247 results about "Static var generator" patented technology

The invention relates to the technical field of power electronics, in particular to a control method for a low-voltage intelligent reactive compensation system of a submerged arc furnace. Comprising the following steps: acquiring three-phase voltage, current, power factor, harmonic content and temperature parameters of the low-voltage side of the submerged arc furnace through a sensor network; the load fluctuation of the submerged arc furnace in the future 1-5 minutes is predicted based on a deep learning algorithm, and a compensation demand pre-judgment value is generated; according to a load prediction result and a real-time working condition, performing dynamic switching from three modes of fixed compensation, grouped switching and continuous adjustment; harmonic component dynamic tracking compensation is carried out by combining an active power filter (APF) and a static var generator (SVG); the system overvoltage, overcurrent and temperature parameters are monitored in real time, and a grading protection mechanism is triggered and fed back to the compensation strategy adjusting module. The invention provides a control method for a low-voltage intelligent reactive compensation system of a submerged arc furnace so as to improve the response speed of the system, prolong the service life of equipment and guarantee the electric energy quality of a power grid.

The invention relates to the technical field of generator control, and particularly discloses an SVG static var generator control method and system, and the method comprises the steps: constructing a reactive-voltage sensitivity matrix containing a node sensitivity weight based on the real-time measurement data of a power grid, and obtaining a node sensitivity matrix; a dynamic sorting strategy of device priority grading is generated, a distributed compensation priority queue of all devices is obtained, and the devices comprise an SVG cluster and a photovoltaic inverter cluster; executing reactive power distribution under a capacity constraint condition based on the distributed compensation priority queue, and generating a target reactive power compensation amount with the capacity constraint condition; generating a hierarchical coordination control instruction of the SVG and the inverter according to the target reactive compensation amount, and obtaining a hierarchical control instruction set; executing the distributed cooperative compensation driven by the hierarchical control instruction set, and completing the dynamic regulation of the power grid voltage; the reactive power regulation capability of different devices in a power grid can be fully utilized, the accuracy and response speed of reactive power distribution are improved, and resource waste and excessive compensation are avoided.

The invention discloses a control method and system for improving SVG (Static Var Generator) disturbance signal generation precision, relates to the technical field of SVG disturbance signal generation, and solves the technical problem that a current disturbance signal generated by an SVG is difficult to meet the dynamic precision requirement required by multi-frequency impedance measurement. According to the technical scheme, disturbance signal attenuation caused by SVG direct-current voltage control is calculated through an observer, after phase compensation, the disturbance signal attenuation and a direct-current voltage given value are superposed to serve as outer loop input of a voltage controller, and the outer loop input is subtracted from direct-current voltage feedback; an outer ring output is obtained through a voltage controller of an outer ring and superposed with an instruction current disturbance signal to serve as an inner ring input of a current controller, and SVG operation is controlled through a current inner ring controller and a PWM modulation instruction. The influence of a direct-current voltage outer loop on actual current disturbance signals is remarkably reduced, and the SVG can still output accurate actual current disturbance signals when instruction current disturbance signals of all frequencies are injected into the SVG.

The invention provides an APF and SVG cooperative control-based electric energy quality comprehensive treatment system, and belongs to the technical field of intelligent power grid industry and electric energy quality comprehensive treatment, and the system comprises the steps of obtaining a power grid current signal and a voltage signal, and detecting a harmonic component and a voltage deviation through a harmonic detection module; a collaborative decision controller is adopted to determine a compensation strategy according to the harmonic component and the voltage deviation, and compensation tasks of an active power filter channel and a static var generator channel are distributed; harmonic compensation current is generated through an active power filter channel, and high-frequency harmonics are suppressed; reactive compensation current is generated through a static var generator channel, and voltage fluctuation is stabilized; and the compensation current is filtered through the filtering module and is output to a power grid. The electric energy quality comprehensive treatment system can effectively inhibit power grid harmonic waves, stabilize voltage fluctuation and improve electric energy quality, and is suitable for a complex power grid environment.

The invention discloses an H-bridge series-parallel active support type SVG system and a control method, and relates to the technical field of active support type SVGs, the H-bridge series-parallel active support type SVG system is formed by three-phase star connection of a chain structure, each phase is formed by connecting an H-bridge power module and a super capacitor power module in series, the H-bridge power module and the super capacitor power module are both controlled by the power control module; the H-bridge power module is used for providing reactive power support for the static var generator system and maintaining the stability of the voltage of the power grid by adjusting the reactive power injected into the power grid; and the super capacitor power module is used for providing active support for the static var generator system so as to realize frequency active support of the static var generator system to a power grid. According to the invention, the configuration scheme of the active support type SVG super capacitor is simplified, the overall configuration is more flexible, and the expandability is stronger.

The invention relates to a multi-modal oscillation suppression method and system for a network construction type power supply grid-connected system, belongs to the technical field of power system control, and solves the problem that multi-modal oscillation of a large-scale inversion type power supply grid-connected system cannot be cooperatively and rapidly suppressed. The method comprises the following steps: when a system generates broadband oscillation, collecting grid-connected point voltage and current signals of each power station to extract a dominant oscillation mode of each power station; constructing a modal coupling matrix based on the dominant oscillation mode to extract modal coupling strength; identifying a key path of oscillation propagation in the dominant oscillation mode, and extracting a path weight and a power station participation degree; calculating the comprehensive power regulation and control weight of each power generation station in multiple modes so as to determine the power regulation quantity; and distributing the power regulation quantity to an energy storage device, a static var generator (SVG) and each power generation station according to oscillation characteristics of different frequency bands so as to cooperatively suppress multi-modal oscillation. The active / reactive oscillation energy is cooperatively adjusted, so that the oscillation energy of each frequency band is effectively suppressed.

The invention discloses an enhanced SVG low voltage ride through method, and belongs to the technical field of electrical automation equipment, and the method comprises the steps: carrying out the three-phase voltage synthesis of a self-built voltage amplitude and a self-built voltage phase, and obtaining a current reference value through an electromagnetic square; according to the self-built voltage phase and the current reference value, a bridge arm differential mode voltage modulation wave is obtained through inner loop current control; obtaining a main circuit commutation actual value of the enhanced SVG, and obtaining a bridge arm common-mode voltage modulation wave through circulating current suppression control in combination with the self-built voltage phase; actual energy and rated energy of the enhanced SVG are obtained, and an energy modulation signal is obtained through an energy control ring; and after modulation is carried out according to the bridge arm differential mode voltage modulation wave, the bridge arm common mode voltage modulation wave and an energy modulation signal, a switching signal is generated to control the enhanced SVG, and low voltage ride through is realized. According to the invention, the problem that the enhanced SVG fails or is off-network under the condition of low voltage can be solved.

The invention provides a network construction control method and system for a static var generator without a super capacitor, and the method comprises the steps: obtaining a variable needed by the control of the static var generator, comprise a three-phase bridge arm voltage measurement value, a three-phase bridge arm voltage instruction value, a reactive power instruction value, an alternating voltage amplitude instruction value, an output reactive power measurement value, an output alternating current measurement value, an alternating voltage amplitude measurement value of a common coupling point, a direct-axis voltage measurement value and a quadrature-axis voltage measurement value; obtaining a three-phase modulation voltage through a voltage loop and an alternating current loop according to variables required by control and based on direct current voltage-frequency-phase control and reactive power-voltage droop control; and obtaining a switch tube control signal according to the three-phase modulation voltage, and completing network construction control of the static var generator according to the switch tube control signal. According to the invention, the stability of the DC voltage of the static var generator can be ensured without adding a super capacitor, and active support is provided for an AC side power grid.

The invention relates to the technical field of power system energy storage, in particular to a network construction type SVG (static var generator) device starting topological structure and a two-stage starting method thereof, comprising a starting loop and an energy storage type static var generator; the energy storage type static var generator comprises a modularized multi-level converter valve circuit and a super capacitor circuit. The modular multi-level converter valve circuit comprises an upper bridge arm and a lower bridge arm, and each of the upper bridge arm and the lower bridge arm comprises a plurality of half-bridge sub-modules which are connected in series; the modularized multi-level converter valve circuit is used for controlling energy conversion between an alternating current system and a direct current system and adjusting the voltage of a power grid by controlling a half-bridge sub-module. Each super-capacitor branch of the super-capacitor circuit comprises a plurality of super-capacitor sub-modules which are connected in series; and the super capacitor sub-module is used for storing energy and discharging. According to the two-stage starting method for starting the topological structure by the network-building type SVG device, stable starting and efficient charging of the network-building type SVG device containing the super capacitor are realized.

The invention provides a stability analysis method and system for an offshore wind power grid-connected system. The method comprises the following steps: acquiring real-time operation data of a wind turbine generator and a static var generator of the offshore wind power grid-connected system; inputting the real-time operation data into a preset impedance model of the offshore wind power grid-connected system, so that the impedance model of the offshore wind power grid-connected system calculates and obtains first equivalent impedance of the offshore wind power grid-connected system according to the real-time operation data, the impedance model of the offshore wind power grid-connected system is constructed according to an impedance model of each part of the offshore wind power grid-connected system; obtaining second equivalent impedance of the power grid according to a preset power grid harmonic impedance model or an actual power grid harmonic scanning value; and performing stability analysis on the offshore wind power grid-connected system according to the first equivalent impedance and the second equivalent impedance. The accuracy of stability judgment of the offshore wind power grid-connected system is improved.

The invention relates to the technical field of power electronic equipment, in particular to a network construction type SVG (static var generator) device of an integrated super capacitor, a control method of the network construction type SVG device and a medium, and the network construction type SVG device comprises three network construction type static var generator branches which are connected to a three-phase alternating-current bus in a triangular form, each network-forming static var generator branch comprises an inductor and a plurality of super-capacitance bridging modules which are connected in series, and the inductor is used for smoothing current waveforms of the super-capacitance bridging modules; the super-capacitor bridging module comprises a plurality of full-bridge sub-modules and a plurality of super-capacitor sub-modules which are connected in series; the super-capacitor sub-module comprises a full-bridge super-capacitor sub-module, an interface circuit and a super-capacitor unit; and the super-capacitor sub-module is used for regulating and controlling the energy storage state according to the charging and discharging instruction. According to the invention, through integration of the super capacitor and a network construction control strategy, dynamic reactive compensation and voltage support of a power grid system are realized, system inertia is enhanced, and stability of a power system is improved.

The invention belongs to the technical field of resonance stability of a power system, and discloses a high-voltage reactance configuration method for improving resonance stability of the power system, which solves the precision defect caused by neglecting voltage fluctuation in traditional modeling by establishing a fan and static var generator precise admittance model considering DC voltage fluctuation. The dq admittance model of the alternating current system is obtained according to the nodes, connected to the alternating current system, of the fan and the static var generator, general calculation of dq admittance of the multi-node alternating current system is achieved, the limitation that only single-node modeling is supported in a traditional method is broken through, the complex stability problem is quantized into an optimizable amplitude margin index, and the stability of the system is improved. A clear basis is provided for resonance stability analysis, high reactance configuration is expanded from traditional reactive compensation to resonance stability active optimization, and the resonance stability design efficiency of the new energy grid-connected system is remarkably improved.

The invention discloses a static var generator (SVG) additional dynamic damping-based broadband oscillation suppression method, which comprises the following steps of: acquiring three-phase voltage of an SVG machine end; according to the three-phase voltage, an oscillation frequency and an oscillation amplitude are obtained; performing band-pass filtering on the dq-axis voltage corresponding to the three-phase voltage according to the oscillation frequency; obtaining phase deviation introduced by band-pass filtering, and performing phase correction on the dq-axis voltage corresponding to the three-phase voltage; performing gain adjustment on the dq-axis voltage after phase correction to obtain a dq-axis current reference value under the oscillation frequency; and according to the dq-axis current reference value under the oscillation frequency, superposing the dq-axis current reference value with the dq-axis current reference value of the SVG to obtain a total reference value for controlling the dq-axis current. Positive damping in a wide frequency band of the power grid can be effectively enhanced, the impedance characteristic of the power grid is optimized, broadband oscillation of the system is suppressed, and the safety and stability of power grid operation are improved.

The invention discloses a network construction type SVG (static var generator) control method based on data-driven optimal self-synchronization. Obtaining the capacitor voltage of the direct current side of the SVG and the actual voltage and the actual current of the grid-connected point; constructing a DeePC controller input according to the actual voltage of the grid-connected point, the SVG direct current side capacitor voltage and a preset reference value, and obtaining a frequency deviation through the processing of the DeePC controller; adding the frequency deviation and a power grid rated frequency to obtain a controller frequency, and integrating to obtain a modulation wave phase signal; according to the SVG output voltage reference value, the actual voltage is sequentially processed by a voltage outer loop, current amplitude limiting and current inner loop to obtain a modulation wave voltage amplitude signal; and processing the modulated wave phase signal to obtain a modulated wave signal. According to the method, the control sequence is optimized online by directly utilizing the voltage data collected in real time, the mismatching risk of a traditional model is avoided, and a reactive power support solution with better dynamic response and autonomous toughness is provided for a new energy power grid.

The invention discloses a method and a system for optimizing a direct current converter station based on network construction type SVGs, and relates to the technical field of direct current transmission. N groups of network construction type SVGs are connected to the alternating current side of the direct current converter station; the network-forming SVG comprises a transformer, a starting resistor and a three-bridge-arm SVG valve which are connected in sequence; each bridge arm of the three-bridge-arm SVG valve comprises a plurality of full-bridge sub-modules; and according to a reactive compensation demand, a harmonic filtering demand and a charging limitation demand of a converter valve in the direct current converter station, calculating the group number of the network-forming SVG and parameters of an SVG valve, a transformer and a starting resistor in the network-forming SVG, and setting the network-forming SVG in the direct current converter station through the parameters. By adopting the embodiment of the invention, the network-forming SVG can be reasonably configured in the direct current converter station, reactive compensation and harmonic filtering functions of the converter station are realized, the SVG capability is fully exerted to provide rapid reactive support for an alternating current system to help fault recovery, the stability of a direct current power transmission system accessing an alternating current power grid is improved, and the support superiority of the system is exerted.

The invention discloses a static var generator grid-connected renewable energy power station coordination control system and method with an active power supporting capability, and relates to the technical field of power system control. The static var generator is used for providing reactive power support and dynamically adjusting active power based on four-quadrant operation characteristics when the power grid frequency fluctuates; and the combined frequency and voltage regulation and control unit is used for regulating and controlling the frequency and the voltage of the power grid and coordinating and controlling the operation states of the virtual synchronous generator and the static var generator based on a regulation and control result. According to the invention, cooperative control is carried out on the static var generator with the four-quadrant operation capability and the virtual synchronous generator with the network construction capability, and combined dynamic adjustment of active power and reactive power is realized under a unified control framework; the stable supporting capacity of the new energy power station under the power grid disturbance conditions of voltage sag, frequency fluctuation and the like is remarkably enhanced, and the autonomous response and adjustment capacity of the system is improved.

The utility model discloses a layout structure of a rack-mounted static var generator module, which belongs to the technical field of rack var generation, and comprises a base, the upper end of the base is fixedly connected with an upper cover plate through bolts, a PCBA (printed circuit board assembly) is mounted in the base, and the PCBA is fixedly connected with the upper cover plate through bolts. A plurality of radiators are installed in the base and are arranged at equal intervals, and a rear panel is fixedly connected to the position, located below the upper cover plate, in the base. The main points of the technical scheme are that a heating source of a power module part is arranged behind a fan, and an independent air channel is formed through a wind shield, so that the heat dissipation effect is enhanced; according to the utility model, the wind shield assembly is vertically installed, convenience is brought to production, after-sales maintenance is facilitated, the size is reduced, a layer of air duct with a space is formed, the product cost is greatly reduced, and market acceptance is more easily gained.

The invention relates to the technical field of power supply management, in particular to a power system network security situation monitoring system based on SVG (Static Var Generator) networking, comprising a data acquisition module used for acquiring power grid data and processing process data; the topology analysis module is used for acquiring an equipment node table and a connection relation table according to the power grid data and updating the equipment node table; the asset mapping module is used for acquiring a mapping result and calibrating updating of the equipment node table; the security analysis module is used for judging the security condition, deducing the dangerous attack according to the judgment result and correcting the calibration process of the updating of the equipment node table; and the analysis pushing module is used for sending the deduction result to a worker. The abnormal reason is found by acquiring the network security state of the physical equipment of the power grid, and the abnormal reason is pushed to the mobile terminal of the worker, so that the worker can adjust and repair the network security problem in time.

The invention discloses a power distribution network voltage control scheduling method and device based on a static var generator, electronic equipment and a storage medium, and belongs to the field of intelligent power grids, and the method comprises the steps: obtaining a topological structure of a power distribution network to be scheduled, hardware parameters of the static var generator, and a photovoltaic inverter group agent; according to the topological structure and the hardware parameters, with the purpose of minimizing the weighted sum of the comprehensive operation cost of the static var generator and the voltage deviation of the power distribution network, constructing a collaborative decision-making voltage model and constraint conditions of the collaborative decision-making voltage model; under the constraint condition, performing iteration solution of a preset round on the collaborative decision voltage model to generate a final scheduling strategy of the static var generator; and scheduling the static var generator in the to-be-scheduled power distribution network according to the final scheduling strategy. By implementing the method, the problem of inaccurate voltage control scheduling of the power distribution network due to the fact that the dynamic response behavior of the photovoltaic inverter group is not considered in the prior art can be solved.

The invention discloses a static var generator simulation method, a static var generator simulation device and a medium. The method comprises the following steps: constructing a constant voltage control model, a constant reactive power control model, a fault ride-through control model, an off-network protection model and a mode switching control model; constructing a static var generator simulation model based on the constant voltage control model, the constant reactive power control model, the fault ride-through control model, the off-network protection model and the mode switching control model; on the basis of the static var generator simulation model, reactive current is output to power grid equipment according to the specified voltage or reactive control target and the input control parameters, and the power grid equipment stably operates on the basis of the reactive current.

The invention discloses an intelligent control method, system and device for a static var generator module, and the method comprises the steps: writing system rated parameters, sliding mode control parameters, system equivalent parameters and weight matrix parameters, so as to complete the initialization and configuration of the parameters; when voltage sags, three-phase signals of a power grid are collected and processed, reactive power is calculated through coordinate transformation, a sliding mode surface is constructed, a gain coefficient is updated, and a control law is output for voltage sag response; when the modules run in parallel, establishing a state space model based on a measured value of a voltage and current sensor, setting a coupling weight coefficient, constructing an optimization objective function, and obtaining a control sequence through iterative calculation; and monitoring key parameters of the system, blocking fault module signals and redistributing power when the key parameters exceed a preset threshold value, and recovering system operation after recording fault information. Through the scheme of the invention, the stability of the system under large disturbance can be ensured, and the multi-module system can achieve power balanced distribution.

The invention discloses a VSC-HVDC grid-connected stability improvement method and system under a weak power grid based on SVG impedance remodeling, and the method can adjust the actual reference value of the dq-axis current of a current control inner ring through introducing a damping factor on the premise of not adding an oscillation detection module and a sensor, equivalently changes the output impedance of a static var generator, and improves the stability of the VSC-HVDC grid-connected stability. And therefore, the SVG low-frequency-band negative damping characteristic can be improved, and the grid-connected system damping can be According to the method, the grid-connected point voltage oscillation when the VSC-HVDC grid-connected system containing the SVG interacts with a weak power grid can be effectively suppressed, the stability of the grid-connected system is enhanced, and the stability margin of the system is improved.

The invention discloses a static var generator digital twinning system, method and equipment and a medium. The system comprises an actual static var generator device, a static var generator digital twinning device and a remote terminal, the static var generator digital twinning device is used for constructing a static var generator digital twinning model based on device parameters of the actual static var generator device and a preset binary file, the simulation module is also used for receiving measurement data transmitted by actual static var generator equipment, writing the measurement data into the static var generator digital twinborn model and generating an electromagnetic transient simulation initialization section, and is also used for simulating the static var generator digital twinborn model containing the electromagnetic transient simulation initialization section and generating a simulation result; and the simulation result is transmitted to the remote terminal. According to the invention, a refined analysis means is provided for the control strategy research of the static var generator and the power grid, and the operation safety and stability of the power grid are improved.

The invention discloses a current-limiting control method based on a network-forming static var generator. The current-limiting control method comprises the following steps: inputting an external direct-current voltage, stabilizing the voltage by a capacitor, and then outputting the voltage to an inverter bridge; the inverter bridge generates controllable alternating current through space vector modulation; the inductive filter filters high-frequency harmonic output end voltage; the terminal voltage amplitude and phase are monitored in real time, and current-limiting control is triggered based on the phase deviation between the voltage and the virtual internal potential when the voltage of the power grid drops; the terminal voltage interacts with ideal power grid voltage at a common coupling point through power grid impedance to generate PCC voltage; pCC voltage and output current are detected, and instantaneous power is calculated; the power signal is filtered and de-noised and then a modulation instruction is generated by the current-limiting controller and is fed back to the inverter bridge to form a closed loop. The reactive power supporting voltage is injected preferentially, the voltage drop amplitude is remarkably reduced, the inertia damping supporting capacity of the system is enhanced, power grid fault recovery is accelerated, and meanwhile the voltage instability problem caused by a traditional current limiting strategy is avoided.

The invention discloses a static var generator control method and a static var generator control system, which can quickly respond to the change of the voltage of a power grid, maintain the system voltage in a set range by dynamically adjusting the output of reactive power, are particularly important for long-distance power transmission lines and heavy-load areas, and can quickly provide or absorb the reactive power when the system is subjected to large disturbance. Voltage collapse is prevented, and stable operation of the system is ensured.

The invention discloses an off-line high-voltage SVG load testing method and system, and relates to the field of SVG testing, and the method comprises the steps: controlling a high-voltage static var generator to execute pre-charging operation based on the amplitude of the output voltage of a high-voltage direct-hanging energy storage converter, and starting the self-inspection work of the high-voltage static var generator after the pre-charging is completed; setting operation modes of the accompanying test high-voltage direct-hanging energy storage converter and the high-voltage static var generator, and based on the operation modes, sending power parameters by using the test controller to execute load test processing of the high-voltage static var generator; and creating and starting a test sequence by using the test controller, outputting the characteristic quantity of the high-voltage static var generator according to the operation process of the test sequence, executing off-line power grid fault adaptability performance test processing, and outputting a performance test result of the high-voltage static var generator. According to the high-voltage SVG on-load test and function test provided by the invention, a high-voltage power grid is not needed, the detection is convenient, and the influence of the test on the high-voltage power grid is also avoided.

The invention discloses a control method for supporting weak power grid operation by a network construction type SVG (static var generator), relates to the technical field of power electronics, and solves the problems that in the prior art, AC voltage cannot be actively constructed, an effective dynamic coordination mechanism is lacked with DC current control of a sending-end converter station, and the reliability of the system is poor. The system voltage supporting capability is insufficient and the direct current dynamic response performance is limited under the weak power grid working condition. According to the method, cooperative control of a network-forming SVG and an LCC-HVDC sending end converter station is adopted, specifically, the stability of power transmission of the LCC-HVDC system is ensured through a direct current control mode, the network-forming SVG generates a voltage vector reference through power synchronous control and adopts voltage and current double-closed-loop control, so that the network-forming SVG has the active voltage supporting capacity, and the stability of power transmission of the LCC-HVDC system is improved. Therefore, the dynamic response speed and the overall stability of the system under the weak power grid working condition are remarkably improved, and coordinated optimization of reactive compensation and direct-current power control is achieved.

The invention provides an active static var generator in an interleaved parallel form, and relates to the technical field of integrated circuits, and the active static var generator comprises a first three-level topology module which comprises a first three-level topology circuit and a second three-level topology circuit which are connected in parallel between a bus positive electrode and a bus negative electrode, the midpoint of a first switching tube bridge arm of the first three-level topological circuit is coupled with the second end of the first inductor, and the midpoint of a second switching tube bridge arm of the second three-level topological circuit is coupled with the second end of the second inductor. The midpoint of a first diode bridge arm of the first three-level topological circuit and the midpoint of a second diode bridge arm of the second three-level topological circuit are both coupled with the null line connecting end, and the first capacitor is coupled between the first live line connecting end and the second end coupled with the null line connecting end. The first end of the first inductor and the first end of the second inductor are both coupled with the first live wire connecting end, and the problem that the performance is poor in the scene of ultrahigh frequency response, extreme ripple suppression or multi-module flexible expansion is solved.

The present invention discloses a static VAR generator control method and system, which can quickly respond to changes in grid voltage and maintain the system voltage within a set range by dynamically adjusting reactive power output. This is especially important for long-distance transmission lines and heavily loaded areas. When the system is subject to large disturbances, reactive power can be quickly provided or absorbed to prevent voltage collapse and ensure stable operation of the system.

1. Name of the Design Product: Static Var Generator (Wall-mounted). 2. Use of the Design Product: The design product is used for installation beside a transformer to perform reactive power compensation on the power supply grid. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photo that Best Illustrates the Design Key Points: Perspective View 2.