CN107221939B - The control of reactive power compensating group network system and its capacity diffused integration compensation method - Google Patents
The control of reactive power compensating group network system and its capacity diffused integration compensation method Download PDFInfo
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- CN107221939B CN107221939B CN201710585944.3A CN201710585944A CN107221939B CN 107221939 B CN107221939 B CN 107221939B CN 201710585944 A CN201710585944 A CN 201710585944A CN 107221939 B CN107221939 B CN 107221939B
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/002—Flicker reduction, e.g. compensation of flicker introduced by non-linear load
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- 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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- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention discloses a kind of the control of reactive power compensating group network system and its capacity diffused integration compensation method, and main control module sampling calculates the operation data of power grid；Those intelligent electric power capacitance modules power on after automatically by fieldbus to main control module carry out networking registration；Main control module distributes different addresses to the intelligent electric power capacitance module of registration；Main control module carries out the operation information of those intelligent electric power capacitance modules of the control of reactive power compensating and automatic regular polling, when the practical compensation capacity in the operation information of the intelligent electric power capacitance module of current poll decays to setting value, then the intelligent electric power capacitance module for controlling current poll sets recombination and marks and record practical compensation capacity；The information for the intelligent electric power capacitance module that those set recombination label is inquired in main control module timing, according to the practical compensation capacity of record from matched in the intelligent electric power capacitance module that those set recombination label and a certain intelligent electric power capacitance module decay before capacity comparable combination intelligent electric capacitor module.
Description
Technical field
Present invention is mainly applied to reactive compensation fields, more particularly to a kind of the control of reactive power compensating group network system and its appearance
Measure diffused integration compensation method.
Background technique
Current low-pressure reactive compensation it is main or by electric capacitor come compensating reactive power, indicate every road in control system
Compensation capacity is normal capacity, and the capacity of electric capacitor can decay with working time and work power grid environment, when control is
When the mark capacity and electric capacitor actual capacity of system differ greatly, control system vibrates the unstable of change, when serious
Entire distribution system can be endangered.
Summary of the invention
The present invention is in view of the problems of the existing technology and insufficient, provides a kind of the control of reactive power compensating group network system and its appearance
Diffused integration compensation method is measured, without manual intervention, the actual capacity of each intelligent electric power capacitance module is carried out system automatically
Amendment, and integration merging is carried out according to the optimum capacity step-length that system was set originally, to form new the control of reactive power compensating
System, anti-locking system throw in-of oscillation, endangers distribution system.
The present invention is to solve above-mentioned technical problem by following technical proposals:
The present invention provides a kind of the control of reactive power compensating group network system, it is characterized in that comprising a main control module and multiple
Intelligent electric power capacitance module, between those intelligent electric power capacitance modules and the main control module and the intelligent electric power capacitance module it
Between by fieldbus connect, the main control module and those intelligent electric power capacitance modules are connect with power grid bus；
The main control module is used to sample the operation data for calculating power grid；
Those intelligent electric power capacitance modules are for carrying out networking note to the main control module automatically by fieldbus after powering on
Volume；
The main control module is also used to distribute different addresses to the intelligent electric power capacitance module of registration；
The main control module is also used to carry out the operation of those intelligent electric power capacitance modules of the control of reactive power compensating and automatic regular polling
Information, when the practical compensation capacity in the operation information of the intelligent electric power capacitance module of current poll decays to setting value, then
The intelligent electric power capacitance module for controlling current poll sets recombination and marks and record practical compensation capacity；
The main control module be also used to timing inquire those set recombination label intelligent electric power capacitance module information, and according to
The practical compensation capacity of record matches and a certain intelligent electric power electricity from the intelligent electric power capacitance module that those set recombination label
The comparable combination intelligent electric capacitor module of capacity before molar block is decayed.
Preferably, the control of reactive power compensating group network system further includes the Current Mutual Inductance of a running current for acquiring power grid
Device, the main control module are connect with the current transformer.
Preferably, include inside the intelligent electric power capacitance module signal sample circuit, operating passing zero switch, electric capacitor,
Temperature measurement circuit, microprocessor and communication unit；
Power grid bus main circuit respectively enters the input terminal of operating passing zero switch and the input terminal of the signal sample circuit,
The output end of operating passing zero switch is connected to the input terminal of the electric capacitor, and the output end of the electric capacitor connects thermometric electricity
The input terminal on road, the output end of the temperature measurement circuit and the output end of the signal sample circuit are all connected with the input of the microcontroller
End, operating passing zero switch connect the microcontroller, which connects the communication unit, and communication unit connection scene is total
Line.
Preferably, each intelligent electric power capacitance module for setting monomark after the power-up, sends to fieldbus and registers
Frame, the registered frame include 96 ID, intelligent electric power capacitance module type and the capacitance of intelligent electric power capacitance module；
Each intelligent electric power capacitance module is also used to judge to send whether succeed, and the subsequent supervention that is then delayed when to be no is sent directly
Until sending successfully, the main control module is then waited to send acknowledgement frame when to be；
The main control module is used for after receiving the registered frame, sends the response to corresponding intelligent electric power capacitance module
Frame, which contains the address of 96 ID and distribution of corresponding intelligent electric power capacitance module, and the main control module is also used
In 96 ID are associated to form registration table one by one with the address of distribution.
Preferably, the main control module is used to be polled those intelligent electric power capacitance modules according to the registration table, and judge
Whether the intelligent electric power capacitance module of current poll replys within the set time, by the intelligent electric power electricity of current poll when to be no
Molar block is removed from the registration table, and the reply data containing practical compensation capacity is received when to be, judgement is current thereafter
When whether the practical compensation capacity of the intelligent electric power capacitance module of poll decays to the setting value, the registration is then controlled when to be
The intelligent electric power capacitance module of current poll sets recombination and marks and record practical compensation capacity in table；
The main control module is also used to the recombination mark information that each intelligent electric power capacitance module in the registration table is inquired in timing,
The intelligent electric power capacitance module for having recombination label is put into recombination list, according to the practical compensation of record in recombination list
Capacity matching goes out and the comparable combination intelligent electric capacitor module of capacity before the decaying of a certain intelligent electric power capacitance module.
The present invention also provides a kind of capacity diffused integration compensation methodes, it is characterized in that, utilize above-mentioned reactive compensation
Group network system is controlled to realize, method includes the following steps:
S1, main control module sampling calculate the operation data of power grid；
S2, those intelligent electric power capacitance modules power on after automatically by fieldbus to the main control module carry out networking note
Volume；
S3, the main control module distribute different addresses to the intelligent electric power capacitance module of registration；
S4, the main control module carry out the operation letter of those intelligent electric power capacitance modules of the control of reactive power compensating and automatic regular polling
Breath, when the practical compensation capacity in the operation information of the intelligent electric power capacitance module of current poll decays to setting value, is then controlled
The intelligent electric power capacitance module for making current poll sets recombination and marks and record practical compensation capacity；
S5, main control module timing inquire the information for the intelligent electric power capacitance module that those set recombination label, and according to note
The practical compensation capacity of record matches and a certain intelligent electric power capacitor from the intelligent electric power capacitance module that those set recombination label
The comparable combination intelligent electric capacitor module of capacity before module decays.
Preferably, in step s 2, each intelligent electric power capacitance module sets monomark after the power-up, sent out to fieldbus
Registered frame is sent, which includes 96 ID, intelligent electric power capacitance module type and the capacitance of intelligent electric power capacitance module；
Each intelligent electric power capacitance module judges to send whether succeed, and the subsequent supervention that is then delayed when to be no is sent until sending
Until success, the main control module is then waited to send acknowledgement frame when to be；
In step s3, which sends out after receiving the registered frame to corresponding intelligent electric power capacitance module
The acknowledgement frame is given, which contains the address of 96 ID and distribution of corresponding intelligent electric power capacitance module, and by 96
ID associate to form registration table one by one with the address of distribution.
Preferably, in step s 4, which is polled those intelligent electric power capacitance modules according to the registration table,
And judge whether the intelligent electric power capacitance module of current poll replys within the set time, by the intelligence of current poll when to be no
Electric capacitor module is removed from the registration table, and the reply data containing practical compensation capacity is received when to be, is sentenced thereafter
When whether the practical compensation capacity of intelligent electric power capacitance module of current poll of breaking decays to the setting value, then controlled when to be
The intelligent electric power capacitance module of current poll sets recombination and marks and record practical compensation capacity in the registration table；
In step s 5, the recombination label of each intelligent electric power capacitance module in the registration table is inquired in main control module timing
The intelligent electric power capacitance module for having recombination label is put into recombination list by information, according to the reality of record in recombination list
Border compensation capacity matches and the comparable combination intelligent electric capacitor module of capacity before the decaying of a certain intelligent electric power capacitance module.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can any combination to get each preferable reality of the present invention
Example.
The positive effect of the present invention is that:
The control of reactive power compensating group network system of the invention uses capacity diffused integration compensation technique, can be the electric power of decaying
The capacity of capacitor carries out system amendment recombination, turns parts into the whole, keeps reactive compensation control system stable and reliable in work, anti-locking system is thrown
Oscillation is cut, distribution system is endangered.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the control of reactive power compensating group network system of present pre-ferred embodiments.
Fig. 2 is the structural schematic diagram of the intelligent electric power capacitance module of present pre-ferred embodiments.
Fig. 3 is the intelligent electric power capacitance module networking flow chart of present pre-ferred embodiments.
Fig. 4 is the main control module capacity check and capacity recombination method flow chart of present pre-ferred embodiments.
Fig. 5 is the main control module capacity recombination method flow chart of present pre-ferred embodiments.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, the present embodiment provides a kind of the control of reactive power compensating group network systems comprising a main control module 1, multiple
The current transformer 5 of intelligent electric power capacitance module 2 and a running current for acquiring power grid, those intelligent electric power capacitance modules
It is connected between 2 and by fieldbus 3 between the main control module 1 and the intelligent electric power capacitance module 2,1 He of main control module
Those intelligent electric power capacitance modules 2 are connect with power grid bus 4, which connect with the current transformer 5.
The main control module 1 carries out data sampling by running current of the current transformer 5 to power grid, in conjunction with power grid bus electricity
Pressure sampling calculates the operation data of power grid, such as voltage, electric current, active power, reactive power, power factor.
Those intelligent electric power capacitance modules 2 power on after automatically by fieldbus 3 to the main control module 1 carry out networking note
Volume, which distributes different addresses to the intelligent electric power capacitance module 2 of registration, after being assigned, automatic regular polling system
In all intelligent electric power capacitance modules 2 operation information.
As shown in Fig. 2, the inside of the intelligent electric power capacitance module 2 includes signal sample circuit, operating passing zero switch, electric power
Capacitor, temperature measurement circuit, microprocessor and communication unit；Power grid bus main circuit respectively enters the input terminal of operating passing zero switch
The input terminal of the electric capacitor, the electricity are connected to the output end of the input terminal of the signal sample circuit, operating passing zero switch
The output end of power capacitor connects the input terminal of the temperature measurement circuit, the output of the output end and the signal sample circuit of the temperature measurement circuit
End is all connected with the input terminal of the microcontroller, and operating passing zero switch connects the microcontroller, which connects the communication
Unit, the communication unit connect fieldbus.
Voltage bus signal enters the microprocessor, the microprocessor after the signal sample circuit is adjusted filtering
Carry out Data Management Analysis；The electric capacitor temperature sensing is output to the input terminal of the temperature measurement circuit, the output of the temperature measurement circuit
End is connected to the input terminal of the microprocessor；Operating passing zero switch zero passage synchronization signal is output to the input of the microprocessor
End, while microprocessor control I/O is output to the control signal of operating passing zero switch；The output end of the microprocessor connects
It is connected to the communication unit input terminal, which is output to the fieldbus.
Multiple intelligent electric power capacitance modules pass through fieldbus and main control module forming control system, this group of network process is
Be automatically performed, network-building method is as shown in Figure 3: each intelligent electric power capacitance module begins to set monomark after powering on, to now
Field bus sends registered frame, and registered frame includes 96 ID, intelligent electric power capacitance module type and the electricity of intelligent electric power capacitance module
Hold capacity information；Each intelligent electric power capacitance module judges to send whether succeed, and the subsequent supervention that is delayed when unsuccessful is sent until hair
Until sending successfully；Main control module is then waited to issue the acknowledgement frame of this module after after sending successfully.
Main control module sends acknowledgement frame, acknowledgement frame after receiving registered frame, to corresponding intelligent electric power capacitance module
The address of 96 ID and distribution of corresponding intelligent electric power capacitance module are contained, and one by one by the address of 96 ID and distribution
It associates to form registration table.
As shown in figure 4, main control module is polled those intelligent electric power capacitance modules according to registration table, and judge to work as front-wheel
The intelligent electric power capacitance module of inquiry whether normal response, if the non-normal response of intelligent electric power capacitance module, time-out count add
1, after time-out count reaches certain value, main control module is removed the intelligent electric power capacitance module of time-out from registration table；If
Intelligent electric power capacitance module normal response contains the practical compensation capacity, current of intelligent electric power capacitance module in reply data
The information such as state, capacitance temperature, main control module compare the capacity in actual capacitance capacity and registration table, judge the intelligence of current poll
Can the practical compensation capacity of electric capacitor module when whether decaying to setting value, after decaying to setting value, in registration table when
The intelligent electric power capacitance module of preceding poll sets recombination label, and records practical compensation capacity.
As shown in figure 5, the recombination mark information of each intelligent electric power capacitance module of registration table is inquired in main control module timing,
Intelligent electric power capacitance module with recombination label is put into recombination list, in recombination list, according to the practical compensation of record
The comparable combination intelligent electric capacitor module of capacity, updates thereafter before capacity matching is decayed with a certain intelligent electric power capacitance module out
Switching list.Such as: former module capacity is 30kvar, decays to 15kvar now, and recombinated in list at this time have 10kvar and
The module of 8kvar just combines these three module capacities, forms the combination of 33kvar, forms combination mainly in logic
On associate, the throwing simultaneously of the module that associates of main control module control or cut simultaneously, can achieve physically combine in this way
Effect.
The control of reactive power compensating group network system of the invention carries out power grid by main control module coordinated control reactive compensation system
Reactive compensation, and in compensation process, each intelligent electric power capacitance module operating parameter is monitored, and then adjust compensation way.
Reactive compensation system of the invention uses the networking mode of intelligent electric power capacitance module plug and play, greatly improves
In-site installation and debugging efficiency.Each intelligent electric power capacitance module has 96 globally unique condition codes, and group network process is just
It is that each intelligent electric power capacitance module is registered to 96 condition codes of main control module transmission, main control module can distribute control system
Unique address give intelligent electric power capacitance module, when multiple intelligent electric power capacitance modules send registration information simultaneously, by existing
Field bus arbitration, the intelligent electric power capacitance module of low priority exits, in this way until all intelligent electric power capacitance modules are all completed
Registration.
In system work process, main control module can include according to registration order automatic regular polling module information, polling message
The operating status of module, practical compensation capacity and runing time.Intelligent electric power capacitance module time-out dont answer is corresponded to when poll,
Then judge that this intelligent electric power capacitance module communication failure or intelligent electric power capacitance module send event of failure, main control module just
This intelligent electric power capacitance module is rejected from registration table.
In compensation process, the capacity of intelligent electric power capacitance module can be main with the time and when decaying to certain value or less
Two or three intelligent electric power capacitance module capacity are combined merging by control module in logic, are combined using former module capacity as mesh
Mark reference, composition is at a group by a group, and main control module is when switching controls, combined module while switching, to reach physically
Merge effect.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
Under the premise of from the principle and substance of the present invention, many changes and modifications may be made, but these are changed
Protection scope of the present invention is each fallen with modification.
Claims (8)
1. a kind of the control of reactive power compensating group network system, which is characterized in that it includes a main control module and multiple intelligent electric power capacitors
Module, it is total by scene between those intelligent electric power capacitance modules and between the main control module and the intelligent electric power capacitance module
Line connection, the main control module and those intelligent electric power capacitance modules are connect with power grid bus；
The main control module is used to sample the operation data for calculating power grid；
Those intelligent electric power capacitance modules are for carrying out networking registration to the main control module automatically by fieldbus after powering on；
The main control module is also used to distribute different addresses to the intelligent electric power capacitance module of registration；
The main control module is also used to carry out the operation information of those intelligent electric power capacitance modules of the control of reactive power compensating and automatic regular polling,
When the practical compensation capacity in the operation information of the intelligent electric power capacitance module of current poll decays to setting value, then control is worked as
The intelligent electric power capacitance module of preceding poll sets recombination and marks and record practical compensation capacity；
The main control module is also used to the information that the intelligent electric power capacitance module that those set recombination label is inquired in timing, and according to record
Practical compensation capacity from those set recombination label intelligent electric power capacitance module in match and a certain intelligent electric power capacitor mould
The comparable combination intelligent electric capacitor module of capacity before block is decayed.
2. the control of reactive power compensating group network system as described in claim 1, which is characterized in that the control of reactive power compensating group network system
It further include the current transformer of a running current for acquiring power grid, which connect with the current transformer.
3. the control of reactive power compensating group network system as described in claim 1, which is characterized in that inside the intelligent electric power capacitance module
Including signal sample circuit, operating passing zero switch, electric capacitor, temperature measurement circuit, microprocessor and communication unit；
Power grid bus respectively enters the input terminal of operating passing zero switch and the input terminal of the signal sample circuit, the operating passing zero
The output end of switch is connected to the input terminal of the electric capacitor, and the output end of the electric capacitor connects the input of the temperature measurement circuit
End, the output end of the temperature measurement circuit and the output end of the signal sample circuit are all connected with the input terminal of the microcontroller, the zero passage
Fling-cut switch connects the microcontroller, which connects the communication unit, which connects fieldbus.
4. the control of reactive power compensating group network system as described in claim 1, which is characterized in that each intelligent electric power capacitance module is used
In setting monomark after the power-up, registered frame is sent to fieldbus, which includes 96 of intelligent electric power capacitance module
ID, intelligent electric power capacitance module type and capacitance；
Each intelligent electric power capacitance module is also used to judge to send whether succeed, and the subsequent supervention that is then delayed when to be no is sent until hair
Until sending successfully, the main control module is then waited to send acknowledgement frame when to be；
The main control module is used for after receiving the registered frame, sends the acknowledgement frame to corresponding intelligent electric power capacitance module,
The acknowledgement frame contains the address of 96 ID and distribution of corresponding intelligent electric power capacitance module, and the main control module be also used to by
96 ID associate to form registration table one by one with the address of distribution.
5. the control of reactive power compensating group network system as claimed in claim 4, which is characterized in that the main control module is used for according to the note
Volume table is polled those intelligent electric power capacitance modules, and judges the intelligent electric power capacitance module of current poll within the set time
Whether reply, the intelligent electric power capacitance module of current poll is removed from the registration table when to be no, is received when to be
Reply data containing practical compensation capacity judges that thereafter the practical compensation capacity of the intelligent electric power capacitance module of current poll is
Not no when decaying to the setting value, the intelligent electric power capacitance module that current poll in the registration table is then controlled when to be sets recombination mark
Remember and records practical compensation capacity；
The main control module is also used to the recombination mark information that each intelligent electric power capacitance module in the registration table is inquired in timing, will have
The intelligent electric power capacitance module for having recombination to mark is put into recombination list, according to the practical compensation capacity of record in recombination list
Match the comparable combination intelligent electric capacitor module of capacity before decaying with a certain intelligent electric power capacitance module.
6. a kind of capacity diffused integration compensation method, which is characterized in that it utilizes the control of reactive power compensating as described in claim 1
Group network system realization, method includes the following steps:
S1, main control module sampling calculate the operation data of power grid；
S2, those intelligent electric power capacitance modules power on after automatically by fieldbus to the main control module carry out networking registration；
S3, the main control module distribute different addresses to the intelligent electric power capacitance module of registration；
S4, the main control module carry out the operation information of those intelligent electric power capacitance modules of the control of reactive power compensating and automatic regular polling, when
When practical compensation capacity in the operation information of the intelligent electric power capacitance module of current poll decays to setting value, then control is current
The intelligent electric power capacitance module of poll sets recombination and marks and record practical compensation capacity；
S5, main control module timing inquire the information for the intelligent electric power capacitance module that those set recombination label, and according to record
Practical compensation capacity matches and a certain intelligent electric power capacitance module from the intelligent electric power capacitance module that those set recombination label
The comparable combination intelligent electric capacitor module of capacity before decaying.
7. capacity diffused integration compensation method as claimed in claim 6, which is characterized in that in step s 2, each intelligence electricity
Power capacitance module sets monomark after the power-up, sends registered frame to fieldbus, which includes intelligent electric power capacitor mould
96 ID, intelligent electric power capacitance module type and the capacitance of block；
Each intelligent electric power capacitance module judges to send whether succeed, and the subsequent supervention that is then delayed when to be no is sent until sending successfully
Until, then wait the main control module to send acknowledgement frame when to be；
In step s3, for the main control module after receiving the registered frame, sending to corresponding intelligent electric power capacitance module should
Acknowledgement frame, the acknowledgement frame contain the address of 96 ID and distribution of corresponding intelligent electric power capacitance module, and by 96 ID
It associates to form registration table one by one with the address of distribution.
8. capacity diffused integration compensation method as claimed in claim 7, which is characterized in that in step s 4, the main control module
Those intelligent electric power capacitance modules are polled according to the registration table, and judge that the intelligent electric power capacitance module of current poll is being set
Whether replied in fixing time, the intelligent electric power capacitance module of current poll is removed from the registration table when to be no, is being yes
When receive the reply data containing practical compensation capacity, judge the practical benefit of the intelligent electric power capacitance module of current poll thereafter
When repaying capacity and whether decaying to the setting value, the intelligent electric power capacitance module of current poll in the registration table is then controlled when to be
Recombination is set to mark and record practical compensation capacity；
In step s 5, the recombination label letter of each intelligent electric power capacitance module in the registration table is inquired in main control module timing
The intelligent electric power capacitance module for having recombination label is put into recombination list by breath, according to the reality of record in recombination list
Compensation capacity matches and the comparable combination intelligent electric capacitor module of capacity before the decaying of a certain intelligent electric power capacitance module.
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| CN109818360B (en) * | 2019-02-27 | 2021-04-30 | 中国地质科学院地球物理地球化学勘查研究所 | Combined capacitance compensation device and connection method |
| CN110224412A (en) * | 2019-05-21 | 2019-09-10 | 江苏斯菲尔电气股份有限公司 | The low voltage reactive compensation cabinet that initiative alarming uploads |
| CN111030113A (en) * | 2019-12-04 | 2020-04-17 | 江苏斯菲尔电气股份有限公司 | Multi-module APF parallel control system and method |
| CN112867140A (en) * | 2021-01-05 | 2021-05-28 | 珠海格力电器股份有限公司 | Communication method and device of Internet of things equipment |
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| CN105071411A (en) * | 2015-09-17 | 2015-11-18 | 延边国大节能技术设备有限公司 | Intelligent modular reactive power compensation device and networking method |
| CN106300380A (en) * | 2016-08-27 | 2017-01-04 | 宁波三星智能电气有限公司 | A kind of system of selection of reactive-load compensation capacitor |
| CN206237137U (en) * | 2016-11-03 | 2017-06-09 | 江苏斯菲尔电气股份有限公司 | Reactive compensation system based on automatic network-building technology |
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