CN111835022A - Industrial isolated network frequency adjusting method, device and system - Google Patents
Industrial isolated network frequency adjusting method, device and system Download PDFInfo
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- CN111835022A CN111835022A CN202010673631.5A CN202010673631A CN111835022A CN 111835022 A CN111835022 A CN 111835022A CN 202010673631 A CN202010673631 A CN 202010673631A CN 111835022 A CN111835022 A CN 111835022A
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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
- 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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Abstract
The invention discloses a method, a device and a system for adjusting industrial isolated network frequency, wherein the method comprises the following steps: calculating unit adjusting power of the isolated network system; acquiring real-time power grid frequency of the isolated grid system; when the real-time frequency change rate of the isolated network system is smaller than a set threshold value and the real-time power grid frequency of the isolated network system is within a preset adjusting interval, calculating the power unbalance amount of the isolated network system based on unit adjusting power and the real-time power grid frequency; and comparing the power unbalance amount of the isolated network system with the primary frequency modulation capacity of the generator set, and sending regulation control information to each type of power supply and adjustable load in the isolated network system based on the comparison result to complete frequency regulation of the isolated network system. The invention fully transfers the adjustable load and the multi-type power supply to participate in the system frequency adjustment, and adjusts the load and the unit side output according to the calculated control quantity when the system frequency falls or rises to a preset interval aiming at the non-monitoring fault, thereby accelerating the system frequency recovery.
Description
Technical Field
The invention belongs to the technical field of frequency adjustment, and particularly relates to an industrial isolated network frequency adjusting method, device and system.
Background
Due to various factors such as economy, history and the like, a plurality of weak industrial enterprise power grids in China are only weakly connected with one or two communication channels or independently operated with a main grid. When the Chinese enterprises invest in the third world, the constructed industrial enterprise power grid has to operate independently due to weak local basic equipment. The power grid of the industrial enterprise has weaker power grid disturbance bearing capacity, but most of the produced industrial loads belong to primary and secondary loads which cause larger economic loss and even personal casualties, the loads account for weight and have complex characteristics, and the safety and stability control method and experience of the large power grid are not suitable for the power grid.
For the safety and stability problems of the power grid of such an industrial enterprise, the conventional technology is generally solved by measures such as a power system emergency control method (fault triggering based generator tripping, load shedding measures, namely a second defense line of the power system) and low-frequency low-voltage load shedding, high-frequency generator tripping and the like (frequency and voltage response based local devices, namely a third defense line of the power system).
The industrial isolated network rack is complex, an emergency control system cannot monitor all stations due to cost consideration, and when some non-monitoring faults (such as faults of auxiliary machines of a machine set or low-voltage level load loss faults) occur, the emergency control device cannot monitor the faults and cannot take control measures in time, and the frequency of the isolated network system obviously fluctuates and even triggers low-frequency load shedding or high-frequency generator tripping action. However, the power grid of the industrial enterprise generally has small system inertia, large granularity of low-frequency load shedding and high-frequency generator tripping actions, high possibility of low-frequency load shedding and overtaking loads → frequency rising to high-frequency protection actions → unit tripping, and high vicious circle of system low-frequency → low-frequency continuous overtaking loads, which not only easily leads to further expansion of accidents, but also is more likely to lead to power loss and network collapse of an isolated network system and brings huge economic loss.
Disclosure of Invention
Aiming at the problems, the invention provides an industrial isolated network frequency adjusting method, device and system, which can fully adjust an adjustable load and a multi-type power supply to participate in system frequency adjustment, adjust the load and the unit side output according to the calculated control quantity when the system frequency falls to a preset interval aiming at non-monitoring faults, accelerate the system frequency recovery and improve the safety stability margin of the system.
In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:
in a first aspect, the invention provides an industrial isolated network frequency adjusting method, which comprises the following steps:
calculating unit adjusting power of the isolated network system;
acquiring real-time power grid frequency of the isolated grid system;
when the change rate of the real-time power grid frequency of the isolated network system is smaller than a set threshold value and the real-time power grid frequency of the isolated network system is within a preset adjusting interval, calculating the power unbalance amount of the isolated network system based on the unit adjusting power and the real-time power grid frequency;
and comparing the power unbalance amount of the isolated network system with the primary frequency modulation capacity of the generator set, and sending regulation control information to each type of power supply and adjustable load in the isolated network system based on the comparison result to complete the frequency regulation of the industrial isolated network.
Optionally, the calculation formula of the power unbalance amount is as follows:
ΔP＝k×KS×Δf
wherein, the delta P is the power unbalance amount, K is the proportionality coefficient, and K isSΔ f is the difference between the real-time frequency and the standard frequency (50Hz) in units of regulated power.
Optionally, the comparing the power unbalance amount of the isolated network system with the primary frequency modulation capability of the generator set, and sending the adjustment control information to each type of power supply and adjustable load in the isolated network system based on the comparison result, includes the following steps:
and when the power unbalance amount of the isolated network system exceeds the primary frequency modulation capacity of the generator set in the isolated network and is less than 0, sending adjustment information for increasing the power output and reducing the load to each type of power supply and adjustable load in the isolated network system according to the power unbalance amount.
Optionally, the comparing the power unbalance amount of the isolated network system with the primary frequency modulation capability of the generator set, and sending the adjustment control information to each type of power supply and adjustable load in the isolated network system based on the comparison result, further includes the following steps:
and when the power unbalance amount of the isolated network system exceeds the primary frequency modulation capacity of the generator set in the isolated network and is more than 0, sending regulation information for reducing the power output and increasing the load to each type of power supply and adjustable load in the isolated network system according to the power unbalance amount.
Optionally, the calculation formula of the primary frequency modulation capability of the generator set is as follows:
wherein, PfNFor the primary frequency modulation capability of the generator set, k1 and k2 are proportionality coefficients, PnRated power, P, of thermal power generating unitsmThe number of the thermal power generating units with primary frequency modulation capability in the network is N, the number of the thermal power generating units with primary frequency modulation capability in the network is M, the number of the thermal power generating units with primary frequency modulation capability in the network is N, and the number of the thermal power generating units with primary frequency modulation capability in the network is M.
In a second aspect, the present invention provides an industrial isolated network frequency adjusting apparatus, including:
the first calculation unit is used for calculating the unit regulation power of the isolated network system;
the acquisition unit is used for acquiring the real-time power grid frequency of the isolated network system;
the second calculation unit is used for calculating the power unbalance amount of the isolated network system based on the unit regulation power and the real-time power grid frequency when the real-time power grid frequency change rate of the isolated network system is smaller than a set threshold value and the real-time power grid frequency of the isolated network system is within a preset regulation interval;
and the adjusting control unit is used for comparing the power unbalance amount of the isolated network system with the primary frequency modulation capacity of the generator set, and sending adjusting control information to each type of power supply and adjustable load in the isolated network system based on the comparison result to complete the frequency adjustment of the industrial isolated network.
Optionally, the calculation formula of the power unbalance amount is as follows:
ΔP＝k×KS×Δf
wherein, the delta P is the power unbalance amount, K is the proportionality coefficient, and K isSΔ f is the difference between the real-time frequency and the standard frequency (50Hz) in units of regulated power.
Optionally, the adjustment control unit includes a first sub-adjustment control unit, and is configured to send adjustment information for increasing power output and reducing load to each type of power supply and adjustable load in the isolated network system according to the power unbalance amount when the power unbalance amount of the isolated network system exceeds a primary frequency modulation capability of the generator set in the isolated network and is less than 0.
Optionally, the adjustment control unit includes a second sub-adjustment control unit, and is configured to send adjustment information for reducing power output and increasing load to each type of power supply and adjustable load in the isolated network system according to the power unbalance amount when the power unbalance amount of the isolated network system exceeds a primary frequency modulation capability of the generator set in the isolated network and is greater than 0.
Optionally, the calculation formula of the primary frequency modulation capability of the generator set is as follows:
wherein, PfNFor the primary frequency modulation capability of the generator set, k1 and k2 are proportionality coefficients, PnRated power, P, of thermal power generating unitsmThe number of the thermal power generating units with primary frequency modulation capability in the network is N, the number of the thermal power generating units with primary frequency modulation capability in the network is M, the number of the thermal power generating units with primary frequency modulation capability in the network is N, and the number of the thermal power generating units with primary frequency modulation capability in the network is M.
In a third aspect, the invention provides an industrial isolated network frequency adjustment system, which comprises a storage medium and a processor;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any one of the first aspects.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an industrial isolated network frequency adjusting method, device and system, which can fully adjust an adjustable load and a multi-type power supply to participate in system frequency adjustment, adjust the load and the unit side output through calculated control quantity when the system frequency falls or rises to a preset interval aiming at non-monitoring faults, accelerate the system frequency recovery and improve the safety stability margin of the system.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic flow chart of an industrial isolated network frequency adjustment method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
Example 1
Compared with a large power grid, the industrial enterprise power grid has the advantages of small power grid scale, weaker grid frame, small system inertia and obvious frequency fluctuation. In the event of some fault not recognized by the emergency control device, the system frequency may drop or rise to a third line of defense. And because the unit and load dispersion of the industrial enterprise power grid is high, the vicious cycle of third line of defense, over-cutting load → over-cutting unit → over-cutting load is easy to occur, so that the system vibrates repeatedly at low frequency and high frequency until the grid is unstable. Aiming at the fault which cannot be identified by the emergency control device, when the system frequency exceeds the normal operation range but does not fall to the low-frequency deloading action or rise to the high-frequency tripping machine action, the invention adjusts the output of the load side and the power supply side in real time, accelerates the system frequency to recover to the normal range, avoids the system frequency from further rising or falling to the third line of defense action, and improves the safety and stability margin of the system.
Specifically, as shown in fig. 1, an industrial isolated network frequency adjustment method in an embodiment of the present invention includes the following steps:
calculating unit adjusting power of the isolated network system;
acquiring real-time power grid frequency of the isolated grid system;
when the change rate of the real-time power grid frequency of the isolated network system is smaller than a set threshold value and the real-time power grid frequency of the isolated network system is within a preset adjusting interval, calculating the power unbalance amount of the isolated network system based on the unit adjusting power and the real-time power grid frequency;
and comparing the power unbalance amount of the isolated network system with the primary frequency modulation capacity of the generator set, and sending regulation control information to each type of power supply and adjustable load in the isolated network system based on the comparison result to complete the frequency regulation of the industrial isolated network.
In a specific implementation manner of the embodiment of the present invention, the preset adjustment interval refers to a frequency adjustment interval determined according to an actual power grid scale and an operation condition, and the frequency adjustment interval exceeds a frequency normal operation range but does not exceed a third defensive line action value.
The adjustment control information in the present invention can be calculated based on the prior art, and therefore, the present invention is not described in detail.
In a specific implementation manner of the embodiment of the present invention, the sending of the adjustment control information to each type of power supply and adjustable load in the isolated network system based on the power unbalance amount of the isolated network system includes the following steps:
and when the power unbalance amount of the isolated network system exceeds the primary frequency modulation capacity of the generator set in the isolated network and is less than 0, sending adjustment information for increasing the power output and reducing the load to each type of power supply and adjustable load in the isolated network system.
And when the power unbalance of the isolated network system is more than 0, sending regulation information for reducing the power output and increasing the load to each type of power supply and adjustable load in the isolated network system.
The calculation formula of the primary frequency modulation capability of the generator set is as follows:
wherein, PfNFor the primary frequency modulation capability of the generator set, k1 and k2 are proportionality coefficients, PnRated power, P, of thermal power generating unitsmThe number of the thermal power generating units with primary frequency modulation capability in the network is N, the number of the thermal power generating units with primary frequency modulation capability in the network is M, the number of the thermal power generating units with primary frequency modulation capability in the network is N, and the number of the thermal power generating units with primary frequency modulation capability in the network is M.
Example 2
Based on the same inventive concept as embodiment 1, an embodiment of the present invention provides an industrial isolated network frequency adjusting apparatus, including:
the first calculation unit is used for calculating the unit regulation power of the isolated network system;
the acquisition unit is used for acquiring the real-time power grid frequency of the isolated network system;
the second calculation unit is used for calculating the power unbalance amount of the isolated network system based on the unit regulation power and the real-time power grid frequency when the change rate of the real-time power grid frequency of the isolated network system is smaller than a set threshold value and the real-time power grid frequency of the isolated network system is within a preset regulation interval;
and the adjusting control unit is used for comparing the power unbalance amount of the isolated network system with the primary frequency modulation capacity of the generator set, and sending adjusting control information to each type of power supply and adjustable load in the isolated network system based on the comparison result to complete the frequency adjustment of the industrial isolated network.
In a specific implementation manner of the embodiment of the present invention, the calculation formula of the power unbalance amount is:
ΔP＝k×KS×Δf
wherein, the delta P is the power unbalance amount, K is the proportionality coefficient, and K isSFor unit regulated power, Δ f is the real-time grid frequency.
In a specific implementation manner of the embodiment of the present invention, the adjustment control unit includes a first sub-adjustment control unit, and is configured to send adjustment information for increasing power output and reducing load to each type of power supply and adjustable load in the isolated network system according to a power unbalance amount when the power unbalance amount of the isolated network system exceeds a primary frequency modulation capability of a generator set in the isolated network and the power unbalance amount of the isolated network system is less than 0.
The adjusting control unit comprises a second sub-adjusting control unit and is used for sending adjusting information for reducing power output and increasing load to each type of power supply and adjustable load in the isolated network system according to the power unbalance when the power unbalance of the isolated network system exceeds the primary frequency modulation capacity of the generator set in the isolated network and the power unbalance of the isolated network system is larger than 0.
In a specific implementation manner of the embodiment of the present invention, a calculation formula of the primary frequency modulation capability of the generator set is as follows:
wherein, PfNFor the primary frequency modulation capability of the generator set, k1 and k2 are proportionality coefficients, PnRated power, P, of thermal power generating unitsmThe number of the thermal power generating units with primary frequency modulation capability in the network is N, the number of the thermal power generating units with primary frequency modulation capability in the network is M, the number of the thermal power generating units with primary frequency modulation capability in the network is N, and the number of the thermal power generating units with primary frequency modulation capability in the network is M.
Example 3
The embodiment of the invention provides an industrial isolated network frequency adjusting system which comprises a storage medium and a processor;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any of embodiment 1.
As will be appreciated by one skilled in the art, 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (11)
1. An industrial isolated network frequency adjusting method is characterized by comprising the following steps:
calculating unit adjusting power of the isolated network system;
acquiring real-time power grid frequency of the isolated grid system;
when the change rate of the real-time power grid frequency of the isolated network system is smaller than a set threshold value and the real-time power grid frequency of the isolated network system is within a preset adjusting interval, calculating the power unbalance amount of the isolated network system based on the unit adjusting power and the real-time power grid frequency;
and comparing the power unbalance amount of the isolated network system with the primary frequency modulation capacity of the generator set, and sending adjustment control information to each type of power supply and adjustable load in the isolated network system based on the comparison result to complete the frequency adjustment of the industrial isolated network under the condition of non-monitoring failure.
2. The industrial isolated network frequency adjusting method according to claim 1, characterized in that: the calculation formula of the power unbalance amount is as follows:
ΔP＝k×KS×Δf
wherein, the delta P is the power unbalance amount, K is the proportionality coefficient, and K isSFor unit adjustment power, Δ f is the difference between the real-time frequency and the standard frequency.
3. The industrial isolated network frequency adjusting method according to claim 1, characterized in that: the method comprises the following steps of comparing the power unbalance amount of the isolated network system with the primary frequency modulation capacity of a generator set, and sending adjustment control information to various types of power supplies and adjustable loads in the isolated network system based on the comparison result, wherein the method comprises the following steps:
and when the power unbalance amount of the isolated network system exceeds the primary frequency modulation capacity of the generator set in the isolated network and is less than 0, sending adjustment information for increasing the power output and reducing the load to each type of power supply and adjustable load in the isolated network system according to the power unbalance amount.
4. The industrial isolated network frequency adjusting method according to claim 3, characterized in that: the method comprises the following steps of comparing the power unbalance amount of the isolated network system with the primary frequency modulation capacity of a generator set, and sending adjustment control information to various types of power supplies and adjustable loads in the isolated network system based on the comparison result, and further comprises the following steps:
and when the power unbalance amount of the isolated network system exceeds the primary frequency modulation capacity of the generator set in the isolated network and is more than 0, sending regulation information for reducing the power output and increasing the load to each type of power supply and adjustable load in the isolated network system according to the power unbalance amount.
5. The industrial isolated network frequency adjusting method according to claim 1, characterized in that: the calculation formula of the primary frequency modulation capability of the generator set is as follows:
wherein, PfNFor the primary frequency modulation capability of the generator set, k1 and k2 are proportionality coefficients, PnRated power, P, of thermal power generating unitsmThe number of the thermal power generating units with primary frequency modulation capability in the network is N, the number of the thermal power generating units with primary frequency modulation capability in the network is M, the number of the thermal power generating units with primary frequency modulation capability in the network is N, and the number of the thermal power generating units with primary frequency modulation capability in the network is M.
6. An industrial isolated network frequency adjustment device, characterized by comprising:
the first calculation unit is used for calculating the unit regulation power of the isolated network system;
the acquisition unit is used for acquiring the real-time power grid frequency of the isolated network system;
the second calculation unit is used for calculating the power unbalance amount of the isolated network system based on the unit regulation power and the real-time power grid frequency when the change rate of the real-time power grid frequency of the isolated network system is smaller than a set threshold value and the real-time power grid frequency of the isolated network system is within a preset regulation interval;
and the adjusting control unit is used for comparing the power unbalance amount of the isolated network system with the primary frequency modulation capacity of the generator set, and sending adjusting control information to each type of power supply and adjustable load in the isolated network system based on the comparison result to complete the frequency adjustment of the industrial isolated network.
7. The industrial isolated network frequency regulating device according to claim 6, characterized in that: the calculation formula of the power unbalance amount is as follows:
ΔP＝k×KS×Δf
wherein, the delta P is the power unbalance amount, K is the proportionality coefficient, and K isSFor unit adjustment power, Δ f is the difference between the real-time frequency and the standard frequency.
8. The industrial isolated network frequency regulating device according to claim 6, characterized in that: the adjusting control unit comprises a first sub-adjusting control unit and is used for sending adjusting information for increasing power output and reducing load to each type of power supply and adjustable load in the isolated network system according to the power unbalance when the power unbalance of the isolated network system exceeds the primary frequency modulation capacity of the generator set in the isolated network and the power unbalance of the isolated network system is less than 0.
9. The industrial isolated network frequency regulating device according to claim 6, characterized in that: the adjusting control unit comprises a second sub-adjusting control unit and is used for sending adjusting information for reducing power output and increasing load to each type of power supply and adjustable load in the isolated network system according to the power unbalance when the power unbalance of the isolated network system exceeds the primary frequency modulation capacity of the generator set in the isolated network and the power unbalance of the isolated network system is larger than 0.
10. The industrial isolated network frequency regulating device according to claim 6, characterized in that: the calculation formula of the primary frequency modulation capability of the generator set is as follows:
wherein, PfNFor the primary frequency modulation capability of the generator set, k1 and k2 are proportionality coefficients, PnRated power, P, of thermal power generating unitsmThe number of the thermal power generating units with primary frequency modulation capability in the network is N, the number of the thermal power generating units with primary frequency modulation capability in the network is M, the number of the thermal power generating units with primary frequency modulation capability in the network is N, and the number of the thermal power generating units with primary frequency modulation capability in the network is M.
11. An industry isolated network frequency control system which characterized in that: comprising a storage medium and a processor;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any one of claims 1-5.
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| CN116191458A (en) * | 2022-12-07 | 2023-05-30 | 国网吉林省电力有限公司电力科学研究院 | Frequency control method and system based on isolated network operation of thermal power generating unit |
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| CN110323764A (en) * | 2019-07-30 | 2019-10-11 | 中冶南方都市环保工程技术股份有限公司 | Isolated Network System control method for stably operating based on energy-storage units and load control system |
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| CN104993490A (en) * | 2015-08-11 | 2015-10-21 | 湘潭大学 | Household load classification power grid friendly response control method |
| CN109980654A (en) * | 2019-03-18 | 2019-07-05 | 中国华电科工集团有限公司 | A kind of power grid high-frequency accident decline load prediction device and process |
| CN110323764A (en) * | 2019-07-30 | 2019-10-11 | 中冶南方都市环保工程技术股份有限公司 | Isolated Network System control method for stably operating based on energy-storage units and load control system |
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| CN109617124A (en) * | 2018-12-29 | 2019-04-12 | 中冶南方都市环保工程技术股份有限公司 | A kind of flexible load control method and system in island network black starting-up |
| CN116191458A (en) * | 2022-12-07 | 2023-05-30 | 国网吉林省电力有限公司电力科学研究院 | Frequency control method and system based on isolated network operation of thermal power generating unit |
| CN116191458B (en) * | 2022-12-07 | 2023-09-29 | 国网吉林省电力有限公司电力科学研究院 | Frequency control method and system based on isolated network operation of thermal power generating unit |
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Application publication date: 20201027 |