CN113131475A - Dynamic regulation and control method of comprehensive energy system - Google Patents
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Abstract
The invention belongs to the technical field of comprehensive energy network digital simulation, and particularly relates to a dynamic regulation and control method of a comprehensive energy system. The method fully considers the multi-energy coupling characteristic of the comprehensive energy system, the cross-time scale corresponding characteristic of heterogeneous energy, external energy price influence factors, the energy storage space-time difference and the like, positions the priority of the adjustable energy source according to the energy price and the energy coupling conversion characteristic in a scheduling period, determines the regulation and control instruction distribution of different adjustment sources under the condition of fully considering the energy storage space-time difference and the adjustable source climbing characteristic, and realizes the economy and the safety of the dynamic operation of the comprehensive energy system. The regulation and control method is particularly suitable for operation regulation and control of the net zero energy consumption building comprehensive energy system, is also suitable for dynamic regulation and control of the general park level comprehensive energy system, and has better application prospect.
Description
Technical Field
The invention belongs to the technical field of comprehensive energy network digital simulation, and particularly relates to a dynamic regulation and control method of a comprehensive energy system.
Background
With the continuous development of distributed comprehensive energy systems, the net zero energy consumption building comprehensive energy system plays an important role, and the dynamic operation regulation of the net zero energy consumption building comprehensive energy system becomes a difficult point due to the complex scene, the coupling of various types of energy, the existence of multi-energy complementary characteristics, obvious dynamic response time difference, large energy price span in different time periods and the like of the building comprehensive energy system.
The optimization strategy of the current net zero energy consumption building comprehensive energy system is mainly in a static optimization level, the key point is on planning design, and researches on a dynamic operation regulation and control method of the net zero energy consumption building comprehensive energy system based on source-network-load-storage are less, and the problems of the instantaneous unbalance characteristic of source load, the output change of equipment based on the coupling equipment under the condition of different time periods and different energy prices, the climbing characteristic caused by the response time scale difference of different types of energy and the like are involved.
Disclosure of Invention
The invention aims to provide a dynamic regulation and control method of a comprehensive energy system, which is improved aiming at the existing scheduling method of the net zero energy consumption building comprehensive energy system, determines regulation and control instruction distribution of different regulation sources under the condition of fully considering energy storage space-time difference and adjustable source climbing characteristics, and realizes the economy and safety of dynamic operation of the comprehensive energy system.
The invention provides a dynamic regulation and control method of a comprehensive energy system, which comprises the following steps: distinguishing energy sources according to the characteristics of the comprehensive energy system, and calculating the total regulation and control target values of different types of controllable energy sources according to the actual output of the system energy sources and the required difference of each target load; under the condition of setting the regulation priority of different types of energy sources, calculating the instruction allocation of the different types of controllable energy sources according to factors such as the climbing characteristics of the different types of energy sources, the instantaneous balance of the fast process type energy, the coupling equipment capacity constraint and the like; and updating the capacity upper limit constraints of different types of controllable energy source equipment according to the actual output of the energy coupling equipment and different energy coupling forms, thereby realizing the dynamic regulation and control of the net zero energy consumption building comprehensive energy system of the multi-energy coupling.
The invention provides a dynamic regulation and control method of a comprehensive energy system, which has the characteristics and advantages that:
the dynamic regulation and control method of the comprehensive energy system fully considers the multi-energy coupling characteristic of the comprehensive energy system, the cross-time scale corresponding characteristic of heterogeneous energy, external energy price influence factors, the energy storage space-time difference and the like, positions the priority of the adjustable energy source according to the energy price and the energy coupling conversion characteristic in a scheduling period, determines the regulation and control instruction distribution of different regulation sources under the condition of fully considering the energy storage space-time difference and the adjustable source climbing characteristic, and realizes the economy and the safety of the dynamic operation of the comprehensive energy system. The method fully considers the climbing characteristics of different energy devices, the complementary characteristics of various types of energy, the instantaneous balance of fast-process electric energy and the instantaneous unbalance of slow-process non-electric energy, so that the method is particularly suitable for the operation regulation and control of a net zero energy consumption building comprehensive energy system and the dynamic regulation and control of a general park level comprehensive energy system, and has better application prospect.
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FIG. 1 is a block flow diagram of the method of the present invention.
Detailed Description
According to the dynamic regulation and control method of the comprehensive energy system, energy sources are distinguished according to the characteristics of the comprehensive energy system, and the total regulation and control target values of different types of controllable energy sources are calculated according to the actual output of the system energy sources and the requirement difference of each target load; under the condition of setting the regulation priority of different types of energy sources, calculating the instruction allocation of the different types of controllable energy sources according to factors such as the climbing characteristics of the different types of energy sources, the instantaneous balance of the fast process type energy, the coupling equipment capacity constraint and the like; and updating the capacity upper limit constraints of different types of controllable energy source equipment according to the actual output of the energy coupling equipment and different energy coupling forms, thereby realizing the dynamic regulation and control of the net zero energy consumption building comprehensive energy system of the multi-energy coupling.
The flow chart of the embodiment of the dynamic regulation and control method of the comprehensive energy system provided by the invention is shown in fig. 1, and the specific steps are as follows:
(1) setting the energy sources of the net zero energy consumption building comprehensive energy system to be a heat source, a cold source and a power source; dividing the heat sources into controllable heat sources and uncontrollable heat sources according to the safety regulation and control requirements, wherein the number of the controllable heat sources is b, and the number of the uncontrollable heat sources is nb; dividing a cold source into a controllable cold source and an uncontrollable cold source, wherein the number of the controllable cold source is d, and the number of the uncontrollable cold source is nd; dividing a power supply into a controllable power supply, an uncontrollable power supply and a frequency modulation power supply, wherein the number of the controllable power supplies is a, the number of the frequency modulation power supplies is g, and the number of the uncontrollable power supplies is na; recording the current regulation and control time of the comprehensive energy system as t, calculating the step length of the regulation and control model as delta t,is the running state identification of the No. i controllable power supply, the running state identification of the controllable power supply when the controllable power supply stops runningGet 0, running state mark when controllable power supply runsTaking 1;is the running state mark of the j controllable heat source, the running state mark when the controllable heat source stops running0 is taken, and the running state mark is marked when the controllable heat source runsTaking 1;the controllable cold source is the operation state identification of the kth controllable cold source, and the controllable cold source stops operatingTaking 0, controlling the running of cold sourceTaking 1;for the dispatching command of the electric load of the comprehensive energy system at the time t given by the dispatching layer,for the scheduling command of the thermal load of the integrated energy system at the time t given by the scheduling layer,initializing the device type Y of the controllable heat source for the dispatching command of the cooling load of the integrated energy system at the time t given by the dispatching layerjInitializing a controllable cold source device type Z, wherein the device type is 0 for a conventional type, 1 for a linear coupling type, and 2 for a capacity constraint coupling typekThe controllable cold source equipment is a conventional type, namely 0, and the controllable cold source equipment is a cold and hot continuous supply type, namely 1; the controllable cold source subscript i is 1,2 … d, the controllable heat source subscript j is 1,2 … b, the frequency modulation power source subscript l is 1,2 … g, and the controllable cold source subscript k is 1,2 … d;
(2) respectively collecting output electric loads of uncontrollable power supplies at t momentWherein ii is 1,2 … na; thermal load of each uncontrollable heat source outputWherein jj ═ 1,2 … nb; output cooling load of each uncontrollable cooling sourceWherein kk 1,2 … nd; the total output electric load of the uncontrollable power supply in the comprehensive energy system is calculated by the following formulaTotal output heat load of uncontrollable heat sourceAnd total output cooling load of uncontrollable cooling source
(3) Using step (2)Andscheduling instructions according to upper layer loads of the integrated energy system given by the scheduling layerThe total electric load regulation and control set value of the controllable power supply of the comprehensive energy system is calculated by using the following formulaTotal heat load regulation set value of controllable heat sourceAnd the total cold load regulation set value of the controllable cold source
(4) Calculating to obtain a regulation and control set value of the ith controllable power supply at the t moment by using the following formula
In the formula (I), the compound is shown in the specification,the upper limit value of the capacity of each controllable power supply at time t is a known quantity, question mark? "is a logical judgment identifier, judges the inequality before the question mark, if the first term value after the question mark is taken, and if the first term value after the question mark is not taken, the second term value after the question mark is taken;
(5) according to the regulation and control set value of each adjustable and control power supply in the step (4)Calculating the regulation and control target value of each controllable power supply at the time t by combining the climbing rate characteristic of each controllable power supply and utilizing the following formula
In the formula, kpiThe climbing rate of the controllable power supply i is a known quantity, is related to the characteristics of the controllable power supply and is determined by the equipment;
(6) calculating the power grid frequency deviation of the comprehensive energy system at the time t by using the following formulaAnd recording and storing the power grid frequency deviation in the t-delta t time comprehensive energy system (comprising different types of energy networks such as a power grid, a heat supply network, a cold supply network and a gas supply network)And power grid frequency deviation of the system at the time of t-2 delta t
In the formula (f)tIs the sampling frequency, f of the power grid of the comprehensive energy system at the moment t0Is the target frequency, f, of the power grid0Taking 50 HZ; f. of0The frequency is determined by the fixed frequency of the power system specified by the state, the electricity frequency of China is 50HZ, and the electricity frequency of foreign countries is 60 HZ.
(7) According to step (6)Andcalculating the regulation target value of each frequency modulation power supply by using the following formula in combination with the frequency modulation characteristics of the frequency modulation power supplies
In the formula, KP,l、KB,lAnd KB,lAn integral regulation coefficient, a proportional regulation coefficient and a differential regulation coefficient which are respectively dynamically regulated and controlled by the No. l frequency modulation power supply, KP,l、KB,lAnd KB,lThe response characteristic of the frequency modulation power supply is related and is a known quantity;
(8) the upper limit of the capacity of the controllable heat source No. j is obtained by the following formula
In the formula,YjIdentification value, η, for controllable heat source equipment typejIs a linear coupling constant of a controllable heat source device, of known quantity, Pe,jElectric power output for the collected j number controllable heat source, Lsum,jThe upper limit of the total energy supply capacity of the controllable heat source No. j is a known quantity;
(9) according to the regulation and control set value of the system controllable heat source calculated in the step (3)Operation mark combined with controllable heat sourceCalculating the regulation and control set value of each controllable heat source at the time t by using the following formula
In the formula (I), the compound is shown in the specification,the upper limit value of the capacity of each controllable heat source at the time t in the step (8);
(10) according to the regulation and control set value of each controllable heat source in the step (9)And calculating and updating the regulation and control target values of the controllable heat sources at the t moment by using the following formula in combination with the climbing rate characteristics of the controllable heat sources
In the formula, kqjFor controlled rate of ascent of each heat sourceThe ramp rate is related to the response characteristic of the controllable heat source and is a known quantity;
(11) according to the heat supply power Q output by the collected k-number controllable cold source equipmenth,kCombined with controllable cold source equipment type identification value ZkAnd updating the upper limit value of the cold capacity of the k number controllable cold source equipment at the time t by using the following formula
In the formula, Lsum,kThe upper limit of the total energy supply capacity of the controllable cold source equipment of the number k is related to the cold source equipment and is a known quantity;
(12) according to the total regulation and control set value of the controllable cold source of the comprehensive energy system calculated in the step (3)Operation mark combined with controllable cold sourcesThe regulation and control set value of each controllable cold source at the time t is calculated by using the following formula
In the formula (I), the compound is shown in the specification,the upper limit value of the capacity of each controllable cold source at the time t in the step (11);
(13) according to the regulation and control set value of each controllable cold source in the step (12)And calculating and updating the regulation and control target values of the controllable cold sources at the t moment by using the following formula in combination with the climbing rate characteristics of the controllable cold sources
In the formula, kckThe climbing rate of each controllable cold source is related to the response characteristic of the controllable cold source and is a known quantity;
(14) regulating target value at time t of each controllable power supply according to the steps (5), (7), (10) and (13) aboveRegulating target value of each frequency modulation power supplyControl target value of each controllable heat sourceAnd the regulation target value of each controllable cold sourceThe value of (2) realizes the dynamic regulation and control of the period for each energy source in the comprehensive energy system.
Claims (2)
1. A dynamic regulation and control method of an integrated energy system is characterized in that: distinguishing energy sources according to the characteristics of the comprehensive energy system, and calculating the total regulation and control target values of different types of controllable energy sources according to the actual output of the system energy sources and the required difference of each target load; under the condition of setting the regulation priority of different types of energy sources, calculating the instruction allocation of the different types of controllable energy sources according to factors such as the climbing characteristics of the different types of energy sources, the instantaneous balance of the fast process type energy, the coupling equipment capacity constraint and the like; and updating the capacity upper limit constraints of different types of controllable energy source equipment according to the actual output of the energy coupling equipment and different energy coupling forms, thereby realizing the dynamic regulation and control of the net zero energy consumption building comprehensive energy system of the multi-energy coupling.
2. The dynamic control method of the integrated energy system according to claim 1, characterized in that the method comprises the following steps:
(1) setting the energy source of the comprehensive energy system to be a heat source, a cold source and a power supply; dividing the heat sources into controllable heat sources and uncontrollable heat sources, wherein the number of the controllable heat sources is b, and the number of the uncontrollable heat sources is nb; dividing a cold source into a controllable cold source and an uncontrollable cold source, wherein the number of the controllable cold source is d, and the number of the uncontrollable cold source is nd; dividing a power supply into a controllable power supply, an uncontrollable power supply and a frequency modulation power supply, wherein the number of the controllable power supplies is a, the number of the frequency modulation power supplies is g, and the number of the uncontrollable power supplies is na; recording the current regulation and control time of the comprehensive energy system as t, calculating the step length of the regulation and control model as delta t,is the running state identification of the No. i controllable power supply, the running state identification of the controllable power supply when the controllable power supply stops runningGet 0, running state mark when controllable power supply runsTaking 1;is the running state mark of the j controllable heat source, the running state mark when the controllable heat source stops running0 is taken, and the running state mark is marked when the controllable heat source runsTaking 1;the controllable cold source is the operation state identification of the kth controllable cold source, and the controllable cold source stops operatingTaking 0, controlling the running of cold sourceTaking 1;for the dispatching command of the electric load of the comprehensive energy system at the time t given by the dispatching layer,for the scheduling command of the thermal load of the integrated energy system at the time t given by the scheduling layer,initializing the device type Y of the controllable heat source for the dispatching command of the cooling load of the integrated energy system at the time t given by the dispatching layerjInitializing a controllable cold source device type Z, wherein the device type is 0 for a conventional type, 1 for a linear coupling type, and 2 for a capacity constraint coupling typekThe controllable cold source equipment is a conventional type, namely 0, and the controllable cold source equipment is a cold and hot continuous supply type, namely 1; the controllable cold source subscript i is 1,2 … d, the controllable heat source subscript j is 1,2 … b, the frequency modulation power source subscript l is 1,2 … g, and the controllable cold source subscript k is 1,2 … d;
(2) respectively collecting output electric loads of uncontrollable power supplies at t momentWherein ii is 1,2 … na; thermal load of each uncontrollable heat source outputWherein jj ═ 1,2 … nb; output cooling load of each uncontrollable cooling sourceWherein kk 1,2 … nd; the total output electric load of the uncontrollable power supply in the comprehensive energy system is calculated by the following formulaTotal output heat load of uncontrollable heat sourceAnd total output cooling load of uncontrollable cooling source
(3) Using step (2)Andscheduling instructions according to upper layer loads of the integrated energy system given by the scheduling layerThe total electric load regulation and control set value of the controllable power supply of the comprehensive energy system is calculated by using the following formulaTotal heat load regulation set value of controllable heat sourceAnd the total cold load regulation set value of the controllable cold source
(4) Calculating to obtain a regulation and control set value of the ith controllable power supply at the t moment by using the following formula
In the formula (I), the compound is shown in the specification,the upper limit value of the capacity of each controllable power supply at time t is a known quantity, question mark? "is a logical judgment identifier, judges the inequality before the question mark, if the first term value after the question mark is taken, and if the first term value after the question mark is not taken, the second term value after the question mark is taken;
(5) according to the regulation and control set value of each adjustable and control power supply in the step (4)Calculating the regulation and control target value of each controllable power supply at the time t by combining the climbing rate characteristic of each controllable power supply and utilizing the following formula
In the formula, kpiThe ramp rate of the controllable power supply i is determined by the equipment per se and is a known quantity;
(6) calculating the power grid frequency deviation of the comprehensive energy system at the time t by using the following formulaAnd recording and storing the power grid frequency deviation in the comprehensive energy system at the t-delta t momentAnd power grid frequency deviation of the system at the time of t-2 delta t
In the formula (f)tIs the sampling frequency, f of the power grid of the comprehensive energy system at the moment t0Is the target frequency, f, of the power grid0Taking 50 HZ;
(7) according to step (6)Andcalculating the regulation target value of each frequency modulation power supply by using the following formula in combination with the frequency modulation characteristics of the frequency modulation power supplies
In the formula, KP,l、KB,lAnd KB,lAn integral regulation coefficient, a proportional regulation coefficient and a differential regulation coefficient which are respectively dynamically regulated and controlled by the No. l frequency modulation power supply, KP,l、KB,lAnd KB,lThe response characteristic of the frequency modulation power supply is related and is a known quantity;
(8) the upper limit of the capacity of the controllable heat source No. j is obtained by the following formula
In the formula, YjIdentification value, η, for controllable heat source equipment typejIs a linear coupling constant of a controllable heat source device, of known quantity, Pe,jElectric power output for the collected j number controllable heat source, Lsum,jThe upper limit of the total energy supply capacity of the controllable heat source No. j is a known quantity;
(9) according to the regulation and control set value of the system controllable heat source calculated in the step (3)Operation mark combined with controllable heat sourceCalculating the regulation and control set value of each controllable heat source at the time t by using the following formula
In the formula (I), the compound is shown in the specification,for each controllable heat source at time t of step (8)An upper limit value of the capacity;
(10) according to the regulation and control set value of each controllable heat source in the step (9)And calculating and updating the regulation and control target values of the controllable heat sources at the t moment by using the following formula in combination with the climbing rate characteristics of the controllable heat sources
In the formula, kqjThe climbing rate of each controllable heat source is related to the response characteristic of the controllable heat source and is a known quantity;
(11) according to the heat supply power Q output by the collected k-number controllable cold source equipmenth,kCombined with controllable cold source equipment type identification value ZkAnd updating the upper limit value Lt of the cold capacity of the k number controllable cold source equipment at the time t by using the following formulac,k:
In the formula, Lsum,kThe upper limit of the total energy supply capacity of the controllable cold source equipment of the number k is related to the cold source equipment and is a known quantity;
(12) according to the total regulation and control set value of the controllable cold source of the comprehensive energy system calculated in the step (3)Operation mark combined with controllable cold sourcesThe regulation and control set value of each controllable cold source at the time t is calculated by using the following formula
In the formula (I), the compound is shown in the specification,the upper limit value of the capacity of each controllable cold source at the time t in the step (11);
(13) according to the regulation and control set value of each controllable cold source in the step (12)And calculating and updating the regulation and control target values of the controllable cold sources at the t moment by using the following formula in combination with the climbing rate characteristics of the controllable cold sources
In the formula, kckThe climbing rate of each controllable cold source is related to the response characteristic of the controllable cold source and is a known quantity;
(14) regulating target value at time t of each controllable power supply according to the steps (5), (7), (10) and (13) aboveRegulating target value of each frequency modulation power supplyControl target value of each controllable heat sourceAnd the regulation target value of each controllable cold sourceThe value of (2) realizes dynamic regulation and control of each energy source in the comprehensive energy system.
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WO2022227360A1 (en) * | 2021-04-28 | 2022-11-03 | 清华大学 | Dynamic regulation and control method for integrated energy system |
CN115173415A (en) * | 2022-09-07 | 2022-10-11 | 华电电力科学研究院有限公司 | Comprehensive energy system and optimal regulation and control method |
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