CN111509783B - Multi-type energy integrated cooperative control method and device - Google Patents
Multi-type energy integrated cooperative control method and device Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
- H02J3/472—For selectively connecting the AC sources in a particular order, e.g. sequential, alternating or subsets of sources
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The application discloses a multi-type energy integrated cooperative control method, which comprises the following steps: obtaining a first quantity to be regulated according to the whole network load increment of the power grid and the pre-filtered regional control deviation; the hydroelectric generating set is utilized to carry out frequency modulation on the first quantity to be modulated to obtain a second quantity to be modulated; taking the wind power prediction increment, the photoelectric prediction increment and the interconnecting line prediction increment into consideration on the basis of the second amount to be regulated to obtain a third amount to be regulated; judging the section type of the unit, and adjusting the third to-be-adjusted quantity according to a preset section strategy, a preset frequency protection strategy and a preset hydropower standby protection strategy to obtain a residual to-be-adjusted quantity; and finishing the adjustment of the residual quantity to be adjusted by the thermal power generating unit. The application also discloses a cooperative control device based on the method. The application realizes the coordination control of the water-fire unit based on the load prediction trend, the new energy power prediction trend, the frequency emergency degree and the standby protection, and improves the frequency stability of the whole network.
Description
Technical Field
The application relates to automatic scheduling of a power system, in particular to a multi-type energy integrated cooperative control method and device.
Background
With the development of power grid technology, the installed capacity of various power supplies is continuously increased. The same ratio of the renewable energy source power generation installation is increased by 11.7 to 72896 kilowatts, and the renewable energy source power generation installation accounts for 63.8 percent of the newly-added power generation installation. Notably, the new wind power and solar energy installation machine accounts for 85% of the new renewable energy installation machine. In renewable energy power generation, the hydropower ratio decreases year by year. Due to the lack of unified planning with the traditional energy sources, the utilization rate of a plurality of energy sources is not high, and the problems of resource waste and the like are caused.
The application patent application with publication number of CN102522781A and publication date of 20120627 discloses a method for uniformly modeling wind and fire to participate in ACE control, a wind power plant control object is modeled similarly according to the characteristics of a conventional thermal power generating unit, wind power plants and fire motor components are divided into different control groups according to different power generation types, different sequencing strategies can be designed between groups and in groups, and the wind power plants and the conventional thermal power generating unit are jointly participated in regulation. However, the section type of the technical scheme of the patent is poor in applicability, and the conventional energy source spin-on condition is not considered, so that overload of the conventional energy source unit can be caused.
Disclosure of Invention
The application aims to: the application aims to provide a multi-type energy integrated cooperative control method and device, which are used for solving the defects that the conventional method is difficult to be applied to various sections and is easy to cause overload of a conventional unit.
The technical scheme is as follows: the application provides a multi-type energy integrated cooperative control method, which comprises the following steps:
(1) Obtaining a first quantity to be regulated according to the whole network load increment of the power grid and the area control deviation of the pre-filtering;
(2) The hydroelectric generating set is utilized to carry out frequency modulation on the first quantity to be modulated to obtain a second quantity to be modulated;
(3) Obtaining a third quantity to be regulated according to the second quantity to be regulated, the wind power prediction increment, the photoelectric prediction increment and the interconnecting line prediction increment;
(4) Judging the section type of the unit, and adjusting the third to-be-adjusted quantity by the unit under the section according to a preset section strategy, a preset frequency protection strategy and a preset hydropower standby protection strategy to obtain a residual to-be-adjusted quantity;
(5) And finishing the adjustment of the residual quantity to be adjusted by the thermal power generating unit.
Further, the first amount to be adjusted is expressed as:
P total_reg1 ＝P load -ACE fil
wherein P is total_reg1 For the first to-be-adjusted quantity, P load ACE for full network load increment fil Controlling the deviation for the pre-filtered region;
prefiltered area control offset ACE fil Expressed as:
ACE fil ＝ACE fil，k+1 ＝(1-α)*ACE fil，k+1 +α*ACE fil，k+1
wherein alpha is a filter factor, ACE fil，k+1 Controlling a deviation ACE value for a region after k times of filtering, wherein k is preset filtering times;
third amount to be adjusted P total_reg3 Expressed as:
P total_reg3 ＝P total_reg2 +ΔP wind +ΔP pv +ΔP line
wherein DeltaP wind Delta P for wind power prediction pv Delta P is the photoelectric prediction delta line The delta is predicted for the tie line.
Further, the section types include a conventional energy section and a multi-energy mixed section;
if only a conventional unit is operated under the current section, judging that the current section is a conventional energy section; the conventional unit comprises a water motor unit and a thermal power unit;
if the current section is provided with a new energy unit in addition to the conventional unit, judging that the current section is a multi-energy mixed section; the new energy unit comprises a wind turbine generator and a photoelectric unit.
Further, the conventional energy section and the multi-energy mixed section can be divided into a normal area, a help area, an emergency area and an out-of-limit area according to the load rate;
the normal area is a section with the load rate not reaching 85%; the help area is a section with a load rate reaching 85% but not 95%; the emergency area is a section with the load rate reaching 95% but not reaching 100%; the out-of-limit area is a section with the load rate reaching or exceeding 100 percent.
Further, conventional profile control strategies include:
for the section in the help area, the high-sensitivity unit under the section is set to be up-locked, and the power up-regulation is not participated;
for the section in the emergency area, all units under the section are upwards locked, and the power rising regulation is not participated; the high-sensitivity unit is preferentially adjusted towards the direction of the recovery section;
and for the section in the out-of-limit area, lifting and locking all units under the section, and adjusting all units in the section recovery direction without participating in lifting power adjustment.
Further, the multi-energy hybrid profile control strategy includes:
for the section in the normal area, the conventional unit is regulated normally, and the new energy unit is regulated according to peak regulation and section control instructions;
for the section in the help area, the conventional unit is adjusted towards the section recovery direction, and the adjustment of the new energy unit measures the minimum value of the current output, peak regulation and section control instructions;
for the section in the emergency area, the conventional unit is adjusted towards the section recovery direction, and if the conventional unit is fully used, the adjustment of the new energy unit measures the minimum value of the current output, peak regulation and section control instructions; otherwise, the new energy unit is regulated to the section recovery direction;
for the section in the out-of-limit area, all units are adjusted towards the section recovery direction.
Further, the frequency protection strategy when the surface regulating unit is interrupted in the step (4) comprises the following steps:
(41) Under the condition of considering a hydropower standby protection strategy, the third quantity to be regulated is regulated through a hydropower unit, and a fourth quantity to be regulated is obtained;
(42) The thermal power generating unit adjusts the fourth to-be-adjusted quantity according to the load trend in the spin-standby range of the thermal power generating unit to obtain a fifth to-be-adjusted quantity;
(43) If the section is a conventional energy section, the fifth to-be-adjusted quantity is the residual to-be-adjusted quantity;
if the section is a multi-energy mixed section, the new energy unit is enabled to adjust the fifth to-be-adjusted quantity within the adjusting quantity range, and the remaining to-be-adjusted quantity is obtained.
Further, the hydropower backup protection strategy includes:
judging the load trend, wherein the load trend comprises climbing, descending and stabilizing;
if the load trend is climbing:
if the reserve of the hydroelectric generating set is greater than 70% of the reserve, the increase force of the hydroelectric generating set is increased to 70% of the reserve, and the reserve standby adjustment delta P of the hydroelectric is obtained Water and its preparation method ；
Otherwise, the hydroelectric generating set reduces the output to 70% of the rotation standby to obtain the standby adjustment quantity delta P of the hydroelectric power Water and its preparation method ；
If the load trend is downhill:
if the reserve under the hydroelectric generating set is greater than 70% of the reserve, the hydroelectric generating set reduces the output to 70% of the reserve, and the standby adjustment delta P of the hydroelectric is obtained Water and its preparation method ；
Otherwise, the hydropower unit increases the forceThe hydropower unit increases the output to 70% of the rotation standby power to obtain the standby power delta P Water and its preparation method ；
If the load trend is stable, 50% spin-back is maintained.
Further, step (42) includes:
judging the load trend, wherein the load trend comprises climbing, descending and stabilizing;
when the load climbs a slope:
the frequency is lower than 49.94 or higher than 50.08, and the thermal power unit is regulated towards the frequency recovery direction;
the frequency is between 49.94 and 49.96 and 50.06 and 50.08, and the thermal power generating unit does not allow the deterioration frequency;
when the load is downhill:
the frequency is lower than 49.92 or higher than 50.06, and the thermal power unit is regulated towards the frequency recovery direction;
the frequency is between 49.92 and 49.94 and 50.04 and 50.06, and the thermal power generating unit does not allow the deterioration frequency;
when the load is stable:
and executing a load rate balancing strategy by the thermal power generating unit, namely adjusting the load rate in a fair load rate direction.
The application also discloses a multi-type energy integrated cooperative control device, which comprises:
the first quantity to be adjusted determining module is configured to obtain a first quantity to be adjusted according to the whole network load increment of the power grid and the pre-filtered regional control deviation;
the second to-be-adjusted quantity determining module is configured to obtain a second to-be-adjusted quantity after the hydroelectric generating set is used for carrying out frequency modulation on the first to-be-adjusted quantity;
the third to-be-adjusted quantity determining module is used for obtaining a third to-be-adjusted quantity according to the second to-be-adjusted quantity, the wind power prediction increment, the photoelectric prediction increment and the interconnecting line prediction increment;
the strategy adjusting module is configured to judge the section type of the unit, and adjust the third to-be-adjusted quantity by the unit under the section according to a preset section strategy, a preset frequency protection strategy and a preset hydropower standby protection strategy to obtain the remaining to-be-adjusted quantity;
the remaining amount to be adjusted adjusting module is configured to complete adjustment of the remaining amount to be adjusted by the thermal power generating unit.
The beneficial effects are that: compared with the prior art, the method and the device can realize the coordinated control of the water-fire unit based on the load prediction trend, the new energy power prediction trend, the frequency emergency degree and the standby protection, and improve the frequency stability of the whole network; the advanced control based on planning and prediction is more prospective than the control based on real-time data, so that the round-trip adjustment frequency of the unit can be effectively reduced, and the adjustment efficiency is improved.
Drawings
FIG. 1 is a flow chart of a cooperative control method of the present application;
FIG. 2 is a flow chart of a frequency protection strategy in the cooperative control method of the present application;
FIG. 3 is a flow chart of a hydro-electric standby protection strategy in the collaborative method of the present application;
fig. 4 is a system block diagram of a cooperative control apparatus for the present situation.
Detailed Description
The application is further described below with reference to the accompanying drawings and examples:
the application provides a multi-type energy integrated cooperative control method, as shown in figure 1, comprising the following steps:
s101, obtaining a first quantity to be regulated according to the whole network load increment of the power grid and the pre-filtered regional control deviation and the following formula:
P total_reg1 ＝P load -ACE fil
wherein P is total_reg1 For the first to-be-adjusted quantity, P load ACE for full network load increment fil Controlling the deviation for the pre-filtered region; full network load delta P load Can be obtained by calculating the difference between the planned load and the current load.
The pre-filtered area control bias is expressed as:
ACE fil ＝ACE fil，k+1 ＝(1-α)*ACE fil，k+1 +α*ACE fil，k+1
wherein alpha is a filter factor, ACE fil，k+1 For k timesThe post-region control deviation ACE value, k is the preset filtering times.
S102, performing frequency modulation on the first to-be-modulated quantity by utilizing the hydroelectric generating set to obtain a second to-be-modulated quantity P total_reg2 The method comprises the steps of carrying out a first treatment on the surface of the Specifically, the upper limit of the output of the hydroelectric generating set is set capacity, and the adjustment quantity of the hydroelectric generating set is recorded as delta P 1 Then
P total_reg2 ＝P total_reg1 -ΔP 1
S103, obtaining a third amount P to be adjusted according to the second amount to be adjusted, the wind power prediction increment, the photoelectric prediction increment and the interconnection line prediction increment total_reg3 The method specifically comprises the following steps:
P total_reg3 ＝P total_reg2 +ΔP wind +ΔP pv +ΔP line
wherein DeltaP wind Delta P for wind power prediction pv Delta P is the photoelectric prediction delta line Predicting an increment for the tie line; ΔP wind 、ΔP pv 、ΔP line Can be obtained by calculating the difference between the planned value and the current value.
S104, judging the section type of the unit, and adjusting the third to-be-adjusted quantity by the unit under the section according to a preset section strategy, a preset frequency protection strategy and a preset hydropower standby protection strategy to obtain the remaining to-be-adjusted quantity.
In particular, the method comprises the steps of,
the section type comprises a conventional energy section and a multi-energy mixed section;
if only a conventional unit is operated under the current section, judging that the current section is a conventional energy section; the conventional unit comprises a water motor unit and a thermal power unit;
if the current section is provided with a new energy unit in addition to the conventional unit, judging that the current section is a multi-energy mixed section; the new energy unit comprises a wind turbine generator and a photoelectric unit.
The conventional energy section and the multi-energy mixed section can be divided into a normal area, a help area, an emergency area and an out-of-limit area according to the load rate;
the normal area is a section with the load rate not reaching 85%; the help area is a section with a load rate reaching 85% but not 95%; the emergency area is a section with the load rate reaching 95% but not reaching 100%; the out-of-limit area is a section with the load rate reaching or exceeding 100 percent.
For a conventional profile, the conventional profile control strategy is shown in table 1, comprising:
TABLE 1
| Load factor | Section area | High sensitivity | Low sensitivity |
| More than 85% | Normal zone | ↓→↑ | ↓→↑ |
| Between 85% and 95% | Help area | ↓→ | ↓→↑ |
| Between 95% and 100% | Emergency region | Priority ≡ | ↓→ |
| More than or equal to 100 percent | Out-of-limit region | ↓ | ↓ |
For the section in the normal area, the hydroelectric generating set normally rises and falls, and the section does not regulate the generating set;
for the section in the help area, the section does not actively adjust the unit, the high-sensitivity unit does not allow the deterioration of the section, the high-sensitivity unit under the section is locked up, the power rise adjustment is not participated, the power fall is normal, and the section out-of-limit is avoided; the unit with weak sensitivity is not limited;
for the section in the emergency area, the section does not actively regulate the units, all units are not allowed to deteriorate the section, all units below the section are locked up in a rising way, the power rising regulation is not participated, and the power falling normal regulation is not performed; the high-sensitivity unit is preferentially adjusted towards the direction of the recovery section;
for the section in the out-of-limit area, all units under the section are upwards locked, the power rising adjustment is not participated, and all units are adjusted towards the restoration direction of the section; and sequencing the units which can participate in regulation under the section according to the load rate, and sequentially downwards regulating the units with the front sequencing by one step length until the section active power is restored to be within the limit value.
In this embodiment, the definition of the rising latch is as follows:
under the condition of ensuring the safety of water level and sufficient reserve up and down climbing/descending slope, the water power is regulated by taking the capacity of 5% as step length. Collecting upstream water level Z of hydropower in real time U And downstream water level Z L Respectively judging whether the difference value is larger than a limit value Z S Whether the upstream water level is higher than the highest limit water level Z MAX Whether the downstream water level is below a minimum limit level Z MIN 。
When one of the following conditions is satisfied, the unit is judged to be up-locked:
Z U -Z L ＜＝Z S
Z L ＜Z MIN
when the following conditions are satisfied, the unit is judged to be in descending locking:
Z U ＞Z MAX and Z is U -Z L ＞Z S
The rising locking mode can not send out an increasing force command to the unit; the descent lock mode cannot issue a force-reducing command to the unit.
For a multi-energy hybrid profile, the multi-energy hybrid profile control strategy includes:
for the section in the normal area, the conventional unit is regulated normally, and the new energy unit is regulated according to peak regulation and section control instructions;
for the section in the help area, the conventional unit is adjusted towards the section recovery direction, and the adjustment of the new energy unit measures the minimum value of the current output, peak regulation and section control instructions;
for the section in the emergency area, the conventional unit is adjusted towards the section recovery direction, and if the conventional unit is fully used, the adjustment of the new energy unit measures the minimum value of the current output, peak regulation and section control instructions; otherwise, the new energy unit is regulated to the section recovery direction;
for the section in the out-of-limit area, all units are adjusted towards the section recovery direction.
The combination of the frequency protection strategy and the hydropower protection strategy is embodied by the following steps:
(41) And under the condition of considering the standby protection strategy of the hydropower, the third amount to be regulated is regulated through the hydropower unit, and the fourth amount to be regulated is obtained.
Specifically, the hydropower backup protection strategy includes:
judging the load trend, wherein the load trend comprises climbing, descending and stabilizing;
if the load trend is climbing:
if the reserve of the hydroelectric generating set is greater than 70% of the reserve, the increase force of the hydroelectric generating set is increased to 70% of the reserve, and the reserve standby adjustment delta P of the hydroelectric is obtained Water and its preparation method ；
Otherwise, the hydroelectric generating set reduces the output to 70% of the rotation standby to obtain the standby adjustment quantity delta P of the hydroelectric power Water and its preparation method ；
If the load trend is downhill:
if the reserve under the hydroelectric generating set is greater than 70% of the reserve, the hydroelectric generating set reduces the output to 70% of the reserve, and the standby adjustment delta P of the hydroelectric is obtained Water and its preparation method ；
Otherwise, the hydropower unit increases the output of the hydropower unit to 70% of the rotational preparation to obtain the standby adjustment quantity delta P of the hydropower Water and its preparation method ；
If the load trend is stable, 50% spin-back is maintained.
(42) And adjusting the fourth to-be-adjusted quantity according to the load trend in the spinning preparation range of the thermal power unit to obtain a fifth to-be-adjusted quantity.
Specifically, the load trend is judged, wherein the load trend comprises climbing, descending and stabilizing;
when the load climbs a slope:
the frequency is lower than 49.94 or higher than 50.08, and the thermal power unit is regulated towards the frequency recovery direction;
the frequency is between 49.94 and 49.96 and 50.06 and 50.08, and the thermal power generating unit does not allow the deterioration frequency;
when the load is downhill:
the frequency is lower than 49.92 or higher than 50.06, and the thermal power unit is regulated towards the frequency recovery direction;
the frequency is between 49.92 and 49.94 and 50.04 and 50.06, and the thermal power generating unit does not allow the deterioration frequency;
when the load is stable:
and executing a load rate balancing strategy by the thermal power generating unit, namely adjusting the load rate in a fair load rate direction.
(43) If the section is the conventional energy section, the fifth amount to be adjusted is the remaining amount to be adjusted.
If the section is a multi-energy mixed section, the new energy unit is enabled to adjust the fifth to-be-adjusted quantity within the adjusting quantity range, and the remaining to-be-adjusted quantity is obtained.
Specifically, the adjustment amount of the new energy unit is determined by:
and the wind turbine generator system and the photoelectric turbine generator system take smaller values of a section control instruction and a predicted increment adjustment instruction according to the respective power generation prediction trend by 1% of capacity increase and decrease.
P send ＝min{P+P dp,1min ,P-P dp,1min ,P sec }
P dp,1min ＝(P wind -P wind,1min )*θ wind +(P pv -P pv,1min )*θ pv
Wherein P is dp,1min For future 1 minute increments, P wind Predicting current value for wind power, P pv To predict the current value, P wind,1min P is a wind power ultra-short period 1 minute predictive value pv,1min Is a photoelectric ultra-short term 1 minute predictive value, theta wind For wind power weight value, θ pv The wind and photoelectric weight values are preset according to the importance duty ratio, and P sec Is a section control instruction, P send For wind/light final command, P is current wind/light output, P+P dp,1min ＝P tmp P at this time tmp The regulating variable is P-P when wind power climbs dp,1min ＝P tmp P at this time tmp Is the adjustment quantity when wind power descends.
S105, the thermal power generating unit completes the adjustment of the residual quantity to be adjusted.
The application also provides a multi-type energy integrated cooperative control device based on the method, which comprises the following steps:
the first amount to be adjusted determining module 401 is configured to obtain a first amount to be adjusted according to the whole network load increment of the power grid and the pre-filtered area control deviation according to the following formula:
P total_reg1 ＝P load -ACE fil
wherein P is total_reg1 For the first to-be-adjusted quantity, P load ACE for full network load increment fil Controlling the deviation for the pre-filtered region; full network load delta P load Can be obtained by calculating the difference between the planned load and the current load.
A second adjustment waiting amount determining module 402 configured to obtain a second adjustment waiting amount P after performing frequency modulation on the first adjustment waiting amount by using the hydroelectric generating set total_reg2 ；
Specifically, the upper limit of the output of the hydroelectric generating set is set capacity, and the adjustment quantity of the hydroelectric generating set is recorded as delta P 1 Then
P total_reg2 ＝P total_reg1 -ΔP 1
A third adjustment waiting amount determining module 403 configured to obtain a third adjustment waiting amount P according to the second adjustment waiting amount, the wind power prediction increment, the photoelectric prediction increment and the link prediction increment total_reg3 The method specifically comprises the following steps:
P total_reg3 ＝P total_reg2 +ΔP wind +ΔP pv +ΔP line
wherein DeltaP wind Delta P for wind power prediction pv Delta P is the photoelectric prediction delta line Predicting an increment for the tie line; ΔP wind 、ΔP pv 、ΔP line Can be obtained by calculating the difference between the planned value and the current value.
The policy adjustment module 404 is configured to determine a section type where the unit is located, and adjust the third amount to be adjusted by the unit under the section according to a preset section policy, a frequency protection policy and a hydropower standby protection policy, so as to obtain a remaining amount to be adjusted.
The remaining amount to be adjusted adjusting module 405 is configured to complete the adjustment of the remaining amount to be adjusted by the thermal power generating unit.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Claims (7)
1. The integrated cooperative control method for the multiple types of energy sources is characterized by comprising the following steps of:
(1) Obtaining a first quantity to be regulated according to the whole network load increment of the power grid and the area control deviation of the pre-filtering;
(2) The hydroelectric generating set is utilized to carry out frequency modulation on the first quantity to be modulated to obtain a second quantity to be modulated;
(3) Obtaining a third quantity to be regulated according to the second quantity to be regulated, the wind power prediction increment, the photoelectric prediction increment and the interconnection line prediction increment;
(4) Judging the section type of the unit, and adjusting the third to-be-adjusted quantity by the unit under the section according to a preset section strategy, a preset frequency protection strategy and a preset hydropower standby protection strategy to obtain a residual to-be-adjusted quantity;
the section strategy is as follows: dividing a section into a normal area, a help area, an emergency area and an out-of-limit area according to the section load rate;
for a conventional energy section in a help area, the high-sensitivity unit under the section is upwards locked, and the power rising regulation is not participated;
for a conventional energy section in an emergency area, all units under the section are upwards locked, and the power rising regulation is not participated; the high-sensitivity unit is preferentially adjusted towards the direction of the recovery section;
for a conventional energy section in an out-of-limit area, lifting and locking all units below the section, and adjusting all units in the section recovery direction without participating in lifting power adjustment;
for the multi-energy mixed section in the normal area, the conventional unit is regulated normally, and the new energy unit is regulated according to peak regulation and section control instructions;
for the multi-energy mixed section in the help area, the conventional unit is adjusted towards the section recovery direction, and the adjustment of the new energy unit measures the minimum value of the current output, peak regulation and section control instructions;
for the multi-energy mixed section in the emergency area, the conventional unit is adjusted towards the section recovery direction, and if the conventional unit is fully reserved, the adjustment of the new energy unit measures the minimum value of the current output, peak regulation and section control instructions; otherwise, the new energy unit is regulated to the section recovery direction;
for the multi-energy mixed section in the out-of-limit area, all units are adjusted towards the section recovery direction;
the frequency protection strategy when the section is adjusted comprises the following steps:
(41) Under the condition of considering the hydropower standby protection strategy, the third quantity to be regulated is regulated through a hydropower unit, so as to obtain a fourth quantity to be regulated;
(42) The thermal power generating unit adjusts the fourth to-be-adjusted quantity according to the load trend in the spin-standby range of the thermal power generating unit to obtain a fifth to-be-adjusted quantity;
(43) If the section is a conventional energy section, the fifth to-be-adjusted quantity is the residual to-be-adjusted quantity;
if the section is a multi-energy mixed section, the new energy unit is enabled to adjust the fifth to-be-adjusted quantity within the adjustment quantity range of the new energy unit, and the remaining to-be-adjusted quantity is obtained;
the frequency protection strategy is: the thermal power generating unit is regulated according to the load trend, the sufficient reserve and the 70% reserve are ensured when climbing, the sufficient reserve and the 70% reserve are ensured when descending, and the 50% reserve are ensured when stabilizing;
(5) And finishing the adjustment of the residual quantity to be adjusted by the thermal power generating unit.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
the first amount to be adjusted is expressed as:
P total_reg1 ＝P load -ACE fil
wherein P is total_reg1 For the first to-be-adjusted quantity, P load ACE for full network load increment fil Controlling the deviation for the pre-filtered region;
the pre-filtered area control offset ACE fil Expressed as:
ACE fil ＝ACE fil，k+1 ＝(1-α)*ACE fil，k+1 +α*ACE fil，k+1
wherein alpha is a filter factor, ACE fil，k+1 Controlling a deviation ACE value for a region after k times of filtering, wherein k is preset filtering times;
the third amount to be adjusted P total_reg3 Expressed as:
P total_reg3 ＝P total_reg2 +ΔP wind +ΔP pv +ΔP line
wherein DeltaP wind Delta P for wind power prediction pv Delta P is the photoelectric prediction delta line The delta is predicted for the tie line.
3. The method of claim 1, wherein the profile types include a conventional energy profile and a multi-energy hybrid profile;
if only a conventional unit is operated under the current section, judging that the current section is the conventional energy section; the conventional unit comprises a hydroelectric unit and a thermal power unit;
if the current section is provided with a new energy unit in addition to the conventional unit, judging that the current section is a multi-energy mixed section; the new energy unit comprises a wind turbine generator and a photoelectric unit.
4. A method according to claim 3, wherein the conventional energy section and the multi-energy mixing section are each divided into a normal zone, a help zone, an emergency zone and an out-of-limit zone according to load rates;
the normal area is a section with the load rate not reaching 85%; the help area is a section with a load rate reaching 85% but not 95%; the emergency area is a section with the load rate reaching 95% but not reaching 100%; the out-of-limit area is a section with the load rate reaching or exceeding 100%.
5. The method of claim 1, wherein the hydropower backup protection strategy comprises:
judging the load trend, wherein the load trend comprises climbing, descending and stabilizing;
if the load trend is climbing:
if the reserve of the hydroelectric generating set is greater than 70% of the reserve, the increase force of the hydroelectric generating set is increased to 70% of the reserve, and the reserve standby adjustment delta P of the hydroelectric is obtained Water and its preparation method ；
Otherwise, the hydroelectric generating set reduces the output to 70% of the rotation standby to obtain the standby adjustment quantity delta P of the hydroelectric power Water and its preparation method ；
If the load trend is downhill:
if the reserve under the hydroelectric generating set is greater than 70% of the reserve, the hydroelectric generating set reduces the output to 70% of the reserve, and the standby adjustment delta P of the hydroelectric is obtained Water and its preparation method ；
Otherwise, the hydropower unit increases the output of the hydropower unit to 70% of the rotational preparation to obtain the standby adjustment quantity delta P of the hydropower Water and its preparation method ；
If the load trend is stable, 50% spin-back is maintained.
6. The method of claim 1, wherein step (42) comprises:
judging the load trend, wherein the load trend comprises climbing, descending and stabilizing;
when the load climbs a slope:
the frequency is lower than 49.94 or higher than 50.08, and the thermal power unit is regulated towards the frequency recovery direction;
the frequency is between 49.94 and 49.96 and 50.06 and 50.08, and the thermal power generating unit does not allow the deterioration frequency;
when the load is downhill:
the frequency is lower than 49.92 or higher than 50.06, and the thermal power unit is regulated towards the frequency recovery direction;
the frequency is between 49.92 and 49.94 and 50.04 and 50.06, and the thermal power generating unit does not allow the deterioration frequency;
when the load is stable:
and executing a load rate balancing strategy by the thermal power generating unit, namely adjusting the load rate in a fair load rate direction.
7. A multi-type energy integrated cooperative control device, characterized by comprising:
the first quantity to be adjusted determining module is configured to obtain a first quantity to be adjusted according to the whole network load increment of the power grid and the pre-filtered regional control deviation;
the second to-be-adjusted quantity determining module is configured to obtain a second to-be-adjusted quantity after the first to-be-adjusted quantity is subjected to frequency modulation by the hydroelectric generating set;
the third to-be-adjusted quantity determining module is used for obtaining a third to-be-adjusted quantity according to the second to-be-adjusted quantity, the wind power prediction increment, the photoelectric prediction increment and the interconnecting line prediction increment;
the strategy adjusting module is configured to judge the section type of the unit, and the unit under the section adjusts the third to-be-adjusted quantity according to a preset section strategy, a preset frequency protection strategy and a preset hydropower standby protection strategy to obtain the remaining to-be-adjusted quantity;
the section strategy is as follows: dividing a section into a normal area, a help area, an emergency area and an out-of-limit area according to the section load rate;
for a conventional energy section in a help area, the high-sensitivity unit under the section is upwards locked, and the power rising regulation is not participated;
for a conventional energy section in an emergency area, all units under the section are upwards locked, and the power rising regulation is not participated; the high-sensitivity unit is preferentially adjusted towards the direction of the recovery section;
for a conventional energy section in an out-of-limit area, lifting and locking all units below the section, and adjusting all units in the section recovery direction without participating in lifting power adjustment;
for the multi-energy mixed section in the normal area, the conventional unit is regulated normally, and the new energy unit is regulated according to peak regulation and section control instructions;
for the multi-energy mixed section in the help area, the conventional unit is adjusted towards the section recovery direction, and the adjustment of the new energy unit measures the minimum value of the current output, peak regulation and section control instructions;
for the multi-energy mixed section in the emergency area, the conventional unit is adjusted towards the section recovery direction, and if the conventional unit is fully reserved, the adjustment of the new energy unit measures the minimum value of the current output, peak regulation and section control instructions; otherwise, the new energy unit is regulated to the section recovery direction;
for the multi-energy mixed section in the out-of-limit area, all units are adjusted towards the section recovery direction;
the frequency protection strategy when the section is adjusted comprises the following steps:
(41) Under the condition of considering the hydropower standby protection strategy, the third quantity to be regulated is regulated through a hydropower unit, so as to obtain a fourth quantity to be regulated;
(42) The thermal power generating unit adjusts the fourth to-be-adjusted quantity according to the load trend in the spin-standby range of the thermal power generating unit to obtain a fifth to-be-adjusted quantity;
(43) If the section is a conventional energy section, the fifth to-be-adjusted quantity is the residual to-be-adjusted quantity;
if the section is a multi-energy mixed section, the new energy unit is enabled to adjust the fifth to-be-adjusted quantity within the adjustment quantity range of the new energy unit, and the remaining to-be-adjusted quantity is obtained;
the frequency protection strategy is: the thermal power generating unit is regulated according to the load trend, the sufficient reserve and the 70% reserve are ensured when climbing, the sufficient reserve and the 70% reserve are ensured when descending, and the 50% reserve are ensured when stabilizing; the remaining amount to be adjusted adjusting module is configured to complete adjustment of the remaining amount to be adjusted by the thermal power generating unit.
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