CN110611319A - Receiving-end power grid low-frequency emergency control method, master station and storage medium thereof - Google Patents
Receiving-end power grid low-frequency emergency control method, master station and storage medium thereof Download PDFInfo
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Abstract
The invention discloses a receiving-end power grid low-frequency emergency control method, a main station and a storage medium, wherein the method comprises the following steps: matching corresponding emergency control measures including starting a fan emergency power support mode and starting a direct current emergency power support mode from a preset control strategy table according to the obtained loss power of the direct current control protection system and the real-time frequency of the receiving-end power grid; for the fan emergency power support mode, determining an emergency power support distribution value of each wind power plant execution station according to wind power plant measurement and control information uploaded by each wind power plant collection station in real time; and for the direct-current emergency power support mode, determining the emergency power support distribution value of each direct-current control protection system in the receiving-end power grid according to the operation information of the non-fault direct-current control protection system, the emergency power support shortage after the emergency power support of the fan and the real-time frequency of the receiving-end power grid. The invention can effectively restrain the receiving-end power grid from generating low frequency.
Description
Technical Field
The invention belongs to the technical field of power grid regulation and control, and particularly relates to a receiving-end power grid low-frequency emergency control method, a master station and a storage medium thereof.
Background
With continuous feeding of extra-high voltage direct current and gradual increase of new energy ratio, a local conventional unit of a receiving-end power grid cannot be replaced by a large amount of new energy, so that the dynamic frequency regulation characteristic of the power grid is further deteriorated, and the capability of the power grid for defending against low-frequency chain reaction caused by high-power direct current blocking is reduced. At present, the emergency control means aiming at the low frequency of a receiving-end power grid caused by high-power direct-current blocking is less, on one hand, the pre-control is carried out by depending on the primary frequency modulation or direct-current running power of a conventional unit of the power grid, and the defects are that: 1) wind power continuously replaces a conventional set of a receiving-end power grid, the primary frequency modulation capability of the conventional set of the receiving-end power grid is continuously reduced, 2) direct current power is pre-controlled, so that new energy at a direct current sending end mainly based on new energy delivery cannot be delivered, the national new energy consumption is greatly influenced, and meanwhile, the load limitation caused by power shortage of part of the receiving-end power grid is caused; on the other hand, the control measures such as load shedding and the like are carried out by depending on two or three defense lines of the power grid, but a large amount of receiving-end power grid loads can be cut off by the two defense lines according to action instructions, and the receiving-end power grid loads are further cut off after the three defense lines spontaneously act, and other cascading failures can be caused.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a receiving-end power grid low-frequency emergency control method, a master station and a storage medium thereof, which can effectively inhibit the receiving-end power grid from generating low frequency.
In order to achieve the above purpose, the embodiment of the invention is realized by adopting the following technical scheme:
in a first aspect, an embodiment of the present invention provides a receiving-end power grid low-frequency emergency control method, including the following steps:
when receiving direct current blocking information sent by a direct current blocking substation, acquiring loss power of a direct current control protection system and operation information of a non-fault direct current control protection system;
matching corresponding emergency control measures including starting a fan emergency power support mode and starting a direct current emergency power support mode from a preset control strategy table according to the obtained loss power of the direct current control protection system and the real-time frequency of the receiving-end power grid;
for the fan emergency power support mode, determining an emergency power support distribution value of each wind power plant execution station according to wind power plant measurement and control information uploaded by each wind power plant collection station in real time;
and for the direct-current emergency power support mode, determining the emergency power support distribution value of each direct-current control protection system in the receiving-end power grid according to the operation information of the non-fault direct-current control protection system, the emergency power support shortage after the emergency power support of the fan and the real-time frequency of the receiving-end power grid.
With reference to the first aspect, further, the operation information of the non-fault dc control protection system includes: and the operating state and the maximum power adjustable quantity of the non-fault direct current control protection system are adjusted.
With reference to the first aspect, further, the control policy table is determined according to offline time domain simulation calculation or online time domain simulation calculation.
With reference to the first aspect, further, the condition for enabling the fan emergency power support mode includes:
the real-time frequency of the receiving-end power grid is not greater than a preset first starting threshold value;
and the number of the first and second electrodes,
the loss power of the direct current control protection system is greater than the bearable power shortage of the power grid;
wherein, the first starting threshold value should be larger than the low-frequency safety and stability limit.
With reference to the first aspect, further, the condition for enabling the dc emergency power support mode includes:
the real-time frequency of the receiving-end power grid is smaller than a preset second starting threshold value;
and the number of the first and second electrodes,
after the fan emergency power support, the emergency power support vacancy is larger than zero;
wherein: the second start threshold should be less than the first start threshold.
With reference to the first aspect, further, the wind farm measurement and control information includes: and (4) forecasting output of all wind power plants under the wind power plant collection station and actual adjustable quantity of the wind power plants.
With reference to the first aspect, further, the method for determining the emergency power support allocation value of each wind farm executive station includes:
calculating an emergency power support control target value according to equation (1):
Psupport of＝PLack of quota-PBear (1)
In the formula: pSupport ofIndicating an emergency power support control target value; pLack of quotaRepresenting the power loss of the direct current control protection system; pBearIndicating the bearable power shortage of the power grid;
calculating the support ratio of each wind power plant collection substation, and calculating the actual support power of each wind power plant collection substation based on the ratio:
△Pi＝λiPsupport of (3)
In the formula: lambda [ alpha ]iRepresenting the support duty ratio of the ith wind power plant collection substation;representing the predicted total output of the wind power plant uploaded to each wind power plant collection substation by the wind power plant execution station in real time; l represents a time period; t represents time, t is less than or equal to L;the predicted average value of the wind power output in the L time period of a certain wind power plant execution station under the ith wind power plant collection substation is represented; m represents the number of wind power plant collection substations, i is 1,2, … and M; n represents the number of wind power plant execution stations under the ith wind power plant collection substation; j represents the jth wind farm executive station under the ith wind farm collection substation, and j is 1,2, …, N; delta PiRepresenting the actual support power of each wind power plant collection substation;
calculating an emergency power support allocation value which is issued by a wind power plant collection station to each wind power plant execution station:
ΔPij＝λjΔPi (5)
in the formula: lambda [ alpha ]jRepresenting the emergency power support ratio of the jth wind power plant execution station under the ith wind power plant collection substation; delta PijRepresenting an emergency power support allocation value issued by a wind farm collection station to each wind farm execution station, if delta PijMore than or equal to actual adjustable quantity delta P of wind power plantij-TotalLet Δ Pij＝△Pij-Total。
With reference to the first aspect, further, the method for determining the emergency power support allocation value of each dc control protection system in the receiving end power grid includes:
if the emergency power support shortage delta P after the emergency power support of the fan is more than or equal to the sum P of the emergency power support of the non-fault direct current control protection systemmax-adjustable DCEach direct current control protection system supports according to the maximum power adjustable quantity; wherein: Δ P ═ PSupport of-PWind turbine actual-support， Pk-adjustable direct currentThe maximum value of the emergency power support of the kth direct current control protection system is set, and S is the number of the direct current control protection systems participating in the emergency power support;
otherwise, calculating and acquiring the emergency power support distribution value of each direct current control protection system according to the formula (6):
Pk-actual direct current＝μk△P (6)
Wherein: pk-actual direct currentIndicating the k-th direct current control protection system emergency power support distribution value; mu.skIndicating the k-th DC control protection system emergency power support ratio,
in a second aspect, an embodiment of the present invention provides a receiving-end power grid low-frequency emergency control master station, including the following modules:
an acquisition module: when receiving the direct current blocking information sent by the direct current blocking substation, the direct current blocking substation is used for acquiring the loss power of the direct current control protection system and the operation information of the non-fault direct current control protection system;
a matching module: the system comprises a control strategy table, a fan emergency power support mode, a direct current emergency power support mode and a power grid real-time frequency acquisition module, wherein the control strategy table is used for matching corresponding emergency control measures from the preset control strategy table according to the acquired direct current control protection system loss power and the received end power grid real-time frequency;
a first determination module: for the fan emergency power support mode, determining an emergency power support distribution value of each wind power plant execution station according to wind power plant measurement and control information uploaded by each wind power plant collection station in real time;
a second determination module: and for the direct current emergency power support mode, determining an emergency power support distribution value of each direct current control protection system in the receiving-end power grid according to the operation information of the non-fault direct current control protection system, the emergency power support shortage after the emergency power support of the fan and the real-time frequency of the receiving-end power grid.
In a third aspect, an embodiment of the present invention further provides a receiving-end grid low-frequency emergency control master station, including a processor and a storage medium;
the storage medium is used for storing instructions;
the processor is used for operating according to the instruction to execute the steps of the receiving-end power grid low-frequency emergency control method.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the foregoing receiving-end grid low-frequency emergency control method.
Compared with the prior art, the receiving-end power grid low-frequency emergency control method, the main station and the storage medium thereof provided by the embodiment of the invention have the following beneficial effects:
the method comprises the steps of matching corresponding emergency control measures from a preset control strategy table, wherein the emergency control measures comprise starting a fan emergency power support mode and starting a direct current emergency power support mode, fully utilizing the capability of quickly adjusting power electronic equipment such as a fan and a direct current control protection system, taking a direct current blocking signal as an emergency control starting condition, taking the power loss of the direct current control protection system and the drop frequency response of a receiving-end power grid after direct current blocking as criteria, effectively inhibiting the low-frequency problem of the receiving-end power grid, reducing the probability of the low-frequency problem of the receiving-end power grid, and effectively solving the problem of large-area power limitation of the receiving-end power grid after direct current blocking.
Drawings
Fig. 1 is a schematic structural diagram of a receiving-end grid low-frequency emergency control system suitable for use in an embodiment of the present invention;
fig. 2 is a flowchart of a method for controlling a low-frequency emergency of a receiving-end power grid according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the structural schematic diagram of a receiving-end grid low-frequency emergency control system suitable for the embodiment of the present invention includes an emergency control master station, a plurality of direct-current blocking information substations, a plurality of wind farm collection substations, and a plurality of wind farm execution stations, where each wind farm collection substation corresponds to a plurality of wind farm execution stations. In the embodiment of the invention, the substation in the power grid control system is used as the direct-current locking information substation, when direct-current locking occurs, the direct-current control protection system sends direct-current locking information to the emergency control main station through the direct-current locking information substation, and simultaneously, the direct-current control protection system uploads the loss power of the direct-current control protection system and the operation information of the non-fault direct-current control protection system to the emergency control main station in real time. Each wind power plant is provided with a measurement and control device capable of detecting operation information of the wind power plant in real time, a wind power plant execution station receives the operation information of the corresponding wind power plant and uploads the operation information to a wind power plant collection substation, the wind power plant collection substation uploads the operation information of the corresponding wind power plant collection substation to an emergency control main station, the emergency control main station can match emergency control measures according to a control strategy table and sends the emergency control measures to the corresponding wind power plant collection substation, and then the corresponding wind power plant collection substation sends an emergency action instruction to the corresponding wind power plant execution station to realize emergency control of the wind power plant.
The method for the low-frequency emergency control of the receiving-end power grid provided by the embodiment of the invention can be realized by adopting a control system shown in fig. 1, and an emergency control master station can match corresponding emergency control measures from a preset control strategy table according to the obtained loss power of a direct-current control protection system and the real-time frequency of the receiving-end power grid, wherein the emergency control measures comprise a fan emergency power support mode and a direct-current emergency power support mode; for the fan emergency power support mode, determining an emergency power support distribution value of each wind power plant execution station according to wind power plant measurement and control information uploaded by each wind power plant collection station in real time; and for the direct-current emergency power support mode, determining the emergency power support distribution value of each direct-current control protection system in the receiving-end power grid according to the operation information of the non-fault direct-current control protection system, the emergency power support shortage after the emergency power support of the fan and the real-time frequency of the receiving-end power grid.
As shown in fig. 2, a flow chart of a receiving-end grid low-frequency emergency control method according to an embodiment of the present invention is provided, which specifically includes the following steps:
the method comprises the following steps: when the direct current control protection system generates direct current blocking, the direct current blocking information substation sends direct current blocking information sent by the direct current control protection system to the emergency control main station;
step two: after receiving the direct current blocking information, the emergency control master station acquires the loss power of the direct current control protection system with direct current blocking and the operation information of the non-fault direct current control protection system through the direct current control protection system; the operation information of the non-fault direct current control protection system comprises: and the operating state and the maximum power adjustable quantity of the non-fault direct current control protection system are adjusted.
According to the obtained loss power of the direct current control protection system and the real-time frequency of the receiving-end power grid, matching corresponding emergency control measures from a preset control strategy table, specifically:
if the real-time frequency f of the receiving-end power grid is not greater than a preset first starting threshold value fset-1And the DC control protection system loses power PLack of quotaGreater than the bearable power shortage P of the power gridBearStarting the emergency power support mode of the fan; otherwise, the method is directly exited. Taking into account the low frequency safety stability limit fLow frequency-jx，fset-1Should be greater than fLow frequency-jx。
Step three: determining an emergency power support distribution value of each wind power plant execution station according to wind power plant measurement and control information uploaded by each wind power plant collection station in real time;
the measurement and control information of the wind power plant comprises the following steps: and (4) forecasting output of all wind power plants under the wind power plant collection station and actual adjustable quantity of the wind power plants. The specific method for determining the emergency power support allocation value of each wind power plant execution station comprises the following steps:
calculating an emergency power support control target value according to equation (1):
Psupport of＝PLack of quota-PBear (1)
In the formula: pSupport ofIndicating an emergency power support control target value; pLack of quotaRepresenting the power loss of the direct current control protection system; pBearIndicating the bearable power shortage of the power grid;
calculating the support ratio of each wind power plant collection substation, and calculating the actual support power of each wind power plant collection substation based on the ratio:
△Pi＝λiPsupport of (3)
In the formula: lambda [ alpha ]iRepresenting the support duty ratio of the ith wind power plant collection substation;representing the predicted total output of the wind power plant uploaded to each wind power plant collection substation by the wind power plant execution station in real time; l represents a time period; t represents time, t is less than or equal to L;the predicted average value of the wind power output in the L time period of a certain wind power plant execution station under the ith wind power plant collection substation is represented; m represents the number of wind power plant collection substations, i is 1,2, … and M; n represents the number of wind power plant execution stations under the ith wind power plant collection substation; j represents the jth wind farm executive station under the ith wind farm collection substation, and j is 1,2, …, N; delta PiRepresenting the actual support power of each wind power plant collection substation;
calculating an emergency power support allocation value which is issued by a wind power plant collection station to each wind power plant execution station:
ΔPij＝λjΔPi (5)
in the formula: lambda [ alpha ]jRepresenting the emergency power support ratio of the jth wind power plant execution station under the ith wind power plant collection substation; delta PijRepresenting an emergency power support allocation value issued by a wind farm collection station to each wind farm execution station, if delta PijMore than or equal to actual adjustable quantity delta P of wind power plantij-TotalLet Δ Pij＝△Pij-Total。
Step four: the real-time frequency f of the receiving-end power grid is collected again, and if the real-time frequency of the receiving-end power grid continuously decreases, the real-time frequency is smaller than a preset second starting threshold value fset-2And after the emergency power of the fan is supported, the emergency power support shortage is still larger than zero, and then a direct current emergency power support mode is started; otherwise, the method is directly exited. It should be understood that the second activation threshold fset-2Should be less than the first start threshold fset-1。
And determining the emergency power support distribution value of each direct current control protection system in the receiving-end power grid according to the operation information of the non-fault direct current control protection system, the emergency power support shortage after the emergency power support of the fan and the real-time frequency of the receiving-end power grid.
Step five: if the emergency power support shortage delta P after the emergency power support of the fan is more than or equal to the sum P of the emergency power support of the non-fault direct current control protection systemmax-adjustable DCEach direct current control protection system supports according to the maximum power adjustable quantity; wherein: Δ P ═ PSupport of-PWind turbine actual-support， Pk-adjustable direct currentThe maximum value of the emergency power support of the kth direct current control protection system is set, and S is the number of the direct current control protection systems participating in the emergency power support;
otherwise, calculating and acquiring the emergency power support distribution value of each direct current control protection system according to the formula (6):
Pk-actual direct current＝μk△P (6)
Wherein: pk-actual direct currentIndicating the k-th direct current control protection system emergency power support distribution value; mu.skIndicating the k-th DC control protection system emergency power support ratio,
in summary, the receiving-end grid low-frequency emergency control method provided in the embodiment of the present invention matches corresponding emergency control measures from a preset control strategy table, including enabling a fan emergency power support mode and enabling a dc emergency power support mode, fully utilizes the capability of fast adjustment of power electronic devices such as a fan and a dc control protection system, takes a dc blocking signal as an emergency control starting condition, and takes the power loss of the dc control protection system after dc blocking and the drop frequency response of the receiving-end grid as criteria, so as to effectively suppress the receiving-end grid low-frequency problem, reduce the probability of the receiving-end grid low-frequency problem, and effectively solve the problem of large-area power limitation of the receiving-end grid after dc blocking.
The embodiment of the invention also provides a receiving-end power grid low-frequency emergency control master station which can be used for executing the emergency control method, and the receiving-end power grid low-frequency emergency control master station specifically comprises the following modules:
an acquisition module: when receiving the direct current blocking information sent by the direct current blocking substation, the direct current blocking substation is used for acquiring the loss power of the direct current control protection system and the operation information of the non-fault direct current control protection system;
a matching module: the system comprises a control strategy table, a fan emergency power support mode, a direct current emergency power support mode and a power grid real-time frequency acquisition module, wherein the control strategy table is used for matching corresponding emergency control measures from the preset control strategy table according to the acquired direct current control protection system loss power and the received end power grid real-time frequency;
a first determination module: for the fan emergency power support mode, determining an emergency power support distribution value of each wind power plant execution station according to the measurement and control information of each wind power plant collection station collected in real time;
a second determination module: and for the direct current emergency power support mode, determining an emergency power support distribution value of each direct current control protection system in the receiving-end power grid according to the operation information of the non-fault direct current control protection system, the emergency power support shortage after the emergency power support of the fan and the real-time frequency of the receiving-end power grid.
As another embodiment of the present invention, a receiving-end grid low-frequency emergency control master station is also provided, which can be also used for executing the emergency control method described above, and includes a processor and a storage medium; the storage medium is used for storing instructions; the processor is configured to operate according to the instructions to perform the steps of the emergency control method described above.
As yet another embodiment of the present invention, there is also provided a computer-readable storage medium having a computer program stored thereon, characterized in that the program, when executed by a processor, implements the steps of the aforementioned emergency control method.
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.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (11)
1. A receiving-end power grid low-frequency emergency control method is characterized by comprising the following steps:
when receiving direct current blocking information sent by a direct current blocking substation, acquiring loss power of a direct current control protection system and operation information of a non-fault direct current control protection system;
matching corresponding emergency control measures including starting a fan emergency power support mode and starting a direct current emergency power support mode from a preset control strategy table according to the obtained loss power of the direct current control protection system and the real-time frequency of the receiving-end power grid;
for the fan emergency power support mode, determining an emergency power support distribution value of each wind power plant execution station according to wind power plant measurement and control information uploaded by each wind power plant collection station in real time;
and for the direct-current emergency power support mode, determining the emergency power support distribution value of each direct-current control protection system in the receiving-end power grid according to the operation information of the non-fault direct-current control protection system, the emergency power support shortage after the emergency power support of the fan and the real-time frequency of the receiving-end power grid.
2. The receiving-end grid low-frequency emergency control method according to claim 1, wherein the non-fault dc control protection system operation information includes: and the operating state and the maximum power adjustable quantity of the non-fault direct current control protection system are adjusted.
3. The receive-side grid low-frequency emergency control method according to claim 1, wherein the control policy table is determined according to an offline time domain simulation calculation or an online time domain simulation calculation.
4. The receiving-end grid low-frequency emergency control method according to claim 1, wherein the condition for enabling the wind turbine emergency power support mode comprises:
the real-time frequency of the receiving-end power grid is not greater than a preset first starting threshold value;
and the number of the first and second electrodes,
the loss power of the direct current control protection system is greater than the bearable power shortage of the power grid;
wherein, the first starting threshold value should be larger than the low-frequency safety and stability limit.
5. The receiving-end grid low-frequency emergency control method according to claim 4, wherein the condition for enabling the direct-current emergency power support mode comprises:
the real-time frequency of the receiving-end power grid is smaller than a preset second starting threshold value;
and the number of the first and second electrodes,
after the fan emergency power support, the emergency power support vacancy is larger than zero;
wherein: the second start threshold should be less than the first start threshold.
6. The receiving-end grid low-frequency emergency control method according to claim 1, wherein the wind farm measurement and control information includes: and (4) forecasting output of all wind power plants under the wind power plant collection station and actual adjustable quantity of the wind power plants.
7. The receiving-end grid low-frequency emergency control method according to claim 1, wherein the method for determining the emergency power support allocation value of each wind farm executive station comprises the following steps:
calculating an emergency power support control target value according to equation (1):
Psupport of＝PLack of quota-PBear (1)
In the formula: pSupport ofIndicating an emergency power support control target value; pLack of quotaRepresenting the power loss of the direct current control protection system; pBearIndicating the bearable power shortage of the power grid;
calculating the support ratio of each wind power plant collection substation, and calculating the actual support power of each wind power plant collection substation based on the ratio:
△Pi＝λiPsupport of (3)
In the formula: lambda [ alpha ]iRepresenting the support duty ratio of the ith wind power plant collection substation;representing the predicted total output of the wind power plant uploaded to each wind power plant collection substation by the wind power plant execution station in real time; l represents a time period; t represents time, t is less than or equal to L;the predicted average value of the wind power output in the L time period of a certain wind power plant execution station under the ith wind power plant collection substation is represented; m represents the number of wind power plant collection substations, i is 1,2, … and M; n represents the number of wind power plant execution stations under the ith wind power plant collection substation; j represents the jth wind farm executive station under the ith wind farm collection substation, and j is 1,2, …, N; delta PiRepresenting the actual support power of each wind power plant collection substation;
calculating an emergency power support allocation value which is issued by a wind power plant collection station to each wind power plant execution station:
ΔPij＝λjΔPi (5)
in the formula: lambda [ alpha ]jRepresenting the emergency power support ratio of the jth wind power plant execution station under the ith wind power plant collection substation; delta PijRepresenting an emergency power support allocation value issued by a wind farm collection station to each wind farm execution station, if delta PijMore than or equal to actual adjustable quantity delta P of wind power plantij-TotalLet Δ Pij＝△Pij-Total。
8. The grid-connected low-frequency emergency control method according to claim 7, wherein the method for determining the emergency power support distribution value of each dc control protection system in the grid-connected grid comprises:
if the fan is urgentThe emergency power support shortage quantity delta P after power support is more than or equal to the sum P of emergency power support of the non-fault direct current control protection systemmax-adjustable DCEach direct current control protection system supports according to the maximum power adjustable quantity; wherein: Δ P ═ PSupport of-PWind turbine actual-support，Pk-adjustable direct currentThe maximum value of the emergency power support of the kth direct current control protection system is set, and S is the number of the direct current control protection systems participating in the emergency power support;
otherwise, calculating and acquiring the emergency power support distribution value of each direct current control protection system according to the formula (6):
Pk-actual direct current＝μk△P (6)
Wherein: pk-actual direct currentIndicating the k-th direct current control protection system emergency power support distribution value; mu.skIndicating the k-th DC control protection system emergency power support ratio,
9. a receiving end power grid low-frequency emergency control master station is characterized by comprising the following modules:
an acquisition module: when receiving the direct current blocking information sent by the direct current blocking substation, the direct current blocking substation is used for acquiring the loss power of the direct current control protection system and the operation information of the non-fault direct current control protection system;
a matching module: the system comprises a control strategy table, a fan emergency power support mode, a direct current emergency power support mode and a power grid real-time frequency acquisition module, wherein the control strategy table is used for matching corresponding emergency control measures from the preset control strategy table according to the acquired direct current control protection system loss power and the received end power grid real-time frequency;
a first determination module: for the fan emergency power support mode, determining an emergency power support distribution value of each wind power plant execution station according to wind power plant measurement and control information uploaded by each wind power plant collection station in real time;
a second determination module: and for the direct current emergency power support mode, determining an emergency power support distribution value of each direct current control protection system in the receiving-end power grid according to the operation information of the non-fault direct current control protection system, the emergency power support shortage after the emergency power support of the fan and the real-time frequency of the receiving-end power grid.
10. A receiving end power grid low-frequency emergency control master station is characterized by comprising a processor and a storage medium;
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 to 8.
11. Computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910643974.4A CN110611319B (en) | 2019-07-17 | 2019-07-17 | Receiving-end power grid low-frequency emergency control method, master station and storage medium thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112104009A (en) * | 2020-08-27 | 2020-12-18 | 国网电力科学研究院有限公司 | New energy centralized frequency correction anti-misoperation method and system |
| CN112701698A (en) * | 2020-12-22 | 2021-04-23 | 国网电力科学研究院有限公司 | Fan transient frequency active supporting method and system for dealing with power grid fault and storage medium |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140032000A1 (en) * | 2012-07-30 | 2014-01-30 | Siemens Corporation | Power System Stabilization Using Distributed Inverters |
| CN104485675A (en) * | 2014-12-15 | 2015-04-01 | 华中科技大学 | Emergency DC control based inhibition method for power fluctuation peak of UHV (Ultra High Voltage) tieline |
| CN107919671A (en) * | 2017-10-18 | 2018-04-17 | 中国电力科学研究院有限公司 | Multi-infeed DC regional power grid frequency urgent control Strategy Simulation method and its system |
| CN108173276A (en) * | 2017-12-21 | 2018-06-15 | 国电南瑞科技股份有限公司 | The control method of low frequency after a kind of extensive wind turbine off-grid of reply |
| CN108199417A (en) * | 2017-12-27 | 2018-06-22 | 国电南瑞科技股份有限公司 | A kind of wind power plant of real-time fm capacity differentiation of wind turbine participates in system coordination method |
| CN108321818A (en) * | 2018-01-30 | 2018-07-24 | 国电南瑞科技股份有限公司 | More dc power Emergency Assistance coordination control strategies |
| CN108493995A (en) * | 2018-03-29 | 2018-09-04 | 国电南瑞科技股份有限公司 | The emergency control system and method for low frequency after meter and the reply direct current locking of wind turbine frequency modulation |
| CN108964144A (en) * | 2018-06-29 | 2018-12-07 | 国电南瑞科技股份有限公司 | Power shortage optimizes methodology after a kind of failure of more direct current sending end power grids |
-
2019
- 2019-07-17 CN CN201910643974.4A patent/CN110611319B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140032000A1 (en) * | 2012-07-30 | 2014-01-30 | Siemens Corporation | Power System Stabilization Using Distributed Inverters |
| CN104485675A (en) * | 2014-12-15 | 2015-04-01 | 华中科技大学 | Emergency DC control based inhibition method for power fluctuation peak of UHV (Ultra High Voltage) tieline |
| CN107919671A (en) * | 2017-10-18 | 2018-04-17 | 中国电力科学研究院有限公司 | Multi-infeed DC regional power grid frequency urgent control Strategy Simulation method and its system |
| CN108173276A (en) * | 2017-12-21 | 2018-06-15 | 国电南瑞科技股份有限公司 | The control method of low frequency after a kind of extensive wind turbine off-grid of reply |
| CN108199417A (en) * | 2017-12-27 | 2018-06-22 | 国电南瑞科技股份有限公司 | A kind of wind power plant of real-time fm capacity differentiation of wind turbine participates in system coordination method |
| CN108321818A (en) * | 2018-01-30 | 2018-07-24 | 国电南瑞科技股份有限公司 | More dc power Emergency Assistance coordination control strategies |
| CN108493995A (en) * | 2018-03-29 | 2018-09-04 | 国电南瑞科技股份有限公司 | The emergency control system and method for low frequency after meter and the reply direct current locking of wind turbine frequency modulation |
| CN108964144A (en) * | 2018-06-29 | 2018-12-07 | 国电南瑞科技股份有限公司 | Power shortage optimizes methodology after a kind of failure of more direct current sending end power grids |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112104009A (en) * | 2020-08-27 | 2020-12-18 | 国网电力科学研究院有限公司 | New energy centralized frequency correction anti-misoperation method and system |
| CN112701698A (en) * | 2020-12-22 | 2021-04-23 | 国网电力科学研究院有限公司 | Fan transient frequency active supporting method and system for dealing with power grid fault and storage medium |
| CN112701698B (en) * | 2020-12-22 | 2022-09-20 | 国网电力科学研究院有限公司 | Fan transient frequency active supporting method and system for dealing with power grid fault and storage medium |
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