CN118137586B - Method and equipment for distributing power among multi-machine hydropower station units containing hydropower cells - Google Patents
Method and equipment for distributing power among multi-machine hydropower station units containing hydropower cells Download PDFInfo
- Publication number
- CN118137586B CN118137586B CN202410550888.XA CN202410550888A CN118137586B CN 118137586 B CN118137586 B CN 118137586B CN 202410550888 A CN202410550888 A CN 202410550888A CN 118137586 B CN118137586 B CN 118137586B
- Authority
- CN
- China
- Prior art keywords
- unit
- power
- hydropower
- real
- units
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 62
- 230000009194 climbing Effects 0.000 claims abstract description 54
- 238000009826 distribution Methods 0.000 claims abstract description 43
- 238000004590 computer program Methods 0.000 claims description 15
- 238000004088 simulation Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000003860 storage Methods 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 230000033228 biological regulation Effects 0.000 claims description 5
- 238000011217 control strategy Methods 0.000 claims description 5
- 230000006870 function Effects 0.000 claims description 5
- 238000005457 optimization Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000004422 calculation algorithm Methods 0.000 claims description 2
- 238000005094 computer simulation Methods 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000004044 response Effects 0.000 description 13
- 238000004891 communication Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000002222 downregulating effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003828 downregulation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000003827 upregulation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Abstract
The invention relates to an active control technology of an electric power system, in particular to a method and equipment for distributing power among a plurality of hydropower station units containing hydropower batteries, wherein the method comprises the steps of obtaining all-condition climbing speed distribution conditions of different types of units; calculating the real-time adjustable capacity of each unit according to the basic information and the real-time running state of each unit; and carrying out coordination control among units according to an adjustable capacity proportion or a linear programming method. The hydropower-battery combined operation unit adopts a differential compensation control mode to enable the battery energy storage system to assist the hydropower unit in power adjustment, and the conventional hydropower unit operates in a conventional secondary frequency modulation control mode. The coordination controller among the units distributes power among the units by adopting a linear programming method based on respective real-time climbing rates of different units so as to ensure that the rapid adjustment capability of the combined operation units is fully exerted. The method can pertinently adjust the power distribution strategy according to the adjustment capability of each unit so as to exert the adjustment capability of each unit to the maximum extent.
Description
Technical Field
The invention belongs to the technical field of active control of power systems, and particularly relates to a method and equipment for distributing power among multiple hydropower station units containing hydropower batteries.
Background
At present, the development scale and speed of intermittent renewable energy sources represented by wind energy and solar energy are continuously increased, and the structure of an electric power system is greatly changed. As one of the dominant regulating power sources in the power system, the hydropower station will take on more new energy consumption tasks, and in the future, the regulator attribute will be more remarkable, and even surpass the power source attribute, which brings new requirements and challenges to flexible regulation, operation and maintenance modes and development directions of hydropower. Therefore, the method has important significance in developing the flexible transformation technology of the hydroelectric system for better power grid auxiliary service. Currently, research and development of new hydropower technologies in various countries is mainly focused on variable-speed pumped storage technology. The full-power variable-flow variable-speed technology can be modified on the existing conventional pumping and storage unit, and the method has remarkable benefit for improving the flexibility of the pumping and storage unit. However, it is also a viable approach to improve regulatory flexibility through integration with fast response energy storage systems in the face of most conventional hydroelectric power plants, especially large hydroelectric power plants with huge stand-alone capacities. In general, hydropower stations can take one or more units in the station as targets to conduct test point research on hydropower-battery combined operation units, and how to integrate the novel unit into a traditional control framework mainly comprising a conventional hydropower unit is a question for currently promoting hydropower flexibility transformation process to be answered urgently.
As far as research objects are concerned, the prior art research focuses on the control strategy of the hydropower station and the station side of the energy storage battery system or the unit side of the hydropower-battery combined operation unit, and the inter-unit coordination control in the hydropower station is not considered. For research purposes, most of the power distribution among units in hydropower stations is studied on a scheduling scale, and aims at minimizing water consumption, maximizing new energy consumption rate, maximizing comprehensive economic benefit and the like, however, flexible modification of hydropower is carried out for the purposes of improving hydropower response performance and reducing unit wear, and targeted analysis is required on a control time scale based on real-time response characteristics thereof. Regarding the control framework, if the flexibility transformation of the hydroelectric generating set is considered, the coordinated operation of the novel generating set and the conventional generating set is considered, and on the basis of not greatly adjusting the original control structure, the adjustment advantage of the transformed generating set is fully exerted, so that the maximization of the overall performance of the power station is realized.
Disclosure of Invention
The invention provides a method and equipment for distributing power among a plurality of hydropower stations containing hydropower batteries, which fully considers dynamic response characteristics among different units, in particular to the power response characteristics of the hydropower-battery combined operation unit after auxiliary battery transformation aiming at a plurality of hydropower stations simultaneously provided with a conventional hydropower unit and a hydropower-battery combined operation unit. The method can effectively exert the quick action advantage of the combined operation unit, and help the hydropower station to maximize the climbing speed of the hydropower station so as to furthest help the hydropower station exert the due function in the modernization process of the electric power system.
The invention provides a method for distributing power among a plurality of hydropower station units containing hydropower cells, which comprises the following steps:
S1, acquiring the all-condition climbing rate distribution conditions of different types of units;
s2, calculating the real-time adjustable capacity of each unit according to the basic information and the real-time running state of each unit;
S3, coordination control among units is carried out according to an adjustable capacity proportion or a linear programming method.
According to the method for distributing power among the units of the multi-machine hydropower station with the water power-battery, which is provided by the invention, the method for obtaining the all-condition climbing rate distribution condition of the units of different types comprises the following steps:
S1.1: acquiring the all-condition climbing speed distribution condition of a conventional hydroelectric generating set;
s1.1.1: obtaining any initial output level of a conventional hydroelectric generating set through model experiments or numerical simulation The following power adjustment instructions with different amplitudesReal-time ramp rate at timeClimbing rate of unitDefined as the power variation range of the unit per second, with the unit being；
S1.1.2: making a two-dimensional interpolation table of the climbing rate of the hydroelectric generating set through experimental and simulation data, namelyWherein the superscriptRepresenting the first in the power plantA conventional hydroelectric generating set;
S1.2: acquiring the full-working-condition climbing rate distribution condition of the hydropower-battery combined operation unit;
S1.2.1: ensuring that the hydropower-battery combined operation unit operates in a secondary frequency modulation control mode, wherein in the process of responding to a power command, the actual output power of the hydropower unit With target instructionsThe existing difference is quickly compensated by the auxiliary battery in real time. Establishing a dynamic simulation model of the hydropower-battery combined operation unit, and acquiring any initial output level of the combined operation unit in a numerical simulation modeNext, power adjustment commands of different magnitudes are facedReal-time ramp rate at time；
S1.2.2: the two-dimensional interpolation table of the climbing rate of the hydropower-battery combined operation unit is manufactured through the simulation data, namelyWherein the superscriptRepresenting the first in the power plantA combined operation unit;
The method for distributing power among the units of the multi-machine hydropower station with the water power and the batteries, which is provided by the invention, calculates the real-time adjustable capacity of each unit according to the basic information and the real-time running state of each unit, and comprises the following steps:
s2.1: basic information of each unit is obtained, including maximum output limit of each unit Minimum force limitAnd the current initial power. Assuming a common in the power stationConventional machine set and J-table combined machine set ""Use""Representation" of ""When referring to the first of the power plantsA conventional unit; when (when) ""Use""Representation" of ""When referring to the first place in a power plantA table combination unit;
S2.2: setting the issuing time interval of AGC control command Inputting a power control command of the hydropower station, temporarily not considering the influence of AGC delay, and then obtaining the plant-level AGC control command deviation of the hydropower station in the current calculation step；
S2.3: calculating the adjustable capacity of each unit：
For the firstConventional hydroelectric generating set:
For the first Station water electricity-battery combined operation unit:
s2.4: and performing power distribution among units according to the adjustable capacity proportion, and then currently calculating power instructions of each unit in the step length as follows:
For the first Conventional hydroelectric generating set:
for the current calculation step length according to the adjustable capacity proportion A power instruction of a conventional hydroelectric generating set;
For the first Station water electricity-battery mixed operation unit:
for the current calculation step length according to the adjustable capacity proportion And (5) a power instruction of the combined operation unit of the station water power and the battery.
According to the method for distributing power among the units of the multi-machine hydropower station containing the hydropower cells, which is provided by the invention, the coordination control among the units is carried out according to the adjustable capacity proportion or the linear programming method, and the method comprises the following steps:
S3.1: interpolation calculation is carried out to obtain real-time climbing rate of each unit, and conventional unit power instructions distributed according to adjustable capacity proportion are based And the current initial power of the conventional unitAccording to the two-dimensional interpolation table obtained in the above steps S1.1.2 and S1.2.2 in S1, the first instruction can be obtained by linear interpolationReal-time climbing speed of conventional machine set; Similarly, the power instruction of the combined unit based on the allocation according to the adjustable capacity proportionAnd the current initial power of the combined unitInterpolation can obtain the firstReal-time climbing speed of combined unitThe absolute value of the climbing rate is taken here, i.e. the climbing rate is positive whether up or down;
s3.2: judging whether each unit meets the current regulation capacity or not, and if the unit meets the following expression:
The unit can meet the capacity requirement and the climbing rate requirement of the AGC control command under the original control strategy, and the output power command can be issued to each unit without carrying out additional power distribution again; if the conditions are not satisfied, each unit needs to carry out power distribution again, and the following steps are continuously executed;
And S3.3, performing inter-unit coordination control based on linear programming, wherein in a normal case, the condition is triggered only because the conventional hydroelectric generating set cannot meet the climbing rate requirement, so that the advantage of quick response of the combined operation generating set is utilized to the maximum extent within the constraint condition range by formulating a related strategy. Therefore, the optimal configuration target at the moment is set as the error of tracking the AGC power command The minimum, i.e. objective function is:
the constraint is mainly dependent on "power supply frequency modulation capability", i.e. the first Bench conventional hydroelectric generating set and firstThe power regulation range and the climbing range allowed by the combined operation unit of the water station and the power battery at the current moment are adopted, so that the constraint condition of the optimization problem is taken as an expression described in S3.2. Because the objective function is a primary function and accords with the standard form of the linear programming problem, the problem is optimally solved by adopting a linear programming algorithm, and the objective power of each unit after optimization is obtained;
and S3.4, issuing a secondary frequency modulation real-time control instruction to each unit, wherein each unit performs real-time power-frequency control on the unit level according to the S3.1-S3.3, and the sum of the output power of each unit jointly responds to a station level power instruction aiming at the whole hydropower station.
The invention also provides electronic equipment, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the method for distributing power among the multi-machine hydropower station units containing the water-containing electric cells when executing the program.
The invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which when executed by a processor implements a method of power distribution between multiple hydropower station units of a hydro-electric-battery as described in any one of the above.
The invention also provides a computer program product comprising a computer program which when executed by a processor implements a method of power distribution between multiple hydropower station units comprising an hydro-electric-battery as described in any one of the above.
Compared with the prior art, the invention has the beneficial effects that: the method for distributing power among the multi-machine hydropower station units containing the hydropower cells considers the power instruction coordination distribution of the conventional hydropower station unit and the hydropower-cell combined operation unit in the same hydropower station for the first time. The method fully considers the power quick response characteristic of the hydropower-battery combined operation unit in the full working condition range, calculates the adjustment capacity of the hydropower-battery combined operation unit in real time by monitoring the operation state of each unit, including the adjustable capacity range and the climbing rate, and accordingly adjusts the power distribution strategy according to the adjustment capacity of each unit in a targeted manner so as to exert the adjustment capacity of each unit to the maximum extent. The method can effectively coordinate the conventional units and the combined operation units in the power station, and jointly improve the overall dynamic performance of the hydropower station.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a multi-machine hydropower station model framework including a combined operation unit according to an embodiment of the invention;
FIG. 2 is a schematic diagram of the distribution of all-condition climbing rates of a conventional hydroelectric generating set according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the gradient rate increasing distribution of the hydropower-battery combined operation unit relative to the conventional hydropower unit according to the embodiment of the invention;
FIG. 4 (a) is a time domain output curve of each unit before and after a conventional method for distributing power between units in a power station according to an embodiment of the present invention;
FIG. 4 (b) is a time domain output curve of each unit before and after the power distribution method between units after the embodiment 1# unit is modified into the water-electricity-battery combined unit under a certain working condition;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;
Reference numerals:
Wherein: 810-processor, 820-communication interface, 830-memory, 840-communication bus.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The power distribution method among the multi-machine hydropower station units containing the hydropower-battery aims at the multi-machine hydropower station containing the hydropower-battery combined operation unit, aims at the minimum power control deviation, and establishes an active power instruction distribution strategy between the combined operation unit and the conventional hydropower station unit. Because the hydropower station responds to the station-level power instruction and is actually the AGC control and coordination process of each unit, each hydropower unit actually operates in a secondary frequency modulation control mode. The hydropower-battery combined operation unit adopts a differential compensation control mode to enable the battery energy storage system to assist the hydropower unit in power adjustment, and the conventional hydropower unit operates in a conventional secondary frequency modulation control mode. The coordination controller among the units distributes power among the units by adopting a linear programming method based on respective real-time climbing rates of different units so as to ensure that the rapid adjustment capability of the combined operation units is fully exerted. Compared with the prior art, the method fully considers the response characteristics of different hydroelectric units in the multi-machine hydropower station and the running states of the units in the real-time control process, and simultaneously provides a technical thought for the novel hydropower station combined operation unit to be integrated into the control operation framework of the traditional hydropower station as the method aims at the novel hydroelectric unit technology of the hydroelectric-battery combined operation unit.
Examples
The method of the invention is described in detail by performing inter-unit power distribution on 4 hydropower stations comprising 1 hydropower-battery combined operation unit and 3 conventional hydropower units:
The embodiment will be described based on a simulation model of a multi-energy complementary energy base containing a plurality of hydropower stations, the base being connected to an external grid by means of tie lines, and assuming that one of the hydropower stations contains the novel hydropower-battery combined operation unit. In the virtual simulation system, a multifunctional complementary energy base comprises a hydropower station, a thermal power station, a photovoltaic power station and a wind power station, wherein the capacity of the target hydropower station is 1000MW, the target hydropower station comprises 4 250MW mixed-flow hydroelectric generating sets, and a 5MW battery energy storage system is connected in parallel to the side of the 1# set for auxiliary adjustment. A multi-machine hydropower station model frame containing a combined operation unit is shown in FIG. 1, where 。
Firstly, acquiring the all-condition climbing speed distribution conditions of different types of units;
The embodiment constructs a one-dimensional transient process simulation model of the hydroelectric generation system based on the characteristic curve of the hydroelectric generating set of the large hydroelectric generating set actually operated by a certain power station and actual engineering parameters, and can manufacture a two-dimensional interpolation table of the climbing rate of the hydroelectric generating set by carrying out full-working-condition numerical simulation on the hydroelectric generating set operated in a power control mode, namely And further, the full-working-condition climbing speed distribution condition of the conventional hydroelectric generating set is drawn, and the full-working-condition climbing speed distribution condition is shown in fig. 2. The graph shows the climbing speed distribution condition of a conventional hydroelectric generating set: in general, the unit turndown speed is slightly greater than its turnup speed, while the unit ramp rate increases as the adjustment amplitude increases and reaches a local maximum with the adjustment amplitude being approximately equal to half the adjustment margin.
And secondly, establishing a hydropower-battery combined operation unit simulation model under a secondary frequency modulation control mode, wherein a battery energy storage system adopts a power compensation control strategy, namely, a conventional hydropower unit responds to a power instruction first, and the battery energy storage system compensates the difference between the actual power and the target power. Because the AGC control process of the unit is equivalent to step response in a fixed interval time period, the full-working-condition climbing speed distribution of the combined operation unit is obtained by adopting a full-working-condition numerical simulation method for the conventional hydroelectric unit in a similar way. The two-dimensional interpolation table of the climbing rate of the hydropower-battery combined operation unit can be manufactured through the simulation data, namelyAnd further, the climbing rate of the combined operation unit is drawn to be increased relative to that of the conventional hydroelectric unit, and the climbing rate is shown in figure 3. In order to make the display more visual, the upper limit of the color band is 100% in fig. 3, and the working condition with larger partial lifting amplitude cannot be displayed in a thermal graph, in fact, the average climbing rate amplitude is improved by almost an order of magnitude, especially in the instruction range of +/-0.02 p.u. of a white dotted line frame. Generally, when the power command amplitude is smaller, the climbing rate is obviously improved, and the climbing rate can be basically up to 100% or more; for the working condition that the adjusting amplitude is approximately equal to half of the adjusting margin, the average climbing rate has the weakest lifting effect.
Calculating the real-time adjustable capacity of each unit according to the basic information and the real-time running state of each unit;
in the embodiment, a total of 3 conventional hydroelectric units and 1 combined operation unit are arranged in the target hydroelectric station, and the maximum output limit of the 3 conventional units is taken as The minimum output limit is taken as; The maximum output of 1 combined operation unit is limited to the sum of the maximum output of the conventional hydroelectric unit and the maximum output of the battery energy storage system, and the rated power of the auxiliary battery energy storage system is 5MWMinimum output limit of the same-principle combined operation unit is taken as。
The current initial power of each unit is taken as. In addition, the present embodiment sets the issue time interval of the AGC control instruction=15S. In the initial calculation step length, the up-regulating capacity of 3 conventional units is 30MW, the down-regulating capacity is 220MW, and the up-regulating capacity of the combined operation unit is 35MW, and the down-regulating capacity is 225MW. In the subsequent calculation step length, the real-time adjustable capacity of each unit in each step length can be calculated in the same way.
Performing coordination control among units according to an adjustable capacity proportion or a linear programming method;
in the face of the AGC control instruction issued by the superior dispatching mechanism, firstly, the power target of each unit in the current step length is calculated according to the adjustable capacity proportion of each unit. As for the initial step, each conventional hydroelectric generating set will take on Up-regulation of power response task at station side, whereas the combined hydro-electric-battery unit will take onStation side up-regulating power response tasks; in the face of the power down command, each conventional hydroelectric generating set will bearIs to take on the hydropower-battery combined unit to carry out the task of power response down-regulation on the station sideIs to down-regulate the power response task. The initial power allocation strategy in the subsequent time step will be calculated with such a push line.
Meanwhile, the climbing rate of the unit corresponding to the current moment can be calculated by interpolating the calculated power target value and the current power value of the unit. Judging the capacity requirement and the climbing rate requirement of each unit at the current moment according to the power demand, if the conditions are met, indicating that the hydropower station can respond to the power command in the current step length according to the current inter-unit power distribution strategy, and sending the power target of each unit to the unit as an actual working power target value for adjustment; if the conditions are not satisfied, the maximum utilization of the quick action of each unit is needed in the range of the maximum capacity and the climbing speed, so the power distribution of the units can be carried out by solving the following linear programming problem:
the obtained target power of each unit can be used as the target value of the actual working power to be issued to each unit for adjustment.
Fig. 4 (a) is a time domain output curve of each unit before and after a unit time power distribution method of a conventional hydroelectric unit in a power station, and fig. 4 (b) is a time domain output curve of each unit before and after a unit time power distribution method of a hydroelectric-battery combined unit after a # 1 unit is modified into a certain working condition. The coordination control strategy between the fast and slow units plays a role. In the time of about 50 s-450 s, the conventional unit can be normally regulated within the climbing rate range, and the combined unit fully exerts excellent quick action and bears most of power regulation tasks. And the combined unit can almost respond instantaneously in face of various power instructions, so that the integral power tracking capability of the hydropower station is remarkably improved.
Fig. 5 illustrates a physical schematic diagram of an electronic device, as shown in fig. 5, which may include: processor 810, communication interface (Communications Interface) 820, memory 830, and communication bus 840, wherein processor 810, communication interface 820, memory 830 accomplish communication with each other through communication bus 840. The processor 810 may invoke logic instructions in the memory 830 to perform the hydro-battery inter-multi-hydropower station unit power distribution method.
Further, the logic instructions in the memory 830 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program, the computer program being storable on a non-transitory computer readable storage medium, the computer program, when executed by a processor, being capable of performing the method of power distribution between multiple hydropower station units of a hydro-electric-battery provided by the methods described above.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the method of power distribution between multiple hydropower station units of a hydro-battery provided by the methods described above.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The method for distributing power among the multi-machine hydropower station units containing the hydropower cells is characterized by comprising the following steps of:
S1, acquiring all-condition climbing speed distribution conditions of different types of units, wherein the method specifically comprises the following steps of:
S1.1, acquiring the all-condition climbing speed distribution condition of a conventional hydroelectric generating set;
S1.2, acquiring the all-condition climbing rate distribution condition of the hydropower-battery combined operation unit;
s2, calculating the real-time adjustable capacity of each unit according to the basic information and the real-time running state of each unit;
s3, performing coordination control among units according to an adjustable capacity proportion or a linear programming method;
s3.1, obtaining real-time climbing rate of each unit through interpolation calculation, and based on conventional unit power instructions distributed according to adjustable capacity proportion And the current initial power of the conventional unitAccording to the obtained two-dimensional interpolation table of the climbing rate of the hydroelectric generating set and the two-dimensional interpolation table of the climbing rate of the combined operation set, obtaining the first instruction under the instruction condition by utilizing a linear interpolation methodReal-time climbing speed of conventional machine set; Similarly, the power instruction of the combined unit based on the allocation according to the adjustable capacity proportionAnd the current initial power of the combined unitInterpolation to obtain the firstReal-time climbing speed of combined unitTaking an absolute value of the climbing rate;
S3.2, judging whether each unit meets the current regulation capacity, and if so, meeting the following expression:
the unit meets the capacity requirement and the climbing rate requirement of the AGC control command under the original control strategy, no additional power distribution is needed, and the output power command is issued to each unit; if the conditions are not satisfied, each unit needs to carry out power distribution again, and the following steps are continuously executed;
S3.3, when the conventional hydroelectric generating set does not meet the climbing speed requirement, setting an optimal configuration target to track errors of AGC power instructions Minimum, the objective function is:
The constraint is dependent on Bench conventional hydroelectric generating set and firstThe constraint condition of the optimization problem is the expression described in S3.2 when the power adjustment range and the climbing range of the combined operation unit of the station water and the battery are allowed at the current moment; carrying out optimization solution on the problem by adopting a linear programming algorithm to obtain the optimized target power of each unit;
s3.4, issuing a secondary frequency modulation real-time control instruction to each unit, wherein each unit performs real-time power-frequency control on the unit level according to S3.1-S3.3, and the sum of output power of each unit jointly responds to a station level power instruction aiming at the whole hydropower station.
2. The method for distributing power among the multiple hydropower station units containing the hydropower cells according to claim 1, wherein the specific steps for obtaining the full-working-condition climbing rate distribution condition of the conventional hydropower station unit are as follows:
S1.1.1. obtaining any initial output level of a conventional hydroelectric generating set through model experiments or numerical simulation Next, power adjustment commands of different magnitudes are facedReal-time ramp rate at timeReal-time climbing rateThe unit is defined as the power change range per second of the unit under the current working condition；
S1.1.2. manufacturing a two-dimensional interpolation table of the climbing rate of a conventional hydroelectric generating set through experimental and simulation dataWherein the superscript i denotes the ith conventional hydroelectric power unit in the power plant.
3. The method for distributing power among a plurality of hydropower stations with water-containing electric cells according to claim 1, wherein the method is characterized by obtaining the full-working-condition climbing speed distribution condition of the hydropower-cell combined operation unit and comprises the following steps:
s1.2.1 the hydropower-battery combined operation unit operates in a secondary frequency modulation control mode, wherein in the process of responding to a power command, the actual output power of the hydropower unit With target instructionsThe existing difference value is rapidly compensated in real time by the auxiliary battery; establishing a dynamic simulation model of the hydropower-battery combined operation unit, and acquiring any initial output level of the combined operation unit in a numerical simulation modeNext, power adjustment commands of different magnitudes are facedReal-time ramp rate at time；
S1.2.2. manufacturing a two-dimensional interpolation table of climbing rate of water-electricity-battery combined operation unit through simulation dataWherein the superscript j denotes the j-th co-operating unit in the power plant.
4. The method for distributing power among multiple hydropower stations with water-containing batteries according to claim 1, wherein the calculating the real-time adjustable capacity of each unit according to the basic information and the real-time running state of each unit comprises the following steps:
s2.1, the basic information of each unit comprises the maximum output limit of each unit Minimum force limitAnd the current initial power; The power station is internally provided withThe conventional machine set and J-table combined machine set are combined whenBy usingThe representation is made of a combination of a first and a second color,Refer to the first place in the power plantA conventional unit; when (when)By usingThe representation is made of a combination of a first and a second color,When the power plant is in operation, the j-th combined unit in the power plant is referred to;
S2.2, setting the issuing time interval of the AGC control command Inputting a power control command of the hydropower station, ignoring the influence of AGC delay, and obtaining the plant-level AGC control command deviation of the hydropower station in the current calculation step length；
S2.3, calculating the adjustable capacity of each unit：
For the firstConventional hydroelectric generating set:
For the first Station water electricity-battery combined operation unit:
；
S2.4, carrying out power distribution among units according to the adjustable capacity proportion, and then calculating the power instruction of each unit in the step length as follows:
For the first Conventional hydroelectric generating set:
for the current calculation step length according to the adjustable capacity proportion A power instruction of a conventional hydroelectric generating set;
For the first Station water electricity-battery combined operation unit:
for the current calculation step length according to the adjustable capacity proportion And (5) a power instruction of the combined operation unit of the station water power and the battery.
5. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of power distribution between multiple hydropower station units comprising an electric-battery as claimed in any one of claims 1-4 when executing the program.
6. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements a method of inter-unit power distribution of a hydro-electric-cell multi-machine hydropower station as claimed in any one of claims 1-4.
7. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements a method for power distribution between units of a multi-machine hydropower station comprising hydro-electric cells according to any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410550888.XA CN118137586B (en) | 2024-05-07 | Method and equipment for distributing power among multi-machine hydropower station units containing hydropower cells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410550888.XA CN118137586B (en) | 2024-05-07 | Method and equipment for distributing power among multi-machine hydropower station units containing hydropower cells |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118137586A CN118137586A (en) | 2024-06-04 |
| CN118137586B true CN118137586B (en) | 2024-07-12 |
Family
ID=
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115333173A (en) * | 2022-10-12 | 2022-11-11 | 武汉大学 | Active power control method of multi-energy complementary system based on hydroelectric power and battery energy storage |
| CN116014797A (en) * | 2023-01-29 | 2023-04-25 | 国网河南省电力公司焦作供电公司 | Evaluation method for improving new energy acceptance capacity of distribution network |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115333173A (en) * | 2022-10-12 | 2022-11-11 | 武汉大学 | Active power control method of multi-energy complementary system based on hydroelectric power and battery energy storage |
| CN116014797A (en) * | 2023-01-29 | 2023-04-25 | 国网河南省电力公司焦作供电公司 | Evaluation method for improving new energy acceptance capacity of distribution network |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104467030B (en) | Power distribution method based on wind power and thermal power combined power generation | |
| CN103346577B (en) | Reduce wind energy turbine set AVC powerless control system and the method for wind power loss | |
| WO2021088442A1 (en) | Method and system for coordinately controlling reactive voltage of wind farm | |
| CN107171368B (en) | Wind power generation primary frequency modulation function implementation method based on wind power plant power control | |
| CN109088433B (en) | Photovoltaic power station optimization control method actively participating in power auxiliary service | |
| CN112838603B (en) | Wind-solar energy storage and pumping multi-source energy AGC coordinated complementary control method and device | |
| CN103545848A (en) | Coordinated control method for active power of photovoltaic power station group | |
| CN109412210B (en) | Fine adjustment method for active power of wind turbine generator | |
| CN111667136A (en) | Clearing method and device for regional power market and storage medium | |
| CN114759620A (en) | Reactive power cooperative optimization regulation and control method, device and system for wind and light storage station group | |
| CN111030101A (en) | Clean energy consumption linkage regulation and control method and system based on diversified big data | |
| CN104253443B (en) | A kind of active quickly regulating method of virtual small hydropower system | |
| CN106549421A (en) | A kind of water power and photoelectricity multi-objective optimization design of power and control method for coordinating | |
| CN110581551A (en) | Method and device for wind turbine generator to participate in emergency control of power grid | |
| CN114066329A (en) | Application scheduling method, device and medium based on energy storage network construction capability assessment | |
| CN118137586B (en) | Method and equipment for distributing power among multi-machine hydropower station units containing hydropower cells | |
| CN118137586A (en) | Method and equipment for distributing power among multi-machine hydropower station units containing hydropower cells | |
| CN116316884A (en) | Frequency modulation control method suitable for multi-source cooperation of high-proportion new energy power grid | |
| CN116093931A (en) | Edge-calculation-based source network load storage coordination control system | |
| CN114123248B (en) | Power grid frequency modulation operation control method and system using new energy primary frequency modulation priority | |
| CN107666156B (en) | Wind turbine generator active and reactive power coordinated control method and system | |
| CN204615408U (en) | A kind of Power Output for Wind Power Field control system | |
| CN114696370A (en) | Primary frequency modulation wind power cluster control system, method and device | |
| CN207518286U (en) | Energy-storage system cooperates with Steam Turbine governing stage full load operating system in power station | |
| CN105576712A (en) | Adaptive pole placement-based active power online control method for wind power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |