CN112701664B - Method and system for reliably issuing short-circuit current control measures - Google Patents
Method and system for reliably issuing short-circuit current control measures Download PDFInfo
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Abstract
The invention discloses a method and a system for reliably issuing short-circuit current control measures, wherein the method comprises the following steps: obtain for the t0Short-circuit current control measures of the working condition of the power grid at any moment; for t0Generating a state characteristic vector S according to the switching and stopping states of key equipment under the operation condition of the power grid at any moment0Generating a power eigenvector F from the power of the critical device0(ii) a At the moment of issue t1Generating a state feature vector S at the time of issue1And power eigenvector F1Comparing the consistency of the state characteristic vector at the issuing moment with the initial state characteristic vector; reading the equipment switching-in and switching-out state corresponding to the measure in the SCADA before the control measure is issued; the initial state of the control measure is not issued, the control measure is issued through an issuing interface, and the return state is judged; reading the equipment shutdown state in the SCADA according to the successfully issued control measures, and confirming whether the corresponding equipment is shutdown; if all the control measure states are normal or abnormal, ending the control measure issuing.
Description
Technical Field
The invention relates to a method and a system for reliably issuing short-circuit current control measures, and belongs to the technical field of power systems and automation thereof.
Background
For the dispatching operation of the power grid, in order to ensure the safe and stable operation of the power grid, the short-circuit current level of the power grid needs to be closely concerned, and the exceeding risk of the short-circuit current of the power grid is timely discovered and mastered; meanwhile, when the short-circuit current is found to exceed the standard, control measures need to be taken timely, and the short-circuit current level of the power grid is reduced. However, at present, a power grid operator usually checks the short-circuit current of each point according to the maximum short-circuit current calculation principle according to an off-line arrangement operation mode, because the mode calculation cannot exhaust all the operation modes, the short-circuit current level of the power grid can not meet the requirements under the arrangement operation mode, and under some practical modes, the short-circuit current of a bus and a line close to the limit may exceed the rated breaking capacity of a circuit breaker, so that the scheduling operator also needs to know the real-time short-circuit current level of the power grid in time and find the short-circuit current risk point in the power grid in time. On the other hand, when the short-circuit current of the power grid exceeds the standard, the conventional online monitoring system can only provide early warning for the exceeding of the short-circuit current, cannot provide control decision measures for reducing the short-circuit current in time, and once an emergency occurs, a dispatcher needs to process the short-circuit current in a short time, so that more serious consequences can be caused if the processing measures are improper.
In order to effectively reduce the level of short-circuit current, enhance the safety margin and the power supply reliability of a power grid and effectively improve the safe and economic operation level of the power grid, the influence factors and the calculation standards of the short-circuit current of the power grid need to be researched, the intelligent decision of the short-circuit current is realized, the control measures for reducing the short-circuit current are given under the condition that the short-circuit current exceeds the standard, an execution control strategy is issued, corresponding switches are switched on and off, and the on-line closed-loop control of the short-circuit current is realized.
How to reliably issue the control measures to the execution device for action is the key to realize the online closed-loop control of the short-circuit current. Because the state of the power grid dynamically changes along with the time, and the short-circuit current calculation and the decision-making assistance calculation take a certain time, if the state of the power grid obviously changes within the period of time, the measure generated by calculation according to the old state is obviously not suitable for being applied to the power grid in the new state, so that the problem of the short-circuit current of the power grid cannot be solved, and the problem is also aggravated occasionally.
Disclosure of Invention
The invention aims to overcome the technical defects in the prior art, solve the technical requirement that whether the power grid state at the time of calculation is consistent with the power grid state at the time of issuing is checked, and corresponding control measures are issued only under the condition that the states are consistent, and provide a method and a system for reliably issuing short-circuit current control measures.
The invention specifically adopts the following technical scheme: a method for reliably issuing short-circuit current control measures comprises the following steps:
step SS 1: setting the running time of a power system started by analyzing the short-circuit current of the power grid as t0Get for t0Short-circuit current control measures of the working condition of the power grid at any moment;
step SS 2: for t0Generating a state characteristic vector S according to the switching-stopping state of the key equipment under the working condition of the power grid at any moment0Generating a power eigenvector F from the power of the critical device0；
Step SS 3: at the moment of issue t1Acquiring the operation condition of the power grid, and generating a state characteristic vector S at the issuing moment1And power eigenvector F1Comparing the consistency of the state characteristic vector at the time of issuing with the initial state characteristic vector, and if the state characteristic vector is not consistent, returning to the failure of issuing; if the distances between the power characteristic vector at the time of sending and the initial power characteristic vector are consistent, comparing whether the distance meets the requirement of allowable error, if so, turning to the step SS4, and if not, returning to the failure of sending;
step SS 4: reading the equipment commissioning state corresponding to the measure in the SCADA before the control measure is issued, and if the equipment corresponding to the control measure is shut down, not issuing the control measure;
step SS 5: the initial state of the control measure is not delivered, the control measure is delivered through a delivery interface, the return state is judged, if some control measures are failed to be delivered and the control measure result of a new calculation time is not detected, the failed control measure is delivered again, the step SS3 is returned, if the maximum retransmission times or the delivery failure is reached, the control measure is considered to be abnormally delivered, and if the control measure result of the new calculation time is detected, the step SS1 is returned;
step SS 6: reading the equipment commissioning state in the SCADA aiming at the control measures which are successfully issued, confirming whether the corresponding equipment is shut down, if the corresponding equipment is not shut down, considering that the control measures are issued abnormally, and if the corresponding equipment is shut down, considering that the control measures are issued normally;
step SS 7: if all the control measure states are normal or abnormal, ending the control measure issuing.
As a preferred embodiment, the short-circuit current control measure in step SS1 includes: the key units, lines, transformers and load devices and the influence factors of the devices.
As a preferred embodiment, the method for generating the state feature vector includes:
step A1: the method comprises the following steps of setting N key devices operated in a power grid, wherein the N key devices comprise N1 units GN, N2 lines LN, N3 transformers TR and N4 loads LD;
step A2: acquiring the switching state of key equipment from the power grid operation data;
step A3: form a1 xn dimensional state feature vector:
S＝[GN1，...,GNn1,LN1,...,LNn2,TR1,...TRn3,LD1,...LDn4]，
wherein N1+ N2+ N3+ N4 is N.
As a preferred embodiment, the method for generating the power feature vector includes:
step B1: setting M key devices operated in a power grid, wherein the M key devices comprise M1 units GN, M2 lines LN, M3 transformers TR and M4 loads LD;
step B2: obtaining an active value of key equipment from power grid operation data;
step B3: form a1 × M dimensional state feature vector:
F＝[GN1，...,GNm1,LN1,...,LNm2,TR1,...TRm3,LD1,...LDm4]
wherein M1+ M2+ M3+ M4 is M.
As a preferred embodiment, step SS3 specifically includes:
step C1: according to the state eigenvector generation method and the power eigenvector generation method, the initial moment state eigenvector S is generated according to the initial moment power grid operation mode0And initial time power feature vector F0(ii) a Generating a state characteristic vector S at the issuing moment aiming at the power grid operation mode at the issuing moment1And a power feature vector F at the time of delivery1；
Step C2: judging the state characteristic vector S at the sending time1And initial time state feature vector S0Whether or not they are identical, i.e. s0(i)＝s1(i)If the i is consistent with the N, the system goes to SS4, and if the i is not consistent with the N, the system returns to failure of delivery;
step C3: calculating a power characteristic vector F at a sending moment1And initial time power feature vector F0Weighted Euclidean distance, if
Wherein ε is a threshold value, λiAnd if the characteristic influence factor is adopted, the measure can be issued, otherwise, the issuing failure is returned.
The invention also provides a system for reliably issuing the short-circuit current control measure, which comprises the following steps:
a measure acquisition module to perform: the operation time of the power system started by analyzing the short-circuit current of the power grid is t0Get for t0Short-circuit current control measures of the working condition of the power grid at any moment;
a feature vector generation module to perform: for t0Generating a state characteristic vector S according to the switching and stopping states of key equipment under the operation condition of the power grid at any moment0Generating a power eigenvector F from the power of the critical device0；
A vector consistency discrimination module for performing: at the moment of issue t1Acquiring the operation condition of the power grid, and generating a state characteristic vector S at the issuing moment1And power eigenvector F1Comparing the consistency of the state characteristic vector at the time of issuing with the initial state characteristic vector, and if the state characteristic vector is not consistent, returning to the failure of issuing; if the distance between the power characteristic vector at the time of delivery and the initial power characteristic vector is consistent, comparing whether the distance meets the requirement of allowable error, if so, turning to a step SS4, and if not, returning failure of delivery;
an initial commissioning reading module to perform: reading the equipment shutdown state corresponding to the control measure in the SCADA before the control measure is issued, and if the equipment corresponding to the control measure is shutdown, not issuing the control measure;
a return state identification module for performing: the initial state of the control measure is not delivered, the control measure is delivered through a delivery interface, the return state is judged, if some control measures are failed to be delivered and the control measure result of a new calculation time is not detected, the failed control measure is delivered again, the step SS3 is returned, if the maximum retransmission times or the delivery failure is reached, the control measure is considered to be abnormally delivered, and if the control measure result of the new calculation time is detected, the step SS1 is returned;
an operation commissioning reading module for performing: reading the equipment commissioning state in the SCADA aiming at the control measures which are successfully issued, confirming whether the corresponding equipment is shut down, if the corresponding equipment is not shut down, considering that the control measures are issued abnormally, and if the corresponding equipment is shut down, considering that the control measures are issued normally;
a terminal module for performing: if all the control measure states are normal or abnormal, ending the control measure issuing.
As a preferred embodiment, the short-circuit current control measure includes: the key units, lines, transformers and load devices and the influence factors of the devices.
As a preferred embodiment, the method for generating the state feature vector includes:
step A1: the method comprises the following steps of setting N key devices operated in a power grid, wherein the N key devices comprise N1 units GN, N2 lines LN, N3 transformers TR and N4 loads LD;
step A2: acquiring the switching state of key equipment from the power grid operation data;
step A3: form a1 xn dimensional state feature vector:
S＝[GN1，...,GNn1,LN1,...,LNn2,TR1,...TRn3,LD1,...LDn4]，
wherein N1+ N2+ N3+ N4 is N.
As a preferred embodiment, the method for generating the power feature vector includes:
step B1: setting M key devices operated in a power grid, wherein the M key devices comprise M1 machine groups GN, M2 lines LN, M3 transformers TR and M4 loads LD;
step B2: obtaining an active value of key equipment from power grid operation data;
step B3: form a1 × M dimensional state feature vector:
F＝[GN1，...,GNm1,LN1,...,LNm2,TR1,...TRm3,LD1,...LDm4]
wherein M1+ M2+ M3+ M4 is M.
As a preferred embodiment, the vector consistency determination module specifically includes:
step C1: according to the state eigenvector generation method and the power eigenvector generation method, the initial moment state eigenvector S is generated according to the initial moment power grid operation mode0And initial time power feature vector F0(ii) a Generating a state characteristic vector S at the issuing moment aiming at the power grid operation mode at the issuing moment1And a power feature vector F at the time of delivery1；
Step C2: judging the state characteristic vector S at the sending time1And initial time state feature vector S0Whether or not they are identical, i.e. s0(i)＝s1(i)If the i is consistent with the N, the system goes to SS4, and if the i is not consistent with the N, the system returns to failure of delivery;
step C3: calculating a power characteristic vector F at a sending moment1And initial time power feature vector F0Weighted Euclidean distance, if
Wherein ε is a threshold value, λiAnd if the characteristic influence factor is adopted, the measure can be issued, otherwise, the issuing failure is returned.
The invention has the following beneficial effects: the invention designs a method for verifying whether the state of the power grid at the calculating moment is consistent with the state of the power grid at the issuing moment, only under the condition that the states are considered to be consistent, corresponding control measures are issued, and the dispatching automation level of the point network for the short-circuit current problem is obviously improved through reliable issuing of the short-circuit current measures, so that the pressure of dispatching operation personnel is reduced, and the safety and economic operation level of the power grid is effectively improved.
Drawings
Fig. 1 is a flowchart of a method for reliably issuing a short-circuit current control measure according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. 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.
Example 1: as shown in fig. 1, the present invention provides a method for reliably issuing a short-circuit current control measure, which includes the following steps.
1) Aiming at an initial power grid, obtaining control measures: SET (t)0) Cutting unit a, cutting unit B, cutting load a. The current power grid characteristics are acquired as a unit 1, a unit 2, a unit 3, a unit 4, a unit 5, a line 1, a line 2, a line 3, a line 4, a line 5, a transformer 1, a transformer 2, a transformer 3, a transformer 4, a transformer 5, a load 1, a load 2, a load 3, a load 4 and a load 5. A power measuring point is appointed to a line, and the transformer obtains power of a high-voltage side. The state characteristic vector is a set of the switching and stopping states of all the characteristic equipment, and the power characteristic vector is a set of active values of all the characteristic equipment. And setting the allowable error distance threshold value epsilon to 20, wherein the influence factor of each key device is 1.
2) Setting the running time of a power system started by analyzing the short-circuit current of the power grid as t0. Reading t0Generating a state characteristic vector S according to the switching-on/off state of the key equipment under the power grid operation condition01,1,1,0,1,1,1,0,1,1,1,1,1,1, 1}, with 1 indicating commissioning and 0 indicating outage. Generating a power eigenvector F from the power of a critical device0＝{233，257，281，0，318，309，297, 0, 334, 267, 284, 295, 296, 308, 303, 121, 125, 140, 138, 155}, in MW.
3) At the moment of issue t1Acquiring the operation condition of the power grid, and generating a state characteristic vector S at the issuing moment11,1,1,0,1,1,1,0,1,1,1,1,1,1, 1} and a power feature vector F1＝{232，255，283，0，310，305，296，0，336，265，280，298，295，304，309，120，123，141，135，159}；
A1. And judging whether the state characteristic vector at the issuing time is consistent with the initial state characteristic vector.
Due to S0＝S1And the state characteristic vector at the issuing time is consistent with the initial state characteristic vector, and the step A2 is carried out.
A2. Calculating the distance between the power characteristic vector at the issuing moment and the initial power characteristic vector
And (4) enabling the distance between the power characteristic vector at the issuing moment and the initial power characteristic vector to meet the requirement of allowable error, and turning to 4).
4) SET of measures SET (t)0) Reading equipment commissioning states corresponding to the measures in the SCADA in sequence before all measures are issued, wherein the unit A, the unit B and the load A are turned to be in commissioning state 5);
5) issuing control measures SET (t) through issuing interface0) Judging SET (t)0) Returning the state of each measure, if the measure issuing of the unit A of the switching unit fails and the measure result of the new calculation time is not detected, retransmitting the failed measure (the maximum retransmission time is 3), returning to the step 3, and successfully executing the measure after retransmission;
6) measures for successful delivery SET (t)0) Reading the shutdown state of corresponding control equipment (unit A, unit B and load A) in the SCADA, confirming whether the corresponding equipment is shutdown or not, if the unit A is not shutdown, considering that the measure is issued abnormally, and if the unit B and the load A are shutdown, considering that the measure is issued normally;
7) and all control measure states are normal or abnormal, and the measure issuing is finished.
Optionally, the short-circuit current control measure in step SS1 includes: the key units, lines, transformers and load devices and the influence factors of the devices.
Optionally, the method for generating the state feature vector includes:
step A1: the method comprises the following steps of setting N key devices operated in a power grid, wherein the N key devices comprise N1 units GN, N2 lines LN, N3 transformers TR and N4 loads LD;
step A2: acquiring the switching state of key equipment from the power grid operation data;
step A3: form a1 xn dimensional state feature vector:
S＝[GN1，...,GNn1,LN1,...,LNn2,TR1,...TRn3,LD1,...LDn4]，
wherein N1+ N2+ N3+ N4 is N.
Optionally, the method for generating the power feature vector includes:
step B1: setting M key devices operated in a power grid, wherein the M key devices comprise M1 units GN, M2 lines LN, M3 transformers TR and M4 loads LD;
step B2: obtaining an active value of key equipment from power grid operation data;
step B3: form a1 × M dimensional state feature vector:
F＝[GN1，...,GNm1,LN1,...,LNm2,TR1,...TRm3,LD1,...LDm4]
wherein M1+ M2+ M3+ M4 is M.
Optionally, step SS3 specifically includes:
step C1: according to the state eigenvector generation method and the power eigenvector generation method, the initial moment state eigenvector S is generated according to the initial moment power grid operation mode0And initial time power feature vector F0(ii) a Generating a state characteristic vector S at the issuing time aiming at the power grid operation mode at the issuing time1And a power characteristic vector F at the sending time1；
Step C2: judging the state characteristic vector S at the sending time1And initial time state feature vector S0Whether or not they are identical, i.e. s0(i)＝s1(i)If the i is consistent with the N, the system goes to SS4, and if the i is not consistent with the N, the system returns to failure of delivery;
step C3: calculating a power characteristic vector F at a sending moment1And initial time power feature vector F0Weighted Euclidean distance, if
Wherein ε is a threshold value, λiAnd if the characteristic influence factor is adopted, the measure can be issued, otherwise, the issuing failure is returned.
Example 2: the other conditions are the same as in example 1, and the allowable error distance threshold value ∈ is set to 10.
At this time, the distance between the power characteristic vector and the initial power characteristic vector at the issuing moment does not meet the requirement of allowable error, and the issuing failure is returned when the step 3) is carried out, and the step 4) is not executed.
Example 3: the invention also provides a system for reliably issuing the short-circuit current control measure, which comprises the following steps:
a measure acquisition module to perform: the operation time of the power system started by analyzing the short-circuit current of the power grid is t0Get for t0Short-circuit current control measures of the working condition of the power grid at any moment;
a feature vector generation module to perform: for t0Generating a state characteristic vector S according to the switching and stopping states of key equipment under the operation condition of the power grid at any moment0Generating a power eigenvector F from the power of the critical device0；
A vector consistency discrimination module for performing: at the next moment t1Acquiring the operation condition of the power grid, and generating a state characteristic vector S at the issuing moment1And power eigenvector F1Comparing the consistency of the state characteristic vector at the time of issuing with the initial state characteristic vector, and if the state characteristic vector is not consistent, returning to failure of issuing; if the two are consistent, the distance between the power characteristic vector at the time of sending down and the initial power characteristic vector is comparedJudging whether the distance meets the requirement of the allowable error, if so, turning to the step SS4, and if not, returning to failure of issuing;
an initial commissioning reading module to perform: reading the equipment commissioning state corresponding to the control measure in the SCADA before the control measure is issued, and if the equipment corresponding to the control measure is shut down, not issuing the control measure;
a return state identification module for performing: the initial state of the control measure is not delivered, the control measure is delivered through a delivery interface, the return state is judged, if some control measures are failed to be delivered and the control measure result of a new calculation time is not detected, the failed control measure is delivered again, the step SS3 is returned, if the maximum retransmission times or the delivery failure is reached, the control measure is considered to be abnormally delivered, and if the control measure result of the new calculation time is detected, the step SS1 is returned;
an operation commissioning reading module for performing: reading the equipment commissioning state in the SCADA aiming at the control measures which are successfully issued, confirming whether the corresponding equipment is shut down, if the corresponding equipment is not shut down, considering that the control measures are issued abnormally, and if the corresponding equipment is shut down, considering that the control measures are issued normally;
a terminal module for performing: if all the control measure states are normal or abnormal, ending the control measure issuing.
As a preferred embodiment, the short-circuit current control measure includes: the key units, lines, transformers and load devices and the influence factors of the devices.
As a preferred embodiment, the method for generating the state feature vector includes:
step A1: the method comprises the following steps of setting N key devices operated in a power grid, wherein the N key devices comprise N1 units GN, N2 lines LN, N3 transformers TR and N4 loads LD;
step A2: acquiring the switching state of key equipment from the power grid operation data;
step A3: form a1 xn dimensional state feature vector:
S＝[GN1，...,GNn1,LN1,...,LNn2,TR1,...TRn3,LD1,...LDn4]，
wherein N1+ N2+ N3+ N4 is N.
As a preferred embodiment, the method for generating the power feature vector includes:
step B1: setting M key devices operated in a power grid, wherein the M key devices comprise M1 machine groups GN, M2 lines LN, M3 transformers TR and M4 loads LD;
step B2: obtaining an active value of key equipment from power grid operation data;
step B3: form a1 × M dimensional state feature vector:
F＝[GN1，...,GNm1,LN1,...,LNm2,TR1,...TRm3,LD1,...LDm4]
wherein M1+ M2+ M3+ M4 is M.
As a preferred embodiment, the vector consistency determination module specifically includes:
step C1: according to the state eigenvector generation method and the power eigenvector generation method, the initial moment state eigenvector S is generated according to the initial moment power grid operation mode0And initial time power feature vector F0(ii) a Generating a state characteristic vector S at the issuing moment aiming at the power grid operation mode at the issuing moment1And a power feature vector F at the time of delivery1；
Step C2: judging the state characteristic vector S at the sending time1And initial time state feature vector S0Whether or not they are identical, i.e. s0(i)＝s1(i)If the i is consistent with the N, the system goes to SS4, and if the i is not consistent with the N, the system returns to failure of delivery;
step C3: calculating a power characteristic vector F at a sending moment1And initial time power feature vector F0Weighted Euclidean distance, if
Wherein ε is a threshold value, λiIs an influence factor of the feature, thenAnd considering the measures to be capable of being issued, and otherwise, returning to failure of issuing.
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 (10)
1. A method for reliably issuing short-circuit current control measures is characterized by comprising the following steps:
step SS 1: the operation time of the power system started by analyzing the short-circuit current of the power grid is t0Get for t0Short-circuit current control measures of the working condition of the power grid at any moment;
step SS 2: for t0Generating a state characteristic vector S according to the switching and stopping states of key equipment under the operation condition of the power grid at any moment0Generating a power eigenvector F from the power of the critical device0；
Step SS 3: at the moment of issue t1Acquiring the operation condition of the power grid, and generating a state characteristic vector S at the issuing moment1And power eigenvector F1Comparing the consistency of the state characteristic vector at the time of issuing with the initial state characteristic vector, and if the state characteristic vector is not consistent, returning to the failure of issuing; if the distances between the power characteristic vector at the time of sending and the initial power characteristic vector are consistent, comparing whether the distance meets the requirement of allowable error, if so, turning to the step SS4, and if not, returning to the failure of sending;
step SS 4: reading the equipment commissioning state corresponding to the measure in the SCADA before the control measure is issued, and if the equipment corresponding to the control measure is shut down, not issuing the control measure;
step SS 5: the initial state of the control measure is not delivered, the control measure is delivered through a delivery interface, the return state is judged, if some control measures are failed to be delivered and the control measure result of a new calculation time is not detected, the failed control measure is delivered again, the step SS3 is returned, if the maximum retransmission times or the delivery failure is reached, the control measure is considered to be abnormally delivered, and if the control measure result of the new calculation time is detected, the step SS1 is returned;
step SS 6: reading the equipment commissioning state in the SCADA and confirming whether the corresponding equipment is shut down or not aiming at the control measures which are successfully issued, if not, considering that the control measures are issued abnormally, and if the equipment is shut down, considering that the control measures are issued normally;
step SS 7: if all the control measure states are normal or abnormal, ending the control measure issuing.
2. The method as claimed in claim 1, wherein the short-circuit current control measure of step SS1 includes: the key units, lines, transformers and load devices and the influence factors of the devices.
3. The method according to claim 1, wherein the method for generating the state eigenvector comprises:
step A1: the method comprises the following steps of setting N key devices operated in a power grid, wherein the N key devices comprise N1 units GN, N2 lines LN, N3 transformers TR and N4 loads LD;
step A2: acquiring the switching state of key equipment from the power grid operation data;
step A3: form a1 xn dimensional state feature vector:
S＝[GN1，...,GNn1,LN1,...,LNn2,TR1,...TRn3,LD1,...LDn4]，
wherein N1+ N2+ N3+ N4 is N.
4. The method according to claim 1, wherein the method for generating the power eigenvector comprises:
step B1: setting M key devices operated in a power grid, wherein the M key devices comprise M1 machine groups GN, M2 lines LN, M3 transformers TR and M4 loads LD;
step B2: obtaining an active value of key equipment from power grid operation data;
step B3: form a1 × M dimensional state feature vector:
F＝[GN1，...,GNm1,LN1,...,LNm2,TR1,...TRm3,LD1,...LDm4]
wherein M1+ M2+ M3+ M4 is M.
5. The method for reliably issuing the short-circuit current control measure according to claim 1, wherein the step SS3 specifically includes:
step C1: according to the state eigenvector generation method and the power eigenvector generation method, the initial moment state eigenvector S is generated according to the initial moment power grid operation mode0And initial time power feature vector F0(ii) a Generating a state characteristic vector S at the issuing moment aiming at the power grid operation mode at the issuing moment1And a power characteristic vector F at the sending time1；
Step C2: judging the state characteristic vector S at the sending time1And initial time state feature vector S0Whether or not they are identical, i.e. s0(i)＝s1(i)If the i is consistent with the N, the system goes to SS4, and if the i is not consistent with the N, the system returns to failure of delivery;
step C3: calculating a power characteristic vector F at a sending moment1And initial time power feature vector F0Weighted Euclidean distance, if
Wherein ε is a threshold value, λiAnd if the characteristic influence factor is adopted, the measure can be issued, otherwise, the issuing failure is returned.
6. A system for reliably issuing short-circuit current control measures is characterized by comprising:
a measure acquisition module to perform: setting the running time of a power system started by analyzing the short-circuit current of the power grid as t0Get for t0A short-circuit current control measure of the working condition of the power grid at any moment;
a feature vector generation module to perform: for t0Generating a state characteristic vector S according to the switching and stopping states of key equipment under the operation condition of the power grid at any moment0Generating a power eigenvector F from the power of the critical device0；
A vector consistency discrimination module to perform: at the moment of issue t1Acquiring the operation condition of the power grid, and generating a state characteristic vector S at the issuing moment1Sum power feature vector F1Comparing the consistency of the state characteristic vector at the time of issuing with the initial state characteristic vector, and if the state characteristic vector is not consistent, returning to the failure of issuing; if the distances between the power characteristic vector at the time of sending and the initial power characteristic vector are consistent, comparing whether the distance meets the requirement of allowable error, if so, turning to the step SS4, and if not, returning to the failure of sending;
an initial commissioning reading module to perform: reading the equipment shutdown state corresponding to the control measure in the SCADA before the control measure is issued, and if the equipment corresponding to the control measure is shutdown, not issuing the control measure;
a return state identification module for performing: the initial state of the control measure is not delivered, the control measure is delivered through a delivery interface, the return state is judged, if some control measures are failed to be delivered and the control measure result of a new calculation time is not detected, the failed control measure is delivered again, the step SS3 is returned, if the maximum retransmission times or the delivery failure is reached, the control measure is considered to be abnormally delivered, and if the control measure result of the new calculation time is detected, the step SS1 is returned;
the operation switching and stopping reading module is used for executing: reading the equipment commissioning state in the SCADA aiming at the control measures which are successfully issued, confirming whether the corresponding equipment is shut down, if the corresponding equipment is not shut down, considering that the control measures are issued abnormally, and if the corresponding equipment is shut down, considering that the control measures are issued normally;
a terminal module to perform: if all the control measure states are normal or abnormal, ending the control measure issuing.
7. The system for reliably issuing the short-circuit current control measure according to claim 6, wherein the short-circuit current control measure comprises: the key units, lines, transformers, load equipment and the influence factors of each equipment.
8. The system according to claim 6, wherein the method for generating the state eigenvector comprises:
step A1: the method comprises the steps that N key devices run in a power grid and comprise N1 units GN, N2 lines LN, N3 transformers TR and N4 loads LD;
step A2: acquiring the switching-in and switching-off state of key equipment from power grid operation data;
step A3: form a1 xn dimensional state feature vector:
S＝[GN1，...,GNn1,LN1,...,LNn2,TR1,...TRn3,LD1,...LDn4]，
wherein N1+ N2+ N3+ N4 is N.
9. The system according to claim 6, wherein the method for generating the power eigenvector comprises:
step B1: setting M key devices operated in a power grid, wherein the M key devices comprise M1 machine groups GN, M2 lines LN, M3 transformers TR and M4 loads LD;
step B2: obtaining an active value of key equipment from power grid operation data;
step B3: form a1 × M dimensional state feature vector:
F＝[GN1，...,GNm1,LN1,...,LNm2,TR1,...TRm3,LD1,...LDm4]
wherein M1+ M2+ M3+ M4 ═ M.
10. The system according to claim 6, wherein the vector consistency determination module specifically comprises:
step C1: according to the state eigenvector generation method and the power eigenvector generation method, the initial moment state eigenvector S is generated according to the initial moment power grid operation mode0And initial time power feature vector F0(ii) a Generating a state characteristic vector S at the issuing time aiming at the power grid operation mode at the issuing time1And a power characteristic vector F at the sending time1；
Step C2: judging state characteristic vector S at issuing time1And initial time state feature vector S0Whether or not they are identical, i.e. s0(i)＝s1(i)If the i is consistent with the N, the system goes to SS4, and if the i is not consistent with the N, the system returns to failure of delivery;
step C3: calculating a power characteristic vector F at a sending moment1And initial time power feature vector F0Weighted Euclidean distance, if
Wherein ε is a threshold value, λiAnd if the characteristic influence factor is adopted, the measure can be issued, otherwise, the issuing failure is returned.
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| CN111900724A (en) * | 2020-07-14 | 2020-11-06 | 国电南瑞科技股份有限公司 | Online decision-making method, device and storage medium for transient stability emergency control of power system |
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| CN111900724A (en) * | 2020-07-14 | 2020-11-06 | 国电南瑞科技股份有限公司 | Online decision-making method, device and storage medium for transient stability emergency control of power system |
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