A method and device for calculating the off-grid power, a storage medium, and a computer device

Abstract

The present invention provides a method and device for calculating the off-grid power, a storage medium, and a computer device. The method includes obtaining meter reading data read by a dispatching electric energy acquisition system from a meter installed on a line at preset time intervals; the meter reading data being the forward power; calculating the off-grid power generated under various line operation states based on the meter reading data; and calculating the total off-grid power generated under various line operation states within a preset settlement period to obtain the total off-grid power generated in the preset settlement period. The present invention realizes fair and just metering of the off-grid power and strictly prevents power loss in electricity charges.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power, and in particular to a method and device for calculating the off-grid power consumption, a storage medium, and a computer device. Background Art

[0002] The off-grid power consumption refers to the power obtained from the power grid, that is, the consumed power. Whether the metering scheme for the on-grid and off-grid power consumption is reasonable directly affects the interests of both power generation and power supply enterprises. Currently, the power metering point for the power generation plant's on-grid gateway is generally set at the property right demarcation point between the two parties, that is, the outgoing line side of the power generation plant. There are two ways to set the off-grid gateway metering point. One is to use the reverse metering function of the power metering device at the on-grid gateway power metering point to measure the off-grid gateway power consumption. The other is to set it at the high-voltage side of the start-up and standby transformer of the power generation plant. However, due to the price difference between the on-grid and off-grid electricity prices, the electricity cannot be offset against each other. Moreover, since the wiring of the power generation plant is very complex, generally there are multiple outgoing lines. There are situations of self-generation and self-use under the power generation and on-grid operation state, and there are also problems such as cross power between lines. Therefore, using the common off-grid power consumption metering method, the gateway metering device cannot distinguish the cross electricity and the off-grid electricity, resulting in the inability to accurately measure the off-grid electricity and the problem of inaccurate, fair and reasonable metering of power trading settlement. Summary of the Invention

[0003] In view of the above problems, the present invention provides a method and device for calculating the off-grid power consumption, a storage medium, and a computer device. By measuring the meter reading data when all the generating units in the plant are powered off at preset time intervals, and calculating the off-grid power consumption in various line operation states based on the meter reading data, and then summarizing the total off-grid power consumption in all line operation states within a preset settlement period to obtain the total off-grid power consumption generated in the preset settlement period, the fair and just metering of the off-grid power consumption is realized, and the loss of electricity charges is strictly prevented.

[0004] According to a first aspect of the present invention, there is provided a method for calculating off-grid power consumption, including:

[0005] Obtaining meter reading data read by a dispatching electric energy acquisition system for a meter installed on a line at preset time intervals; the meter reading data is forward power;

[0006] Calculating the off-grid power consumption generated in various line operation states according to the meter reading data;

[0007] Calculating the total off-grid power consumption generated in the various line operation states within a preset settlement period to obtain the total off-grid power consumption generated in the preset settlement period.

[0008] Optionally, the setting method of the meter is as follows:

[0009] Set a power generation grid connection metering point for each group of generating units; the power generation grid connection metering point includes at least one grid-connected power metering meter; the meter reading data of the grid-connected power metering meter is positive power.

[0010] Set at least one off-grid power metering meter for each startup and standby transformer at the off-grid metering point, and the metering method is high supply and high metering; the off-grid metering point includes at least one off-grid power metering meter; the meter reading data of the off-grid power metering meter is positive power.

[0011] Optionally, the meter reading data obtained by the acquisition dispatching electric energy acquisition system for the metering meters set on the line at a preset time interval includes:

[0012] At each preset time interval j from the dispatching electric energy acquisition system, read the grid-connected power metering meters corresponding to n groups of generating units and the off-grid power metering meters corresponding to m startup and standby transformers set on the line once, obtain the meter reading data X1 to Xn, Y1 to Ym and save them;

[0013] Among them, the X1 to Xn are respectively the meter reading data of the grid-connected power metering meters corresponding to n groups of generating units; the Y1 to Ym are the meter reading data of the off-grid power metering meters corresponding to m startup and standby transformers.

[0014] Optionally, calculating the off-grid power generated under various line operation states based on the meter reading data includes:

[0015] Obtain the line operation state; the line operation state includes a parallel operation state and a split operation state;

[0016] Judge whether off-grid power is generated under the line operation state according to the meter reading data;

[0017] If off-grid power is generated, calculate the off-grid power within the preset time interval under the line operation state.

[0018] Optionally, judging whether off-grid power is generated under the line operation state according to the meter reading data includes:

[0019] If the line operation state is a parallel operation state, when the difference in the meter reading data of all the grid-connected power metering meters corresponding to the generating units is equal to 0 and the difference in the meter reading data of the off-grid power metering meter corresponding to any one startup and standby transformer is greater than 0, off-grid power is generated under the parallel operation state;

[0020] If the line operating state is the split operation state, and the reading data of the on-grid electricity meters corresponding to all the generating units on the split line shows that the positive electricity difference is equal to 0, and the reading data of the off-grid electricity meters corresponding to all the start-up and standby transformers on the split line shows that the positive electricity difference is greater than 0, then off-grid electricity is generated in the split operation state;

[0021] Wherein, the positive electricity difference is the difference between the reading data after the preset time interval and the reading data before the preset time interval.

[0022] Optionally, calculating the off-grid electricity within a preset time interval in the line operating state includes:

[0023] If the line operating state is the parallel operation state, according to the positive electricity difference of the off-grid electricity meter corresponding to the start-up and standby transformer within the preset time interval, multiplying by the measurement multiplier, the off-grid electricity W1 corresponding to each start-up and standby transformer is obtained. Then the off-grid electricity generated within the preset time interval in the parallel operation state is Wherein, m is the number of start-up and standby transformers set on the line;

[0024] If the line operating state is the split operation state, then respectively according to the positive electricity differences of all the start-up and standby transformers set on the two split lines within the preset time interval, multiplying by the measurement multiplier, the off-grid electricity W2 corresponding to the start-up and standby transformers set on the first split line and the off-grid electricity W3 corresponding to the start-up and standby transformers set on the second split line are obtained. Then the off-grid electricity generated within the preset time interval in the split operation state is Or Wherein, l and k are respectively the numbers of start-up and standby transformers set on the first split line and the second split line, and l + k = m; S2 and S3 are respectively the off-grid electricity generated by the first split line within the preset time interval and the off-grid electricity generated by the second split line within the preset time interval.

[0025] Optionally, calculating the total off-grid electricity generated in the multiple line operating states within a preset settlement period includes:

[0026] Calculating the total off-grid electricity generated within the preset settlement period according to all the preset time intervals and the corresponding line operating states included in the preset settlement period. The calculation formula is:

[0027]

[0028] Wherein, H1 - H3 are respectively the numbers of preset time intervals included in the parallel line state and the two types of split operation states within the preset settlement period; S_total is the total off-grid electricity generated by the line within the preset settlement period.

[0029] According to the second aspect of the present invention, a down-network power calculation device is provided, including:

[0030] A data acquisition module, configured to acquire meter reading data obtained by the dispatching electric energy acquisition system reading a meter set on a line at a preset time interval; the meter reading data is forward power.

[0031] A power calculation module, configured to calculate the down-network power generated under various line operation states according to the meter reading data.

[0032] A power summary module, configured to calculate the sum of the down-network power generated under various line operation states within a preset settlement period to obtain the total down-network power corresponding to the preset settlement period.

[0033] According to the third aspect of the present invention, a computer-readable storage medium is proposed, on which a computer program is stored. The computer program, when executed by a processor, implements the steps of the down-network power calculation method as described in any one of the first aspects of the present invention.

[0034] According to the fourth aspect of the present invention, a computer device is proposed, including a memory, a processor, and a computer program stored on the memory and executable on the processor. The computer program, when executed by the processor, implements the steps of the down-network power calculation method as described in any one of the first aspects of the present invention.

[0035] A down-network power calculation method, device, storage medium, and computer device provided by the present invention obtain meter reading data obtained by the dispatching electric energy acquisition system reading a meter set on a line at a preset time interval, calculate the down-network power generated under various line operation states according to the meter reading data, calculate the sum of the down-network power generated under various line operation states within a preset settlement period to obtain the total down-network power generated in the preset settlement period, use the dispatching electric energy acquisition system to obtain relevant data, solve the problem of being unable to measure the down-network power, reflect metering fairness and justice, strictly prevent electricity bill losses, do not require special purchase of metering voltage transformers and metering current transformers, and significantly reduce production operation and maintenance costs.

[0036] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the present invention more obvious and understandable, the following specific embodiments of the present invention are specifically given.

[0037] Those skilled in the art will understand the above and other purposes, advantages, and features of the present invention more clearly according to the following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered as a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0039] Figure 1 A flowchart showing the method for calculating the power consumption for off-grid in one embodiment of the present invention is shown;

[0040] Figure 2 A structural diagram showing the main connection circuit diagram in one embodiment of the present invention is shown;

[0041] Figure 3 A structural diagram showing the device for calculating the power consumption for off-grid in one embodiment of the present invention is shown;

[0042] Figure 4 A structural diagram showing the device for calculating the power consumption for off-grid in another embodiment of the present invention is shown;

[0043] Figure 5 A schematic diagram of the physical structure of a computer device provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0045] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "comprising..." do not exclude the presence of additional identical elements in the process, method, article or device comprising the said elements.

[0046] An embodiment of the present invention provides a method for calculating the power consumption for off-grid, asFigure 1 As shown in the figure, the method may at least include the following steps S101 to S103:

[0047] Step S101: Obtain the meter reading data obtained by the dispatching electric energy acquisition system for reading the meter installed on the line at a preset time interval.

[0048] In an embodiment of the present invention, taking the typical wiring method used in a large power plant as an example, a scheme for correctly measuring the off-grid power is proposed. A brief schematic diagram of the main connection line diagram of this power plant is as Figure 2 shown, which is a double-bus sectionalized wiring. There are 4 sets of generator sets and 3 startup standby transformers installed on the entire line. Among them, generator sets 201, 202 and startup standby transformer 205 are installed on the first sectionalized line, and generator sets 203, 204 and startup standby transformers 206, 207 are installed on the second sectionalized line. It can be understood that by controlling the circuit breaker switches installed on the line, the transformers on the entire line can operate in parallel or in split operation.

[0049] In actual operation, due to the large number of outgoing lines and very complex wiring in this power plant, there is cross power with multiple power source points, and there is a situation of self-use of generated electricity during the power generation and grid-connected operation state. The metering point settings cannot distinguish between off-grid and self-use of generated electricity, and cannot meet the off-grid metering requirements. Therefore, up / down grid metering points can be set at specific positions on the line to achieve correct measurement of the off-grid power.

[0050] In an embodiment of the present invention, the meter setting method on the line is as follows: For each generator set, a power generation and grid-connected gateway metering point is set. The power generation and grid-connected gateway metering point includes at least one on-grid power metering meter, and the meter reading data of the on-grid power metering meter is positive power; for each startup standby transformer, a down-grid gateway metering point is set with at least one down-grid power metering meter. The metering method is high-voltage supply and high-voltage metering. The grid gateway metering point includes at least one down-grid power metering meter, and the meter reading data of the down-grid power metering meter is positive power. Taking the above power plant as an example, the specific setting method is as follows:

[0051] Table 1 (Setting Table for Up / Down Grid Metering Points)

[0052] Serial number Metering point Category Power direction 1 Generator set 201 Power generation and grid connection gateway Positive direction 2 Generator set 202 Power generation and grid connection gateway Positive direction 3 Generator set 203 Power generation and grid connection gateway Positive direction 4 Generator set 204 Power generation and grid connection gateway Positive direction 5 Startup and standby transformer 205 Grid connection gateway Positive direction 6 Startup and standby transformer 206 Grid connection gateway Positive direction 7 Startup and standby transformer 207 Grid connection gateway Positive direction

[0053] Specifically, the power measurement points set at the up and down network gateways can be configured with power consumption information collection terminals, installed at the metering panel for remote monitoring and power consumption data collection, or can be connected to the dispatching power energy collection system with meter reading function for power consumption data collection, storage and metering. For the convenience of calculating the down-network power consumption in the embodiments of the present invention, the wiring mode of the down-network gateway metering point can also be set according to actual needs, and current transformers and voltage transformers can be configured. Taking a certain large power plant mentioned above as an example, there is a 220 kV bus voltage. Three down-network gateway metering points are respectively set on the 220 kV sides of three start-up and standby transformers 205, 206, and 207. The metering method is high supply and high metering, the wiring mode is three-phase four-wire, and the metering point voltage is 220 kV; 3 current transformers are configured at each down-network gateway metering point, and the metering ratio of each is 600 A / 5 A, and the accuracy class is 0.2S; 3 voltage transformers are configured, with a ratio of 220 kV / 0.1 kV and an accuracy class of 0.2; 2 three-phase four-wire intelligent energy meters are configured, with specifications of 3×1.5(6) A, 3×57.7 / 100 V, and an accuracy class of 0.2S.

[0054] Before calculating the down-network power consumption, it is necessary to first use the function of the dispatching power energy collection system to read the meter once at a short time interval to collect the meter reading data of each up and down network gateway metering point. The specific process is as follows: At each preset time interval j from the dispatching power energy collection system, read the meter once for the up-network power consumption meters corresponding to n groups of generator sets set on the line and the down-network power consumption meters corresponding to m start-up and standby transformers, and obtain and save the meter reading data X1 to Xn, Y1 to Ym; where X1 to Xn are the meter reading data of the up-network power consumption meters corresponding to n generators; Y1 to Ym are the meter reading data of the down-network power consumption meters corresponding to m start-up and standby transformers.

[0055] Taking the above power plant as an example, the meter reading time interval can be set to 15 minutes, that is, read the up-network power consumption meters corresponding to 4 groups of generator sets and the down-network power consumption meters corresponding to 3 start-up and standby transformers once every 15 minutes. That is, every 15 minutes, a new set of meter reading data X1 to X4, Y1 to Y3 is generated, and the meter reading data generated for all preset time intervals is recorded and saved.

[0056] Step S102, calculate the down-network power consumption generated under various line operation states according to the meter reading data.

[0057] The off-grid power refers to the power obtained from the power grid, i.e., the consumed power. When the entire power plant is shut down for maintenance and the generator sets are restarted, the power grid power is used. At this time, the power flow direction is from the bus to the startup and standby transformer, and the power measured by the watt-hour meter on the high-voltage side of the startup and standby transformer is the off-grid power. When one set of generator sets is generating electricity and another generator set is restarted after a power outage, the startup and standby transformer is used. However, the power used at this time is provided by the generator sets through the bus and the startup and standby transformer, rather than by the power grid. That is, the power measured by the watt-hour meter on the high-voltage side of the startup and standby transformer at this time is not the off-grid power, and this power is mixed with the real off-grid power. That is to say, when all the generator sets in the whole plant are out of power, the power measured by the watt-hour meter on the high-voltage side of the startup and standby transformer is the real off-grid gateway power. In the embodiment of the present invention, the line operating state can be parallel operation or split operation. For different line operating states, the method of generating off-grid power is also different, and it is necessary to judge whether off-grid power is generated according to different line operating states.

[0058] Specifically, the line operating state can be obtained first. The line operating state can be obtained through the dispatching electric energy acquisition system, or can be obtained through other means. The present invention does not limit this. The line operating state includes a parallel operation state and a split operation state. When the line operating state is parallel operation, the lines jointly supply power to the load; when the line operating state is split operation, the sectional lines supply power to their respective loads respectively without intersection. Therefore, according to the meter reading data, judging whether off-grid power is generated in the line operating state, the specific process is as follows:

[0059] A: If the line operating state is the parallel operation state, and the reading data of all the on-grid power meters corresponding to the generator sets is such that the positive power difference is equal to 0, and the reading data of the off-grid power meter corresponding to any one startup and standby transformer is such that the positive power difference is greater than 0, then off-grid power is generated in the parallel operation state. The positive power difference is the difference between the reading data after a preset time interval and the reading data before the preset time interval.

[0060] That is to say, when the line operating state is parallel operation, all the generator sets on the line are stopped, and the positive power difference of any one or more startup and standby transformers is greater than 0, that is, the positive power of any one or more startup and standby transformers increases after the preset time interval compared with before the preset time interval, indicating that off-grid power is generated in the preset time interval. Taking the above power plant as an example, the specific judgment method is as follows in the table:

[0061] Table 2 (Judgment data table for generating off-grid power in parallel operation state)

[0062]

[0063] According to the analysis of the above table, when the line operation state is parallel operation, within a 15-minute calculation period, if the forward power difference of the grid-connected gateway metering corresponding to generator sets 201-204 is 0 at the same time, and the forward power difference of any one of the downlink gateway metering points corresponding to standby transformers 205-207 is greater than 0, downlink power is generated.

[0064] Furthermore, calculate the downlink power within a preset time interval in the parallel operation state, specifically including:

[0065] Multiply the forward power difference of the downlink power metering table corresponding to the standby transformer within the preset time interval by the metering ratio to obtain the downlink power W1 corresponding to each standby transformer. Then, the downlink power generated within the preset time interval in the parallel operation state is where m is the number of standby transformers set on the line.

[0066] The metering ratio refers to the product of the transformation ratios of the current transformer and voltage transformer configured for the metering watt-hour meter. Taking the above power plant as an example, the voltage transformer transformation ratio is 220 kV / 0.1 kV = 2200, and the current transformer transformation ratio is 300 / 5 = 60. The metering ratio is 2200 * 60. In the embodiments of the present invention, by multiplying the forward power difference of the metering table by the metering ratio, the power value can be obtained.

[0067] In the parallel operation state, the downlink power generated within the preset time interval is the sum of the downlink powers corresponding to all standby transformers. Taking the above power plant as an example, the downlink power S1 generated by the line within the preset time interval in the parallel operation state is S1 = W 205 + W 206 + W 207 ; where W 205 、W 206 and W 207 are the downlink powers generated by standby transformers 205-207 within the preset time interval, respectively.

[0068] B: If the line operation state is split operation state, and the reading data of the grid-connected power metering tables corresponding to all generators on the split line shows that the forward power difference is 0, and the reading data of the downlink power metering tables corresponding to all standby transformers on the split line shows that the forward power difference is greater than 0, then downlink power is generated in the split operation state.

[0069] That is to say, when the line is in the split operation state, if all the generating units on a certain section of the line are shut down, and the positive power difference of any one or more startup and standby transformers on this section of the line is greater than 0, that is, the positive power of any one or more startup and standby transformers increases after a preset time interval compared with that before the preset time interval, it indicates that the line has generated power flowing out of the grid within the preset time interval. Taking the above-mentioned power plant as an example, the specific judgment method is as shown in Table 3 and Table 4 below:

[0070] Table 3 (Data table for judging power flowing out of the grid generated by the split line in the first column)

[0071]

[0072] Table 4 (Data table for judging power flowing out of the grid generated by the split line in the second column)

[0073]

[0074] According to the analysis of the above table, when the line is in the split operation state, within a 15-minute calculation period, if the positive power differences of the grid connection metering corresponding to generating units 201 - 202 are both 0, and the positive power difference of the grid connection metering point corresponding to startup and standby transformer 205 is greater than 0, power flowing out of the grid is generated; or within a 15-minute calculation period, if the positive power differences of the grid connection metering corresponding to generating units 203 - 204 are both 0, and the positive power difference of the grid connection metering point corresponding to any one of startup and standby transformers 206 - 207 is greater than 0, power flowing out of the grid is generated.

[0075] Furthermore, calculating the power flowing out of the grid within the preset time interval in the split operation state specifically includes:

[0076] Respectively multiplying the positive power differences of all the startup and standby transformers set on the two split lines within the preset time interval by the metering multiplier to obtain the power flowing out of the grid W2 corresponding to the startup and standby transformers set on the first split line and the power flowing out of the grid W3 corresponding to the startup and standby transformers set on the second split line. Then the power flowing out of the grid generated within the preset time interval in the split operation state is or where l and k are the numbers of startup and standby transformers set on the first split line and the second split line respectively, and l + k = m; S2 and S3 are the power flowing out of the grid generated by the first split line and the second split line within the preset time interval respectively.

[0077] That is to say, in the split operation state, the power flowing out of the grid generated within the preset time interval is the sum of the power flowing out of the grid corresponding to all the startup and standby transformers set on the split line. Taking the above-mentioned power plant as an example, the power flowing out of the grid S2 generated by the first split line within the preset time interval = W 205, the off-grid power S3 generated by the second column splitting line within the preset time interval is S3 = W 206 +W 207 ; where W 205 , W 206 and W 207 are respectively the off-grid powers generated by the start-up standby transformers 205 - 207 on the splitting line within the preset time interval.

[0078] Step S103, calculate the total off-grid power generated under various line operation states within the preset settlement period to obtain the total off-grid power generated in the preset settlement period.

[0079] Specifically, the total off-grid power generated within the preset settlement period can be calculated based on all the preset time intervals and the corresponding line operation states included in the preset settlement period. The calculation formula is:

[0080]

[0081] where H1 - H3 are respectively the quantities of the preset time intervals included in the parallel line state and the two types of splitting operation states within the preset settlement period; S_total is the total off-grid power generated by the line within the preset settlement period.

[0082] That is to say, within the preset settlement period, there may be off-grid powers generated under various line operation states. By obtaining the corresponding quantities of the preset time intervals for different line operation states and the off-grid powers generated in different quantities of the preset time intervals, and performing a summary, the total off-grid power generated by the line within the preset settlement period can be obtained.

[0083] A method and device for calculating off-grid power, a storage medium, and a computer device provided by an embodiment of the present invention, by obtaining the meter reading data read by the dispatching electric energy acquisition system for the watt-hour meters set on the line at preset time intervals, calculating the off-grid powers generated under various line operation states, calculating the total off-grid power generated under various line operation states within the preset settlement period to obtain the total off-grid power generated in the preset settlement period, using the dispatching electric energy acquisition system to obtain relevant data, solve the problem of being unable to measure the off-grid power, reflect the fairness and justice of metering, strictly prevent electricity charge losses, do not require special purchase of metering voltage transformers and metering current transformers, and significantly reduce the production and operation and maintenance costs.

[0084] Furthermore, as a Figure 1 specific implementation, an embodiment of the present invention provides an off-grid power calculation device, as shown in Figure 3 . The device may include: a data acquisition module 310, a power calculation module 320, and a power summary module 330.

[0085] The data acquisition module 310 can be used to acquire the meter reading data obtained by the dispatching electric energy acquisition system for reading the meters set on the line at a preset time interval; the meter reading data is the forward power consumption.

[0086] The power consumption calculation module 320 can be used to calculate the off-grid power consumption generated under various line operation states according to the meter reading data.

[0087] The power consumption summary module 330 can be used to calculate the total off-grid power consumption generated under various line operation states within a preset settlement period, and obtain the total off-grid power consumption corresponding to the preset settlement period.

[0088] Optionally, as Figure 4 shown, a kind of off-grid power consumption calculation device provided by an embodiment of the present invention may further include: a metering setting module 340.

[0089] The metering setting module 340 can be used to set a power generation and grid connection gateway metering point for each group of generator sets; the power generation and grid connection gateway metering point includes at least one grid connection power consumption meter; the meter reading data of the grid connection power consumption meter is the forward power consumption; for each start-up and standby transformer, set at least one off-grid gateway metering point, and the metering method is high supply and high metering; the off-grid gateway metering point includes at least one off-grid power consumption meter; the meter reading data of the off-grid power consumption meter is the forward power consumption.

[0090] The data acquisition module 310 can also be used to read the grid connection power consumption meters corresponding to n groups of generator sets and the off-grid power consumption meters corresponding to m start-up and standby transformers set on the line once every preset time interval j from the dispatching electric energy acquisition system, acquire the meter reading data X1 to Xn, Y1 to Ym and save them; where X1 to Xn are the meter reading data of the grid connection power consumption meters corresponding to n groups of generator sets respectively; Y1 to Ym are the meter reading data of the off-grid power consumption meters corresponding to m start-up and standby transformers.

[0091] The power consumption calculation module 320 can also be used to acquire the line operation state; the line operation state includes a parallel operation state and a separated operation state; judge whether off-grid power consumption is generated under the line operation state according to the meter reading data; if off-grid power consumption is generated, calculate the off-grid power consumption within the preset time interval under the line operation state.

[0092] The power calculation module 320 can also be used to determine that when the line operation state is the parallel operation state, if the reading data of all the grid-connected power meters corresponding to the generator sets shows that the positive power difference is equal to 0, and the reading data of the power meters corresponding to any one start-up and standby transformer shows that the positive power difference is greater than 0, then there is a power consumption from the grid in the parallel operation state; when the line operation state is the split operation state, if the reading data of all the grid-connected power meters corresponding to the generator sets on the split lines shows that the positive power difference is equal to 0, and the reading data of the power meters corresponding to all the start-up and standby transformers on the split lines shows that the positive power difference is greater than 0, then there is a power consumption from the grid in the split operation state; where the positive power difference is the difference between the reading data after a preset time interval and the reading data before the preset time interval.

[0093] The power calculation module 320 can also be used to, when the line operation state is the parallel operation state, multiply the positive power difference of the power meter corresponding to the start-up and standby transformer within a preset time interval by the measurement multiplier to obtain the power consumption from the grid W1 corresponding to each start-up and standby transformer. Then, the power consumption from the grid generated within the preset time interval in the parallel operation state is where m is the number of start-up and standby transformers set on the line; when the line operation state is the split operation state, multiply the positive power differences of all the start-up and standby transformers set on the two split lines within a preset time interval by the measurement multiplier respectively to obtain the power consumption from the grid W2 corresponding to the start-up and standby transformers set on the first split line and the power consumption from the grid W3 corresponding to the start-up and standby transformers set on the second split line. Then, the power consumption from the grid generated within the preset time interval in the split operation state is Or where l and k are the numbers of start-up and standby transformers set on the first split line and the second split line respectively, and l + k = m; S2 and S3 are the power consumption from the grid generated by the first split line and the second split line within the preset time interval respectively.

[0094] The power summary module 330 can also be used to calculate the total power consumption from the grid generated within a preset settlement period based on all the preset time intervals and the corresponding line operation states included in the preset settlement period. The calculation formula is:

[0095]

[0096] where H1 - H3 are the numbers of preset time intervals included in the parallel line state and the two types of split operation states within the preset settlement period respectively; S_total is the total power consumption from the grid generated by the line within the preset settlement period.

[0097] It should be noted that for other corresponding descriptions of each functional module involved in the power consumption from the grid calculation device provided in the embodiment of the present invention, reference can be made to Figure 1The corresponding description of the method shown is not elaborated here.

[0098] Based on the above as Figure 1 shown in the method, correspondingly, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the off-grid power calculation method described in any of the above embodiments are implemented.

[0099] Based on the above as Figure 1 shown in the method and as Figure 4 shown in the embodiment of the device, an embodiment of the present invention further provides a physical structure diagram of a computer device, as Figure 5 shown. The computer device may include a communication bus, a processor, a memory, and a communication interface, and may further include an input / output interface and a display device. Among them, each functional unit can complete mutual communication through the bus. The memory stores a computer program, and the processor is used to execute the program stored on the memory and execute the steps of the off-grid power calculation method described in the above embodiments.

[0100] Those skilled in the art can clearly understand that the specific working processes of the above-described systems, devices, modules, and units can refer to the corresponding processes in the foregoing method embodiments. For the sake of brevity, they are not elaborated here.

[0101] In addition, each functional unit in various embodiments of the present invention may be physically independent, or two or more functional units may be integrated together, or all functional units may be integrated in one processing unit. The above integrated functional units can be implemented in the form of hardware, or in the form of software or firmware.

[0102] Those of ordinary skill in the art can understand that if the integrated functional unit is implemented in the form of software and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, which includes several instructions for causing a computing device (such as a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in various embodiments of the present invention when running the instructions. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc that can store program codes.

[0103] Alternatively, all or part of the steps of implementing the foregoing method embodiments can be completed by hardware related to program instructions (such as computing devices such as personal computers, servers, or network devices), and the program instructions can be stored in a computer-readable storage medium. When the program instructions are executed by the processor of the computing device, the computing device executes all or part of the steps of the methods described in the embodiments of the present invention.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that within the spirit and principles of the present invention, the technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced. These modifications or replacements do not cause the corresponding technical solutions to deviate from the protection scope of the present invention.

Claims

1. A method for calculating the power consumption of the grid, characterized in that, Including: Obtaining the meter reading data read by the dispatching electric energy acquisition system for the meters set on the line at a preset time interval; The meter reading data is the forward power consumption; Calculating the off-grid power generated under various line operation states according to the meter reading data; Calculating the total sum of the off-grid power generated under various line operation states within a preset settlement period to obtain the total off-grid power generated in the preset settlement period; The calculating the off-grid power generated under various line operation states according to the meter reading data includes: Obtaining the line operation state; the line operation state includes a parallel operation state and a split operation state; Judging whether off-grid power is generated under the line operation state according to the meter reading data; If off-grid power is generated, calculating the off-grid power within a preset time interval under the line operation state; The judging whether off-grid power is generated under the line operation state according to the meter reading data includes: If the line operation state is a parallel operation state, and the difference between the meter reading data of all the on-grid power meters corresponding to the generating units is equal to 0 and the difference between the meter reading data of the off-grid power meter corresponding to any one startup and standby transformer is greater than 0, then off-grid power is generated under the parallel operation state; If the line operation state is a split operation state, and the difference between the meter reading data of all the on-grid power meters corresponding to the generating units on the line in the split operation state is equal to 0 and the difference between the meter reading data of all the off-grid power meters corresponding to the startup and standby transformers on the line in the split operation state is greater than 0, then off-grid power is generated under the split operation state; Wherein, the forward power difference is the difference between the meter reading data after the preset time interval and the meter reading data before the preset time interval.

2. The method according to claim 1, characterized in that, The setting method of the meters is as follows: Setting a power generation on-grid gateway metering point for each group of generating units; the power generation on-grid gateway metering point includes at least one on-grid power meter; the meter reading data of the on-grid power meter is the forward power consumption; Setting at least one off-grid power meter for each startup and standby transformer at the off-grid gateway metering point, and the metering method is high supply and high metering; The off-grid gateway metering point includes at least one off-grid power meter; the meter reading data of the off-grid power meter is the forward power consumption.

3. The method according to claim 1, wherein The obtaining the meter reading data read by the dispatching electric energy acquisition system for the meters set on the line at a preset time interval includes: At each preset time interval j in the dispatching electric energy acquisition system, reading the on-grid power meters corresponding to n groups of generating units and the off-grid power meters corresponding to m startup and standby transformers set on the line once, obtaining the meter reading data X1 to Xn, Y1 to Ym and saving them; Wherein, X1 to Xn are respectively the meter reading data of the on-grid power meters corresponding to n groups of generating units; Y1 to Ym are the meter reading data of the off-grid power meters corresponding to m startup and standby transformers.

4. The method according to claim 1, wherein The calculating the off-grid power within a preset time interval under the line operation state includes: If the line operating state is a parallel operation state, multiply the positive power difference of the off-grid power meter corresponding to the start-up and standby transformer within the preset time interval by the metering multiplier to obtain the off-grid power W1 corresponding to each start-up and standby transformer. Then, the off-grid power generated within the preset time interval in the parallel operation state is S1 where m is the number of start-up and standby transformers installed on the line; If the line operating state is the split operation state, then respectively multiply the positive power difference of all the start-up and standby transformers set on the two split lines within the preset time interval by the metering multiplier to obtain the off-grid power W2 corresponding to the start-up and standby transformers set on the first split line and the off-grid power W3 corresponding to the start-up and standby transformers set on the second split line. Then, the off-grid power generated within the preset time interval in the split operation state is or ; where l and k are the numbers of start-up and standby transformers set on the first split line and the second split line respectively, and l + k = m; are respectively the off-grid power generated by the first split line within the preset time interval and the off-grid power generated by the second split line within the preset time interval.

5. The method according to claim 4, wherein The calculating the total sum of the off-grid power generated under various line operation states within a preset settlement period includes: Calculate the total sum of the off-grid power generated within the preset settlement period based on all the preset time intervals included in the preset settlement period and the corresponding line operation states. The calculation formula is as follows: ； Where, H1 - H3 are respectively the quantities of the preset time intervals included in the parallel line state and the two types of split operation states; S_total is the total sum of the off-grid power generated by the line within the preset settlement period.

6. A device for calculating the power output from the grid, characterized in that, It includes: A data acquisition module, configured to acquire the meter reading data obtained by the dispatching electric energy acquisition system for reading the meters installed on the line at preset time intervals; The meter reading data is the forward power; A power calculation module, configured to calculate the off-grid power generated under various line operation states based on the meter reading data; A power summary module, configured to calculate the total sum of the off-grid power generated under the various line operation states within the preset settlement period to obtain the total off-grid power corresponding to the preset settlement period; The power calculation module is further configured to acquire the line operation state; The line operation state includes a parallel operation state and a split operation state; Judge whether off-grid power is generated under the line operation state according to the meter reading data; if off-grid power is generated, calculate the off-grid power within the preset time interval under the line operation state; The power calculation module is further configured that when the line operation state is a parallel operation state, if the difference between the forward power meter reading data of all the on-grid power meters corresponding to the generator sets is equal to 0 and the difference between the forward power meter reading data of the off-grid power meter corresponding to any one startup and standby transformer is greater than 0, then off-grid power is generated under the parallel operation state; when the line operation state is a split operation state, if the difference between the forward power meter reading data of all the on-grid power meters corresponding to the generator sets on the split operation state line is equal to 0 and the difference between the forward power meter reading data of all the off-grid power meters corresponding to the startup and standby transformers on the split operation state line is greater than 0, then off-grid power is generated under the split operation state; where, the forward power difference is the difference between the meter reading data after the preset time interval and the meter reading data before the preset time interval.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the off-grid power calculation method described in any one of claims 1 to 5.

8. A computer device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the off-grid power calculation method described in any one of claims 1 to 5.

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