CN114583726A - Multi-energy-storage power station wide area coordinated scheduling method of high-permeability new energy power system - Google Patents

Multi-energy-storage power station wide area coordinated scheduling method of high-permeability new energy power system Download PDF

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CN114583726A
CN114583726A CN202210187128.8A CN202210187128A CN114583726A CN 114583726 A CN114583726 A CN 114583726A CN 202210187128 A CN202210187128 A CN 202210187128A CN 114583726 A CN114583726 A CN 114583726A
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杨波
唐飞
袁晓辉
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Abstract

A multi-energy storage power station wide-area coordinated dispatching method of a high-permeability new energy power system comprises the steps of obtaining load of a power system in a target time period of a dispatching operation day, power of a new energy power source and a conventional energy power source, determining total power demand of energy storage power stations in the target time period according to a power system power balance principle, superposing power supply curves of the energy storage power stations in the target time period to obtain a total power supply curve of the energy storage power stations, taking the total power supply of the energy storage power stations equal to the total power demand as a supply and demand balance point to obtain charge and discharge balance price and balance amount, determining a power supply plan of the energy storage power stations according to the charge and discharge balance price and the power supply curves of the energy storage power stations, and finally performing safety check on the supply plan, taking the supply plan as a final dispatching scheme if the supply plan passes, and adjusting the energy storage power stations and distributed power supply amount if the supply plan passes the final dispatching scheme, until the check is passed. The design realizes reasonable and effective scheduling of wide-area multi-energy-storage power stations in the high-permeability new energy power system.

Description

Multi-energy-storage power station wide area coordinated scheduling method of high-permeability new energy power system
Technical Field
The invention belongs to the technical field of power grid optimized dispatching, and particularly relates to a multi-energy storage power station wide area coordinated dispatching method of a high-permeability new energy power system.
Background
In order to realize the aim of low carbon of the power system, a clean, low-carbon, safe and efficient energy system must be constructed, renewable energy source substitution actions are implemented, and a novel power system mainly comprising new energy sources is constructed. The characteristics and the development trend of the power system are shown in the following steps: firstly, new energy such as wind power generation, solar power generation and the like is accessed into a power grid in a large scale, the power occupation ratio of new energy power sources in a power system is continuously increased, the power system is gradually evolved into a high-permeability new energy power system, and the randomness and the fluctuation of the wind power generation and the solar power generation make the power balance between the power generation and the load of the power system very difficult; and secondly, the electrochemical energy storage power station, the electric vehicle charging pile and various adjustable resources on the load side participate in the operation adjustment of the power grid, the scheduling mode of the power system is changed from source follow-up load movement to source grid load storage interaction, the energy storage power station has the advantages of strong load tracking capability, high response speed, accurate control, bidirectional charging and discharging adjustment and the like, the energy storage power station becomes important energy storage equipment of a high-permeability new energy power system, the optimal scheduling of the energy storage power station is beneficial to realizing the balance of power generation and load of the power system, the randomness and the fluctuation of wind power and solar power generation are stabilized, and the wind power and solar power generation absorption capability of the power system is improved.
In the aspect of power system energy storage power station scheduling research, documents are as follows: considering loss cost, modeling and optimizing scheduling of a battery energy storage power station, Zhang Xin Song and the like, a power grid technology, volume 41, phase 5, page 1541 and 1547, and considering energy storage power station investment cost and charging and discharging loss cost 5 months and 5 days in 2017, and an energy storage power station unit combination model and an optimizing scheduling method with minimum operation cost and maximum wind power acceptance are provided; the invention discloses a scheduling method, a device, equipment and a system based on an energy storage power station, wherein the Chinese patent has an application publication number of CN113746118A and an application publication date of 2021, 12 months and 3 days; the invention discloses an energy scheduling method and device for a distributed energy storage power station, which is disclosed by the Chinese patent with the application publication number of CN113902281A and the application publication date of 2022, 1 month and 7 days; the research aims at increasing the wind power consumption of the power system to carry out energy storage power station optimized dispatching or carries out self dispatching of the energy storage power station from the aspects of controlling the charging and discharging working process and strengthening block chain trust. However, there are a plurality of energy storage power stations in the high permeability new forms of energy electric power system, and the geographical region distributes extensively, and belongs to different market subjects, and energy storage power station subject diverse, the physical characteristic (such as power regulation rate, charge-discharge power curve etc.) and the economic characteristic (such as operation cost etc.) of energy storage power station are also different, hardly acquire above-mentioned information comprehensively, and simultaneously, there is coupling influence in a plurality of energy storage power stations to electric power system power balance. Therefore, the method based on the above documents cannot effectively solve the scheduling problem of multiple energy storage power stations in the high-permeability new energy power system.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a multi-energy-storage power station wide-area coordinated scheduling method for a high-permeability new energy power system.
In order to realize the purpose, the invention provides the following technical scheme:
the multi-energy storage power station wide area coordinated dispatching method of the high-permeability new energy power system sequentially comprises the following steps of:
step A, screening out energy storage power stations meeting the dispatching response requirement based on the operation parameters of the energy storage power stations in the power system;
b, firstly, acquiring a load value, wind power, solar power generation power and conventional energy power generation power of the power system at a target time period of a scheduled operation day, and then calculating to obtain the total power demand of the energy storage power station of the power system at the target time period of the scheduled operation day according to a power balance principle of the power system;
step C, acquiring power supply curves of all energy storage power stations meeting the dispatching response requirement in the dispatching operation day target time period, and then superposing the power supply curves to obtain a total power supply curve of the energy storage power stations;
step D, aiming at meeting the total power demand of the energy storage power station of the power system in the target time period of the dispatching operation day, taking the total power supply quantity of the energy storage power station equal to the total power demand as a supply and demand balance point, and obtaining a charge and discharge balance price and balance quantity;
step E, determining energy storage power stations for charging and discharging and distributed power supply amount thereof during balanced supply and demand, namely power supply plans of the energy storage power stations, according to the charge and discharge balanced price and the power supply curves of the energy storage power stations meeting the dispatching response requirements;
and F, performing safety check on the power supply plan of the energy storage power station, if the safety check condition is met, using the power supply plan as a multi-energy storage power station wide area coordination scheduling scheme, otherwise, adjusting the energy storage power station for charging and discharging and the distributed power supply amount until the safety check condition is met.
When the power system is in a load valley or waist load period, the step C sequentially comprises the following steps:
c1, acquiring a charging power supply curve of each energy storage power station meeting the dispatching response requirement in the target time period of the dispatching operation day:
Mi，ch，t＝Mi，ch，t(Pich，t)
Figure BDA0003524014700000031
in the above formula, Mi，ch，t(Pich，t) Charging power supply curve for scheduling the target time t (i) th energy storage power station of the operating day, Mi，ch，tFor scheduling the charging price, P, of the i-th energy storage station for the target time period t of the operating dayich，tThe charging power supply amount of the ith energy storage power station is the target time t of the scheduled operation day;
c2 price M given based on ith energy storage power stationch，tCalculating the charging power of the time-of-day to obtain the given price M of the energy storage power station of the power systemch，tTotal charging power in hour:
Figure BDA0003524014700000032
Figure BDA0003524014700000033
in the above formula, Ps，ch，tAt a given price M for a power system energy storage plantch，tTotal power charged per hour, Pich，tAt a given price M for the ith energy storage plantch，tThe charging power is normal, and N is the number of energy storage power stations;
c3, determining a charging total power supply curve of the power system energy storage power station:
Mch，t＝Mch，t(Ps，ch，t)
in the above formula, Mch，t(Ps，ch，t) A charging total power supply curve of the power system energy storage power station for a target time t of a scheduling operation day;
when the power system is in the peak load period, the step C comprises the following steps in sequence:
s1, obtaining a discharge power supply curve of each energy storage power station meeting the dispatching response requirement in the target time period of the dispatching operation day:
Mi，dis，t＝Mi，dis，t(Pidis，t)
Figure BDA0003524014700000041
in the above formula, Mi，dis，t(Pidis，t) For scheduling the discharge power supply curve of the ith energy storage power station for the target time t of the operating day, Mi，dis，tRespectively the discharge price, P, of the ith energy storage power station in the target time period t of the dispatching operation dayidis，tThe discharge power supply quantity of the ith energy storage power station in the target time t of the scheduled operation day;
s2, setting M price based on ith energy storage power stationdis，tCalculating the discharge power of the time to the given price M of the energy storage power station of the power systemdis，tTotal power of discharge in time:
Figure BDA0003524014700000042
Figure BDA0003524014700000043
in the above formula, Ps，dis，tAt a given price M for a power system energy storage plantdis，tTotal power of discharge in time, Pidis，tAt a given price M for the ith energy storage plantdis，tThe discharge power of the time, N is the number of energy storage power stations;
s3, determining a total discharge power supply curve of the energy storage power station of the power system:
Mdis，t＝Mdis，t(Ps，dis，t)
in the above formula, Mdis，t(Ps，dis，t) And (4) a total discharge power supply curve of the power system energy storage power station for the target time t of the scheduled operation day.
In the step D, when the power system is in a low load valley or a waist load period, the balance price and the balance weight are calculated according to the following formula:
Figure BDA0003524014700000051
in the above formula, the first and second carbon atoms are,
Figure BDA0003524014700000052
respectively charge balance price and balance, Pd，ch，tTotal power demand, M, for charging energy storage power stations of a power system at a target time t in a scheduled operating daych，t(Ps，ch，t) Charging total power supply curve P of power system energy storage power station for scheduling operation day target time ts，chtThe total charging power of the energy storage power station of the power system is the target time t of the scheduling operation day;
when the power system is in a load peak period, the balance price and the balance amount are calculated according to the following formulas:
Figure BDA0003524014700000053
in the above formula, the first and second carbon atoms are,
Figure BDA0003524014700000054
respectively discharge balance price and balance amount, Pd，dis，tScheduling the total power demand, M, of the discharge of the energy-storing power station of the electric power system during the target time t of the operating daydis，t(Ps，dis，t) Total power supply curve for the discharge of a power system energy storage plant for a scheduled operating day target period ts，dis，tAnd the total discharge power of the energy storage power station of the power system is the target time t of the scheduling operation day.
In the step E, when the power system is in a load valley or a waist load period, the power supply amount distributed by each energy storage power station is calculated by the following formula:
Figure BDA0003524014700000055
in the above formula, the first and second carbon atoms are,
Figure BDA0003524014700000056
the distributed charging power supply amount of the ith energy storage power station for the target time period tth of the scheduled operation day,
Figure BDA0003524014700000061
for the charging power supply quantity corresponding to the charging balance price on the charging power supply curve of the ith energy storage power station in the target time interval t of the scheduling operation day,
Figure BDA0003524014700000062
charging power supply curve M of ith energy storage power station for scheduling target time period tth of operation dayi，ch，t(Pich，t) The inverse function of (d);
when the power system is in the load peak period, the power supply amount distributed by each energy storage power station is calculated by the following formula:
Figure BDA0003524014700000063
in the above formula, the first and second carbon atoms are,
Figure BDA0003524014700000064
the distributed discharging power supply value of the ith energy storage power station for the target time t of the scheduled operation day,
Figure BDA0003524014700000065
for the discharge power supply quantity corresponding to the discharge balance price on the discharge power supply curve of the ith energy storage power station in the target time interval tth of the scheduled operation day,
Figure BDA0003524014700000066
discharging power supply curve M of ith energy storage power station for scheduling target time t of operation dayi，dis，t(Pidis，t) Is the inverse function of (c).
In step F, the security check condition includes:
and power balance constraint:
Figure BDA0003524014700000067
in the above formula, PL，t、Pw，t、Pv，t、Pg，tThe load value of the power system, the power of the wind power supply, the power of the solar power generation supply and the power of the conventional energy power generation supply are P of a target time interval t of a scheduled operation dayich，t、Pidis，tThe charge and discharge power supply quantities of the ith energy storage power station in the target time t of the scheduled operation day are respectively, and N is the number of the energy storage power stations;
energy storage power station regulation capacity constraint:
Figure BDA0003524014700000071
in the above formula, Qi，maxThe maximum adjustable capacity of the ith energy storage power station;
node voltage constraint:
Vj，min≤|Vj|≤Vj，max
Vj＝|Vj|∠θj
θjk＝θj-θk
Figure BDA0003524014700000072
Figure BDA0003524014700000073
in the above formula, Vj，max、Vj，minMaximum and minimum voltage amplitude respectively allowed by the jth node in the power systemjIs the voltage of the jth node, | Vj|、θjAmplitude and phase of voltage at jth node, θjkIs the voltage phase difference between the jth node and the kth node, thetakIs the voltage phase of the kth node, Pj、QjRespectively the active power and the reactive power of the jth node, | VkI is the voltage amplitude of the kth node, Gjk、BjkThe real part and the imaginary part of a complex admittance of a jth node and a kth node are respectively, j, k is 1, 2,.
Branch flow constraint:
Fjk，min≤Fjk≤Fjk，max
Fjk＝Re(Sjk)
Figure BDA0003524014700000081
in the above formula, FjkActive power flow for the branch jk from the jth node to the kth node, Fjk，max、Fjk，minMaximum and minimum power flow transmission values, R, respectively allowed for branch jke() To obtain a function of the real part of the complex number, SjkFor the complex power of the branch jk,Vj *、
Figure BDA0003524014700000082
the conjugate values of the voltage of the j-th node and the k-th node respectively,
Figure BDA0003524014700000083
Figure BDA0003524014700000084
the equivalent admittance conjugate values of the branch jk to ground and the line are respectively.
In the step B, the total power requirement of the energy storage power station of the power system is determined by the following formula:
Figure BDA0003524014700000085
in the above formula, Pd，ch，t、Pd，dis，tRespectively the total power requirements of charging and discharging of the energy storage power station of the power system at the target time t of the dispatching operation day, PL，t、Pw，t、Pv，t、Pg，tThe method comprises the steps of dispatching the load value of a power system, the power of a wind power supply, the power of a solar power generation supply and the power of a conventional energy power generation supply in a target time period t of a running day.
In step a, the condition that the scheduling response requirement is satisfied is that the following inequalities are all true:
Pi，max≥Pi，max，req
ΔPi，max≥ΔPi，max，req
Qi，max≥Qi，max，req
in the above formula, Pi，max、ΔPi，max、Qi，maxRespectively the maximum adjustable power, the maximum adjustable power rate and the maximum adjustable capacity of the ith energy storage power station, Pi，max，req、ΔPi，max，req、Qi，max，reqThe maximum adjustable power and the maximum adjustable power speed of the power system dispatching mechanism for single adjustment of the ith energy storage power station are respectivelyRate, maximum adjustable capacity lower limit requirements.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to a multi-energy storage power station wide-area coordinated dispatching method of a high-permeability new energy power system, which comprises the steps of firstly screening out energy storage power stations meeting the dispatching response requirement based on the operation parameters of the energy storage power stations in the power system, obtaining the load value, the wind power supply power, the solar power generation power and the conventional energy power generation power of the power system in the target time period of the dispatching operation day, then calculating the total power demand of the energy storage power stations of the power system in the target time period of the dispatching operation day according to the power balance principle of the power system, then obtaining the power supply curves of the energy storage power stations meeting the dispatching response requirement in the target time period of the dispatching operation day, superposing the power supply curves to obtain the total power supply curve of the energy storage power stations, and then taking the total power demand of the energy storage power stations in the target time period of the dispatching operation day as the target, and taking the total power demand equal to the energy storage power demand as the supply balance point, obtaining charge-discharge balance price and balance amount, then determining energy storage power stations providing charge and discharge and distributed power supply amount thereof when supply and demand are balanced according to the charge-discharge balance price and power supply curves of the energy storage power stations meeting the dispatching response requirement, namely power supply plans of the energy storage power stations, finally performing safety check on the power supply plans of the energy storage power stations, if the safety check conditions are met, taking the energy storage power stations as a multi-energy storage power station wide-area coordination dispatching scheme, otherwise, adjusting the energy storage power stations providing charge and discharge and the distributed power supply amount thereof until the safety check conditions are met, constructing a total power supply curve of the energy storage power stations on the basis of the power supply curves of the energy storage power stations, determining the functional relation between the price and the power supply amount of the energy storage power stations providing charge-discharge service, and obtaining the energy storage power stations providing charge-discharge service and the power supply amount thereof by using the total power supply of the energy storage power stations equal to the total power demand balance point, and finally, the power supply plan of the energy storage power stations meeting the safety check condition is used as a wide area coordination scheduling result of the multiple energy storage power stations, the reasonable arrangement of the active power charging and discharging processes of the multiple energy storage power stations can be realized without acquiring information such as the operation cost of each energy storage power station, the balance of power generation and load of the power system is ensured, the randomness and the fluctuation of the wind power generation and the solar power generation are further stabilized, the wind power and solar power generation absorption capacity of the power system is increased, and the stable operation of the high-permeability new energy power system is promoted. Therefore, the method and the device realize reasonable and effective scheduling of the wide-area multi-energy-storage power station in the high-permeability new energy power system.
Drawings
FIG. 1 is a flow chart of the present invention.
Fig. 2 is a schematic structural diagram of the high-permeability new energy power system according to embodiment 1.
Fig. 3 is a power supply curve diagram of the energy storage power station in embodiment 1.
Detailed Description
The present invention will be further described with reference to the following detailed description and accompanying drawings.
According to the invention, the characteristics that the plurality of energy storage power stations are wide in geographical range distribution and belong to different market subjects are followed, each energy storage power station independently provides a power supply curve for dispatching the target time period of the operation day, and the initiative that each energy storage power station collaborates to participate in power generation and load balance of the new energy power system is effectively exerted, so that the problem of optimizing dispatching of the plurality of energy storage power stations in the high-permeability new energy power system is solved.
Example 1:
referring to fig. 1, the method for multi-energy storage power station wide area coordinated scheduling of a high permeability new energy power system takes the high permeability new energy power system shown in fig. 2 as an object, and the system includes N energy storage power stations, a wind power supply, a solar power generation supply, a water and fire and other conventional energy power generation supplies. The N energy storage power stations are respectively an energy storage power station 1, an energy storage power station 2, an energy storage power station … and an energy storage power station N, each energy storage power station is connected to a power system through a corresponding transformer, all the energy storage power stations have two operation modes of charging and discharging, and the charging and discharging power of the energy storage power stations are respectively Pich，t、Pidis，tThe power injection of the wind power supply, the solar power generation supply and the conventional energy power generation supply into the power system is respectively represented by Pw，t、Pv，t、Pg，tIndicating that the load of the new energy power system is PL，tIndicating that it is drawing power from the power system. The method is sequentially carried out according to the following steps:
1. screening out energy storage power stations meeting the dispatching response requirement based on the operation parameters of the energy storage power stations in the power system, wherein the condition of meeting the dispatching response requirement is that the following inequalities are all satisfied:
Pi，max≥Pi，max，req
ΔPi，max≥ΔPi，max，req
Qi，max≥Qi，max，req
in the above formula, Pi，max、ΔPi，max、Qi，maxRespectively the maximum adjustable power, the maximum adjustable power rate and the maximum adjustable capacity of the ith energy storage power station, Pi，max，req、ΔPi，max，req、Qi，max，reqRespectively meeting the lower limit requirements of the power system dispatching mechanism on the maximum adjustable power, the maximum adjustable power rate and the maximum adjustable capacity of the ith energy storage power station in a single adjustment mode;
2. the method comprises the steps that a load value, wind power, solar power generation power and conventional energy power generation power of a power system in a target time period of a dispatching operation day are obtained, wherein the load value is obtained through prediction of a load prediction system, the wind power and the solar power generation power are obtained through prediction of a new energy power generation power prediction system, and the conventional energy power generation power is determined by a dispatching plan;
3. calculating the total power demand of the energy storage power station of the power system in the target time period of the dispatching operation day according to the power balance principle of the power system:
Figure BDA0003524014700000111
in the above formula, Pd，ch，t、Pd，dis，tRespectively meets the total power requirements of charging and discharging of the energy storage power station of the power system in a target time t of a dispatching operation day,PL，t、Pw，t、Pv，t、Pg，trespectively scheduling the load value of the power system, the power of the wind power supply, the power of the solar power generation supply and the power of the conventional energy power generation supply in the target time period t of the operating day;
4. acquiring a power supply curve M of each energy storage power station meeting the dispatching response requirement in the target time period of the dispatching operation dayi，t(Pi，t) The curve representing the functional relationship between the price and the supply of the charging or discharging service provided by the i-th energy storage plant (see fig. 3), wherein the ordinate Mi，tRepresenting the price at which the ith energy storage plant provides charging or discharging services, as determined by the market trading price, abscissa Pi，tThe charging power supply curve of each energy storage power station which represents the supply amount of charging or discharging service provided by the ith energy storage power station and meets the scheduling response requirement in the target time period of the scheduling operation day when the power system is in the load valley or waist load time period is as follows:
Mi，ch，t＝Mi，ch，t(Pich，t)
Figure BDA0003524014700000121
in the above formula, Mi，ch，t(Pich，t) Charging power supply curve for scheduling the target time t (i) th energy storage power station of the operating day, Mi，ch，tFor scheduling the charging price, P, of the i-th energy storage station for the target time period t of the operating dayich，tThe charging power supply amount of the ith energy storage power station is the target time t of the scheduled operation day;
when the power system is in the load peak period, the discharging power supply curve of each energy storage power station meeting the dispatching response requirement in the dispatching operation day target period is as follows:
Mi，dis，t＝Mi，dis，t(Pidis，t)
Figure BDA0003524014700000122
in the above formula, Mi，dis，t(Pidis，t) For scheduling the discharge power supply curve of the ith energy storage power station for the target time t of the operating day, Mi，dis，tRespectively the discharge price, P, of the ith energy storage power station in the target time interval tth of the scheduled operation dayidis，tThe discharge power supply quantity of the ith energy storage power station in the target time t of the scheduled operation day;
5. when the power system is in a load valley or waist load period, firstly setting a given price M based on the ith energy storage power stationch，tCalculating the charging power of the time-of-day to obtain the given price M of the energy storage power station of the power systemch，tThen determining the charging total power supply curve of the power system energy storage power station:
Mch，t＝Mch，t(Ps，ch，t)
Figure BDA0003524014700000123
Figure BDA0003524014700000124
in the above formula, Mch，t(Ps，ch，t) Charging total power supply curve P of power system energy storage power station for scheduling operation day target time ts，ch，tAt a given price M for a power system energy storage plantch，tTotal power charged per hour, Pich，tAt a given price M for the ith energy storage plantch，tThe charging power is normal, and N is the number of energy storage power stations;
when the power system is in the load peak period, firstly based on the ith energy storage power station at a given price Mdis，tCalculating the discharge power of the time to the given price M of the energy storage power station of the power systemdis，tThen determining the total discharge power supply curve of the energy storage power station of the power system:
Mdis，t＝Mdis，t(Ps，dis，t)
Figure BDA0003524014700000131
Figure BDA0003524014700000132
in the above formula, Mdis，t(Ps，dis，t) Total power supply curve for the discharge of a power system energy storage plant for a scheduled operating day target period ts，dis，tAt a given price M for a power system energy storage plantdis，tTotal power of discharge in time, Pidis，tAt a given price M for the ith energy storage plantdis，tThe discharge power of the time, N is the number of energy storage power stations;
6. the method comprises the following steps of taking the total power demand of an energy storage power station of a power system in a target time period of a scheduling operation day as a target, taking the total power supply quantity of the energy storage power station equal to the total power demand as a supply and demand balance point, and calculating to obtain a charge and discharge balance price and balance quantity based on the following method:
when the power system is in a load trough or waist load period,
Figure BDA0003524014700000141
in the above formula, the first and second carbon atoms are,
Figure BDA0003524014700000142
respectively charge balance price and balance, Pd，ch，tTotal power demand, M, for charging energy storage power stations of a power system at a target time t on a scheduled operating daych，t(Ps，ch，t) Charging total power supply curve P of power system energy storage power station for scheduling operation day target time ts，ch，tThe total charging power of the energy storage power station of the power system is the target time t of the scheduling operation day;
when the power system is in a peak load period,
Figure BDA0003524014700000143
in the above formula, the first and second carbon atoms are,
Figure BDA0003524014700000144
respectively discharge balance price and balance amount, Pd，dis，tScheduling the total power demand, M, of the discharge of the energy-storing power station of the electric power system during the target time t of the operating daydis，t(Ps，dis，t) Total power supply curve for the discharge of a power system energy storage plant for a scheduled operating day target period ts，dis，tThe total discharge power of the energy storage power station of the power system in the target time t of the scheduled operation day;
7. determining an energy storage power station for providing charge and discharge during balanced supply and demand and the distributed power supply quantity thereof according to the following formula, namely a power supply plan of the energy storage power station:
when the power system is in a load trough or waist load period,
Figure BDA0003524014700000145
in the above formula, the first and second carbon atoms are,
Figure BDA0003524014700000146
the distributed charging power supply amount of the ith energy storage power station for the target time period tth of the scheduled operation day,
Figure BDA0003524014700000147
for the charging power supply quantity corresponding to the charging balance price on the charging power supply curve of the ith energy storage power station in the target time interval t of the scheduling operation day,
Figure BDA0003524014700000151
charging power supply curve M of ith energy storage power station for scheduling target time period tth of operation dayi，ch，t(Pich，t) The inverse function of (d);
when the power system is in a peak load period,
Figure BDA0003524014700000152
in the above formula, the first and second carbon atoms are,
Figure BDA0003524014700000153
the distributed discharging power supply value of the ith energy storage power station for the target time t of the scheduled operation day,
Figure BDA0003524014700000154
for the discharging power supply quantity corresponding to the discharging balance price on the discharging power supply curve of the ith energy storage power station in the target time t of the dispatching operation day,
Figure BDA0003524014700000155
discharging power supply curve M of ith energy storage power station for scheduling target time t of operation dayi，dis，t(Pidis，t) The inverse function of (d);
8. and performing safety check on the power supply plan of the energy storage power station, if the safety check condition is met, taking the power supply plan as a multi-energy storage power station wide area coordination scheduling scheme, otherwise, adjusting the energy storage power stations for charging and discharging and the distributed power supply amount until the safety check condition is met, wherein the safety check condition comprises the following steps:
and power balance constraint:
Figure BDA0003524014700000156
in the above formula, PL，t、Pw，t、Pv，t、Pg，tRespectively the load value of the power system, the power of the wind power supply, the power of the solar power generation supply, the power of the conventional energy power generation supply, Pich，t、Pidis，tRespectively the charge and discharge power supply quantity of the ith energy storage power station in the target time t of the scheduled operation day, wherein N is the number of the energy storage power stations;
energy storage power station regulation capacity constraint:
Figure BDA0003524014700000161
in the above formula, Qi，maxThe maximum adjustable capacity of the ith energy storage power station;
node voltage constraint:
Vj，min≤|Vj|≤Vj，max
Vj＝|Vj|∠θj
θjk＝θj-θk
Figure BDA0003524014700000162
Figure BDA0003524014700000163
in the above formula, Vj，max、Vj，minMaximum and minimum voltage amplitude respectively allowed by the jth node in the power systemjIs the voltage of the jth node, | Vj|、θjThe amplitude and phase of the voltage at the jth node, θjkIs the voltage phase difference between the jth node and the kth node, thetakIs the voltage phase of the kth node, Pj、QjRespectively the active power and the reactive power of the jth node, | VkI is the voltage amplitude of the kth node, Gjk、BjkThe real part and the imaginary part of a complex admittance of a jth node and a kth node are respectively, j, k is 1, 2,.
Branch flow constraint:
Fjk，min≤Fjk≤Fjk，max
Fjk＝Re(Sjk)
Figure BDA0003524014700000174
in the above formula, FjkActive power flow for the branch jk from the jth node to the kth node, Fjk，max、Fjk，minMaximum and minimum power flow transmission values, R, respectively allowed for branch jke() To obtain a function of the real part of the complex number, SjkComplex power of branch jk, Vj *、
Figure BDA0003524014700000171
The conjugate values of the voltage of the j-th node and the k-th node respectively,
Figure BDA0003524014700000172
Figure BDA0003524014700000173
the equivalent admittance conjugate values of the branch jk to ground and the line are respectively.

Claims (7)

1. The multi-energy storage power station wide area coordinated scheduling method of the high-permeability new energy power system is characterized by comprising the following steps of:
the scheduling method sequentially comprises the following steps:
step A, screening out energy storage power stations meeting the dispatching response requirement based on the operation parameters of the energy storage power stations in the power system;
b, firstly, acquiring a load value, wind power, solar power generation power and conventional energy power generation power of the power system at a target time period of a scheduled operation day, and then calculating to obtain the total power demand of the energy storage power station of the power system at the target time period of the scheduled operation day according to a power balance principle of the power system;
step C, acquiring power supply curves of all energy storage power stations meeting the dispatching response requirement in the dispatching operation day target time period, and then superposing the power supply curves to obtain a total power supply curve of the energy storage power stations;
step D, aiming at meeting the total power demand of the energy storage power station of the power system in the target time period of the dispatching operation day, taking the total power supply quantity of the energy storage power station equal to the total power demand as a supply and demand balance point, and obtaining a charge and discharge balance price and balance quantity;
step E, determining energy storage power stations for charging and discharging and distributed power supply amount thereof during balanced supply and demand, namely power supply plans of the energy storage power stations, according to the charge and discharge balanced price and the power supply curves of the energy storage power stations meeting the dispatching response requirements;
and F, performing safety check on the power supply plan of the energy storage power station, if the safety check condition is met, using the power supply plan as a multi-energy storage power station wide area coordination scheduling scheme, otherwise, adjusting the energy storage power station for charging and discharging and the distributed power supply amount until the safety check condition is met.
2. The multi-energy-storage-power-station wide-area coordinated scheduling method of the high-permeability new-energy power system according to claim 1, characterized in that:
when the power system is in a load valley or waist load period, the step C sequentially comprises the following steps:
c1, acquiring a charging power supply curve of each energy storage power station meeting the dispatching response requirement in the target time period of the dispatching operation day:
Mi，ch，t＝Mi，ch，t(Pich，t)
Figure FDA0003524014690000011
in the above formula, Mi，ch，t(Pich，t) Charging power supply curve for scheduling the target time t (i) th energy storage power station of the operating day, Mi，ch，tFor scheduling the charging price, P, of the ith energy storage power station at the target time interval tth of the operating dayich，tThe charging power supply amount of the ith energy storage power station is the target time t of the scheduled operation day;
c2 price M given based on ith energy storage power stationch，tCalculating the charging power of the time-of-day to obtain the given price M of the energy storage power station of the power systemch，tTotal charging power in hour:
Figure FDA0003524014690000021
Figure FDA0003524014690000022
in the above formula, Ps，ch，tAt a given price M for a power system energy storage plantch，tTotal power charged per hour, Pich，tAt a given price M for the ith energy storage plantch，tThe charging power is normal, and N is the number of energy storage power stations;
c3, determining a charging total power supply curve of the power system energy storage power station:
Mch，t＝Mch，t(Ps，ch，t)
in the above formula, Mch，t(Ps，ch，t) A charging total power supply curve of the power system energy storage power station for a target time t of a scheduling operation day;
when the power system is in the peak load period, the step C comprises the following steps in sequence:
s1, obtaining a discharge power supply curve of each energy storage power station meeting the dispatching response requirement in the target time period of the dispatching operation day:
Mi，dis，t＝Mi，dis，t(Pidis，t)
Figure FDA0003524014690000031
in the above formula, Mi，dis，t(Pidis，t) For scheduling the discharge power supply curve of the ith energy storage power station for the target time t of the operating day, Mi，dis，tRespectively the discharge price, P, of the ith energy storage power station in the target time period t of the dispatching operation dayidis，tThe discharge power supply quantity of the ith energy storage power station in the target time t of the scheduled operation day;
s2, setting price M based on ith energy storage power stationdis，tTemporal discharge power calculation power system energy storage power station supplyFixed price Mdis，tTotal power of discharge in time:
Figure FDA0003524014690000032
Figure FDA0003524014690000033
in the above formula, Ps，dis，tAt a given price M for a power system energy storage plantdis，tTotal power of discharge in time, Pidis，tAt a given price M for the ith energy storage plantdis，tThe discharge power of the time, N is the number of energy storage power stations;
s3, determining a total discharge power supply curve of the energy storage power station of the power system:
Mdis，t＝Mdis，t(Ps，dis，t)
in the above formula, Mdis，t(Ps，dis，t) And (4) a total discharge power supply curve of the power system energy storage power station for the target time t of the scheduled operation day.
3. The multi-energy-storage-power-station wide-area coordinated scheduling method of the high-permeability new-energy power system according to claim 1 or 2, characterized by comprising the following steps:
in the step D, when the power system is in a low load valley or a waist load period, the balance price and the balance weight are calculated according to the following formula:
Figure FDA0003524014690000041
in the above formula, the first and second carbon atoms are,
Figure FDA0003524014690000042
respectively charge balance price and balance, Pd，ch，tIn order to schedule the total charging power demand of the energy storage power station of the power system in the target time t of the operating day,Mch，t(Ps，ch，t) Charging total power supply curve P of power system energy storage power station for scheduling operation day target time ts，ch，tThe total charging power of the energy storage power station of the power system is the target time t of the scheduling operation day;
when the power system is in a load peak period, the balance price and the balance amount are calculated according to the following formulas:
Figure FDA0003524014690000043
in the above formula, the first and second carbon atoms are,
Figure FDA0003524014690000044
respectively discharge balance price and balance amount, Pd，dis，tScheduling the total power demand, M, of the discharge of the energy-storing power station of the electric power system during the target time t of the operating daydis，t(Ps，dis，t) Total power supply curve for the discharge of a power system energy storage plant for a scheduled operating day target period ts，dis，tAnd the total discharge power of the energy storage power station of the power system is the target time t of the scheduling operation day.
4. The multi-energy-storage-power-station wide-area coordinated scheduling method of the high-permeability new-energy power system according to claim 2, characterized in that:
in the step E, when the power system is in a load valley or a waist load period, the power supply amount distributed by each energy storage power station is calculated by the following formula:
Figure FDA0003524014690000045
in the above formula, the first and second carbon atoms are,
Figure FDA0003524014690000046
the distributed charging power supply amount of the ith energy storage power station for the target time period tth of the scheduled operation day,
Figure FDA0003524014690000047
for the charging power supply quantity corresponding to the charging balance price on the charging power supply curve of the ith energy storage power station in the target time interval t of the scheduling operation day,
Figure FDA0003524014690000051
charging power supply curve M of ith energy storage power station for scheduling target time period tth of operation dayi，ch，t(Pich，t) The inverse function of (d);
when the power system is in the peak load period, the power supply amount distributed by each energy storage power station is calculated by the following formula:
Figure FDA0003524014690000052
in the above formula, the first and second carbon atoms are,
Figure FDA0003524014690000053
the distributed discharging power supply value of the ith energy storage power station for the target time t of the scheduled operation day,
Figure FDA0003524014690000054
for the discharging power supply quantity corresponding to the discharging balance price on the discharging power supply curve of the ith energy storage power station in the target time t of the dispatching operation day,
Figure FDA0003524014690000055
discharging power supply curve M of ith energy storage power station for scheduling target time t of operation dayi，dis，t(Pidis，t) Is the inverse function of (c).
5. The multi-energy-storage-power-station wide-area coordinated scheduling method of the high-permeability new-energy power system according to claim 1 or 2, characterized by comprising the following steps:
in step F, the security check condition includes:
and power balance constraint:
Figure FDA0003524014690000056
in the above formula, PL，t、Pw，t、Pv，t、Pg，tRespectively the load value of the power system, the power of the wind power supply, the power of the solar power generation supply, the power of the conventional energy power generation supply, Pich，t、Pidis，tRespectively the charge and discharge power supply quantity of the ith energy storage power station in the target time t of the scheduled operation day, wherein N is the number of the energy storage power stations;
energy storage power station regulation capacity constraint:
Figure FDA0003524014690000061
in the above formula, Qi，maxThe maximum adjustable capacity of the ith energy storage power station;
node voltage constraint:
Vj，min≤|Vj|≤Vj，max
Vj＝|Vj|∠θj
θjk＝θj-θk
Figure FDA0003524014690000062
Figure FDA0003524014690000063
in the above formula, Vj，max、Vj，minMaximum and minimum voltage amplitude respectively allowed by the jth node in the power systemjIs the voltage of the jth node, | Vj|、θjRespectively the voltage of the j nodeAmplitude and phase, θjkIs the voltage phase difference between the jth node and the kth node, thetakIs the voltage phase of the kth node, Pj、QjRespectively the active power and the reactive power of the jth node, | VkI is the voltage amplitude of the kth node, Gjk、BjkThe real part and the imaginary part of a complex admittance of a jth node and a kth node are respectively, j, k is 1, 2,.
Branch flow constraint:
Fjk，min≤Fjk≤Fjk，max
Fjk＝Re(Sjk)
Figure FDA0003524014690000071
in the above formula, FjkActive power flow for the branch jk from the jth node to the kth node, Fjk，max、Fjk，minMaximum and minimum power flow transmission values, R, respectively allowed for branch jke() To obtain a function of the real part of the complex number, SjkFor the complex power of the branch jk,
Figure FDA0003524014690000072
the conjugate values of the voltage of the j-th node and the k-th node respectively,
Figure FDA0003524014690000073
the equivalent admittance conjugate values of the branch jk to ground and the line are respectively.
6. The multi-energy-storage-power-station wide-area coordinated scheduling method of the high-permeability new-energy power system according to claim 1 or 2, characterized by comprising the following steps:
in the step B, the total power requirement of the energy storage power station of the power system is determined by the following formula:
Figure FDA0003524014690000074
in the above formula, Pd，ch，t、Pd，dis，tRespectively the total power requirements of charging and discharging of the energy storage power station of the power system at the target time t of the dispatching operation day, PL，t、Pw，t、Pv，t、Pg，tThe method comprises the steps of dispatching the load value of a power system, the power of a wind power supply, the power of a solar power generation supply and the power of a conventional energy power generation supply in a target time period t of a running day.
7. The multi-energy-storage-power-station wide-area coordinated scheduling method of the high-permeability new-energy power system according to claim 1 or 2, characterized by comprising the following steps:
in step a, the condition that the scheduling response requirement is satisfied is that the following inequalities are all true:
Pi，max≥Pi，max，req
ΔPi，max≥ΔPi，mαx，req
Qi，max≥Qi，max，req
in the above formula, Pi，max、ΔPi，max、Qi，maxRespectively the maximum adjustable power, the maximum adjustable power rate and the maximum adjustable capacity of the ith energy storage power station, Pi，max，req、ΔPi，max，req、Qi，max，reqAnd the lower limit requirements of the power system dispatching mechanism on the maximum adjustable power, the maximum adjustable power rate and the maximum adjustable capacity of the ith energy storage power station in single adjustment are respectively set.
CN202210187128.8A 2022-02-28 2022-02-28 Multi-energy-storage power station wide area coordinated scheduling method of high-permeability new energy power system Pending CN114583726A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117578601A (en) * 2023-03-22 2024-02-20 长沙学院 Low-carbon power system source load interactive scheduling method and device
CN117937550A (en) * 2024-03-25 2024-04-26 宁波市电力设计院有限公司 Optimized scheduling method and system for comprehensive energy storage system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117578601A (en) * 2023-03-22 2024-02-20 长沙学院 Low-carbon power system source load interactive scheduling method and device
CN117578601B (en) * 2023-03-22 2024-04-26 长沙学院 Low-carbon power system source load interactive scheduling method and device
CN117937550A (en) * 2024-03-25 2024-04-26 宁波市电力设计院有限公司 Optimized scheduling method and system for comprehensive energy storage system

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