CN102542355A - Operation planning part load method - Google Patents

Operation planning part load method Download PDF

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CN102542355A
CN102542355A CN2011103682174A CN201110368217A CN102542355A CN 102542355 A CN102542355 A CN 102542355A CN 2011103682174 A CN2011103682174 A CN 2011103682174A CN 201110368217 A CN201110368217 A CN 201110368217A CN 102542355 A CN102542355 A CN 102542355A
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load
index
scheme
alternatives
under
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CN102542355B (en
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方勇杰
李兆伟
李威
刘福锁
赵理
陈涛
冯丽
张同尊
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Chongqing City Electrical Power Co.
Nari Technology Co Ltd
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CHONGQING CITY ELECTRICAL POWER Co
State Grid Electric Power Research Institute
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    • Y—GENERAL 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

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Abstract

The invention belongs to the technical field of electric power system and automation thereof, and provides an operation planning part load method, which builds evaluation indexes of an operating planning part load scheme which covers economy, security and reliability, rapidly screens unreasonable alternatives through short circuit currents exceeding the standard, synthetically evaluates inferiority of different effective alternatives through a fuzzy decision method, and selects an optimal operating planning part load scheme, thereby providing method support for power system mode planners to formulate a part load scheme.

Description

A kind of operation planning divides the load method
Technical field
The invention belongs to the Power System and its Automation technical field, the present invention relates to a kind of operation planning more precisely and divide the load method.
Background technology
Different load partition schemes will exert an influence to many aspects such as system short-circuit electric current, security and stability, net damage, power supply reliabilities.Under some situation, certain divides the load scheme when improving an index, even can worsen another index.How expansion gradually along with scale of power takes into account a plurality of targets, formulates the rationalization partition burst, improves security of system power supply nargin, and increasing power supply reliability is the major issue that current power network development faces.
How to formulate a comprehensive appraisement system of system, how to each minute the load alternatives to make optimum decision be the two large problems that the branch load technique needs to be resolved hurrily.A kind of operation planning that the present invention proposes divides the load method; Proposed to contain economy, intelligence technical, reliability is divided the load assessment indicator system; And utilize ripe fuzzy Decision Making Method to solve this multi-objective optimization question, for formulating rational branch load scheme, the operation of power networks planning personnel provide operation to support.
Summary of the invention
The objective of the invention is: select decision support is provided for a minute load scheme optimization, make selected scheme take into account economy, technical, reliability.The present invention has at first set up the assessment indicator system of intelligent branch load, obtains the desired value under the different alternative branch load schemes through simulation calculation, uses fuzzy Decision Making Method that alternatives is carried out comprehensive evaluation again, thereby obtains the optimal case in the alternatives.
Specifically, the present invention includes following steps:
1) formulates operation planning and divide load evaluate alternatives index.Evaluation index comprises economy, technical, three aspects of reliability.Economic index comprises that net decreases; Technical index comprises short circuit current level, transient security nargin and three parts of N-1 static evaluation; Reliability index comprises holding carries ratio, two indexs of terminal transformer station supply load.
2) based on electric network composition and branch load passage situation, form operation planning through permutation and combination and divide the load alternative.
3) calculate the single-phase and three-phase shortcircuit electric current of all buses under each alternatives, single busbar short-circuit current index I=(busbar short-circuit electric current/rupturing capacity).I>1, the expression short-circuit current exceeds standard, and then eliminates this alternatives, finally forms effective alternatives collection, effective scheme i short-circuit current index I iGet the maximal value in all busbar short-circuit electric current indexs under this scheme.
4) formulate the examination fault collection of computing system safety and stability nargin, set the examination bus that is used for calculated rate margin of safety and voltage security nargin and two-element list thereof (V, t) (f, t).Utilize transient security nargin under all examination faults of each effective scheme of FASTEST computed in software, effective scheme i transient security nargin S iGet under this scheme transient security nargin minimum value under all examination faults.
5) indexs such as net damage, N-1 static evaluation index, capacity-load ratio and terminal transformer station supply load under the effective alternative of calculating.
Wherein, net decreases P can calculate acquisition through trend, remembers that i the off line damage of scheme is P iWhether N-1 static evaluation index is judged through concerning; Go out not occur overload or overvoltage problem in the static evaluation through logical value 1 expression; Occur overload or overvoltage problem in the static evaluation through logical value 0 expression, remember that the static evaluation index is M under i the effective scheme iSubregion hold to carry than 500kV power transformation total volume/subregion total load in the T=subregion, remembers that holding under i the scheme year is T than index i, get under this scheme all subregions and hold to carry and compare minimum value; Terminal transformer station supply load is meant that 220kV circuit N-2 fault can cause all 220kV substations of this station decompression to supply the load total amount, remembers that i scheme lower end transformer station supply load index is E i
6) form parameter value set under each effective alternatives, generate the goal set matrix (1) that is used to optimize.
Figure 2011103682174100002DEST_PATH_IMAGE001
（1）
7) utilize ripe fuzzy Decision Making Method to estimate each minute load alternatives, obtain optimal case.
Effect and advantage
Beneficial effect of the present invention is following: the operation planning that proposes among the present invention divides the load assessment indicator system; Help aspect comprehensive evaluations such as the economy from electrical network, technical, reliability to divide the superiority-inferiority of load scheme; Utilize fuzzy Decision Making Method to solve this multi-objective optimization question; From a plurality of alternative branch load schemes, obtain optimal case, theory support and method of operating are provided for the operation of power networks planning personnel formulates rational branch load scheme.
Description of drawings
Fig. 1 is the process flow diagram of the inventive method.
Embodiment
The present invention includes following steps:
1) formulates operation planning and divide load evaluate alternatives index.Evaluation index comprises economy, technical, three aspects of reliability.Economic index comprises that net decreases; Technical index comprises short circuit current level, transient security nargin and three parts of N-1 static evaluation; Reliability index comprises holding carries ratio, two indexs of terminal transformer station supply load.
2) based on electric network composition and branch load passage situation, form operation planning through permutation and combination and divide the load alternative.
3) calculate the single-phase and three-phase shortcircuit electric current of all buses under each alternatives, single busbar short-circuit current index I=(busbar short-circuit electric current/rupturing capacity).I>1, the expression short-circuit current exceeds standard, and then eliminates this alternatives, finally forms effective alternatives collection, effective scheme i short-circuit current index I iGet the maximal value in all busbar short-circuit electric current indexs under this scheme.
4) formulate the examination fault collection of computing system safety and stability nargin, set the examination bus that is used for calculated rate margin of safety and voltage security nargin and two-element list thereof (V, t) (f, t).Utilize transient security nargin under all examination faults of each effective scheme of FASTEST computed in software, effective scheme i transient security nargin S iGet under this scheme transient security nargin minimum value under all examination faults.
5) indexs such as net damage, N-1 static evaluation index, capacity-load ratio and terminal transformer station supply load under the effective alternative of calculating.
Wherein, net decreases P can calculate acquisition through trend, remembers that i the off line damage of scheme is P iWhether N-1 static evaluation index is judged through concerning; Go out not occur overload or overvoltage problem in the static evaluation through logical value 1 expression; Occur overload or overvoltage problem in the static evaluation through logical value 0 expression, remember that the static evaluation index is M under i the effective scheme iSubregion hold to carry than 500kV power transformation total volume/subregion total load in the T=subregion, remembers that holding under i the scheme year is T than index i, get under this scheme all subregions and hold to carry and compare minimum value; Terminal transformer station supply load is meant that 220kV circuit N-2 fault can cause all 220kV substations of this station decompression to supply the load total amount, remembers that i scheme lower end transformer station supply load index is E i
6) form parameter value set under each effective alternatives, generate the goal set matrix (1) that is used to optimize.
（1）
7) utilize ripe fuzzy Decision Making Method to estimate each minute load alternatives, obtain optimal case.

Claims (5)

1. an operation planning divides the load method, it is characterized in that comprising the following steps:
1) formulate operation planning and divide load evaluate alternatives index, evaluation index comprises economy, technical, three aspects of reliability; Economic index comprises that net decreases; Technical index comprises short circuit current level, transient security nargin and three parts of N-1 static evaluation; Reliability index comprises holding carries ratio, two indexs of terminal transformer station supply load;
2) based on electric network composition and branch load passage situation, form operation planning through permutation and combination and divide the load alternative;
3) calculate the single-phase and three-phase shortcircuit electric current of all buses under each alternatives, single busbar short-circuit current index I=(busbar short-circuit electric current/rupturing capacity); I>1, the expression short-circuit current exceeds standard, and then eliminates this alternatives, finally forms effective alternatives collection, effective scheme i short-circuit current index I iGet the maximal value in all busbar short-circuit electric current indexs under this scheme;
4) formulate the examination fault collection of computing system safety and stability nargin, set the examination bus that is used for calculated rate margin of safety and voltage security nargin and two-element list thereof (V, t) (f, t);
Utilize transient security nargin under all examination faults of each effective scheme of FASTEST computed in software, effective scheme i transient security nargin S iGet under this scheme transient security nargin minimum value under all examination faults;
5) net damage, N-1 static evaluation index, capacity-load ratio and the terminal transformer station supply load index under the effective alternative of calculating;
Wherein, net decreases P can calculate acquisition through trend, remembers that i the off line damage of scheme is P iWhether N-1 static evaluation index is judged through concerning; Go out not occur overload or overvoltage problem in the static evaluation through logical value 1 expression; Occur overload or overvoltage problem in the static evaluation through logical value 0 expression, remember that the static evaluation index is M under i the effective scheme iSubregion hold to carry than 500kV power transformation total volume/subregion total load in the T=subregion, remembers that holding under i the scheme year is T than index i, get under this scheme all subregions and hold to carry and compare minimum value; Terminal transformer station supply load is meant that 220kV circuit N-2 fault can cause all 220kV substations of this station decompression to supply the load total amount, remembers that i scheme lower end transformer station supply load index is E i
6) form parameter value set under each effective alternatives, generate the goal set matrix (1) that is used to optimize
Figure 2011103682174100001DEST_PATH_IMAGE001
（1）
7) utilize ripe fuzzy Decision Making Method to estimate each minute load alternatives, obtain optimal case.
2. a kind of operation planning according to claim 1 divides the load method; It is characterized in that, utilize net damage, short-circuit current, transient security nargin, static security result, appearance to carry 6 index examinations such as ratio and terminal transformer station supply load operation plannings in the said step 1) and divide the load scheme.
3. a kind of operation planning according to claim 1 divides the load method, it is characterized in that, utilizes the short-circuit current rapid screening that exceeds standard to go out irrational alternatives in the said step 3).
4. a kind of operation planning according to claim 1 divides the load method; It is characterized in that; The short circuit current level index of the alternatives in the said step 3) is taken as the maximal value of the single busbar short-circuit current index of all buses in this alternatives, and wherein single busbar short-circuit current index adopts and calculated by formula (1);
Single busbar short-circuit current index
Figure 499778DEST_PATH_IMAGE002
=(busbar short-circuit electric current/rupturing capacity) (1).
5. a kind of operation planning according to claim 1 divides the load method, it is characterized in that, the fuzzy Decision Making Method of utilizing in the said step 7) is optimized to obtain the optimal case in the alternatives the optimization aim set matrix that forms.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103093288A (en) * 2013-02-21 2013-05-08 江苏省电力公司电力科学研究院 Partition power grid bus load prediction system based on weather information
CN103208090A (en) * 2013-04-11 2013-07-17 国网电力科学研究院 Power-cut scheme scheduling scheme optimization method based on overall distribution network
CN104392330A (en) * 2014-12-05 2015-03-04 国家电网公司 500 kV/220 kV power grid partitioning strategy evaluation method
CN105095971A (en) * 2014-05-07 2015-11-25 国网山东省电力公司泰安供电公司 Comprehensive assessment planning method based on power distribution network subareas
CN106451414A (en) * 2016-06-30 2017-02-22 国电南瑞科技股份有限公司 Dynamic partition-based large power grid emergency state control auxiliary decision method
CN109659934A (en) * 2018-12-24 2019-04-19 中国电力科学研究院有限公司 New-energy grid-connected based on short circuit current nargin plans preferred method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101179195A (en) * 2007-11-15 2008-05-14 上海交通大学 Power distribution network planning scheme assistant decision system
CN101694940A (en) * 2009-10-23 2010-04-14 国网电力科学研究院 Optimal power flow implementation method considering transient security constraints
CN101916990A (en) * 2010-08-18 2010-12-15 华北电力科学研究院有限责任公司 Optimized check method of short-circuit current limiting measure
CN102214922A (en) * 2011-06-27 2011-10-12 山东电力研究院 Evaluation system of power network planning scheme

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101179195A (en) * 2007-11-15 2008-05-14 上海交通大学 Power distribution network planning scheme assistant decision system
CN101694940A (en) * 2009-10-23 2010-04-14 国网电力科学研究院 Optimal power flow implementation method considering transient security constraints
CN101916990A (en) * 2010-08-18 2010-12-15 华北电力科学研究院有限责任公司 Optimized check method of short-circuit current limiting measure
CN102214922A (en) * 2011-06-27 2011-10-12 山东电力研究院 Evaluation system of power network planning scheme

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103093288A (en) * 2013-02-21 2013-05-08 江苏省电力公司电力科学研究院 Partition power grid bus load prediction system based on weather information
CN103093288B (en) * 2013-02-21 2016-03-30 江苏省电力公司电力科学研究院 Based on the partition power grid bus load prognoses system of weather information
CN103208090A (en) * 2013-04-11 2013-07-17 国网电力科学研究院 Power-cut scheme scheduling scheme optimization method based on overall distribution network
CN103208090B (en) * 2013-04-11 2016-05-04 国网电力科学研究院 Power failure planned dispatching scheme optimization method based on overall distribution
CN105095971A (en) * 2014-05-07 2015-11-25 国网山东省电力公司泰安供电公司 Comprehensive assessment planning method based on power distribution network subareas
CN104392330A (en) * 2014-12-05 2015-03-04 国家电网公司 500 kV/220 kV power grid partitioning strategy evaluation method
CN106451414A (en) * 2016-06-30 2017-02-22 国电南瑞科技股份有限公司 Dynamic partition-based large power grid emergency state control auxiliary decision method
CN106451414B (en) * 2016-06-30 2019-01-25 国电南瑞科技股份有限公司 A kind of bulk power grid emergency state control aid decision-making method based on dynamic partition
CN109659934A (en) * 2018-12-24 2019-04-19 中国电力科学研究院有限公司 New-energy grid-connected based on short circuit current nargin plans preferred method
CN109659934B (en) * 2018-12-24 2021-08-03 中国电力科学研究院有限公司 New energy grid-connected planning optimization method based on short-circuit current margin

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