CN114362254B - Method and device for adjusting channel delivery capacity of pure new energy collection system - Google Patents
Method and device for adjusting channel delivery capacity of pure new energy collection system Download PDFInfo
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Abstract
The application provides a method and a device for adjusting the channel sending-out capacity of a pure new energy collection system, which relate to the field of power transmission and comprise the following steps: determining a static voltage stability limit according to the running state of the pure new energy collection system; the running state comprises running parameters, running modes and active output distribution conditions; determining the system switching amount after the pure new energy collection system fails according to the static voltage stability limit and the active output level before the pure new energy collection system fails; and performing cutting operation according to the system cutting amount so as to adjust the delivery capacity of the pure new energy collecting system channel. The application can more accurately adjust the delivery capacity of the pure new energy collection system channel.
Description
Technical Field
The application relates to the field of power transmission, in particular to a method and a device for adjusting the channel delivery capacity of a pure new energy collection system.
Background
The new energy enrichment area mostly adopts a development mode of 'large-scale centralized development and high-voltage long-distance transmission' to develop new energy. In the development mode, the grid structure is weak at the tail end of the grid at the wind power and photovoltaic collecting system. For a pure new energy collection system, as no synchronous generator set exists in a near zone, the problem of stable power angle is solved, the problems of stable static voltage and transient overvoltage are very outstanding, and the power transmission capacity of a new energy delivery channel is seriously influenced, so that the comprehensive and accurate assessment of the actual system channel delivery capacity is a necessary premise for guaranteeing the safe operation of new energy.
The new energy delivery capacity has a typical short-plate effect, i.e. various constraint factors need to be comprehensively considered, and the lowest delivery capacity under the constraint factors is taken as the delivery capacity of the system. The traditional delivery capacity checking method independently decouples and considers each constraint factor, ignores the dependence and association relation existing between different constraints, leads to the trend of conservation of evaluation results, is unfavorable for fully playing the delivery capacity of the channel, and influences the efficient consumption of new energy.
Disclosure of Invention
Aiming at the problems in the prior art, the application provides a method and a device for adjusting the delivery capacity of a pure new energy collection system channel, which can more accurately adjust the delivery capacity of the pure new energy collection system channel.
In order to solve the technical problems, the application provides the following technical scheme:
in a first aspect, the present application provides a method for adjusting the delivery capacity of a pure new energy collection system channel, including:
Determining a static voltage stability limit according to the running state of the pure new energy collection system; the running state comprises running parameters, running modes and active output distribution conditions;
determining the system switching amount after the pure new energy collection system fails according to the static voltage stability limit and the active output level before the pure new energy collection system fails;
and performing cutting operation according to the system cutting amount so as to adjust the delivery capacity of the pure new energy collecting system channel.
Further, the determining the static voltage stability limit according to the operation state of the pure new energy collection system includes:
Generating a static voltage stability check working condition set according to the running state;
And determining the static voltage stability limit under different static voltage stability check working conditions in the static voltage stability check working condition set.
Further, the determining the static voltage stability limit under different static voltage stability check conditions in the static voltage stability check condition set includes:
determining a system active output limit corresponding to a lower limit of a voltage of a system end node under different reactive input amounts;
determining the static voltage stability limit of the pure new energy collection system under different reactive input amounts;
Determining a static voltage stability limit of the pure new energy collection system under reasonable reactive input according to the active output limit of the system and the static voltage stability limit;
And determining the static voltage stability limit under the static voltage stability check working condition according to the static voltage stability limit of the pure new energy collection system under the reasonable reactive input quantity and the thermal stability limit of the pure new energy collection system.
Further, the determining the system cut-off amount after the pure new energy collecting system fails according to the static voltage stability limit and the active output level before the pure new energy collecting system fails includes:
Determining a cutting slope after the pure new energy collection system fails according to the static voltage stability limit and the transient simulation cutting amount after the pure new energy collection system corresponding to the active power output of the initial working condition fails and the active power output of the initial working condition when cutting is not needed;
And determining the system cut-out amount after the pure new energy collection system fails according to the cut-out slope and the active output level.
In a second aspect, the present application provides a device for adjusting the delivery capacity of a pure new energy collection system channel, comprising:
the stability limit determining unit is used for determining a static voltage stability limit according to the running state of the pure new energy collecting system; the running state comprises running parameters, running modes and active output distribution conditions;
The system switching unit is used for determining the system switching amount after the pure new energy collecting system fails according to the static voltage stability limit and the active output level before the pure new energy collecting system fails;
and the delivery capacity adjusting unit is used for performing cutting operation according to the system cutting amount so as to adjust the delivery capacity of the pure new energy collecting system channel.
Further, the stability limit determining unit includes:
The working condition set generating module is used for generating a static voltage stability check working condition set according to the running state;
And the stability limit determining module is used for determining the stability limit of the static voltage under different static voltage stability checking working conditions in the static voltage stability checking working condition set.
Further, the stability limit determination module includes:
The voltage lower limit constraint lower output limit determining submodule is used for determining the system active output limit corresponding to the voltage lower limit of the system end node under different reactive input amounts;
The static voltage stability limit determining submodule is used for determining the static voltage stability limit of the pure new energy collecting system under different reactive input amounts;
the reasonable limit determination submodule is used for determining the static voltage stability limit of the pure new energy collection system under the reasonable reactive input according to the active output limit of the system and the static voltage stability limit;
and the final stability limit determination submodule is used for finally determining the static voltage stability limit under the static voltage stability check working condition according to the static voltage stability limit of the pure new energy collection system under the reasonable reactive input quantity and the thermal stability limit of the pure new energy collection system.
Further, the cutting amount determining unit includes:
The cut-off slope determining module is used for determining the cut-off slope of the pure new energy collection system after the pure new energy collection system fails according to the static voltage stability limit, the transient simulation cut-off quantity of the pure new energy collection system corresponding to the active output of the initial working condition and the active output of the initial working condition when the cut-off is just unnecessary;
and the cutting machine quantity determining module is used for determining the system cutting machine quantity after the pure new energy collecting system fails according to the cutting machine slope and the active output level.
In a third aspect, the present application provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method for adjusting the outgoing capacity of the pure new energy collection system channel when executing the program.
In a fourth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of a method for adjusting the outgoing capacity of a channel of the pure new energy harvesting system.
Aiming at the problems in the prior art, the method and the device for adjusting the delivery capacity of the pure new energy collection system channel can formulate a reasonable evaluation flow according to the actual operation characteristics of the collection system, give consideration to constraints such as thermal stability, static voltage stability and transient overvoltage, comprehensively evaluate the actual delivery capacity of the power transmission channel, give a reasonable switching strategy after a fault occurs, and ensure the safe and efficient consumption of new energy.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for adjusting the delivery capacity of a pure new energy collection system channel in an embodiment of the application;
FIG. 2 is a flow chart of determining a static voltage stability limit according to an embodiment of the present application;
FIG. 3 is a second flowchart for determining the static voltage stability limit according to an embodiment of the present application;
FIG. 4 is a flow chart of determining the cut of the system according to an embodiment of the present application;
FIG. 5 is a block diagram of a device for adjusting the delivery capacity of a pure new energy collection system channel in an embodiment of the present application;
Fig. 6 is a block diagram of a stability limit determining unit in the embodiment of the present application;
FIG. 7 is a block diagram of a stability limit determination module in an embodiment of the present application;
FIG. 8 is a block diagram of a cutting amount determining unit in an embodiment of the present application;
fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
FIG. 10 is a flow chart of a method for adjusting the delivery capacity of a pure new energy collection system according to an embodiment of the present application;
FIG. 11 is a schematic diagram of a static voltage limit calculation method under fixed reactive input in an embodiment of the application;
FIG. 12 is a schematic diagram of a method for determining the static voltage stability limit of the intersection method in an embodiment of the application;
fig. 13 shows the calculation result of the static voltage stability limit intersection method in the normal operation mode according to the embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. 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.
In an embodiment, referring to fig. 1, in order to more accurately adjust the output capability of a pure new energy collection system channel, the present application provides a method for adjusting the output capability of the pure new energy collection system channel, including:
s101: determining a static voltage stability limit according to the running state of the pure new energy collection system; the running state comprises running parameters, running modes and active output distribution conditions;
S102: determining the system switching amount after the pure new energy collection system fails according to the static voltage stability limit and the active output level before the pure new energy collection system fails;
s103: and performing cutting operation according to the system cutting amount so as to adjust the delivery capacity of the pure new energy collecting system channel.
It can be understood that the application provides a method for adjusting the channel delivery capacity of a pure new energy collection system, aiming at the problems existing in the prior art, and the general idea is to determine the new energy delivery limit of the pure new energy collection system in the normal operation state by taking the thermal stability constraint and the static voltage stability constraint of the pure new energy collection system as conditions. Further, based on this, it is checked whether the new energy output limit satisfies a transient voltage stability constraint. The transient voltage stability constraint includes, but is not limited to, whether the unit meets the transient overvoltage requirement or not, and whether the unit can repeatedly generate low voltage ride through phenomenon or not. Under the condition that the transient voltage stability constraint is not met, a new energy switching strategy for maintaining the transient voltage stability under different new energy output levels is further provided, so that safe and efficient consumption of new energy is better supported.
Specifically, referring to fig. 10, the method for adjusting the delivery capacity of the pure new energy collection system channel provided by the application includes: ① Forming a static voltage stable checking working condition set according to the running parameters, running modes and active output distribution conditions of the pure new energy collecting system; ② Setting up a steady-state simulation model of an actual pure new energy collection system, and calculating the static voltage stability limit of the pure new energy collection system based on an intersection point method by using the model; ③ Comparing the static voltage stability check result (static voltage stability limit) with the thermal stability constraint condition of the pure new energy collection system, and taking the minimum value as a channel sending capacity evaluation result of the pure new energy collection system in a normal running state; ④ Under some conditions, a pure new energy collection system may have faults, a transient voltage stability checking working condition set is required to be generated according to different fault types and fault positions, and the delivery capacity of a channel in a normal operation state is used as the initial active output of the system; ⑤ Constructing an actual transient simulation model of the pure new energy collection system, and checking transient voltage stability conditions of the pure new energy collection system under different fault types by adjusting new energy output to enable the model to meet initial voltage and initial active requirements; ⑥ And if the checking result does not meet the transient overvoltage requirement, the initial active power is reduced, the return ⑤;⑦ is performed to check whether the checking result enables the new energy unit after the fault to repeatedly enter the low-voltage traversing state, if the checking result does not meet the transient overvoltage requirement, the initial active power is reduced, the return ⑤;⑧ outputs the channel delivery capacity assessment result of the pure new energy collecting system, and the delivery capacity adjustment suggestion of the pure new energy collecting system under the fault condition, namely the cut-off quantity required by the pure new energy collecting system is given.
Based on the above, it can be understood that the method for adjusting the channel delivering capability of the pure new energy collecting system provided by the application determines the new energy delivering limit of the pure new energy collecting system in the normal running state under the condition of thermal stability constraint and static voltage stability constraint, and further provides a new energy control switching strategy for maintaining transient voltage stability under different new energy output levels under the condition that the pure new energy collecting system does not meet the transient voltage stability constraint. The method comprises the steps of calculating the static voltage stability limit of the pure new energy collecting system by using an intersection point method, specifically, intersecting a static voltage stability curve taking a certain margin under different reactive input amounts with a voltage lower limit curve of a terminal new energy station, and taking the intersection point of the static voltage stability curve, so that the reasonable reactive input amount of the pure new energy collecting system is determined, and the calculated static voltage stability limit meets the voltage lower limit requirement of the station. Finally, the transient voltage stability evaluation process can obtain the new energy cutting machine quantity corresponding to the maximum active power output and maintaining the transient voltage stability of the system and the initial working condition maximum active power output when cutting is unnecessary through simulation, and then calculate the slope of the cutting machine, thereby providing new energy cutting machine quantity suggestions corresponding to various faults under different initial active power output levels.
From the above description, the method for adjusting the delivery capacity of the pure new energy collection system channel provided by the application can formulate a reasonable evaluation flow according to the actual operation characteristics of the collection system, give consideration to constraints such as thermal stability, static voltage stability and transient overvoltage, comprehensively evaluate the actual delivery capacity of the power transmission channel, give a reasonable switching strategy after a fault occurs, and ensure the safe and efficient consumption of new energy.
In one embodiment, referring to fig. 2, determining the static voltage stability limit based on the operating state of the pure new energy collection system includes:
S201: generating a static voltage stability check working condition set according to the running state;
S202: and determining the static voltage stability limit under different static voltage stability check working conditions in the static voltage stability check working condition set.
It will be appreciated that referring to fig. 10, the operating state of the pure new energy collection system requires pre-collection of data to obtain. The data can provide the installed capacity of the pure new energy collection system, configuration parameters of the reactive power compensation device, main operation modes of the pure new energy collection system (such as whether the pure new energy collection system adopts single-channel delivery or double-channel delivery) and the active power output distribution situation of the pure new energy collection system (such as uniform output or non-uniform output). And generating a static voltage stability check working condition set according to the running state. The static voltage stability checking working condition set comprises the operating states, and each operating state represents one working condition. In the embodiment of the application, the static voltage stability limit under different static voltage stability check working conditions in the static voltage stability check working condition set is required to be respectively determined.
The method comprises the following specific steps of determining the static voltage stability limit under a certain working condition according to the running state of the pure new energy collection system:
① Firstly, the static voltage stability limit of a pure new energy collection system under a certain fixed reactive input amount needs to be determined. Referring to fig. 11, the pure new energy collection system may include a plurality of new energy sites. In the step, the new energy station keeps the reactive input of a fixed proportion unchanged, the active output of the new energy is increased, and the voltage of the key bus (the collecting station and the grid-connected point of the wind power station) is gradually reduced until the voltage collapses. The sum of new energy output corresponding to the inflection point of voltage critical breakdown is multiplied by a certain proportionality coefficient K (K is usually 0.9) to be used as the static voltage stability limit of the pure new energy collecting system under a certain fixed reactive input quantity
② And then determining the static voltage stability limit of the pure new energy collection system under a certain reasonable reactive input. Specifically, in one embodiment, referring to fig. 3, determining the static voltage stability limit under different static voltage stability check conditions in the set of static voltage stability check conditions includes: determining a system active output limit corresponding to a lower voltage limit of a system end node under different reactive input amounts (S301); determining a static voltage stability limit of the pure new energy collection system under different reactive input amounts (S302); determining a static voltage stability limit of the pure new energy collection system under reasonable reactive input according to the active output limit of the system and the static voltage stability limit (S303); and determining the static voltage stability limit under the static voltage stability check working condition according to the static voltage stability limit of the pure new energy collection system under the reasonable reactive input amount and the thermal stability limit of the pure new energy collection system (S304).
The process can be understood as determining the static voltage stability limit of the pure new energy collection system under the reasonable reactive input amount based on the intersection point method.
Because different reactive input amounts can be calculated to obtain different static voltage stability limits, for scheduling operation, a determined value of the static voltage stability limit is often required to be obtained and used as a reference limit value sent out by a section, so that a reasonable reactive input amount required for calculating the static voltage stability limit is required to be determined.
The application adopts the intersection method to determine the reasonable reactive input quantity of the pure new energy collection system, and is shown in figure 12. The first curve in fig. 12 is the new energy active power corresponding to the voltage of the terminal new energy station when the pure new energy collection system operates according to the lower limit of the voltage curve issued by the power regulation and control department under different reactive compensation input amounts; the second curve is the static voltage stability limit of the pure new energy collection system under different reactive compensation input amounts (the determination method is referred to above). And after considering the margin of a certain proportion coefficient K, correspondingly obtaining the active power of the new energy. And taking the reactive input quantity Q a corresponding to the intersection point of the two curves as a reasonable reactive input quantity required for calculating the static voltage stability limit of the pure new energy collection system. It can be understood that under the reactive input, the voltage of the terminal new energy station of the pure new energy collection system meets the lower limit requirement of the voltage curve issued by the electric power regulation and control department, and meanwhile, the total new energy active output of the pure new energy collection system meets the margin of taking a certain proportion coefficient K from the static voltage stability limit, and the intersection point corresponds toNamely, the static voltage stability limit of the pure new energy collection system under the reasonable reactive input amount is set as the equipment thermal stability limitTaking:
P max can be used as a new energy sending limit of the pure new energy collecting system in a normal running state when no fault occurs.
From the above description, the method for adjusting the channel delivering capacity of the pure new energy collecting system provided by the application can determine the static voltage stability limit according to the running state of the pure new energy collecting system.
In one embodiment, referring to fig. 4, determining the system cut-off after the failure of the pure new energy collection system according to the static voltage stability limit and the active output level before the failure of the pure new energy collection system includes:
s401: determining a cutting slope after the pure new energy collection system fails according to the static voltage stability limit and the transient simulation cutting amount after the pure new energy collection system corresponding to the active power output of the initial working condition fails and the active power output of the initial working condition when cutting is not needed;
S402: and determining the system cut-out amount after the pure new energy collection system fails according to the cut-out slope and the active output level.
It will be appreciated that the foregoing steps have established the static voltage stability limits of a pure new energy collection system. Sometimes, the pure new energy collection system fails. The method provided by the application aims to calculate how much cutting amount is needed by the pure new energy collection system to restore the normal running state under the fault type when the pure new energy collection system fails.
Specifically, a mode of comprehensively considering the static voltage stability limit and the P max of the equipment thermal stability limit as the maximum active power output of transient voltage stability assessment is used for checking whether the transient overvoltage of the system meets the requirement and whether a new energy unit repeatedly enters and exits the low voltage ride through state after different types of faults are checked based on transient simulation. If the requirements are not met, cutting the new energy after the fault, and gradually increasing the cutting amount until the transient voltage stability constraint condition is met.
For a certain fault type theta, when the transient voltage stability requirement is met, the transient simulation cutting machine quantity is set as And the cutting amount is corresponding to the maximum active force output mode under the fault theta. The active force of the initial working condition is reduced until the fault theta occurs, the system can meet the transient stability requirement without switching off, and the active force of the initial working condition is recorded as P 1 θ at the moment, so that the switching-off slope k θ corresponding to the fault theta can be obtained:
thus, a certain active output level P i of the system before the fault is obtained, and after the fault theta occurs, a corresponding new energy cutting machine quantity suggestion is obtained:
According to the formula (3), the cutting amount required by the pure new energy collecting system can be obtained under the condition that the type of the generated fault is theta.
From the above description, the method for adjusting the channel delivering capacity of the pure new energy collection system provided by the application can determine the system switching capacity of the pure new energy collection system after the pure new energy collection system is in fault according to the static voltage stability limit and the active output level of the pure new energy collection system before the pure new energy collection system is in fault.
To illustrate the usability of the method of the present application, an example will now be given.
For a pure new energy collection system at a transmitting end of an actual power grid, the channel transmitting limit and the transient voltage stabilizing switching strategy of the system can be calculated based on the method provided by the application. The calculation result of the static voltage stability limit intersection point method under the normal mode in the region is shown in fig. 13, the reactive input rate is 50.7%, and the active output of new energy is 1609.6MW. The main transformer in the region has a heat stability limit of 1125MW, and the channel in the region has a heat stability limit of 1125MW in a normal operation mode. The transient voltage stabilization switching strategy in the region is shown in table 1, and for different fault types, the new energy switching amount corresponding to the maximum active output mode (1125 MW) and the initial working condition maximum active output when switching is not needed are obtained through simulation. The cutting slope under the fault type can be calculated according to the formula (2), so that new energy cutting suggestions corresponding to various faults under a certain active output level can be obtained according to the formula (3). The method provided by the application can synthesize various influence constraints to obtain the new energy output limit under the normal running state without faults, and can provide control measures suggestion for enabling the system to meet the transient overvoltage requirement after the faults and not to generate repeated low voltage ride through of the unit for the corresponding working condition of the transient faults, so that the capacity of the power transmission channel is fully utilized as much as possible.
TABLE 1 control strategy suggestions after failure
From the above description, the application is based on ensuring safe and stable operation of the pure new energy collection system, and aims to fully utilize the capacity of the new energy delivery channel. The system static voltage stability limit is calculated based on the intersection method, and the reasonable reactive input of the system can be determined, so that the calculated static voltage stability limit meets the voltage lower limit requirement of the new energy station.
The transient voltage stability evaluation method of the pure new energy collection system and the control strategy generation method after the fault occurrence can provide a control measure suggestion that the system meets the transient overvoltage requirement after the fault and the repeated low voltage ride through of the unit does not occur. The comprehensive assessment method for the delivery capacity provided by the application has the advantages of sufficient consideration constraint, simple calculation process, clear application scene of calculation results and great supporting effect on actual production.
Based on the same inventive concept, the embodiment of the application also provides a device for adjusting the delivery capacity of the channel of the pure new energy collection system, which can be used for realizing the method described in the embodiment, as described in the following embodiment. The principle of the device for adjusting the channel sending out capacity of the pure new energy collection system for solving the problem is similar to that of the device for adjusting the channel sending out capacity of the pure new energy collection system, so that the implementation of the device for adjusting the channel sending out capacity of the pure new energy collection system can be seen from the implementation of the method based on the software performance benchmark, and repeated parts are omitted. As used below, the term "unit" or "module" may be a combination of software and/or hardware that implements the intended function. While the system described in the following embodiments is preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
In one embodiment, referring to fig. 5, in order to more accurately adjust the output capability of the pure new energy collection system channel, the present application provides an adjusting device for the output capability of the pure new energy collection system channel, which includes: a stability limit determination unit 501, a cut-off amount determination unit 502, and a delivery capability adjustment unit 503.
A stability limit determining unit 501, configured to determine a static voltage stability limit according to an operation state of the pure new energy collecting system; the running state comprises running parameters, running modes and active output distribution conditions;
The cut-off amount determining unit 502 is configured to determine a system cut-off amount after the pure new energy collecting system fails according to the static voltage stability limit and an active output level before the pure new energy collecting system fails;
And the delivery capacity adjusting unit 503 is used for performing cutting operation according to the system cutting amount so as to adjust the delivery capacity of the pure new energy collecting system channel.
In one embodiment, referring to fig. 6, the stability limit determining unit 501 includes: the working condition set generating module 601 and the stability limit determining module 602.
The working condition set generating module 601 is configured to generate a static voltage stability check working condition set according to the operation state;
the stability limit determining module 602 is configured to determine a stability limit of the static voltage under different static voltage stability check conditions in the set of static voltage stability check conditions.
In one embodiment, referring to fig. 7, the stability limit determination module 602 includes: a lower voltage limit constraint output limit determination sub-module 701, a static voltage stability limit determination sub-module 702, a reasonable limit determination sub-module 703, and a final stability limit determination sub-module 704.
The lower voltage limit constraint lower output limit determining submodule 701 is used for determining the system active output limit corresponding to the lower voltage limit of the system end node under different reactive input amounts;
a static voltage stability limit determination submodule 702, configured to determine a static voltage stability limit of the pure new energy collection system under different reactive input amounts;
a reasonable limit determination submodule 703, configured to determine a static voltage stability limit of the pure new energy collection system under a reasonable reactive input according to the active output limit of the system and the static voltage stability limit;
And the final stability limit determination submodule 704 is used for finally determining the static voltage stability limit under the static voltage stability check working condition according to the static voltage stability limit of the pure new energy collection system under the reasonable reactive input quantity and the thermal stability limit of the pure new energy collection system.
In one embodiment, referring to fig. 8, the cutting amount determining unit 502 includes: the cutter slope determination module 801 and the cutter amount determination module 802.
The cut-off slope determining module 801 is configured to determine a cut-off slope after the pure new energy collecting system fails according to the static voltage stability limit, the transient simulation cut-off amount after the pure new energy collecting system corresponding to the active power output of the initial working condition, and the active power output of the initial working condition when the cut-off is just unnecessary;
and a cut-off amount determining module 802, configured to determine a system cut-off amount after the pure new energy collecting system fails according to the cut-off slope and the active output level.
In order to more accurately adjust the output capability of a pure new energy collection system channel from a hardware aspect, the application provides an embodiment of an electronic device for implementing all or part of contents in an adjustment method of the output capability of the pure new energy collection system channel, wherein the electronic device specifically comprises the following contents:
A Processor (Processor), a Memory (Memory), a communication interface (Communications Interface), and a bus; the processor, the memory and the communication interface complete communication with each other through the bus; the communication interface is used for realizing information transmission between the adjusting device of the channel sending-out capacity of the pure new energy collection system and related equipment such as a core service system, a user terminal, a related database and the like; the logic controller may be a desktop computer, a tablet computer, a mobile terminal, etc., and the embodiment is not limited thereto. In this embodiment, the logic controller may refer to an embodiment of the method for adjusting the output capability of the pure new energy collection system channel in the embodiment, and an embodiment of the device for adjusting the output capability of the pure new energy collection system channel in the embodiment, and the contents thereof are incorporated herein, and the repetition is omitted.
It is understood that the user terminal may include a smart phone, a tablet electronic device, a network set top box, a portable computer, a desktop computer, a Personal Digital Assistant (PDA), a vehicle-mounted device, a smart wearable device, etc. Wherein, intelligent wearing equipment can include intelligent glasses, intelligent wrist-watch, intelligent bracelet etc..
In practical applications, part of the method for adjusting the delivery capacity of the pure new energy collection system channel may be performed on the electronic device side as described above, or all operations may be performed in the client device. Specifically, the selection may be made according to the processing capability of the client device, and restrictions of the use scenario of the user. The application is not limited in this regard. If all operations are performed in the client device, the client device may further include a processor.
The client device may have a communication module (i.e. a communication unit) and may be connected to a remote server in a communication manner, so as to implement data transmission with the server. The server may include a server on the side of the task scheduling center, and in other implementations may include a server on an intermediate platform, such as a server on a third party server platform having a communication link with the task scheduling center server. The server may include a single computer device, a server cluster formed by a plurality of servers, or a server structure of a distributed device.
Fig. 9 is a schematic block diagram of a system configuration of an electronic device 9600 according to an embodiment of the present application. As shown in fig. 9, the electronic device 9600 may include a central processor 9100 and a memory 9140; the memory 9140 is coupled to the central processor 9100. Notably, this fig. 9 is exemplary; other types of structures may also be used in addition to or in place of the structures to implement telecommunications functions or other functions.
In one embodiment, the method of adjusting the delivery capacity of the pure new energy collection system channel may be integrated into the cpu 9100. The central processor 9100 may be configured to perform the following control:
s101: determining a static voltage stability limit according to the running state of the pure new energy collection system; the running state comprises running parameters, running modes and active output distribution conditions;
S102: determining the system switching amount after the pure new energy collection system fails according to the static voltage stability limit and the active output level before the pure new energy collection system fails;
s103: and performing cutting operation according to the system cutting amount so as to adjust the delivery capacity of the pure new energy collecting system channel.
From the above description, the method for adjusting the delivery capacity of the pure new energy collection system channel provided by the application can formulate a reasonable evaluation flow according to the actual operation characteristics of the collection system, give consideration to constraints such as thermal stability, static voltage stability and transient overvoltage, comprehensively evaluate the actual delivery capacity of the power transmission channel, give a reasonable switching strategy after a fault occurs, and ensure the safe and efficient consumption of new energy.
In another embodiment, the adjusting device for the pure new energy collecting system channel output capability may be configured separately from the cpu 9100, for example, the adjusting device for the pure new energy collecting system channel output capability of the data composite transmission device may be configured as a chip connected to the cpu 9100, and the function of the adjusting method for the pure new energy collecting system channel output capability is implemented by the control of the cpu.
As shown in fig. 9, the electronic device 9600 may further include: a communication module 9110, an input unit 9120, an audio processor 9130, a display 9160, and a power supply 9170. It is noted that the electronic device 9600 need not include all of the components shown in fig. 9; in addition, the electronic device 9600 may further include components not shown in fig. 9, and reference may be made to the related art.
As shown in fig. 9, the central processor 9100, sometimes referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device, which central processor 9100 receives inputs and controls the operation of the various components of the electronic device 9600.
The memory 9140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, or other suitable device. The information about failure may be stored, and a program for executing the information may be stored. And the central processor 9100 can execute the program stored in the memory 9140 to realize information storage or processing, and the like.
The input unit 9120 provides input to the central processor 9100. The input unit 9120 is, for example, a key or a touch input device. The power supply 9170 is used to provide power to the electronic device 9600. The display 9160 is used for displaying display objects such as images and characters. The display may be, for example, but not limited to, an LCD display.
The memory 9140 may be a solid state memory such as Read Only Memory (ROM), random Access Memory (RAM), SIM card, etc. But also a memory which holds information even when powered down, can be selectively erased and provided with further data, an example of which is sometimes referred to as EPROM or the like. The memory 9140 may also be some other type of device. The memory 9140 includes a buffer memory 9141 (sometimes referred to as a buffer). The memory 9140 may include an application/function storage portion 9142, the application/function storage portion 9142 storing application programs and function programs or a flow for executing operations of the electronic device 9600 by the central processor 9100.
The memory 9140 may also include a data store 9143, the data store 9143 for storing data, such as contacts, digital data, pictures, sounds, and/or any other data used by an electronic device. The driver storage portion 9144 of the memory 9140 may include various drivers of the electronic device for communication functions and/or for performing other functions of the electronic device (e.g., messaging applications, address book applications, etc.).
The communication module 9110 is a transmitter/receiver 9110 that transmits and receives signals via an antenna 9111. The communication module (transmitter/receiver) 9110 is coupled to the central processor 9100 to provide an input signal and receive an output signal, which may be the same as in the case of a conventional mobile communication terminal.
Based on different communication technologies, a plurality of communication modules 9110, such as a cellular network module, a bluetooth module, and/or a wireless lan module, may be provided in the same electronic device. The communication module (transmitter/receiver) 9110 is also coupled to a speaker 9131 and a microphone 9132 via an audio processor 9130 to provide audio output via the speaker 9131 and to receive audio input from the microphone 9132 to implement usual telecommunications functions. The audio processor 9130 can include any suitable buffers, decoders, amplifiers and so forth. In addition, the audio processor 9130 is also coupled to the central processor 9100 so that sound can be recorded locally through the microphone 9132 and sound stored locally can be played through the speaker 9131.
The embodiment of the present application further provides a computer readable storage medium capable of implementing all the steps in the method for adjusting the delivery capacity of the pure new energy collection system channel in which the execution subject in the above embodiment is a server or a client, where the computer readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for adjusting the delivery capacity of the pure new energy collection system channel in which the execution subject in the above embodiment is a server or a client is implemented, for example, the processor implements the following steps when executing the computer program:
s101: determining a static voltage stability limit according to the running state of the pure new energy collection system; the running state comprises running parameters, running modes and active output distribution conditions;
S102: determining the system switching amount after the pure new energy collection system fails according to the static voltage stability limit and the active output level before the pure new energy collection system fails;
s103: and performing cutting operation according to the system cutting amount so as to adjust the delivery capacity of the pure new energy collecting system channel.
From the above description, the method for adjusting the delivery capacity of the pure new energy collection system channel provided by the application can formulate a reasonable evaluation flow according to the actual operation characteristics of the collection system, give consideration to constraints such as thermal stability, static voltage stability and transient overvoltage, comprehensively evaluate the actual delivery capacity of the power transmission channel, give a reasonable switching strategy after a fault occurs, and ensure the safe and efficient consumption of new energy.
It will be apparent to those skilled in the art that embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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 invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (8)
1. The method for adjusting the channel delivery capacity of the pure new energy collection system is characterized by comprising the following steps of:
Determining a static voltage stability limit according to the running state of the pure new energy collection system; the running state comprises running parameters, running modes and active output distribution conditions;
determining the system switching amount after the pure new energy collection system fails according to the static voltage stability limit and the active output level before the pure new energy collection system fails;
Performing cutting operation according to the system cutting amount to adjust the delivery capacity of the pure new energy collecting system channel;
The determining the system cut-off amount after the pure new energy collection system fails according to the static voltage stability limit and the active output level before the pure new energy collection system fails comprises the following steps:
determining the cutting slope after the pure new energy collection system fails according to the static voltage stability limit and the transient simulation cutting quantity after the pure new energy collection system fails and the initial working condition active output when the cutting is just unnecessary;
And determining the system cut-out amount after the pure new energy collection system fails according to the cut-out slope and the active output level.
2. The method for adjusting the channel outgoing capacity of a pure new energy collection system according to claim 1, characterized in that said determining the static voltage stability limit according to the operating state of the pure new energy collection system comprises:
Generating a static voltage stability check working condition set according to the running state;
And determining the static voltage stability limit under different static voltage stability check working conditions in the static voltage stability check working condition set.
3. The method for adjusting the output capacity of a pure new energy collection system according to claim 2, wherein the determining the static voltage stability limit under different static voltage stability check conditions in the set of static voltage stability check conditions includes:
determining a system active output limit corresponding to a lower limit of a voltage of a system end node under different reactive input amounts;
determining the static voltage stability limit of the pure new energy collection system under different reactive input amounts;
Determining a static voltage stability limit of the pure new energy collection system under reasonable reactive input according to the active output limit of the system and the static voltage stability limit;
And determining the static voltage stability limit under the static voltage stability check working condition according to the static voltage stability limit of the pure new energy collection system under the reasonable reactive input quantity and the thermal stability limit of the pure new energy collection system.
4. The utility model provides a pure new energy collection system passageway send out adjusting device of ability which characterized in that includes:
the stability limit determining unit is used for determining a static voltage stability limit according to the running state of the pure new energy collecting system; the running state comprises running parameters, running modes and active output distribution conditions;
The system switching unit is used for determining the system switching amount after the pure new energy collecting system fails according to the static voltage stability limit and the active output level before the pure new energy collecting system fails;
the delivery capacity adjusting unit is used for performing cutting operation according to the system cutting amount so as to adjust the delivery capacity of the pure new energy collecting system channel;
Wherein the cutting amount determining unit includes:
The cut-off slope determining module is used for determining the cut-off slope of the pure new energy collection system after the pure new energy collection system fails according to the transient simulation cut-off quantity of the pure new energy collection system corresponding to the static voltage stability limit and the active output of the initial working condition when the cut-off is just unnecessary;
and the cutting machine quantity determining module is used for determining the system cutting machine quantity after the pure new energy collecting system fails according to the cutting machine slope and the active output level.
5. The apparatus for adjusting the delivery capacity of a pure new energy collection system according to claim 4, wherein the stability limit determining unit comprises:
The working condition set generating module is used for generating a static voltage stability check working condition set according to the running state;
And the stability limit determining module is used for determining the stability limit of the static voltage under different static voltage stability checking working conditions in the static voltage stability checking working condition set.
6. The apparatus for adjusting the delivery capacity of a pure energy system according to claim 5, wherein the stability limit determination module comprises:
The voltage lower limit constraint lower output limit determining submodule is used for determining the system active output limit corresponding to the voltage lower limit of the system end node under different reactive input amounts;
The static voltage stability limit determining submodule is used for determining the static voltage stability limit of the pure new energy collecting system under different reactive input amounts;
the reasonable limit determination submodule is used for determining the static voltage stability limit of the pure new energy collection system under the reasonable reactive input according to the active output limit of the system and the static voltage stability limit;
and the final stability limit determination submodule is used for finally determining the static voltage stability limit under the static voltage stability check working condition according to the static voltage stability limit of the pure new energy collection system under the reasonable reactive input quantity and the thermal stability limit of the pure new energy collection system.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method for adjusting the outgoing capacity of the pure new energy collecting system channel according to any one of claims 1 to 3 when said program is executed by said processor.
8. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the method for adjusting the outgoing capacity of a pure new energy collecting system channel according to any one of claims 1 to 3.
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| WO2017092527A1 (en) * | 2015-12-02 | 2017-06-08 | 国电南瑞科技股份有限公司 | Online evaluation method of safety margin of operating reserve in power system |
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| WO2017092527A1 (en) * | 2015-12-02 | 2017-06-08 | 国电南瑞科技股份有限公司 | Online evaluation method of safety margin of operating reserve in power system |
| CN106340907A (en) * | 2016-09-30 | 2017-01-18 | 国家电网公司 | Power system security and stability control strategy determining method and device |
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