CN218888146U

CN218888146U - Novel active dynamic voltage compensation adjusting device with energy storage function

Info

Publication number: CN218888146U
Application number: CN202223237846.6U
Authority: CN
Inventors: 吴顺利
Original assignee: Dajiao New Energy Technology Shanghai Co ltd
Current assignee: Dajiao New Energy Technology Shanghai Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-04-18
Anticipated expiration: 2032-12-01

Abstract

The utility model discloses a novel active dynamic voltage compensation adjusting device with energy storage function, which comprises a switch unit used for the safe link and the switch control of the whole set of equipment; the energy storage unit is used as a large-capacity energy storage unit cabinet; the regulating unit is used as a power core of the whole set of system, the switching unit comprises a thyristor, and when the voltage of the power grid is stable, the power grid supplies power to a load through the thyristor and simultaneously charges the energy storage unit; when the power grid voltage is dynamically disturbed, the thyristor is turned off, and the energy storage unit supplies power to the load; under the power quality mode, the power grid and the energy storage unit simultaneously supply power to the load through the adjusting unit.

Description

Novel active dynamic voltage compensation adjusting device with energy storage function

Technical Field

The utility model relates to an electric power field, concretely relates to novel active dynamic voltage compensation adjusting device with energy storage function.

Background

More than 90% of the power quality problems in modern precision manufacturing industry are caused by transient (transient) voltage disturbance, which means that the sine waveform of the power supply voltage is distorted due to transient (transient) voltage disturbance, and various problems of power quality pollution are caused.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model provides a novel active dynamic voltage compensation adjusting device with energy storage function, including electric wire netting, load, switch and connecting wire, still include switch element, energy storage unit and regulating unit, switch element A input is connected and is connected the electric wire netting, and the output is connected the load, control electric wire netting to load circuit's break-make, regulating unit C input connecting switch element output, regulating unit C output connects the load, energy storage unit B connects regulating unit C.

Preferably: the switch unit comprises a thyristor, a maintenance switch and a bypass switch, one end of the bypass switch is connected with a power grid, and the other end of the bypass switch is connected with a load.

Preferably: the maintenance switch comprises a first maintenance switch and a second maintenance switch, one end of the first maintenance switch is connected with a power grid, the other end of the first maintenance switch is connected with the input end of the thyristor, one end of the second maintenance switch is connected with the output end of the thyristor, and the other end of the second maintenance switch is connected with the load.

Preferably: the output end of the energy storage unit is connected with the input end of the adjusting unit, and the input end of the energy storage unit is connected with the output end of the adjusting unit.

Preferably, the following components: the adjusting unit comprises an inverter, and the input end of the inverter is used as the input end of the adjusting unit, is connected with the output end of the energy storage unit and is used for converting the direct current of the energy storage unit into alternating current.

Preferably: the regulating unit further comprises a load switch, one end of the load switch is connected with the inverter, and the other end of the load switch is connected with the second maintenance switch and used for controlling the connection and disconnection between the energy storage unit and the load circuit.

The utility model discloses a technological effect and advantage:

in case of sudden transient voltage disturbance, a stable compensation quantity can be provided to the power supply line, so that the voltage of the load can be kept stable.

Drawings

Fig. 1 is a schematic structural diagram of a novel active dynamic voltage compensation adjustment device with an energy storage function according to an embodiment of the present application when a grid voltage is stable;

fig. 2 is a schematic structural diagram of a novel active dynamic voltage compensation adjustment device with an energy storage function according to an embodiment of the present disclosure when a grid voltage is dynamically disturbed;

fig. 3 is a schematic structural diagram of a novel active dynamic voltage compensation adjustment device with an energy storage function in a power quality mode according to an embodiment of the present application.

In the figure:

A. a switch unit; B. an energy storage unit; C. an adjustment unit; 1. a thyristor; 2. an energy storage unit; 3. an inverter; 4. a bypass switch; 501. a first maintenance switch; 502. a second maintenance switch; 6. and (4) a load switch.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

As shown in FIGS. 1-3, the utility model relates to a novel active dynamic voltage compensation adjusting device with energy storage function includes switch element A, energy storage unit B and regulating unit C, and the electric wire netting is connected to switch element A input, and the load is connected to the output, and the break-make of control electric wire netting to load circuit, regulating unit C input connection switch element output, and the load is connected to regulating unit C output, and regulating unit C is connected to energy storage unit B.

The switch unit A is a safe link and switch control of the whole set of equipment, and comprises a thyristor 1, a maintenance switch and a bypass switch 4, wherein one end of the bypass switch 4 is connected with a power grid, the other end of the bypass switch is connected with a load and is used for providing voltage and current for the load under the condition of normal power supply, the maintenance switch comprises a first maintenance switch 501 and a second maintenance switch 502, one end of the first maintenance switch 501 is connected with the power grid, the other end of the first maintenance switch 501 is connected with the input end of the thyristor 1, one end of the second maintenance switch 502 is connected with the output end of the thyristor 1, the other end of the second maintenance switch is connected with the load and is used for facilitating maintenance after the whole set of equipment has problems, the thyristor 1 is connected with the first maintenance switch 501 and the second maintenance switch 502 in series and is connected with the bypass switch 4 in parallel and is used as a change-over switch of a main control loop, and in the embodiment, a detection module can be further arranged between the second maintenance switch 502 and the load and used for detecting the switch signal quantity; the display module is connected between the monitoring module and the load and is used for displaying voltage and current; the alarm module is connected between the power grid and the first maintenance switch 501 and is used for alarming when the voltage of the power grid is unstable.

Energy storage unit B is the energy storage cabinet of large capacity, including the group battery and the battery management device that can charge repeatedly, and the regulating unit C input is connected to energy storage unit B's output, and the regulating unit C output is connected to energy storage unit B's input for the energy storage of electric energy floats when grid voltage is stable, gives the load power supply when grid voltage developments are disturbed.

The adjusting unit C is a power core of the whole set of system, and includes a high-power inverter 3 and a load switch 6, an input end of the inverter 3 is used as an input end of the adjusting unit C, and is connected to an output end of the energy storage unit B, an output end of the inverter 3 is connected to the load switch 6, and is used for converting direct current of the energy storage unit 2 into alternating current for transmission to a load, and the load switch 6 is connected to the second maintenance switch 502, and is used for controlling disconnection and connection between the energy storage unit 2 and a load circuit.

Under the voltage stable state of the power grid, as shown in fig. 1, the power grid supplies power to the load through the thyristor 1, meanwhile, the energy storage unit 2 is subjected to floating charging, through the floating charging technology, the charging current is stable, the charging current is small, the loss is small, the whole energy storage cabinet can be subjected to hot backup under the conditions of stability, reliability and low power consumption by matching with a battery management device, the whole working condition is similar to that of a commercial energy storage converter PCS, the peak load elimination and valley filling of power utilization can be realized, and the effect of the side load of the power utilization is stabilized.

Under the condition that the voltage is dynamically disturbed, as shown in fig. 2, the thyristor 1 is quickly turned off, the energy storage unit 2 supplies power to the load through the power unit, the voltage of the load is stabilized, and the system can seamlessly control the voltage stabilization and power control of the load regardless of transient voltage sag or voltage flicker, voltage rise or even voltage interruption, thereby playing the function of a backup EPS power supply and simultaneously having the uninterrupted function of the UPS.

In the power quality mode, as shown in fig. 3, the power grid and the regulating unit C supply power to the load at the same time, and when the power grid has slight voltage dip and drop or flicker, and is interrupted for a short time, the function of DVR dynamic voltage regulation in the conventional functional sense is realized, so that the load voltage is still stable, and the power is still stable.

The utility model discloses an in each embodiment, adopt independent function cabinet to assemble into one set of whole system, the function is independent, be fit for tailorring formula collocation and use, also be fit for dividing functional module to make up and debug, whole this set of system falls into 4 main functional modules and integrative, PCS two-way energy storage structure when grid voltage is stable respectively, backup power source EPS and online uninterrupted power source UPS function after the voltage interruption, dynamic voltage regulation function when there is the electric energy quality problem in voltage sag and voltage flicker.

It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present disclosure. Structures, devices and methods of operation not specifically described or illustrated in the present application are not specifically illustrated or described, but are generally practiced in the art without limitation.

Claims

1. The utility model provides a novel active dynamic voltage compensation adjusting device with energy storage function, includes electric wire netting, load, switch and connecting wire, its characterized in that still includes switch element, energy storage unit and regulating unit, switch element A input is connected and is connected the electric wire netting, and the load is connected to the output, control electric wire netting to load circuit's break-make, regulating unit C input connection switch element output, regulating unit C output connection load, regulating unit B connects regulating unit C.

2. The active dynamic voltage compensation regulator with energy storage function as claimed in claim 1, wherein the switch unit includes a thyristor, a maintenance switch and a bypass switch, one end of the bypass switch is connected to the grid, and the other end of the bypass switch is connected to the load.

3. The active dynamic voltage compensation regulator with energy storage function as claimed in claim 2, wherein the maintenance switch comprises a first maintenance switch and a second maintenance switch, one end of the first maintenance switch is connected to the power grid, the other end of the first maintenance switch is connected to the thyristor, one end of the second maintenance switch is connected to the thyristor, and the other end of the second maintenance switch is connected to the load.

4. The novel active dynamic voltage compensation adjustment device with energy storage function as claimed in claim 3, wherein the thyristor is connected in series with the first maintenance switch and the second maintenance switch, and is connected in parallel with the bypass switch as a switch of the main control loop.

5. The novel active dynamic voltage compensation adjusting device with the energy storage function as claimed in claim 1, wherein an output end of the energy storage unit is connected to an input end of the adjusting unit, and an input end of the energy storage unit is connected to an output end of the adjusting unit.

6. The novel active dynamic voltage compensation adjustment device with energy storage function according to claim 4, wherein the adjustment unit comprises an inverter, and the input end of the inverter is used as the input end of the adjustment unit and is connected to the output end of the energy storage unit, so as to change the direct current of the energy storage unit into alternating current.

7. The novel active dynamic voltage compensation adjustment device with the energy storage function as claimed in claim 6, wherein the adjustment unit further comprises a load switch, one end of the load switch is connected to the inverter, and the other end of the load switch is connected to the second maintenance switch for controlling the connection and disconnection between the energy storage unit and the load circuit.