CN113452035B - Frequency modulation control method, frequency modulation control device, frequency modulation control storage medium, and frequency modulation control program product - Google Patents
Frequency modulation control method, frequency modulation control device, frequency modulation control storage medium, and frequency modulation control program product Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/002—Flicker reduction, e.g. compensation of flicker introduced by non-linear load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
Abstract
The application discloses a frequency modulation control method, frequency modulation control equipment, a storage medium and a program product. The method comprises the following steps: acquiring the frequency of the multi-path outgoing lines; determining a primary frequency modulation configuration mode; determining a target frequency corresponding to the primary frequency modulation configuration mode from the frequencies of the multi-path outgoing lines according to the primary frequency modulation configuration mode; and calculating the target power of the power station according to the target frequency, and performing primary frequency modulation according to the target power of the power station. According to the method, the primary frequency modulation configuration modes are determined, the target frequency of the preferred measuring device is selected from the frequencies of the multipath outgoing lines for primary frequency modulation according to the preset rule corresponding to each primary frequency modulation configuration mode, the defect that primary frequency modulation is refused or the power loss of the internet is caused when the frequencies of the primary frequency measurement device and other secondary frequency measurement devices are different due to the fact that the frequency of the primary frequency measurement device is only selected as the target frequency for primary frequency modulation in the existing primary frequency modulation method is overcome, and the primary frequency modulation response reliability is improved.
Description
Technical Field
The present disclosure relates to the field of frequency modulation technologies of power stations, and in particular, to a frequency modulation control method, apparatus, storage medium, and program product.
Background
In the existing new energy power station transmission process, due to the fact that the new energy power station is matched with the capacity of a transformer substation and the like, some new energy power stations are connected to the transformer substation by adopting a multi-path outgoing line structure for power generation. Wherein the outgoing line represents a transmission line.
When the frequency of the power station power grid once deviates from the rated value, primary frequency modulation needs to be started to keep the power grid frequency stable. The existing primary frequency modulation method takes the measured frequency of the main frequency measurement device as the power station frequency, calculates target power according to the power station frequency, and then carries out primary frequency modulation.
According to the existing primary frequency modulation method, the overall target power of the power station is determined by the measurement frequency of the main frequency measurement device. When the frequency measured by the main frequency measuring device does not cross the primary frequency modulation dead zone, but the frequency measured by other frequency measuring devices crosses the primary frequency modulation dead zone, the primary frequency modulation is not carried out by the power station according to the existing method, so that the primary frequency modulation is refused to operate; when the measurement frequency of the main frequency measuring device exceeds the primary frequency modulation dead zone, but the measurement frequency of other frequency measuring devices does not exceed the primary frequency modulation dead zone, the primary frequency modulation is carried out on the power station according to the existing method, and the condition of network power loss can be possibly caused. It can be seen that the reliability is poor by adopting the existing primary frequency modulation method in the power station of the multi-channel outgoing line.
Disclosure of Invention
The embodiment of the application aims to improve the reliability of primary frequency modulation in a power station with multiple outgoing lines by providing a frequency modulation control method, equipment, a storage medium and a program product.
The embodiment of the application provides a frequency modulation control method applied to a power station with a plurality of outgoing lines, which comprises the following steps:
acquiring the frequency of the multi-path outgoing lines; determining a primary frequency modulation configuration mode;
determining a target frequency corresponding to the primary frequency modulation configuration mode from the frequencies of the multi-path outgoing lines according to the primary frequency modulation configuration mode;
and calculating the target power of the power station according to the target frequency, and performing primary frequency modulation according to the target power of the power station.
In some embodiments, according to the primary frequency modulation configuration mode, the step of determining a target frequency corresponding to the primary frequency modulation configuration mode from the frequencies of the multiple outgoing lines includes:
judging the minimum frequency of the frequencies of the multi-path outgoing lines and the rated frequency of the power grid;
and if the minimum frequency is greater than or equal to the rated frequency of the power grid, selecting a corresponding target frequency from the frequencies of the multi-path outgoing lines according to the primary frequency modulation configuration mode.
In some embodiments, the frequency modulation control method further comprises: and if the minimum frequency is smaller than the rated frequency of the power grid, determining the minimum frequency as a target frequency.
In some embodiments, the selecting the corresponding target frequency from the frequencies of the multiplexed outgoing lines according to the primary frequency modulation configuration mode includes:
and if the primary frequency modulation configuration mode is a primary frequency modulation response priority mode, determining the maximum frequency in the frequencies of the multiple sending-out lines as a target frequency.
In some embodiments, the selecting the corresponding target frequency from the frequencies of the multiplexed outgoing lines according to the primary frequency modulation configuration mode includes:
and if the primary frequency modulation configuration mode is a network power priority mode, determining the frequency which is the smallest in deviation from the rated frequency of the power grid in the frequency of the multi-path outgoing line as a target frequency.
In some embodiments, the selecting the corresponding target frequency from the frequencies of the multiplexed outgoing lines according to the primary frequency modulation configuration mode includes:
if the primary frequency modulation configuration mode is a primary frequency modulation and internet surfing electric quantity compatible mode, judging whether frequencies in a primary frequency modulation dead zone exist in the frequencies of the multi-channel outgoing lines;
and if at least one frequency which is positioned in the primary frequency modulation dead zone exists in the frequency of the multi-channel outgoing line, selecting a target frequency corresponding to the primary frequency modulation and internet surfing electric quantity compatible mode.
In some embodiments, selecting a target frequency corresponding to the primary frequency modulation and internet surfing power compromise mode includes:
and excluding the frequency in the primary frequency modulation dead zone, and selecting the frequency which is the smallest from the rated frequency of the power grid among the frequencies of the rest multipath outgoing lines as the target frequency.
In some embodiments, after the step of determining whether there is a frequency located in the primary frequency modulation dead zone in the frequencies of the multiple outgoing lines, the method further includes:
and if the frequencies of the multi-path outgoing lines are all outside the primary frequency modulation dead zone, determining the frequency which is the smallest in deviation from the rated frequency of the power grid in the frequencies of the multi-path outgoing lines as the target frequency.
In some embodiments, before the step of determining the primary frequency modulation configuration mode, the method further comprises:
judging the relation between the difference value of the maximum frequency and the minimum frequency in the frequencies of the multi-path outgoing lines and a preset value;
and if the difference value between the maximum frequency and the minimum frequency in the frequencies of the multi-path outgoing lines is smaller than or equal to the preset value, determining a primary frequency modulation configuration mode.
In some embodiments, the frequency modulation control method further comprises:
if the difference between the maximum frequency and the minimum frequency in the frequencies of the multiple outgoing lines is larger than the preset value, terminating the primary frequency modulation operation and sending out a fault signal of the frequency measuring device.
The application also provides a frequency modulation control device, which comprises a processor, a memory electrically connected with the processor and a frequency modulation control program which is stored on the memory and can run on the processor; and the frequency modulation control program realizes the steps of the frequency modulation control method when being executed by the processor.
The present application also proposes a computer readable storage medium storing one or more programs executable by one or more processors to implement steps in a frequency modulation control method as described.
The application also proposes a computer program product comprising a computer program which, when executed by a processor, implements the steps of the frequency modulation control method.
According to the method, the primary frequency modulation configuration modes are determined, the target frequency of the preferred measuring device is selected from the frequencies of the multipath outgoing lines for primary frequency modulation according to the preset rule corresponding to each primary frequency modulation configuration mode, the defect that primary frequency modulation is refused or the power loss of the internet is caused when the frequencies of the primary frequency measurement device and other secondary frequency measurement devices are different due to the fact that the frequency of the primary frequency measurement device is only selected as the target frequency for primary frequency modulation in the existing primary frequency modulation method is overcome, and the primary frequency modulation response reliability is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art primary frequency modulation of a power plant having multiple outgoing lines;
FIG. 2 shows a primary frequency modulation active-frequency droop characteristic;
FIG. 3 is a block flow diagram of an embodiment one of a FM control method in accordance with one aspect of the present disclosure;
FIG. 4 is a block flow diagram of a second embodiment of a FM control method according to one aspect of the present disclosure;
FIG. 5 is a block flow diagram of a third embodiment of a FM control method according to one aspect of the present disclosure;
FIG. 6 is a block flow diagram of a fourth embodiment of a FM control method according to one aspect of the present disclosure;
FIG. 7 is a block flow diagram of a fifth embodiment of a FM control method according to one aspect of the present disclosure;
FIG. 8 is a block flow diagram of one embodiment of step S324 of a FM control method according to one aspect of the present disclosure;
FIG. 9 is a block flow diagram of a sixth embodiment of a method of FM control in accordance with an aspect of the present disclosure;
FIG. 10 is a hardware block diagram of one embodiment of a FM control device according to one aspect of the present disclosure;
fig. 11 is a schematic block diagram of an embodiment of a fm control device according to an aspect of the disclosure.
Detailed Description
In order that the above-described aspects may be better understood, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The term in this application mainly includes "primary frequency modulation", "internet power", "new energy power station".
It should be noted that, the term "primary frequency modulation" in this application refers to an automatic control process that, once the frequency of the power grid deviates from the rated value, the control system of the unit in the power grid automatically controls the increase or decrease of the active power of the unit, limiting the change of the frequency of the power grid and maintaining the frequency of the power grid stable.
The term "on-line electricity quantity" in the present application refers to the electricity quantity input to a power supply enterprise (power grid) by a power station at an on-line electricity quantity metering point, i.e. the electricity quantity sold by the power station to the power supply enterprise.
The term "new energy power station" in this application refers to a power station that uses the prior art to achieve power generation by using new energy sources such as solar energy, biomass energy, wind energy, geothermal energy, wave energy, ocean current energy, or tidal energy.
At present, a new energy power station for a plurality of outgoing lines mainly adopts n frequency measuring devices to correspondingly measure the frequencies of the n outgoing lines. The n frequency measuring devices comprise a main frequency measuring device and other n-1 secondary frequency measuring devices, and the sum of all the power of the sending lines is used as the actual power of the new energy power station. The existing primary frequency modulation method takes the measured frequency of a main frequency measuring device as a target frequency, and then carries out primary frequency modulation.
According to the existing primary frequency modulation method, the overall target power of the power station is determined by the measurement frequency of the main frequency measurement device. Referring to fig. 1, a primary frequency modulation of a photovoltaic power station with multiple outgoing lines is shown, a frequency measurement device 1 is a main frequency measurement device, a real-time frequency f=f1 of the photovoltaic power station, and real-time active power isAccording to the existing primary frequency modulation method, the overall target power of the power station is determined by the measurement frequency of the main frequency measurement device, please refer to fig. 2, and the target power of the power station can be obtained according to the primary frequency modulation active-frequency droop characteristic curve based on the measurement frequency of the main frequency measurement device, namely:
in formula a: f (f) L ＝50-f d ；f H ＝50+f d The method comprises the steps of carrying out a first treatment on the surface of the Frequency interval f L -f H The frequency interval (f in fig. 3 L ，f H ) I.e. 49.95Hz-50.05Hz, represents a primary frequency modulation dead zone. f (f) d Representing the primary frequency modulation dead zone coefficient. It should be appreciated that the primary frequency modulation dead zone coefficient is a fixed value, which may be set according to the actual situation, and in some embodiments, may be set to 0.05, for example; f (f) N The rated frequency of the power grid, namely the mains frequency of 50hz in China; p (P) e Rated capacity of a primary frequency modulation control object; delta% is a new energy primary frequency modulation difference adjustment coefficient; p (P) 0 The active power initial value of the primary frequency modulation control object is shown.
Under the condition that the measurement error of the frequency meter is met (the common requirement is less than or equal to 0.003 Hz), the active-frequency droop characteristic of the primary frequency modulation is obtained, when the frequency measured by the main frequency measuring device is larger, the target power of the power station is smaller, and the power on the network is smaller during the primary frequency modulation. When the frequency measured by the main frequency measuring device does not cross the primary frequency modulation dead zone, but the frequency measured by other frequency measuring devices crosses the primary frequency modulation dead zone, the primary frequency modulation is not carried out by the power station according to the existing method, so that the primary frequency modulation is refused to operate; when the measurement frequency of the main frequency measuring device exceeds the primary frequency modulation dead zone, but the measurement frequency of other frequency measuring devices does not exceed the primary frequency modulation dead zone, the primary frequency modulation is carried out on the power station according to the existing method, and the condition of network power loss can be possibly caused. It can be seen that the reliability is poor by adopting the existing primary frequency modulation method in the power station of the multi-channel outgoing line.
Accordingly, in view of the above, the present application proposes a frequency modulation control method, apparatus, storage medium and program product, aiming at improving the reliability of primary frequency modulation in a power station for multiplexing outgoing lines.
Referring to fig. 3, a first embodiment of the frequency modulation control method of the present application is provided for primary frequency modulation of the grid frequency in a power plant with multiple outgoing lines.
The frequency modulation control method of the embodiment comprises the following steps:
s100, acquiring the frequency of a plurality of outgoing lines;
specifically, the frequencies of the multiplex outgoing lines are measured by a plurality of frequency measuring devices. Specifically, the plurality of frequency measurement devices include a primary frequency measurement device and other secondary frequency measurement devices. And sequencing the frequency measured by the main frequency measuring device and the frequency measured by other secondary frequency measuring devices. For example, the frequencies of the five outgoing lines were measured to be 50.23Hz,49.32Hz,49.45Hz,50.01Hz, and 51.01Hz, respectively. The frequencies of the five outgoing lines can be ordered from small to large as 49.32Hz,49.45Hz,50.01Hz,50.23Hz, and 51.01Hz. It will be appreciated that the frequencies of the five outgoing lines will also be ordered from large to small.
S200, determining a primary frequency modulation configuration mode;
specifically, the primary frequency modulation configuration mode in this embodiment includes a primary frequency modulation response priority mode, a network power priority mode, and a primary frequency modulation and network power compatible mode. In this embodiment, each primary frequency modulation configuration mode corresponds to a preset rule for selecting a target frequency from the frequencies of the multiple outgoing lines.
By determining the primary frequency modulation configuration mode, a preset rule for selecting a target frequency from the frequencies of the multiple outgoing lines is determined. It will be appreciated that in some embodiments the chirped configuration mode may be determined by receiving user input or selection of the chirped configuration mode via an input device such as a Keyboard (Keyboard), touch screen, or the like. In addition, the primary frequency modulation configuration mode input or selected by the user can be received by voice input, so as to determine the primary frequency modulation configuration mode.
S300, determining a target frequency corresponding to the primary frequency modulation configuration mode from the frequencies of the multi-channel outgoing lines according to the primary frequency modulation configuration mode;
it will be appreciated that each of the chirped configuration modes represents a different requirement, and thus a different preset rule for selecting the target frequency from the frequency of the multiplexed outgoing line. For example, in the case where the minimum frequency of the frequencies of the multiplexed outgoing lines is greater than or equal to the grid rated frequency (i.e., 50 Hz), the primary frequency modulation response priority mode indicates priority response primary frequency modulation. That is, as long as any one of the primary or other secondary frequency measuring devices detects that the frequency crosses the primary frequency modulation dead zone (i.e., the frequency is at 50+f) d Power station machine (out of 50.05 Hz)The group control system responds to the primary frequency modulation and selects the measurement frequency which deviates from the rated frequency of the power grid to be the maximum as the target frequency; the network-surfing electric quantity priority mode mainly aims at guaranteeing network-surfing electric quantity of a power station in primary frequency modulation, and can select the frequency which deviates from the rated frequency of a power grid to be the minimum as a target frequency for primary frequency modulation, and the smaller the deviation from the rated frequency of the power grid is, the smaller the target power of the power station is caused to be reduced, so that the network-surfing electric quantity of the power station in the primary frequency modulation period is improved; the mode of primary frequency modulation and internet surfing electric quantity gives consideration to the primary frequency modulation priority and the internet surfing electric quantity. When all frequencies are outside the primary frequency modulation dead zone, the target power of the power station can be reduced by selecting the measurement frequency with the smallest deviation from the rated frequency of the power grid; when the primary frequency modulation dead zone frequency exists, the part of the measurement frequency is ignored, and the measurement frequency with the smallest deviation from the rated frequency of the power grid is selected as the target frequency from the rest measurement frequencies.
S400, calculating the target power of the power station according to the target frequency, and performing primary frequency modulation according to the target power of the power station.
The target frequency selected in step S300 is combined with the primary frequency modulation active-frequency droop characteristic, that is, the target frequency is substituted into the above formula a to obtain the target power of the power station, so as to perform primary frequency modulation.
The conventional method for performing primary frequency modulation by taking the frequency measured by the main frequency measuring device as the target frequency in the power station of the multipath outgoing line is not capable of selecting the most suitable frequency as the target frequency to perform primary frequency modulation when the frequency of the main frequency measuring device and the frequency of other secondary frequency measuring devices are different, so that the situations of primary frequency modulation refusal, loss of network electric quantity and the like are easy to occur.
Based on the same inventive concept, please refer to fig. 4, the present application further proposes a second embodiment, which is based on the first embodiment.
Example two
The frequency modulation control method of the embodiment comprises the following steps:
the step S300 specifically includes:
s310, judging the minimum frequency of the frequencies of the multi-path outgoing lines and the rated frequency of the power grid;
s320, if the minimum frequency is greater than or equal to the rated frequency of the power grid, selecting a corresponding target frequency from the frequencies of the multi-path outgoing lines according to the primary frequency modulation configuration mode;
s330, if the minimum frequency is smaller than the rated frequency of the power grid, determining the minimum frequency as a target frequency.
Referring to fig. 2, fig. 2 shows a primary active-frequency droop characteristic, according to which the power plant grid frequency is lower than the primary up-regulation dead zone value (50-f d =49.95 Hz), the primary frequency modulation response of the power plant requires the power generated by the power plant to be boosted. Under the above conditions, the target frequency simultaneously meets the primary frequency modulation response priority and the internet power priority. Therefore, when the minimum frequency of the frequencies of the collected multiple outgoing lines is less than the rated frequency of the power grid (i.e. 50 Hz), the target frequency=minimum frequency is set, and the minimum frequency of the frequencies of the multiple outgoing lines can simultaneously meet primary frequency modulation priority and internet surfing electric quantity priority requirements. The method can improve the Internet surfing electric quantity during primary frequency modulation of the power station while meeting the primary frequency modulation response. And when the minimum frequency in the frequency of the multi-channel outgoing line is more than or equal to the rated frequency of the power grid, determining the target frequency according to different frequency modulation configuration modes.
When the minimum frequency in the frequency of the multi-path outgoing line is smaller than the rated frequency of the power grid, setting the target frequency as the minimum frequency in the frequency of the multi-path outgoing line, and at the moment, using the minimum frequency in the frequency of the multi-path outgoing line can simultaneously meet the primary frequency modulation priority and the network power priority requirements, and improving the network power during primary frequency modulation of the power station while meeting the primary frequency modulation response.
Based on the same inventive concept, please refer to fig. 5, the present application further proposes a third embodiment, which is based on the first embodiment.
Example III
Selecting a corresponding target frequency from the frequencies of the multiple outgoing lines according to the primary frequency modulation configuration mode comprises:
s321, if the primary frequency modulation configuration mode is a primary frequency modulation response priority mode, determining the maximum frequency in the frequencies of the multiple sending-out lines as a target frequency.
Specifically, if the minimum frequency of the multiple outgoing lines is greater than or equal to the rated frequency (and 50 Hz) of the power grid and the primary frequency modulation configuration mode is the primary frequency modulation response priority mode, only the measurement frequency of one frequency measurement device in the frequency of the multiple outgoing lines exceeds the primary frequency modulation dead zone (i.e. the frequency is 50+f d = 50.05 Hz), the generator set control system should respond to primary frequency modulation. And in order to ensure the supporting capability of the power station to the power station unit control system during primary frequency modulation, selecting the measurement frequency which deviates from the rated frequency of the power grid by the maximum as a target frequency, namely setting the target frequency=the maximum frequency, and selecting the maximum frequency of the multi-path outgoing lines as the target frequency of the power station for primary frequency modulation.
When the minimum frequency of the multi-path outgoing line is greater than or equal to the rated frequency (namely 50 Hz) of the power grid and the primary frequency modulation configuration mode is a primary frequency modulation response priority mode, the primary frequency modulation is carried out by selecting the measurement frequency which deviates from the rated frequency of the power grid to the maximum as the target frequency, so that the supporting capability of the power station on the power station unit control system during the primary frequency modulation is improved.
Based on the same inventive concept, please refer to fig. 6, the present application further proposes a fourth embodiment, which is based on the first embodiment.
Example IV
Selecting a corresponding target frequency from the frequencies of the multiple outgoing lines according to the primary frequency modulation configuration mode comprises:
s322, if the primary frequency modulation configuration mode is a network power priority mode, determining the frequency which is the smallest from the rated frequency of the power grid in the frequency of the multi-path outgoing line as a target frequency.
Specifically, if the minimum frequency of the multiple outgoing lines is greater than or equal to the rated frequency (i.e. 50 Hz) of the power grid, and the primary frequency modulation configuration mode is the power grid power priority mode, the smaller the frequency measured by the frequency measurement device deviates from the rated frequency (i.e. 50 Hz) of the power grid, the smaller the power drop of the power station, otherwise, the larger the power grid of the power station is, the requirement of power grid power priority is met, and the target frequency=the measurement frequency with the minimum deviation from the rated frequency (i.e. 50 Hz) of the power grid among the frequencies measured by all the frequency measurement devices of the power station should be set. The frequency which deviates from the rated frequency of the power grid to the minimum in the multi-channel sending-out line is used for primary frequency modulation, so that the online electric quantity during the primary frequency modulation is improved.
Based on the same inventive concept, please refer to fig. 7 and 8, the present application further proposes a fifth embodiment, which is based on the first embodiment.
Example five
Referring to fig. 7, selecting a corresponding target frequency from the frequencies of the multiple outgoing lines according to the primary frequency modulation configuration mode includes:
s323, if the primary frequency modulation configuration mode is a primary frequency modulation and internet surfing electric quantity compatible mode, judging whether frequencies in a primary frequency modulation dead zone exist in the frequencies of the multi-channel outgoing lines;
s324, if at least one frequency located in the primary frequency modulation dead zone exists in the frequency of the multi-channel outgoing line, selecting a target frequency corresponding to the primary frequency modulation and internet surfing electric quantity compatible mode.
Specifically, referring to fig. 8, step S324 includes:
and S3241, if at least one frequency located in the primary frequency modulation dead zone exists in the frequencies of the multi-path outgoing lines, excluding the frequency located in the primary frequency modulation dead zone, and selecting the frequency which is the smallest in deviation from the rated frequency of the power grid among the frequencies of the rest multi-path outgoing lines as the target frequency.
If the minimum frequency of the multi-path outgoing line is greater than or equal to the rated frequency (i.e. 50 Hz) of the power grid and is in a mode of combining primary frequency modulation and on-line electric quantity, if the frequency of the multi-path outgoing line has a frequency within a primary frequency modulation dead zone (i.e. the frequency is within 50Hz to 50.05 Hz), in order to respond to primary frequency modulation preferentially, the measuring frequency within the primary frequency modulation dead zone (i.e. the frequency is within 50Hz to 50.05 Hz) needs to be ignored when the target frequency is selected. Meanwhile, in order to give consideration to the increase of the online electric quantity during the primary frequency modulation, the measurement frequency in the dead zone of the primary frequency modulation (namely, within 50Hz to 50.05 Hz) can be removed, and the measurement frequency with the smallest deviation from the rated frequency of the power grid is selected from the remaining measurement frequencies to be used as the target frequency of the primary frequency modulation of the power station. For example, the frequencies of the collected outgoing lines include 50.02Hz (i.e., frequencies within 50Hz to 50.05 Hz), 50.08Hz (i.e., frequencies outside the primary frequency modulation dead zone and at minimum deviations from the rated frequency of the power grid). A primary frequency modulation may be performed with the target frequency selected to be 50.08Hz instead of 50.02 Hz.
If the minimum frequency of the multi-path sending-out line is larger than or equal to the rated frequency (namely 50 Hz) of the power grid and is in a primary frequency modulation and on-line electric quantity compatible mode, selecting the measurement frequency which is the smallest in deviation from the rated frequency of the power grid from the remaining measurement frequencies as the target frequency of the power station to carry out primary frequency modulation by excluding the measurement frequency in a primary frequency modulation dead zone (namely the frequency is within 50Hz to 50.05 Hz), and compatible with preferentially responding the primary frequency modulation and improving the on-line electric quantity of the power station.
And S3242, if the frequencies of the multi-path outgoing lines are all outside the primary frequency modulation dead zone, determining the frequency which is the smallest in deviation from the rated frequency of the power grid in the frequencies of the multi-path outgoing lines as the target frequency.
If the minimum frequency of the multi-path outgoing line is greater than or equal to the rated frequency (i.e. 50 Hz) of the power grid, and the power station is in a mode of combining primary frequency modulation response and internet surfing priority, when all frequencies are outside a primary frequency modulation dead zone (i.e. are greater than 50.05 Hz), the power station needs to respond to primary frequency modulation immediately, at the moment, the measuring frequency which deviates from the rated frequency of the power grid by the minimum is selected as the target frequency, and the amplitude reduction of the target power of the generator can be reduced due to the measuring frequency which deviates from the rated frequency of the power grid by the minimum, so that the internet surfing electric quantity is improved.
If the minimum frequency of the multi-path outgoing line is greater than or equal to the rated frequency (namely 50 Hz) of the power grid and is in a mode of taking primary frequency modulation response and internet surfing priority into consideration, the minimum measurement frequency deviating from the rated frequency of the power grid is selected as the target frequency, and the reduction of the target power of the generator can be reduced due to the minimum measurement frequency deviating from the rated frequency of the power grid, so that the internet surfing electric quantity is improved in the primary frequency modulation interval.
Based on the same inventive concept, please refer to fig. 9, the present application further proposes a sixth embodiment, which is based on the first embodiment.
Example six
Before the step of determining the primary frequency modulation configuration mode in S200, the method further includes:
s500, judging the relation between the difference value of the maximum frequency and the minimum frequency in the frequencies of the multi-path outgoing lines and the preset value;
and if the difference value between the maximum frequency and the minimum frequency in the frequencies of the multi-path outgoing lines is smaller than or equal to the preset value, determining a primary frequency modulation configuration mode.
It should be noted that the preset value may be set according to the nominal frequency measurement accuracy of the frequency measurement device. In one embodiment, when the difference between the maximum frequency of the frequencies of the outgoing lines and the minimum frequency of the frequencies of the outgoing lines is not greater than twice the nominal frequency measurement accuracy, it is indicated that the measurement accuracy of all the frequency measurement devices meets the primary frequency modulation requirement, and the preferred process of performing the frequency according to the primary frequency modulation configuration mode can be entered. The nominal frequency measurement accuracy may be a measurement accuracy specification meeting the requirements of the power grid.
S510, if the difference between the maximum frequency and the minimum frequency in the frequencies of the multiple outgoing lines is larger than the preset value, terminating the primary frequency modulation operation and sending out a fault signal of the frequency measuring device.
It should be noted that, when the difference between the maximum frequency of the frequencies of the multiple outgoing lines and the minimum frequency of the frequencies of the multiple outgoing lines is greater than twice the nominal frequency measurement accuracy, it is indicated that the measurement accuracy of one or more frequency measurement devices does not meet the primary frequency modulation requirement. The power plant should terminate the primary frequency modulation function and send a frequency measurement device fault signal to the unit control system. Specifically, the fault signal of the frequency measurement device can be sent out by displaying through a display device such as a display screen or playing fault information through a loudspeaker. The mode of sending the fault signal of the frequency measuring device is within the protection scope of the application, and the mode of sending the fault signal of the frequency measuring device is not particularly limited.
It should be understood that the above listed preset values of twice the nominal frequency measurement accuracy are only one exemplary embodiment, and that other multiples of the nominal frequency measurement accuracy may be used as the preset value, for example, 3 times the nominal frequency measurement accuracy, etc. The preset value of the present embodiment should not be construed as a specific limitation.
According to the embodiment, the precision of the multi-frequency measuring device is checked according to the relation between the measuring precision of the frequency measuring device and the nominal frequency measuring precision, and the condition that the measuring precision of the frequency measuring device is unqualified can be judged, so that the probability of misoperation or refusal of primary frequency modulation response is reduced.
Referring to fig. 10, a frequency modulation control apparatus is described below, which may include: a processor 1001, such as a CPU, memory 1005, user interface 1003, network interface 1004, communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the configuration of the frequency modulation control apparatus shown in fig. 10 does not constitute a limitation of the frequency modulation control apparatus and may include more or fewer components than shown, or may combine certain components, or may have a different arrangement of components.
As shown in fig. 10, an operating system, a network communication module, a user interface module, and a frequency modulation control program may be included in the memory 1005 as one type of computer storage medium. The operating system is a program for managing and controlling hardware and software resources of the frequency modulation control equipment, and supports the operation of the frequency modulation control program and other software or programs.
In the fm control apparatus shown in fig. 10, the network interface 1004 is mainly used for a background server, and performs data communication with the background server; the processor 1001 may be configured to invoke the fm control program stored in the memory 1005 and perform the steps of the fm control method as described above.
In an embodiment, the processor 1001 may be configured to invoke the fm control program stored in the memory 1005 and execute the method comprising:
acquiring the frequency of the multi-path outgoing lines;
determining a primary frequency modulation configuration mode;
determining a target frequency corresponding to the primary frequency modulation configuration mode from the frequencies of the multi-path outgoing lines according to the primary frequency modulation configuration mode;
and calculating the target power of the power station according to the target frequency, and performing primary frequency modulation according to the target power of the power station.
In some embodiments, the processor 1001 may be configured to invoke the fm control program stored in the memory 1005 and execute the method comprising:
judging the minimum frequency of the frequencies of the multi-path outgoing lines and the rated frequency of the power grid;
and if the minimum frequency is greater than or equal to the rated frequency of the power grid, selecting a corresponding target frequency from the frequencies of the multi-path outgoing lines according to the primary frequency modulation configuration mode.
In some embodiments, the processor 1001 may be configured to invoke the fm control program stored in the memory 1005 and execute the method comprising:
the frequency modulation control method further comprises the following steps: and if the minimum frequency is smaller than the rated frequency of the power grid, determining the minimum frequency as a target frequency.
In some embodiments, the processor 1001 may be configured to invoke the fm control program stored in the memory 1005 and execute the method comprising:
and if the primary frequency modulation configuration mode is a primary frequency modulation response priority mode, determining the maximum frequency in the frequencies of the multiple sending-out lines as a target frequency.
In some embodiments, the processor 1001 may be configured to invoke the fm control program stored in the memory 1005 and execute the method comprising:
and if the primary frequency modulation configuration mode is a network power priority mode, determining the frequency which is the smallest in deviation from the rated frequency of the power grid in the frequency of the multi-path outgoing line as a target frequency.
In some embodiments, the processor 1001 may be configured to invoke the fm control program stored in the memory 1005 and execute the method comprising:
if the primary frequency modulation configuration mode is a primary frequency modulation and internet surfing electric quantity compatible mode, judging whether frequencies in a primary frequency modulation dead zone exist in the frequencies of the multi-channel outgoing lines;
and if at least one frequency which is positioned in the primary frequency modulation dead zone exists in the frequency of the multi-channel outgoing line, selecting a target frequency corresponding to the primary frequency modulation and internet surfing electric quantity compatible mode.
In some embodiments, the processor 1001 may be configured to invoke the fm control program stored in the memory 1005 and execute the method comprising:
and excluding the frequency in the primary frequency modulation dead zone, and selecting the frequency which is the smallest from the rated frequency of the power grid among the frequencies of the rest multipath outgoing lines as the target frequency.
In some embodiments, the processor 1001 may be configured to invoke the fm control program stored in the memory 1005 and execute the method comprising:
and if the frequencies of the multi-path outgoing lines are all outside the primary frequency modulation dead zone, determining the frequency which is the smallest in deviation from the rated frequency of the power grid in the frequencies of the multi-path outgoing lines as the target frequency.
In some embodiments, the processor 1001 may be configured to invoke the fm control program stored in the memory 1005 and execute the method comprising:
judging the relation between the difference value of the maximum frequency and the minimum frequency in the frequencies of the multi-path outgoing lines and a preset value;
and if the difference between the maximum frequency and the minimum frequency in the frequencies of the multiple outgoing lines is smaller than or equal to the preset value, executing the step of determining the primary frequency modulation configuration mode.
In some embodiments, the processor 1001 may be configured to invoke the fm control program stored in the memory 1005 and execute the method comprising:
if the difference between the maximum frequency and the minimum frequency in the frequencies of the multiple outgoing lines is larger than the preset value, terminating the primary frequency modulation operation and sending out a fault signal of the frequency measuring device.
According to the frequency modulation control equipment, the primary frequency modulation configuration modes are determined, the target frequency of the preferred measuring device is selected from the frequencies of the multipath outgoing lines according to the preset rule corresponding to each primary frequency modulation configuration mode to perform primary frequency modulation power control, the defect that primary frequency modulation refuses or the Internet surfing electric quantity is lost when the frequencies of the primary frequency measurement device and other secondary frequency measurement devices are different is overcome, and the primary frequency modulation response reliability is improved.
Referring to fig. 11, the present application further provides a frequency modulation control device, including: an acquisition module 101, a mode determination module 102, a mode selection module 103 and a primary frequency modulation module 104.
The acquisition module 101 is configured to acquire frequencies of multiple outgoing lines;
the mode determining module 102 is configured to determine a primary frequency modulation configuration mode;
the mode selection module 103 is configured to determine a target frequency corresponding to the primary frequency modulation configuration mode from the frequencies of the multiple outgoing lines according to the primary frequency modulation configuration mode;
the primary frequency modulation module 104 is configured to calculate a target power of the power plant according to the target frequency, and perform primary frequency modulation according to the target power of the power plant.
The steps of implementing each functional module of the frequency modulation control device may refer to each embodiment of the frequency modulation control method of the present application, which is not described herein again.
The present application also proposes a computer readable storage medium storing one or more programs executable by one or more processors to implement steps in the frequency modulation control method.
The present invention also proposes a computer program product comprising a computer program which, when executed by a processor, implements the steps of the frequency modulation control method as described above, and examples of the frequency modulation control apparatus, the computer readable storage medium and the computer program product according to the present invention are referred to in each of the embodiments of the frequency modulation control method according to the present invention, and will not be described herein.
It will be appreciated by those skilled in the art that 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 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.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the invention. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (12)
1. A frequency modulation control method, applied to a power plant having multiple outgoing lines, comprising:
acquiring the frequency of the multi-path outgoing lines;
determining a primary frequency modulation configuration mode;
determining a target frequency corresponding to the primary frequency modulation configuration mode from the frequencies of the multi-path outgoing lines according to the primary frequency modulation configuration mode;
calculating the target power of the power station according to the target frequency, and performing primary frequency modulation according to the target power of the power station;
the step of determining a target frequency corresponding to the primary frequency modulation configuration mode from the frequencies of the multiple outgoing lines according to the primary frequency modulation configuration mode includes:
judging the minimum frequency of the frequencies of the multi-path outgoing lines and the rated frequency of the power grid;
if the minimum frequency is greater than or equal to the rated frequency of the power grid, selecting a corresponding target frequency from the frequencies of the multi-path outgoing lines according to the primary frequency modulation configuration mode;
the step of selecting a corresponding target frequency from the frequencies of the multiple outgoing lines according to the primary frequency modulation configuration mode includes:
if the primary frequency modulation configuration mode is a primary frequency modulation and internet surfing electric quantity compatible mode, judging whether frequencies in a primary frequency modulation dead zone exist in the frequencies of the multi-channel outgoing lines or not, and determining corresponding target frequencies according to corresponding judging results.
2. The method of claim 1, wherein after the step of determining the minimum frequency of the frequencies of the multiple outgoing lines and the power grid rated frequency, further comprising:
and if the minimum frequency is smaller than the rated frequency of the power grid, determining the minimum frequency as a target frequency.
3. The method of claim 1, wherein the step of selecting a corresponding target frequency from the frequencies of the multiplexed outgoing lines according to the primary frequency modulation configuration mode comprises:
and if the primary frequency modulation configuration mode is a primary frequency modulation response priority mode, determining the maximum frequency in the frequencies of the multiple sending-out lines as a target frequency.
4. The method of claim 1, wherein the step of selecting a corresponding target frequency from the frequencies of the multiplexed outgoing lines according to the primary frequency modulation configuration mode comprises:
and if the primary frequency modulation configuration mode is a network power priority mode, determining the frequency which is the smallest in deviation from the rated frequency of the power grid in the frequency of the multi-path outgoing line as a target frequency.
5. The method of claim 1, wherein the step of determining the corresponding target frequency according to the corresponding determination result comprises:
and if at least one frequency which is positioned in the primary frequency modulation dead zone exists in the frequency of the multi-channel outgoing line, selecting a target frequency corresponding to the primary frequency modulation and internet surfing electric quantity compatible mode.
6. The method of claim 5, wherein the step of selecting the target frequency corresponding to the primary frequency modulation and internet surfing power compatible mode comprises:
and excluding the frequency in the primary frequency modulation dead zone, selecting the frequency with the smallest deviation from the rated frequency of the power grid from the frequencies of the rest multipath outgoing lines, and determining the frequency as the target frequency.
7. The method of claim 1, wherein the step of determining the corresponding target frequency according to the corresponding determination result comprises:
and if the frequencies of the multi-path outgoing lines are all outside the primary frequency modulation dead zone, determining the frequency which is the smallest in deviation from the rated frequency of the power grid in the frequencies of the multi-path outgoing lines as the target frequency.
8. The method of claim 1, wherein prior to the step of determining the primary frequency modulation configuration mode, further comprising:
judging the relation between the difference value of the maximum frequency and the minimum frequency in the frequencies of the multi-path outgoing lines and a preset value;
and if the difference between the maximum frequency and the minimum frequency in the frequencies of the multiple outgoing lines is smaller than or equal to the preset value, executing the step of determining the primary frequency modulation configuration mode.
9. The method of claim 8, wherein after the step of determining a relationship between a difference between a maximum frequency and a minimum frequency among frequencies of the multiplex outgoing line and the preset value, further comprising:
if the difference between the maximum frequency and the minimum frequency in the frequencies of the multiple outgoing lines is larger than the preset value, terminating the primary frequency modulation operation and sending out a fault signal of the frequency measuring device.
10. A frequency modulation control device, comprising a processor, a memory electrically connected to the processor, and a frequency modulation control program stored on the memory and operable on the processor; the frequency modulation control program when executed by the processor implements the steps of the frequency modulation control method according to any one of claims 1 to 9.
11. A computer-readable storage medium storing one or more programs executable by one or more processors to implement the steps in the frequency modulation control method of any one of claims 1 to 9.
12. A computer program product comprising a computer program which, when executed by a processor, implements the steps of the frequency modulation control method according to any one of claims 1-9.
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