CN102437572A - Power flow control system - Google Patents
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- CN102437572A CN102437572A CN2011104320128A CN201110432012A CN102437572A CN 102437572 A CN102437572 A CN 102437572A CN 2011104320128 A CN2011104320128 A CN 2011104320128A CN 201110432012 A CN201110432012 A CN 201110432012A CN 102437572 A CN102437572 A CN 102437572A
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention relates to a power flow control system. In the system, active power is transmitted between a parallel-side converter and a series-side converter of a device by virtue of third harmonic so that the series-side converter can adjust active power distribution on a power transmission line. The power flow control system effectively improves the topological structure and the power exchange mode of the existing UPFC (Unified Power Flow Controller) device so as to save the total cost of the device and improve the operating reliability and control flexibility of the whole device.
Description
Technical field
The present invention relates to a kind of power cable control system, relate in particular to a kind of trend control system of power cable.
Background technology
Along with distributed power generation (DG; Distributed generation) development of technology; Increasing middle-size and small-size DG is inserted the power distribution network side of electric power system; It is reverse that traditional fixing trend that is transmitted to power distribution network by power transmission network takes place in the access of a large amount of DG, based on the variability of regenerative resource DG owing to weather, makes system's required power control be used to compensate the intermittence of DG; The continuous growth of customer charge needs the trend control device to improve the power delivery ability of existing line; Power between interconnection blocks, causes the existence of huge line loss circulating power and the two-way trend between interconnection to need suitable trend control; Just complicated Power Exchange needs frequent trend control between flourish intelligent grid and electricity market.Therefore, the assurance of trend control appliance power network safety operation.
At present; THE UPFC (Unified power flow controller; UPFC) be the most powerful tidal current controller of function; It is by back-to-back two identical current transformer (VSC; Voltage source converter) be coupled to form through dc capacitor, regulate through line impedance, voltage phase angle and voltage magnitude to electric power system, can be simultaneously or realize the control of electrical system bus voltage, circuit active power trend, reactive power trend and system stability independently.But whole UPFC installed capacity is big, complex structure, cause manufacture and design the cycle long, maintenance time is long, floor space is big, also big to the concentrated influence of surrounding environment.In addition, owing to adopt high-vol, therefore need the corresponding protection device, make that the whole cost of UPFC is comparatively expensive, this has limited its application, and complicated simultaneously structure also lets it be easy to generate fault.
Summary of the invention
Technical problem to be solved by this invention provides a kind of trend control system the topological structure and the Power Exchange mode of existing UPFC device is done effective improvement; With the total cost of economy system, improve the operational reliability and control flexibility of whole device simultaneously.
The technical scheme that the present invention adopted is:
A kind of trend control system; Comprise parallelly connected side converter, series side current transformer, a Y-Δ transformer, the 2nd Y-Δ transformer; The parallel connection side converter is between an electrical network and a Y-Δ transformer, and the series side current transformer is between the first Y-Δ transformer and the 2nd Y-Δ transformer; Described parallelly connected side converter comprises by back-to-back 3-phase power converter and single-phase converter and being coupled to form through dc capacitor; 3-phase power converter inserts in the transmission line between an electrical network and the Y-Δ transformer through transformer; Single-phase converter becomes triple-frequency harmonics with the first-harmonic in the electrical network, and through the Y type winding neutral point of a Y-Δ transformer triple harmonic current that produces is evenly distributed in the transmission line between a Y-Δ transformer and the 2nd Y-Δ transformer; Described series side current transformer comprises the trend control unit on every phase transmission line; Described trend control unit comprises single-phase converter and the dc capacitor that is connected with single-phase converter, and single-phase converter is linked in the transmission line through a coupling transformer series connection; The 2nd Y-Δ transformer Y type winding neutral ground; Current transformer on described parallelly connected side converter and the series side current transformer is connected with the output of its controller of control respectively, and two inputs of controller are respectively through in current transformer and the voltage transformer access transmission line.
Press such scheme, described trend control system also comprises a system-level controller, and this system-level controller is controlled the controller of each current transformer respectively.
Press such scheme, the trend control unit has a plurality ofly on described every phase transmission line, is connected in the transmission line.
Utilize triple-frequency harmonics between parallelly connected side converter that installs and series side current transformer, to transmit active power, make the series side current transformer can reach the purpose that the active power on the adjusting transmission line distributes with this.
The 3-phase power converter of parallel connection side converter utilizes the first-harmonic in the electrical network to build pressure and make it reach set point for the public direct-current capacitance voltage.
Single-phase converter in the parallel connection side converter; The reference signal of the demand of active power on the circuit being sent according to system-level controller; This current transformer sends corresponding big or small triple harmonic current, and the Y side neutral point through Y-Δ transformer is evenly distributed in the transmission line.
The single-phase converter of series side current transformer absorbs the triple harmonic current in the circuit on the one hand under the effect of controller; For the electric capacity of self is set up the voltage of specifying size; According to the requirement of system-level controller, produce the fundamental frequency voltage of respective magnitudes and phase place on the other hand to power control.
The actual power demand of system-level controller response; Promptly as requested performance number produces corresponding reference signal; And pass to the controller of each current transformer respectively; The controller of each current transformer is controlled the switching tube of each current transformer according to voltage or current reference value that system-level controller is given again, thereby accomplishes the control to the circuit trend.
The invention has the advantages that:
1. improved the reliability of entire system.Find that behind the fault mode of having analyzed composite type FACTS device the public direct-current electric capacity between the current transformer has reduced the reliability of device, because the fault of a current transformer can spread to whole device through electric capacity.The present invention has removed this public direct-current electric capacity in every phase transmission line, the current transformer in the FACTS device can independent operating like this, has also just improved the reliability of system.After having removed public direct-current electric capacity; The present invention's a plurality of trend control units of in every phase transmission line, connecting; Make distributed form, like this owing to there have been a plurality of trend control units of series connection to do the reliability that redundancy backup has also just improved whole system accordingly.
2. improved the flexibility of system's control.Phase angle difference, busbar voltage on the present invention's control circuit impedance simultaneously, the transmission line come to regulate according to actual needs the active power that is transported to line end with this.The current transformer of trend control unit adopts the form of three single-phase converters in every phase transmission line, thereby can realize each mutually independent power adjustments is suppressed three-phase imbalance through control.
3. the total cost of system is low.The a plurality of trend control units of series connection in every phase transmission line; Make after the distributed form; Though current transformer quantity has increased; But the capacity of each current transformer has diminished, so the current transformer of trend control unit no longer needs high-power components and High-Voltage Insulation, and the total cost of system has also just reduced.
Description of drawings
Fig. 1 is the topological diagram of entire system.
Fig. 2 is the block diagram that is connected of each controller of system and Mathematical Modeling.
Fig. 3 is the control block diagram of system's series side current transformer.
Fig. 4 is the control block diagram of 3-phase power converter in system's parallel connection side converter.
Fig. 5 is the control block diagram of single-phase converter in system's parallel connection side converter.
Fig. 6 is the analogue system sketch.
Fig. 7 is the capacitance voltage waveform of parallelly connected side converter.
Fig. 8 is the waveform of the triple harmonic current effective value that sends of parallelly connected side converter.
Fig. 9 is the capacitance voltage waveform of series side current transformer.
Figure 10 is the waveform that active power changes with control command on the circuit.
Embodiment
Further specify embodiments of the invention below in conjunction with accompanying drawing.
Referring to Fig. 1; A kind of trend control system; Comprise parallelly connected side converter, series side current transformer, a Y-Δ transformer T1, the 2nd Y-Δ transformer T2; The parallel connection side converter is between an electrical network and a Y-Δ transformer T1, and the series side current transformer is between the first Y-Δ transformer T1 and the 2nd Y-Δ transformer T2; Described parallelly connected side converter comprises by back-to-back 3-phase power converter VSC1 and single-phase converter VSC2 and being coupled to form through dc capacitor; 3-phase power converter VSC1 inserts in the transmission line between an electrical network and the Y-Δ transformer T1 through transformer; Single-phase converter VSC2 becomes triple-frequency harmonics with the first-harmonic in the electrical network, and through the Y type winding neutral point of a Y-Δ transformer T1 triple harmonic current that produces is evenly distributed in the transmission line between a Y-Δ transformer T1 and the 2nd Y-Δ transformer T2; Described series side current transformer comprises the trend control unit on every phase transmission line; Described flow controller unit comprises current transformer; The positive pole of current transformer DC side is connected with dc capacitor one end; The negative pole of current transformer DC side is connected with the dc capacitor other end, and current transformer is linked in the transmission line through the series connection of single turn coupling transformer; The Y type winding neutral ground of described the 2nd Y-Δ transformer T2; 3-phase power converter VSC1 on the above-described parallelly connected side converter and single-phase converter VSC2 are furnished with a controller; The current transformer of above-described series side current transformer also is furnished with a controller respectively; Current transformer is connected with the output of controller, and two inputs of controller insert in the transmission line through current transformer and voltage transformer respectively.
Above-described trend control system can also comprise a system-level controller; The actual power demand of this system-level controller response; Promptly as requested performance number produces corresponding reference signal; And passing to the controller of each current transformer respectively, the controller of each current transformer is controlled the switching tube of each current transformer according to voltage or current reference value that system-level controller is given again, thereby accomplishes the control to the circuit trend.
Each controller of system and Mathematical Modeling to be connected block diagram as shown in Figure 2.System-level controller is called as central authorities' control among the figure, and the 3-phase power converter VSC1 of parallelly connected side converter and the controller of single-phase converter VSC2 are referred to as Parallel Control, and the controller of the single-phase converter of series side current transformer is referred to as series connection control.Wherein central authorities' control is to be used for providing according to system requirements the voltage reference signal V of series side current transformer
Se, 3, ref, and the reactive current reference signal V of parallelly connected side converter
Se, 3, refThe voltage reference signal V of series side current transformer
Se, 3, refThrough obtaining series side voltage reference signal ref after the series connection control
V, se,, series side voltage reference signal ref
V, se,Pass through and circuit fundamental frequency electric current I respectively
1, triple harmonic current I
3Calculate series side first-harmonic reference signal ref
V, se, 1With series side triple-frequency harmonics reference signal ref
V, se, 3The reactive current reference signal V of parallel connection side converter
Sh, 1, q, refObtain parallelly connected side voltage reference signal ref through after the Parallel Control
V, sh, parallelly connected side voltage reference signal ref
V, shWith circuit fundamental frequency electric current I
1, triple harmonic current I
3Generate parallelly connected side group reference signal wave ref through Parallel Control together
V, sh, 1With parallelly connected side triple-frequency harmonics reference signal ref
V, sh, 3
Fig. 3 is the control block diagram of the current transformer of series side current transformer, can be found out that by Fig. 3 the current transformer of series side current transformer can send first-harmonic when absorbing triple-frequency harmonics.The triple-frequency harmonics that absorbs is used for keeping series side dc capacitor voltage V
Se, dcStable.The desired value V of dc capacitor voltage
Se, dc, refWith actual value V
Se, dcThrough the relatively back d axle component ref that obtains the triple-frequency harmonics reference voltage through DC control
V, se, 3, d, the d axle component ref of triple-frequency harmonics reference voltage
V, se, 3, dBe used for controlling direct voltage; In order to minimize the caused reactive power of triple-frequency harmonics, with q axle component ref
V, se, 3, qBe made as 0, the current transformer of series side current transformer shows as resistive under triple-frequency harmonics like this; Obtain the phase signal θ of triple harmonic current in the circuit through single-phase phase-locked loop
3Obtain three signals (d axle component ref of triple-frequency harmonics reference voltage above
V, se, 3, d, qAxle component ref
V, se, 3, qWith phase signal θ
3) carry out single-phase dq inverse transformation together, so just obtained the reference wave signal ref of triple-frequency harmonics
V, se, 3System-level controller is to the V that response produced of actual power demand
Se, 1, refGenerate first-harmonic reference signal ref through conversion of signals
V, se, 1, with triple-frequency harmonics reference signal ref
V, se, 3With first-harmonic reference signal ref
V, se, 1After superposeing the reference wave ref of PWM control
V, se, it does the PWM ripple that relatively obtains final control switch pipe break-make with the triangular carrier signal again.
Fig. 4 and Fig. 5 are the control block diagram of parallelly connected side converter, and wherein: Fig. 4 is the control block diagram of 3-phase power converter in system's parallel connection side converter, and Fig. 5 is the control block diagram of single-phase converter in system's parallel connection side converter.In Fig. 4, system-level controller provides the reference value I of q axle component
Sh, 1, q, ref, the desired value V of dc capacitor voltage
Sh, dc, refWith actual value V
Sh, dcThrough the relatively back d axle component I that obtains the fundamental frequency reference current through DC control
Sh, 1, d, refTwo reference signal I
Sh, 1, q, refAnd I
Sh, 1, d, refAnd the actual value I of circuit fundamental frequency electric current
Sh, 1Together through obtaining the dq axle reference signal ref of parallelly connected side control dc capacitor voltage after the Current Control respectively
V, sh, 1, dAnd ref
V, sh, 1, q, to busbar voltage V
sObtain its phase signal θ after locking mutually
1These three signals (dq axle reference signal ref of dc capacitor voltage
V, sh, 1, dAnd ref
V, sh, 1, q, and phase signal θ
1) being input to the reference wave that obtains 3-phase power converter PWM control after the single-phase dq inverse transform block, this reference wave and triangular carrier obtain the PWM ripple of final control switch pipe break-make after relatively, keep stablizing of dc capacitor voltage.Among Fig. 5, the desired value I of the triple harmonic current of output
Sh, 3, refWith actual value I
Sh, 3Obtain the d axle of parallelly connected side control triple harmonic current and the reference signal ref of q axle respectively through current control module
V, sh, 3, dAnd ref
V, sh, 3, qLine voltage distribution is through phase-locked loop (PLL) and multiply by the phase theta that obtains the triple-frequency harmonics reference signal after 3
3Above d axle and the reference signal ref of q axle of these three signal triple harmonic currents
V, sh, 3, dAnd ref
V, sh, 3, q, and the phase theta of triple-frequency harmonics reference signal
3) generate the reference wave ref of the triple harmonic current of output together through single-phase dq conversion
V, sh, 3, this reference wave obtains the switch controlled signal through PWM ripple generation module, thus a certain size triple harmonic current is sent in control.
Can be as required, series connection is provided with a plurality of trend control units on the every phase transmission line between a Y-Δ transformer T1 and the 2nd Y-Δ transformer T2, to reach better trend control.
The present invention compares with existing same device, and reliability of the present invention is higher, control is more flexible, cost is lower.
Under PSCAD/EMTDC simulation software environment, built double loop transmission system simulation model shown in Figure 6.Line parameter circuit value is following:
Every transmission line equivalent impedance is Z
L=1.1+j16.0 (Ω)
Generator V
sRated voltage is 400V, capacity 2.5kVA, 8.7 ° of power factor 0.8 (specified meritorious 2kW) initial phase angles.Infinitely great power end V
rVoltage is 380V, 0 ° of initial phase angle.
Transformer T1, T2 no-load voltage ratio are 400V/380V, and capacity is 2.5kVA, and leakage reactance is calculated by 5%, and Δ/Y connects method.Transformer T1, the T2 equivalent reactance of converting the 400V side are X
T12=0.05 * 400/2500=3.2 (Ω)
Transformer T3, T4 no-load voltage ratio are 380V/380V, and capacity is 2.5kVA, and leakage reactance is calculated by 5%, and the Y/ Δ connects method.Transformer T3, T4 equivalent reactance are X
T34=0.05 * 380/2500 ≈ 2.9 (Ω)
Because transformer capacity is less, its equivalent resistance can not be ignored.Transformer noload losses is 110W, and the equivalent resistance of T1, T2 is (converting the 400V side) R so
T12=110 * 400
2/ 2500
2≈ 2.8 (Ω)
The equivalent resistance of T3, T4 is R
T34=110 * 400
2/ 2500
2≈ 2.5 (Ω)
So the total impedance on every circuit is:
Z
∑＝|Z
L+Z
TI2+Z
T34|＝|1.1+j16.0+2.8+j3.2+2.5+j2.9|＝|6.4+j22.1|≈23Ω
Under this line parameter circuit value, the active power of transmission should be 1kW naturally on every circuit of double loop, promptly
P
r0＝V
S×V
R×sinθ/|Z
∑|＝400×380×sin8.7°/23≈999.6W
If take into account series converter series connection coupling transformer and the influence of parallelly connected current transformer on the line, under this line parameter circuit value on the single line practical natural active power should be lower than 1000W slightly.
In the emulation, the dc capacitor voltage effective value of setting parallelly connected side converter is 400V, and the triple harmonic current effective value of its output is 6A; The DC voltage effective value of setting the series side current transformer is 100V.0.5s the time with parallelly connected side input, the dc capacitor of parallelly connected side converter begins to set up stable voltage and send triple-frequency harmonics according to the magnitude of voltage of setting; 0.5s during 2.5s, the series side current transformer is not put into the state of power adjustments, just utilizes triple-frequency harmonics to charge for dc capacitor; 2.5s～4s, series side current transformer begin to send fundamental frequency voltage according to the instruction that active power is regulated, given end active power is adjusted to 1500W; 4s～7s, active power is reduced to 1000W, and 7s～10s increases to 1200W, and 10s～14s is reduced to 900W once more, and 14s is stabilized in 700W later on.The capacitance voltage waveform of parallel connection side converter is as shown in Figure 7; The waveform of the triple harmonic current effective value that the parallel connection side converter sends is as shown in Figure 8; The capacitance voltage waveform of series side current transformer is as shown in Figure 9; Active power is shown in figure 10 with the waveform that control command changes on the circuit.
Can see that from top simulation result the instruction that the active power of line end can be followed meritorious demand preferably changes, except overshoot, the fluctuation ratio of active power is in 3%; Connection in series-parallel side dc capacitor voltage and triple harmonic current can keep constant basically during active power changes, the fluctuation ratio of voltage is in 2%, and the fluctuation ratio of triple harmonic current effective value is in 5%.
Claims (3)
1. trend control system; It is characterized in that: comprise parallelly connected side converter, series side current transformer, a Y-Δ transformer, the 2nd Y-Δ transformer; The parallel connection side converter is between an electrical network and a Y-Δ transformer, and the series side current transformer is between the first Y-Δ transformer and the 2nd Y-Δ transformer; Described parallelly connected side converter comprises by back-to-back 3-phase power converter and single-phase converter and being coupled to form through dc capacitor; 3-phase power converter inserts in the transmission line between an electrical network and the Y-Δ transformer through transformer; Single-phase converter becomes triple-frequency harmonics with the first-harmonic in the electrical network, and through the Y type winding neutral point of a Y-Δ transformer triple harmonic current that produces is evenly distributed in the transmission line between a Y-Δ transformer and the 2nd Y-Δ transformer; Described series side current transformer comprises the trend control unit on every phase transmission line; Described trend control unit comprises single-phase converter and the dc capacitor that is connected with single-phase converter, and single-phase converter is linked in the transmission line through a coupling transformer series connection; The 2nd Y-Δ transformer Y type winding neutral ground; Current transformer on described parallelly connected side converter and the series side current transformer is connected with the output of its controller of control respectively, and two inputs of controller are respectively through in current transformer and the voltage transformer access transmission line.
2. a kind of trend control system as claimed in claim 1 is characterized in that: described trend control system also comprises a system-level controller, and this system-level controller is controlled the controller of each current transformer respectively.
3. a kind of trend control system as claimed in claim 1 is characterized in that: the trend control unit has a plurality ofly on described every phase transmission line, is connected in the transmission line.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107559A (en) * | 2013-02-06 | 2013-05-15 | 武汉理工大学 | Method of confirming parameters of distributed power flow controller system |
| CN103368180A (en) * | 2013-07-30 | 2013-10-23 | 武汉理工大学 | Timing sequence optimization control method for distributed power flow controller, and controller |
| CN104134968A (en) * | 2014-08-05 | 2014-11-05 | 南京南瑞继保电气有限公司 | Protection method and system for unified power flow controller |
| CN104485657A (en) * | 2014-12-29 | 2015-04-01 | 国家电网公司 | Method and system for determining installation position of direct-current power grid power-flow controller |
| CN105119281A (en) * | 2015-08-31 | 2015-12-02 | 国家电网公司 | UPFC control method with rapid terminal sliding mode variable structure |
| CN105140914A (en) * | 2015-08-17 | 2015-12-09 | 东南大学 | Method for accessing unified power flow controller (UPFC) into system and three-node power injection model |
| CN105226668A (en) * | 2015-08-18 | 2016-01-06 | 国家电网公司 | A kind of addressing for UPFC and capacity collocation method |
| CN105591385A (en) * | 2015-11-20 | 2016-05-18 | 贵州理工学院 | Novel non-linear robustness control system of unified power flow controller |
| CN105610158A (en) * | 2016-02-06 | 2016-05-25 | 武汉理工大学 | Distributed power flow controller and control method therefor |
| CN106374492A (en) * | 2016-10-11 | 2017-02-01 | 浙江群力电气有限公司 | Single-phase star connection load harmonic compensation method and apparatus |
| CN107086576A (en) * | 2017-06-02 | 2017-08-22 | 武汉理工大学 | A kind of Distributed Power Flow controller Multiple Time Scales mathematical model establishing method |
| CN109861240A (en) * | 2019-02-03 | 2019-06-07 | 武汉理工大学 | A kind of control method of the Distributed Power Flow controller based on ADPSS/ETSDAC modeling |
| CN113541145A (en) * | 2021-01-09 | 2021-10-22 | 华北电力大学（保定） | Power flow control topological circuit of three-phase electromagnetic series-type power transmission line with voltage class of 110kV or above |
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| CN103107559B (en) * | 2013-02-06 | 2016-01-20 | 武汉理工大学 | A kind of method determining Distributed Power Flow controller system parameter |
| CN103107559A (en) * | 2013-02-06 | 2013-05-15 | 武汉理工大学 | Method of confirming parameters of distributed power flow controller system |
| CN103368180A (en) * | 2013-07-30 | 2013-10-23 | 武汉理工大学 | Timing sequence optimization control method for distributed power flow controller, and controller |
| CN103368180B (en) * | 2013-07-30 | 2015-07-22 | 武汉理工大学 | Timing sequence optimization control method for distributed power flow controller, and controller |
| CN104134968A (en) * | 2014-08-05 | 2014-11-05 | 南京南瑞继保电气有限公司 | Protection method and system for unified power flow controller |
| CN104134968B (en) * | 2014-08-05 | 2017-04-12 | 南京南瑞继保电气有限公司 | Protection method and system for unified power flow controller |
| CN104485657A (en) * | 2014-12-29 | 2015-04-01 | 国家电网公司 | Method and system for determining installation position of direct-current power grid power-flow controller |
| CN104485657B (en) * | 2014-12-29 | 2016-12-28 | 国家电网公司 | Determine the method and system of direct current network flow controller installation site |
| CN105140914A (en) * | 2015-08-17 | 2015-12-09 | 东南大学 | Method for accessing unified power flow controller (UPFC) into system and three-node power injection model |
| CN105226668A (en) * | 2015-08-18 | 2016-01-06 | 国家电网公司 | A kind of addressing for UPFC and capacity collocation method |
| CN105226668B (en) * | 2015-08-18 | 2017-08-08 | 国家电网公司 | A kind of addressing and capacity collocation method for UPFC |
| CN105119281A (en) * | 2015-08-31 | 2015-12-02 | 国家电网公司 | UPFC control method with rapid terminal sliding mode variable structure |
| CN105119281B (en) * | 2015-08-31 | 2017-08-04 | 国家电网公司 | The UPFC control methods of quick Terminal sliding moding structures |
| CN105591385A (en) * | 2015-11-20 | 2016-05-18 | 贵州理工学院 | Novel non-linear robustness control system of unified power flow controller |
| CN105591385B (en) * | 2015-11-20 | 2018-01-19 | 贵州理工学院 | A kind of THE UPFC novel non-linearity robust control system |
| CN105610158B (en) * | 2016-02-06 | 2018-04-27 | 武汉理工大学 | A kind of Distributed Power Flow controller and its control method |
| CN105610158A (en) * | 2016-02-06 | 2016-05-25 | 武汉理工大学 | Distributed power flow controller and control method therefor |
| CN106374492A (en) * | 2016-10-11 | 2017-02-01 | 浙江群力电气有限公司 | Single-phase star connection load harmonic compensation method and apparatus |
| CN106374492B (en) * | 2016-10-11 | 2019-01-29 | 杭州电力设备制造有限公司 | A kind of method and device of single-phase star-star connection Load harmonic compensation |
| CN107086576A (en) * | 2017-06-02 | 2017-08-22 | 武汉理工大学 | A kind of Distributed Power Flow controller Multiple Time Scales mathematical model establishing method |
| CN107086576B (en) * | 2017-06-02 | 2019-07-23 | 武汉理工大学 | A kind of Distributed Power Flow controller Multiple Time Scales mathematical model establishing method |
| CN109861240A (en) * | 2019-02-03 | 2019-06-07 | 武汉理工大学 | A kind of control method of the Distributed Power Flow controller based on ADPSS/ETSDAC modeling |
| CN109861240B (en) * | 2019-02-03 | 2022-10-04 | 武汉理工大学 | Control method of distributed power flow controller based on ADPSS/ETSDAC modeling |
| CN113541145A (en) * | 2021-01-09 | 2021-10-22 | 华北电力大学（保定） | Power flow control topological circuit of three-phase electromagnetic series-type power transmission line with voltage class of 110kV or above |
| CN113541145B (en) * | 2021-01-09 | 2023-08-18 | 华北电力大学（保定） | 110kV and above voltage class three-phase electromagnetic series type transmission line current control topological circuit |
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