CN110912147B - Power grid voltage regulating method and device based on static var generator and readable storage medium - Google Patents
Power grid voltage regulating method and device based on static var generator and readable storage medium Download PDFInfo
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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
- H02J3/12—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
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- 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 utility model discloses a power grid voltage regulating method based on a static var generator, which comprises the following steps: s01, obtaining reactive power Q of load L And bus common connection point voltage value V s The method comprises the steps of carrying out a first treatment on the surface of the S02, calculating a preset voltage reference value V ref And V is equal to s A difference e (t) between them; s03, performing nonlinear PI regulation on e (t) to obtain an output Q of a voltage feedback closed-loop control link vs The method comprises the steps of carrying out a first treatment on the surface of the S04, will-Q L As the output quantity of the load reactive feed-forward open loop control link, obtaining the reactive output reference value Q of the static reactive generator ref So that the static var generator outputs a reference value Q according to the reactive power ref And outputting reactive power to realize the regulation of the voltage of the power grid. The utility model correspondingly discloses a power grid voltage regulating device corresponding to the regulating method. The utility model also correspondingly discloses a computer readable storage medium, on which a readable computer program is stored, which when being executed by a processor, implements the method as described above. The method, the device and the medium have the advantages of high adjusting speed, high precision and the like.
Description
Technical Field
The utility model mainly relates to the technical field of voltage regulation, in particular to a power grid voltage regulation method and device based on a static var generator and a readable storage medium.
Background
In partial industrial and mining enterprises with high energy consumption, high-power impact loads (such as rolling mills, arc furnaces and the like) are often installed; because of abrupt change of impact load, abrupt loading or unloading of the load can cause severe fluctuation and flickering of power grid voltage, and serious influence is caused on electricity safety. Therefore, the enterprises can install dynamic reactive power compensation devices with certain capacity, such as Static Var Generators (SVGs) or Static Var Compensators (SVCs), to compensate reactive power in the power grid, and stability of the power grid voltage is improved.
The static var generator SVG, also called static synchronous compensator (Static Synchronous Compensator, STATCOM for short), has been widely used in various industries at present because of its superior performance in various aspects such as response speed, stabilizing power grid voltage, reducing system loss, increasing transmission capacity, increasing transient voltage limit, reducing harmonics, and reducing occupied area. Therefore, research on a rapid dynamic response technology based on a Static Var Generator (SVG) to improve the stability of the power grid voltage and improve the electricity safety has important significance for industrial and mining enterprises with high-power impact loads.
At present, many applications are studied for regulating the grid voltage by using a dynamic reactive power compensation device; the dynamic reactive power compensation device mainly comprises SVG, SVC, magnetic control reactor and the like; the focus of pressure regulation studies is mainly in two aspects: firstly, calculating the required compensation dead quantity by directly detecting the change of the voltage of a power grid; and secondly, calculating reactive power required to be compensated by detecting the combination of the load reactive power and the bus reactive power, so as to stabilize the power grid voltage. In the first method, there are two implementation manners: one is that the voltage feedback value of the public connection point is compared with the given value thereof, and the generated difference value forms a reactive current instruction value after passing through a PI regulator and is used as a SVG reactive input reference value; another is to obtain a short circuit impedance of the power grid, calculate a gain value of the power grid using the determined short circuit impedance, and control the grid voltage level according to the calculated gain value by applying the gain value as a gain parameter in a voltage controller. In the second method, the load reactive power change is rapidly compensated by using load feedforward open-loop control, the compensation precision and dynamic characteristics are improved by using bus reactive power feedback closed-loop control, and the response speed to the voltage change caused by the load reactive power is improved by combining the two methods.
At present, the main patents and articles of the method for regulating the voltage of the power grid by using the dynamic reactive power compensation device are as follows:
(1) Patent of Beijing national energy gold electric technology Co., ltd. "dynamic reactive voltage regulator for high-voltage line and regulating method thereof
The utility model relates to a dynamic reactive voltage regulating device for a high-voltage line and a regulating method thereof, wherein the device comprises N magnetic control reactor branches, a fixed capacitor branch, a lightning arrester branch, an outdoor high-voltage drop-out fuse, an outdoor high-voltage line current transformer and a controller, wherein each magnetic control reactor branch consists of a magnetic control reactor and is provided with a current transformer; the nth magnetic control reactor branch is connected with the nth fixed capacitor branch in parallel and then is connected to an outdoor high-voltage bus through an nth outdoor high-voltage drop-out fuse; the outdoor high-voltage line current transformer is connected in series in an outdoor high-voltage bus loop; the current transformer of each magnetic control reactor branch circuit and the outdoor high-voltage line current transformer are connected with the input end of the controller, and the output end of the controller is connected with each magnetic control reactor. The utility model can realize dynamic compensation and smooth stepless regulation of reactive capacity, and has the advantages of no need of switching, safety, reliability and remarkable line loss energy conservation. In the patent, although the calculation of the instantaneous reactive power control algorithm is faster than that of the traditional period effective value algorithm, the dynamic response speed of the magnetic control reactor branch and the fixed capacitor branch in the system is slow and is more than hundred milliseconds.
(2) Method for controlling the voltage of a network, in accordance with the patent by the company of the group of wind systems of the vista
The utility model relates to a method for controlling a voltage level of a power supply grid operatively connected to an electric power source. The method comprises the following steps: determining a short circuit impedance of the power supply grid at a point of common coupling, calculating a gain value of the power supply grid using the determined short circuit impedance, and controlling the grid voltage level according to the calculated gain value by applying the gain value as a gain parameter in a voltage controller. The method according to the utility model may be implemented as a method for configuring a voltage controller for one go for all, or as a method for adaptively adjusting the gain of a voltage controller. The method needs to know the short-circuit impedance of the power grid and determine the corresponding gain value to adjust the voltage, and has the advantages of quick adjustment and poor precision, and for a dynamic reactive power compensation device, different parameters need to be matched according to different projects, so that the method has poor adaptability to a power supply system.
(3) STATCOM reactive generator based on constant voltage control strategy by limited responsibility company of southern China electric network
The utility model discloses a STATCOM reactive power generator based on a constant voltage control strategy, which comprises a variable-current chain consisting of a plurality of H-bridge power units with the same structure, wherein each variable-current chain is a phase, and each phase is connected in parallel on a power grid through a reactor; the sampling unit is used for collecting voltage or current signals on the bus side, the fluctuation condition of the bus voltage is tracked in real time, and when the bus voltage exceeds a rated range, the control unit is used for sending a control signal to the triggering unit to compensate the bus voltage, so that constant voltage control is realized. The STATCOM reactive power generator adopts constant voltage control, and has the functions of high response speed, stable power grid voltage, transient voltage limit improvement, harmonic wave reduction and the like. Because the constant voltage control adopts a pure integral regulating unit, the dynamic response is slower although the control precision is higher.
(4) Literature composite control method of static var compensator based on rapid equivalent susceptance calculation
A method of unbalance compensation of a static var compensator (static var compensator, SVC) is proposed. Aiming at the power compensation requirement under the unbalanced condition, an equivalent susceptance detection method based on a Buddy (fryze-buchholz-dependent block) algorithm is provided, so that the calculated amount of the system is effectively reduced; in order to improve the compensation performance of SVC, an open-loop and closed-loop compound control method is provided, and a simplex algorithm is utilized to dynamically adjust control parameters, so that the robustness of the system is improved, the compensation precision and compensation performance of SVC are greatly improved, the power balance of a three-phase system is realized, the voltage of a power grid is stabilized, and the power quality of a power supply system is improved. However, this method requires the detection of load current and is not applicable when there are multiple load branches in the power supply system. The reason is as follows: when N load branches exist in the power supply system, the SVC control system needs to detect CT of the N load branches, and the algorithm quantity is huge; meanwhile, in the actual situation, when N is larger, the hardware resource of the SVC control system also does not have the capability of detecting CT of all branches, and the method is not applicable. In addition, the method stabilizes the voltage by only realizing the complete compensation of negative sequence and reactive power on the bus, does not consider the voltage fluctuation caused by the impact active load change, and does not carry out closed-loop regulation on the voltage.
From the above analysis, the main problems in the various methods for implementing the SVG parallel operation are mainly represented by:
1. the partial method adopts direct detection of the voltage of the power grid, and the voltage is regulated by a PI regulator or a pure integral regulator, so that the method has higher control precision but slower dynamic response speed;
2. the partial method adopts a mode of directly detecting the voltage of a power grid and regulating the voltage by a nonlinear PI regulator, and the dynamic response speed of the method is improved compared with that of a method suitable for a pure PI regulator, but the method still has difficulty in treating the problem of voltage fluctuation caused by nonlinear impact load such as an electric arc furnace;
3. the method adopts a mode of feedforward open-loop control and feedback closed-loop control, so that the response speed is greatly improved, the method needs to detect load current, is not applicable when a plurality of load branches exist in a power supply system, and meanwhile, the method is reactive feedback closed-loop control on a bus and cannot adjust voltage change caused by active power.
4. The partial method adopts a magnetic control reactor to regulate the voltage in a mode of switching the capacitor FC, so that the speed is low;
5. part of the methods adopt SVC to regulate voltage, the speed is slower than that of adopting SVG to regulate voltage, and the SVC device can generate a certain amount of harmonic current to pollute the power grid.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: aiming at the technical problems existing in the prior art, the utility model provides a power grid voltage regulating method, a device and a readable storage medium based on a static var generator, which have high regulating speed and high regulating precision.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
the utility model provides a power grid voltage regulation method based on static var generator, includes load reactive feedforward open loop control link and voltage feedback closed loop control link, and specific steps are:
s01, obtaining reactive power Q of load L And bus common connection point voltage value V s ；
S02, calculating a preset voltage reference value V ref And the voltage value V s Between (a) and (b)Difference, i.e. adjustment error e (t) =v ref -V s ；
S03, performing nonlinear PI (proportional integral) adjustment on the adjustment error e (t) to obtain an output instruction Q of a voltage feedback closed-loop control link vs ；
S04, will-Q L As the output quantity of the load reactive feed-forward open loop control link, obtaining the reactive output reference value Q of the static reactive generator ref ＝-Q L +Q vs ＝Q SVG -Q s +Q vs So that the static var generator outputs a reference value Q according to the reactive power ref And outputting reactive power to realize the regulation of the voltage of the power grid.
Preferably, in step S01, a bus common connection point reactive power value Q is calculated s Current output reactive power value Q of static reactive power generator SVG To obtain the reactive power Q of the load L ＝Q s -Q SVG 。
Preferably, the voltage signal, the current signal and the current signal I of the static var generator are detected by detecting the bus common connection point SVG Thereby calculating the voltage value V s Reactive power value Q s And the current output reactive power value Q of the static reactive power generator SVG 。
Preferably, in step S03, the nonlinear PI adjustment is performed according to a nonlinear function K P [e(t)]＝a P +b P {1-sech[c P e(t)]Calculation of the proportional gain K P The method comprises the steps of carrying out a first treatment on the surface of the Wherein a is P 、b P 、c P Are positive real constants.
Preferably, in step S03, the nonlinear PI adjustment is performed according to a nonlinear function K i [e(t)]＝a i sech[c i e(t)]Calculating an integral coefficient K i Wherein a is i 、c i Are positive real constants.
Preferably, in step S04, the reactive output reference value Q ref After the reactive power/current conversion link, outputting a reactive power current reference value I ref To a stationary var generator.
Preferably, the reactive current reference value I ref Feeding currentAnd an inner loop control link for outputting corresponding reactive current to the static reactive generator.
The utility model correspondingly discloses a power grid voltage regulating device based on a static var generator, which comprises
A first module for obtaining load reactive power Q L And bus common connection point voltage value V s ；
A second module for calculating a preset voltage reference value V ref And the voltage value V s The difference between, i.e. the adjustment error e (t) =v ref -V s ；
The third module is used for carrying out nonlinear PI adjustment on the adjustment error e (t) to obtain an output instruction Q of the voltage feedback closed-loop control link vs ；
Fourth module for connecting-Q L As the output quantity of the load reactive feed-forward open loop control link, obtaining the reactive output reference value Q of the static reactive generator ref ＝-Q L +Q vs ＝Q SVG -Q s +Q vs So that the static var generator outputs a reference value Q according to the reactive power ref And outputting reactive power to realize the regulation of the voltage of the power grid.
The utility model also correspondingly discloses a computer readable storage medium, on which a readable computer program is stored, which is characterized in that the computer readable program realizes the power grid voltage regulating method based on the static var generator when being executed by a processor.
Compared with the prior art, the utility model has the advantages that:
according to the power grid voltage regulation method based on the static var generator, the load reactive feedforward open-loop control link and the voltage feedback closed-loop control link are combined, so that the precision is higher than that of a voltage regulation mode which simply adopts a load feedforward open-loop voltage regulation mode, and the regulation speed is higher than that of a voltage regulation mode which simply adopts a voltage feedback closed-loop voltage regulation mode; because the change of the voltage of the power grid can be caused by the reactive power or active power change of the load in the power supply system, the voltage fluctuation caused by the reactive power change of the load in the power supply system is quickly regulated by a load reactive power feedforward open loop control method; the voltage fluctuation caused by active change of a load in a power supply system is rapidly regulated through voltage feedback closed-loop control; the nonlinear PI regulator is adopted, the gain is small when the regulating error is small, and the gain is large when the regulating error is large, so that the nonlinear PI regulator has the characteristic of quick dynamic response, and is particularly suitable for a system with quick load change; the method can be matched with the control parameters without knowing the impedance characteristic of the power supply system, and has good universality.
According to the power grid voltage regulation method based on the static var generator, as the detection of the load reactive power does not need to be directly detected and calculated through CT of the load branch, the load reactive power is indirectly deduced through detecting the reactive power of PCC points (bus common connection points) and the SVG output reactive power, and the power grid voltage regulation method based on the static var generator can be suitable for a power supply system with a plurality of load branches with rapid change.
The power grid voltage regulating device based on the static var generator and the computer readable storage medium have the advantages described by the method.
Drawings
Fig. 1 is a voltage regulation control block diagram of the present utility model.
FIG. 2 (a) shows K in the present utility model P A graph of the variation.
FIG. 2 (b) shows K in the present utility model i A graph of the variation.
Fig. 3 is a wiring diagram of the SVG of the present utility model in a particular application.
Detailed Description
The utility model is further described below with reference to the drawings and specific examples.
As shown in fig. 1 to 3, the power grid voltage adjusting method based on the static var generator of the embodiment is applicable to a power supply system with nonlinear impact loads such as an arc furnace, and comprises a load reactive feed-forward open loop control link and a voltage feedback closed loop control link, and the specific method comprises the following steps:
s01, obtaining the total load reactive power Q of all load branches L And bus common connection point voltage value V s ；
S02, calculating a preset voltage reference value V ref And the voltage value V s The difference between, i.e. the adjustment error e (t) =v ref -V s ；
S03, performing nonlinear PI (proportional integral) adjustment on the adjustment error e (t) to obtain an output instruction Q of a voltage feedback closed-loop control link vs ；
S04, will-Q L As the output quantity of the load reactive feed-forward open loop control link, obtaining the reactive output reference value Q of the Static Var Generator (SVG) ref ＝-Q L +Q vs ＝Q SVG -Q s +Q vs So that the static var generator outputs a reference value Q according to the reactive power ref And outputting reactive power to realize the regulation of the voltage of the power grid.
According to the power grid voltage regulation method based on the static var generator, the load reactive feedforward open-loop control link and the voltage feedback closed-loop control link are combined, so that the precision is higher than that of a load reactive feedforward open-loop control mode, and the regulation speed is higher than that of a voltage feedback closed-loop control mode; the voltage fluctuation caused by the reactive power change of the load in the power supply system can be quickly regulated by a load reactive power feedforward open loop control method because the change of the power grid voltage is caused by the reactive power change or the active power change of the load in the power supply system; the voltage fluctuation caused by active change of a load in a power supply system is rapidly regulated through voltage feedback closed-loop control; the nonlinear PI regulator is adopted, the gain is small when the regulating error is small, and the gain is large when the regulating error is large, so that the nonlinear PI regulator has the characteristic of quick dynamic response, and is particularly suitable for a system with quick load change; the method can be matched with the control parameters without knowing the impedance characteristic of the power supply system, and has good universality.
In the present embodiment, the voltage signal, the current signal and the current signal I of the static var generator are detected through the common connection point (PCC point) of the bus SVG Thereby calculating the voltage value V s Reactive power value Q s And the current output reactive power value Q of the static reactive power generator SVG To obtain the reactive power Q of the load L ＝Q s -Q SVG The output quantity of the load reactive feed-forward open loop control link is-Q L ＝-(Q s -Q SVG ). Since the detection of load reactive power does not need to pass through CT straight of load branchThe detection calculation is performed, and the load reactive power is indirectly deduced by detecting the reactive power of the PCC point (bus common connection point) and the SVG output reactive power, so that the method can be applied to a power supply system with a plurality of fast-changing load branches, as shown in fig. 3.
In the present embodiment, when the load is changed drastically, the reference voltage value V ref And the voltage value V of the power grid s The difference value of (a) is large, namely the adjustment error e (t), and the output proportional gain of the PI regulator is required to be large at the moment so as to realize quick dynamic response; as the adjustment proceeds, a preset voltage reference value V ref And the voltage value V of the power grid s The difference e (t) of (c) is gradually reduced, and the proportional gain of the regulator is reduced in order to reduce the overshoot. Thus, a function based on a hyperbolic secant function can be constructed as the proportional gain K of the nonlinear PI regulator P Is shown below:
K P [e(t)]＝a P +b P {1-sech[c P e(t)]}
wherein a is P 、b P 、c P Is a positive real constant. When the error e (t) = ±infinity, K P Take the maximum value of a P +b P The method comprises the steps of carrying out a first treatment on the surface of the When e (t) =0, K P Take the minimum value as a P ；b P For K P Adjust c P Is adjustable in size K P Rate of change (search is a hyperbolic secant function), K P [e(t)]The function curve is shown in fig. 2 (a).
Integral gain parameter K i The main function of the integral control is to eliminate steady state errors of the system. When the reference voltage V is preset ref And the voltage value V of the power grid s When the difference e (t) of the response is larger, the integral gain is expected not to be too large, so that the response is prevented from generating oscillation, and the overshoot is reduced; whereas the desired integral gain increases when e (t) is smaller, which is advantageous for eliminating steady state errors of the system. According to the expected variation characteristic of the integral gain, the integral gain parameter K i The variation of (a) is shown in FIG. 2 (b), so that a function based on a hyperbolic secant function can be constructed as the integral coefficient K of the nonlinear PI regulator i Is shown below:
K i [e(t)]＝a i sech[c i e(t)]
wherein a is i 、c i Is positive real constant, K i The value range of (a) is (0, a) i ) When e (t) =0, K i Take the maximum value. Wherein c i Determines K i Is a degree of change in the speed of change.
In the present embodiment, in step S04, the reactive output reference value Q ref After the reactive power/current conversion link, outputting a reactive power current reference value I ref Sending to the current inner loop control link, and the current signal I SVG After comparison, the reactive current is input into SVG to output corresponding reactive current, and the regulation of the power grid voltage is completed.
The utility model also discloses a power grid voltage regulating device based on the static var generator, which comprises
A first module for obtaining load reactive power Q L And bus common connection point voltage value V s ；
A second module for calculating a preset voltage reference value V ref And the voltage value V s The difference between, i.e. the adjustment error e (t) =v ref -V s ；
The third module is used for carrying out nonlinear PI adjustment on the adjustment error e (t) to obtain an output instruction Q of the voltage feedback closed-loop control link vs ；
Fourth module for connecting-Q L As the output quantity of the load reactive feed-forward open loop control link, obtaining the reactive output reference value Q of the static reactive generator ref ＝-Q L +Q vs ＝Q SVG -Q s +Q vs So that the static var generator outputs a reference value Q according to the reactive power ref And outputting reactive power to realize the regulation of the voltage of the power grid.
The utility model also discloses a computer readable storage medium, on which a readable computer program is stored, which when being executed by a processor, implements the grid voltage regulation method based on the static var generator as described above.
The above is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the utility model without departing from the principles thereof are intended to be within the scope of the utility model as set forth in the following claims.
Claims (9)
1. The power grid voltage regulating method based on the static var generator is characterized by comprising a load reactive feedforward open-loop control link and a voltage feedback closed-loop control link, and specifically comprises the following steps of:
s01, obtaining reactive power Q of load L And bus common connection point voltage value V s ；
S02, calculating a preset voltage reference value V ref And the voltage value V s The difference between, i.e. the adjustment error e (t) =v ref -V s ；
S03, performing nonlinear PI (proportional integral) adjustment on the adjustment error e (t) to obtain an output instruction Q of a voltage feedback closed-loop control link vs ；
S04, will-Q L As the output quantity of the load reactive feed-forward open loop control link, obtaining the reactive output reference value Q of the static reactive generator ref ＝-Q L +Q vs ＝Q SVG -Q s +Q vs So that the static var generator outputs a reference value Q according to the reactive power ref Outputting reactive power to realize the regulation of the voltage of the power grid;
wherein Q is s Reactive power value Q of bus public connection point SVG And outputting a reactive power value for the static reactive power generator.
2. A method for regulating voltage of a static var generator based network according to claim 1, characterized in that in step S01, the bus common connection point reactive power value Q is calculated s Current output reactive power value Q of static reactive power generator SVG To obtain the reactive power Q of the load L ＝Q s -Q SVG 。
3. A method for regulating the voltage of a static var generator based network according to claim 2, characterized by detecting the voltage signal, the current signal of the bus common connection point and the current signal I of the static var generator SVG Thereby calculating the voltage value V s Reactive power value Q s And the current output reactive power value Q of the static reactive power generator SVG 。
4. A method for regulating the voltage of a static var generator based network according to claim 1 or 2 or 3, characterized in that in step S03, in the case of a nonlinear PI regulation, it is performed according to a nonlinear function K P [e(t)]＝a P +b P {1-sech[c P e(t)]Calculation of the proportional gain K P The method comprises the steps of carrying out a first treatment on the surface of the Wherein a is P 、b P 、c P Are positive real constants.
5. A method for regulating the voltage of a static var generator based network according to claim 1 or 2 or 3, characterized in that in step S03, in the case of a nonlinear PI regulation, it is performed according to a nonlinear function K i [e(t)]＝a i sech[c i e(t)]Calculating an integral coefficient K i Wherein a is i 、c i Are positive real constants.
6. A method of regulating the voltage of a static var generator based network according to claim 1 or 2 or 3, characterized in that in step S04, the reactive output reference value Q ref After the reactive power/current conversion link, outputting a reactive power current reference value I ref To a stationary var generator.
7. A method for regulating the voltage of a static var generator based network according to claim 6, characterized by the fact that the reactive current reference I ref And (3) sending the reactive current into a current inner loop control link, and outputting the corresponding reactive current to a static reactive generator.
8. A power grid voltage regulating device based on a static var generator is characterized by comprising
A first module for obtaining load reactive power Q L And bus common connection point voltage value V s ；
A second module for calculating a preset voltage reference value V ref And the voltage value V s The difference between, i.e. the adjustment error e (t) =v ref -V s ；
The third module is used for carrying out nonlinear PI adjustment on the adjustment error e (t) to obtain an output instruction Q of the voltage feedback closed-loop control link vs ；
Fourth module for connecting-Q L As the output quantity of the load reactive feed-forward open loop control link, obtaining the reactive output reference value Q of the static reactive generator ref ＝-Q L +Q vs ＝Q SVG -Q s +Q vs So that the static var generator outputs a reference value Q according to the reactive power ref Outputting reactive power to realize the regulation of the voltage of the power grid;
wherein Q is s Reactive power value Q of bus public connection point SVG And outputting a reactive power value for the static reactive power generator.
9. A computer readable storage medium, on which a readable computer program is stored, characterized in that the readable computer program, when executed by a processor, implements a method for regulating a voltage of a network based on a static var generator according to any of claims 1-7.
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