System-friendly power station planning method for safe and reliable power supply of wind and light storage cluster

Abstract

The invention provides a system-friendly power station planning method for safe and reliable power supply of a wind and light storage cluster. The method comprises the following steps: calculating construction cost and maintenance cost corresponding to a first capacity of at least one wind power generation unit, and / or a second capacity of at least one photovoltaic power generation unit, and a third capacity of an energy storage assembly; calculating power purchase cost and power generation income; target net cost is calculated, the target net cost is the difference value between a first sum value and the income, and the first sum value is the sum of the construction cost, the maintenance cost and the electricity purchase cost; adjusting the first capacity, the second capacity and the third capacity until the corresponding target net cost reaches the minimum value; and building the power station based on the first capacity, the second capacity and the third capacity. The power supply reliability of the power station is improved.

Description

Technical Field

[0001] The present invention relates to the field of power technology, and particularly relates to a method for planning a system-friendly power station for safe and reliable power supply of a wind-solar-storage cluster. Background Art

[0002] New energy power generation can reduce carbon dioxide emissions and is a new direction for the development of the power technology field. New energy power generation includes various types, such as wind power generation, photovoltaic power generation, and nuclear power generation, etc. However, due to the obvious influence of weather and time on wind power generation and photovoltaic power generation, the role of new energy power stations in supporting power supply during peak electricity consumption is relatively limited. Especially when there is a power gap during the noon and evening peak hours in areas with concentrated new energy development, they cannot provide effective peak power output, resulting in poor power supply reliability of the power stations.

[0003] It can be seen that there is a problem of poor power supply reliability in power stations in the existing technology. Summary of the Invention

[0004] Embodiments of the present invention provide a method for planning a system-friendly power station for safe and reliable power supply of a wind-solar-storage cluster to solve the problem of poor power supply reliability in power stations in the existing technology.

[0005] To solve the above problems, the present invention is implemented as follows:

[0006] In a first aspect, embodiments of the present invention provide a method for planning a system-friendly power station for safe and reliable power supply of a wind-solar-storage cluster. The power station includes an energy storage component, a booster station, and at least one wind power generation unit and / or at least one photovoltaic power generation unit. The energy storage component is used to dispatch wind power and / or photovoltaic power. The method includes:

[0007] Calculating the construction cost and maintenance cost corresponding to the first capacity of the at least one wind power generation unit, and / or the second capacity of the at least one photovoltaic power generation unit, and the third capacity of the energy storage component;

[0008] Calculating the power purchase cost and power generation income;

[0009] Calculating the target net cost, where the target net cost is the difference between the first sum value and the income, and the first sum value is the sum of the construction cost, the maintenance cost, and the power purchase cost;

[0010] Adjusting the first capacity, the second capacity, and the third capacity until the corresponding target net cost reaches the lowest value;

[0011] Constructing the power station based on the first capacity, the second capacity, and the third capacity.

[0012] In one embodiment, the construction cost is calculated by the following formula:

[0013]

[0014] C cc is the construction cost is the rated installed capacity of the i-th photovoltaic power generation unit, and the sum of the rated installed capacities of all photovoltaic power generation units is the first capacity is the construction cost per unit capacity of the photovoltaic power generation unit is the rated installed capacity of the i-th wind power generation unit, and the sum of the rated installed capacities of all wind power generation units is the second capacity is the construction cost per unit capacity of the wind power generation unit is the rated installed capacity of the i-th energy storage unit included in the energy storage component, and the sum of the rated installed capacities of all energy storage units is the third capacity is the construction cost per unit capacity of the i-th energy storage unit, r is the discount rate, and n is the operation time

[0015] The maintenance cost is calculated by the following formula

[0016]

[0017] C mc is the maintenance cost is the annual operation and maintenance cost per unit capacity of the at least one photovoltaic power generation unit is the annual operation and maintenance cost per unit capacity of the at least one wind power generation unit is the annual operation and maintenance cost per unit capacity of the i-th energy storage unit

[0018] The power purchase cost is calculated by the following formula

[0019]

[0020] C buy is the power purchase cost is the price at which the energy storage component purchases electricity and charges at time t, P grid (t) is the power at which the energy storage component purchases electricity and charges at time t

[0021] The power generation revenue is calculated by the following formula

[0022]

[0023] C sell is the power generation revenue is the on-grid price at time t is the on-grid power of the i-th photovoltaic power generation unit at time t is the grid-connected power of the i-th wind power generation unit at time t, is the discharging grid-connected power of the i-th energy storage unit at time t.

[0024] In one embodiment, the third capacity is greater than or equal to a preset power threshold, and the preset power threshold is obtained by the following method:

[0025] Obtain the per-unit value output curve of wind power corresponding to the at least one wind power generation unit, and / or the per-unit value output curve of photovoltaic power corresponding to the at least one photovoltaic power generation unit, as well as the load curve and the upper transmission power limit of the booster station;

[0026] Based on the third capacity, the per-unit value output curve of wind power and the per-unit value output curve of photovoltaic power, calculate the wind power and the photovoltaic power;

[0027] Calculate the load power based on the load curve;

[0028] Calculate a first difference power, where the first difference power is the difference between a second sum value and the load power, and the second sum value is the sum of the wind power and the photovoltaic power;

[0029] Calculate the preset power threshold, where the preset power threshold is the difference between the first difference power and the upper transmission power limit.

[0030] In one embodiment, the product of the third capacity and the rated energy storage duration is greater than or equal to a preset electricity threshold, and the preset electricity threshold is obtained by the following method:

[0031] Obtain the continuous energy storage duration of the energy storage component;

[0032] Calculate a second difference power, where the second difference power is the absolute value of the difference between a third sum value and the second sum value, and the third sum value is the sum of the load power and the upper transmission power limit;

[0033] Based on the continuous energy storage duration and the second difference power, calculate the preset electricity threshold.

[0034] In one embodiment, the stored electricity of the energy storage component is greater than the supplied electricity, and the stored electricity is obtained by the following method:

[0035] Obtain the first power generation duration of the at least one wind power generation unit, and / or the second power generation duration of the at least one photovoltaic power generation unit, as well as the grid charging power and the charging duration corresponding to the grid charging power;

[0036] Calculate a first amount of electricity based on the wind power and the first power generation duration; and / or calculate a second amount of electricity based on the photovoltaic power and the second power generation duration;

[0037] Calculate a third amount of electricity based on the grid charging power and the charging duration;

[0038] Calculate the stored amount of electricity, where the stored amount of electricity is the sum of the first amount of electricity and / or the second amount of electricity, and the third amount of electricity;

[0039] The supplied amount of electricity is obtained by the following method:

[0040] Obtain the power fed into the grid and the discharging duration of the energy storage component;

[0041] Calculate the supplied amount of electricity based on the power fed into the grid and the discharging duration.

[0042] In one embodiment, after building the power station based on the first capacity, the second capacity, and the third capacity, the method further includes:

[0043] Obtain the predicted power generation related parameters of the power station, where the predicted power generation related parameters are the parameters for predicting the power generation situation of the power station within a preset time period;

[0044] Send the predicted power generation related parameters to the dispatching center;

[0045] Receive a dispatching plan, where the dispatching plan is the plan of the power station generated by the dispatching center based on a preset grid dispatching plan and the predicted power generation related parameters;

[0046] Conduct power dispatching based on the dispatching plan.

[0047] In one embodiment, after receiving the dispatching plan, the method further includes:

[0048] Receive a real-time dispatching instruction sent by the dispatching center;

[0049] The conducting power dispatching based on the dispatching plan includes:

[0050] Conduct power dispatching based on the dispatching plan and the real-time dispatching instruction.

[0051] In a second aspect, an embodiment of the present invention further provides a system-friendly power station planning device for safely and reliably supplying power to a wind-solar-storage cluster. The power station includes an energy storage component, a booster station, and at least one wind power generation unit and / or at least one photovoltaic power generation unit. The energy storage component is used to dispatch wind power and / or photovoltaic power. The device includes:

[0052] A first calculation module, configured to calculate construction costs and maintenance costs corresponding to the first capacity of the at least one wind power generation unit, and / or the second capacity of the at least one photovoltaic power generation unit, and the third capacity of the energy storage component;

[0053] A second calculation module, configured to calculate power purchase costs and power generation revenues;

[0054] A third calculation module, configured to calculate a target net cost, where the target net cost is the difference between a first sum value and the revenue, and the first sum value is the sum of the construction cost, the maintenance cost, and the power purchase cost;

[0055] An adjustment module, configured to adjust the first capacity, the second capacity, and the third capacity until the corresponding target net cost reaches the minimum value;

[0056] A construction module, configured to construct the power station based on the first capacity, the second capacity, and the third capacity.

[0057] In a third aspect, an embodiment of the present invention further provides an electronic device, including a processor, a memory, and a computer program stored on the memory and executable on the processor. When the computer program is executed by the processor, the steps in the system-friendly power station planning method for secure and reliable power supply of a wind-solar-storage cluster as described in the first aspect above are implemented.

[0058] In a fourth aspect, an embodiment of the present invention further provides a readable storage medium for storing a program. When the program is executed by a processor, the steps in the system-friendly power station planning method for secure and reliable power supply of a wind-solar-storage cluster as described in the first aspect above are implemented.

[0059] In a fifth aspect, an embodiment of the present invention further provides a computer program product, including computer instructions. When the computer instructions are executed by a processor, the steps in the system-friendly power station planning method for secure and reliable power supply of a wind-solar-storage cluster as described in the first aspect above are implemented.

[0060] In an embodiment of the present invention, parameters related to predicted power generation of a power station are obtained. The parameters related to predicted power generation are parameters for predicting the power generation situation of the power station within a preset time period. The power station includes an energy storage component, a step-up substation, and at least one wind power generation unit and / or at least one photovoltaic power generation unit. The energy storage component is used to dispatch wind power and / or photovoltaic power. The first capacity of the at least one wind power generation unit and / or the second capacity of the at least one photovoltaic power generation unit, and the third capacity of the energy storage component are determined based on the at least one wind power generation unit and / or the at least one photovoltaic power generation unit, and cost-related parameters of the energy storage component. The cost-related parameters are used to characterize the at least one wind power generation unit and / or the at least one photovoltaic power generation unit, and the costs of constructing and maintaining the energy storage component. The parameters related to predicted power generation are sent to a dispatching center. A dispatching plan is received. The dispatching plan is a plan for the power station generated by the dispatching center based on a preset grid dispatching plan and the parameters related to predicted power generation. Power dispatching is performed based on the dispatching plan. In this way, by configuring an energy storage component in the power station, the power station can achieve stable power supply. At the same time, by sending the parameters related to predicted power generation to the dispatching center and realizing stable power dispatching based on the dispatching plan sent by the dispatching center, the curtailment rate of wind power and photovoltaic power is reduced. Description of the Drawings

[0061] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0062] Figure 1 It is a flowchart of a method for planning a system-friendly power station for safe and reliable power supply of a wind-solar-storage cluster provided by an embodiment of the present invention;

[0063] Figure 2 It is a schematic diagram of capacity configuration provided by an embodiment of the present invention;

[0064] Figure 3 It is a schematic diagram of peak shaving provided by an embodiment of the present invention;

[0065] Figure 4 It is a schematic diagram of the structure of a power station provided by an embodiment of the present invention;

[0066] Figure 5 It is a structural diagram of a device for planning a system-friendly power station for safe and reliable power supply of a wind-solar-storage cluster provided by an embodiment of the present invention;

[0067] Figure 6 It is a structural diagram of an electronic device provided by an embodiment of the present invention. Detailed Embodiments

[0068] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0069] Please refer to Figure 1 , Figure 1 which is a flowchart of a method for planning a system-friendly power station for safe and reliable power supply of a wind-solar-storage cluster provided by an embodiment of the present invention. The power station includes an energy storage component, a booster station, and at least one wind power generation unit and / or at least one photovoltaic power generation unit. The energy storage component is used to dispatch wind power and / or photovoltaic power. As Figure 1 shown, it includes the following steps:

[0070] Step 101, calculate the construction cost and maintenance cost corresponding to the first capacity of the at least one wind power generation unit, and / or the second capacity of the at least one photovoltaic power generation unit, and the third capacity of the energy storage component;

[0071] Step 102, calculate the power purchase cost and power generation income;

[0072] Step 103, calculate the target net cost, where the target net cost is the difference between the first sum value and the income, and the first sum value is the sum of the construction cost, the maintenance cost, and the power purchase cost;

[0073] Step 104, adjust the first capacity, the second capacity, and the third capacity until the corresponding target net cost reaches the minimum value;

[0074] Step 105, construct the power station based on the first capacity, the second capacity, and the third capacity.

[0075] The above power station can generate wind power and / or photovoltaic power to achieve clean energy power generation. Specifically, the power station includes at least one wind power generation unit and / or at least one photovoltaic power generation unit. Wind power generation is carried out through at least one wind power generation unit, and photovoltaic power generation is carried out through at least one photovoltaic power generation unit.

[0076] It should be noted that the stability of wind power generation and photovoltaic power generation is relatively poor. To improve the power supply stability of the entire system, the power station is also equipped with energy storage components. When the power generation power of at least one wind power generation unit and / or at least one photovoltaic power generation unit is greater than the demand of the power grid, the excess power is stored through the energy storage components; when at least one wind power generation unit and / or at least one photovoltaic power generation unit does not meet the demand of the power grid, the insufficient part of the power supply is supplemented, thereby improving the stability of the power station and achieving the goal of building a friendly power station.

[0077] The above-mentioned parameters related to predicted power generation are parameters for predicting the power generation situation of the power station within a preset time period, including at least one of parameters such as the maximum peak power, the maximum peak power quantity, the maximum reverse charging power, and the maximum reverse charging power quantity. By predicting the parameters related to power generation, the dispatching center can confirm the power generation capacity of the power station within a preset time period, and then set a dispatching plan according to the power generation capacity of the power station to achieve the dispatching of the power station's electricity.

[0078] Among them, the parameters related to predicted power generation can be calculated by the power station based on parameters such as weather parameters, environmental parameters, and light condition parameters within a preset time period. In some embodiments, at least one of the weather parameters, environmental parameters, and light condition parameters can be processed through a preset weather model to obtain the parameters related to predicted power generation.

[0079] Specifically, the historical data of the power station can be obtained. The historical data includes historical parameters related to power generation, and at least one of historical weather parameters, historical environmental parameters, and historical light condition parameters; the historical data is divided into training set data and test set data; the initial model is trained through the training set data to obtain an intermediate training model; the test set data is processed through the intermediate training model to calculate the loss value; when the loss value is less than the preset loss threshold, the intermediate training model is set as the preset weather model.

[0080] The above-mentioned step-up substation is used to connect with at least one wind power generation unit and / or at least one photovoltaic power generation unit, as well as energy storage components and the power grid. Through the step-up substation, the electricity of the power station can be transmitted to the power grid, and power can be obtained from the power grid to reverse charge the energy storage components.

[0081] The above construction cost and maintenance cost are for the construction and maintenance of at least one wind power generation unit and / or at least one photovoltaic power generation unit, and the energy storage component. It should be noted that the larger the capacity of the wind power generation unit, photovoltaic power generation unit or energy storage component in the power station construction, the higher the cost. However, an overly large capacity will result in power surplus, and the power grid cannot consume this part of the power, and the cost is too high, leading to a problem of resource waste. Therefore, during the process of configuring the power station, it is necessary to consider the construction and maintenance costs, so that the power station can meet the power supply demand and reduce the cost as much as possible, thereby reducing resource waste and improving resource utilization rate.

[0082] In an embodiment of the present invention, calculate the construction cost and maintenance cost corresponding to the first capacity of the at least one wind power generation unit, and / or the second capacity of the at least one photovoltaic power generation unit, and the third capacity of the energy storage component; calculate the power purchase cost and power generation income; calculate the target net cost, where the target net cost is the difference between the first sum value and the income, and the first sum value is the sum of the construction cost, the maintenance cost and the power purchase cost; adjust the first capacity, the second capacity and the third capacity until the corresponding target net cost reaches the minimum value; construct the power station based on the first capacity, the second capacity and the third capacity. By calculating the construction cost, maintenance cost, power purchase cost and power generation income, the first capacity, second capacity and third capacity are calculated to minimize the corresponding cost and avoid resource waste.

[0083] It should be noted that ordinary new energy power stations only need to consider the power generation components and do not include energy storage components. When configuring the power station capacity, only the construction and maintenance costs of the power generation components need to be considered. However, in this application, the power station also includes an energy storage component, which can realize the storage of electricity. In this way, by charging the energy storage component when the power cost of the power grid is low and discharging when the power cost of the power grid is high, the system cost can be further reduced and the power generation efficiency can be improved through charging and discharging. Therefore, the power purchase cost and power generation income of the energy storage component also need to be considered.

[0084] Specifically, the target net cost can be expressed by the following formula:

[0085]

[0086] is the minimum target net cost, C cc is the construction cost, C mc is the maintenance cost, C buy is the purchase cost, C sell is the power generation income.

[0087] In one embodiment, the construction cost is calculated by the following formula:

[0088]

[0089] C cc is the construction cost, is the rated installed capacity of the i-th photovoltaic power generation unit, and the sum of the rated installed capacities of all photovoltaic power generation units is the first capacity, is the construction cost per unit capacity of the photovoltaic power generation unit, is the rated installed capacity of the i-th wind power generation unit, and the sum of the rated installed capacities of all wind power generation units is the second capacity, is the construction cost per unit capacity of the wind power generation unit, is the rated installed capacity of the i-th energy storage unit included in the energy storage component, and the sum of the rated installed capacities of all energy storage units is the third capacity, is the construction cost per unit capacity of the i-th energy storage unit, r is the discount rate, and n is the operation time;

[0090] The maintenance cost is calculated by the following formula:

[0091]

[0092] C mc is the maintenance cost, is the annual operation and maintenance cost per unit capacity of the at least one photovoltaic power generation unit, is the annual operation and maintenance cost per unit capacity of the at least one wind power generation unit, is the annual operation and maintenance cost per unit capacity of the i-th energy storage unit;

[0093] The power purchase cost is calculated by the following formula:

[0094]

[0095] C buy is the power purchase cost, is the price at which the energy storage component purchases electricity and charges at time t, P grid (t) is the power at which the energy storage component purchases electricity and charges at time t,

[0096] The power generation revenue is calculated by the following formula:

[0097]

[0098] C sell is the power generation revenue, is the on-grid price at time t, is the on-grid power of the i-th photovoltaic power generation unit at time t, is the on-grid power of the i-th wind power generation unit at time t, is the power fed into the grid by the i-th energy storage unit at time t.

[0099] In the embodiments of the present invention, the construction cost, maintenance cost, purchase cost, and power generation revenue corresponding to the third capacity of at least one wind power generation unit and / or at least one photovoltaic power generation unit, and the energy storage component are calculated through the above formula. Furthermore, the target net cost can be calculated, and the capacity can be adjusted through the target net cost, thereby obtaining the first capacity, the second capacity, and the third capacity.

[0100] In one embodiment, the third capacity is greater than or equal to a preset power threshold, and the preset power threshold is obtained through the following method:

[0101] Obtain the per-unit value output curve of the wind power corresponding to the at least one wind power generation unit, and / or the per-unit value output curve of the photovoltaic power corresponding to the at least one photovoltaic power generation unit, as well as the load curve and the upper transmission power limit of the booster station;

[0102] Based on the third capacity, the per-unit value output curve of the wind power, and the per-unit value output curve of the photovoltaic power, calculate the wind power and the photovoltaic power;

[0103] Calculate the load power based on the load curve;

[0104] Calculate a first difference power, where the first difference power is the difference between a second sum value and the load power, and the second sum value is the sum of the wind power and the photovoltaic power;

[0105] Calculate the preset power threshold, where the preset power threshold is the difference between the first difference power and the upper transmission power limit.

[0106] It should be noted that when configuring the capacity of the energy storage component in the power station, the energy storage capacity needs to consider the power generation of at least one wind power generation unit and / or at least one photovoltaic power generation unit. If the power generation is greater than the demand power of the power grid, there is an excess of power generation at this time, and the excess power generation needs to be consumed by the energy storage component to maintain the stability of the system.

[0107] Among them, the third capacity being greater than or equal to the preset power threshold can be expressed by the following formula:

[0108]

[0109] P overlimit is the preset power threshold.

[0110] The per-unit output power curve corresponding to the above-mentioned at least one wind power generation unit, and / or the per-unit output power curve corresponding to the above-mentioned at least one photovoltaic power generation unit are determined by means of relevant data such as the meteorological station, light intensity, wind speed, etc. where the new energy field area is located, and setting up an anemometer tower, etc.

[0111] The above load curve is the load curve of the area around the booster station. It should be noted that for a booster station to which at least one wind power generation unit and at least one photovoltaic power generation unit are uniformly connected, if power is supplied to the surrounding area through the booster station, it is necessary to take into account the power supply requirements of the surrounding area. According to different horizontal years, conduct an analysis of the power supply load around the booster station, and conduct research and prediction analysis on the load types, scales, and electricity consumption characteristics, so as to obtain the load curve. If the booster station does not need to supply power to the surrounding area, then take 0.

[0112] The above preset power threshold can be calculated by the following formula:

[0113]

[0114] where P overlimit is the set power threshold, P limit is the upper transmission power limit of the main transformer of the booster station, is the per-unit output value of the i-th photovoltaic power generation unit at time t, is the per-unit output value of the i-th wind power generation unit at time t.

[0115] If in the above formula (that is, the booster station does not need to supply power to the surrounding area), then take as 0. If it does not meet the condition, it remains

[0116] It should be noted that the upper transmission power limit is dynamically adjusted according to the third capacity of the energy storage component.

[0117] In one embodiment, the product of the third capacity and the rated energy storage duration is greater than or equal to a preset power threshold, and the preset power threshold is obtained by the following method:

[0118] Obtain the continuous energy storage duration of the energy storage component;

[0119] Calculate the second differential power, which is the absolute value of the difference between the third sum value and the second sum value. The third sum value is the sum value of the load power and the upper transmission power limit;

[0120] Based on the continuous energy storage duration and the second differential power, calculate the preset power threshold.

[0121] It should be noted that when configuring the capacity of the energy storage component in a power station, the energy storage capacity needs to consider the power generation of at least one wind power generation unit and / or at least one photovoltaic power generation unit. If the power generation is greater than the power demand of the power grid, there is an excess of power generation at this time, and the excess power generation needs to be consumed by the energy storage component to maintain the stability of the system.

[0122] Among them, the product of the third capacity and the rated energy storage duration is greater than or equal to a preset power threshold, which can be expressed by the following formula:

[0123]

[0124] Q overlimit is the preset power threshold, and T i is the rated energy storage duration.

[0125] Furthermore, the above preset power threshold can be calculated by the following formula:

[0126]

[0127] where t' is the continuous energy storage duration.

[0128] It should be noted that if then the preset power threshold is Otherwise, the preset power threshold is 0.

[0129] In one embodiment, the stored power of the energy storage component is greater than the supplied power. The stored power is obtained in the following manner:

[0130] Obtain the first power generation duration of the at least one wind power generation unit and / or the second power generation duration of the at least one photovoltaic power generation unit, as well as the grid charging power and the charging duration corresponding to the grid charging power;

[0131] Based on the wind power and the first power generation duration, calculate the first power; and / or, based on the photovoltaic power and the second power generation duration, calculate the second power;

[0132] Based on the grid charging power and the charging duration, calculate the third power;

[0133] Calculate the stored power, which is the sum of the first power and / or the second power, and the third power;

[0134] The supplied power is obtained in the following manner:

[0135] Obtain the power generation and discharging duration of the energy storage component;

[0136] Based on the power generated during discharging and the discharging duration, the supplied power is calculated.

[0137] It should be noted that in the embodiments of the present invention, the stored power of the energy storage component needs to be greater than the supplied power, so that the power station can continuously perform power dispatching to achieve peak shaving.

[0138] Among them, the stored power of the energy storage component being greater than the supplied power can be expressed by the following formula:

[0139] Q in ≥Q out ,

[0140] Q in is the stored power, and Q out is the supplied power

[0141] The above-mentioned stored power can be expressed by the following formula:

[0142]

[0143] t' S is the second power generation duration, t' W is the first power generation duration, P grid (t) is the grid charging power at time t, and t' grid is the charging duration.

[0144] The above-mentioned supplied power can be expressed by the following formula:

[0145]

[0146] is the power generated and fed into the grid during discharging at time t, and t' g ' rid is the discharging duration.

[0147] In the embodiments of the present invention, as Figure 2 shown, by obtaining the per-unit value output curve of wind power, the per-unit value output curve of photovoltaic power, and the load curve (if required), a calculation model corresponding to the power station is established, and the minimum target net cost is calculated through the calculation model, and then the first capacity of at least one wind power generation unit, the second capacity of at least one photovoltaic power generation unit, and the third capacity of the energy storage component are determined.

[0148] In one embodiment, after the power station is built based on the first capacity, the second capacity, and the third capacity, the method further includes:

[0149] Obtaining the predicted power generation related parameters of the power station, where the predicted power generation related parameters are the parameters for predicting the power generation situation of the power station within a preset time period;

[0150] Send the predicted power generation related parameters to the dispatching center;

[0151] Receive a dispatching plan, where the dispatching plan is a plan for the power station generated by the dispatching center based on a preset power grid dispatching plan and the predicted power generation related parameters;

[0152] Conduct power dispatching based on the dispatching plan.

[0153] The above-mentioned dispatching center is used to conduct power dispatching for different power generation systems to maintain the stability of the power grid. By sending the predicted power generation related parameters from the power station to the dispatching center, it is convenient for the dispatching center to conduct power dispatching for the power station according to the predicted power generation related parameters.

[0154] Specifically, the dispatching center can obtain the peak power curve and the peak shaving (reverse charging) power curve for the next day's 96 points issued the day before by reasonably arranging the startup plan and the spinning reserve capacity and combining the power market clearing situation, and then generate a dispatching plan.

[0155] In an embodiment of the present invention, obtain the predicted power generation related parameters of the power station, where the predicted power generation related parameters are parameters for predicting the power generation situation of the power station within a preset time period; send the predicted power generation related parameters to the dispatching center; receive a dispatching plan, where the dispatching plan is a plan for the power station generated by the dispatching center based on a preset power grid dispatching plan and the predicted power generation related parameters; conduct power dispatching based on the dispatching plan. In this way, by configuring an energy storage component in the power station, the power station can achieve stable power supply; at the same time, by sending the predicted power generation related parameters to the dispatching center and realizing stable power dispatching based on the dispatching plan sent by the dispatching center, the curtailment rate of wind power and photovoltaic power is reduced.

[0156] In one embodiment, after receiving the dispatching plan, the method further includes:

[0157] Receive a real-time dispatching instruction sent by the dispatching center;

[0158] The conducting power dispatching based on the dispatching plan includes:

[0159] Conduct power dispatching based on the dispatching plan and the real-time dispatching instruction.

[0160] In an embodiment of the present invention, after receiving the dispatching plan, receive a real-time dispatching instruction sent by the dispatching center, so as to realize power dispatching based on the dispatching plan and the real-time dispatching instruction, and thus flexible power dispatching can be carried out for the real-time changes of the power grid.

[0161] Specifically, such as Figure 3As shown, it is evaluated by the power station on a daily basis, and the parameters related to predicted power generation are sent to the dispatching center. The dispatching center makes a plan arrangement, generates a dispatching plan, and sends the dispatching plan to the power station. The power station optimizes the power generation strategy according to the dispatching plan. During the day, the dispatching center sends real-time dispatching instructions to the power station according to the real-time situation of the power grid, and the power station conducts power dispatching based on the dispatching plan and the real-time dispatching instructions.

[0162] In some embodiments, the power station can also meet the planned performance as shown in Table 1 below, so as to actively support the safe and reliable power supply of the nearby power grid and realize the establishment of a friendly power station. Among them, for the functions that the power station needs to meet at least for reliable power supply, the establishment of a friendly power station can be realized.

[0163] Table 1

[0164]

[0165]

[0166] Please refer to Figure 4 , Figure 4 which is the structure of a power station provided by an embodiment of the present invention Figure 1 a kind of power station, such as Figure 4 as shown, the power station includes:

[0167] a power generation component, the power generation component includes at least one wind power generation unit 401 and / or at least one photovoltaic power generation unit 402;

[0168] a step-up substation 403, the step-up substation 403 is connected to the power generation component, and the step-up substation 403 is used to access the power grid;

[0169] a energy storage component 404, the energy storage component 404 is connected to the step-up substation 403, and the energy storage component 404 is used to store the redundant power after the power generation component supplies power;

[0170] Among them, the step-up substation 403 is used to obtain the parameters related to the predicted power generation of the power station;

[0171] the step-up substation 403 is used to send the parameters related to the predicted power generation to the dispatching center;

[0172] the step-up substation 403 is used to receive the dispatching plan, and the dispatching plan is the plan of the power station generated by the dispatching center based on the preset power grid dispatching plan and the parameters related to the predicted power generation;

[0173] the step-up substation 403 is used to conduct power dispatching based on the dispatching plan.

[0174] In an embodiment of the present invention, the power station includes a power generation component, a step-up substation 403, and an energy storage component 404. By configuring the energy storage component 404 in the power station, the power station can achieve stable power supply. At the same time, by sending predicted power generation-related parameters to the dispatching center and implementing stable power dispatching based on the dispatching plan sent by the dispatching center, the curtailment rate of wind power and photovoltaic power is reduced.

[0175] Please refer to Figure 5 , Figure 5 which is a structural diagram of a system-friendly power station planning device for safe and reliable power supply of a wind-solar-storage cluster provided by an embodiment of the present invention. The power station includes an energy storage component, a step-up substation, and at least one wind power generation unit and / or at least one photovoltaic power generation unit. The energy storage component is used to dispatch wind power and / or photovoltaic power. As Figure 5 shown, the system-friendly power station planning device 500 for safe and reliable power supply of a wind-solar-storage cluster includes:

[0176] A first calculation module 501, configured to calculate the construction cost and maintenance cost corresponding to the first capacity of the at least one wind power generation unit, and / or the second capacity of the at least one photovoltaic power generation unit, and the third capacity of the energy storage component;

[0177] A second calculation module 502, configured to calculate the power purchase cost and power generation income;

[0178] A third calculation module 503, configured to calculate a target net cost, where the target net cost is the difference between a first sum value and the income, and the first sum value is the sum of the construction cost, the maintenance cost, and the power purchase cost;

[0179] An adjustment module 504, configured to adjust the first capacity, the second capacity, and the third capacity until the corresponding target net cost reaches the minimum value;

[0180] A construction module 505, configured to construct the power station based on the first capacity, the second capacity, and the third capacity.

[0181] In one embodiment, the construction cost is calculated by the following formula:

[0182]

[0183] C cc is the construction cost, is the rated installed capacity of the i-th photovoltaic power generation unit, and the sum of the rated installed capacities of all photovoltaic power generation units is the first capacity, is the unit capacity construction cost of the photovoltaic power generation unit, P wi is the rated installed capacity of the i-th wind power generation unit, and the sum of the rated installed capacities of all wind power generation units is the second capacity, is the construction cost per unit capacity of the wind power generation unit, is the rated installed capacity of the i-th energy storage unit included in the energy storage component, and the sum of the rated installed capacities of all energy storage units is the third capacity, is the construction cost per unit capacity of the i-th energy storage unit, r is the discount rate, and n is the operation time;

[0184] The maintenance cost is calculated by the following formula:

[0185]

[0186] C mc is the maintenance cost, is the annual operation and maintenance cost per unit capacity of the at least one photovoltaic power generation unit, is the annual operation and maintenance cost per unit capacity of the at least one wind power generation unit, C E m i c is the annual operation and maintenance cost per unit capacity of the i-th energy storage unit;

[0187] The power purchase cost is calculated by the following formula:

[0188]

[0189] C buy is the power purchase cost, is the price at which the energy storage component purchases electricity and charges at time t, P grid (t) is the power at which the energy storage component purchases electricity and charges at time t,

[0190] The power generation revenue is calculated by the following formula:

[0191]

[0192] C sell is the power generation revenue, is the grid connection price at time t, is the grid connection power of the i-th photovoltaic power generation unit at time t, is the grid connection power of the i-th wind power generation unit at time t, is the discharging and grid connection power of the i-th energy storage unit at time t.

[0193] In one embodiment, the third capacity is greater than or equal to a preset power threshold, and the preset power threshold is obtained by the following method:

[0194] Obtain the per-unit output curve of the at least one wind power generation unit, and / or the per-unit output curve of the at least one photovoltaic power generation unit, as well as the load curve and the upper transmission power limit of the booster station;

[0195] Based on the third capacity, the per-unit output curve of the wind power, and the per-unit output curve of the photovoltaic power, calculate the wind power and the photovoltaic power;

[0196] Based on the load curve, calculate the load power;

[0197] Calculate the first difference power, where the first difference power is the difference between the second sum value and the load power, and the second sum value is the sum of the wind power and the photovoltaic power;

[0198] Calculate the preset power threshold, where the preset power threshold is the difference between the first difference power and the upper transmission power limit.

[0199] In one embodiment, the product of the third capacity and the rated energy storage duration is greater than or equal to a preset power threshold, and the preset power threshold is obtained through the following method:

[0200] Obtain the continuous energy storage duration of the energy storage component;

[0201] Calculate the second difference power, where the second difference power is the absolute value of the difference between the third sum value and the second sum value, and the third sum value is the sum of the load power and the upper transmission power limit;

[0202] Based on the continuous energy storage duration and the second difference power, calculate the preset power threshold.

[0203] In one embodiment, the stored power of the energy storage component is greater than the supplied power, and the stored power is obtained through the following method:

[0204] Obtain the first power generation duration of the at least one wind power generation unit, and / or the second power generation duration of the at least one photovoltaic power generation unit, as well as the grid charging power and the charging duration corresponding to the grid charging power;

[0205] Based on the wind power and the first power generation duration, calculate the first power; and / or, based on the photovoltaic power and the second power generation duration, calculate the second power;

[0206] Based on the grid charging power and the charging duration, calculate the third power;

[0207] Calculate the stored power, where the stored power is the sum of the first power and / or the second power, and the third power;

[0208] The supplied power is obtained in the following manner:

[0209] Obtain the power fed into the grid during discharging and the discharging duration of the energy storage component;

[0210] Based on the power fed into the grid during discharging and the discharging duration, calculate the supplied power.

[0211] In one embodiment, after the construction module 505, the system-friendly power station planning device 500 for secure and reliable power supply of the wind-solar-storage cluster further includes:

[0212] An acquisition module, configured to acquire the predicted power generation related parameters of the power station, where the predicted power generation related parameters are parameters for predicting the power generation situation of the power station within a preset time period;

[0213] A sending module, configured to send the predicted power generation related parameters to the dispatching center;

[0214] A first receiving module, configured to receive a dispatching plan, where the dispatching plan is a plan of the power station generated by the dispatching center based on a preset grid dispatching plan and the predicted power generation related parameters;

[0215] A dispatching module, configured to perform power dispatching based on the dispatching plan.

[0216] In one embodiment, after the first receiving module, the system-friendly power station planning device 500 for secure and reliable power supply of the wind-solar-storage cluster further includes:

[0217] A second receiving module, configured to receive a real-time dispatching instruction sent by the dispatching center;

[0218] The dispatching module includes:

[0219] A dispatching unit, configured to perform power dispatching based on the dispatching plan and the real-time dispatching instruction.

[0220] The system-friendly power station planning device for secure and reliable power supply of the wind-solar-storage cluster provided by the embodiments of the present invention can implement each process of the above-mentioned system-friendly power station planning method for secure and reliable power supply of the wind-solar-storage cluster. The technical features correspond one by one and can achieve the same technical effects. To avoid repetition, details are not described herein again.

[0221] It should be noted that the system-friendly power station planning device for secure and reliable power supply of the wind-solar-storage cluster in the embodiments of the present invention can be a device, or a component, an integrated circuit, or a chip in an electronic device.

[0222] The embodiments of the present invention also provide an electronic device. Refer to Figure 6 , Figure 6It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. The electronic device includes a memory 601, a processor 602, and a program or instruction running on the memory 601. When the program or instruction is executed by the processor 602, it can implement Figure 1 Any steps in the corresponding method embodiment of the system-friendly power station planning for the secure and reliable power supply of the wind-solar-storage cluster and achieve the same beneficial effects, which will not be elaborated here.

[0223] Among them, the processor 602 can be a CPU, ASIC, FPGA or GPU.

[0224] Those of ordinary skill in the art can understand that all or part of the steps of implementing the method embodiment of the system-friendly power station planning for the secure and reliable power supply of the wind-solar-storage cluster can be completed by hardware related to program instructions, and the said program can be stored in a readable medium.

[0225] The embodiment of the present invention also provides a readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it can implement the above Figure 1 Any steps in the corresponding method embodiment of the system-friendly power station planning for the secure and reliable power supply of the wind-solar-storage cluster and can achieve the same technical effects. To avoid repetition, it will not be elaborated here. The said storage medium, such as a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disc, etc.

[0226] The embodiment of the present invention also provides a computer program product, including computer instructions. When the computer instructions are executed by a processor, they implement the above Figure 1 Any steps in the corresponding method embodiment of the system-friendly power station planning for the secure and reliable power supply of the wind-solar-storage cluster and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0227] The terms "first", "second", etc. in the embodiments of the present invention are used to distinguish similar objects and do not have to be used to describe a specific order or sequence. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices. In addition, in this application, "and / or" is used to represent at least one of the connected objects. For example, A and / or B and / or C represents 7 situations including A alone, B alone, C alone, A and B both present, B and C both present, A and C both present, and A, B and C all present.

[0228] It should be noted that, in this document, the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.

[0229] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions for causing a terminal (which can be a mobile phone, computer, server, air conditioner, or a second terminal device, etc.) to execute the methods of the various embodiments of the present application.

[0230] The embodiments of the present application are described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A method for planning a system-friendly power station for secure and reliable power supply in a wind-solar-storage cluster. The power station includes an energy storage component, a booster station, and at least one wind power generation unit and / or at least one photovoltaic power generation unit. The energy storage component is used for dispatching wind power and / or photovoltaic power. It is characterized in that The method includes: Calculating the construction cost and maintenance cost corresponding to the first capacity of the at least one wind power generation unit, and / or the second capacity of the at least one photovoltaic power generation unit, and the third capacity of the energy storage component; Calculating the electricity purchase cost and power generation revenue; Calculating the target net cost, where the target net cost is the difference between the first sum value and the revenue, and the first sum value is the sum of the construction cost, the maintenance cost and the electricity purchase cost; Adjusting the first capacity, the second capacity and the third capacity until the corresponding target net cost reaches the minimum value; Constructing the power station based on the first capacity, the second capacity and the third capacity.

2. The method according to claim 1, wherein The construction cost is calculated by the following formula: C cc is the construction cost is the rated installed capacity of the i-th photovoltaic power generation unit, and the sum of the rated installed capacities of all photovoltaic power generation units is the first capacity is the construction cost per unit capacity of the photovoltaic power generation unit is the rated installed capacity of the i-th wind power generation unit, and the sum of the rated installed capacities of all wind power generation units is the second capacity is the construction cost per unit capacity of the wind power generation unit is the rated installed capacity of the i-th energy storage unit included in the energy storage component, and the sum of the rated installed capacities of all energy storage units is the third capacity is the construction cost per unit capacity of the i-th energy storage unit, r is the discount rate, and n is the operation time The maintenance cost is calculated by the following formula: C mc is the maintenance cost is the annual operation and maintenance cost per unit capacity of the at least one photovoltaic power generation unit is the annual operation and maintenance cost per unit capacity of the at least one wind power generation unit is the annual operation and maintenance cost per unit capacity of the i-th energy storage unit The electricity purchase cost is calculated by the following formula: C buy is the electricity purchase cost is the price at which the energy storage component purchases and charges electricity at time t, P grid (t) is the power at which the energy storage component purchases and charges electricity at time t The power generation revenue is calculated by the following formula: C sell For the said power generation revenue, is the grid connection price at time t, is the grid connection power of the i-th photovoltaic power generation unit at time t, is the grid connection power of the i-th wind power generation unit at time t, is the discharging grid connection power of the i-th energy storage unit at time t.

3. The method according to claim 2, wherein The third capacity is greater than or equal to a preset power threshold, and the preset power threshold is obtained by the following method: Obtaining the per-unit value output curve of wind power corresponding to the at least one wind power generation unit, and / or the per-unit value output curve of photovoltaic power corresponding to the at least one photovoltaic power generation unit, as well as the load curve and the upper transmission power limit of the booster station; Calculating the wind power and photovoltaic power based on the third capacity, the per-unit value output curve of wind power and the per-unit value output curve of photovoltaic power; Calculating the load power based on the load curve; Calculating the first difference power, where the first difference power is the difference between the second sum value and the load power, and the second sum value is the sum of the wind power and the photovoltaic power; Calculating the preset power threshold, where the preset power threshold is the difference between the first difference power and the upper transmission power limit.

4. The method according to claim 3, wherein The product of the third capacity and the rated energy storage duration is greater than or equal to a preset electricity threshold, and the preset electricity threshold is obtained by the following method: Obtaining the continuous energy storage duration of the energy storage component; Calculating the second difference power, where the second difference power is the absolute value of the difference between the third sum value and the second sum value, and the third sum value is the sum of the load power and the upper transmission power limit; Calculating the preset electricity threshold based on the continuous energy storage duration and the second difference power.

5. The method according to claim 3, characterized in that, The stored electricity of the energy storage component is greater than the supplied electricity, and the stored electricity is obtained by the following method: Obtaining the first power generation duration of the at least one wind power generation unit, and / or the second power generation duration of the at least one photovoltaic power generation unit, as well as the grid charging power and the charging duration corresponding to the grid charging power; Calculating the first electricity amount based on the wind power and the first power generation duration; and / or, calculating the second electricity amount based on the photovoltaic power and the second power generation duration; Calculating the third electricity amount based on the grid charging power and the charging duration; Calculating the stored electricity, where the stored electricity is the sum of the first electricity amount and / or the second electricity amount, and the third electricity amount; The supplied electricity is obtained by the following method: Obtaining the power of the energy storage component discharged to the grid and the discharge duration; The supplied power is calculated based on the discharging power to the grid and the discharging duration.

6. The method according to any one of claims 1 to 5, characterized in that, After building the power station based on the first capacity, the second capacity, and the third capacity, the method further includes: Obtaining prediction power generation related parameters of the power station, where the prediction power generation related parameters are parameters for predicting the power generation situation of the power station within a preset time period; Sending the prediction power generation related parameters to a dispatching center; Receiving a dispatching plan, where the dispatching plan is a plan of the power station generated by the dispatching center based on a preset grid dispatching plan and the prediction power generation related parameters; Performing power dispatching based on the dispatching plan.

7. The method according to claim 6, wherein After receiving the dispatching plan, the method further includes: Receiving a real-time dispatching instruction sent by the dispatching center; The performing power dispatching based on the dispatching plan includes: Performing power dispatching based on the dispatching plan and the real-time dispatching instruction.

8. The method according to any one of claims 1 to 7, characterized in that, The power station must have the function of reliable power supply, and any one of the functions of flexible regulation, friendly to the power grid, and safety emergency. Among them, The reliable power supply includes the confidence capacity function of the electrons; The flexible regulation includes at least one of the system peak shaving function, ramping function, and standby function of the power station; The friendly to the power grid includes at least one of the primary frequency regulation function, automatic generation control function, inertia support function, short-circuit capacity support function, tracking planned curve function, smooth power output function, automatic voltage control function, phase modulation function, voltage adaptability function, and frequency adaptability function; The safety emergency includes at least one of the reliable support function under extreme weather, fast generator tripping function, emergency frequency support, and black start function.

9. An electronic device, characterized in that, It includes a processor, a memory, and a computer program stored on the memory and executable on the processor. When the computer program is executed by the processor, it implements the steps in the method for planning a system-friendly power station for safe and reliable power supply of a wind-solar-storage cluster as described in any one of claims 1 to 7.

10. A computer program product, characterized in that, It includes computer instructions. When the computer instructions are executed by a processor, it implements the steps in the method for planning a system-friendly power station for safe and reliable power supply of a wind-solar-storage cluster as described in any one of claims 1 to 7.

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