CN109038625B - Method for calculating capacity benefits of pumped storage power station of multi-type power supply system - Google Patents

Method for calculating capacity benefits of pumped storage power station of multi-type power supply system Download PDF

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CN109038625B
CN109038625B CN201810871715.2A CN201810871715A CN109038625B CN 109038625 B CN109038625 B CN 109038625B CN 201810871715 A CN201810871715 A CN 201810871715A CN 109038625 B CN109038625 B CN 109038625B
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power station
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pumped storage
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storage power
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CN109038625A (en
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傅旭
张雨津
孙沛
李富春
王昭
范丽霞
杨攀峰
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Northwest Electric Power Design Institute of China Power Engineering Consulting Group
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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
    • 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
    • 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
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract

The invention discloses a method for calculating the capacity benefit of a pumped storage power station of a multi-type power supply system. Firstly, new energy power generation 8760 hours hourly output data is read in. And secondly, establishing a mixed integer linear optimization model, performing production simulation on a multi-type power supply system of the non-pumped storage power station, and calculating the reliability index of the system. And then, adding the pumped storage power station and designating the operation mode of the pumped storage power station, and performing production operation simulation to obtain the thermal power installation machine required by the multi-type power supply system under the condition that the reliability index of the system is kept unchanged. And repeating the process, and calculating the thermal power installed capacity required by the system in various operation modes of the pumped storage power station. And finally, calculating the thermal power installation saved by the multi-type power supply system to serve as the capacity benefit of the pumped storage power station in a certain operation mode. The method can calculate the capacity of the pumped storage power station participating in the power balance of the multi-type power system, and is suitable for evaluation of capacity benefits of the pumped storage power station of the multi-type power system, scheduling mode arrangement and the like.

Description

Method for calculating capacity benefits of pumped storage power station of multi-type power supply system
Technical Field
The invention relates to the field of planning and operation scheduling of power systems, in particular to a method for calculating capacity benefits of pumped storage power stations in multi-type power systems.
Background
The pumped storage unit is developed rapidly as a device with mature technology and large capacity energy storage. The benefits of the pumped-storage power station in the power grid include static benefits and dynamic benefits: static benefits, namely benefits generated by peak load regulation are divided into capacity benefits and electric quantity benefits; the dynamic benefit is generated by meeting the operation requirement of the system when the pumped storage power station is started quickly and runs flexibly and undertakes the tasks of frequency modulation, phase modulation, load adjustment and emergency standby. With the large-scale grid connection of new energy power generation, an electric power system in the northwest area gradually becomes a multi-type power system comprising power supplies such as hydropower, thermal power, wind power, photovoltaic power, photo-thermal power and the like, and due to the influences of the hydropower, the photo-thermal power, the new energy power generation and an energy storage device, the capacity benefit evaluation of a pumped storage power station in the northwest area is more and more difficult. Compared with the conventional pumped storage power station which takes load peak elimination as a valley, the performance of the capacity benefit of the pumped storage power station in the northwest area is closely related to the operation mode of the pumped storage power station, so that the capacity benefit evaluation of the pumped storage power station is particularly difficult. How to determine the capacity benefit of the pumped storage power station, namely the capacity participating in the power balance of a multi-type power system, no clear method exists at present, which brings great challenges for planners to evaluate the installed adequacy level of the system and the dispatching operation mode of the pumped storage power station.
Disclosure of Invention
The invention aims to provide a method for calculating the capacity benefit of a pumped storage power station in a multi-type power system. The method can calculate the capacity of the pumped storage power station participating in the power balance of the multi-type power system, and is suitable for evaluation of capacity benefits of the pumped storage power station of the multi-type power system, scheduling mode arrangement and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for calculating the capacity benefit of a pumped storage power station of a multi-type power system comprises the following steps:
1) reading hourly output data of the multi-type new energy power generation within 8760 hours;
2) establishing a mixed integer linear optimization model, performing production operation simulation on a multi-type power supply system under the condition of no pumped storage power station, and calculating the reliability index of the system;
3) putting the pumped storage power station into the power station, designating the operation mode of the pumped storage power station, gradually reducing the scale of the conventional thermal power installation machine, and carrying out production operation simulation on the multi-type power system; under the condition that the reliability index of the system is kept unchanged, the installed capacity of the thermal power needed by the system after the system is added into the pumped storage power station is obtained;
4) repeating the steps 1) to 3) for each operation mode of the pumped storage power station, and calculating to obtain the thermal power installed capacity required by the system in each operation mode of the pumped storage power station;
5) and calculating the difference value of the conventional thermal power capacity required by the system under the condition of existence or nonexistence of the pumped storage power station and various operation modes of the pumped storage power station, and obtaining the capacity benefit of the pumped storage power station under various operation modes.
As a further improvement, in the step 1), the multi-type new energy power generation comprises wind power, photovoltaic and photothermal power stations, and the time-by-time wind and light resource sizes of the wind power, photovoltaic and photothermal power stations in the planning horizontal year of 8760 hours are expressed by theoretical output of no wind abandoning and light abandoning of the power stations, and are obtained by amplifying and summing the sample units in proportion. The method comprises the steps of collecting actual output data of sample units in an area without electricity abandonment, and fitting according to the proportion of planned wind power, photovoltaic and photo-thermal installed capacity and sample unit capacity to obtain wind power, photovoltaic and photo-thermal output characteristic data in the area.
As a further improvement of the present aspect, in step 2), when the production operation simulation is performed on the multi-type power supply system, the lowest system comprehensive cost is taken as an objective function, that is:
Figure BDA0001752325300000031
in the formula: citThe method comprises the steps of obtaining a power generation cost function of a thermal power generating unit i in a time period t; pi,tThe active power output of the thermal power generating unit i in the time period t is obtained; qit,upAnd Qit,offStarting and stopping expenses of the thermal power generating unit i in a time period t are respectively set; u shapeitAnd Ui,t-1The operation states of the thermal power generating unit i in time t and t-1 are respectively set; lambda [ alpha ]1、λ2、λ3、λ4Respectively comprising wind abandoning, light abandoning, water abandoning and penalty factors for efficiency reduction caused by peak regulation operation of the photo-thermal unit; lambda [ alpha ]5Punishment for load loss; lambda [ alpha ]6Punishment for lost reserve; wbtIs the output of the wind farm b in the time period t；
Figure BDA0001752325300000032
The predicted output force of the wind farm b in the time period t is obtained; sbtThe output of the photovoltaic power station b in the time period t;
Figure BDA0001752325300000033
the predicted output of the photovoltaic power station b in the time period t is obtained; eitThe method comprises the following steps of (1) discarding water of a hydroelectric generating set at a time period i t; lb,tAnd hb,tRespectively the load loss amount and the standby loss amount of the node b at the time t; hitThe efficiency of the photothermal unit i in the time period t is improved; mit,upAnd Mit,offThe starting cost and the stopping cost of the photothermal unit i in the time period t are respectively;
Figure BDA0001752325300000034
the running states of the photo-thermal unit i at the time t and the time t-1 respectively
Figure BDA0001752325300000035
Active power output of the photo-thermal unit i in a time period t; g is the set of all thermal power generating units; m is the set of all hydroelectric generating sets; n is the set of all photo-thermal units; t is the set of all time periods; b is the set of all nodes.
As a further improvement of the method, in the step 3), a pumped storage power station is put into use, the operation mode of the pumped storage power station is designated, production operation simulation is carried out, and under the condition that the reliability index of the system is not changed, the scale of the conventional thermal power installation machine is gradually reduced, so that the thermal power installation machine required by the system is obtained.
As a further improvement of this aspect, in step 4), a plurality of operation modes of the pumped-storage power station are considered, including 5 operation modes:
① comprehensive optimization operation based on prediction, namely, based on the predicted new energy output curve, arranging the working position of the pumped storage power station by adopting a mathematical optimization method;
② load curve-based peak clipping and valley filling operation, wherein water is pumped in the low valley of the load and power is generated in the high peak;
③ emergency standby operation, namely, stopping the pumped storage power station for standby all day;
④ electric power abandoning and water pumping + quick warehouse cleaning operation, wherein the strategy aims to accept new energy electric power abandon as much as possible, a pumped storage power station pumps water when the system abandons the electric power, and the pumped storage power station generates electricity to empty the upper warehouse capacity of the power station when the system does not abandon the electric power;
⑤ electricity abandoning and pumping water + reserving storage capacity to generate electricity, the pumped storage power station uses electricity abandoning and pumping water as the guide, when no electricity abandoning happens, only a part of storage capacity is emptied, the left storage capacity generates electricity at the load peak.
As a further improvement of the aspect, in the step 5), the capacity benefit of the pumped storage power station is obtained by subtracting the thermal power installed capacity required by the system after the pumped storage power station is put into the system from the thermal power installed capacity required by the system before the pumped storage power station is put into the system.
Compared with the prior art, the invention has the beneficial effects that:
the calculation method can quantitatively calculate the capacity benefit of the pumped storage power station. On one hand, the method can avoid a certain degree of investment waste caused by excessive thermal power installation of the system, difficult new energy power generation and consumption and excessively low thermal power utilization hours due to underestimation of the capacity benefit of the pumped storage power station; on the other hand, the situation that due to the fact that capacity benefits of the pumped storage power station are overestimated, system installation is insufficient, system power shortage is caused, and power supply reliability is low can be avoided. The method can calculate the capacity of the pumped storage power station participating in the power balance of the multi-type power system, and is suitable for evaluation of capacity benefits of the pumped storage power station of the multi-type power system, scheduling mode arrangement and the like.
Drawings
FIG. 1 is a schematic diagram of a calculation method according to an embodiment of the present invention;
FIG. 2 is a computational flow diagram of one embodiment of the present invention;
FIG. 3 is a graph of an example system annual load;
FIG. 4 is a graph of the daily load of an example system;
FIG. 5 is a graph of example system DC delivery;
FIG. 6 is a schematic diagram of an example system 1200MW pumped-hydro energy storage plant operating location;
FIG. 7 is a schematic diagram of an example system 2400MW pumped-hydro storage plant operating location;
FIG. 8 is a schematic diagram of an example system 3600MW pumped-hydro energy storage plant operating location.
Detailed Description
The invention discloses a method for calculating the capacity benefit of a pumped storage power station of a multi-type power system, which comprises the following steps:
firstly, new energy power generation such as wind power, photovoltaic and photo-thermal is read in for 8760-hour output data.
The multi-type new energy comprises: wind power, photovoltaic and photothermal power stations, wherein wind power, photovoltaic and photothermal are gradually time by time in a planning horizontal year of 8760 hours, the size of light resources is expressed by theoretical output of no wind abandon and light abandon of the power stations, the theoretical output is obtained by amplifying and summing sample units in proportion, namely, the actual output data of no electricity abandon of the sample units in an area is acquired, and then the output characteristic data of the wind power, photovoltaic and photothermal in the area is obtained by fitting according to the proportion of the planned wind power, photovoltaic and photothermal installed capacity and the capacity of the sample units.
And secondly, establishing a mixed integer linear optimization model, performing production operation simulation on a multi-type power supply system of the non-pumped storage power station, and calculating system reliability indexes such as an electric power shortage expectation (EENS) index.
When the production operation simulation is carried out on the multi-type power supply system, the lowest comprehensive cost of the system is taken as a target function, namely:
Figure BDA0001752325300000051
in the formula: citThe method comprises the steps of obtaining a power generation cost function of a thermal power generating unit i in a time period t; pi,tThe active power output of the thermal power generating unit i in the time period t is obtained; qit,upAnd Qit,offStarting and stopping expenses of the thermal power generating unit i in a time period t are respectively set; u shapeitAnd Ui,t-1The operation states of the thermal power generating unit i in time t and t-1 are respectively set; lambda [ alpha ]1、λ2、λ3、λ4Respectively abandoning wind, light and water and punishment reasons of efficiency reduction caused by peak regulation operation of the photo-thermal unitA seed; lambda [ alpha ]5Punishment for load loss; lambda [ alpha ]6Punishment for lost reserve; wbtThe output of the wind farm b in the time period t;the predicted output force of the wind farm b in the time period t is obtained; sbtThe output of the photovoltaic power station b in the time period t;
Figure BDA0001752325300000062
the predicted output of the photovoltaic power station b in the time period t is obtained; eitThe method comprises the following steps of (1) discarding water of a hydroelectric generating set at a time period i t; lb,tAnd hb,tRespectively the load loss amount and the standby loss amount of the node b at the time t; hitThe efficiency of the photothermal unit i in the time period t is improved; mit,upAnd Mit,offThe starting cost and the stopping cost of the photothermal unit i in the time period t are respectively;
Figure BDA0001752325300000063
the running states of the photo-thermal unit i at the time t and the time t-1 respectivelyActive power output of the photo-thermal unit i in a time period t; g is the set of all thermal power generating units; m is the set of all hydroelectric generating sets; n is the set of all photo-thermal units; t is the set of all time periods; b is the set of all nodes.
And then, putting the system into a pumped storage power station, designating the operation mode of the pumped storage power station, gradually reducing the scale of the conventional thermal power installation machine, repeatedly carrying out production operation simulation, and solving the thermal power installation machine required by the system under the condition that the reliability index of the system is kept unchanged. The above calculations are repeated for each pumped storage power station operating mode.
And putting the system into a pumped storage power station, designating the operation mode of the pumped storage power station, simulating production operation, and gradually reducing the scale of the conventional thermal power installation machine under the condition that the reliability index of the system is not changed to obtain the thermal power installation machine required by the system.
Consider the operation of a variety of pumped-storage power stations, including:
① comprehensive optimization operation based on prediction, namely, based on the predicted new energy output curve, arranging the working position of the pumped storage power station by adopting a mathematical optimization method;
② load curve-based peak clipping and valley filling operation, wherein water is pumped in the low valley of the load and power is generated in the high peak;
③ emergency standby operation, namely, stopping the pumped storage power station for standby all day;
④ electric power abandoning and water pumping + quick warehouse cleaning operation, wherein the strategy aims to accept new energy electric power abandon as much as possible, a pumped storage power station pumps water when the system abandons the electric power, and the pumped storage power station generates electricity to empty the upper warehouse capacity of the power station when the system does not abandon the electric power;
⑤ electricity abandoning and pumping water + reserving storage capacity to generate electricity, the pumped storage power station uses electricity abandoning and pumping water as the guide, when no electricity abandoning happens, only a part of storage capacity is emptied, the left storage capacity generates electricity at the load peak.
And finally, taking the obtained difference value of the conventional thermal power capacity required by the system under the condition of existence of the pumped storage power station as the capacity benefit of the pumped storage power station in a certain operation mode.
The capacity benefit of the pumped storage power station is that the thermal power installed capacity required by the system before the pumped storage power station is put into operation is subtracted by the thermal power installed capacity required by the system after the pumped storage power station is put into operation.
The method can calculate the capacity of the pumped storage power station participating in the power balance of the multi-type power system, and is suitable for evaluation of capacity benefits of the pumped storage power station of the multi-type power system, scheduling mode arrangement and the like.
The following describes an example of calculating the capacity benefit of a pumped storage power station of a power grid in a certain area in detail with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
The method comprises the following specific steps:
1) and reading out 8760-hour output data of new energy power generation such as regional power grid wind power, photovoltaic and photo-thermal.
2) Reading information such as regional power supply planning, load prediction and the like, as shown in a table 1; information such as a regional power grid daily load characteristic curve, an annual load characteristic curve, a direct current transmission curve and the like is read, and the information is shown in fig. 3 to 5. And (3) performing production simulation of a planned horizontal year non-pumped storage power station for 8760 hours, and calculating the reliability indexes of the thermal power installation machine and the system required by the system, as shown in the 2 nd column in the table 2. The thermal power plant required by the system is 7820MW, and the expected insufficient power (EENS) index is 3.061 hundred million kWh.
TABLE 1 Qinghai province 2025 years power supply installation and load prediction
Figure BDA0001752325300000071
Volume benefit analysis of table 212000 MW pumped storage power station
Figure BDA0001752325300000072
Figure BDA0001752325300000081
3) After the 1200MW pumped storage power station is added, the system reliability index and the required thermal power unit are calculated, and the calculation result is shown in the 3 rd to 7 th columns in the table 2.
Consider 5 pumped storage power station modes of operation:
① comprehensive optimization operation, based on the predicted new energy output curve, the mathematical optimization method is adopted to arrange the working position of the pumped storage power station.
② peak clipping and valley filling operation, based on the load curve, pumping water in the valley time and generating power in the peak time, has the advantages of simple dispatching of the pumped storage power station, but can not fully play the role of the pumped storage power station because of the fixed operation mode.
③ accident standby operation, namely, the pumped storage power station is shut down for standby all day long, has the advantages of avoiding pumping/power generation conversion loss and having the defect that the function of the pumped storage power station cannot be fully exerted.
④ abandon electricity to pump water and quickly clear the reservoir, aiming at accepting new energy and abandon electricity as much as possible, the pumped storage power station pumps water when the system abandons electricity, and when the system abandons electricity, the pumped storage power station generates electricity to vacate the upper reservoir capacity of the power station to prepare for the next round of pumping water.
⑤ operation of electricity abandoning and water pumping and reserved storage capacity peak power generation, similar to the way of rapid cleaning, the pumped storage power station takes electricity abandoning and water pumping as the guide, but when no electricity abandoning occurs, the station does not immediately and completely empty the storage capacity, but only empties a part of the storage capacity, namely, a part of water is put, and the reserved storage capacity generates power at the load peak, thereby playing part of peak regulation functions.
4) And calculating the capacity benefit of the pumped storage power station under various operation modes, as shown in table 2.
5) And repeating the steps, calculating the capacity benefits of 2400MW and 3600MW pumped storage power stations constructed by regional power grids, and calculating results are shown in tables 3-4.
6) Analysis of calculation results
Construction of 1200MW spot storage: comprehensively optimizing the operation, wherein the capacity benefit of the pumped storage power station is 200MW, and the replacement rate of the thermal power installation is 16.67%; peak clipping and valley filling, wherein the capacity benefit is 100MW, and the replacement rate of the thermal power installation is 8.33%; the capacity benefit in the other 3 modes of operation is 0.
Construction of 2400MW pumped storage: comprehensively optimizing the operation, wherein the capacity benefit of the pumped storage power station is 350MW, and the replacement rate of the thermal power installation is 14.58%; the peak clipping and valley filling operation is carried out, the capacity benefit is 150MW, and the replacement rate of the thermal power installation is 6.25%; the capacity benefit in the other 3 modes of operation is 0.
Construction of 3600MW pumped storage: comprehensively optimizing the operation, wherein the capacity benefit of the pumped storage power station is 450MW, and the replacement rate of the thermal power installation is 12.5%; the peak clipping and valley filling operation is carried out, the capacity benefit is 200MW, and the replacement rate of the thermal power installation is 5.56%; the capacity benefit in the other 3 modes of operation is 0.
By combining the analysis, the capacity benefit of constructing the pumped storage power station in a certain area is lower, the capacity benefit is about 6-15% of the installed capacity, and the specific numerical value is closely related to the operation mode of the pumped storage power station.
Daily operation modes of the regional power grid pumped storage power station are shown in figures 6-8.
Meter 32400 MW pumped storage power station capacity benefit analysis
Figure BDA0001752325300000091
Capacity benefit analysis of table 43600 MW pumped storage power station
Figure BDA0001752325300000101
The method is convenient for determining the capacity of the pumped storage power station participating in power balance, and is beneficial to the planning personnel to evaluate the power supply installation scheme and reasonably schedule and arrange the operation mode of the pumped storage power station by the scheduling personnel.
The above is a further detailed description of the present invention, and it is not considered that the specific embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that a number of simple deductions or substitutions can be made without departing from the spirit of the present invention, for example, a production simulation program considering random fault factors of a unit is further adopted, and the protection scope of the present invention is determined by the appended claims.

Claims (4)

1. A method for calculating the capacity benefit of a pumped storage power station of a multi-type power system is characterized by comprising the following steps:
1) reading hourly output data of the multi-type new energy power generation within 8760 hours;
2) establishing a mixed integer linear optimization model, performing production operation simulation on a multi-type power supply system under the condition of no pumped storage power station, and calculating the reliability index of the system;
3) putting the pumped storage power station into operation, designating the operation mode of the pumped storage power station, gradually reducing the scale of the conventional thermal power installation, simulating the production and operation of various power systems, and obtaining the thermal power installation capacity required by the system after the pumped storage power station is added under the condition that the reliability index of the system is not changed;
4) repeating the steps 1) to 3) for each operation mode of the pumped storage power station, and calculating to obtain the thermal power installed capacity required by the system in each operation mode of the pumped storage power station;
5) calculating the difference value of the conventional thermal power capacity required by the system of the pumped storage power station under each operation mode and whether the pumped storage power station exists or not, and obtaining the capacity benefit of the pumped storage power station under each operation mode;
in step 2), when the production operation simulation is performed on the multi-type power supply system, the lowest comprehensive cost of the system is taken as a target function, namely:
Figure FDA0002309670210000011
in the formula: citThe method comprises the steps of obtaining a power generation cost function of a thermal power generating unit i in a time period t; pi,tThe active power output of the thermal power generating unit i in the time period t is obtained; qit,upAnd Qit,offStarting and stopping expenses of the thermal power generating unit i in a time period t are respectively set; u shapeitAnd Ui,t-1The operation states of the thermal power generating unit i in time t and t-1 are respectively set; lambda [ alpha ]1、λ2、λ3、λ4Respectively comprising wind abandoning, light abandoning, water abandoning and punishment factors of efficiency reduction caused by peak regulation operation of the photo-thermal unit; lambda [ alpha ]5Punishment for load loss; lambda [ alpha ]6Punishment for lost reserve; wbtThe output of the wind farm b in the time period t;
Figure FDA0002309670210000021
the predicted output force of the wind farm b in the time period t is obtained; sbtThe output of the photovoltaic power station b in the time period t;the predicted output of the photovoltaic power station b in the time period t is obtained; eitThe method comprises the following steps of (1) discarding water of a hydroelectric generating set at a time period i t; lb,tAnd hb,tRespectively the load loss amount and the standby loss amount of the node b at the time t; hitThe efficiency of the photothermal unit i in the time period t is improved; mit,upAnd Mit,offThe starting cost and the stopping cost of the photothermal unit i in the time period t are respectively;
Figure FDA0002309670210000023
the operation states of the photo-thermal unit i at the time t and the time t-1 are respectively;
Figure FDA0002309670210000024
active power output of the photo-thermal unit i in a time period t; g is the set of all thermal power generating units; m is the set of all hydroelectric generating sets; n is the set of all photo-thermal units; t is the set of all time periods; b is the set of all nodes.
2. The method for calculating the capacity efficiency of the pumped-storage power station of the multi-type power system according to claim 1, wherein in the step 1), the multi-type new energy comprises: wind power, photovoltaic and photothermal power stations, wherein wind power, photovoltaic and photothermal are gradually time by time in a planning horizontal year of 8760 hours, the size of light resources is expressed by theoretical output of no wind abandon and light abandon of the power stations, the theoretical output is obtained by amplifying and summing sample units in proportion, namely, the actual output data of no electricity abandon of the sample units in an area is acquired, and then the output characteristic data of the wind power, photovoltaic and photothermal in the area is obtained by fitting according to the proportion of the planned wind power, photovoltaic and photothermal installed capacity and the capacity of the sample units.
3. The method of claim 1, wherein the step 4) of considering the operation modes of the pumped-storage power station comprises:
① comprehensive optimization operation based on prediction, namely, based on the predicted new energy output curve, arranging the working position of the pumped storage power station by adopting a mathematical optimization method;
② load curve-based peak clipping and valley filling operation, wherein water is pumped in the low valley of the load and power is generated in the high peak;
③ emergency standby operation, namely, stopping the pumped storage power station for standby all day;
④ electric power abandoning and water pumping + quick warehouse cleaning operation, wherein the strategy aims to accept new energy electric power abandon as much as possible, a pumped storage power station pumps water when the system abandons the electric power, and the pumped storage power station generates electricity to empty the upper warehouse capacity of the power station when the system does not abandon the electric power;
⑤ electricity abandoning and pumping water + reserving storage capacity to generate electricity, the pumped storage power station uses electricity abandoning and pumping water as the guide, when no electricity abandoning happens, only a part of storage capacity is emptied, the left storage capacity generates electricity at the load peak.
4. The method for calculating the capacity benefit of the pumped storage power station of the multi-type power system according to claim 1, wherein in the step 5), the capacity benefit of the pumped storage power station is the thermal power installed capacity required by the system before the pumped storage power station is put into operation minus the thermal power installed capacity required by the system after the pumped storage power station is put into operation.
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CN111598295B (en) * 2020-04-13 2022-10-28 中国电建集团贵阳勘测设计研究院有限公司 Power system pumped storage power station installation optimization method for promoting wind power consumption
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CN113708416B (en) * 2021-08-19 2023-11-28 华电电力科学研究院有限公司 Intelligent power scheduling method for wind, light and fire pumping and storage
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