CN110336247B - Method for protecting transformer, capacity controller and protection system - Google Patents
Method for protecting transformer, capacity controller and protection system Download PDFInfo
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- CN110336247B CN110336247B CN201910748762.2A CN201910748762A CN110336247B CN 110336247 B CN110336247 B CN 110336247B CN 201910748762 A CN201910748762 A CN 201910748762A CN 110336247 B CN110336247 B CN 110336247B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
Abstract
The application discloses a method for protecting a transformer, a capacity controller and a protection system. The method is applied to the capacity controller installed on the transformer, and specifically comprises the following steps: presetting a rated current value and a preset overrun recovery value for each phase of alternating current in a capacity controller; detecting real-time total current of each phase of alternating current at fixed time; when the real-time total current of a certain phase of alternating current is detected to exceed the rated current value of the phase of alternating current, transmitting a power consumption allocation indication to a quantitative counter; and transmitting an indication for recovering the rated current of the quantitative device to the quantitative device when the real-time total current of each phase of alternating current is detected to be lower than the preset overrun recovery value within the preset time after the indication for allocating the power consumption is transmitted to the quantitative device. The problem that the transformer is extremely easy to damage due to the fact that current protection does not exist between the existing transformer and the batcher is solved, and the stability of a power distribution system is higher.
Description
Technical Field
The present application relates to the field of power load control technologies, and in particular, to a method, a capacity controller, and a protection system for protecting a transformer.
Background
In a power distribution system, a transformer is used as a core device to change the magnitude of an alternating voltage and to supply a proper voltage to a power distribution circuit. In order to ensure that the transformer is in a safe working state, the normal load of the transformer is far lower than the rated load of the transformer, so that the load utilization rate of the transformer is low, and when the load of the transformer in normal operation exceeds the rated load of the transformer, the transformer is greatly lost, and the stability of a power distribution system is also poor.
In the existing power distribution system, when the total current of the electric products used by a user side is too large, the instantaneous current fed back to the transformer is also rapidly increased, and the transformer is rapidly impacted. Based on this, the present application arose in order to protect transformers in a power distribution system.
Disclosure of Invention
The application provides a method for protecting a transformer, which is applied to a capacity controller installed on the transformer, and the method comprises the following steps:
presetting a rated current value and a preset overrun recovery value for each phase of alternating current in a capacity controller;
detecting real-time total current of each phase of alternating current at fixed time;
when the real-time total current of a certain phase of alternating current is detected to exceed the rated current value of the phase of alternating current, transmitting a power consumption allocation indication to a quantitative counter;
and transmitting an indication for recovering the rated current of the quantitative device to the quantitative device when the real-time total current of each phase of alternating current is detected to be lower than the preset overrun recovery value within the preset time after the indication for allocating the power consumption is transmitted to the quantitative device.
The method for protecting a transformer, wherein the transmitting the indication of the allocated power consumption to the quantitative measure specifically includes:
the capacity controller determines a deployment strategy according to the detected real-time total current, and directly sends the deployment strategy to the batcher through a communication line;
or the capacity controller sends the allocation power consumption indication carrying the real-time total current to the background server, the background server determines the allocation strategy according to the real-time total current, and the allocation strategy is issued to the batcher.
The method for protecting a transformer as described above, wherein the issuing of the deployment policy to the quantitative device specifically includes the following substeps:
inquiring the quantifier which meets the interrupt condition;
generating a deployment strategy according to the actual use condition of the quantifier, and sending an adjustment instruction comprising the deployment strategy to the quantifier meeting the interruption condition;
and after receiving the dispatching completion response of the batcher, updating the dispatched batcher priority.
The method for protecting a transformer as described above, wherein the deployment strategy comprises interrupting all end devices, interrupting a portion of end devices, or reducing power to a portion of end devices;
when a deployment strategy for interrupting all the terminal equipment is adopted, sending an instruction of interrupting all the terminal equipment to a batcher with the highest priority level;
when a deployment strategy of the terminal equipment of the interrupt part is adopted, calculating the current magnitude to be regulated according to the current detection value reported by the capacity controller, carrying the current magnitude to be regulated in the regulation instruction, and sending part of the regulation instruction to the batcher with the highest priority level according to a preset rule;
and when a scheduling strategy for reducing the power of part of the terminal equipment is adopted, sending a part of equipment power reduction indication to the batcher with the highest priority level according to a preset rule.
The present application further provides a capacitance controller for protecting a transformer, comprising: the intelligent control system comprises a current detection module, an intelligent control module and a communication module;
the current detection module is used for detecting the real-time total current of each phase of alternating current at regular time and sending a detection result to the intelligent control module;
the intelligent control module is used for informing the communication module to issue a power consumption allocation instruction to the batcher when the received real-time total current of the alternating current of a certain phase detected by the current detection module exceeds the rated current value of the alternating current;
and the power distribution controller is used for informing the communication module to send an indication for recovering rated current of the batcher to the batcher when the real-time total current of each phase of alternating current is detected to be lower than the preset overrun recovery value within the preset time after the communication module is informed to send the indication for allocating power consumption to the batcher;
and the communication module is used for issuing the indication of the allocated power consumption to the batcher and issuing the indication of the recovered rated current of the batcher to the batcher.
The capacitor controller for protecting the transformer is characterized in that the intelligent control module is configured to determine an adjustment strategy according to the real-time total current, and notify the communication module to issue an indication of allocated power consumption including the adjustment strategy to the quantity quantifying device.
The capacitor controller for protecting the transformer as described above, wherein the communication module issues the allocation policy to the batcher, and is specifically configured to query the batcher meeting the interruption condition, generate the allocation policy according to an actual usage situation of the batcher, send an adjustment instruction including the allocation policy to the batcher meeting the interruption condition, and update the allocated batcher priority after receiving an allocation completion response of the batcher.
The application also provides a protection system for protecting the transformer, which comprises a volume controller and a batcher, wherein the volume controller is arranged on the transformer and is connected with the batcher through a communication line;
the batcher is used for controlling the on-off of the electric equipment according to the allocation strategy issued by the capacity controller; and restoring the coil of the quantitative device to the normal rated current according to an instruction of restoring the rated current of the quantitative device, which is issued by the capacity controller.
The application also provides a protection system for protecting the transformer, which comprises a capacity controller arranged on the transformer, a background server and a quantifier, wherein the capacity controller and the quantifier are in remote communication connection with the background server;
the background server is used for receiving a power consumption allocation indication carrying real-time total current sent by the capacity controller, determining an allocation strategy according to the real-time total current and sending the allocation strategy to the batcher;
receiving an indication of recovering the rated current of the batcher sent by the capacity controller, and sending the indication to the batcher;
the batcher is used for controlling the on-off of the electric equipment according to the allocation strategy issued by the background server; and restoring the coil of the batcher to the normal rated current according to an instruction of restoring the rated current of the batcher, which is issued by the background server.
The protection system for protecting the transformer, as described above, wherein, in the backend server, the allocation policy is determined according to the real-time total current, and is specifically configured to query the batcher meeting the interrupt condition, generate the allocation policy according to the actual usage of the batcher, send an adjustment instruction including the allocation policy to the batcher meeting the interrupt condition, and update the allocated batcher priority after receiving an allocation completion response of the batcher.
The beneficial effect that this application realized is as follows: by adopting the method for protecting the transformer, the capacitor controller and the protection system, the problem that the transformer is extremely easy to damage due to the fact that no current protection exists between the existing transformer and the batcher is solved, and the stability of a power distribution system is stronger.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a flowchart of a transformer protection method according to an embodiment of the present application;
FIG. 2 is a flow diagram of a method of generating a deployment strategy;
fig. 3 is a flowchart of a method of a transformer protection system according to a second embodiment of the present application;
fig. 4 is a flowchart of a method of a transformer protection system according to a third embodiment of the present application;
fig. 5 is a schematic diagram of a content controller in a transformer protection system according to a fourth embodiment of the present application;
fig. 6 is a schematic diagram of a transformer protection system according to a fifth embodiment of the present application;
fig. 7 is a schematic diagram of a transformer protection system according to a sixth embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to reduce the impact of instantaneous strong current to the transformer and guarantee the safety of the transformer, the application provides a transformer protection system, which comprises the transformer, a capacity controller and a batcher.
Generally, the number of transformers, capacity controllers and quantifiers in a certain distribution area (such as a certain cell) is set to be 1:1: n, namely, one transformer is installed in one distribution area, one capacity controller is installed on one transformer, and one capacity controller maintains a plurality of quantifiers in the distribution area; optionally, the number of transformers, capacity controllers and quantifiers in the distribution area can be adjusted at any time according to the coverage area of the distribution area and the operation load of each device.
Specifically, the capacitive controller is installed at a transformer end in a power distribution area and used for detecting the current of the transformer, the capacitive controller is divided into three phases (three-phase alternating current is a transmission form of electric energy, is called three-phase current for short, and is a power supply consisting of three alternating current potentials which have the same frequency, the same amplitude and the same phase difference of 120 degrees in sequence), and each phase of the power supply records the rated current and the real-time current of the power supply. The batcher is installed at the user side and is used for counting the total load of all the electric equipment of the user side and adjusting the electricity consumption of the user side.
In order to solve the problems that a laid communication line is easy to damage and the maintenance cost is high due to the fact that the communication line between the capacity controller and the quantitative device is connected, the transformer protection system further comprises a background server, only electric connection is needed between the capacity controller and the quantitative device, communication connection is not needed, and the capacity controller issues an adjusting command to the quantitative device through the background server.
In addition, the number of the background servers can be adjusted at any time according to the coverage area of the power distribution area and the operation load of each device, for example, a plurality of proxy servers can be arranged in the power distribution area with a large range to perform power distribution control on each fragmentation area, and then the total background server manages and maintains each proxy server.
Example one
An embodiment of the present application provides a transformer protection method, which is applied to a capacity controller, and as shown in fig. 1, specifically includes the following steps:
step 110, presetting a rated current value and a preset overrun recovery value for each phase of alternating current in a capacity controller;
preferably, in the three-phase power of the capacitance controller, a corresponding rated current value is set for each phase of alternating current; in addition, in order to ensure the safety of the transformer, the method also comprises the steps of presetting a maximum current value for each phase of alternating current of the capacity controller, wherein the maximum current value is 10% smaller than the maximum value of the transformer; setting a maximum current value as a, a rated current value as m, a preset detection interval as 1 hour and a preset overrun recovery value as L; the preset detection interval can be set according to actual needs, and is not limited herein.
Step 120, regularly detecting the real-time total current of each phase of alternating current of the capacitance controller according to a preset detection interval, and transmitting a power allocation and consumption indication to the quantitative counter when the real-time total current of a certain phase of alternating current exceeds the rated current value of the alternating current;
specifically, when a timer in the volume controller reaches a preset detection interval, detecting the real-time total current of each alternating current coil in the volume controller, and when the current value a > c > m of the real-time total current is detected, indicating that the total power consumption of the current user-side electric equipment exceeds a set rated current value, transmitting a power consumption allocation indication to the quantitative counter, and informing the quantitative counter to perform interruption adjustment on the user-side electric equipment;
when a communication line is arranged between the capacity controller and the quantitative device, the capacity controller can directly transmit a power consumption allocation indication to the quantitative device, and a specific allocation strategy is carried in the power consumption allocation indication; or in order to reduce the processing load of the batcher, the indication of the electricity consumption for allocation is firstly sent to a background server, then the background server determines the allocation strategy, the allocation strategy is sent to the batcher, and the corresponding interruption adjustment is carried out on the user equipment;
preferably, in the embodiment of the application, a communication line is not laid between the capacity controller and the batcher, the capacity controller directly sends the indication of the power consumption for allocation to the background server, the background server generates an allocation strategy after receiving the request, the allocation strategy is issued to the batcher, and the batcher performs corresponding interrupt adjustment on the user equipment according to the allocation strategy; by adopting the scheme, the problems of manual maintenance and easiness in damage caused by laying of a communication line between the capacity controller and the quantifier can be reduced.
Step 130, when the real-time total current of each phase of alternating current is detected to be lower than the preset overrun recovery value in a preset time after the indication of the allocated electricity consumption is transmitted to the quantitative counter, transmitting an indication of recovering the rated current of the quantitative counter to the quantitative counter;
specifically, the capacitance controller continuously detects the real-time total current of each phase of alternating current at regular time; if the real-time total current of the alternating current of a certain phase is detected to be still between the rated current value and the maximum current value, continuously transmitting a power consumption allocation indication to the quantitative counter; and if the current values of the transformer are detected to be lower than the rated current value within a certain time period, transmitting an indication for recovering the rated current of the quantitative device to the quantitative device.
In the embodiment of the application, preferably, when it is detected that the current value exceeds the rated current value, the detection interval is reset, the time for detecting the current value is shortened, for example, 5 minutes, if the current value detected again is still higher than the rated current value, the background server sends a request for adjusting the power consumption of the quantitative device, and continues to interrupt the user-side power consumption equipment, and if the detected current value has the rated current value, the adjusted power consumption of the user equipment meets the power consumption standard, and the transformer cannot be affected safely;
optionally, the method may further include readjusting the detection interval to a preset detection interval after sending the power consumption qualified response to the background server, so as to reduce frequent communication between the volume controller and the background server.
In the embodiment of the application, the overrun recovery of the current of the quantitative device is initiated by the capacitor, the capacitor detects the current in real time and sends an adjustment command, for example, the rated current of a certain alternating current of the capacitor is 50A, when the real-time current reaches 51A, the adjustment command is transmitted to the quantitative device, the current of the quantitative device is adjusted down by 20% according to a rule, and at the moment, the real-time current of the capacitor is programmed to 48A, so that the stable operation of a transformer is met;
further, when the current value detected by the capacity controller in real time within the continuous time (such as 20 minutes) does not rebound to exceed the preset overrun recovery value 45A all the time, the situation that the large-current power utilization is stopped is indicated, and the capacity controller transmits an overrun recovery command to the quantitative counter to recover the coil of the quantitative counter to the normal rated current.
Fig. 2 is a schematic flow chart of transmitting an indication of allocated power consumption to a fixed quantity device based on step 120 in fig. 1 according to an embodiment of the present application, where, as shown in fig. 2, the transmitting of the indication of allocated power consumption to the fixed quantity device includes the following sub-steps:
it should be noted that, if no communication line is laid between the volume controller and the quantitative device, the following method is executed by the background server, and if a communication line is laid between the volume controller and the quantitative device, the above scheme may be executed by the volume controller end, or may be executed by the background server end, preferably, the processing pressure of the volume controller is reduced, and is executed by the background server;
specifically, a batcher priority level list updated regularly is maintained in a capacity controller or a background server, and a batcher with the highest priority level is searched from the priority level list;
for example, as shown in the batcher priority list in table 1 below, a residential building has 6 floors and 3 units, each unit has 2 households, and the higher the number is, the higher the priority is, the batchers participating in the allocation are 21-36:
| 16 | 15 | 14 | 13 | 12 | 11 |
| 17 | 30 | 29 | 28 | 27 | 10 |
| 18 | 31 | 36 | 35 | 26 | 9 |
| 19 | 32 | 33 | 34 | 25 | 8 |
| 20 | 21 | 22 | 23 | 24 | 7 |
| 1 | 2 | 3 | 4 | 5 | 6 |
TABLE 1
As can be seen from the above table, the intermediate household 36 has the highest priority, and optionally, a plurality of batchs may be selected according to the detected current value of the transformer, for example, the batchs with priorities of 36 and 35 are selected, after the blending is completed, the priorities of the two batchs are set to be 1 and 2, and then the priorities of the other batchs are all added by 2, as shown in the batcher priority list in table 2 below:
| 18 | 17 | 16 | 15 | 14 | 13 |
| 19 | 32 | 31 | 30 | 29 | 12 |
| 20 | 33 | 1 | 2 | 28 | 11 |
| 21 | 34 | 35 | 36 | 27 | 10 |
| 22 | 23 | 24 | 25 | 26 | 9 |
| 3 | 4 | 5 | 6 | 7 | 8 |
TABLE 2
And if the total current after the blending does not reach the standard, the batchers of 34 and 33 are continuously interrupted, and the like is repeated.
the scheduling strategy specifically comprises the steps of interrupting all terminal equipment, interrupting part of the terminal equipment, reducing the power of part of the terminal equipment and the like; when a deployment strategy for interrupting all the terminal equipment is adopted, sending an instruction of interrupting all the terminal equipment to a batcher with the highest priority level; when a deployment strategy of the terminal equipment of the interrupt part is adopted, calculating the current magnitude to be regulated according to the current detection value reported by the capacity controller, carrying the current magnitude to be regulated in the regulation instruction, and sending part of the regulation instruction to the batcher with the highest priority level according to a preset rule; when a scheduling strategy for reducing the power of part of terminal equipment is adopted, sending a power reduction instruction of part of equipment to the batcher with the highest priority according to a preset rule (for example, the preset rule is to equally distribute the current quantity to be reduced to a plurality of batchers with the highest priority, or to distribute the corresponding current quantity to be reduced to a plurality of batchers with the highest priority according to user feedback, etc.);
for example, when the capacity controller reports an overrun, the capacity controller queries N users whose priority is 1 of a certain building managed under the capacity controller according to the priority, and issues current adjustment commands to the coils of the quantitative device one by one, and the rated current of all the coils whose priority is 1 in the building is adjusted by 20%.
It should be noted that, what kind of allocation strategy is specifically selected is set according to the actual situation of the power distribution area, and may be adjusted according to the actual usage situation of the real-time changing quantifier, for example, the allocation strategy of all the interrupted end devices is selected when the rated power is greatly exceeded, or the allocation strategy of not turning off but reducing the power of part of the end devices is selected when the current temperature of the power distribution area is too low, and the specific situation is not limited.
in the embodiment of the application, after the power consumption of the batchmeter in the round is allocated, the priority of the batchmeter which is allocated in the batchmeter priority level list is updated to be the lowest, and if the current value of the transformer reported by the capacity controller is still higher than the rated current value, the power consumption of the batchmeter needs to be allocated again.
Furthermore, a batcher end is matched with a dispatching strategy, a priority setting function is added in a batcher user management interface, and a manager sets the priority of coil current regulation of each household, the rated current of the coil, the current and the like; and recording a historical deployment log in the quantifier, wherein the historical deployment log comprises the percentage of the current coil current which is adjusted downwards, the last adjustment time and the like for later reference.
In addition, in the indoor connected with the batcher end, the terminal equipment deployment priority can be set by the household, for example, corresponding priorities are set on five terminal equipment in the indoor respectively, the batcher performs corresponding deployment according to the terminal equipment priority, for example, the priority is set from 1 to 5, 1 represents the highest priority, 5 represents the lowest priority, and the current is adjusted from the beginning with the priority of 1;
for example, as shown in the following table, the priorities of the indoor end devices are set as follows:
TABLE 3
Example two
Fig. 3 is a flowchart of a specific method of a transformer protection system according to an embodiment of the present disclosure (the transformer protection system shown in fig. 3 is composed of a capacity controller and a batcher communicatively connected thereto). As shown in fig. 3, the method comprises:
301, detecting real-time total current of each phase of alternating current at regular time by a capacity controller;
step 302, when the capacitance controller detects that the real-time total current of a certain phase of alternating current exceeds a rated current value, transmitting a power consumption allocation indication to a quantitative counter; the allocation power consumption indication carries an allocation strategy generated by a capacity controller;
step 303, after the batcher receives the indication of the allocated electricity consumption, the rated current of the batcher is adjusted according to the allocation strategy in the indication of the allocated electricity consumption;
step 304, after sending the indication of the electricity consumption for allocation, the capacity controller continues to detect the real-time total current of each phase of alternating current at regular time, and when detecting that the real-time total current of a certain phase of alternating current still exceeds the rated current value, continues to execute step 302; when the real-time total current of each phase of alternating current detected in the preset time is lower than the preset overrun recovery value, executing step 305;
specifically, a preset overrun recovery value may be set in the capacity controller, the value is lower than the rated current value, and may be set according to actual needs, for example, if the rated current is 50A, the preset overrun recovery value may be set to 45A, and if the real-time current detected by the capacity controller in the preset time for each phase of alternating current is always lower than the preset overrun recovery value, it indicates that the large-current power consumption has stopped, the rated current of the recoverable batcher is the normal rated current value.
Step 305, the capacity controller transmits an overrun recovery command for recovering rated current of the quantitative device to the quantitative device;
and step 306, after the quantitative device receives the overrun recovery command, recovering the coil of the quantitative device to the normal rated current.
EXAMPLE III
Fig. 4 is a flowchart of a specific method of the transformer protection system according to an embodiment of the present disclosure (the transformer protection system shown in fig. 4 is composed of a volume controller, a background server, and a quantifier). As shown in fig. 4, the method includes:
step 401, detecting real-time total current of each phase of alternating current at regular time by a capacitance controller;
step 402, when the capacity controller detects that the real-time total current of a certain phase of alternating current exceeds a rated current value, transmitting a power consumption allocation indication to a background server; the allocation power consumption indication carries the detected real-time total current;
step 403, the background server generates a dispatching strategy according to the received real-time total current in the electricity consumption dispatching indication, and sends the regulating strategy to the batcher meeting the interruption condition;
step 404, after receiving the adjustment strategy, the batcher adjusts the rated current of the batcher according to the allocation strategy in the adjustment instruction, and returns an allocation completion response to the background server;
step 405, the background server updates the deployed batcher priority after receiving the deployment completion response;
step 406, after sending the electricity consumption allocation indication, the capacity controller continues to detect the real-time total current of each phase of alternating current at regular time, and when detecting that the real-time total current of a certain phase of alternating current still exceeds the rated current value, continues to execute step 402; when the real-time total current of each phase of alternating current detected in the preset time is lower than a preset overrun recovery value, executing the step 405;
405, the capacity controller transmits an overrun recovery command for recovering the rated current of the batcher to the background server;
step 406, after receiving the overrun recovery command, the background server sends an overrun recovery instruction for recovering rated current of the batcher to the batcher;
and step 407, after receiving the overrun recovery instruction, the quantitative device restores the coil of the quantitative device to the normal rated current and returns a recovery success response to the background server.
Example four
Fig. 5 is a specific schematic diagram of a content controller in a transformer protection system according to an embodiment of the present application. As shown in fig. 5, the volume controller includes: a first smart control module 510, a first current detection module 520, and a first communication module 530; the first intelligent control module 510 is a main control chip in the volume controller, is respectively connected with the first current detection module 520 and the first communication module 530, and is used for controlling and coordinating the cooperative communication of each module in the volume controller;
the first current detection module 520 is used for detecting the real-time total current of each phase of alternating current at regular time and sending a detection result to the intelligent control module;
the first intelligent control module 510 is configured to notify the first communication module 530 to issue a power consumption allocation instruction to the batcher when the received real-time total current of the ac power of a certain phase detected by the current detection module 520 exceeds a rated current value of the ac power;
and is used for notifying the first communication module 530 to issue an indication of restoring the rated current of the batcher to the batcher when the real-time total current of each phase of alternating current is detected to be lower than the preset overrun restoring value within the preset time after the first communication module 530 is notified to issue the indication of allocating the power consumption to the batcher;
the first communication module 530 is configured to issue an indication of allocating power consumption to the batcher, and issue an indication of recovering rated current of the batcher to the batcher.
In the embodiment of the application, further, the intelligent control module is configured to determine an adjustment strategy according to the real-time total current, and notify the communication module to issue an instruction of allocation power consumption including the adjustment strategy to a batcher.
In the embodiment of the present application, further, the communication module issues the allocation policy to the batcher, where the allocation policy is specifically used to query the batcher meeting the interruption condition, generates the allocation policy according to the actual use condition of the batcher, sends an adjustment instruction including the allocation policy to the batcher meeting the interruption condition, and updates the allocated batcher priority after receiving an allocation completion response of the batcher.
In this embodiment of the application, the capacity controller further includes a first time module 540, configured to provide time for detecting a real-time total current of each phase of alternating current for the first intelligent control module 510, and record preset time for the first intelligent control module 510 after notifying the first communication module 530 to issue an indication of allocated power consumption to the batcher.
In the embodiment of the present application, further, a first input module 550 connected to the intelligent control module and used for inputting parameters of the volume controller and a first display module 560 used for displaying a current state of the volume controller are further disposed in the volume controller.
EXAMPLE five
Fig. 6 is a specific schematic diagram of a transformer protection system according to an embodiment of the present application. As shown in fig. 6, the protection system includes the volume controller shown in fig. 5, and further includes a quantitative device, and the volume controller is connected with the quantitative device through a communication line;
the batcher is used for controlling the on-off of the electric equipment according to the allocation strategy issued by the capacity controller; and restoring the coil of the quantitative device to the normal rated current according to an instruction of restoring the rated current of the quantitative device, which is issued by the capacity controller.
Specifically, the batcher includes a second intelligent control module 610, a second current detection module 620, a second time module 630, and a second communication module 640;
the second intelligent control module 610 is a main control chip in the batcher, and is respectively connected with the second current detection module 620, the second time module 630 and the second communication module 640, and is used for controlling and coordinating cooperative communication of each module in the batcher; the second current detection module 620 is configured to detect a total current of all the electric devices at the user end, and report the detected total current of the electric devices to the second intelligent control module 610, and the second intelligent control module 610 transmits the total current of the electric devices to the transformer through a wire; the second intelligent control module 610 sends an execution signal to the electric equipment control terminal according to the received instruction to control the on-off of the electric equipment; the second time module 630 has a clock function, and is configured to provide time guarantee for displaying the timer;
further, a second input module 650 and a second display module 660 connected with the second intelligent control module 610 are also arranged in the batcher; the second input module 650 may receive input setting information according to user requirements, including but not limited to adjusting date and time, and setting a maximum current value of each power consumption device; the second display module 660 may display the setting information of the user and the current state of the timer.
EXAMPLE six
Fig. 7 is a specific schematic diagram of a transformer protection system according to an embodiment of the present application. As shown in fig. 7, the protection system includes the volume controller shown in fig. 5, further includes a quantifier and a background server, and the volume controller and the quantifier are connected with the background server in a remote communication manner;
the background server is used for receiving a power consumption allocation indication carrying real-time total current sent by the capacity controller, determining an allocation strategy according to the real-time total current and sending the allocation strategy to the batcher;
receiving an indication of recovering the rated current of the batcher sent by the capacity controller, and sending the indication to the batcher;
the batcher is used for controlling the on-off of the electric equipment according to the allocation strategy issued by the background server; and restoring the coil of the batcher to the normal rated current according to an instruction of restoring the rated current of the batcher, which is issued by the background server.
In the embodiment of the present application, further, in the background server, a scheduling policy is determined according to the real-time total current, and is specifically configured to query the batchers meeting the interruption condition, generate a scheduling policy according to actual use conditions of the batchers, send an adjustment instruction including the scheduling policy to the batchers meeting the interruption condition, and update the priorities of the scheduled batchers after receiving a scheduling completion response of the batchers.
While the 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. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (6)
1. A method for protecting a transformer, applied to a capacitor mounted on the transformer, the method comprising:
presetting a rated current value and a preset overrun recovery value for each phase of alternating current in a capacity controller;
detecting real-time total current of each phase of alternating current at fixed time;
when the real-time total current of a certain phase of alternating current is detected to exceed the rated current value of the phase of alternating current, transmitting a power consumption allocation indication to a quantitative counter;
when the real-time total current of each phase of alternating current is detected to be lower than the preset overrun recovery value in a preset time after the power consumption allocation indication is transmitted to the quantitative counter, an indication of recovering the rated current of the quantitative counter is transmitted to the quantitative counter;
the capacity controller is arranged at the transformer end in the power distribution area and used for detecting the current of the transformer; the batcher is arranged at the user side and is used for counting the total load of all electric equipment of the user side and adjusting the electricity consumption of the user side;
a communication line is not laid between the capacity controller and the batcher, the capacity controller directly sends a power consumption allocation indication to the background server, the background server generates a power allocation strategy after receiving the power consumption allocation indication, the power allocation strategy is issued to the batcher, and the batcher performs corresponding interruption adjustment on the power consumption equipment according to the power allocation strategy;
issuing the allocation strategy to the batcher, which specifically comprises the following substeps: inquiring the quantifier which meets the interrupt condition; generating a deployment strategy according to the actual use condition of the quantifier, and sending an adjustment instruction comprising the deployment strategy to the quantifier meeting the interruption condition; updating the allocated batchmeter priority after receiving the allocation completion response of the batchmeter;
in the indoor connected with the batcher end, a resident sets a dispatching priority for each terminal device in the indoor, the batcher carries out corresponding dispatching according to the priority of the terminal devices, and the dispatching strategy comprises the steps of interrupting all the terminal devices, interrupting part of the terminal devices or reducing the power of part of the terminal devices; when a deployment strategy for interrupting all the terminal equipment is adopted, sending an instruction of interrupting all the terminal equipment to a batcher with the highest priority level; when a deployment strategy of the terminal equipment of the interrupt part is adopted, calculating the current magnitude to be regulated according to the current detection value reported by the capacity controller, carrying the current magnitude to be regulated in the regulation instruction, and sending part of the regulation instruction to the batcher with the highest priority level according to a preset rule; when a scheduling strategy for reducing the power of part of terminal equipment is adopted, sending a power reduction instruction of part of equipment to a batcher with the highest priority level according to a preset rule;
the preset rule is that the plurality of batchers with the highest priority level are averagely distributed with the current amount required to be reduced, or the plurality of batchers with the highest priority level are distributed with the corresponding current amount required to be reduced according to user feedback.
2. The method according to claim 1, wherein transmitting the indication of the allocated power usage to the meter comprises:
the capacity controller sends the allocation power consumption indication carrying the real-time total current to the background server, the background server determines an allocation strategy according to the real-time total current, and the allocation strategy is issued to the batcher.
3. A capacitance controller for protecting a transformer, comprising: the intelligent control system comprises a current detection module, an intelligent control module and a communication module;
the current detection module is used for detecting the real-time total current of each phase of alternating current at regular time and sending a detection result to the intelligent control module;
the intelligent control module is used for informing the communication module to issue a power consumption allocation instruction to the batcher when the received real-time total current of the alternating current of a certain phase detected by the current detection module exceeds the rated current value of the alternating current;
and the power distribution controller is used for informing the communication module to send an indication for recovering rated current of the batcher to the batcher when the real-time total current of each phase of alternating current is detected to be lower than a preset overrun recovery value within a preset time after the communication module is informed to send the indication for allocating power consumption to the batcher;
the communication module is used for issuing an indication of allocating power consumption to the batcher and issuing an indication of recovering rated current of the batcher to the batcher;
the capacity controller is arranged at the transformer end in the power distribution area and used for detecting the current of the transformer; the batcher is arranged at the user side and is used for counting the total load of all electric equipment of the user side and adjusting the electricity consumption of the user side;
a communication line is not laid between the capacity controller and the batcher, the capacity controller directly sends a power consumption allocation indication to the background server, the background server generates a power allocation strategy after receiving the power consumption allocation indication, the power allocation strategy is issued to the batcher, and the batcher performs corresponding interruption adjustment on the power consumption equipment according to the power allocation strategy;
the communication module sends the allocation strategy to the quantifier to be used for inquiring the quantifier meeting the interruption condition, generates the allocation strategy according to the actual use condition of the quantifier, sends an adjustment instruction comprising the allocation strategy to the quantifier meeting the interruption condition, and updates the allocated quantifier priority after receiving the allocation completion response of the quantifier;
in the indoor connected with the batcher end, a resident sets a dispatching priority for each terminal device in the indoor, the batcher carries out corresponding dispatching according to the priority of the terminal devices, and the dispatching strategy comprises the steps of interrupting all the terminal devices, interrupting part of the terminal devices or reducing the power of part of the terminal devices; when a deployment strategy for interrupting all the terminal equipment is adopted, sending an instruction of interrupting all the terminal equipment to a batcher with the highest priority level; when a deployment strategy of the terminal equipment of the interrupt part is adopted, calculating the current magnitude to be regulated according to the current detection value reported by the capacity controller, carrying the current magnitude to be regulated in the regulation instruction, and sending part of the regulation instruction to the batcher with the highest priority level according to a preset rule; when a scheduling strategy for reducing the power of part of terminal equipment is adopted, sending a power reduction instruction of part of equipment to a batcher with the highest priority level according to a preset rule;
the preset rule is that the plurality of batchers with the highest priority level are averagely distributed with the current amount required to be reduced, or the plurality of batchers with the highest priority level are distributed with the corresponding current amount required to be reduced according to user feedback.
4. The volume controller for protecting transformer of claim 3, wherein the intelligent control module is configured to determine an adjustment policy according to the real-time total current, and inform the communication module to issue an indication of allocated power consumption including the adjustment policy to a meter.
5. A protection system for protecting a transformer, comprising the capacity controller of any one of claims 3 to 4 mounted on the transformer, characterized by further comprising a background server and a quantifier, wherein the capacity controller and the quantifier are in remote communication connection with the background server;
the background server is used for receiving a power consumption allocation indication carrying real-time total current sent by the capacity controller, determining an allocation strategy according to the real-time total current and sending the allocation strategy to the batcher;
receiving an indication of recovering the rated current of the batcher sent by the capacity controller, and sending the indication to the batcher;
the batcher is used for controlling the on-off of the electric equipment according to the allocation strategy issued by the background server; and restoring the coil of the batcher to the normal rated current according to an instruction of restoring the rated current of the batcher, which is issued by the background server.
6. The protection system according to claim 5, wherein the backend server determines a scheduling policy according to the real-time total current, specifically queries the batcher meeting the interruption condition, generates a scheduling policy according to an actual usage of the batcher, sends an adjustment instruction including the scheduling policy to the batcher meeting the interruption condition, and updates the scheduled priority of the batcher after receiving a scheduling completion response from the batcher.
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| CN201910748762.2A CN110336247B (en) | 2019-08-14 | 2019-08-14 | Method for protecting transformer, capacity controller and protection system |
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