CN101728829A - Electric network active and reactive comprehensive security control system - Google Patents
Electric network active and reactive comprehensive security control system Download PDFInfo
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- CN101728829A CN101728829A CN200910311326A CN200910311326A CN101728829A CN 101728829 A CN101728829 A CN 101728829A CN 200910311326 A CN200910311326 A CN 200910311326A CN 200910311326 A CN200910311326 A CN 200910311326A CN 101728829 A CN101728829 A CN 101728829A
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Abstract
The invention relates to an electric network active and reactive comprehensive security control system in the technical field of electric power, which comprises a data interface module, a basic algorithm module and a comprehensive correction scheme computing module, wherein the data interface module is connected with a dispatch automated system to receive an electric network implementation status, the data interface module is connected with the basic algorithm module to output a status data file, a basic computation and analysis tool and the status data file are output to the comprehensive correction scheme computing module by the basic algorithm module, and the comprehensive correction scheme computing module adjusts the tide current of an off-limit line by using the active and reactive power output by a generator as variables. The invention describes through utilizing a branch current model of an electric power network, so originally split rearrangement problems are unified again, thereby solving the problem of branch tide current limitation breaking, and providing a more credible guide for electric network operation decision making.
Description
Technical field
What the present invention relates to is the control system in a kind of power technology field, specifically is a kind of electric network active and reactive comprehensive security control system.
Background technology
The correction control of electric power system is one of important content of power system security monitoring, when system exists the meritorious trend of circuit out-of-limit, generally take to adjust the mode of unit output (also taking cutting load sometimes), it is out-of-limit to eliminate circuit, and this situation is exactly that meritorious economic security is proofreaied and correct; When system exist reactive power flow out-of-limit with busbar voltage when out-of-limit, take generally to adjust that unit is idlely exerted oneself, the mode of the tap of the tap of shunt capacitance or reactor, transformer, it is out-of-limit to eliminate circuit, this situation is exactly that idle economic security is proofreaied and correct.Thisly become the complete PROBLEM DECOMPOSITION of arranging again active power to arrange again to arrange the method for two subproblems in most of the cases can satisfy the requirement that power system security is proofreaied and correct again with reactive power, but there is obvious defects in it: succinct in order to calculate, and adopt the decoupling type of P-θ and Q-V to certainly exist the low problem of computational accuracy; Assumed condition is unreasonable, and the branch road trend is sunken more not merely to be meritorious or idle one-side influence, should take all factors into consideration; Particularly for generator, conciliation is meritorious separately may surpass its thermally-stabilised limit with reactive power, makes control strategy be difficult to carry out.In fact, why take above-mentioned method of separately proofreading and correct, also having an important reasons is that the out-of-limit constraints of trend that the meritorious idle safety of tradition is proofreaied and correct can't be unified.
Find through literature search prior art, Wu Jishun, Hou Zhijian is respectively in " Automation of Electric Systems " in January, 1985 and in January, 1994, delivered " power system reactive power safety is proofreaied and correct countermeasure ", " find the solution active power security with the linear programming technique of upper and lower bound variable and proofread and correct problem " two pieces of articles, correlative study has been carried out in meritorious and idle safety correction to electric power system, article adopts linear programming technique (LP) to find the solution this problem, the convergence difficulty that is occurred in the time of can avoiding adopting some Nonlinear Programming Algorithm, and tool has enough precision.But article has idlely carried out full decoupledly to meritorious, and assumed condition is too desirable, and in order to obtain more high-precision separating, also needs to carry out once conventional AC power flow and calculate, and has increased amount of calculation and computing time.Now also not about document and patent meritorious and reactive comprehensive safety correction aspect.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of electric network active and reactive comprehensive security control system are provided, be described by the branch current model that utilizes electric power networks, thereby the arrangement problem again of originally isolating is reunified, solve the out-of-limit problem of branch road trend, for the operation of power networks decision-making provides more believable guidance.
The present invention is achieved by the following technical solutions, the present invention includes: data interface module, basic algorithm module and integrated calibration computation schemes module, wherein: data interface module is connected with dispatch automated system and implements state to receive electrical network, data interface module is connected with the output state data file with the basic algorithm module, the basic algorithm module exports basic calculating analysis tool and status data file to integrated calibration computation schemes module, and integrated calibration computation schemes module is that variable is adjusted the trend of out-of-limit circuit with the meritorious and reactive power of generator output.
Described data interface module comprises: input and output submodule, device parameter and the attribute of file data is provided with submodule and trend is out-of-limit and the scheme of adjustment result queries submodule, wherein: device parameter is provided with submodule with attribute and is connected with the input and output submodule of file data with transmission electric network data fileinfo and device attribute parameter, and trend is out-of-limit to be connected with the input and output submodule of file data and transmission data file with the scheme of adjustment result queries submodule.
The input and output submodule of described file data receives electrical network enforcement state from the front end processor of dispatch automated system, the message format that electrical network is implemented state is identical with message format and the agreement that agreement and dispatch automated system are adopted, and result of calculation outputed in the status data file, in order to dispatcher's inquiry with browse.
Described device parameter and attribute are provided with submodule and allow the user that the electric network data fileinfo and the device attribute parameter of reading in is provided with and revises by human-computer interaction interface, and amended electric network data fileinfo and device attribute parameter are deposited in the status data file.
Described trend is out-of-limit and adjust scheme result queries submodule by calling out-of-limit situation of trend and the adjustment scheme in the status data file, the form of various Calculation results with list is shown, thereby inquire about.
Described basic algorithm module comprises: trend calculating sub module, node voltage-branch current hybrid modeling submodule and linear programming calculating sub module, wherein: be connected with the accepting state data file with data structure block after the input parallel connection of trend calculating sub module, node voltage-branch current hybrid modeling submodule and linear programming calculating sub module, be connected with outlet line trend, sensitivity matrix, basic calculating analysis tool and status data file with integrated calibration computation schemes module after the output parallel connection of above-mentioned submodule.
Described trend calculating sub module adopts Newton method, PQ decoupling method or DC power flow method according to the status data file, uses branch road division, node numbering optimization, sparse storage and quick former generation back substitution method to calculate the circuit trend of electric power system.。
Described node voltage-branch current hybrid modeling submodule generate after according to the electric power networks equation linearisation in the status data file branch current at generator meritorious and idle sensitivity matrix, thereby will gain merit and idle safety is proofreaied and correct question synthesis and considered together.
After described linear programming calculating sub module is reached the linear programming problem of standard with the meritorious idle security constraint issue table in the status data file, adopt the linear programming algorithm to find the solution and draw the status data file.
Described integrated calibration computation schemes module is carried out trend calculating and according to the out-of-limit judgement of trend circuit trend and sensitivity matrix is returned the calculating that the basic algorithm module is adjusted scheme current system according to the basic calculating analysis tool and the status data file of basic algorithm module output.
The course of work of the present invention is as follows: the file data interface sub-module is read in data file (being transmitted by dispatch automated system) and is calculated required data, and deposit it in data file, according to user's needs can the invocation facility parameter and attribute submodule is set the system and the facility information that read in is made amendment, and it can be preserved in order to calling.Integrated calibration computation schemes module is then utilized the every data in the data file, call each submodule in the basic algorithm module respectively, calculate the present trend of system, and calculate the adjustment scheme according to the out-of-limit situation of trend, and can deposit scheme in data file, call at any time for the user.
Compared with prior art, the present invention has following beneficial effect: the meritorious and idle safety correction of generator is unified, reach that electric power system is meritorious to be carried out comprehensive safety with reactive power flow and proofread and correct comprehensive purpose, and reduced the assumed condition that original safety is proofreaied and correct.Active power security is in the past proofreaied and correct the reactive power of hypothesis generator and is determined, idle safety is proofreaied and correct meritorious the exerting oneself of hypothesis generator and is determined, with the degree of coupling between meritorious-circuit trend and the idle-node voltage is 5% calculating, and the present invention will make accuracy in computation improve 5%; And because take into account meritorious and idle the exerting oneself of generator simultaneously, the phenomenon of avoiding generator output to surpass its safety margins takes place, and also makes final scheme not need to adjust again, and is more feasible.The present invention can provide the scheme that safety is proofreaied and correct efficiently, and computational accuracy meets the demands, and the correcting scheme that provides has important directive function for the safe operation of electrical network.
Description of drawings
The interface schematic diagram of Fig. 1 the present invention and dispatch automated system.
Fig. 2 calculation flow chart of the present invention.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises: data interface module, basic algorithm module and integrated calibration computation schemes module, wherein: data interface module is connected with dispatch automated system and implements state to receive electrical network, data interface module is connected with the output state data file with the basic algorithm module, the basic algorithm module exports basic calculating analysis tool and status data file to integrated calibration computation schemes module, and integrated calibration computation schemes module is that variable is adjusted the trend of out-of-limit circuit with the meritorious and reactive power of generator output.
Described data interface module comprises: input and output submodule, device parameter and the attribute of file data is provided with submodule and trend is out-of-limit and the scheme of adjustment result queries submodule, wherein: device parameter is provided with submodule with attribute and is connected with the input and output submodule of file data with transmission electric network data fileinfo and device attribute parameter, and trend is out-of-limit to be connected with the input and output submodule of file data and transmission data file with the scheme of adjustment result queries submodule.
The input and output submodule of described file data receives electrical network enforcement state from the front end processor of dispatch automated system, the message format that electrical network is implemented state is identical with message format and the agreement that agreement and dispatch automated system are adopted, and result of calculation outputed in the status data file, in order to dispatcher's inquiry with browse.
Described device parameter and attribute are provided with submodule and allow the user that the electric network data fileinfo and the device attribute parameter of reading in is provided with and revises by human-computer interaction interface, and amended electric network data fileinfo and device attribute parameter are deposited in the status data file.
Described trend is out-of-limit and adjust scheme result queries submodule by calling out-of-limit situation of trend and the adjustment scheme in the status data file, the form of various Calculation results with list is shown, thereby inquire about.
Described basic algorithm module comprises: trend calculating sub module, node voltage-branch current hybrid modeling submodule and linear programming calculating sub module, wherein: be connected with the accepting state data file with data structure block after the input parallel connection of trend calculating sub module, node voltage-branch current hybrid modeling submodule and linear programming calculating sub module, be connected with output basic calculating analysis tool and status data file with integrated calibration computation schemes module after the output parallel connection of above-mentioned submodule.
Described trend calculating sub module adopts Newton method, PQ decoupling method or DC power flow method according to the status data file, uses branch road division, node numbering optimization, sparse storage and quick former generation back substitution method to calculate the circuit trend of electric power system.。
Described node voltage-branch current hybrid modeling submodule generate after according to the electric power networks equation linearisation in the status data file branch current at generator meritorious and idle sensitivity matrix expression formula, thereby will gain merit and idle safety is proofreaied and correct question synthesis and considered together.
Described linear programming calculating sub module is after meritorious idle security constraint issue table is reached the linear programming problem of standard, adopts the linear programming algorithm to find the solution, and the linear programming submodule adopts card agate chucking method to calculate; The target function of this linear programming is: adopt the meritorious cost of electricity-generating and the idle controlled member of incremental model to depart from the minimum sum minimum of initial launch state; Equality constraint is to disregard under the situation of network loss and load variations, and each generating set total increment of exerting oneself is 0; Inequality constraints comprises generator meritorious idle upper limit constraint, the constraint of economize on electricity voltage and the branch road trend constraint of representing with electric current.Wherein, by the introducing of branch current, be Mathematical Modeling with the comprehensive safety problem description, be unified in idle security constraints meritorious.
Described integrated calibration computation schemes module is at first called the trend calculating sub module in the basic algorithm module, current system is carried out trend calculate, if it is out-of-limit that trend does not take place, does not then carry out the calculating of safe correcting scheme; If it is out-of-limit that trend takes place, node voltage-branch current hybrid analysis submodule formation circuit the trend and the generator that then call in the basic algorithm module are gained merit and idle sensitivity matrix, call the linear programming calculating sub module again and adjust the calculating of scheme, and deposit result of calculation in data file.
The present embodiment course of work is as follows: the file data interface sub-module is read in data file (being transmitted by dispatch automated system) and is calculated required data, and deposit it in data file, according to user's needs can the invocation facility parameter and attribute submodule is set the system and the facility information that read in is made amendment, and it can be preserved in order to calling.Integrated calibration computation schemes module is then utilized the every data in the data file, call each submodule in the basic algorithm module respectively, calculate the present trend of system, and calculate the adjustment scheme according to the out-of-limit situation of trend, and can deposit scheme in data file, call at any time for the user.
As shown in Figure 2, integrated calibration computation schemes module is utilized the every data in the data file, calls each submodule in the basic algorithm module respectively, calculate the present trend of system, and according to the out-of-limit situation calculating of trend adjustment scheme, and can deposit scheme in data file, call at any time for the user.It is out-of-limit that the present invention judges according to line current whether system load flow exists, and criterion is according to the circuit rated current of circuit nameplate parameter mark, also can be defined voluntarily by the user.The adjustment scheme comprises the meritorious adjustment amount and the idle adjustment amount of exerting oneself of exerting oneself of generating set.
After the integrated calibration computing module starts,, call the node voltage-branch current hybrid analysis module and the trend computing module of basic calculation module, generate sensitivity matrix, Δ I=A is arranged for the present invention at first according to the data that read
11Δ P+A
12Δ Q, wherein A
11, A
12Be the sensitivity matrix of system.The calculating of sensitivity matrix and the structure of system and equipment and line parameter circuit value are relevant.When existing trend to get over the branch road of line according to calculation of tidal current judgement system, note these electric currents and get over the branch number of line, calculate the line percentage more of branch road, its computational methods are: get over line percentage=(branch current actual value-branch current rated value)/branch current rated value.Linear programming (LP) problem set is put in the trend constraint of getting over the branch road of line percentage maximum.Linear programming (LP) problem set comprises a target function and some equality constraints and inequality constraints, according to these constraints, and the optimal solution of ferret out function in the feasible zone scope.According to calculation process shown in Figure 2, calculate meritorious reactive comprehensive safety correcting scheme.Usually, after more the branch road processing of line maximum finishes, the fail safe of system will make moderate progress, and the above step that circulates then is not till there is more the line branch road in system.Do not have when separating when system does not exist more line branch road or system prompt LP problem, safety is proofreaied and correct and is finished.
The trend computing module that calls the basic algorithm module at last carries out a trend and calculates, and with the result who confirms that safety is proofreaied and correct, and safe correcting scheme is write data file.According to the needs to computational accuracy and computing time, the user can select to carry out in which way trend and calculate, and comprises Newton method, PQ decoupling method and DC power flow method.Nameplate parameter mark according to circuit is judged the result that safety is proofreaied and correct.
Claims (10)
1. electric network active and reactive comprehensive security control system, it is characterized in that, comprise: data interface module, basic algorithm module and integrated calibration computation schemes module, wherein: data interface module is connected with dispatch automated system and implements state to receive electrical network, data interface module is connected with the output state data file with the basic algorithm module, the basic algorithm module exports basic calculating analysis tool and status data file to integrated calibration computation schemes module, and integrated calibration computation schemes module is that variable is adjusted the trend of out-of-limit circuit with the meritorious and reactive power of generator output.
2. electric network active according to claim 1 and reactive comprehensive security control system, it is characterized in that, described data interface module comprises: the input and output submodule of file data, device parameter and attribute are provided with submodule and trend is out-of-limit and the scheme of adjustment result queries submodule, wherein: device parameter is provided with submodule with attribute and is connected with the input and output submodule of file data with transmission electric network data fileinfo and device attribute parameter, and trend is out-of-limit to be connected with the input and output submodule of file data and transmission data file with the scheme of adjustment result queries submodule.
3. electric network active according to claim 2 and reactive comprehensive security control system, it is characterized in that, the input and output submodule of described file data receives electrical network enforcement state from the front end processor of dispatch automated system, the message format that electrical network is implemented state is identical with message format and the agreement that agreement and dispatch automated system are adopted, and result of calculation is outputed in the status data file.
4. electric network active according to claim 2 and reactive comprehensive security control system, it is characterized in that, described device parameter and attribute are provided with submodule and allow the user that the electric network data fileinfo and the device attribute parameter of reading in is provided with and revises by human-computer interaction interface, and amended electric network data fileinfo and device attribute parameter are deposited in the status data file.
5. electric network active according to claim 2 and reactive comprehensive security control system, it is characterized in that, described trend is out-of-limit and adjust scheme result queries submodule by calling out-of-limit situation of trend and the adjustment scheme in the status data file, and the form of various Calculation results with list shown.
6. electric network active according to claim 1 and reactive comprehensive security control system, it is characterized in that, described basic algorithm module comprises: the trend calculating sub module, node voltage branch current hybrid modeling submodule and linear programming calculating sub module, wherein: the trend calculating sub module, be connected with the accepting state data file with data structure block after the input parallel connection of node voltage branch current hybrid modeling submodule and linear programming calculating sub module, be connected with the outlet line trend with integrated calibration computation schemes module after the output parallel connection of above-mentioned submodule, sensitivity matrix, basic calculating analysis tool and status data file.
7. electric network active according to claim 6 and reactive comprehensive security control system, it is characterized in that, described trend calculating sub module adopts Newton method, PQ decoupling method or DC power flow method according to the status data file, uses branch road division, node numbering optimization, sparse storage and quick former generation back substitution method to calculate the circuit trend of electric power system.
8. electric network active according to claim 6 and reactive comprehensive security control system, it is characterized in that, described node voltage branch current hybrid modeling submodule generate after according to the electric power networks equation linearisation in the status data file branch current at generator meritorious and idle sensitivity matrix.
9. electric network active according to claim 6 and reactive comprehensive security control system, it is characterized in that, after described linear programming calculating sub module is reached the linear programming problem of standard with the meritorious idle security constraint issue table in the status data file, adopt the linear programming algorithm to find the solution and draw the status data file.
10. electric network active according to claim 1 and reactive comprehensive security control system, it is characterized in that described integrated calibration computation schemes module is carried out trend calculating and according to the out-of-limit judgement of trend circuit trend and sensitivity matrix returned the calculating that the basic algorithm module is adjusted scheme current system according to the basic calculating analysis tool and the status data file of basic algorithm module output.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102253652A (en) * | 2011-07-25 | 2011-11-23 | 中国神华能源股份有限公司 | Safety monitoring method for steam turbogenerator |
| CN103036245A (en) * | 2012-11-30 | 2013-04-10 | 中国南方电网有限责任公司 | Novel transmission loss reducing method by alternating current or direct current (AC / DC) synergy used in interconnected network and novel transmission loss reducing system by AC / DC synergy used in interconnected network |
| CN103150686A (en) * | 2013-02-06 | 2013-06-12 | 中国电力科学研究院 | Network and province integrated plan establishment method based on distributed preprocessing and hierarchical coordination |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100550569C (en) * | 2007-06-22 | 2009-10-14 | 泰州苏源科电有限公司 | 10kV and following power distribution network reactive Voltage Optimum progress control method and system |
| CN101232182A (en) * | 2008-01-18 | 2008-07-30 | 清华大学 | Three-dimensional coordinated electric network energy managing system and method for controlling and evaluating electric network |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102253652A (en) * | 2011-07-25 | 2011-11-23 | 中国神华能源股份有限公司 | Safety monitoring method for steam turbogenerator |
| CN103036245A (en) * | 2012-11-30 | 2013-04-10 | 中国南方电网有限责任公司 | Novel transmission loss reducing method by alternating current or direct current (AC / DC) synergy used in interconnected network and novel transmission loss reducing system by AC / DC synergy used in interconnected network |
| CN103036245B (en) * | 2012-11-30 | 2016-08-03 | 中国南方电网有限责任公司 | A kind of interconnected network Novel AC-DC works in coordination with the method and system reducing network loss |
| CN103150686A (en) * | 2013-02-06 | 2013-06-12 | 中国电力科学研究院 | Network and province integrated plan establishment method based on distributed preprocessing and hierarchical coordination |
| CN103150686B (en) * | 2013-02-06 | 2017-02-08 | 中国电力科学研究院 | Network and province integrated plan establishment method based on distributed preprocessing and hierarchical coordination |
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