CN104410086A - Device and method for dynamically compensating impact load of natural gas power station - Google Patents
Device and method for dynamically compensating impact load of natural gas power station Download PDFInfo
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Abstract
The invention provides a device and a method for dynamically compensating the impact load of a natural gas power station, relates to the dynamic compensation technology of the impact load of the natural gas power station and aims at solving the problem that the application of a natural gas generator set in case of impact load existing in a power supply network is restricted by the poor dynamic power regulation capability of the natural gas generator set. The power station network information detection unit of the device is used for detecting three-phase current signals of the power supply network of the natural gas power station; the current acquired signal output end of the power station network information detection unit is connected to the power network current acquired signal input end of a four-quadrant rectification/inversion unit; the three-phase current signals of the power station network information detection unit are filtered by an LCL filter unit and then input into the three-phase current signal input end of the four-quadrant rectification/inversion unit, and multiple bidirectional charge/discharge control is realized during charging and discharging of a super capacitor; a multiple DC/DC unit has two working modes, namely a step-up working mode and a step-down working mode. The step-up working mode is used for realizing charge control of the super capacitor. The device is used for dynamically compensating the impact load of the natural gas power station.
Description
Technical field
The present invention relates to natural gas power station impact load dynamic compensation technology.
Background technology
Natural gas power station is the electric power system with relatively high power be made up of some natural gas power units.Natural gas power unit is comparatively low than the carbon of conventional diesel generating set, sulfur emissions, and under equal energy, natural gas is comparatively low than the price of diesel oil simultaneously.Therefore, natural gas power machine set system is adopted all to have great advantage in energy-saving and emission-reduction and reduction cost of electricity-generating.
But, the dynamic power regulating power of natural gas power unit is comparatively poor than diesel generating set, the slow characteristic of this dynamic response constrains the application that it has impact load scenarios in a power supply network, when loading rate and front and back difference power larger time, often cause the parking accident of natural gas power unit.
Summary of the invention
The present invention is that the dynamic power regulating power in order to solve natural gas power unit is poor, constrain the problem that natural gas power unit has the application of impact load scenarios in a power supply network, propose a kind of natural gas power station impact load dynamic compensating device and method.
Natural gas power station of the present invention impact load dynamic compensating device, this device comprises based on the main control unit of PAC, energy-storage units, multiple DC/DC unit, four-quadrant rectification/inversion unit, LCL filter unit, power station network information detecting unit and insulating power supply;
Power station network information detecting unit is for detecting the three-phase current signal of natural gas power station power supply net, the current acquisition signal output part of power station network information detecting unit connects the power network current collection signal input of four-quadrant rectification/inversion unit, the three-phase current signal of power station network information detecting unit inputs to the three-phase current signal input of four-quadrant rectification/inversion unit after LCL filtering unit filters
Power network current signal input current changeover control signal output based on the main control unit of PAC connects the power network current signal output current changeover control signal input of four-quadrant rectification/inversion unit, the energy storage signal output part of multiple DC/DC unit connects the energy storage signal input part of energy-storage units, the charge and discharge control signal that the charge and discharge control signal input charging and discharging state feedback signal output of multiple DC/DC unit connects based on the main control unit of PAC exports charging and discharging state feedback signal input terminal, collection switch controlling signal output based on the main control unit of PAC connects the collection switch controlling signal input of power station network information detecting unit, energy storage switch controlling signal output based on the main control unit of PAC connects the energy storage switch controlling signal input of energy-storage units, described insulating power supply is used for for multiple DC/DC unit, four-quadrant rectification/inversion unit and powering based on the main control unit of PAC.
Adopt above-mentioned natural gas power station impact load dynamic compensating device to realize the method for dynamic compensation, the concrete steps of the method are:
Step one: open that insulating power supply is multiple DC/DC unit, four-quadrant rectification/inversion unit and powering based on the main control unit of PAC, Main Control Unit carries out setting parameter according to natural gas power station and load to natural gas power station impact load dynamic compensating device;
The parameter of described setting comprises the rated voltage, the rated current of compensation arrangement output, the rated power of compensation arrangement output, the closed loop control parameters of four-quadrant rectification/inversion unit that export compensation arrangement, the closed loop control parameters of four-quadrant rectification/inversion unit described in the charging and discharging closed loop control parameters of multiple DC/DC unit comprises proportional gain and the storage gain of current closed-loop PI controller, and the charging and discharging closed loop control parameters of multiple DC/DC unit comprises proportional gain and the storage gain of current closed-loop PI controller;
Step 2: when the switch of power station network information detecting unit closes a floodgate, the DC bus-bar voltage in multiple DC/DC unit arrives predetermined value; Multiple DC/DC unit charges to energy-storage units; (this predetermined value is 80% of DC bus rated voltage; )
Step 3: Main Control Unit controls four-quadrant rectification/inversion unit and works in PWM rectification mode, multiple DC/DC cell operation is in Buck chopping mode, charge to energy-storage units, until the voltage rise of the super capacitor of energy-storage units stops charging to during predetermined value, power station network information detecting unit starts to detect the load in natural gas power station;
Step 4: when impact load appears in natural pneumoelectric station, Main Control Unit calculates the power stage of adjustment four-quadrant rectification/inversion unit according to the Adaptive Compensation Control of impact load, and make multiple DC/DC cell operation in Boost pattern, realize fixing DC bus-bar voltage constant, realize the compensation to impact load dynamic active power;
Step 5: when the rated value of the power total current that four-quadrant rectification/inversion unit exports beyond compensation arrangement output current, Main Control Unit distributes control algolithm automatically according to P/Q capacity, calculate transition to gain merit offset current and reactive power compensation electric current, control four-quadrant rectification/inversion unit and preferentially export transition active power, simultaneously output reactive power; Realize the compensation of transient current dynamic active power when natural gas power station is occurred;
Step 6: when natural pneumoelectric station exists nonlinear load, Main Control Unit receives control algolithm according to harmonic power, adjustment four-quadrant rectification/inversion unit output harmonic wave electric current, make natural gas generator sine wave output electric current, realize receiving load harmonic power, the dynamic active power realized when there is nonlinear load to natural gas power station compensates.
The advantage that the present invention has: the ability that improve the shock resistance load of natural gas power station, enhances the adaptability in natural gas power station; Load harmonic power is received, substantially reduces the harmonic pollution of nonlinear load to natural gas power station; System can distribute P/Q capacity automatically, reactive power needed for compensating load, and do not ask for idle from natural gas power station, operational efficiency is high; System can adaptive equalization load shock power, makes the soft power output of natural gas engine, can significantly improve natural gas engine useful life; Adopt Integration Design scheme, integrated degree is high, and volume is little, flexible and convenient to use.The present invention can be applicable to natural gas power station deep drilling exploration, and the field of the impact loads such as natural gas power station rolling mill, is with a wide range of applications and larger promotional value.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of natural gas power station of the present invention impact load dynamic compensating device.
Embodiment
Embodiment one, composition graphs 1 illustrate present embodiment, natural gas power station impact load dynamic compensating device described in present embodiment, this device comprises based on the main control unit 1 of PAC, energy-storage units 2, multiple DC/DC unit 3, four-quadrant rectification/inversion unit 4, LCL filter unit 5, power station network information detecting unit 6 and insulating power supply 7;
Power station network information detecting unit 6 is for detecting the three-phase current signal of natural gas power station power supply net, the current acquisition signal output part of power station network information detecting unit 6 connects the power network current collection signal input of four-quadrant rectification/inversion unit 4, the three-phase current signal of power station network information detecting unit 6 inputs to the three-phase current signal input of four-quadrant rectification/inversion unit 4 after LCL filter unit 5 filtering
Power network current signal input current changeover control signal output based on the main control unit 1 of PAC connects the power network current signal output current changeover control signal input of four-quadrant rectification/inversion unit 4, the energy storage signal output part of multiple DC/DC unit 3 connects the energy storage signal input part of energy-storage units 2, the charge and discharge control signal that the charge and discharge control signal input charging and discharging state feedback signal output of multiple DC/DC unit 3 connects based on the main control unit 1 of PAC exports charging and discharging state feedback signal input terminal, collection switch controlling signal output based on the main control unit 1 of PAC connects the collection switch controlling signal input of power station network information detecting unit 6, energy storage switch controlling signal output based on the main control unit 1 of PAC connects the energy storage switch controlling signal input of energy-storage units 2, described insulating power supply is used for for multiple DC/DC unit 3, four-quadrant rectification/inversion unit 4 and powering based on the main control unit 1 of PAC.
The major function of multiple DC/DC unit 3 realizes the electric energy of super capacitor and the conversion of four-quadrant rectification/inversion unit 4 direct current brachium pontis electric energy.The design of this link is according to following principle:
(1), a control board of multiple DC/DC unit 3 has phase shift function, and the phase shifting angle of each power model is 360/N,
N is the number of power model;
(2), multiple DC/DC unit 3 has power model automatic current equalizing function;
(3), multiple DC/DC unit 3 has overcurrent protection function.
The major function of four-quadrant rectification/inversion unit 4 is the power conversion between the AC energy that realizes supply network to direct current brachium pontis.When being charged to super capacitor by multiple DC/DC unit 3, this unit is in PWM high-frequency rectification state; When super capacitor discharges, this unit is in inverter mode.The design principle of this module is as follows:
(1), four-quadrant rectification/inversion unit 4 has bidirectional energy transfer function; This unit can carry out PWM rectification/inversion;
(2), four-quadrant rectification/inversion unit 4 when PWM rectification, power factor can be controlled in the scope of 0 ~ 1;
(3), four-quadrant rectification/inversion unit 4 when inversion, can reasonably distribute P/Q value according to the capacity of compensation arrangement.
During super capacitor discharge and recharge, multiplex Bidirectional charging-discharging controls; Multiple DC/DC unit 3 has boosting and step-down two kinds of mode of operations.Decompression mode controls for the charging realizing super capacitor, adopts the control mode of constant voltage after first constant current.Boost mode is used for controlling super capacitor power output, realizes by adopting direct voltage constant control.The mode of operation of charge-discharge control circuit is decided according to the voltage of current DC voltage value and super capacitor.In the normal course of work, in multiple DC/DC unit 3 each brachium pontis two power devices in, each moment only has a switch.When being operated in buck converter pattern, upper brachium pontis work, lower brachium pontis cut-off, when being operated in step-up converter mode, lower brachium pontis work, upper brachium pontis cut-off.Converter is damaged in order to prevent upper and lower bridge arm conducting simultaneously from causing DC bus short circuit, converter must between these two operating states handoff-security, therefore drive singal will leave certain free time, then another switch conduction after a switch cut-off.
Impact load dynamic compensation mainly carries out transient state and gains merit and the computing of specified rate of reactive current, and completes transient power and export and control.For impact load, when judging to produce impact load, then perform active current rate of change Closed-loop Control Strategy, to ensure that the power output rate of change of gas electricity generator is less than its limiting value, when the power output of gas electricity generator is consistent with bearing power, active current rate of change equals zero, and now power governor exits active power compensation automatically, avoids its long-time active power of output.When not producing impact load, should be super capacitor charging, being realized by multiple DC/DC unit and four-quadrant rectification/inversion unit 4.Multiple DC/DC unit is used for the constant control of DC bus-bar voltage, now power governor absorbed power.When load active power is less than zero, when namely needing absorption and regeneration energy, the active current of power governor becomes negative value, then absorb energy by super capacitor, and then reduces the consumption of fuel, reaches energy-saving effect.For reactive power compensation algorithm, directly using given as power governor of load reactive current, then its reactive power exports and balances each other automatically realizing with load-side.
Embodiment two, present embodiment are further illustrating the natural gas power station impact load dynamic compensating device described in embodiment one, and control unit 1 comprises analog acquisition plate 11, PAC controller 12 and switch template 13;
Energy-storage units 2 comprises super capacitor CSC, discharge resistance R1, discharge control switch SW2, voltage sensor VT3, isolating switch QF2, insurance F6 and insurance F7; Isolating switch QF2 comprises two switches, and described two switches are linked switch,
Multiple DC/DC unit 3 comprises power switching modules CM31, power switching modules CM32, power switching modules CM33, power switching modules CM34, control board 32, voltage sensor TV1, voltage sensor TV2 and a DC bus filter capacitor CO;
Power switching modules CM31 comprises high-frequency filter capacitor C31, insulated gate bipolar translator power tube T31, insulated gate bipolar translator power tube T32, current sensor CT31, smoothing reactor L31 and high-frequency filter capacitor C32;
Power switching modules CM32 comprises high-frequency filter capacitor C33, insulated gate bipolar translator power tube T33, insulated gate bipolar translator power tube T34, current sensor CT32, smoothing reactor L32 and high-frequency filter capacitor C34;
Power switching modules CM33 comprises high-frequency filter capacitor C35, insulated gate bipolar translator power tube T35, insulated gate bipolar translator power tube T36, current sensor CT33, smoothing reactor L34 and high-frequency filter capacitor C36;
Power switching modules CM34 comprises high-frequency filter capacitor C37, insulated gate bipolar translator power tube T37, insulated gate bipolar translator power tube T38, current sensor CT34, smoothing reactor L34 and high-frequency filter capacitor C38;
Four-quadrant rectification/inversion unit 4 comprises four power switching modules, power switching modules CM41, power switching modules CM42, power switching modules CM43 and No. two control board 42;
Power switching modules CM41 comprises current sensor CT41, insulated gate bipolar translator power tube T41, insulated gate bipolar translator power tube T42 and high frequency wave electric capacity C41;
Power switching modules CM42 comprises current sensor CT42, insulated gate bipolar translator power tube T43, insulated gate bipolar translator power tube T44 and high frequency wave electric capacity C42;
Power switching modules CM43 comprises current sensor CT43, insulated gate bipolar translator power tube T45, insulated gate bipolar translator power tube T46 and high frequency wave electric capacity C43;
LCL filter unit 5 comprises smoothing reactor L51, smoothing reactor L52, smoothing reactor L53, smoothing reactor L54, smoothing reactor L55, smoothing reactor L56, filter capacitor C51, filter capacitor C52 and filter capacitor C53
Power station network information detecting unit 6 comprises three-phase isolation switch QF1, three-phase air switch KM1, voltage sensor VT61, voltage sensor VT62, insurance F61, insurance F62 and insurance F63;
Three-phase isolation switch QF1 and three-phase air switch KM1 is three-phase linked switch, three-phase isolation switch QF1 connects with three-phase air switch KM1, three-phase isolation switch QF1 three stiff ends connect the three phase mains in natural gas power station respectively, three movable ends of three-phase air switch KM1 are connected respectively by wave reactor L51, the smoothing reactor L53 of insurance F61, insurance F62 and insurance F63 and LCL filter unit 5 and smoothing reactor L55; The other end of wave reactor L51 connects one end of smoothing reactor L52 and one end of filter capacitor C51 simultaneously, the three-phase neutral point CN of another termination filter capacitor of filter capacitor C51, the other end of smoothing reactor L53 connect one end of smoothing reactor L54 and one end of filter capacitor C52 simultaneously, the three-phase neutral point CN of another termination filter capacitor of filter capacitor C52, the other end of smoothing reactor L55 connects one end of smoothing reactor L56 and one end of filter capacitor C53 simultaneously, the three-phase neutral point CN of another termination filter capacitor of filter capacitor C53
The other end of smoothing reactor L52 connects one end of current sensor CT41, the other end of current sensor CT41 connects the drain electrode of insulated gate bipolar translator power tube T41 and the source electrode of insulated gate bipolar translator power tube T42 simultaneously, the source electrode of edge grid bipolar-type power pipe T41 connects one end of electric capacity C41 simultaneously, one end of voltage sensor TV1, one end of DC bus filter capacitor CO, one end of high-frequency filter capacitor C31, one end of high-frequency filter capacitor C37, the source electrode of insulated gate bipolar translator power tube T37 and the source electrode of insulated gate bipolar translator power tube T31, the drain electrode of insulated gate bipolar translator power tube T42 connects the other end of electric capacity C41 simultaneously, the other end of voltage sensor TV1, the other end of high-frequency filter capacitor C31, the drain electrode of insulated gate bipolar translator power tube T32 and one end of electric capacity C32,
One end of current sensor CT31 connects the drain electrode of insulated gate bipolar translator power tube T31 and the source electrode of insulated gate bipolar translator power tube T32 simultaneously; The other end of current sensor CT31 connects one end of smoothing reactor L31,
The other end of smoothing reactor L54 connects one end of current sensor CT42, the other end of current sensor CT42 connects the drain electrode of insulated gate bipolar translator power tube T43 and the source electrode of insulated gate bipolar translator power tube T44 simultaneously, and the source electrode of insulated gate bipolar translator power tube T43 connects one end of high-frequency filter capacitor C33, one end of high-frequency filter capacitor C42 and the source electrode of insulated gate bipolar translator power tube T33 simultaneously; The drain electrode of insulated gate bipolar translator power tube T44 connects one end of the other end of electric capacity C42, the other end of high-frequency filter capacitor C33, the drain electrode of insulated gate bipolar translator power tube T34 and electric capacity C34 simultaneously;
One end of current sensor CT32 connects the drain electrode of insulated gate bipolar translator power tube T33 and the source electrode of insulated gate bipolar translator power tube T34 simultaneously; The other end of current sensor CT32 connects one end of smoothing reactor L32;
The other end of smoothing reactor L56 connects one end of current sensor CT43, the other end of current sensor CT43 connects the drain electrode of insulated gate bipolar translator power tube T45 and the source electrode of insulated gate bipolar translator power tube T46 simultaneously, the source electrode of insulated gate bipolar translator power tube T45 connects one end of one end high-frequency filter capacitor C35 and the source electrode of insulated gate bipolar translator power tube T35 of high frequency capacitance C43 simultaneously
The drain electrode of insulated gate bipolar translator power tube T46 connects one end of the other end of electric capacity C43, the other end of high-frequency filter capacitor C35, the drain electrode of insulated gate bipolar translator power tube T36 and high frequency capacitance C36 simultaneously;
One end of current sensor CT33 connects the drain electrode of insulated gate bipolar translator power tube T35 and the source electrode of insulated gate bipolar translator power tube T36 simultaneously; The other end of current sensor CT33 connects one end of smoothing reactor L33,
The other end of DC bus filter capacitor CO connects one end of the other end of high-frequency filter capacitor C37, the drain electrode of insulated gate bipolar translator power tube T38, one end of one end of high-frequency filter capacitor C38 and high frequency capacitance C36, one end of high frequency capacitance C34, one end of high frequency capacitance C34, one end of voltage sensor TV2 and insurance F7 simultaneously
One end of current sensor CT34 connects the drain electrode of insulated gate bipolar translator power tube T37 and the source electrode of insulated gate bipolar translator power tube T38 simultaneously, the other end of current sensor CT34 connects one end of smoothing reactor L34, the other end of smoothing reactor L34 connects the other end of the smoothing reactor L31 of smoothing reactor L31 simultaneously, the other end of high-frequency filter capacitor C32, the other end of smoothing reactor L32, the other end of high-frequency filter capacitor C34, the other end of smoothing reactor L33, the other end of high-frequency filter capacitor C36, the other end of high-frequency filter capacitor C38, the other end of voltage sensor TV2 and one end of insurance F6,
The other end of insurance F6 connects one end of a switch in isolating switch QF2, and the other end of this switch connects one end of voltage sensor VT3, one end of discharge control switch SW2 and one end of super capacitor CSC simultaneously,
The other end of insurance F7 connects one end of another switch in isolating switch QF2 simultaneously, the other end of this switch connects the other end of the other end of voltage sensor VT3, one end of resistance R2 and super capacitor CSC simultaneously, and the other end of resistance R2 connects the other end of discharge control switch SW2;
The grid of the grid of insulated gate bipolar translator power tube T41, the grid of insulated gate bipolar translator power tube T42, insulated gate bipolar translator power tube T43, the grid of insulated gate bipolar translator power tube T44, the grid of insulated gate bipolar translator power tube T45 and the grid of insulated gate bipolar translator power tube T46 are all connected the drive singal output of No. two control boards 42;
The drive singal output of a control board 32 connects the grid of the grid of insulated gate bipolar translator power tube T31, the grid of insulated gate bipolar translator power tube T32, the grid of insulated gate bipolar translator power tube T33, the grid of insulated gate bipolar translator power tube T34, the grid of insulated gate bipolar translator power tube T35, the grid of insulated gate bipolar translator power tube T36, the grid of insulated gate bipolar translator power tube T37 and insulated gate bipolar translator power tube T38 simultaneously;
Current sensor CT31 collection signal end connects the current acquisition signal input part of current sensor CT32 collection signal end, current sensor CT33 collection signal end, current sensor CT34 collection signal end and a control board 32 simultaneously,
The voltage acquisition signal output part of voltage sensor TV2 connects the converted voltage signal input part of a control board 32, and the voltage acquisition signal output part of voltage sensor TV1 connects the inversion/rectified voltage signal input part of a control board 32,
Insulating power supply 7 is a control board 32 simultaneously, PAC controller 12 and No. two control boards 42 are powered;
A control board 32 charge and discharge control signal input charging and discharging state feedback signal output connects the charge and discharge control signal output charging and discharging state feedback signal input terminal of PAC controller 12, the power network current signal of the power network current signal input current changeover control signal output connection PAC controller 12 of No. two control boards 42 inputs out current conversion control signal input
The collection signal input of PAC controller 12 gathers the collection signal output collection control signal input of control signal output connection mode analog quantity collection plate 11; The collection signal input of analog acquisition plate 11 connects the collection signal output of voltage sensor VT3;
The switch controlling signal input of the switch controlling signal output connecting valve template 13 of PAC controller 12, switch template 14 is for controlling three-phase isolation switch QF1, three-phase air switch KM1 and isolated switch QF2.
PAC controller adopts XP-8741-ATOM, control unit 1 also comprises bus module CAN-8423CAN, PAC controller, a control board and No. two control boards are all articulated on bus module CAN-8423CAN, digital quantity input I-8041W, digital output I-8040PW and analog input I-8014.
PAC controller XP-8741-ATOM adopts Intel ATOMZ500 Series CPU (32-bit), be equipped with the flash memory of 1GB internal memory and 8GB, there is the SRAM of two Ethernet interfaces, the interface of four USB2.0, duplicate supply input, two house dogs and double cell standby, adopt WindowsEmbedded Standard 2009 operating system; CAN-8423CAN a kind ofly has tight security and effectively supports the serial communication bus that distributing controls in real time,
Super capacitor selects the 2.7V monomer ultracapacitor of U.S. Maxwell to realize high voltage by connection in series-parallel form.In multiple DC/DC unit 3, power switch selects Infineon's product, in a control board, digital signal processor DSP realizes the control to power switch pipe, the TMS320F28XX family chip of a control board employing TI company in the present embodiment, voltage sensor VT2 selects the Hall high-precision sensor of LEM, DC bus filter capacitor adopts multiple electrochemical capacitor connection in series-parallel to realize, and the 1000A Hall current sensor of LEM selected by current sensor.In four-quadrant rectification/inversion unit 4, power switch selects Infineon's product, in No. two control boards, digital signal processor DSP realizes the control to power switch pipe, the present embodiment No. two control boards adopt the TMS320F28XX family chip of TI company, and the 1000A Hall current sensor of LEM selected by current sensor.
Embodiment three, present embodiment are further illustrating the natural gas power station impact load dynamic compensating device described in embodiment two, Main Control Unit 1 also comprises touch-screen 14, and the control signal output display signal input part of described touch-screen 14 connects the control signal input display output of PAC controller 12.
Embodiment four, present embodiment are further illustrating the natural gas power station impact load dynamic compensating device described in embodiment two, and Main Control Unit 1 also comprises wireless transmitter 15; The wireless receiving and dispatching control signal input data output end of described wireless transmitter 15 connects PAC controller 12 wireless receiving and dispatching control signal and exports data input pin.
Embodiment five, present embodiment adopt natural gas power station impact load dynamic compensating device described in embodiment one to realize the method for dynamic compensation, and the concrete steps of the method are:
Step one: open that insulating power supply is multiple DC/DC unit 3, four-quadrant rectification/inversion unit 4 and the main control unit 1 based on PAC are powered, Main Control Unit 1 carries out setting parameter according to natural gas power station and load to natural gas power station impact load dynamic compensating device;
The parameter of described setting comprises the rated voltage, the rated current of compensation arrangement output, the rated power of compensation arrangement output, the closed loop control parameters of four-quadrant rectification/inversion unit 4 that export compensation arrangement, the closed loop control parameters of four-quadrant rectification/inversion unit 4 described in the charging and discharging closed loop control parameters of multiple DC/DC unit 3 comprises proportional gain and the storage gain of current closed-loop PI controller, and the charging and discharging closed loop control parameters of multiple DC/DC unit 3 comprises proportional gain and the storage gain of current closed-loop PI controller;
Step 2: when the switch of power station network information detecting unit 6 closes a floodgate, the DC bus-bar voltage in multiple DC/DC unit 3 arrives predetermined value; Multiple DC/DC unit 3 pairs of energy-storage units 2 charge; (this predetermined value is 80% of DC bus rated voltage; )
Step 3: Main Control Unit 1 controls four-quadrant rectification/inversion unit 4 and works in PWM (pulse width modulation) rectification mode, multiple DC/DC unit 3 works in Buck chopping mode, charge to energy-storage units 2, until the voltage rise of the super capacitor of energy-storage units 2 stops charging to during predetermined value, power station network information detecting unit 6 starts to detect the load in natural gas power station;
Buck chopping mode is buck chopper pattern, and realize the decompression transformation of DC bus-bar voltage to energy-storage units, now electric current flows to super capacitor by DC bus, reaches to the object of super capacitor charging;
Boost chopping mode is boost chopper pattern, and realize the boosting inverter of energy-storage units to DC bus-bar voltage, at this moment electric current flows to DC bus by super capacitor, reaches the object of being discharged by super capacitor;
Step 4: when impact load appears in natural pneumoelectric station, Main Control Unit 1 calculates the power stage of adjustment four-quadrant rectification/inversion unit 4 according to the Adaptive Compensation Control of impact load, and make multiple DC/DC unit 3 work in Boost pattern, realize fixing DC bus-bar voltage constant, realize the compensation to impact load dynamic active power;
Step 5: when the rated value of power total current beyond compensation arrangement output current that four-quadrant rectification/inversion unit 4 exports, Main Control Unit 1 distributes control algolithm automatically according to P/Q capacity, calculate transition to gain merit offset current and reactive power compensation electric current, control four-quadrant rectification/inversion unit 4 and preferentially export transition active power, output reactive power simultaneously; Realize the compensation of transient current dynamic active power when natural gas power station is occurred;
Step 6: when natural pneumoelectric station exists nonlinear load, Main Control Unit 1 receives control algolithm according to harmonic power, adjustment four-quadrant rectification/inversion unit 4 output harmonic wave electric current, make natural gas generator sine wave output electric current, realize receiving load harmonic power, the dynamic active power realized when there is nonlinear load to natural gas power station compensates.
After impact load dynamic compensation algorithm draws current-order, realize the control to system output power by the action of four-quadrant rectification/inversion unit 4, and then realize compensation arrangement output current adaptive tracing current-order.Here use the Hysteresis control of electric current, this method can realize the direct control to electric current, adopts PWM control technology to carry out Tracking Feedback Control to the instantaneous value of current waveform.Compared with indirectly controlling, the direct control of this electric current has response speed and higher control precision faster.Under this control method, in fact power compensation unit is equivalent to a controlled current source, by the detection to load current, can obtain the power current needing to compensate, regulate system power.
Embodiment six, present embodiment realize further illustrating of the method for dynamic compensation to the natural gas power station impact load dynamic compensating device described in embodiment five, and the controller unit 1 described in step 4 calculates the power stage of adjustment four-quadrant rectification/inversion unit 4 method according to the Adaptive Compensation Control of impact load is:
The load current i in natural gas power station is gathered by power station network information detecting unit 6
lOAD, gather compensation arrangement current i simultaneously
uPQC, to load current i
lOADwith compensation arrangement current i
uPQCcarry out abc/dq coordinate transform (three-phase static coordinate system abc/ two-phase synchronous rotating frame dq), obtain load active current i
qLOADwith compensation arrangement active current i
qUPQC; Load active current i
qLOADactive current high frequency transient component i is obtained by high-pass filtering
hp, Main Control Unit 1 controls four-quadrant rectification/inversion unit 4 and exports active current i
qUPQC=i
hp.
Embodiment seven, present embodiment realize further illustrating of the method for dynamic compensation to the natural gas power station impact load dynamic compensating device described in embodiment five, and the power total current that in step 5, four-quadrant rectification/inversion unit 4 exports is:
in formula, i
qUPQCfor compensating side active current; i
pUPQCfor compensating side reactive current;
When the rated value of power total current beyond compensation arrangement output current that four-quadrant rectification/inversion unit 4 exports; Transition offset current of gaining merit is: i
qUPQC;
Reactive power compensation electric current is:
Embodiment eight, present embodiment realize further illustrating of the method for dynamic compensation to the natural gas power station impact load dynamic compensating device described in embodiment five, in step 6, when natural pneumoelectric station exists nonlinear load, the load active current in natural gas power station is i
lOAD=i
lLOAD+ i
hLOAD, wherein i
lLOADfor load active current low-frequency component, i
hLOADfor load active current radio-frequency component;
Controller unit 1 receives control algolithm according to harmonic power, and adjustment four-quadrant rectification/inversion unit 4 output harmonic wave electric current is: i
uPQC+ i
hLOAD;
The load active current radio-frequency component of load is exported by compensation arrangement, the low frequency part of a natural gas generator output loading active current, natural gas generator sine wave output electric current.
The identification of supply network impact load and compensation principle:
By gathering natural gas power station load current i
lOADwith compensation side current i
uPQC, through abc/dq coordinate transform, take out load active current i
qLOADwith compensation side active current i
qUPQC.By load active current i
qLOADits active current high frequency transient component i is obtained by high pass filter
hp, master controller sends offset current instruction, makes i
qUPQC=i
hp, make to compensate side active current i
qUPQCchange by this command value, thus carry out dynamic active power compensation.The time constant filter τ of high pass filter determines duration and the amplitude of offset current.
Following current relationship is there is in natural gas power station power supply network:
i
qLOAD＝i
qDG+i
qUPQC(1)
I in formula
qLOADrepresent load active current, i
qDGrepresent that generator exports active current, i
qUPQCrepresent that impact dynamic compensation exports active current, therefore when the meritorious sudden change of load:
Δi
qLOAD＝Δi
qDG+Δi
qUPQC(2)
By the step total regression of single order high pass filter
known:
In formula | Δ i
qLOAD| be the transient changing amount of load current real component;
Formula (3) is substituted in formula (1) and obtains:
When the real component transient changing of bearing power, when namely the time is zero.
So:
Δi
qDG＝Δi
qLOAD-Δi
qUPQC＝0 (6)
From above formula, after compensation by realtime power real component, when the transient changing of bearing power real component, can not there is larger change in the electric current power component that generator exports, and that is generating set can not by the impact of bearing power real component transient changing.The power component of generating set output current in time Changing Pattern is:
Impact load bucking-out system of gaining merit gradually reduces output current in time with exponential rule, and the active component of current of generating set increases gradually thereupon.When reaching new steady s tate, the gain merit output current of bucking-out system of impact load is zero, and the real component of natural gas power station generator group output current is equal with load.
Δi
qDG＝Δi
qLOAD(8)
Therefore impact load gain merit bucking-out system have instantaneous power real component compensate self adaptation escape mechanism.
The configuration of super capacitor:
Above formula is the load voltage value U considering super capacitor, supply network voltage U
l, t is the time, and τ is the time constant filter of high pass filter, and the value of electric capacity can be determined by formula (9).
Claims (8)
1. natural gas power station impact load dynamic compensating device, it is characterized in that, this device comprises based on the main control unit (1) of PAC, energy-storage units (2), multiple DC/DC unit (3), four-quadrant rectification/inversion unit (4), LCL filter unit (5), power station network information detecting unit (6) and insulating power supply (7);
Power station network information detecting unit (6) is for detecting the three-phase current signal of natural gas power station power supply net, the current acquisition signal output part in power station network information detecting unit (6) connects the power network current collection signal input of four-quadrant rectification/inversion unit (4), the three-phase current signal in power station network information detecting unit (6) inputs to the three-phase current signal input of four-quadrant rectification/inversion unit (4) after LCL filter unit (5) filtering
Power network current signal input current changeover control signal output based on the main control unit (1) of PAC connects the power network current signal output current changeover control signal input of four-quadrant rectification/inversion unit (4), the energy storage signal output part of multiple DC/DC unit (3) connects the energy storage signal input part of energy-storage units (2), the charge and discharge control signal that the charge and discharge control signal input charging and discharging state feedback signal output of multiple DC/DC unit (3) connects based on the main control unit (1) of PAC exports charging and discharging state feedback signal input terminal, collection switch controlling signal output based on the main control unit (1) of PAC connects the collection switch controlling signal input in power station network information detecting unit (6), energy storage switch controlling signal output based on the main control unit (1) of PAC connects the energy storage switch controlling signal input of energy-storage units (2), described insulating power supply is used for for multiple DC/DC unit (3), four-quadrant rectification/inversion unit (4) and powering based on the main control unit (1) of PAC.
2. natural gas power station according to claim 1 impact load dynamic compensating device, it is characterized in that, control unit (1) comprises analog acquisition plate (11), PAC controller (12) and switch template (13);
Energy-storage units (2) comprises super capacitor CSC, discharge resistance R1, discharge control switch SW2, voltage sensor VT3, isolating switch QF2, insurance F6 and insurance F7; Isolating switch QF2 comprises two switches, and described two switches are linked switch,
Multiple DC/DC unit (3) comprises power switching modules CM31, power switching modules CM32, power switching modules CM33, power switching modules CM34, control board (32), voltage sensor TV1, voltage sensor TV2 and a DC bus filter capacitor CO;
Power switching modules CM31 comprises high-frequency filter capacitor C31, insulated gate bipolar translator power tube T31, insulated gate bipolar translator power tube T32, current sensor CT31, smoothing reactor L31 and high-frequency filter capacitor C32;
Power switching modules CM32 comprises high-frequency filter capacitor C33, insulated gate bipolar translator power tube T33, insulated gate bipolar translator power tube T34, current sensor CT32, smoothing reactor L32 and high-frequency filter capacitor C34;
Power switching modules CM33 comprises high-frequency filter capacitor C35, insulated gate bipolar translator power tube T35, insulated gate bipolar translator power tube T36, current sensor CT33, smoothing reactor L34 and high-frequency filter capacitor C36;
Power switching modules CM34 comprises high-frequency filter capacitor C37, insulated gate bipolar translator power tube T37, insulated gate bipolar translator power tube T38, current sensor CT34, smoothing reactor L34 and high-frequency filter capacitor C38;
Four-quadrant rectification/inversion unit (4) comprises four power switching modules, power switching modules CM41, power switching modules CM42, power switching modules CM43 and No. two control board (42);
Power switching modules CM41 comprises current sensor CT41, insulated gate bipolar translator power tube T41, insulated gate bipolar translator power tube T42 and high frequency wave electric capacity C41;
Power switching modules CM42 comprises current sensor CT42, insulated gate bipolar translator power tube T43, insulated gate bipolar translator power tube T44 and high frequency wave electric capacity C42;
Power switching modules CM43 comprises current sensor CT43, insulated gate bipolar translator power tube T45, insulated gate bipolar translator power tube T46 and high frequency wave electric capacity C43;
LCL filter unit (5) comprises smoothing reactor L51, smoothing reactor L52, smoothing reactor L53, smoothing reactor L54, smoothing reactor L55, smoothing reactor L56, filter capacitor C51, filter capacitor C52 and filter capacitor C53
Power station network information detecting unit (6) comprises three-phase isolation switch QF1, three-phase air switch KM1, voltage sensor VT61, voltage sensor VT62, insurance F61, insurance F62 and insurance F63;
Three-phase isolation switch QF1 and three-phase air switch KM1 is three-phase linked switch, three-phase isolation switch QF1 connects with three-phase air switch KM1, three-phase isolation switch QF1 three stiff ends connect the three phase mains in natural gas power station respectively, three movable ends of three-phase air switch KM1 are connected respectively by wave reactor L51, the smoothing reactor L53 of insurance F61, insurance F62 and insurance F63 and LCL filter unit (5) and smoothing reactor L55; The other end of wave reactor L51 connects one end of smoothing reactor L52 and one end of filter capacitor C51 simultaneously, the three-phase neutral point CN of another termination filter capacitor of filter capacitor C51, the other end of smoothing reactor L53 connect one end of smoothing reactor L54 and one end of filter capacitor C52 simultaneously, the three-phase neutral point CN of another termination filter capacitor of filter capacitor C52, the other end of smoothing reactor L55 connects one end of smoothing reactor L56 and one end of filter capacitor C53 simultaneously, the three-phase neutral point CN of another termination filter capacitor of filter capacitor C53
The other end of smoothing reactor L52 connects one end of current sensor CT41, the other end of current sensor CT41 connects the drain electrode of insulated gate bipolar translator power tube T41 and the source electrode of insulated gate bipolar translator power tube T42 simultaneously, the source electrode of edge grid bipolar-type power pipe T41 connects one end of electric capacity C41 simultaneously, one end of voltage sensor TV1, one end of DC bus filter capacitor CO, one end of high-frequency filter capacitor C31, one end of high-frequency filter capacitor C37, the source electrode of insulated gate bipolar translator power tube T37 and the source electrode of insulated gate bipolar translator power tube T31, the drain electrode of insulated gate bipolar translator power tube T42 connects the other end of electric capacity C41 simultaneously, the other end of voltage sensor TV1, the other end of high-frequency filter capacitor C31, the drain electrode of insulated gate bipolar translator power tube T32 and one end of electric capacity C32,
One end of current sensor CT31 connects the drain electrode of insulated gate bipolar translator power tube T31 and the source electrode of insulated gate bipolar translator power tube T32 simultaneously; The other end of current sensor CT31 connects one end of smoothing reactor L31,
The other end of smoothing reactor L54 connects one end of current sensor CT42, the other end of current sensor CT42 connects the drain electrode of insulated gate bipolar translator power tube T43 and the source electrode of insulated gate bipolar translator power tube T44 simultaneously, and the source electrode of insulated gate bipolar translator power tube T43 connects one end of high-frequency filter capacitor C33, one end of high-frequency filter capacitor C42 and the source electrode of insulated gate bipolar translator power tube T33 simultaneously; The drain electrode of insulated gate bipolar translator power tube T44 connects one end of the other end of electric capacity C42, the other end of high-frequency filter capacitor C33, the drain electrode of insulated gate bipolar translator power tube T34 and electric capacity C34 simultaneously;
One end of current sensor CT32 connects the drain electrode of insulated gate bipolar translator power tube T33 and the source electrode of insulated gate bipolar translator power tube T34 simultaneously; The other end of current sensor CT32 connects one end of smoothing reactor L32;
The other end of smoothing reactor L56 connects one end of current sensor CT43, the other end of current sensor CT43 connects the drain electrode of insulated gate bipolar translator power tube T45 and the source electrode of insulated gate bipolar translator power tube T46 simultaneously, the source electrode of insulated gate bipolar translator power tube T45 connects one end of one end high-frequency filter capacitor C35 and the source electrode of insulated gate bipolar translator power tube T35 of high frequency capacitance C43 simultaneously
The drain electrode of insulated gate bipolar translator power tube T46 connects one end of the other end of electric capacity C43, the other end of high-frequency filter capacitor C35, the drain electrode of insulated gate bipolar translator power tube T36 and high frequency capacitance C36 simultaneously;
One end of current sensor CT33 connects the drain electrode of insulated gate bipolar translator power tube T35 and the source electrode of insulated gate bipolar translator power tube T36 simultaneously; The other end of current sensor CT33 connects one end of smoothing reactor L33,
The other end of DC bus filter capacitor CO connects one end of the other end of high-frequency filter capacitor C37, the drain electrode of insulated gate bipolar translator power tube T38, one end of one end of high-frequency filter capacitor C38 and high frequency capacitance C36, one end of high frequency capacitance C34, one end of high frequency capacitance C34, one end of voltage sensor TV2 and insurance F7 simultaneously
One end of current sensor CT34 connects the drain electrode of insulated gate bipolar translator power tube T37 and the source electrode of insulated gate bipolar translator power tube T38 simultaneously, the other end of current sensor CT34 connects one end of smoothing reactor L34, the other end of smoothing reactor L34 connects the other end of the smoothing reactor L31 of smoothing reactor L31 simultaneously, the other end of high-frequency filter capacitor C32, the other end of smoothing reactor L32, the other end of high-frequency filter capacitor C34, the other end of smoothing reactor L33, the other end of high-frequency filter capacitor C36, the other end of high-frequency filter capacitor C38, the other end of voltage sensor TV2 and one end of insurance F6,
The other end of insurance F6 connects one end of a switch in isolating switch QF2, and the other end of this switch connects one end of voltage sensor VT3, one end of discharge control switch SW2 and one end of super capacitor CSC simultaneously,
The other end of insurance F7 connects one end of another switch in isolating switch QF2 simultaneously, the other end of this switch connects the other end of the other end of voltage sensor VT3, one end of resistance R2 and super capacitor CSC simultaneously, and the other end of resistance R2 connects the other end of discharge control switch SW2;
The grid of the grid of insulated gate bipolar translator power tube T41, the grid of insulated gate bipolar translator power tube T42, insulated gate bipolar translator power tube T43, the grid of insulated gate bipolar translator power tube T44, the grid of insulated gate bipolar translator power tube T45 and the grid of insulated gate bipolar translator power tube T46 are all connected the drive singal output of No. two control boards (42);
The drive singal output of a control board (32) connects the grid of the grid of insulated gate bipolar translator power tube T31, the grid of insulated gate bipolar translator power tube T32, the grid of insulated gate bipolar translator power tube T33, the grid of insulated gate bipolar translator power tube T34, the grid of insulated gate bipolar translator power tube T35, the grid of insulated gate bipolar translator power tube T36, the grid of insulated gate bipolar translator power tube T37 and insulated gate bipolar translator power tube T38 simultaneously;
Current sensor CT31 collection signal end connects the current acquisition signal input part of current sensor CT32 collection signal end, current sensor CT33 collection signal end, current sensor CT34 collection signal end and a control board (32) simultaneously,
The voltage acquisition signal output part of voltage sensor TV2 connects the converted voltage signal input part of a control board (32), the voltage acquisition signal output part of voltage sensor TV1 connects the inversion/rectified voltage signal input part of a control board (32)
Insulating power supply (7) is a control board (32), PAC controller (12) and No. two control board (42) power supplies simultaneously;
Control board (32) charge and discharge control signal input charging and discharging state feedback signal output connects the charge and discharge control signal output charging and discharging state feedback signal input terminal of PAC controller (12), the power network current signal of power network current signal input current changeover control signal output connection PAC controller (12) of No. two control boards (42) inputs out current conversion control signal input
The collection signal input of PAC controller (12) gathers the collection signal output collection control signal input of control signal output connection mode analog quantity collection plate (11); The collection signal input of analog acquisition plate (11) connects the collection signal output of voltage sensor VT3;
The switch controlling signal input of switch controlling signal output connecting valve template (13) of PAC controller (12), switch template (14) is for controlling three-phase isolation switch QF1, three-phase air switch KM1 and isolated switch QF2.
3. natural gas power station according to claim 2 impact load dynamic compensating device, it is characterized in that, Main Control Unit (1) also comprises touch-screen (14), and the control signal output display signal input part of described touch-screen (14) connects the control signal input display output of PAC controller (12).
4. natural gas power station according to claim 1 impact load dynamic compensating device, is characterized in that, Main Control Unit (1) also comprises wireless transmitter (15); The wireless receiving and dispatching control signal input data output end of described wireless transmitter (15) connects PAC controller (12) wireless receiving and dispatching control signal and exports data input pin.
5. adopt natural gas power station according to claim 1 impact load dynamic compensating device to realize the method for dynamic compensation, it is characterized in that, the concrete steps of the method are:
Step one: open that insulating power supply is multiple DC/DC unit (3), four-quadrant rectification/inversion unit (4) and the main control unit (1) based on PAC are powered, Main Control Unit (1) carries out setting parameter according to natural gas power station and load to natural gas power station impact load dynamic compensating device;
The parameter of described setting comprises the rated voltage exported compensation arrangement, the rated current that compensation arrangement exports, the rated power that compensation arrangement exports, the closed loop control parameters of four-quadrant rectification/inversion unit (4), described in the charging and discharging closed loop control parameters of multiple DC/DC unit (3), the closed loop control parameters of four-quadrant rectification/inversion unit (4) comprises proportional gain and the storage gain of current closed-loop PI controller, the charging and discharging closed loop control parameters of multiple DC/DC unit (3) comprises proportional gain and the storage gain of current closed-loop PI controller,
Step 2: the switch when power station network information detecting unit (6) closes a floodgate, the DC bus-bar voltage in multiple DC/DC unit (3) arrives predetermined value; Multiple DC/DC unit (3) is charged to energy-storage units (2);
Step 3: Main Control Unit (1) controls four-quadrant rectification/inversion unit (4) and works in PWM rectification mode, multiple DC/DC unit (3) works in Buck chopping mode, charge to energy-storage units (2), until the voltage rise of the super capacitor of energy-storage units (2) stops charging to during predetermined value, power station network information detecting unit (6) starts to detect the load in natural gas power station;
Step 4: when impact load appears in natural pneumoelectric station, Main Control Unit (1) calculates the power stage of adjustment four-quadrant rectification/inversion unit (4) according to the Adaptive Compensation Control of impact load, and make multiple DC/DC unit (3) work in Boost pattern, realize fixing DC bus-bar voltage constant, realize the compensation to impact load dynamic active power;
Step 5: when the rated value of the power total current that four-quadrant rectification/inversion unit (4) exports beyond compensation arrangement output current, Main Control Unit (1) distributes control algolithm automatically according to P/Q capacity, calculate transition to gain merit offset current and reactive power compensation electric current, control four-quadrant rectification/inversion unit (4) and preferentially export transition active power, simultaneously output reactive power; Realize the compensation of transient current dynamic active power when natural gas power station is occurred;
Step 6: when natural pneumoelectric station exists nonlinear load, Main Control Unit (1) receives control algolithm according to harmonic power, adjustment four-quadrant rectification/inversion unit (4) output harmonic wave electric current, make natural gas generator sine wave output electric current, realize receiving load harmonic power, the dynamic active power realized when there is nonlinear load to natural gas power station compensates.
6. natural gas power station according to claim 5 impact load dynamic compensating device realizes the method for dynamic compensation, it is characterized in that, the controller unit (1) described in step 4 calculates the power stage of adjustment four-quadrant rectification/inversion unit (4) method according to the Adaptive Compensation Control of impact load is:
The load current i in natural gas power station is gathered by power station network information detecting unit (6)
lOAD, gather compensation arrangement current i simultaneously
uPQC, to load current i
lOADwith compensation arrangement current i
uPQCcarry out abc/dq coordinate transform, obtain load active current i
qLOADwith compensation arrangement active current i
qUPQC; Load active current i
qLOADactive current high frequency transient component i is obtained by high-pass filtering
hp, Main Control Unit (1) controls four-quadrant rectification/inversion unit (4) and exports active current i
qUPQC=i
hp.
7. natural gas power station according to claim 5 impact load dynamic compensating device realizes the method for dynamic compensation, it is characterized in that, the power total current that in step 5, four-quadrant rectification/inversion unit (4) exports is:
in formula, i
qUPQCfor compensating side active current; i
pUPQCfor compensating side reactive current;
When the rated value of the power total current that four-quadrant rectification/inversion unit (4) exports beyond compensation arrangement output current; Transition offset current of gaining merit is: i
qUPQC
Reactive power compensation electric current is:
8. natural gas power station according to claim 5 impact load dynamic compensating device realizes the method for dynamic compensation, it is characterized in that, in step 6, when natural pneumoelectric station exists nonlinear load, the load active current in natural gas power station is i
lOAD=i
lLOAD+ i
hLOAD, wherein i
lLOADfor load active current low-frequency component, i
hLOADfor load active current radio-frequency component;
Controller unit (1) receives control algolithm according to harmonic power, and adjustment four-quadrant rectification/inversion unit (4) output harmonic wave electric current is: i
uPQC+ i
hLOAD;
The load active current radio-frequency component of load is exported by compensation arrangement, the low frequency part of a natural gas generator output loading active current, natural gas generator sine wave output electric current.
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| CN107394804A (en) * | 2017-08-30 | 2017-11-24 | 滁州市西控电子有限公司 | A kind of ultracapacitor impact load compensation system |
| CN107959424A (en) * | 2017-12-22 | 2018-04-24 | 北京交通大学 | The two-way isolated form high-gain DC-DC converter of parallel resonance formula |
| CN109991499A (en) * | 2019-04-19 | 2019-07-09 | 山东省产品质量检验研究院 | Detection device and method for reactive power compensator dynamic response and harmonics restraint |
| CN113217184A (en) * | 2021-06-18 | 2021-08-06 | 哈尔滨工业大学 | Dynamic energy adjusting system suitable for impact load of gas generator set |
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| CN107394804A (en) * | 2017-08-30 | 2017-11-24 | 滁州市西控电子有限公司 | A kind of ultracapacitor impact load compensation system |
| CN107959424A (en) * | 2017-12-22 | 2018-04-24 | 北京交通大学 | The two-way isolated form high-gain DC-DC converter of parallel resonance formula |
| CN107959424B (en) * | 2017-12-22 | 2019-09-03 | 北京交通大学 | The two-way isolated form high-gain DC-DC converter of parallel resonance formula |
| CN109991499A (en) * | 2019-04-19 | 2019-07-09 | 山东省产品质量检验研究院 | Detection device and method for reactive power compensator dynamic response and harmonics restraint |
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| CN113217184A (en) * | 2021-06-18 | 2021-08-06 | 哈尔滨工业大学 | Dynamic energy adjusting system suitable for impact load of gas generator set |
| CN113328445A (en) * | 2021-06-18 | 2021-08-31 | 哈尔滨工业大学 | Full-power compensation device for restraining nonlinear load from influencing performance of ship generator |
| CN113217184B (en) * | 2021-06-18 | 2022-07-05 | 哈尔滨工业大学 | Dynamic energy adjusting system suitable for impact load of gas generator set |
| CN114336660A (en) * | 2021-12-27 | 2022-04-12 | 江苏师范大学 | UPQC direct current prediction control method based on power angle |
| CN114336660B (en) * | 2021-12-27 | 2024-04-12 | 江苏师范大学 | UPQC direct current prediction control method based on power angle |
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