CN116316919A - Multistage coordination-based high-proportion new energy reactive voltage regulation control method - Google Patents
Multistage coordination-based high-proportion new energy reactive voltage regulation control method 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
- H02J3/50—Controlling the sharing of the out-of-phase component
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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
- H02J3/004—Generation forecast, e.g. methods or systems for forecasting future energy generation
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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
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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
- H02J3/381—Dispersed generators
-
- 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
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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
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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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
-
- 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
- H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses a high-proportion new energy reactive voltage regulation control method based on multistage coordination, which relates to the technical field of new energy power generation, and comprises the following steps: the reactive power data sample is obtained, the total power variation is predicted, the deviation between the variation is calculated, a reactive power control instruction is generated, the reactive power demand value of the new energy power station is calculated, the reactive power loss of the new energy power station is obtained through the reactive power data sample and the multi-element driving model, the reliability of the reactive power loss obtaining is improved, and the reactive power control instruction of the new energy power station is generated based on the total reactive power variation and the total active power variation rate; and performing reactive power control on the new energy station according to the reactive power control instruction of the new energy station, so that advanced control of reactive power is implemented based on the influence of load change on reactive voltage, the reactive power of the new energy unit is fully exerted, transient voltage support is actively performed, and the running stability of the power system is improved.
Description
Technical Field
The invention relates to the technical field of new energy power generation, in particular to a high-proportion new energy reactive voltage regulation control method based on multistage coordination.
Background
The development of new energy stations such as wind power and photovoltaic in new energy has the characteristics of large scale, centralized development mode and the like, but as the duty ratio of the new energy in a power grid system is continuously improved, the single-machine capacity is continuously increased, but as the new energy power generation has instability in the power grid system, large-scale new energy grid connection brings about larger load to the stability of the power grid operation, meanwhile, a new energy grid connection area often lacks local load and conventional power supply support, the new energy needs to be transported to a load center for a long distance in the grid connection process, the partial pressure effect exists in the power transmission line impedance of the output power of the new energy power generation to be tested, the grid connection point voltage of the new energy power generation unit is changed along with the change of the output power and the line equivalent impedance and the equivalent impedance of an access power grid, the reactive voltage regulating capacity of the new energy power generation unit cannot be accurately measured and evaluated, the current time section of the power grid system is brought forward, the conventional system control considers the current time section of the power system, the system is triggered to control logic when the load of the voltage value is too large, the system is easy to control, the system is easy to be controlled, the new energy is easy to be lost along with the fluctuation of the power grid, and the power grid is easy to be lost, the power grid is easy to be lost due to the fluctuation of the power fluctuation, and the power grid is easy to be received in the power fluctuation, and has the power fluctuation of the power grid has the power fluctuation, and the power source has the power fluctuation has and stable power source has and power stability.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a high-proportion new energy reactive voltage regulation control method based on multistage coordination, which solves the problems in the background art.
In order to achieve the above purpose, the invention is realized by the following technical scheme: a high-proportion new energy reactive voltage regulation control method based on multistage coordination comprises the following steps:
step one: acquiring a reactive data sample, controlling an AGC active power planning value based on the automatic power generation amount at the current moment of the new energy station received from an automatic power generation amount control AGC system, and calculating a total active power variation required by the new energy station by the automatic power generation amount control AGC system from a power prediction value of the new energy station received by the power prediction system; meanwhile, collecting voltage of a high-voltage side of a grid-connected point of the new energy station, reactive power value of the grid-connected point and system impedance, wherein the system impedance is impedance of a boost transformer and a circuit in the new energy station, and calculating a difference value between the voltage of the high-voltage side of the grid-connected point and a voltage reference value to obtain transient voltage deviation; the system comprises an acquisition unit, a reactive voltage regulation capacity detection system, a power consumption acquisition unit and a power consumption control unit, wherein the acquisition unit is used for acquiring a plurality of groups of reactive data samples, and detecting new energy reactive voltage regulation control of a new energy station through the reactive voltage regulation capacity detection system;
step two: predicting total power variation, and calculating the total active power variation of an electric field by counting the number of units of the new energy station, the number of units of the grid-connected unit and the active power variation of a single unit; the method comprises the steps of collecting active power values and reactive power values of all single units of a new energy station and total active power variable quantity required by the new energy station and AGC active power planned values at the current moment through a data collection system, so as to predict total reactive power variable quantity generated by the total active power variable quantity required by the new energy station and generate reactive control instructions of the new energy station based on the total reactive power variable quantity and the total active power variable rate;
step three: calculating the deviation between the variable amounts, and calculating the reactive power variable amount of each reactive power source in the response time and the deviation between the total reactive power variable amount of each reactive power source in the response time of the new energy station and the total reactive power variable amount of each reactive power source according to the total reactive power variable amount and the reactive power regulation rate of each reactive power source in the new energy station;
step four: generating a reactive power control instruction, and evenly distributing the deviation in the third step to each reactive power source in the new energy station to perform addition operation with reactive power variation amounts which can be responded by each reactive power source within the response time respectively, so as to obtain the reactive power variation amount of each reactive power source; generating reactive power control instructions of the new energy station aiming at each reactive power source according to the calculated reactive power variation of each reactive power source and the reactive power value of each reactive power source;
step five: calculating reactive power demand values of the new energy power station, and determining reactive power output reference values of specific units of the new energy power station according to the multiple groups of reactive data samples in the step one; the reactive data sample comprises total reactive power data of the power generation unit and reactive power data of grid-connected points, and calculates reactive power demand values of the new energy power station according to a dispatching instruction output by a power grid dispatching system; and adjusting the reactive power output value of each specific unit of the new energy power station to be the reactive power output reference value.
Preferably, the obtaining unit further includes a model unit, which is configured to input the reactive data sample and the grid-connected point target reactive power into a multi-element driving model, obtain a target total reactive power of the power generating unit output by the multi-element driving model, and the multi-element driving model is established based on a linear regression relationship between the total reactive power of the power generating unit and the grid-connected point reactive power.
Preferably, the reactive voltage regulation capability detection system calculates the total active power variation required by the new energy station based on the current time AGC active power planning value of the new energy station received from the AGC system when the new energy station operates in a power-limited mode; when the new energy station is operated with non-limited power, the total active power variation required by the new energy station is calculated based on a smaller value of the current time AGC active power planning value of the new energy station received from the AGC system and the power prediction value of the new energy station received from the power prediction system.
Preferably, the reactive data sample acquiring unit determines a reactive power adjustment amount of each power generating unit based on a target total reactive power of the power generating unit, a reactive rated capacity of each power generating unit and a reactive rated total capacity of the new energy station, and sends a reactive power adjustment instruction to each power generating unit based on the reactive power adjustment amount.
Preferably, in the sixth step, the voltage regulating controller further performs a difference calculation according to the voltage of the high-voltage side of the grid-connected point and the voltage reference value to obtain a transient voltage deviation, and when the transient voltage deviation exceeds the upper limit and the lower limit of the voltage dead zone range, calculates according to the voltage of the high-voltage side of the grid-connected point, the reactive value and the system impedance to obtain the reactive power target value required by the new energy station.
Preferably, the second step further includes performing reactive power control on the new energy station according to a reactive power control instruction of the new energy station, and dividing the total active power variation by the total active power variation rate to obtain a response time required for completing the total active power variation.
The invention provides a high-proportion new energy reactive voltage regulation control method based on multistage coordination. The beneficial effects are as follows:
the reactive power data sample and the multielement driving model are used for acquiring reactive power loss of the new energy station, the reliability of the reactive power loss acquisition is improved, and a reactive power control instruction of the new energy station is generated based on the total reactive power variation and the total active power variation rate; and performing reactive power control on the new energy station according to the reactive power control instruction of the new energy station, so that advanced control of reactive power is implemented based on the influence of load change on reactive voltage, the reactive power of the new energy unit is fully exerted, transient voltage support is actively performed, and the running stability of the power system is improved.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the embodiment of the invention provides a technical scheme: a high-proportion new energy reactive voltage regulation control method based on multistage coordination comprises the following steps:
step one: acquiring a reactive data sample, controlling an AGC active power planning value based on the automatic power generation amount at the current moment of the new energy station received from an automatic power generation amount control AGC system, and calculating a total active power variation required by the new energy station by the automatic power generation amount control AGC system from a power prediction value of the new energy station received by the power prediction system; meanwhile, collecting voltage of a high-voltage side of a grid-connected point of the new energy station, reactive power value of the grid-connected point and system impedance, wherein the system impedance is impedance of a boost transformer and a circuit in the new energy station, and calculating a difference value between the voltage of the high-voltage side of the grid-connected point and a voltage reference value to obtain transient voltage deviation; the system comprises an acquisition unit, a reactive voltage regulation capacity detection system, a power consumption acquisition unit and a power consumption control unit, wherein the acquisition unit is used for acquiring a plurality of groups of reactive data samples, and detecting new energy reactive voltage regulation control of a new energy station through the reactive voltage regulation capacity detection system;
step two: predicting total power variation, and calculating the total active power variation of an electric field by counting the number of units of the new energy station, the number of units of the grid-connected unit and the active power variation of a single unit; the method comprises the steps of collecting active power values and reactive power values of all single units of a new energy station and total active power variable quantity required by the new energy station and AGC active power planned values at the current moment through a data collection system, so as to predict total reactive power variable quantity generated by the total active power variable quantity required by the new energy station and generate reactive control instructions of the new energy station based on the total reactive power variable quantity and the total active power variable rate;
step three: calculating the deviation between the variable amounts, and calculating the reactive power variable amount of each reactive power source in the response time and the deviation between the total reactive power variable amount of each reactive power source in the response time of the new energy station and the total reactive power variable amount of each reactive power source according to the total reactive power variable amount and the reactive power regulation rate of each reactive power source in the new energy station;
step four: generating a reactive power control instruction, and evenly distributing the deviation in the third step to each reactive power source in the new energy station to perform addition operation with reactive power variation amounts which can be responded by each reactive power source within the response time respectively, so as to obtain the reactive power variation amount of each reactive power source; generating reactive power control instructions of the new energy station aiming at each reactive power source according to the calculated reactive power variation of each reactive power source and the reactive power value of each reactive power source;
step five: calculating reactive power demand values of the new energy power station, and determining reactive power output reference values of specific units of the new energy power station according to the multiple groups of reactive data samples in the step one; the reactive data sample comprises total reactive power data of the power generation unit and reactive power data of grid-connected points, and calculates reactive power demand values of the new energy power station according to a dispatching instruction output by a power grid dispatching system; and adjusting the reactive power output value of each specific unit of the new energy power station to be the reactive power output reference value.
The acquisition unit further comprises a model unit, wherein the model unit is used for inputting the reactive data sample and the grid-connected point target reactive power into a multi-element driving model to obtain the target total reactive power of the power generation unit output by the multi-element driving model, and the multi-element driving model is established based on a linear regression relation between the total reactive power of the power generation unit and the grid-connected point reactive power.
When the reactive voltage regulation capability detection system operates at the limit power of a new energy station, calculating the total active power variation required by the new energy station based on the current time AGC active power planned value of the new energy station received from the AGC system; when the new energy station is operated with non-limited power, the total active power variation required by the new energy station is calculated based on a smaller value of the current time AGC active power planning value of the new energy station received from the AGC system and the power prediction value of the new energy station received from the power prediction system.
The reactive power data sample acquisition unit determines reactive power adjustment quantity of each power generation unit based on the target total reactive power of the power generation units, the reactive rated capacity of each power generation unit and the reactive rated total capacity of the new energy station, and sends reactive power adjustment instructions to each power generation unit based on the reactive power adjustment quantity.
And step six, the voltage regulating controller calculates the difference value according to the voltage of the high-voltage side of the grid-connected point and the voltage reference value to obtain transient voltage deviation, and when the transient voltage deviation exceeds the upper limit and the lower limit of the voltage dead zone range, the voltage of the high-voltage side of the grid-connected point, the reactive value and the system impedance are calculated to obtain the reactive power target value required by the new energy station.
And step two, reactive power control is carried out on the new energy station according to a reactive power control instruction of the new energy station, and the total active power change quantity is divided by the total active power change rate, so that response time required for completing the total active power change quantity is obtained.
The reactive power data sample and the multielement driving model are used for acquiring reactive power loss of the new energy station, the reliability of the reactive power loss acquisition is improved, and a reactive power control instruction of the new energy station is generated based on the total reactive power variation and the total active power variation rate; and performing reactive power control on the new energy station according to the reactive power control instruction of the new energy station, so that advanced control of reactive power is implemented based on the influence of load change on reactive voltage, the reactive power of the new energy unit is fully exerted, transient voltage support is actively performed, and the running stability of the power system is improved.
Claims (6)
1. A high-proportion new energy reactive voltage regulation control method based on multistage coordination is characterized by comprising the following steps of: the steps include the following:
step one: acquiring a reactive data sample, controlling an AGC active power planning value based on the automatic power generation amount at the current moment of the new energy station received from an automatic power generation amount control AGC system, and calculating a total active power variation required by the new energy station by the automatic power generation amount control AGC system from a power prediction value of the new energy station received by the power prediction system; meanwhile, collecting voltage of a high-voltage side of a grid-connected point of the new energy station, reactive power value of the grid-connected point and system impedance, wherein the system impedance is impedance of a boost transformer and a circuit in the new energy station, and calculating a difference value between the voltage of the high-voltage side of the grid-connected point and a voltage reference value to obtain transient voltage deviation; the system comprises an acquisition unit, a reactive voltage regulation capacity detection system, a power consumption acquisition unit and a power consumption control unit, wherein the acquisition unit is used for acquiring a plurality of groups of reactive data samples, and detecting new energy reactive voltage regulation control of a new energy station through the reactive voltage regulation capacity detection system;
step two: predicting total power variation, and calculating the total active power variation of an electric field by counting the number of units of the new energy station, the number of units of the grid-connected unit and the active power variation of a single unit; the method comprises the steps of collecting active power values and reactive power values of all single units of a new energy station and total active power variable quantity required by the new energy station and AGC active power planned values at the current moment through a data collection system, so as to predict total reactive power variable quantity generated by the total active power variable quantity required by the new energy station and generate reactive control instructions of the new energy station based on the total reactive power variable quantity and the total active power variable rate;
step three: calculating the deviation between the variable amounts, and calculating the reactive power variable amount of each reactive power source in the response time and the deviation between the total reactive power variable amount of each reactive power source in the response time of the new energy station and the total reactive power variable amount of each reactive power source according to the total reactive power variable amount and the reactive power regulation rate of each reactive power source in the new energy station;
step four: generating a reactive power control instruction, and evenly distributing the deviation in the third step to each reactive power source in the new energy station to perform addition operation with reactive power variation amounts which can be responded by each reactive power source within the response time respectively, so as to obtain the reactive power variation amount of each reactive power source; generating reactive power control instructions of the new energy station aiming at each reactive power source according to the calculated reactive power variation of each reactive power source and the reactive power value of each reactive power source;
step five: calculating reactive power demand values of the new energy power station, and determining reactive power output reference values of specific units of the new energy power station according to the multiple groups of reactive data samples in the step one; the reactive data sample comprises total reactive power data of the power generation unit and reactive power data of grid-connected points, and calculates reactive power demand values of the new energy power station according to a dispatching instruction output by a power grid dispatching system; and adjusting the reactive power output value of each specific unit of the new energy power station to be the reactive power output reference value.
2. The high-proportion new energy reactive voltage regulation control method based on multistage coordination according to claim 1, which is characterized in that: the acquisition unit further comprises a model unit, wherein the model unit is used for inputting the reactive data sample and the grid-connected point target reactive power into a multi-element driving model to obtain the target total reactive power of the power generation unit output by the multi-element driving model, and the multi-element driving model is established based on a linear regression relation between the total reactive power of the power generation unit and the grid-connected point reactive power.
3. The high-proportion new energy reactive voltage regulation control method based on multistage coordination according to claim 1, which is characterized in that: when the reactive voltage regulation capability detection system operates at the limit power of a new energy station, calculating the total active power variation required by the new energy station based on the current time AGC active power planned value of the new energy station received from the AGC system; when the new energy station is operated with non-limited power, the total active power variation required by the new energy station is calculated based on a smaller value of the current time AGC active power planning value of the new energy station received from the AGC system and the power prediction value of the new energy station received from the power prediction system.
4. The high-proportion new energy reactive voltage regulation control method based on multistage coordination according to claim 3, wherein the method is characterized by comprising the following steps of: the reactive power data sample acquisition unit determines reactive power adjustment quantity of each power generation unit based on the target total reactive power of the power generation units, the reactive rated capacity of each power generation unit and the reactive rated total capacity of the new energy station, and sends reactive power adjustment instructions to each power generation unit based on the reactive power adjustment quantity.
5. The high-proportion new energy reactive voltage regulation control method based on multistage coordination according to claim 1, which is characterized in that: and step six, the voltage regulating controller calculates the difference value according to the voltage of the high-voltage side of the grid-connected point and the voltage reference value to obtain transient voltage deviation, and when the transient voltage deviation exceeds the upper limit and the lower limit of the voltage dead zone range, the voltage of the high-voltage side of the grid-connected point, the reactive value and the system impedance are calculated to obtain the reactive power target value required by the new energy station.
6. The high-proportion new energy reactive voltage regulation control method based on multistage coordination according to claim 1, which is characterized in that: and step two, reactive power control is carried out on the new energy station according to a reactive power control instruction of the new energy station, and the total active power change quantity is divided by the total active power change rate, so that response time required for completing the total active power change quantity is obtained.
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| CN116979390A (en) * | 2023-07-31 | 2023-10-31 | 南京中汇电气科技有限公司 | Automatic voltage reactive power control dual-regulation method for new energy station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116979390A (en) * | 2023-07-31 | 2023-10-31 | 南京中汇电气科技有限公司 | Automatic voltage reactive power control dual-regulation method for new energy station |
| CN116979390B (en) * | 2023-07-31 | 2024-02-13 | 南京中汇电气科技有限公司 | Automatic voltage reactive power control dual-regulation method for new energy station |
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