CN116632880B - Multifunctional coordination control method and device for wind farm energy storage system and terminal equipment - Google Patents
Multifunctional coordination control method and device for wind farm energy storage system and terminal equipment Download PDFInfo
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Abstract
The invention is applicable to the technical field of new energy sources, and provides a multifunctional coordination control method, device and terminal equipment of a wind farm energy storage system, wherein the method comprises the following steps: constructing a power curve correction function and an energy management time transfer function; when the current energy storage regulation mode of the target wind power plant is grid-connected regulation, acquiring the conventional electricity limiting condition of the target wind power plant; when the target wind power plant does not have conventional electricity limiting, judging whether a temporary electricity limiting plan exists in a preset time length in the future, if so, preferentially calling an energy management time transfer function, and otherwise, preferentially calling a power curve correction function; when the target wind power plant has conventional electricity limiting, judging main economic loss in the same month of the last year; when the main economic loss in the same month of the last year is the abandoned wind economic loss, preferentially calling the energy management time transfer function; when the main economic loss in the same month of the last year is the curve check economic loss, the power curve correction function is preferentially called.
Description
Technical Field
The invention belongs to the technical field of new energy, and particularly relates to a multifunctional coordination control method, device and terminal equipment of a wind farm energy storage system.
Background
In the prior art, the multiplexing potential of the energy storage system of the wind power plant is far not excited, and the currently applied energy storage control method of the wind power plant only has a single regulation scene, such as single wind abandon problem solving, single curve tracking solving or power standby function of station electricity consumption, and lacks a scheme of applying the energy storage system to coordinated control of multiple functions, so that the wind power energy storage efficiency and the income are low, and the energy is wasted.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a multifunctional coordinated control method, a device, a terminal device and a computer readable storage medium for a wind farm energy storage system, which are used for solving the technical problems that the prior art is single in adjustment scene, easy to cause energy waste and low in wind power energy storage efficiency and income.
A first aspect of an embodiment of the present invention provides a method for multifunctional coordinated control of an energy storage system of a wind farm, which is applied to a terminal device, and includes:
the construction steps are as follows: dividing an energy storage adjusting function according to the requirements of a wind farm, and constructing a power curve correcting function and an energy management time transfer function;
a first judging step: judging the current energy storage regulation mode of the target wind power plant;
the first calling step: when the current energy storage regulation mode of the target wind power plant is off-grid regulation, if the target wind power plant has off-grid power supply requirements, calling an off-grid power supply function;
the acquisition step: when the current energy storage regulation mode of the target wind power plant is grid-connected regulation, acquiring the conventional electricity limiting condition of the target wind power plant;
And a second calling step: when the target wind power plant does not have conventional electricity limiting, judging whether a temporary electricity limiting plan exists in a preset time length in the future, if so, preferentially calling an energy management time transfer function, and otherwise, preferentially calling a power curve correction function;
And a second judging step: when the target wind power plant has the conventional electricity limiting, judging main economic loss in the same month of the last year according to the data of the same month of the last year;
and a third calling step: when the main economic loss in the same month of the last year is the abandoned wind economic loss, preferentially calling the energy management time transfer function;
fourth calling step: when the main economic loss in the same month of the last year is the curve check economic loss, the power curve correction function is preferentially called.
A second aspect of the embodiment of the present invention provides a multifunctional coordination control device for a wind farm energy storage system, which is applied to a terminal device, and includes:
The building module is used for dividing the energy storage adjusting function according to the wind farm requirements and building a power curve correcting function and an energy management time transfer function;
the first judging module is used for judging the current energy storage adjusting mode of the target wind power plant;
The first calling module is used for calling an off-grid power supply function if the off-grid power supply requirement exists in the target wind power plant when the current energy storage regulation mode of the target wind power plant is off-grid regulation;
the acquisition module is used for acquiring the conventional electricity limiting condition of the target wind power plant when the current energy storage regulation mode of the target wind power plant is grid-connected regulation;
The second calling module is used for judging whether a temporary electricity limiting plan exists in a preset time length in the future when the target wind power plant does not have conventional electricity limiting, if so, preferentially calling the energy management time transfer function, and otherwise, preferentially calling the power curve correction function;
The second judging module is used for judging main economic losses in the same month of the last year according to the data of the same month of the last year when the target wind power plant has the conventional electricity limiting;
the third calling module is used for preferentially calling the energy management time transfer function when the main economic loss in the same month of the last year is the abandoned wind economic loss;
And the fourth calling module is used for preferentially calling the power curve correction function when the main economic loss in the same month of the last year is the curve check economic loss.
A third aspect of the embodiments of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of the method for multifunctional coordinated control of a wind farm energy storage system according to the first aspect.
A fourth aspect of the embodiments of the present invention provides a computer readable storage medium storing a computer program, which when executed by a processor, implements the steps of the method for multifunctional coordinated control of a wind farm energy storage system of the first aspect.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: the intelligent wind power generation system can intelligently judge the current core demand of the wind power plant, and can set various different combined regulation modes, so that the regulation potential of the energy storage system is efficiently excited, the regulation scenes which can be dealt with are abundant, the energy waste is avoided, and the wind power energy storage efficiency and the income are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 shows a flow diagram of a method for multifunctional coordinated control of a wind farm energy storage system provided by the invention;
FIG. 2 shows a schematic diagram of a classification of wind farm energy storage regulation function provided by the invention;
FIG. 3 shows a schematic structural diagram of a multifunctional coordinated control device for a wind farm energy storage system;
fig. 4 shows a schematic structural diagram of a terminal device provided by the present invention.
Description of the embodiments
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
Firstly, the invention provides a multifunctional coordination control method for an energy storage system of a wind farm.
Referring to fig. 1, fig. 1 shows a flow chart of a method for multifunctional coordinated control of an energy storage system of a wind farm. Referring to fig. 2, fig. 2 shows a schematic diagram of classification of a wind farm energy storage regulation function according to the present invention.
As shown in fig. 1, the multifunctional coordination control method for the wind farm energy storage system can include the following steps:
The construction steps are as follows: dividing the energy storage adjusting function according to the wind farm demand, and constructing a power curve correcting function and an energy management time transferring function.
As shown in fig. 2, wind power energy storage regulation can be divided into two major types, namely grid-connected regulation and off-grid regulation, and the grid-connected regulation can be divided into two major types, namely active regulation and reactive regulation. In general, active regulation in grid-connected regulation takes the place of main regulation, and reactive regulation only serves as an auxiliary function. Off-grid regulation is only applied to wind farms in extreme cases such as grid power failure. Thus, grid-tied active regulation may be a major requirement of current wind farms.
Grid-connected active regulation mainly comprises: predictive power tracking compensation, relief of wind curtailment regulation, station power regulation, frequency modulation, auxiliary spot transactions, and the like.
In the present invention, grid-tie active regulation can be divided into three main categories, namely a power curve correction function, an energy management time transfer function and other functions. The power curve correction function is mainly used for changing the form of an output power curve in real time, and aims to enable the output power curve to reach an assessment standard and increase station income in regulation and control. The energy management time transfer function has no requirement on the form of a real-time output curve, only the energy is transferred in peak-valley periods, and the aim is to realize the efficient utilization of the energy and increase the station income in the angle of energy utilization. Other functions mainly use the active output of stored energy to compensate the electricity consumption of the station so as to reduce the electricity consumption cost.
Wherein, the power curve correction function includes: the system comprises a power prediction tracking compensation module, a wind power energy storage frequency modulation module, an auxiliary spot transaction module and the like.
The power prediction tracking compensation module predicts wind power in a certain future time range by using a power prediction model of the wind power plant. Based on these predictions, the system may formulate a scheduling policy and issue a target active power to the energy storage system to compensate for the difference between the actual output power of the wind farm and the predicted power. Therefore, the operation of the wind power plant can be optimized, the power generation efficiency is improved, and the unstable influence on the power grid is reduced.
The wind power energy storage frequency modulation module rapidly adjusts the generated power of the wind power plant according to the power grid demand so as to balance supply and demand differences and maintain the stability of the power grid frequency. The wind power energy storage frequency modulation module is controlled according to the frequency signal of the power grid through the quick response capability of the energy storage system, so that the wind power station can provide frequency modulation service. When the grid frequency deviates from the standard range, the energy storage system can inject or absorb power to adjust the output of the wind power plant so as to keep the stability of the grid frequency.
Wherein the auxiliary spot transaction module allows the wind farm to utilize the energy storage system for auxiliary spot power transactions. By monitoring changes in market electricity prices and power demands, the energy storage system can intelligently decide when and in what manner to inject or absorb electrical energy into the grid to maximize revenue or reduce cost. This module allows the wind farm to participate in real-time scheduling and trading of the power market, providing flexibility and economy.
Wherein the energy management time transfer function includes: and the wind-abandoning electricity limiting and adjusting module is relieved.
For the wind-abandoning electricity limiting and adjusting module, the electricity quantity can be charged and saved as much as possible when the wind power plant can generate more than the electricity limiting value, and the electricity generation capacity can be increased as much as possible when the wind speed is low.
Among other functions, include: station power conditioning modules, etc.
For the station electricity regulation module, a part of electric energy is usually required by the wind farm for self operation, such as operation of a fan, power supply of a control system and the like. The station electricity consumption adjusting module is used for monitoring the station electricity consumption requirement of the wind power plant and adjusting the power output of the energy storage system according to the supply and demand condition of the power grid and the running state of the wind power plant so as to meet the station electricity consumption requirement of the wind power plant. This module ensures that the internal power requirements of the wind farm are met while coordinating the power interaction with the grid.
A first judging step: and judging the current energy storage adjusting mode of the target wind power plant.
It should be noted that, this step mainly is to determine whether the current energy storage adjustment mode is off-grid adjustment or on-grid adjustment.
The grid-connected regulation refers to a regulation mode that an energy storage system is connected with a power grid to meet the power grid demand and provide support. In grid-connected regulation, the energy storage system can dynamically adjust the output power according to the requirements of the power grid so as to balance the supply and demand difference of the power system and regulate the power fluctuation. The main objective is to maintain the stability and reliability of the grid while optimizing the operational efficiency of the wind farm.
The off-grid regulation refers to a regulation mode in which the energy storage system operates when disconnected from the power grid. Off-grid regulation is typically only applied in the event of a grid failure, power loss or other extreme conditions. The main goal of off-grid regulation is to ensure that the wind farm remains operational after disconnection of the grid, providing self-sufficient power support.
The first calling step: when the current energy storage regulation mode of the target wind power plant is off-grid regulation, if the target wind power plant has off-grid power supply requirements, the off-grid power supply function is invoked.
The off-grid power supply function refers to the capability of the energy storage system to provide independent power supply for users or devices under the condition of power grid failure or power failure. This function generally works in situations where it is necessary to cope with emergency situations or where a stable grid cannot be accessed in remote areas.
The acquisition step: when the current energy storage regulation mode of the target wind power plant is grid-connected regulation, the conventional electricity limiting condition of the target wind power plant is obtained.
The purpose of acquiring the conventional electricity limiting condition of the target wind power plant is to confirm the wind power consumption rate of the region where the target wind power plant is located.
And a second calling step: when the target wind power plant does not have conventional electricity limiting, judging whether a temporary electricity limiting plan exists in a preset time length in the future, if so, preferentially calling an energy management time transfer function, and otherwise, preferentially calling a power curve correction function.
When the target wind power plant does not have the conventional electricity limiting, the wind power consumption rate of the region where the target wind power plant is located is high.
Further, by judging whether a temporary electricity limiting plan exists in a future preset time period, the expected condition of the power system can be known in advance, including the period of power supply tension and the possible electricity limiting condition.
If there is a temporary electricity limiting schedule for a preset period of time in the future, this means that the grid may reduce the capacity of the wind farm for a certain period of time. In this case, in order to make maximum use of the power generation capacity of the wind farm, the energy management time transfer function may be preferentially invoked. The function can transfer part of the generated energy to a lower demand or an unlimited time period within a preset duration within an allowable range according to the demand of the power grid so as to avoid the generated energy loss caused by the limitation of the power grid.
If there is no temporary electricity limiting schedule within a predetermined time period in the future, i.e. the grid is expected to be able to stably accommodate the power generation capacity of the wind farm, then the power curve correction function may be prioritized. The power curve correction function can adjust the power generation power curve according to the power grid requirements and the actual running conditions of the wind power plant so as to better meet the power grid requirements and optimize the power generation benefits.
In one possible implementation, the specific steps of invoking the power curve correction function preferentially include:
a first judging sub-step: and judging whether the wind power generation power of the target wind power plant is smaller than the electric power for the station, and if so, calling a station electric regulation module. Otherwise, the next step is entered.
If the wind power generation power of the target wind power plant is smaller than the station electricity consumption power, the target wind power plant needs to purchase electric quantity from a power grid and needs to purchase according to the local industrial electricity price, and the station electricity consumption adjusting module is called to store energy and discharge under the condition, so that the peak-valley electricity purchase curve of station electricity consumption is adjusted, and the station electricity consumption cost is reduced.
The first calling sub-step: and when the theoretical maximum active power of the target wind power plant is smaller than or equal to the power limit power of the power grid, any one module in the power curve correction function is called to perform power curve correction.
It should be noted that when the theoretical maximum active power of the wind farm is less than or equal to the grid electricity limiting power, this means that the generating capacity of the wind farm is already close or approaching the receiving capacity of the grid. In order to comply with the constraints of the grid, the power of the wind farm needs to be corrected to operate within the limits. The module which invokes the power curve correction function performs power curve correction, so that the available power can be utilized to the maximum extent on the premise that the wind power plant meets the limit condition of the power grid, thereby avoiding the problem on the power grid and improving the power generation efficiency of the wind power plant.
A first issuing substep: and issuing target active power.
Specifically, a particular active power value is issued to a wind farm or other power generation facility as its target or desired output active power. This target power value may be set according to grid requirements, energy management policies, or other factors.
In a possible implementation manner, after the first judging sub-step, the specific step of preferentially calling the power curve correction function further includes:
The second calling sub-step: and when the theoretical optimal active power of the target wind power plant is larger than the power limit power of the power grid, calling a relief wind abandon power limit adjusting module to store the redundant power generation amount.
It should be noted that, the theoretical optimal active power of the wind farm being greater than the grid electricity limiting power means that the wind farm can actually provide more power, but is limited by the capacity of the grid or other limiting conditions, and part of the generated energy cannot be incorporated into the grid to supply power. To avoid wasting such excess power generation, the call mitigation waste wind limit adjustment module may store the excess power generation for re-injection into the grid or for other uses as needed.
In a possible implementation manner, the specific step of preferentially calling the power curve correction function after the first downlink sub-step further comprises:
And a third judging sub-step: judging whether reactive power regulation requirements exist or not, if so, issuing a reactive power target value in the range of the residual maximum reactive power margin of the converter; otherwise, continuing to issue the target active power.
It should be noted that the purpose of determining whether there is a reactive power regulation requirement is to determine whether the current wind farm needs to adjust reactive power to meet the requirement of the power grid. If reactive regulation needs exist, this means that the wind farm needs to provide a certain reactive power to regulate the voltage and power balance of the grid at the same time as the active power. In the case that the reactive power regulation requirement is judged, the residual maximum reactive power margin range is further judged to ensure that the capacity limit of the converter is not exceeded when the reactive power is regulated by the wind farm. The converter has a certain reactive power regulation capacity, while the remaining maximum reactive margin range represents the currently adjustable reactive power range of the converter. If there is enough adjustment space in the remaining maximum reactive margin range, reactive target values can be issued in the range, so that the wind farm adjusts reactive power thereof to meet the requirements of the power grid. In this way voltage control and power balancing of the grid can be achieved. If the reactive power regulation requirement does not exist or the regulation requirement cannot be met within the range of the residual maximum reactive power margin, the wind power plant can continue to send out target active power and continue to meet the active power requirement of the power grid.
In one possible implementation, the specific steps of preferentially invoking energy management time transfer functions include:
a second judging sub-step: and judging whether the wind power generation power of the target wind power plant is smaller than the electric power for the station, and if so, calling a station electric regulation module. Otherwise, the next step is entered.
If the wind power generation power of the target wind power plant is smaller than the station electricity consumption power, the target wind power plant needs to purchase electric quantity from a power grid and needs to purchase according to the local industrial electricity price, and the station electricity consumption adjusting module is called to store energy and discharge under the condition, so that the peak-valley electricity purchase curve of station electricity consumption is adjusted, and the station electricity consumption cost is reduced.
A first acquisition sub-step: and acquiring a day-ahead power prediction curve of the target wind power plant relative to the next day.
The future power prediction curve is a result of predicting the power generation of the wind farm in the future day by using a pointer to a target wind farm according to information such as historical data, weather forecast, wind speed measurement and the like and representing the power generation in a curve form. This curve is typically generated during the previous day or earlier to make planning and decisions prior to actual power generation. The predicted time range is typically divided by an interval of hours or less from the early morning of the next day to 24 hours of the day. The day-ahead power prediction curve of the next day has important significance for the operation and scheduling of the wind power plant. The method can provide estimation and prediction on future power generation, and help a wind farm to formulate a reasonable power generation plan and scheduling strategy so as to meet the power grid demand and market demand. The accuracy and precision of the prediction curve is critical to achieving reliable power generation scheduling and maximizing energy utilization.
A second acquisition sub-step: and obtaining a preset power limiting reference curve.
The preset power limiting reference curve is a power curve set according to the power grid requirement or other factors and is used for specifying the maximum allowable active power output of the target wind power plant in a specific time period. In order to ensure safe and stable operation of the power grid in the operation of the power system, the output power of power generation facilities such as a wind farm and the like sometimes needs to be regulated and limited. The preset power limiting reference curve can be used for controlling the generated power of the wind farm, so that the generated power does not exceed the preset power limit in a specific time period.
A third calling sub-step: and when the proportion of the pre-day power prediction curve above the preset power limiting reference curve exceeds a first preset proportion, calling a relief waste wind power limiting adjustment module, and storing the redundant power generation amount.
It should be noted that, the proportion of the current day power prediction curve above the preset power limit reference curve exceeds the first preset proportion, which means that the predicted power generation amount of the wind farm exceeds the limit requirement of the power grid. In this case, if no regulation measures are taken, the power generation exceeding the limit will be discarded, and the power supply cannot be injected into the grid, resulting in waste of wind energy resources and economic loss. In order to utilize wind energy resources to the greatest extent and avoid waste wind, a release waste wind electricity limiting and adjusting module is called, and surplus generated energy is stored. Further, by relieving the wind curtailment limit adjustment module, the excess power generation can be converted into a stored energy form, such as battery energy storage or other forms of energy storage in the energy storage system.
The size of the first preset proportion can be set by a person skilled in the art according to practical situations, and the invention is not limited.
A second issuing substep: and issuing target active power.
Specifically, a particular active power value is issued to a wind farm or other power generation facility as its target or desired output active power. This target power value may be set according to grid requirements, energy management policies, or other factors.
In one possible implementation, the specific step of preferentially invoking the energy management time transfer function after the second acquisition sub-step further comprises:
Fourth calling sub-step: and when the proportion of the power prediction curve before the day below the preset power limiting reference curve exceeds a second preset proportion, invoking a power curve correction function.
It should be noted that, the proportion of the current day power prediction curve below the preset power limiting reference curve exceeds the second preset proportion, which means that the predicted power generation amount of the wind power plant is low and the limit requirement of the power grid cannot be met. In this case, if no regulation measures are taken, the wind farm may not meet the requirements of the grid, resulting in a problem of insufficient power supply of the grid. In order to adjust the generated power of the wind farm to be closer to the requirement of a preset power limiting reference curve, the function of power curve correction is called. And furthermore, the power curve correction function can be used for adjusting the generated power of the wind power plant to increase or decrease the generated power so as to better match the requirements of the power grid.
In one possible embodiment, after the second issuing sub-step, the specific step of preferentially invoking the energy management time transfer function further comprises:
Fourth judging sub-step: and judging whether reactive power regulation requirements exist, if so, issuing a reactive power target value in the range of the residual maximum reactive power margin of the converter. Otherwise, continuing to issue the target active power.
It should be noted that the purpose of determining whether there is a reactive power regulation requirement is to determine whether the current wind farm needs to adjust reactive power to meet the requirement of the power grid. If reactive regulation needs exist, this means that the wind farm needs to provide a certain reactive power to regulate the voltage and power balance of the grid at the same time as the active power. In the case that the reactive power regulation requirement is judged, the residual maximum reactive power margin range is further judged to ensure that the capacity limit of the converter is not exceeded when the reactive power is regulated by the wind farm. The converter has a certain reactive power regulation capacity, while the remaining maximum reactive margin range represents the currently adjustable reactive power range of the converter. If there is enough adjustment space in the remaining maximum reactive margin range, reactive target values can be issued in the range, so that the wind farm adjusts reactive power thereof to meet the requirements of the power grid. In this way voltage control and power balancing of the grid can be achieved. If the reactive power regulation requirement does not exist or the regulation requirement cannot be met within the range of the residual maximum reactive power margin, the wind power plant can continue to send out target active power and continue to meet the active power requirement of the power grid.
And a second judging step: when the target wind power plant has the conventional electricity limiting, the main economic loss in the same month of the last year is judged according to the data of the same month of the last year.
It should be noted that, the presence of the conventional electricity limiting indicates that the target wind power plant has low wind power consumption rate in the region, and at this time, it is required to determine whether the main economic loss in the same month of the previous year is the waste wind economic loss or the curve checking economic loss according to the data of the same month of the previous year.
Wherein, through analyzing the data of the same month of last year, can obtain useful information about aspects such as wind farm operation condition, generated energy, economic loss. These data may provide references to operational trends, power market conditions, and grid conditions for the month, helping decision makers to better understand and evaluate the current situation.
And a third calling step: when the main economic loss in the same month of the last year is the abandoned wind economic loss, the energy management time transfer function is preferentially invoked.
When the main economic loss in the same month of the last year is the waste wind economic loss, the waste wind economic loss is a main problem, and the energy management time transfer function is prioritized at this time, so that the economic loss in the waste wind condition is reduced.
Fourth calling step: when the main economic loss in the same month of the last year is the curve check economic loss, the power curve correction function is preferentially called.
When the main economic loss in the same month of the last year is the economic loss of the curve check, the curve check is the main problem, and the power curve correction function is prioritized to reduce the economic loss caused by the curve check.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: the intelligent wind power generation system can intelligently judge the current core demand of the wind power plant, and can set various different combined regulation modes, so that the regulation potential of the energy storage system is efficiently excited, the regulation scenes which can be dealt with are abundant, the energy waste is avoided, and the wind power energy storage efficiency and the income are improved.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a multifunctional coordination control device for a wind farm energy storage system, and as shown in fig. 3, a multifunctional coordination control device 20 for a wind farm energy storage system includes:
the construction module 201 is configured to divide the energy storage adjustment function according to the wind farm requirement, and construct a power curve correction function and an energy management time transfer function.
The first determining module 202 is configured to determine a current energy storage adjustment mode of the target wind farm.
The first invoking module 203 is configured to invoke an off-grid power supply function if an off-grid power supply requirement exists in the target wind farm when the current energy storage adjustment mode of the target wind farm is off-grid adjustment.
The obtaining module 204 is configured to obtain a conventional electricity limiting condition of the target wind farm when the current energy storage adjustment mode of the target wind farm is grid-connected adjustment.
The second invoking module 205 is configured to determine whether a temporary electricity limiting plan exists within a preset time period in the future when the target wind farm does not have conventional electricity limiting, and if so, invoke the energy management time transfer function preferentially, otherwise invoke the power curve correction function preferentially.
The second determining module 206 is configured to determine, when the target wind farm has the conventional electricity limit, a main economic loss in the same month of the previous year according to the data of the same month of the previous year.
And a third calling module 207, configured to call the energy management time transfer function preferentially when the main economic loss in the same month of the last year is the waste wind economic loss.
And a fourth calling module 208, configured to call the power curve correction function preferentially when the main economic loss in the same month of the last year is the curve checking economic loss.
In one possible implementation, the power curve correction function includes: the system comprises a power prediction tracking compensation module, a wind power energy storage frequency modulation module and an auxiliary spot transaction module. The energy management time transfer function includes: and the wind abandoning electricity limiting and adjusting module is relieved.
In one possible implementation, the specific steps of invoking the power curve correction function preferentially include:
a first judging sub-step: and judging whether the wind power generation power of the target wind power plant is smaller than the electric power for the station, and if so, calling a station electric regulation module. Otherwise, the next step is entered.
The first calling sub-step: and when the theoretical maximum active power of the target wind power plant is smaller than or equal to the power limit power of the power grid, any one module in the power curve correction function is called to perform power curve correction.
A first issuing substep: and issuing target active power.
In a possible implementation manner, after the first judging sub-step, the specific step of preferentially calling the power curve correction function further includes:
The second calling sub-step: and when the theoretical optimal active power of the target wind power plant is larger than the power limit power of the power grid, calling a relief wind abandon power limit adjusting module to store the redundant power generation amount.
In a possible implementation manner, after the first downlink sub-step, the specific step of preferentially calling the power curve correction function further includes:
And a third judging sub-step: judging whether reactive power regulation requirements exist or not, if so, issuing a reactive power target value in the range of the residual maximum reactive power margin of the converter; otherwise, continuing to issue the target active power.
In one possible implementation, the specific steps of preferentially invoking energy management time transfer functions include:
a second judging sub-step: and judging whether the wind power generation power of the target wind power plant is smaller than the electric power for the station, and if so, calling a station electric regulation module. Otherwise, the next step is entered.
A first acquisition sub-step: and acquiring a day-ahead power prediction curve of the target wind power plant relative to the next day.
A second acquisition sub-step: and obtaining a preset power limiting reference curve.
A third calling sub-step: and when the proportion of the pre-day power prediction curve above the preset power limiting reference curve exceeds a first preset proportion, calling a relief waste wind power limiting adjustment module, and storing the redundant power generation amount.
A second issuing substep: and issuing target active power.
In a possible implementation manner, the specific step of preferentially calling the energy management time transfer function after the second obtaining sub-step further includes:
Fourth calling sub-step: and when the proportion of the power prediction curve before the day below the preset power limiting reference curve exceeds a second preset proportion, invoking a power curve correction function.
In a possible implementation manner, after the second issuing sub-step, the specific step of preferentially calling the energy management time transfer function further includes:
Fourth judging sub-step: and judging whether reactive power regulation requirements exist, if so, issuing a reactive power target value in the range of the residual maximum reactive power margin of the converter. Otherwise, continuing to issue the target active power.
The multifunctional coordination control device 20 of the wind farm energy storage system provided by the invention can realize each process realized in the method embodiment, and in order to avoid repetition, the description is omitted here.
The virtual device provided by the invention can be a terminal, and can also be a component, an integrated circuit or a chip in the terminal.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: the intelligent wind power generation system can intelligently judge the current core demand of the wind power plant, and can set various different combined regulation modes, so that the regulation potential of the energy storage system is efficiently excited, the regulation scenes which can be dealt with are abundant, the energy waste is avoided, and the wind power energy storage efficiency and the income are improved.
Fig. 4 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 4, a terminal device 30 of this embodiment includes: a processor 300, a memory 301 and a computer program 302 stored in the memory 301 and executable on the processor 300, such as a multi-functional coordinated control method program for a wind farm energy storage system. The processor 300, when executing the computer program 302, implements the steps of the various embodiments of the multi-functional coordinated control method for wind farm energy storage systems described above. Or the processor 300, when executing the computer program 302, performs the functions of the units in the above-described apparatus embodiments.
By way of example, the computer program 302 may be partitioned into one or more units, one or more units being stored in the memory 301 and executed by the processor 300 to complete the present invention. One or more of the elements may be a series of computer program instruction segments capable of performing a specific function for describing the execution of the computer program 302 in a terminal device 30. For example, the specific functions of the computer program 302 that may be partitioned into modules are as follows:
The building module is used for dividing the energy storage adjusting function according to the wind farm requirements and building a power curve correcting function and an energy management time transfer function.
The first judging module is used for judging the current energy storage adjusting mode of the target wind power plant.
The first calling module is used for calling an off-grid power supply function if the off-grid power supply requirement exists in the target wind power plant when the current energy storage regulation mode of the target wind power plant is off-grid regulation.
The acquisition module is used for acquiring the conventional electricity limiting condition of the target wind power plant when the current energy storage regulation mode of the target wind power plant is grid-connected regulation.
And the second calling module is used for judging whether a temporary electricity limiting plan exists in a preset time length in the future when the target wind power plant does not have conventional electricity limiting, if so, preferentially calling the energy management time transfer function, and otherwise, preferentially calling the power curve correction function.
And the second judging module is used for judging the main economic loss in the same month of the last year according to the data of the same month of the last year when the target wind power plant has the conventional electricity limiting.
And the third calling module is used for preferentially calling the energy management time transfer function when the main economic loss in the same month of the last year is the abandoned wind economic loss.
And the fourth calling module is used for preferentially calling the power curve correction function when the main economic loss in the same month of the last year is the curve check economic loss.
Including but not limited to a processor 300 and a memory 301. It will be appreciated by those skilled in the art that fig. 4 is merely an example of one type of terminal device 30 and is not meant to be limiting as to one type of terminal device 30, and may include more or fewer components than shown, or may combine certain components, or different components, e.g., one type of terminal device may also include input and output devices, network access devices, buses, etc.
The Processor 300 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), off-the-shelf Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 301 may be an internal storage unit of the terminal device 30, such as a hard disk or a memory of the terminal device 30. The memory 301 may also be an external storage device of the terminal device 30, such as a plug-in hard disk, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD) or the like, which are provided on the terminal device 30. Further, the memory 301 may also include both an internal storage unit and an external storage device of the terminal device 30. The memory 301 is used to store a computer program and other programs and data required for a roaming control device. The memory 301 may also be used to temporarily store data that has been output or is to be output.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
It should be noted that, because the content of information interaction and execution process between the above devices/units is based on the same concept as the method embodiment of the present invention, specific functions and technical effects thereof may be referred to in the method embodiment section, and will not be described herein.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment 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, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present invention. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: the intelligent wind power generation system can intelligently judge the current core demand of the wind power plant, and can set various different combined regulation modes, so that the regulation potential of the energy storage system is efficiently excited, the regulation scenes which can be dealt with are abundant, the energy waste is avoided, and the wind power energy storage efficiency and the income are improved.
The embodiments of the present invention also provide a computer readable storage medium storing a computer program, which when executed by a processor implements steps of the above-described respective method embodiments.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: the intelligent wind power generation system can intelligently judge the current core demand of the wind power plant, and can set various different combined regulation modes, so that the regulation potential of the energy storage system is efficiently excited, the regulation scenes which can be dealt with are abundant, the energy waste is avoided, and the wind power energy storage efficiency and the income are improved.
Embodiments of the present invention provide a computer program product which, when run on a mobile terminal, causes the mobile terminal to perform steps that enable the implementation of the method embodiments described above.
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 present invention may implement all or part of the flow of the method of the above-described embodiments, and may be implemented by a computer program to instruct related hardware, and the computer program may be stored in a computer readable storage medium, where the computer program, when executed by a processor, may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, executable files or in some intermediate form, etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing device/terminal apparatus, recording medium, computer Memory, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), electrical carrier signals, telecommunications signals, and software distribution media. Such as a U-disk, removable hard disk, magnetic or optical disk, etc. In some jurisdictions, computer readable media may not be electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/network device and method may be implemented in other manners. For example, the apparatus/network device embodiments described above are merely illustrative, e.g., the division of modules or elements is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple elements 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 may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The elements illustrated as separate elements may or may not be physically separate, and elements shown as elements may or may not be physically located, or may be distributed over a plurality of network elements.
It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
As used in the present description and the appended claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to a detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is monitored" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon monitoring a [ described condition or event ]" or "in response to monitoring a [ described condition or event ]".
Furthermore, the terms "first," "second," "third," and the like in the description of the present specification and in the appended claims, are used for distinguishing between descriptions and not necessarily for indicating or implying a relative importance.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the invention. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
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, and are intended to be included in the scope of the present invention.
Claims (7)
1. A multifunctional coordination control method for an energy storage system of a wind farm is characterized by comprising the following steps:
The construction steps are as follows: divide energy storage regulatory function according to wind farm demand, constitute power curve correction function and energy management time transfer function, power curve correction function includes: the system comprises a power prediction tracking compensation module, a wind power energy storage frequency modulation module and an auxiliary spot transaction module, wherein the energy management time transfer function comprises the following steps: the wind-abandoning electricity limiting and adjusting module is relieved;
a first judging step: judging the current energy storage regulation mode of the target wind power plant;
The first calling step: when the current energy storage regulation mode of the target wind power plant is off-grid regulation, if the target wind power plant has off-grid power supply requirements, an off-grid power supply function is called;
The acquisition step: when the current energy storage regulation mode of the target wind power plant is grid-connected regulation, acquiring the conventional electricity limiting condition of the target wind power plant;
And a second calling step: when the target wind power plant does not have conventional electricity limiting, judging whether a temporary electricity limiting plan exists in a future preset time period, if so, preferentially calling the energy management time transfer function, and if not, preferentially calling the power curve correction function;
and a second judging step: when the target wind power plant has the conventional electricity limiting, judging economic loss in the same month of the last year according to the data of the same month of the last year;
And a third calling step: when the economic loss in the same month of the last year is the abandoned wind economic loss, preferentially calling the energy management time transfer function;
fourth calling step: when the economic loss in the same month of the last year is the economic loss of curve assessment, preferentially calling the power curve correction function;
The specific steps of calling the energy management time transfer function preferentially include:
A second judging sub-step: judging whether the wind power generation power of the target wind power plant is smaller than the electric power of a station, and if so, calling a station electric regulation module; otherwise, entering the next step;
a first acquisition sub-step: acquiring a day-ahead power prediction curve of the target wind power plant for the next day;
A second acquisition sub-step: acquiring a preset electricity limiting power reference curve;
A third calling sub-step: when the proportion of the daily power prediction curve above the preset power limiting reference curve exceeds a first preset proportion, invoking the relieving abandoned wind power limiting adjustment module to store redundant power generation;
A second issuing substep: issuing target active power;
the specific steps for calling the power curve correction function preferentially comprise:
A first judging sub-step: judging whether the wind power generation power of the target wind power plant is smaller than the electric power of a station, and if so, calling a station electric regulation module; otherwise, entering the next step;
the first calling sub-step: when the theoretical maximum active power of the target wind power plant is smaller than or equal to the power limiting power of the power grid, any one module in the power curve correction function is called to perform power curve correction;
A first issuing substep: and issuing target active power.
2. The method according to claim 1, wherein after the first determining sub-step, the specific step of preferentially calling the power curve correction function further comprises:
the second calling sub-step: and when the theoretical optimal active power of the target wind power plant is larger than the power grid electricity limiting power, the relief wind discarding electricity limiting adjusting module is called, and the surplus generated energy is stored.
3. The method according to claim 1, wherein after the first issuing sub-step, the specific step of preferentially calling the power curve correction function further comprises:
And a third judging sub-step: judging whether reactive power regulation requirements exist or not, if so, issuing a reactive power target value in the range of the residual maximum reactive power margin of the converter; otherwise, continuing to issue the target active power.
4. The method according to claim 1, wherein after the second obtaining sub-step, the specific step of preferentially invoking the energy management time transfer function further comprises:
fourth calling sub-step: and when the proportion of the day-ahead power prediction curve below the preset power limiting reference curve exceeds a second preset proportion, invoking the power curve correction function.
5. The method according to claim 1, wherein after the second issuing sub-step, the specific step of preferentially invoking the energy management time transfer function further comprises:
Fourth judging sub-step: judging whether reactive power regulation requirements exist or not, if so, issuing a reactive power target value in the range of the residual maximum reactive power margin of the converter; otherwise, continuing to issue the target active power.
6. A multifunctional coordination control device for a wind farm energy storage system, which is applied to the multifunctional coordination control method for the wind farm energy storage system according to claim 1, and is characterized by comprising the following steps:
The building module is used for dividing the energy storage adjusting function according to the wind farm requirements and building a power curve correcting function and an energy management time transfer function;
the first judging module is used for judging the current energy storage adjusting mode of the target wind power plant;
The first calling module is used for calling an off-grid power supply function if the off-grid power supply requirement exists in the target wind power plant when the current energy storage regulation mode of the target wind power plant is off-grid regulation;
the acquisition module is used for acquiring the conventional electricity limiting condition of the target wind power plant when the current energy storage regulation mode of the target wind power plant is grid-connected regulation;
the second calling module is used for judging whether a temporary electricity limiting plan exists in a preset time length in the future when the target wind power plant does not have conventional electricity limiting, if so, preferentially calling the energy management time transfer function, and otherwise, preferentially calling the power curve correction function;
the second judging module is used for judging the economic loss of the same month of the last year according to the data of the same month of the last year when the target wind power plant has the conventional electricity limiting;
The third calling module is used for preferentially calling the energy management time transfer function when the economic loss in the same month of the last year is the abandoned wind economic loss;
And the fourth calling module is used for preferentially calling the power curve correction function when the economic loss in the same month of the last year is the curve check economic loss.
7. Terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, realizes the steps of the method for the multi-functional coordinated control of a wind farm energy storage system according to any of claims 1 to 5.
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| CN112072655B (en) * | 2020-09-10 | 2022-05-27 | 天津大学 | Hybrid energy storage optimal configuration method for grid-connected wind energy storage power generation system |
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