CN114336634B - Power flow calculation method, device and equipment of power grid system - Google Patents
Power flow calculation method, device and equipment of power grid system Download PDFInfo
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Abstract
The invention discloses a power flow calculation method, a device and equipment of a power grid system, wherein the method comprises the following steps: responding to a selection instruction input by any client, and selecting a target power flow calculation type from a plurality of preset power flow calculation types; obtaining corresponding input data according to the target power flow calculation type; carrying out power flow calculation by adopting input data to generate a power flow calculation result; and returning the power flow calculation result to the client, and adjusting and optimizing the power grid system according to the power flow calculation result through the client. Therefore, the adjustment and optimization of the power grid system are more efficiently and flexibly realized through diversified power flow calculation.
Description
Technical Field
The present invention relates to the field of power grid system optimization technologies, and in particular, to a method, an apparatus, and a device for power flow calculation of a power grid system.
Background
The power grid system is an electric energy production and consumption system composed of links such as a power plant, a power transmission and transformation line, a power supply and distribution station, electricity consumption and the like, and has the functions of converting primary energy in nature into electric energy through a power generation power device, and supplying the electric energy to each user through power transmission, transformation and distribution.
The existing power flow calculation method is mainly used for carrying out power flow calculation by setting switching states and operation data of power grid equipment on a power grid model according to requirements of users, and the users can study distribution changes of power grid power flow. However, the above scheme needs to repeatedly construct the power grid model, which cannot flexibly adjust the power grid system, so that the flexibility of power flow calculation is reduced.
Disclosure of Invention
The invention provides a power flow calculation method, a device and equipment of a power grid system, which solve the technical problem that the power flow calculation flexibility is reduced because the power grid system cannot be flexibly adjusted due to the fact that the power grid model needs to be repeatedly constructed in the existing scheme.
The power flow calculation method of the power grid system provided by the first aspect of the invention comprises the following steps:
Responding to a selection instruction input by any client, and selecting a target power flow calculation type from a plurality of preset power flow calculation types;
obtaining corresponding input data according to the target power flow calculation type;
carrying out power flow calculation by adopting the input data to generate a power flow calculation result;
Returning the load flow calculation result to the client; and the client is used for adjusting the power grid system according to the power flow calculation result.
Optionally, the multiple power flow calculation types include a basic power flow calculation type, an online power flow calculation type, an offline power flow calculation type and an optimal power flow calculation type; the step of obtaining corresponding input data according to the target power flow calculation type comprises the following steps:
When the target power flow calculation type is the basic power flow calculation type, acquiring system parameters, topological connection relations, load node input power and bus voltage of the power grid system as input data;
When the target power flow calculation type is the online power flow calculation type, acquiring a real-time power grid section of the power grid system as input data;
when the target power flow calculation type is the offline power flow calculation type, acquiring switching state and operation data input by the client for power grid equipment in the power grid system as input data;
And when the target power flow calculation type is the optimal power flow calculation type, acquiring static running conditions and control variables corresponding to the power grid system as input data.
Optionally, when the target power flow calculation type is the base power flow calculation type, the step of performing power flow calculation by using the input data to generate a power flow calculation result includes:
Calculating voltage amplitude and phase angle corresponding to each bus of the power grid system by adopting system parameters of the power grid system, the topological connection relation, the load node input power and the bus voltage;
According to the preset power flow convergence precision, the maximum convergence frequency and the calculation range, calculating the active power and the reactive power of each branch of the power grid system in the calculation range;
and generating a power flow calculation result by adopting the voltage amplitude, the phase angle, the active power and the reactive power.
Optionally, when the target power flow calculation type is the online power flow calculation type, the step of performing power flow calculation by using the input data to generate a power flow calculation result includes:
Calculating a power grid running state corresponding to the power grid system by adopting on-line state estimation and combining the real-time power grid section; the power grid running state comprises the voltage of each bus, the power distribution in the network, the power generation output, the total load addition and the power loss;
and generating a power flow calculation result by adopting the power grid running state.
Optionally, when the target power flow calculation type is the offline power flow calculation type, the offline power flow calculation type includes a real-time mode and a research mode; the step of adopting the input data to perform load flow calculation and generating a load flow calculation result comprises the following steps:
if the power grid system is in the real-time mode, adjusting a real-time operation section corresponding to the power grid system based on each switching state and each operation data, and performing power flow calculation to generate a first power flow calculation result;
And if the power flow is in the research mode, carrying out power flow calculation according to a preset historical power grid model and combining the operation data, and generating a second power flow calculation result.
Optionally, the control variable comprises a plurality of control sub-variables; when the target power flow calculation type is the optimal power flow calculation type, the step of adopting the input data to perform power flow calculation and generating a power flow calculation result comprises the following steps:
responding to an objective function selection instruction input by the client, and selecting an objective optimization function under the static running condition;
Selecting a target control variable from the plurality of control sub-variables according to the target optimization function;
And adjusting the target control variable according to a preset adjusting gradient so as to minimize the target optimization function.
Optionally, the method further comprises:
When a model selection instruction is received at a preset main control interface, selecting a target power grid model and an initial operation mode and jumping to a parameter setting page;
determining a target operation parameter in response to a parameter setting instruction received at the parameter setting page;
creating a power grid system according to the target operation parameters;
And after the power flow calculation result is generated, displaying the power flow calculation result on a current interface.
The second aspect of the present invention provides a power flow calculation device of a power grid system, comprising:
The load flow calculation type selection module is used for responding to a selection instruction input by any client and selecting a target load flow calculation type from a plurality of preset load flow calculation types;
the input data acquisition module is used for acquiring corresponding input data according to the target power flow calculation type;
the power flow calculation module is used for carrying out power flow calculation by adopting the input data to generate a power flow calculation result;
the power flow calculation result returning module is used for returning the power flow calculation result to the client; and the client is used for adjusting the power grid system according to the power flow calculation result.
Optionally, the apparatus further comprises:
the operation selection module is used for selecting a target power grid model and an initial operation mode and jumping to a parameter setting page when a model selection instruction is received at a preset main control interface;
The operation parameter selection module is used for responding to the parameter setting instruction received in the parameter setting page to determine a target operation parameter;
The power grid system creation module is used for creating a power grid system according to the target operation parameters;
and the power flow calculation result display module is used for displaying the power flow calculation result on the current interface after the power flow calculation result is generated.
A third aspect of the present invention provides an electronic device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of the method for calculating a power flow of a power grid system according to any of the first aspect of the present invention.
From the above technical scheme, the invention has the following advantages:
According to the method, a target power flow calculation type is selected from a plurality of preset power flow calculation types by responding to a selection instruction input by any client; obtaining corresponding input data according to the target power flow calculation type; carrying out power flow calculation by adopting input data to generate a power flow calculation result; and returning the power flow calculation result to the client, and adjusting and optimizing the power grid system according to the power flow calculation result through the client. Therefore, the adjustment and optimization of the power grid system are more efficiently and flexibly realized through diversified power flow calculation.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a flow chart of steps of a method for calculating a power flow of a network system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of power flow calculation according to an embodiment of the present invention;
fig. 3 is a block diagram of a power flow calculation device of a network system according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a power flow calculation method, device and equipment of a power grid system, which are used for solving the technical problem that the flexibility of power flow calculation is reduced because the power grid system cannot be flexibly adjusted due to the fact that the power grid model needs to be repeatedly constructed in the existing scheme.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating steps of a method for calculating a power flow of a network system according to an embodiment of the present invention.
The invention provides a power flow calculation method of a power grid system, which comprises the following steps:
Step 101, responding to a selection instruction input by any client, and selecting a target power flow calculation type from a plurality of preset power flow calculation types;
The flow calculation and the electromechanics term refer to the calculation of the distribution of active power, reactive power and voltage in a power grid under the conditions of given power system network topology, element parameters and power generation and load parameters. The tide calculation is to determine the steady state operation state parameters of each part of the power system according to the given power grid structure, parameters, the operation conditions of the generator, the load and other elements.
In the embodiment of the invention, the target power flow calculation type is selected from a plurality of power flow calculation types by responding to a selection instruction input by any client. The plurality of power flow calculation types may include, but are not limited to, a base power flow calculation type, an online power flow calculation type, an offline power flow calculation type, and an optimal power flow calculation type. The method can be expressed in the form of a basic power flow calculation module, an online power flow calculation module, an offline power flow calculation module and an optimal power flow calculation module in specific implementation.
102, Acquiring corresponding input data according to the target power flow calculation type;
optionally, the multiple power flow calculation types include a basic power flow calculation type, an online power flow calculation type, an offline power flow calculation type and an optimal power flow calculation type; step 102 may comprise the sub-steps of:
When the target power flow calculation type is the basic power flow calculation type, acquiring system parameters, topological connection relations, load node input power and bus voltage of the power grid system as input data;
When the target power flow calculation type is the online power flow calculation type, acquiring a real-time power grid section of the power grid system as input data;
when the target power flow calculation type is the offline power flow calculation type, acquiring switching state and operation data input by the client for power grid equipment in the power grid system as input data;
And when the target power flow calculation type is the optimal power flow calculation type, acquiring static running conditions and control variables corresponding to the power grid system as input data.
In the embodiment of the invention, the basic power flow calculation module can acquire parameters such as load nodes PQ and generator nodes PV, set power flow convergence accuracy and maximum convergence times, set power flow calculation ranges for different lines, different areas or the whole network, and the like as input data. The on-line power flow calculation module can acquire reference nodes of all electric islands, acquire distribution modes and distribution coefficients of unbalanced power, set load nodes PQ, generator nodes PV and balance nodes, acquire power flow convergence accuracy and maximum convergence times, and set parameters such as a heavy load rate limit value and the like as input data. When the target power flow calculation type is the offline power flow calculation type, acquiring switching state and operation data input by the client for power grid equipment in the power grid system as input data; and when the target power flow calculation type is the optimal power flow calculation type, acquiring static running conditions and control variables corresponding to the power grid system as input data.
In a particular implementation, the input data may include, but is not limited to, the following types: the method comprises the steps of obtaining an initial operation mode, bus voltage, various power of a distribution network, equipment operation states and switching-on/switching-off states of a breaker/disconnecting link from state estimation or CASE management according to parameter data such as equipment static topological connection relations, impedance, capacity and limit values of various equipment of the distribution network.
Step 103, carrying out load flow calculation by adopting the input data to generate a load flow calculation result;
The flow calculation can be mathematically summarized as solving a nonlinear equation set, and the mathematical model is abbreviated as follows:
f (X) =0 is a system of nonlinear equations, wherein:
f= (F1, F2,) hi.
X= (X1, X2,........., xn) T is the node voltage to be solved.
Optionally, when the target power flow calculation type is the base power flow calculation type, step 103 may include the following sub-steps:
Calculating voltage amplitude and phase angle corresponding to each bus of the power grid system by adopting system parameters of the power grid system, the topological connection relation, the load node input power and the bus voltage;
According to the preset power flow convergence precision, the maximum convergence frequency and the calculation range, calculating the active power and the reactive power of each branch of the power grid system in the calculation range;
and generating a power flow calculation result by adopting the voltage amplitude, the phase angle, the active power and the reactive power.
In the embodiment of the invention, the system parameters of the power grid system, the topological connection relation, the input power of the load node and the bus voltage are adopted to calculate the voltage amplitude and the phase angle corresponding to each bus of the power grid system; according to the preset power flow convergence precision, the maximum convergence frequency and the calculation range, calculating the active power and the reactive power of each branch of the power grid system in the calculation range; generating a power flow calculation result by adopting the voltage amplitude, the phase angle, the active power and the reactive power
In a specific implementation, the functions of the base power flow calculation module corresponding to the base power flow calculation type include: a) And a mature, efficient and practical tide algorithm is adopted, so that the convergence and instantaneity of calculation are ensured. Load flow calculation of various load calculation models is supported, wherein the load flow calculation comprises load models of constant current, constant capacity, constant active power and the like. b) And the calculation of a line distribution network, a region distribution network and a full distribution network can be supported. c) And when the tide calculation is not converged, providing calculation iteration information for a user to diagnose the cause of the non-convergence. d) For the distribution automation coverage area, because the real-time data acquisition is complete, accurate power flow calculation can be performed, and for the area which is not covered or is not covered completely by the automation, the power flow estimation can be performed by utilizing the quasi-real-time data of the metering automation system and utilizing the state estimation to complement the data as much as possible. e) And providing a load flow calculation result comparison function of multiple data sections. f) The flow calculation result prompts alarm, and out-of-limit alarm information can be prompted according to the thermal stability limit value (maximum chargeable load) of the line and the bus voltage limit value. g) And a single-phase/three-phase power flow calculation function is supported.
Furthermore, network loss calculation, such as loss calculation and statistics of a system, a region and equipment, is performed during statistical assessment, practical operation indexes of on-line power flow analysis are calculated, and analysis and statistics of annual, monthly and daily operation indexes are performed.
On the other hand, the provided man-machine interface is used for controlling the starting of the online tide analysis, setting calculation parameters and checking calculation results and statistical index information.
Optionally, when the target power flow calculation type is the online power flow calculation type, step 103 may include the following sub-steps:
Calculating a power grid running state corresponding to the power grid system by adopting on-line state estimation and combining the real-time power grid section; the power grid running state comprises the voltage of each bus, the power distribution in the network, the power generation output, the total load addition and the power loss;
and generating a power flow calculation result by adopting the power grid running state.
In specific implementation, the power grid running state corresponding to the power grid system can be calculated by combining the real-time power grid section through input and online state estimation; the power grid running state comprises the voltage of each bus, the power distribution in the network, the power generation output, the total load addition and the power loss; and generating a power flow calculation result by adopting the power grid running state.
In another example of the present invention, according to the parameters of the power grid model, the topological connection relation, the given PQ injection power and the PV busbar voltage, the voltage amplitude and phase angle of each busbar are solved, and the active power and reactive power on each branch of the whole network are calculated, and the functions include: a) Mature, efficient and practical tide algorithm is adopted, so that the convergence and instantaneity of calculation are ensured; the method at least has two algorithms of quick decoupling and Newton-Laporton, and the algorithm can be manually selected or automatically switched according to the iteration condition. b) And the power flow calculation of multiple electric islands is supported, and the power flow calculation (optional) of an alternating current-direct current hybrid system is supported. c) The method is characterized in that a buffer network is supported to be established to improve the convergence rate and accuracy of power flow calculation, and a buffer network model and operation data can be automatically acquired from a superior system or an adjacent power grid system; d) The voltage control calculation function of controlling the voltage of the junction bus by using the generator is supported. e) The model and the data after model splicing are supported to realize the load flow calculation of the whole network, and the local power network model and the data can be directly adopted to carry out corresponding calculation analysis. f) And the unbalanced power is supported to be adjusted to the related units according to the distribution coefficient, so that the power flow of the power grid is more in line with the actual situation. g) And when the tide calculation is not converged, providing calculation iteration information for a user to diagnose the cause of the non-convergence. h) And prompting out-of-limit alarm information according to the limit of the power transmission section, the thermal stability limit value of the equipment and the bus voltage limit value. i) And providing a load flow calculation result comparison function of multiple data sections. j) The automatic cycle ground state power flow calculation is supported, the automatic alarm can be realized according to the out-of-limit condition, and the alarm threshold can be realized by setting the number of out-of-limit equipment, the highest out-of-limit proportion and the like. k) The system supports the triggering of events such as line tripping, switch deflection and the like in a selected range, automatically starts a tide calculation function, can automatically give an alarm according to the out-of-limit condition, and can set the number of out-of-limit equipment, the highest out-of-limit proportion and the like. l) unbalanced power can be borne by the units and loads of the whole network according to the frequency characteristic, and the frequency is calculated. m) has the calculation function of single-ended charging of the line, and gives the voltage and the charging power at two ends of the line. n) providing a dynamic topology tree picture, designating a station (or bus) by a user, forming a topology connection relation tree consisting of the station (or bus), the connected station (or bus) and the connected equipment, displaying power flow calculation values such as voltage and power on the bus and the equipment, and facilitating the user to analyze the power flow distribution of the power grid in a local area.
Optionally, when the target power flow calculation type is the offline power flow calculation type, the offline power flow calculation type includes a real-time mode and a research mode; step 103 may comprise the sub-steps of:
if the power grid system is in the real-time mode, adjusting a real-time operation section corresponding to the power grid system based on each switching state and each operation data, and performing power flow calculation to generate a first power flow calculation result;
And if the power flow is in the research mode, carrying out power flow calculation according to a preset historical power grid model and combining the operation data, and generating a second power flow calculation result.
In the embodiment of the invention, if the power grid system is in the real-time mode, the real-time operation section corresponding to the power grid system is adjusted based on each switching state and each operation data, and the power flow calculation is performed, so that a first power flow calculation result is generated. For example
And if the power flow is in the research mode, carrying out power flow calculation according to a preset historical power grid model and combining the operation data, and generating a second power flow calculation result. The historical power grid model comprises power grid models respectively constructed at historical time and future time, so that generation and modification of various running modes such as real-time, future, history and the like are configured to carry out power flow calculation. For example, grid operation mode data such as input busbar voltage, unit/load power, line/transformer power, transformer tap position, current, frequency, etc.; and the power grid operation state data such as the opening/closing of a circuit breaker (switch)/a disconnecting switch (disconnecting link). The dispatcher tide analyzing and evaluating the operation indexes of the dispatcher tide to be sent comprises the following data of the month qualification rate of the dispatcher tide and the calculation result error of the dispatcher tide; index data such as single tide calculation time. Or 1) active power predicted values for system/bus load prediction; 2) An active power schedule value for a plant/unit generation schedule; 3) A tie line exchange plan; 4) Equipment on/off status of equipment maintenance planning.
Optionally, the control variable comprises a plurality of control sub-variables; when the target power flow calculation type is the optimal power flow calculation type, step 103 may include the following sub-steps:
responding to an objective function selection instruction input by the client, and selecting an objective optimization function under the static running condition;
Selecting a target control variable from the plurality of control sub-variables according to the target optimization function;
And adjusting the target control variable according to a preset adjusting gradient so as to minimize the target optimization function.
In a specific implementation, responding to an objective function selection instruction input by the client, and selecting an objective optimization function under the static running condition; selecting a target control variable from the plurality of control sub-variables according to the target optimization function; and adjusting the target control variable according to a preset adjusting gradient so as to minimize the target optimization function.
In the embodiment of the invention, the limit values of all the control variables are adjustable. The roles and control sequences of certain control variables can also be freely specified. These control variables may be freely combined to accommodate different optimization problems, and the types of control sub-variables may include, but are not limited to: 1) An adjustable bus voltage amplitude; 2) Active power of the unit; 3) Reactive power of the unit; 4) A transformer tap; 5) Adjusting reactive power of a camera; 6) A capacitor/reactor group; 7) Exchanging power with other grid companies; 8) Load control; 9) A phase shifter tap; 10 Direct current control. Constraint: a) The limits of all constraints can be freely adjusted. For different optimization objectives, constraints are represented by different combinations of these constraint variables. Constraints may be assigned to a device or to a class of devices; b) Whether the constraint participates in the calculation or not can be specified manually; c) At least the following constraints are provided: 1) Active power limit and reactive power limit of the unit; 2) Active power limit of zone switching; 3) Reserve of regional active power; 4) Tap constraints for on-load tap changers; 5) Branch tidal current limit; 6) Amplitude limit of bus voltage; 7) A phase shifter angle limit; 8) And stabilizing the section limit value.
Optionally, for the optimal power flow calculation module corresponding to the optimal power flow calculation type, the following performance requirements are further provided: a) The scale of the optimal power flow is not less than: 50000 buses, 80000 branches and 100 electric movable islands; b) The single optimal power flow calculation time is not more than 3 minutes; at least 5 users are supported for simultaneous use, each user may use any one of the modes of functionality.
Step 104, returning the load flow calculation result to the client; and the client is used for adjusting the power grid system according to the power flow calculation result.
In one example of the invention, after diversified power flow calculation results are obtained, the power flow calculation results can be returned to the client, and parameters such as the structure, the switching condition, the bus and equipment voltage and power of the power grid system are adjusted through the client according to the power flow calculation results, so that further optimization of the power grid system is realized.
Optionally, the method further comprises the steps of:
When a model selection instruction is received at a preset main control interface, selecting a target power grid model and an initial operation mode and jumping to a parameter setting page;
determining a target operation parameter in response to a parameter setting instruction received at the parameter setting page;
creating a power grid system according to the target operation parameters;
And after the power flow calculation result is generated, displaying the power flow calculation result on a current interface.
In one example of the invention, when a model selection instruction is received at a preset main control interface, a target power grid model and an initial operation mode are selected and a parameter setting page is jumped; determining a target operation parameter in response to a parameter setting instruction received at the parameter setting page; creating a power grid system according to the target operation parameters; and after the power flow calculation result is generated, displaying the power flow calculation result on a current interface.
Referring to fig. 2, in a specific implementation, the master control screen is provided for the functions of power grid model and initial operation mode selection, and power flow calculation is started manually. And providing a parameter setting picture for modifying relevant parameters for controlling the flow calculation, such as a flow algorithm, a convergence criterion, a maximum iteration number, load model setting and the like. And CASE management pictures can be called to realize the operations of saving, restoring, deleting and the like of the current tide section. The switching state, the power value of the load, the voltage value of the bus and the feeder outlet voltage can be set on the single line diagram. And providing a current display interface with a current flow calculation result list, and supporting the result comparison of the two flow sections. The tide calculation result can be directly displayed on the single line diagram, the network loss information and the out-of-limit information list are provided, and the out-of-limit information can mark alarm information on the out-of-limit element of the single line diagram, so that the positioning of users is facilitated. And providing a statistics assessment information picture, and displaying information such as the use condition of the tide month of the dispatcher, the tide calculation result error and the like. Should be displayed with obvious convergence or not and calculation ending time, and all pictures can be printed out according to the requirement.
In the embodiment of the invention, a target power flow calculation type is selected from a plurality of preset power flow calculation types by responding to a selection instruction input by any client; obtaining corresponding input data according to the target power flow calculation type; carrying out power flow calculation by adopting input data to generate a power flow calculation result; and returning the power flow calculation result to the client, and adjusting and optimizing the power grid system according to the power flow calculation result through the client. Therefore, the adjustment and optimization of the power grid system are more efficiently and flexibly realized through diversified power flow calculation.
Referring to fig. 3, fig. 3 shows a block diagram of a power flow calculation device of a power grid system according to an embodiment of the invention.
The embodiment of the invention provides a power flow calculation device of a power grid system, which comprises the following components:
the tide calculation type selecting module 301 is configured to select a target tide calculation type from among a plurality of preset tide calculation types in response to a selection instruction input by any client;
an input data obtaining module 302, configured to obtain corresponding input data according to the target power flow calculation type;
the power flow calculation module 303 is configured to perform power flow calculation using the input data, and generate a power flow calculation result;
a power flow calculation result returning module 304, configured to return the power flow calculation result to the client; and the client is used for adjusting the power grid system according to the power flow calculation result.
Optionally, the multiple power flow calculation types include a basic power flow calculation type, an online power flow calculation type, an offline power flow calculation type and an optimal power flow calculation type; the input data acquisition module 302 is specifically configured to:
When the target power flow calculation type is the basic power flow calculation type, acquiring system parameters, topological connection relations, load node input power and bus voltage of the power grid system as input data;
When the target power flow calculation type is the online power flow calculation type, acquiring a real-time power grid section of the power grid system as input data;
when the target power flow calculation type is the offline power flow calculation type, acquiring switching state and operation data input by the client for power grid equipment in the power grid system as input data;
And when the target power flow calculation type is the optimal power flow calculation type, acquiring static running conditions and control variables corresponding to the power grid system as input data.
Optionally, when the target power flow calculation type is the base power flow calculation type, the power flow calculation module 303 is specifically configured to:
Calculating voltage amplitude and phase angle corresponding to each bus of the power grid system by adopting system parameters of the power grid system, the topological connection relation, the load node input power and the bus voltage;
According to the preset power flow convergence precision, the maximum convergence frequency and the calculation range, calculating the active power and the reactive power of each branch of the power grid system in the calculation range;
and generating a power flow calculation result by adopting the voltage amplitude, the phase angle, the active power and the reactive power.
Optionally, when the target power flow calculation type is the online power flow calculation type, the power flow calculation module 303 is specifically configured to:
Calculating a power grid running state corresponding to the power grid system by adopting on-line state estimation and combining the real-time power grid section; the power grid running state comprises the voltage of each bus, the power distribution in the network, the power generation output, the total load addition and the power loss;
and generating a power flow calculation result by adopting the power grid running state.
Optionally, when the target power flow calculation type is the offline power flow calculation type, the offline power flow calculation type includes a real-time mode and a research mode; the load flow calculation module 303 is specifically configured to:
if the power grid system is in the real-time mode, adjusting a real-time operation section corresponding to the power grid system based on each switching state and each operation data, and performing power flow calculation to generate a first power flow calculation result;
And if the power flow is in the research mode, carrying out power flow calculation according to a preset historical power grid model and combining the operation data, and generating a second power flow calculation result.
Optionally, the control variable comprises a plurality of control sub-variables; when the target power flow calculation type is the optimal power flow calculation type, the power flow calculation module 303 is specifically configured to:
responding to an objective function selection instruction input by the client, and selecting an objective optimization function under the static running condition;
Selecting a target control variable from the plurality of control sub-variables according to the target optimization function;
And adjusting the target control variable according to a preset adjusting gradient so as to minimize the target optimization function.
Optionally, the apparatus further comprises:
the operation selection module is used for selecting a target power grid model and an initial operation mode and jumping to a parameter setting page when a model selection instruction is received at a preset main control interface;
The operation parameter selection module is used for responding to the parameter setting instruction received in the parameter setting page to determine a target operation parameter;
The power grid system creation module is used for creating a power grid system according to the target operation parameters;
and the power flow calculation result display module is used for displaying the power flow calculation result on the current interface after the power flow calculation result is generated.
The embodiment of the invention also provides electronic equipment, which comprises a memory and a processor, wherein the memory stores a computer program, and the computer program when executed by the processor causes the processor to execute the steps of the power flow calculation method of the power grid system according to any embodiment of the invention.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus and modules described above may refer to the corresponding process in the foregoing method embodiment, which is not repeated herein.
In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A power flow calculation method of a power grid system, comprising:
Responding to a selection instruction input by any client, and selecting a target power flow calculation type from a plurality of preset power flow calculation types;
obtaining corresponding input data according to the target power flow calculation type;
carrying out power flow calculation by adopting the input data to generate a power flow calculation result;
Returning the load flow calculation result to the client; the client is used for adjusting the power grid system according to the power flow calculation result;
the multiple power flow calculation types comprise a basic power flow calculation type, an online power flow calculation type, an offline power flow calculation type and an optimal power flow calculation type; the step of obtaining corresponding input data according to the target power flow calculation type comprises the following steps:
When the target power flow calculation type is the basic power flow calculation type, acquiring system parameters, topological connection relations, load node input power and bus voltage of the power grid system as input data;
When the target power flow calculation type is the online power flow calculation type, acquiring a real-time power grid section of the power grid system as input data;
when the target power flow calculation type is the offline power flow calculation type, acquiring switching state and operation data input by the client for power grid equipment in the power grid system as input data;
And when the target power flow calculation type is the optimal power flow calculation type, acquiring static running conditions and control variables corresponding to the power grid system as input data.
2. The method according to claim 1, wherein when the target power flow calculation type is the base power flow calculation type, the step of performing power flow calculation using the input data, generating a power flow calculation result, includes:
Calculating voltage amplitude and phase angle corresponding to each bus of the power grid system by adopting system parameters of the power grid system, the topological connection relation, the load node input power and the bus voltage;
According to the preset power flow convergence precision, the maximum convergence frequency and the calculation range, calculating the active power and the reactive power of each branch of the power grid system in the calculation range;
and generating a power flow calculation result by adopting the voltage amplitude, the phase angle, the active power and the reactive power.
3. The method according to claim 1, wherein when the target power flow calculation type is the online power flow calculation type, the step of performing power flow calculation using the input data to generate a power flow calculation result includes:
Calculating a power grid running state corresponding to the power grid system by adopting on-line state estimation and combining the real-time power grid section; the power grid running state comprises the voltage of each bus, the power distribution in the network, the power generation output, the total load addition and the power loss;
and generating a power flow calculation result by adopting the power grid running state.
4. The method of claim 1, wherein when the target power flow calculation type is the offline power flow calculation type, the offline power flow calculation type includes a real-time mode and a research mode; the step of adopting the input data to perform load flow calculation and generating a load flow calculation result comprises the following steps:
if the power grid system is in the real-time mode, adjusting a real-time operation section corresponding to the power grid system based on each switching state and each operation data, and performing power flow calculation to generate a first power flow calculation result;
And if the power flow is in the research mode, carrying out power flow calculation according to a preset historical power grid model and combining the operation data, and generating a second power flow calculation result.
5. The method of claim 1, wherein the control variable comprises a plurality of control sub-variables; when the target power flow calculation type is the optimal power flow calculation type, the step of adopting the input data to perform power flow calculation and generating a power flow calculation result comprises the following steps:
responding to an objective function selection instruction input by the client, and selecting an objective optimization function under the static running condition;
Selecting a target control variable from the plurality of control sub-variables according to the target optimization function;
And adjusting the target control variable according to a preset adjusting gradient so as to minimize the target optimization function.
6. The method according to claim 1, wherein the method further comprises:
When a model selection instruction is received at a preset main control interface, selecting a target power grid model and an initial operation mode and jumping to a parameter setting page;
determining a target operation parameter in response to a parameter setting instruction received at the parameter setting page;
creating a power grid system according to the target operation parameters;
And after the power flow calculation result is generated, displaying the power flow calculation result on a current interface.
7. A power flow calculation device of a power grid system, characterized by comprising:
The load flow calculation type selection module is used for responding to a selection instruction input by any client and selecting a target load flow calculation type from a plurality of preset load flow calculation types;
the input data acquisition module is used for acquiring corresponding input data according to the target power flow calculation type;
the power flow calculation module is used for carrying out power flow calculation by adopting the input data to generate a power flow calculation result;
the power flow calculation result returning module is used for returning the power flow calculation result to the client; the client is used for adjusting the power grid system according to the power flow calculation result;
the multiple power flow calculation types comprise a basic power flow calculation type, an online power flow calculation type, an offline power flow calculation type and an optimal power flow calculation type; the input data acquisition module is specifically configured to:
When the target power flow calculation type is the basic power flow calculation type, acquiring system parameters, topological connection relations, load node input power and bus voltage of the power grid system as input data;
When the target power flow calculation type is the online power flow calculation type, acquiring a real-time power grid section of the power grid system as input data;
when the target power flow calculation type is the offline power flow calculation type, acquiring switching state and operation data input by the client for power grid equipment in the power grid system as input data;
And when the target power flow calculation type is the optimal power flow calculation type, acquiring static running conditions and control variables corresponding to the power grid system as input data.
8. The apparatus of claim 7, wherein the apparatus further comprises:
the operation selection module is used for selecting a target power grid model and an initial operation mode and jumping to a parameter setting page when a model selection instruction is received at a preset main control interface;
The operation parameter selection module is used for responding to the parameter setting instruction received in the parameter setting page to determine a target operation parameter;
The power grid system creation module is used for creating a power grid system according to the target operation parameters;
and the power flow calculation result display module is used for displaying the power flow calculation result on the current interface after the power flow calculation result is generated.
9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program which, when executed by the processor, causes the processor to perform the steps of the power flow calculation method of the power grid system according to any one of claims 1-6.
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