CN107492891A - Movable-type intelligent ring device and its application method - Google Patents
Movable-type intelligent ring device and its application method Download PDFInfo
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- CN107492891A CN107492891A CN201710744734.4A CN201710744734A CN107492891A CN 107492891 A CN107492891 A CN 107492891A CN 201710744734 A CN201710744734 A CN 201710744734A CN 107492891 A CN107492891 A CN 107492891A
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- knife
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- inlet wire
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- network inlet
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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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
Abstract
The present invention relates to movable-type intelligent ring device,Between power network inlet wire 1 and power network inlet wire 2,Including phase shifiting device,Disconnect switch CB,First every knife DS1,Second every knife DS2 and the 3rd every knife DS3,Phase shifiting device and disconnect switch CB are serially connected,One end connection disconnect switch CB of phase shifiting device one end,The other end of phase shifiting device draws the first binding post,The disconnect switch CB other end draws the second binding post,One end connection distribution main website of power network inlet wire 1,The other end connects the first binding post and second every knife DS2 one end respectively,Second every knife DS2 other end connection load and first every knife DS1,Power network inlet wire 2 connects distribution main website,The other end connects the second binding post and the 3rd every knife DS3 one end respectively,3rd every knife DS3 other end connection load and first every knife DS1,Second can separate connection by first between knife DS3 every knife DS2 and the 3rd every knife DS1.
Description
Technical field
The present invention relates to operation of power networks technical field, more particularly to movable-type intelligent ring device and its application method.
Background technology
With raising of the development and society of power network to power supply reliability requirement, distribution net work structure more sophisticated, dual power supply
The situation of power supply even multiple feed is more and more, and power sensitive user gradually increases, therefore real by cyclization, Open Loop Operation
The load that do not have a power failure down now turns into a kind of inexorable trend.Its largest benefit is exactly that can reduce the frequency of power cut of user, is greatly improved
The reliability of power supply, the public is improved to the satisfaction of powering.However, when performing Loop Closing Operation, the presence of both sides pressure difference angular difference,
Larger impact is had during cyclization, circulating current (electric current for flowing through cyclization switch) can be produced in network, this will be directly influenced
The safe and stable operation of power network.
At present, China 110kV and above power network substantially completely realize uninterrupted operation.Early stage planning transformer station,
The estimated deficiency of development to electric network composition, the even lower 10kV power networks of 35kV do not have the cyclization for designing and possessing synchronized detection function
Function, when needing Electromagnetic coupling, because voltage difference, differential seat angle are excessive, typically all cause frequently to stop using cold borne forms
Electric operation so that customer power supply reliability substantially reduces, and has a strong impact on the social image of power department.In addition, economic society is sent out
Exhibition, height jeopardize that responsible consumer is more and more, and electric company needs to provide substantial amounts of power off notifying book, causes manpower and materials to waste.
In no installing section switch or the larger occasion of pressure difference angular difference, at present can only it is cold lead load by way of
To realize that load shifts, inevitably have a power failure, influence power supply quality.With the development of power network and the increasing of sensitive users
More, cold load method is gradually unable to meet demand.
The country realizes Loop Closing Operation using following method at present：
1st, power failure cyclization：
Means the most frequently used at present are will to disconnect (first draw and close afterwards) by the power supply of cyclization side before cyclization, in cyclization not
In the presence of the interconnection of two different electrical powers.Advantage is that cyclization is safe and reliable, will not form electromagnetic looped network.Shortcoming is need to be to falling electric scope
Interior user has a power failure in short-term.It so on the one hand have impact on the power supply reliability of power network；On the other hand user is caused to having a power failure in short-term
It is discontented, compromise the social influence of company；Electrically operated preceding power failure is coordinated and notifies work every time simultaneously, wastes big
The manpower and materials of amount.
2nd, the same direct cyclization of voltage class breaker：
To having accessed the dual power supply in same voltage class source or having realized the transformer station powered hand in hand, under normal circumstances
By the way of closed loop configuration open loop operation., it is necessary to meet each condition of cyclization during cyclization, as cyclization point phase is consistent, pressure
Within the specific limits, and whether element overloads after verifying cyclization, the bars such as relay protection action will not act for difference and phase angle difference
Part.
3rd, the direct electromagnetism cyclization of different voltage grade：
In different voltage grade occasion, it is frequently present of phase angle difference and leads to not direct cyclization, in the cyclization that must not have a power failure
In the case of, it is necessary to calculated in detail according to electromagnetism cyclization is theoretical, serious analysis, research cyclization feasibility, meet electromagnetism cyclization skill
After art and regulatory requirements, the distribution line electromagnetism cyclization " falling electric " that can in a planned way carry out different voltage grade is tested.This behaviour
It is time-consuming long to make mode, difficulty is big, and risk is big, belongs to special operational in particular cases.
In the other cases, for example the situation of breaker is configured without, cyclization can only be realized by the way of having a power failure,
Or the substantial amounts of funds of input and time, the Transfomer Substation Reconstruction of cyclization condition will not be met, time length, input is high, economic benefit
It is low, therefore reliable movable-type intelligent ring device is developed, the complete cyclization that do not have a power failure is realized, there is urgent realistic meaning.
The content of the invention
In view of this, it is necessary to which a kind of movable-type intelligent ring device and its application method are provided.
The present invention is achieved in that movable-type intelligent ring device, between power network inlet wire 1 and power network inlet wire 2,
Including phase shifiting device, disconnect switch CB, first every knife DS1, second every knife DS2 and the 3rd every knife DS3, the phase shifiting device and disconnected
Way switch CB is serially connected, and is concentrated in a container or switch board, forms an overall structure, the phase shifiting device
One end connection disconnect switch CB one end, the other end of phase shifiting device draws the first binding post, and disconnect switch CB's is another
The second binding post, one end connection distribution main website of the power network inlet wire 1 are drawn in end, and the other end connects the first binding post respectively
Connect with second every knife DS2 one end, second every knife DS2 other end connection load and first every knife DS1, the power network inlet wire 2
Meet distribution main website, the other end connects the second binding post and the 3rd every knife DS3 one end respectively, the 3rd every knife DS3 the other end
Every knife DS1, described second can be every every knife DS1 by described first between knife DS3 every knife DS2 and the 3rd for connection load and first
Connection breaking.
Further, the phase shifiting device is phase-shifting transformer or THE UPFC.
Further, described second every knife DS2 and the 3rd every knife DS3 for can grounding switch.
Further, phase shifiting device and the disconnect switch CB concentrates container or the switch board at place to be independent,
It is detachably connected between power network inlet wire 1 and power network inlet wire 2.
Present invention also offers the application method of above-mentioned movable-type intelligent ring device, specifically used method are as follows：
Assuming that current second is in closure state every knife DS2 and the 3rd every knife DS3, first disconnects, it is necessary to electricity every knife DS1
Net inlet wire 2, the load of power network inlet wire 2 need to go to power network inlet wire 1, and first every knife DS1, second every knife DS2 and the 3rd every knife
DS3 is every knife, and phase angle difference be present between power network inlet wire 1 and power network inlet wire 2, it is impossible to direct cyclization；
Now, the phase angle at disconnect switch CB both ends is adjusted within 20 degree using phase shifiting device regulation stall first, broken
The automatic synchronizing closes of way switch CB, after combined floodgate, the higher level of power network inlet wire 2 switch can disconnect, and institute's on-load goes to power network inlet wire
1, then phase shifiting device, which is transferred the files, returns to 0 grade, does not do phase shift, and now first is substantially equipotential every knife DS1 both ends, can directly be closed
First is closed every knife DS1, then separately the 3rd every knife DS3, disconnect switch CB is disconnected, exits mobile ring device；
During recovery, reverse operation puts into mobile ring device, and closure disconnect switch CB and the 3rd disconnects the every knife DS3
One every knife DS1, and regulation phase shifiting device gear returns former record gear, then closes the higher level's switch of power network inlet wire 2, then disconnect open circuit and open
CB is closed, the gear for adjusting phase shifiting device returns 0, exits ring device.
The advantages of movable-type intelligent ring device provided by the invention and its application method, is：Present invention conjunction simple in construction
Reason, in no installing section switch or the larger occasion of pressure difference angular difference, at present can only it is cold lead load by way of carry out reality
Existing load transfer, inevitably has a power failure, influences power supply quality.With the development of power network and increasing for sensitive users,
Cold load method is gradually unable to meet demand.After movable-type intelligent ring device is succeeded in developing, to transformer station's power supply unit
Overhauled and safeguarded and worked with line maintenance, dispatching of power netwoks department when transport zone supply load carries out " fall electricity " work,
It can effectively avoid having a power failure and influence user's normal power supply, it is horizontal to improving power supply department good service, power supply reliability is improved, is had
Particularly significant meaning, there is following technology and economic implications：
(1) big pressure difference and the Electromagnetic coupling of big angular difference supply line are realized.
With expanding economy, electric network composition tends to be complicated, and same station, such as 35kV may have from different voltages etc.
The inlet wire of level different substation.Due to the influence of transformer connection group, it is more likely that occur that two 35kV have phase and angle
Degree is poor.If the direct cyclizations of the two 35kV, electromagnetic looped network will be formed, can produce circulating current in network (flows through cyclization to hold
The electric current of pass), this will directly influence the safe and stable operation of power network.Movable-type intelligent ring device carries phase adjusted work(
Can, two different source voltage phase differences and pressure difference regulation can be arrived in suitable scope, in the quasi- same period for realizing microvariations
Cyclization, substantially reduce influence of the electromagnetic looped network to grid stability.
(2) the efficiently old transformer station cyclization ability transformation of low input
Part transformer station is in design, it is contemplated that the method for operation, cost of investment, does not set enough segmentation open circuits
Device；As the situation from different voltage class transformer stations introduction interconnection also occurs in dilatation.Therefore exist when needing cyclization
Can not be had a power failure cyclization, in addition angular difference greatly can not cyclization the problem of.If by transformer station in a conventional manner all transformation, it is necessary to
Block switch cabinet is set up in each position, or even sets up phase shifiting device and adjusts excessive angular difference.In view of the transformer station for needing to transform
Quantity is more, and the cost of transformation and time are all long.And after using intelligent ring device, each transformer station only needs to do once
Simple transformation, increase mobile ring device interface, it is not necessary to install section switch, synchronous device and phase shifiting device；
Packaged type is designed as using ring device, so in same electricity consumption region, 1 or several movements can configured as needed
Device.Invest on the whole it is small, transformation the time it is short, high financial profit.
Brief description of the drawings
Fig. 1 is the structural representation of movable-type intelligent ring device of the present invention；
Fig. 2 is the schematic diagram of the phase-shifting transformer in movable-type intelligent ring device of the present invention；
Fig. 3 is the voltage-regulation mode figure of the phase-shifting transformer in movable-type intelligent ring device of the present invention；
Fig. 4 is the schematic diagram of the THE UPFC in movable-type intelligent ring device of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 1, Fig. 1 is the structural representation of movable-type intelligent ring device of the present invention.
By taking 35kv distributions as an example, movable-type intelligent ring device, installed in 35kv power networks inlet wire 1 and 35kv power networks inlet wire 2
Between, including phase shifiting device a, disconnect switch CB, first set every knife DS1, second every knife DS2 and the 3rd every knife DS3, the phase shift
Standby a and disconnect switch CB is serially connected, and is concentrated in a container or switch board, forms an overall structure, described
Phase shifiting device a one end connection disconnect switch CB one end, the phase shifiting device a other end draw the first binding post b, and open circuit is opened
The other end for closing CB draws the second binding post c, one end connection distribution main website of the power network inlet wire 1, and the other end connects respectively
First binding post b and second every knife DS2 one end, second every knife DS2 other end connection load and first every knife DS1, institute
State power network inlet wire 2 and connect distribution main website, the other end connects the second binding post c and the 3rd every knife DS3 one end respectively, the 3rd every
Every knife DS1, described second passes through described the every knife DS2 and the 3rd between knife DS3 for knife DS3 other end connection load and first
One can separate connection every knife DS1.
Described second every knife DS2 and the 3rd every knife DS3 for can grounding switch, in order to give connecting cable electric discharge, protect
Demonstrate,prove safe operation.
It is independent that the phase shifiting device a and disconnect switch CB, which concentrate container or the switch board at place, is entered with power network
It is detachably connected between line 1 and power network inlet wire 2, it is easy to disassemble and mobile.
The phase shifiting device a is phase-shifting transformer or THE UPFC.
Fig. 2 and Fig. 3 are referred to, wherein Fig. 2 is the principle of the phase-shifting transformer in movable-type intelligent ring device of the present invention
Figure；Fig. 3 is the voltage-regulation mode figure of the phase-shifting transformer in movable-type intelligent ring device of the present invention.
Phase shifter is installed in series in the line, exports an offset voltage in circuit mount point, can adjust mount point
Voltage magnitude or phase angle.
Wherein, VS is voltage before phase shift；VL is the line voltage distribution after phase shift；For voltage phase angle before phase shift；To move
The phase shifting angle of phase transformer.
The offset voltage of phase-shifting transformer output mainly has 3 kinds of compensation ways, respectively longitudinally adjust, lateral adjustments, tiltedly
To regulation.
The output voltage of longitudinal compensation differs ± 180 ° with line voltage distribution in phase, only changes the voltage amplitude of transmission line of electricity
Value.
The output voltage laterally compensated differs ± 90 ° with line voltage distribution in phase, changes the voltage magnitude of transmission line of electricity
And phase angle.
Oblique regulation is two kinds of regulative modes of summary, and the offset voltage of output and the phase angle of line voltage distribution are adjustable, can
To change the amplitude of line voltage distribution or phase angle.
Because phase-shifting transformer can be with the amplitude and phase angle of adjusting circuit voltage, main function has in grid：
The trend of adjusting circuit, adjusting circuit voltage, balancing loop trend etc..
Typical phase-shifting transformer is twin-core asymmetry structure, and its offset voltage is oblique regulation, can adjust line simultaneously
The phase angle and amplitude of road voltage.
Referring to Fig. 4, Fig. 4 is the schematic diagram of the THE UPFC in movable-type intelligent ring device of the present invention.
THE UPFC (UPFC) possesses while carries out the ability of series connection and dynamic compesated control in parallel, it is considered to be
The most powerful FACTS equipment of function, and third generation FACTS representative.UPFC can be integrated and be solved the circuit tide that power network faces
The problems such as flow distribution is uneven, voltage dynamic support scarce capacity, before having wide application in the construction of China's intelligent grid
Scape.
UPFC devices can be regarded as to be formed by the DC side parallel of STATCOM device and SSSC devices.Based on current transformer
Parallel connection type compensator, such as STATCOM device, it can effectively produce reactive current, compensation system reactive power, maintain section
The voltage of point, but it is weaker to the voltage compensation ability of circuit；And the series compensation device based on current transformer, such as SSSC devices,
It can effectively compensate for the voltage of transmission line of electricity, the trend of control circuit, but it is not strong to the compensation ability of reactive current.By two
Individual device integrates, and just constitutes UPFC devices.It both has very strong compensated line voltage capability, there is very strong compensation again
The ability of reactive power.But also with being absorbed in four quadrants, sending active power, it can also absorb and send reactive power
Effect, have very strong control circuit trend ability.
The function that the part in series on right side is mainly realized has：Offset voltage c size and phase angle is controlled, equivalent to controllable
Synchronous voltage source；The function of parallel connection part is：There is provided or absorb active power, providing energy for part in series supports and carry out
Reactive-load compensation.Therefore, UPFC has various control function：Voltage-regulation, series compensation, phase angle regulation, multi-functional power flowcontrol, this
It also illustrate that UPFC has very strong flexibility.It can be realized without differential regulation voltage swing and phase using part in series
Purpose.
Present invention also offers the application method of movable-type intelligent ring device, is specially：
Assuming that current second is in closure state every knife DS2 and the 3rd every knife DS3, first disconnects, it is necessary to electricity every knife DS1
Net inlet wire 2, the load of power network inlet wire 2 need to go to power network inlet wire 1, and first every knife DS1, second every knife DS2 and the 3rd every knife
DS3 is every knife, and phase angle difference be present between power network inlet wire 1 and power network inlet wire 2, it is impossible to direct cyclization；
Now, the phase angle at disconnect switch CB both ends is adjusted within 20 degree using phase shifiting device a regulation stalls first,
The automatic synchronizing closes of disconnect switch CB, after combined floodgate, the higher level of power network inlet wire 2 switch can disconnect, and institute's on-load goes to power network and entered
Line 1, then phase shifiting device a, which transfers the files, returns to 0 grade, does not do phase shift, now first every knife DS1 both ends be substantially equipotential, Neng Gouzhi
Closure first is connect every knife DS1, then separately the 3rd every knife DS3, disconnect switch CB is disconnected, exits mobile ring device；
During recovery, reverse operation puts into mobile ring device, and closure disconnect switch CB and the 3rd disconnects the every knife DS3
One every knife DS1, and regulation phase shifiting device gear returns former record gear, then closes the higher level's switch of power network inlet wire 2, then disconnect open circuit and open
CB is closed, regulation phase shifiting device a gear returns 0, exits ring device.
The advantages of movable-type intelligent ring device provided by the invention and its application method, is：Present invention conjunction simple in construction
Reason, in no installing section switch or the larger occasion of pressure difference angular difference, at present can only it is cold lead load by way of carry out reality
Existing load transfer, inevitably has a power failure, influences power supply quality.With the development of power network and increasing for sensitive users,
Cold load method is gradually unable to meet demand.After movable-type intelligent ring device is succeeded in developing, to transformer station's power supply unit
Overhauled and safeguarded and worked with line maintenance, dispatching of power netwoks department when transport zone supply load carries out " fall electricity " work,
It can effectively avoid having a power failure and influence user's normal power supply, it is horizontal to improving power supply department good service, power supply reliability is improved, is had
Particularly significant meaning, there is following technology and economic implications：
(1) big pressure difference and the Electromagnetic coupling of big angular difference supply line are realized.
With expanding economy, electric network composition tends to be complicated, and same station, such as 35kV may have from different voltages etc.
The inlet wire of level different substation.Due to the influence of transformer connection group, it is more likely that occur that two 35kV have phase and angle
Degree is poor.If the direct cyclizations of the two 35kV, electromagnetic looped network will be formed, can produce circulating current in network (flows through cyclization to hold
The electric current of pass), this will directly influence the safe and stable operation of power network.Movable-type intelligent ring device carries phase adjusted work(
Can, two different source voltage phase differences and pressure difference regulation can be arrived in suitable scope, in the quasi- same period for realizing microvariations
Cyclization, substantially reduce influence of the electromagnetic looped network to grid stability.
(2) the efficiently old transformer station cyclization ability transformation of low input
Part transformer station is in design, it is contemplated that the method for operation, cost of investment, does not set enough segmentation open circuits
Device；As the situation from different voltage class transformer stations introduction interconnection also occurs in dilatation.Therefore exist when needing cyclization
Can not be had a power failure cyclization, in addition angular difference greatly can not cyclization the problem of.If by transformer station in a conventional manner all transformation, it is necessary to
Block switch cabinet is set up in each position, or even sets up phase shifiting device and adjusts excessive angular difference.In view of the transformer station for needing to transform
Quantity is more, and the cost of transformation and time are all long.And after using intelligent ring device, each transformer station only needs to do once
Simple transformation, increase mobile ring device interface, it is not necessary to install section switch, synchronous device and phase shifiting device；
Packaged type is designed as using ring device, so in same electricity consumption region, 1 or several movements can configured as needed
Device.Invest on the whole it is small, transformation the time it is short, high financial profit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (5)
1. movable-type intelligent ring device, between power network inlet wire 1 and power network inlet wire 2, it is characterised in that set including phase shift
Standby (a), disconnect switch CB, first open every knife DS1, second every knife DS2 and the 3rd every knife DS3, the phase shifiting device (a) and open circuit
Close CB to be serially connected, and concentrate in a container or switch board, form an overall structure, the phase shifiting device (a)
One end connection disconnect switch CB one end, the other end of phase shifiting device (a) draws the first binding post (b), disconnect switch CB
The other end draw the second binding post (c), one end connection distribution main website of the power network inlet wire 1, the other end connects the respectively
One binding post (b) and second every knife DS2 one end, second every knife DS2 other end connection load and first every knife DS1, institute
To state power network inlet wire 2 and connect distribution main website, the other end connects the second binding post (c) and the 3rd every knife DS3 one end respectively, and the 3rd
Every knife DS3 other end connection load and first every knife DS1, described second every knife DS2 and the 3rd between knife DS3 by described
First can separate connection every knife DS1.
2. movable-type intelligent ring device according to claim 1, it is characterised in that the phase shifiting device (a) is phase shift
Transformer or THE UPFC.
3. movable-type intelligent ring device according to claim 1, it is characterised in that described second every knife DS2 and the 3rd
Being every knife DS3 can grounding switch.
4. movable-type intelligent ring device according to claim 1, it is characterised in that the phase shifiting device (a) and open circuit
The container where CB is concentrated or switch board are switched independently, detachably to connect between power network inlet wire 1 and power network inlet wire 2
Connect.
5. the movable-type intelligent ring device according to Claims 1 to 4 any one, it is characterised in that its application method
For：
Assuming that current second is in closure state every knife DS2 and the 3rd every knife DS3, first disconnects, it is necessary to which power network enters every knife DS1
Line 2, the load of power network inlet wire 2 need to go to power network inlet wire 1, and first every knife DS1, second every knife DS2 and the 3rd every knife DS3 all
It is every knife, and phase angle difference is present between power network inlet wire 1 and power network inlet wire 2, it is impossible to direct cyclization；
Now, the phase angle at disconnect switch CB both ends is adjusted within 20 degree using phase shifiting device (a) regulation stall first, broken
The automatic synchronizing closes of way switch CB, after combined floodgate, the higher level of power network inlet wire 2 switch can disconnect, and institute's on-load goes to power network inlet wire
1, then phase shifiting device (a), which is transferred the files, returns to 0 grade, does not do phase shift, now first every knife DS1 both ends be substantially equipotential, Neng Gouzhi
Closure first is connect every knife DS1, then separately the 3rd every knife DS3, disconnect switch CB is disconnected, exits mobile ring device；
During recovery, reverse operation puts into mobile ring device, closure disconnect switch CB and the 3rd every knife DS3, disconnect first every
Knife DS1, regulation phase shifiting device gear return former record gear, then close the higher level's switch of power network inlet wire 2, then disconnect disconnect switch
CB, the gear of regulation phase shifiting device (a) return 0, exit ring device.
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| CN201710744734.4A CN107492891B (en) | 2017-08-25 | 2017-08-25 | Mobile intelligent ring closing device and use method thereof |
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| CN201710744734.4A CN107492891B (en) | 2017-08-25 | 2017-08-25 | Mobile intelligent ring closing device and use method thereof |
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| CN109149573A (en) * | 2018-09-26 | 2019-01-04 | 云南电网有限责任公司电力科学研究院 | A kind of intelligent power distribution ring device adjusted based on TCR |
| CN111431177A (en) * | 2020-04-20 | 2020-07-17 | 武汉大学 | Power distribution network load transfer device and method |
| CN112366714A (en) * | 2020-11-30 | 2021-02-12 | 云南电网有限责任公司电力科学研究院 | Power distribution network loop closing and power adjusting device and method for adjusting differential pressure angular difference |
| CN112803407A (en) * | 2021-03-12 | 2021-05-14 | 广东电网有限责任公司广州供电局 | Low-voltage distribution network seamless loop-closing power transfer method and system based on parallel converters |
| CN113937779A (en) * | 2021-10-12 | 2022-01-14 | 云南电网有限责任公司电力科学研究院 | Closed loop switching supply adjusting method based on phase-shifting transformer |
| CN113937887A (en) * | 2021-10-12 | 2022-01-14 | 西安热工研究院有限公司 | Phase shifter loop closing thermal inversion control method and system |
| CN114899817A (en) * | 2022-05-11 | 2022-08-12 | 江苏宏源电气有限责任公司 | Mobile distribution network closed loop system and control method thereof |
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