CN114050588A - Novel electric power system adjustable reserve capacity calculation method taking new energy as main body - Google Patents
Novel electric power system adjustable reserve capacity calculation method taking new energy as main body 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
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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
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
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- H—ELECTRICITY
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Abstract
The invention relates to a novel method for calculating adjustable reserve capacity of an electric power system based on new energy, which is characterized in that for a source network charge and storage cooperative control system, conventional power generation adjustable reserve which ensures minimum generated energy convention is analyzed and considered, new energy adjustable reserve which considers new energy consumption rate, energy storage adjustable reserve which considers SOC limitation and flexible load adjustable reserve which considers minimum power consumption demand and cut-off frequency limitation are analyzed and considered, and the comprehensive adjustable reserve capacity of the electric power system is obtained through summarizing and calculating, so that more comprehensive and accurate adjustable reserve capacity of the electric power system is obtained, and reliable data support is provided for source network charge and storage cooperative control.
Description
Technical Field
The invention relates to the technical field of power system operation control, in particular to a novel method for calculating adjustable reserve capacity of a power system by taking new energy as a main body.
Background
In a novel power system taking new energy as a main body, the load side regulation capacity is excavated, the variable source moves along with the load to be a source network and a load storage interaction so as to comprehensively improve the regulation and control capacity of a power grid, and the high-efficiency consumption of clean energy and the improvement of the operation efficiency and benefit of the power grid are supported, so that the novel power system becomes the inevitable trend of the development of the power grid in the future. In a traditional power system, the adjustable capacity of a power grid system only comprises the adjustable capacity of a frequency modulation power plant (or a frequency modulation unit), in a source grid load storage cooperative control system, devices participating in regulation and control are more various, and besides a conventional frequency modulation power plant (or a frequency modulation unit), the source grid load storage cooperative control system also comprises a new energy station, an energy storage power station, a flexible load and the like capable of regulating output, so that the regulation and control capacity of more device types is also considered in the system adjustable spare capacity calculation.
Disclosure of Invention
Based on the above situation in the prior art, the invention aims to provide a novel method for calculating the adjustable reserve capacity of the power system with new energy as a main body, and the method is used for analyzing and calculating the conventional adjustable reserve power generation considering the minimum generated energy convention, the new adjustable reserve power generation considering the new energy consumption rate, the energy storage adjustable reserve power consumption considering the SOC limit and the flexible load adjustable reserve power consumption considering the minimum power consumption demand and the cut-off frequency limit to obtain the comprehensive adjustable reserve capacity of the power system aiming at the source network load and storage cooperative control system.
In order to achieve the above object, according to an aspect of the present invention, there is provided a method for calculating an adjustable spare capacity of a new power system mainly based on new energy, including:
calculating the adjustable spare capacity of new energy power generation equipment in the power system;
calculating the adjustable spare capacity of conventional power generation equipment in the power system;
calculating the adjustable spare capacity of energy storage equipment in the power system;
calculating adjustable flexible load and adjustable spare capacity of the switchable flexible load in the power system;
and calculating the adjustable spare capacity of the power system according to the adjustable spare capacities of the new energy power generation equipment, the conventional power generation equipment, the energy storage equipment, the adjustable flexible load and the switchable flexible load in the power system.
Further, the calculating the adjustable reserve capacity of the new energy power generation equipment in the power system comprises calculating a positive adjustable reserve capacity of the new energy power generation equipment in the power system according to the following formula:
wherein, Pneg_spr_upFor positive adjustable reserve capacity, P, of new energy power plantsineg_maxIs the current maximum adjustable active power of the ith new energy station, PinegThe current active power of the new energy station.
Further, the calculating the adjustable reserve capacity of the new energy power generation equipment in the power system includes calculating a negative adjustable reserve capacity of the new energy power generation equipment in the power system according to the following formula:
wherein, Pneg_spr_dwnFor negative adjustable reserve capacity, P, of new energy power plantineg_minFor the current minimum adjustable active power, P, of the ith new energy stationcsmFor regional new energy consumption rate, Pcsm_minTo set a minimum new energy consumption rate.
Further, the calculating the adjustable reserve capacity of the conventional power generation equipment in the power system includes calculating a positive adjustable reserve capacity of the conventional power generation equipment in the power system according to the following formula:
wherein, Ptrd_spr_upFor positive adjustable reserve capacity, P, of conventional power plantsitrd_maxIs the current maximum adjustable active power, P, of the ith conventional frequency modulation power plant or frequency modulation unititrdIs its current active power.
Further, the calculating the adjustable reserve capacity of the conventional power generation equipment in the power system includes calculating a negative adjustable reserve capacity of the conventional power generation equipment in the power system according to the following formula:
wherein, Pitrd_spr_dwnFor negative adjustable reserve capacity, P, of the ith conventional FM plant or FM unititrdFor the current active power, Pitrd_minTo a minimum generated power, WitrdGenerating electric power for the current day/month, Witrd_minAppointing the minimum generation electric quantity for the day/month;
Ptrd_spr_dwnis the negative adjustable reserve capacity of conventional power plants.
Further, the calculating the adjustable reserve capacity of the energy storage device in the power system includes calculating a positive adjustable reserve capacity and a negative adjustable reserve capacity of the energy storage device in the power system according to the following formulas:
wherein, Pstr_spr_upFor positive adjustable reserve capacity, P, of energy storage devicesstr_spr_dwnFor negative adjustable reserve capacity, P, of energy storage devicesistrgFor the current charge and discharge power, P, of the ith energy storage deviceistrg_dschrg_maxFor maximum discharge active power, P, of the energy storage deviceistrg_chrg_maxMaximum charging active power for the energy storage device;
further, the calculating the adjustable backup capacity of the adjustable flexible load in the power system includes calculating a positive adjustable backup capacity of the adjustable flexible load in the power system according to the following formula:
wherein, Piadjld_spr_upPositive adjustable reserve capacity for the ith adjustable flexible load, PiadjldFor the current active power, Piadjld_minTo minimum required electrical power, WiadjldFor the current day/month electricity consumption, Wiadjld_maxThe maximum daily/monthly power consumption and electricity demand is met;
Padjld_spr_upa positive adjustable back-up capacity for an adjustable flexible load.
Further, the calculating the adjustable backup capacity of the adjustable flexible load in the power system includes calculating a negative adjustable backup capacity of the adjustable flexible load in the power system according to the following formula:
wherein, Padjld_spr_dwnNegative adjustable spare capacity, P, for adjustable flexible loadsiadjld_maxThe maximum available electrical power for each adjustable flexible load.
Further, the calculating the adjustable back-up capacity of the switchable flexible load in the power system includes calculating a positive adjustable back-up capacity of the switchable flexible load in the power system according to the following formula:
wherein, Pibrkld_spr_upPositive regulation of reserve capacity, P, for the ith switchable compliant loadibrkldFor the current power consumption, TSibrkldThe number of times of turn-off of the switch on the day/month, TSibrkld_maxMaximum number of off times of day/month switch, WibrkldThe amount of electricity consumed for each day/month, Wibrkld_maxThe lowest electricity consumption quantity is day/month;
Pbrkld_spr_upa positive adjustable reserve capacity for cutting flexible loads.
Further, the adjustable reserve capacity of the power system is calculated according to the following formula:
Pspr_up＝Pneg_spr_up+Ptrd_spr_up+Pstr_spr_up+Padjld_spr_up+Pbrkld_spr_up
Pspr_dwn＝Pneg_spr_dwn+Ptrd_spr_dwn+Pstr_spr_dwn+Padjld_spr_dwn
wherein, Pspr_upFor positive regulation of reserve capacity, P, of electric power systemsspr_dwnAnd the adjustable spare capacity is loaded for the power system.
In summary, the invention provides a novel method for calculating the adjustable reserve capacity of the power system based on new energy, which is used for analyzing, considering the conventional adjustable reserve for power generation, which is agreed by the minimum generated energy, the adjustable reserve for new energy, which is considered by the consumption rate of new energy, the adjustable reserve for energy storage, which is considered by the SOC limitation, and the adjustable reserve for flexible load, which is considered by the minimum power consumption requirement and the limitation of the cut-off times, aiming at the source network charge-storage cooperative control system, and performing summary calculation to obtain the comprehensive adjustable reserve capacity of the power system, so that more comprehensive and accurate adjustable reserve capacity of the power system is obtained, and reliable data support is provided for the source network charge-storage cooperative control.
Drawings
Fig. 1 is a flowchart of a method for calculating an adjustable spare capacity of a power system according to an embodiment 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 will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. According to an embodiment of the invention, a method for calculating adjustable spare capacity of a novel power system with new energy as a main body is provided, the method for calculating the adjustable spare capacity of the novel power system analyzes conventional power generation adjustable spare power with minimum power generation stipulation guaranteed, new energy adjustable spare power with new energy consumption rate considered, energy storage adjustable spare power with SOC limit considered and flexible load adjustable spare power with minimum power consumption demand and cutting frequency limit considered for a source network load and storage cooperative control system, and obtains the comprehensive adjustable spare capacity of the power system by summarizing calculation, wherein a flow chart of the method is shown in fig. 1 and comprises the following steps:
calculating the adjustable spare capacity of new energy power generation equipment in the power system;
calculating the adjustable spare capacity of conventional power generation equipment in the power system;
calculating the adjustable spare capacity of energy storage equipment in the power system;
calculating adjustable flexible load and adjustable spare capacity of the switchable flexible load in the power system;
and calculating the adjustable spare capacity of the power system according to the adjustable spare capacities of the new energy power generation equipment, the conventional power generation equipment, the energy storage equipment, the adjustable flexible load and the switchable flexible load in the power system.
The respective steps will be described in detail below.
1. Adjustable spare capacity of new energy power generation equipment
And calculating the adjustable spare capacity of the new energy by analyzing the maximum and minimum adjustable active power of the new energy and considering the consumption rate of the new energy. And calculating the adjustable standby capacity of the current new energy according to the current active power, the maximum adjustable active power and the minimum adjustable active power transmitted by the new energy station and by considering the consumption rate of the new energy.
The new energy positive adjustable reserve represents the capacity range of the new energy which can increase output, the sum of the maximum adjustable active power and the current active power of each new energy station can be used as the sum, and the positive adjustable reserve capacity of the new energy power generation equipment in the power system can be calculated according to the following formula:
wherein, Pneg_spr_upFor positive adjustable reserve capacity, P, of new energy power plantsineg_maxIs the current maximum adjustable active power of the ith new energy station, PinegThe current active power of the new energy station.
The new energy negative adjustable standby characteristic new energy can reduce the output degree, and under the normal condition, the new energy negative adjustable standby is the sum of the difference between the current active power and the minimum adjustable active power of each new energy station. In order to guarantee maximum consumption of new energy, the consumption rate of the new energy needs to be considered when calculating negative adjustable reserve of the new energy, the new energy is not subjected to power limiting control when the consumption rate of the new energy is smaller than a set value, the new energy is adjusted to be reserved to be 0, and the negative adjustable reserve capacity of new energy power generation equipment in the power system can be calculated according to the following formula:
wherein, Pneg_spr_dwnFor negative adjustable reserve capacity, P, of new energy power plantineg_minFor the current minimum adjustable active power, P, of the ith new energy stationcsmFor regional new energy consumption rate, Pcsm_minTo set a minimum new energy consumption rate.
2. Adjustable spare capacity for conventional power generation equipment
And calculating the adjustable reserve capacity of the conventional power generation by analyzing the maximum and minimum adjustable work of the conventional frequency modulation unit or the frequency modulation power plant and considering the minimum power generation amount of the power plant. The conventional power generation participating in the adjustable standby calculation of the power system mainly comprises a hydroelectric frequency modulation power plant (or a frequency modulation unit) and a thermal power frequency modulation power plant (or a frequency modulation unit), and is similar to a new energy adjustable standby analysis method, and the conventional power generation adjustment standby capacity of a power grid is calculated according to the current active power, the maximum adjustable active power and the minimum adjustable active power transmitted by the frequency modulation power plant (or the frequency modulation unit).
The normal power generation positive adjustable reserve is the sum of the difference between the maximum adjustable active power and the current active power of each frequency modulation power plant (or frequency modulation unit), and the positive adjustable reserve capacity of the normal power generation equipment in the power system is calculated according to the following formula:
wherein, Ptrd_spr_upFor positive adjustable reserve capacity, P, of conventional power plantsitrd_maxIs the current maximum adjustable active power, P, of the ith conventional frequency modulation power plant or frequency modulation unititrdIs its current active power.
Normally, the conventional power generation negative adjustable standby is the sum of the difference between the current active power and the minimum adjustable active power of each conventional frequency modulation power plant (or frequency modulation unit). However, in order to maintain a certain economic benefit of a conventional power plant, when calculating the negative adjustable reserve of the conventional power generation, only the unit or the power plant with the power generation amount exceeding the minimum limit is limited, that is, the adjustment capability of a single power plant or unit is firstly evaluated, then the adjustable reserve capacity of the system is comprehensively calculated, and the negative adjustable reserve capacity of a single conventional frequency modulation power plant (or frequency modulation unit) is as follows:
wherein, Pitrd_spr_dwnFor negative adjustable reserve capacity, P, of the ith conventional FM plant or FM unititrdFor the current active power, Pitrd_minTo a minimum generated power, WitrdGenerating electric power for the current day/month, Witrd_minAppointing the minimum generation electric quantity for the day/month; system conventional power generation negative adjustable standby Ptrd_spr_dwnThe sum of the negative adjustable spare capacities of each conventional frequency modulation power plant or frequency modulation unit is as follows:
Ptrd_spr_dwnis the negative adjustable reserve capacity of conventional power plants.
3. Adjustable standby capacity of energy storage device
And calculating the energy storage adjustable standby by analyzing the maximum charging power, the maximum discharging power and the current SOC of the energy storage power station. And calculating the maximum charging active power, the maximum discharging active power, the positive regulation standby power and the negative regulation standby power of the power grid according to the current active power, the maximum charging active power, the maximum discharging active power and the energy storage residual electric quantity SOC sent by the energy storage power station. In the source network charge-storage cooperative control system, the direction of the stored energy charge-discharge power is defined to be positive along with the direction of the generated power, namely the stored energy discharge is positive and the charge is negative.
According to the current SOC of the energy storage power stationiMaximum SOCimaxMinimum SOCiminCorrecting the maximum charging active power and the maximum discharging active power of the energy storage power station, when the SOC isiGreater than maximum SOCimaxThe stored energy is not allowed to be charged, and the maximum charging active power P is obtained at the momentistrg_chrg_maxIs 0, when SOC isiLess than minimum SOCiminThe energy storage is not allowed to discharge, and the large discharge active power Pistrg_dschrg_maxIs 0.
The energy storage device has the same function as the power generation device during discharging of the stored energy and provides positive adjustable standby for the power grid, and the energy storage device can be used as a load during charging of the stored energy and provides negative adjustable standby for the power grid. The energy storage positive adjustable standby is the sum of the differences between the maximum discharge power and the current charge and discharge power of each energy storage station, and the energy storage negative adjustable standby is the sum of the differences between the maximum charge power and the current charge and discharge power of each energy storage station:
wherein, Pstr_spr_upFor positive adjustable reserve capacity, P, of energy storage devicesstr_spr_dwnFor negative adjustable reserve capacity, P, of energy storage devicesistrgFor the current charge and discharge power, P, of the ith energy storage deviceistrg_dschrg_maxFor maximum discharge active power, P, of the energy storage deviceistrg_chrg_maxAnd the maximum charging active power is provided for the energy storage equipment.
4. Adjustable flexible load and adjustable spare capacity for cutting flexible load
And respectively analyzing the adjusting capacity of the flexible adjustable load and the flexible switchable load to calculate the adjustable spare capacity of the flexible load. For the power grid, the reduction of the load power consumption is equal to the increase of the power generation, so that the positive adjustable spare capacity of the flexible load on the power grid is equivalent to the capacity of the flexible load which can reduce the power consumption, and the negative adjustable spare capacity is equivalent to the capacity of the flexible load which can increase the power consumption. The method can be divided into an adjustable flexible load and a switchable flexible load according to a flexible load adjusting mode, the adjustable flexible load is mainly the electric load with continuously adjustable electric power such as a micro-grid and a charging and switching station, and the switchable flexible load is mainly the non-important load with the function of interrupting power supply at any time. And (4) analyzing the regulation and control capability of the adjustable flexible load and the switchable flexible load respectively by considering different regulation and control power ranges and different regulation and control modes.
For an adjustable flexible load, the positive adjustable standby is the difference value between the current power consumption and the minimum required power consumption, and the minimum power consumption requirement meeting the load needs to be considered when the positive adjustable standby is calculated, namely, the power consumption limitation control can be only carried out on the load meeting the minimum power consumption requirement. The positive adjustment of the single adjustable flexible load is standby as follows:
wherein, Piadjld_spr_upPositive adjustable reserve capacity for the ith adjustable flexible load, PiadjldFor the current active power, Piadjld_minTo minimum required electrical power, WiadjldFor the current day/month electricity consumption, Wiadjld_maxIs a day/monthThe maximum power consumption and electricity demand; the positive adjustable reserve of the adjustable flexible load of the system is the sum of the positive adjustable reserve of each adjustable flexible load:
Padjld_spr_upa positive adjustable back-up capacity for an adjustable flexible load.
The adjustable flexible load is adjustable and is standby under the condition of maximizing the power consumption of the load, namely the maximum available electric power P of each adjustable flexible loadiadjld_maxWith the current power consumption PiadjldSum of differences:
wherein, Padjld_spr_dwnNegative adjustable spare capacity, P, for adjustable flexible loadsiadjld_maxThe maximum available electrical power for each adjustable flexible load.
In the source network load storage cooperative control, the frequency of opening and closing the load switch every day needs to be considered in order to prolong the service life of the load switch, and meanwhile, in order to maintain the basic power consumption of the load, the power consumption cutting control is only carried out on the load which meets the minimum power consumption and has the frequency of opening and closing the switch which is less than the set frequency.
The positive adjustment reserve capacity for a single switchable compliant load is:
wherein, Pibrkld_spr_upPositive regulation of reserve capacity, P, for the ith switchable compliant loadibrkldFor the current power consumption, TSibrkldThe number of times of turn-off of the switch on the day/month, TSibrkld_maxMaximum number of off times of day/month switch, WibrkldThe amount of electricity consumed for each day/month, Wibrkld_maxIs the lowest day/monthElectricity consumption quantity; the positive adjustment reserve of the system with the switchable flexible load is the sum of the positive adjustment reserve of each single switchable flexible load:
Pbrkld_spr_upa positive adjustable reserve capacity for cutting flexible loads.
For the switchable flexible load, the power consumption for increasing the load can only be realized by switching in the switched load, but the power consumption behavior of the switched load is unpredictable and uncontrollable by an upper-layer source network and load storage coordination control system, so that the negative adjustment standby capacity of the switched load can be ignored when the adjustable standby capacity of the whole system is calculated.
5. Adjustable reserve capacity for power systems
For the source network load storage cooperative control system, the adjustable spare capacity of the system does not only comprise the adjustable spare of a conventional frequency modulation unit or a frequency modulation power plant, but also comprises the adjustable spare of a new energy station, an energy storage power station and a flexible load, and at the moment, the positive adjustable spare and the negative adjustable spare of the system are the sum of the positive adjustable spare and the negative adjustable spare of various types of equipment. The positive adjustable standby of the system is the sum of new energy positive adjustable standby, traditional power generation positive adjustable standby, energy storage positive adjustable standby, adjustable flexible load positive adjustable standby and switchable flexible load positive adjustable standby:
Pspr_up＝Pneg_spr_up+Ptrd_spr_up+Pstr_spr_up+Padjld_spr_up+Pbrkld_spr_up
Pspr_dwn＝Pneg_spr_dwn+Ptrd_spr_dwn+Pstr_spr_dwn+Padjld_spr_dwn
wherein, Pspr_upFor positive regulation of reserve capacity, P, of electric power systemsspr_dwnAnd the adjustable spare capacity is loaded for the power system.
In summary, the invention relates to a novel method for calculating the adjustable reserve capacity of the power system based on new energy, which is used for analyzing and considering the conventional adjustable reserve power generation for ensuring the minimum generated energy convention, the new energy adjustable reserve power consumption rate, the energy storage adjustable reserve power consumption limited by SOC and the flexible load adjustable reserve power consumption limited by the minimum power consumption requirement and the cut-off frequency, and calculating to obtain the comprehensive adjustable reserve capacity of the power system, thereby obtaining more comprehensive and accurate adjustable reserve capacity of the power system and providing reliable data support for the cooperative control of the source network and the storage.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A method for calculating the adjustable reserve capacity of a novel power system mainly based on new energy is characterized by comprising the following steps:
calculating the adjustable spare capacity of new energy power generation equipment in the power system;
calculating the adjustable spare capacity of conventional power generation equipment in the power system;
calculating the adjustable spare capacity of energy storage equipment in the power system;
calculating adjustable flexible load and adjustable spare capacity of the switchable flexible load in the power system;
and calculating the adjustable spare capacity of the power system according to the adjustable spare capacities of the new energy power generation equipment, the conventional power generation equipment, the energy storage equipment, the adjustable flexible load and the switchable flexible load in the power system.
2. The method of claim 1, wherein calculating the adjustable backup capacity of the new energy generation device in the power system comprises calculating a positive adjustable backup capacity of the new energy generation device in the power system according to the following formula:
wherein, Pneg_spr_upFor positive adjustable reserve capacity, P, of new energy power plantsineg_maxIs the current maximum adjustable active power of the ith new energy station, PinegThe current active power of the new energy station.
3. The method of claim 2, wherein calculating the adjustable back-up capacity of the new energy generation device in the power system comprises calculating a negative adjustable back-up capacity of the new energy generation device in the power system according to the following formula:
wherein, Pneg_spr_dwnFor negative adjustable reserve capacity, P, of new energy power plantineg_minFor the current minimum adjustable active power, P, of the ith new energy stationcsmFor regional new energy consumption rate, Pcsm_minTo set a minimum new energy consumption rate.
4. The method of claim 3, wherein calculating the tunable back-up capacity of the conventional power generation equipment in the power system comprises calculating a positive tunable back-up capacity of the conventional power generation equipment in the power system according to the following formula:
wherein, Ptrd_spr_upFor positive adjustable reserve capacity, P, of conventional power plantsitrd_maxIs the current maximum adjustable active power, P, of the ith conventional frequency modulation power plant or frequency modulation unititrdIs its current active power.
5. The method of claim 4, wherein calculating the tunable back-up capacity of the conventional power generation equipment in the power system comprises calculating a negative tunable back-up capacity of the conventional power generation equipment in the power system according to the following formula:
wherein, Pitrd_spr_dwnFor negative adjustable reserve capacity, P, of the ith conventional FM plant or FM unititrdFor the current active power, Pitrd_minTo a minimum generated power, WitrdGenerating electric power for the current day/month, Witrd_minAppointing the minimum generation electric quantity for the day/month;
Ptrd_spr_dwnis the negative adjustable reserve capacity of conventional power plants.
6. The method of claim 5, wherein calculating the tunable backup capacity of the energy storage device in the power system comprises calculating a positive tunable backup capacity and a negative tunable backup capacity of the energy storage device in the power system according to the following equations:
wherein, Pstr_spr_upFor positive adjustable reserve capacity, P, of energy storage devicesstr_spr_dwnFor negative adjustable reserve capacity, P, of energy storage devicesistrgFor the current charge and discharge power, P, of the ith energy storage deviceistrg_dschrg_maxFor maximum discharge active power, P, of the energy storage deviceistrg_chrg_maxMaximum charging active power for the energy storage device;
7. the method of claim 6, wherein calculating the adjustable back-up capacity of the adjustable flexible load in the power system comprises calculating a positive adjustable back-up capacity of the adjustable flexible load in the power system according to the following equation:
wherein, Piadjld_spr_upPositive adjustable reserve capacity for the ith adjustable flexible load, PiadjldFor the current active power, Piadjld_minTo minimum required electrical power, WiadjldFor the current day/month electricity consumption, Wiadjld_maxThe maximum daily/monthly power consumption and electricity demand is met;
Padjld_spr_upa positive adjustable back-up capacity for an adjustable flexible load.
8. The method of claim 7, wherein calculating the adjustable back-up capacity of the adjustable flexible load in the power system comprises calculating a negative adjustable back-up capacity of the adjustable flexible load in the power system according to the following equation:
wherein, Padjld_spr_dwnNegative adjustable spare capacity, P, for adjustable flexible loadsiadjld_maxThe maximum available electrical power for each adjustable flexible load.
9. The method of claim 8, wherein calculating the adjustable back-up capacity of the switchable flexible load in the power system comprises calculating a positive adjustable back-up capacity of the switchable flexible load in the power system according to the following formula:
wherein, Pidrkld_spr_upPositive regulation of reserve capacity, P, for the ith switchable compliant loadibrkldFor the current power consumption, TSibrkldThe number of times of turn-off of the switch on the day/month, TSibrkld_maxMaximum number of off times of day/month switch, WibrkldThe amount of electricity consumed for each day/month, Wibrkld_maxThe lowest electricity consumption quantity is day/month;
Pbrkld_spr_upa positive adjustable reserve capacity for cutting flexible loads.
10. The method of claim 9, wherein the power system adjustable backup capacity is calculated according to the following formula:
Pspr_up＝Pneg_spr_up+Ptrd_spr_up+Pstr_spr_up+Padjld_spr_up+Pbrkld_spr_up
Pspr_dwn＝Pneg_spr_dwn+Ptrd_spr_dwn+Pstr_spr_dwn+Padjld_spr_dwn
wherein, Pspr_upFor positive regulation of reserve capacity, P, of electric power systemsspr_dwnAnd the adjustable spare capacity is loaded for the power system.
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