CN117293864A - New energy power generation configuration energy storage power cooperative control method and system - Google Patents
New energy power generation configuration energy storage power cooperative control method and system Download PDFInfo
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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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
- H02J3/004—Generation forecast, e.g. methods or systems for forecasting future energy generation
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- 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
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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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
- 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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- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
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Abstract
The invention discloses a new energy power generation configuration energy storage power cooperative control method and a system, wherein the method comprises the following steps: the power cooperative control system is communicated with the station remote communication terminal RTU and the power prediction system to receive related control instructions; then calculating to obtain the power control total target instruction P according to different control function modes Σ The energy is transmitted to the new energy power generation unit energy management system and the energy storage energy management system in a communication mode through the station device; wherein the control function mode comprises AGC emergency direct modulation control of an energy storage system, primary frequency modulation control of an energy storage auxiliary station,The energy storage auxiliary station AGC control and the energy storage auxiliary station power prediction control have four functions; based on the new energy power generation operation state and the change of the power grid operation requirement, the automatic switching of the multifunctional control mode is realized, the adjustment performance of the new energy power generation active power and the value and income of the energy storage function are improved, and the safe and stable operation of the power grid is ensured.
Description
Technical Field
The invention belongs to the technical field of new energy power generation, and particularly relates to a new energy power generation configuration energy storage power cooperative control method and system.
Background
The new energy power generation is accessed into the power grid in a large scale, and has discontinuous and unstable unsteady state characteristics, so that certain challenges are brought to the safe and stable operation of the power grid. The novel energy storage technology gradually becomes a key ring for constructing a novel power system and pushing energy green low-carbon transformation by virtue of the advantages of flexible regulation capability and the like. The new energy power generation configuration energy storage system can improve the power output characteristic of new energy power generation, further alleviate the problem of unbalanced distribution of the electric power and the electric quantity of the electric power system in time and space, and is favorable for guaranteeing stable power supply and improving the power generation utilization rate of the new energy.
At present, a plurality of areas provide clear requirements for the energy storage capacity of the centralized new energy power generation grid-connected configuration, but the energy storage of the new energy power generation configuration is still in the initial development stage, and the problem of 'building but not using' exists in part of areas. Under the guidance of the existing market mechanism, the new energy power generation and energy storage system can be operated in a combined mode to obtain auxiliary service economic benefits by improving the power prediction accuracy, improving the station AGC, primary frequency modulation adjustment performance and the like, but most projects only realize single function adjustment, do not fully consider the influence of the new energy power generation operation state and the power grid operation demand change on the energy storage utilization rate, and cannot fully excite the value of various multiplexing functions of energy storage, so that the diversification of new energy power generation gain channels and the maximization of the energy storage function value are realized.
Therefore, how to perform multifunctional efficient cooperative control on the energy storage matched with new energy power generation becomes a technical problem to be solved.
Disclosure of Invention
The purpose is as follows: in view of at least one of the above technical problems, the invention provides a new energy power generation configuration energy storage power cooperative control method and system, which realize automatic switching of a multifunctional control mode based on the new energy power generation running state and the power grid running demand change, improve the new energy power generation active power regulation performance and the energy storage function value benefit, and ensure the safe and stable running of the power grid.
The technical scheme is as follows: in order to solve the technical problems, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a method for cooperatively controlling energy storage power of new energy power generation configuration, including:
step 1, a power cooperative control system and a station remote communication terminal RTU and a power prediction system carry out communication and receive related control instructions; then calculating to obtain the power control total target instruction P according to different control function modes Σ The energy is transferred to the energy management system and the energy storage of the new energy power generation unit by adopting a communication mode through the station deviceAn energy management system; the control function mode comprises four functions of energy storage system AGC emergency direct modulation control, energy storage auxiliary station primary frequency modulation control, energy storage auxiliary station AGC control and energy storage auxiliary station power prediction control;
step 2, dynamically collecting current and voltage of a grid connection point of a new energy station and a grid connection point in an energy storage system station, calculating active power of the grid connection point of the new energy station, power grid frequency and active power of the grid connection point in the energy storage system station in real time, sending the active power and the active power to a PMU substation of a new energy station synchronous phasor measurement unit, directly uploading the active power to a dispatching PMU master station through the PMU substation, and performing assessment calculation on all-station AGC, primary frequency modulation, power prediction and energy storage system AGC emergency direct regulation control performance;
step 3, designing a power cooperative control system, wherein the power cooperative control system comprises four functions of AGC emergency direct regulation control of an energy storage system, primary frequency modulation control of an energy storage auxiliary station, AGC control of the energy storage auxiliary station and power prediction control of the energy storage auxiliary station, and the system is independently or simultaneously put into a plurality of functional modules according to the running requirement of a new energy station, and automatically realizes function switching according to the power generation running state of the new energy and the running requirement change of a power grid;
step 4, under different control function modes, the power cooperative control system can automatically optimize distribution and issue to each power generation unit energy management system according to the new energy power generation unit and the energy storage running state, and each power generation unit energy management system can quickly receive and execute a power control instruction to realize the power adjustment cooperative control of the new energy station and the energy storage system; the control function mode comprises four functions of energy storage system AGC emergency direct modulation control, energy storage auxiliary station primary frequency modulation control, energy storage auxiliary station AGC control and energy storage auxiliary station power prediction control;
step 5, the power cooperative control system issues a control instruction P to the energy storage energy management system ES The system is constrained by the adjusting capacity of the energy storage system in the station and the capacity of primary equipment, so that the problem that the adjusting speed of the energy storage system cannot track the rapid change of an active instruction is avoided, and the safety problem of the energy storage system and a new energy station is avoided.
In some embodiments, the step 1 includes:
the power cooperative control system receives a total station AGC control and energy storage system AGC emergency direct-control remote regulation command issued by a dispatching master station through a station remote communication terminal RTU device, and a total station AGC request input and energy storage system AGC emergency direct-control request input remote control command signal;
forming power control total target instruction P according to related control function requirement Σ ；
Total target instruction P of power control of power cooperative control system Σ And calculating and distributing the power, transmitting the power to the energy management system and the energy storage energy management system of the new energy power generation unit, and finally realizing quick adjustment of the power by controlling the fans, the photovoltaic inverter and the energy storage PCS equipment in the station by the energy management systems.
In some embodiments, step 3 comprises: the power cooperative control system design comprises four functions of energy storage system AGC emergency direct modulation control, energy storage auxiliary station primary frequency modulation control, energy storage auxiliary station AGC control and energy storage auxiliary station power prediction control;
when more than two functions are put into operation, the system executes according to the priority order of the energy storage system AGC emergency direct modulation control > the energy storage auxiliary station primary frequency modulation control > the energy storage auxiliary station AGC control > the energy storage auxiliary station power prediction control.
Further, in some embodiments, after the energy storage system AGC emergency direct control function is put into operation, the power cooperative control system sends a signal that the energy storage system AGC emergency direct control function is put into operation to the dispatching master station through the station RTU, wherein the signal characterizes that the new energy station energy storage system has the AGC emergency direct control capability of the power grid dispatching mechanism; when the power grid fails or has operation risk hidden trouble, the dispatching master station sends an 'energy storage system AGC emergency direct-tuning request input' signal through the station RTU according to the state information sent by the energy storage system, the power cooperative control system receives an 'energy storage system AGC emergency direct-tuning request input' instruction, a new energy station operator operates an energy storage system AGC emergency direct-tuning function switching button in the system again, the power cooperative control system enters an energy storage system AGC emergency direct-tuning control mode, and the power cooperative control system controls according to the energy storage system AGCRemote control instruction P agc Active power P of grid-connected point in energy storage system station 0 ' calculating to obtain control target instruction P of energy storage system ES And the safe and stable operation of the power grid is ensured.
Further, in some embodiments, in the energy storage auxiliary station AGC control mode, the power cooperative control system is based on the total station AGC control command P AGC Active power P of total station grid connection point 0 And active power P of new energy station 0 "calculate power control total target instruction P Σ The method comprises the steps of carrying out a first treatment on the surface of the General target instruction P for power control Σ The energy management system of the new energy power generation unit is preferentially optimized and allocated to carry out active power adjustment, active power output of the new energy station is monitored in real time, and a control instruction P sent to the energy storage energy management system is dynamically corrected ES ＝P Σ -P 0 And the response speed and the accuracy of the total station AGC control are improved through the rapid adjustment of the energy storage system.
Further, in some embodiments, the energy storage auxiliary station primary frequency modulation control mode:
when the frequency of the power grid system is abnormal, the power cooperative control system calculates a primary frequency modulation load instruction delta P according to the active-frequency droop control according to a power grid frequency measured value f measured by the total station grid connection point:
wherein: ΔP is a primary frequency modulated power command (MW), f d For primary frequency modulation dead zone, P N Rated power (MW), f for new energy station N The frequency is the rated frequency (Hz) of the power grid system, delta is the differential rate (%), and f is the power grid frequency measured value;
according to the primary frequency modulation load command delta P and the total station AGC control command, calculating to obtain a power control total target command P Σ ；
The power cooperative control system prioritizes the power control total target instruction P Σ Active power adjustment is carried out by optimizing energy management systems distributed to new energy power generation units, active power output of new energy stations is monitored in real time, and dynamic repair is carried outControl instruction P issued to energy storage energy management system ES ＝P Σ -P 0 And the quick response of the total station primary frequency modulation is realized by the aid of the quick adjustment of the energy storage system.
Further, if the capacity of the energy storage system meets the requirement of primary frequency modulation capacity, the power cooperative control system responds to the primary frequency modulation load command Δp independently, and specifically includes:
during primary frequency modulation action, the new energy power generation unit locks the load change, and the energy storage system singly carries out primary frequency modulation dynamic response P ES And the energy storage millimeter-level quick response capability is fully exerted, so that the mechanical abrasion and electric quantity loss caused by the frequent participation of new energy power generation in primary frequency modulation of the power grid can be effectively reduced.
Further, in some embodiments, after the energy storage auxiliary station power prediction control function is put into operation, when the new energy station AGC is in the free power generation mode, the power cooperative control system automatically enters the energy storage auxiliary station power prediction control mode;
the power cooperative control system and the power prediction system communicate in real time in an sftp mode, and receives information transmitted by the power prediction system and reads a power prediction value PforecastAs a power control overall target instruction P Σ The energy storage system realizes accurate power prediction tracking and bidirectional energy output P according to the actual power input condition of new energy power generation ES ＝Pforecast－PCollectingline，Meanwhile, the power cooperative control system collects active power P of the line by using new energy power generationCollectinglineActive power P of energy storage grid-connected point 0 And (3) superposing and sending the superposition to the dispatching master station as a total station power prediction assessment calculation value.
In some embodiments, step 5, the power cooperative control system issues a control command P to the energy storage energy management system ES Shall be constrained by in-station energy storage system regulation capabilities, primary device capacity, including:
the power cooperative control system acquires the capacity of the energy storage system and the capacity state information of primary equipment from the energy storage energy management system;
calculating the maximum charging power allowable value P of the energy storage system according to the capacity of the energy storage system and the capacity state information of the primary equipment max-c And maximum discharge power allowable value P of energy storage system max-f ；
The control instruction of the energy storage energy management system should meet P max-c ≤P ES ≤P max-f The problem that the energy storage system and the new energy station have safety problems is avoided because the adjustment speed of the energy storage system cannot track the rapid change of the active instruction.
In a second aspect, the invention provides a new energy power generation configuration energy storage power cooperative control system, which comprises a power cooperative control system; the power cooperative control system is deployed on the upper layers of the new energy power generation unit energy management system and the energy storage energy management system, is respectively interacted with the station RTU, the new energy power generation unit energy management system and the energy storage energy management system, and is connected with the new energy station power prediction system; also comprises a processor and a storage medium;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method according to the first aspect.
The power cooperative control system is configured to:
dynamically collecting current and voltage of a grid-connected point of a new energy station, calculating active power of the grid-connected point and frequency of a power grid in real time, receiving an automatic power generation control AGC instruction of the whole station issued by a dispatching master station through a station RTU, dynamically correcting an energy storage power control target value according to the running state of a new energy power generation unit, and assisting in improving the power regulation performance of the whole station;
based on the measured power grid frequency, dynamically calculating a primary frequency modulation control instruction, and assisting the total station to quickly participate in primary frequency modulation response of the power grid;
acquiring a power prediction target value from a new energy station power prediction system, smoothing active power output of the new energy station when the new energy station is in a free power generation mode, assisting in improving power prediction precision, and reducing total station power prediction deviation assessment;
dynamically collecting current and voltage of grid-connected points in an energy storage system station, calculating active power of the grid-connected points of the energy storage system in real time, receiving an energy storage system AGC emergency direct-control instruction issued by a dispatching master station through a remote communication terminal RTU, and participating in the power grid AGC emergency direct-control under the special condition of power grid operation, so as to ensure safe and stable operation of the power grid;
the power cooperative control system forms power control instructions of the energy storage system from four modes of a dispatching master station, a new energy station power prediction system or local calculation, so that the active power regulation performance of the power grid is effectively improved.
In a third aspect, the present invention provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of the first aspect.
In a fourth aspect, the present invention provides an apparatus comprising,
one or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing any of the methods of the first aspect.
The beneficial effects are that: the new energy power generation configuration energy storage power cooperative control method, device, equipment and storage medium provided by the invention have the following advantages: aiming at the current situations that the matched energy storage application mode of the side of the new energy station is single, the economy is low, and the like, the advantages of quick response, accurate tracking, bidirectional energy output and the like of the energy storage are utilized, the power regulation performance of the new energy station is greatly improved, the impact and the influence of fluctuation of new energy power generation on a power grid are compensated, the economic benefit obtained by the new energy station when the new energy station participates in AGC, primary frequency modulation and power prediction and assessment of the power grid is effectively improved, the diversification of the new energy power generation income channel and the maximization of the energy storage function value are realized, and the method has important significance for improving the coordination capacity of the power grid and guaranteeing the safe and stable operation of the power grid.
Drawings
FIG. 1 is a schematic diagram of a topology architecture of a new energy side energy storage power adjustment cooperative control system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of new energy side energy storage grid-connected point information collection according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a control strategy of a new energy side energy storage power coordination control function according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Example 1
As shown in fig. 1, a set of new energy-energy storage power cooperative control system is established in a new energy station, the system is deployed at the upper layer of an energy management system of a new energy power generation unit and the energy storage energy management system, current and voltage of a grid-connected point of the new energy station are dynamically collected, real-time active power and grid frequency of the grid-connected point are calculated, an all-station AGC (Automatic Generation Control, automatic power generation control) control instruction issued by a dispatching master station is received through an RTU (Remote Terminal Unit) and a remote communication terminal, and an energy storage power control target value is dynamically corrected according to the running state of the new energy power generation unit to assist in improving the power regulation performance of the all-station; the system is also designed to dynamically calculate a primary frequency modulation control instruction based on the measured power grid frequency, and assist the total station to quickly participate in primary frequency modulation response of the power grid; meanwhile, the system also acquires a power prediction target value from the new energy station power prediction system, and when the new energy station is in a free power generation mode, the active power output of the new energy station is smoothed, the power prediction precision is improved in an auxiliary manner, and the total station power prediction deviation assessment is reduced; in addition, the system also dynamically collects current and voltage of grid connection points of the energy storage system in the station, calculates active power of the grid connection points of the energy storage system in real time, receives an AGC emergency direct-control instruction of the energy storage system issued by the dispatching master station through the RTU, participates in the AGC emergency direct-control of the power grid under the special condition of the power grid operation, and ensures the safe and stable operation of the power grid. In general, the method enables the power cooperative control system to form power control instructions of the energy storage system from four modes of a dispatching master station, a new energy station power prediction system or local calculation, thereby effectively improving the active power regulation performance of the power grid.
A new energy power generation configuration energy storage power cooperative control method comprises the following steps:
step 1, a power cooperative control system and a station remote communication terminal RTU and a power prediction system carry out communication and receive related control instructions; then calculating to obtain the power control total target instruction P according to different control function modes Σ The energy is transmitted to the new energy power generation unit energy management system and the energy storage energy management system in a communication mode through the station device; the control function mode comprises four functions of energy storage system AGC emergency direct modulation control, energy storage auxiliary station primary frequency modulation control, energy storage auxiliary station AGC control and energy storage auxiliary station power prediction control;
step 2, dynamically collecting current and voltage of a grid connection point of a new energy station and a grid connection point in an energy storage system station, calculating active power of the grid connection point of the new energy station, power grid frequency and active power of the grid connection point in the energy storage system station in real time, sending the active power and the active power to a PMU substation of a new energy station synchronous phasor measurement unit, directly uploading the active power to a dispatching PMU master station through the PMU substation, and performing assessment calculation on all-station AGC, primary frequency modulation, power prediction and energy storage system AGC emergency direct regulation control performance;
step 3, designing a power cooperative control system, wherein the power cooperative control system comprises four functions of AGC emergency direct regulation control of an energy storage system, primary frequency modulation control of an energy storage auxiliary station, AGC control of the energy storage auxiliary station and power prediction control of the energy storage auxiliary station, and the system is independently or simultaneously put into a plurality of functional modules according to the running requirement of a new energy station, and automatically realizes function switching according to the power generation running state of the new energy and the running requirement change of a power grid;
step 4, under different control function modes, the power cooperative control system can automatically optimize distribution and issue to each power generation unit energy management system according to the new energy power generation unit and the energy storage running state, and each power generation unit energy management system can quickly receive and execute a power control instruction to realize the power adjustment cooperative control of the new energy station and the energy storage system; the control function mode comprises four functions of energy storage system AGC emergency direct modulation control, energy storage auxiliary station primary frequency modulation control, energy storage auxiliary station AGC control and energy storage auxiliary station power prediction control;
step 5, the power cooperative control system issues a control instruction P to the energy storage energy management system ES The system is constrained by the adjusting capacity of the energy storage system in the station and the capacity of primary equipment, so that the problem that the adjusting speed of the energy storage system cannot track the rapid change of an active instruction is avoided, and the safety problem of the energy storage system and a new energy station is avoided.
In some embodiments, the step 1 includes:
the power cooperative control system receives a remote control command for controlling the Automatic Gain Control (AGC) of the whole station and an Automatic Gain Control (AGC) of the energy storage system, which are issued by the dispatching master station, through a remote communication terminal (RTU) device of the station in a mode of IEC104 protocol and the like, and inputs the AGC command signal for requesting the automatic gain control of the energy storage system;
forming power control total target instruction P according to related control function requirement Σ ；
Total target instruction P of power control of power cooperative control system Σ And calculating and distributing, rapidly issuing the calculated and distributed power to an energy management system and an energy storage energy management system of the new energy power generation unit through communication protocols such as GOOSE, and finally rapidly adjusting power by controlling equipment such as fans, photovoltaic inverters and energy storage PCS in the stations through the energy management systems.
Step 2 is shown in fig. 2. The power cooperative control system dynamically collects current and voltage information of the total station grid connection point of the new energy station and grid connection points in the energy storage system station, calculates active power and frequency of the total station grid connection points and active power of the grid connection points in the energy storage system station in real time, sends the active power and the active power to the PMU substation of the new energy station in a 26865.2 protocol or 4-20mA hard wiring mode and the like, and directly uploads the active power and the active power to the WAMS main station for performance assessment calculation of the total station AGC, primary frequency modulation, power prediction and energy storage system AGC emergency direct control.
In some embodiments, step 3 comprises: the power cooperative control system design comprises four functions of energy storage system AGC emergency direct modulation control, energy storage auxiliary station primary frequency modulation control, energy storage auxiliary station AGC control and energy storage auxiliary station power prediction control;
when more than two functions are put into operation, the system executes according to the priority order of the energy storage system AGC emergency direct modulation control > the energy storage auxiliary station primary frequency modulation control > the energy storage auxiliary station AGC control > the energy storage auxiliary station power prediction control.
Further, in some embodiments, after the energy storage system AGC emergency direct control function is put into operation, the power cooperative control system sends a signal that the energy storage system AGC emergency direct control function is put into operation to the dispatching master station through the station RTU, wherein the signal characterizes that the new energy station energy storage system has the AGC emergency direct control capability of the power grid dispatching mechanism; when the power grid has operation faults or hidden operational risks, the dispatching master station sends an 'energy storage system AGC emergency direct-tuning request input' signal through the station RTU according to the state information sent by the energy storage system, and after the power cooperative control system receives the 'energy storage system AGC emergency direct-tuning request input' instruction, new energy station operators operate the energy storage system AGC emergency in the system againThe direct-tuning function switching button is used for enabling the power cooperative control system to enter an energy storage system AGC emergency direct-tuning control mode, and a remote-tuning instruction P is controlled according to the energy storage system AGC agc Active power P of grid-connected point in energy storage system station 0 ' calculating to obtain control target instruction P of energy storage system ES And the safe and stable operation of the power grid is ensured.
Further, in some embodiments, in the energy storage auxiliary station AGC control mode, the power cooperative control system is based on the total station AGC control command P AGC Active power P of total station grid connection point 0 And active power P of new energy station 0 "calculate power control total target instruction P Σ The method comprises the steps of carrying out a first treatment on the surface of the General target instruction P for power control Σ The energy management system of the new energy power generation unit is preferentially optimized and allocated to carry out active power adjustment, active power output of the new energy station is monitored in real time, and a control instruction P sent to the energy storage energy management system is dynamically corrected ES ＝P Σ -P 0 And the response speed and the accuracy of the total station AGC control are improved through the rapid adjustment of the energy storage system.
Further, in some embodiments, the energy storage auxiliary station primary frequency modulation control mode:
when the frequency of the power grid system is abnormal, the power cooperative control system calculates a primary frequency modulation load instruction delta P according to the active-frequency droop control according to a power grid frequency measured value f measured by the total station grid connection point:
wherein: ΔP is a primary frequency modulated power command (MW), f d For primary frequency modulation dead zone, P N Rated power (MW), f for new energy station N The frequency is the rated frequency (Hz) of the power grid system, delta is the differential rate (%), and f is the power grid frequency measured value;
according to the primary frequency modulation load command delta P and the total station AGC control command, calculating to obtain a power control total target command P Σ ；
The power cooperative control system prioritizes the power control total target instruction P Σ Optimizing allocation toThe new energy power generation unit energy management system regulates active power, monitors active power output of the new energy station in real time, dynamically corrects a control instruction P issued to the energy storage energy management system ES ＝P Σ -P 0 And the quick response of the total station primary frequency modulation is realized by the aid of the quick adjustment of the energy storage system.
Further, if the capacity of the energy storage system meets the requirement of primary frequency modulation capacity, the power cooperative control system responds to the primary frequency modulation load command Δp independently, and specifically includes:
during primary frequency modulation action, the new energy power generation unit locks the load change, and the energy storage system singly carries out primary frequency modulation dynamic response P ES And the energy storage millimeter-level quick response capability is fully exerted, so that the mechanical abrasion and electric quantity loss caused by the frequent participation of new energy power generation in primary frequency modulation of the power grid can be effectively reduced.
Further, in some embodiments, after the energy storage auxiliary station power prediction control function is put into operation, when the new energy station AGC is in the free power generation mode, the power cooperative control system automatically enters the energy storage auxiliary station power prediction control mode;
the power cooperative control system and the power prediction system communicate in real time in an sftp mode, and receives information transmitted by the power prediction system and reads a power prediction value PforecastAs a power control overall target instruction P Σ The energy storage system realizes accurate power prediction tracking and bidirectional energy output P according to the actual power input condition of new energy power generation ES ＝Pforecast－PCollecting line，Meanwhile, the power cooperative control system collects active power P of the line by using new energy power generationCollecting lineActive power P of energy storage grid-connected point 0 And (3) superposing and sending the superposition to the dispatching master station as a total station power prediction assessment calculation value.
In the power auxiliary service assessment, the power prediction assessment can be generally divided into medium-short term and ultra-short term and other different assessment modes, and the power cooperative control system adopts a multi-objective optimization algorithm to automatically search according to different power grid assessment requirements and assessment calculation methods in different assessment modesOptimal power control total target instruction P Σ And the power prediction and assessment of the new energy station are reduced to the greatest extent in an auxiliary mode.
In the different control function modes described in step 4, the calculation and automatic switching of the power control total target command are shown in fig. 3. When any cooperative control function is not put into, the power cooperative control system is in a local control operation mode, and an operator can manually set and send power control instructions to the energy management systems of all the power generation units, so that the problem of flexible control of power adjustment of the new energy station in the case of failure or maintenance of part of the power generation units is solved.
In some embodiments, in step 5, to ensure the safety of the energy storage system during the rapid power adjustment, the power cooperative control system issues a control command P to the energy storage energy management system ES Shall be constrained by in-station energy storage system regulation capabilities, primary device capacity, including:
the power cooperative control system acquires the capacity of the energy storage system and the capacity state information of primary equipment from the energy storage energy management system;
calculating the maximum charging power allowable value P of the energy storage system according to the capacity of the energy storage system and the capacity state information of the primary equipment max-c And maximum discharge power allowable value P of energy storage system max-f ；
The control instruction of the energy storage energy management system should meet P max-c ≤P ES ≤P max And f, avoiding the rapid change that the adjustment speed of the energy storage system cannot track the active instruction and avoiding the safety problems of the energy storage system and the new energy station.
The technology of the invention can utilize the advantages of quick response, accurate tracking, bidirectional energy output and the like of the energy storage, assist the new energy station to greatly improve the power regulation performance, make up the impact and influence of fluctuation of new energy power generation on the power grid, effectively improve the economic benefit obtained by the new energy station when participating in AGC, primary frequency modulation and power prediction and assessment of the power grid, realize the diversification of new energy power generation gain channels and the maximization of the energy storage function value, and have important significance for improving the coordination capacity of the power grid and ensuring the safe and stable operation of the power grid.
Example 2
In a second aspect, as shown in fig. 1, the present embodiment provides a new energy power generation configuration energy storage power cooperative control system, including a power cooperative control system; the power cooperative control system is deployed on the upper layers of the new energy power generation unit energy management system and the energy storage energy management system, is respectively interacted with the station RTU, the new energy power generation unit energy management system and the energy storage energy management system, and is connected with the new energy station power prediction system; also comprises a processor and a storage medium;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method according to the first aspect.
The power cooperative control system is configured to:
dynamically collecting current and voltage of a grid-connected point of a new energy station, calculating active power of the grid-connected point and frequency of a power grid in real time, receiving an automatic power generation control AGC instruction of the whole station issued by a dispatching master station through a station RTU, dynamically correcting an energy storage power control target value according to the running state of a new energy power generation unit, and assisting in improving the power regulation performance of the whole station;
based on the measured power grid frequency, dynamically calculating a primary frequency modulation control instruction, and assisting the total station to quickly participate in primary frequency modulation response of the power grid;
acquiring a power prediction target value from a new energy station power prediction system, smoothing active power output of the new energy station when the new energy station is in a free power generation mode, assisting in improving power prediction precision, and reducing total station power prediction deviation assessment;
dynamically collecting current and voltage of grid-connected points in an energy storage system station, calculating active power of the grid-connected points of the energy storage system in real time, receiving an energy storage system AGC emergency direct-control instruction issued by a dispatching master station through a remote communication terminal RTU, and participating in the power grid AGC emergency direct-control under the special condition of power grid operation, so as to ensure safe and stable operation of the power grid;
the power cooperative control system forms power control instructions of the energy storage system from four modes of a dispatching master station, a new energy station power prediction system or local calculation, so that the active power regulation performance of the power grid is effectively improved.
Example 3
In a third aspect, the present embodiment provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method described in embodiment 1.
Example 4
In a fourth aspect, the present invention provides an apparatus comprising,
one or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing any of the methods described in embodiment 1.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (10)
1. The utility model provides a new forms of energy electricity generation configuration energy storage power cooperative control method which is characterized in that the method comprises the following steps:
step 1, a power cooperative control system and a station remote communication terminal RTU and a power prediction system carry out communication and receive related control instructions; then calculating to obtain the power control total target instruction P according to different control function modes Σ The energy is transmitted to the new energy power generation unit energy management system and the energy storage energy management system in a communication mode through the station device; the control function mode comprises four functions of energy storage system AGC emergency direct modulation control, energy storage auxiliary station primary frequency modulation control, energy storage auxiliary station AGC control and energy storage auxiliary station power prediction control;
step 2, dynamically collecting current and voltage of a grid connection point of a new energy station and a grid connection point in an energy storage system station, calculating active power of the grid connection point of the new energy station, power grid frequency and active power of the grid connection point in the energy storage system station in real time, sending the active power and the active power to a PMU substation of a new energy station synchronous phasor measurement unit, directly uploading the active power to a dispatching PMU master station through the PMU substation, and performing assessment calculation on all-station AGC, primary frequency modulation, power prediction and energy storage system AGC emergency direct regulation control performance;
step 3, designing a power cooperative control system, wherein the power cooperative control system comprises four functions of AGC emergency direct regulation control of an energy storage system, primary frequency modulation control of an energy storage auxiliary station, AGC control of the energy storage auxiliary station and power prediction control of the energy storage auxiliary station, and the system is independently or simultaneously put into a plurality of functional modules according to the running requirement of a new energy station, and automatically realizes function switching according to the power generation running state of the new energy and the running requirement change of a power grid;
step 4, under different control function modes, the power cooperative control system can automatically optimize distribution and issue to each power generation unit energy management system according to the new energy power generation unit and the energy storage running state, and each power generation unit energy management system can quickly receive and execute a power control instruction to realize the power adjustment cooperative control of the new energy station and the energy storage system; the control function mode comprises four functions of energy storage system AGC emergency direct modulation control, energy storage auxiliary station primary frequency modulation control, energy storage auxiliary station AGC control and energy storage auxiliary station power prediction control;
step 5, the power cooperative control system issues a control instruction P to the energy storage energy management system ES The system is constrained by the adjusting capacity of the energy storage system in the station and the capacity of primary equipment, so that the problem that the adjusting speed of the energy storage system cannot track the rapid change of an active instruction is avoided, and the safety problem of the energy storage system and a new energy station is avoided.
2. The method for collaborative control of energy storage power for new energy power generation configuration according to claim 1, wherein step 1 comprises:
the power cooperative control system receives a total station AGC control and energy storage system AGC emergency direct-control remote regulation command issued by a dispatching master station through a station remote communication terminal RTU device, and a total station AGC request input and energy storage system AGC emergency direct-control request input remote control command signal;
forming power control total target instruction P according to related control function requirement Σ ；
Total target instruction P of power control of power cooperative control system Σ And calculating and distributing the power, transmitting the power to the energy management system and the energy storage energy management system of the new energy power generation unit, and finally realizing quick adjustment of the power by controlling the fans, the photovoltaic inverter and the energy storage PCS equipment in the station by the energy management systems.
3. The method for collaborative control of energy storage power for new energy power generation configuration according to claim 1, wherein step 3 comprises: the power cooperative control system design comprises four functions of energy storage system AGC emergency direct modulation control, energy storage auxiliary station primary frequency modulation control, energy storage auxiliary station AGC control and energy storage auxiliary station power prediction control;
when more than two functions are put into operation, the system executes according to the priority order of the energy storage system AGC emergency direct modulation control > the energy storage auxiliary station primary frequency modulation control > the energy storage auxiliary station AGC control > the energy storage auxiliary station power prediction control.
4. The cooperative control method of energy storage power of new energy power generation configuration according to claim 3, wherein after the AGC emergency direct-control function of the energy storage system is put into operation, the cooperative control system of power sends a signal of 'the AGC emergency direct-control function of the energy storage system is put into operation' to the dispatching master station through the station RTU, and the signal characterizes that the energy storage system of the new energy station has the AGC emergency direct-control capability of the power grid dispatching mechanism; when the power grid operation faults or hidden operational risks exist, the scheduling master station sends an 'energy storage system AGC emergency direct-tuning request input' signal through the station RTU according to the state information sent by the energy storage system, after the power cooperative control system receives an 'energy storage system AGC emergency direct-tuning request input' instruction, a new energy station operator operates an energy storage system AGC emergency direct-tuning function switching button in the system again, the power cooperative control system enters an energy storage system AGC emergency direct-tuning control mode, and remote-tuning instruction P is controlled according to the energy storage system AGC agc Energy storageActive power P of grid-connected point in system station 0 ' calculating to obtain control target instruction P of energy storage system ES And the safe and stable operation of the power grid is ensured.
5. The method for collaborative control of energy storage power of a new energy power generation configuration according to claim 3 wherein the power collaborative control system is based on a total station AGC control command P in an energy storage auxiliary station AGC control mode AGC Active power P of total station grid connection point 0 And active power P of new energy station 0 "calculate power control total target instruction P Σ The method comprises the steps of carrying out a first treatment on the surface of the General target instruction P for power control Σ The energy management system of the new energy power generation unit is preferentially optimized and allocated to carry out active power adjustment, active power output of the new energy station is monitored in real time, and a control instruction P sent to the energy storage energy management system is dynamically corrected ES ＝P Σ -P 0 And the response speed and the accuracy of the total station AGC control are improved through the rapid adjustment of the energy storage system.
6. The method for collaborative control of energy storage power for new energy power generation configuration according to claim 3, wherein the primary frequency modulation control mode of the energy storage auxiliary station:
when the frequency of the power grid system is abnormal, the power cooperative control system calculates a primary frequency modulation load instruction delta P according to the active-frequency droop control according to a power grid frequency measured value f measured by the total station grid connection point:
wherein: ΔP is a primary frequency modulation power command, f d For primary frequency modulation dead zone, P N Rated power for new energy station, f N The method is characterized in that the method is used for rated frequency of a power grid system, delta is a gap adjustment rate, and f is a power grid frequency measured value;
according to the primary frequency modulation load command delta P and the total station AGC control command, calculating to obtain a power control total target command P Σ ；
Power cooperative controlThe control system prioritizes the power control overall target instruction P Σ Active power adjustment is carried out by optimizing energy management systems distributed to new energy power generation units, and active power P of new energy stations is monitored in real time 0 "output, dynamic correction and issue to the control command P of the energy storage energy management system ES ＝P Σ -P 0 And the quick response of the total station primary frequency modulation is realized by the aid of the quick adjustment of the energy storage system.
7. The method for collaborative control of energy storage power of a new energy power generation configuration according to claim 6, wherein if the capacity of the energy storage system meets the primary frequency modulation capacity requirement, the power collaborative control system responds to the primary frequency modulation load command Δp alone, comprising:
during primary frequency modulation action, the new energy power generation unit locks the load change, and the energy storage system singly carries out primary frequency modulation dynamic response P ES And the energy storage millimeter-level quick response capability is fully exerted, so that the mechanical abrasion and electric quantity loss caused by the frequent participation of new energy power generation in primary frequency modulation of the power grid can be effectively reduced.
8. The method for collaborative control of power generation configuration of new energy according to claim 3, wherein the power collaborative control system automatically enters the power predictive control mode of the auxiliary energy station when the AGC operation of the new energy station is in the free power generation mode after the power predictive control function of the auxiliary energy station is put into operation;
the power cooperative control system and the power prediction system communicate in real time in an sftp mode, and receives information transmitted by the power prediction system and reads a power prediction value PforecastAs a power control overall target instruction P Σ The energy storage system realizes accurate power prediction tracking and bidirectional energy output P according to the actual power input condition of new energy power generation ES ＝Pforecast－PCollecting line，Meanwhile, the power cooperative control system collects active power P of the line by using new energy power generationCollecting lineActive power P of energy storage grid-connected point 0 ' overlap as a total station workAnd the rate prediction check calculated value is sent to the dispatching master station.
9. The method for collaborative control of energy storage power of a new energy power generation configuration according to claim 1, wherein the step 5 is characterized in that the power collaborative control system issues a control instruction P to the energy storage energy management system ES Shall be constrained by in-station energy storage system regulation capabilities, primary device capacity, including:
the power cooperative control system acquires the capacity of the energy storage system and the capacity state information of primary equipment from the energy storage energy management system;
calculating the maximum charging power allowable value P of the energy storage system according to the capacity of the energy storage system and the capacity state information of the primary equipment max-c And maximum discharge power allowable value P of energy storage system max-f ；
The control instruction of the energy storage energy management system should meet P max-c ≤P ES ≤P max-f The problem that the energy storage system and the new energy station have safety problems is avoided because the adjustment speed of the energy storage system cannot track the rapid change of the active instruction.
10. The new energy power generation configuration energy storage power cooperative control system is characterized by comprising a power cooperative control system; the power cooperative control system is deployed on the upper layers of the new energy power generation unit energy management system and the energy storage energy management system, is respectively interacted with the station RTU, the new energy power generation unit energy management system and the energy storage energy management system, and is connected with the new energy station power prediction system; also comprises a processor and a storage medium;
the storage medium is used for storing instructions;
the processor being operative according to the instructions to perform the steps of the method according to any one of claims 1 to 9.
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