Voltage stabilization supporting structure for wind power access point

Abstract

The utility model provides a wind power access point voltage stabilization support structure, which relates to the technical field of voltage stabilization, and comprises a current transformer, an inverter, an intermediate transformer and an electric power system, the inverter is installed on a direct current voltage source, the intermediate transformer is connected between the electric power system and the inverter, and the inverter is installed on the intermediate transformer. The current is transmitted from the power system to the direct current voltage source, the inverter is grounded, the direct current voltage source is used as a capacitor structure, and the direct current voltage source adopts a ZH823 model; a wind power access point voltage stabilization supporting structure composed of the current and voltage device, the inverter, the intermediate transformer and the electric power system is provided with a signal receiving and detecting structure, a power grid where the electric power system is located is connected with an induction generator, the induction generator adopts a wind turbine generator, the wind turbine generator is connected into the power grid through rectification and voltage transformation, and the signal receiving and detecting structure is connected with the signal receiving and detecting structure. The inverter adopts a DC24V model, and the intermediate transformer adopts a power transformer.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage stabilization, and in particular to a voltage stabilization support structure for a wind power access point. Background Art

[0002] With the rapid development of human material civilization, people pay more and more attention to low-carbon economy and environmental protection, which promotes the rapid development of new energy. Common new energy sources include solar energy, wind energy, biomass energy and nuclear energy. Among them, wind energy, as a clean energy with a wide distribution range, large storage capacity and relatively simple development and utilization, has received extensive attention from various countries. Wind power generation technology has become more mature, and more attention has been paid to scale and centralization, which is conducive to the expansion, reconstruction and management of wind farms. my country has a vast territory and a wide distribution of wind resources.

[0003] In the specification of a voltage stabilizer circuit in the prior art (Announcement No. CN103235631A), it is mentioned that "a first clamping circuit, a second clamping circuit, and a first NMOS tube, the first clamping circuit includes a second NMOS tube and a resistor R2, the drain end of the second NMOS tube is respectively connected to the gate end of the first NMOS tube and one end of the resistor R2, the gate end is respectively connected to the other end of the resistor R2 and one end of the resistor R1, the other end of the resistor R1 is respectively connected to the power supply VDD and the drain end of the first NMOS tube, the source end of the first NMOS tube is connected to the voltage output end, and the second clamping circuit includes an NMOS tube whose gate end is connected to the drain end", but the voltage stabilization circuit structure in the prior art is too complicated and cumbersome, the long-distance power supply load is large, and the loss will also increase accordingly, resulting in certain safety hazards in voltage operation. Utility Model Content

[0004] In order to overcome the defects of the prior art, a voltage stabilization support structure for a wind power access point is provided to solve the problem that the voltage stabilization circuit structure in the prior art is too complicated and cumbersome, the long-distance power supply load is large, and the loss will increase accordingly, resulting in certain safety hazards in voltage operation.

[0005] To achieve the above-mentioned purpose, a voltage stabilization support structure for a wind power access point is provided, comprising a current transformer, an inverter, an intermediate transformer and a power system, wherein the inverter is installed on a DC voltage source, and the intermediate transformer is connected between the power system and the inverter, and the current transmission direction is set to flow from the power system to the DC voltage source, and the inverter is grounded.

[0006] Furthermore, the DC voltage source is a capacitor structure, and the DC voltage source is of model ZH823.

[0007] Furthermore, the voltage stabilization support structure of the wind power access point composed of the current transformer, inverter, intermediate transformer and power system is equipped with a signal receiving and detecting structure.

[0008] Furthermore, the inverter adopts a DC24V model.

[0009] Furthermore, the intermediate transformer is a power transformer.

[0010] Furthermore, the power grid where the power system is located is connected to an induction generator, and the induction generator is a wind turbine set, which is connected to the power grid through rectification and transformation.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model mainly uses the inductive current lagging voltage as the inductive current, and only needs to generate reactive power. If the current leads the voltage as the capacitive current, only needs to absorb reactive power. It can cooperate with the reactive power optimization strategy of the power system, change the phase angle of current and voltage to realize the function of real-time reactive power compensation.

[0013] 2. The utility model determines the size of reactive power that needs to be compensated by detecting the signal from the power grid, and directly sends out reactive power of corresponding size. The size of reactive power is mainly determined by the number of thyristors that are opened and closed. The compensation speed is fast and the structure is simple.

[0014] 3. The utility model uses the wind to drive the blades of the fan to rotate, the rotation of the blades drives the gear box to work, the gear box drives the rotor of the generator to rotate, the induction generator generates electrical energy, which is connected to the power grid through reactive power compensation, and the electrical energy will be processed by rectification and transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a voltage stabilization support structure for a wind power access point according to an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of wind power access to the power grid according to an embodiment of the utility model. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model is further described in detail in combination with the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model. Specific details such as specific system structures and technologies are proposed in order to more thoroughly understand the embodiments of the utility model. The described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. However, it should be clear to those skilled in the art that the utility model can also be implemented in other embodiments without these specific details. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present disclosure.

[0018] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings.

[0019] Figure 1 The schematic diagram of the voltage stabilization support structure of the wind power access point according to the utility model embodiment and Figure 2 This is a schematic diagram of wind power access to the power grid according to an embodiment of the utility model.

[0020] Reference Figure 1 As shown, the utility model provides a voltage stabilization support structure for a wind power access point, including a current transformer, an inverter, an intermediate transformer and a power system, the inverter is installed on a DC voltage source, and the intermediate transformer is connected between the power system and the inverter, and the current transmission direction is set to flow from the power system to the DC voltage source, and the inverter is grounded.

[0021] In this embodiment, the DC voltage source is a capacitor structure, and the DC voltage source adopts a ZH823 model, the inverter adopts a DC24V model, and the intermediate transformer adopts a power transformer.

[0022] As a preferred implementation mode, the utility model mainly works when the current lags the voltage and is inductive, and only reactive power needs to be emitted. If the current leads the voltage and is capacitive, only reactive power needs to be absorbed. It can cooperate with the reactive power optimization strategy of the power system and change the phase angle of current and voltage to realize the function of real-time reactive power compensation.

[0023] In this embodiment, the voltage stabilization support structure of the wind power access point composed of the current transformer, inverter, intermediate transformer and power system in the utility model is equipped with a signal receiving and detecting structure.

[0024] As a preferred implementation mode, the utility model determines the size of reactive power that needs to be compensated by detecting a signal from the power grid, and directly emits reactive power of corresponding size. The size of reactive power is mainly determined by the number of thyristors that are opened and closed, and the compensation speed is fast and the structure is simple.

[0025] In this embodiment, the power grid where the power system is located is connected to an induction generator, and the induction generator is a wind turbine set, which is connected to the power grid through rectification and transformation.

[0026] As a preferred implementation mode, the utility model uses the wind to drive the blades of the fan to rotate, the rotation of the blades drives the gear box to work, the gear box drives the rotor of the generator to rotate, the induction generator generates electrical energy, and is connected to the power grid through reactive power compensation, wherein the electrical energy is processed by rectification and transformation.

[0027] The utility model can effectively solve the problems in the prior art that the voltage stabilization circuit structure is too complicated and cumbersome, the long-distance power supply load is large, the loss will also increase accordingly, and there are certain safety hazards in voltage operation. The utility model adjusts by emitting inductive reactive power and capacitive reactive power. The principle is similar to the power factor. When the voltage is high, the inductive reactive power is supplemented, and when the voltage is low, the capacitive reactive power is supplemented, which is equivalent to absorbing the inductive reactive power.

[0028] The above embodiments are used to explain the present invention rather than to limit the present invention. Any modifications and changes made to the present invention within the spirit of the present invention and the scope of the claims for protection shall be included in the protection scope of the present invention.

Claims

1. A voltage stabilization support structure for a wind power access point, characterized in that: It includes a current transformer, an inverter, an intermediate transformer and a power system. The inverter is installed on a DC voltage source, and the intermediate transformer is connected between the power system and the inverter. The current transmission direction is set to flow from the power system to the DC voltage source, and the inverter is grounded.

2. A voltage stabilization support structure for a wind power access point according to claim 1, characterized in that: The DC voltage source is a capacitor structure, and the DC voltage source adopts the ZH823 model.

3. A voltage stabilization support structure for a wind power access point according to claim 1, characterized in that: The voltage stabilization support structure of the wind power access point composed of the current transformer, inverter, intermediate transformer and power system is equipped with a signal receiving and detecting structure.

4. A voltage stabilization support structure for a wind power access point according to claim 1, characterized in that: The inverter is a DC24V model.

5. A voltage stabilization support structure for a wind power access point according to claim 1, characterized in that: The intermediate transformer is a power transformer.

6. A voltage stabilization support structure for a wind power access point according to claim 1, characterized in that: The power grid where the power system is located is connected to an induction generator, and the induction generator adopts a wind turbine set, which is connected to the power grid through rectification and transformation.

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