CN107732899B - The optimization method and device of communication channel ability to transmit electricity in AC-DC hybrid power grid - Google Patents
The optimization method and device of communication channel ability to transmit electricity in AC-DC hybrid power grid Download PDFInfo
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- CN107732899B CN107732899B CN201710862488.2A CN201710862488A CN107732899B CN 107732899 B CN107732899 B CN 107732899B CN 201710862488 A CN201710862488 A CN 201710862488A CN 107732899 B CN107732899 B CN 107732899B
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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
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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
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Abstract
The present invention provides the optimization methods and device of communication channel ability to transmit electricity in a kind of AC-DC hybrid power grid, it is equivalent that two-shipper is first carried out to sending end AC system according to the dynamic response curve of AC-DC hybrid power grid, obtain advanced electric power generator group and lag electric power generator group, then Thevenin's equivalence is carried out to AC-DC hybrid power grid from DC side according to advanced electric power generator group and lag electric power generator group, the method of operation that AC-DC hybrid power grid is finally adjusted according to the Thevenin's equivalence result of AC-DC hybrid power grid, realizes the optimization to communication channel ability to transmit electricity in direct current serial-parallel power grid；The present invention solves in certain failure excitation sending end AC systems causes DC converter busbar voltage to be fallen after electric power generator group oscillation, the transmission power of DC transmission system is caused to collapse in recovery process, the problem of impacting communication channel again, the method of operation for power grid operation personnel's reasonable arrangement AC-DC hybrid power grid provides reference, ensures the safe and stable operation of AC-DC hybrid power grid.
Description
Technical field
The present invention relates to technical field of power systems, and in particular to communication channel is transmitted electricity energy in a kind of AC-DC hybrid power grid
The optimization method and device of power.
Background technique
Currently, China's AC-DC hybrid power grid begins to take shape, due to influencing each other for DC transmission system and AC system,
So that AC-DC hybrid power grid becomes complicated, profound change is occurring for the safety and stability characteristic of AC-DC hybrid power grid, and more
The coupled characteristic returned between DC transmission system and AC system is not yet clearly recognized, defeated especially with multiple-circuit line
Electric system is intensively sent out and the feature of multiple-circuit line transmission system feed-in receiving end AC system is increasingly prominent, high-capacity direct current transmission of electricity
The dynamic characteristic of system, which has the safety and stability characteristic of AC-DC hybrid power grid, to be significantly affected.Multiple-circuit line transmission system shares
Under same sending end AC system and the status formed with receiving end AC system pattern together, it is easy to appear multiple-circuit line transmission system
The case where emergent power disturbance simultaneously is extremely serious disturbance impact for sending end AC system and receiving end AC system,
The maintenance level of AC-DC hybrid power grid and the ability to transmit electricity of related important section are tested, to China's AC-DC hybrid power grid
Safe and stable operation proposes new challenge.
DC transmission system capacity is big, and the failures impact such as commutation failure or power wink drop is big, be easy to cause alternating current-direct current mixed connection
Communication channel unstability in power grid generallys use the following two kinds pre-control mode at present and avoids AC-DC hybrid power grid unstability:
1) limiting AC channel transmission of electricity limit: the steady state stability limit of the interconnection in sending end AC system is lower, hands over to be weak
Circulation road.The method of operation arrange when, if DC transmission system transmission power it has been determined that if need pre-control weakness communication channel
Steady-state operating power, reserve enough stability margins and guarantee that AC-DC hybrid power grid being capable of safe and stable operation.
2) limit direct current transmission power: since the transmission power of current DC transmission system is very big, DC transmission system is defeated
Send the fluctuation of power that will cause very big impact to weak communication channel.When the method for operation arranges, if weak communication channel
Steady-state operating power reduces DC transmission system transmission power it has been determined that then need the transmission power of pre-control DC transmission system
Threat to AC-DC hybrid power grid safe and stable operation.
DC transmission system occurs that acutely oscillation occurs between the failures such as commutation failure may cause electric power generator group, in turn results in
Change of current busbar voltage reduces in sending end AC system, influences DC transmission system transmission power recovery characteristics, logical to weakness exchange
Road causes another Secondary Shocks, causes AC-DC hybrid power grid security margin smaller, seriously limits the transmission of electricity of communication channel
Ability.
Summary of the invention
Ability to transmit electricity in order to overcome the shortcomings of above-mentioned communication channel in the prior art is limited, and the present invention provides a kind of friendship
The optimization method and device of communication channel ability to transmit electricity in direct current serial-parallel power grid, first according to the dynamic response of AC-DC hybrid power grid
Curve carries out two-shipper equivalence to sending end AC system, obtains advanced electric power generator group and lag electric power generator group, is then sent out according to advanced
Motor group and lag electric power generator group carry out Thevenin's equivalence to AC-DC hybrid power grid from DC side, finally according to alternating current-direct current mixed connection
The method of operation of the Thevenin's equivalence result adjustment AC-DC hybrid power grid of power grid, is realized to communication channel in direct current serial-parallel power grid
The optimization of ability to transmit electricity.
In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme that:
The present invention provides a kind of optimization method of communication channel ability to transmit electricity in AC-DC hybrid power grid, comprising:
Two-shipper equivalence is carried out to sending end AC system according to the dynamic response curve of AC-DC hybrid power grid, is sent out in advance
Motor group and lag electric power generator group；
Thevenin's equivalence is carried out to AC-DC hybrid power grid from DC side according to advanced electric power generator group and lag electric power generator group；
The method of operation of AC-DC hybrid power grid is adjusted according to the Thevenin's equivalence result of AC-DC hybrid power grid.
The dynamic response curve according to AC-DC hybrid power grid carries out two-shipper equivalence to sending end AC system, is surpassed
Preceding electric power generator group and lag electric power generator group include:
Off-line simulation is carried out to the failure that DC transmission system may occur, the dynamic for obtaining AC-DC hybrid power grid is rung
Answer curve；
Two-shipper equivalence is carried out to sending end AC system according to the dynamic response curve of AC-DC hybrid power grid, is counted according to the following formula
Calculate the revolving speed and generator rotor angle of advanced electric power generator group:
Wherein, ωsIndicate the revolving speed of advanced electric power generator group, δsIndicate the generator rotor angle of advanced electric power generator group, ωiIndicate advanced hair
The revolving speed of i-th generating set, δ in motor groupiIndicate the generator rotor angle of i-th generating set in advanced electric power generator group, S indicates advanced
The total number of units of generating set in electric power generator group；MSIndicate the inertia time constant of advanced electric power generator group, andMiIt indicates
The inertia time constant of i-th generating set in advanced electric power generator group；
The revolving speed and generator rotor angle of lag electric power generator group are calculated according to the following formula:
Wherein, ωAIndicate the revolving speed of lag electric power generator group, δAIndicate the generator rotor angle of lag electric power generator group, ωjIndicate lag hair
The revolving speed of jth platform generating set, δ in motor groupjIndicate the generator rotor angle of jth platform generating set in lag electric power generator group, A indicates lag
The total number of units of generating set in electric power generator group；MAIndicate the inertia time constant of lag electric power generator group, andMjIt indicates
Lag the inertia time constant of jth platform generating set in electric power generator group.
The failure that the DC transmission system may occur includes commutation failure failure and the event of successive commutation failure simultaneously
Barrier.
The advanced electric power generator group of basis and lag electric power generator group carry out Dai Weinan to AC-DC hybrid power grid from DC side
Equivalence includes:
Thevenin's equivalence is carried out to advanced electric power generator group and lag electric power generator group respectively, obtains the Dai Wei of advanced electric power generator group
The Thevenin's equivalence result of southern equivalence result and lag electric power generator group；
According to the Thevenin's equivalence result of advanced electric power generator group and the Thevenin's equivalence result of lag electric power generator group to from straight
It flows side and Thevenin's equivalence is carried out to AC-DC hybrid power grid.
The Thevenin's equivalence result of the advanced electric power generator group of basis and the Thevenin's equivalence result pair of lag electric power generator group
Carrying out Thevenin's equivalence to AC-DC hybrid power grid from DC side includes:
The Dai Weinan equivalent potential amplitude and Dai Weinan equivalent reactance of AC-DC hybrid power grid are calculated according to the following formula:
Wherein, E indicates the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid, and X indicates wearing for AC-DC hybrid power grid
Southern equivalent reactance is tieed up, δ indicates the equivalent generator rotor angle of AC-DC hybrid power grid, E1Indicate the Dai Weinan equivalent potential of advanced electric power generator group
Amplitude, E2Indicate the Dai Weinan equivalent potential amplitude of lag electric power generator group, δ1Indicate the equivalent function of the Dai Weinan of advanced electric power generator group
Angle, δ2Indicate the equivalent generator rotor angle of Dai Weinan of lag electric power generator group, X1Indicate the Dai Weinan equivalent reactance of advanced electric power generator group, X2Table
Show the Dai Weinan equivalent reactance of lag electric power generator group.
The method of operation packet that AC-DC hybrid power grid is adjusted according to the Thevenin's equivalence result of AC-DC hybrid power grid
It includes:
If the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid is more than threshold potential, reduces and sent out in advanced electric power generator group
The power output of motor group, and increase accordingly advanced electric power generator group and lag the power output of generating set between electric power generator group.
The present invention also provides a kind of optimization devices of communication channel ability to transmit electricity in AC-DC hybrid power grid, comprising:
First equivalent module carries out sending end AC system for the dynamic response curve according to AC-DC hybrid power grid double
Machine is equivalent, obtains advanced electric power generator group and lag electric power generator group；
Second equivalent module, for electric to alternating current-direct current mixed connection from DC side according to advanced electric power generator group and lag electric power generator group
Net carries out Thevenin's equivalence；
Module is adjusted, for adjusting the fortune of AC-DC hybrid power grid according to the Thevenin's equivalence result of AC-DC hybrid power grid
Line mode.
Described first equivalent module is specifically used for:
Off-line simulation is carried out to the failure that DC transmission system may occur, the dynamic for obtaining AC-DC hybrid power grid is rung
Answer curve；
Two-shipper equivalence is carried out to sending end AC system according to the dynamic response curve of AC-DC hybrid power grid, is counted according to the following formula
Calculate the revolving speed and generator rotor angle of advanced electric power generator group:
Wherein, ωsIndicate the revolving speed of advanced electric power generator group, δsIndicate the generator rotor angle of advanced electric power generator group, ωiIndicate advanced hair
The revolving speed of i-th generating set, δ in motor groupiIndicate the generator rotor angle of i-th generating set in advanced electric power generator group, S indicates advanced
The total number of units of generating set in electric power generator group；MSIndicate the inertia time constant of advanced electric power generator group, andMiIt indicates
The inertia time constant of i-th generating set in advanced electric power generator group；
The revolving speed and generator rotor angle of lag electric power generator group are calculated according to the following formula:
Wherein, ωAIndicate the revolving speed of lag electric power generator group, δAIndicate the generator rotor angle of lag electric power generator group, ωjIndicate lag hair
The revolving speed of jth platform generating set, δ in motor groupjIndicate the generator rotor angle of jth platform generating set in lag electric power generator group, A indicates lag
The total number of units of generating set in electric power generator group；MAIndicate the inertia time constant of lag electric power generator group, andMjIt indicates
Lag the inertia time constant of jth platform generating set in electric power generator group.
The failure that the DC transmission system may occur includes commutation failure failure and the event of successive commutation failure simultaneously
Barrier.
Described second equivalent module is specifically used for:
Thevenin's equivalence is carried out to advanced electric power generator group and lag electric power generator group respectively, obtains the Dai Wei of advanced electric power generator group
The Thevenin's equivalence result of southern equivalence result and lag electric power generator group；
According to the Thevenin's equivalence result of advanced electric power generator group and the Thevenin's equivalence result of lag electric power generator group to from straight
It flows side and Thevenin's equivalence is carried out to AC-DC hybrid power grid.
Described second equivalent module is specifically used for:
The Dai Weinan equivalent potential amplitude and Dai Weinan equivalent reactance of AC-DC hybrid power grid are calculated according to the following formula:
Wherein, E indicates the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid, and X indicates wearing for AC-DC hybrid power grid
Southern equivalent reactance is tieed up, δ indicates the equivalent generator rotor angle of AC-DC hybrid power grid, E1Indicate the Dai Weinan equivalent potential of advanced electric power generator group
Amplitude, E2Indicate the Dai Weinan equivalent potential amplitude of lag electric power generator group, δ1Indicate the equivalent function of the Dai Weinan of advanced electric power generator group
Angle, δ2Indicate the equivalent generator rotor angle of Dai Weinan of lag electric power generator group, X1Indicate the Dai Weinan equivalent reactance of advanced electric power generator group, X2Table
Show the Dai Weinan equivalent reactance of lag electric power generator group.
The adjustment module is specifically used for:
If the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid is more than threshold potential, reduces and sent out in advanced electric power generator group
The power output of motor group, and increase accordingly advanced electric power generator group and lag the power output of generating set between electric power generator group.
Compared with the immediate prior art, technical solution provided by the invention is had the advantages that
In AC-DC hybrid power grid provided by the invention in the optimization method of communication channel ability to transmit electricity, first according to alternating current-direct current
The dynamic response curve of serial-parallel power grid carries out two-shipper equivalence to sending end AC system, obtains advanced electric power generator group and lag generator
Then group carries out Thevenin's equivalence to AC-DC hybrid power grid from DC side according to advanced electric power generator group and lag electric power generator group,
The method of operation that AC-DC hybrid power grid is finally adjusted according to the Thevenin's equivalence result of AC-DC hybrid power grid, is realized to direct current
The optimization of communication channel ability to transmit electricity in serial-parallel power grid；
The optimization device of communication channel ability to transmit electricity includes the first equivalent mould in AC-DC hybrid power grid provided by the invention
Block, the second equivalent module and adjustment model carry out two-shipper equivalence to sending end AC system by the first equivalent module, obtain advanced
Electric power generator group and lag electric power generator group, then Dai Weinan etc. is carried out to AC-DC hybrid power grid from DC side by the second equivalent module
Value is realized finally by the method for operation of adjustment module adjustment AC-DC hybrid power grid to communication channel in direct current serial-parallel power grid
The optimization of ability to transmit electricity；
In technical solution provided by the invention, by the Dai Weinan equivalent potential amplitude and threshold potential of AC-DC hybrid power grid
It is compared, if the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid is more than threshold potential, adjusts alternating current-direct current mixed connection electricity
The method of operation of net, specifically reduces the power output of generating set in advanced electric power generator group, and increase accordingly advanced electric power generator group with
The power output of generating set between electric power generator group is lagged, that is, carries out the booting of Wind turbines in a different group of planes in AC-DC hybrid power grid
It arranges, alleviating multiple-circuit line transmission system, the impact of the failures such as commutation failure influences simultaneously, so that generating electricity in sending end AC system
Oscillation amplitude between a group of planes is greatly lowered, and effectively improves the power recovery characteristics of extra-high voltage DC transmission system, improves
Sending end AC system security margin, greatly optimizes the ability to transmit electricity of communication channel；
Technical solution provided by the invention is solved in power grid actual motion and is sent out in certain failure excitation sending end AC systems
Cause DC converter busbar voltage to be fallen after motor group oscillation, the transmission power of DC transmission system is caused to go out in recovery process
The problem of now collapsing, impacting communication channel again is the method for operation of power grid operation personnel's reasonable arrangement AC-DC hybrid power grid
Reference is provided, ensures the safe and stable operation of AC-DC hybrid power grid.
Detailed description of the invention
Fig. 1 is the optimization method flow chart of communication channel ability to transmit electricity in AC-DC hybrid power grid in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of AC-DC hybrid power grid in the embodiment of the present invention；
Fig. 3 is the Thevenin's equivalence schematic diagram of AC-DC hybrid power grid in the embodiment of the present invention；
Fig. 4 is Sichuan Electric Power Network structure rough schematic view in the embodiment of the present invention；
Fig. 5 is that central Sichuan is switched on three big dc power curve graphs less in the embodiment of the present invention；
Fig. 6 be in the embodiment of the present invention central Sichuan be switched on less Chongqing Hubei Province section power curve graph；
Fig. 7 is South Sichuan unit and guest's gold in the embodiment of the present invention, gives the mating power supply power-angle curve figure of direct current again；
Fig. 8 is multiple dragon in the embodiment of the present invention, double imperial converter station voltage curves；
Fig. 9 is to reduce South Sichuan in the embodiment of the present invention to be switched on 3,000,000 kilowatt three big dc power curve graph；
Figure 10 is to reduce South Sichuan in the embodiment of the present invention to be switched on 3,000,000 kilowatts of Chongqings Hubei Province section power curve graph；
Figure 11 is to reduce South Sichuan in the embodiment of the present invention to be switched on after 3,000,000 kilowatts multiple dragon, double imperial converter station voltage patterns；
Figure 12 is to reduce South Sichuan in the embodiment of the present invention to be switched on 5,000,000 kilowatt three big dc power curve graph；
Figure 13 is to reduce South Sichuan in the embodiment of the present invention to be switched on 5,000,000 kilowatts of Chongqings Hubei Province section power curve graph；
Figure 14 is that be switched on after 5,000,000 kilowatts multiple dragon, double imperial converter station voltages of South Sichuan is reduced in the embodiment of the present invention is bent
Line chart；
Figure 15 is to reduce South Sichuan in the embodiment of the present invention to be switched on South Sichuan unit and guest's gold after 5,000,000 kilowatts, multiple
Give the mating power supply power-angle curve figure of direct current.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Embodiment 1
The embodiment of the present invention 1 provides a kind of optimization method of communication channel ability to transmit electricity in AC-DC hybrid power grid, this is excellent
The specific flow chart of change method is as shown in Figure 1, detailed process is as follows:
S101: two-shipper equivalence is carried out to sending end AC system according to the dynamic response curve of AC-DC hybrid power grid, is obtained
Advanced electric power generator group and lag electric power generator group；
S102: the advanced electric power generator group and lag electric power generator group obtained according to S101 is from DC side to AC-DC hybrid power grid
Carry out Thevenin's equivalence；
S103: AC-DC hybrid power grid is adjusted according to the Thevenin's equivalence result of the obtained AC-DC hybrid power grid of S102
The method of operation.
In above-mentioned S101, two-shipper etc. is carried out to sending end AC system according to the dynamic response curve of AC-DC hybrid power grid
Value, obtaining advanced electric power generator group and lag electric power generator group, detailed process is as follows:
1) failure that DC transmission system may be occurred by power system simulation software (PSD-BPA, PSASP etc.)
(including commutation failure failure and successive commutation failure failure simultaneously.) off-line simulation is carried out, obtain the dynamic of AC-DC hybrid power grid
State response curve；
2) two-shipper equivalence is carried out to sending end AC system according to the dynamic response curve of AC-DC hybrid power grid, according to the following formula
Calculate the revolving speed and generator rotor angle of advanced electric power generator group:
Wherein, ωsIndicate the revolving speed of advanced electric power generator group, δsIndicate the generator rotor angle of advanced electric power generator group, ωiIndicate advanced hair
The revolving speed of i-th generating set, δ in motor groupiIndicate the generator rotor angle of i-th generating set in advanced electric power generator group, S indicates advanced
The total number of units of generating set in electric power generator group；MSIndicate the inertia time constant of advanced electric power generator group, andMiIt indicates
The inertia time constant of i-th generating set in advanced electric power generator group；
3) revolving speed and generator rotor angle of lag electric power generator group are calculated according to the following formula:
Wherein, ωAIndicate the revolving speed of lag electric power generator group, δAIndicate the generator rotor angle of lag electric power generator group, ωjIndicate lag hair
The revolving speed of jth platform generating set, δ in motor groupjIndicate the generator rotor angle of jth platform generating set in lag electric power generator group, A indicates lag
The total number of units of generating set in electric power generator group；MAIndicate the inertia time constant of lag electric power generator group, andMjIt indicates
Lag the inertia time constant of jth platform generating set in electric power generator group.
In above-mentioned S102, AC-DC hybrid power grid is carried out from DC side according to advanced electric power generator group and lag electric power generator group
Detailed process is as follows for Thevenin's equivalence:
1) Thevenin's equivalence is carried out to advanced electric power generator group and lag electric power generator group respectively, obtains wearing for advanced electric power generator group
The Thevenin's equivalence result of dimension south equivalent result and lag electric power generator group；
2) according to the Thevenin's equivalence result of advanced electric power generator group and lag electric power generator group Thevenin's equivalence result to from
DC side carries out Thevenin's equivalence to AC-DC hybrid power grid.
The structural schematic diagram of AC-DC hybrid power grid is as shown in Fig. 2, wherein advanced electric power generator group and lag electric power generator group be all
Belong to sending end AC system, sending end AC system is connect by DC transmission system with receiving end AC system.E therein1It indicates
The Dai Weinan equivalent potential amplitude of advanced electric power generator group, E2Indicate the Dai Weinan equivalent potential amplitude of lag electric power generator group, δ1It indicates
The equivalent generator rotor angle of Dai Weinan of advanced electric power generator group, δ2Indicate the equivalent generator rotor angle of Dai Weinan of lag electric power generator group, X1Indicate advanced power generation
The Dai Weinan equivalent reactance of a group of planes, X2Indicate the Dai Weinan equivalent reactance of lag electric power generator group.
The Thevenin's equivalence schematic diagram of AC-DC hybrid power grid is as shown in figure 3, according to the Dai Weinan etc. of advanced electric power generator group
The Thevenin's equivalence result for being worth result and lag electric power generator group carries out Thevenin's equivalence to AC-DC hybrid power grid to from DC side
Detailed process is as follows:
The Dai Weinan equivalent potential amplitude and Dai Weinan equivalent reactance of AC-DC hybrid power grid are calculated according to the following formula:
Wherein, E indicates the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid, and X indicates wearing for AC-DC hybrid power grid
Southern equivalent reactance is tieed up, δ indicates the equivalent generator rotor angle of AC-DC hybrid power grid, E1Indicate the Dai Weinan equivalent potential of advanced electric power generator group
Amplitude, E2Indicate the Dai Weinan equivalent potential amplitude of lag electric power generator group, δ1Indicate the equivalent function of the Dai Weinan of advanced electric power generator group
Angle, δ2Indicate the equivalent generator rotor angle of Dai Weinan of lag electric power generator group, X1Indicate the Dai Weinan equivalent reactance of advanced electric power generator group, X2Table
Show the Dai Weinan equivalent reactance of lag electric power generator group.
When commutation failure twice, DC transmission system occur in succession simultaneously for the DC transmission system close to sending end AC system
Bridge wall short circuit is connected and subsequent recovery process mesolow current limliting inverter side change of current valve group up and down during primary complete commutation failure
Etc. control responses serious impact can be caused to sending end AC system, in sending end AC system generating set distance fault impact ground
Point electrical distance is different, and disturbed impact degree is different, therefore can cause mutual swing, causes the Dai Weinan of AC-DC hybrid power grid
Equivalent potential amplitude decline.So in above-mentioned S103, by the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid and potential threshold
Value compares, if the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid is more than threshold potential, adjusts AC-DC hybrid power grid
The method of operation, specifically reduce the power output of generating set in advanced electric power generator group, and increase accordingly advanced electric power generator group with it is stagnant
Afterwards between electric power generator group generating set power output；If the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid is no more than potential threshold
Value, then without being adjusted to the method for operation of AC-DC hybrid power grid.
Based on the same inventive concept, it is defeated to additionally provide communication channel in a kind of AC-DC hybrid power grid for the embodiment of the present invention 1
The optimization device of electric energy power, the principle that these equipment solve the problems, such as and communication channel transmission of electricity energy in above-mentioned AC-DC hybrid power grid
The optimization method of power is similar, and the optimization device of communication channel ability to transmit electricity may include the first equivalence in the AC-DC hybrid power grid
Module, the second equivalent module and adjustment module, introduce the function of above three module separately below:
Therein first equivalent module, for the dynamic response curve according to AC-DC hybrid power grid to sending end AC system
It is equivalent to carry out two-shipper, obtains advanced electric power generator group and lag electric power generator group；
Therein second equivalent module is used for according to advanced electric power generator group and lag electric power generator group from DC side to alternating current-direct current
Serial-parallel power grid carries out Thevenin's equivalence；
Adjustment module therein, for adjusting alternating current-direct current mixed connection electricity according to the Thevenin's equivalence result of AC-DC hybrid power grid
The method of operation of net.
The equivalent module of above-mentioned first carries out sending end AC system according to the dynamic response curve of AC-DC hybrid power grid
Two-shipper is equivalent, and obtaining advanced electric power generator group and lag electric power generator group, detailed process is as follows:
1) DC transmission system may be occurred failure (including simultaneously commutation failure failure and successive commutation failure therefore
Barrier) off-line simulation is carried out, obtain the dynamic response curve of AC-DC hybrid power grid；
2) two-shipper equivalence is carried out to sending end AC system according to the dynamic response curve of AC-DC hybrid power grid, specifically had:
The revolving speed and generator rotor angle of advanced electric power generator group 2-1) are calculated according to the following formula:
Wherein, ωsIndicate the revolving speed of advanced electric power generator group, δsIndicate the generator rotor angle of advanced electric power generator group, ωiIndicate advanced hair
The revolving speed of i-th generating set, δ in motor groupiIndicate the generator rotor angle of i-th generating set in advanced electric power generator group, S indicates advanced
The total number of units of generating set in electric power generator group；MSIndicate the inertia time constant of advanced electric power generator group, andMiIt indicates
The inertia time constant of i-th generating set in advanced electric power generator group；
The revolving speed and generator rotor angle of lag electric power generator group 2-2) are calculated according to the following formula:
Wherein, ωAIndicate the revolving speed of lag electric power generator group, δAIndicate the generator rotor angle of lag electric power generator group, ωjIndicate lag hair
The revolving speed of jth platform generating set, δ in motor groupjIndicate the generator rotor angle of jth platform generating set in lag electric power generator group, A indicates lag
The total number of units of generating set in electric power generator group；MAIndicate the inertia time constant of lag electric power generator group, andMjIt indicates
Lag the inertia time constant of jth platform generating set in electric power generator group.
Above-mentioned second equivalent module is according to advanced electric power generator group and lag electric power generator group from DC side to alternating current-direct current mixed connection electricity
Net carries out Thevenin's equivalence, and detailed process is as follows:
1) Thevenin's equivalence is carried out to advanced electric power generator group and lag electric power generator group respectively, obtains wearing for advanced electric power generator group
The Thevenin's equivalence result of dimension south equivalent result and lag electric power generator group；
2) according to the Thevenin's equivalence result of advanced electric power generator group and lag electric power generator group Thevenin's equivalence result to from
DC side carries out Thevenin's equivalence to AC-DC hybrid power grid.
Above-mentioned second equivalent module wears dimension according to the Thevenin's equivalence result of advanced electric power generator group and lag electric power generator group
Detailed process is as follows to Thevenin's equivalence is carried out to AC-DC hybrid power grid from DC side for southern equivalence result:
The Dai Weinan equivalent potential amplitude and Dai Weinan equivalent reactance of AC-DC hybrid power grid are calculated according to the following formula:
Wherein, E indicates the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid, and X indicates wearing for AC-DC hybrid power grid
Southern equivalent reactance is tieed up, δ indicates the equivalent generator rotor angle of AC-DC hybrid power grid, E1Indicate the Dai Weinan equivalent potential of advanced electric power generator group
Amplitude, E2Indicate the Dai Weinan equivalent potential amplitude of lag electric power generator group, δ1Indicate the equivalent function of the Dai Weinan of advanced electric power generator group
Angle, δ2Indicate the equivalent generator rotor angle of Dai Weinan of lag electric power generator group, X1Indicate the Dai Weinan equivalent reactance of advanced electric power generator group, X2Table
Show the Dai Weinan equivalent reactance of lag electric power generator group.
Above-mentioned adjustment module adjusts the fortune of AC-DC hybrid power grid according to the Thevenin's equivalence result of AC-DC hybrid power grid
Detailed process is as follows for line mode:
By the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid compared with threshold potential, if AC-DC hybrid power grid
Dai Weinan equivalent potential amplitude is more than threshold potential, then adjusts the method for operation of AC-DC hybrid power grid, is specifically reduced advanced
The power output of generating set in electric power generator group, and increase accordingly advanced electric power generator group and lag electric power generator group between generating set go out
Power；If the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid is no more than threshold potential, without to AC-DC hybrid power grid
The method of operation be adjusted.
Embodiment 2
After group of planes oscillation in AC-DC hybrid power grid in actual operation certain failure excitation sending end AC systems, by
Swinging influences to involve, and DC converter busbar voltage is fallen, and the transmission power of DC transmission system will be caused to go out in recovery process
The problem of now collapsing, impacting communication channel again, the embodiment of the present invention 2 is based on Sichuan Electric Power Network structure, and to provide a kind of alternating current-direct current mixed
The optimization method for joining communication channel ability to transmit electricity in power grid specifies that falling for DC transmission system transmission power exchanges sending end
System causes the influence situation of secondary pulse and important weak section ability to transmit electricity, and detailed process is as follows:
Power grid includes southwestern power grid, Central China Power Grid, North China Power Telecommunication Network, East China Power Grid, Northwest Grid and Northeast China Power Grid totally 6 electricity
Web area, wherein southwestern power grid and Central China Power Grid are by Chongqing Hubei Province interconnection interconnection, North China Power Telecommunication Network and Central China Power Grid pass through extra-high voltage
Interconnection interconnection.Chongqing of Sichuan section is made of Huangyan-Wan County double loop and Great Gulch-slab bridge double loop, and Hubei Province section that changes is by nine disks-dragon's fountain
Double loop and Zhang Jiaba-bestow favour double loop composition, and Sichuan Electric Power Network rough schematic view is as shown in Figure 4.
S201: the fault scenes such as more times extra-high voltage DC transmission systems of off-line simulation while commutation failure:
Single failure forever occurs at East China Power Grid some areas route 1.0 seconds, causes to give again, brocade Soviet Union and guest's Jin San great extra-high voltage
Commutation failure occurs simultaneously for direct current, and reclosing unsuccessful reclosing at 2.1 seconds causes the generation second simultaneously again of three big extra-high voltage direct-currents
Secondary commutation failure, the interval of commutation failure impact twice 1.1 seconds.When central Sichuan booting is less, central Sichuan is switched on three greatly less
Dc power curve graph is as shown in Figure 5.From figure 5 it can be seen that three big extra-high voltage direct-currents are in succession twice after commutation failure, guest
And then gold gives two big extra-high voltage direct-currents again and a power fall down occurs, such as red circle position in figure, cause to Chongqing Hubei Province section
Again power rush.Guest's gold extra-high voltage direct-current is minimum to drop into 5,550,000 kilowatts, gives that extra-high voltage direct-current is minimum to be dropped into again
492 kilowatts.
Fig. 6 be central Sichuan be switched on less change Hubei Province section power curve graph, the active power curves including nine disk 500kV routes
Electrode limit with the active power curves of grace 500kV route, Hubei Province section that changes at this time is 1,250,000 kilowatts.
S202: it is equivalent that two-shipper is carried out to sending end AC system:
Fig. 7 is South Sichuan unit and guest's gold, gives the mating power supply power-angle curve figure of direct current again, from figure 7 it can be seen that extra-high
Commutation failure impact twice has caused a group of planes in Sichuan Province and has waved straightening stream in succession, and the mating power supply unit of direct current is to South Sichuan machine
Group's amplitude of fluctuation is larger.
S203: Thevenin's equivalence is carried out respectively to advanced electric power generator group and lag electric power generator group, and according to advanced generator
Group Thevenin's equivalence result and lag electric power generator group Thevenin's equivalence result to from DC side to AC-DC hybrid power grid into
Row Thevenin's equivalence:
Fig. 8 is multiple dragon, double imperial converter station voltage curves, and after second of commutation failure, busbar voltage is minimum falls for multiple dragon
To 0.72pu, busbar voltage is minimum drops into 0.71pu for double dragons.
It can thus be seen that when DC transmission system is completely sent, when the method for operation arranges unit booting in river south more, after disturbed
Group of planes oscillation is possible to induce another Secondary Shocks of dc power, and it is stable defeated with communication channel to directly affect sending end AC system
Electric energy power.
S204: the adjustment method of operation:
It reduces South Sichuan to be switched on 3,000,000 kilowatts, increases central Sichuan and be switched on 3,000,000 kilowatts, Hubei Province section transmission of electricity of at this moment changing
Capability improving to 1,850,000 kilowatts, reduce South Sichuan be switched on 3,000,000 kilowatt three big dc power curve graph and reduce South Sichuan
The 3000000 kilowatts of Chongqing Hubei Province section power curve graph difference that are switched on are as shown in Figure 9 and Figure 10.
It is switched on after 3,000,000 kilowatts it can be seen in figure 9 that reducing South Sichuan, three big extra-high voltage direct-currents are in succession twice
After commutation failure, although guest is golden, gives two big extra-high voltage direct-currents again still there is power fall down, guest's gold extra-high voltage direct-current again
It is minimum to drop into 6,180,000 kilowatts, it gives that extra-high voltage direct-current is minimum to drop into 517 kilowatts again, 630,000 kilowatts has been respectively increased than before
With 250,000 kilowatts, reduce to Chongqing Hubei Province section power rush, at this time change Hubei Province section electrode limit be 1,850,000 kilowatts, such as scheme
Shown in 10.
Figure 11 is to reduce South Sichuan to be switched on after 3,000,000 kilowatts multiple dragon, double imperial converter station voltage patterns, second of commutation failure
Afterwards, multiple imperial busbar voltage is minimum drops into 0.76pu, and busbar voltage is minimum drops into 0.74pu for double dragons.
It is as shown in figure 12 to reduce the South Sichuan 5,000,000 kilowatt three big dc power curve graph that is switched on, it can from Figure 12
Out, continue after reducing South Sichuan booting, three big extra-high voltage direct-currents are twice after commutation failure, guest's gold gives Liang great Te again in succession
Although there is power fall down again in high voltage direct current, and such as the black circle position in Figure 12, but guest's gold extra-high voltage direct-current is minimum drops into
It 7000000 kilowatts, giving that extra-high voltage direct-current is minimum to drop into 560 kilowatts again, being respectively increased 820,000 when than reducing by 3,000,000 kilowatts of bootings
Kilowatt and 430,000 kilowatts, the electrode limit for Hubei Province section that changes at this time is further promoted, and reaches 2,450,000 kilowatts, is reduced South Sichuan and is opened
5,000,000 kilowatts of Chongqings of machine Hubei Province section power curve graph is as shown in figure 13.Figure 14 is to reduce South Sichuan to be switched on after 5,000,000 kilowatts again
Imperial, double imperial converter station voltage curves.
After second of commutation failure, multiple dragon busbar voltage is minimum to drop into 0.89pu, and busbar voltage is minimum drops into for double dragons
0.88pu.Comparison diagram 7 it can be found that reduce South Sichuan be switched on South Sichuan unit and guest's gold after 5,000,000 kilowatts, give direct current again
Mating power supply power-angle curve figure is as shown in figure 15, after reducing the booting of South Sichuan unit, a southern group of planes and Bin Jin, gives direct current again
Mating unit power-angle oscillation amplitude reduces, and multiple dragon, the Voltage Drop degree of double imperial change of current buses are substantially reduced.
For convenience of description, each section of apparatus described above is divided into various modules with function or unit describes respectively.
Certainly, each module or the function of unit can be realized in same or multiple softwares or hardware when implementing the application.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field can still modify to a specific embodiment of the invention referring to above-described embodiment or
Equivalent replacement, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent replacement
Within bright claims.
Claims (10)
1. the optimization method of communication channel ability to transmit electricity in a kind of AC-DC hybrid power grid characterized by comprising
Two-shipper equivalence is carried out to sending end AC system according to the dynamic response curve of AC-DC hybrid power grid, obtains advanced generator
Group and lag electric power generator group；
Thevenin's equivalence is carried out to AC-DC hybrid power grid from DC side according to advanced electric power generator group and lag electric power generator group；
The method of operation of AC-DC hybrid power grid is adjusted according to the Thevenin's equivalence result of AC-DC hybrid power grid；
It is described according to the Thevenin's equivalence result of AC-DC hybrid power grid adjust AC-DC hybrid power grid the method for operation include:
If the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid is more than threshold potential, generator in advanced electric power generator group is reduced
The power output of group, and increase accordingly advanced electric power generator group and lag the power output of generating set between electric power generator group.
2. the optimization method of communication channel ability to transmit electricity, feature exist in AC-DC hybrid power grid according to claim 1
In the dynamic response curve according to AC-DC hybrid power grid carries out two-shipper equivalence to sending end AC system, is sent out in advance
Motor group and lag electric power generator group include:
Off-line simulation is carried out to the failure that DC transmission system may occur, the dynamic response for obtaining AC-DC hybrid power grid is bent
Line；
Two-shipper equivalence is carried out to sending end AC system according to the dynamic response curve of AC-DC hybrid power grid, is calculated according to the following formula super
The revolving speed and generator rotor angle of preceding electric power generator group:
Wherein, ωsIndicate the revolving speed of advanced electric power generator group, δsIndicate the generator rotor angle of advanced electric power generator group, ωiIndicate advanced generator
The revolving speed of i-th generating set, δ in groupiIndicate the generator rotor angle of i-th generating set in advanced electric power generator group, S indicates advanced power generation
The total number of units of generating set in a group of planes；MSIndicate the inertia time constant of advanced electric power generator group, andMiIndicate advanced
The inertia time constant of i-th generating set in electric power generator group；
The revolving speed and generator rotor angle of lag electric power generator group are calculated according to the following formula:
Wherein, ωAIndicate the revolving speed of lag electric power generator group, δAIndicate the generator rotor angle of lag electric power generator group, ωjIndicate lag generator
The revolving speed of jth platform generating set, δ in groupjIndicate the generator rotor angle of jth platform generating set in lag electric power generator group, A indicates lag power generation
The total number of units of generating set in a group of planes；MAIndicate the inertia time constant of lag electric power generator group, andMjIndicate lag
The inertia time constant of jth platform generating set in electric power generator group.
3. the optimization method of communication channel ability to transmit electricity, feature exist in AC-DC hybrid power grid according to claim 2
In the failure that the DC transmission system may occur includes commutation failure failure and successive commutation failure failure simultaneously.
4. the optimization method of communication channel ability to transmit electricity, feature exist in AC-DC hybrid power grid according to claim 2
In the advanced electric power generator group of basis and lag electric power generator group carry out Thevenin's equivalence packet to AC-DC hybrid power grid from DC side
It includes:
Thevenin's equivalence is carried out to advanced electric power generator group and lag electric power generator group respectively, obtains the Dai Weinan etc. of advanced electric power generator group
It is worth result and lags the Thevenin's equivalence result of electric power generator group；
According to the Thevenin's equivalence result of advanced electric power generator group and the Thevenin's equivalence result of lag electric power generator group from DC side pair
AC-DC hybrid power grid carries out Thevenin's equivalence.
5. the optimization method of communication channel ability to transmit electricity, feature exist in AC-DC hybrid power grid according to claim 4
In the Thevenin's equivalence result of, the advanced electric power generator group of basis and the Thevenin's equivalence result of lag electric power generator group from DC side
Carrying out Thevenin's equivalence to AC-DC hybrid power grid includes:
The Dai Weinan equivalent potential amplitude and Dai Weinan equivalent reactance of AC-DC hybrid power grid are calculated according to the following formula:
Wherein, E indicates the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid, and X indicates the Dai Weinan of AC-DC hybrid power grid
Equivalent reactance, δ indicate the equivalent generator rotor angle of AC-DC hybrid power grid, E1Indicate the Dai Weinan equivalent potential width of advanced electric power generator group
Value, E2Indicate the Dai Weinan equivalent potential amplitude of lag electric power generator group, δ1Indicate the equivalent generator rotor angle of the Dai Weinan of advanced electric power generator group,
δ2Indicate the equivalent generator rotor angle of Dai Weinan of lag electric power generator group, X1Indicate the Dai Weinan equivalent reactance of advanced electric power generator group, X2Indicate stagnant
The Dai Weinan equivalent reactance of electric power generator group afterwards.
6. the optimization device of communication channel ability to transmit electricity in a kind of AC-DC hybrid power grid characterized by comprising
First equivalent module, for carrying out two-shipper etc. to sending end AC system according to the dynamic response curve of AC-DC hybrid power grid
Value obtains advanced electric power generator group and lag electric power generator group；
Second equivalent module, for according to advanced electric power generator group and lag electric power generator group from DC side to AC-DC hybrid power grid into
Row Thevenin's equivalence；
Module is adjusted, for adjusting the operation side of AC-DC hybrid power grid according to the Thevenin's equivalence result of AC-DC hybrid power grid
Formula；
The adjustment module is specifically used for:
If the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid is more than threshold potential, generator in advanced electric power generator group is reduced
The power output of group, and increase accordingly advanced electric power generator group and lag the power output of generating set between electric power generator group.
7. the optimization device of communication channel ability to transmit electricity, feature exist in AC-DC hybrid power grid according to claim 6
In the described first equivalent module is specifically used for:
Off-line simulation is carried out to the failure that DC transmission system may occur, the dynamic response for obtaining AC-DC hybrid power grid is bent
Line；
Two-shipper equivalence is carried out to sending end AC system according to the dynamic response curve of AC-DC hybrid power grid, is calculated according to the following formula super
The revolving speed and generator rotor angle of preceding electric power generator group:
Wherein, ωsIndicate the revolving speed of advanced electric power generator group, δsIndicate the generator rotor angle of advanced electric power generator group, ωiIndicate advanced generator
The revolving speed of i-th generating set, δ in groupiIndicate the generator rotor angle of i-th generating set in advanced electric power generator group, S indicates advanced power generation
The total number of units of generating set in a group of planes；MSIndicate the inertia time constant of advanced electric power generator group, andMiIndicate advanced
The inertia time constant of i-th generating set in electric power generator group；
The revolving speed and generator rotor angle of lag electric power generator group are calculated according to the following formula:
Wherein, ωAIndicate the revolving speed of lag electric power generator group, δAIndicate the generator rotor angle of lag electric power generator group, ωjIndicate lag generator
The revolving speed of jth platform generating set, δ in groupjIndicate the generator rotor angle of jth platform generating set in lag electric power generator group, A indicates lag power generation
The total number of units of generating set in a group of planes；MAIndicate the inertia time constant of lag electric power generator group, andMjIndicate lag
The inertia time constant of jth platform generating set in electric power generator group.
8. the optimization device of communication channel ability to transmit electricity, feature exist in AC-DC hybrid power grid according to claim 7
In the failure that the DC transmission system may occur includes commutation failure failure and successive commutation failure failure simultaneously.
9. the optimization device of communication channel ability to transmit electricity, feature exist in AC-DC hybrid power grid according to claim 7
In the described second equivalent module is specifically used for:
Thevenin's equivalence is carried out to advanced electric power generator group and lag electric power generator group respectively, obtains the Dai Weinan etc. of advanced electric power generator group
It is worth result and lags the Thevenin's equivalence result of electric power generator group；
According to the Thevenin's equivalence result of advanced electric power generator group and the Thevenin's equivalence result of lag electric power generator group from DC side pair
AC-DC hybrid power grid carries out Thevenin's equivalence.
10. the optimization device of communication channel ability to transmit electricity, feature exist in AC-DC hybrid power grid according to claim 9
In the described second equivalent module is specifically used for:
The Dai Weinan equivalent potential amplitude and Dai Weinan equivalent reactance of AC-DC hybrid power grid are calculated according to the following formula:
Wherein, E indicates the Dai Weinan equivalent potential amplitude of AC-DC hybrid power grid, and X indicates the Dai Weinan of AC-DC hybrid power grid
Equivalent reactance, δ indicate the equivalent generator rotor angle of AC-DC hybrid power grid, E1Indicate the Dai Weinan equivalent potential width of advanced electric power generator group
Value, E2Indicate the Dai Weinan equivalent potential amplitude of lag electric power generator group, δ1Indicate the equivalent generator rotor angle of the Dai Weinan of advanced electric power generator group,
δ2Indicate the equivalent generator rotor angle of Dai Weinan of lag electric power generator group, X1Indicate the Dai Weinan equivalent reactance of advanced electric power generator group, X2Indicate stagnant
The Dai Weinan equivalent reactance of electric power generator group afterwards.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723726A (en) * | 2012-06-01 | 2012-10-10 | 中国电力科学研究院 | Method for determining maximal direct current receiving quantity in alternating current receiving system |
| CN102738819A (en) * | 2012-06-06 | 2012-10-17 | 中国电力科学研究院 | Power transmission system for improving transmission capability of alternating-current circuit through using mixed current converting technology |
| CN104638631A (en) * | 2015-03-05 | 2015-05-20 | 中国南方电网有限责任公司 | Direct current amplitude limiting method for direct current solitary island power transmission system |
-
2017
- 2017-09-22 CN CN201710862488.2A patent/CN107732899B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723726A (en) * | 2012-06-01 | 2012-10-10 | 中国电力科学研究院 | Method for determining maximal direct current receiving quantity in alternating current receiving system |
| CN102738819A (en) * | 2012-06-06 | 2012-10-17 | 中国电力科学研究院 | Power transmission system for improving transmission capability of alternating-current circuit through using mixed current converting technology |
| CN104638631A (en) * | 2015-03-05 | 2015-05-20 | 中国南方电网有限责任公司 | Direct current amplitude limiting method for direct current solitary island power transmission system |
Non-Patent Citations (2)
| Title |
|---|
| Study on Thevenin equivalent model and algorithm of AC/DC power systems for voltage instability identification;Jianwei Zhao et al.;《2014 International Conference on Power System Technology (POWERCON 2014)》;20141222;第633-640页 * |
| 区域电网内弱联机群摆动对互联系统功角稳定性的影响;顾卓远等;《中国电机工程学报》;20150320;第35卷(第6期);第1336-1343页 * |
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