CN116131333A - Adjustable capacity calculation method and system of thermal power peak shaving unit - Google Patents
Adjustable capacity calculation method and system of thermal power peak shaving unit Download PDFInfo
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- H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
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Abstract
The application belongs to the field of power systems, and particularly relates to an adjustable capacity calculation method and system of a thermal power peak shaver set. The method comprises the following steps: generating plan data of new energy generator under t period
And real-time output data P t Calculating the plan deviation value delta P at t period t The method comprises the steps of carrying out a first treatment on the surface of the Generating plan data of new energy generator under t+1 period
From the planned deviation value DeltaP at time t t Calculating the output predicted value of the new energy generator in the t+1 period
Obtaining the sum of power generation planned values of thermal power generating units with all zone bits of 1 in t+1 time period
Acquiring a tie-line switching power plan value
Full-network load predicted value P of t+1 time period and power generation planned value of nuclear power of t+1 time period
By means of
P is as follows
Calculating thermal power adjustable capacity delta P participating in electric peak regulation market T . The utility model provides a thermal power peak shaver set adjustable capacity calculation method, which considers the deviation condition of power supply types with strong fluctuation of gas electricity, water electricity, wind electricity, photovoltaic and the like, and improves the calculation accuracy of thermal power adjustable capacity in the electric peak shaver market.
Description
Technical Field
The application belongs to the field of power systems, and particularly relates to an adjustable capacity calculation method and system of a thermal power peak shaver set.
Background
Since electric energy cannot be stored in a large amount, the generation and use of electric energy are synchronized, i.e. how much electric energy is needed, and the power generation department has to generate how much electric energy synchronously. In actual production labor, the power consumption load in the power system is changed frequently, and in order to maintain the power balance and keep the system frequency stable, the power generation department needs to correspondingly change the output of the generator to adapt to the change of the power consumption load.
At present, common power supply types in a power system mainly comprise thermal power, nuclear power, gas-electricity, hydroelectric power, wind power, photovoltaic power and the like. On one hand, as the living standard is improved, the proportion of the living electricity and the commercial electricity is increased, the peak load and valley load difference of the power grid is larger and larger, and larger peak regulation requirement is brought; on the other hand, with the rapid development of a novel power system taking new energy as a main body, the new energy in the forms of large-scale wind power, photovoltaic and the like is connected into the power system, the off-peak regulation capacity of the power system is seriously reduced, the peak regulation pressure is increasingly increased, and more peak regulation tasks of the power system are required to be born by the thermal power generating unit, so that the peak regulation capacity of the thermal power generating unit is required to be calculated by the power system.
The current method for calculating the thermal power peak regulation capacity mainly comprises the following steps: and directly calculating the peak regulating capacity born by the thermal power according to the daily planned values of various power supplies. However, in the technical background that new energy sources such as wind power and photovoltaic are widely applied, especially in areas with high grid connection capacity of new energy sources such as wind power and photovoltaic, the planned value of the new energy sources such as wind power and photovoltaic can be in a certain error with the actual generation due to unstable power generation of the new energy sources such as wind power and photovoltaic. Based on the error, it is known that the peak shaving capacity borne by the thermal power generating unit obtained by direct calculation is not accurate in practice.
The peak regulation capacity born by the thermal power generating unit cannot be accurately calculated, and a certain risk is caused to the running of the power grid besides the full consumption of new energy cannot be realized. Therefore, how to improve the calculation accuracy of peak shaving capacity borne by thermal power is an urgent need to solve the technical problem.
Disclosure of Invention
In order to solve or improve the problems, the invention provides a method and a system for calculating the adjustable capacity of a thermal power peak shaver set, which concretely comprises the following technical scheme:
the invention provides a calculation method of adjustable capacity of a thermal power peak shaver set, which comprises the following steps: step 1: acquiring power generation plan data of new energy generator in t period
And real-time output data P t Using the power generation plan data +.>
And real-time output data P t Calculating the plan deviation value delta P under t period t . Step 2: acquiring power generation plan data of new energy generator in t+1 period->
Using the plan deviation value DeltaP at time t t And the power generation plan data->
Calculating the predicted output value of the new energy generator in the t+1 period>
Step 3: acquiring the zone bit of all thermal power generating units in the whole network in the t+1 period from the electric peak regulation market system, wherein the zone bit comprises 0 and 1, and acquiring the sum of power generation planned values of the thermal power generating units with the zone bit of 1 in the t+1 period based on the zone bit>
Acquiring a tie-line switching power plan value +.>
Full-network load predicted value P of t+1 period and power generation planned value of nuclear power of t+1 period +.>
Step 4: utilizing the predicted value of the output of the new energy generator in the t+1 period
The sum of power generation planned values of the thermal power generating unit is +.>
Said tie-line switching power schedule value +.>
the whole network load predicted value P of the t+1 period and the power generation planned value +.>
Calculating thermal power adjustable capacity delta P participating in electric peak regulation market T 。
Preferably, the step 4 includes: calculating thermal power adjustable capacity delta P participating in electric peak regulation market T The formula of (2) is:
wherein P is a whole network load predicted value of t+1 time period, < >>
Exchanging power schedule values for the tie-lines, +.>
Generating planned value of nuclear power in t+1 period, < >>
Predicted value of output of new energy generator in t+1 period，/>
And the power generation plan value is the power generation plan value of the nuclear power in the t+1 period.
Preferably, the step 1 includes: calculating the plan deviation value delta P under t period t The formula of (2) is:
wherein ,/>
Generating plan data of new energy generator in t period, P t And the real-time output data of the new energy generator is t time periods.
Preferably, the step 2 includes: calculating the output predicted value of the new energy generator in the t+1 period
The formula of (2) is: />
wherein ,/>
Is the power generation plan data of the new energy generator in the period of t+1, delta P t Is the planned deviation value at time t.
Preferably, the generation plan data of the new energy generator under the period of t is obtained
And real-time output data P t Comprising: acquiring power generation plan data of a gas-electricity, water-electricity, wind-electricity and photovoltaic generator under t time period +.>
And real-time output data P t 。
Preferably, the generating plan data of the new energy generator in the t+1 period is obtained
Comprising the following steps: acquiring power generation plan data of a gas-electricity, water-electricity, wind-electricity and photovoltaic generator in t+1 period +.>
Preferably, the interconnecting line exchange power plan value in the step 4
Comprising the following steps: when the sum of the switching powers of all the links is positive +.>
Taking a positive value; when the sum of the switching powers of all links is negative +.>
Take a negative value.
The application provides an adjustable capacity computing system of a thermal power peak shaver unit based on a first attack invention conception, which comprises the following components: deviation value calculation unit: acquiring power generation plan data of new energy generator in t period
And real-time output data P t Generating plan data of the new energy generator under t period>
And real-time output data P t Calculating the plan deviation value delta P under t period t . Output value prediction unit: acquiring power generation plan data of new energy generator in t+1 period->
Using the plan deviation value DeltaP at time t t Generating schedule data of the new energy generator in t+1 period +.>
Calculating the predicted output value of the new energy generator in the t+1 period>
A data acquisition unit: acquiring zone bits of all thermal power units t+1 time periods of the whole network from an electric peak regulation market system, wherein the zone bits comprise 0 and 1, and acquiring the sum of power generation planned values of the thermal power units with the t+1 time periods 1 based on the zone bits>
A second data acquisition unit: acquiring a tie-line switching power plan value
Full-network load predicted value P of t+1 period and power generation planned value of nuclear power of t+1 period +.>
Thermal power generator adjustable capacity calculating unit: output prediction value of new energy generator under t+1 period>
The sum of power generation planned values of the thermal power generating unit is +.>
Said tie-line switching power schedule value +.>
the whole network load predicted value P of the t+1 period and the power generation planned value +.>
Calculating the adjustable capacity delta P of the thermal power generator T 。
The beneficial effects of the invention are as follows: the utility model provides a thermal power peak shaver set adjustable capacity calculation method, which considers the deviation condition of power supply types with strong fluctuation of gas electricity, wind electricity, photovoltaic and the like, and effectively improves the thermal power adjustable capacity calculation accuracy in the electric peak shaver market under the condition of full consumption of clean energy.
Drawings
Fig. 1 is a flowchart of a method for calculating an adjustable capacity of a thermal power peak shaver set according to an embodiment of the invention.
Fig. 2 is a schematic block diagram of an adjustable capacity computing system of a thermal power peak shaver set according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. 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.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In order to solve or improve the technical problem of calculation accuracy of peak shaving capacity borne by thermal power, the application provides a calculation method of adjustable capacity of a thermal power peak shaving unit, a flow chart of the method is shown in fig. 1, and the calculation method of adjustable capacity of the thermal power peak shaving unit comprises the following steps:
s1: acquiring power generation plan data of new energy generator in t period
And real-time output data P t Using the power generation plan data +.>
And real-time output data P t Calculating the plan deviation value delta P under t period t 。
Specifically, the plan deviation value DeltaP at t time period is calculated t The formula of (2) is:
wherein ,/>
Generating plan data of new energy generator in t period, P t And the real-time output data of the new energy generator is t time periods.
In practical application, the power generation plan data of the new energy generator under the period t
And real-time output data P t Can be obtained from a power grid operation control system.
S2: acquiring power generation plan data of new energy generator in t+1 period
Using the plan deviation value DeltaP at time t t And the power generation plan data->
Calculating the output of the new energy generator in the t+1 periodForce prediction value->
Specifically, calculating the predicted value of the output of the new energy generator in the t+1 period
The formula of (2) is:
wherein ,/>
Is the power generation plan data of the new energy generator in the period of t+1, delta P t Is the planned deviation value at time t.
S3: acquiring zone bits of all thermal power units in the whole network in a t+1 period from an electric peak regulation market system, wherein the zone bits comprise 0 and 1, and acquiring the sum of power generation planned values of the thermal power units with the zone bits of 1 in the t+1 period based on the zone bits
Acquiring a tie-line switching power plan value +.>
Full-network load predicted value P of t+1 period and power generation planned value of nuclear power of t+1 period +.>
S4: utilizing the predicted value of the output of the new energy generator in the t+1 period
The sum of power generation planned values of the thermal power generating unit is +.>
Said tie-line switching power schedule value +.>
the whole network load predicted value P of the t+1 period and the power generation planned value +.>
Calculating thermal power adjustable capacity delta P participating in electric peak regulation market T 。
Specifically, the thermal power adjustable capacity delta P participating in the electric peak regulation market is calculated T The formula of (2) is:
wherein P is a whole network load predicted value of t+1 time period, < >>
Exchanging power schedule values for the tie-lines, +.>
Generating planned value of nuclear power in t+1 period, < >>
Output predicted value of new energy generator in t+1 period, < >>
And the power generation plan value is the power generation plan value of the nuclear power in the t+1 period.
In practical application, when the sum of the switching power of all the connecting lines is positive
Taking a positive value; when the sum of the switching powers of all links is negative +.>
Take a negative value.
Example 1
Based on the same inventive concept, this embodiment provides an adjustable capacity computing system of a thermal power peak shaver set, and a schematic block diagram of the system is shown in fig. 2, including:
deviation value calculation unit: acquiring power generation plan data of new energy generator in t period
And real-time output data P t Generating plan data of the new energy generator under t period>
And real-time output data P t Calculating the plan deviation value delta P under t period t ；
Output value prediction unit: acquiring power generation plan data of new energy generator in t+1 period
Using the plan deviation value DeltaP at time t t Generating schedule data of the new energy generator in t+1 period +.>
Calculating the predicted output value of the new energy generator in the t+1 period>
A data acquisition unit: acquiring zone bits of all thermal power units t+1 time periods of the whole network from an electric peak regulation market system, wherein the zone bits comprise 0 and 1, and acquiring the sum of power generation planned values of the thermal power units with the t+1 time periods and the zone bits of 1 based on the zone bits
A second data acquisition unit: acquiring a tie-line switching power plan value +.>
Full-network load predicted value P of t+1 period and power generation planned value of nuclear power of t+1 period +.>
/>
Thermal power generator adjustable capacity calculating unit: utilizing the predicted value of the output of the new energy generator in the t+1 period
The sum of power generation planned values of the thermal power generating unit is +.>
Said tie-line switching power schedule value +.>
the whole network load predicted value P of the t+1 period and the power generation planned value +.>
Calculating the adjustable capacity delta P of the thermal power generator T 。
Example two
In this embodiment, the electric energy source includes, in addition to the thermal power and the nuclear power, gas-electricity, hydropower, wind power, photovoltaic, i.e., the types of the new energy generator include gas-electricity, hydropower, wind power, photovoltaic generators. Therefore, the power generation plan data of the new energy power generator in the t period is acquired
And real-time output data P t Comprising the following steps: acquiring power generation plan data of a gas-electricity, water-electricity, wind-electricity and photovoltaic generator under t time period +.>
And real-time output data P t The method comprises the steps of carrying out a first treatment on the surface of the Acquiring power generation plan data of new energy generator in t+1 period->
Comprising the following steps: acquiring power generation plan data of a gas-electricity, water-electricity, wind-electricity and photovoltaic generator in t+1 period +.>
The method comprises the following specific steps:
s1: acquiring power generation plan data of new energy generator in t period
Comprising the following steps: gas-electric power generation plan data->
Hydroelectric power generation plan data->
Wind power generation plan data->
Planning data for photovoltaic power generation +.>
Simultaneously acquiring real-time output data P of new energy generator t Comprising: real-time output data of gas-electric generator>
Real-time output data of hydroelectric generator
Real-time output data of wind driven generator>
Real-time output data of photovoltaic generator>
And respectively calculating the gas electricity, water electricity, wind electricity and photovoltaic power generation plan deviation values under the period t by using the power generation plan data and the real-time output data of the generator.
Specifically, a t-period plan deviation value DeltaP is calculated t The formula of (2) is:
wherein ,/>
Generating plan data of new energy generator in t period, P t And the real-time output data of the new energy generator is t time periods.
Based on the formula and the data, in practical application, the plan deviation value delta P of the gas electricity, the water electricity, the wind electricity and the photovoltaic power generation under the period t is calculated t The formula of (1) includes:
the deviation value of the gas-electricity generation plan under the period t:
hydroelectric power generation plan deviation value under t period:
wind power generation plan deviation value at t period:
photovoltaic power generation plan deviation value at t period:
and acquiring the power generation plan data and the real-time output data of the photovoltaic generator from the power grid operation control system.
S2: acquiring power generation plan data of new energy generator in t+1 period
Comprising the following steps: generating schedule data of a gas-electric generator in the t+1 period +.>
Generating plan data of hydroelectric generator->
Generating schedule data of wind power generator->
Generating plan data of photovoltaic generator +.>
And respectively calculating the predicted values of the gas electricity, the water electricity, the wind electricity and the photovoltaic power generator in the t+1 period by using the planned deviation values of the gas electricity, the water electricity, the wind electricity and the photovoltaic power generation in the t period and the power planning data in the t+1 period.
Specifically, calculating the predicted value of the output of the new energy generator in the t+1 period
The formula of (2) is:
wherein ,/>
Is the power generation plan data of the new energy generator in the period of t+1, delta P t Is the planned deviation value at time t.
Based on the above formula and data, in practical application, the formula for calculating the output predicted values of the gas electricity, the water electricity, the wind electricity and the photovoltaic generator in the t+1 period comprises:
predicted value of output of the gas-electric generator in t+1 period:
predicted value of output of hydroelectric generator under t+1 period:
predicted output value of wind power generator in t+1 period:
output predicted value of photovoltaic generator under t+1 period:
and acquiring the power generation plan data of the new energy generator in the t+1 period from a power grid operation control system.
S3: acquiring zone bits of all thermal power units in the whole network in a t+1 period from an electric peak regulation market system, wherein the zone bits comprise 0 and 1, and acquiring the sum of power generation planned values of the thermal power units with the zone bits of 1 in the t+1 period based on the zone bits
Acquiring a tie-line switching power plan value +.>
Full-network load predicted value P of t+1 period and power generation planned value of nuclear power of t+1 period +.>
S4: utilizing the predicted value of the output of the new energy generator in the t+1 period
Comprising the following steps: predicted value of the output of the gas-electric generator in t+1 period +.>
Predicted value of the output of a hydroelectric generator>
Output predictive value of wind power generator->
Output predictive value of photovoltaic generator +.>
The sum of power generation planned values of the thermal power generating unit is +.>
Said tie-line switching power schedule value +.>
the whole network load predicted value P of the t+1 period and the power generation planned value +.>
Calculating thermal power adjustable capacity delta P participating in electric peak regulation market T 。
Specifically, the thermal power adjustable capacity delta P participating in the electric peak regulation market is calculated T The formula of (2) is:
wherein P is a whole network load predicted value of t+1 time period, < >>
Exchanging power schedule values for the tie-lines, +.>
Generating planned value of nuclear power in t+1 period, < >>
Output predicted value of new energy generator in t+1 period, < >>
And the power generation plan value is the power generation plan value of the nuclear power in the t+1 period.
Based on the above formula and data, in practical application, the formula for calculating the output predicted values of the gas electricity, the water electricity, the wind electricity and the photovoltaic generator in the t+1 period comprises:
wherein when the sum of the switching power of all the connecting lines is positive
Taking a positive value; when the sum of the switching powers of all links is negative +.>
Take a negative value.
In summary, the application provides a method and a system for calculating the adjustable capacity of a thermal power unit, which consider the deviation situation of power supply types with strong fluctuation, such as gas electricity, water electricity, wind electricity, photovoltaic and the like, when calculating the peak regulating capacity of the thermal power unit. Under the condition of full consumption of clean energy, the calculation accuracy of the thermal power adjustable capacity in the electric peak shaving market is effectively improved.
Those of ordinary skill in the art will appreciate that the elements of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the elements of the examples have been described generally in terms of functionality in the foregoing description to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in this application, it should be understood that the division of units is merely a logic function division, and there may be other manners of division in practical implementation, for example, multiple units may be combined into one unit, one unit may be split into multiple units, or some features may be omitted.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
Claims (8)
1. The method for calculating the adjustable capacity of the thermal power peak shaver set is characterized by comprising the following steps of:
step 1: acquiring power generation plan data of new energy generator in t period
And real-time output data P t Using the power generation plan data +.>
And real-time output data P t Calculating the plan deviation value delta P under t period t ；
Step 2: acquiring power generation plan data of new energy generator in t+1 period
Using the plan deviation value DeltaP at time t t And the power generation plan data->
Calculating the predicted output value of the new energy generator in the t+1 period>
Step 3: acquiring zone bits of all thermal power units in the whole network in t+1 time period from an electric peak regulation market system, wherein the zone bits comprise 0 and 1, and acquiring 1 of all zone bits in the t+1 time period based on the zone bitsSum of power generation plan values of thermal power generating unit
Acquiring a tie-line switching power plan value +.>
Full-network load predicted value P of t+1 period and power generation planned value of nuclear power of t+1 period +.>
Step 4: utilizing the predicted value of the output of the new energy generator in the t+1 period
The sum of power generation planned values of the thermal power generating unit is +.>
Said tie-line switching power schedule value +.>
the whole network load predicted value P of the t+1 period and the power generation planned value +.>
Calculating thermal power adjustable capacity delta P participating in electric peak regulation market T 。
2. The method for calculating the adjustable capacity of the thermal power peak shaver set according to claim 1, wherein the step 4 comprises the following steps:
calculating thermal power adjustable capacity delta P participating in electric peak regulation market T The formula of (2) is:
wherein P is a full network load predicted value of t+1 time period,
exchanging power schedule values for the tie-lines, +.>
Generating planned value of nuclear power in t+1 period, < >>
Output predicted value of new energy generator in t+1 period, < >>
And the power generation plan value is the power generation plan value of the nuclear power in the t+1 period.
3. The method for calculating the adjustable capacity of the thermal power peak shaver set according to claim 1, wherein the step 1 comprises the following steps:
calculating the plan deviation value delta P under t period t The formula of (2) is:
wherein ,
generating plan data of new energy generator in t period, P t And the real-time output data of the new energy generator is t time periods.
4. The method for calculating the adjustable capacity of the thermal power peak shaver set according to claim 1, wherein the step 2 comprises the following steps:
calculating the output predicted value of the new energy generator in the t+1 period
The formula of (2) is:
wherein ,
is the power generation plan data of the new energy generator in the period of t+1, delta P t Is the planned deviation value at time t.
5. The method for calculating the adjustable capacity of the thermal power peak shaver set according to claim 1, wherein the generation plan data of the new energy generator in the t period is obtained
And real-time output data P t Comprising: />
Acquiring power generation plan data of a gas-electricity, water-electricity, wind-electricity and photovoltaic generator in a t period
And real-time output data P t 。
6. The method for calculating the adjustable capacity of the thermal power peak shaver set according to claim 1, wherein the generation plan data of the new energy generator in the t+1 period is obtained
Comprising the following steps:
acquiring power generation plan data of a gas-electricity, water-electricity, wind-electricity and photovoltaic generator in t+1 period
7. The method for calculating the adjustable capacity of a thermal power peak shaver set according to claim 1, wherein the interconnecting line exchange power plan value in the step 4
Comprising the following steps:
when the sum of the switching power of all the connecting lines is positive
Taking a positive value;
when the sum of the switching powers of all the links is negative
Take a negative value.
8. An adjustable capacity computing system of a thermal power peak shaver set, which is characterized by comprising:
deviation value calculation unit: acquiring power generation plan data of new energy generator in t period
And real-time output data P t Generating plan data of the new energy generator under t period>
And real-time output data P t Calculating the plan deviation value delta P under t period t ；
Output value prediction unit: acquiring power generation plan data of new energy generator in t+1 period
Using the plan deviation value DeltaP at time t t Generating schedule data of the new energy generator in t+1 period +.>
Calculating the predicted output value of the new energy generator in the t+1 period>
A data acquisition unit: acquiring zone bits of all thermal power units t+1 time periods of the whole network from an electric peak regulation market system, wherein the zone bits comprise 0 and 1, and acquiring the sum of power generation planned values of the thermal power units with the t+1 time periods and the zone bits of 1 based on the zone bits
A second data acquisition unit: acquiring a tie-line switching power plan value +.>
Full-network load predicted value P of t+1 period and power generation planned value of nuclear power of t+1 period +.>
Thermal power generator adjustable capacity calculating unit: utilizing the predicted value of the output of the new energy generator in the t+1 period
The sum of power generation planned values of the thermal power generating unit is +.>
Said tie-line switching power schedule value +.>
the whole network load predicted value P of the t+1 period and the power generation planned value +.>
Calculating the thermal power generatorAdjustable capacity Δp T 。/>
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