CN110829352B - Multi-principle time division sequence fault identification and control method and device in stability control system - Google Patents
Multi-principle time division sequence fault identification and control method and device in stability control system Download PDFInfo
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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
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- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
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Abstract
The invention discloses a multi-principle sub-timing sequence fault recognition and control method and a device in a stability control system, wherein a trip criterion is selected from three modes of pure electric quantity fault trip criterion, backup trip criterion and fault trip criterion combined with a protection signal according to the electric quantity characteristics of a break variable starting element to judge a fault; according to the sudden change starting time, the sudden change starting current amplitude, the fault judging time, the current amplitude and the steady-state current amplitude at the fault judging time, the fault occurrence time is reversely deduced, and the fault judging time is calculated; and finally, determining a fault control measure according to the current working condition, the fault element and the fault judgment time. The method effectively solves the problem that the fault identification of the current stability control system depends on a protection action signal, and has high reliability.
Description
Technical Field
The invention relates to a multi-principle time-division sequence fault identification and control method and device in a stability control system, and belongs to the technical field of safety and stability control of electric power systems.
Background
The safety and stability control device is control equipment arranged in a power plant or a transformer substation for ensuring the stability of a power system when encountering large disturbance, realizes the functions of generator tripping, load shedding, quick output reduction, emergency lifting or drop-back of direct current power and the like, and is important equipment for keeping the safe and stable operation of the power system. The safety and stability control system is a system formed by two or more safety and stability control devices of plant stations through communication, and realizes stable control of an electric power system in an area or a larger range.
In the existing safety and stability control device, the criterion for component fault tripping requires that the electrical quantity meets the condition and an action signal of a relay protection device is received. The reliability of fault judgment of the relay protection device can be fully utilized by combining action signals of the relay protection device in the criterion, but the problems also exist: firstly, depending on an action signal of a relay protection device, the fault judgment time lags behind the relay protection device; if the main protection of the relay protection is refused to be operated, and if a backup protection action signal is connected into the safety and stability control device, the time for the safety and stability control device to recognize fault tripping is prolonged; if the backup protection action signal is not connected to the safety and stability control device, the device refuses to operate; if the relay protection main protection and the backup protection are refused to operate, the safety and stability control device cannot identify fault tripping operation, and the device refuses to operate; and fourthly, if the relay protection device action signal is transmitted to a safety and stability control device loop to cause a problem, the safety and stability control device cannot identify fault tripping and the device refuses to operate.
At present, a safety and stability control system mainly has two modes, one mode is 'offline decision making and real-time matching', the other mode is 'online pre-decision making and real-time matching', the two modes are set for precaution against an expected fault, and once a safety and stability control device monitors a component fault, a control measure of the component fault under the current working condition is searched and immediately executed. In the current control strategy, for the same fault control measure, the length of fault discrimination time (directly influencing the whole group action time of the safety and stability control system) is not distinguished, and the adopted control measures are the same, so that the following two problems may exist: if the fault judgment time exceeds the time expected by the control strategy, an under-control risk exists, and the accident is possibly led to be enlarged; and secondly, if the fault judgment time is shorter than the expected time, the control measures are probably larger, and further optimization can be carried out.
Disclosure of Invention
The invention aims to provide a multi-principle timing sequence fault identification and control method and device in a stability control system.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the embodiment of the invention provides a multi-principle time division sequence fault identification and control method in a stability control system, which comprises the following steps:
after the elements enter a starting state, selecting a fault tripping criterion according to the electrical quantity characteristics of each element to judge a fault, and recording fault elements, fault judging time and current amplitude at the fault judging moment;
according to the sudden change starting time, the sudden change starting current amplitude, the fault judging time, the current amplitude and the steady-state current amplitude at the fault judging time, and the fault occurrence time is reversely deduced;
calculating fault discrimination time according to the fault occurrence time;
and determining a fault control measure according to the current working condition, the fault element and the fault judging time.
Further, the method also comprises the step of judging that the element enters the starting state:
collecting three-phase voltage and current of each element, protecting action signals and calculating the amplitude and power of the steady-state current;
judging whether electric quantity sudden change starting exists according to the calculated steady-state current amplitude or power, determining a sudden change starting element, and recording the sudden change starting time and the current amplitude during starting of the element;
after the sudden change of the elements is determined to be started, all the elements enter a starting state.
Further, the selecting a fault trip criterion according to the electrical quantity characteristics of each element to judge the fault includes:
calculating and judging whether the electrical quantity characteristics of each element meet the following conditions:
a. phase of any phase
And any phase current non-periodic component Iap＞Iap_set1And current power
Wherein, ItAs the current at the present time, the current,
for a current of 200ms before start-up, Iset1For high current threshold setting, IapAs non-periodic component of the present current, Iap_set1The threshold is fixed for the non-periodic component of the current,
for 200ms power before start-up, PsetSetting a power value before an accident;
b. phase of any phase
And any phase current non-periodic component Iap＞Iap_set2And current power
Wherein, Iset2For low current threshold setting, Iap_set2A low threshold value is set for the non-periodic component of the current;
c. a protection action signal is received within the time T,
wherein T is a time constant value, and timing is started after the mutation amount is started;
if the condition a is met, judging the fault by using a pure electric quantity fault tripping criterion; otherwise, entering a condition b, and if the condition b is not met, judging the fault by using a backup trip criterion; otherwise, entering a condition c, and if the condition c is not met, judging the fault by using a backup trip criterion; otherwise, the fault is judged by using a fault tripping criterion combined with the protection signal.
Further, the high current threshold constant value is 200-300A;
the fixed value of the current non-periodic component high threshold is 40-50% In;
the low current threshold constant value is 100A;
and the low threshold fixed value of the non-periodic component of the current is 20-40% In.
Further, the back-stepping fault occurrence time includes:
tg＝t0-(Iq-Iw)*(t1-t0)/(Id-Iq)，
wherein, tgTime of occurrence of a failure, t0To the moment of onset of the mutation, IqFor sudden change of starting current amplitude, t1For the fault determination of the time, IdThe current amplitude at the time of fault determination, IwIs the steady state current amplitude.
Further, the calculating the fault determination time according to the fault occurrence time includes:
t＝t1-tg＝t1-t0+(Iq-Iw)*(t1-t0)/(Id-Iq)，
where t is the fault discrimination time.
Further, the determining a fault control measure according to the current working condition, the fault element and the fault judgment time includes:
and determining the fault control measures by means of table lookup.
Further, the method also comprises the following steps: establishing an offline fault strategy table and an online fault strategy table;
the offline fault policy table includes: the fault control method comprises the following steps of (1) a fault element, fault judgment time of the fault element, a detection section corresponding to the fault element, and a fault control measure for detecting section current corresponding to the section in the fault judgment time;
the online fault policy table includes: the fault control device comprises a fault element, a fault judging time of the fault element and a fault control measure corresponding to the fault judging time.
In another aspect, an embodiment of the present invention further provides a multi-principle timing sequence fault recognition and control apparatus in a stability control system, including:
the fault judging module is used for selecting a fault tripping criterion according to the electrical quantity characteristics of each element to judge a fault after the elements enter a starting state, and recording fault elements, fault judging time and current amplitude at the fault judging time;
the first calculation module is used for reversely deducing the fault occurrence time according to the sudden change starting time, the sudden change starting current amplitude, the fault judgment time, the current amplitude and the steady-state current amplitude at the fault judgment time;
the second calculation module is used for calculating the fault judgment time according to the fault occurrence time;
and the determining module is used for determining a fault control measure according to the current working condition, the fault element and the fault judging time.
Further, the fault determination module is specifically configured to,
calculating and judging whether the electrical quantity characteristics of each element meet the following conditions in real time:
a. phase of any phase
And any phase current non-periodic component Iap＞Iap_set1And current power
Wherein, ItAs the current at the present time, the current,
for a current of 200ms before start-up, Iset1For high current threshold setting, IapAs non-periodic component of the present current, Iap_set1The threshold is fixed for the non-periodic component of the current,
for 200ms power before start-up, PsetSetting a power value before an accident;
b. phase of any phase
And any phase current non-periodic component Iap＞Iap_set2And current power
Wherein, Iset2For low current threshold setting, Iap_set2A low threshold value is set for the non-periodic component of the current;
c. a protection action signal is received within the time T,
wherein T is a time constant value, and timing is started after the mutation amount is started;
if the condition a is met, judging the fault by using a pure electric quantity fault tripping criterion; otherwise, entering a condition b, and if the condition b is not met, judging the fault by using a backup trip criterion; otherwise, entering a condition c, and if the condition c is not met, judging the fault by using a backup trip criterion; otherwise, the fault is judged by using a fault tripping criterion combined with the protection signal.
Further, the first calculation module is specifically configured to,
calculating the occurrence time of the reverse fault:
tg＝t0-(Iq-Iw)*(t1-t0)/(Id-Iq)，
wherein, tgTime of occurrence of a failure, t0To the moment of onset of the mutation, IqFor sudden change of starting current amplitude, t1For the fault determination of the time, IdThe current amplitude at the time of fault determination, IwIs the steady state current amplitude.
Further, the second calculation module is specifically configured to,
t＝t1-tg＝t1-t0+(Iq-Iw)*(t1-t0)/(Id-Iq)，
where t is the fault discrimination time.
The beneficial effects of the invention are as follows:
the embodiment of the invention provides a multi-principle timing sequence fault identification and control method for a safety and stability control system, which adopts three fault identification levels, effectively solves the problem that the fault identification of the current stability control system depends on a protection action signal and has high reliability;
meanwhile, the stability control device reversely deduces the real occurrence time of the fault according to the sudden change starting time and the fault judging time, so that different control measures are taken according to different fault judging times, the control method can be optimized, the practical value is achieved, the performance of a safety and stability control system is improved, and the safe and stable operation of a power grid is guaranteed.
Drawings
FIG. 1 is a flow chart of a multi-principle timing sequence fault identification and control method in the stability control system of the invention;
fig. 2 is a schematic diagram illustrating calculation of the fault discrimination time in the present invention.
Detailed Description
The invention is further described below. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
First, a typical safety and stability control strategy table as shown in tables 1 and 2 is prepared. Table 1 shows a policy table for offline decision, and table 2 shows a policy table for online decision. And the control measures corresponding to different fault judging time are different for the same fault in the strategy table.
Control measure Pcut_i＝F(ei,ti) Wherein e isiIs a unit ofFailure of element i, tiTime of determination for failure of element i, Pcut_iIs a control measure.
TABLE 1 offline Fault policies Table
TABLE 2 Online Fault policies Table
Referring to fig. 1, an embodiment of the present invention provides a multi-principle timing sequence fault identification and control method in a stability control system, including:
Step 2, calculating and judging whether the electrical quantity characteristics of all elements meet the following conditions in real time:
(1) phase of any phase
And any phase current non-periodic component Iap＞Iap_set1And current power
Wherein, ItAs the current at the present time, the current,
for a current of 200ms before start-up, Iset1The high current threshold is set, and is generally 200-300A; i isapAs non-periodic component of the present current, Iap_set1The non-periodic component of the current is a high threshold fixed value, and 40-50% In is generally selected;
for 200ms power before start-up, PsetAnd the power before the accident is fixed.
(2) Phase of any phase
And any phase current non-periodic component Iap＞Iap_set2And current power
Wherein, Iset2The value is a low current threshold fixed value, and is generally 100A; i isap_set2The current non-periodic component is a low threshold value, and 20-40% In is generally selected.
(3) The protection operation signal is received within the time T.
Wherein T is a fixed time value, and the time is counted from the start of the mutation amount.
If the condition (1) is met, judging the fault by using a pure electric quantity fault tripping criterion, otherwise, judging the conditions (2) and (3); if the conditions (2) and (3) are met, judging the fault by using a fault tripping criterion combined with the protection signal; and if the conditions (2) and (3) are not met simultaneously, judging whether the breaker trips or not by using a backup trip criterion.
And 3, continuously judging the fault after the pure electric quantity fault tripping criterion is combined with the fault tripping criterion of the protection signal or the backup tripping criterion, and recording a fault element e when the fault is judgediAnd the failure determination time t1Current amplitude I at the time of fault determinationd。
Step 4, starting time t according to the abrupt change quantity of the stability control device0Amplitude of abrupt starting current IqThe fault judgment time t of the stability control device1Current amplitude I at the time of fault determinationdSteady state current amplitude IwReverse thrust fault occurrence time tg。
Reverse thrust fault occurrence time tgIs shown in fig. 2:
calculating the fault occurrence time:
tg＝t0-(Iq-Iw)*(t1-t0)/(Id-Iq)
thereby, the failure determination time is obtained:
t＝t1-tg＝t1-t0+(Iq-Iw)*(t1-t0)/(Id-Iq)。
the fault judging time is the time difference from the fault occurrence time to the fault identification of the device; the failure determination time is a time at which the apparatus recognizes a failure.
Step 5, if the decision is off-line, according to the current working condition and the fault element eiAnd a fault judgment time t, searching an offline fault strategy table shown in the table 1, and determining a control measure; if the decision is on-line decision, an on-line fault strategy table shown in the table 2 is searched according to the fault element i and the fault judgment time t, and the control measure is determined.
The embodiment of the invention also provides a multi-principle timing sequence fault identification and control device in a stability control system, which comprises the following steps:
the fault judging module is used for selecting a fault tripping criterion according to the electrical quantity characteristics of each element to judge a fault after the elements enter a starting state, and recording fault elements, fault judging time and current amplitude at the fault judging time;
the first calculation module is used for reversely deducing the fault occurrence time according to the sudden change starting time, the sudden change starting current amplitude, the fault judgment time, the current amplitude and the steady-state current amplitude at the fault judgment time;
the second calculation module is used for calculating the fault judgment time according to the fault occurrence time;
and the determining module is used for determining a fault control measure according to the current working condition, the fault element and the fault judging time.
Further, the fault determination module is specifically configured to,
calculating and judging whether the electrical quantity characteristics of each element meet the following conditions in real time:
a. phase of any phase
And any phase current non-periodic component Iap＞Iap_set1And current power
Wherein, ItAs the current at the present time, the current,
for a current of 200ms before start-up, Iset1For high current threshold setting, IapAs non-periodic component of the present current, Iap_set1The threshold is fixed for the non-periodic component of the current,
for 200ms power before start-up, PsetSetting a power value before an accident;
b. phase of any phase
And any phase current non-periodic component Iap＞Iap_set2And current power
Wherein, Iset2For low current threshold setting, Iap_set2A low threshold value is set for the non-periodic component of the current;
c. a protection action signal is received within the time T,
wherein T is a time constant value, and timing is started after the mutation amount is started;
if the condition a is met, judging the fault by using a pure electric quantity fault tripping criterion; otherwise, entering a condition b, and if the condition b is not met, judging the fault by using a backup trip criterion; otherwise, entering a condition c, and if the condition c is not met, judging the fault by using a backup trip criterion; otherwise, the fault is judged by using a fault tripping criterion combined with the protection signal.
Further, the first calculation module is specifically configured to,
calculating the occurrence time of the reverse fault:
tg＝t0-(Iq-Iw)*(t1-t0)/(Id-Iq)，
wherein, tgTime of occurrence of a failure, t0To the moment of onset of the mutation, IqFor sudden change of starting current amplitude, t1For the fault determination of the time, IdThe current amplitude at the time of fault determination, IwIs the steady state current amplitude.
Further, the second calculation module is specifically configured to,
t＝t1-tg＝t1-t0+(Iq-Iw)*(t1-t0)/(Id-Iq)，
where t is the fault discrimination time.
It is to be noted that the apparatus embodiment corresponds to the method embodiment, and the implementation manners of the method embodiment are all applicable to the apparatus embodiment and can achieve the same or similar technical effects, so that the details are not described herein.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (12)
1. A multi-principle time division sequence fault identification and control method in a stability control system is characterized by comprising the following steps:
after the elements enter a starting state, selecting a fault tripping criterion according to the electrical quantity characteristics of each element to judge a fault, and recording fault elements, fault judging time and current amplitude at the fault judging moment;
according to the sudden change starting time, the sudden change starting current amplitude, the fault judging time, the current amplitude and the steady-state current amplitude at the fault judging time, and the fault occurrence time is reversely deduced;
calculating fault discrimination time according to the fault occurrence time;
and determining a fault control measure according to the current working condition, the fault element and the fault judging time.
2. The multi-principle timing sequence fault identification and control method in the stability control system according to claim 1, further comprising the step of judging that the element enters a start-up state:
collecting three-phase voltage and current of each element, protecting action signals and calculating the amplitude and power of the steady-state current;
judging whether electric quantity sudden change starting exists according to the calculated steady-state current amplitude or power, determining a sudden change starting element, and recording the sudden change starting time and the current amplitude during starting of the element;
after the sudden change of the elements is determined to be started, all the elements enter a starting state.
3. The multi-principle timing sequence fault identification and control method in the stability control system according to claim 1, wherein the selecting a fault trip criterion to judge the fault according to the electrical quantity characteristics of each element comprises:
calculating and judging whether the electrical quantity characteristics of each element meet the following conditions:
a. phase of any phase
And any phase current non-periodic component Iap＞Iap_set1And 200ms power before starting
Wherein, ItAs the current at the present time, the current,
for a current of 200ms before start-up, Iset1For high current threshold setting, IapAs non-periodic component of the present current, Iap_set1The threshold is fixed for the non-periodic component of the current,
for 200ms power before start-up, PsetSetting a power value before an accident;
b. phase of any phase
And any phase current non-periodic component Iap＞Iap_set2And 200ms power before starting
Wherein, Iset2For low current threshold setting, Iap_set2A low threshold value is set for the non-periodic component of the current;
c. a protection action signal is received within the time T,
wherein T is a time constant value, and timing is started after the mutation amount is started;
if the condition a is met, judging the fault by using a pure electric quantity fault tripping criterion; otherwise, entering a condition b, and if the condition b is not met, judging the fault by using a backup trip criterion; otherwise, entering a condition c, and if the condition c is not met, judging the fault by using a backup trip criterion; otherwise, the fault is judged by using a fault tripping criterion combined with the protection signal.
4. The multi-principle timing sequence fault identification and control method in the stability control system according to claim 3,
the high current threshold constant value is 200-300A;
the fixed value of the current non-periodic component high threshold is 40-50% In;
the low current threshold constant value is 100A;
and the low threshold fixed value of the non-periodic component of the current is 20-40% In.
5. The multi-principle timing sequence fault identification and control method in the stability control system according to claim 1, wherein the step of deducing the occurrence time of the fault comprises the following steps:
tg＝t0-(Iq-Iw)*(t1-t0)/(Id-Iq)，
wherein, tgTime of occurrence of a failure, t0To the moment of onset of the mutation, IqFor sudden change of starting current amplitude, t1For the fault determination of the time, IdThe current amplitude at the time of fault determination, IwIs the steady state current amplitude.
6. The method for identifying and controlling the multi-principle timing sequence fault in the stability control system according to claim 5, wherein the calculating the fault discrimination time according to the fault occurrence time comprises:
t＝t1-tg＝t1-t0+(Iq-Iw)*(t1-t0)/(Id-Iq)，
where t is the fault discrimination time.
7. The multi-principle timing sequence fault identification and control method in the stability control system according to claim 1,
the determining the fault control measures according to the current working condition, the fault element and the fault judging time comprises the following steps:
and determining the fault control measures by means of table lookup.
8. The multi-principle timing sequence fault identification and control method in the stability control system according to claim 7, further comprising: establishing an offline fault strategy table and an online fault strategy table;
the offline fault policy table includes: the fault control method comprises the following steps of (1) a fault element, fault judgment time of the fault element, a detection section corresponding to the fault element, and a fault control measure for detecting section current corresponding to the section in the fault judgment time;
the online fault policy table includes: the fault control device comprises a fault element, a fault judging time of the fault element and a fault control measure corresponding to the fault judging time.
9. The utility model provides a many principles divide sequential fault discernment and controlling means among stable control system which characterized in that includes:
the fault judging module is used for selecting a fault tripping criterion according to the electrical quantity characteristics of each element to judge a fault after the elements enter a starting state, and recording fault elements, fault judging time and current amplitude at the fault judging time;
the first calculation module is used for reversely deducing the fault occurrence time according to the sudden change starting time, the sudden change starting current amplitude, the fault judgment time, the current amplitude and the steady-state current amplitude at the fault judgment time;
the second calculation module is used for calculating the fault judgment time according to the fault occurrence time;
and the determining module is used for determining a fault control measure according to the current working condition, the fault element and the fault judging time.
10. The multi-principle timing sequence fault recognition and control device of a stability control system according to claim 9, wherein the fault determination module is specifically configured to,
calculating and judging whether the electrical quantity characteristics of each element meet the following conditions in real time:
a. phase of any phase
And any phase current non-periodic component Iap＞Iap_set1And 200ms power before starting
Wherein, ItAs the current at the present time, the current,
for a current of 200ms before start-up, Iset1For high current threshold setting, IapAs non-periodic component of the present current, Iap_set1The threshold is fixed for the non-periodic component of the current,
for 200ms power before start-up, PsetSetting a power value before an accident;
b. phase of any phase
And any phase current non-periodic component Iap＞Iap_set2And 200ms power before starting
Wherein, Iset2For low current threshold setting, Iap_set2A low threshold value is set for the non-periodic component of the current;
c. a protection action signal is received within the time T,
wherein T is a time constant value, and timing is started after the mutation amount is started;
if the condition a is met, judging the fault by using a pure electric quantity fault tripping criterion; otherwise, entering a condition b, and if the condition b is not met, judging the fault by using a backup trip criterion; otherwise, entering a condition c, and if the condition c is not met, judging the fault by using a backup trip criterion; otherwise, the fault is judged by using a fault tripping criterion combined with the protection signal.
11. The multi-principle timing sequence fault recognition and control device in a stability control system according to claim 9, wherein the first calculation module is specifically configured to,
calculating the occurrence time of the reverse fault:
tg＝t0-(Iq-Iw)*(t1-t0)/(Id-Iq)，
wherein, tgTime of occurrence of a failure, t0To the moment of onset of the mutation, IqFor sudden change of starting current amplitude, t1For the fault determination of the time, IdThe current amplitude at the time of fault determination, IwIs the steady state current amplitude.
12. The multi-principle timing sequence fault recognition and control device of a stability control system according to claim 11, wherein the second calculation module is specifically configured to,
t＝t1-tg＝t1-t0+(Iq-Iw)*(t1-t0)/(Id-Iq)，
where t is the fault discrimination time.
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| CN203504292U (en) * | 2013-09-23 | 2014-03-26 | 国家电网公司 | Power system protection device |
| CN108347039A (en) * | 2017-01-24 | 2018-07-31 | 中国电力科学研究院 | A kind of station domain back-up protection method and system based on jump-value of current |
| CN109787238A (en) * | 2019-01-30 | 2019-05-21 | 中国电力科学研究院有限公司 | For obtaining the method and system of data relevant to Load flow calculation after failure |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203504292U (en) * | 2013-09-23 | 2014-03-26 | 国家电网公司 | Power system protection device |
| CN108347039A (en) * | 2017-01-24 | 2018-07-31 | 中国电力科学研究院 | A kind of station domain back-up protection method and system based on jump-value of current |
| CN109787238A (en) * | 2019-01-30 | 2019-05-21 | 中国电力科学研究院有限公司 | For obtaining the method and system of data relevant to Load flow calculation after failure |
Non-Patent Citations (1)
| Title |
|---|
| 电网安全稳定控制装置线路故障跳闸判据的改进;董希建 等;《电力系统保护与控制》;20140506;第42卷(第11期);73-78 * |
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