CN113258618A

CN113258618A - Active power control strategy for networking energy storage power supply and clean energy

Info

Publication number: CN113258618A
Application number: CN202110668947.XA
Authority: CN
Inventors: 胡林; 刘永珺; 马月姣; 李铁山; 胡丰; 陶卿; 王海达; 吴长洪; 金闻; 杨龙保
Original assignee: Huaneng Lancang River Hydropower Co Ltd
Current assignee: Huaneng Lancang River Hydropower Co Ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2021-08-13

Abstract

The invention discloses an active power control strategy for networking an energy storage power supply and clean energy, which is characterized in that the energy storage power supply and the clean energy are coordinately controlled through a complementary integrated power supply centralized control center; the complementary integrated power supply centralized control center is provided with a complementary integrated unit, an energy storage power supply unit and a clean energy unit; the complementary integration unit sends an instruction for distributing the unit active power target value of the energy storage power supply unit and an instruction for generating a start-up and shut-down operation suggestion of the clean energy power supply unit to the energy storage power supply unit and the clean energy unit; the method is used for meeting the adjustment requirements of the total active power set value and primary frequency modulation of a complementary integrated power supply consisting of an energy storage power supply and clean energy and the charging and discharging requirements of an energy storage power supply battery. The invention introduces the battery state parameters of each unit of the energy storage power supply to adjust, inhibits the integral sensitivity of the integral control strategy, and realizes the combination of clean energy and the energy storage power supply to realize good economy and stability.

Description

Active power control strategy for networking energy storage power supply and clean energy

Technical Field

The invention belongs to the technical field of automatic control of power systems, and relates to an active power control strategy for networking an energy storage power supply and clean energy.

Background

With the implementation of new energy strategies, the proportion of clean energy in the Chinese power grid is continuously increased, but a clean energy power station which mainly comprises photovoltaic power generation and wind power generation is 'eating by the sky', the power generation capacity strongly depends on non-adjustable and non-storable meteorological resources, the power station has strong randomness and volatility characteristics, the safety of the power grid is seriously threatened, and particularly wind power is even 'garbage power' in partial occasions due to the inverse peak-load regulation characteristic that the power generation peak valley and the power consumption peak valley are completely opposite.

Unlike conventional and clean energy power supplies, energy storage power supplies do not have the ability to produce electricity (i.e., generate electricity independently), but rely on battery storage systems and through the control of charging and discharging the battery storage systems to provide additional power storage and bidirectional (charging and discharging) regulation capabilities for the power system beyond conventional and clean energy power supplies. Although electric power production cannot be carried out, the energy storage power supply has incomparable technical advantages in the aspects of active power regulation delay, regulation rate, regulation precision and the like compared with a conventional power supply and a clean energy power supply due to the mechanism and the characteristics of the energy storage power supply, can meet the regulation requirements of primary frequency modulation and secondary frequency modulation of an electric power system at the same time, and greatly enhances the dynamic balance capacity of consumption and supply of the electric power system.

The method has the advantages that the problems that the clean energy source does not have adjusting capacity and the energy storage power source does not have generating capacity are solved. The energy storage power supply has extremely low regulation delay, extremely high regulation speed and extremely high regulation precision, so that the problem of random fluctuation of the output power of clean energy in a short time can be solved to a great extent. However, due to the limitation of the current electrochemical energy storage technology, the energy storage power supply cannot realize the real power storage, and can be only used as an auxiliary adjusting means, and is still limited by the problem that the clean energy meteorological resources cannot be stored.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an active power control strategy for networking an energy storage power supply and clean energy, and the battery state parameters of each unit of the energy storage power supply are introduced for adjustment, so that the power generation compensation of the energy storage power supply for adjusting the clean energy and the adjustment of a primary frequency modulation target are realized, and the economy and the stability of the clean energy power generation are improved.

The invention is realized by the following technical scheme:

an active power control strategy for networking an energy storage power supply and clean energy carries out coordination control on the energy storage power supply and the clean energy through a complementary integrated power supply centralized control center:

the complementary integrated power supply centralized control center is provided with a complementary integrated unit, an energy storage power supply unit and a clean energy unit; the complementary integration unit sends an instruction for distributing the unit active power target value of the energy storage power supply unit and an instruction for generating a start-up and shut-down operation suggestion of the clean energy power supply unit to the energy storage power supply unit and the clean energy unit; the regulation requirements of the total active power set value and primary frequency modulation of a complementary integrated power supply consisting of an energy storage power supply and clean energy and the charge-discharge requirements of an energy storage power supply battery are met;

the complementary integration unit distributes the unit active power target value of the energy storage power supply unit as follows:

the method comprises the steps that a total active power set value of a complementary integrated power supply is added with a unit primary frequency modulation target regulating quantity of a clean energy power supply unit, and then a unit active power real value of the clean energy power supply unit is subtracted to obtain an active power output deviation of the clean energy power supply unit;

updating the compensation adjustment quantity of the energy storage power supply unit according to the active power output deviation and a fixed period; the unit active power target value of the energy storage power supply unit is equal to the compensation adjustment quantity subjected to dead zone processing minus the charging and discharging correction power of the energy storage power supply unit;

the charging and discharging correction power is calculated by the energy storage power supply unit according to the ideal rated charging and discharging power, the battery capacity and the battery charging and discharging threshold in cycles and is sent to the complementary integrated unit;

the complementary integrated unit generates a start-up and shut-down operation suggestion for the clean energy unit according to a possible active power fluctuation sequence range corresponding to a start-up and shut-down sequence of the clean energy unit in a period of time in the future and a mismatch quantitative value of a total active power set value of the complementary integrated power supply;

the energy storage power supply unit obtains energy storage power supply control intermediate parameters according to the basic parameters of the energy storage power supply and sends the energy storage power supply control intermediate parameters to the complementary integration unit, and unit-level AGC distribution and unit active power closed-loop regulation of the energy storage power supply are carried out according to the received active power target value;

the clean energy unit obtains clean energy power supply control intermediate parameters according to clean energy including wind power and photovoltaic power generation and sends the parameters to the complementary integrated unit; and sending the suggested instructions of the start-up and shutdown operations of the wind power generator set and the photovoltaic generator set.

Compared with the prior art, the invention has the following beneficial technical effects:

the invention takes the unit active power target value as the regulation target and the explanation demarcation point of the new energy power supply unit and the energy storage power supply unit, thereby conveniently carrying out mechanism analysis and control on the combination of the functional blocks; for a clean energy power supply which does not have a primary frequency modulation function and must bear a primary frequency modulation obligation because the clean energy power supply is used as a power generation power supply, a control strategy of transferring a primary frequency modulation task to an energy storage power supply is adopted; and the charging and discharging correction power is introduced into the active power target value of the energy storage power supply unit, and the power grid is used as a charging and discharging source of the energy storage power supply battery at the cost of the total output error of the integrated power supply within the tolerable degree of the power grid.

The method takes the shallow charging and shallow discharging problem of the battery as the focus of attention on the energy storage power supply, on one hand, battery state parameters of each unit of the energy storage power supply are introduced into the adjustment coefficient calculation of the energy storage unit, and on the other hand, a control strategy for preventing the adjustment coefficients of each energy storage unit from being changed violently is designed, so that the requirements of battery state balance of each unit and the requirements of dynamic stability of active power in the adjustment process are considered at the same time; further aiming at the nonideal of the adjusting process and the adjusting result caused by the problems of time delay, precision and the like of power supply adjustment, parameters such as an operation dead zone and the like are introduced into an active power control strategy in a large quantity so as to inhibit the overall sensitivity of the control strategy and prevent the problems of overhigh calculation frequency, frequent change of an adjusting target, excessive compensation and the like; therefore, the combination of clean energy and an energy storage power supply is realized, and good economy and stability are realized.

Drawings

FIG. 1 is a block diagram of the computing and control logic of the energy storage power supply unit of the present invention;

FIG. 2 is a logic flow diagram of calculating the adjustment coefficients of the energy storage units of the energy storage power supply unit according to the present invention;

FIG. 3 is a schematic diagram showing the relationship between the proportional variation of the battery SOC capacity for the upward and downward adjustment validation threshold parameters of each energy storage unit according to the present invention;

FIG. 4 is a simulation modeling diagram of the complementary integrated power supply of "clean energy + energy storage power supply" according to the present invention;

FIG. 5 is a diagram illustrating the adjustment effect of the "clean energy + energy storage power supply" complementary integrated power supply of the present invention;

fig. 6 is a diagram illustrating the adjustment effect of shallow charging and shallow discharging of the energy storage battery in the complementary integrated power supply of "clean energy source + energy storage power supply" according to the present invention.

Detailed Description

The present invention will now be described in further detail with reference to the following examples, which are intended to be illustrative, but not limiting, of the invention.

The operation of the complementary integrated unit comprises:

s1100) input parameters:

s1111) directly inputting a total active power set value of the complementary integrated power supply;

s1112) unit active power rated capacity sent by each type of power supply unit, wherein the unit active power rated capacity of the clean energy power supply is equal to the sum of wind power being generated and single machine active power rated capacity of the photovoltaic unit, and the unit active power rated capacity of the energy storage power supply depends on the rated capacity of each energy storage unit and the charge state of a battery;

s1113) real active power value of the unit, wherein the real active power value of the unit of the clean energy unit is the sum of the real active power values of the units of the clean energy power supply unit, and the real active power value of the unit of the energy storage power supply unit is the sum of the real active power values of the units of the energy storage power supply unit;

s1120) parameters sent by the energy storage power supply unit:

s1121) the charging and discharging correction power of the energy storage power supply unit is calculated by the energy storage power supply unit according to parameters such as battery states of the energy storage units;

s1122) adjusting dead zones of unit active power of the energy storage power supply unit, wherein the dead zones are equal to the sum of the dead zones of single-machine active power adjustment of the running unit;

s1130) input parameters sent by the clean energy power supply unit:

s1131) the real unit active power value of the clean energy power supply unit is involved in the calculation amount, and the calculation amount is obtained by the clean energy power supply unit according to the real unit active power value and the dead output area of each clean energy unit;

s1132), the real unit active power value of the clean energy power supply unit is involved in the calculated quantity filtering value, and the clean energy power supply unit calculates the real unit active power value and the dead output area of each clean energy unit;

s1133), the possible active power fluctuation range of the clean energy power supply unit is a prediction result of the active power fluctuation range of the clean energy power supply unit within a certain time in the future;

s1134), a starting sequence and a stopping sequence of the clean energy power supply unit and a possible active power fluctuation range sequence respectively corresponding to the starting sequence and the stopping sequence are used for generating a starting and stopping operation suggestion for the clean energy unit.

S1135), the unit primary frequency modulation target regulating quantity of the clean energy power supply unit is respectively equal to the sum of the wind power which is generating and the single-machine primary frequency modulation target regulating quantity of the photovoltaic unit.

Each unit is described in detail below.

As shown in fig. 1, S2000) the energy storage power supply unit performs unit-level AGC allocation and unit active power closed-loop adjustment of the energy storage power supply, and calculates various intermediate parameters for the complementary integrated unit, specifically including:

s2100) calculating the charged capacity proportion of each energy storage unit battery of the energy storage power supply unit and the charged total capacity proportion of the energy storage power supply unit batteries:

s2110) calculating the charge capacity proportion of each energy storage unit battery,

in the formula r_iFor the battery state of charge capacity ratio, SOC, of the energy storage unit i_iIs the battery charge state of the energy storage unit i,

and

respectively representing the maximum value and the minimum value of the battery charge of the energy storage unit i; for example when certain energy storage unit SOC_i＝50，

And

respectively 100 and 10, then

S2120) calculating the overall capacity ratio of the energy storage power source unit cell charge,

in the formula, r is the total capacity proportion of the energy storage power supply unit battery charge; for example, if a certain energy storage power supply unit comprises 3 energy storage units, the battery state of charge is 40, 50 and 60 respectively, the maximum battery state of charge is 100, 110 and 120 respectively, and the minimum battery state of charge is 0, 5 and 10 respectively, then

S2200) setting a judgment threshold R of the overall capacity proportion of the state of charge of the energy storage power supply unit cell₁’～R₆' the setting principle comprises: s2210)0 < R₁’＜R₂’＜R₃’＜R₄’＜R₅’＜R₆’＜1；

S2220)R₁’+R₆’＝1；

S2230)R₂’+R₅’＝1；

S2230)R₃’+R₄’＝1。

In this example, R is₁’～R₆' is set to 20%, 30%, 45%, 55%, 70%, 80%, respectively.

S2300) judging the battery total electric quantity state of the energy storage power supply unit, including:

s2310) when the total capacity proportion of the charged energy storage power supply unit batteries obtained in S2120 is not less than 0_r＜R₁When the battery of the energy storage power supply unit is in an extremely low power state;

s2320) when R is present₁’≤_r＜R₂When the battery of the energy storage power supply unit is in a lower state of charge;

s2330) when R is₂’≤_r＜R₃' or R₄’＜_r≤R₅When the battery is in a more ideal electric quantity state, the whole battery of the energy storage power supply unit is in a more ideal electric quantity state;

s2340) when R₃’≤_r≤R₄When the battery of the energy storage power supply unit is in an extremely ideal electric quantity state;

s2350) when R is present₅’＜_r≤R₆When the battery of the energy storage power supply unit is in a higher state of charge;

s2360) when R is₆’＜_rWhen the battery capacity is less than or equal to 1, the battery of the energy storage power supply unit is in an extremely high electric quantity state.

S2400) setting judgment threshold R of battery state-of-charge capacity proportion of energy storage unit₁～R₄The setting principle is as follows:

S2210)0＜R₁＜R₂＜R₃＜R₄＜1；

S2220)R₁+R₄＝1；

S2230)R₂+R₃＝1。

this example will show that₁～R₄Set to 20%, 40%, 60%, 80%, respectively.

S2500) setting auxiliary calculation parameters of the adjustment coefficients of the energy storage units of the energy storage power supply unit, including:

s2510) setting 4 threshold parameters K₁、K₂、K₃、K₄Wherein 0 < K₁＜K₂＜K₃＜K₄This example compares K with₁～K₄Respectively set to 0.5, 1, 1.5 and 2;

s2520) setting a variation gradient parameter delta K of the regulating coefficient of the energy storage unit, wherein delta K is more than 0 and less than min₁,K₂－K₁,K₃－K₂,K₄－K₃]Wherein min 2]In order to take a minimum function, setting Δ K is to prevent the dynamic stability of the real power value of the unit from being reduced due to too severe change of the adjustment coefficient of the energy storage unit in the adjustment process, and in this embodiment, Δ K is set to 0.1;

s2600) calculating an adjustment coefficient of each energy storage unit of the energy storage power supply unit, as shown in fig. 2, specifically including:

s2610) calculating upward adjustment coefficients of each energy storage unit of the energy storage power supply unit:

s2611) initializing upward adjusting coefficients of each energy storage unit of the energy storage power supply unit

In the formula

The upward adjustment coefficient of the energy storage unit i is obtained;

s2612) according to the fixed cycle to every energy storage unit upward adjustment coefficient revise, namely according to the fixed cycle continuously cycle operation follow-up step;

s2613) calculating effective threshold parameters of upward adjustment of each energy storage unit

When r is more than or equal to 0_i＜R₁Time of flight

When R is₁≤r_i＜R₂Time of flight

When R is₂≤r_i≤R₃Time of flight

When R is₃＜r_i≤R₄Time of flight

When R is₄＜r_iWhen the temperature is less than or equal to 1

S2614) comparison

And

when the absolute value of the difference between the two is less than or equal to delta K

When the absolute value of the difference between the two is greater than delta K and

time of flight

time of flight

E.g. certain energy storage units

And

all are equal to 1 originally, and the proportion of the charge capacity of the battery is reduced to R in the discharging process₁And R₂In between, thus

With a consequent decrease of 0.5, so that in the next few cycles,

corrected to 0.9, 0.8, 0.7, 0.6, 0.5, respectively.

S2620) calculating downward adjustment coefficients of each energy storage unit of the energy storage power supply unit, including:

s2621) initializing and setting downward adjustment coefficients of energy storage units of energy storage power supply unit

In the formula

The downward adjustment coefficient of the energy storage unit i is obtained;

s2622) correcting the downward adjustment coefficients of the energy storage units according to a fixed period, namely continuously and circularly operating the subsequent steps according to the fixed period;

s2623) calculating effective threshold parameters of downward adjustment of each energy storage unit _ikWhen 0 is less than or equal to r_i＜R₁Time of flight _ik＝K₄When R is₁≤r_i＜R₂Time of flight _ik＝K₃When R is₂≤r_i≤R₃Time of flight _ik＝K₂When R is₃＜r_i≤R₄Time of flight _ik＝K₁When R is₄＜r_iWhen the temperature is less than or equal to 1 _ik＝0；

S2624) comparison

And _ikwhen the absolute value of the difference between the two is less than or equal to Δ K

time of flight

time of flight

In the above embodiment, the effective threshold parameters of the energy storage units adjusted up and down according to the battery state-of-charge capacity ratio ri

_ikAs shown in fig. 3, as the soc capacity ratio of the battery increases, the upward adjustment effective threshold parameter of the energy storage unit increases, and the downward adjustment effective threshold parameter decreases, and since the upward adjustment coefficient and the downward adjustment coefficient of the energy storage unit respectively tend to change according to the upward adjustment effective threshold parameter and the downward adjustment effective threshold parameter, the upward adjustment coefficient and the downward adjustment coefficient of the energy storage unit also increase and decrease according to the increase of the soc capacity ratio of the battery.

S2700) unit active power target value of the energy storage power supply unit is subjected to unit-level AGC distribution, and the unit-level AGC distribution comprises the following steps:

s2710) when the unit active power target value of the energy storage power supply unit is equal to 0, setting the single-machine active power value of each energy storage unit is equal to 0;

s2720) when the unit active power target value of the energy storage power supply unit is greater than 0, the single-machine active power set value of each energy storage unit is distributed according to the mutual proportion of the product of the upward adjustment coefficient of each energy storage unit and the battery capacity, namely the single-machine active power set value of each energy storage unit is equal to

In the formula

The active power target value of the unit of the energy storage power supply unit is obtained, if the calculation result is larger than the positive single-machine active power rated capacity of the energy storage unit, the positive single-machine active power rated capacity of the energy storage unit is used as a single-machine active power set value, and if the active power target value of the energy storage power supply unit is 300MW, 3 energy storage units are provided

0.5, 1, 1.5, respectively, cell capacity

200MW, 150MW, 220MW respectively, the single active power set values of 3 energy storage units are respectively

S2730) when the unit active power target value of the energy storage power supply unit is less than 0, the single active power set value of each energy storage unit is distributed according to the mutual proportion of the product of the downward adjustment coefficient and the battery capacity of each energy storage unit, namely the single active power set value of each energy storage unit is equal to

If the calculation result is smaller than the negative single-machine active power rated capacity of the energy storage unit, taking the negative single-machine active power rated capacity of the energy storage unit as a single-machine active power set value, and assuming that the active power target value of the energy storage power supply unit is-300 MW, 3 energy storage units exist

0.5, 1, 1.5, respectively,

cell capacity

200, 150 and 220MW respectively, and the single active power set values of the 3 energy storage units are-51.7, -77.6 and-170.7 MW respectively.

As described in S2600, the upward adjustment coefficient and the downward adjustment coefficient of the energy storage unit respectively increase and decrease with the increase of the soc capacity ratio of the battery, so according to the calculation manners of S2720 and S2730, when the active power target value of the energy storage unit is greater than 0, that is, the energy storage unit is generally in a discharge state, the energy storage unit with a higher soc capacity ratio of the battery tends to discharge, and when the active power target value of the energy storage unit is less than 0, that is, the energy storage unit is generally in a charge state, the energy storage unit with a lower soc capacity ratio of the battery tends to charge, so that the soc capacity ratios of the energy storage units can be kept consistent, and the battery of one or several energy storage units can be prevented from being overcharged or overdischarged compared with the batteries of other energy storage units.

S2800) controlling the active power of each energy storage unit of the energy storage power supply unit, calculating the deviation between the single-machine active power real output value and the single-machine active power set value by taking the single-machine active power set value as a target, and outputting a continuous signal according to the calculation result to adjust the single-machine active power real output value of the energy storage unit, so that the single-machine active power real output value of the energy storage unit tends to the single-machine active power set value and is finally stabilized in the adjustment dead zone range of the single-machine active power set value.

S2900) calculating the unit active power rated capacity of the energy storage power supply unit:

s2910) calculating upward adjusting capacity of each energy storage unit of the energy storage power supply unit, and the method comprises the following steps:

s2911) when the energy storage unit is adjusted upwards as calculated in S2613, the effective threshold parameter

Then, the upward regulating capacity of the unit is the positive single-machine active power rated capacity of the unit;

s2912) when the energy storage unit is adjusted upwards as calculated in S2613, the effective threshold parameter

The upward regulating capacity of the unit is the product of the positive single-machine active power rated capacity of the unit and the rated capacity

Then divided by K₂；

For example, when the forward single-machine active power rated capacity of the unit is 50MW, if K is₂When 1, then

When the power is 1.5, 1 and 0.5 respectively, the upward adjusting capacity of the unit is 50, 50 and 25MW respectively.

S2920) accumulating the upward adjusting energy of each energy storage unit obtained in the S2910 to obtain the active power rated capacity of the forward unit of the energy storage power supply unit;

s2930) calculating the downward adjusting capacity of each energy storage unit of the energy storage power supply unit, and the method comprises the following steps:

s2931) when the energy storage unit is adjusted downwards as calculated in S2623, the effective threshold parameter _ik≥K₂Then, the downward regulating capacity of the unit is the negative single-machine active power rated capacity of the unit;

s2932) when the energy storage unit is adjusted downwards as calculated in S2623, the effective threshold parameter _ik＜K₂The downward regulating capacity of the unit is the product of the negative single-machine active power rated capacity of the unit and the rated capacity _ikThen divided by K₂。

S2940) accumulating the downward regulating energy of each energy storage unit obtained in S2930 to obtain the negative direction unit active power rated capacity of the energy storage power supply unit.

The following is a description of the clean energy unit.

S3000), the operation of the clean energy unit is as follows:

s3100) if the clean energy unit is provided with the power prediction system, adopting a power prediction function to outputFuture T of each clean energy unit₁The possible fluctuation range of the active power over time;

if the power prediction system is not deployed, the following method is adopted:

s3121) for a clean energy plant for power generation, using the current power times an upper prediction parameter as the future T₁Using the current power multiplied by a lower limit prediction parameter as the lower limit value of the possible fluctuation range of the active power, wherein the upper limit prediction parameter is more than 1 and the lower limit prediction parameter is more than 0; the upper limit prediction parameter and the lower limit prediction parameter adopt fixed values or set dynamic parameters according to prior experience;

s3122) for clean energy machine set without power generation, using future T of power machine set with performance identical or similar to that of the clean energy machine set₁The possible fluctuation range of the active power in time is used as the future T of the unit₁The possible fluctuation range of active power in time;

s3130) calculating a future T₁The unit active power of the clean energy power supply unit in time is within a possible fluctuation range: will be T in future₁Accumulating and summing the upper limits of possible fluctuation ranges of the active power of all the generator sets of the clean energy power supply unit within the time to serve as the upper limit of the possible fluctuation ranges; will be T in future₁Accumulating and summing the lower limits of possible fluctuation ranges of the active power of all the generator sets of the clean energy power supply unit in time to serve as the lower limit of the possible fluctuation ranges;

s3200) respectively generating a start-up and shut-down sequence aiming at the photovoltaic unit and the wind generating set comprises the following steps:

s3210) generating a shutdown sequence of the generating photovoltaic unit and the wind generating unit, wherein the priority is calculated according to the duration of the unit in the generating state, and the longer the duration of the unit in the generating state is, the higher the priority is;

s3220) generating a starting sequence of available photovoltaic units and wind turbine units which do not generate electricity, wherein the priority is calculated according to the duration of the units in the non-electricity-generating state, and the longer the duration of the units in the non-electricity-generating state is, the higher the priority is;

s3300) respectively generating possible active power fluctuation range sequences corresponding to the startup and shutdown sequences aiming at the photovoltaic unit and the wind turbine unit, wherein the possible active power fluctuation range sequences comprise:

s3310) respectively generating possible fluctuation range sequences of active power corresponding to the starting sequence aiming at the photovoltaic unit and the wind generating unit:

s3311) setting variable u₁，u₁Is 1;

s3312) adding the possible fluctuation range of the active power of the clean energy power supply unit to the sequence u in the wind power or photovoltaic starting sequence₁The possible fluctuation range of the active power of the unit is obtained, and the sequence u in the possible fluctuation range sequence of the active power corresponding to the wind power or photovoltaic starting sequence is obtained₁In which u is ordered₁The upper limit of the range of (a) is equal to the upper limit of the possible fluctuation range of the active power of the clean energy power supply unit plus the sequence u in the wind power or photovoltaic starting sequence₁The upper limit of the possible fluctuation range of the active power of the unit is sorted u₁The lower limit of the range is equal to the lower limit of the possible fluctuation range of the active power of the clean energy power supply unit and the sequence u in the wind power or photovoltaic starting sequence₁The lower limit of the possible fluctuation range of the active power of the unit;

s3313) determination of u₁Whether the length of the sequence is equal to the length of a wind power or photovoltaic starting sequence or not, if u₁If the length of the wind power or photovoltaic power-on sequence is equal to the length of the wind power or photovoltaic power-on sequence, the step S3310 is terminated, otherwise u is executed₁＝u₁+1, and then continuing to perform the subsequent steps;

s3314) sorting u in the possible fluctuation range sequence of the active power corresponding to the wind power or photovoltaic starting sequence₁Range of-1, plus sequence u in a wind or photovoltaic startup sequence₁The possible fluctuation range of the active power of the wind power or photovoltaic generator set is obtained, and the sequence u in the possible fluctuation range sequence of the active power corresponding to the wind power or photovoltaic startup sequence is obtained₁In which u is ordered₁Is equal to the rank u₁Upper limit of range of-1 plus sequence u in wind or photovoltaic startup sequence₁The upper limit of the possible fluctuation range of the active power of the unit is sorted u₁Is equal to the rank u₁Lower bound of the range of-1 plus the sequence u in the wind or photovoltaic boot sequence₁Active power of the unitThe lower limit of the fluctuation range;

s3315) jumping to step S3313 until u₁Ending when the length of the wind power or photovoltaic starting sequence is equal to the length of the wind power or photovoltaic starting sequence;

s3320) respectively generating possible fluctuation range sequences of active power corresponding to the shutdown sequence aiming at the photovoltaic unit and the wind power unit comprises the following steps:

s3321) setting variable u₂，u₂Is 1;

s3322) subtracting the sequencing u in the wind power or photovoltaic shutdown sequence from the possible fluctuation range of the active power of the clean energy power supply unit₂The possible fluctuation range of the active power of the unit is obtained, and the sequence u in the possible fluctuation range sequence of the active power corresponding to the wind power or photovoltaic shutdown sequence is obtained₂In which u is ordered₂The upper limit of the range of (1) is equal to the upper limit of the possible fluctuation range of the active power of the clean energy power supply unit minus the sequence u in the wind power or photovoltaic shutdown sequence₂The upper limit of the possible fluctuation range of the active power of the unit is sorted u₂The lower limit of the range is equal to the lower limit of the possible fluctuation range of the active power of the clean energy power supply unit minus the sequence u in the wind power or photovoltaic shutdown sequence₂The lower limit of the possible fluctuation range of the active power of the unit;

s3323) judgment of u₂Whether it is equal to the length of the wind or photovoltaic shutdown sequence, if u₂Equal to the length of the wind or photovoltaic shutdown sequence, step S3320 is terminated, otherwise u is executed₂＝u₂+1, and then continuing to perform the subsequent steps;

s3324) sequencing u in the possible fluctuation range sequence of the active power corresponding to the wind power or photovoltaic shutdown sequence₂Range of-1, minus the order u in the wind or photovoltaic shutdown sequence₂The possible fluctuation range of the active power of the unit is obtained, and the sequence u in the possible fluctuation range sequence of the active power corresponding to the wind power or photovoltaic shutdown sequence is obtained₂In which u is ordered₂Is equal to the rank u₂Upper limit of range of-1 minus sequence u in wind or photovoltaic shutdown sequence₂The upper limit of the possible fluctuation range of the active power of the unit is sorted u₂Is equal to the rank u₂Lower limit of range of-1 minus the order u in the wind or photovoltaic shutdown sequence₂The lower limit of the possible fluctuation range of the active power of the unit;

s3325) to step S3323 until u₂Ending when the length of the wind power or photovoltaic shutdown sequence is equal to the length of the wind power or photovoltaic shutdown sequence;

s3400) calculating the real unit active power value of the clean energy power supply unit, and the calculated quantity is as follows:

s3410) initially setting the active power real-sending value parameter calculation quantity of the clean energy power supply unit to be equal to the unit active power real-sending value;

s3420) setting output dead zones of all the units of the clean energy power supply unit, and accumulating to obtain unit output dead zones of the clean energy power supply unit;

s3430) comparing the real active power value of the clean energy power supply unit with the calculated quantity and the real active power value of the clean energy power supply unit at the current period according to a fixed period:

s3431) if the absolute value of the difference value of the two is less than or equal to the output dead zone of the clean energy power supply unit, the active power actual output value parameter of the clean energy power supply unit and the calculated quantity are kept unchanged;

s3432) if the absolute value of the difference value of the two is larger than the output dead zone of the clean energy power supply unit, the active power real-sending value parameter of the clean energy power supply unit is equal to the active power real-sending value of the clean energy power supply unit in the current period;

s3500) calculating the unit active power actual value of the clean energy power supply unit and the calculated value of the filtered value:

s3510) initially setting the real active power value of the clean energy power supply unit and the calculated value of the filter to be equal to the real active power value of the unit;

s3520) calculating a filtering threshold of an active power actual value of the clean energy power supply unit, comprising:

s3521) setting a scaling coefficient lambda, lambda is larger than 1;

s3522) the filtering threshold of the active power actual emission value of the clean energy power supply unit is equal to the unit output dead zone multiplied by lambda in S3420;

s3530) comparing the real active power value of the clean energy power supply unit with the calculated value of the filter and the real active power value of the clean energy power supply unit at the current period according to a fixed period:

s3531) if the absolute value of the difference value of the two is less than or equal to the filtering threshold obtained in S3522, the filtering value of the active power actual emission value and the calculated value of the clean energy power supply unit is kept unchanged;

s3532) if the absolute value of the difference value of the absolute value of the difference value of the absolute value;

s3600) the unit primary frequency modulation target regulating quantity of the clean energy power supply unit is as follows:

s3610) the power grid frequency deviation is equal to the power grid rated frequency minus the real-time frequency of the power grid;

s3620) if the absolute value of the power grid frequency deviation is smaller than or equal to a primary frequency modulation threshold, the unit primary frequency modulation target regulating quantity of the clean energy power supply unit is equal to 0;

s3630) if the absolute value of the power grid frequency deviation is larger than a primary frequency modulation threshold, the unit primary frequency modulation target regulating quantity of the clean energy power supply unit is equal to the real active power value of the clean energy power supply unit multiplied by the power grid frequency deviation multiplied by a clean energy primary frequency modulation regulating coefficient given by a power grid.

The following is a detailed description of the complementary integrated unit.

S4000), distributing a unit active power target value of an energy storage power supply unit, and calculating a start-stop operation suggestion of a clean energy power supply unit to meet the regulation requirements of a total active power set value and primary frequency modulation of a complementary integrated power supply and the charge-discharge requirements of an energy storage power supply battery, wherein a control model is shown in figure 4, and in order to visually display the regulation effect, the influence of the primary frequency modulation is eliminated in the control model, but technicians in the industry can easily know that the implementation effect of the method cannot be influenced even if primary frequency modulation response of the energy storage power supply to the clean energy power supply is introduced. The method specifically comprises the following steps:

s4100) calculating future T₁Cleaning in timeUnit active power containment range of net power supply unit, where T₁For the artificial setting parameters described in S3100, including:

s4110) calculating future T₁The lower limit of the unit active power accommodation range of the clean energy power supply unit at each time point in time comprises:

s4111) if the active power plan curve of the complementary integrated power supply is issued in advance by scheduling, the future T is determined₁Subtracting the positive unit active power rated capacity of the energy storage power supply unit obtained by S2920 from the total active power set value of the complementary integrated power supply at each time point in time, namely the positive unit active power rated capacity is the future T₁The lower limit of the unit active power accommodation range of the clean energy power supply unit at each time point in time;

s4112) if the active power plan curve of the complementary integrated power supply is not issued in advance in scheduling, subtracting the positive unit active power rated capacity of the energy storage power supply unit obtained in S2920 from the total active power set value of the current complementary integrated power supply to serve as the future T₁The lower limit of the unit active power accommodation range of the clean energy power supply unit at each time point in time;

s4120) calculating future T₁The upper limit of the unit active power accommodation range of the clean energy power supply unit at each time point in time comprises:

s4121) if the scheduling issues the active power plan curve of the complementary integrated power supply in advance, then T will be sent in the future₁Subtracting the negative cell active power rated capacity of the energy storage power supply unit obtained by S2940 from the total active power set value of the complementary integrated power supply at each time point in time, namely the negative cell active power rated capacity is the future T₁The upper limit of the unit active power accommodation range of the clean energy power supply unit at each time point in time;

s4122) if the active power plan curve of the complementary integrated power supply is not issued in advance in the scheduling process, subtracting the negative unit active power rated capacity of the energy storage power supply unit obtained in the step S2940 from the total active power set value of the current complementary integrated power supply to serve as the future T₁The upper limit of the unit active power accommodation range of the clean energy power supply unit at each time point in time;

s4130) future T₁The unit active power accommodation range of the clean energy power supply unit in time is T in the future₁The unit active power accommodation ranges of the clean energy power supply units at each time point in time are intersected, namely T in the future₁The upper limit of the unit active power accommodation range of the clean energy power supply unit in time is equal to the minimum value of the upper limit of the accommodation range at each time point, and T is in the future₁The lower limit of the unit active power accommodation range of the clean energy power supply unit in time is equal to the maximum value of the lower limit of the accommodation range at each time point, and the future T is assumed₁The total active power set value is gradually reduced from 200MW to 150MW and gradually increased to 250MW over time, wherein the total active power set values at certain time points are 200, 170, 150, 210, 250MW, the total up-regulation capacity of the energy storage power supply unit is 50MW, and the total down-regulation capacity is-100 MW, then the lower limit of the unit active power accommodation range corresponding to each time point obtained by S4110 is 200-50-150, 170-50-120, 150-50-100, 210-50-160, 250-50-200 MW, the upper limit of the unit active power accommodation range corresponding to each time point obtained by S4120 is 200+ 100-300, 170+ 100-270, 150+ 100-250, 210+ 100-310, 250+ 100-350, the accommodation ranges corresponding to each time point are 150,300, (120,270), (100,250), (160,310), (200,350), and the future intersection is obtained, and T is obtained₁The unit active power accommodation range of the clean energy power supply unit in time is (200, 250).

S4200) calculating the matching degree of the total active power set value of the complementary integrated power supply and the on-off state of the clean energy power supply unit, and judging whether the on-off operation of the clean energy power supply unit is needed, wherein the step together with the subsequent steps S4300 and S4400 of finding the on-off operation suggestion specifically comprises the following steps:

s4210) manually setting a judgment threshold parameter for recommending start-up and shut-down operations;

s4220) calculating the on-off state and the future T of the current clean energy power supply unit₁The mismatch degree quantization value of the total active power set value of the complementary integrated power supply in time comprises the following steps:

s4221) calculating the upper limit mismatching degree of the range, and calculating the future T obtained in S3131₁TimeThe future T obtained by subtracting S4130 from the upper limit of the possible fluctuation range of the active power of the internal clean energy power supply unit₁The upper limit of the unit active power accommodation range of the clean energy power supply unit in time is judged, if the upper limit of the unit active power accommodation range is larger than 0, the degree of mismatching of the upper limit of the range is equal to the calculation result, and otherwise, the degree of mismatching of the upper limit of the range is equal to 0;

s4222) calculating the lower limit mismatching degree of the range, and calculating the future T obtained in S4130₁The future T obtained by subtracting S3132 from the lower limit of the unit active power accommodation range of the clean energy power supply unit in time₁Judging the calculation result according to the lower limit of the possible fluctuation range of the active power of the clean energy power supply unit in time, wherein if the calculation result is larger than 0, the lower limit mismatching degree of the range is equal to the calculation result, and otherwise, the lower limit mismatching degree of the range is equal to 0;

s4223) subtracting the range lower limit mismatching degree obtained by the step S4222 from the range upper limit mismatching degree of the step S4221 to obtain the starting and stopping state of the current clean energy power supply unit and the future T₁Quantization of mismatch of total active power set value of complementary integrated power supply over time, e.g. S4130 to obtain future T₁The unit active power accommodation range of the clean energy power supply unit in time is (200,250), when the possible fluctuation range of the active power of the clean energy power supply unit is (100,130), the degree of mismatch of the upper limit of the range is max [0, 130-]0, the mismatch at the lower end of the range is max [0,200-]100, then the mismatch quantization value 0-100, where max [ deg. ]]Is a function of the maximum.

S4230) comparing the absolute value of the mismatching degree quantized value obtained in the step S4223 with a judgment threshold parameter set in the step S4210, if the absolute value is smaller than the judgment threshold parameter, terminating the step S4200, and otherwise, performing the following steps to improve the on-off state and the future T of the clean energy power supply unit₁The matching degree of the total active power set value of the complementary integrated power supply in time comprises the following steps:

s4231) if the mismatch degree quantized value obtained in the step S4223 is larger than 0, performing a step S4300 to respectively find an operation proposal for stopping the wind turbine generator and an operation proposal for stopping the photovoltaic generator;

s4232) is asIf the mismatch degree quantization value obtained by the step S4223 is less than 0, the step S4400 is performed to respectively search an operation suggestion for starting the wind turbine generator which does not generate electricity and is available and an operation suggestion for starting the photovoltaic generator which does not generate electricity and is available, and the future T is exemplified according to the step S4223₁The unit active power accommodation range of the clean energy power supply unit in time is (200,250), the possible active power fluctuation range of the clean energy power supply unit is (100,130), the mismatching degree quantification value is-100, and obviously, an operation suggestion for starting the unit which does not generate electricity and is available is searched.

S4300) finding an operation suggestion for stopping the wind turbine generator for generating power and finding an operation suggestion for stopping the photovoltaic generator for generating power;

the wind power generation is taken as an example and specifically comprises the following steps:

s4310) setting variable v₁，v₁Is 1;

s4320) if v₁If the length of the wind power shutdown sequence is smaller than or equal to the length of the wind power shutdown sequence, setting an original mismatching degree quantization value variable, wherein the original mismatching degree quantization value variable is equal to the absolute value of the mismatching degree quantization value obtained in the step S4223, and otherwise, skipping to the step S4350;

s4330) calculating the sequence v in the possible fluctuation range sequence of the active power corresponding to the wind power shutdown sequence₁Range and future T of₁The mismatch degree quantization value of the total active power set value of the complementary integrated power supply in time comprises the following steps:

s4331) calculating the mismatching degree of the upper limit of the range, and sequencing v in the possible active power fluctuation range sequence corresponding to the wind power shutdown sequence₁The future T obtained by subtracting S4130 from the upper limit of the range of (1)₁The upper limit of the unit active power accommodation range of the clean energy power supply unit in time is judged, if the upper limit of the unit active power accommodation range is larger than 0, the degree of mismatching of the upper limit of the range is equal to the calculation result, and otherwise, the degree of mismatching of the upper limit of the range is equal to 0;

s4332) calculating the lower limit mismatching degree of the range, and comparing the future T obtained in S4130₁Arranging in a sequence of subtracting a possible fluctuation range of active power corresponding to a wind power shutdown sequence from the lower limit of the unit active power accommodation range of the clean energy power supply unit within timeSequence v₁If the lower limit is greater than 0, the lower limit mismatching degree of the range is equal to the calculation result, otherwise, the lower limit mismatching degree of the range is equal to 0;

s4333) subtracting the range lower limit mismatching degree obtained by S4332 from the range upper limit mismatching degree obtained by S4331 to obtain a sequence v in the possible active power fluctuation range sequence corresponding to the wind power shutdown sequence₁Range and future T of₁And complementing the mismatch quantization value of the total active power set value of the integrated power supply within the time.

S4340) subtracting the absolute value of the quantization value of the mismatch degree obtained by the S4333 from the original quantization value variable of the mismatch degree, and performing the following operations according to the calculation result:

s4341) if the calculation result is greater than or equal to the judgment threshold parameter set at S4210, v₁＝v₁+1 if v is present at this time₁If the length of the wind power shutdown sequence is larger than the length of the wind power shutdown sequence, jumping to a step S4350, otherwise, updating the original mismatching degree quantization value variable into the absolute value of the mismatching degree quantization value obtained in the step S4333, and jumping to the step S4330 to continue execution;

s4342) if the calculation result is less than the judgment threshold parameter set in S4210, jumping to S4350 and continuing to execute.

S4350) according to the variable v₁Generates an operation recommendation, comprising:

s4351) if v₁If 1, no operation suggestion is generated;

s4352) if v₁If the speed is more than 1, generating a shutdown operation suggestion, and sequencing 1 to v in the wind power shutdown sequence according to the suggestion₁-1 the corresponding wind turbine performs a shutdown operation.

S4400) finding an operation recommendation for starting up an available wind turbine generator and an available photovoltaic generator, wherein the operation recommendation comprises:

s4410) setting variable v₂，v₂Is 1;

s4420) if v₂If the length of the photovoltaic startup sequence is less than or equal to the length of the photovoltaic startup sequence, setting an original mismatch quantization value variableThe match degree quantization value variable is equal to the absolute value of the mismatch degree quantization value obtained in the step S4223, otherwise, the step S4450 is skipped to;

s4430) calculating the sequence v in the possible fluctuation range sequence of the active power corresponding to the photovoltaic startup sequence₂Range and future T of₁The mismatch degree quantization value of the total active power set value of the complementary integrated power supply in time comprises the following steps:

s4431) calculating the mismatching degree of the upper limit of the range, and sorting v in the possible fluctuation range sequence of the active power corresponding to the photovoltaic startup sequence₂The future T obtained by subtracting S4130 from the upper limit of the range of (1)₁The upper limit of the unit active power accommodation range of the clean energy power supply unit in time is judged, if the upper limit of the unit active power accommodation range is larger than 0, the degree of mismatching of the upper limit of the range is equal to the calculation result, and otherwise, the degree of mismatching of the upper limit of the range is equal to 0;

s4432) calculating the mismatching degree of the lower limit of the range, and comparing the future T obtained in S4130₁Sequencing v in a sequence of subtracting a possible fluctuation range of active power corresponding to the photovoltaic startup sequence from the lower limit of the unit active power accommodation range of the clean energy power supply unit in time₂If the lower limit is greater than 0, the lower limit mismatching degree of the range is equal to the calculation result, otherwise, the lower limit mismatching degree of the range is equal to 0;

s4433) subtracting the range lower limit mismatching degree obtained by S4432 from the range upper limit mismatching degree obtained by S4431 to obtain the sorting v in the possible active power fluctuation range sequence corresponding to the photovoltaic startup sequence₂Range and future T of₁And complementing the mismatch quantization value of the total active power set value of the integrated power supply within the time.

S4440) subtracting the absolute value of the quantization value of mismatch degree obtained in S4433 from the original quantization value variable of mismatch degree, and performing the following operations according to the calculation result:

s4441) if the calculation result is greater than or equal to the judgment threshold parameter set in S4210, v₂＝v₂+1 if v is present at this time₂If the difference is larger than the photovoltaic startup sequence length, jumping to the step S4450, otherwise, updating the original mismatching degree quantization value variable into the absolute value of the mismatching degree quantization value obtained in the step S4433, and jumping to the step SS4430 continues to execute;

s4442) if the calculation result is less than the judgment threshold parameter set in S4210, jumping to S4450 and continuing the execution.

S4450) according to the variable v₂Generates an operation recommendation, comprising:

s4451) if v₂If 1, no operation suggestion is generated;

s4452) if v₂If the number of the photovoltaic power-on sequences is more than 1, generating a power-on operation suggestion, and ranking 1 to v in the photovoltaic power-on sequence according to the suggestion₂The photovoltaic unit corresponding to the-1 executes the starting operation.

S4500) calculating charging and discharging correction power of the energy storage power supply unit:

s4510) calculating rated charge-discharge power of the energy storage power supply unit:

s4511) manually setting the proportional parameter w₁、w₂And a charge-discharge power variation dead zone;

s4512) calculating an ideal rated charge/discharge power of the energy storage power supply unit, where the ideal rated charge/discharge power is min

w₂Real unit active power value of x clean energy power supply unit]Wherein min 2]To find the minimum function, this step will be

And w₂The real unit active power value of the x clean energy power supply unit is simultaneously used as a constraint upper limit, the former is used for avoiding the charging and discharging power of the energy storage power supply from exceeding the actual charging and discharging requirements of the battery, and the latter is used for inhibiting the interference of the charging and discharging of the energy storage power supply battery on the stability of the real total active power value of the complementary integrated power supply;

s4513) setting the actual rated charge-discharge power according to the ideal rated charge-discharge power of the energy storage power supply unit obtained in the S4512, comparing the actual rated charge-discharge power of the energy storage power supply unit with the current-period ideal rated charge-discharge power according to a fixed period, keeping the actual rated charge-discharge power unchanged when the absolute value of the difference between the actual rated charge-discharge power and the current-period ideal rated charge-discharge power is smaller than the dead zone of charge-discharge power change set in the S4511, and otherwise updating the actual rated charge-discharge power to the current-period ideal rated charge-discharge power.

S4520) calculating a battery charging and discharging threshold value of the energy storage power supply unit, including:

s4521) when the total amount of the battery is in an extremely ideal electric quantity state, the charge and discharge threshold value is a very small negative number, so as to prevent the battery from being charged and discharged, and the charge and discharge threshold value is assumed to be-20 Hz in the embodiment;

s4522) when the total amount of the batteries is in a lower electric quantity state or a higher electric quantity state, the charging and discharging threshold value is 0;

s4523) when the total amount of the battery is in an extremely low power state or an extremely high power state, the charging/discharging threshold is β, β is a value from 0 to a primary frequency modulation threshold (schedule setting) of the complementary integrated power source, and β is assumed to be 0.02Hz in this embodiment;

s4524) when the total battery amount is in a more ideal electric quantity state, keeping the charging and discharging threshold value unchanged, making the more ideal state of the total battery amount become a buffer area with changed charging and discharging state to prevent the charging and discharging correction power from changing frequently, namely the charging and discharging threshold value of the more ideal electric quantity state is determined by the total electric quantity state of the previous battery, when the total battery amount is changed from an extremely ideal electric quantity state to the more ideal electric quantity state, the charging and discharging threshold value is-20 Hz, and when the total battery amount is changed from a lower electric quantity state or a higher electric quantity state to the more ideal electric quantity state, the charging and discharging threshold value is 0;

due to the fact that different charging and discharging thresholds are arranged, when the total charge capacity of the battery is in an extremely high or extremely low state, compared with the case that the total charge capacity of the battery is in a higher or lower state, the power grid carries out reverse compensation with higher priority on the battery capacity, and therefore the total charge capacity of the battery is restored to a shallow charging and shallow discharging state as soon as possible.

S4530) when the total capacity proportion r of the energy storage power source unit cell charge obtained in S2120 is less than 50%, the calculation step of the charging and discharging correction power comprises the following steps:

s4531) when the actual frequency of the power grid is less than or equal to the charge-discharge threshold value of the battery obtained by subtracting the S4520 from the rated frequency of the power grid, the charge-discharge correction power is 0;

s4532) when the actual frequency of the power grid is larger than the battery charging and discharging threshold value obtained by subtracting the S4520 from the rated frequency of the power grid, the charging and discharging correction power is the actual rated charging and discharging power obtained in the S4513.

Continuing with the example of S4520, when the total amount of batteries is less than 50% but in the ideal state of charge, when the actual frequency of the grid is greater than 50- (-20) to 70Hz, the battery charging is not actually performed, because the frequency of the grid operation cannot be greater than 70Hz, when the total amount of batteries is in the ideal state of charge, when the total amount of batteries is less than 50% and in the low state of charge, the battery charging is performed when the actual frequency of the grid is greater than 50-0 to 50Hz, when the total amount of batteries is less than 50% and in the very low state of charge, the battery charging is performed when the actual frequency of the grid is greater than 50-0.02 to 49.98Hz, and when the total amount of batteries is less than 50% and in the ideal state of charge, whether the battery charging is performed depends on the total state of charge of batteries as described above.

S4540) when the total capacity proportion r of the energy storage power source unit cell charge obtained in S2120 is larger than 50%, the calculation step of the charging and discharging correction power comprises the following steps:

s4541) when the actual frequency of the power grid is greater than or equal to the rated frequency of the power grid plus the charge and discharge threshold value of the battery obtained in the S4520, the charge and discharge correction power is 0;

s4542) when the actual frequency of the power grid is smaller than the rated frequency of the power grid plus the charge and discharge threshold value of the battery obtained in S4520, the charge and discharge correction power is a negative value of the actual rated charge and discharge power obtained in S4513.

Continuing with S4520 as an example, when the total amount of the battery is greater than 50% but in the ideal state of charge, when the actual frequency of the power grid is less than 50+ (-20) to 30Hz, the battery is not actually discharged when the total amount of the battery is in the ideal state of charge, when the total amount of the battery is greater than 50% and in the higher state of charge, the battery is discharged when the actual frequency of the power grid is less than 50+0 to 50Hz, when the total amount of the battery is greater than 50% and in the very high state of charge, the battery is discharged when the actual frequency of the power grid is less than 50+0.02 to 50.02Hz, and when the total amount of the battery is greater than 50% and in the more ideal state of charge, whether to discharge depends on the total state of charge of the previous battery as described above. Due to the fact that different charging and discharging thresholds are arranged, when the total amount of the batteries is in an extremely high or extremely low state, compared with the case that the total amount of the batteries is in a higher or lower state, the power grid carries out reverse compensation with higher priority on the electric quantity of the batteries, and therefore the total amount of the batteries is enabled to be restored to a shallow charging and shallow discharging state as soon as possible.

S4600) the complementary integration unit calculates a unit active power target value of the energy storage power supply unit, including:

s4610) adding the total active power set value of the complementary integrated power supply to the unit primary frequency modulation target regulating quantity of the clean energy power supply unit obtained in the step S3600, and then subtracting the unit active power actual value of the clean energy power supply unit to obtain the active power output deviation of the clean energy power supply unit;

s4620) setting the compensation adjustment amount according to the active power output deviation of the clean energy source power supply unit obtained in S4610, and comparing the compensation adjustment amount of the clean energy source power supply unit with the active power output deviation according to a fixed period, including:

s4621) when the absolute value of the difference value of the two is larger than the unit active power regulation dead zone of the energy storage power supply unit, the compensation regulation quantity of the energy storage power supply unit is equal to the active power output deviation of the current clean energy power supply unit;

s4622) when the absolute value of the difference value of the two is less than or equal to the unit active power regulation dead zone of the energy storage power supply unit, the compensation regulation amount of the energy storage power supply unit is kept unchanged.

S4630) dead band processing the compensation adjustment of the energy storage power supply unit, including:

s4631) manually setting the timer and the time parameter T₃；

S4632) when the absolute value of the active power output deviation of the clean energy power supply unit is less than or equal to the unit output dead zone of the clean energy power supply unit, the timer set in S4631 starts to time;

s4633) resetting and clearing a timer set in the S4631 when the absolute value of the active power output deviation of the clean energy power supply unit is larger than the unit output dead zone of the clean energy power supply unit;

s4634) when the timer time is less than the time parameter T₃Then, the compensation adjustment amount of the energy storage power supply unit after processing is equal to the compensation adjustment amount of the energy storage power supply unit obtained in step S4620;

s4635) when the timer time is greater than or equal to the time parameter T₃And then, the compensation adjustment quantity of the energy storage power supply unit after processing is equal to 0.

S4640) the unit active power target value of the energy storage power supply unit is equal to the charging and discharging correction power of the energy storage power supply unit obtained by subtracting the S4500 from the compensation adjustment quantity of the energy storage power supply unit obtained in S4630;

s4700) the energy storage power supply unit performs unit-level AGC distribution on the unit active power target value obtained by S4640 according to the S2000 method, and adjusts the active power of each energy storage unit.

Assuming that the total active power set value of the complementary integrated power supply is maintained at 300MW, the unit active power rated capacity of the energy storage power supply unit is ± 150MW, when 10s to 30s, since the battery needs to be charged and the grid frequency reaches the charging threshold, the charging and discharging correction power is 80MW, and the charging and discharging correction power is 0MW at other times, the adjusting effect of the complementary integrated power supply in the control model shown in fig. 4 is shown in fig. 5, and it can be easily seen from the figure:

1. the energy storage power supply has a good compensation effect on random fluctuation of output power caused by randomness and intermittence within a certain deviation degree (such as 0-120 s) of the clean energy power supply, and is beneficial to keeping the stability of the real value of the total active power of the complementary integrated power supply;

2. the charging and discharging of the 'clean energy and energy storage power supply' complementary integrated power supply for the energy storage power supply battery are carried out at the cost of deviation of the actual total active power value of the complementary integrated power supply, and the actual total active power value curve is recessed within 10-30 s;

3. limited by rated capacity and battery capacity, when the real active power value of the unit of the clean energy power supply deviates from the total active power set value of the complementary integrated power supply by a large margin (such as 160-200 s) or deviates from the total active power set value of the complementary integrated power supply for a long time, the auxiliary regulating action of the energy storage power supply is reduced by a large margin, which shows that the energy storage power supply can not play an obvious role in improving the peak-valley response performance of the clean energy power supply, and because the regulating resources of the energy storage power supply are consumed completely (reaching the regulating capacity upper limit), the compensation action of the energy storage power supply on the random fluctuation of the real active power value of the clean energy power supply disappears.

S4800) to further demonstrate the characteristics of "shallow charging and shallow discharging" of the energy storage power unit cells in the method of the present invention, the method further utilizes the control model shown in fig. 4 to perform simulation, wherein the control model sets 3 energy storage units in the energy storage power unit, the battery capacity ratio of the 3 energy storage units is 5:8:10, wherein the relationship diagrams of the total active power set value of the integrated power, the total active power actual value of the integrated power, the active power actual value of the clean energy unit, the active power actual value of each unit of the energy storage power unit, the battery charge state of each unit of the energy storage power unit, the battery charge capacity ratio of each unit of the energy storage power unit, the total battery charge capacity ratio of the energy storage power unit, the charging and discharging correction power of the energy storage power unit, etc. are respectively shown in fig. 6, and it can be seen from the adjustment effect of fig. 6 that:

1) the adjusting amplitude of the energy storage unit during active power adjustment is related to the battery capacity and the battery charge state, although the battery capacity of the energy storage unit 3 is twice that of the energy storage unit 1, the discharging amplitude of the energy storage unit 3 is smaller than that of the energy storage unit 1 on the contrary because the initial charge capacity proportion of the battery of the energy storage unit 3 is far lower than that of the energy storage unit 1;

2) because the clean energy unit has no regulating capacity, according to the method, the power grid frequency is considered when calculating the charging and discharging correction power, and the energy storage unit battery can enter a charging state only when the power grid frequency is higher than a certain specific value, otherwise, the energy storage unit battery can enter a discharging state only when the power grid frequency is lower than a certain specific value;

3) although there is a large difference in the battery charge capacity ratios of the 3 energy storage units artificially set in the initial stage of simulation, under the control of the "shallow charging and shallow discharging" strategy of the present invention, the capacity ratios of the battery charges of all the energy storage units gradually tend to be consistent, and meanwhile, as described above, the charging and discharging strategy of the present invention can maintain the total charge capacity of the unit cells of the energy storage units in a better balance, so the batteries of all the energy storage units are naturally in a more balanced state (neither overcharging nor overdischarging).

The embodiments given above are preferable examples for implementing the present invention, and the present invention is not limited to the above-described embodiments. Any non-essential addition and replacement made by the technical characteristics of the technical scheme of the invention by a person skilled in the art belong to the protection scope of the invention.

Claims

1. The utility model provides an active power control strategy of energy storage power supply and clean energy networking which characterized in that, carries out coordinated control to energy storage power supply, clean energy through complementary integrated power centralized control center:

the charging and discharging correction power is periodically updated by the energy storage power supply unit according to the ideal rated charging and discharging power, the battery capacity and the battery charging and discharging threshold, and is sent to the complementary integrated unit;

2. The active power control strategy for networking energy storage power supply and clean energy according to claim 1, wherein the parameters obtained by the complementary integration unit comprise:

s1100), parameters input by a complementary integration unit:

s1111) complementing the total active power set value of the integrated power supply;

s1112) the unit active power rated capacity, wherein the unit active power rated capacity of the clean energy power supply is equal to the sum of wind power which is generating and single machine active power rated capacity of the photovoltaic unit, and the unit active power rated capacity of the energy storage power supply is updated according to the rated capacity of each energy storage unit and the charge state of the battery;

s1113) real active power value of the unit, wherein the real active power value of the clean energy unit is equal to the sum of the real active power values of the units of the clean energy power supply unit, and the real active power value of the energy storage power supply unit is equal to the sum of the real active power values of the units of the energy storage power supply unit;

s1120) parameters sent by the energy storage power supply unit:

s1122) adjusting the unit active power dead zone of the energy storage power supply unit, wherein the unit active power dead zone is equal to the sum of the single-machine active power adjusting dead zones of the energy storage unit in operation;

s1130) parameters sent by the clean energy power supply unit:

s1131) the real unit active power value of the clean energy power supply unit is involved in the calculated quantity, and the clean energy power supply unit updates according to the real unit active power value and the dead zone of the output of each clean energy unit according to a fixed period;

s1132), the real unit active power value of the clean energy power supply unit is involved in the calculated value of the filtered value, and the clean energy power supply unit updates the real unit active power value, the scaling coefficient and the dead output area of each clean energy unit according to a fixed period;

s1134), a starting sequence and a stopping sequence of the clean energy power supply unit, and active power possible fluctuation range sequences respectively corresponding to the starting sequence and the stopping sequence;

s1135), the unit primary frequency modulation target regulating quantity of the clean energy power supply unit is equal to the sum of the wind power generated and the single-machine primary frequency modulation target regulating quantity of the photovoltaic unit.

3. The active power control strategy for networking an energy storage power supply and a clean energy source of claim 1, wherein the operation of the energy storage power supply unit comprises:

s2100) calculating the charge capacity ratio r of each energy storage unit of the energy storage power supply unit_iAnd the overall capacity ratio r of the energy storage power supply unit cell charge;

s2200) setting a judgment threshold R of the overall capacity proportion of the state of charge of the energy storage power supply unit cell₁’～R₆'; wherein, R is more than 0₁’＜R₂’＜R₃’＜R₄’＜R₅’＜R₆’＜1、R₁’+R₆’＝1、R₂’+R₅’＝1、R₃’+R₄’＝1；

S2300) judging the total electric quantity state of the battery of the energy storage power supply unit according to the judgment threshold;

s2400) setting judgment threshold R of battery state-of-charge capacity proportion of energy storage unit₁～R₄(ii) a Wherein, R is more than 0₁＜R₂＜R₃＜R₄＜1、R₁+R₄＝1、R₂+R₃＝1；

S2500) setting auxiliary calculation parameters of the adjustment coefficients of the energy storage units of the energy storage power supply unit: s2510) setting 4 threshold parameters K₁、K₂、K₃、K₄Wherein 0 < K₁＜K₂＜K₃＜K₄(ii) a S2520) setting a variation gradient parameter delta K of the regulating coefficient of the energy storage unit, wherein delta K is more than 0 and less than min₁,K₂－K₁,K₃－K₂,K₄－K₃]Wherein min 2]Setting delta K to obtain a minimum function so as to prevent the adjustment coefficient of the energy storage unit from changing too violently in the adjustment process;

s2600) calculating adjustment coefficients of all energy storage units of the energy storage power supply unit, including calculating upward adjustment coefficients of all energy storage units of the energy storage power supply unit and calculating downward adjustment coefficients of all energy storage units of the energy storage power supply unit;

s2700) unit active power target value of the energy storage power supply unit is subjected to unit-level AGC distribution:

s2720) when the unit active power target value of the energy storage power supply unit is greater than 0, distributing the single-machine active power set value of each energy storage unit according to the mutual proportion of the product of the upward adjustment coefficient of each energy storage unit and the battery capacity, and taking the forward single-machine active power rated capacity of each energy storage unit as the single-machine active power set value if the calculation result is greater than the forward single-machine active power rated capacity of each energy storage unit;

s2730) when the unit active power target value of the energy storage power supply unit is smaller than 0, distributing the single-machine active power set value of each energy storage unit according to the mutual proportion of the product of the downward adjustment coefficient and the battery capacity of each energy storage unit; if the calculation result is smaller than the negative single-machine active power rated capacity of the energy storage unit, taking the negative single-machine active power rated capacity of the energy storage unit as a single-machine active power set value;

s2800) controlling the active power of each energy storage unit of the energy storage power supply unit, wherein a single-machine active power set value is taken as a target, and a continuous signal is output to adjust the single-machine active power real value of the energy storage unit according to the deviation between the single-machine active power real value and the single-machine active power set value, so that the single-machine active power real value of the energy storage unit tends to the single-machine active power set value and is finally stabilized in the adjustment dead zone range of the single-machine active power set value.

4. The active power control strategy for networking the energy storage power supply and the clean energy source in claim 3, wherein the calculation of the parameters related to the energy storage power supply unit comprises:

s2100) capacity ratio r of battery charge of energy storage unit_iComprises the following steps:

in the formula r_iThe battery charge state capacity proportion of the energy storage unit i is obtained; SOC_iIs the battery charge state of the energy storage unit i,

and

respectively representing the maximum value and the minimum value of the battery charge of the energy storage unit i;

the overall capacity ratio r of the energy storage power supply unit battery charge is as follows:

the battery overall electric quantity state of the energy storage power supply unit is as follows:

s2310) when the overall capacity ratio of the charged energy storage power supply unit battery is more than or equal to 0 and less than R₁When the battery of the energy storage power supply unit is in an extremely low power state;

s2320) when R is present₁’≤r＜R₂When the battery of the energy storage power supply unit is in a lower state of charge;

s2330) when R is₂’≤r＜R₃' or R₄’＜r≤R₅When the battery is in a more ideal electric quantity state, the whole battery of the energy storage power supply unit is in a more ideal electric quantity state;

s2340) when R₃’≤r≤R₄When the battery of the energy storage power supply unit is in an extremely ideal electric quantity state;

s2350) when R is present₅’＜r≤R₆When the battery of the energy storage power supply unit is in a higher state of charge;

s2360) when R is₆When r is more than or equal to 1, the battery of the energy storage power supply unit is in an extremely high electric quantity state;

the regulating coefficient of each energy storage unit of the energy storage power supply unit comprises:

s2610) upward adjustment coefficients of each energy storage unit of the energy storage power supply unit:

In the formula

The upward adjustment coefficient of the energy storage unit i is obtained;

When r is more than or equal to 0_i＜R₁Time of flight

When R is₁≤r_i＜R₂Time of flight

When R is₂≤r_i≤R₃Time of flight

When R is₃＜r_i≤R₄Time of flight

When R is₄＜r_iWhen the temperature is less than or equal to 1

S2614) comparison

And

time of flight

time of flight

S2620) downward adjustment coefficients of each energy storage unit of the energy storage power supply unit:

In the formula

The downward adjustment coefficient of the energy storage unit i is obtained;

S2624) comparison

time of flight

time of flight

5. The active power control strategy of the energy storage power supply and clean energy networking according to claim 3, wherein the unit active power target value of the energy storage power supply unit is subjected to unit-level AGC distribution, and the method comprises the following operations:

s2720) when the unit active power target value of the energy storage power supply unit is greater than 0, the single-machine active power set value of the energy storage unit is equal to

In the formula

The unit active power target value of the energy storage power supply unit; if the calculation result is larger than the positive single-machine active power rated capacity of the energy storage unit, taking the positive single-machine active power rated capacity of the energy storage unit as a single-machine active power set value;

s2730) when the unit active power target value of the energy storage power supply unit is less than 0, the single-machine active power set value of the energy storage unit is equal to

If the calculation result is smaller than the negative single-machine active power rated capacity of the energy storage unit, taking the negative single-machine active power rated capacity of the energy storage unit as a single-machine active power set value;

the energy storage power supply unit also calculates the unit active power rated capacity of the energy storage power supply unit, and the method comprises the following steps:

s2910) calculating the upward adjusting capacity of each energy storage unit of the energy storage power supply unit:

s2911) when the energy storage unit is adjusted upwards, the effective threshold value parameter

s2912) when the upward adjustment of the energy storage unit takes effect the threshold value parameter

Then divided by K₂；

S2920) accumulating the upward adjusting energy of each energy storage unit to obtain the active power rated capacity of the forward unit of the energy storage power supply unit;

s2930) calculating the downward adjusting capacity of each energy storage unit of the energy storage power supply unit:

s2931) when the energy storage unit is adjusted downwards, the effective threshold value parameter is obtained _ik≥K₂Then, the downward regulating capacity of the unit is the negative single-machine active power rated capacity of the unit;

s2932) when the energy storage unit is adjusted downwards, the effective threshold value parameter is obtained _ik＜K₂The downward regulating capacity of the unit is the product of the negative single-machine active power rated capacity of the unit and the rated capacity _ikThen divided by K₂；

S2940) accumulating the downward regulating energy of each energy storage unit to obtain the negative direction unit active power rated capacity of the energy storage power supply unit.

6. The active power control strategy of networking an energy storage power source with clean energy according to claim 1, wherein the operation of the clean energy unit comprises:

s3100) generating future T for each clean energy unit₁The possible fluctuation range of the active power in time is calculated, and the possible fluctuation range of the unit active power of the clean energy power supply is calculated, wherein T₁The method is a parameter set for reserving sufficient time for possible startup and shutdown operations of the clean energy unit:

s3200) respectively generating a startup and shutdown sequence of the photovoltaic unit and the wind generating set:

s3210) respectively generating a shutdown sequence of the photovoltaic unit and the wind turbine unit for power generation, wherein the priority is calculated according to the duration of the unit in the power generation state, and the longer the duration of the unit in the power generation state is, the higher the priority is;

s3220) respectively generating a starting sequence of a photovoltaic unit and a wind turbine unit which are available and do not generate electricity, wherein the priority is calculated according to the duration of the unit in a non-electricity-generating state, and the longer the duration of the unit in the non-electricity-generating state is, the higher the priority is;

s3300) respectively generating possible active power fluctuation range sequences corresponding to the photovoltaic unit and wind turbine unit startup and shutdown sequences:

s3310) respectively generating possible fluctuation range sequences of active power corresponding to the starting sequence aiming at the photovoltaic unit and the wind generating unit;

s3320) respectively generating possible active power fluctuation range sequences corresponding to the shutdown sequences of the photovoltaic unit and the wind turbine unit;

s3400) calculating the real unit active power value parameter and the calculated quantity of the clean energy power supply unit;

s3500) calculating the unit active power actual value of the clean energy power supply unit and participating in the calculated value filtering:

s3600) calculating a unit primary frequency modulation target regulating quantity of the clean energy power supply unit:

s3610) calculating the frequency deviation of the power grid;

s3620) if the absolute value of the power grid frequency deviation is smaller than or equal to a given primary frequency modulation threshold, the unit primary frequency modulation target regulating quantity of the clean energy power supply unit is equal to 0;

s3630) if the absolute value of the grid frequency deviation is larger than a primary frequency modulation threshold, the unit primary frequency modulation target regulating quantity of the clean energy power supply unit is equal to the real active power value of the clean energy power supply unit multiplied by the grid frequency deviation multiplied by a given clean energy primary frequency modulation regulating coefficient.

7. The active power control strategy of the energy storage power supply and clean energy networking according to claim 6, wherein the operation of the clean energy unit is specifically as follows:

s3100) future T₁The possible fluctuation range of the active power over time is calculated as:

if the clean energy unit is provided with a power prediction system, the future T of each clean energy unit output by adopting the power prediction function₁The possible fluctuation range of the active power over time;

s3130) calculating a future T₁The unit active power of the clean energy power supply unit in time is within a possible fluctuation range: will be T in future₁Accumulating and summing the upper limits of possible fluctuation ranges of the active power of all the generator sets of the clean energy power supply unit within the time to serve as the upper limit of the possible fluctuation ranges; will be T in future₁Possible fluctuation range of active power of all generator sets of clean energy power supply unit within timeThe lower limit of (2) is accumulated and summed as the lower limit of the possible fluctuation range;

s3311) setting variable u₁，u₁Is 1;

s3314) sorting u in the possible fluctuation range sequence of the active power corresponding to the wind power or photovoltaic starting sequence₁Range of-1, plus sequence u in a wind or photovoltaic startup sequence₁The possible fluctuation range of the active power of the wind power or photovoltaic generator set is obtained, and the sequence u in the possible fluctuation range sequence of the active power corresponding to the wind power or photovoltaic startup sequence is obtained₁In which u is ordered₁Is equal to the rank u₁Upper limit of range of-1 plus sequence u in wind or photovoltaic startup sequence₁The upper limit of the possible fluctuation range of the active power of the unit is sorted u₁Is equal to the rank u₁Lower bound of the range of-1 plus the sequence u in the wind or photovoltaic boot sequence₁The lower limit of the possible fluctuation range of the active power of the unit;

s3321) setting variable u₂，u₂Is 1;

s3323) judgment of u₂Whether it is equal to the length of the wind or photovoltaic shutdown sequence, if u₂Equal to the length of the wind power or photovoltaic shutdown sequence, the step is terminatedStep S3320, otherwise perform u₂＝u₂+1, and then continuing to perform the subsequent steps;

s3400) calculating the real unit active power value of the clean energy power supply unit and participating in the calculated amount:

s3420) accumulating the output dead zones of all the units of the clean energy power supply unit to obtain the unit output dead zone of the clean energy power supply unit;

s3521) setting a scaling coefficient lambda, lambda is larger than 1;

s3522) the filtering threshold of the active power real emission value of the clean energy power supply unit is equal to the unit output dead zone multiplied by lambda;

s3532) if the absolute value of the difference value of the absolute value of the;

8. The active power control strategy of networking energy storage power supply and clean energy source according to claim 1, wherein the adjustment of the clean energy unit by the complementary integrated unit comprises:

s4100) calculating future T₁The unit active power accommodation range of the clean energy power supply unit in time comprises a unit active power accommodation range lower limit and a unit active power accommodation range upper limit;

s4200) calculating the matching degree of the total active power set value of the complementary integrated power supply and the on-off state of the clean energy power supply unit, and judging whether the on-off operation of the clean energy power supply unit is needed:

s4300) if the mismatch quantization value is larger than 0, searching an operation suggestion for stopping the wind turbine generator for generating power and searching an operation suggestion for stopping the photovoltaic generator for generating power;

s4400) if the mismatch degree quantization value is smaller than 0, searching an operation suggestion for starting up the available wind turbine generator without power generation and searching an operation suggestion for starting up the available photovoltaic turbine generator without power generation;

the adjustment of the energy storage power supply unit by the complementary integrated unit comprises the following steps:

s4510) regularly updating the actual rated charge-discharge power of the energy storage power supply unit according to the ideal rated charge-discharge power of the energy storage power supply unit;

s4520) setting a battery charging and discharging threshold value of the energy storage power supply unit;

s4530) calculating the charging and discharging correction power when the overall capacity proportion r of the unit battery charge is less than 50%;

s4540) calculating the charging and discharging correction power when the overall capacity proportion r of the unit battery charge is larger than 50%;

s4600) the calculating, by the complementary integration unit, the unit active power target value of the energy storage power supply unit includes:

s4610) adding the total active power set value of the complementary integrated power supply to the unit primary frequency modulation target regulating quantity of the clean energy power supply unit, and then subtracting the unit active power actual value of the clean energy power supply unit to obtain the active power output deviation of the clean energy power supply unit;

s4620) initializing the compensation adjustment quantity of the energy storage power supply unit to be set as the active power output deviation of the clean energy power supply unit, and then comparing the compensation adjustment quantity with the current active power output deviation according to a fixed period:

s4621) when the absolute value of the difference value of the two is larger than the unit active power regulation dead zone of the energy storage power supply unit, the compensation regulation quantity of the energy storage power supply unit is equal to the current active power output deviation;

s4622) when the absolute value of the difference value of the two is less than or equal to the unit active power regulation dead zone of the energy storage power supply unit, the compensation regulation quantity of the energy storage power supply unit is kept unchanged;

s4630) carrying out dead zone processing on the compensation adjustment quantity of the energy storage power supply unit;

s4640) the unit active power target value of the energy storage power supply unit is equal to the compensation adjustment quantity of the energy storage power supply unit subjected to dead zone processing minus the charging and discharging correction power of the energy storage power supply unit;

s4700) the complementary integration unit sends the unit active power target value to the energy storage power supply unit;

and the energy storage power supply unit performs unit-level AGC distribution on the obtained unit active power target value and adjusts the active power of each energy storage unit.

9. The active power control strategy of the energy storage power supply and clean energy networking according to claim 8, wherein the adjusting step of the clean energy unit by the complementary integration unit is specifically as follows:

s4100) calculating future T₁The unit active power accommodation range of the clean energy power supply unit in time is as follows:

s4110) calculating future T₁The lower limit of the unit active power accommodation range of the clean energy power supply unit at each time point in time is as follows:

s4111) if the power grid dispatching issues an active power plan curve of the complementary integrated power supply in advance, then T is carried out in the future₁Subtracting the energy storage power supply from the total active power set value of the complementary integrated power supply at each time point in timeThe forward unit active power rated capacity of the unit is obtained to obtain the future T₁The lower limit of the unit active power accommodation range of the clean energy power supply unit at each time point in time;

s4112) if the power grid dispatching does not issue the active power plan curve of the complementary integrated power supply in advance, subtracting the positive unit active power rated capacity of the energy storage power supply unit from the total active power set value of the current complementary integrated power supply to serve as the future T₁The lower limit of the unit active power accommodation range of the clean energy power supply unit at each time point in time;

s4120) calculating future T₁The upper limit of the unit active power accommodation range of the clean energy power supply unit at each time point in time is as follows:

s4121) if the power grid dispatching issues the active power plan curve of the complementary integrated power supply in advance, T will be sent in the future₁Subtracting the negative unit active power rated capacity of the energy storage power supply unit from the total active power set value of the complementary integrated power supply at each time point in time to obtain the future T₁The upper limit of the unit active power accommodation range of the clean energy power supply unit at each time point in time;

s4122) if the power grid dispatching does not issue the active power plan curve of the complementary integrated power supply in advance, subtracting the negative unit active power rated capacity of the energy storage power supply unit from the total active power set value of the current complementary integrated power supply to obtain the future T₁The upper limit of the unit active power accommodation range of the clean energy power supply unit at each time point in time;

s4130) future T₁The unit active power accommodation range of the clean energy power supply unit in time is T in the future₁Taking intersection of unit active power accommodation ranges of the clean energy power supply units at each time point in time;

s4210) setting a judgment threshold parameter for recommending start-up and shut-down operations;

s4220) calculating the current cleaningOn-off state and future T of net energy power supply unit₁The mismatch quantization value of the total active power set value of the complementary integrated power supply in time is as follows:

s4221) calculating the upper limit mismatching degree of the range and converting the future T into the future₁Subtracting the future T from the upper limit of the possible fluctuation range of the active power of the clean energy power supply unit within the time₁The upper limit of the unit active power accommodation range of the clean energy power supply unit in time is judged, if the upper limit of the unit active power accommodation range is larger than 0, the degree of mismatching of the upper limit of the range is equal to the calculation result, and otherwise, the degree of mismatching of the upper limit of the range is equal to 0;

s4222) calculating the lower limit mismatching degree of the range and converting the T into the future₁Subtracting future T from lower limit of unit active power accommodation range of clean energy power supply unit within time₁Judging the calculation result according to the lower limit of the possible fluctuation range of the active power of the clean energy power supply unit in time, wherein if the calculation result is larger than 0, the lower limit mismatching degree of the range is equal to the calculation result, and otherwise, the lower limit mismatching degree of the range is equal to 0;

s4223) subtracting the range lower limit mismatch from the range upper limit mismatch to obtain the starting and stopping state of the current clean energy power supply unit and the future T₁The mismatch degree quantization value of the total active power set value of the complementary integrated power supply in time;

s4230) comparing the absolute value of the mismatching degree quantization value with a judgment threshold parameter, if the absolute value is smaller than the judgment threshold parameter, terminating the step S4200, otherwise, performing the following steps to improve the on-off state and the future T of the clean energy power supply unit₁The matching degree of the total active power set value of the complementary integrated power supply in time is as follows:

s4231) if the mismatch degree quantization value is larger than 0, performing step S4300 to respectively find an operation suggestion for stopping the wind turbine generator and an operation suggestion for stopping the photovoltaic turbine generator;

s4232) if the mismatch degree quantization value is less than 0, performing step S4400 to respectively search an operation suggestion for starting the wind turbine generator which does not generate electricity and is available and an operation suggestion for starting the photovoltaic generator which does not generate electricity and is available;

s4300) finding an operation suggestion for stopping the wind turbine generator for generating power and finding an operation suggestion for stopping the photovoltaic turbine generator for generating power include:

s4310) setting variable v₁，v₁Is 1;

s4320) if v₁If the length of the shutdown sequence of the clean energy unit is less than or equal to the length of the shutdown sequence of the clean energy unit, setting an original mismatching degree quantization value variable, wherein the original mismatching degree quantization value variable is equal to the absolute value of the mismatching degree quantization value obtained in the step S4223, otherwise, skipping to the step S4350;

s4330) calculating the sequence v in the possible fluctuation range sequence of the active power corresponding to the shutdown sequence of the clean energy unit₁Range and future T of₁The mismatch quantization value of the total active power set value of the complementary integrated power supply in time is as follows: s4331) sorting v in the active power possible fluctuation range sequence corresponding to the shutdown sequence of the clean energy unit₁Upper range limit minus the future T₁The upper limit of the unit active power accommodation range of the clean energy power supply unit in time is judged, if the upper limit of the unit active power accommodation range is larger than 0, the degree of mismatching of the upper limit of the range is equal to the calculation result, and otherwise, the degree of mismatching of the upper limit of the range is equal to 0;

s4332) future T₁Sequencing v in a sequence of subtracting a possible fluctuation range of active power corresponding to a shutdown sequence of the clean energy unit from the lower limit of the unit active power accommodation range of the clean energy power supply unit within time₁If the lower limit is greater than 0, the lower limit mismatching degree of the range is equal to the calculation result, otherwise, the lower limit mismatching degree of the range is equal to 0;

s4333) subtracting the range lower limit mismatching degree obtained by S4332 from the range upper limit mismatching degree obtained by S4331 to obtain a sequence v in the possible active power fluctuation range sequence corresponding to the shutdown sequence of the clean energy unit₁Range and future T of₁The mismatch degree quantization value of the total active power set value of the complementary integrated power supply in time;

s4340) subtracting the absolute value of the quantization value of the mismatch degree obtained by the S4333 from the original quantization value variable of the mismatch degree, and performing the following operations according to the calculation result: s4341) if the calculation result is greater than or equal to the setting of S4210Judging the threshold parameter, then v₁＝v₁+1 if v is present at this time₁If the length of the sequence is larger than the length of the shutdown sequence of the clean energy unit, skipping to step S4350, otherwise, updating the original mismatching degree quantization value variable into the absolute value of the mismatching degree quantization value obtained in step S4333, and skipping to step S4330 to continue execution; s4342) if the calculation result is smaller than the judgment threshold parameter set in S4210, skipping to the step S4350 to continue execution;

s4350) according to the variable v₁Generates an operation recommendation:

s4351) if v₁If 1, no operation suggestion is generated;

s4352) if v₁If the sequence is more than 1, generating a shutdown operation suggestion, and sequencing 1 to v in the shutdown sequence of the clean energy unit₁-1, the clean energy unit corresponding to the unit executes shutdown operation;

s4400) finding an operation recommendation for starting up an available wind turbine generator and not generating electricity, and finding an operation recommendation for starting up an available photovoltaic turbine generator and not generating electricity are:

s4410) setting variable v₂，v₂Is 1;

s4420) if v₂If the length of the starting sequence of the clean energy unit is less than or equal to the length of the starting sequence of the clean energy unit, setting an original mismatching degree quantization value variable, wherein the original mismatching degree quantization value variable is equal to the absolute value of the mismatching degree quantization value obtained in the step S4223, and otherwise, skipping to the step S4450;

s4430) calculating a sequence v in the possible fluctuation range sequence of the active power corresponding to the starting sequence of the clean energy unit₂Range and future T of₁The mismatch quantization value of the total active power set value of the complementary integrated power supply in time is as follows:

s4431) sorting v in the active power possible fluctuation range sequence corresponding to the clean energy unit startup sequence₂The future T obtained by subtracting S4130 from the upper limit of the range of (1)₁The upper limit of the unit active power accommodation range of the clean energy power supply unit in time is judged, if the upper limit of the unit active power accommodation range is larger than 0, the degree of mismatching of the upper limit of the range is equal to the calculation result, and otherwise, the degree of mismatching of the upper limit of the range is equal to 0; s4432) future T₁Cleaning in timeSorting v in the sequence of subtracting the possible fluctuation range of the active power corresponding to the starting sequence of the clean energy unit from the lower limit of the unit active power accommodation range of the clean energy power supply unit₂If the lower limit is greater than 0, the lower limit mismatching degree of the range is equal to the calculation result, otherwise, the lower limit mismatching degree of the range is equal to 0;

s4433) subtracting the range lower limit mismatching degree obtained in S4432 from the range upper limit mismatching degree obtained in S4431 to obtain a sequence v in the possible active power fluctuation range sequence corresponding to the clean energy unit startup sequence₂Range and future T of₁The mismatch degree quantization value of the total active power set value of the complementary integrated power supply in time;

s4441) if the calculation result is greater than or equal to the judgment threshold parameter set in S4210, v₂＝v₂+1 if v is present at this time₂If the length of the starting sequence of the clean energy unit is larger than the length of the starting sequence of the clean energy unit, jumping to the step S4450, otherwise, updating the original mismatching degree quantization value variable into the absolute value of the mismatching degree quantization value obtained in the step S4433, and jumping to the step S4430 to continue execution;

s4442) if the calculation result is less than the judgment threshold parameter set in S4210, skipping to the step S4450 to continue to execute;

s4450) according to the variable v₂Generates an operation recommendation:

s4451) if v₂If 1, no operation suggestion is generated;

s4452) if v₂If the number of the clean energy units is more than 1, generating a starting operation suggestion, and sequencing 1 to v in a starting sequence of the clean energy units₂The clean energy unit corresponding to the-1 executes the starting operation.

10. The active power control strategy of the energy storage power supply and clean energy networking according to claim 8, wherein the calculating of the charging and discharging correction power of the energy storage power supply unit by the complementary integration unit is specifically as follows:

s4510) calculating the actual rated charging and discharging power of the energy storage power supply unit, including:

s4511) inputting a preset proportional parameter w₁、w₂And a charge-discharge power variation dead zone;

s4512) calculating ideal rated charge-discharge power of the energy storage power supply unit,

w₂real unit active power value of x clean energy power supply unit]Wherein min 2]To find a minimum function;

s4513) initially setting the actual rated charge-discharge power of the energy storage power supply unit as the ideal rated charge-discharge power, and comparing the actual rated charge-discharge power with the current ideal rated charge-discharge power according to a fixed period:

when the absolute value of the difference between the actual rated charge-discharge power and the preset charge-discharge power is smaller than the preset charge-discharge power change dead zone, the actual rated charge-discharge power is kept unchanged, otherwise, the actual rated charge-discharge power is updated to the current ideal rated charge-discharge power;

s4520) setting of the battery charging and discharging threshold value of the energy storage power supply unit as follows:

s4521) when the total amount of the battery is in an extremely ideal electric quantity state, the charge and discharge threshold value is a negative number, and the battery is prevented from being charged and discharged;

s4523) when the total amount of the batteries is in an extremely low electric quantity or an extremely high electric quantity state, the charging and discharging threshold value is beta, and the beta is a set parameter between 0 and a primary frequency modulation threshold of the complementary integrated power supply;

s4524) when the total amount of the battery is in a more ideal electric quantity state, keeping the original value of the charge and discharge threshold value unchanged;

s4530) calculating the charge-discharge correction power when the overall capacity ratio r of the unit cell charge is less than 50%:

s4531) when the actual frequency of the power grid is less than or equal to the rated frequency of the power grid minus the charging and discharging threshold value of the battery, the charging and discharging correction power is 0;

s4532) when the actual frequency of the power grid is greater than the nominal frequency of the power grid minus a battery charging and discharging threshold value, the charging and discharging corrected power is the actual nominal charging and discharging power;

s4540) calculating the charge-discharge correction power when the overall capacity ratio r of the unit cell charge is greater than 50%:

s4541) when the actual frequency of the power grid is greater than or equal to the rated frequency of the power grid plus a battery charging and discharging threshold value, the charging and discharging correction power is 0;

s4542) when the actual frequency of the power grid is smaller than the rated frequency of the power grid plus the charge and discharge threshold value of the battery, the charge and discharge correction power is a negative value of the actual rated charge and discharge power obtained in S4513;

the complementary integrated unit specifically processes the compensation adjustment amount dead zone as follows:

s4631) setting the timer and the time parameter T₃；

S4632) when the absolute value of the active power output deviation of the clean energy power supply unit is less than or equal to the unit output dead zone of the clean energy power supply unit, starting timing by a timer;

s4633) resetting and clearing the timer when the absolute value of the active power output deviation of the clean energy power supply unit is larger than the unit output dead zone of the clean energy power supply unit;

s4634) when the timer time is less than the time parameter T₃Then, the compensation adjustment amount of the energy storage power supply unit is equal to the compensation adjustment amount of the energy storage power supply unit obtained in step S4620;

s4635) when the timer time is greater than or equal to the time parameter T₃And meanwhile, the compensation adjustment quantity of the energy storage power supply unit is equal to 0.