CN105117840B - A kind of Study of Risk Evaluation Analysis for Power System method considering information system effect - Google Patents
A kind of Study of Risk Evaluation Analysis for Power System method considering information system effect Download PDFInfo
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- CN105117840B CN105117840B CN201510515074.3A CN201510515074A CN105117840B CN 105117840 B CN105117840 B CN 105117840B CN 201510515074 A CN201510515074 A CN 201510515074A CN 105117840 B CN105117840 B CN 105117840B
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004458 analytical method Methods 0.000 title claims abstract description 4
- 238000011156 evaluation Methods 0.000 title claims abstract description 4
- 230000007257 malfunction Effects 0.000 claims abstract description 8
- 238000012502 risk assessment Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 abstract description 7
- 230000004927 fusion Effects 0.000 abstract description 2
- 238000004364 calculation method Methods 0.000 description 3
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Abstract
The invention discloses a kind of Study of Risk Evaluation Analysis for Power System methods of consideration information system effect, comprising: the electrical equipment fault probability correction model for considering information system effect is established, to calculate the probability of malfunction for considering the power equipment of information system effect；The electric system risk indicator for considering information system effect, including trend overload risk and voltage limit risk are calculated, Step 3: risk of selection is the smallest as one of preferred programme from the information system programming scheme of a variety of different topology structures.Due to smart grid by be electric power space and information space height fusion power information physics system, with the opening of power communication net, compatibility and interconnection, risk will necessarily be brought to the operation of electric system, appraisal procedure of the present invention considers the electric system risk of information system effect when carrying out Electric Power Network Planning, to strive for the risk of programme being preferably minimized.
Description
Technical field
The invention belongs to the innovative technologies in Electric Power Network Planning field, more particularly, to a kind of risk of consideration information system effect
Appraisal procedure.
Background technique
The most essential feature of smart grid is: the two-way flow of electric power and information, and thus sets up a height certainly
Dynamicization and widely distributed energy exchange network；Distributed computing and the advantage of communication are introduced power grid, realize that information is handed in real time
Change and reach the equilibrium of supply and demand near-instantaneous on equipment level.This means that following power grid will be by integrated power network and communication
Net composition, its various functions and application rely on Information and Communication Technology (Information and Communication
Technologies, ICT), and in order to cover external system (intelligent transportation etc.), the application field of ICT will expand, because
This, smart grid will be power information physics system (Electric Cyber- that electric power space and information space height merge
Physical System, ECPS).It, will necessarily be to the operation of electric system with the opening of power communication net, compatibility and interconnection
Bring risk, it is therefore necessary to the electric system risk that information system effect is considered when carrying out Electric Power Network Planning, thus it is preferred that wind
The minimum programme in danger.
Summary of the invention
The invention proposes a kind of power equipment methods of risk assessment of consideration information system effect, so as to Electric Power Network Planning people
Member's preferably preferred plan scheme.
In order to solve the above-mentioned technical problem, a kind of electric system risk considering information system effect proposed by the present invention is commented
Estimate method, wherein the power equipment in electric system includes line and transformer both ends breaker；The methods of risk assessment includes
Following steps:
Step 1: establishing the electrical equipment fault probability correction model for considering information system effect, wherein do not consider information
The probability of malfunction of the power equipment g of systemic effect is pg, consider that the probability of malfunction of the power equipment g of information system effect is pg',
pg=1-u1·u2 (1)
In formula (1), u1And u2It is the availability for not considering the both ends the power equipment g breaker of information system effect respectively；
pg'=1-u1′·u2′ (2)
In formula (2), pg' the probability of malfunction for being power equipment g, u1' and u2' it is the electric power for considering information system effect respectively
The availability of the both ends equipment g breaker；
u1'=u10·u1 (3)
u2'=u20·u2 (4)
In formula (3) and formula (4), u10And u20It is the availability of the corresponding information side of the both ends power equipment g breaker respectively,
Formula (1), formula (3) and formula (4) is brought into formula (2) to obtain:
pg'=1-u1′·u2′
=1- (u10·u1)·(u20·u2) (5)
=1-u10·u20·(u1·u2)
=1-u10·u20·(1-pg)
Step 2: calculating the electric system risk indicator for considering information system effect, the electric system risk indicator packet
Trend overload risk and voltage limit risk are included,
When accident occurs for power equipment g, the trend on i-th line road overloads consequence IS,giIt is got over the voltage of j-th of node
Limit consequence IV,gjIt is respectively as follows:
In formula (6), SgiIt is the apparent energy on i-th line road, SiNThe rated power on i-th line road,
In formula (7), Ugj(p.u.) be j-th of node voltage magnitude, Uinf,jAnd Usup,jIt is that j-th of node allows respectively
Voltage upper and lower limit；
The trend on i-th line road overloads risk RS,giWith the voltage limit risk R of j-th of nodeV,gjIt is as follows respectively:
RS,gi=Pg′·IS,gi (8)
RV,gj=Pg′·IV,gj (9)
Step 3: risk of selection is the smallest as preferred from the information system programming scheme of a variety of different topology structures
One of programme, the topological structure of information system include stelliform connection topology configuration, bus type topological structure and ring topology.
Compared with prior art, the beneficial effects of the present invention are:
Due to smart grid by be electric power space and information space height fusion power information physics system, with electric power
Opening, compatibility and the interconnection of communication network, will necessarily bring risk to the operation of electric system, and appraisal procedure of the present invention is carrying out electricity
The electric system risk that information system effect is considered when network planning is drawn, to strive for the risk of programme being preferably minimized.
Detailed description of the invention
Fig. 1 is embodiment IEEE-118 node system subregion schematic diagram；
Fig. 2 is embodiment Hub-Spoken Topology Configuration information system schematic diagram；
Fig. 3 is ring-like topology information system schematic in embodiment；
Fig. 4 is bus type topological structure information system schematic diagram in embodiment.
Specific embodiment
Technical solution of the present invention is described in further detail in the following with reference to the drawings and specific embodiments, it is described specific
Embodiment is only explained the present invention, is not intended to limit the invention.
In conjunction with attached drawing, subordinate list, by taking IEEE-118 node system as an example, the electricity for considering information system effect a kind of to the present invention
Force system methods of risk assessment is illustrated:
The first step establishes the electrical equipment fault probability correction model for considering information system effect, due to power equipment two
Holding the failure of breaker will lead to, power equipment is out of service, therefore the power equipment in the present invention mainly considers route and transformation
Device both ends breaker；Consider the failure for the power equipment g that the electrical equipment fault probability correction model of information system effect provides
Probability pg' calculation formula are as follows:
pg'=1-u1′·u2′
Wherein, u1' and u2' it is the availability for considering the both ends the power equipment g breaker of information system effect respectively；Accordingly
Ground does not consider the probability of malfunction p of the power equipment g of information system effectgCalculation formula are as follows:
pg=1-u1·u2
Wherein, u1And u2It is the availability for not considering the both ends the power equipment g breaker of information system effect respectively；
u1'=u10·u1
u2'=u20·u2
Wherein, u10And u20It is the availability of the corresponding information side of the both ends power equipment g breaker respectively；
Therefore have:
pg'=1-u1′·u2′
=1- (u10·u1)·(u20·u2)
=1-u10·u20·(u1·u2)
=1-u10·u20·(1-pg)
Second step calculates the electric system risk indicator for considering information system effect, the electric system used in the present invention
Risk indicator includes that trend overload risk and voltage limit risk, calculation method are as follows:
When accident occurs for power equipment g, the trend on i-th line road overloads consequence IS,giIt is got over the voltage of j-th of node
Limit consequence IV,gjIt is respectively as follows:
Wherein, SgiIt is the apparent energy on i-th line road, SiNThe rated power on i-th line road, UgjIt (p.u.) is j-th of section
The voltage magnitude of point, Uinf,jAnd Usup,jIt is the voltage upper and lower limit that j-th of node allows respectively；
The trend on i-th line road overloads risk RS,giWith the voltage limit risk R of j-th of nodeV,gjIt is as follows respectively:
RS,gi=pg′·IS,gi
RV,gj=pg′·IV,gj
Step 3: risk of selection is the smallest as preferred from the information system programming scheme of a variety of different topology structures
One of programme, the topological structure of information system includes stelliform connection topology configuration, bus type topological structure and ring topology knot
Structure.
With division result shown in FIG. 1 (including 1,2,3,4,5,6 and 7) division information system realm control unit, Fig. 2,
Fig. 3, Fig. 4 are stelliform connection topology configuration information system, ring topology information system and bus type topological structure information system respectively
System, information system component dependability parameter is as shown in table 1, and the risk of different information systems topological structure is as shown in table 2.
1 information system component dependability parameter of table
The risk of 2 different information systems topological structure of table
As it can be seen that consider information system effect after, the Hazard ratio of system do not consider information side influence when it is big, and it is each topology knot
Risk ranking present in the information system of structure are as follows: bus-type > star-like > ring-like, therefore in the case where economic condition allows, it answers
Pay the utmost attention to ring type structure.
Although above in conjunction with attached drawing, invention has been described, and the invention is not limited to above-mentioned specific implementations
Mode, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art are at this
Under the enlightenment of invention, without deviating from the spirit of the invention, many variations can also be made, these belong to of the invention
Within protection.
Claims (1)
1. a kind of Study of Risk Evaluation Analysis for Power System method for considering information system effect, wherein the power equipment packet in electric system
Include line and transformer both ends breaker；
It is characterized in that, the methods of risk assessment the following steps are included:
Step 1: establishing the electrical equipment fault probability correction model for considering information system effect, wherein do not consider information system
The probability of malfunction of the power equipment g of effect is pg, consider that the probability of malfunction of the power equipment g of information system effect is p 'g, pg=
1-u1·u2 (1)
In formula (1), u1And u2It is the availability for not considering the both ends the power equipment g breaker of information system effect respectively；
p′g=1-u1′·u2′ (2)
In formula (2), p 'gFor the probability of malfunction of power equipment g, u1' and u2' it is the power equipment g for considering information system effect respectively
The availability of both ends breaker；
u′1=u10·u1 (3)
u′2=u20·u2 (4)
In formula (3) and formula (4), u10And u20It is the availability of the corresponding information side of the both ends power equipment g breaker respectively,
Formula (1), formula (3) and formula (4) are substituted into formula (2) to obtain:
Step 2: calculating the electric system risk indicator for considering information system effect, the electric system risk indicator includes tide
It flows through and carries risk and voltage limit risk,
When accident occurs for power equipment g, the trend on i-th line road overloads consequence IS,giWith the voltage out-of-limit consequence of j-th of node
IV,gjIt is respectively as follows:
In formula (6), SgiIt is the apparent energy on i-th line road, SiNThe rated power on i-th line road,
In formula (7), UgjIt is the voltage magnitude of j-th of node, Uinf,jAnd Usup,jIt is that the voltage that j-th of node allows is upper and lower respectively
Limit；
The trend on i-th line road overloads risk RS,giWith the voltage limit risk R of j-th of nodeV,gjIt is as follows respectively:
RS,gi=Pg′·IS,gi (8)
RV,gj=Pg′·IV,gj (9)
Step 3: risk of selection is the smallest as preferred planning from the information system programming scheme of a variety of different topology structures
One of scheme, the topological structure of information system include stelliform connection topology configuration, bus type topological structure and ring topology.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105867347B (en) * | 2016-03-29 | 2020-01-17 | 全球能源互联网研究院 | Cross-space cascading fault detection method based on machine learning technology |
| CN105763562B (en) * | 2016-04-15 | 2019-04-09 | 全球能源互联网研究院 | Power Information Network method for establishing model and system towards electric power CPS risk assessment |
| CN107220775B (en) * | 2017-06-01 | 2020-04-07 | 东北大学 | Active power distribution network multi-view cooperative vulnerability assessment method considering information system effect |
| CN109345115B (en) * | 2018-09-30 | 2021-08-06 | 国网浙江省电力有限公司 | Evaluation method for evolution driving metric value of power information physical system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120072039A1 (en) * | 2009-02-20 | 2012-03-22 | Anderson Roger N | Dynamic Contingency Avoidance and Mitigation System |
| CN102708411A (en) * | 2012-04-23 | 2012-10-03 | 中国电力科学研究院 | Method for evaluating risk of regional grid on line |
| CN102737286A (en) * | 2012-04-23 | 2012-10-17 | 中国电力科学研究院 | Online risk analysis system and method for regional power grid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120072039A1 (en) * | 2009-02-20 | 2012-03-22 | Anderson Roger N | Dynamic Contingency Avoidance and Mitigation System |
| CN102708411A (en) * | 2012-04-23 | 2012-10-03 | 中国电力科学研究院 | Method for evaluating risk of regional grid on line |
| CN102737286A (en) * | 2012-04-23 | 2012-10-17 | 中国电力科学研究院 | Online risk analysis system and method for regional power grid |
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