CN103050972B - Micro power grid and large power grid high-voltage intelligent flexible transmission serial connection compensation device and control method thereof - Google Patents

Abstract

The invention relates to a micro power grid and large power grid high-voltage intelligent flexible transmission serial connection compensation device and a control method thereof. The device and the method mainly aim to solve the technical problems of unified tide and poor low-voltage through and bearing capability of an existing parallel connection compensation control device. The technical scheme of the invention is that the micro power grid and large power grid high-voltage intelligent flexible transmission serial connection compensation device comprises a micro power grid side hybrid active power dynamic filter circuit, a micro power grid side parameter detection circuit, an integrated gate commutated thyristor (IGCT) five-level switch topology circuit, an IGCT switch driving circuit, an intelligent flexible transmission serial connection compensation device digital signal processor (DSP) control circuit and the like, wherein a serial connection compensation capacitor circuit of a two-way thyristor switch control on a micro power grid side and a large power grid side is also arranged. The control method comprises the following steps that active power adjusting control quantity Delta P(t)=Delta Ps(t)-Delta Pr(t) and reactive power adjusting control quantity Delta Q(t)=Delta Qs(t)-Delta Qr(t) are formed according to the parameter information which is detected and obtained from the micro power grid side and the large power grid side, so that the control to flexible active power Ps(t) and flexible reactive power Qs(t) is realized.

Description

Micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation and control method thereof

Technical field

The present invention relates to a kind of micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation and control method thereof, it belongs to device (Smart Flexible Transmission Series Compensation Equipment---SFTSCE) and the control method thereof that a kind of micro-capacitance sensor and bulk power grid intelligent flexible when high pressure place is connected transmit series compensation.

Background technology

At present, the micro-capacitance sensor be made up of new forms of energy and bulk power grid connect to form strong intelligent grid at high pressure place, are thought the inevitable development trend of electric power system by domestic and international expert, but, along with the fast development of distributed power source, as China Inner Mongol, a large amount of wind-force of the Northwest, the micro-capacitance sensor of the regenerative resource compositions such as solar energy, defect when being connected with bulk power grid high pressure place (35KV and more than) due to control technology existing, cause electric power to transmit and occur bottleneck, Unified Power Flow, voltage fluctuation, humorous wave interference, the problem of low voltage crossing ability to bear weakness, the technical scheme addressed this problem at present is put in the line to install paralleling compensating device additional substantially, but because paralleling compensating device governing speed is slow, adjustable range is little, obvious shortcoming is there is in solution Unified Power Flow and the weak problem of low voltage crossing ability to bear, therefore need be improved existing compensation arrangement.

Summary of the invention

The object of the invention is the technical problem in solution Unified Power Flow, low voltage crossing ability to bear weakness solving the existence of existing shunt compensation control device, provide a kind of electric power that can solve to transmit the micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation and control method thereof that occur Unified Power Flow, low voltage crossing ability to bear weakness.

The present invention is the technical scheme solving the problems of the technologies described above employing: micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation, and it comprises micro-capacitance sensor side mixed active electric power dynamic filter circuit (HAPDF _s(t)), micro-capacitance sensor side electrical parameter detection circuit, micro-capacitance sensor side power comparison circuit, micro-capacitance sensor side power difference circuit, integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit, integrated gate commutated thyristor (IGCT) switch driving circuit, intelligent flexible transmission series compensation device DSP control circuit, bulk power grid side electrical parameter detection circuit, bulk power grid side power comparison circuit, bulk power grid side power difference circuit and bulk power grid side mixed active electric power dynamic filter circuit (HAPDF _r(t)), wherein: it also comprises the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) and the series compensation capacitor circuit (TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)), the left end of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit and the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) right-hand member be connected, the right-hand member of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit and the series compensation capacitor circuit (TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)) left end be connected, the lower end of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit is connected with the upper end of integrated gate commutated thyristor (IGCT) switch driving circuit, by the operation to integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit, to control the difference P (t) of intermediate point m both sides active power and the difference DELTA Q (t) of reactive power of transmission line, thus the problem of the bottleneck of solution electric power transmission, Unified Power Flow, voltage fluctuation, humorous wave interference, low voltage crossing ability to bear weakness, series compensation capacitor circuit (the TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) left end and the side reactance of transmission line micro-capacitance sensor right-hand member connect, the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) lower end and intelligent flexible transmit the series compensation capacitor circuit (TSSC of the micro-capacitance sensor side bidirectional thyristor switch control rule that series compensation device dsp controller circuit is arranged _s(t)) input and output and communication port connect, the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) right-hand member be connected with the left end of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit, its function passes through TSSC in t _sthe control of (t) make micro-capacitance sensor to the intermediate point m place of transmission line reactance value by control to series compensation capacitor circuit (the TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)) right-hand member and the side reactance of transmission line bulk power grid left end connect, the series compensation capacitor circuit (TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)) lower end and intelligent flexible transmit the series compensation capacitor circuit (TSSC of the bulk power grid side bidirectional thyristor switch control rule that series compensation device dsp controller circuit is arranged _r(t)) input and output and communication port connect, the series compensation capacitor circuit (TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)) left end be connected with the right-hand member of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit, its function passes through TSSC in t _rthe control of (t) make bulk power grid to the intermediate point m place of transmission line reactance value by control to

A control method for described micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation, first it set up the line reactance X at flexible active-power P (t) that in micro-capacitance sensor and bulk power grid connection line, real time bidirectional flows, flexible reactive power power Q (t) and transmission line two ends _lthe micro-capacitance sensor high-pressure side equivalent voltage vector at (t), transmission line two ends the bulk power grid side voltage vector at transmission line two ends with micro-capacitance sensor high-pressure side equivalent voltage vector between voltage vector angle and power angle δ (t), computation model between transmission line between t micro-capacitance sensor to bulk power grid penalty coefficient R (t) after apparatus of the present invention compensate:

$P\left(t\right)=P_s\left(t\right)=-P_r\left(t\right)=\frac{{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{X_L\left(t\right)[1-R\left(t\right)]}\sin \mathrm{\δ}\left(t\right)=\frac{{\left|{\stackrel{\‾}{V}}_s\left(t\right)\right|}^2}{2[1-R_s\left(t\right)]\frac{X_s\left(t\right)}{2}}\sin {\mathrm{\δ}}_s\left(t\right)---\left(1\right)$

In formula (1): the flexible active-power P (t) of real time bidirectional flowing is the maximum that t adopts flexible transfer active power on transmission line after apparatus of the present invention, P _st () is the flexibility series connection active power that t micro-capacitance sensor is sent to bulk power grid through apparatus of the present invention, P _rt () is the flexibility series connection active power that t bulk power grid absorbs from micro-capacitance sensor through apparatus of the present invention; the runtime value of voltage vector on t transmission line, δ _st () is that after apparatus of the present invention adopt, t is vectorial at the micro-capacitance sensor high-pressure side equivalent voltage of S point Real-time Collection with bulk power grid side voltage vector between angle, the reactance value of transmission line between the micro-capacitance sensor side voltage S point of t Real-time Collection after apparatus of the present invention adopt and the intermediate point m of transmission line, x _lt () is the transmission line inductive reactance value jX between t micro-capacitance sensor to bulk power grid _lthe amplitude of (t); X _ct () is the capacity reactance value-jX of transmission line after apparatus of the present invention compensate between t micro-capacitance sensor to bulk power grid _cthe amplitude of (t); R (t) is the penalty coefficient of transmission line after apparatus of the present invention compensate between t micro-capacitance sensor to bulk power grid, 0≤R (t)≤1; R _st () is the penalty coefficient that after apparatus of the present invention are run, the micro-capacitance sensor side voltage S point of t Real-time Collection and intelligent flexible transmit transmission line reactance value between series compensation device mounting points m, x _cst () is through micro-capacitance sensor side bidirectional thyristor switch control rule series compensation capacitor circuit TSSC _sthe t micro-capacitance sensor side voltage S point at the rear t Real-time Collection of apparatus of the present invention operation that () controls and intelligent flexible transmit the reactance value of transmission line electric capacity between series compensation device mounting points m;

$P(t-1)=P_s(t-1)=-P_r(t-1)=\frac{{\left|\stackrel{\‾}{V}(t-1)\right|}^2}{X_L(t-1)[1-R(t-1)]}\sin \mathrm{\δ}(t-1)=\frac{{\left|{\stackrel{\‾}{V}}_s(t-1)\right|}^2}{2[1-R_s(t-1)]\frac{X_s(t-1)}{2}}\sin {\mathrm{\δ}}_s(t-1)---\left(2\right)$

In formula (2): the flexible active-power P (t-1) of real time bidirectional flowing is the maximum adopting flexible transfer active power on transmission line after apparatus of the present invention the t-1 moment, P _s(t-1) be the flexibility series connection active power that t-1 moment micro-capacitance sensor is sent to bulk power grid through apparatus of the present invention, P _r(t-1) be the flexibility series connection active power that t-1 moment bulk power grid absorbs from micro-capacitance sensor through apparatus of the present invention; the runtime value of voltage vector on t-1 moment transmission line, δ _s(t-1) the micro-capacitance sensor high-pressure side equivalent voltage vector of S point Real-time Collection is engraved in when being t-1 after apparatus of the present invention adopt with bulk power grid side voltage vector between angle, the reactance value of transmission line between the micro-capacitance sensor side voltage S point of t-1 moment Real-time Collection after apparatus of the present invention adopt and the intermediate point m of transmission line, x _l(t-1) be transmission line inductive reactance value jX between t-1 moment micro-capacitance sensor to bulk power grid _l(t-1) amplitude; X _c(t-1) be transmission line between t-1 moment micro-capacitance sensor to the bulk power grid capacity reactance value-jX after apparatus of the present invention compensate _c(t-1) amplitude; R (t-1) is the penalty coefficient of transmission line after apparatus of the present invention compensate between t-1 moment micro-capacitance sensor to bulk power grid, 0≤R (t-1)≤1; R _s(t-1) be the penalty coefficient that after apparatus of the present invention are run, the micro-capacitance sensor side voltage S point of t Real-time Collection and intelligent flexible transmit transmission line reactance value between series compensation device mounting points m, x _cs(t-1) be through micro-capacitance sensor side bidirectional thyristor switch control rule series compensation capacitor circuit TSSC _s(t-1) the micro-capacitance sensor side voltage S point at the rear t-1 moment Real-time Collection of apparatus of the present invention operation controlled and intelligent flexible transmit the reactance value of transmission line electric capacity between series compensation device mounting points m;

$Q_c\left(t\right)=Q_s\left(t\right)=-Q_r\left(t\right)---\left(3\right)$

$=\frac{2{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{X_L\left(t\right)}*\frac{R\left(t\right)}{{[1-R\left(t\right)]}^2}*(1-\cos \mathrm{\δ}\left(t\right))$

$=\frac{{\left|{\stackrel{\‾}{V}}_s\left(t\right)\right|}^2}{\frac{X_s\left(t\right)}{2}}*\frac{R_s\left(t\right)}{{[1-R_s\left(t\right)]}^2}*(1-\cos {\mathrm{\δ}}_s\left(t\right))$

In formula (3): Q _c(t) be apparatus of the present invention when running t compensate in transmission line can the reactive power of two-way series flexible transfer, Q _st () is the flexible reactive power power that after apparatus of the present invention are run, t micro-capacitance sensor is sent to bulk power grid, Q _rt () is the flexible reactive power power that after apparatus of the present invention are run, t bulk power grid absorbs from micro-capacitance sensor;

$Q_c(t-1)=Q_s(t-1)=-Q_r(t-1)$

$=\frac{2{\left|\stackrel{\‾}{V}(t-1)\right|}^2}{X_L(t-1)}*\frac{R(t-1)}{{[1-R(t-1)]}^2}*(1-\cos \mathrm{\δ}(t-1))---\left(4\right)$

$=\frac{{\left|{\stackrel{\‾}{V}}_s(t-1)\right|}^2}{\frac{X_s(t-1)}{2}}*\frac{R_s(t-1)}{{[1-R_s(t-1)]}^2}*(1-\cos {\mathrm{\δ}}_s(t-1))$

In formula (4): Q _c(t-1) be apparatus of the present invention when running the t-1 moment compensate in transmission line can the reactive power of two-way series flexible transfer, Q _s(t-1) be the flexible reactive power power that after apparatus of the present invention are run, t-1 moment micro-capacitance sensor is sent to bulk power grid, Q _r(t-1) be the flexible reactive power power that after apparatus of the present invention are run, t-1 moment bulk power grid absorbs from micro-capacitance sensor;

Pass through pulse width modulation controlled integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit with intelligent flexible transmission series compensation device, make intelligent flexible transmit series compensation device equivalent current vector the equivalent voltage vector of intelligent flexible transmission series compensation device four quadrant running, namely angle and amplitude constantly change, thus control micro-capacitance sensor equivalence high side voltage vector micro-capacitance sensor high-pressure side equivalent voltage vector with bulk power grid voltage vector between angle δ _sthe amplitude of (t) and angle; With the series compensation capacitor circuit (TSSCs (t)) of micro-capacitance sensor side bidirectional thyristor switch control rule control intelligent flexible transmission series compensation device run after the micro-capacitance sensor side voltage S point of t Real-time Collection and intelligent flexible transmit the penalty coefficient R of transmission line reactance value between series compensation device mounting points m _s(t), thus control the transmission line reactance between micro-capacitance sensor to transmission line intermediate point m place amplitude according to micro-capacitance sensor high-pressure side equivalent voltage vector micro-capacitance sensor high-pressure side equivalent voltage vector with bulk power grid side voltage vector between angle δ _stransmission line reactance between (t) and micro-capacitance sensor to transmission line intermediate point m place calculate active-power P _s(t) and reactive power Q _s(t), and to its compensated solve in transmission line occur Unified Power Flow, low voltage crossing ability to bear weakness problem, according to micro-capacitance sensor side t and the active power difference Δ P in t-1 moment _s(t)=P _s(t)-P _sand reactive power difference Δ Q (t-1) _s(t)=Q _s(t)-Q _sand bulk power grid side t and t-1 moment active power difference Δ P (t-1) _r(t)=P _r(t)-P _rand reactive power difference Δ Q (t-1) _r(t)=Q _r(t)-Q _r(t-1), and according to detecting from micro-capacitance sensor side and bulk power grid side the parameter information obtained, active power regulation controlled quentity controlled variable Δ P (t)=Δ P is formed _s(t)-Δ P _r(t) and reactive power regulable control amount Δ Q (t)=Δ Q _s(t)-Δ Q _rt (), realizes flexible active-power P _s(t) and flexible reactive power power Q _sthe control of (t).

Owing to present invention employs technique scheme, compared with background technology, there is following good effect.

1, replace with the series compensation capacitor circuit (TSSC (t)) of t micro-capacitance sensor side bidirectional thyristor switch control rule between micro-capacitance sensor and bulk power grid series compensation capacitor circuit (TCSC (t)) (as shown in Figure 1) of the t micro-capacitance sensor side bidirectional thyristor control often used in paralleling compensating device, because TCSC (t) regulates change slowly to the reactance of transmission line, adjustable range is little, when bidirectional thyristor conducting, inductive reactance in TCSC (t) control unit and Capacitance parallel connection, reactance adjustable range total in transmission line is like this not remarkable, and the active power in transmission line, the transmission of reactive power is directly related with the reactance in transmission line, for TSSC (t) when bidirectional thyristor conducting, electric capacity in TSSC (t) control unit is by short circuit, total reactance adjustable range in such transmission line is remarkable, and then to transmission line active power, the transmission of reactive power has comparatively fast and larger impact, as as shown in dotted line frame in Fig. 3, as bidirectional thyristor SCR1, during SCR2 conducting, t capacity reactance-jX _sCt () is shorting out, when SCR1, SCR2 disconnect, and t capacity reactance-jX _sCt () is dropped into (as shown in dotted line frame in Fig. 3) completely, total reactance like this from S point to m point just there occurs obvious change, thus solves the low voltage crossing ability to bear weakness that paralleling compensating device produces when transmission line breaks down instantaneously and the Unified Power Flow problem occurred instantaneously.

2, for paralleling compensating device, the voltage that its device produces is connected in transmission line intermediate point m in parallel, even like this paralleling compensating device can produce four quadrant running voltage and current but to the control of transmission line power delivery with regulate slower, namely the adjustable range of paralleling compensating device to current/voltage is little, governing speed is slow, it is only applicable to the adjustment of transmission line voltage fluctuation and electric power transmission bottleneck, for the Unified Power Flow problem occurred in circuit, though paralleling compensating device can produce the voltage of advanced transmission line, but because paralleling compensating device regulates slowly, adjustable range is little, the fluctuation even off-grid operation that will cause frequency when supporting mutually is needed like this between micro-capacitance sensor and bulk power grid, because integrated gate commutated thyristor IGCT five-level switch magnetic topological circuit is directly serially connected with the intermediate point m(of transmission line as shown in Figure 1 by apparatus of the present invention), therefore apparatus of the present invention can produce rapidly the voltage of advanced transmission line, when there is Unified Power Flow problem, the transmission of active power can be controlled fast to the two ends of transmission line, thus solve the weakness of shunting means in Unified Power Flow problem.

3, the low voltage crossing problem paralleling compensating device caused because of transmission line catastrophic failure does not have obvious regulating action because governing speed is slow, not easily reaches to maintain micro-capacitance sensor when transmission line voltage drop is low to moderate 20% rated value and still adhere to running the requirement of 625ms, and apparatus of the present invention are because be directly serially connected with the intermediate point m(of transmission line as shown in Figure 1 and Figure 2 by IGCT five-level switch magnetic topological circuit), therefore apparatus of the present invention produce electric current, voltage-regulation speed is fast, adjustable range is large, the amplitude of generation current, voltage and phase angle can change arbitrarily, for low voltage crossing problem, apparatus of the present invention can send a large amount of reactive powers, still adhere to running 625ms to maintain micro-capacitance sensor when transmission line voltage drop is low to moderate 20% rated value, because apparatus of the present invention are intermediate point m IGCT five-level switch magnetic topological circuit being directly serially connected with transmission line, the electric current that apparatus of the present invention produce, voltage can four quadrant running, and adjustable range is large, governing speed is fast, a large amount of reactive powers can be sent to transmission line instantaneous, the control of reactive power size is decided by the penalty coefficient of transmission line, compare with paralleling compensating device, one of apparatus of the present invention feature is the introduction of the concept of Reactive Compensation Factor, when penalty coefficient is less than 0.5, the reactive power that apparatus of the present invention send can be greater than more than the reactive power twice that paralleling compensating device sends, advantage more obvious than paralleling compensating device can be played like this when solving low voltage crossing problem.

Accompanying drawing explanation

Fig. 1 is the structure principle chart of apparatus of the present invention;

Fig. 2 is apparatus of the present invention equivalent circuit diagrams;

Fig. 3 is micro-capacitance sensor side bidirectional thyristor switch control rule series compensation capacitor (TSSCs (t)) schematic circuit diagram;

Fig. 4 is micro-capacitance sensor and the schematic circuit diagram of bulk power grid after apparatus of the present invention are connected;

Fig. 5 is micro-capacitance sensor and the reactance-controlled circuit figure of bulk power grid after apparatus of the present invention are connected;

Fig. 6 is micro-capacitance sensor and bulk power grid equivalent current voltage vector diagram when apparatus of the present invention are connected;

Fig. 7 is that intelligent flexible transmission Series Compensated Transmission Lines is gained merit, the load angle characteristic figure of reactive power;

Fig. 8 be Unified Power Flow system both sides voltage equal time current/voltage vector circuitry figure;

Fig. 9 be Unified Power Flow system both sides voltage equal time through apparatus of the present invention control equivalent circuit diagram;

Figure 10 be Unified Power Flow system both sides voltage equal time through apparatus of the present invention control voltage trace vectogram;

Figure 11 be Unified Power Flow system both sides voltage magnitude not wait time through apparatus of the present invention control power transfer circuitry figure;

Figure 12 be Unified Power Flow system both sides voltage magnitude not wait time through apparatus of the present invention control voltage trace vectogram;

The equivalent circuit diagram that Figure 13 is transmission line both sides voltage when being arbitrary value after apparatus of the present invention control;

Figure 14 is micro-capacitance sensor and bulk power grid voltage controls after-current voltage trace vectogram through apparatus of the present invention when being arbitrary value;

Figure 15 is micro-capacitance sensor and bulk power grid voltage when being arbitrary value after apparatus of the present invention control current/voltage running orbit vectogram during active power minimax;

Figure 16 is micro-capacitance sensor and bulk power grid voltage when being arbitrary value after apparatus of the present invention control current/voltage running orbit vectogram during reactive power minimax.

Embodiment

As shown in Figure 1, the micro-capacitance sensor in the present embodiment and bulk power grid high-voltage intelligent flexible transmission serial connection compensation, it comprises micro-capacitance sensor side mixed active electric power dynamic filter circuit (HAPDF _s(t)) 1, micro-capacitance sensor side electrical parameter detection circuit (TMS320F28335, TI, A/D) 2, micro-capacitance sensor side power comparison circuit 3, micro-capacitance sensor side power difference circuit 4, integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit 5, integrated gate commutated thyristor (IGCT) switch driving circuit 6, intelligent flexible transmission series compensation device DSP control circuit (TMS320F28335, TI) 7, bulk power grid side electrical parameter detection circuit (TMS320F28335, TI, A/D) 8, bulk power grid side power comparison circuit 9, bulk power grid side power difference circuit 10 and bulk power grid side mixed active electric power dynamic filter circuit (HAPDF _r(t)) 11, wherein: it also comprises the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) 12 and the series compensation capacitor circuit (TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)) 13,

Mixed active electric power kinetic filter circuit (HAPDF _s(t)) input and output of 1 upper end and communication port be at micro-capacitance sensor bus S point and micro-capacitance sensor high-pressure side equivalent voltage vector Upper end, the input port, upper end of micro-capacitance sensor side electrical parameter detection circuit 2, transmission line of electricity micro-capacitance sensor side reactance between micro-capacitance sensor to the intermediate point m of transmission line of electricity Left end be connected, its function system carries out Quick reactive-load compensation and harmonic management in t, HAPDF _s(t) 1 lower end input and output and communication port and intelligent flexible transmission series compensation device DSP control circuit 7 arrange HAPDF _sT the corresponding input and output of () circuit 1 and communication port are connected, its function is to make control in t real-time exchange information; The input port, upper end of micro-capacitance sensor side electrical parameter detection circuit 2 micro-capacitance sensor bus S point with Upper end, HAPDF _sThe input and output of (t) circuit 1 upper end and communication port, the side reactance of transmission line of electricity micro-capacitance sensor Left end be connected;The lower end delivery outlet of micro-capacitance sensor side electrical parameter detection circuit 2 is connected with the input port, upper end of micro-capacitance sensor side power comparison circuit 3, the right-hand member input and output of micro-capacitance sensor side electrical parameter detection circuit 2 and communication port are connected to the corresponding input and output of micro-capacitance sensor side electrical parameter detection circuit 2 and the communication port of intelligent flexible transmission series compensation device DSP control circuit 7, and its function detects micro-capacitance sensor high-pressure side equivalent voltage vector in t δ _s(t) and Parameter, It is Amplitude, δ _sT () is the micro-capacitance sensor high-pressure side equivalent voltage vector of t at S point Real-time Collection With bulk power grid side voltage vector Between angle, micro-capacitance sensor side electrical parameter detection circuit 2 is except the real-time above parameter of detection, and calculates the flexible active-power P of micro-capacitance sensor side t _s(t), t flexible reactive power power Q _s(t), t-1 moment flexible active-power P _sAnd t-1 moment flexible reactive power power Q (t-1) _s(t-1), result of calculation is sent into micro-capacitance sensor side power comparison circuit 3 and intelligent flexible transmission series compensation device dsp controller circuit 7; The input port, upper end of micro-capacitance sensor side power comparison circuit 3 is connected with the lower end delivery outlet of micro-capacitance sensor side electrical parameter detection circuit 2, the lower end delivery outlet of micro-capacitance sensor side power comparison circuit 3 is connected with the input port, upper end of micro-capacitance sensor side power difference circuit 4, and its function is power P t calculated _s(t), Q _sT power P that () and (t-1) moment calculate _s(t-1), Q _s(t-1) result sends into micro-capacitance sensor side power difference circuit 4; The input port, upper end of micro-capacitance sensor side power difference circuit 4 is connected with power comparison circuit 3 lower end, micro-capacitance sensor side delivery outlet, the lower end delivery outlet of micro-capacitance sensor side power difference circuit 4 is connected to the corresponding input and output of micro-capacitance sensor side power difference circuit 4 and the communication port of intelligent flexible transmission series compensation device DSP control circuit 7, and its function is active power difference Δ P t and t-1 moment calculated _s(t) and reactive power difference Δ Q _sT () sends into intelligent flexible transmission series compensation device DSP control circuit 7; The left end of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit 5 and the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) 12 right-hand member be connected,The right-hand member of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit 5 and the series compensation capacitor circuit (TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)) 13 left end be connected, the lower end of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit 5 is connected with the upper end of integrated gate commutated thyristor (IGCT) switch driving circuit 6, by the operation to integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit, to control the difference P (t) of intermediate point m both sides active power and the difference DELTA Q (t) of reactive power of transmission line of electricity, thus solve the Unified Power Flow of electric power transmission, the problem of low voltage crossing ability to bear weakness, the upper end of integrated gate commutated thyristor (IGCT) switch driving circuit 6 is connected with the lower end of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit 5, the lower end of integrated gate commutated thyristor (IGCT) switch driving circuit 6 is connected with the corresponding input and output of integrated gate commutated thyristor (IGCT) switch driving circuit 6 and the communication port of intelligent flexible transmission series compensation device DSP control circuit 7, its function is under intelligent flexible transmits the control of series compensation device DSP control circuit 7, IGCT switch in integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit 5 is operated, the input and output of integrated gate commutated thyristor (IGCT) switch driving circuit 6 that intelligent flexible transmission series compensation device DSP control circuit 7 is arranged and communication port are connected with the lower end of integrated gate commutated thyristor (IGCT) switch driving circuit 6, the micro-capacitance sensor side bidirectional thyristor switch control rule series compensation capacitor circuit (TSSC that intelligent flexible transmission series compensation device DSP control circuit 7 is arranged _s(t)) 12 input and output and communication port and micro-capacitance sensor side bidirectional thyristor switch control rule series compensation capacitor circuit (TSSC _s(t)) 12 lower end connect, the input and output of the micro-capacitance sensor side electrical parameter detection circuit 2 that intelligent flexible transmission series compensation device DSP control circuit 7 is arranged and communication port are connected with micro-capacitance sensor side electrical parameter detection circuit 2, the input and output of the micro-capacitance sensor side power difference circuit 4 that intelligent flexible transmission series compensation device DSP control circuit 7 is arranged and communication port are connected with micro-capacitance sensor side power difference circuit 4, the HAPDF that intelligent flexible transmission series compensation device DSP control circuit 7 is arranged _sthe input and output of (t) circuit 1 and communication port and HAPDF _st () circuit 1 is connected, the series compensation capacitor circuit (TSSC of the bulk power grid side bidirectional thyristor switch control rule that intelligent flexible transmission series compensation device DSP control circuit 7 is arranged _R(t)) input and output of 13 and the series compensation capacitor circuit (TSSC of communication port and bulk power grid side bidirectional thyristor switch control rule _r(t)) 13 lower end connect, the input and output of the bulk power grid side electrical parameter detection circuit 8 that intelligent flexible transmission series compensation device DSP control circuit 7 is arranged and communication port are connected with bulk power grid side electrical parameter detection circuit 8, the input and output of the bulk power grid side power difference circuit 10 that intelligent flexible transmission series compensation device DSP control circuit 7 is arranged and communication port are connected with the lower end delivery outlet of bulk power grid side power difference circuit 10, the HAPDF that intelligent flexible transmission series compensation device DSP control circuit 7 is arranged _rThe input and output of (t) circuit 11 and communication port and HAPDF _rT the lower end of () circuit 11 is connected, function one is the power difference Δ P comparing micro-capacitance sensor and bulk power grid side t and (t-1) moment _s(t), Δ Q _s(t), Δ P _r(t) and Δ Q _r(t), and according to the parameter information obtained from micro-capacitance sensor side electrical parameter detection circuit 2 and bulk power grid side electrical parameter detection circuit 8, form power adjusting controlled quentity controlled variable Δ P (t) and Δ Q (t), and to IGCT switch driving circuit 6 send dynamic control signal with solve transmission line of electricity occurs electric power transmission Unified Power Flow, low voltage crossing ability to bear weakness problem, function two is real-time and HAPDF _s(t) circuit 1, HAPDF _r(t) circuit 11, TSSC _s(t) circuit 12 and TSSC _rT () circuit 13 communication, coordinates exchange information to administer any humorous wave interference entering bulk power grid and micro-capacitance sensor, and the transmission line of electricity reactance of transmission line of electricity in m point both sides is controlled in real time; The input port of electrical parameter detection circuit 8 upper end, bulk power grid side is at bulk power grid bus r point and bulk power grid side voltage vector Upper end,HAPDF _rThe input and output of (t) circuit 11 upper end and communication port, the side reactance of transmission line of electricity bulk power grid Right-hand member be connected, the delivery outlet of electrical parameter detection circuit 8 lower end, bulk power grid side is connected with the input port, upper end of bulk power grid side power comparison circuit 9, the right-hand member input and output of bulk power grid side electrical parameter detection circuit 8 and communication port are connected with input and output and the communication port of the bulk power grid side electrical parameter detection circuit 8 of intelligent flexible transmission series compensation device dsp controller circuit 7, and its function detects bulk power grid side voltage vector in t δ _r(t) and Parameter, It is Amplitude, δ _rT () is the bulk power grid side voltage vector of t at r point Real-time Collection With micro-capacitance sensor high-pressure side equivalent voltage vector Between angle, bulk power grid side electrical parameter detection circuit 8 is except the real-time above parameter of detection, and calculates the flexible active-power P of bulk power grid side t _r(t), t flexible reactive power power Q _r(t), t-1 moment flexible active-power P _rAnd t-1 moment flexible reactive power power Q (t-1) _r(t-1), result of calculation is sent into bulk power grid side power comparison circuit 9 and intelligent flexible transmission series compensation device dsp controller circuit 7; The input port, upper end of bulk power grid side power comparison circuit 9 is connected with the lower end delivery outlet of bulk power grid side electrical parameter detection circuit 8, the lower end delivery outlet of bulk power grid side power comparison circuit 9 is connected with the input port, upper end of bulk power grid side power difference circuit 10, and its function is power P t calculated _r(t), Q _rT power P that () and (t-1) moment calculate _r(t-1), Q _r(t-1) result sends into bulk power grid side power difference circuit 10; The input port, upper end of bulk power grid side power difference circuit 10 is connected with power comparison circuit 9 lower end, bulk power grid side delivery outlet, the lower end delivery outlet of bulk power grid side power difference circuit 10 and intelligent flexible transmit the input and output of the bulk power grid side power difference circuit 10 of series compensation device dsp controller circuit 7 and communication port is connected, its function be t and t-1 moment are calculated active power, reactive power difference DELTA P _r(t), Δ Q _RT () sends into intelligent flexible transmission series compensation device DSP control circuit 7; HAPDF _rT the upper end input and output of () circuit 11 and communication port are at bulk power grid bus r point and bulk power grid side voltage vector Upper end, the input port, upper end of bulk power grid side electrical parameter detection circuit 8, transmission line of electricity reactance between bulk power grid to the intermediate point m place of transmission line of electricity Right-hand member be connected, its function system carries out Quick reactive-load compensation and harmonic management in t, HAPDF _rThe HAPDF of the input and output of the lower end of (t) circuit 11 and communication port and intelligent flexible transmission series compensation device dsp controller circuit 7 _rT the input and output of () circuit 11 and communication port are connected, its function is that to make, control determines in t real-time exchange information; Series compensation capacitor circuit (the TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) 12 left end and the side reactance of transmission line of electricity micro-capacitance sensor Right-hand member connect, the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) 12 lower end and the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule that arranges of intelligent flexible transmission series compensation device dsp controller circuit 7 _s(t)) input and output and communication port connect,Series compensation capacitor circuit (the TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) right-hand member of 12 is connected with the left end of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit 5, and its function passes through TSSC in t _sThe control of (t) make micro-capacitance sensor to the intermediate point m place of transmission line of electricity reactance value by Control to Series compensation capacitor circuit (the TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)) 13 right-hand member and the side reactance of transmission line of electricity bulk power grid Left end connect, the series compensation capacitor circuit (TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)) lower end and the series compensation capacitor circuit (TSSC of bulk power grid side bidirectional thyristor switch control rule that arranges of intelligent flexible transmission series compensation device dsp controller circuit 7 _r(t)) input and output and communication port connect, the series compensation capacitor circuit (TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)) left end of 13 is connected with the right-hand member of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit 5, and its function passes through TSSC in t _rThe control of (t) make bulk power grid to the intermediate point m place of transmission line of electricity reactance value by Control to

The control method of above-mentioned micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation, first it set up the line reactance X at flexible active-power P (t) that in micro-capacitance sensor and bulk power grid connection line, real time bidirectional flows, flexible reactive power power Q (t) and transmission line two ends _lthe micro-capacitance sensor high-pressure side equivalent voltage vector at (t), transmission line two ends the bulk power grid side voltage vector at transmission line two ends with micro-capacitance sensor high-pressure side equivalent voltage vector between voltage vector angle and power angle δ (t), computation model between transmission line between t micro-capacitance sensor to bulk power grid penalty coefficient R (t) after apparatus of the present invention compensate:

$P\left(t\right)=P_s\left(t\right)=-P_r\left(t\right)=\frac{{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{X_L\left(t\right)[1-R\left(t\right)]}\sin \mathrm{\δ}\left(t\right)=\frac{{\left|{\stackrel{\‾}{V}}_s\left(t\right)\right|}^2}{2[1-R_s\left(t\right)]\frac{X_s\left(t\right)}{2}}\sin {\mathrm{\δ}}_s\left(t\right)---\left(1\right)$

In formula (1): the flexible active-power P (t) of real time bidirectional flowing is the maximum that t adopts flexible transfer active power on transmission line after apparatus of the present invention, P _st () is the flexibility series connection active power that t micro-capacitance sensor is sent to bulk power grid through apparatus of the present invention, P _rt () is the flexibility series connection active power that t bulk power grid absorbs from micro-capacitance sensor through apparatus of the present invention; the runtime value of voltage vector on t transmission line, δ _st () is that after apparatus of the present invention adopt, t is vectorial at the micro-capacitance sensor high-pressure side equivalent voltage of S point Real-time Collection with bulk power grid side voltage vector between angle, the reactance value of transmission line between the micro-capacitance sensor side voltage S point of t Real-time Collection after apparatus of the present invention adopt and the intermediate point m of transmission line, x _lt () is the transmission line inductive reactance value jX between t micro-capacitance sensor to bulk power grid _lthe amplitude of (t); X _ct () is the capacity reactance value-jX of transmission line after apparatus of the present invention compensate between t micro-capacitance sensor to bulk power grid _cthe amplitude of (t); R (t) is the penalty coefficient of transmission line after apparatus of the present invention compensate between t micro-capacitance sensor to bulk power grid, 0≤R (t)≤1; R _st () is the penalty coefficient that after apparatus of the present invention are run, the micro-capacitance sensor side voltage S point of t Real-time Collection and intelligent flexible transmit transmission line reactance value between series compensation device mounting points m, x _cst () is through micro-capacitance sensor side bidirectional thyristor switch control rule series compensation capacitor circuit TSSC _sthe t micro-capacitance sensor side voltage S point at the rear t Real-time Collection of apparatus of the present invention operation that () controls and intelligent flexible transmit the reactance value of transmission line electric capacity between series compensation device mounting points m;

$P(t-1)=P_s(t-1)=-P_r(t-1)=\frac{{\left|\stackrel{\‾}{V}(t-1)\right|}^2}{X_L(t-1)[1-R(t-1)]}\sin \mathrm{\δ}(t-1)=\frac{{\left|{\stackrel{\‾}{V}}_s(t-1)\right|}^2}{2[1-R_s(t-1)]\frac{X_s(t-1)}{2}}\sin {\mathrm{\δ}}_s(t-1)---\left(2\right)$

In formula (2): the flexible active-power P (t-1) of real time bidirectional flowing is the maximum adopting flexible transfer active power on transmission line after apparatus of the present invention the t-1 moment, P _s(t-1) be the flexibility series connection active power that t-1 moment micro-capacitance sensor is sent to bulk power grid through apparatus of the present invention, P _r(t-1) be the flexibility series connection active power that t-1 moment bulk power grid absorbs from micro-capacitance sensor through apparatus of the present invention; the runtime value of voltage vector on t-1 moment transmission line, δ _s(t-1) the micro-capacitance sensor high-pressure side equivalent voltage vector of S point Real-time Collection is engraved in when being t-1 after apparatus of the present invention adopt with bulk power grid side voltage vector between angle, the reactance value of transmission line between the micro-capacitance sensor side voltage S point of t-1 moment Real-time Collection after apparatus of the present invention adopt and the intermediate point m of transmission line, x _l(t-1) be transmission line inductive reactance value jX between t-1 moment micro-capacitance sensor to bulk power grid _l(t-1) amplitude; X _c(t-1) be transmission line between t-1 moment micro-capacitance sensor to the bulk power grid capacity reactance value-jX after apparatus of the present invention compensate _c(t-1) amplitude; R (t-1) is the penalty coefficient of transmission line after apparatus of the present invention compensate between t-1 moment micro-capacitance sensor to bulk power grid, 0≤R (t-1)≤1; R _s(t-1) be the penalty coefficient that after apparatus of the present invention are run, the micro-capacitance sensor side voltage S point of t Real-time Collection and intelligent flexible transmit transmission line reactance value between series compensation device mounting points m, x _cs(t-1) be through micro-capacitance sensor side bidirectional thyristor switch control rule series compensation capacitor circuit TSSC _s(t-1) the micro-capacitance sensor side voltage S point at the rear t-1 moment Real-time Collection of apparatus of the present invention operation controlled and intelligent flexible transmit the reactance value of transmission line electric capacity between series compensation device mounting points m;

$Q_c\left(t\right)=Q_s\left(t\right)=-Q_r\left(t\right)---\left(3\right)$

$=\frac{2{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{X_L\left(t\right)}*\frac{R\left(t\right)}{{[1-R\left(t\right)]}^2}*(1-\cos \mathrm{\δ}\left(t\right))$

$=\frac{{\left|{\stackrel{\‾}{V}}_s\left(t\right)\right|}^2}{\frac{X_s\left(t\right)}{2}}*\frac{R_s\left(t\right)}{{[1-R_s\left(t\right)]}^2}*(1-\cos {\mathrm{\δ}}_s\left(t\right))$

In formula (3): Q _c(t) be apparatus of the present invention when running t compensate in transmission line can the reactive power of two-way series flexible transfer, Q _st () is the flexible reactive power power that after apparatus of the present invention are run, t micro-capacitance sensor is sent to bulk power grid, Q _rt () is the flexible reactive power power that after apparatus of the present invention are run, t bulk power grid absorbs from micro-capacitance sensor;

$Q_c(t-1)=Q_s(t-1)=-Q_r(t-1)$

$=\frac{2{\left|\stackrel{\‾}{V}(t-1)\right|}^2}{X_L(t-1)}*\frac{R(t-1)}{{[1-R(t-1)]}^2}*(1-\cos \mathrm{\δ}(t-1))---\left(4\right)$

$=\frac{{\left|{\stackrel{\‾}{V}}_s(t-1)\right|}^2}{\frac{X_s(t-1)}{2}}*\frac{R_s(t-1)}{{[1-R_s(t-1)]}^2}*(1-\cos {\mathrm{\δ}}_s(t-1))$

In formula (4): Q _c(t-1) be apparatus of the present invention when running the t-1 moment compensate in transmission line can the reactive power of two-way series flexible transfer, Q _s(t-1) be the flexible reactive power power that after apparatus of the present invention are run, t-1 moment micro-capacitance sensor is sent to bulk power grid, Q _r(t-1) be the flexible reactive power power that after apparatus of the present invention are run, t-1 moment bulk power grid absorbs from micro-capacitance sensor;

Pass through pulse width modulation controlled integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit with intelligent flexible transmission series compensation device, make intelligent flexible transmit series compensation device equivalent current vector the equivalent voltage vector of intelligent flexible transmission series compensation device four quadrant running, namely angle and amplitude constantly change, thus control micro-capacitance sensor equivalence high side voltage vector micro-capacitance sensor high-pressure side equivalent voltage vector with bulk power grid voltage vector between angle δ _sthe amplitude of (t) and angle; With the series compensation capacitor circuit (TSSCs (t)) of micro-capacitance sensor side bidirectional thyristor switch control rule control intelligent flexible transmission series compensation device run after the micro-capacitance sensor side voltage S point of t Real-time Collection and intelligent flexible transmit the penalty coefficient R of transmission line reactance value between series compensation device mounting points m _s(t), thus control the transmission line reactance between micro-capacitance sensor to transmission line intermediate point m place amplitude according to micro-capacitance sensor high-pressure side equivalent voltage vector micro-capacitance sensor high-pressure side equivalent voltage vector with bulk power grid side voltage vector between angle δ _stransmission line reactance between (t) and micro-capacitance sensor to transmission line intermediate point m place calculate active-power P _s(t) and reactive power Q _s(t), and to its compensated solve in transmission line occur Unified Power Flow, low voltage crossing ability to bear weakness problem, according to micro-capacitance sensor side t and the active power difference Δ P in t-1 moment _s(t)=P _s(t)-P _sand reactive power difference Δ Q (t-1) _s(t)=Q _s(t)-Q _sand bulk power grid side t and t-1 moment active power difference Δ P (t-1) _r(t)=P _r(t)-P _rand reactive power difference Δ Q (t-1) _r(t)=Q _r(t)-Q _r(t-1), and according to detecting from micro-capacitance sensor side and bulk power grid side the parameter information obtained, active power regulation controlled quentity controlled variable Δ P (t)=Δ P is formed _s(t)-Δ P _r(t) and reactive power regulable control amount Δ Q (t)=Δ Q _s(t)-Δ Q _rt (), realizes flexible active-power P _s(t) and flexible reactive power power Q _sthe control of (t).

In transmission line, Unified Power Flow problem is now the amplitude of two voltages is identical, phase angle is identical, and namely in transmission line, electric current and active power are 0, or are amplitude does not wait but direction is identical, active power is not now had to flow in transmission line, low voltage crossing problem be break down in circuit and voltage drop is low to moderate 20% burning voltage time micro-capacitance sensor should hold on and run 625ms, the key solving Unified Power Flow and low voltage crossing problem is the active power and reactive power that how to control to flow through in transmission line, therefore with intelligent flexible transmission series compensation device by pulse width modulation controlled IGCT five-level switch magnetic topological circuit, make intelligent flexible transmit series compensation device equivalent current vector the equivalent voltage vector of intelligent flexible transmission series compensation device four quadrant running, namely angle and amplitude constantly change, thus control micro-capacitance sensor equivalence high side voltage vector micro-capacitance sensor high-pressure side equivalent voltage vector with bulk power grid voltage vector between angle δ _sthe amplitude of (t) and angle; With the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) the penalty coefficient R of transmission line reactance value between series compensation device mounting points m is transmitted by the micro-capacitance sensor side voltage S point of t Real-time Collection after controlling intelligent flexible transmission series compensation device and running and intelligent flexible _st () controls the transmission line reactance between micro-capacitance sensor to transmission line intermediate point m place amplitude just because of r _s(t) and acting in conjunction create voltage vector advanced two equal voltage vector values angle δ (t) or in advance with angle δ (t) that the identical but amplitude in direction does not wait, because the appearance at δ (t) angle makes voltage vector is advanced can be by to conveying active power, thus solve the equal Unified Power Flow problem of transmission line both end voltage and on transmission line, produce the meritorious of bidirectional flexible transmission and reactive power; the maximum of active power occurs in merit angle δ (t)=90 °, penalty coefficient R (t)=0 in traditional power-angle curve, and now its value is due to the regulating action of penalty coefficient R (t) in intelligent flexible transmission series compensation device, when penalty coefficient R (t)=0.5, $P\left(t\right)=\frac{{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{X_L\left(t\right)[1-R\left(t\right)]}\sin \mathrm{\δ}\left(t\right)=2P_{\max }\left(t\right)=2\frac{{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{X_L\left(t\right)};$ Active power maximum rises in the power-angle curve after the adjustment of penalty coefficient R (t)=0.5 by traditional power-angle curve, now its power angle also occurs in δ (t)=90 ° and reaches maximum, active power adds twice, and now its value is obtain from formula (11) the maximum of reactive power when traditional power-angle curve is taken in penalty coefficient R (t)=0, Q _c(t)=0; Due to the regulating action of penalty coefficient R (t) in intelligent flexible transmission series compensation device, when penalty coefficient R (t)=0.5, when reactive power value is by R (t)=0, Q _ct ()=0, rise in the power-angle curve after regulating when penalty coefficient R (t)=0.5, now its power angle occurs in δ (t)=180 ° and reaches maximum, and reactive power creates transition, and now its value is

Below the present invention is described in further detail.

Set up the computing formula that apparatus of the present invention control:

${\stackrel{\‾}{V}}_s\left(t\right)=\left|\stackrel{\‾}{V}\left(t\right)\right|e^{\mathrm{j\δ}\left(t\right)/2}=\left|\stackrel{\‾}{V}\left(t\right)\right|(\cos \frac{\mathrm{\δ}\left(t\right)}{2}+j\sin \frac{\mathrm{\δ}\left(t\right)}{2})---\left(5\right)$

In formula (5), t with the equivalent voltage vector value of new forms of energy micro-capacitance sensor after step-up transformer of the regenerative resource compositions such as larger wind power plants and large-sized photovoltaic power station (35KV and more than), the runtime value of voltage vector on t transmission line, namely it is t amplitude, δ (t) is t micro-capacitance sensor high-pressure side equivalent voltage vector bulk power grid voltage vector and two voltage vector angles between voltage vector, i.e. power angle;

${\stackrel{\‾}{V}}_r\left(t\right)=\left|\stackrel{\‾}{V}\left(t\right)\right|e^{-\mathrm{j\δ}\left(t\right)/2}=\left|\stackrel{\‾}{V}\left(t\right)\right|(\cos \frac{\mathrm{\δ}\left(t\right)}{2}-j\sin \frac{\mathrm{\δ}\left(t\right)}{2})---\left(6\right)$

In formula (7), the middle point voltage vector value of the transmission line that t new forms of energy micro-capacitance sensor voltage is connected with bulk power grid voltage, all current/voltage vectors of the following stated be all with for benchmark, as shown in Figure 6; the runtime value of voltage vector on t transmission line, namely it is t amplitude, m point is the intermediate point of the transmission line that new forms of energy micro-capacitance sensor is connected with bulk power grid, is also the mounting points of intelligent flexible transmission series compensation device, before any fault and any fluctuation appear in system, the voltage of transmission line should be the working voltage of transmission line, then have $\left|{\stackrel{\‾}{V}}_s\left(t\right)\right|=\left|{\stackrel{\‾}{V}}_r\left(t\right)\right|=\left|{\stackrel{\‾}{V}}_m\left(t\right)\right|=\left|\stackrel{\‾}{V}\left(t\right)\right|;$

$R\left(t\right)=\frac{X_c\left(t\right)}{X_L\left(t\right)}---\left(8\right)$

X _eq(t)=X _L(t)-X _c(t)=X _L(t)[1-R(t)]（9）

In formula (8), (9), X _lt () is the transmission line inductive reactance value jX between t micro-capacitance sensor to bulk power grid _lthe amplitude of (t); X _ct () is the capacity reactance value-jX of transmission line after intelligent flexible transmission series compensation device compensates between t micro-capacitance sensor to bulk power grid _cthe amplitude of (t); R (t) is the penalty coefficient of transmission line after intelligent flexible transmission series compensation device compensates between t micro-capacitance sensor to bulk power grid, 0≤R (t)≤1; X _eqt () is the transmission line total reactance value of transmission line after intelligent flexible transmission series compensation device compensates between t micro-capacitance sensor to bulk power grid;

$\stackrel{\‾}{I}\left(t\right)=\frac{{\stackrel{\‾}{V}}_s\left(t\right)-{\stackrel{\‾}{V}}_r\left(t\right)-{\stackrel{\‾}{V}}_a\left(t\right)}{j{X}_{\mathrm{eq}}\left(t\right)}---\left(10\right)$

In formula (10), can the current vector of two-way flow in t transmission line, it is the equivalent voltage vector of the intelligent flexible transmission series compensation device that t is produced by five level IGCT switch topology circuits, because IGCT switch can control arbitrarily, with intelligent flexible transmission series compensation device by pulse width modulation controlled IGCT five-level switch magnetic topological circuit, make intelligent flexible transmit series compensation device equivalent current vector the equivalent voltage vector of intelligent flexible transmission series compensation device four quadrant running, namely angle and amplitude constantly change, so work as when diminishing:

${\left|\stackrel{\‾}{I}\left(t\right)\right|}^2=\frac{4{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{{[1-R\left(t\right)]}^2{X^2}_L\left(t\right)}{\sin }^2\left[\frac{\mathrm{\δ}\left(t\right)}{2}\right]---\left(12\right)$

$=\frac{4{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{{[1-R\left(t\right)]}^2{X^2}_L\left(t\right)}\left[\frac{1}{2}(1-\cos \mathrm{\δ}\left(t\right))\right]$

$=\frac{2{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{{[1-R\left(t\right)]}^2{X^2}_L\left(t\right)}(1-\cos \mathrm{\δ}\left(t\right))$

As shown in Figure 6:

$\left|{\stackrel{\‾}{V}}_{\mathrm{sm}}\left(t\right)\right|=\left|{\stackrel{\‾}{V}}_{\mathrm{mr}}\left(t\right)\right|=\left|\stackrel{\‾}{V}\left(t\right)\right|\cos \frac{\mathrm{\δ}\left(t\right)}{4}---\left(13\right)$

In formula (13), that t micro-capacitance sensor and intelligent flexible transmit the voltage magnitude of series compensation device between mounting points m, it is the t intelligent flexible transmission voltage magnitude of series compensation device between mounting points m and bulk power grid (as shown in Figure 6);

$\left|{\stackrel{\‾}{I}}_{\mathrm{sm}}\left(t\right)\right|=\left|{\stackrel{\‾}{I}}_{\mathrm{mr}}\left(t\right)\right|=\left|\stackrel{\‾}{I}\left(t\right)\right|=\frac{4\left|\stackrel{\‾}{V}\left(t\right)\right|}{X_L\left(t\right)}\sin \frac{\mathrm{\δ}\left(t\right)}{4}---\left(14\right)$

In formula (14), the current vector value that t micro-capacitance sensor and intelligent flexible transmit between series compensation device mounting points m in circuit, it is t current amplitude, the current vector value between t intelligent flexible transmission series compensation device mounting points m and bulk power grid in circuit, it is t current amplitude; it is t current vector amplitude (as shown in Figure 6);

$P\left(t\right)=P_s\left(t\right)=-P_r\left(t\right)=\left|{\stackrel{\‾}{V}}_m\left(t\right)\right|\left|\stackrel{\‾}{I}\left(t\right)\right|---\left(15\right)$

$=\left(\right|\stackrel{\‾}{V}\left(t\right)\left|\cos \frac{\mathrm{\δ}\left(t\right)}{2}\right)*\left(\frac{2\left|\stackrel{\‾}{V}\left(t\right)\right|}{[1-R\left(t\right)]X_L\left(t\right)}\sin \frac{\mathrm{\δ}\left(t\right)}{2}\right)$

$=\left|\stackrel{\‾}{V}\left(t\right)\right|\frac{2\stackrel{\‾}{V}\left(t\right)}{[1-R\left(t\right)]X_L\left(t\right)}\cos \frac{\mathrm{\δ}\left(t\right)}{2}\sin \frac{\mathrm{\δ}\left(t\right)}{2}$

$=\frac{{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{[1-R\left(t\right)]X_L\left(t\right)}*2*\left[\frac{1}{2}\sin \mathrm{\δ}\left(t\right)\right]$

$=\frac{{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{[1-R\left(t\right)]X_L\left(t\right)}\sin \mathrm{\δ}\left(t\right)$

$=\frac{{\left|{\stackrel{\‾}{V}}_s\left(t\right)\right|}^2}{2[1-R_s\left(t\right)]\frac{X_s\left(t\right)}{2}}\sin {\mathrm{\δ}}_s\left(t\right)$

Formula (1), formula (2) can be drawn by the derivation of formula (15).

$Q_c\left(t\right)=Q_s\left(t\right)=-Q_r\left(t\right)={\left|\stackrel{\‾}{I}\left(t\right)\right|}^2{X}_c\left(t\right)---\left(16\right)$

$={\left|\stackrel{\‾}{I}\left(t\right)\right|}^2*R\left(t\right)X_L\left(t\right)$

$=\frac{2{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{{[1-R\left(t\right)]}^2{X^2}_L\left(t\right)}*R\left(t\right)X_L\left(t\right)*(1-\cos \mathrm{\δ}\left(t\right))$

$=\frac{2{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{X_L\left(t\right)}*\frac{R\left(t\right)}{{[1-R\left(t\right)]}^2}*(1-\cos \mathrm{\δ}\left(t\right))$

$=\frac{{\left|{\stackrel{\‾}{V}}_s\left(t\right)\right|}^2}{\frac{X_s\left(t\right)}{2}}*\frac{R_s\left(t\right)}{{[1-R_s\left(t\right)]}^2}*(1-\cos {\mathrm{\δ}}_s\left(t\right))$

Formula (3), formula (4) can be drawn by the derivation of formula (16).

As shown in Figure 2, in figure t with the equivalent voltage vector value of new forms of energy micro-capacitance sensor after step-up transformer of the regenerative resource compositions such as larger wind power plants and large-sized photovoltaic power station (35KV and more than), t transmission line transmits the transmission line between series compensation device mounting points m inductive reactance value from micro-capacitance sensor to intelligent flexible, the current vector value flowed t transmission line transmits between series compensation device transmission line from micro-capacitance sensor to intelligent flexible, that t micro-capacitance sensor and bulk power grid transmit series compensation device in t equivalent voltage vector value through intelligent flexible, the current vector value flowed in the transmission line between t intelligent flexible transmission series compensation device mounting points m to bulk power grid, the inductive reactance value of the transmission line between t intelligent flexible transmission series compensation device mounting points m to bulk power grid, it is the voltage vector value of t bulk power grid; TSSC _st () is micro-capacitance sensor side bidirectional thyristor switch control rule series compensation capacitor circuit, TSSC _rt () is bulk power grid side bidirectional thyristor switch control rule series compensation capacitor circuit, negative pole and earth point and negative pole be connected, positive pole with left end be connected, right-hand member and TSSC _st the left end of () is connected, TSSC _sthe right-hand member of (t) with positive pole be connected; negative pole and TSSC _rt the left end of () is connected, TSSC _rthe right-hand member of (t) with left end be connected; right-hand member with positive pole be connected; negative pole and earth point and negative pole be connected; represent at device tie point m place voltage vector over the ground.

As shown in Figure 3, micro-capacitance sensor side bidirectional thyristor switch control rule series compensation capacitor circuit (TSSC _s(t)) be made up of several reactance control elements, each reactance control element is by building-out capacitor-jX _sCt (), thyristor SCR1 and thyristor SCR2 are formed, building-out capacitor-jX _sCthe negative pole of the positive pole of (t) and the positive pole of thyristor SCR1, thyristor SCR2 and right-hand member be connected, building-out capacitor-jX _sCt the negative pole of () is with the positive pole of the negative pole of thyristor SCR1, thyristor SCR2 and be connected with the left side of reactance control element adjacent on the right side of it; By TSSC _st (), for transmitting the control of total reactance value at series compensation device mounting points m place to intelligent flexible to micro-capacitance sensor, TSSC is passed through in its effect _st the control of () makes micro-capacitance sensor to total reactance value of intelligent flexible transmission series compensation device mounting points m place t value change, by TSSC _sthe control of (t), can by the inductive reactance value of this section of transmission line by control to with the size of value difference distance is completely by TSSC _st the reactance control element in () controls, to reach bulk power grid equivalent voltage vector the object controlled; In Fig. 3, S point is the equivalent electric pressure point of micro-capacitance sensor and transmission line tie point, it is the inductive reactance that micro-capacitance sensor and intelligent flexible transmit transmission line between series compensation device mounting points m, by the control to reactance control element, the reactance of this element can be made to operate in capacitance state to be compensated total reactance, and its micro-capacitance sensor side at t penalty coefficient is r _st () is the penalty coefficient of transmission line after intelligent flexible transmission series compensation device compensates between t micro-capacitance sensor to intelligent flexible transmission series compensation device mounting points m ,-jX _sCt () is the capacity reactance value in the transmission line dotted line frame between t micro-capacitance sensor to bulk power grid in inductive reactance control element, n is that t is put into operation by n capacity reactance, n=1,2,3 ... 20, X _sCt () is-jX _sCthe amplitude of (t), t transmission line transmits the transmission line between series compensation device mounting points m inductive reactance value from micro-capacitance sensor to intelligent flexible, be amplitude; By can be by the control of reactance control element size control to $j\frac{X_S^{\′}\left(t\right)}{2}=j\frac{X_S\left(t\right)}{2}-n*j{X}_{\mathrm{SC}}\left(t\right)$ （n=1，2，3……20）。

As shown in Figure 4, in figure t with the equivalent voltage vector value of new forms of energy micro-capacitance sensor after step-up transformer of the regenerative resource compositions such as larger wind power plants and large-sized photovoltaic power station (35KV and more than), t transmission line transmits the transmission line between series compensation device mounting points m inductive reactance value from micro-capacitance sensor to intelligent flexible, the current vector value flowed t transmission line transmits between series compensation device transmission line from micro-capacitance sensor to intelligent flexible, that micro-capacitance sensor and bulk power grid transmit series compensation device in t equivalent voltage vector value through intelligent flexible, the current vector value flowed in the transmission line between t intelligent flexible transmission series compensation device mounting points m to bulk power grid, the inductive reactance value of the transmission line between t intelligent flexible transmission series compensation device mounting points m to bulk power grid, it is the voltage vector value of t bulk power grid;-jX _sCt () is the capacity reactance value in the transmission line dotted line frame between t micro-capacitance sensor to m point in reactance control element, X _sCt () is-jX _sCthe amplitude of (t), be amplitude; By can be by the control of reactance control element size control to (n=1,2,3 ... 20) ,-jX _rct () is the capacity reactance value in the transmission line dotted line frame between t bulk power grid to intelligent flexible transmission series compensation device mounting points m in reactance control element, X _rct () is-jX _rcthe amplitude of (t); Because this circuit is full symmetrics in m point both sides, so be only illustrated the connection of element in micro-capacitance sensor to m point lateral circuit; negative pole be connected with earth point, positive pole with left end be connected; right-hand member be connected with the left end of reactance control element in micro-capacitance sensor transmission line dotted line frame, in the dotted line frame of power transmission line micro-capacitance sensor road reactance control element right-hand member with positive pole be connected; negative pole be connected with reactance control element left end in bulk power grid transmission line dotted line frame; In bulk power grid transmission line dotted line frame reactance control element right-hand member with left end be connected, right-hand member with positive pole be connected; negative pole be connected with earth point.

As shown in Figure 5, t with the equivalent voltage vector value of new forms of energy micro-capacitance sensor after step-up transformer of the regenerative resource compositions such as larger wind power plants and large-sized photovoltaic power station (35KV and more than), that t transmission line transmits transmission line between series compensation device mounting points m through TSSC from micro-capacitance sensor to intelligent flexible _stotal reactance value after (t) control, the current vector value flowed t transmission line transmits between series compensation device transmission line from micro-capacitance sensor to intelligent flexible, t intelligent flexible transmission series compensation device equivalent voltage vector value, the current vector value flowed in the transmission line between t intelligent flexible transmission series compensation device mounting points m to bulk power grid, that transmission line between t intelligent flexible transmission series compensation device mounting points m to bulk power grid is through TSSC _rtotal reactance value after (t) control, it is the voltage vector value of t bulk power grid; it is the voltage vector value between t intelligent flexible transmission series compensation device mounting points m to ground; negative pole be connected with earth point, positive pole with left end be connected, right-hand member with positive pole be connected, negative pole with left end be connected; right-hand member with positive pole be connected; negative pole be connected with earth point.What Fig. 5 represented is that t is carried electric current and the active power of transmitting series compensation device control through intelligent flexible to bulk power grid by micro-capacitance sensor, also can represent with same circuit that bulk power grid is to micro-capacitance sensor conveying electric current and active power, only needs the flow direction changing electric current and active power.

As shown in Figure 6, this figure is that micro-capacitance sensor transmits equivalent current voltage vector diagram when series compensation device is connected with bulk power grid through intelligent flexible; that t transmission line transmits transmission line between series compensation device mounting points m through TSSC from micro-capacitance sensor to intelligent flexible _stotal reactance value after (t) control and t micro-capacitance sensor and intelligent flexible transmit the current vector value between series compensation device mounting points m in circuit both products; it is the voltage vector value that t micro-capacitance sensor and intelligent flexible transmit series compensation device transmission line intermediate point; that transmission line between t intelligent flexible transmission series compensation device mounting points m to bulk power grid is through TSSC _rtotal reactance value after (t) control and t intelligent flexible transmits the current vector value between series compensation device mounting points m to bulk power grid in circuit both products; the series compensation device of t intelligent flexible transmission and the voltage vector value of bulk power grid transmission line intermediate point; δ (t) is micro-capacitance sensor side voltage vector with bulk power grid side voltage vector between at the angle of t; As shown in Figure 6: due to the regulating action of intelligent flexible transmission series compensation device, the voltage swing of m point and direction are constantly changes, cause two voltage vector value size and Orientations can constantly change, thus complete the transmission of bidirectional flexible active power and reactive power.

As shown in Figure 7, this figure is that intelligent flexible transmission Series Compensated Transmission Lines is gained merit, the load angle characteristic figure of reactive power; From formula (1) to formula (12), we can obtain under the adjustment of intelligent flexible transmission series compensation device, and the active power in transmission line and the changing value of reactive power, obtain from formula (8) the maximum of active power occurs in merit angle δ (t)=90 °, penalty coefficient R (t)=0 in traditional power-angle curve, and now its value is due to the regulating action of penalty coefficient R (t) in intelligent flexible transmission series compensation device, when penalty coefficient R (t)=0.5, $P\left(t\right)=\frac{{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{X_L\left(t\right)[1-R\left(t\right)]}\sin \mathrm{\δ}\left(t\right)=2P_{\max }\left(t\right)=2\frac{{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{X_L\left(t\right)};$ Active power maximum rises in the power-angle curve after the adjustment of penalty coefficient R (t)=0.5 by traditional power-angle curve, now its power angle also occurs in δ (t)=90 ° and reaches maximum, active power adds twice, and now its value is obtain from formula (11) the maximum of reactive power when traditional power-angle curve is taken in penalty coefficient R (t)=0, Q _c(t)=0; Due to the regulating action of penalty coefficient R (t) in intelligent flexible transmission series compensation device, when penalty coefficient R (t)=0.5, when reactive power value is by R (t)=0, Q _ct ()=0, rise in the power-angle curve after regulating when penalty coefficient R (t)=0.5, now its power angle occurs in δ (t)=180 ° and reaches maximum, and reactive power creates transition, and now its value is visible intelligent flexible transmission series compensation device has powerful no-power compensation function, this transmits paralleling compensating device than intelligent flexible and has obvious superiority solving the low voltage crossing problem between micro-capacitance sensor and bulk power grid shows, but be worth mentioning, the operation due to intelligent flexible transmission series compensation device makes the transmission line total reactance value X of the transmission line between t micro-capacitance sensor to bulk power grid after intelligent flexible transmission series compensation device compensates _eqt () constantly changes, the Dai Weinan impedance between transmission line and two systems is made to change like this, because impedance and frequency dependence, so under some harmonic frequency, easily cause the resonance of system, but contain mixed active electric power dynamic filter HAPDF because apparatus of the present invention intelligent flexible transmits series compensation device _s(t), HAPDF _rt namely each several part circuit in this device of () event and its coordinated operation solve the interference of harmonic wave and the generation of resonance.

As shown in Figure 8, this figure be Unified Power Flow system both sides voltage equal time current/voltage vector circuitry figure; When micro-capacitance sensor high-pressure side equivalent voltage vector in t by transmission line inductive reactance jX _lt () is to bulk power grid voltage vector conveying current vector time, the problem of Unified Power Flow may be there is, particularly as in Fig. 8, when namely two voltage vectors are when equal and opposite in direction direction is identical, theoretically, now and the transmission of active power and reactive power is also 0, addressing this problem can be as shown in Figure 9; In Fig. 8 negative pole with negative pole be connected, positive pole and jX _lt the left end of () is connected, jX _lthe right-hand member of (t) with positive pole be connected.

As shown in Figure 9, this figure be Unified Power Flow system both sides voltage equal time through intelligent flexible transmission series compensation device control equivalent circuit diagram; For working as of running in solution Fig. 8 namely the through-put power that micro-capacitance sensor and bulk power grid two voltage vector run into when equal and opposite in direction direction is identical is the problem of 0, and the equivalent electric circuit in available Fig. 9 solves; t with the equivalent voltage vector value of new forms of energy micro-capacitance sensor after step-up transformer of the regenerative resource compositions such as larger wind power plants and large-sized photovoltaic power station (35KV and more than), that t transmission line transmits transmission line between series compensation device mounting points m through TSSC from micro-capacitance sensor to intelligent flexible _stotal reactance value after (t) control, the current vector value flowed t transmission line transmits between series compensation device transmission line from micro-capacitance sensor to intelligent flexible, and the current vector value flowed in the transmission line between t intelligent flexible transmission series compensation device mounting points m to bulk power grid, that transmission line between t intelligent flexible transmission series compensation device mounting points m to bulk power grid is through TSSC _rtotal reactance value after (t) control, the voltage vector value of t bulk power grid, it is the voltage vector value between t intelligent flexible transmission series compensation device mounting points m to ground; T namely there is the Unified Power Flow problem that transmission line both end voltage equal and opposite in direction direction is identical; be t intelligent flexible transmission series compensation device equivalent voltage vector value, it is characterized by in solution Unified Power Flow problem as above, play conclusive effect, this effect will be illustrated in Fig. 10; negative pole be connected with earth point, positive pole with left end be connected, right-hand member with negative pole be connected; positive pole with left end be connected, right-hand member with positive pole be connected, negative pole be connected with earth point.As shown in Figure 9, t is in intelligent flexible transmission series compensation device equivalent voltage vector value help under, produce advanced at y point voltage vector due to in advance so this circuit can carry active power to solve above-described Unified Power Flow problem to bulk power grid by micro-capacitance sensor, also can represent that bulk power grid is to micro-capacitance sensor conveying electric current and active power, only needs the flow direction changing electric current with this circuit for same Unified Power Flow problem.

As shown in Figure 10, this figure be Unified Power Flow system both sides voltage equal time through intelligent flexible transmission series compensation device control voltage trace vectogram; In figure the current vector value flowed t transmission line transmits between series compensation device transmission line from micro-capacitance sensor to intelligent flexible, and be t intelligent flexible transmission series compensation device equivalent current vector, θ 1 (t) is t voltage vector value equal to two between angle; be it is advanced that the running orbit of voltage vector produces voltage vector diagram, with intelligent flexible transmission series compensation device by pulse width modulation controlled IGCT five-level switch magnetic topological circuit, make intelligent flexible transmit series compensation device equivalent current vector the equivalent voltage vector of intelligent flexible transmission series compensation device four quadrant running, namely angle and amplitude constantly change, thus control micro-capacitance sensor equivalence high side voltage vector micro-capacitance sensor high-pressure side equivalent voltage vector with bulk power grid voltage vector between angle δ _sthe amplitude of (t) and angle; With the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) control between micro-capacitance sensor to transmission line intermediate point m place transmission line reactance amplitude just because of with acting in conjunction create the running orbit voltage vector of voltage vector δ 1 (t) is voltage vector value equal to two between angle, because the appearance at δ 1 (t) angle makes voltage vector is advanced therefore equal Unified Power Flow problem can be solved and on transmission line, produce the meritorious of bidirectional flexible transmission and reactive power; φ 1 (t) is t voltage vector voltage vector value equal to two between angle.

As shown in figure 11, this figure be Unified Power Flow system both sides voltage magnitude not wait time through intelligent flexible transmit series compensation device control power transfer circuitry figure; The through-put power that micro-capacitance sensor runs into when equal and opposite in direction direction is identical with bulk power grid two voltage vector is the problem of 0, can solve with the equivalent circuit in Fig. 9; If running into micro-capacitance sensor high-pressure side equivalent voltage vector in Unified Power Flow problem With bulk power grid side voltage vector value Differ in size but then can solve with the equivalent circuit in Figure 11 and Figure 12 during the identical problem in direction; Circuit shown in Figure 11 connects and completely the same in the definition of all parameters and Fig. 9, uniquely the difference is that in fig .9 With Not only direction is identical but also equal and opposite in direction, and in Figure 11 With Direction is identical but amplitude does not wait or varies in size; By the formula of active power transfer Want that if known, from the side of transmission line of electricity to opposite side transmission power, angle δ (t) of both sides transmission line of electricity voltage vector must not be 0, if therefore solve the above problem run into, namely can transmit series compensation device with intelligent flexible and solve; Under the effect of intelligent flexible transmission series compensation device in Figure 11 Produce active-power P _a(t), and intelligent flexible transmission series compensation device helps the active-power P of micro-capacitance sensor side _sT () can transmit to bulk power grid side, the active-power P received at bulk power grid side joint like this _r(t)=P _s(t)+P _a(t); It is t with the equivalent voltage vector value of the new forms of energy micro-capacitance sensor of the regenerative resource compositions such as larger wind power plants and large-sized photovoltaic power station after step-up transformer (35KV and more than), It is that t transmission line of electricity transmits the transmission line of electricity between series compensation device mounting points m through TSSC from micro-capacitance sensor to intelligent flexible _sTotal reactance value after (t) control, It is the current vector value that t transmission line of electricity transmits flowing the transmission line of electricity between series compensation device from micro-capacitance sensor to intelligent flexible, and It is the current vector value of flowing in the transmission line of electricity between t intelligent flexible transmission series compensation device mounting points m to bulk power grid, It is that the transmission line of electricity between t intelligent flexible transmission series compensation device mounting points m to bulk power grid is through TSSC _rTotal reactance value after (t) control, It is the voltage vector value of t bulk power grid, It it is the voltage vector value between t intelligent flexible transmission series compensation device mounting points m to ground; T But Voltage vector with Vector direction is consistent or phase place consistent, namely occur that transmission line of electricity both end voltage differs in size but the identical Unified Power Flow problem in direction; It is t intelligent flexible transmission series compensation device equivalent voltage vector value,It is characterized by Playing conclusive effect in solution Unified Power Flow problem as above, this effect will be illustrated in fig. 12; Negative pole be connected with earth point, Positive pole with Left end be connected, Right-hand member with Positive pole be connected, Negative pole with Left end be connected, Right-hand member with Positive pole be connected, Negative pole be connected with earth point.As shown in Figure 11, t is in intelligent flexible transmission series compensation device equivalent voltage vector value help under, produce advanced at y point voltage vector due to in advance so this circuit carries electric current and active power to solve above-described Unified Power Flow problem by micro-capacitance sensor to bulk power grid, with this circuit, same Unified Power Flow problem is also represented that bulk power grid is to micro-capacitance sensor conveying electric current and active power, only needs the flow direction changing electric current and active power.

As shown in figure 12, this figure be Unified Power Flow system both sides voltage magnitude not wait time through intelligent flexible transmission series compensation device control voltage trace vectogram; T can be seen in the drawings but voltage vector with the direction of vector is consistent or phase place consistent, in this figure amplitude be less than amplitude, namely micro-capacitance sensor voltage magnitude is less than bulk power grid voltage magnitude, but now wishes that micro-capacitance sensor carries active power to bulk power grid, by means of intelligent flexible transmission series compensation device effect constantly regulate and pass through TSSC _rt () constantly regulates current/voltage vector locus creates a voltage vector dashed circle track, be voltage vector running orbit, and in advance voltage vector δ 2 (t) angle, δ 2 (t) is voltage vector with voltage vector between angle, the vector relations between each electric current and voltage can be obtained from Figure 12; in Figure 12, θ 2 (t) is current vector with voltage vector between angle, at this t current vector leading voltage vector, because voltage vector leading voltage vector δ 2 (t) angle, according to formula can ensure that active power is transmitted to bulk power grid by transmission line by micro-capacitance sensor, thus solve the transmission problem of power when Unified Power Flow system both sides voltage magnitude does not wait, and active power can be transferred to the large side of voltage magnitude by the side that voltage magnitude is little, from Figure 12 and Figure 10, intelligent flexible transmission series compensation device has obvious function when solving Unified Power Flow problem.

As shown in figure 13, the equivalent circuit diagram that this figure is transmission line both sides voltage when being arbitrary value after intelligent flexible transmission series compensation device controls; This figure is by t bulk power grid side voltage vector bulk power grid equivalent voltage vector is equivalent to bulk power grid side transmission line namely by vectorial to intelligent flexible transmission series compensation device equivalent voltage with intelligent flexible transmission series compensation device equivalent current vector control, the voltage of grid side is regulated, makes it to maintain in the voltage request of strong intelligent grid; In figure t intelligent flexible transmission series compensation device equivalent current vector, in figure that t is through TSSC _st the micro-capacitance sensor after () control is to the equivalent reactance of intelligent flexible transmission series compensation device mounting points m transmission line; By vectorial to intelligent flexible transmission series compensation device equivalent current intelligent flexible transmission series compensation device equivalent voltage vector angle and the continuous adjustment of amplitude can maintain bulk power grid equivalent voltage vector be in stable standard, this circuit can be used for regulating the problem such as bulk power grid voltage fluctuation and low voltage crossing; Because intelligent flexible transmits the equivalent current vector of series compensation device for this reason voltage vector having the function of four quadrant running, if be benchmark with micro-capacitance sensor, take bulk power grid as regulated quantity, so this circuit also for bulk power grid to micro-capacitance sensor transmission power, and the problem such as voltage fluctuation and low voltage crossing of micro-capacitance sensor to be regulated; In Figure 13 positive pole with left end be connected, negative pole with negative pole be connected; right-hand member with positive pole be connected, negative pole with positive pole be connected, negative pole with negative pole be connected.

As shown in figure 14, this figure is micro-capacitance sensor and bulk power grid voltage transmits series compensation device through intelligent flexible when being arbitrary value and controls after-current voltage trace vectogram; In figure, θ 3 (t) is the current vector that intelligent flexible transmission series compensation device sends with t by bulk power grid side voltage vector with the bulk power grid side equivalent voltage vector after the equivalence of grid side transmission line reactance compensation between angle, δ 3 (t) is t micro-capacitance sensor side voltage vector with bulk power grid side equivalent voltage vector between angle, due to intelligent flexible transmission series compensation device send equivalent voltage vector with current vector can regulate arbitrarily at four quadrant running, namely with between phase place and amplitude can regulate arbitrarily, therefore in fig. 14 for maintaining bulk power grid voltage stable, can regulate arbitrarily with and pass through TSSC _st () regulates thus micro-capacitance sensor high-pressure side equivalent voltage vector can be made run on dashed circle track in fig. 14, as can be seen from Figure 14 when micro-capacitance sensor high-pressure side equivalent voltage vector operate on dashed circle track, micro-capacitance sensor carries active power and reactive power by transmission line to bulk power grid.

As shown in figure 15, this figure is micro-capacitance sensor and bulk power grid voltage when being arbitrary value through intelligent flexible transmit series compensation device control after active power minimax time current/voltage running orbit vectogram; In figure, θ 4 (t) is the current vector that intelligent flexible transmission series compensation device sends with t by bulk power grid side voltage vector with the bulk power grid side equivalent voltage vector after the equivalence of grid side transmission line reactance compensation between angle, δ 4 (t) is t micro-capacitance sensor side voltage vector with bulk power grid side equivalent voltage vector between angle, as shown in FIG., the positive maximum of voltage vector that sends of intelligent flexible transmission series compensation device drop on intelligent flexible transmission series compensation device mounting points m be the center of circle, for the D point of the dashed circle track of radius, when negative maximum drops on the C point of dashed circle track, intelligent flexible transmission series compensation device sends maximum or minimum active power to bulk power grid, controls to realize by intelligent flexible transmission series compensation device to the control of active power to IGCT five-level switch magnetic topological circuit.

As shown in figure 16, this figure is micro-capacitance sensor and bulk power grid voltage when being arbitrary value through intelligent flexible transmit series compensation device control after reactive power minimax time current/voltage running orbit vectogram; In figure, θ 5 (t) is the current vector that intelligent flexible transmission series compensation device sends with t by bulk power grid side voltage vector with the bulk power grid side equivalent voltage vector after the equivalence of grid side transmission line reactance compensation between angle, δ 5 (t) is t micro-capacitance sensor side voltage vector with bulk power grid side equivalent voltage vector between angle, as shown in FIG., when the maximum of the reactive power that sends of intelligent flexible transmission series compensation device, operate in intelligent flexible transmission series compensation device mounting points m be the center of circle, for the D point of the dashed circle track of radius, now for on the occasion of; During the reactive power minimum value sent, operate in the C point of dashed circle track, now for negative value; Intelligent flexible transmission series compensation device can send maximum or minimum reactive power to bulk power grid, completely controls to realize to IGCT five-level switch magnetic topological circuit by intelligent flexible transmission series compensation device to the control of reactive power; In Figure 16 when when operating in D point or the C point of dashed circle track, the equivalent voltage vector that intelligent flexible transmission series compensation device produces with equivalent current vector advanced or delayed 90 ° of angles, can ensure that intelligent flexible transmission series compensation device sends advanced or delayed reactive power to bulk power grid like this.

Claims (2)

1. micro-capacitance sensor and a bulk power grid high-voltage intelligent flexible transmission serial connection compensation, it comprises micro-capacitance sensor side mixed active electric power dynamic filter circuit (HAPDF _s(t)) (1), micro-capacitance sensor side electrical parameter detection circuit (2), micro-capacitance sensor side power comparison circuit (3), micro-capacitance sensor side power difference circuit (4), integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit (5), integrated gate commutated thyristor (IGCT) switch driving circuit (6), intelligent flexible transmission series compensation device DSP control circuit (7), bulk power grid side electrical parameter detection circuit (8), bulk power grid side power comparison circuit (9), bulk power grid side power difference circuit (10) and bulk power grid side mixed active electric power dynamic filter circuit (HAPDF _r(t)) (11), it is characterized in that: further comprising the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) the series compensation capacitor circuit (TSSC of (12) and bulk power grid side bidirectional thyristor switch control rule _r(t)) (13), the left end of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit (5) and the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) (12) right-hand member be connected, the right-hand member of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit (5) and the series compensation capacitor circuit (TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)) (13) left end be connected, the lower end of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit (5) is connected with the upper end of integrated gate commutated thyristor (IGCT) switch driving circuit (6), by the operation to integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit (5), to control the difference DELTA P (t) of mounting points m both sides active power and the difference DELTA Q (t) of reactive power of transmission line, thus solve the bottleneck of electric power transmission, Unified Power Flow, voltage fluctuation, humorous wave interference, the problem of low voltage crossing ability to bear weakness, series compensation capacitor circuit (the TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) left end of (12) and the side reactance of transmission line micro-capacitance sensor right-hand member connect, the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) lower end of (12) and intelligent flexible transmit the series compensation capacitor circuit (TSSC of the micro-capacitance sensor side bidirectional thyristor switch control rule that series compensation device dsp controller circuit (7) is arranged _s(t)) input and output and communication port connect, the series compensation capacitor circuit (TSSC of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) right-hand member of (12) is connected with the left end of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit (5), and its function is at the series compensation capacitor circuit (TSSC of t by micro-capacitance sensor side bidirectional thyristor switch control rule _s(t)) control make micro-capacitance sensor to the mounting points m place of transmission line reactance value by control to series compensation capacitor circuit (the TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)) right-hand member of (13) and the side reactance of transmission line bulk power grid left end connect, the series compensation capacitor circuit (TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)) lower end of (13) and intelligent flexible transmit the series compensation capacitor circuit (TSSC of the bulk power grid side bidirectional thyristor switch control rule that series compensation device dsp controller circuit (7) is arranged _r(t)) input and output and communication port connect, the series compensation capacitor circuit (TSSC of bulk power grid side bidirectional thyristor switch control rule _r(t)) left end of (13) is connected with the right-hand member of integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit (5), and its function is at the series compensation capacitor circuit (TSSC of t by bulk power grid side bidirectional thyristor switch control rule _r(t)) control make bulk power grid to the mounting points m place of transmission line reactance value by control to

2. a control method for micro-capacitance sensor according to claim 1 and bulk power grid high-voltage intelligent flexible transmission serial connection compensation, is characterized in that: the line reactance X first setting up flexible active-power P (t) that in micro-capacitance sensor and bulk power grid connection line, real time bidirectional flows, flexible reactive power power Q (t) and transmission line two ends _lthe micro-capacitance sensor high-pressure side equivalent voltage vector at (t), transmission line two ends the bulk power grid side voltage vector at transmission line two ends with micro-capacitance sensor high-pressure side equivalent voltage vector between voltage vector angle and power angle δ (t), computation model between transmission line between t micro-capacitance sensor to bulk power grid penalty coefficient R (t) after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation compensate:

$P\left(t\right)=P_s\left(t\right)={-P}_r\left(t\right)=\frac{{\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{X_L\left(t\right)[1-R\left(t\right)]}\sin \mathrm{\δ}\left(t\right)=\frac{{\left|{\stackrel{\‾}{V}}_s\left(t\right)\right|}^2}{2[1-R_s\left(t\right)]\frac{X_s\left(t\right)}{2}}\sin {\mathrm{\δ}}_s\left(t\right)---\left(1\right)$

In formula (1): the flexible active-power P (t) of real time bidirectional flowing is the maximum that t adopts flexible transfer active power on transmission line after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation, P _st () to be t micro-capacitance sensor to connect active power to the flexibility that bulk power grid is sent through micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation, P _rt () to be t bulk power grid to connect active power from the flexibility that micro-capacitance sensor absorbs through micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation; the runtime value of voltage vector on t transmission line, δ _st () is that after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation adopt, t is vectorial at the micro-capacitance sensor high-pressure side equivalent voltage of S point Real-time Collection with bulk power grid side voltage vector between angle, the reactance value of transmission line between the micro-capacitance sensor side voltage S point of t Real-time Collection after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation adopt and the mounting points m of transmission line, x _lt () is the transmission line inductive reactance value jX between t micro-capacitance sensor to bulk power grid _lthe amplitude of (t); X _ct () is the capacity reactance value-jX of transmission line after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation compensate between t micro-capacitance sensor to bulk power grid _cthe amplitude of (t); R (t) is the penalty coefficient of transmission line after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation compensate between t micro-capacitance sensor to bulk power grid, 0≤R (t)≤1; R _st () is micro-capacitance sensor side voltage S point and the penalty coefficient of transmission line reactance value between micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation mounting points m of t Real-time Collection after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation are run x _cst () is through micro-capacitance sensor side bidirectional thyristor switch control rule series compensation capacitor circuit TSSC _st the micro-capacitance sensor side voltage S point of t Real-time Collection and the reactance value of transmission line electric capacity between micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation mounting points m after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation run that () controls;

$P(t-1)=P_s(t-1)={-P}_r(t-1)=\frac{{\left|\stackrel{\‾}{V}(t-1)\right|}^2}{X_L(t-1)[1-R(t-1)]}\sin \mathrm{\δ}(t-1)=\frac{{\left|{\stackrel{\‾}{V}}_s(t-1)\right|}^2}{2[1-R_s(t-1)]\frac{X_s(t-1)}{2}}\sin {\mathrm{\δ}}_s(t-1)---\left(2\right)$

In formula (2): the flexible active-power P (t-1) of real time bidirectional flowing is the maximum adopting flexible transfer active power on transmission line after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation the t-1 moment, P _s(t-1) be t-1 moment micro-capacitance sensor to connect active power to the flexibility that bulk power grid is sent through micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation, P _r(t-1) be t-1 moment bulk power grid to connect active power from the flexibility that micro-capacitance sensor absorbs through micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation; the runtime value of voltage vector on t-1 moment transmission line, δ _s(t-1) the micro-capacitance sensor high-pressure side equivalent voltage vector of S point Real-time Collection is engraved in when being t-1 after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation adopt with bulk power grid side voltage vector between angle, the reactance value of transmission line between the micro-capacitance sensor side voltage S point of t-1 moment Real-time Collection after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation adopt and the mounting points m of transmission line, x _l(t-1) be transmission line inductive reactance value jX between t-1 moment micro-capacitance sensor to bulk power grid _l(t-1) amplitude; X _c(t-1) be the capacity reactance value-jX of transmission line after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation compensate between t-1 moment micro-capacitance sensor to bulk power grid _c(t-1) amplitude; R (t-1) is the penalty coefficient of transmission line after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation compensate between t-1 moment micro-capacitance sensor to bulk power grid, 0≤R (t-1)≤1; R _s(t-1) be micro-capacitance sensor side voltage S point and the penalty coefficient of transmission line reactance value between micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation mounting points m of t Real-time Collection after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation are run x _cs(t-1) be through micro-capacitance sensor side bidirectional thyristor switch control rule series compensation capacitor circuit TSSC _s(t-1) the micro-capacitance sensor side voltage S point of t-1 moment Real-time Collection and the reactance value of transmission line electric capacity between micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation mounting points m after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation run that control;

$\begin{array}{c}{Q}_c\left(t\right)=Q_s\left(t\right)={-Q}_r\left(t\right)\\ =\frac{{2\left|\stackrel{\‾}{V}\left(t\right)\right|}^2}{X_L\left(t\right)}*\frac{R\left(t\right)}{{[1-R\left(t\right)]}^2}*(1-\cos \left(t\right))\\ =\frac{{\left|{\stackrel{\‾}{V}}_s\left(t\right)\right|}^2}{\frac{X_s\left(t\right)}{2}}*\frac{R_s\left(t\right)}{{[1-R_s\left(t\right)]}^2}*(1-\cos {\mathrm{\δ}}_s\left(t\right))\end{array}---\left(3\right)$

In formula (3): Q _c(t) be micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation when running t compensate in transmission line can the reactive power of two-way series flexible transfer, Q _st () is the flexible reactive power power that after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation are run, t micro-capacitance sensor is sent to bulk power grid, Q _rt () is the flexible reactive power power that after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation are run, t bulk power grid absorbs from micro-capacitance sensor;

$\begin{array}{c}{Q}_c(t-1)=Q_s(t-1)={-Q}_r(t-1)\\ =\frac{2{\left|\stackrel{\‾}{V}(t-1)\right|}^2}{X_L(t-1)}*\frac{R(t-1)}{{[1-R(t-1)]}^2}*(1-\cos \mathrm{\δ}(t-1))---\left(4\right)\\ =\frac{{\left|{\stackrel{\‾}{V}}_s(t-1)\right|}^2}{\frac{X_s(t-1)}{2}}*\frac{R_s(t-1)}{{[1-R_s(t-1)]}^2}*(1-\cos {\mathrm{\δ}}_s(t-1))\end{array}$

In formula (4): Q _c(t-1) be micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation when running the t-1 moment compensate in transmission line can the reactive power of two-way series flexible transfer, Q _s(t-1) be the flexible reactive power power that after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation are run, t-1 moment micro-capacitance sensor is sent to bulk power grid, Q _r(t-1) be the flexible reactive power power that after micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation are run, t-1 moment bulk power grid absorbs from micro-capacitance sensor;

Pass through pulse width modulation controlled integrated gate commutated thyristor (IGCT) five-level switch magnetic topological circuit by micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation, make micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation equivalent current vector the equivalent voltage vector of micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation four quadrant running, namely angle and amplitude constantly change, thus control micro-capacitance sensor equivalence high side voltage vector micro-capacitance sensor high-pressure side equivalent voltage vector with bulk power grid voltage vector between angle δ _sthe amplitude of (t) and angle; Micro-capacitance sensor side voltage S point and the penalty coefficient R of transmission line reactance value between micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation mounting points m that micro-capacitance sensor and bulk power grid high-voltage intelligent flexible transmission serial connection compensation run t Real-time Collection is afterwards controlled with the series compensation capacitor circuit (TSSCs (t)) of micro-capacitance sensor side bidirectional thyristor switch control rule _s(t), thus control the transmission line reactance between micro-capacitance sensor to transmission line mounting points m place amplitude according to micro-capacitance sensor high-pressure side equivalent voltage vector micro-capacitance sensor high-pressure side equivalent voltage vector with bulk power grid side voltage vector between angle δ _stransmission line reactance between (t) and micro-capacitance sensor to transmission line mounting points m place calculate active-power P _s(t) and reactive power Q _s(t), and to its compensated solve in transmission line occur Unified Power Flow, low voltage crossing ability to bear weakness problem, according to micro-capacitance sensor side t and the active power difference Δ P in t-1 moment _s(t)=P _s(t)-P _sand reactive power difference Δ Q (t-1) _s(t)=Q _s(t)-Q _sand bulk power grid side t and t-1 moment active power difference Δ P (t-1) _r(t)=P _r(t)-P _rand reactive power difference Δ Q (t-1) _r(t)=Q _r(t)-Q _r(t-1), and according to detecting from micro-capacitance sensor side and bulk power grid side the parameter information obtained, active power regulation controlled quentity controlled variable Δ P (t)=Δ P is formed _s(t)-Δ P _r(t) and reactive power regulable control amount Δ Q (t)=Δ Q _s(t)-Δ Q _rt (), realizes flexible active-power P _s(t) and flexible reactive power power Q _sthe control of (t).