CN116961029A - AGC active steady-state control method, system, terminal and storage medium - Google Patents

AGC active steady-state control method, system, terminal and storage medium Download PDF

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Publication number
CN116961029A
CN116961029A CN202310929389.7A CN202310929389A CN116961029A CN 116961029 A CN116961029 A CN 116961029A CN 202310929389 A CN202310929389 A CN 202310929389A CN 116961029 A CN116961029 A CN 116961029A
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frequency deviation
frequency
coefficient
power grid
disturbance
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陈勇
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Cgn Beijing New Energy Technology Co ltd
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Cgn Beijing New Energy Technology Co ltd
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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
    • 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
    • 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
    • H02J3/48—Controlling the sharing of the in-phase component
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The application relates to an AGC active steady-state control method, a system, a terminal and a storage medium, which belong to the technical field of power grids, and comprise the steps of establishing a regional power grid overall process simulation model; acquiring a natural frequency characteristic coefficient of the regional power grid by using a simulation means; establishing a common disturbance set of the power grid according to the magnitude of the disturbance quantity; setting a configuration scheme applicability evaluation index; forming a group of frequency deviation coefficients according to the natural frequency characteristic coefficient and the dynamic characteristic of the power grid frequency-related element; setting the proportional gain of different control areas according to the frequency deviation coefficient; setting a normal zone threshold, a secondary emergency zone threshold and an emergency zone threshold of the system according to the frequency deviation coefficient and the proportional gain; and carrying out rationality evaluation on the frequency deviation coefficient and the proportional gain, if the frequency deviation coefficient is not in accordance with the requirement, re-forming the frequency deviation coefficient, and if the frequency deviation coefficient is in accordance with the requirement, taking the frequency deviation coefficient as a final configuration scheme. The application has the effects of improving the frequency quality of the power grid and ensuring the safe and economic operation of the power grid.

Description

AGC active steady-state control method, system, terminal and storage medium
Technical Field
The application relates to the technical field of power grids, in particular to an AGC active steady-state control method, an AGC active steady-state control system, a AGC active steady-state control terminal and a AGC active steady-state control storage medium.
Background
In recent years, with the sequential production of extra-high voltage direct current system engineering, the power grid scale is continuously enlarged, and the power grid operation difficulty is increasingly improved. In order to ensure the safety of the power grid and improve the operation reliability, an alternating current connecting line is canceled between the transmitting end system and the main network, and the alternating current decoupling is realized only by direct current, so that the transmitting end power grid and the main network are asynchronously interconnected. The power grid scale is greatly reduced after asynchronous interconnection, the load level is sharply reduced, the power grid operation difficulty is greatly improved, and the frequency stability becomes a key factor affecting the safe and stable operation of the system.
AGC is used as an important means for active power control of a modern power grid, and plays a key role in improving the frequency quality of the power grid and ensuring the safe and economic operation of the power grid. The high water-electricity duty ratio asynchronous operation transmitting end power grid has higher requirements on the operation of AGC. And the primary station parameters play a critical role in secondary frequency modulation effect.
At present, the setting of the parameters of the main stations at home and abroad mostly depends on the operation experience of a dispatcher, the frequency deviation coefficient, the proportional gains of different control areas and the threshold division of the control areas are manually adjusted mainly by the feedback of the actual power grid operation effect, and the trial-and-error cost is high. In the control setting of the main station, the domestic part of high-proportion hydroelectric power grid tries to adopt a segmented frequency deviation coefficient or set a proportion gain for a control area to improve the regulation level of the system. The use of too many frequency deviation coefficients may cause the regional power deviation to oscillate in frequent frequency deviation coefficient switching. And the adoption of a single larger frequency deviation coefficient to match with multiple groups of proportional gains can lead to failure of a connecting line component in the regional control deviation under small frequency deviation.
Disclosure of Invention
The application provides an AGC active steady-state control method, an AGC active steady-state control system, a AGC active steady-state control terminal and a AGC storage medium.
The application aims to provide an AGC active steady-state control method.
The first object of the present application is achieved by the following technical solutions:
an AGC active steady state control method comprising:
establishing a regional power grid whole process simulation model;
acquiring a natural frequency characteristic coefficient of the regional power grid by using a simulation means;
establishing a common disturbance set of the power grid according to the magnitude of the disturbance quantity;
setting a configuration scheme applicability evaluation index;
forming a group of frequency deviation coefficients according to the natural frequency characteristic coefficient and the dynamic characteristic of the power grid frequency-related element;
setting the proportional gain of different control areas according to the frequency deviation coefficient;
setting a normal zone threshold, a secondary emergency zone threshold and an emergency zone threshold of the system according to the frequency deviation coefficient and the proportional gain;
and carrying out rationality evaluation on the frequency deviation coefficient and the proportional gain, if the frequency deviation coefficient is not in accordance with the requirement, re-forming the frequency deviation coefficient, and if the frequency deviation coefficient is in accordance with the requirement, taking the frequency deviation coefficient as a final configuration scheme.
By adopting the technical scheme, on the basis of establishing the whole-process simulation model of the regional power grid, the configuration of key parameters of the AGC main station of the high-proportion hydropower region is realized by means of simulation, the division threshold of the control region and the proportional gains of different control regions can be accurately set, the actual power grid trial and error is not needed, a high-adaptability parameter configuration scheme can be formed, various operation conditions possibly occurring in the power grid can be met with high quality, and the stability and economy of the power grid operation are improved; therefore, the frequency quality of the power grid is effectively improved, and the safe and economic operation of the power grid is ensured.
The present application may be further configured in a preferred example to: the regional power grid whole process simulation model comprises a secondary frequency modulation whole frequency-involved element, and the coincidence regulation effect is considered.
The present application may be further configured in a preferred example to: the method for obtaining the natural frequency characteristic coefficient of the regional power grid by using the simulation means comprises the following steps:
modifying the whole process simulation model of the regional power grid, and keeping the adjustment effect, the primary frequency modulation of the generating set and the frequency modulation capacity of the DC frequency modulation limiter; the whole-network secondary frequency modulation is stopped, and the generator set with the capacity lower than the designated capacity of the whole network is stopped at the primary frequency modulation;
and setting the whole network to meet unidirectional fluctuation in the same proportion, and ensuring that the power grid is in a quasi-steady state at all times, wherein the load variation and the system frequency deviation are the natural frequency characteristic coefficients of the system.
The present application may be further configured in a preferred example to: the common disturbance set of the power grid comprises: steady-state random fluctuation, main power unit disturbance and direct current disturbance;
the steady random fluctuation is the sum of fluctuation around a base point and consistency fluctuation in a certain time period; the consistency fluctuation comprises five types of splicing of power gradual rise, power rapid fall, power maintenance and power gradual fall;
the main power unit disturbance comprises tripping of the main power unit in the area and tripping of the main power unit outside the area;
the DC disturbances include a DC power ramp down and a DC lock-up.
The present application may be further configured in a preferred example to: the setting of the configuration scheme applicability evaluation index includes: setting steady-state operation frequency deviation, frequency recovery speed after fault disturbance and out-of-zone disturbance anti-tuning condition;
the steady-state operation frequency deviation index comprises frequency exceeding limit times, maximum frequency deviation and frequency deviation mean square error in a designated time;
the frequency recovery speed index after fault disturbance counts the time required for the first recovery from the lowest frequency point after disturbance to the system frequency deviation to be within the dead zone of the generator set regulation;
the out-of-zone disturbance anti-modulation index comprises the maximum anti-modulation amount and the anti-modulation duration in the disturbance process.
The present application may be further configured in a preferred example to: the frequency deviation coefficient is set according to the natural frequency characteristic coefficient of the dead zone frequency deviation of the generator set and the natural frequency characteristic coefficient of the dead zone frequency deviation of the direct current frequency limiter.
The present application may be further configured in a preferred example to: the proportional gain is set for the magnitude of the reference frequency deviation coefficients of different control areas, and the proportional coefficients of the normal area, the secondary emergency area and the emergency area are sequentially increased.
The application aims at providing an AGC active steady-state control system.
The second object of the present application is achieved by the following technical solutions:
an AGC active steady state control system comprising:
the modeling module is used for establishing a regional power grid overall process simulation model;
the acquisition module is used for acquiring the natural frequency characteristic coefficient of the regional power grid by a simulation means and establishing a common disturbance set of the power grid according to the magnitude of the disturbance quantity;
the setting module is used for setting an applicability evaluation index of the configuration scheme and forming a group of frequency deviation coefficients according to the natural frequency characteristic coefficient and the dynamic characteristic of the power grid frequency-related element;
the control module is used for setting the proportional gain of different control areas according to the frequency deviation coefficient; setting a normal zone threshold, a secondary emergency zone threshold and an emergency zone threshold of the system according to the frequency deviation coefficient and the proportional gain;
and the evaluation module is used for carrying out rationality evaluation on the frequency deviation coefficient and the proportional gain, if the frequency deviation coefficient does not meet the requirement, the frequency deviation coefficient is formed again, and if the frequency deviation coefficient meets the requirement, the frequency deviation coefficient is used as a final configuration scheme.
The application aims at providing a terminal.
The third object of the present application is achieved by the following technical solutions:
a terminal comprising a memory and a processor, the memory having stored thereon computer program instructions of the above AGC active steady state control method that can be loaded and executed by the processor.
A fourth object of the present application is to provide a computer medium capable of storing a corresponding program.
The fourth object of the present application is achieved by the following technical solutions:
a computer readable storage medium storing a computer program capable of being loaded by a processor and executing any one of the AGC active steady state control methods described above.
In summary, the present application includes at least one of the following beneficial technical effects:
1. on the basis of establishing a regional power grid whole process simulation model, the configuration of key parameters of the AGC main station of the high-proportion hydropower region is realized by means of simulation means, the division threshold of a control region and the proportional gains of different control regions can be accurately set, an actual power grid trial and error is not needed, a high-adaptability parameter configuration scheme can be formed, various operation conditions possibly occurring in a power grid can be met with high quality, and the stability and the economy of power grid operation are improved. Compared with the traditional method, the method can effectively improve the frequency quality of the power grid and ensure the safe and economic operation of the power grid.
Drawings
Fig. 1 is a flow chart of an AGC active steady state control method in an embodiment of the present application.
Fig. 2 is a schematic structural diagram of an AGC active steady state control system according to an embodiment of the present application.
Reference numerals illustrate: 1. a modeling module; 2. an acquisition module; 3. setting a module; 4. a control module; 5. and an evaluation module.
Detailed Description
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required, are within the scope of the claims of the present application as far as they are protected by patent law.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Embodiments of the application are described in further detail below with reference to the drawings.
The application provides an AGC active steady-state control method, and the main flow of the method is described as follows.
As shown in fig. 1:
step S101: and establishing a regional power grid whole-process simulation model.
In the embodiment of the application, firstly, an area power grid whole process simulation model is established, wherein the area power grid whole process simulation model comprises a secondary frequency modulation whole frequency-involved element, such as a speed regulator, a steam turbine, a water turbine, an AGC system, a power plant monitoring system, a direct current frequency limiter (FC or FLC) and the like, and the load regulation effect is considered
Step S102: and acquiring the natural frequency characteristic coefficient of the regional power grid by using a simulation means.
In the embodiment of the application, after the whole process simulation model of the regional power grid is established, the natural frequency characteristic coefficient of the regional power grid is obtained through a simulation means, and the method is specifically as follows: firstly, modifying a whole process simulation model of a regional power grid, and keeping the frequency modulation capability of a primary frequency modulation limiter and a direct current frequency modulation limiter which accord with the regulation effect; the whole-network secondary frequency modulation is stopped, and the generator set with the capacity lower than the designated capacity of the whole network is stopped at the primary frequency modulation; and setting the whole network to meet unidirectional fluctuation in the same proportion, and ensuring that the power grid is in a quasi-steady state at all times, wherein the load variation and the system frequency deviation are the natural frequency characteristic coefficients of the system.
Step S103: and establishing a common disturbance set of the power grid according to the magnitude of the disturbance quantity.
In the embodiment of the application, the disturbance set at least comprises three types of steady random fluctuation, main power unit disturbance and direct current disturbance; the steady random fluctuation is the sum of fluctuation around a base point and fluctuation of consistency within a certain period of time, and the fluctuation of consistency comprises five types of splicing of power gradual rise, power rapid fall, power maintenance and power gradual fall; the main power unit disturbance comprises tripping of the main power unit in the area and tripping of the main power unit outside the area; the dc perturbation includes a dc power ramp down and a dc lock-up.
Step S104: setting a configuration scheme applicability evaluation index.
In the embodiment of the application, the scheme applicability evaluation index comprises three indexes of steady-state operation frequency deviation, frequency recovery speed after fault disturbance and out-of-zone disturbance anti-tuning condition; wherein, the steady-state operation frequency deviation index comprises frequency exceeding limit times, maximum frequency deviation and frequency deviation mean square error in the appointed time; the fault disturbance frequency recovery speed index counts the time required for the first recovery from the lowest frequency point after the disturbance to the system frequency deviation to be within the dead zone of the generator set regulation; the out-of-zone disturbance anti-tuning index at least comprises the maximum anti-tuning amount and the anti-tuning existence duration in the disturbance process.
The steps are as follows: s105: and forming a group of frequency deviation coefficients according to the natural frequency characteristic coefficient and the dynamic characteristic of the power grid frequency-related element.
In the embodiment of the application, the frequency deviation coefficient determining method comprises the following steps: the natural frequency characteristic coefficient of the system presents strong nonlinearity, and the phase difference between the small frequency offset and the large frequency offset is extremely large. Setting a single frequency deviation coefficient is difficult to meet different frequency deviation requirements; setting too many frequency deviation coefficients may cause local power deviation oscillation. According to the frequency deviation coefficient set according to the type of the frequency modulation element in the power grid, considering that the typical high-proportion hydroelectric area is mostly an asynchronous operation power grid with direct current interconnection, the load level is small, and any disturbance can lead to the frequency exceeding the dead zone of the yielding power. Therefore, the frequency deviation coefficient is not independently set for the frequency deviation corresponding to the thermal power dead zone, but the frequency deviation coefficient under the condition that thermal power participates in frequency modulation is considered, namely, a coefficient is set by referring to the natural frequency characteristic coefficient under the frequency deviation of the thermal power dead zone. The hydropower primary frequency modulation capability of the high-proportion hydropower region is strong, meanwhile, the frequency deviation coefficient of the threshold system of the direct current frequency limiter is considered to be changed severely, and a coefficient can be set by referring to the dead zone frequency deviation natural frequency characteristic coefficient of the direct current frequency limiter. The master station is usually converted into FFC operation under the extra-large disturbance, the reverse adjustment of a non-fault area is not needed to be considered, and the frequency deviation coefficient is not independently set. If necessary, a frequency deviation coefficient may be additionally set with reference to the FFC frequency.
Step S106: and setting the proportional gain of different control areas according to the frequency deviation coefficient.
In the embodiment of the application, the magnitude of the frequency deviation coefficient is referenced, and different proportional gains are set for different control areas; specifically, the frequency deviation coefficient of the normal region is larger, and a smaller scale coefficient (such as 0.4) is set to prevent overshoot; the secondary emergency area and the emergency area gradually amplify the proportional gain, so that the control efficiency under the conditions of load climbing and faults is improved.
Step S107: setting a normal zone threshold, a secondary emergency zone threshold and an emergency zone threshold of the system according to the frequency deviation coefficient and the proportional gain.
In the embodiment of the present application, the control area sets the threshold as follows: a smaller normal zone threshold is set to reduce the delay effect of PI regulation. The value should not be too small to ensure that the frequency deviation coefficient set in step S105 and the proportional gain set in step S106 do not oscillate under the threshold value. The large secondary emergency area threshold is set, so that the system ACE generally does not enter the secondary emergency area under the steady-state load fluctuation working condition, and the system ACE enters the secondary emergency area from the normal area only under the severe working conditions such as rapid climbing of the system load and the like. The value cannot be excessively large, and the ACE of a general unit trip disturbance system can enter a secondary emergency area to accelerate the recovery of the system frequency. When the emergency area threshold is reasonably set and the system is in large disturbance, the system ACE can enter the emergency area and has a certain difference with the secondary emergency area threshold.
Step S108: and carrying out rationality evaluation on the frequency deviation coefficient and the proportional gain, if the frequency deviation coefficient is not in accordance with the requirement, re-forming the frequency deviation coefficient, and if the frequency deviation coefficient is in accordance with the requirement, taking the frequency deviation coefficient as a final configuration scheme.
Firstly, using whole process simulation software to simulate each working condition according to the disturbance set provided in the step S104, and evaluating the simulation result according to the evaluation index provided in the step S105. And after the evaluation is passed, carrying the actual power grid system. Meanwhile, the proportional gain of the normal area of ACE is reduced, so that the overshoot effect of the normal area is reduced.
The application also provides an AGC active steady-state control system, as shown in figure 2, which comprises: the modeling module 1 is used for establishing a regional power grid overall process simulation model; the acquisition module 2 is used for acquiring a natural frequency characteristic coefficient of the regional power grid by a simulation means and establishing a common disturbance set of the power grid according to the magnitude of the disturbance quantity; the setting module 3 is used for setting an applicability evaluation index of the configuration scheme and forming a group of frequency deviation coefficients according to the natural frequency characteristic coefficient and the dynamic characteristic of the power grid frequency-related element; the control module 4 is used for setting the proportional gain of different control areas according to the frequency deviation coefficient; setting a normal zone threshold, a secondary emergency zone threshold and an emergency zone threshold of the system according to the frequency deviation coefficient and the proportional gain; and the evaluation module 5 is used for carrying out rationality evaluation on the frequency deviation coefficient and the proportional gain, if the frequency deviation coefficient does not meet the requirement, the frequency deviation coefficient is reformed, and if the frequency deviation coefficient meets the requirement, the frequency deviation coefficient is used as a final configuration scheme.
In order to better execute the program of the method, the application also provides a terminal, which comprises a memory and a processor.
Wherein the memory may be used to store instructions, programs, code, sets of codes, or sets of instructions. The memory may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function, instructions for implementing the AGC active steady state control method described above, and the like; the memory data area may store data and the like involved in the AGC active steady state control method described above.
The processor may include one or more processing cores. The processor performs the various functions of the application and processes the data by executing or executing instructions, programs, code sets, or instruction sets stored in memory, calling data stored in memory. The processor may be at least one of an application specific integrated circuit, a digital signal processor, a digital signal processing device, a programmable logic device, a field programmable gate array, a central processing unit, a controller, a microcontroller, and a microprocessor. It will be appreciated that the electronics for implementing the above-described processor functions may be other for different devices, and embodiments of the present application are not particularly limited.
The present application also provides a computer-readable storage medium, for example, comprising: a U-disk, a removable hard disk, a Read Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes. The computer readable storage medium stores a computer program that can be loaded by a processor and that performs the AGC active steady state control method described above.
The above description is only illustrative of the preferred embodiments of the present application and the principles of the technology being employed. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in the present application is not limited to the specific combinations of technical features described above, but also covers other technical features which may be formed by any combination of the technical features described above or their equivalents without departing from the spirit of the disclosure. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims (10)

1. An AGC active steady state control method, comprising:
establishing a regional power grid whole process simulation model;
acquiring a natural frequency characteristic coefficient of the regional power grid by using a simulation means;
establishing a common disturbance set of the power grid according to the magnitude of the disturbance quantity;
setting a configuration scheme applicability evaluation index;
forming a group of frequency deviation coefficients according to the natural frequency characteristic coefficient and the dynamic characteristic of the power grid frequency-related element;
setting the proportional gain of different control areas according to the frequency deviation coefficient;
setting a normal zone threshold, a secondary emergency zone threshold and an emergency zone threshold of the system according to the frequency deviation coefficient and the proportional gain;
and carrying out rationality evaluation on the frequency deviation coefficient and the proportional gain, if the frequency deviation coefficient is not in accordance with the requirement, re-forming the frequency deviation coefficient, and if the frequency deviation coefficient is in accordance with the requirement, taking the frequency deviation coefficient as a final configuration scheme.
2. The AGC active steady state control method of claim 1 wherein the regional power grid overall process simulation model includes a secondary frequency modulation overall frequency-involved element and accounts for compliance with regulation effects.
3. The AGC active steady-state control method of claim 1, wherein the obtaining the natural frequency characteristic coefficient of the regional power grid by the simulation means comprises:
modifying the whole process simulation model of the regional power grid, and keeping the adjustment effect, the primary frequency modulation of the generating set and the frequency modulation capacity of the DC frequency modulation limiter; the whole-network secondary frequency modulation is stopped, and the generator set with the capacity lower than the designated capacity of the whole network is stopped at the primary frequency modulation;
and setting the whole network to meet unidirectional fluctuation in the same proportion, and ensuring that the power grid is in a quasi-steady state at all times, wherein the load variation and the system frequency deviation are the natural frequency characteristic coefficients of the system.
4. The AGC active steady state control method of claim 3 wherein the grid common disturbance set comprises: steady-state random fluctuation, main power unit disturbance and direct current disturbance;
the steady random fluctuation is the sum of fluctuation around a base point and consistency fluctuation in a certain time period; the consistency fluctuation comprises five types of splicing of power gradual rise, power rapid fall, power maintenance and power gradual fall;
the main power unit disturbance comprises tripping of the main power unit in the area and tripping of the main power unit outside the area;
the DC disturbances include a DC power ramp down and a DC lock-up.
5. The AGC active steady-state control method of claim 1, wherein the setting a configuration scheme applicability evaluation index comprises: setting steady-state operation frequency deviation, frequency recovery speed after fault disturbance and out-of-zone disturbance anti-tuning condition;
the steady-state operation frequency deviation index comprises frequency exceeding limit times, maximum frequency deviation and frequency deviation mean square error in a designated time;
the frequency recovery speed index after fault disturbance counts the time required for the first recovery from the lowest frequency point after disturbance to the system frequency deviation to be within the dead zone of the generator set regulation;
the out-of-zone disturbance anti-modulation index comprises the maximum anti-modulation amount and the anti-modulation duration in the disturbance process.
6. The AGC active steady state control method of claim 1, wherein the frequency deviation coefficient is set according to a natural frequency characteristic coefficient of a dead zone frequency deviation of a generator set and a natural frequency characteristic coefficient of a dead zone frequency deviation of a direct current frequency limiter.
7. The AGC active steady-state control method of claim 1 wherein the proportional gain is set for different control region reference frequency deviation coefficients, increasing in sequence according to the scaling coefficients of the normal region, the secondary emergency region and the emergency region.
8. An AGC active steady state control system comprising:
the modeling module (1) is used for building a regional power grid whole-process simulation model;
the acquisition module (2) is used for acquiring the natural frequency characteristic coefficient of the regional power grid by a simulation means and establishing a common disturbance set of the power grid according to the magnitude of the disturbance quantity;
the setting module (3) is used for setting an applicability evaluation index of the configuration scheme and forming a group of frequency deviation coefficients according to the natural frequency characteristic coefficient and the dynamic characteristic of the power grid frequency-related element;
the control module (4) is used for setting the proportional gain of different control areas according to the frequency deviation coefficient; setting a normal zone threshold, a secondary emergency zone threshold and an emergency zone threshold of the system according to the frequency deviation coefficient and the proportional gain;
and the evaluation module (5) is used for carrying out rationality evaluation on the frequency deviation coefficient and the proportional gain, if the frequency deviation coefficient is not in accordance with the requirement, the frequency deviation coefficient is reformed, and if the frequency deviation coefficient is in accordance with the requirement, the frequency deviation coefficient is used as a final configuration scheme.
9. A terminal comprising a memory and a processor, the memory having stored thereon computer program instructions capable of being loaded by the processor and performing the method according to any of claims 1-7.
10. A computer readable storage medium, characterized in that a computer program is stored which can be loaded by a processor and which performs the method according to any of claims 1-7.
CN202310929389.7A 2023-07-26 2023-07-26 AGC active steady-state control method, system, terminal and storage medium Pending CN116961029A (en)

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Application Number Priority Date Filing Date Title
CN202310929389.7A CN116961029A (en) 2023-07-26 2023-07-26 AGC active steady-state control method, system, terminal and storage medium

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