CN110350538B - Micro-grid coordination control method based on active demand side response - Google Patents

Micro-grid coordination control method based on active demand side response Download PDF

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CN110350538B
CN110350538B CN201910720565.XA CN201910720565A CN110350538B CN 110350538 B CN110350538 B CN 110350538B CN 201910720565 A CN201910720565 A CN 201910720565A CN 110350538 B CN110350538 B CN 110350538B
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load
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CN110350538A (en
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罗潇
邵宇鹰
彭鹏
俞玮
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Shanghai Yangpu District Shendian Advanced School
State Grid Shanghai Electric Power Co Ltd
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State Grid Shanghai Electric Power Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
    • H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation

Abstract

The invention discloses a micro-grid coordination control method based on active demand side response, which comprises the following steps: step 1: the power consumption of the non-critical load is controlled by changing the voltage of the non-critical load, so that the power consumption curve of the non-critical load is synchronously changed along with the power generation curve of the new energy unit, and the power fluctuation caused by the power generation of the new energy is absorbed; the non-critical load is an electric device capable of normally operating under a certain amount of voltage fluctuation; step 2: and tracking the bus voltage of the microgrid system in real time, and stabilizing the bus voltage by adjusting the reactive power output of the new energy generator set. The method can promote the source grid charge storage cooperative optimization operation of the microgrid in an island operation state, reduce the capacity requirement of the energy storage device and effectively improve the economy and stability of the microgrid.

Description

Micro-grid coordination control method based on active demand side response
Technical Field
The invention relates to the technical field of micro-grids, in particular to a micro-grid coordination control method based on active demand side response.
Background
The distributed new energy power generation can effectively solve the problems of insufficient distribution capacity and over-low voltage of end users of the power distribution network, and meanwhile, the new energy power generation has better economy due to the advantages of being renewable and pollution-free. However, while the new energy power generation has many excellent characteristics, the new energy power generation also brings great challenges to the safe and stable operation and power quality of the power grid, wherein typical problems are uncertainty and randomness of the new energy power generation, and the characteristics can cause voltage and frequency fluctuation, so that the power quality problem of the power grid has a more complicated trend.
The micro-grid is a small power generation and distribution system composed of a distributed power supply, an energy storage device, an energy conversion device, a load, a monitoring and protection device and the like, wherein the energy storage device is applied to effectively solve the problem of power and voltage fluctuation caused by the grid connection of distributed new energy resources, and the consumption capacity of the power distribution network on the new energy resources is improved.
The microgrid is a key link for constructing an intelligent energy system and an urban energy internet, along with the improvement of new energy installed capacity, the microgrid has urgent need to have the characteristics of plug and play and island/grid-connected seamless switching, and the energy storage device is core equipment for ensuring the island seamless switching of the microgrid, but the microgrid is not widely popularized at present due to the fact that the price of the energy storage device is high.
Disclosure of Invention
The invention aims to provide a micro-grid coordination control method based on active demand side response, so as to promote micro-grid source grid charge storage cooperative optimization operation in an island operation state, reduce the capacity requirement of an energy storage device and effectively improve the economy and stability of a micro-grid.
In order to achieve the above object, the present invention provides a micro grid coordination control method based on active demand side response, which includes the following steps:
step 1: the power consumption of the non-critical load is controlled by changing the voltage of the non-critical load, so that the power consumption curve of the non-critical load is synchronously changed along with the power generation curve of the new energy unit, and the power fluctuation caused by the power generation of the new energy is absorbed; the non-critical load is an electric device capable of normally operating under a certain amount of voltage fluctuation;
step 2: and tracking the bus voltage of the microgrid system in real time, and stabilizing the bus voltage by adjusting the reactive power output of the new energy generator set.
In the micro-grid coordination control method based on active demand side response, step 1 is implemented by an intelligent load controller connected in series with the non-critical load; the intelligent load controller is a voltage source type inverter based on current control.
In the above micro-grid coordination control method based on active demand side response, the control system of the intelligent load controller includes a phase control loop and an amplitude control loop;
in the phase control loop, the intelligent load controller locks the intelligent load current I through a phase-locked loop0By a phase angle of, then with I0Is taken as a reference, the voltage V of the intelligent load controller is output by a phase angle calculatorSLPhase angle of (V)SLAnd I0Maintaining a phase difference of 90 degrees;
in the amplitude control loop, the intelligent load controller first calculates the bus current ISAnd then carrying out first judgment on a derivative result, and if the derivative result is greater than 0, controlling VSLPhase angle lag of I0The phase angle is 90 degrees; if the derivative result is less than 0, controlling VSLPhase angle lead of0The phase angle is 90 degrees; after one determination, ISThe derivative result of (a) is subjected to a second determination, and the control signal of the second determination is the non-critical load voltage V0If V is0Is within the allowable range, the output I is continuedSThe derivative result of (1), if V0If the effective value of (1) exceeds the allowable deviation range, outputting 0; the output signal of the quadratic decision device is finally calculated by a proportional-integral controller to finally output VSLThe amplitude of (d); last VSLThe phase angle signal and the amplitude signal are synthesized and input into an inverter of an intelligent load controller to realize VSLIs output.
In the micro-grid coordination control method based on active demand side response, step 2 is implemented by an intelligent inverter installed at the output end of the new energy unit.
In the above micro-grid coordination control method based on active demand side response, in the control system of the intelligent inverter, the branch current I of the new energy source unit is firstly converted through park transformationRIs decomposed into an active component IRdAnd a reactive component IRq(ii) a Then calculating I through active power control and reactive power controlRdAnd IRqWherein the input signal of the active power control is the voltage signal V of the DC capacitor of the intelligent inverterDCThen by calculating VDCFrom its nominal reference value VDC_REFThe difference value of the voltage of the direct current end of the inverter is obtained, and the deviation value is subjected to proportional integral calculation to obtain the branch current I of the new energy source unitRActive component reference value Id_ref(ii) a The input signal of reactive power control is bus voltage VSThen by calculating VSFrom its nominal reference value VS_REFThe deviation value of the bus voltage is obtained by the difference value, and the deviation value is subjected to proportional integral calculation to obtain the branch current I of the new energy source unitRReference value of reactive component Iq_ref(ii) a Finally calculate IRd、IRqAnd Id_ref、Iq_refAnd inputting the difference value into a proportional-integral calculator to obtain a control signal of the intelligent inverter, and finally realizing the current output of the intelligent inverter.
Compared with the prior art, the invention has the following beneficial effects:
the comprehensive control method provided by the invention can fully utilize the regulation capacity of the non-critical load, and can reduce the dependence of the micro-grid on a large-capacity energy storage device by absorbing the output fluctuation of the new energy source unit by utilizing part of the non-critical load.
Drawings
FIG. 1 is a diagram of a microgrid architecture;
FIG. 2 is a simplified smart load circuit diagram;
FIG. 3 is a microgrid architecture diagram;
FIG. 4 is a tidal flow diagram of a microgrid system;
FIG. 5 is a diagram of a smart inverter topology;
FIG. 6 is a simple control flow of the intelligent load controller;
FIG. 7 is a flow chart of the control of the intelligent inverter of the new energy unit;
FIG. 8 is a real-time power curve of an energy storage device;
FIG. 9 is a real-time electrical quantity curve of an energy storage device;
FIG. 10 is a microgrid power supply power curve;
FIG. 11 is a non-critical load power consumption curve;
FIG. 12 is a key load voltage curve;
fig. 13 is a non-critical load voltage curve.
Detailed Description
The invention will be further described by the following specific examples in conjunction with the drawings, which are provided for illustration only and are not intended to limit the scope of the invention.
The control method of the microgrid provided by the invention comprises two key control devices, namely an intelligent inverter for a new energy generator set and an intelligent load controller for a load side, and the specific system structure is shown in figure 1.
1.1 Intelligent load controller
An intelligent load controller is a core component of an active demand side response control method, and in a microgrid system shown in fig. 1, all loads are divided into critical loads and non-critical loads, wherein the critical loads are electric equipment needing stable voltage supply, and the non-critical loads are electric equipment capable of normally operating under certain voltage fluctuation, and comprise an air conditioner, a refrigerator, a boiler, a refrigerator and the like. The intelligent load controller is a voltage source type inverter based on current control, and a filter capacitor of the inverter is directly connected with a non-critical load in series to form a novel intelligent load structure. The basic working principle of the intelligent load controller is that the voltage of the non-critical load is changed by changing the voltage at the two ends of the filter capacitor and sending or absorbing reactive power, so that the power consumption of the non-critical load is dynamically adjusted, the power curve of the non-critical load is enabled to change synchronously along with the power generation curve of the new energy unit, the power fluctuation caused by the power generation of the new energy is absorbed, and the purpose of reducing the capacity requirement of the energy storage device is finally achieved.
A simplified circuit comprising an intelligent load controller is shown in fig. 2, which comprises a power supply, an intelligent load controller simplified to a voltage source, a non-critical load, and a critical load, assuming all loads are purely resistive loads.
The voltage vector formula of the circuit of fig. 2 is:
Figure GDA0002764498820000041
wherein the content of the first and second substances,
Figure GDA0002764498820000042
is the voltage of the power supply and,
Figure GDA0002764498820000043
is the non-critical load voltage and,
Figure GDA0002764498820000044
is the output voltage of the intelligent load controller.
The power balance formula of the circuit can be expressed as:
Figure GDA0002764498820000045
wherein, PinIs the input power of the power supply, R1And R2Resistance values, P, of non-critical and critical loads, respectively1And P2Power consumption of non-critical and critical loads, respectively.
From equation (2), it follows that when the intelligent load controller is running (i.e., V)SL≧ 0), the power consumption of the non-critical load can be controlled by changing the magnitude of the output voltage itself. The intelligent load controller is applied to a micro-grid system, the micro-grid system comprises a conventional generator set, a new energy generator set, an energy storage device, an intelligent load consisting of the intelligent load controller and a non-critical load, and a critical load, the architecture of the micro-grid system is shown in fig. 3, and the power flow is shown in fig. 4.
The power balance formula of the microgrid system in fig. 4 is as follows:
PG+PR+PS＝P1+P2 (3)
wherein, PGIs the output power, P, of a conventional unitRIs the output power, P, of the new energy unit1Is the power consumption, P, of the smart load2Is the power consumption of the critical load, PSIs the output power of the energy storage device when PSGreater than 0 indicates that the energy storage device is discharging, and when P isSLess than 0 indicates that the energy storage device is charging.
Rearranging the formula (3) to obtain the output power P of the energy storage deviceSEquation (4) can be derived for the target value:
PS＝-PG-PR+P1+P2 (4)
suppose that the power consumption of the smart load is when the smart load controller is turned off
Figure GDA0002764498820000051
When the intelligent load controller starts to run, the power consumption of the intelligent load is
Figure GDA0002764498820000052
Then, in the same time period T, the capacity requirements of the energy storage device in these two cases are:
Figure GDA0002764498820000053
Figure GDA0002764498820000054
wherein the content of the first and second substances,
Figure GDA0002764498820000055
is the capacity requirement of the energy storage device in the event that the intelligent load controller is turned off,
Figure GDA0002764498820000056
is the capacity of the energy storage device under the condition that the intelligent load controller is started to operateThe quantity requirement.
With the formula (5) and the formula (6), it is easy to find that the difference between the capacity requirements of the energy storage device in the two cases is:
Figure GDA0002764498820000057
since the non-critical load is a purely resistive linear load, it can be easily found in conjunction with fig. 2 and equation (2) that when the smart load controller is turned off, the voltage V of the non-critical load is0Equal to the supply voltage VSWhen the intelligent load controller starts to operate, the voltage V of the non-critical load0Is equal to
Figure GDA0002764498820000058
Meanwhile, because the intelligent load controller only outputs reactive power, the active power consumption of the load only completely equals to that of the non-critical load, and under two different working conditions, the power consumption of the intelligent load respectively is as follows:
Figure GDA0002764498820000059
Figure GDA00027644988200000510
it is easily found by comparing equation (8) and equation (9):
Figure GDA0002764498820000061
therefore, combining equation (7) and equation (10) can further yield:
Figure GDA0002764498820000062
formula (11) demonstrates that with the start-up operation of the intelligent load controller, the capacity requirement of the energy storage device in the microgrid system can be reduced, and the economy of the microgrid system is further improved.
1.2 Intelligent inverter
In the microgrid system comprising the intelligent load shown in fig. 1, not only the instability and intermittence of the output power of the new energy source unit will cause the fluctuation of the bus voltage, but also the reactive power output by the intelligent load controller will greatly affect the stability of the bus voltage, and adversely affect the operation of the critical load in the system. Aiming at the problem of voltage stability, the invention provides an intelligent inverter installed at the output end of a new energy generator set, wherein the intelligent inverter can track the bus voltage of a micro-grid system in real time and realize the control of the bus voltage by adjusting the reactive power output of the new energy generator set.
The topological structure of the intelligent inverter is shown in fig. 5, and the bus voltage is stabilized through dynamic reactive compensation by fully utilizing the reactive output capability of the new energy source unit.
2. Control strategy
The control method mainly achieves the purpose of reducing the capacity requirement of the energy storage device through the coordination control of the intelligent load controller and the intelligent inverter.
2.1 Intelligent load controller
The intelligent load controller can be regarded as a controlled voltage source, and the control flow is shown in fig. 6. The control target of the power-saving control device is the voltage of a non-critical load connected with the power-saving control device in series, the working principle is that the power consumption of the non-critical load is controlled by changing the voltage of the non-critical load, so that the power consumption curve of the non-critical load changes along with the output power curve of the new energy generator set, and finally the purpose of reducing the capacity requirement of the energy storage device is achieved.
The control system of the intelligent load controller is divided into two control loops, namely a phase control loop and an amplitude control loop. In the phase control loop, the controller locks the intelligent load current I through a phase-locked loop0By a phase angle of, then with I0Is taken as a reference, the voltage V of the intelligent load controller is output by a phase angle calculatorSLPhase angle of (V)SLAnd I0A phase difference of 90 degrees is maintained. In the amplitude control loop, the controller first calculates the bus current ISThe effective value of the energy source unit is derived, then the derivation result is judged for the first time, if the derivation result is more than 0, the output power of the new energy source unit is increased, and at the moment, the control V is used for controllingSLPhase angle lag of I0The phase angle is 90 degrees, the controller is capacitive, and non-critical load voltage V can be increased0And further increasing the power consumption of the non-critical load, if the derivative result is less than 0, indicating that the output power of the new energy unit is reduced, and controlling V at the momentSLPhase angle lead of0The phase angle is 90 degrees, the controller is inductive, and the non-critical load voltage V can be reduced0Thereby reducing the power consumption of non-critical loads; after one determination, ISThe derivative result of the first judgment is input into a second judgment system, and the control signal of the second judgment is a non-critical load voltage V0If V is0Is within an allowable range (generally, a non-critical load voltage deviation range is 0.8p.u. ≦ V)0Less than or equal to 1.2p.u.), the secondary judger continues to output ISThe derivative result of (1), if V0If the effective value of (1) exceeds the allowable deviation range, the secondary decision device outputs 0; the output signal of the quadratic decision device is finally input into a Proportional Integral (PI) controller, and the final output V is calculated by the PI controllerSLThe amplitude of (d); last VSLThe phase angle signal and the amplitude signal are synthesized and input into an inverter of an intelligent load controller to realize VSLIs output.
2.2 Intelligent inverter
The simple control flow of the intelligent inverter of the new energy generator set is shown in fig. 7, the intelligent inverter can track the bus voltage value in real time, and the stability of the bus voltage is improved through dynamic reactive compensation.
In the control system of the intelligent inverter, the branch current I of the new energy source unit is firstly converted by park transformationRIs decomposed into an active component IRdAnd a reactive component IRq. Then calculating I through active power control and reactive power controlRdAnd IRqWherein the output of the active power controlThe input signal is a voltage signal V of a direct current capacitor of the intelligent inverterDCThen by calculating VDCFrom its nominal reference value VDC_REFThe difference value of the voltage of the direct current end of the inverter is obtained, and the deviation value is subjected to proportional integral calculation to obtain the branch current I of the new energy source unitRActive component reference value Id_ref(ii) a The input signal of reactive power control is bus voltage VSThen by calculating VSFrom its nominal reference value VS_REFThe deviation value of the bus voltage is obtained by the difference value, and the deviation value is subjected to proportional integral calculation to obtain the branch current I of the new energy source unitRReference value of reactive component Iq_ref. Finally calculate IRd、IRqAnd Id_ref、Iq_refAnd inputting the difference value into a proportional-integral calculator to obtain a control signal of the intelligent inverter, and finally realizing the current output of the intelligent inverter.
3. Detailed description of the preferred embodiments
A simplified microgrid system is used to verify the comprehensive coordination control strategy provided by the invention, the structure of the microgrid system is consistent with that of fig. 1, and all data and results of the experiment are obtained through a Simulink simulation platform in MATLAB. The intelligent load controller and the intelligent inverter of the new energy unit are respectively used for controlling the load power and the bus voltage. The rated value of the bus voltage of the system is 220V, at the electricity utilization side, the load of the system comprises a key load and a non-key load, the rated power of the two types of loads is 4kW, the power factor is 0.97, and an intelligent load controller is directly connected in series with the non-key load to form a set of intelligent load system capable of actively responding; in the power supply test, a power supply of the system consists of a traditional power generator of 7kVA and a new energy source machine group of 3kVA, wherein the new energy source machine group comprises a set of intelligent inverters, and an ideal energy storage device model is connected in parallel on a bus and can be used for charging and discharging so as to maintain the power balance of an island microgrid.
As shown in fig. 8 to 13, in the test process, the intelligent load controller realizes the purpose of reducing the capacity requirement of the energy storage device by controlling the consumption of the non-critical load, and the intelligent inverter can stabilize the bus voltage of the microgrid by controlling the reactive power output of the new energy source unit. In order to verify the effect of the control method of the present invention, the experimental results include both the case of using and not using the integrated control method, wherein the blue curve represents the experimental results in the case of using the integrated control method, and the green curve represents the experimental results in the case of not using the integrated control method.
As can be seen from comparing fig. 8 and fig. 9, when the microgrid uses the integrated control method, the charge/discharge power and the real-time power of the energy storage device are both lower, because the voltage of the non-critical load is changed due to the dynamic reactive power compensation function of the intelligent load controller, so that the power consumption of the non-critical load changes in the same trend along with the power supply curve, and the non-critical load is used to absorb the power disturbance caused by the new energy source unit, thereby reducing the real-time charge/discharge power of the energy storage device, which is equivalent to directly reducing the capacity demand on the energy storage device.
By observing fig. 10 and fig. 11, it is easy to find that in fig. 10, the power supply power of the power supply of the microgrid has strong volatility due to the instability of the output of the new energy source unit, but after the comprehensive control method is used, as shown in fig. 11, the power consumption of the non-critical load is changed synchronously with the power output of the power supply, further proving the reason that the charging and discharging power of the energy storage device in fig. 8 is reduced.
Comparing the voltage quality of the critical load and the non-critical load in two test cases in fig. 12 and 13, where fig. 12 compares the voltage of the critical load, and since the critical load is directly connected in parallel to the microgrid bus, the voltage of the critical load is equal to the voltage of the microgrid bus, and when the integrated control method is used, the voltage fluctuation of the critical load is significantly higher than that of the non-integrated control method, because the dynamic reactive output of the intelligent load controller is only used for controlling the power consumption of the non-critical load, it is possible to further amplify the voltage fluctuation brought by the new energy unit, but the intelligent inverter performs reactive compensation for the fluctuation, and stabilizes the voltage fluctuation brought by the operation of the intelligent inverter, and finally controls the voltage of the critical load within an allowable range of ± 5%; in fig. 13, it is easy to find that after the integrated control method is used, the voltage fluctuation of the non-critical load is much higher than that of the non-critical load, because the intelligent load controller realizes the control of the power consumption of the non-critical load by changing the voltage of the non-critical load, and further absorbs the power fluctuation caused by the output of the new energy source unit, and reduces the charge and discharge power of the energy storage device.
In conclusion, the microgrid coordinated control method based on active demand side response provided by the invention fully excavates available resources at the power demand side, locally treats the power quality problem at the user side, promotes the application of a voltage regulating means based on the user load or distributed power supply active response technology, coordinates and treats the voltage problem at different levels, reduces the requirement of the microgrid on the capacity of an energy storage device, and improves the stability and the economy of the microgrid system.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.

Claims (3)

1. A micro-grid coordination control method based on active demand side response is characterized by comprising the following steps:
step 1: the power consumption of the non-critical load is controlled by changing the voltage of the non-critical load, so that the power consumption curve of the non-critical load is synchronously changed along with the power generation curve of the new energy unit, and the power fluctuation caused by the power generation of the new energy is absorbed; the non-critical load is an electric device capable of normally operating under a certain amount of voltage fluctuation;
step 2: the bus voltage of the microgrid system is tracked in real time, and the bus voltage is stabilized by adjusting the reactive power output of the new energy generator set;
step 1 is realized by an intelligent load controller connected with the non-critical load in series; the intelligent load controller is a voltage source type inverter based on current control;
the control system of the intelligent load controller comprises a phase control loop and an amplitude control loop;
in the phase control loop, the intelligent load controller locks the intelligent load current I through a phase-locked loop0By a phase angle of, then with I0Is taken as a reference, the voltage V of the intelligent load controller is output by a phase angle calculatorSLPhase angle of (V)SLAnd I0Maintaining a phase difference of 90 degrees;
in the amplitude control loop, the intelligent load controller first calculates the bus current ISAnd then carrying out first judgment on a derivative result, and if the derivative result is greater than 0, controlling VSLPhase angle lag of I0The phase angle is 90 degrees; if the derivative result is less than 0, controlling VSLPhase angle lead of0The phase angle is 90 degrees; after one determination, ISThe derivative result of (a) is subjected to a second determination, and the control signal of the second determination is the non-critical load voltage V0If V is0Is within the allowable range, the output I is continuedSThe derivative result of (1), if V0If the effective value of (1) exceeds the allowable deviation range, outputting 0; the output signal of the quadratic decision device is finally calculated by a proportional-integral controller to finally output VSLThe amplitude of (d); last VSLThe phase angle signal and the amplitude signal are synthesized and input into an inverter of an intelligent load controller to realize VSLIs output.
2. The microgrid coordinated control method based on active demand side response of claim 1, wherein the step 2 is realized by an intelligent inverter installed at the output end of the new energy source unit.
3. The microgrid coordinated control method based on active demand side response of claim 2, characterized in that in the control system of the intelligent inverter, the branch current I of the new energy source unit is firstly converted by park transformationRIs decomposed intoActive component IRdAnd a reactive component IRq(ii) a Then calculating I through active power control and reactive power controlRdAnd IRqWherein the input signal of the active power control is the voltage signal V of the DC capacitor of the intelligent inverterDCThen by calculating VDCFrom its nominal reference value VDC_REFThe deviation value of the DC end voltage of the inverter is obtained by the difference value, and the deviation value of the DC end voltage of the inverter is subjected to proportional integral calculation to obtain a branch current I of the new energy unitRActive component reference value Id_ref(ii) a The input signal of reactive power control is bus voltage VSThen by calculating VSFrom its nominal reference value VS_REFThe deviation value of the bus voltage is obtained by the difference value, and the deviation value of the bus voltage is subjected to proportional integral calculation to obtain the branch current I of the new energy source unitRReference value of reactive component Iq_ref(ii) a Finally calculate IRd、IRqAnd Id_ref、Iq_refAnd inputting the difference value into a proportional-integral calculator to obtain a control signal of the intelligent inverter, and finally realizing the current output of the intelligent inverter.
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