CN104538975A - Reactive compensation method and device having transformer reactive current real-time compensation function - Google Patents

Reactive compensation method and device having transformer reactive current real-time compensation function Download PDF

Info

Publication number
CN104538975A
CN104538975A CN201410828943.3A CN201410828943A CN104538975A CN 104538975 A CN104538975 A CN 104538975A CN 201410828943 A CN201410828943 A CN 201410828943A CN 104538975 A CN104538975 A CN 104538975A
Authority
CN
China
Prior art keywords
current
transformer
reactive
compensation
svg
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201410828943.3A
Other languages
Chinese (zh)
Other versions
CN104538975B (en
Inventor
王森
张丽娟
高鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
XI'AN ACTIONPOWER ELECTRICAL CO Ltd
Original Assignee
XI'AN ACTIONPOWER ELECTRICAL CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by XI'AN ACTIONPOWER ELECTRICAL CO Ltd filed Critical XI'AN ACTIONPOWER ELECTRICAL CO Ltd
Priority to CN201410828943.3A priority Critical patent/CN104538975B/en
Publication of CN104538975A publication Critical patent/CN104538975A/en
Application granted granted Critical
Publication of CN104538975B publication Critical patent/CN104538975B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • H02J3/1878—Arrangements for adjusting, eliminating or compensating reactive power in networks using tap changing or phase shifting transformers
    • 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
    • Y02E40/10—Flexible AC transmission systems [FACTS]

Abstract

The invention discloses a reactive compensation method and device having a transformer reactive current real-time compensation function and belongs to the field of electric energy quality control. The reactive compensation method and device are used for conducting real-time calculation on the no-load loss and the loss (changing along with the load rate) in the load-available condition, real-time compensation of reactive current of a transformer is achieved, and the problem that the power factor is low due to the reactive loss of the transformer is solved. Meanwhile, the optimal control theory is used for calculating the switching strategy of capacitance compensation of an SVG and a TSC, switching of the SVG and the TSC can reach the optimized effect, and the advantages of fastness and nonpolarity are achieved completely.

Description

There is reactive-load compensation method and the device of transformer reactive current real-Time Compensation function
Technical field
The present invention relates to a kind of Intelligent dynamic reactive power compensation device, belong to utility power quality control field.
Background technology
Along with the development of electric power system, the demand of reactive power being carried out to quick dynamic compensation is also increasing, therefore fast response time, continuously adjustabe, simple to operate, the low new demand becoming reactive power compensation of cost.
Early stage reactive power dynamic compensation device is synchronous compensator, but due to it be electric rotating machine, therefore loss, noise are comparatively large, and operation maintenance is complicated, response speed is slow, therefore gradually replace by static var compensator (SVC).
Although SVC has quick response, safeguards simple, high reliability, the shortcoming also having equipment volume greatly, easily to produce harmonic wave, easily resonance occurs, can not regulate continuously simultaneously.
The appearance of static reacance generator (SVG), avoid the shortcoming of SVC, the general principle of SVG will be parallel on electrical network by reactor from changing bridge circuit, the phase place of suitable adjustment bridge circuit ac output voltage and amplitude, or directly control its ac-side current, this circuit just can be made to absorb or send the reactive current met the demands, realize the object of reactive power compensation.Though compare that SVC response speed is faster, range of operation is wider, can regulate continuously, because cost is high, fail extensive use.
Market there is TSC and SVG mode used in combination, but be all simple combination substantially, cooperation is not between the two compensated and carry out optimized control, the electrodeless compensation often mentioned, the compensation of unloaded small area analysis, rapidity, prevent overcompensation from all not realizing.
When examining the power factor of user, normally examine the power factor value of transformer primary side, i.e. the power of transformer consumption has also participated in the calculating of power factor, and the reactive loss of transformer comprises unloaded reactive loss and the reactive loss with load factor change.That is the power factor of user is examined to include the reactive loss of transformer and the reactive loss of load.But present all compensation arrangement major parts are with the reactive power in compensating load, do not consider the impact of reactive power on power factor of transformer, the power factor of so long-time accumulation user cannot be up to standard, result in the fine of power supply administration; Or to the compensation that the reactive power compensation of transformer is fixed, or instrument transformer be put into transformer primary side carry out detecting this mode metrical error can be very large, these all can not compensate the reactive power of transformer well in real time.
Summary of the invention
The reactive power of transformer is not compensated to solve existing compensation arrangement, and then cause the technical problem that the power factor of user cannot be up to standard, the invention provides a kind of Intelligent dynamic reactive power compensation device and the compensation method that have transformer reactive current real-Time Compensation function.
Technical solution of the present invention is as follows:
Have an Intelligent Dynamic reactive-load compensation method for transformer reactive current real-Time Compensation function, its special character is: comprise the following steps:
1] current on line side parameter, the current instantaneous value of static reacance generator SVG output, the DC bus-bar voltage instantaneous value of static reacance generator SVG are gathered,
2] according to the current instantaneous value computational load offset current iF* instruction that current on line side parameter and static reacance generator SVG export;
Not only 3] according to current on line side parameter and transformer parameter calculating transformer reactive power compensation current i T* instruction, transformer reactive compensation current i T* instruction comprises the compensation of unloaded reactive loss but also comprises the reactive power compensation changed with load factor transformer;
4] idle for transformer supplemental current iT* instruction is added in load-compensating current iF* instruction, obtains final offset current I* instruction;
5] according to final offset current I* instruction, the control information of static reacance generator SVG is exported;
Simultaneously according to final offset current I* instruction, calculate the minimum capacity group quantity that TSC needs to drop into, utilize optimal control theory, select optimum switching combination, export TSC control signal;
6] adjust the output order I* of SVG before and after TSC switching in real time, realize the nonpolarity of control.
State equation (1) and the given initial state (2) of above-mentioned optimal control theory are:
x(t)＝f(x(t)，u(t)，t)， (1)
x(t 0)＝t 0(2)
U (t) is input: the size of t net side reactive power;
X (t) is for exporting: the reactive power of t SVG and TSC;
X (t 0) reactive power that exports for previous moment SVG and TSC;
The object set (3) of regulation is:
M{x(t f):x(t f)∈R n,g 1(x(t f),t f)＝0,g 1(x(t f),t f)≤0} (3)
R nfor the capacity that total circuitry number of electric capacity is corresponding;
G 1for the capacity of complete machine;
X (t f) be t fmoment needs the capacity dropped into;
The control strategy demand fulfillment switching capacitance circuitry number of optimal control is minimum, SVG first compensates, the condition of electrodeless compensation, according to these restrictive conditions, makes target function (4)
J [ u ( . ) ] = S ( x ( t f ) , t f ) + ∫ 0 t f L ( x ( t ) , u ( t ) , t ) dt - - - ( 4 ) For minimum;
Wherein J [u (.)] represents net side reactive power; S (x (t f), t f) represent the reactive power of load;
table is SVG reactive power;
This function is solved, is designated as u *t (), claims u *t () is optimal control.Also namely optimum switching combination (comprise SVG, organize electric capacity more).
Have an Intelligent dynamic reactive power compensation device for transformer reactive current real-Time Compensation function, its special character is:
Comprise static reacance generator SVG, thyristor control switched capacitor TSC and controller,
Described controller comprises sampling and relay board, control board, IGBT drive plate, thyristor driver plate,
Described sampling and relay board are surveyed electric current to net and are gathered and the current information of collection is fed back to control board,
According to Switching Strategy and optimal control theory, described control board show that switching combines, and adjust the output order of static reacance generator SVG before and after thyristor control switched capacitor TSC switching in real time; Send control information to IGBT drive plate and thyristor driver plate,
Described IGBT drive plate is used for the control of static reacance generator SVG, and described thyristor driver plate is used for the control of thyristor control switched capacitor TSC.
Above-mentioned Intelligent dynamic reactive power compensation device also comprises touch-screen, and the situation that the output current to complete machine of described touch-screen, net are surveyed is monitored in real time, and the state display of complete machine, and fault reports.
The present invention, owing to taking above technical scheme, has the following advantages:
The advantages such as the present invention can realize nonpolarity compensation, better can improve power factor, and capacity is large, fast response time, and economic benefit is high, are applicable to the spread of electric power system, are specially:
1, present invention achieves Hybrid mode, utilizing the switching of optimal control theory to SVG and electric capacity to carry out optimum configuration, is not simple combination, achieve stepless, compensate fast, reduce the switching frequency of electric capacity, improve capacitor life-span, realize the rapidity of Hybrid mode and nonpolarity;
2, the present invention simultaneously to the unloaded reactive power consumption of transformer, have reactive power consumption during load to carry out real-time calculating, realize the real-Time Compensation of transformer reactive current, achieve idle to load, transformer is idle compensates simultaneously, solves the problem that the power factor that causes because of transformer reactive power is low.
Accompanying drawing explanation
Fig. 1 is the electrical connection diagram of control section;
Fig. 2 is the control flow chart of Hybrid mode.
Embodiment
Below from principle of the present invention, by reference to the accompanying drawings the present invention is elaborated.
The present invention realizes the optimization of SVG and TSC Hybrid mode by real-time checking network side current instantaneous value, simultaneously the reactive loss of real-Time Compensation transformer, is embodied in following two aspects:
1, optimal control
According to the size detecting the net side reactive power come, determine the Capacitor banks number that need drop into, again using Switching Strategy as restrictive condition, according to optimal control theory draw unique, drop into minimum switching combination, (this N branch road Capacitor banks can be wait capacity capacitor group to control N number of branch road Capacitor banks, also can be do not wait capacity capacitor group), and the optimal selection of engagement process with SVG instruction, realize the electrodeless compensation of capacitor switching optimum, both engagement process optimums.Static reacance generator SVG is because fast response time compensate for the reactive power of net survey prior to TSC, when after TSC in throwing, static reacance generator SVG reduces compensation capacity, reach net and survey the power factor being greater than 0.98, will avoid like this mending and owe to mend phenomenon, alleviate the output capacity of SVG and the switching frequency of TSC simultaneously.
2, transformer reactive power current compensation controls
When examining the power factor of user, normally examine the power factor value of transformer primary side, i.e. meritorious the and capacity of idle power of transformer consumption also participates in the calculating of power factor.Influential to transformer primary side power factor is the load factor of transformer and the power factor of load.Load factor is lower, larger on a power factor impact, otherwise less, and load factor determined by productive power situation, so be real-time change.Usual load power factor can compensate with general compensation arrangement, but general compensation arrangement does not have the reactive loss of compensator transformer.The reactive loss of transformer is the same with active loss, is also made up of iron loss and copper loss.The namely loss that causes of no-load loss and load current in fact.No-load loss is fixing, but the loss that load current causes affects by load factor when being, be real-time change, the present invention realizes the optimization of SVG and TSC Hybrid mode by real-time checking network side current instantaneous value, simultaneously the reactive loss of real-Time Compensation transformer.
The reactive loss computing formula of transformer:
ΔQ = Q 0 + Q F = ( I 0 % S 0 100 ) 2 _ P 2 + P 2 + Q 2 U 2 X B
For achieving the above object, compensation arrangement of the present invention comprises static reacance generator SVG, thyristor control switched capacitor TSC and controller, controller comprises sampling and relay board, control board, IGBT drive plate, thyristor driver plate, sampling and relay board are surveyed electric current to net and are gathered and the current information of collection is fed back to control board, according to Switching Strategy and optimal control theory, control board show that switching combines, and adjust the output order of static reacance generator SVG before and after thyristor control switched capacitor TSC switching in real time; Send control information to IGBT drive plate and thyristor driver plate, IGBT drive plate is used for the control of static reacance generator SVG, and thyristor driver plate is used for the control of thyristor control switched capacitor TSC.
We can calculate the transformer reactive loss of real-time change by the current on line side detecting real-time change, carry out real-Time Compensation, to meet the power factor command of user's reality.
Compensation process:
Step one, the parameter of transformer is set according to the nameplate of custom system transformer;
Step 2, basis detect that the instantaneous value i of electric current surveyed by net na, i nb, i nc, calculate the reactive loss of transformer;
Step 3, the instruction of superposition transformer reactive power current compensation, in the instruction of static reacance generator SVG compensating load reactive current, export the drive singal of IGBT.
Be described in detail of the present invention below in conjunction with drawings and Examples.
Suppose there is N number of branch road Capacitor banks (can control at most 12 capacitor branches), concrete Hybrid mode step is as follows:
Step one, detection of grid current instantaneous value i na, i nb, i nc, line voltage instantaneous value u a, u b, u c, static reacance generator SVG output current instantaneous value i a, i b, i cand the DC bus-bar voltage instantaneous value u of static reacance generator SVG dc.
Step 2, according to the instantaneous value i of power network current detected na, i nb, i nc, the instantaneous value i of static reacance generator SVG output current a, i b, i cand line voltage instantaneous value u a, u b, u c, controller application Instantaneous Power Theory calculates the instruction i of static reacance generator SVG * f; Calculate about the parameter of transformer, the instantaneous value of power network current the transformer reactive loss i needing to compensate according to what arrange with Time Controller * t, obtain the instruction i of final static reacance generator *, obtain PWM according to SPWM mode, work to IGBT drive plate control IGBT.
Step 3, while carrying out step 2, according to the optimum Switching Strategy that optimal control theory determines, obtain the optimum switching combination of N group capacitor, thyristor driver plate sends K 1k 2k ncontrol signal, simultaneously capacitor board can the fault of sensing capacitor group, and Real-time Feedback, to controller, realizes the real-time control of Capacitor banks.
Step 4, adjust the output order of SVG before and after TSC switching in real time according to optimal control theory, what realize controlling is nonpolarity.
The state equation of optimal control of the present invention and given initial state:
x(t)＝f(x(t),u(t),t),x(t 0)＝t 0
U (t) is input: the size of net side reactive power;
X (t) is for exporting: the reactive power of mixing complete machine;
X (t 0) reactive power that exports for previous moment mixing complete machine.
The object set of regulation:
M{x(t f):x(t f)∈R n,g 1(x(t f),t f)＝0,g 1(x(t f),t f)≤0}
R nfor the capacity that total circuitry number of electric capacity is corresponding;
G 1for the capacity of complete machine;
Control strategy: 1, switching capacitance circuitry number is minimum;
2, SVG first compensates;
3, electrodeless compensation;
According to these restrictive conditions above, make target function
J [ u ( . ) ] = S ( x ( t f ) , t f ) + ∫ 0 t f L ( x ( t ) , u ( t ) , t ) dt - - - ( 4 ) For minimum;
Wherein J [u (.)] represents net side reactive power; S (x (t f), t f) represent the reactive power of load;
table is SVG reactive power;
Function is solved, is designated as u *t (), claims u *t () is optimal control.Also namely optimum switching combination (comprise SVG, organize electric capacity more).

Claims (4)

1. there is an Intelligent Dynamic reactive-load compensation method for transformer reactive current real-Time Compensation function, it is characterized in that: comprise the following steps:
1] current on line side parameter, the current instantaneous value of static reacance generator SVG output, the DC bus-bar voltage instantaneous value of static reacance generator SVG are gathered,
2] according to the current instantaneous value computational load offset current iF* instruction that current on line side parameter and static reacance generator SVG export;
Not only 3] according to current on line side parameter and transformer parameter calculating transformer reactive power compensation current i T* instruction, transformer reactive compensation current i T* instruction comprises the compensation of unloaded reactive loss but also comprises the reactive power compensation changed with load factor transformer;
4] idle for transformer supplemental current iT* instruction is added in load-compensating current iF* instruction, obtains final offset current I* instruction;
5] according to final offset current I* instruction, the control information of static reacance generator SVG is exported;
Simultaneously according to final offset current I* instruction, calculate the minimum capacity group quantity that TSC needs to drop into, utilize optimal control theory, select optimum switching combination, export TSC control signal;
6] adjust the output order I* of SVG before and after TSC switching in real time, realize the nonpolarity of control.
2. the Intelligent Dynamic reactive-load compensation method having transformer reactive current real-Time Compensation function according to claim 1, is characterized in that:
State equation (1) and the given initial state (2) of optimal control theory are:
x(t)＝f(x(t)，u(t)，t)， (1)
x(t 0)＝t 0(2)
U (t) is input: the size of t net side reactive power;
X (t) is for exporting: the reactive power of t SVG and TSC;
X (t 0) reactive power that exports for previous moment SVG and TSC;
The object set (3) of regulation is:
M{x(t f):x(t f)∈R n,g 1(x(t f),t f)＝0,g 1(x(t f),t f)≤0} (3)
R nfor the capacity that total circuitry number of electric capacity is corresponding;
G 1for the capacity of complete machine;
X (t f) be t fmoment needs the capacity dropped into;
The control strategy demand fulfillment switching capacitance circuitry number of optimal control theory is minimum, SVG first compensates, the condition of electrodeless compensation, according to these restrictive conditions, makes target function (4)
J [ u ( . ) ] = S ( x ( t f ) , t f ) + ∫ 0 t f L ( x ( t ) , u ( t ) , t ) dt - - - ( 4 ) For minimum;
Wherein J [u (.)] represents net side reactive power; S (x (t f), t f) represent the reactive power of load;
∫ 0 t f L ( x ( t ) , u ( t ) , t ) dt Table is SVG reactive power;
This function is solved, is designated as u *t (), claims u *t () is optimal control, also namely optimum switching combination.
3. there is an Intelligent dynamic reactive power compensation device for transformer reactive current real-Time Compensation function, it is characterized in that:
Comprise static reacance generator SVG, thyristor control switched capacitor TSC and controller,
Described controller comprises sampling and relay board, control board, IGBT drive plate, thyristor driver plate,
Described sampling and relay board are surveyed electric current to net and are gathered and the current information of collection is fed back to control board,
According to Switching Strategy and optimal control theory, described control board show that switching combines, and adjust the output order of static reacance generator SVG before and after thyristor control switched capacitor TSC switching in real time; Send control information to IGBT drive plate and thyristor driver plate,
Described IGBT drive plate is used for the control of static reacance generator SVG, and described thyristor driver plate is used for the control of thyristor control switched capacitor TSC.
4. the Intelligent dynamic reactive power compensation device having transformer reactive current real-Time Compensation function according to claim 1, is characterized in that:
Described Intelligent dynamic reactive power compensation device also comprises touch-screen, and the situation that the output current to reactive power compensator of described touch-screen, net are surveyed is monitored in real time, and the state of display complete machine, fault reports.
CN201410828943.3A 2014-12-26 2014-12-26 Reactive-load compensation method and device with transformer reactive current real-Time Compensation function Active CN104538975B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410828943.3A CN104538975B (en) 2014-12-26 2014-12-26 Reactive-load compensation method and device with transformer reactive current real-Time Compensation function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410828943.3A CN104538975B (en) 2014-12-26 2014-12-26 Reactive-load compensation method and device with transformer reactive current real-Time Compensation function

Publications (2)

Publication Number Publication Date
CN104538975A true CN104538975A (en) 2015-04-22
CN104538975B CN104538975B (en) 2017-06-27

Family

ID=52854467

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410828943.3A Active CN104538975B (en) 2014-12-26 2014-12-26 Reactive-load compensation method and device with transformer reactive current real-Time Compensation function

Country Status (1)

Country Link
CN (1) CN104538975B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104810839A (en) * 2015-05-15 2015-07-29 成都麦隆电气有限公司 Reactive power compensation method for transformer
CN104917186A (en) * 2015-06-16 2015-09-16 傅辉明 Decoupling coordination method for realizing optimal target control based on voltage reactive decoupling criteria
CN104953601A (en) * 2015-07-17 2015-09-30 西安爱科赛博电气股份有限公司 Reactive compensation circuit, system and method for three-phase network
CN106786635A (en) * 2015-11-19 2017-05-31 中国石油化工股份有限公司 A kind of operation/cutting method of reactive-load compensator
CN107390072A (en) * 2017-08-25 2017-11-24 上海蓝瑞电气有限公司 SVG ageing testing methods and its device
CN112769144A (en) * 2020-12-30 2021-05-07 西安西驰电气股份有限公司 SVG and capacitor-based power grid hybrid compensation device and method
CN112769145A (en) * 2020-12-30 2021-05-07 西安西驰电气股份有限公司 SVG-capacitor coordination hybrid compensation control system and control method
CN113364004A (en) * 2021-06-29 2021-09-07 浙江南德电力设备制造有限公司 Control method and device for low-voltage hybrid dynamic reactive power compensation
CN113521450A (en) * 2021-07-14 2021-10-22 巨翊科技（上海）有限公司 Method for automatically detecting no-load current and correcting current alarm threshold

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047097A (en) * 1976-04-15 1977-09-06 Westinghouse Electric Corporation Apparatus and method for transient free energization and deenergization of static VAR generators
CN201197078Y (en) * 2007-11-29 2009-02-18 大连理工大学 Mixing type static idle work generator
CN101741093A (en) * 2010-03-11 2010-06-16 哈尔滨工业大学 Reactive power compensation and harmonic governance system and control method for realizing power compensation and harmonic governance by using the same
CN102684203A (en) * 2012-04-24 2012-09-19 安徽华祝电气技术有限公司 Method for carrying out intelligent control on dynamic reactive power compensation of SVG (TSC) (static var generator (thyristor switched capacitor))

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047097A (en) * 1976-04-15 1977-09-06 Westinghouse Electric Corporation Apparatus and method for transient free energization and deenergization of static VAR generators
CN201197078Y (en) * 2007-11-29 2009-02-18 大连理工大学 Mixing type static idle work generator
CN101741093A (en) * 2010-03-11 2010-06-16 哈尔滨工业大学 Reactive power compensation and harmonic governance system and control method for realizing power compensation and harmonic governance by using the same
CN102684203A (en) * 2012-04-24 2012-09-19 安徽华祝电气技术有限公司 Method for carrying out intelligent control on dynamic reactive power compensation of SVG (TSC) (static var generator (thyristor switched capacitor))

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104810839A (en) * 2015-05-15 2015-07-29 成都麦隆电气有限公司 Reactive power compensation method for transformer
CN104917186A (en) * 2015-06-16 2015-09-16 傅辉明 Decoupling coordination method for realizing optimal target control based on voltage reactive decoupling criteria
CN104953601A (en) * 2015-07-17 2015-09-30 西安爱科赛博电气股份有限公司 Reactive compensation circuit, system and method for three-phase network
CN106786635A (en) * 2015-11-19 2017-05-31 中国石油化工股份有限公司 A kind of operation/cutting method of reactive-load compensator
CN106786635B (en) * 2015-11-19 2019-04-12 中国石油化工股份有限公司 A kind of operation/cutting method of reactive-load compensator
CN107390072A (en) * 2017-08-25 2017-11-24 上海蓝瑞电气有限公司 SVG ageing testing methods and its device
CN107390072B (en) * 2017-08-25 2019-12-24 上海蓝瑞电气有限公司 SVG aging test method and device
CN112769144A (en) * 2020-12-30 2021-05-07 西安西驰电气股份有限公司 SVG and capacitor-based power grid hybrid compensation device and method
CN112769145A (en) * 2020-12-30 2021-05-07 西安西驰电气股份有限公司 SVG-capacitor coordination hybrid compensation control system and control method
CN113364004A (en) * 2021-06-29 2021-09-07 浙江南德电力设备制造有限公司 Control method and device for low-voltage hybrid dynamic reactive power compensation
CN113364004B (en) * 2021-06-29 2022-01-25 浙江南德电力设备制造有限公司 Control method and device for low-voltage hybrid dynamic reactive power compensation
CN113521450A (en) * 2021-07-14 2021-10-22 巨翊科技（上海）有限公司 Method for automatically detecting no-load current and correcting current alarm threshold

Also Published As

Publication number Publication date
CN104538975B (en) 2017-06-27

Similar Documents

Publication Publication Date Title
CN104538975A (en) Reactive compensation method and device having transformer reactive current real-time compensation function
CN1933274B (en) H bridge cascade active electric filter DC side capacitance-voltage equalizing controlling method
CN100561825C (en) Distribution static synchronous compensator positive and negative order double ring stacking control method based on the instantaneous power balance
CN103852663A (en) Energy feedback type distributed photovoltaic power inverter integrated test system
CN103956734A (en) Multi-target electric energy quality comprehensive control and optimization device
CN102386622B (en) Fully active harmonic control device combining full compensation and fractionated compensation of plurality of machines
CN104201680A (en) Integral power quality regulator and control method
CN106961105A (en) A kind of power quality controlling device
CN103972894A (en) Control method and system for power electronic transformer
CN107834568A (en) Dynamic compensation method and dynamic compensation generating means
CN102916434B (en) Optimal configuration and control method for reactive compensation of photovoltaic power station on basis of reactive power consumption
CN107104438A (en) Applied to full control intelligent quality of power supply apparatus for correcting off the net and antidote
CN207459737U (en) A kind of three-phase imbalance self-checking device
CN101409450A (en) Static state synchronization reactive compensator connected through capacitance impedance and control method (thereof)
CN103117553A (en) Novel power quality regulator on background of micro-grid
CN104362759B (en) Final power quality regulating and controlling device for power distribution network and regulating and controlling method
CN105429179A (en) Special filtering energy feedback apparatus and control method for pumping unit
CN104022509A (en) Multifunctional electric energy quality regulator for quickly and accurately detecting instruction signals
CN109861284B (en) Line impedance correction device of new forms of energy microgrid
CN205141694U (en) Circuit is administered to alternate disequilibrium of three -phase grid
CN206650435U (en) Hybrid reactive power compensation device
CN201656480U (en) Active filter and reactive power compensation device
CN206640315U (en) A kind of static reacance generator
CN205319713U (en) Distribution transformer unbalanced three phase monitors treatment system
CN108808695A (en) A kind of three phase static reactive compensation system and its control method

Legal Events

Date Code Title Description
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant