Phase modifier unit control system

Abstract

The utility model relates to the technical field of phase modulation, in particular to a phase modifier unit control system. The embodiment of the utility model provides a phase modifier group control system. The phase modifier group control system comprises a controller, a plurality of phase modifiers and a temperature acquisition device, each phase modifier is connected with a power grid and the controller, a temperature acquisition device is arranged in each phase modifier, and the temperature acquisition device is used for acquiring the temperature in the phase modifier; the controller comprises an acquisition unit and a control unit, the acquisition unit is used for receiving the voltage of the power grid and the temperature acquired by the temperature acquisition device, and the control unit is used for controlling the terminal voltage of the phase modifier according to the voltage fluctuation frequency of the power grid so as to control the reactive power regulation quantity output by the phase modifier. The embodiment of the utility model provides a phase modifier group control system, which can provide a phase modifier group with large reactive power regulation.

Description

Technical Field

[0001] The utility model relates to the technical field of phase modulation, and particularly relates to a synchronous condenser unit control system. Background Art

[0002] A synchronous condenser is a device for compensating reactive power in the power grid.

[0003] In the related art, with the access of new energy to the power grid, the power grid fluctuates greatly, and a single synchronous condenser is difficult to meet the reactive power regulation requirements.

[0004] Therefore, in view of the above deficiencies, there is an urgent need for a synchronous condenser unit control system. Summary of the Utility Model

[0005] An embodiment of the utility model provides a synchronous condenser unit control system, which can provide a synchronous condenser unit for large reactive power regulation.

[0006] An embodiment of the utility model provides a synchronous condenser unit control system, including a controller, a plurality of synchronous condensers and a temperature acquisition device;

[0007] Each of the synchronous condensers is respectively connected to the power grid and the controller, and a temperature acquisition device is arranged in each of the synchronous condensers, and the temperature acquisition device is used for acquiring the temperature inside the synchronous condenser;

[0008] The controller includes an acquisition unit and a control unit. The acquisition unit is used for receiving the voltage of the power grid and the temperature acquired by the temperature acquisition device, and the control unit is used for controlling the terminal voltage of the synchronous condenser according to the voltage fluctuation frequency of the power grid so as to control the reactive power regulation amount output by the synchronous condenser;

[0009] When the temperature of one or more of the synchronous condensers exceeds a preset temperature, the controller reduces the terminal voltage of these synchronous condensers and increases the terminal voltage of the synchronous condensers that do not exceed the preset temperature, so that the total reactive power of all the synchronous condensers is equal to the required reactive power regulation amount.

[0010] In a possible design, there are two synchronous condensers in the synchronous condenser unit.

[0011] In a possible design, the controller is a PLC controller or a DCS controller.

[0012] In a possible design, the temperature acquisition device is a gel type temperature sensor or a resistance type temperature sensor.

[0013] In a possible design, the synchronous condenser includes a constant voltage power supply, an excitation regulator, a rotor winding, a stator and a voltage transformer;

[0014] The constant-voltage power supply is connected to the input end of the excitation regulator, the output end of the excitation regulator is connected to the rotor winding, the stator is connected to the voltage transformer, and the voltage transformer is connected to the input end of the excitation regulator.

[0015] The utility model has at least the following beneficial effects compared with the prior art:

[0016] In this embodiment, the temperature acquisition device acquires the temperatures in different synchronous condensers in real time. If the temperatures of all the synchronous condensers do not exceed the preset temperature, each synchronous condenser is in the automatic regulation mode. If the temperature of one or more of the multiple synchronous condensers exceeds the preset temperature, at this time, the automatic regulation mode of each synchronous condenser is stopped, and the controller reduces the terminal voltage of these synchronous condensers with too high temperatures to make their temperatures drop naturally. Meanwhile, in order to meet the reactive power compensation requirement of the power grid, the terminal voltage of the synchronous condensers with lower temperatures is increased to make the total reactive power compensation equal to the reactive power requirement. The multiple synchronous condensers work together, which can not only provide a large reactive power regulation amount, but also maintain a normal working temperature, so as to increase the working life of the synchronous condensers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for describing the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a structural diagram of a synchronous condenser group control system provided by an embodiment of the present utility model.

[0019] In the figure:

[0020] 1 - Controller;

[0021] 2 - Synchronous condenser;

[0022] 3 - Temperature acquisition device;

[0023] 4 - Power grid. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the embodiments of the present utility model, unless otherwise clearly specified and defined, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; unless otherwise specified or stated, the term "plurality" means two or more; the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] In the description of this specification, it should be understood that the orientation terms such as "upper" and "lower" described in the embodiments of the present utility model are described from the angles shown in the drawings and should not be construed as limiting the embodiments of the present utility model. In addition, in the context, it should also be understood that when it is mentioned that an element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element.

[0027] As Figure 1 shown, the embodiments of the present utility model provide a synchronous condenser unit control system, including a controller 1, a plurality of synchronous condensers 2, and a temperature acquisition device 3;

[0028] Each synchronous condenser 2 is respectively connected to the power grid 4 and the controller 1. A temperature acquisition device 3 is arranged in each synchronous condenser 2, and the temperature acquisition device 3 is used to acquire the temperature inside the synchronous condenser 2;

[0029] The controller 1 includes an acquisition unit and a control unit. The acquisition unit is used to receive the voltage of the power grid 4 and the temperature acquired by the temperature acquisition device 3, and the control unit is used to control the terminal voltage of the synchronous condenser 2 according to the voltage fluctuation frequency of the power grid 4 so as to control the reactive power regulation amount output by it;

[0030] When the temperature of one or more synchronous condensers 2 exceeds the preset temperature, the controller 1 reduces the terminal voltage of these synchronous condensers 2 and increases the terminal voltage of the synchronous condensers 2 that do not exceed the preset temperature, so that the total reactive power of all synchronous condensers 2 is equal to the required reactive power regulation amount.

[0031] In this embodiment, the temperature acquisition device 3 acquires the temperatures inside different synchronous condensers 2 in real time. If the temperatures of all the synchronous condensers 2 do not exceed the preset temperature, each synchronous condenser 2 is in the automatic adjustment mode. If the temperature of one or more of the multiple synchronous condensers 2 exceeds the preset temperature, at this time, the automatic adjustment mode of each synchronous condenser 2 is stopped, and the controller 1 reduces the terminal voltage of these synchronous condensers 2 with too high temperatures, so that their temperatures drop naturally. At the same time, in order to meet the reactive power compensation requirements of the power grid 4, the terminal voltage of the synchronous condensers 2 with lower temperatures is increased, so that the total reactive power compensation is equal to the reactive power demand. The multiple synchronous condensers 2 work together, which can not only provide a large reactive power adjustment amount, but also maintain a normal working temperature, increasing the service life of the synchronous condenser 2.

[0032] It should be noted that the temperature acquisition device 3 can be connected to the controller 1 in a wired manner or a wireless manner.

[0033] In some embodiments of the present utility model, there are two synchronous condensers 2 in the synchronous condenser 2 group. Two synchronous condensers 2 can meet the needs of most power grids 4. Of course, more synchronous condensers can also be set to meet more diverse needs.

[0034] In some embodiments of the present utility model, the controller 1 is a PLC controller 1 or a DCS controller 1. In this embodiment, the PLC controller 1 and the DCS controller 1 are relatively mature controllers 1, which are convenient for split control.

[0035] In some embodiments of the present utility model, the temperature acquisition device 3 is a gel-type temperature sensor or a resistance-type temperature sensor. In this embodiment, the gel-type temperature sensor has the advantage of high temperature sensing sensitivity.

[0036] In some embodiments of the present utility model, the synchronous condenser 2 includes a constant voltage power supply, an excitation regulator, a rotor winding, a stator, and a voltage transformer;

[0037] The constant voltage power supply is connected to the input end of the excitation regulator, the output end of the excitation regulator is connected to the rotor winding, the stator is connected to the voltage transformer, and the voltage transformer is connected to the input end of the excitation regulator.

[0038] In this embodiment, the constant voltage power supply provides a fixed voltage for the excitation regulator, and the voltage transformer inputs the changing voltage into the excitation regulator. The excitation regulator outputs an electrical signal according to the voltage of the voltage transformer to control the current of the rotor.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A phase condenser unit control system, characterized in that: It comprises a controller (1), a plurality of phase regulators (2) and a temperature collection device (3); Each of the phase regulators (2) is connected to a power grid (4) and the controller (1) respectively, and each of the phase regulators (2) is provided with a temperature collection device (3), and the temperature collection device (3) is used to collect the temperature inside the phase regulator (2); The controller (1) comprises a collection unit and a control unit, the collection unit being used to receive the voltage of the power grid (4) and the temperature collected by the temperature collection device (3), and the control unit being used to control the terminal voltage of the phase modulator (2) according to the voltage fluctuation frequency of the power grid (4) so ​​as to control the reactive power adjustment amount output by the phase modulator (2); When the temperature of one or more of the phase regulators (2) exceeds a preset temperature, the controller (1) reduces the terminal voltage of these phase regulators (2) and increases the terminal voltage of the phase regulators (2) whose temperature does not exceed the preset temperature, so that the total reactive power of all the phase regulators (2) is equal to the required reactive power adjustment amount.

2. A phase condenser unit control system according to claim 1, characterized in that: There are two phase regulators (2) in the phase regulator (2) group.

3. A phase condenser unit control system according to claim 1, characterized in that: The controller (1) is a PLC controller (1) or a DCS controller (1).

4. A phase condenser unit control system according to claim 1, characterized in that: The temperature collection device (3) is a gel-type temperature sensor or a resistance-type temperature sensor.

5. A phase condenser unit control system according to claim 1, characterized in that: The phase regulator (2) comprises a constant voltage power supply, an excitation regulator, a rotor winding, a stator and a voltage transformer; The constant voltage power supply is connected to the input end of the excitation regulator, the output end of the excitation regulator is connected to the rotor winding, the stator is connected to the voltage transformer, and the voltage transformer is connected to the input end of the excitation regulator.

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