CN116760126A - Active power determining method and device, electronic equipment and storage medium - Google Patents
Active power determining method and device, electronic equipment and storage medium Download PDFInfo
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- G06F30/20—Design optimisation, verification or simulation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H02J3/241—The oscillation concerning frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
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Abstract
The application provides a method and a device for determining active power, electronic equipment and a storage medium, and relates to the technical field of photovoltaic power generation; the method comprises the following steps: acquiring power station operation data of a power station before starting to execute a calculation strategy; the calculation strategy is used for determining the target active power of the total unit of the power station; determining equivalent impedance parameters of the power station based on the power station operation data; under the condition that the calculation strategy starts to be executed, determining a target active network loss based on the equivalent impedance parameter and the power station operation data; and determining the target active power based on the power station operation data and the target active power loss. By the method, fluctuation in the active process of the active automatic control system due to the fact that the active data of the inverter and the active data of the grid-connected point are not synchronous can be restrained, and therefore the active control precision of the active automatic control system can be improved; the method has the advantages of less number of required parameters, simple and convenient operation process and improvement of the control precision and control speed of the active automatic control system.
Description
Technical Field
The present application relates to the field of photovoltaic power generation technologies, and in particular, to a method and apparatus for determining active power, an electronic device, and a storage medium.
Background
The active automatic control system of each photovoltaic power station can respond to the active target instruction issued by the upper-level dispatching by controlling the active power of the inverter in the station after receiving the active target instruction issued by the upper-level dispatching.
However, in the related art, because each photovoltaic power station has different specific conditions, the active power collecting modes of the inverter and the grid-connected point of the active automatic control system are different, the specific implementation of the communication protocols of each path and the communication protocols of different manufacturers are different, so that the active data of the inverter and the grid-connected point input into the active automatic control system are almost unlikely to be in the same section at the moment of performing active control calculation, and have a certain error. Considering various fault conditions in the aspect of communication, under severe conditions, the error can even become an error, so that the active power calculated by the active automatic control system is inaccurate, and the active control precision is low.
Therefore, how to improve the active control accuracy of the active automatic control system is a problem to be solved at present.
Disclosure of Invention
Aiming at the problems existing in the prior art, the embodiment of the application provides a method and a device for determining active power, electronic equipment and a storage medium.
The application provides a method for determining active power, which is applied to an active automatic control system and comprises the following steps:
acquiring power station operation data of a power station before starting to execute a calculation strategy; the calculation strategy is used for determining the target active power of the total unit of the power station;
determining equivalent impedance parameters of the power station based on the power station operation data;
under the condition that the calculation strategy starts to be executed, determining a target active network loss based on the equivalent impedance parameter and the power station operation data; the target active power loss is the active power loss at the moment when the active automatic control system starts executing the calculation strategy;
and determining the target active power based on the power station operation data and the target active network loss.
Optionally, the plant operation data comprises at least one of:
the sum of the active power of the total unit of the power station;
the sum of reactive power of the total unit of the power station;
grid-connected active power;
reactive power at the grid-connected point;
the sum of real reactive power of SVG equipment of the reactive power compensation device;
the target reactive power value is used for representing the reactive power value after the actual reactive power of the power station unit flows to the grid-connected point;
real-time voltage of the grid connection point;
the first active network loss is the active network loss before the active automatic control system starts executing the calculation strategy;
the current point of connection is the active comprehensive target value.
Optionally, the determining the equivalent impedance parameter of the power station based on the power station operation data includes:
determining the equivalent impedance parameter based on the first active network loss, the grid-connected point active power, the grid-connected point real-time voltage and the target reactive power value; the target reactive power value is obtained by subtracting the sum of the real reactive power of the SVG equipment of the reactive compensation device from the reactive power of the grid-connected point.
Optionally, the determining the target active power loss based on the equivalent impedance parameter and the power station operation data includes:
and determining the target active network loss based on the current grid-connected point active comprehensive target value, the target reactive value, the grid-connected point real-time voltage and the equivalent impedance parameter.
Optionally, the determining the target active power based on the power station operation data and the target active power loss includes:
and adding the current grid-connected point active comprehensive target value and the target active grid loss to determine the target active power of the power station total unit.
Optionally, the equivalent impedance parameter is determined by the following formula (1):
（1）
wherein ,representing the equivalent impedance parameter; />Representing the first active loss; />Representing the real-time voltage of the grid-connected point; />Representing the active power of the grid connection point; />Representing the target reactive value.
Optionally, after the determining the target active power based on the plant operation data and the target active power loss, the method further includes:
and controlling the active power of the power station total unit based on the target active power.
The application also provides a device for determining the active power, which is applied to an active automatic control system and comprises:
the acquisition module is used for acquiring power station operation data of the power station before starting to execute the calculation strategy; the calculation strategy is used for determining the target active power of the total unit of the power station;
the first determining module is used for determining equivalent impedance parameters of the power station based on the power station operation data;
the second determining module is used for determining a target active network loss based on the equivalent impedance parameter and the power station operation data under the condition that the calculation strategy starts to be executed; the target active power loss is the active power loss at the moment when the active automatic control system starts executing the calculation strategy;
and the third determining module is used for determining the target active power based on the power station operation data and the target active network loss.
The application also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method for determining active power as described above when executing the program.
The present application also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of determining active power as described in any of the above.
The application also provides a computer program product comprising a computer program which when executed by a processor implements a method of determining active power as described in any of the above.
According to the method, the device, the electronic equipment and the storage medium for determining the active power, the active automatic control system obtains the power station operation data of the power station before starting to execute the calculation strategy, and then determines the equivalent impedance parameter of the power station based on the power station operation data; meanwhile, in the process of executing the calculation strategy by the active automatic control system, only power station operation data are required to be input, so that the number of required parameters is small, the operation process is simple and reliable, the control precision and control speed of the active automatic control system are obviously improved, the number of times of adjusting the active by the active automatic control system is reduced, unnecessary electric quantity loss is reduced for a new energy station on the basis of meeting the active adjustment requirement of the upper-level scheduling, and the operation and maintenance level and economic benefit of the station are improved.
Drawings
In order to more clearly illustrate the application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a method for determining active power according to the present application;
FIG. 2 is a second flow chart of the method for determining active power according to the present application;
FIG. 3 is a third flow chart of the active power determining method according to the present application;
FIG. 4 is a schematic structural diagram of an active power determining device according to the present application;
fig. 5 is a schematic structural diagram of an electronic device provided by the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In order to facilitate a clearer understanding of various embodiments of the present application, some relevant knowledge will be presented first.
Noun interpretation:
automatic active control system: the control system is arranged at the new energy station end and is used for receiving the command of the AGC main station of the power grid, and the power generation unit in the station is regulated and controlled to be active, so that the grid-connected point is active to meet the main station requirement, and the control system is a main control means for controlling the active of the new energy station by the power grid.
Active power: the electric energy is directly consumed, the electric energy is converted into mechanical energy, thermal energy, chemical energy or acoustic energy, and the energy is utilized to do work, and the part of power is called active power.
Reactive power: consume electrical energy, but simply convert it into another form of energy, which is a prerequisite for the electrical device to be able to do work, and which is converted periodically with the electrical energy in the grid, this part of the power being called reactive power.
Combining point: and a new energy photovoltaic station power output summarizing point. The examination of new energy is usually all at the grid-connected point.
Compared with the conventional thermal power generation, the new energy power generation has randomness and volatility, and the photovoltaic power generation also has the characteristics. As the photovoltaic permeability in the power grid increases year by year, the grid-connected operation of the photovoltaic power station can influence the safe and stable operation of the power grid. In recent years, various electric power network companies continuously put forward demands, active control functions of energy photovoltaic power stations are gradually popularized, and it is becoming more common for the photovoltaic power stations to be provided with active automatic control systems.
At present, an active automatic control system equipped for each photovoltaic power station can collect the operation data of an inverter and key data of a primary main wiring diagram in the station, and after an active target instruction issued by the upper-level scheduling is received, the active target instruction issued by the upper-level scheduling is responded by controlling the active power of the inverter in the station. Among all the key data in the station collected by the active automatic control system, the active power of the inverter and the active power of the grid-connected point of the power station are important.
The active automatic control system collects the active power of the inverter, and the following approaches are approximately available:
1) Acquired by communicating with an inverter;
2) Acquired by communication with a data acquisition device;
3) Indirectly acquired through measurement and control communication with the box transformer;
4) Indirectly acquired through communication with the in-station comprehensive self-platform.
The active automatic control system collects the active power of the point of connection and has the following approaches:
1) The method comprises the steps of obtaining through communication with an in-station comprehensive self-platform;
2) The method comprises the steps of obtaining the data through communication with a line protection measurement and control device;
3) Obtained by wiring with a line voltage transformer (Phase voltage Transformers, PT)/current transformer (Current Transformer, CT).
Because each photovoltaic power station has different specific conditions, the mode of collecting the active power of the inverter and the grid connection point by the active automatic control system is different from the specific implementation of the communication protocols of the various paths and the communication protocols of different manufacturers, so that the active data of the inverter and the grid connection point input in the active automatic control system is almost unlikely to be in the same section at the moment of carrying out active control calculation, and a certain degree of error exists. Such errors may even become erroneous in view of various fault conditions in the communication.
Therefore, aiming at the situation that the active data of the inverter and the active data of the grid-connected point are not on the same section, how to calculate the active loss more accurately carries out deep analysis processing on the data collected by the active automatic control system, thereby becoming an important research direction of manufacturers and having high practical significance.
The application provides a method for determining active power, which is applied to an active automatic control system and is used for solving the problem of low active control precision of the active automatic control system caused by the problem of asynchronous active data of an inverter active and grid-connected points.
The method for determining the active power provided by the present application is specifically described below with reference to fig. 1 to 3. Fig. 1 is one of the flow diagrams of the active power determining method provided by the present application, and referring to fig. 1, the method is applied to an active automatic control system, and includes steps 101 to 104, where:
step 101, before starting to execute a calculation strategy, acquiring power station operation data of a power station; the calculation strategy is used for determining the target active power of the total unit of the power station.
Firstly, it should be noted that the execution main body of the application is an active automatic control system, wherein the active automatic control system is also called automatic generating capacity control (Automatic Generation Control, AGC), the AGC mainly receives an adjustment target issued by a dispatching master station periodically or a locally preset adjustment target to calculate the power requirement of the photovoltaic power station, and the active power control of the photovoltaic power station is finally realized by selecting control equipment and carrying out power distribution and automatically issuing a final control instruction to the controlled equipment, and the active power adjustment target value issued by a tracking dispatching center is tracked to meet the grid-connected technical requirement of the photovoltaic power station.
In the embodiment of the application, the active automatic control system needs to execute a calculation strategy for determining the target active power of the total machine set of the power station, so as to calculate the target active power and realize active control of the power station.
Power plant operation data of a power plant (e.g., a photovoltaic power plant) needs to be acquired before the active automation control system begins executing the calculation strategy.
Optionally, the plant operation data comprises at least one of:
a) Sum of active power of total unit of power stationAbbreviated as +.>；
b) Sum of reactive power of total units of power stationAbbreviated as +.>；
c) Grid-connected point active powerAbbreviated as +.>；
d) Reactive power of grid-connected pointAbbreviated as +.>；
e) The sum of the real reactive power of the reactive power compensation device (Static Var Generator, SVG) equipment, abbreviated as；
f) The target reactive power value is used for representing the reactive power value after the actual reactive power of the power station unit flows to the grid-connected point, which is also called grid-connected point reactive power after SVG equipment reactive power is removed, and is abbreviated as；
g) Real-time voltage of the grid-connected point, abbreviated as；
h) The first active network loss is the active network loss before the active automatic control system starts executing the calculation strategy, and is abbreviated asThe method comprises the steps of carrying out a first treatment on the surface of the Specifically, the first active power loss->。
i) Active comprehensive target value of current point of connectionWritten as。
And 102, determining equivalent impedance parameters of the power station based on the power station operation data.
In the embodiment of the application, the equivalent impedance parameter can intensively reflect the power frequency impedance value of the electromagnetic relationship or the voltage-current relationship of the power grid element in a specific running state (such as a steady state or a transient state). In an equivalent grid, the elements are represented by their equivalent impedance parameters.
Step 103, determining a target active network loss based on the equivalent impedance parameter and the power station operation data under the condition that the calculation strategy starts to be executed; the target active power loss is the active power loss at the moment when the active automatic control system starts executing the calculation strategy.
In the embodiment of the application, the equivalent impedance parameters are determined based on the power station operation data before starting to execute the calculation strategy.
Therefore, under the condition that the active automatic control system starts to execute the calculation strategy, the fluctuation in the active process of the active automatic control system, caused by the problem that the active data of the inverter and the active data of the grid-connected point are not synchronous, can be effectively restrained based on the equivalent impedance parameter and the power station operation data, and further the target active network loss can be accurately determined.
And 104, determining the target active power based on the power station operation data and the target active network loss.
According to the method for determining the active power, before the calculation strategy starts to be executed, the active automatic control system determines the equivalent impedance parameter of the power station by acquiring the power station operation data of the power station and then based on the power station operation data, and because the equivalent impedance parameter is determined based on the power station operation data before the calculation strategy starts to be executed, under the condition that the active automatic control system starts to execute the calculation strategy, the fluctuation in the active process of the active automatic control system caused by the problem that the active data of the inverter and the active data of the grid-connected point are not synchronous can be effectively restrained based on the equivalent impedance parameter and the power station operation data, and then the target active power can be accurately determined, and further the active control is performed by utilizing the target active power, so that the active control precision of the active automatic control system is improved; meanwhile, in the process of executing the calculation strategy by the active automatic control system, only power station operation data are required to be input, so that the number of required parameters is small, the operation process is simple and reliable, the control precision and control speed of the active automatic control system are obviously improved, the number of times of adjusting the active by the active automatic control system is reduced, unnecessary electric quantity loss is reduced for a new energy station on the basis of meeting the active adjustment requirement of the upper-level scheduling, and the operation and maintenance level and economic benefit of the station are improved.
Optionally, the determining the equivalent impedance parameter of the power station based on the power station operation data may be specifically implemented by the following steps:
determining the equivalent impedance parameter based on the first active network loss, the grid-connected point active power, the grid-connected point real-time voltage and the target reactive power value; the target reactive power value is obtained by subtracting the sum of the real reactive power of the SVG equipment of the reactive compensation device from the reactive power of the grid-connected point.
In an embodiment of the present application, in the present application,。
optionally, the equivalent impedance parameter is determined by the following formula (1):
（1）
wherein ,representing the equivalent impedance parameter; />Representing the first active loss; />Representing the real-time voltage of the grid-connected point; />Representing the active power of the grid connection point; />Representing the target reactive value.
Optionally, the determining the target active power loss based on the equivalent impedance parameter and the power station operation data may be specifically implemented by:
and determining the target active network loss based on the current grid-connected point active comprehensive target value, the target reactive value, the grid-connected point real-time voltage and the equivalent impedance parameter.
In the embodiment of the application, the active comprehensive target value is based on the current point of connectionTarget reactive value->Real-time voltage of grid-connected point->Equivalent impedance parameter->Determining the target active net loss by using the formula (2)>The method comprises the steps of carrying out a first treatment on the surface of the Wherein, formula (2) is expressed as:
（2）
optionally, the determining the target active power based on the power station operation data and the target active power loss includes:
and adding the current grid-connected point active comprehensive target value and the target active grid loss to determine the target active power of the power station total unit. Specifically, the expression can be represented by the following formula (3):
（3）
optionally, after the determining the target active power based on the plant operation data and the target active power loss, the active automatic control system needs to perform the following operations:
and controlling the active power of the power station total unit based on the target active power.
Fig. 2 is a second flow chart of the active power determining method provided by the present application, referring to fig. 2, the method is applied to an active automatic control system, and includes steps 201 to 205, wherein:
step 201, acquiring power station operation data of a power station before starting to execute a calculation strategy; wherein the calculation strategy is used for determining the target active power of the total unit of the power station.
Specifically, the plant operational data includes at least one of:
sum of active power of total unit of power station；
Sum of reactive power of total units of power station；
Grid-connected point active power；
Reactive power of grid-connected point；
Sum of actual reactive power of SVG equipment of reactive power compensation device；
The target reactive power value is used for representing the reactive power value after the actual reactive power of the power station unit flows to the grid-connected point；
Real-time voltage of grid-connected point；
First active network lossThe method comprises the steps of starting an active power automatic control system to execute an active power network loss before the calculation strategy is started;
active comprehensive target value of current point of connection。
Step 202, determining equivalent impedance parameters based on the first active network loss, the active power of the grid-connected point, the real-time voltage of the grid-connected point and the target reactive power value.
And 203, determining a target active network loss based on the current grid-connected point active comprehensive target value, the target reactive value, the grid-connected point real-time voltage and the equivalent impedance parameter.
And 204, adding the current grid-connected point active comprehensive target value and the target active grid loss to determine the target active power of the power station total unit.
Step 205, controlling the active power of the power station total unit based on the target active power.
Fig. 3 is a third flow chart of the method for determining active power provided by the present application, referring to fig. 3, the method is applied to an active automatic control system, and includes steps 301 to 308, where:
step 301, starting periodic calculation.
Specifically, the timing of starting periodic computation is that the timing is finished or a new active instruction is received.
Step 302, acquiring power station operation data.
Step 303, counting the sum of the active power, the sum of the reactive power of all the generator sets and the sum of the reactive power of all the reactive compensation devices.
Step 304, judging whether the strategy of the active automatic control system starts to be calculated, if not, executing step 305-step 306; if yes, go to step 307-step 308.
Step 305, calculating the active network loss.
Step 306, the equivalent impedance parameter of the station is calculated, and step 301 is executed again.
Step 307, calculating the active network loss according to the equivalent impedance parameters of the station.
Step 308, calculating the total unit active target, and returning to execute step 301.
In order to more clearly understand the effect of the method for determining active power provided by the embodiment of the present application, the method for determining active power provided by the present application is further explained below with reference to specific embodiment 1.
Example 1:
a150 MW new energy station is provided, which is provided with 60 generator sets and 2 SVG reactive power compensation devices.
Before the active automatic control system starts a calculation strategy, the following power station operation data are acquired:、/>、/>、/>grid-connected point voltage->The active integrated target value of the grid-connected point is +.>。
First calculate the active netLoss of:the method comprises the steps of carrying out a first treatment on the surface of the Then calculating reactive power +.A.after the reactive power of SVG equipment is removed in the grid-connected point>：
。
Then solving equivalent impedance parameters of the station:
。
After the equivalent impedance parameters are obtained by solving, the active network loss is calculated：
。
Finally, the total crew objective is calculated:
。
in the method, the fluctuation in the active process of the active automatic control system, which is caused by the problem that the active data of the current inverter and the active data of the grid-connected point are not synchronous, can be effectively restrained by a control algorithm based on data driving without depending on equipment parameters such as a circuit, a transformer and the like, the control precision of the active is obviously improved, and the adjustment times of the active automatic control system are also reduced to a certain extent.
In addition, the application adopts a data-driven regression method, the number of the required input parameters in the calculation process is less, the calculation process is simple and reliable, the adaptation scene is more, and the popularization is facilitated.
That is, the application adopts a data-driven regression method, the number of input parameters required in the calculation process is less, the calculation process is simple and reliable, the active fluctuation caused by the adjustment of the active automatic control system is effectively avoided, and a strength is contributed to the enhancement of the stability of the power grid.
The calculated active loss precision is higher, and the control speed and the control precision of the active automatic control system are obviously improved. The number of times of adjusting the active power by the active power automatic control system is reduced, the fluctuation of the active power of the grid-connected point around the target value is effectively reduced, a lot of unnecessary electric quantity loss is reduced for the new energy station on the basis of meeting the active power adjustment requirement of the upper-level scheduling, and the operation and maintenance level and the economic benefit of the station are improved.
The active power determining device provided by the application is described below, and the active power determining device described below and the active power determining method described above can be referred to correspondingly. Fig. 4 is a schematic structural diagram of an active power determining device provided by the present application, and as shown in fig. 4, the active power determining device 400 is applied to an active automatic control system, and includes: an acquisition module 401, a first determination module 402, a second determination module 403, and a third determination module 404, wherein:
an acquisition module 401 for acquiring plant operation data of the power plant before starting to execute the calculation strategy; the calculation strategy is used for determining the target active power of the total unit of the power station;
a first determining module 402, configured to determine an equivalent impedance parameter of the power plant based on the power plant operation data;
a second determining module 403, configured to determine a target active network loss based on the equivalent impedance parameter and the power station operation data when executing the calculation strategy; the target active power loss is the active power loss at the moment when the active automatic control system starts executing the calculation strategy;
and a third determining module 404, configured to determine the target active power based on the power station operation data and the target active power loss.
According to the active power determining device provided by the application, before the calculation strategy starts to be executed, the active automatic control system determines the equivalent impedance parameter of the power station by acquiring the power station operation data of the power station and then based on the power station operation data, and because the equivalent impedance parameter is determined based on the power station operation data before the calculation strategy starts to be executed, under the condition that the active automatic control system starts to execute the calculation strategy, the fluctuation in the active process of the active automatic control system caused by the problem that the active data of the inverter and the active data of the grid-connected point are not synchronous can be effectively restrained based on the equivalent impedance parameter and the power station operation data, so that the target active power can be accurately determined, the active control is performed by using the target active power, and the active control precision of the active automatic control system is improved; meanwhile, in the process of executing the calculation strategy by the active automatic control system, only power station operation data are required to be input, so that the number of required parameters is small, the operation process is simple and reliable, the control precision and control speed of the active automatic control system are obviously improved, the number of times of adjusting the active by the active automatic control system is reduced, unnecessary electric quantity loss is reduced for a new energy station on the basis of meeting the active adjustment requirement of the upper-level scheduling, and the operation and maintenance level and economic benefit of the station are improved.
Optionally, the plant operation data comprises at least one of:
the sum of the active power of the total unit of the power station;
the sum of reactive power of the total unit of the power station;
grid-connected active power;
reactive power at the grid-connected point;
the sum of real reactive power of SVG equipment of the reactive power compensation device;
the target reactive power value is used for representing the reactive power value after the actual reactive power of the power station unit flows to the grid-connected point;
real-time voltage of the grid connection point;
the first active network loss is the active network loss before the active automatic control system starts executing the calculation strategy;
the current point of connection is the active comprehensive target value.
Optionally, the first determining module 402 is further configured to:
determining the equivalent impedance parameter based on the first active network loss, the grid-connected point active power, the grid-connected point real-time voltage and the target reactive power value; the target reactive power value is obtained by subtracting the sum of the real reactive power of the SVG equipment of the reactive compensation device from the reactive power of the grid-connected point.
Optionally, the second determining module 403 is further configured to:
and determining the target active network loss based on the current grid-connected point active comprehensive target value, the target reactive value, the grid-connected point real-time voltage and the equivalent impedance parameter.
Optionally, the third determining module 404 is further configured to:
and adding the current grid-connected point active comprehensive target value and the target active grid loss to determine the target active power of the power station total unit.
Optionally, the equivalent impedance parameter is determined by the following formula (1):
（1）
wherein ,representing the equivalent impedance parameter; />Representing the first active loss; />Representing the real-time voltage of the grid-connected point; />Representing the active power of the grid connection point; />Representing the target reactive value.
Optionally, the apparatus further comprises:
and the control module is used for controlling the active power of the power station total unit based on the target active power.
Fig. 5 is a schematic structural diagram of an electronic device according to the present application, and as shown in fig. 5, the electronic device may include: processor 510, communication interface (Communications Interface) 520, memory 530, and communication bus 540, wherein processor 510, communication interface 520, memory 530 complete communication with each other through communication bus 540. Processor 510 may invoke logic instructions in memory 530 to perform a method of determining active power, the method being applied to an active automation system, comprising: acquiring power station operation data of a power station before starting to execute a calculation strategy; the calculation strategy is used for determining the target active power of the total unit of the power station; determining equivalent impedance parameters of the power station based on the power station operation data; under the condition that the calculation strategy starts to be executed, determining a target active network loss based on the equivalent impedance parameter and the power station operation data; the target active power loss is the active power loss at the moment when the active automatic control system starts executing the calculation strategy; and determining the target active power based on the power station operation data and the target active network loss.
Further, the logic instructions in the memory 530 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-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.
In another aspect, the present application also provides a computer program product, where the computer program product includes a computer program, where the computer program can be stored on a non-transitory computer readable storage medium, where the computer program, when executed by a processor, can perform a method for determining active power provided by the above methods, where the method is applied to an active automatic control system, and includes: acquiring power station operation data of a power station before starting to execute a calculation strategy; the calculation strategy is used for determining the target active power of the total unit of the power station; determining equivalent impedance parameters of the power station based on the power station operation data; under the condition that the calculation strategy starts to be executed, determining a target active network loss based on the equivalent impedance parameter and the power station operation data; the target active power loss is the active power loss at the moment when the active automatic control system starts executing the calculation strategy; and determining the target active power based on the power station operation data and the target active network loss.
In yet another aspect, the present application also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform a method of determining active power provided by the above methods, the method being applied to an active automatic control system, comprising: acquiring power station operation data of a power station before starting to execute a calculation strategy; the calculation strategy is used for determining the target active power of the total unit of the power station; determining equivalent impedance parameters of the power station based on the power station operation data; under the condition that the calculation strategy starts to be executed, determining a target active network loss based on the equivalent impedance parameter and the power station operation data; the target active power loss is the active power loss at the moment when the active automatic control system starts executing the calculation strategy; and determining the target active power based on the power station operation data and the target active network loss.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present application without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application 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 application.
Claims (10)
1. The method for determining the active power is characterized by being applied to an active automatic control system and comprising the following steps of:
acquiring power station operation data of a power station before starting to execute a calculation strategy; the calculation strategy is used for determining the target active power of the total unit of the power station;
determining equivalent impedance parameters of the power station based on the power station operation data;
under the condition that the calculation strategy starts to be executed, determining a target active network loss based on the equivalent impedance parameter and the power station operation data; the target active power loss is the active power loss at the moment when the active automatic control system starts executing the calculation strategy;
and determining the target active power based on the power station operation data and the target active network loss.
2. The method of claim 1, wherein the plant operational data comprises at least one of:
the sum of the active power of the total unit of the power station;
the sum of reactive power of the total unit of the power station;
grid-connected active power;
reactive power at the grid-connected point;
the sum of real reactive power of SVG equipment of the reactive power compensation device;
the target reactive power value is used for representing the reactive power value after the actual reactive power of the power station unit flows to the grid-connected point;
real-time voltage of the grid connection point;
the first active network loss is the active network loss before the active automatic control system starts executing the calculation strategy;
the current point of connection is the active comprehensive target value.
3. The method of determining active power of claim 2, wherein determining the equivalent impedance parameter of the power plant based on the plant operational data comprises:
determining the equivalent impedance parameter based on the first active network loss, the grid-connected point active power, the grid-connected point real-time voltage and the target reactive power value; the target reactive power value is obtained by subtracting the sum of the real reactive power of the SVG equipment of the reactive compensation device from the reactive power of the grid-connected point.
4. The method for determining active power according to claim 2, wherein determining the target active power loss based on the equivalent impedance parameter and the plant operation data comprises:
and determining the target active network loss based on the current grid-connected point active comprehensive target value, the target reactive value, the grid-connected point real-time voltage and the equivalent impedance parameter.
5. The method for determining active power according to claim 2, wherein the determining the target active power based on the plant operation data and the target active power loss comprises:
and adding the current grid-connected point active comprehensive target value and the target active grid loss to determine the target active power of the power station total unit.
6. The method of determining active power according to any one of claims 2 to 5, wherein the equivalent impedance parameter is determined by the following formula (1):
（1）
wherein ,representing the equivalent impedance parameter; />Representing the first active loss; />Representing the real-time voltage of the grid-connected point; />Representing the active power of the grid connection point; />Representing the target reactive value.
7. The method of determining active power according to any one of claims 2 to 5, wherein after said determining the target active power based on the plant operation data and the target active power loss, the method further comprises:
and controlling the active power of the power station total unit based on the target active power.
8. An active power determining device, which is applied to an active automatic control system, comprising:
the acquisition module is used for acquiring power station operation data of the power station before starting to execute the calculation strategy; the calculation strategy is used for determining the target active power of the total unit of the power station;
the first determining module is used for determining equivalent impedance parameters of the power station based on the power station operation data;
the second determining module is used for determining a target active network loss based on the equivalent impedance parameter and the power station operation data under the condition that the calculation strategy starts to be executed; the target active power loss is the active power loss at the moment when the active automatic control system starts executing the calculation strategy;
and the third determining module is used for determining the target active power based on the power station operation data and the target active network loss.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of determining the active power according to any of claims 1 to 7 when executing the program.
10. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the method of determining active power according to any one of claims 1 to 7.
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