CN108183491B - Intelligent control device, method and system for user transformer - Google Patents
Intelligent control device, method and system for user transformer Download PDFInfo
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- CN108183491B CN108183491B CN201711295214.6A CN201711295214A CN108183491B CN 108183491 B CN108183491 B CN 108183491B CN 201711295214 A CN201711295214 A CN 201711295214A CN 108183491 B CN108183491 B CN 108183491B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
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- H02J13/0017—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
Abstract
The invention provides a user transformer intelligent control device, method and system, wherein the device comprises: the system comprises a special transformer terminal, a three-phase electric energy meter, a circuit breaker, a residual current action protector, a reactive compensation controller and a protection terminal; the special transformer terminal is connected with the three-phase electric energy meter and used for reading the data of the electric energy meter in real time; the residual current operated protector is used for automatically cutting off the power supply when the leakage current exceeds a preset safety range; the reactive compensation controller is used for automatically switching the compensation equipment; the protection terminal is used for realizing three-section timing limit overcurrent protection and zero-sequence current protection; the circuit breaker is used for realizing switching-on and switching-off operation. The intelligent control device, the method and the system for the user transformer can realize accurate load control, quick-break protection, grounding protection and the like for the user transformer, improve the control function and improve the safety of the transformer in the use process.
Description
Technical Field
The invention belongs to the technical field of power grid control, and particularly relates to an intelligent control device, method and system for a user transformer.
Background
The special transformer terminal is equipment for collecting the electricity utilization information of a special transformer user, can realize the collection of electric energy meter data, the monitoring of the working condition of electric energy metering equipment and the quality of power supply and electric energy, the monitoring of customer electricity utilization load and electric energy, and manages and bidirectionally transmits the collected data.
At present, the control process of a national network special transformer terminal is rough, accurate load control, quick-break protection, grounding protection and the like of a user transformer are difficult to realize, the control function is not perfect, and the potential safety hazard of the transformer in the use process is large.
Disclosure of Invention
The invention aims to provide an intelligent control device, method and system for a user transformer, and aims to solve the technical problem that in the prior art, the user transformer has high potential safety hazard in the use process.
In order to achieve the above object, an embodiment of the present invention provides an intelligent control device for a user transformer, including: the system comprises a special transformer terminal, a three-phase electric energy meter, a circuit breaker, a residual current action protector, a reactive compensation controller and a protection terminal;
the three-phase electric energy meter is used for generating electric energy meter data, and the electric energy meter data comprises at least one of the following items: current voltage, current, power factor, grid frequency, maximum demand, electricity;
the special transformer terminal is connected with the three-phase electric energy meter and used for reading data of the electric energy meter in real time and forming real-time data, curve data, daily freezing data, monthly freezing data and event recording to be read by the master station or actively reported to the master station according to the data of the electric energy meter;
the residual current operated protector is used for automatically cutting off a power supply when the leakage current exceeds a preset safety range, so that grounding protection is realized;
the reactive compensation controller is used for collecting line voltage and current and automatically switching the compensation equipment according to a switching principle;
the protection terminal is used for realizing three-section timing limit overcurrent protection and zero-sequence current protection;
the circuit breaker is used for matching with remote control, charge control, load control, quick-break protection and grounding protection to realize switching-on and switching-off operation.
Further, the residual current operated protector is also used for recording trip event data, and the trip event data comprises at least one of the following items: fault reason, fault phase, trip occurrence time, residual current value before trip, voltage before trip and current before trip;
and the special transformer terminal is also used for reading the trip event data recorded by the residual current operated protector in real time, storing and reporting the trip event data to the master station.
Furthermore, the protection terminal is also used for realizing independent setting of a current fixed value and a time fixed value, setting control words respectively and controlling switching on and off of protection; and when the line current is greater than the protection fixed value, starting a corresponding timer, controlling the breaker to execute a switching-off operation if the duration time reaches the setting time, and stopping the timer if the current returns within the setting time limit.
Further, the protection terminal is further configured to generate fault log data, where the fault log data includes at least one of: fault type, fault phase, fault current and fault occurrence time;
and the special transformer terminal is also used for reading the fault record data of the protection terminal in real time, storing and reporting the fault record data to the main station.
Further, the reactive compensation controller automatically controls the switching of the capacitor bank according to a target power factor, a switching threshold, a power factor cut-off threshold and switching delay;
and the special transformer terminal is also used for reading the switching state of the reactive compensation controller in real time, recording the state when the state is monitored, and reporting the state to the main station.
Furthermore, the special transformer terminal is also used for collecting secondary current and apparent power through the alternating current sampling module, judging whether overload or overcurrent occurs according to configured limit value parameters, popping up a menu to display an alarm when the overload or overcurrent occurs, and sending a notice to a user through a short message or a message;
the protection terminal is also used for acquiring the position of the circuit breaker in real time, and the special transformer terminal acquires the opening and closing position of the circuit breaker by reading input switching value data of the protection terminal.
Further, the user transformer intelligent control device further comprises: a voltage transformer and a current transformer;
the voltage transformer is used for realizing the conversion from primary high voltage to secondary low voltage for the use of a protection and measurement instrument;
the current transformer is used for realizing the conversion from primary large current to secondary small current and is used for protecting and measuring instruments.
Further, the special transformer terminal communicates with the main station through a Q/GDW1376.1-2013 protocol, and expands terminal parameters, measuring point real-time data, frozen data, control parameters and event codes on the basis of the Q/GDW1376.1-2013 protocol.
The embodiment of the invention also provides a user transformer intelligent control method based on any one of the user transformer intelligent control devices, which comprises the following steps:
reading the data of the electric energy meter, and forming real-time data, curve data, daily freezing data, monthly freezing data and event record according to the data of the electric energy meter for the master station to read or actively report;
reading trip event data of the residual current operated protector and fault record data of the protection terminal, storing and reporting to the master station;
and reading the switching state of the reactive compensation controller, recording the state when the state change is monitored, and reporting to the master station.
The embodiment of the invention also provides an intelligent control system for the user transformer, which comprises any one of the intelligent control device for the user transformer and the power utilization information acquisition system master station.
The intelligent control device, method and system for the user transformer provided by the embodiment of the invention have the beneficial effects that: the intelligent control device, the method and the system for the user transformer comprise a special transformer terminal, a three-phase electric energy meter, a circuit breaker, a residual current action protector, a reactive compensation controller and a protection terminal, wherein the three-phase electric energy meter is used for generating electric energy meter data, the special transformer terminal is used for reading the electric energy meter data in real time, real-time data, curve data, daily freezing data, monthly freezing data and event record are formed according to the electric energy meter data and are used for a master station to read or actively report the data to the master station, the residual current action protector is used for automatically cutting off a power supply when leakage current exceeds a preset safety range to realize grounding protection, the reactive compensation controller is used for collecting line voltage and current and automatically switching compensation equipment according to a switching principle, and the protection terminal is used for realizing three-section timing limit overcurrent protection and zero-sequence current protection, the circuit breaker is used for matching with remote control, cost control, load control, quick-break protection and grounding protection to realize switching-on and switching-off operations, so that accurate load control, quick-break protection, grounding protection and the like are realized for a user transformer, the control function is perfected, and the safety of the transformer in the using process is improved.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent control device for a user transformer according to an embodiment of the present invention;
fig. 2 is a flowchart of a user transformer intelligent control method according to a third embodiment of the present invention.
Reference numerals:
1-special transformer terminal 2-three-phase electric energy meter 3-residual current action protector
4-reactive compensation controller 5-protection terminal 6-circuit breaker
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Example one
The embodiment of the invention provides an intelligent control device for a user transformer. Fig. 1 is a schematic structural diagram of a user transformer intelligent control device according to an embodiment of the present invention. As shown in fig. 1, the intelligent control device for a user transformer in this embodiment may include: the system comprises a special transformer terminal 1, a three-phase electric energy meter 2, a residual current action protector 3, a reactive compensation controller 4, a protection terminal 5 and a circuit breaker 6;
the three-phase electric energy meter 2 is used for generating electric energy meter data, and the electric energy meter data comprises at least one of the following items: current voltage, current, power factor, grid frequency, maximum demand, electricity;
the special transformer terminal 1 is connected with the three-phase electric energy meter 2 and is used for reading the data of the electric energy meter in real time and forming real-time data, curve data, daily freezing data, monthly freezing data and event recording to be read by the master station or actively reported to the master station according to the data of the electric energy meter;
the residual current operated protector 3 is used for automatically cutting off a power supply when the leakage current exceeds a preset safety range, so that grounding protection is realized;
the reactive compensation controller 4 is used for collecting line voltage and current and automatically switching compensation equipment according to the switching principle of the controller;
the protection terminal 5 is used for realizing three-segment timing limit overcurrent protection and zero-sequence current protection;
and the circuit breaker 6 is used for matching with remote control, cost control, load control, quick-break protection and grounding protection to realize switching-on and switching-off operation.
Specifically, the three-phase electric energy meter 2 (a three-phase multifunctional electric energy meter, also called a user master meter) can monitor a power grid and generate electric energy meter data in real time, the special transformer terminal 1 is connected with the three-phase electric energy meter 2 and can read the electric energy meter data in real time through the local RS485, and real-time data, curve data, daily freezing data, monthly freezing data, event records and the like are formed according to the electric energy meter data and are read by a master station or actively reported to the master station.
The real-time data may be real-time monitoring values of parameters in the power grid, such as real-time voltage and real-time current of the power grid. The curve data may be a curve obtained by plotting the monitored values of one or more time periods, such as a voltage or current variation curve in a certain period. The daily freeze data may be a monitored value at a preset time point every day, and the monthly freeze data may be a monitored value at a preset time point every month. The event record may be data for recording an abnormality of the power grid or for performing a user operation.
The real-time data, the curve data, the daily freezing data, the monthly freezing data and the event records can be stored in the special transformer terminal 1 for the master station to read, or can be actively reported to the master station by the special transformer terminal 1. The master station can be an electricity consumption information acquisition system master station, and the master station and the special transformer terminal 1 can realize communication through a wireless network such as a 2G/3G/4G network or can realize communication through a wired cable.
The residual current operated protector 3 is used for limiting leakage current to enable the leakage current not to exceed a preset safety range, and when the leakage current exceeds the preset safety range, the residual current operated protector 3 automatically cuts off a power supply to realize grounding protection.
Specifically, the residual current operated protector 3 can be connected to a secondary voltage outlet of a user transformer to detect leakage current of a power grid. In addition, residual current operated protective device 3 can also be connected with circuit breaker 6, when the leakage current surpassed preset safety range, residual current operated protective device 3 can export tripping operation signal, and control circuit breaker 6 carries out the switching-off operation, realizes ground protection. When a fault occurs, only the user circuit breaker 6 can be switched off, and the whole line is not influenced.
Preferably, the residual current operated protector 3 may also record trip event data, which may include at least one of: fault cause, fault phase, trip occurrence time, pre-trip residual current value, pre-trip voltage, pre-trip current, etc.
The special transformer terminal 1 can be further connected with the residual current operated protector 3 and used for reading the trip event data recorded by the residual current operated protector 3 in real time through a local RS485, storing the trip event data and reporting the trip event data to the master station.
And the reactive compensation controller 4 is used for collecting the voltage and the current of the line and automatically switching the compensation equipment according to a switching principle.
Specifically, the reactive compensation controller 4 may automatically control switching of the capacitor bank according to parameters such as a target power factor, a switching threshold, a power factor cut-off threshold, and a switching delay.
The special transformer terminal 1 can be connected with the reactive compensation controller 4, the switching state of the reactive compensation controller 4 is read in real time through a local RS485, and the recording state is recorded and reported to the master station when the state is monitored.
The protection terminal 5 is used for realizing quick-break protection such as three-section timing limit overcurrent protection, zero sequence current protection and the like, the current constant value and the time constant value can be independently set, and setting control words are respectively set to control the on/off of the protection. Specifically, the protection terminal 5 may be connected to the circuit breaker 6, when the line current is greater than the protection fixed value, the corresponding timer is started, if the duration reaches the setting time, the corresponding timer is set to perform an exit action, the circuit breaker 6 is controlled to perform a switching-off operation, and if the current returns within the setting time, the corresponding timer is terminated. When a fault occurs, only the user circuit breaker 6 can be switched off, and the whole line is not influenced.
Preferably, the protection terminal 5 may further generate fault log data, which includes at least one of the following: fault type, fault phase, fault current, fault occurrence time, etc. The special transformer terminal 1 can be connected with the protection terminal 5, and can be used for reading fault record data of the protection terminal 5 in real time through a local RS485, storing and reporting the fault record data to the master station.
The protection terminal 5 can also acquire the position of the circuit breaker 6 in real time, and the special transformer terminal 1 acquires the opening and closing position of the circuit breaker 6 by reading switching value data input by the protection terminal 5.
And the circuit breaker 6 is used for matching with remote control, cost control, load control, quick-break protection and grounding protection to realize switching-on and switching-off operation.
Specifically, the remote control may refer to a remote control of the opening and closing operation by a manager or a user; the charge control can be used for controlling the switching-on and switching-off operation according to the charge; the negative control can be that the opening and closing operation is controlled according to the load; the quick-break protection and the ground protection can be realized by the protection terminal 5 and the residual current operated protector 3 respectively.
Further, the dedicated transformer terminal 1 may further collect secondary current and apparent power (collection period is second level) through its own ac sampling module, judge whether abnormal conditions such as overload or overcurrent occur according to configured limit parameters, pop up a menu to display an alarm when overload or overcurrent occurs, and send a notification to a user in the form of a short message or a screen capture message.
Further, the user transformer intelligent control device described in this embodiment may further include: a voltage transformer (PT) and a Current Transformer (CT).
The voltage transformer is used for realizing the conversion from primary high voltage to secondary low voltage for the use of a protection and measurement instrument; the current transformer is used for realizing the conversion from primary large current to secondary small current and is used for protecting and measuring instruments.
This embodiment extends protect function, control function to special change terminal 1, under the condition that does not change special change terminal 1 hardware standard design, has realized functions such as ground protection, quick-break protection, reactive compensation control, overload superflow warning to the transformer area through increasing peripheral hardware and extended function stipulation, utilizes special change terminal 1 to realize the distribution management demand, has avoided the repeated investment of company, the economic loss who causes, can greatly reduce the cost investment for the company.
The intelligent control device for the user transformer provided by the embodiment comprises a special transformer terminal 1, a three-phase electric energy meter 2, a circuit breaker 6, a residual current action protector 3, a reactive compensation controller 4 and a protection terminal 5, wherein the three-phase electric energy meter 2 is used for generating electric energy meter data, the special transformer terminal 1 is used for reading the electric energy meter data in real time, forming real-time data, curve data, daily freezing data, monthly freezing data and event recording for a master station to read or actively report to the master station, the residual current action protector 3 is used for automatically cutting off a power supply when leakage current exceeds a preset safety range to realize grounding protection, the reactive compensation controller 4 is used for collecting line voltage and current and automatically switching compensation equipment according to a switching principle, and the protection terminal 5 is used for realizing three-section timing limit overcurrent protection and zero-sequence current protection, the circuit breaker 6 is used for matching with remote control, cost control, load control, quick-break protection and grounding protection to realize switching-on and switching-off operations, so that accurate load control, quick-break protection, grounding protection and the like are realized for a user transformer, the control function is perfected, and the safety of the transformer in the using process is improved.
Example two
The embodiment of the invention provides an intelligent control device for a user transformer. On the basis of the technical scheme provided by the first embodiment, in order to meet the requirements of acquisition, management and analysis of equipment such as an electric energy meter, a residual current operated protector, a reactive compensation controller, a circuit breaker, a protection terminal and the like, the embodiment expands terminal parameters, measurement point real-time data, frozen data, control parameters, event codes and the like.
Specifically, in this embodiment, the dedicated transformer terminal may communicate with the master station through a Q/GDW1376.1-2013 protocol, and extend terminal parameters, measurement point real-time data, freeze data, control parameters, and event codes on the basis of the Q/GDW1376.1-2013 protocol. Other non-illustrated functions remain consistent with the Q/GDW1376.1-2013 protocol.
1) Setting parameter (AFN 04H) and query parameter (AFN 0AH)
Table 1 setting parameter Fn definition
2) F9: terminal event record configuration settings
ERC 56: the residual current operated protector acts; ERC 59: switching a reactive compensation controller capacitor; ERC 63: and protecting the terminal from faults.
Table 2 terminal event record configuration setting data unit format
| Data content | Data format | Number of bytes |
| Event record valid flag bit | BS64 | 8 |
| Event importance level flag | BS64 | 8 |
Wherein, the event record valid flag bit: d0 to D63 position bits in order to indicate events defined by event codes ERC1 to ERC64, set to "1": the alarm event corresponding to the bit needs to be recorded; setting the position to be 0': no recording is required.
Event importance level flag bit: d0 to D63 position bits in order to indicate events defined by event codes ERC1 to ERC64, set to "1": the alarm event corresponding to the bit is an important event, after the event occurs, if the channel has an active reporting condition, the event record should be actively reported, and if the channel does not have the active reporting condition, the event record is reported through the ACD bit; setting the position to be 0': the alarm event corresponding to the bit is a general event, and only event recording is needed after the event occurs.
3) F10: terminal electric energy meter/alternate mining device configuration parameters
Adding a protocol type: protection terminal communication protocol, type number 32; residual current operated protector communication protocol, type number 50; reactive compensation controller communication protocol, type number 51.
Wherein, the communication protocol type is as follows: the numerical range is 0-255, wherein 0: the terminal does not need to read the electric energy meter/alternating current sampling device with the serial number; 1: DL/T645-1997; 2: an alternating current sampling device communication protocol; 30: DL/T645-2007; 31: the interface protocol of the serial interface connection narrow-band low-voltage carrier communication module; 32: protecting a terminal communication protocol; 50: residual current operated protector communication protocol; 51: a reactive compensation controller communication protocol; and others: and (5) standby.
4) Real-time data (AFN ═ 0CH)
(1) Circuit breaker position: class F72 data
TABLE 4 breaker position
| Data content | Data format | Number of bytes |
| Circuit breaker position | BS8 | 1 |
D0: breaker position set 0 indicates open and set 1 indicates closed; D1-D7: and (5) standby.
(2) F329: current data of residual current operated protector
TABLE 5 residual current protector Current data
| Data content | Data format | Unit of | Number of bytes |
| Time of terminal meter reading | See 1376.1 Format A.15 | Time-sharing sun, moon and |
5 |
| Current value of residual current | See 1376.1 Format A.8 | |
2 |
(3) F348: switching state of reactive compensation controller capacitor
TABLE 6 reactive compensation controller capacitance switching State
Wherein, the switching state: 1 throw in, 0 cut out.
5) Event data (AFN 0EH)
(1) ERC 56: residual current operated protector action
TABLE 7 residual current operated protector action
(2) ERC 59: reactive compensation controller capacitor switching
TABLE 8 reactive compensation controller capacitance switching
Description of the drawings: the state word displacement indicates that an alarm occurs or recovers, and the running state word is the state when the alarm occurs.
(3) ERC 63: protecting terminal faults
The types of the fault of the protection terminal are as follows: 8 major classes of faults and 4 minor classes of faults.
TABLE 9 protection terminal failure
TABLE 10 protection terminal failure record data Unit Format
| Data content | Data format | Number of bytes | |
| ERC＝63 | BIN | 1 | |
| Length Le | BIN | 1 | |
| Number of measuring | BIN | 2 | |
| The terminal records the event time: time-sharing sun, moon and year | See 1376.1 appendix A.15 | 5 | |
| Major class of failure | BIN | 1 | |
| Subclass of faults | BIN | 1 | |
| Fault current A | See 1376.1 appendix A.25 | 3 | |
| Fault current B | See 1376.1 appendix A.25 | 3 | |
| Fault current C | See 1376.1 appendix A.25 | 3 | |
| Fault current 0 | See 1376.1 appendix A.25 | 3 | |
| Time of occurrence of failure | BCD code | 9 |
TABLE 11 FAIL TIME FORMAT
| m s low | m s high | s | min | h | d | m | y is low | y is high |
The intelligent control device for the user transformer provided by the embodiment can meet the requirements of acquisition, management and analysis of equipment such as an electric energy meter, a residual current operated protector, a reactive compensation controller, a circuit breaker and a protection terminal by expanding terminal parameters, measuring point real-time data, freezing data, control parameters, event codes and the like, and can ensure the normal operation of each equipment.
EXAMPLE III
The third embodiment of the invention provides a user transformer intelligent control method based on the user transformer intelligent control device in any one of the embodiments. Fig. 2 is a flowchart of a user transformer intelligent control method according to a third embodiment of the present invention. As shown in fig. 2, the method in this embodiment may include:
And 102, reading trip event data of the residual current operated protector and fault record data of the protection terminal, and storing and reporting the data to the main station.
And 103, reading the switching state of the reactive compensation controller, recording the state when the state change is monitored, and reporting to the master station.
The execution main body of the method in this embodiment may be a dedicated terminal, and the specific principle and implementation method of each step may refer to any of the above embodiments, which are not described herein again.
Further, the user transformer intelligent control method in this embodiment may further include: collecting secondary current and apparent power; judging whether the secondary current is larger than a current limit parameter or not, and if so, judging that overcurrent occurs; judging whether the apparent power is larger than a power limit parameter, if so, judging that overload occurs; when overload or overcurrent occurs, the popup menu displays an alarm and sends a notice to a user through a short message or a message.
According to the intelligent control method for the user transformer, real-time data, curve data, daily freezing data, monthly freezing data and event recording are formed according to the data of the electric energy meter, the data are read by a master station or are actively reported to the master station, tripping event data of the residual current operated protector and fault recording data of the protection terminal are read, the master station is stored and reported, the switching state of the reactive compensation controller is read, the state is recorded and reported to the master station when the state changes, accurate load control, quick-break protection and ground protection of the user transformer can be achieved, the control function is improved, and the safety of the transformer in the using process is improved.
Example four
The fourth embodiment of the invention provides an intelligent control system for a user transformer, which comprises the intelligent control device for the user transformer and a power utilization information acquisition system master station in any embodiment.
The power consumption information acquisition system master station can acquire, process and monitor the power consumption information of power users in real time, and realizes the functions of automatic acquisition, abnormal metering monitoring, power quality monitoring, power consumption analysis and management, authority management, information release and the like of the power consumption information.
The connection and function of the components in this embodiment are similar to those in the previous embodiments, and are not described herein again.
The intelligent control system for the user transformer comprises a special transformer terminal, a three-phase electric energy meter, a circuit breaker, a residual current action protector, a reactive compensation controller and a protection terminal, wherein the three-phase electric energy meter is used for generating electric energy meter data, the special transformer terminal is used for reading the electric energy meter data in real time, real-time data, curve data, daily freezing data, monthly freezing data and event recording are formed according to the electric energy meter data and are read by a master station or are actively reported to the master station, the residual current action protector is used for automatically cutting off a power supply when leakage current exceeds a preset safety range to realize ground protection, the reactive compensation controller is used for collecting line voltage and current and automatically switching compensation equipment according to a switching principle, the protection terminal is used for realizing three-section timing limit overcurrent protection and zero-sequence current protection, and the circuit breaker is used for matching with remote control, remote, The switching-on and switching-off operation is realized by charge control, load control, quick-break protection and grounding protection, so that accurate load control, quick-break protection, grounding protection and the like are realized for a user transformer, the control function is perfected, and the safety of the transformer in the use process is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a user's transformer intelligent control device which characterized in that includes: the system comprises a special transformer terminal, a three-phase electric energy meter, a circuit breaker, a residual current action protector, a reactive compensation controller and a protection terminal;
the three-phase electric energy meter is used for generating electric energy meter data, and the electric energy meter data comprises at least one of the following items: current voltage, current, power factor, grid frequency, maximum demand, electricity;
the special transformer terminal is connected with the three-phase electric energy meter and used for reading data of the electric energy meter in real time and forming real-time data, curve data, daily freezing data, monthly freezing data and event recording to be read by the master station or actively reported to the master station according to the data of the electric energy meter;
the residual current operated protector is used for automatically cutting off a power supply when the leakage current exceeds a preset safety range, so that grounding protection is realized;
the reactive compensation controller is used for collecting line voltage and current and automatically switching the compensation equipment according to a switching principle;
the protection terminal is used for realizing three-section timing limit overcurrent protection and zero-sequence current protection;
the circuit breaker is used for realizing switching-on and switching-off operations in cooperation with remote control, cost control, load control, quick-break protection and grounding protection;
the special transformer terminal is communicated with the master station through a Q/GDW1376.1-2013 protocol, and expands terminal parameters, measuring point real-time data, frozen data, control parameters and event codes on the basis of the Q/GDW1376.1-2013 protocol;
the special transformer terminal is also used for collecting secondary current and apparent power through the alternating current sampling module, judging whether overload or overcurrent occurs according to the configured limit value parameters, popping up a menu to display an alarm when the overload or overcurrent occurs, and sending a notice to a user through a message.
2. The intelligent control device for a user transformer according to claim 1,
the residual current operated protector is further used for recording trip event data, wherein the trip event data comprises at least one of the following items: fault reason, fault phase, trip occurrence time, residual current value before trip, voltage before trip and current before trip;
and the special transformer terminal is also used for reading the trip event data recorded by the residual current operated protector in real time, storing and reporting the trip event data to the master station.
3. The intelligent control device for a user transformer according to claim 1,
the protection terminal is also used for realizing independent setting of a current fixed value and a time fixed value, setting control words are respectively set, and switching on and off of protection is controlled; and when the line current is greater than the protection fixed value, starting a corresponding timer, controlling the breaker to execute a switching-off operation if the duration time reaches the setting time, and stopping the timer if the current returns within the setting time limit.
4. The intelligent control device for a user transformer according to claim 1,
the protection terminal is further configured to generate fault log data, where the fault log data includes at least one of: fault type, fault phase, fault current and fault occurrence time;
and the special transformer terminal is also used for reading the fault record data of the protection terminal in real time, storing and reporting the fault record data to the main station.
5. The intelligent control device for a user transformer according to claim 1,
the reactive compensation controller automatically controls the switching of the capacitor bank according to the target power factor, the switching threshold, the power factor cut-off threshold and the switching delay;
and the special transformer terminal is also used for reading the switching state of the reactive compensation controller in real time, recording the state when the state is monitored, and reporting the state to the main station.
6. The intelligent control device for a user transformer according to claim 1,
the protection terminal is also used for acquiring the position of the circuit breaker in real time, and the special transformer terminal acquires the opening and closing position of the circuit breaker by reading input switching value data of the protection terminal.
7. The intelligent control device for a user transformer according to claim 1, further comprising: a voltage transformer and a current transformer;
the voltage transformer is used for realizing the conversion from primary high voltage to secondary low voltage for the use of a protection and measurement instrument;
the current transformer is used for realizing the conversion from primary large current to secondary small current and is used for protecting and measuring instruments.
8. A method for controlling the intelligent transformer of a user based on the intelligent transformer control device of any one of claims 1-7, comprising:
reading the data of the electric energy meter, and forming real-time data, curve data, daily freezing data, monthly freezing data and event record according to the data of the electric energy meter for the master station to read or actively report;
reading trip event data of the residual current operated protector and fault record data of the protection terminal, storing and reporting to the master station;
and reading the switching state of the reactive compensation controller, recording the state when the state change is monitored, and reporting to the master station.
9. A user transformer intelligent control system, characterized by comprising: the intelligent control device for the user transformer and the power utilization information acquisition system main station as claimed in any one of claims 1 to 7.
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| CN201711295214.6A CN108183491B (en) | 2017-12-08 | 2017-12-08 | Intelligent control device, method and system for user transformer |
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| CN201711295214.6A CN108183491B (en) | 2017-12-08 | 2017-12-08 | Intelligent control device, method and system for user transformer |
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| CN201515183U (en) * | 2009-10-22 | 2010-06-23 | 泉州科力电气有限公司 | Intelligent integrated distribution box with leakage protection remote monitoring function |
| CN104410169A (en) * | 2014-12-18 | 2015-03-11 | 国网四川大英县供电有限责任公司 | Intelligent and online area monitoring system and implementation method thereof |
| CN104597301A (en) * | 2015-01-20 | 2015-05-06 | 郑州三晖电气股份有限公司 | Novel acquiring terminal of specific power transformer |
| CN106229998A (en) * | 2016-08-16 | 2016-12-14 | 安徽众升电力科技有限公司 | A kind of electric power monitoring system |
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| EP2331978B1 (en) * | 2008-09-24 | 2014-05-07 | ABB Research Ltd. | Method and device for supervising secondary circuit of instrument transformer in power system |
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| CN201515183U (en) * | 2009-10-22 | 2010-06-23 | 泉州科力电气有限公司 | Intelligent integrated distribution box with leakage protection remote monitoring function |
| CN104410169A (en) * | 2014-12-18 | 2015-03-11 | 国网四川大英县供电有限责任公司 | Intelligent and online area monitoring system and implementation method thereof |
| CN104597301A (en) * | 2015-01-20 | 2015-05-06 | 郑州三晖电气股份有限公司 | Novel acquiring terminal of specific power transformer |
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