CN114865662B - Thermoelectric unit power output control method and system for frequency modulation market - Google Patents
Thermoelectric unit power output control method and system for frequency modulation market 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
- H02J3/24—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
- H02J3/28—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
- H02J3/38—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
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Abstract
The invention discloses a thermoelectric unit power output control method and system for a frequency modulation market, belonging to the technical field of power control.A heat storage device is introduced to adjust the thermal output of a thermoelectric unit and provide a thermal output adjustment quantity for the thermoelectric unit so as to change the corresponding frequency modulation capacity of the thermoelectric unit in the frequency modulation market and establish a frequency modulation market optimization model; the process of solving the model is equal to searching towards the direction of increasing the corresponding frequency modulation capacity of the thermoelectric unit in the frequency modulation market in the feasible domain range of the operation of the thermoelectric unit so as to find the optimal thermal output adjustment quantity, thereby obtaining the optimal operation point of the thermoelectric unit in the frequency modulation market and obtaining the optimal power output of the thermoelectric unit. After the thermal demand is determined, the adjustable space is provided for the thermal output of the thermoelectric unit, the adjustable range of the power output is larger, the flexibility is higher, and the power fluctuation of the source side and the load side of the power system can be better adapted.
Description
Technical Field
The invention belongs to the technical field of power control, and particularly relates to a thermoelectric unit power output control method and system for the frequency modulation market.
Background
With the market transformation of the power industry, the power grid operator gradually no longer directly has the control right of most power frequency adjusting devices, but needs to acquire the control right in a marketable manner, namely, the frequency modulation market. The thermoelectric unit is used as a unit capable of supplying heat and power simultaneously, occupies an important position in the fields of electric power and heat power industries in China, and can participate in the competition of a frequency modulation market together with other units under the background of electric power marketization. With the participation of a large amount of renewable energy sources such as wind power, photovoltaic and the like in the power system, the influence of the volatility on the frequency of the power grid is more and more obvious, and the demand of the power system on the frequency modulation capacity is also obviously increased; in order to keep the frequency of the grid stable, it is necessary to extend the adjustable range of the power output level of the unit to accommodate power fluctuations on the source side and the load side of the power system. Therefore, the method for controlling the power output of the thermoelectric unit oriented to the frequency modulation market is of great significance.
However, in the existing method for controlling the power output of the thermoelectric power unit facing the frequency modulation market, as a main supplier of heat, the thermoelectric power unit primarily aims to meet the heat demand, and secondly adjusts the power output level to adapt to the power fluctuation on the source side and the load side of the power system.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides a thermoelectric generator set power output control method and system oriented to the frequency modulation market, which are used for solving the technical problem that the adjustable range of the power output of a thermoelectric generator set is smaller in the prior art.
In order to achieve the above object, in a first aspect, the present invention provides a thermoelectric power generation unit power output control method for frequency modulation market, including:
inputting the maximum thermal output power and the maximum thermal storage power of the heat storage device and the thermal output of the thermoelectric unit at the current moment into a frequency modulation market optimization model for solving to obtain the optimal power output of the thermoelectric unit at the current moment;
the construction method of the frequency modulation market optimization model comprises the following steps:
s1, in a feasible region range of operation of the thermoelectric unit, based on the thermal output and thermal storage characteristics of the heat storage device, adjusting the thermal output of the thermoelectric unit to obtain the electric power output of the corresponding thermoelectric unit, and further obtaining the upper frequency modulation capacity and the lower frequency modulation capacity of the thermoelectric unit in the frequency modulation market;
s2, constructing a target function based on the power output of the thermoelectric unit and the upper frequency modulation capacity and the lower frequency modulation capacity corresponding to the thermoelectric unit in the frequency modulation market, so as to establish a frequency modulation market optimization model;
the objective function is:
wherein T is a time domain;is composed oftOutputting the electric power of the thermoelectric generator set at any moment;is composed oftThe unit electric energy yield of the thermoelectric unit is obtained at any time;is composed oftThe corresponding upper frequency modulation capacity of the lower thermoelectric unit in the frequency modulation market at any moment;is composed oftThe lower frequency modulation capacity of the thermoelectric unit in the frequency modulation market at any moment;is composed oftThe unit frequency modulation capacity gain of the thermoelectric unit is realized at the moment;is a frequency modulation mileage ratio;is composed oftThe unit frequency modulation mileage income of the thermoelectric unit is obtained at the moment;is composed oftOutputting the heat of the thermoelectric unit at any time;the unit heat output cost of the thermoelectric unit is obtained;the unit power output cost of the thermoelectric power unit.
Further preferably, the feasible region for the operation of the thermoelectric power unit comprises: upper boundary A 1 B 1 Lower boundary A 2 B 2 Left boundary A 1 A 2 And a right boundary B 1 B 2 ;
Wherein, the upper boundary A 1 B 1 Representing an upper limit of the power output of the thermoelectric power unit; lower boundary A 2 B 2 Represents a lower limit of the power output of the thermoelectric power unit; left boundary A 1 A 2 Represents the lower limit of the thermal output of the thermoelectric unit; right border B 1 B 2 Representing the upper limit of the thermal output of the thermoelectric unit.
Further preferably, the upper boundary A 1 B 1 To the power output ofThe relationship to the thermal output Q is:
wherein,is an upper boundary A 1 B 1 The slope of (a);is an upper boundary A 1 B 1 The intercept of (d);is a lower boundary A 2 B 2 The slope of (a);is a lower boundary A 2 B 2 The intercept of (c).
Further preferably, the thermoelectric power generation unit has a corresponding upper frequency modulation capacity in the frequency modulation marketAnd the lower frequency-modulation capacity is:
wherein,is composed oftThe thermal output adjustment amount corresponding to the frequency modulation on the thermoelectric unit at any moment;is composed oftOutputting the adjustment quantity of the heat power corresponding to the time of frequency modulation under the thermoelectric unit at the moment;the maximum thermal output power of the heat storage device;storing power for a maximum thermal power of the heat storage device;andleft boundary A between feasible regions of thermoelectric unit operation 1 A 2 And a right boundary B 1 B 2 In the meantime.
It is further preferred whenAndwhen the number of the positive lines is negative,andsatisfies the following conditions:,。
when in useIs positive number, andwhen the number is negative, the number of the negative,andsatisfies the following conditions:,。
further preferably, whenIs negative, andwhen the number is positive, the number of the first and second groups is positive,andsatisfies the following conditions:,。
further preferably, whenAndwhen the number of the positive lines is positive,andsatisfies the following conditions:,。
in a second aspect, the present invention provides a thermoelectric power generation unit power output control system for frequency modulation market, including:
the model building module is used for adjusting the thermal output of the thermoelectric unit based on the thermal output and thermal storage characteristics of the heat storage device in the feasible operating domain range of the thermoelectric unit to obtain the electric power output of the corresponding thermoelectric unit, and further obtain the upper frequency modulation capacity and the lower frequency modulation capacity of the thermoelectric unit in the frequency modulation market; constructing a target function based on the power output of the thermoelectric unit and the upper frequency modulation capacity and the lower frequency modulation capacity corresponding to the thermoelectric unit in the frequency modulation market, so as to establish a frequency modulation market optimization model;
the power output control module is used for inputting the maximum thermal output power and the thermal storage power of the heat storage device and the thermal output of the thermoelectric unit at the current moment into the frequency modulation market optimization model for solving to obtain the optimal power output of the thermoelectric unit at the current moment;
the objective function is:
wherein T is a time domain;is composed oftOutputting the electric power of the thermoelectric generator set at any moment;is composed oftThe unit electric energy yield of the thermoelectric unit is obtained at any time;is composed oftThe corresponding upper frequency modulation capacity of the lower thermoelectric unit in the frequency modulation market at any moment;is composed oftThe lower frequency modulation capacity of the thermoelectric unit in the frequency modulation market at any moment;is composed oftThe unit capacity gain of the thermoelectric unit is realized at any time;is a frequency modulation mileage ratio;is composed oftThe unit frequency modulation mileage income of the thermoelectric unit is obtained at the moment;is composed oftOutputting the heat of the thermoelectric unit at any moment;the unit heat output cost of the thermoelectric unit is obtained;the unit power output cost of the thermoelectric power unit.
In a third aspect, the present invention provides a thermoelectric power generation unit power output control system for frequency modulation market, including: the thermoelectric generating set power output control method for the frequency modulation market is implemented by the aid of the thermoelectric generating set power output control method provided by the first aspect of the invention when the computer program is executed by the processor.
In a fourth aspect, the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, where the computer program, when executed by a processor, controls a device in which the storage medium is located to execute the method for controlling power output of a thermoelectric generation unit facing a frequency modulation market, provided by the first aspect of the present invention.
Generally, by the above technical solution conceived by the present invention, the following beneficial effects can be obtained:
1. the invention provides a thermoelectric unit power output control method facing a frequency modulation market, which adjusts the thermal output of a thermoelectric unit by introducing a heat storage device, provides a thermal output adjustment amount for the thermoelectric unit, and changes the corresponding frequency modulation capacity of the thermoelectric unit in the frequency modulation market so as to establish a frequency modulation market optimization model; the process of solving the frequency modulation market optimization model is equal to searching towards the direction that the upper frequency modulation capacity and the lower frequency modulation capacity of the thermoelectric unit in the frequency modulation market are increased in the feasible domain range of the operation of the thermoelectric unit so as to find the optimal thermal output adjustment amount, and therefore the optimal operation point of the thermoelectric unit in the frequency modulation market is obtained, and the optimal power output of the thermoelectric unit is obtained. After the thermal demand is determined, the method provides an adjustable space for the thermal output of the thermoelectric unit, the adjustable range of the power output is large, the flexibility is high, and the method can be well adapted to the power fluctuation of the source side and the load side of the power system.
2. According to the thermoelectric unit power output control method for the frequency modulation market, the frequency modulation capacity can be adjusted by the thermal output adjustment amount provided by the energy storage device, so that the size of the frequency modulation capacity of the thermoelectric unit participating in the frequency modulation market can be flexibly adjusted, the frequency modulation capacity gain and the frequency modulation mileage gain which can be obtained by the thermoelectric unit participating in the frequency modulation market are improved, and further the total gain of the thermoelectric unit is improved.
Drawings
Fig. 1 is a schematic view of a feasible region of a thermoelectric power generation unit provided in embodiment 1 of the present invention.
FIG. 2 is a diagram provided in example 1 of the present inventionAndthe feasible domain of the thermoelectric generator set and the frequency modulation capacity of the thermoelectric generator set are both negative numbers.
FIG. 3 is a diagram provided in example 1 of the present inventionIs positive number, andthe schematic diagram of the feasible domain of the thermoelectric generator set and the frequency modulation capacity of the thermoelectric generator set is negative.
FIG. 4 is a diagram provided in example 1 of the present inventionIs negative, andthe schematic diagram of the feasible domain of the thermoelectric generator set and the frequency modulation capacity of the thermoelectric generator set in positive number.
FIG. 5 is a block diagram provided in example 1 of the present inventionAndthe feasible domains of the thermoelectric generator set and the frequency modulation capacity of the thermoelectric generator set are all positive numbers.
Fig. 6 is a comparison graph of frequency modulation capacity of the thermoelectric power unit in the frequency modulation market under the scenario one and the scenario two provided in embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
A thermoelectric unit power output control method for a frequency modulation market comprises the following steps:
to maximize the thermal output of the heat storage deviceAnd maximum thermal storage powerAnd the thermal output of the thermoelectric unit at the current moment is input into a frequency modulation market optimization model for solving to obtain the optimal power output of the thermoelectric unit at the current moment;
specifically, the method for constructing the frequency modulation market optimization model comprises the following steps:
s1, in a feasible region range of operation of the thermoelectric unit, based on the thermal output and thermal storage characteristics of the heat storage device, adjusting the thermal output of the thermoelectric unit to obtain the electric power output of the corresponding thermoelectric unit, and further obtaining the upper frequency modulation capacity and the lower frequency modulation capacity of the thermoelectric unit in the frequency modulation market;
in particular, the thermoelectric power generation unit can simultaneously generate electric energy and thermal energy, and the feasible area of the thermoelectric power generation unit is generally quadrangular, as shown in fig. 1. A. the 1 B 1 And A 2 B 2 Respectively, the upper and lower boundaries of the feasible region, and A 1 A 2 And B 1 B 2 Left and right boundaries of the feasible region respectively; wherein, the upper boundary A 1 B 1 Representing an upper limit of the power output of the thermoelectric power unit; lower boundary A 2 B 2 Represents a lower limit of the power output of the thermoelectric power unit; left boundary A 1 A 2 Represents the lower limit of the thermal output of the thermoelectric unit; right border B 1 B 2 Representing the upper limit of the thermal output of the thermoelectric unit. Specifically, the upper boundary A 1 B 1 To the power output ofThe relationship to the thermal output Q is:
wherein,is an upper boundary A 1 B 1 The slope of (a); is an upper boundary A 1 B 1 The intercept of (d);is a lower boundary A 2 B 2 The slope of (a);is a lower boundary A 2 B 2 The intercept of (2).
As shown in FIG. 1, intAt any moment, the operating point of the electric heating unit isWherein, in the process,is composed oftOutputting the electric power of the thermoelectric generator set at any moment;is composed oftAnd outputting the heat of the thermoelectric unit at the moment. It should be noted that, since the thermal output curve of the thermoelectric power unit is generally determined by the thermal load prediction curve, the thermal output value thereof at any time is determinedIs determined that the up-modulation capacity when participating in the frequency modulation market is onlyThe lower frequency-modulation capacity is onlyAnd at this time, the up and down frequency regulation capacities are both fixed values. The heat storage device is a flexible device and can store and supply heat according to the requirement, so that when the thermoelectric unit and the heat storage device are operated cooperatively, the thermal output of the thermoelectric unit is determined by a determined valueThe method is expanded to a thermal output interval based on the thermal output and thermal storage characteristics of the heat storage device, and the optimal operation point of the electric heating unit in the frequency modulation market can be searched in the thermal output interval. Specifically, under the scene of cooperative operation of the thermoelectric unit and the heat storage device, the corresponding upper frequency modulation capacity of the thermoelectric unit in the frequency modulation marketAnd lower frequency-modulation capacityComprises the following steps:
wherein,is composed oftThe thermal output adjustment amount corresponding to the frequency modulation on the thermoelectric unit at any moment;is composed oftOutputting the adjustment quantity of the heat power corresponding to the time of frequency modulation under the thermoelectric unit at the moment;the maximum thermal output power of the heat storage device;storing power for a maximum thermal power of the heat storage device;andleft boundary A between feasible regions 1 A 2 And a right boundary B 1 B 2 In the meantime.
Further, under the scene of the cooperative operation of the thermoelectric unit and the heat storage device:
when in useAndthe schematic diagram of the feasible domain of the thermoelectric generator set and the frequency modulation capacity thereof when both are negative numbers is shown in fig. 2, and at this time,andsatisfy the requirements of,(ii) a The thermal output of the thermoelectric power unit is determined by a determined valueIs extended to。
When in useIs positive number, andthe schematic diagram of the feasible domain of the thermoelectric generator set and the frequency modulation capacity thereof in the case of negative number is shown in fig. 3, and at this time,andsatisfies the following conditions:,(ii) a The thermal output of the thermoelectric power unit is determined by a determined valueExtend to。
When in useIs negative, andthe schematic diagram of the feasible domain of the thermoelectric generator set and the frequency modulation capacity thereof in positive number is shown in FIG. 4, and at this timeAndsatisfies the following conditions:,(ii) a The thermal output of the thermoelectric power unit is determined by a determined valueIs extended to。
When in useAndthe schematic diagram of the feasible domain of the thermoelectric generator set and the frequency modulation capacity thereof when the domains are positive numbers is shown in fig. 5, at this time,andsatisfies the following conditions:,(ii) a Thermoelectric generator setIs determined by the determined valueIs extended to。
The corresponding upper frequency modulation capacity and lower frequency modulation capacity of the recording thermoelectric unit in the frequency modulation market are respectivelyAndas can be seen in conjunction with figures 2-5,is greater than,Is greater thanThe up and down frequency modulation capacity is improved; and the frequency modulation capacity can be adjusted by the thermal output adjustment amount provided based on the energy storage device, which is beneficial to flexibly adjusting the frequency modulation capacity of the thermoelectric unit participating in the frequency modulation market.
S2, constructing a target function based on the power output of the thermoelectric unit and the upper frequency modulation capacity and the lower frequency modulation capacity corresponding to the thermoelectric unit in the frequency modulation market, so as to establish a frequency modulation market optimization model;
the objective function is:
wherein T is a time domain;is composed oftOutputting the electric power of the thermoelectric generator set at any moment;is composed oftThe unit electric energy yield of the thermoelectric unit is obtained at any time;is composed oftThe corresponding upper frequency modulation capacity of the lower thermoelectric unit in the frequency modulation market at any moment;is composed oftThe lower frequency modulation capacity of the thermoelectric unit in the frequency modulation market at any moment;is composed oftThe unit frequency modulation capacity gain of the thermoelectric unit is realized at the moment;is a frequency modulation mileage ratio;is composed oftThe unit frequency modulation mileage income of the thermoelectric unit is obtained at the moment;is composed oftOutputting the heat of the thermoelectric unit at any time;the unit heat output cost of the thermoelectric unit is obtained;the unit power output cost of the thermoelectric power unit. It should be noted that T here may be 24 hours, or may be a month or a year, and is determined according to actual requirements.
It should be noted that, in this embodiment, the objective function of the frequency modulation market optimization model corresponds to maximizing the total profit of the thermoelectric power unit, specifically: the method and the device have the advantages that the profit of the thermoelectric unit in the electric energy market, the frequency modulation capacity profit of the thermoelectric unit participating in the frequency modulation market, and the difference between the sum of the frequency modulation mileage profit of the thermoelectric unit participating in the frequency modulation market and the thermal power output cost of the thermoelectric unit are maximized.
When the model is solved, the corresponding upper frequency modulation capacity of the thermoelectric unit in the frequency modulation market is usedAnd a lower frequency-modulation capacityIs brought into the above-mentioned objective function andandand solving the constraint condition, and finding out the optimal operating point of the thermoelectric unit by finding out the optimal thermal output adjustment quantity so as to obtain the optimal power output of the thermoelectric unit.
In order to further explain the beneficial effects of the thermoelectric unit power output control method for the frequency modulation market, detailed descriptions are given below by combining specific implementation cases:
a typical market clearing price curve of American PJM is selected and comprises an energy price curve, a frequency modulation capacity price curve and a frequency modulation mileage price curve, in a large system, the capacities of a single thermoelectric unit and a single heat storage device are negligible, and a marginal clearing price can be adopted as a settlement price when the thermoelectric unit and the heat storage device participate in the energy market and the frequency modulation market.
In the present embodiment, two simulation scenarios are set. In the first scenario, the thermoelectric unit is used as an independent individual to participate in the frequency modulation market, and the heat storage device is not considered when the power output control of the thermoelectric unit facing the frequency modulation market is carried out; in the second scenario, when the thermoelectric unit power output control facing the frequency modulation market is carried out, the thermoelectric unit and the heat storage device run cooperatively to jointly participate in the frequency modulation market. The remaining constraints are the same in both scenario one and scenario two.
The corresponding frequency modulation capacity of the thermoelectric generator set under the situation one and the situation two in the frequency modulation market is obtained through simulation analysis, and is shown in fig. 6; the frequency modulation capacity refers to the sum of the upper frequency modulation capacity and the lower frequency modulation capacity corresponding to the thermoelectric unit in the frequency modulation market. As can be seen from fig. 6, except that the two scenarios in the 5 th time period do not participate in the frequency modulation market, when the thermoelectric generator set power output control facing the frequency modulation market is performed in the other time periods, the frequency modulation capacities corresponding to the thermoelectric generator sets in the frequency modulation market in the second scenario are all greater than those in the first scenario. In the second scenario, the frequency modulation capacity corresponding to the heat motor set in the frequency modulation market is at most 61.46MW and at least 8.90MW, while in the first scenario, the frequency modulation capacity corresponding to the heat motor set in the frequency modulation market is at most 52.58MW and at least 0.01 MW; in all simulation time periods, the total amount of frequency modulation capacity corresponding to the thermoelectric generator set in the frequency modulation market in the scenario two is 257.15MW, and the total amount of frequency modulation capacity corresponding to the thermoelectric generator set in the frequency modulation market in the scenario one is 52.79MW, which is 20.5% of the scenario two. Therefore, the thermoelectric unit power output control method for the frequency modulation market can enable the thermoelectric unit to participate in the frequency modulation market, so that the frequency modulation capacity is high, and the power output adjustable range of the thermoelectric unit is large.
Further, table 1 shows the revenue components of the thermoelectric generator set and the heat storage device in all simulation periods in scenario one and scenario two, including cost, energy market revenue, frequency modulation capacity revenue, frequency modulation mileage revenue and total revenue.
TABLE 1
Cost/dollar | Energy market revenue/dollar | FM capacity gain/yuan | FM mileage earnings/yuan | Total profit/yuan | |
Situation one | 1.95*10 5 | 6.48*10 5 | 7.49*10 3 | 59.93 | 4.60*10 5 |
Situation two | 1.99*10 5 | 6.48*10 5 | 2.24*10 4 | 236.80 | 4.71*10 5 |
Amount of change | +362 | 0 | +1.49*10 3 | +176.87 | +1.15*10 3 |
As can be seen from table 1, the profit of scenario one and scenario two in the energy market are both 6.48 ten thousand yuan; in the frequency modulation market, the difference of the two scene profits is larger, the second scene increases 0.149 ten thousand yuan in the frequency modulation capacity benefit compared with the first scene, reaches 2.24 ten thousand yuan, and meanwhile, the frequency modulation mileage benefit also increases 176.87 yuan, reaches 236.8 yuan; the cost in scenario two is slightly increased, 362 yuan is increased compared with scenario one, and 1.99 ten thousand yuan is achieved. In the aspect of total income, the first scene is 4.6 ten thousand yuan, and the second scene is increased by 0.115 ten thousand yuan compared with the first scene, so that the total income reaches 4.71 ten thousand yuan. Therefore, under the thermoelectric unit power output control method facing the frequency modulation market, more frequency modulation market benefits are mined, the frequency modulation capacity benefits and the frequency modulation mileage benefits obtained by the thermoelectric unit in the frequency modulation market are higher, and the total benefits are also improved.
Example 2
A thermoelectric unit power output control system oriented to frequency modulation market comprises:
the model building module is used for adjusting the thermal output of the thermoelectric unit based on the thermal output and thermal storage characteristics of the heat storage device in the feasible operating domain range of the thermoelectric unit to obtain the electric power output of the corresponding thermoelectric unit, and further obtain the upper frequency modulation capacity and the lower frequency modulation capacity of the thermoelectric unit in the frequency modulation market; constructing a target function based on the power output of the thermoelectric unit and the upper frequency modulation capacity and the lower frequency modulation capacity corresponding to the thermoelectric unit in the frequency modulation market, so as to establish a frequency modulation market optimization model;
the power output control module is used for inputting the maximum thermal output power and the thermal storage power of the heat storage device and the thermal output of the thermoelectric unit at the current moment into the frequency modulation market optimization model for solving to obtain the optimal power output of the thermoelectric unit at the current moment;
the objective function is:
wherein T is a time domain;is composed oftOutputting the electric power of the thermoelectric generator set at any moment;is composed oftThe unit electric energy yield of the thermoelectric unit is obtained at any time;is composed oftThe corresponding upper frequency modulation capacity of the lower thermoelectric unit in the frequency modulation market at any moment;is composed oftThe lower frequency modulation capacity of the thermoelectric unit in the frequency modulation market at any moment;is composed oftThe unit capacity gain of the thermoelectric unit is realized at any time;is a frequency modulation mileage ratio;is composed oftThe unit frequency modulation mileage income of the thermoelectric unit is obtained at the moment;is composed oftOutputting the heat of the thermoelectric unit at any moment;the unit heat output cost of the thermoelectric unit is obtained;the unit power output cost of the thermoelectric power unit.
The related technical solution is the same as embodiment 1, and is not described herein.
Example 3
A thermoelectric unit power output control system oriented to frequency modulation market comprises: the thermoelectric generator set power output control method for the frequency modulation market provided by the embodiment 1 of the invention is executed when the computer program is executed by the processor.
The related technical scheme is the same as embodiment 1, and is not described herein.
Example 4
A computer-readable storage medium, which includes a stored computer program, wherein when the computer program is executed by a processor, the storage medium controls a device to execute the method for controlling the power output of the thermoelectric generation set facing the frequency modulation market, provided by embodiment 1 of the present invention.
The related technical scheme is the same as embodiment 1, and is not described herein.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A thermoelectric unit power output control method for the frequency modulation market is characterized by comprising the following steps: inputting the maximum thermal output power and the maximum thermal storage power of the heat storage device and the thermal output of the thermoelectric unit at the current moment into a frequency modulation market optimization model for solving to obtain the optimal power output of the thermoelectric unit at the current moment;
the method for constructing the market optimization model comprises the following steps:
s1, in a feasible region range of operation of the thermoelectric unit, based on the thermal output and thermal storage characteristics of the heat storage device, adjusting the thermal output of the thermoelectric unit to obtain the electric power output of the corresponding thermoelectric unit, and further obtaining the upper frequency modulation capacity and the lower frequency modulation capacity of the thermoelectric unit in the frequency modulation market;
s2, constructing an objective function based on the power output of the thermoelectric unit and the corresponding upper frequency modulation capacity and lower frequency modulation capacity of the thermoelectric unit in a frequency modulation market, and accordingly establishing the frequency modulation market optimization model;
the objective function is:
wherein T is a time domain;is composed oftOutputting power of the thermoelectric generator set at any time;is composed oftThe unit electric energy yield of the thermoelectric unit is obtained at any time;is composed oftThe corresponding upper frequency modulation capacity of the lower thermoelectric unit in the frequency modulation market at any moment;is composed oftThe lower frequency modulation capacity of the thermoelectric unit in the frequency modulation market at any moment;is composed oftThe unit frequency modulation capacity gain of the thermoelectric unit is realized at the moment;is a frequency modulation mileage ratio;is composed oftThe unit frequency modulation mileage income of the thermoelectric unit is obtained at the moment;is composed oftOutputting the heat of the thermoelectric unit at any moment;the unit heat output cost of the thermoelectric unit;the unit power output cost of the thermoelectric power unit.
2. The method for controlling the power output of the thermoelectric power unit facing the frequency modulation market according to claim 1, wherein the feasible region for the operation of the thermoelectric power unit comprises: upper boundary A 1 B 1 Lower boundary A 2 B 2 Left boundary A 1 A 2 And a right boundary B 1 B 2 ;
Wherein the upper boundary A 1 B 1 Representing an upper limit of the power output of the thermoelectric power unit; the lower boundary A 2 B 2 Represents a lower limit of the power output of the thermoelectric power unit; the left boundary A 1 A 2 Represents the lower limit of the thermal output of the thermoelectric unit; the right boundary B 1 B 2 Representing the upper limit of the thermal output of the thermoelectric unit.
3. A method for controlling the power output of a thermoelectric generator set facing a frequency modulated market according to claim 2, wherein the upper boundary A is defined by 1 B 1 To the power output ofThe relationship to the thermal output Q is:
4. The method for controlling the power output of the thermoelectric generating set facing the frequency modulation market according to claim 3, wherein the corresponding upper frequency modulation capacity of the thermoelectric generating set in the frequency modulation marketAnd a lower frequency-modulation capacityComprises the following steps:
wherein,is composed oftThe thermal output adjustment amount corresponding to the frequency modulation on the thermoelectric unit at any moment;is composed oftOutputting the adjustment quantity of the heat power corresponding to the time of frequency modulation under the thermoelectric unit at the moment;the maximum thermal output power of the heat storage device;storing power for a maximum thermal power of the heat storage device;andbetween the left boundary A 1 A 2 And the right boundary B 1 B 2 In the meantime.
5. A thermoelectric generating set power output control method oriented to frequency modulation market according to claim 4, characterized in that when the control method is applied, the control method is executedAndwhen the number of the positive lines is negative,andsatisfies the following conditions:,。
6. a thermoelectric generating set power output control method oriented to frequency modulation market according to claim 4, characterized in that when the control method is applied, the control method is executedIs positive number, andwhen the number is a negative number, the number is,andsatisfies the following conditions:,。
7. a thermoelectric generating set power output control method oriented to frequency modulation market according to claim 4, characterized in that when the control method is applied, the control method is executedIs negative, andwhen the number is positive, the number of the first and second groups is positive,andsatisfies the following conditions:,。
9. the utility model provides a thermoelectric unit power output control system towards frequency modulation market which characterized in that includes:
the model building module is used for adjusting the thermal output of the thermoelectric unit based on the thermal output and thermal storage characteristics of the heat storage device in the feasible operating domain range of the thermoelectric unit to obtain the electric power output of the corresponding thermoelectric unit, and further obtain the upper frequency modulation capacity and the lower frequency modulation capacity of the thermoelectric unit in the frequency modulation market; constructing a target function based on the power output of the thermoelectric unit and the upper frequency modulation capacity and the lower frequency modulation capacity corresponding to the thermoelectric unit in the frequency modulation market, so as to establish a frequency modulation market optimization model;
the power output control module is used for inputting the maximum thermal output power and the thermal storage power of the heat storage device and the thermal output of the thermoelectric unit at the current moment into the frequency modulation market optimization model for solving to obtain the optimal power output of the thermoelectric unit at the current moment;
the objective function is:
wherein T is a time domain;is composed oftOutputting the electric power of the thermoelectric generator set at any moment;is composed oftThe unit electric energy yield of the thermoelectric unit is obtained at any time;is composed oftThe corresponding upper frequency modulation capacity of the lower thermoelectric unit in the frequency modulation market at any moment;is composed oftThe lower frequency modulation capacity of the thermoelectric unit in the frequency modulation market at any moment;is composed oftThe unit capacity gain of the thermoelectric unit is realized at any time;the frequency modulation mileage ratio is obtained;is composed oftThe unit frequency modulation mileage income of the thermoelectric unit is obtained at the moment;is composed oftOutputting the heat of the thermoelectric unit at any moment;the unit heat output cost of the thermoelectric unit is obtained;the unit power output cost of the thermoelectric power unit.
10. A computer-readable storage medium, comprising a stored computer program, wherein when the computer program is executed by a processor, the storage medium controls a device to execute the method for controlling power output of a thermoelectric power generation unit facing a frequency modulation market according to any one of claims 1 to 8.
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