CN105653764B - Power grid safety accident risk class online evaluation and method for early warning - Google Patents

Power grid safety accident risk class online evaluation and method for early warning Download PDF

Info

Publication number
CN105653764B
CN105653764B CN201510980756.1A CN201510980756A CN105653764B CN 105653764 B CN105653764 B CN 105653764B CN 201510980756 A CN201510980756 A CN 201510980756A CN 105653764 B CN105653764 B CN 105653764B
Authority
CN
China
Prior art keywords
load
failure
safety accident
power grid
power
Prior art date
Application number
CN201510980756.1A
Other languages
Chinese (zh)
Other versions
CN105653764A (en
Inventor
汪际锋
鲍颜红
唐卓尧
徐泰山
姚海成
黄河
苏寅生
夏小琴
肖柱
Original Assignee
中国南方电网有限责任公司
国电南瑞科技股份有限公司
南京南瑞集团公司
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 中国南方电网有限责任公司, 国电南瑞科技股份有限公司, 南京南瑞集团公司 filed Critical 中国南方电网有限责任公司
Priority to CN201510980756.1A priority Critical patent/CN105653764B/en
Publication of CN105653764A publication Critical patent/CN105653764A/en
Application granted granted Critical
Publication of CN105653764B publication Critical patent/CN105653764B/en

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/20Design optimisation, verification or simulation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation

Abstract

The invention discloses a kind of power grid safety accident risk class online evaluation and method for early warning, belong to power system automation technology field.The present invention is based on the control strategies of EMS the power grid current method of operation and second and third road defence line provided, for the forecast failure collection of second and third road defence line examination, it is calculated by time-domain-simulation and simulates the anti-thread control device movement in second and third road, failure is obtained to subtract for load total amount, lose number of users and decompression plant stand number, according to《The disposition of electric power safety accident emergency and regulations of investigating》With《China Nanfang Grid Co., Ltd's electric power accident incident investigation regulation》Requirement divide the power grid safety accident risk class of forecast failure, and determine according to accident risk grade the important level of faulty equipment.The present invention realizes online evaluation and the early warning of power grid safety accident risk class, has established technical foundation for the real-time early warning and pre-control of power grid safety accident.

Description

Power grid safety accident risk class online evaluation and method for early warning
Technical field
The invention belongs to power system automation technology fields, and specifically the present invention relates to a kind of power grid safety accident wind Dangerous grade online evaluation and method for early warning.
Background technique
With the development of economy, network load total amount in China's increases year by year.Important electric load concentration, power grid electrical link Closely, alternating current-direct current is resulted in the potential safety and stability problem of power grid by characteristics such as electricity on a large scale and increased, and is increased generation and is seriously stopped The risk of electrification.Accident once occurs, it will causes serious economic loss and social influence.599 command of State Council《Electric power Security incident response disposition and regulations of investigating》(hereinafter referred to as《Regulations》) pacified according to electric power safety accident impact electric system The degree of full stable operation, is divided into special major accident, major accident, compared with major break down and ordinary accident for accident, and according to electricity Net load class and regionality have formulated power grid load shedding ratio, user's power failure ratio and accident rank judgment criteria respectively; 《China Nanfang Grid Co., Ltd's electric power accident incident investigation regulation》Middle south power grid accident incident investigation regulation is (following Referred to as《Regulation》) accident event is also divided into five grades, and define user corresponding to events at different levels and lose number and mistake Press plant stand number.
More than being directed at present《Regulations》With《Regulation》Power grid safety accident risk class assessment mostly use off-line analysis Means, system practical operation situation can not be represented by calculating data, and analytical calculation low efficiency lies substantially in subsequent statistical analysis, It cannot achieve the early warning to power grid safety accident.Therefore, there is an urgent need to power grid safety accident risk class online evaluation technologies, real Now to the early warning of safety accident and pre-control.
Summary of the invention
Object of the present invention is to:It can only off-line analysis, subsequent statistics for the assessment of existing power grid safety accident risk class Mode, provide a kind of power grid safety accident risk class online evaluation method, this method is based on powernet data and anticipation Failure, solving existing power grid safety accident risk class assessment technology can not asking for serious safety accident on-line early warning Topic.
Specifically, the present invention adopts the following technical solutions realize, include the following steps:
1) data acquisition is calculated:The current method of operation of power grid that is there is provided based on EMS, element static dynamic model parameters and the Two, the control strategy of three lines of defence, which is formed, calculates data, using second defence line and three lines of defence examination fault set as anticipation Fault set, Safety system obtain the action situation of security control device after forecast failure under the current method of operation according to control strategy;
2) simulation calculation of forecast failure:It is calculated, is imitated according to the time-domain-simulation that the calculating data of acquisition carry out forecast failure True calculating is fallen into a trap and the movement of second defence line feedback-type security control device, three lines of defence low-frequency low-voltage load shedding device action and power grid Disconnection device movement, and the system sectionalizing situation that failure directly results in is obtained by the method for topological analysis;
3) load loss result statisticallys analyze:On the basis of the simulation result of forecast failure, directly led according to failure The load loss amount and corresponding load equipment that the system sectionalizing situation statistics failure of cause directly results in, according to the dynamic of security control device Make situation and count corresponding load loss amount and corresponding load equipment, according to three lines of defence low-frequency low-voltage load shedding device and electricity The action situation of net disconnection device counts corresponding load loss amount and corresponding load equipment;Then according to load loss amount, Load equipment and the affiliated plant stand of equipment are lost, is calculated in pre-set power grid scope since electric power safety accident causes power grid to subtract For load proportion, the decompression plant stand number for the user's power failure ratio and different voltages grade of powering;
4) conversion of safety accident risk class and early warning:According to loss load equipment and the affiliated plant stand of equipment, according to state affairs 599 command of institute《The disposition of electric power safety accident emergency and regulations of investigating》With《China Nanfang Grid Co., Ltd's electric power Accident event investigates regulation》Defined network load rank and regional acquisition threshold value, will subtract for load proportion, power supply user Power failure ratio and decompression plant stand number and 599 command of State Council《The disposition of electric power safety accident emergency and regulations of investigating》With《In South electric network Co., Ltd of state electric power accident incident investigation regulation》Defined threshold value is compared, and determines safety accident Grade, and determine according to safety accident event class the important level of faulty equipment, all forecast failures are traversed, by accident risk Grade is unsatisfactory for desired forecast failure and its faulty equipment exports and provides alarm.
Above-mentioned technical proposal is further characterized by:In the step 3), the system sectionalizing that is directly resulted in for failure The case where causing system sectionalizing with three lines of defence disconnection device counts generation load before sub-island failure, if it exists nothing in sub-island Generator, sub-island power generation do not reach one of load total amount threshold situation up to power generation total amount threshold and sub-island load, then recognize It is unsatisfactory for service condition for sub-island, which is referred to as dangerous sub-island, and dangerous sub-island load is counted on failure and loses load In total amount.
Above-mentioned technical proposal is further characterized by:In the step 3), calculates subtract for duty ratio according to the following formula Example:
Wherein, p is to subtract for load proportion, ltDirectly cause to lose load total amount, l for failurecFor cutting load total amount after failure, lallFor system total load amount before failure, the above load statistic is directed to inside pre-set power grid scope.
Above-mentioned technical proposal is further characterized by:In the step 3), obtained from forecast failure loss load equipment Corresponding user information is taken, statistics loss number of users calculates power supply user's power failure ratio.
Beneficial effects of the present invention are as follows:The present invention is based on the EMS current method of operation of power grid provided and second and third road are anti- The control strategy of line is calculated by time-domain-simulation for the forecast failure collection of second and third road defence line examination and simulates second and third The anti-thread control device movement in road, obtains failure and subtracts for load total amount, loss number of users and decompression plant stand number, and according to《Regulations》With 《Regulation》Requirement divide forecast failure power grid safety accident risk class, for power grid safety accident risk class online comment Estimate and has established technical foundation with early warning.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Specific embodiment
Below with reference to embodiment and referring to attached drawing, present invention is further described in detail.
Embodiment 1:
One embodiment of the present of invention, step are as shown in Figure 1:
Step 1 describes to calculate the acquisition of data in Fig. 1, and the current method of operation of power grid provided based on EMS, element are quiet The control strategy in state dynamic model parameters and second and third road defence line, which is formed, calculates data, it is contemplated that fault set be second defence line and Fault set is examined in three lines of defence.Wherein, Safety system obtains according to control strategy and pacifies after forecast failure under the current method of operation Control device action situation.
Step 2 describes the simulation calculation of forecast failure in Fig. 1, i.e., carries out forecast failure according to the calculating data of acquisition Time-domain-simulation calculate.Wherein, simulation calculation fall into a trap and second defence line feedback-type security control device movement, three lines of defence low frequency Low-voltage load sheding device action and grid disconnection device action, and the system that failure directly results in is obtained by the method for topological analysis Off-the-line situation.
Step 3 describes load loss result statistical analysis in Fig. 1, i.e., on the simulation result basis of forecast failure On, the load loss amount and corresponding load that the system sectionalizing situation statistics failure directly resulted according to failure directly results in are set It is standby;Corresponding load loss amount and corresponding load equipment are counted according to the action situation of security control device;According to three lines of defence The action situation of low-frequency low-voltage load shedding device and grid disconnection device counts corresponding load loss amount and corresponding load equipment; According to load loss amount, loss load equipment and the affiliated plant stand of equipment, calculate in pre-set power grid scope due to power ampere Full accident causes power grid to subtract the decompression plant stand number for load proportion, the user's power failure ratio and different voltages grade of powering;
Failure directly results in system sectionalizing and three lines of defence disconnection device causes load loss amount when system sectionalizing to count Method is as follows:Generation load before statistics sub-island failure does not reach power generation total amount threshold without generator, sub-island power generation in sub-island if it exists And sub-island load does not reach one of load total amount threshold situation, then it is assumed that sub-island is unsatisfactory for service condition, which is referred to as Dangerous sub-island, and dangerous sub-island load is counted on into failure and is lost in load total amount.
The calculation method subtracted for load proportion is as follows:
Wherein, p is to subtract for load proportion, ltDirectly cause to lose load total amount, l for failurecFor cutting load total amount after failure, lallFor system total load amount before failure, the above load statistic is directed to inside pre-set power grid scope.
User's power failure ratio of powering and the statistical method of decompression plant stand number are as follows:
Corresponding user information is obtained from forecast failure loss load equipment, statistics loss number of users calculates power supply and uses Family power failure ratio.If all users of certain plant stand are loss load user, which is decompression plant stand, statistics anticipation respectively 500kV decompression plant stand number, 220kV decompression plant stand number, 110kV decompression plant stand number, 35kV decompression plant stand number under failure.
Step 4 describes the conversion of safety accident risk class and early warning in Fig. 1, i.e., according to loss load equipment and equipment Affiliated plant stand, according to《Regulations》With《Regulation》Defined network load rank and regional acquisition threshold value;It will subtract for duty ratio Example, power supply user's power failure ratio and decompression plant stand number with《Regulations》With《Regulation》Defined threshold value is compared, and determines safety Incident classification, and determine according to safety accident event class the important level of faulty equipment;All forecast failures are traversed, by accident Risk class is unsatisfactory for desired forecast failure and its faulty equipment exports and provides alarm.
For《Regulations》With《Regulation》The threshold value of defined, according to loss load equipment and the affiliated plant stand of equipment according to negative Lotus rank and regional acquisition.If system safety after the anti-thread control device movement in second and third road, system safety accident grade pair Answer " special major accident ", " major accident ", " compared with major break down ", " ordinary accident ", " below standard accident ";If second and third road is anti- System is still dangerous after thread control device movement, then system safety accident grade corresponds to " special major accident ", " is greater than great thing Therefore ", " be greater than compared with major break down ", " being greater than ordinary accident " and " latent defect ".
In short, power grid safety accident risk class online evaluation and method for early warning are currently run based on the power grid that EMS is provided The control strategy of mode and second and third road defence line passes through time-domain-simulation for the forecast failure collection of second and third road defence line examination The anti-thread control device movement in second and third road is calculated and simulated, failure is obtained and subtracts for load total amount, loss number of users and decompression plant stand Number, and according to《Regulations》With《Regulation》Requirement divide forecast failure power grid safety accident risk class, be power grid security thing Therefore early warning and pre-control established technical foundation.
Although the present invention has been described by way of example and in terms of the preferred embodiments, embodiment is not for the purpose of limiting the invention.Not It is detached from the spirit and scope of the present invention, any equivalent change or retouch done also belongs to the protection scope of the present invention.Cause This protection scope of the present invention should be based on the content defined in the claims of this application.

Claims (3)

1. power grid safety accident risk class online evaluation and method for early warning, which is characterized in that include the following steps:
1) data acquisition is calculated:Based on EMS provide the current method of operation of power grid, element static dynamic model parameters and second, The control strategy of three lines of defence, which is formed, calculates data, using second defence line and three lines of defence examination fault set as forecast failure Collection, Safety system obtain the action situation of security control device after forecast failure under the current method of operation according to control strategy;
2) simulation calculation of forecast failure:It is calculated according to the time-domain-simulation that the calculating data of acquisition carry out forecast failure, emulation meter Calculation is fallen into a trap and the movement of second defence line feedback-type security control device, three lines of defence low-frequency low-voltage load shedding device action and grid disconnection Device action, and the system sectionalizing situation that failure directly results in is obtained by the method for topological analysis;
3) load loss result statisticallys analyze:On the basis of the simulation result of forecast failure, directly resulted according to failure The load loss amount and corresponding load equipment that system sectionalizing situation statistics failure directly results in, according to the movement feelings of security control device Condition counts corresponding load loss amount and corresponding load equipment, according to three lines of defence low-frequency low-voltage load shedding device and power grid solution The action situation of array apparatus counts corresponding load loss amount and corresponding load equipment;Then according to load loss amount, loss Load equipment and the affiliated plant stand of equipment calculate in pre-set power grid scope since electric power safety accident causes power grid to subtract for negative The decompression plant stand number of lotus ratio, the user's power failure ratio and different voltages grade of powering;
It calculates and subtracts for load proportion according to the following formula:
Wherein, p is to subtract for load proportion, ltDirectly cause to lose load total amount, l for failurecFor cutting load total amount, l after failureallFor System total load amount before failure, the above load statistic are directed to inside pre-set power grid scope;
4) conversion of safety accident risk class and early warning:According to loss load equipment and the affiliated plant stand of equipment, according to State Council 599 Command《The disposition of electric power safety accident emergency and regulations of investigating》With《China Nanfang Grid Co., Ltd's electric power accident thing Part investigates regulation》Defined network load rank and regional acquisition threshold value, will subtract for load proportion, power supply user's power failure ratio Example and decompression plant stand number and 599 command of State Council《The disposition of electric power safety accident emergency and regulations of investigating》With《Southern china Power grid Co., Ltd electric power accident incident investigation regulation》Defined threshold value is compared, and determines safety accident grade, and The important level that faulty equipment is determined according to safety accident event class traverses all forecast failures, not by accident risk grade The forecast failure and its faulty equipment met the requirements exports and provides alarm.
2. power grid safety accident risk class online evaluation according to claim 1 and method for early warning, it is characterised in that:Institute It states in step 3), the case where system sectionalizing and three lines of defence disconnection device directly resulted in for failure causes system sectionalizing, Generation load before statistics sub-island failure does not reach power generation total amount threshold and sub-island without generator, sub-island power generation in sub-island if it exists Load does not reach one of load total amount threshold situation, then it is assumed that sub-island is unsatisfactory for service condition, which is referred to as dangerous son Island, and dangerous sub-island load is counted on into failure and is lost in load total amount.
3. power grid safety accident risk class online evaluation according to claim 1 and method for early warning, it is characterised in that:Institute It states in step 3), corresponding user information is obtained from forecast failure loss load equipment, statistics loss number of users calculates power supply User's power failure ratio.
CN201510980756.1A 2015-12-22 2015-12-22 Power grid safety accident risk class online evaluation and method for early warning CN105653764B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510980756.1A CN105653764B (en) 2015-12-22 2015-12-22 Power grid safety accident risk class online evaluation and method for early warning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510980756.1A CN105653764B (en) 2015-12-22 2015-12-22 Power grid safety accident risk class online evaluation and method for early warning

Publications (2)

Publication Number Publication Date
CN105653764A CN105653764A (en) 2016-06-08
CN105653764B true CN105653764B (en) 2018-11-30

Family

ID=56476781

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510980756.1A CN105653764B (en) 2015-12-22 2015-12-22 Power grid safety accident risk class online evaluation and method for early warning

Country Status (1)

Country Link
CN (1) CN105653764B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105447774A (en) * 2016-01-12 2016-03-30 国网山东省电力公司青岛供电公司 Power grid safety accident risk grade online evaluation and early warning method and apparatus
CN106803005B (en) * 2017-01-20 2019-08-06 北京航空航天大学 A kind of technological procedure risk evaluating method based on FRAM
CN107276075A (en) * 2017-06-20 2017-10-20 贵州电网有限责任公司电力调度控制中心 A kind of multizone load shedding Collaborative Decision Making Method of meter and power grid accident risk class
CN107658855A (en) * 2017-10-31 2018-02-02 海南电网有限责任公司 A kind of multi-functional trouble analysis system
CN107977774A (en) * 2017-11-13 2018-05-01 广东电网有限责任公司惠州供电局 A kind of method of electrical network weak link automatic identification after failure
CN108061841A (en) * 2017-11-13 2018-05-22 广东电网有限责任公司惠州供电局 A kind of method of electric network fault event class automatic identification
CN109191007A (en) * 2018-09-28 2019-01-11 广东电网有限责任公司 A kind of method and system that grid equipment N-1 consequence grade determines automatically
CN109633333A (en) * 2018-12-27 2019-04-16 国电南瑞科技股份有限公司 All kinds of cutting load amount collision detection of provincial and above power grid and coordinate method of calibration
CN110232203B (en) * 2019-04-22 2020-03-03 山东大学 Knowledge distillation optimization RNN short-term power failure prediction method, storage medium and equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104268693A (en) * 2014-09-26 2015-01-07 国家电网公司 Power grid dispatching determining method and system
CN104538962A (en) * 2015-01-19 2015-04-22 国家电网公司 Method for evaluating safety risk of power distribution network on basis of average expected value
CN104616089A (en) * 2014-11-19 2015-05-13 南昌大学 Large power grid running risk evaluation system
CN104732458A (en) * 2015-03-31 2015-06-24 河南行知专利服务有限公司 Electric system risk assessment method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100138253A1 (en) * 2008-12-02 2010-06-03 Chun-Chang Chao All aspect quantification system for the risk rating of operating errors for an advanced boiling water reactor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104268693A (en) * 2014-09-26 2015-01-07 国家电网公司 Power grid dispatching determining method and system
CN104616089A (en) * 2014-11-19 2015-05-13 南昌大学 Large power grid running risk evaluation system
CN104538962A (en) * 2015-01-19 2015-04-22 国家电网公司 Method for evaluating safety risk of power distribution network on basis of average expected value
CN104732458A (en) * 2015-03-31 2015-06-24 河南行知专利服务有限公司 Electric system risk assessment method

Also Published As

Publication number Publication date
CN105653764A (en) 2016-06-08

Similar Documents

Publication Publication Date Title
Laghari et al. Application of computational intelligence techniques for load shedding in power systems: A review
Liu et al. A multiagent system-based protection and control scheme for distribution system with distributed-generation integration
Rios et al. Value of security: modeling time-dependent phenomena and weather conditions
CN102368610B (en) Evaluation method based on distribution system security region
Schweitzer et al. Advanced real-time synchrophasor applications
Fotuhi-Firuzabad et al. An analytical method to consider DG impacts on distribution system reliability
Chen et al. Nontechnical loss and outage detection using fractional-order self-synchronization error-based fuzzy petri nets in micro-distribution systems
CN102237720B (en) Analysis, early warning and control method for power grid security
CN102063651B (en) Urban power grid risk evaluation system based on on-line data acquisition
CN102324067B (en) Electrical secondary equipment state evaluation method and system thereof
CN101800426B (en) Safety level evaluation method of power grid
CN101640418B (en) Identification method of transient state stable key transmission cross-section of electric power system fault
CN103683277B (en) A kind of electric power system transient stability cutting load controls validity evaluation index computational methods
CN101425682B (en) Electric grid relay protection constant value on-line check integrated data processing method
Bollen et al. Trends, challenges and opportunities in power quality research
CN104682381B (en) Method for calculating reliability of flexible direct-current (DC) transmission system of large wind farm
CN103903196B (en) A kind of dispatching of power netwoks of considering ageing equipment factor moves real-time methods of risk assessment
CN101908764B (en) Self-healing control method of electric network
CN106384210B (en) A kind of power transmission and transforming equipment maintenance prioritization method based on maintenance risk income
CN101436780A (en) Self-healing control method for urban power distribution network
CN101425686A (en) Electrical power system on-line safety and stability evaluation forecast failure collection adaptive selection method
WO2014090018A1 (en) Iec61850 standard-based intelligent power distribution terminal
CN103218754B (en) A kind of risk checking method of Forming Electrical Dispatching Command Tickets and device
CN104933515B (en) A kind of management system for petrochemical enterprise power grid
CN103036230A (en) Dynamic equivalence method of alternating-current-direct-current serial-parallel large power system based on engineering application

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant