CN116169652A - 220kV main transformer switch tripping monitoring and distinguishing method - Google Patents
220kV main transformer switch tripping monitoring and distinguishing method Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- 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
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- H—ELECTRICITY
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- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
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Abstract
The invention discloses a 220kV main transformer switch tripping monitoring and distinguishing method, which comprises the following steps: 1. judging a 220kV main transformer tripping unlocking condition; 2. judging the state of a 220kV main transformer switch; 3. and comprehensively judging the 220kV main transformer state. On the premise of improving the safe and reliable operation of the power grid, the labor intensity of monitoring personnel is reduced, and the reaction treatment time of abnormal accidents is shortened; the automation and intelligence degree of the monitoring profession is further improved, and technical support is provided for the conversion from manual discrimination by a monitor to automatic discrimination by a computer.
Description
Technical Field
The invention relates to a tripping monitoring and distinguishing method for a 220kV main transformer switch, and belongs to the technical field of voltage class power grid monitoring.
Background
As the scale of the power grid is continuously enlarged, the number of 220kV substations is also continuously increased, the number of main transformers put into operation is continuously increased, the influence on the lower power grid is wider and wider, and the difficulty in screening and processing the tripping monitoring of the main transformer of the power grid is increased; the monitoring field is still in research state at present for judging tripping of 220kV main transformer switch. When the main transformer switch trips, a monitor needs to simultaneously call pictures related to a plurality of substations, consult relevant data information of each station, and has low accident handling efficiency and excessive dependence on manual judgment on accuracy. Since the tripping state of the main transformer switch is not a simple on-off state monitoring for the monitoring system. The "trip" identified by the monitoring system should be a trip switch that is actuated by the relay protection device. And the following should not be determined to trip:
1) Remote control or on-site operation is carried out to open the switch;
2) And a transmission plate is arranged, and a switch under the condition of maintenance is opened.
In order to improve the tripping identification accuracy of each side switch (high-voltage side, medium-voltage side and low-voltage side switches) of the main transformer, improve the working efficiency of a monitor and accelerate the tripping accident handling process of the 220kV main transformer switch, the tripping monitoring and distinguishing method of the 220kV main transformer switch is provided.
Disclosure of Invention
The invention provides a tripping monitoring and judging method for a 220kV main transformer switch, and aims to solve the technical problem of judging how to trip the 220kV main transformer switch.
The technical solution of the invention is as follows:
a220 kV main transformer switch tripping monitoring and distinguishing method comprises the following steps:
1. judging a 220kV main transformer tripping unlocking condition;
2. judging the state of a 220kV main transformer switch;
3. forming a 220kV main transformer switch operation matrix;
4. forming a tripping matrix of the 220kV main transformer switch;
5. and comprehensively judging the 220kV main transformer state.
The object of the invention can be further achieved by the following technical measures:
the method for monitoring and judging the tripping of the 220kV main transformer switch comprises the following conditions 1-13:
{I Ak1 > 1.1A (condition 1);
{I Ak2 > 1.1A (condition 2);
{I Ak3 > 1.1A (condition 3);
{ cdbh=1 (condition 9);
{ zwsbh=1 (condition 10);
{ ghb=1 (condition 11);
{ ZHB =1 (condition 12);
{ dhb=1 (condition 13);
wherein I is Ak1 Is the remote measurement value of the A-phase current of the main transformer high-voltage side switch, I Ak2 Is the remote measurement value of the A-phase current of the medium-voltage side switch of the main transformer, I Ak3 The remote measurement value of the A-phase current of the switch at the low voltage side of the main transformer, DL Ak1 、DL Bk1 、DL Ck1 Three-phase-separation position remote signaling values of main transformer high-voltage side switch and DL (digital video) Ak2 、DL Bk2 、DL Ck2 Three-phase-separation position remote signaling values of main transformer medium-voltage side switch and DL Ak3 、DL Bk3 、DL Ck3 The remote signaling values of the three-phase separation positions of the switches at the low-voltage side of the main transformer are respectively 1, and the corresponding values of the corresponding switches are respectively 0; CDZP k1 Transmitting a card-setting state remote signaling value for the main transformer high-voltage side switch; CDZP k2 Transmitting a card setting state remote signaling value for the main transformer medium-voltage side switch; CDZP k3 A card-setting state remote signaling value is transmitted for the low-voltage side switch of the main transformer; CDZP T The main transformer body transmission card-setting state remote signaling values are respectively 1 when the responsibility area of the corresponding equipment is a transmission area, and are respectively 0 when the responsibility area of the corresponding equipment is a normal area; PTDX is the main transformer PT disconnection remote signaling value; CTDX is the main transformer CT disconnection remote signaling value, 1 is when the corresponding main transformer interval PT disconnection and the light character plate associated with the CT disconnection are bright red, and 0 is when the associated light character plate is not bright red; CDBH is the remote signaling value of the main transformer differential protection trip outlet; ZWSBH is the remote signaling value of the main transformer heavy gas protection trip outlet; GHB is the remote signaling value of the backup protection tripping outlet of the main transformer; ZHB is the remote signaling value of the backup protection trip outlet in the main transformer; the DHB is the remote signaling value of the backup protection tripping outlet of the main transformer, and is the protection action time value of 1 and the protection inactive time value of 0.
The foregoing method for monitoring and judging tripping operation of 220kV main transformer switch, step 2) the judging 220kV main transformer switch state includes:
2.1 When the monitoring master station system detects that the related remote signaling data simultaneously meets the conditions 7 and 8 and one of the conditions 9 to 13, synthesizing a main transformer switch tripping unlocking signal; the combined main transformer switch tripping unlocking signal is the combined main transformer switch tripping unlocking signal after corresponding conditions are met, at the moment, a main transformer tripping circuit logic judging function is opened, when the tripping conditions are met, a system judges that the switch trips, otherwise, the system does not judge;
2.2 When the monitoring main station system detects that the related remote signaling telemetry data simultaneously meets the conditions 1 and 4, synthesizing corresponding main transformer high-voltage side switch operation;
2.3 When the monitoring main station system detects that the related remote signaling telemetry data simultaneously meets the conditions 2 and 5, synthesizing corresponding main transformer medium-voltage side switch operation;
2.4 When the monitoring main station system detects that the related remote signaling telemetry data simultaneously meets the conditions 3 and 6, synthesizing a corresponding main transformer low-voltage side switch operation;
2.5 When the monitoring master station system detects that the related remote signaling telemetry data does not meet the conditions 1 and 4 at the same time and meets one of the conditions 9 to 13, the corresponding main transformer high-voltage side switch tripping is synthesized;
2.6 When the monitoring master station system detects that the related remote signaling telemetry data does not meet the conditions 2 and 5 at the same time and meets one of the conditions 9 to 13, the corresponding main transformer medium-voltage side switch tripping is synthesized;
2.7 When the monitoring master station system detects that the related remote signaling telemetry data does not meet the conditions 3 and 6 at the same time, and one of the conditions 9 to 13 is met, the corresponding main transformer low-voltage side switch tripping is synthesized.
The method for monitoring and judging the tripping operation of the 220kV main transformer switch comprises the following steps of:
wherein y is 11 、y 12 、y 13 Respectively expressed as the operation of corresponding main transformer high, medium and low voltage side switches, y 21 、y 22 、y 23 The main high, medium and low side switches are respectively represented as non-operation, and the non-operation state of the switch is defined except the operation state, so that
The operation matrix of the 220kV main transformer switch is simplified as follows:
γ 1 、γ 2 and the operation row matrix and the non-operation row matrix in the main transformer switch operation matrix are respectively.
The method for monitoring and judging the tripping of the 220kV main transformer switch comprises the following steps of:
T＝[t 1 t 2 t 3 ](4)
Wherein t is 1 、t 2 、t 3 Respectively indicated as tripping of the corresponding main high, medium and low side switches.
The foregoing method for monitoring and judging tripping operation of 220kV main transformer switch, in step 5), the comprehensive judgment of 220kV main transformer state is judged by the value of criterion P, specifically as follows:
wherein, gamma 1 、γ 2 The operation line matrix and the non-operation line matrix in the main transformer switch operation matrix are respectively, and T is the main transformer switch tripping matrix; "." is calculated as matrix calculation, and corresponding elements of the two matrices are multiplied;
the calculation is matrix calculation, wherein corresponding elements of the two matrices are 0 when all are 0, and at least 1 element is 1 when all are 1; when (when)When the value of the criterion P is 3 and one of the conditions 9 to 13 is satisfied, the tripping of the switches on each side of the main transformer protection action (differential protection, heavy gas protection and other protection) is judged.
Compared with the prior art, the invention has the beneficial effects that:
1) On the premise of improving the safe and reliable operation of the power grid, the labor intensity of monitoring personnel is reduced, and the reaction treatment time of abnormal accidents is shortened;
2) After the tripping alarm of the 220kV main transformer switch is applied to the monitoring main station system, the tripping automatic alarm function of the 220kV main transformer switch is conveniently realized;
3) The automation and intelligence degree of the monitoring profession is further improved, and technical support is provided for the conversion from manual discrimination by a monitor to automatic discrimination by a computer.
Drawings
FIG. 1 is a schematic diagram of the wiring of a 220kV main transformer and three-sided switches thereof in embodiment 1;
fig. 2 is a schematic diagram of the tripping and unlocking logic of the main transformer switch in the embodiment 1;
FIG. 3 is a schematic diagram of the operation logic of the main transformer switch in embodiment 1;
FIG. 4 is a schematic diagram of the trip logic of the main transformer switch in example 1;
FIG. 5 is a schematic diagram of the logic of elements in each state matrix in example 1;
FIG. 6 is a schematic diagram of the trip alarm logic of the main transformer protection action switch of embodiment 1;
fig. 7 is a diagram illustrating the meaning of logic symbols in each logic diagram of example 1.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
As shown in fig. 1, the 220kV main transformer is a generic name of 220kV main transformer in a certain 220kV substation, and is a three-winding transformer.
A220 kV main transformer switch tripping monitoring and distinguishing method comprises the following steps:
1. judging a 220kV main transformer tripping unlocking condition;
2. judging the state of a 220kV main transformer switch;
3. forming a 220kV main transformer switch operation matrix;
4. forming a tripping matrix of the 220kV main transformer switch;
5. and comprehensively judging the 220kV main transformer state.
The above "main transformer switching state" and "main transformer state" are two different concepts, the main transformer state being determined by the main transformer switching state, for example:
the definition of the main transformer running state is as follows: one side and above switches are operated.
The hot standby state of the main transformer is defined as: one side and more switches are hot standby and the remaining side switches are inactive.
The main transformer state mainly judges the running and hot standby states of the main transformer.
For the monitoring system, the tripping state of the main transformer switch is not simply the monitoring of the on-off state. The "trip" identified by the monitoring system should be a trip switch operated by the relay protection device, and the following cases should not be determined to be tripped:
1) Remote control or on-site operation is carried out to open the switch;
2) And a transmission plate is arranged, and a switch under the condition of maintenance is opened.
The step 1) judges the tripping unlocking condition of the 220kV main transformer switch, which comprises the following conditions 1 to 13:
{I Ak1 > 1.1A (condition 1);
{I Ak2 > 1.1A (condition 2);
{I Ak3 > 1.1A (condition 3);
{ cdbh=1 (condition 9);
{ zwsbh=1 (condition 10);
{ ghb=1 (condition 11);
{ ZHB =1 (condition 12);
{ dhb=1 (condition 13);
in the conditions 1-3, A is ampere, and the value of 1.1A is a value obtained by considering the electromagnetic induction effect of the adjacent lines.
I Ak1 Is the remote measurement value of the A-phase current of the main transformer high-voltage side switch, I Ak2 Is the remote measurement value of the A-phase current of the medium-voltage side switch of the main transformer, I Ak3 The remote measurement value of the A-phase current of the switch at the low voltage side of the main transformer, DL Ak1 、DL Bk1 、DL Ck1 Three-phase-separation position remote signaling values of main transformer high-voltage side switch and DL (digital video) Ak2 、DL Bk2 、DL Ck2 Three-phase-separation position remote signaling values of main transformer medium-voltage side switch and DL Ak3 、DL Bk3 、DL Ck3 The remote signaling values of the three-phase separation positions of the switches at the low-voltage side of the main transformer are respectively 1, and the corresponding values of the corresponding switches are respectively 0; CDZP k1 Transmitting a card-setting state remote signaling value for the main transformer high-voltage side switch; CDZP k2 Transmitting a card setting state remote signaling value for the main transformer medium-voltage side switch; CDZP k3 A card-setting state remote signaling value is transmitted for the low-voltage side switch of the main transformer; CDZP T The main transformer body transmission card-setting state remote signaling values are respectively 1 when the responsibility area of the corresponding equipment is a transmission area, and are respectively 0 when the responsibility area of the corresponding equipment is a normal area; PTDX is the main transformer PT disconnection remote signaling value; CTDX is the main partChanging a CT disconnection remote signaling value, wherein the corresponding main interval PT disconnection and the bright red of the associated light character plate of the CT disconnection are 1, and the non-bright red of the associated light character plate is 0; CDBH is the remote signaling value of the main transformer differential protection trip outlet; ZWSBH is the remote signaling value of the main transformer heavy gas protection trip outlet; GHB is the remote signaling value of the backup protection tripping outlet of the main transformer; ZHB is the remote signaling value of the backup protection trip outlet in the main transformer; the DHB is the remote signaling value of the backup protection tripping outlet of the main transformer, and is the protection action time value of 1 and the protection inactive time value of 0.
Responsibility area: in order to facilitate monitoring, all monitoring signals are divided into a plurality of independent areas, different areas are different responsibility areas, and the signals are uploaded to corresponding monitoring responsibility areas through the responsibility areas of the equipment.
Normal region: i.e. the responsibility area of normal monitoring, the equipment in the responsibility area is the equipment of normal operation, and the generated tripping signal is reported to the superior monitoring system and informs the relevant management personnel.
A transmission area: the device in the responsibility area is generally maintenance device or informal operation device, the generated tripping signal can not be reported to the superior monitoring system, and the generated signal can not appear in the normal area.
The step 2) of determining the 220kV main transformer switch state includes:
2.1 As shown in fig. 2, when the monitoring master station system detects that the related remote signaling data simultaneously meets the conditions 7 and 8 and one of the conditions 9 to 13, a main transformer switch tripping unlocking signal is synthesized; the combined main transformer switch tripping unlocking signal is the combined main transformer switch tripping unlocking signal after corresponding conditions are met, at the moment, a main transformer tripping circuit logic judging function is opened, and when the tripping conditions are met, the system judges that the switch trips, otherwise, the system does not judge. The main transformer switch tripping unlocking is used as a main transformer switch tripping locking condition, when a certain side switch or a three-side switch trips simultaneously, the system synthesizes a main transformer switch tripping signal only when the main transformer switch tripping unlocking condition is opened, and if only the main transformer switch trips, the main transformer switch tripping unlocking is not opened, and the monitoring system does not report the main transformer switch tripping.
As shown in fig. 3:
2.2 When the monitoring main station system detects that the related remote signaling telemetry data simultaneously meets the conditions 1 and 4, synthesizing corresponding main transformer high-voltage side switch operation;
2.3 When the monitoring main station system detects that the related remote signaling telemetry data simultaneously meets the conditions 2 and 5, synthesizing corresponding main transformer medium-voltage side switch operation;
2.4 When the monitoring main station system detects that the related remote signaling telemetry data simultaneously meets the conditions 3 and 6, synthesizing a corresponding main transformer low-voltage side switch operation;
as shown in fig. 4:
2.5 When the monitoring master station system detects that the related remote signaling telemetry data does not meet the conditions 1 and 4 at the same time and meets one of the conditions 9 to 13, the corresponding main transformer high-voltage side switch tripping is synthesized;
2.6 When the monitoring master station system detects that the related remote signaling telemetry data does not meet the conditions 2 and 5 at the same time and meets one of the conditions 9 to 13, the corresponding main transformer medium-voltage side switch tripping is synthesized;
2.7 When the monitoring master station system detects that the related remote signaling telemetry data does not meet the conditions 3 and 6 at the same time, and one of the conditions 9 to 13 is met, the corresponding main transformer low-voltage side switch tripping is synthesized.
As shown in fig. 5, the forming of the 220kV main transformer switch operation matrix in the foregoing step 3) is as follows:
wherein y is 11 、y 12 、y 13 Respectively expressed as the operation of corresponding main transformer high, medium and low voltage side switches, y 21 、y 22 、y 23 Respectively expressed as corresponding main transformer high, medium and low voltage side switchThe switch is not operated, and the switch is not operated except the operation state, so that
The operation matrix of the 220kV main transformer switch is simplified as follows:
γ 1 、γ 2 and the operation row matrix and the non-operation row matrix in the main transformer switch operation matrix are respectively.
The tripping matrix of the 220kV main transformer switch is formed by the step 4) as follows:
T＝[t 1 t 2 t 3 ](4)
Wherein t is 1 、t 2 、t 3 Respectively indicated as tripping of the corresponding main high, medium and low side switches.
As shown in fig. 6, the comprehensive determination of 220kV main transformer status in the foregoing step 5) is determined by the value of the criterion P, and specifically is as follows:
wherein, gamma 1 、γ 2 The operation line matrix and the non-operation line matrix in the main transformer switch operation matrix are respectively, and T is the main transformer switch tripping matrix; "." is calculated as matrix calculation, and corresponding elements of the two matrices are multiplied;
the calculation is matrix calculation, wherein corresponding elements of the two matrices are 0 when all are 0, and at least 1 element is 1 when all are 1; when the value of the criterion P is 3 and one of the conditions 9 to 13 is satisfied, the switch on each side of the main transformer protection action (differential protection, heavy gas protection and the like) is judged to trip.
The state of the main transformer is judged through the main transformer switch operation matrix Y and the main transformer switch tripping matrix T.
Under normal conditions, namely the switch position is consistent with the trip position, the P value obtained by the calculation of the formula 5 is always 3;
in abnormal situations, i.e. inconsistent switch position and trip position, the reasons for this include switch failure or switch surreptitious tripping, etc., where the calculated P value is less than 3.
Example 1:
the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments.
220kV main transformer of certain station
{I Ak1 > 1.1A (condition 1);
{I Ak2 > 1.1A (condition 2);
{I Ak3 > 1.1A (condition 3);
{ cdbh=1 (condition 9);
{ zwsbh=1 (condition 10);
{ ghb=1 (condition 11);
{ ZHB =1 (condition 12);
{ dhb=1 (condition 13);
when the monitoring master station system detects relevant telemetry data, the method simultaneously meets the following conditions:
the method comprises the steps that a 'main transformer switch tripping unlocking signal' is synthesized when the conditions 7 and 8 are met and one of the conditions 9 to 13 is met;
the conditions 1 and 4 are satisfied, and the corresponding main transformer high-voltage side switch operation is synthesized;
the conditions 2 and 5 are satisfied, and the corresponding main transformer medium-voltage side switch operation is synthesized;
and (3) meeting the conditions 3 and 6, and synthesizing the corresponding main transformer low-voltage side switch operation.
The 220kV main transformer switch operation matrix is formed as shown in the following formulas 1-2:
wherein y is 11 、y 12 、y 13 Respectively expressed as the operation of corresponding main transformer high, medium and low voltage side switches, y 21 、y 22 、y 23 The main high, medium and low side switches are respectively represented as non-operation, and the non-operation state of the switch is defined except the operation state, so that
The operation matrix of the 220kV main transformer switch is simplified as follows 3:
and (3) meeting the conditions 1 and 4 and one of the conditions 9 to 13, and synthesizing 'corresponding main transformer high-voltage side switch tripping'.
And (3) meeting the conditions 2 and 5 and one of the conditions 9 to 13, and synthesizing the corresponding main transformer medium-voltage side switch trip.
And (3) meeting the conditions 3 and 6 and one of the conditions 9 to 13, and synthesizing 'corresponding main transformer low-voltage side switch tripping'.
The trip matrix for forming the 220kV main transformer switch is shown in the following formula 4:
T＝[t 1 t 2 t 3 ](4)
Wherein t is 1 、t 2 、t 3 Respectively indicated as tripping of the corresponding main high, medium and low side switches.
Comprehensively judging the 220kV main transformer state:
judging through the value of the criterion P, and specifically adopting the following formula 5:
wherein, gamma 1 、γ 2 The operation line matrix and the non-operation line matrix in the main transformer switch operation matrix are respectively, and T is the main transformer switch tripping matrix. "." is calculated as a matrix, with the corresponding elements of the two matrices multiplied.
The calculation is matrix calculation, the corresponding elements of the two matrices are 0 when all are 0, and at least 1 matrix is 1 when all are 1. When the value of the criterion P is 3 and one of the conditions 9 to 13 is met, the main transformer protection action switch is judged to be tripped.
The invention relates to the technical field of 220kV voltage class power grid monitoring, which is convenient to utilize partial telemetry and remote signaling data collected by a monitoring main station system, and reminds monitoring personnel to process timely by judging the phase A current of a three-side switch of a 220kV main transformer, the three-phase position of a breaker and main protection and backup protection outlets of various transformers, and when the monitoring main station system meets the set logic conditions, the monitoring system reports a tripping alarm signal of a corresponding 220kV main transformer switch; the invention only uses the existing telemetry and remote signaling data, does not need to newly add other measuring equipment, only adds advanced application in a monitoring main station system, is widely applicable to 220kV voltage class transformers, and can synthesize a tripping alarm signal of a 220kV main transformer switch by using the current technical conditions under the condition of not adding equipment.
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 (6)
1. The 220kV main transformer switch tripping monitoring and distinguishing method is characterized by comprising the following steps of:
1) Judging a 220kV main transformer tripping unlocking condition;
2) Judging the state of a 220kV main transformer switch;
3) Forming a 220kV main transformer switch operation matrix;
4) Forming a tripping matrix of the 220kV main transformer switch;
5) And comprehensively judging the 220kV main transformer state.
2. The method for monitoring and judging the tripping operation of the 220kV main transformer switch according to claim 1, wherein the step 1) is used for judging the tripping and unlocking condition of the 220kV main transformer switch, and comprises the following conditions 1 to 13:
{I Ak1 > 1.1A (condition 1);
{I Ak2 > 1.1A (condition 2);
{I Ak3 > 1.1A (condition 3);
{ cdbh=1 (condition 9);
{ zwsbh=1 (condition 10);
{ ghb=1 (condition 11);
{ ZHB =1 (condition 12);
{ dhb=1 (condition 13);
wherein I is Ak1 Is the remote measurement value of the A-phase current of the main transformer high-voltage side switch, I Ak2 Is the remote measurement value of the A-phase current of the medium-voltage side switch of the main transformer, I Ak3 The remote measurement value of the A-phase current of the switch at the low voltage side of the main transformer, DL Ak1 、DL Bk1 、DL Ck1 Three-phase-separation position remote signaling values of main transformer high-voltage side switch and DL (digital video) Ak2 、DL Bk2 、DL Ck2 Three-phase-separation position remote signaling values of main transformer medium-voltage side switch and DL Ak3 、DL Bk3 、DL Ck3 The remote signaling values of the three-phase separation positions of the switches at the low-voltage side of the main transformer are respectively 1, and the corresponding values of the corresponding switches are respectively 0; CDZP k1 Transmitting a card-setting state remote signaling value for the main transformer high-voltage side switch; CDZP k2 Transmitting a card setting state remote signaling value for the main transformer medium-voltage side switch; CDZP k3 A card-setting state remote signaling value is transmitted for the low-voltage side switch of the main transformer; CDZP T The main transformer body transmission card-setting state remote signaling values are respectively 1 when the responsibility area of the corresponding equipment is a transmission area, and are respectively 0 when the responsibility area of the corresponding equipment is a normal area; PTDX is the main transformer PT disconnection remote signaling value; CTDX is the remote signaling value of the main transformer CT disconnection, and corresponds to the light character plate bright red associated with the main transformer interval PT disconnection and CT disconnection1 when the color is not bright red, and 0 when the associated light character plate is not bright red; CDBH is the remote signaling value of the main transformer differential protection trip outlet; ZWSBH is the remote signaling value of the main transformer heavy gas protection trip outlet; GHB is the remote signaling value of the backup protection tripping outlet of the main transformer; ZHB is the remote signaling value of the backup protection trip outlet in the main transformer; the DHB is the remote signaling value of the backup protection tripping outlet of the main transformer, and is the protection action time value of 1 and the protection inactive time value of 0.
3. The method for monitoring and judging the tripping operation of a 220kV main transformer switch according to claim 1, wherein the step 2) of judging the state of the 220kV main transformer switch comprises:
2.1 When the monitoring master station system detects that the related remote signaling data simultaneously meets the conditions 7 and 8 and one of the conditions 9 to 13, synthesizing a main transformer switch tripping unlocking signal; the combined main transformer switch tripping unlocking signal is the combined main transformer switch tripping unlocking signal after corresponding conditions are met, at the moment, a main transformer tripping circuit logic judging function is opened, when the tripping conditions are met, a system judges that the switch trips, otherwise, the system does not judge;
2.2 When the monitoring main station system detects that the related remote signaling telemetry data simultaneously meets the conditions 1 and 4, synthesizing corresponding main transformer high-voltage side switch operation;
2.3 When the monitoring main station system detects that the related remote signaling telemetry data simultaneously meets the conditions 2 and 5, synthesizing corresponding main transformer medium-voltage side switch operation;
2.4 When the monitoring main station system detects that the related remote signaling telemetry data simultaneously meets the conditions 3 and 6, synthesizing a corresponding main transformer low-voltage side switch operation;
2.5 When the monitoring master station system detects that the related remote signaling telemetry data does not meet the conditions 1 and 4 at the same time and meets one of the conditions 9 to 13, the corresponding main transformer high-voltage side switch tripping is synthesized;
2.6 When the monitoring master station system detects that the related remote signaling telemetry data does not meet the conditions 2 and 5 at the same time and meets one of the conditions 9 to 13, the corresponding main transformer medium-voltage side switch tripping is synthesized;
2.7 When the monitoring master station system detects that the related remote signaling telemetry data does not meet the conditions 3 and 6 at the same time, and one of the conditions 9 to 13 is met, the corresponding main transformer low-voltage side switch tripping is synthesized.
4. The method for monitoring and judging tripping operation of a 220kV main transformer switch according to claim 1, wherein in the step 3), a 220kV main transformer switch operation matrix is formed as follows:
wherein y is 11 、y 12 、y 13 Respectively expressed as the operation of corresponding main transformer high, medium and low voltage side switches, y 21 、y 22 、y 23 The main high, medium and low side switches are respectively represented as non-operation, and the non-operation state of the switch is defined except the operation state, so that
The operation matrix of the 220kV main transformer switch is simplified as follows:
γ 1 、γ 2 and the operation row matrix and the non-operation row matrix in the main transformer switch operation matrix are respectively.
5. The method for monitoring and judging the tripping operation of the 220kV main transformer switch according to claim 1, wherein in the step 4), the tripping matrix of the 220kV main transformer switch is formed as follows:
T＝[t 1 t 2 t 3 ](4)
Wherein t is 1 、t 2 、t 3 Respectively indicated as tripping of the corresponding main high, medium and low side switches.
6. The method for monitoring and judging the tripping operation of the 220kV main transformer switch according to claim 1, wherein in the step 5), the comprehensive judgment of the state of the 220kV main transformer is carried out through the judgment of the value of a criterion P, and the method is characterized by comprising the following specific steps:
wherein, gamma 1 、γ 2 The operation line matrix and the non-operation line matrix in the main transformer switch operation matrix are respectively, and T is the main transformer switch tripping matrix; "." is calculated as matrix calculation, and corresponding elements of the two matrices are multiplied;
the calculation is matrix calculation, wherein corresponding elements of the two matrices are 0 when all are 0, and at least 1 element is 1 when all are 1; when the value of the criterion P is 3 and one of the conditions 9 to 13 is met, the switch on each side of the main transformer protection action is judged to be tripped. />
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