CN105071385A - Power grid operating data real-time analysis system - Google Patents
Power grid operating data real-time analysis system Download PDFInfo
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Abstract
The invention provides a power grid operating data real-time analysis system which is characterized in that the system forms a forecasting trend according to short-term prediction data of a power grid, and with estimation result of the current operation state of the power grid being combined, carries out comprehensive analysis on the trend of the operation state of the power grid. The power grid operating data real-time analysis system provided in the invention helps scheduling personnel to grasp expected main state change information of the power grid, can effectively increase requirement for responding to the power grid operation control, and guarantees safe and stable operation.
Description
Technical field
The present invention relates to electric network data analysis, particularly a kind of operation of power networks data real-time analyzer.
Background technology
Along with electrical network enters the intelligent digital stage, to raising electrical network controling power, strengthen specialization, lean management proposes requirements at the higher level.Under the propelling of the marketization, the access of extensive renewable new forms of energy make power system operation be in nondeterministic statement more, dispatching of power netwoks operating pressure strengthens, and controlling difficulty increases.Carry out actual time safety stability analysis for current operation, the simulation analysis used time is longer, relatively lags behind in time.Operation of power networks controls the general experience and the paper information inquiry that rely on dispatcher, and along with the lifting of operation of power networks complexity, the service data quantity that management and running need to be grasped gets more and more, and scheduling difficulty promotes.
Summary of the invention
For solving the problem existing for above-mentioned prior art, the present invention proposes a kind of operation of power networks data real-time analyzer, comprising:
This system forms prediction trend according to the prediction data of electrical network short-term, in conjunction with electrical network current operating conditions estimated result, comprehensively analyzes the trend of operation of power networks state.
Preferably, the data analysis that described operation of power networks data analysis system carries out comprises expection trend and generates, status safety is estimated, tendency of changes is analyzed and operational decisions four modules, wherein expect that trend generates according to multibreak power flowcontrol, the basis of Real-time Power Flow data superposes multiple dispatch plan data, form following prediction flow data, status safety estimates the prediction flow data based on future, realize the safety and stability state estimation to expection running status point, trend aggregate analysis estimate safely based on expecting state in analysis conclusion, by definition and the operation Type Control feature of index, judge the safety and stability situation of change of operation of power networks state, operational decisions is for being about to the stable state producing deleterious effects, calculate adjustable strategies, draw auxiliary control decision result.
Preferably, described expection trend generates and forms real-time trending analysis by trend data recombination, faced by described trend data recombination to as if based on plan, prediction operation of power networks type, have employed multibreak load disturbance, while solving electric network swim equation, multiple section power is controlled at assigned address; Adopt real-time generation schedule, short-term load forecasting, generation of electricity by new energy prediction data as one of data source of Load flow calculation, to mate the trend solution of these plans, prediction data, the method Step wise approximation plan that trend recombination data adopts multistep to control, predicted value, i.e. starting point based on real time data, by progressively adjusting generation load, allow the generation load amount in trend solution constantly approach desired value, finally try to achieve the trend solution meeting plan, prediction data;
When being applied to actual electric network and running, search trend data recombination can take following measures:
1) coupling prioritization is carried out to generating, load data, when occurring adjusting or to circulate adjustment in load flow rectification process, abandon the low data matching requirements of part priority and continue to solve, to guarantee the robustness of total algorithm;
2) adopt multibreak power flowcontrol that electrical network is split as multiple minor scale power net and carry out multi-Step Iterations calculating, reduce the diffusion effect of bad data, boosting algorithm is to the adaptive capacity of bad data;
Described tendency of changes analysis carries out digitized description and parsing to operation Type Control, is used, be included in type identification, out-of-limit judgement and Strategy Simulation three aspects by the application of plan security check; Wherein, type identification, based on the running status of current electric grid, requires to mate for the about intrafascicular all kinds of modes of operation, finds the operation constraint entry of its correspondence; The result of out-of-limit basis for estimation type identification, requires to judge to all kinds of power grid control wherein retrained in conjunction with flow data, and the scope of judgement comprises the requirements such as section/line power limit, voltage bound, the constraint of start number of units; Strategy Simulation is according to the result of type identification, in conjunction with the imaginary fault set used in flow data and analytical calculation, judge the security controlling actions situation under each fault condition, the fault actions of simulation calculation is arranged and regenerates, make grid simulation can the action policy of correct simulating Safety control device.
Preferably, wherein above-mentioned Security Checking application aspect, shields the bottom communication technology realized needed for exchanges data and the concrete grammar applying process, supports the transmission of application request message and response results information from transmission; Security Checking service provides information interaction mechanism with the form of interface function, meets inquiry that each application function serve Security Checking, monitoring, location and at the service access of wide scope and shared; The parallel computation service of Security Checking application call operation of power networks data analysis system, realizes with cluster computing resource by standard interface mutual; Parallel computation service support preassignment and dynamic assignment two kinds of modes, amount of calculation dynamic change according to the demand of application of Security Checking, adopts the mode of dynamic assignment; After Security Checking service end receives computation requests, estimate amount of calculation according to Computed-torque control, then determine to the number of servers of this dispensed in conjunction with the priority of calculating and parallel computer group resource, thus support that multi-task parallel calculates; First determined to check section number by calculating cover time section, then carry out a large amount of various safety analyses based on setting fault set for each check section; Security Checking adopts example to walk abreast, and the distribution of computation tasks of high-ranking officers' cross section nuclear Load flow calculation task and safety analysis fault scanning is on each central processing unit core of parallel computer group;
The data inputted in Load flow calculation comprise: electric network model, system loading prediction and bus load prediction, equipment state change plan, generation schedule, interconnection plan, economize total exchange plan and scheduling operation information; The described power flow algorithm based on multibreak is expressed as follows:
P
tie(m)＝Σ
k∈mP
k＝P
sched tie(m)
In formula: P
tie(m) and P
sched tiem () is respectively trend active power and the plan active power of section m, k ∈ m represents all branch roads belonging to section m, P
kfor the branch road active power relevant to section m;
Accurately controlling transregional interconnection and economizing in discontinuity surface trend, according to the actual conditions of each department electrical network, be set as follows 3 kinds of modes and distribute imbalance power;
1) bear imbalance power by appointment generating set, homophony frequency brand-name computer group is set and bears imbalance power with the unit possessing automatic generation control function in unit capacity ratio;
2) imbalance power is born by bus load in the ratio of predicted value;
3) imbalance power is born by the unit of specifying and bus load;
Adopt history similar day trend as the initial value of Load flow calculation iteration, and apply reactive voltage and automatically adjust, to ensure the reasonability of reactive power and voltage's distribiuting in power flow solutions, specifically comprise:
1) reactive power and the voltage initial value of Load flow calculation is obtained from the Data of State Estimation in history similar day corresponding moment;
2) Measures of Reactive Compensation of bonding apparatus state variation Plan rescheduling relevant device, the supporting capacitive reactance device comprising superhigh pressure and extra high voltage line throw move back, the string of long-distance transmission line mend throw move back, the capacitive reactance device of DC converter station and filter throw and move back;
3) for the hub node in operation of power networks type of report, adjustment Measures of Reactive Compensation makes the voltage of hub node in the scope of constraint, other is had to the plant stand of idle regulation measure, rule of thumb setting voltage control objectives curve;
When not restraining appears in trend, adopt following adjustable strategies;
1) with closing on the power flow solutions of period convergence as the Load flow calculation initial value of not restraining the period;
2) when the error of voltage iteration is larger, adjust voltage-controlled target and recalculate; The bound of voltage moved on the whole or moves down 0.01,0.02,0.03, forming the combination of multiple voltage control objectives, utilizing that parallel computing platform is concurrent to be recalculated;
3) when the error of phase angle iteration is larger, adjust the selected strategy of distributed balancing machine, increase unit or bus load shared and to gain merit imbalance power.
The present invention compared to existing technology, has the following advantages:
The present invention proposes a kind of operation of power networks data real-time analyzer, help dispatcher to grasp the principal states situation of change of electrical network expection, effectively can promote its reply operation of power networks demand for control, ensure safety stable operation.
Embodiment
It is hereafter the detailed description to one or more embodiment of the present invention.Describe the present invention in conjunction with such embodiment, but the invention is not restricted to any embodiment.Scope of the present invention is only defined by the claims, and the present invention contain many substitute, amendment and equivalent.Set forth many details in the following description to provide thorough understanding of the present invention.These details are provided for exemplary purposes, and also can realize the present invention according to claims without some in these details or all details.
The present invention proposes operation of power networks data analysis system, prediction data according to electrical network short-term forms prediction trend, in conjunction with electrical network current operating conditions estimated result, overall merit is carried out to the trend of operation of power networks state, remind dispatcher in advance and provide ancillary method suggestion.The data analysis that operation of power networks data analysis system carries out mainly comprises the generation of expection trend, status safety estimation, tendency of changes analysis and operational decisions four technical problems.Wherein tend to data recombination Main Basis multibreak power flowcontrol, the basis of Real-time Power Flow data superposes multiple dispatch plan data, form following prediction flow data, expecting state estimates safely the prediction flow data based on future, realize the safety and stability state estimation to expection running status point, trend aggregate analysis estimate safely based on expecting state in analysis conclusion, by definition and the operation Type Control feature of index, judge the safety and stability situation of change of operation of power networks state, operational decisions is for being about to the stable state producing deleterious effects, calculate adjustable strategies, draw auxiliary control decision result.
The prediction trend formed by trend data recombination is the data basis of real-time trending analysis, and its correctness and robustness determine the overall condition of system cloud gray model.Trend data recombination faced by as if a kind of based on plan, prediction " virtual " operation of power networks type, there is uncertainty to a certain degree.The rudimentary algorithm of trend data recombination have employed multibreak power flowcontrol, and multiple section power can control at assigned address by this algorithm while solution electric network swim equation, and possesses good convergence when calculating electrical network.Adopt the data such as real-time generation schedule, short-term load forecasting, generation of electricity by new energy prediction as one of data source of Load flow calculation, target forms the trend solution of as far as possible mating these plans, prediction data.The method Step wise approximation plan that trend recombination data adopts multistep to control, predicted value, i.e. starting point based on real time data, adopt the thinking of continuous tide, by progressively adjusting generation load, allow the generation load amount in trend solution constantly approach desired value, finally try to achieve the trend solution meeting plan, prediction data.When being applied to actual electric network and running, in order to improve the robustness of trend Load flow calculation, trend data recombination can take following measures.
1) due to the nonlinear characteristic of Load flow calculation, if plan, prediction data cover major part even all generator, loads, the trend solution meeting these data completely will be difficult to find.Thus the present invention is in Practical Project, coupling prioritization is carried out to generating, load data, when occurring adjusting or to circulate adjustment in load flow rectification process, abandon the low data matching requirements of part priority and continue to solve, to guarantee the robustness of total algorithm.
2) actual electric network application is the coordinated operation of multi-stage scheduling, the generation of links bad data is inevitable, the present invention adopts multibreak power flowcontrol that electrical network is split as multiple minor scale power net to carry out multi-Step Iterations calculating, the diffusion effect of effective reduction bad data, boosting algorithm is to the adaptive capacity of bad data.
Run type constraint and safety control strategy based on actual electric network, the present invention proposes the digitlization statement and analytic method that run constraint and safety control strategy.After running Type Control employing digitized description and parsing, can be planned the multiclass application such as Security Checking and use, real-time trending analysis technology also applies this technology in type identification, out-of-limit judgement and Strategy Simulation three.Wherein, type identification, based on the running status of current electric grid, requires to mate for the about intrafascicular all kinds of modes of operation, finds the operation constraint entry of its correspondence.The result of out-of-limit basis for estimation type identification, requires to judge to all kinds of power grid control wherein retrained in conjunction with flow data, and the scope of judgement comprises the requirements such as section/line power limit, voltage bound, the constraint of start number of units.Strategy Simulation is according to the result of type identification, in conjunction with the imaginary fault set used in flow data and analytical calculation, judge the security controlling actions situation under each fault condition, the fault actions of simulation calculation is arranged and regenerates, make grid simulation can the action policy of correct simulating Safety control device.
The basic point of departure of trending analysis is the safe condition (terminal) of safe condition (starting point) by current electric grid and expection electrical network, judges the safety trend of electrical network change during this period of time.For considering of operation of power networks control overflow, available computational resources and current electric grid scale, trending analysis interval computing time is set to 15min.Judgement Main Basis trending analysis conclusion for operation of power networks trend carries out comprehensive descision, according to the division of power system security and unsafe condition, combines with tendency of changes possibility.
Wherein in above-mentioned Security Checking application aspect, the present invention, further combined with the feature of domestic electrical network differentiated control, improves availability and the reasonability of Security Checking.Operation of power networks data analysis system shields the bottom communication technology realized needed for exchanges data and the concrete grammar applying process, supports the transmission of application request message and response results information from transmission.Security Checking service provides information interaction mechanism with the form of interface function, meets inquiry that each application function serve Security Checking, monitoring, location and at the service access of wide scope and shared.
Security Checking calls the parallel computation service of operation of power networks data analysis system, realizes with cluster computing resource mutual by standard interface.Parallel computation service support preassignment and dynamic assignment two kinds of modes, amount of calculation dynamic change according to the demand of application of Security Checking, adopts the mode of dynamic assignment.After Security Checking service end receives computation requests, amount of calculation is estimated according to Computed-torque control, then determine to the number of servers of this dispensed in conjunction with the priority of calculating and parallel computer group resource, thus support that multi-task parallel calculates, give full play to the calculating usefulness of parallel computer group.The amount of calculation of Security Checking is comparatively large, is first determined to check section number by calculating cover time section, then will carry out a large amount of various safety analyses based on setting fault set for each check section.Security Checking adopts example to walk abreast, and the distribution of computation tasks of high-ranking officers' cross section nuclear Load flow calculation task and safety analysis fault scanning is on each central processing unit core of parallel computer group.
The data inputted in Load flow calculation comprise: electric network model, system loading prediction and bus load prediction, equipment state change plan, generation schedule, interconnection plan, economize total exchange plan and scheduling operation information.
United Dispatching, principle of administration by different levels are carried out in domestic operation of power networks, and electrical network at different levels is responsible for adjusting the planning in scope tube and Security Checking.First adjusted by state, divide the fixed transregional interconnection plan of modulation and economize total exchange plan, then determine generation schedule by province's modulation.In plan implementation, by dispatcher and interconnection automatic power control system ensure transregional with province between dominant eigenvalues with plan consistent.Therefore, in Load flow calculation, controlling transregional interconnection and economizing discontinuity surface trend to planned value is guarantee power flow solutions and the close basis of operating condition next day, the amount of unbalance of each region and the inner unscheduled power of province's electrical network being avoided simultaneously to outdiffusion, having crucial meaning to forming good power flow solutions.
The present invention adopts the power flow algorithm based on multibreak surface technology, increases section power Constrained equations based on traditional newton's power flow algorithm.
P
tie(m)＝Σ
k∈mP
k＝P
sched tie(m)
In formula: P
tie(m) and P
sched tiem () is respectively trend active power and the plan active power of section m, k ∈ m represents all branch roads belonging to section m, P
kfor the branch road active power relevant to section m.
Accurately controlling transregional interconnection and economizing in discontinuity surface trend, according to the actual conditions of each department electrical network, 3 kinds of modes can be set as follows and distribute imbalance power.
1) bear imbalance power by appointment generating set, homophony frequency brand-name computer group is generally set and bears imbalance power with the unit possessing automatic generation control function in unit capacity ratio.
2) consider the error that bus load is predicted, bear imbalance power by bus load in the ratio of predicted value.
3) combination of first two mode, bears imbalance power by the unit of specifying and bus load.
For solving the difficult problem lacking reactive power and voltage data, adopt history similar day trend as the initial value of Load flow calculation iteration, and apply reactive voltage automatic adjustment technologies, to ensure the reasonability of reactive power and voltage's distribiuting in power flow solutions, concrete steps are as follows.
1) reactive power and the voltage initial value of Load flow calculation is obtained from the Data of State Estimation in history similar day corresponding moment.
2) Measures of Reactive Compensation of bonding apparatus state variation Plan rescheduling relevant device, the supporting capacitive reactance device comprising superhigh pressure and extra high voltage line throw move back, the string of long-distance transmission line mend throw move back, the capacitive reactance device of DC converter station and filter throw and move back.
3) for the hub node in operation of power networks type of report, adjustment Measures of Reactive Compensation makes the voltage of hub node in the scope of constraint.Other are had to the plant stand of idle regulation measure, rule of thumb setting voltage control objectives curve.Idle regulating measures comprises generator reactive power adjustment and the throwing of capacitive reactance device is moved back.
Due to the complexity of trend, the problem that trend does not restrain is difficult to avoid, and now utilizes corresponding adjustment strategy.
1) with closing on the power flow solutions of period convergence as the Load flow calculation initial value of not restraining the period.Close on the trend of period relatively, the nearer trend initial value of chosen distance convergence point contributes to improving convergence.
2) when the error of voltage iteration Δ U is larger, adjust voltage-controlled target and recalculate.The bound of voltage moved on the whole or moves down 0.01,0.02,0.03, forming the combination of multiple voltage control objectives, utilizing that parallel computing platform is concurrent to be recalculated.
3) when the error of phase angle iteration Δ θ is larger, adjust the selected strategy of distributed balancing machine, increase unit or bus load shared and to gain merit imbalance power.
The prerequisite of trend convergence is rational dispatch plan data, must first check dispatch plan data and verify.For this reason, following Security Checking scheme is proposed.Based on the commercial storehouse synchronous service of operation of power networks data analysis system, state adjusts, point tune, province's tune electrical network at different levels adopt identical the whole network model and identical the whole network dispatch plan data, carry out security and stability analysis by unified trend for the forecast failure within the scope of each self scheduling, then share safety and stability check result.Cause the extraneous stable problem of scheduling by scheduling corrdinated adjustment operation plan at different levels for scheduling scope internal fault, eliminate safe hidden trouble.
Good dispatch plan data quality ensures the rational basis of Security Checking result, must check for this reason, comprise data integrity and logicality to dispatch plan data.Data integrity inspection comprises: whether all kinds of planning data such as generation schedule, load prediction is complete, and whether planning data covers all devices adjusted in scope tube, and whether shaped form data lack data point.Logicality inspection comprises: load prediction maximum, minimum value and the rate of change are no more than certain value, machine unit scheduling plan is not exerted oneself higher than maximum technology, not grid-connected unit can not plannedly be exerted oneself, maintenance scheduling record can not be conflicting, each province is sent out, defeated, electricity consumption planning data meets Constraints of Equilibrium, requires that deviation is within 5%.
ΣP
Gen-P
tie＝ΣP
load+ΣP
loss+ΣP
service
In formula: P
genfor generation schedule, P
loadfor bus load prediction, P
tiefor economizing total exchange plan, P
lossfor network loss, P
servicefor station service.
In the analytic process of operation of power networks data reality, because mass data analysis rule collection scale is large, relevant dimension is high, make the analytical calculation amount on large-scale dataset large, inefficiency.And prior art does not make full use of multiple types of data and concentrates relation between different attribute, be thus difficult to be applied directly in polytype data analysis, directly affects analytical performance.
For the mass data that operation of power networks produces, on the basis of multi-dimensional indexing, introduce the thought of hierarchical index.Consider the characteristic of different types of data collection itself, the Attribute transposition comprised by data set is discontinuous attribute and connection attribute.Consider and the characteristic that operator sharing degree on discontinuous attribute is high propose a kind of two-layer hierarchical index, give index and generate and analyze and matching process.
The present invention proposes the dynamic index that large scale analysis rule calculates on different types of data collection, support the real-time update of analysis rule, its main process comprises index and generates and real-time matching calculating.During generating indexes, first the property set of different types of data collection is classified: connection attribute and discontinuous attribute.Then, according to attribute type, the analysis rule collection of input is divided into different operator set, hierarchical index is generated: generate binary search tree as ground floor index according to the operator on discontinuous attribute based on different operator set, at the second layer, all connection attributes are mapped as hyperspace, and the operator relevant according to continuity attribute generates multi-dimensional indexing.Because the operator on discontinuous attribute is all discrete value, thus the ground floor index generated can quick position on analysis rule, and space expense is also smaller.At the second layer of hierarchical index of the present invention, attribute operator identical for attribute is divided generating indexes according to dimension by the present invention, promotes analysis rule processing speed as much as possible.When analytical calculation is carried out to the data set tuple t arrived in real time, first vector extraction carried out to t and cut out calculating, vector after quantification obtains different operator vectors after the process of operator attributive classification, uses the analysis rule method of hierarchical index of the present invention to filter the analysis rule collection of the condition that is met by two-stage index.
From structure, hierarchical index comprises 3 important component parts and 3 important operations.Wherein, 3 parts respectively: the binary search tree hierarchical index of (1) ground floor, the multidimensional vector hierarchical index of (2) second layer, the contingency table of (3) analysis rule and operator.Based on hierarchical index of the present invention 3 main operations respectively: (1) search for, (2) insert, (3) delete.
Hierarchical index of the present invention is 1 two-layer hierarchical index generally.Ground floor is the binary search tree index generated by discontinuous operator, the second layer is the hyperspace tree that the multidimensional vector corresponding according to consecutive operations symbol generates, other 1 very important part is the contingency table of analysis rule AND operator, has been used for the Rapid Combination of two layer index analysis rule results.
Node in hierarchical index of the present invention can be divided into 3 classes: first floor node top, the intermediate node mid of the second layer and leaf node leaf.
Following element is comprised: attr is the discontinuous attribute that first floor binary search tree node is corresponding in first floor node, value is the discrete value that this binary search tree node is corresponding, weight is the priority of the operator of this node on behalf, and left, right are the left and right child nodes of this node.In intermediate node: branch represents the intermediate node pointer of hyperspace tree structure corresponding to second layer index.In leaf node: mbr is the multidimensional vector that second layer leaf node is corresponding.
Based on hierarchical index of the present invention, propose a kind of feasible index generation method, be divided into 3 steps: regular preliminary treatment, operator set and division and hierarchical index generate.First according to attributive classification, certain division is carried out to pretreated rule set, on this basis again to the data set layering generating indexes after division.
When rule set divides, for pretreated n rule, discontinuous operator set A and consecutive operations symbol set B are divided according to attribute classification and codomain.Wherein:
Σ || A||+||B||=Σ
q ∈ Qp (q), Q are registered analysis rule collection, and q is single analysis rule, and p is operator.Suppose that the operator set tieed up first divides in order to s interval I
1, I
2..., I
s, wherein each interval only has discontinuous operator or consecutive operations symbol.Owing to have passed through pretreated dimension transformation, make I
1, I
2..., I
s, interval in the operator attribute similarity that contains, be convenient to the generation of index by different level.Meanwhile, the rule set that different types of data focuses volume contains precedence information usually, and the priority of rule is higher, represents that the demand of its analyzed calculating is more urgent.When a new analysis rule is registered in system, first analysis rule is divided into discontinuous operator p according to attribute type by pretreatment module by hierarchical index of the present invention
dwith consecutive operations symbol p
c.Then by discontinuous operator p
dbe inserted in the ground floor index of hierarchical index of the present invention, be namely inserted in binary search tree index corresponding to discontinuous attribute, finally consecutive operations accorded with p
cbe inserted in the second layer index of hierarchical index.
When by p
dwhen being inserted into the binary search tree of ground floor, first inserting according to the standard inserted mode of sequence binary tree, but at this moment may violate the heap characteristic of binary search tree, therefore need bottom-up rotation, until heap characteristic is met.Deletion is contrary, first priority is set to minimum, transfers to leaf from top to bottom, then delete.
The second layer insertion method of hierarchical index is roughly: first navigate to the target leaves node that will insert, and the process of location itself is a recursive procedure.Second layer index inserts p
cprocess from the root node of the second layer, in turn according to BFS, search for according to the inclusion relation of hyperspace, after finding a leaf node n, check point number of n.If find to have exceeded branch threshold value M, then directly carry out node split, produce new node, and by existing for n node and P
cvector utilize heuristic strategies to be evenly distributed in two nodes, finally upgrade parent information successively.If a point number of n does not exceed threshold value M, then directly complete update by upgrading father node.
Based on the characteristic of discontinuous operator, the ground floor index binary search tree of hierarchical index of the present invention generates, and the rapid analysis rule accelerating discontinuous operator calculates.Suppose that the priority of empty tree is for infinitely great, then the interpolation above and delet method can correctly process the situation only having a son.The interpolation of ground floor index and the expected time complexity of deletion action are O (logn).
Insertion process sixty-four dollar question is the division strategy of second layer index interior joint.The present invention here adopts heuristic strategies.First all blocks that will divide are taken out.Then two blocks that overlapping area area that is minimum, covering two blocks simultaneously is maximum are selected.Finally remaining piece is incorporated in different nodes successively according to the overlapping difference of area.
Obviously, it should be appreciated by those skilled in the art, above-mentioned of the present invention each module or each step can realize with general computing system, they can concentrate on single computing system, or be distributed on network that multiple computing system forms, alternatively, they can realize with the executable program code of computing system, thus, they can be stored and be performed by computing system within the storage system.Like this, the present invention is not restricted to any specific hardware and software combination.
Should be understood that, above-mentioned embodiment of the present invention only for exemplary illustration or explain principle of the present invention, and is not construed as limiting the invention.Therefore, any amendment made when without departing from the spirit and scope of the present invention, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.In addition, claims of the present invention be intended to contain fall into claims scope and border or this scope and border equivalents in whole change and modification.
Claims (4)
1. an operation of power networks data real-time analyzer, is characterized in that:
This system forms prediction trend according to the prediction data of electrical network short-term, according to electrical network current operating conditions estimated result, comprehensively analyzes the trend of operation of power networks state.
2. system according to claim 1, it is characterized in that, the data analysis that described operation of power networks data analysis system carries out comprises expection trend and generates, status safety is estimated, tendency of changes is analyzed and operational decisions four modules, wherein expect that trend generates according to multibreak power flowcontrol, the basis of Real-time Power Flow data superposes multiple dispatch plan data, form following prediction flow data, status safety estimates the prediction flow data based on future, realize the safety and stability state estimation to expection running status point, trend aggregate analysis estimate safely based on expecting state in analysis conclusion, by definition and the operation Type Control feature of index, judge the safety and stability situation of change of operation of power networks state, operational decisions is for being about to the stable state producing deleterious effects, calculate adjustable strategies, draw auxiliary control decision result.
3. system according to claim 2, it is characterized in that, described expection trend generates and forms real-time trending analysis by trend data recombination, faced by described trend data recombination to as if based on plan, prediction operation of power networks type, adopt multibreak power flowcontrol, while solving electric network swim equation, multiple section power is controlled at assigned address; Adopt real-time generation schedule, short-term load forecasting, generation of electricity by new energy prediction data as one of data source of Load flow calculation, to mate the trend solution of these plans, prediction data, the method Step wise approximation plan that trend recombination data adopts multistep to control, predicted value, i.e. starting point based on real time data, by progressively adjusting generation load, allow the generation load amount in trend solution constantly approach desired value, finally try to achieve the trend solution meeting plan, prediction data;
When being applied to actual electric network and running, search trend data recombination can take following measures:
1) coupling prioritization is carried out to generating, load data, when occurring adjusting or to circulate adjustment in load flow rectification process, abandon the low data matching requirements of part priority and continue to solve, to guarantee the robustness of total algorithm;
2) adopt many control of sections that electrical network is split as multiple minor scale power net and carry out multi-Step Iterations calculating, reduce the diffusion effect of bad data, boosting algorithm is to the adaptive capacity of bad data;
Described tendency of changes analysis carries out digitized description and parsing to operation Type Control, is used, be included in type identification, out-of-limit judgement and Strategy Simulation three aspects by the application of plan security check; Wherein, type identification, based on the running status of current electric grid, requires to mate for the about intrafascicular all kinds of modes of operation, finds the operation constraint entry of its correspondence; The result of out-of-limit basis for estimation type identification, requires to judge to all kinds of power grid control wherein retrained in conjunction with flow data, and the scope of judgement comprises the requirements such as section/line power limit, voltage bound, the constraint of start number of units; Strategy Simulation is according to the result of type identification, in conjunction with the imaginary fault set used in flow data and analytical calculation, judge the security controlling actions situation under each fault condition, the fault actions of simulation calculation is arranged and regenerates, make grid simulation can the action policy of correct simulating Safety control device.
4. system according to claim 3, it is characterized in that, wherein above-mentioned Security Checking application aspect, shields the bottom communication technology realized needed for exchanges data and the concrete grammar applying process, supports the transmission of application request message and response results information from transmission; Security Checking service provides information interaction mechanism with the form of interface function, meets inquiry that each application function serve Security Checking, monitoring, location and at the service access of wide scope and shared; The parallel computation service of Security Checking application call operation of power networks data analysis system, realizes with cluster computing resource by standard interface mutual; Parallel computation service support preassignment and dynamic assignment two kinds of modes, amount of calculation dynamic change according to the demand of application of Security Checking, adopts the mode of dynamic assignment; After Security Checking service end receives computation requests, estimate amount of calculation according to Computed-torque control, then determine to the number of servers of this dispensed in conjunction with the priority of calculating and parallel computer group resource, thus support that multi-task parallel calculates; First determined to check section number by calculating cover time section, then carry out a large amount of various safety analyses based on setting fault set for each check section; Security Checking adopts example to walk abreast, and the distribution of computation tasks of high-ranking officers' cross section nuclear Load flow calculation task and safety analysis fault scanning is on each central processing unit core of parallel computer group;
The data inputted in Load flow calculation comprise: electric network model, system loading prediction and bus load prediction, equipment state change plan, generation schedule, interconnection plan, economize total exchange plan and scheduling operation information; The described power flowcontrol based on multibreak is expressed as follows:
P
tie(m)＝Σ
k∈mP
k＝P
sched tie(m)
In formula: P
tie(m) and P
sched tiem () is respectively trend active power and the plan active power of section m, k ∈ m represents all branch roads belonging to section m, P
kfor the branch road active power relevant to section m;
Accurately controlling transregional interconnection and economizing in discontinuity surface trend, according to the actual conditions of each department electrical network, be set as follows 3 kinds of modes and distribute imbalance power;
1) bear imbalance power by appointment generating set, homophony frequency brand-name computer group is set and bears imbalance power with the unit possessing automatic generation control function in unit capacity ratio;
2) imbalance power is born by bus load in the ratio of predicted value;
3) imbalance power is born by the unit of specifying and bus load;
Adopt history similar day trend as the initial value of Load flow calculation iteration, and apply reactive voltage and automatically adjust, to ensure the reasonability of reactive power and voltage's distribiuting in power flow solutions, specifically comprise:
1) reactive power and the voltage initial value of Load flow calculation is obtained from the Data of State Estimation in history similar day corresponding moment;
2) Measures of Reactive Compensation of bonding apparatus state variation Plan rescheduling relevant device, the supporting capacitive reactance device comprising superhigh pressure and extra high voltage line throw move back, the string of long-distance transmission line mend throw move back, the capacitive reactance device of DC converter station and filter throw and move back;
3) for the hub node in operation of power networks type of report, adjustment Measures of Reactive Compensation makes the voltage of hub node in the scope of constraint, other is had to the plant stand of idle regulation measure, rule of thumb setting voltage control objectives curve;
When not restraining appears in trend, adopt following adjustable strategies;
1) with closing on the power flow solutions of period convergence as the Load flow calculation initial value of not restraining the period;
2) when the error of voltage iteration is larger, adjust voltage-controlled target and recalculate; The bound of voltage moved on the whole or moves down 0.01,0.02,0.03, forming the combination of multiple voltage control objectives, utilizing that parallel computing platform is concurrent to be recalculated;
3) when the error of phase angle iteration is larger, adjust the selected strategy of distributed balancing machine, increase unit or bus load shared and to gain merit imbalance power.
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