig. 1 and 2, the method has the steps of:
step 1, starting bus fault event synthesis by a bus protection outlet signal:
(1) Build a 220kV bus protection outlet feature:
the states of the signals 220kV bus differential protection outlet, 220kV charging protection outlet and 220kV bus linkage overcurrent protection outlet are represented by a, b and c. a. b and c are 0/1 variables, 0 indicating that the signal is not active, and 1 indicating that the signal is active. As shown in fig. 3, the logic calculation formula of the characteristic value M of the "220kV bus protection outlet" is:
M＝a∨b∨c (1)
as can be seen from the formula (1), M is 1 when any protection outlet signal is operated, and at this time, it is determined that 220kV bus protection has been exported.
(2) Starting bus fault event synthesis in a monitoring information eventing system:
setting the 220kV bus protection outlet as the main characteristic of the 220kV bus fault, automatically starting the judgment of the 220kV bus fault event when the characteristic value of the characteristic is 1, and judging the 220kV bus fault if other characteristics of the event are met at the same time.
Step 2, calculating a bus operation matrix according to the operation state of substation equipment in the monitoring information eventing system
(3) Constructing a breaker position vector:
position vector DW of circuit breaker i i Can be expressed as:
wherein z is i1 、z i0 、f i1 、f i0 The variables are 0/1, and the variables respectively indicate that the circuit breaker operates on a positive bus, a non-positive bus, a secondary bus and a non-secondary bus.
z i1 、z i0 、f i1 、f i0 The calculation formula shown in fig. 4 and 5 can be calculated from the operating state of the circuit breaker and the operating state of the disconnecting link as follows:
wherein k is i 、d i1 、d i2 、d i3 Are all 0/1 variables. k (k) i For the position of the circuit breaker i, k i =0 indicates that the circuit breaker is in the split position, k i =1 indicates that the circuit breaker is in the closed position; d, d i1 The position d of the positive bus disconnecting link of the circuit breaker i i1 =0 indicates that the positive bus disconnecting link of the circuit breaker i is in the split position, and conversely indicates that the positive bus disconnecting link is in the on position; d, d i2 The position d of the secondary bus disconnecting link of the circuit breaker i i2 =0 indicates that the auxiliary bus switch of the circuit breaker is in the separated position, and conversely indicates that the auxiliary bus switch is in the combined position；d i3 The position d of the line side disconnecting link of the circuit breaker i i3 =0 indicates that the circuit breaker i line side switch is in the split position, and conversely indicates in the on position.
(4) Constructing a bus operation matrix:
the bus operation matrix Y is synthesized by position vectors of all the circuit breakers on the bus, can be used for representing the operation state before the bus faults, and has the following calculation formula:
Y＝[DW 1 DW 2 … DW n ] (7)
wherein n is the total number of switches connected on the bus.
Step 3, calculating a bus tripping matrix according to the real-time tripping information of the power grid:
(5) The method comprises the steps of constructing a '220 kV breaker bus fault tripping' feature:
the logic calculation formula of the characteristic value t of the '220 kV breaker bus fault tripping' is shown in fig. 6:
wherein t is i A characteristic value representing the breaker i; k (k) i ＝1→k i =0 indicates that the position of the circuit breaker i changes from 1 to 0, i.e., from closed to open; i i A secondary current value representing the breaker i; p (P) i The protection action condition of the circuit breaker i is represented, and the calculation formula is as follows:
P i ＝d∨e∨f (9)
wherein d, e and f are all 0/1 variables, and respectively represent the states of signals of a differential protection outlet, a distance protection outlet and an overcurrent protection outlet of the circuit breaker, wherein when the states are 0, the signals are not operated, and when the states are 1, the signals are operated.
(6) Constructing a bus trip matrix:
220kV bus tripping matrix T consists of fault tripping characteristics T of all circuit breakers on a bus i The combination can be used for representing the tripping condition of a switch on a bus, and the calculation formula is as follows:
T＝[t 1 t 2 … t n ] (10)
where n represents the total number of circuit breakers connected to the bus.
Step 4, calculating a tripping characteristic value of the positive bus and the auxiliary bus by using the bus operation matrix and the bus tripping matrix, and judging the fault position condition of the bus according to the magnitude of the characteristic value:
(7) Calculating a positive bus tripping characteristic value TZ:
as can be obtained from the formulas (2) and (7), the bus bar operation matrix Y can be expressed as:
wherein y is 1 、y 2 、y 3 、y 4 The method comprises a positive mother operation matrix, a non-positive mother operation matrix, a secondary mother operation matrix and a non-secondary mother operation matrix.
The calculation formula of the positive bus trip characteristic value TZ is as follows: tz= | (y) 1 ·T)∨y 2 | 2 (12)
(8) Calculating a secondary bus trip characteristic value TF:
the calculation formula of the auxiliary bus trip characteristic value TF is as follows: tf= | (y) 3 ·T)∨y 4 | 2 (13)
(9) Judging the fault position of the bus:
when the positive bus tripping characteristic value TZ=n and the auxiliary bus tripping characteristic value TF is not equal to n, judging that the positive bus fails, wherein n is the total number of the circuit breakers connected on the bus; when the positive bus tripping characteristic value TZ is not equal to n and the auxiliary bus tripping characteristic value TF=n, judging that the auxiliary bus fails; when the positive bus trip characteristic value TZ is not equal to n and the auxiliary bus trip characteristic value TF is not equal to n, the composite bus fault is judged.
In addition to the above embodiments, other embodiments of the present invention are possible, and all technical solutions formed by equivalent substitution or equivalent transformation are within the scope of the present invention.
Claims (1)
1. A220 kV bus fault judging method based on a monitoring information eventing system is characterized by comprising the following steps:
step (1), starting bus fault event synthesis by bus protection outlet signals; the method comprises the following steps:
1) Build a 220kV bus protection outlet feature:
the states of the signals 220kV bus differential protection outlet, 220kV charging protection outlet and 220kV bus-connected overcurrent protection outlet are represented by a, b and c, wherein a, b and c are 0/1 variable, 0 represents that the signal is not operated, 1 represents that the signal is operated, and the logic calculation formula of the characteristic value M of the 220kV bus protection outlet is as follows:
M＝a∨b∨c(1)
as can be seen from the formula (1), when any protection outlet signal acts, M is 1, and at the moment, the 220kV bus protection is judged to be already exported;
2) Starting bus fault event synthesis in a monitoring information eventing system:
setting a 220kV bus protection outlet as a main characteristic of 220kV bus faults, automatically starting the judgment of a 220kV bus fault event when the characteristic value of the main characteristic is 1, and judging that the 220kV bus faults exist if other characteristics of the event are met at the same time;
step (2) calculating a bus operation matrix according to the operation state of substation equipment in the monitoring information eventing system; the method comprises the following steps:
1) Constructing a breaker position vector:
position vector DW of circuit breaker i i Expressed as:
wherein z is i1 、z i0 、f i1 、f i0 The variables are 0/1, and respectively represent that the circuit breaker operates on a positive bus, a non-positive bus, a secondary bus and a non-secondary bus;
z i1 、z i0 、f i1 、f i0 the operation state of the breaker and the operation state of the disconnecting link are calculated, and the calculation formula is as follows:
wherein the symbols are
Representing the negation, k i 、d i1 、d i2 、d i3 Are all 0/1 variable, k i For the position of the circuit breaker i, k i =0 indicates that the circuit breaker is in the split position, k i =1 indicates that the circuit breaker is in the closed position; d, d i1 The position d of the positive bus disconnecting link of the circuit breaker i i1 =0 indicates that the positive bus disconnecting link of the circuit breaker i is in the split position, and conversely indicates that the positive bus disconnecting link is in the on position; d, d i2 The position d of the secondary bus disconnecting link of the circuit breaker i i2 =0 indicates that the secondary busbar switch of the circuit breaker i is in the split position, and conversely indicates that the secondary busbar switch is in the on position; d, d i3 The position d of the line side disconnecting link of the circuit breaker i i3 =0 indicates that the circuit breaker i line side switch is in the split position, whereas it indicates in the on position;
2) Constructing a bus operation matrix:
the bus operation matrix Y is synthesized by position vectors of all the circuit breakers on the bus and is used for representing the operation state before the bus faults, and the calculation formula is as follows:
Y＝[DW 1 DW 2 … DW n ] (7)
wherein n is the total number of circuit breakers connected on the bus;
calculating a bus tripping matrix according to the real-time tripping information of the power grid; the method comprises the following steps:
1) The method comprises the steps of constructing a '220 kV breaker bus fault tripping' feature:
the logic calculation formula of the characteristic value t of the '220 kV breaker bus fault tripping' is as follows:
wherein the symbols are
Representing the negation operation, t i A characteristic value representing the breaker i; k (k) i ＝1→k i =0 indicates that the position of the circuit breaker i changes from 1 to 0, i.e., from closed to open; i i A secondary current value representing the breaker i; p (P) i The protection action condition of the circuit breaker i is represented, and the calculation formula is as follows:
P i ＝d∨e∨f (9)
d, e and f are all 0/1 variables, and respectively represent the states of signals of a differential protection outlet, a distance protection outlet and an overcurrent protection outlet of the circuit breaker, wherein when the states are 0, the signals are not operated, and when the states are 1, the signals are operated;
2) Constructing a bus trip matrix:
220kV bus tripping matrix T consists of fault tripping characteristics T of all circuit breakers on a bus i The synthesis is used for representing the tripping condition of the switch on the bus, and the calculation formula is as follows:
T＝[t 1 t 2 … t n ] (10)
wherein n represents the total number of circuit breakers connected to the bus;
calculating a tripping characteristic value of the positive bus and the auxiliary bus by using the bus operation matrix and the bus tripping matrix, and judging the fault position condition of the bus according to the magnitude of the characteristic value; the method comprises the following steps:
1) Calculating a positive bus tripping characteristic value TZ:
the busbar operation matrix Y is expressed as:
wherein y is 1 、y 2 、y 3 、y 4 The method comprises the steps of respectively obtaining a positive mother operation matrix, a non-positive mother operation matrix, a secondary mother operation matrix and a non-secondary mother operation matrix;
the calculation formula of the positive bus trip characteristic value TZ is as follows: tz= | (y) 1 ·T)∨y 2 | 2 (12)，
In the formula, matrix multiplication is represented;
2) Calculating a secondary bus trip characteristic value TF:
the calculation formula of the auxiliary bus trip characteristic value TF is as follows: tf= | (y) 3 ·T)∨y 4 | 2 (13)；
3) Judging the fault position of the bus:
when the positive bus tripping characteristic value TZ=n and the auxiliary bus tripping characteristic value TF is not equal to n, judging that the positive bus fails, wherein n is the total number of the circuit breakers connected on the bus; when the positive bus tripping characteristic value TZ is not equal to n and the auxiliary bus tripping characteristic value TF=n, judging that the auxiliary bus fails; when the positive bus trip characteristic value TZ is not equal to n and the auxiliary bus trip characteristic value TF is not equal to n, the composite bus fault is judged.
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| CN118199000A (en) * | 2024-02-06 | 2024-06-14 | 国网江苏省电力有限公司镇江供电分公司 | 110KV single bus trip and spare power automatic switching judging method based on monitoring information eventing system |
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