CN104065077A - Control method of series voltage compensation device - Google Patents
Control method of series voltage compensation device Download PDFInfo
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Abstract
The invention discloses a control method of a series voltage compensation device. The control method comprises the following steps: acquiring a reference rated voltage of a three-phase system, a load side three-phase voltage, and a filter inductive current at the AC side of an inverter unit through a data acquiring unit; calculating the difference between the three-phase voltage at the load side and the reference rated voltage of the three-phase system through a first error comparator, and treating the difference as the input of a proportion resonance regulator; calculating the difference between the output of the proportion resonance regulator set and the filter inductive current through a second error comparator, and treating the difference as the input of a proportion controller; accumulating the output of the proportion controller and the front feed of network voltage, and treating the product of the accumulated value and the DC voltage coefficient as IGBT (Insulated Gate Bipolar Translator) input of the inverter unit; accumulating the IGBT output of the inverter unit and the network voltage, and then controlling the load voltage. According to the control method of the series voltage compensation device, the design of combining the series compensation device and the DC voltage coefficient when a network suffers from a fault quickly and effectively ensures the stability of amplitude of the load port voltage.
Description
Technical Field
The present invention relates to power neighborhood, and more particularly, to a method for controlling a series voltage compensation device.
Background
The series voltage compensation device is independent of a power grid and a load, can be applied to a general energy consumption type load and an energy feedback type load, and is gradually valued by people as the series voltage compensation device is independent of a wind turbine generator and an access system and the compensation performance does not depend on the characteristics of the wind turbine when being applied to low voltage ride through compensation of the wind turbine. The device is connected in series between a load and a power grid, when a system is subjected to voltage drop, the device outputs compensation voltage, the voltage stability of the load side is ensured, the load is not influenced by the voltage drop of the system, and after the voltage drop disappears, active electric energy and reactive electric energy can be rapidly recovered to be sent out to the system.
The advantages and disadvantages of the inverter control method and the control system of the series voltage compensation device are directly related to the performance of the function realization and the safety and stability of the device. For a control algorithm of the inverter, analog PID control is adopted for the first time, and digital PID is gradually adopted along with popularization of a digital processor, but due to the influence of sampling and calculation delay in digital control, control signal output lags behind one sampling period, so that the stability of a system is poor, and meanwhile, parameter debugging is complex. The dead beat control is a control method based on a circuit model, the control accuracy of the dead beat control depends on the accuracy of system model estimation, and therefore the robustness of the system is poor. The dynamic performance of the repetitive controller is poor, the dynamic response speed of the system is low, and the dynamic performance of the repetitive controller needs to be improved by combining methods such as state feedback control and the like. In addition, sliding mode variable structure control, fuzzy control and the like exist, but due to factors such as complex control and the like, the control is in an experimental research stage.
Another major problem when applied to voltage compensation of energy feedback loads such as fans is the reliability of the device itself. Unlike general energy consumption load, when the low voltage of the fan occurs, the energy of the fan needs to be injected into the series compensation device, and if the fan is not controlled to a certain degree, the self-safety of the device can be endangered. At present, the research itself on the series-connection type fan low-voltage device is less, and part of documents propose to feed back part of energy to a power grid, but for short-time large current impact, higher requirements are put on control, and the reliability of the device is reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a control method of a series voltage compensation device, which has the advantages of high compensation precision, high response speed and harmonic compensation capability; and in addition, the safe and stable operation of the device is fully ensured on the basis of a control algorithm. Particularly, the control method adopts a double closed-loop control strategy based on a proportional resonant regulator group; and aiming at the problem of an energy backflow device of an energy feedback type load during a fault period, a design method of a direct current side voltage controller is also provided, so that the safe and stable operation of the series compensation device is ensured. The fundamental wave resonator ensures the precision and the steady-state performance of the voltage of the load port, and can effectively inhibit the influence of the power grid and load disturbance on the compensation performance by adding the harmonic wave resonator group aiming at the typical harmonic waves in the power grid and the load. Aiming at the fluctuation of the voltage on the direct current side, a direct current voltage coefficient is introduced to effectively restrain the fluctuation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method of a series voltage compensation device comprises the following specific steps:
A. obtaining a reference rated voltage of a three-phase system, a three-phase voltage at a load side and a filter inductance current at an alternating current side of an inverter unit through a data acquisition unit;
B. calculating the difference between the three-phase voltage at the load side and the reference rated voltage of the three-phase system through a first error comparator, and then using the difference as the input of a proportional resonant regulator group;
wherein, the proportional resonance regulator group mainly comprises a proportional link, a fundamental wave resonator and a harmonic wave resonator group,
the mathematical model of the set of proportional resonant regulators is as follows,
wherein, KpThe gain is proportional link gain, and the value range is 1-10; kiThe gain of the resonator is 10-100, the larger the gain is, the higher the precision is, but the stability of the system is reduced;
ωcutfor the shear frequency, omega, of the resonatorcutThe value range is 5-20;
ω0is the resonance frequency of the system fundamental wave;
h represents the waveform of the h time in the system, wherein when h is 1, the corresponding resonator is a fundamental wave resonator which is necessary in a control system and aims to increase the following characteristic of the system to a reference voltage command and simultaneously restrain real-time disturbance in a power grid and a load; when h is 3,5, …, the harmonic resonators are a group of harmonic resonators, the number and the number of the harmonic resonators should be added according to the general characteristics of the power grid, and the harmonic resonators are used for suppressing the disturbance of harmonic voltage or harmonic current in the power grid and the load;
C. calculating the difference between the output of the proportional resonant regulator group and the filter inductance current through a second error comparator, and then taking the difference as the input of the proportional controller;
D. the output of the proportional controller is accumulated with the feedforward of the power grid voltage, and then the product of the output and the direct-current voltage coefficient is used as the input of an IGBT in the inversion unit, and the output of the IGBT in the inversion unit and the accumulated power grid voltage control the load voltage;
the power grid voltage feedforward is introduced to increase the response of a system to voltage fluctuation, the value range of a feedforward coefficient is 0.5-2, the larger the value is, the faster the response speed of the control system to the voltage fluctuation is, but the stability of the system can be reduced;
the direct-current voltage control link is realized by introducing a direct-current voltage coefficient, and aims to effectively inhibit the influence of direct-current side voltage fluctuation on the inverter and improve the compensation precision of a compensation waveform.
By introducing a DC voltage coefficient KdcThe voltage of the direct current side is monitored and tracked in real time and sent to the control system. And D, multiplying the result of the step C by the product of the voltage and the result of the step C to control the port voltage of the load, so that the output voltage of the inverter is not influenced by the fluctuation of the voltage at the direct current side. Wherein, KdcThe design of (2) is as follows: the direct current voltage value under the rated working condition of the power grid and the corresponding direct current voltage coefficient KdcTaken as 1, when the DC side voltage rises by a times, KdcReducing the concentration to 1/a of the original concentration; when the DC side voltage is reduced to 1/a, KdcThe increase was a-fold higher than the original. KdcThe design purpose of (2) is: since the voltage fluctuation of the direct current side can directly influence the output waveform of the IGBT, the direct current side voltage coefficient K is introduceddcSince the product of the direct-current side voltage and the direct-current side voltage coefficient is 1 and is kept constant, the direct-current side voltage cannot be felt to fluctuate from the whole control system, and the robustness of the control system on fluctuation of the direct-current side voltage is effectively increased.
The control method further comprises the following steps:
and when the load property is judged to be an energy feedback type according to the direction of the load current, detecting the voltage at the direct current side in real time by the data acquisition unit, and performing hysteresis control on the voltage by the hysteresis controller.
The hysteresis controller comprises the following specific steps of:
setting a direct-current voltage reference value according to a direct-current side voltage value required by the compensation voltage of the inverter, and setting a hysteresis loop upper limit value and a hysteresis loop lower limit value on the basis;
when the voltage of the direct current side exceeds the set hysteresis loop upper limit value, a switch of a direct current side discharge loop is closed, a discharge resistor works, and the voltage of the direct current side begins to be reduced;
when the direct-current side voltage is reduced to a set hysteresis lower limit value, the direct-current side discharge circuit switch is switched off, and the direct-current voltage begins to rise at the moment.
Compared with the prior art, the control method of the series voltage compensation device has the following beneficial effects:
1) the data acquisition unit detects the voltage of a power grid, amplitude and phase information of the voltages of the three-phase A, B and C systems are obtained through a phase-locked loop PLL, and the phase information is calculated with a given value to obtain reference rated voltage of the three-phase system. Meanwhile, three-phase voltage and current information of a load side is collected to be used as input quantity of a control module unit;
2) the control unit realizes a designed control algorithm by a digital processing chip, the control algorithm mainly comprises a proportional resonance regulator group and a direct current side hysteresis controller, wherein the proportional resonance regulator group is defined as: proportional controller + a plurality of resonant regulator groups. The number and times of the resonance regulators are determined according to the voltage working condition of the power grid at the device, for example, the power grid contains 3,5,7 harmonic voltage or harmonic current, and the resonator group consists of a fundamental wave resonator and 3,5,7 harmonic wave resonators. The proportional resonant regulator group is used as an outer-loop controller of a double-closed-loop control strategy, the input of the proportional resonant regulator group is the difference between a reference rated voltage and the actual voltage of a load, and the proportional resonant regulator group is used for enabling the output to track a given reference as much as possible so as to improve the compensation precision of the system. Meanwhile, typical subharmonic disturbance in a power grid or a load is effectively suppressed by adding a harmonic resonator group. The output of the resonator is used as the instruction of the inner ring controller, the difference between the output of the resonator and the current signal collected by the inner ring is used as the input of the inner ring, and the output is directly acted on the inverter. Meanwhile, the response speed of the system can be effectively increased by adding the feed-forward of the power supply voltage. The control strategy is used for combining actions to finally input a control instruction to a controlled object.
And thirdly, as for the model of the inversion unit, modeling and controlling the model by a literature 'Xudhong' power electronic system [ M]Beijing: 2007:187-sMuch greater than the fundamental frequency f of the modulated signal0And when no overmodulation occurs, the fundamental wave signal and the low harmonic in the signal wave correspond to those in the inverter output voltageThe components having a fixed proportional relationship, i.e. KPWM＝Udc/UtWherein, UdcIs a DC side voltage, UtThe amplitude of the triangular wave. In fact, when the inverter unit is in operation, the dc side voltage is always fluctuating, by introducing a coefficient K related to the dc side voltagedcTherefore, the influence of the disturbance of the voltage on the direct current side on the output of the inverter is effectively inhibited.
And fourthly, aiming at the problem of the energy injection compensation device of the energy feedback type load, the direct current side hysteresis controller is arranged to mainly control the voltage of the direct current side and protect the safe operation of the device. The specific method comprises the following steps: the voltage and the load current of the direct current side are detected in real time through the data acquisition unit and are sent to the direct current side hysteresis controller. And judging whether the load property is an energy feedback type or not according to the direction of the load current. And if so, entering a hysteresis controller for control. When the voltage of the direct current side exceeds the set upper limit threshold value, the switch of the direct current side discharge circuit is closed, the discharge resistor works, and the voltage of the direct current side begins to be reduced; when the dc voltage decreases to the set lower threshold, the dc discharge circuit switch is turned off, and the dc voltage starts to increase. The above steps are repeated, and the effective control of the voltage on the direct current side is realized by comparing with the upper limit threshold value and the lower limit threshold value on the direct current side.
In a word, the control method of the series voltage compensation device of the invention provides a control method of a double closed-loop and feedforward controller based on a proportional resonant regulator group aiming at the series compensation device in the case of power grid failure, and combines the design of a direct current voltage coefficient, thereby being capable of rapidly and effectively ensuring the stability of the amplitude of the voltage of a load port; meanwhile, aiming at the redundant energy injected into the series compensation device by the energy feedback type load, an electronic switch is added in the device to control the hardware of a discharge resistor, and the on-off of the electronic switch is controlled by detecting the amplitude of the voltage on the direct current side of the load current direction machine. The control system is applied to the series low-voltage ride-through compensation device, so that the stability of the voltage of the load end is kept, and the stable and safe operation of the compensation device is ensured.
Drawings
Fig. 1 is a block diagram of an application of a series voltage compensation apparatus to which an embodiment of the present invention is directed;
FIG. 2 is a schematic diagram of a method of controlling the series voltage compensation apparatus of the present invention;
FIG. 3 is a block diagram of the transfer function of the closed loop control of FIG. 2;
FIG. 4 is a flow chart of the hysteresis control of FIG. 2;
fig. 5 is a Bode diagram of the frequency characteristic of the control method of the present embodiment, in which,
FIG. 5a is Gvref(s), Bode plot of closed loop output versus command tracking characteristics;
FIG. 5b is Gvs(s), Bode plot of the frequency characteristic of the closed loop output versus the suppression characteristic of the supply voltage disturbance;
FIG. 5c is GIL(s), a Bode plot of the closed-loop output versus the rejection characteristics of the load disturbances;
FIG. 6 is a Nyquist plot of the open loop transfer function at idle of the control system;
fig. 7 is a compensation waveform of the control method of the embodiment applied to the low voltage problem of the fan.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
Examples
Referring to fig. 1, in the case of normal grid voltage, the load current flows through the bypass switch of the series deviceOr the voltage flows out of the power grid, when the power grid has a low voltage problem, the bypass switch is disconnected, and the compensation device is connected between the load and the power grid in series. The control system designed herein is mainly directed to the inverter unit and the dc dump unit in the figure. The inverter unit mainly outputs compensation voltage of the inverter, the direct current discharging unit is composed of an electronic switch S and a discharging resistor, when S is closed, the discharging resistor and the direct current side form a loop, discharging is started, when S is disconnected, the resistor and the direct current side are disconnected, and discharging is not carried out. Wherein, ISIs the system current, ILFor load current, IINA filtered reactance current is output for the inverter.
Fig. 2 is a control block diagram of the entire control system. Analog quantity signals such as grid voltage, load current, direct-current side voltage of the inverter and the like of the three-phase system are sent to the signal acquisition unit through elements such as a voltage transformer, a current transformer, a Hall and the like, and corresponding digital quantity information is obtained after conditioning, filtering and AD sampling.
The digital quantity information is divided into two parts which are respectively sent to the designed closed-loop controller and hysteresis controller. The input of the closed-loop controller is analog quantities such as voltage and current of a system, voltage and current of a load, voltage and current of a direct current side and the like, and the output of the closed-loop controller is directly sent to an IGBT in an inverter, so that the voltage of a load port is effectively controlled to be kept stable. The input of the hysteresis controller is the voltage at the direct current side, the output of the hysteresis controller is sent to the direct current discharging unit in the figure 1, and the voltage value at the direct current side is effectively controlled by controlling the on-off of the direct current switch S.
Fig. 3 is a developed circuit of the closed-loop control part shown in fig. 2, namely, a double closed-loop control strategy based on a proportional resonant regulator group proposed by the present invention. The reference voltage is a rated value of the voltage of the three-phase system obtained through the phase-locked loop, the outer ring of the double closed-loop control system is a load voltage ring, and the controller is a proportional resonant regulator; the inner loop is an inductive current loop of the inverter, the controller is a proportional controller, and meanwhile, the control link is combined with power grid voltage feedforward control and a direct-current voltage control link.
The purpose for designing the controller includes: since the control target is the load voltage, the control of the outer ring is particularly important, and therefore, the outer ring controller is designed in detail here, so that the accuracy of the compensated voltage can be effectively ensured. The inner ring is introduced to increase the response speed of the system and increase the stability margin, so that the control requirement can be met by only adding a proportional controller, the value range of the proportional controller is generally 2-10, and within the range, the larger the value is, the faster the response speed of the system is, but the stability of the system is not good; the smaller the value, the opposite effect is. The introduction of the voltage feedforward of the power grid aims to increase the response of the system to voltage fluctuation, the value range of the feedforward coefficient is generally 0.5-2, the larger the value is, the faster the response speed of the control system to the voltage fluctuation is, but the stability of the system can be reduced. The direct-current voltage control link is realized by introducing a direct-current voltage coefficient, and aims to effectively inhibit the influence of direct-current side voltage fluctuation on the inverter and improve the compensation precision of a compensation waveform.
The mathematical model of the designed proportional resonance regulator group is as follows, and the model consists of a proportional link, a fundamental wave resonator and a harmonic resonator group:
Kpthe proportional link gain is in the range of 1-10; kiThe gain of the resonator is generally dozens to hundreds, and the larger the gain is, the higher the precision is, but the stability of the system is reduced; omegacutFor the shear frequency, omega, of the resonatorcutGenerally, the number is 5-20; omega0In practical application, the harmonic waves are added according to general characteristics of a power grid, for example, typical voltage or current harmonic waves contained in the power grid are 3,5,7 times of harmonic waves, and only resonators of corresponding 3,5,7 times and the like need to be added.
When h is 1, the corresponding resonator is a fundamental wave resonator which is necessary in a control system and aims to increase the following characteristic of the system to a reference voltage command and simultaneously restrain real-time disturbance in a power grid and a load; when h is 3,5, and …, the harmonic resonators are a group of harmonic resonators, and the number and the order of the harmonic resonators should be added according to the general characteristics of the power grid, so as to suppress the disturbance of harmonic voltage or harmonic current in the power grid and the load.
In the invention, the DC side voltage is treated as disturbance quantity, and the DC voltage coefficient K is designeddcAnd monitoring and tracking the voltage of the direct current side in real time and sending the voltage to the control system. The method comprises the following specific steps: the direct current voltage value under the rated working condition of the power grid and the corresponding direct current voltage coefficient KdcTaken as 1, when the voltage at the DC side risesAt a times higher, KdcReducing the concentration to 1/a of the original concentration; when the DC side voltage is reduced to 1/a, KdcThe increase was a-fold higher than the original. KdcThe design purpose of (2) is: since the voltage fluctuation of the direct current side can directly influence the output waveform of the IGBT, the direct current side voltage coefficient K is introduceddcBecause the product of the direct-current side voltage and the direct-current side voltage coefficient is 1 and is kept constant, the control output effect of the whole control system can not feel the fluctuation of the direct-current side, so that the output voltage of the inverter can not be influenced by the fluctuation of the direct-current side voltage, and the robustness of the control system is improved.
Fig. 4 is a detailed description of the hysteresis control in fig. 2, which is represented by a flow chart, and the voltage on the dc side is detected in real time by the data acquisition unit and sent to the hysteresis controller on the dc side. Defining load current I in control systemLIn the direction of (a): the direction of current flow from the grid to the load is in the positive direction. The controller judges whether the load property is energy consumption type (the direction is positive) or energy feedback type (the direction is negative) according to the direction of the load current; and if the load current direction is negative, entering a hysteresis controller for direct-current voltage control. Setting a DC voltage reference U according to a DC side voltage value required by the inverter compensation voltagedc0Then, the hysteresis upper limit value U is set based on the abovedc_UpperAnd a lower limit value Udc_Lower. When the DC side voltage UdcExceeds the upper limit threshold value U set by the devicedc_UpperWhen the voltage of the direct current side begins to decrease, the direct current side discharge loop switch S is closed, the discharge resistor works, and the direct current side voltage begins to decrease; when the DC side voltage UdcIs reduced to a set lower limit threshold value Udc_LowerAt this time, the dc side discharge circuit switch S is turned off, and the dc voltage starts to rise. During the fault period of the power grid, the actual direct-current voltage is circularly compared with the upper limit and the lower limit threshold of the direct-current side, so that the control of the voltage of the direct-current side is realized, and the stability of the compensating device is ensured.
The frequency characteristic of the control system of the present invention is shown in FIG. 5, in which graphs a, b, and c represent the load voltage V, respectivelyLFor reference voltage VrefVoltage of loadVLTo source voltage VSAnd a load voltage VLFor load current ILThe frequency characteristic corresponding to the transfer function. As can be seen from the frequency characteristic shown in the graph a, the output voltage can well track a given command (50Hz), and the steady-state error at the fundamental wave is small (the steady-state accuracy is 0.99), that is, the steady-state error of the system is 1% at this time, and the steady-state error of the system can be further reduced by increasing the resonator gain Ki. Namely, the control precision is higher; as can be seen from the frequency characteristic of the graph b, the system can well suppress various harmonics (3,5,7) in the grid voltage; as can be seen from the frequency characteristic of fig. c, the controller can suppress the harmonics (3,5,7) in the load current well. Thereby achieving the design effect.
The stability of the control system designed herein is determined by the open-loop transfer function of the system, and fig. 6 is an open-loop Nyquist plot of the system at idle, from which it can be seen that the Nyquist curve does not enclose the (-1,0j) point, and the system has no open-loop right pole, thus proving that the control system designed herein is stable.
Fig. 7 shows the compensation effect of the control method according to the present invention for the series fan low voltage ride through device, where channel 1 is the grid voltage, channel 2 is the compensated fan port voltage, channel 3 is the compensation voltage output by the inverter, and channel 4 is the dc side voltage of the hysteresis control. According to the compensation result, the control strategy can effectively control the port voltage of the fan, so that the fan is not influenced by the voltage drop of the power grid, and meanwhile, the hysteresis controller can effectively inhibit the voltage of the direct current side, so that the stable operation of the compensation device is ensured. The experimental results demonstrate the effectiveness of the proposed control method and control system.
It should be understood by those skilled in the art that the above embodiments are for illustrative purposes only and are not intended to limit the present invention, and that changes and modifications to the above embodiments may fall within the scope of the appended claims.
Claims (3)
1. A control method of a series voltage compensation device is characterized in that:
the control method comprises the following specific steps:
A. obtaining a reference rated voltage of a three-phase system, a three-phase voltage at a load side and a filter inductance current at an alternating current side of an inverter unit through a data acquisition unit;
B. calculating the difference between the three-phase voltage at the load side and the reference rated voltage of the three-phase system through a first error comparator, and then using the difference as the input of a proportional resonant regulator group;
wherein, the proportional resonance regulator group mainly comprises a proportional link, a fundamental wave resonator and a harmonic wave resonator group,
the mathematical model of the set of proportional resonant regulators is as follows,
wherein, KpThe gain is proportional link gain, and the value range is 1-10; kiThe gain of the resonator is 10-100, the larger the gain is, the higher the precision is, but the stability of the system is reduced;
ωcutfor the shear frequency, omega, of the resonatorcutThe value range is 5-20;
ω0is the resonance frequency of the system fundamental wave;
h represents the waveform of the h time in the system, wherein when h is 1, the corresponding wave is a fundamental wave resonator; when h is 3,5, …, the harmonic resonators are a group of harmonic resonators, the number and the number of the harmonic resonators should be added according to the general characteristics of the power grid, and the harmonic resonators are used for suppressing the disturbance of harmonic voltage or harmonic current in the power grid and the load;
C. calculating the difference between the output of the proportional resonant regulator group and the filter inductance current through a second error comparator, and then taking the difference as the input of the proportional controller;
D. the output of the proportional controller is accumulated with the feedforward of the power grid voltage, and then the product of the output and the direct-current voltage coefficient is used as the input of an IGBT in the inversion unit, and the output of the IGBT in the inversion unit and the accumulated power grid voltage control the load voltage;
wherein the value range of the feedforward coefficient is between 0.5 and 2.
2. The control method according to claim 1, characterized in that:
the control method further comprises the following steps:
and when the load property is judged to be an energy feedback type according to the direction of the load current, detecting the voltage at the direct current side in real time by the data acquisition unit, and performing hysteresis control on the voltage by the hysteresis controller.
3. The control method according to claim 2, characterized in that:
the hysteresis controller comprises the following specific steps of:
setting a direct-current voltage reference value according to a direct-current side voltage value required by the compensation voltage of the inverter, and setting a hysteresis loop upper limit value and a hysteresis loop lower limit value on the basis;
when the voltage of the direct current side exceeds the set hysteresis loop upper limit value, a switch of a direct current side discharge loop is closed, a discharge resistor works, and the voltage of the direct current side begins to be reduced;
when the direct-current side voltage is reduced to a set hysteresis lower limit value, the direct-current side discharge circuit switch is switched off, and the direct-current voltage begins to rise at the moment.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836257A (en) * | 2015-06-02 | 2015-08-12 | 中国农业大学 | Integrated low-voltage ride through regulation and control device of wind power generation |
| CN106505620A (en) * | 2016-11-25 | 2017-03-15 | 国家电网公司 | A Transient Reconfiguration System and Control Method for Improving Fault Ride-through Capability of Double-fed Fan |
| CN109599878A (en) * | 2018-12-07 | 2019-04-09 | 南京工程学院 | A kind of energy accumulation current converter control method towards electric energy quality optimizing demand |
| CN110752603A (en) * | 2019-09-23 | 2020-02-04 | 中国科学院电工研究所 | A composite control method, storage medium and device for series inverters |
| CN111416370A (en) * | 2020-03-18 | 2020-07-14 | 中国电建集团华东勘测设计研究院有限公司 | Converter device of battery energy storage power station and control method |
| CN114152801A (en) * | 2020-09-07 | 2022-03-08 | 青岛海尔洗衣机有限公司 | Electronic equipment control method and device and electronic equipment |
| CN114156897A (en) * | 2021-11-29 | 2022-03-08 | 广东电网有限责任公司 | Electric energy quality comprehensive regulation control system and control method |
| CN117096938A (en) * | 2023-10-19 | 2023-11-21 | 国网浙江省电力有限公司象山县供电公司 | Inverter output power quality adaptive control method and device and computer equipment |
| CN117559460A (en) * | 2023-11-17 | 2024-02-13 | 国网吉林省电力有限公司长春供电公司 | Middle-low voltage cloud edge cooperative voltage control method based on fusion terminal |
| CN118137511A (en) * | 2024-01-18 | 2024-06-04 | 吉林市瑞来科技发展有限公司 | Output voltage regulating and controlling device based on compensation control |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836257A (en) * | 2015-06-02 | 2015-08-12 | 中国农业大学 | Integrated low-voltage ride through regulation and control device of wind power generation |
| CN106505620A (en) * | 2016-11-25 | 2017-03-15 | 国家电网公司 | A Transient Reconfiguration System and Control Method for Improving Fault Ride-through Capability of Double-fed Fan |
| CN109599878A (en) * | 2018-12-07 | 2019-04-09 | 南京工程学院 | A kind of energy accumulation current converter control method towards electric energy quality optimizing demand |
| CN110752603A (en) * | 2019-09-23 | 2020-02-04 | 中国科学院电工研究所 | A composite control method, storage medium and device for series inverters |
| CN111416370A (en) * | 2020-03-18 | 2020-07-14 | 中国电建集团华东勘测设计研究院有限公司 | Converter device of battery energy storage power station and control method |
| CN114152801A (en) * | 2020-09-07 | 2022-03-08 | 青岛海尔洗衣机有限公司 | Electronic equipment control method and device and electronic equipment |
| CN114156897A (en) * | 2021-11-29 | 2022-03-08 | 广东电网有限责任公司 | Electric energy quality comprehensive regulation control system and control method |
| CN117096938A (en) * | 2023-10-19 | 2023-11-21 | 国网浙江省电力有限公司象山县供电公司 | Inverter output power quality adaptive control method and device and computer equipment |
| CN117096938B (en) * | 2023-10-19 | 2024-03-12 | 国网浙江省电力有限公司象山县供电公司 | Inverter output power quality adaptive control method, device and computer equipment |
| CN117559460A (en) * | 2023-11-17 | 2024-02-13 | 国网吉林省电力有限公司长春供电公司 | Middle-low voltage cloud edge cooperative voltage control method based on fusion terminal |
| CN118137511A (en) * | 2024-01-18 | 2024-06-04 | 吉林市瑞来科技发展有限公司 | Output voltage regulating and controlling device based on compensation control |
| CN118137511B (en) * | 2024-01-18 | 2024-11-22 | 吉林市瑞来科技发展有限公司 | Output voltage control device based on compensation control |
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