CN105335791A - AC/DC large power grid coordinative optimization automatic control method and system - Google Patents
AC/DC large power grid coordinative optimization automatic control method and system Download PDFInfo
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- CN105335791A CN105335791A CN201410384604.0A CN201410384604A CN105335791A CN 105335791 A CN105335791 A CN 105335791A CN 201410384604 A CN201410384604 A CN 201410384604A CN 105335791 A CN105335791 A CN 105335791A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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 discloses an AC/DC large power grid coordinative optimization automatic control method. The method comprises the following steps: judging whether a stable fracture surface is out of limit according to the real-time operation manner of the power grid; starting coordinative optimization automatic control analysis and providing a plan modification decision for manual modification and confirmation; after security checking is passed, automatically sending the decision to the interested parties in a network manner; if the security checking is not passed, re-modifying or selecting a new adjusting scheme; after the interested parties receive the plan adjusting scheme, correspondingly adjusting according to the scheme; and monitoring the adjusting process until the out-of-limit is eliminated or the adjusting process is manually terminated. The invention furthermore discloses an AC/DC large power grid coordinative optimization automatic control system.
Description
Technical field
The present invention relates to dispatching automation of electric power systems technology, particularly relate to a kind of alternating current-direct current bulk power grid coordination optimization autocontrol method and system.
Background technology
Power scheduling commander is the key link ensureing power grid security, high-quality, economy, environmental protection operation.Power scheduling commander has that safety requirements is high, real-time, the feature such as involve a wide range of knowledge, and needs powerful dispatching automation technology support system.
Along with the construction of direct current transportation obtains rapid progress, extensive alternating current-direct current mixed running system occurs.The structure expanding day of alternating current-direct current electrical network, power system operating mode is complicated and changeable, and the difficulty of the dispatching services such as operation monitoring, accident treatment of alternating current-direct current bulk power grid also increases thereupon, brings new challenge to power network safety operation.
The support that existing automation system for the power network dispatching provides to management and running is relatively limited, when showing electrical network generation anomalous event, often lacks aid decision making in thing, recovers control afterwards and is difficult to quick execution.Current scheduling automated system subject matter shows: one is in incident processing procedure, and the characteristic of direct current quick adjustment does not give full play to, and in many situations, direct current does not participate in adjustment; Two is adjustment of power system operating mode is all manually rule of thumb adjust various plan to realize, and Adjusted Option is possible unreasonable, cannot realize the effective process to electrical network exception; Three are Adjusted Option of various plan is all manually be handed down to related side, wastes time and energy.
Summary of the invention
In view of this, the embodiment of the present invention is expected to provide a kind of alternating current-direct current bulk power grid coordination optimization autocontrol method and system, as the aid of accident treatment, provides electrical network to adjust suggestion, can solve when electrical network generation anomalous event, complete the problem of load flow rectification after accident as early as possible.
For achieving the above object, technical scheme of the present invention is achieved in that a kind of alternating current-direct current bulk power grid coordination optimization autocontrol method, and it is characterized in that, described method comprises:
According to the current electric grid method of operation, calculation stability section, judges whether to exceed section limit value, if use coordination optimizing method to carry out out-of-limit correction when occurring out-of-limit, provides amendment plan according to described correction result; Described amendment plan, after checking, is handed down to each related side; Each related side performs described amended plan, until described out-of-limit elimination then adjustment process termination, or adjustment process described in manual termination.
In such scheme, described stable cross section refers to the one group of line set be associated, and this line set works under the specific method of operation, and the trend of this line set always adds the trend of i.e. described stable cross section; Correspondingly, described in judge whether that exceeding section limit value specifically refers to, whether the trend of described stable cross section exceedes section limit value.
In such scheme, the corresponding described method of operation of described section limit value, and according to described method of operation Auto-matching, specifically refer to: judge whether the current method of operation changes, when changing, need to mate new section limit value.
In such scheme, described use coordination optimizing method carries out exporting and/or DC power liking generated power of out-of-limit correction.
In such scheme, described amendment plan specifically refers to: the desired value that described generated power exports and/or DC power will specify the moment to need to reach in future of specifying.
In such scheme, described related side refers to according to plan, to the control system that generator output and DC power adjust.
In such scheme, the described amended plan of described execution, until described out-of-limit elimination specifically refers to: described related side, by performing described amendment plan, changes meritorious output and/or the DC power of generator, thus changing the described method of operation, final elimination is out-of-limit.
The present invention also provides a kind of alternating current-direct current bulk power grid coordination optimization automatic control system in addition, and it is characterized in that, described system comprises: at least one coordination optimization calculation server, at least one workstation and at least one and external system data exchange server; Wherein,
Described coordination optimization calculation server, for completing alternating current-direct current bulk power grid coordination optimization automatic control function;
Described workstation, safeguards and function for monitoring coordination optimization automatic control function for completing;
Described external system data exchange server, for completing the exchanges data with external system; Wherein main exchanges data comprises: with scheduling management information system, energy management system, and network is issued an order system, DC control system; By the exchanges data with described external system, realize gathering real time information and issuing amendment plan function.
In such scheme, described alternating current-direct current cooperation control comprises the cooperation control to generator and/or direct current:
During to generator control, coordination optimizing control system, by the amendment plan of generator, through external system data exchange server, is handed down to described energy management system, by the Automatic Generation Control function of described energy management system, realize the function to generator power adjustment;
During to DC control, coordination optimizing control system, by the amendment plan of direct current, through external system data exchange server, is handed down to DC control system, automatically adjusts DC power by DC control system.
The invention has the beneficial effects as follows: the alternating current-direct current bulk power grid coordination optimization autocontrol method that the embodiment of the present invention provides and system, in the out-of-limit processing procedure of section, adopt the method that alternating current-direct current coordination optimization controls, according to AC and DC operation conditions, reasonable employment direct current quick adjustment characteristic, accelerates electrical network abnormality processing process; When adjusting power system operating mode, adopting electrical network actual operating, unit and direct current practical adjustments characteristic, taking into full account the various operation constraints in operation of power networks process, providing reasonable and available Plan rescheduling scheme; Plan rescheduling scheme carries out Security Checking automatically, is automatically handed down to each related side by network mode, can complete the process of electrical network exception fast.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention one alternating current-direct current bulk power grid coordination optimization autocontrol method schematic flow sheet;
Fig. 2 is the embodiment of the present invention two alternating current-direct current bulk power grid coordination optimization automatic control system data flow diagram;
Fig. 3 is the embodiment of the present invention three alternating current-direct current bulk power grid coordination optimization automatic control system composition structural representation.
Embodiment
In embodiments of the present invention, according to electrical network real time operation mode, calculation stability section, judges whether electrical network occurs out-of-limit.If have out-of-limit, start coordination optimization and automatically control to analyze, and provide decision-making in the mode of amendment plan.The decision-making provided can by manual amendment and confirmation.Last minute planning Adjusted Option, after Security Checking passes through, is handed down to each related side in the mode of network by Plan rescheduling scheme automatically that confirm; Do not pass through if checked, then need to remodify or select new Adjusted Option.Each related side, after receiving Plan rescheduling scheme, starts to carry out corresponding adjustment by scheme, thus changes the current electric grid method of operation.Monitor adjustment process, judge out-of-limit whether elimination, if eliminated, currently adjust successfully; If do not eliminated, need formulate new Plan rescheduling scheme and perform, until out-of-limit elimination or manual termination's adjustment process.
Below in conjunction with drawings and the specific embodiments, the present invention is further described in detail again.
Fig. 1 is the embodiment of the present invention one alternating current-direct current bulk power grid coordination optimization autocontrol method schematic flow sheet, and as shown in Figure 1, described alternating current-direct current bulk power grid coordination optimization autocontrol method comprises:
Step 1: control startup and refer to that alternating current-direct current bulk power grid coordination optimization automatic control system scans by the stable cross section of certain cycle to all definition, calculate its section tidal current, check the out-of-limit situation of section tidal current simultaneously, if it is out-of-limit to there is section, then start respective control function;
Here, described stable cross section refers to the one group of line set be associated, this line set works in the specific method of operation (section condition), the trend of this set always adds (section tidal current) and whether exceeds prescribed limits (section limit value) as the mark judging electrical network whether safe operation, and section limit value changes with the change of the method for operation (limit value condition).
The state of stable cross section comprises two aspects: one is the validity of reflection stable cross section, is divided into effective status (this stable cross section is applicable to the current method of operation), disarmed state (this stable cross section and the current method of operation incompatible); Two is the flow state reflecting stable cross section, is divided into out-of-limit, critical out-of-limit, safety three states.
Section limit value manually can be set by yardman, also can according to power system operating mode Auto-matching.Whether corresponding with current control limit the method for operation after accident mode be consistent, inconsistent, thinks and there occurs change, needs to mate new section limit value.
After power system operating mode changes, automatically select effective stable cross section and corresponding section limit value, and monitor the trend of this stable cross section in real time.
According to stable cross section monitoring result, judge that whether stable cross section is out-of-limit, as the criterion starting respective control function.
Step 2: coordination optimization calculates and refers under certain control objectives, arranging again by control variable, and after making adjustment, the running status of system meets various security constraints;
Here, control objectives refers to the optimization principles that coordination optimization calculates.Different optimization principles can cause different optimum results.Possible optimization principles comprises: 1, adjust adjustment expense under; 2, minimum on sending powered impact; 3, regulate the speed the fastest; 4, regulated quantity is adjusted minimum.
Here, control variable refers to the adjustable means participating in controlling, and by the adjustment to control variable, can change the method for operation of electrical network.The actual electric network control object corresponding with control variable mainly generator and straight-flow system.
Concrete control variable arranges to refer to the active power changing generator and straight-flow system again, by the power of the active power and straight-flow system that reduce or increase some generator, change the trend distribution pattern of electrical network, change Branch Power Flow, and then change the trend of stable cross section.
Here, security constraints refers to control variable again in scheduling processes, the physical constraint that electric network element and the method for operation must be observed.Electric network swim distribution must meet trend balance equation, and the active power that generator increases or reduces must meet limit value constraint.
Calculate coordination optimization, key is the limit value constraint of stable cross section.If the method for operation of system meets various security constraints after adjustment, namely meet the limit value constraint of stable cross section, thus before making adjustment, out-of-limit stable cross section reruns in section limits.This control is eliminate out-of-limit adjustment, is a kind of Corrective control.
Coordination optimization controls adjustment generator and direct current.Wherein, the adjustment of generator directly changes power system operating mode, and the adjustment of direct current indirectly changes power system operating mode by changing direct current from exchanging the AC power obtained.The adjustable speed of direct current is fast, and adjustable range is large, but has higher adjustment expense.The Controlling principle of alternating current-direct current cooperation control has larger impact to alternating current-direct current cooperation control.
Step 3: control program is selected to refer to and carried out artificial selection to which kind of control program of employing, and to choosing the manual amendment of control program.
Here, described control program refers under certain control objectives, according to given control variable and given power constraint condition, after carrying out coordination optimization calculating, and the correction calculation result drawn.
Control program is made up of the plan participating in generator and the direct current regulated.Wherein plan is the desired value that the control variable of specifying will specify the moment to need to reach in future.
Concrete, each control program gives the adjustment situation of each unit output and the adjustment situation of straight-flow system, gives target function value simultaneously.
For each control program, provide and participate in currently the exerting oneself of adjustment unit, target is exerted oneself, regulate bound, regulations speed etc. to control unit information, whether direct current participates in adjusting and meritorious before and after adjustment being exerted oneself, the trend of each stable cross section after scheme performs.
Artificial selected control program is current feedback control scheme, can carry out manual amendment to current feedback control scheme.
Step 4: control program check be to manual amendment after control program verify, the out-of-limit situation of selective analysis stable cross section under this plan.If do not have section out-of-limit, control program is effective;
Here, plan was checked for the plan modification moment, had revised and unmodified various plans in conjunction with this moment, generated the operation of power networks section needing to check.
Further, plan is checked and is waited that checking operation of power networks section carries out tidal current analysis to what generate, calculate electrical network distributing to lower trend of working out a scheme, whether the out-of-limit situation of selective analysis stable cross section, provide amended plan and can impact safe operation of electric network.
Do not pass through if plan is checked, then need to get back to step 3, manually reselect or change control scheme, and then check, until there is no the appearance of the out-of-limit situation of stable cross section.
Step 5: control program issues and refers to that control program is after artificial selection and amendment, is handed down to the process of each related side by control program;
Here, control program refers to the plan modification scheme of generator, direct current.
Here, related side refers to according to plan, generator output and DC power is carried out to the control system of corresponding adjustment.
Concrete, the adjustment of generator output is completed by automatic electricity generation control system; The adjustment meritorious to direct current is completed by DC control system.
Issuing of control program can be automatic, also can be artificial.
Step 6: control program performs and refers to that each related side participating in adjustment carries out the process adjusted according to the control program received;
Here, adjustment process is undertaken by the control cycle of specifying.In coordination optimization computation process, considered the factor such as regulations speed and regulating time of control variable, therefore each control cycle, the adjustment amount of control variable is the actual adjustable value in this cycle.
In control procedure, monitor the out-of-limit situation of stable cross section, if no longer out-of-limit, proceed to and control termination link, to terminate whole control procedure.If after control cycle arrives, out-of-limitly to eliminate not yet, then need to re-issue the control that control command carries out a new round.
Here, the control program of a new round can complete through manual amendment based on the control program of last time; Also based on the power system operating mode of current reality, analysis can be re-started, generate new control program, and select in new control program and revise, generate Plan rescheduling scheme.
Repeat said process, until the out-of-limit elimination of electrical network
Step 7: control termination and refer to that part or all of control object finishing control scheme performs flow process;
Here, control termination and comprise two kinds of situations: one is that stable cross section is out-of-limit eliminates, the control of whole control object that terminates; Two is that stable cross section is out-of-limit does not eliminate, but must shift to an earlier date the control of teste control object as required;
Concrete, stable cross section is out-of-limit to be eliminated, the control of whole control object that terminates.Control object is recovered in the original plan (not adjusting its plan), no longer controls it, until restart control.
Concrete, stable cross section is out-of-limit not to be eliminated, but must shift to an earlier date the control of teste control object as required.By the controlled device manually determining to need to stop, regenerating in new control program process, these are not participated in coordination optimization by the control object of manual termination and calculate.
Fig. 2 is the embodiment of the present invention two alternating current-direct current bulk power grid coordination optimization automatic control system data flow diagram, as shown in Figure 2, and described alternating current-direct current bulk power grid coordination optimization automatic control system data stream:
Described coordination optimizing control system, for completing alternating current-direct current bulk power grid coordination optimization automatic control function.
Described energy management system (EMS), for completing real-time data of power grid collection, electric network model is safeguarded and electrical network analysis application function.EMS also realizes the functions such as generator plan issues, generator power regulates automatically simultaneously.
Described scheduling management information system (DMIS), for completing the daily information management function of scheduling.Comprise the management of section limit value, various plan, daily record etc.DMIS also realizes the function such as Information issued and displaying simultaneously.
Described DC control system, for completing the controlling functions to straight-flow system.DC power is adjusted by DC control system.
Described network is issued an order system, issues, realize network command function for the networking completing traffic order.
Concrete, coordination optimizing control system obtains real-time data of power grid, electric network model, various adjustment limit value information etc. from EMS, completes controlling calculation function according to these information.
Coordination optimizing control system obtains the various plans of stable cross section limit value and generator and direct current from DMIS.According to coordination optimization controlling calculation result, original generator and direct current plan are modified, form final plan modification control program.
Coordination optimizing control system, by the control program of generator, is handed down to EMS, by the automatic generator controlling functions of EMS, realizes the function to generator power adjustment.
Coordination optimizing control system, by the control program of direct current, is handed down to DC control system, automatically adjusts DC power by DC control system.
Coordination optimizing control system, by traffic order, is handed down to network and issues an order system, is issued an order to relevant generating plant, direct current station etc., realize power adjustment functions by network.
Plan rescheduling scheme is supplied to DMIS by coordination optimizing control system, and the Information issued of adjustment of hitting the target, these information arrive by network inquiry.
Coordination optimizing control system, when carrying out mutual with other system, needs the various information to system returns confirm and verify, and improves the security of operation.
Fig. 3 is the embodiment of the present invention three alternating current-direct current bulk power grid coordination optimization automatic control system composition structural representation, as shown in Figure 3, described alternating current-direct current bulk power grid coordination optimization automatic control system comprises: the server of at least one coordination optimization calculation server, at least one workstation and at least one and external system exchanges data; Wherein,
Described coordination optimization calculation server, for completing alternating current-direct current bulk power grid coordination optimization automatic control function.It obtains the various data needed for calculating by external system data exchange server, result of calculation is issued by external system data exchange server, realizes controlling.
Described workstation, to safeguard coordination optimization automatic control function and the function such as supervision for completing.
Described external system data exchange server, for completing the exchanges data with external system.Wherein main exchanges data comprises: with scheduling management information system (DMIS), energy management system (EMS), and network is issued an order system, DC control system.By the exchanges data with these external systems, realize gathering real time information and issuing the functions such as control command;
Further, for improving system reliability, described control system adopts the building form of two net, two server usually, host work under normal circumstances, standby host is in waiting status, and whether standby host detects host work automatically normal, just automatically switches to standby host once detect that main frame does not work;
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (9)
1. an alternating current-direct current bulk power grid coordination optimization autocontrol method, is characterized in that, described method comprises:
According to the current electric grid method of operation, calculation stability section, judges whether to exceed section limit value, if use coordination optimizing method to carry out out-of-limit correction when occurring out-of-limit, provides amendment plan according to described correction result; Described amendment plan, after checking, is handed down to each related side; Each related side performs described amended plan, until described out-of-limit elimination then adjustment process termination, or adjustment process described in manual termination.
2. method according to claim 1, it is characterized in that, described stable cross section refers to the one group of line set be associated, and this line set works under the specific method of operation, and the trend of this line set always adds the trend of i.e. described stable cross section; Correspondingly, described in judge whether that exceeding section limit value specifically refers to, whether the trend of described stable cross section exceedes section limit value.
3. method according to claim 2, is characterized in that, the corresponding described method of operation of described section limit value, and according to described method of operation Auto-matching, specifically refers to: judge whether the current method of operation changes, and when changing, needs to mate new section limit value.
4. method according to claim 1, is characterized in that, described use coordination optimizing method carry out out-of-limit correction to as if generated power export and/or DC power.
5. method according to claim 4, is characterized in that, described amendment plan specifically refers to: the desired value that the described generated power output of specifying and/or DC power will specify the moment to need to reach in future.
6. method according to claim 1, it is characterized in that, described related side refers to according to plan, to the control system that generator output and DC power adjust.
7. method according to claim 4, it is characterized in that, the described amended plan of described execution, until described out-of-limit elimination specifically refers to: described related side is by performing described amendment plan, change meritorious output and/or the DC power of generator, thus changing the described method of operation, final elimination is out-of-limit.
8. an alternating current-direct current bulk power grid coordination optimization automatic control system, is characterized in that, described system comprises: at least one coordination optimization calculation server, at least one workstation and at least one and external system data exchange server; Wherein,
Described coordination optimization calculation server, for completing alternating current-direct current bulk power grid coordination optimization automatic control function;
Described workstation, safeguards and function for monitoring coordination optimization automatic control function for completing;
Described external system data exchange server, for completing the exchanges data with external system; Wherein main exchanges data comprises: with scheduling management information system, energy management system, and network is issued an order system, DC control system; By the exchanges data with described external system, realize gathering real time information and issuing amendment plan function.
9. system according to claim 8, it is characterized in that, described alternating current-direct current cooperation control comprises the cooperation control to generator and/or direct current:
During to generator control, coordination optimizing control system, by the amendment plan of generator, through external system data exchange server, is handed down to described energy management system, by the Automatic Generation Control function of described energy management system, realize the function to generator power adjustment;
During to DC control, coordination optimizing control system, by the amendment plan of direct current, through external system data exchange server, is handed down to DC control system, automatically adjusts DC power by DC control system.
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