CN111817293A - Cascading failure blocking technology for coordinating safety and economy - Google Patents

Cascading failure blocking technology for coordinating safety and economy Download PDF

Info

Publication number
CN111817293A
CN111817293A CN202010640361.8A CN202010640361A CN111817293A CN 111817293 A CN111817293 A CN 111817293A CN 202010640361 A CN202010640361 A CN 202010640361A CN 111817293 A CN111817293 A CN 111817293A
Authority
CN
China
Prior art keywords
control
cascading failure
failure
cascading
risk
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010640361.8A
Other languages
Chinese (zh)
Inventor
田文辉
邢勐
吴肇赟
葛贤军
王爱科
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Huisi Huineng Technology Co Ltd
Original Assignee
Beijing Huisi Huineng Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Huisi Huineng Technology Co Ltd filed Critical Beijing Huisi Huineng Technology Co Ltd
Priority to CN202010640361.8A priority Critical patent/CN111817293A/en
Publication of CN111817293A publication Critical patent/CN111817293A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention relates to a cascading failure blocking technology with coordinated safety and economy. The correction control is implemented before the fault occurs, the emergency control is implemented after the fault occurs, and the correction control and the emergency control are complementary; the method is characterized in that: establishing a cascading failure coordination control model; s1, economic index and risk index; s2: a coordinated control model. According to the cascading failure blocking technology with coordinated safety and economy, a coordination control scheme which gives consideration to both safety and economy is obtained through an optimization model, so that the occurrence probability of cascading failures is reduced, and the risk of an accident chain set is reduced.

Description

Cascading failure blocking technology for coordinating safety and economy
Technical Field
The invention relates to a cascading failure blocking technology with coordinated safety and economy. Belongs to the technical field of electric power.
Background
The power industry is the most important basic energy industry in national economic development, is the basic industry related to the national estimated demon, and plays an important role in promoting the development of national economy and social progress. The electric power is not only a strategic problem related to national economic safety, but also closely related to the daily life and social stability of people.
With the continuous and rapid development of economic society, the electric power demand of China keeps rapidly increasing for a long time. At present, the grid of China forms a pattern of mutual supply of west electricity and east electricity and south and north electricity, and enters the period of cross-regional interconnection and ultra/extra-high voltage alternating current and direct current hybrid power transmission. Large-scale power cross-regional transmission brings huge economic benefits to the society, but simultaneously also brings serious challenges to the stable operation and control of a power grid.
With the advance of large-scale networking, the influence range of cascading failures is further expanded, and the risk of large-area power failure caused by local failures is greatly increased. Especially, in the transition stage of the grid structure from weak to strong, the influence of external disasters, the instability of the grid structure, the existence of a large number of electromagnetic ring networks and the fluctuation caused by new energy access increase the potential cascading failure probability in the global range, and the spread range and the caused loss are more serious, so that the risk of cascading failure is higher. Meanwhile, the huge and complex grid structure also increases the difficulty of analyzing and preventing cascading failures, and if the grid cascading failures cannot be controlled in time, the major power failure accidents caused by the grid cascading failures will greatly affect social economy, people's life and national stability. The deepening research of strengthening the cascading failure and the blocking method has important significance for promoting the large-area power failure defense technology and guaranteeing the safe and stable operation of the national power grid.
Disclosure of Invention
The invention aims to overcome the defects and provide a cascading failure blocking technology with coordinated safety and economy.
The purpose of the invention is realized as follows:
a kind of linkage fault blocking technology with safety and economy coordinated, the correction control is implemented before the fault occurs, the emergency control is implemented after the fault occurs, the correction control and the emergency control are complementary; the method is characterized in that: establishing a cascading failure coordination control model;
s1, economic index and risk index;
coordinated control of economic indicatorsCFor correcting the sum of control cost and probability weighted emergency control cost, blackout risk indicatorRDefining a system operation risk index for the risk sum of each cascading failure pathEAnd makeEThe sum of the economic index and the power failure risk index;
Figure DEST_PATH_IMAGE002AAAA
Figure DEST_PATH_IMAGE004AAAA
Figure DEST_PATH_IMAGE006AAAA
Figure DEST_PATH_IMAGE008AAAA
Figure DEST_PATH_IMAGE010AAAA
Figure DEST_PATH_IMAGE012AAAA
Figure DEST_PATH_IMAGE014AAAA
in the formula:C p in order to correct the control cost,C ek for cascading failure paths after correction controlL k The cost of the emergency control of (a),C e to sum the emergency control costs for each cascading failure path after corrective control,C e_avg weighting the sum of the emergency control costs for the probability of each cascading failure path after correction control;K G 、K L andKrespectively a generator set, a load set and a cascading failure path set;P Gi correcting the active power of the generator i before control;
Figure DEST_PATH_IMAGE016AAAA
correcting the active power of the generator i after control;
Figure DEST_PATH_IMAGE018AAAA
to address cascading failure pathsL k Emergency control rear generatoriActive power of (d);a i as a generatoriAdjusting the cost coefficient;
Figure DEST_PATH_IMAGE020AAAA
to address cascading failure pathsL k In emergency control of load nodeiThe load shedding amount of,MA load loss cost coefficient;p k_zd for cascading failure pathsL k The implementation probability of the middle-emergency control of (1);R Lk for cascading failure pathsiThe risk of (c);
s2: a coordinated control model;
the objective of the coordinated control model is to find a control scheme with the minimum operation risk under the condition of a given network topology and weather conditions, namely, the system power failure risk is reduced to the maximum extent at the minimum control cost, and the mathematical optimization model is as follows:
objective function
Figure DEST_PATH_IMAGE022AAAA
Constraint conditions
Figure DEST_PATH_IMAGE024AAAA
Figure DEST_PATH_IMAGE026AAAA
，k=1,...,u
Figure DEST_PATH_IMAGE028AAAAAA
Figure DEST_PATH_IMAGE030AAAA
，k=1,...,u
Figure DEST_PATH_IMAGE032AAAA
，k=1,...,u
Figure DEST_PATH_IMAGE034AAAA
Figure DEST_PATH_IMAGE036AAAA
，k=1,...,u
The constraint conditions comprise a first expression to a seventh expression, wherein the expressions are sequentially expressed in each of the first expression to the seventh expression, the power balance is kept after correction control, the power balance is kept after emergency control, the line power flow is not out of limit after correction control, the line power flow is not out of limit after emergency control, the load is not out of limit after emergency control, the output of the generator is not out of limit after correction control, and the output of the generator is not out of limit after emergency control;
wherein the content of the first and second substances,
Figure DEST_PATH_IMAGE038AAAA
controlling afterload nodes for correctioniThe active load of (2);
Figure DEST_PATH_IMAGE040AAAA
controlling the rear circuit for correctionijIn the flow of (2) to (2),
Figure DEST_PATH_IMAGE042AAAA
to address cascading failure pathsL k Emergency control rear line ofijIn the flow of (2) to (2),F ij,max as a lineijLimit values of the power flow;P Gi,min as a generatoriThe lower limit of the active power output is,P Gi,max as a generatoriThe upper limit of active power output.
Furthermore, the establishment of the coordinated control model of cascading failures includes the selection of the implementation position of the emergency control, the emergency control aims at a certain cascading failure path, because the importance degrees of different failure links in the same cascading failure path in the cascading failure path are different, the risk importance degree of the failure link is defined to represent the importance degree of the failure link in the same cascading failure path to the cascading failure path, and the expression is as follows:
Figure DEST_PATH_IMAGE044AAAA
in the formula (I), the compound is shown in the specification,R Lij for cascading failure pathsL i Front ofjThe power failure risk of each link is reduced,R i j(-1)for cascading failure pathsL i Front ofj-risk of blackout in 1 link,R Li for cascading failure pathsL i Risk of power outage.
Figure DEST_PATH_IMAGE046AAAAAAAA
The larger the value is, the fault link isT ij To cascading failure pathsL i The higher the importance of is, toL i The greater the impact of risk; in that
Figure DEST_PATH_IMAGE046AAAAAAAAA
And the failure link with the largest value adopts emergency control, so that the risk of a failure path can be effectively reduced, and the development of cascading failures is prevented.
Further, if only corrective control for all cascading failure paths is considered before failure, only the remaining ones areEIn (1)C p And removing the second, fourth, fifth and seventh expressions of the constraint condition, and converting the model into a pure correction control model.
Furthermore, if only the emergency control aiming at the fault path is taken into consideration in each cascading fault, only the emergency control aiming at the fault path is reservedEIn (1)C e_avg And removing the constraint conditions of the first formula, the third formula and the sixth formula, converting the model into pure emergency controlAnd (5) making a model.
Further, in the above-mentioned case,
Figure DEST_PATH_IMAGE028AAAAAAA
in the formula, the maximum load shedding amount of the load node is assumed to be 50% of the total load amount.
Compared with the prior art, the invention has the beneficial effects that:
according to the cascading failure blocking technology with coordinated safety and economy, a coordination control scheme which gives consideration to both safety and economy is obtained through an optimization model, so that the occurrence probability of cascading failures is reduced, and the risk of an accident chain set is reduced.
Drawings
FIG. 1 is a block diagram of blackout accidents, cascading failure sequences, and coordination control logic.
Detailed Description
The following description of the embodiments of the present invention will be made 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.
In order to realize the preventive blocking function of the cascading failure, the cascading failure defense research consists of three parts, namely wide-area data acquisition, online quantitative analysis and cascading failure preventive blocking.
Wide area data acquisition is the basis for cascading failure defense, and a good data acquisition system can truly reflect the actual operating conditions of the power system, the external environment, the self health condition of the electrical element and social factor information, so that the real-time working state of the element can be known.
On-line quantitative analysis is the core of cascading failure defense, the risk of component failure caused by internal and external factors of the power system is judged through collected wide area data, the risk of cascading failure of the power system under the current operation condition is predicted by combining a cascading failure propagation mechanism, a cascading failure event tree is generated, and an accident plan is formulated on the basis.
The preventive blocking of the cascading failure is the key of the cascading failure defense, real-time matching is carried out in the actual operation process of the power system according to the result of online quantitative analysis, and necessary preventive blocking measures are taken when the cascading failure risk is found, so that the purpose of blocking the cascading failure is achieved.
At present, the literature provides blackout prevention control based on multi-agent calculation, changes the original layered and partitioned calculation method, and performs distributed calculation by taking a power grid node as an agent. According to the technical scheme, a hierarchical partitioned MAS wide area system pre-control system with engineering practice significance is provided based on a 5-level power grid dispatching system in China, and the problem that faults in a region are developed into cascading faults due to the limitation of dispatching control can be effectively prevented. According to the method, on the basis of a sand pile model of cascading failures, a small stick mechanism is provided to destroy the structure of the sand pile and reduce the transmission amount of the failures through certain control measures, and finally, the bad influence on other parts after the regional power grid fails is avoided through an active splitting measure, so that the sand pile model is decomposed into a plurality of small sand pile models, and finally, the stability is recovered through respective evolution. There are also documents that apply the game idea to the prevention of cascading failures and propose a cascading failure playing defense model. In order to overcome the defects of the traditional emergency control and correction control measures, the literature provides the predictive emergency control based on fuzzy risk analysis, and constructs corresponding risk starting criteria to ensure the stability of the system after control and lower control cost. From different angles, the researches explore defense strategies for reducing the cascading failure risk and blocking the cascading failure propagation, can effectively prevent and relieve the occurrence of the blackout accident, and have certain reference value.
The invention relates to a cascading failure blocking technology for coordinating safety and economy.
The invention relates to a cascading failure blocking technology with coordinated safety and economy, which comprises the following steps:
establishing a cascading failure coordination control model;
s1: coordination of corrective control and emergency control;
according to the time sequence of the control measures, the control of the blackout accident can be divided into correction control before the accident and emergency control in the accident, and the logical relations of the blackout accident, the cascading failure sequence, the cascading failure links and the cascading failure coordination control are shown in fig. 1.
Major power failure accident and each interlocking fault pathL i The logic relationship of (A) is an OR gate, a cascading failure path and each failure linkT ij The logic relation of the logic relation is AND gate, the fault link triggering process of the same cascading fault path has directionality, and all triggering can cause cascading fault path triggering and blackout accidents. The correction control is implemented before the fault occurs, and the regulation object is the set of all cascading fault pathsLThe logic diagram is positioned before the initial fault link of each cascading fault path, so that the triggering of each cascading fault path is considered after the correction control is implemented; the emergency control is implemented after the fault occurs, and the regulation and control object is the current cascading fault pathL i And the logic diagram is positioned between fault links of the cascading fault paths, so that the emergency control is adopted after the triggering of the cascading fault paths.
Because the correction control is implemented before the triggering of the cascading failure paths, the correction control is acted at the moment of failure, so that the influence of the failure on the system can be fully reduced, but the correction control is oriented to all the failure paths, the risk of some failure paths is reduced, meanwhile, the risk of other failure paths can be increased, the requirements of different failure paths on the correction control can have contradiction, and therefore, the effect of reducing the power failure risk by only depending on the correction control is not necessarily ideal; the emergency control is implemented after the chain fault path is triggered, different fault paths correspond to different emergency controls, and the conflict problem can occur only when the fault path has an intersection point and the emergency control is implemented before the intersection point, so that the contradiction of the control measures is small, but the emergency control is implemented after the fault occurs, the fault has a large influence on the system, and the control quantity of the emergency control is often large. By adopting the correction control before the fault occurs, the emergency control amount required after the fault occurs can be reduced, and the control cost is reduced, while by adopting the emergency control after the fault occurs, the contradiction of the correction control can be relieved, and the capability of the control measures for reducing the overall risk of the system is improved, so that the correction control and the emergency control have strong complementarity.
S2, selecting the emergency control implementation position;
the emergency control aims at a certain cascading failure path, because the importance degrees of different failure links in the same cascading failure path in the cascading failure path are different, the risk importance degree of the failure link is defined to represent the importance degree of the failure link in the same cascading failure path to the cascading failure path, and the expression is as follows:
Figure DEST_PATH_IMAGE044AAAAA
 (1)
in the formula (I), the compound is shown in the specification,R Lij for cascading failure pathsL i Front ofjThe power failure risk of each link is reduced,R i j(-1)for cascading failure pathsL i Front ofj-risk of blackout in 1 link,R Li for cascading failure pathsL i Risk of power outage.
Figure DEST_PATH_IMAGE046AAAAAAAAAA
The larger the value is, the fault link isT ij To cascading failure pathsL i The higher the importance of is, toL i The greater the impact of risk. Thus, in
Figure DEST_PATH_IMAGE046AAAAAAAAAAA
And the failure link with the largest value adopts emergency control, so that the risk of a failure path can be effectively reduced, and the development of cascading failures is prevented.
S3, economic index and risk index;
coordinated control of economic indicatorsCThe sum of the emergency control costs is weighted for the corrective control costs and the probabilities. Power failure risk indicatorRIs the sum of the risks of each cascading failure path. Because the influence of the control measures on the power system is expressed in the form of the power failure risk variation, the control measures have control cost, and in order to comprehensively measure the change conditions of the power failure risk and the control cost, the system operation risk index is definedEAnd makeEThe sum of the economic index and the power failure risk index;
Figure DEST_PATH_IMAGE002AAAAA
 (2)
Figure DEST_PATH_IMAGE004AAAAA
 (3)
Figure DEST_PATH_IMAGE006AAAAA
Figure DEST_PATH_IMAGE008AAAAA
 (4)
Figure DEST_PATH_IMAGE010AAAAA
 (5)
Figure DEST_PATH_IMAGE012AAAAA
 (6)
Figure DEST_PATH_IMAGE014AAAAA
 (7)
in the formula:C p in order to correct the control cost,C ek for cascading failure paths after correction controlL k The cost of the emergency control of (a),C e to sum the emergency control costs for each cascading failure path after corrective control,C e_avg weighting the sum of the emergency control costs for the probability of each cascading failure path after correction control;K G 、K L andKrespectively a generator set, a load set and a cascading failure path set;P Gi correcting the active power of the generator i before control;
Figure DEST_PATH_IMAGE016AAAAA
correcting the active power of the generator i after control;
Figure DEST_PATH_IMAGE018AAAAA
to address cascading failure pathsL k Emergency control rear generatoriActive power of (d);a i as a generatoriAdjusting the cost coefficient;
Figure DEST_PATH_IMAGE020AAAAA
to address cascading failure pathsL k In emergency control of load nodeiThe load shedding amount of,MA load loss cost coefficient;p k_zd for cascading failure pathsL k The implementation probability of the middle-emergency control of (1);R Lk for cascading failure pathsiThe risk of (c).
S4: a coordinated control model;
the objective of the coordinated control model is to find a control scheme with the minimum operation risk under the condition of a given network topology and weather conditions, namely, the system power failure risk is reduced to the maximum extent at the minimum control cost, and the mathematical optimization model is as follows:
objective function
Figure DEST_PATH_IMAGE022AAAAA
 (8)
Constraint conditions
Figure DEST_PATH_IMAGE024AAAAA
 (9)
Figure DEST_PATH_IMAGE026AAAAA
，k=1,...,u 		(10)
Figure DEST_PATH_IMAGE028AAAAAAAA
 (11)
Figure DEST_PATH_IMAGE030AAAAA
，k=1,...,u 		(12)
Figure DEST_PATH_IMAGE032AAAAA
，k=1,...,u 		(13)
Figure DEST_PATH_IMAGE034AAAAA
 (14)
Figure DEST_PATH_IMAGE036AAAAA
，k=1,...,u 		(15)
In the formula: equation (9) represents maintaining power balance after correction control, equation (10) represents maintaining power balance after emergency control, equation (11) represents that line power flow does not exceed the limit after correction control, equation (12) represents that line power flow does not exceed the limit after emergency control, equation (13) represents that adjusting load does not exceed the limit after emergency control, and assuming that the maximum load shedding amount of a load node is 50% of the total load amount, equation (14) represents that adjusting generator output does not exceed the limit after correction control, and equation (15) represents that adjusting generator output does not exceed the limit after emergency control;
Figure DEST_PATH_IMAGE038AAAAA
controlling afterload nodes for correctioniThe active load of (2);
Figure DEST_PATH_IMAGE040AAAAA
controlling the rear circuit for correctionijIn the flow of (2) to (2),
Figure DEST_PATH_IMAGE042AAAAA
to address cascading failure pathsL k Emergency control rear line ofijIn the flow of (2) to (2),F ij,max as a lineijLimit values of the power flow;P Gi,min as a generatoriThe lower limit of the active power output is,P Gi,max as a generatoriThe upper limit of active power output.
It is worth noting that if only corrective control for all cascading failure paths is taken into account before failure, only the remaining ones areEIn (1)C p And removing the constraint conditions (10), (12), (13) and (15), then converting the model into a pure calibrationA positive control model; if only the urgent control for the fault path is taken in each cascading fault, only the urgent control for the fault path is reservedEIn (1)C e_avg And removing the constraint conditions (9), (11) and (14), and converting the model into a pure emergency control model.
In the above embodiments, the present invention is described only by way of example, but those skilled in the art, after reading the present patent application, may make various modifications to the present invention without departing from the spirit and scope of the present invention.

Claims (5)

1. A kind of linkage fault blocking technology with safety and economy coordinated, the correction control is implemented before the fault occurs, the emergency control is implemented after the fault occurs, the correction control and the emergency control are complementary; the method is characterized in that: establishing a cascading failure coordination control model;
s1, economic index and risk index;
coordinated control of economic indicatorsCFor correcting the sum of control cost and probability weighted emergency control cost, blackout risk indicatorRDefining a system operation risk index for the risk sum of each cascading failure pathEAnd makeEThe sum of the economic index and the power failure risk index;
Figure DEST_PATH_IMAGE001
Figure 998030DEST_PATH_IMAGE002
Figure DEST_PATH_IMAGE003
Figure 365557DEST_PATH_IMAGE004
Figure DEST_PATH_IMAGE005
Figure 997396DEST_PATH_IMAGE006
Figure DEST_PATH_IMAGE007
in the formula:C p in order to correct the control cost,C ek for cascading failure paths after correction controlL k The cost of the emergency control of (a),C e to sum the emergency control costs for each cascading failure path after corrective control,C e_avg weighting the sum of the emergency control costs for the probability of each cascading failure path after correction control;K G 、K L andKrespectively a generator set, a load set and a cascading failure path set;P Gi correcting the active power of the generator i before control;
Figure 725049DEST_PATH_IMAGE008
correcting the active power of the generator i after control;
Figure DEST_PATH_IMAGE009
to address cascading failure pathsL k Emergency control rear generatoriActive power of (d);a i as a generatoriAdjusting the cost coefficient;
Figure 696416DEST_PATH_IMAGE010
to address cascading failure pathsL k In emergency control of load nodeiThe load shedding amount of,MA load loss cost coefficient;p k_zd for cascading failure pathsL k The implementation probability of the middle-emergency control of (1);R Lk for cascading failure pathsiThe risk of (c);
s2: a coordinated control model;
the objective of the coordinated control model is to find a control scheme with the minimum operation risk under the condition of a given network topology and weather conditions, namely, the system power failure risk is reduced to the maximum extent at the minimum control cost, and the mathematical optimization model is as follows:
objective function
Figure DEST_PATH_IMAGE011
Constraint conditions
Figure 969266DEST_PATH_IMAGE012
Figure DEST_PATH_IMAGE013
，k=1,...,u
Figure 888068DEST_PATH_IMAGE014
Figure DEST_PATH_IMAGE015
，k=1,...,u
Figure 904565DEST_PATH_IMAGE016
，k=1,...,u
Figure DEST_PATH_IMAGE017
Figure 589493DEST_PATH_IMAGE018
，k=1,...,u
The constraint conditions comprise a first expression to a seventh expression, wherein the expressions are sequentially expressed in each of the first expression to the seventh expression, the power balance is kept after correction control, the power balance is kept after emergency control, the line power flow is not out of limit after correction control, the line power flow is not out of limit after emergency control, the load is not out of limit after emergency control, the output of the generator is not out of limit after correction control, and the output of the generator is not out of limit after emergency control;
wherein the content of the first and second substances,
Figure DEST_PATH_IMAGE019
controlling afterload nodes for correctioniThe active load of (2);
Figure 298823DEST_PATH_IMAGE020
controlling the rear circuit for correctionijIn the flow of (2) to (2),
Figure DEST_PATH_IMAGE021
to address cascading failure pathsL k Emergency control rear line ofijIn the flow of (2) to (2),F ij,max as a lineijLimit values of the power flow;P Gi,min as a generatoriThe lower limit of the active power output is,P Gi,max as a generatoriThe upper limit of active power output.
2. A safety and economic coordinated cascading failure blocking technique as claimed in claim 1, wherein: establishing a cascading failure coordination control model comprises selecting an emergency control implementation position, wherein the emergency control is specific to a certain cascading failure path, because the importance degrees of different failure links in the same cascading failure path in the cascading failure path are different, the risk importance degree of the failure link is defined to represent the importance degree of the failure link in the same cascading failure path to the cascading failure path, and the expression is as follows:
Figure 967571DEST_PATH_IMAGE022
in the formula (I), the compound is shown in the specification,R Lij for cascading failure pathsL i Front ofjThe power failure risk of each link is reduced,R i j(-1)for cascading failure pathsL i Front ofj-risk of blackout in 1 link,R Li for cascading failure pathsL i Risk of power outage;
Figure DEST_PATH_IMAGE023
the larger the value is, the fault link isT ij To cascading failure pathsL i The higher the importance of is, toL i The greater the impact of risk; in that
Figure 787759DEST_PATH_IMAGE023
And the failure link with the largest value adopts emergency control, so that the risk of a failure path can be effectively reduced, and the development of cascading failures is prevented.
3. A safety and economic coordinated cascading failure blocking technique as claimed in claim 1, wherein: if only corrective control for all cascading failure paths is considered before failure, only the remainingEIn (1)C p And removing the second, fourth, fifth and seventh expressions of the constraint condition, and converting the model into a pure correction control model.
4. A safety and economic coordinated cascading failure blocking technique as claimed in claim 1, wherein: if only the emergency control aiming at the fault path is taken into consideration in each cascading fault, only the emergency control aiming at the fault path is reservedEIn (1)C e_avg And removing the constraint conditions of the first formula, the third formula and the sixth formula, converting the model into a pure emergency control modelAnd (4) molding.
5. A safety and economic coordinated cascading failure blocking technique as claimed in claim 1, wherein:
Figure 796035DEST_PATH_IMAGE024
in the formula, the maximum load shedding amount of the load node is assumed to be 50% of the total load amount.
CN202010640361.8A 2020-07-06 2020-07-06 Cascading failure blocking technology for coordinating safety and economy Pending CN111817293A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010640361.8A CN111817293A (en) 2020-07-06 2020-07-06 Cascading failure blocking technology for coordinating safety and economy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010640361.8A CN111817293A (en) 2020-07-06 2020-07-06 Cascading failure blocking technology for coordinating safety and economy

Publications (1)

Publication Number Publication Date
CN111817293A true CN111817293A (en) 2020-10-23

Family

ID=72841567

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010640361.8A Pending CN111817293A (en) 2020-07-06 2020-07-06 Cascading failure blocking technology for coordinating safety and economy

Country Status (1)

Country Link
CN (1) CN111817293A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116245334A (en) * 2023-03-15 2023-06-09 东南大学 Power system risk perception real-time scheduling method based on deep reinforcement learning

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102664416A (en) * 2012-05-16 2012-09-12 中国电力科学研究院 Prevention and control method of power safety accident risk caused by load shedding
CN106385026A (en) * 2016-10-10 2017-02-08 国网宁夏电力公司电力科学研究院 Electric power system operation state coordinated optimization method
CN110797863A (en) * 2019-10-22 2020-02-14 广东工业大学 Economic dispatching method considering safety constraints of N-1 and N-2 of power grid

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102664416A (en) * 2012-05-16 2012-09-12 中国电力科学研究院 Prevention and control method of power safety accident risk caused by load shedding
CN106385026A (en) * 2016-10-10 2017-02-08 国网宁夏电力公司电力科学研究院 Electric power system operation state coordinated optimization method
CN110797863A (en) * 2019-10-22 2020-02-14 广东工业大学 Economic dispatching method considering safety constraints of N-1 and N-2 of power grid

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
丁明等: "基于风险评估的电力系统连锁故障协调控制模型", 《电力系统自动化》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116245334A (en) * 2023-03-15 2023-06-09 东南大学 Power system risk perception real-time scheduling method based on deep reinforcement learning
CN116245334B (en) * 2023-03-15 2024-04-16 东南大学 Power system risk perception real-time scheduling method based on deep reinforcement learning

Similar Documents

Publication Publication Date Title
CN102593829B (en) Method and device for determining transmission section in consideration of key branch circuit
CN103532140B (en) A kind of method and system containing service restoration after the distribution network failure of distributed power source
CN107069705A (en) A kind of electric network element cascading failure analogy method
CN108270216B (en) Multi-target-considered complex power distribution network fault recovery system and method
CN115034510A (en) Power grid safety risk overall process closed-loop management and control optimization method and device suitable for typhoon scene
CN104158206A (en) Grid security and stability control method considering wind power uncertainties
Vasconcelos et al. Hybrid optimization algorithm applied to adaptive protection in distribution systems with distributed generation
CN114580177A (en) Power system scheduling method based on cascading failure prevention
Zhang et al. Boosting the power grid resilience under typhoon disasters by coordinated scheduling of wind energy and conventional generators
CN111817293A (en) Cascading failure blocking technology for coordinating safety and economy
CN103106561A (en) Power system load restoration auxiliary decision system and decision generating method thereof
CN111369388A (en) Method and system for evaluating anti-vulnerability of urban power grid
CN106505576A (en) A kind of urban high voltage distribution network load based on Link path turns to supply method
CN111126841A (en) Power distribution network load to energy conversion power evaluation method based on random power flow
CN114004550B (en) Power grid emergency repair and restoration scheduling cooperative decision method and system under natural disaster
CN115204713A (en) Method and system for stable control and assistant decision-making of power system under extreme meteorological disaster
CN107392508A (en) The evaluation method and system of power network backbone Rotating fields and economic development corresponding relation
Min et al. Research on total supply capability of distribution network based on power product service system
Liu et al. A resilience enhancement scheme of cyber-physical power system for extreme natural disasters
Hu et al. Resilience-constrained economic dispatch for cascading failures prevention
Zhang et al. Bi-level programming of AC/DC hybrid distribution network based on improved genetic algorithm
Yang et al. A utility maximization strategy for the secondary system operation quality optimization of intelligent substation
Wang et al. Smart energy scheduling optimization model based on energy blockchain technology
Zhang et al. Optimization of Black-Start Scheme for Mitigating Overvoltage
Huang et al. Optimization Method for Transmission Network Structure Considering Adaptability of Large-Scale Wind Power Integration

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20201023