Flexible excitation system dynamic simulation test cabinet

Abstract

The utility model discloses a flexible excitation system dynamic simulation test cabinet, which comprises a cabinet body, and a flexible excitation regulator, a power control device, a power unit, a primary auxiliary loop electrical component and a secondary auxiliary loop electrical component which are integrated in the cabinet body, and the power unit and the secondary auxiliary loop electrical component are arranged at the lower layer in the cabinet body and are respectively positioned at the rear part and the front part in the cabinet body. The test cabinet structure can overcome the problems that in the prior art, a flexible excitation dynamic simulation system is large in size and large in installation and construction workload, and a flexible excitation system is large in power and cannot meet the simulation requirement of the small current flow simulation of a laboratory, so that the size of the cabinet body is reduced, the structure of the cabinet body is optimized, and the simulation requirement of the small current flow simulation of the laboratory is met.

Description

Technical Field

[0001] The utility model relates to a flexible excitation system dynamic mold test cabinet, in particular to a flexible excitation system dynamic mold test cabinet in which a flexible excitation regulator, a power control device and a power unit are integrated into one cabinet. Background Art

[0002] The flexible excitation system is a new type of excitation system based on full-controlled device rectification. It utilizes the control flexibility of fully-controlled devices and their AC / DC bidirectional decoupling control performance to significantly improve the excitation capability and reactive voltage support performance of the generator set, thereby improving the static and transient stability levels of the generator set and the reactive voltage support capability of the system.

[0003] Building a dynamic model system of a flexible excitation system and conducting functional simulation verification are important test verification measures to fully verify the function, stability and safety of the control system and power unit of the flexible excitation system. Generally, the engineering equipment of the flexible excitation system is used for dynamic model testing. The main core equipment includes flexible excitation regulator, power control device and power unit, in addition to the necessary primary and secondary auxiliary circuit electrical components. The main problems faced by this scheme are: according to the engineering equipment, one excitation regulation cabinet, one power cabinet and one test load cabinet are required. The test system is large in size and inconvenient to transport and install; the separation design of the multi-screen cabinet requires cabinet connection and inter-cabinet cable connection in the laboratory when in use, and the installation and construction workload is large; the engineering equipment generally has a large power and cannot meet the laboratory's small current dynamic simulation requirements, which is not convenient for dynamic model testing. Utility Model Content

[0004] The purpose of the utility model is to provide a flexible excitation system magnetic dynamic mold test cabinet to overcome the problems in the above-mentioned prior art that the flexible excitation dynamic mold system is large in size, the installation and construction workload is large, and the flexible excitation system has a large power and cannot meet the laboratory small current dynamic mold simulation needs, so as to reduce the cabinet size, optimize the cabinet structure, and meet the laboratory small current dynamic mold simulation needs.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] A flexible excitation system dynamic mold test cabinet comprises a cabinet body and a flexible excitation regulator, a power control device, a power unit, and primary and secondary auxiliary circuit electrical components integrated in the cabinet body. The flexible excitation regulator and the power control device are arranged on the upper layer of the cabinet body, and the power unit and the primary and secondary auxiliary circuit electrical components are arranged on the lower layer of the cabinet body and are respectively located at the rear and front of the cabinet body.

[0007] The above-mentioned cabinet includes a cabinet frame and a cabinet front door, a cabinet rear door, a cabinet top panel and a cabinet side panel, wherein the cabinet front door and the cabinet rear door are respectively installed in the front and rear of the cabinet frame, the cabinet front door is designed as a single-door structure, and the cabinet rear door is designed as a double-door structure, and the cabinet top panel is arranged on the top of the cabinet frame, and the cabinet side panels are arranged on the left and right sides of the cabinet frame.

[0008] The above-mentioned primary and secondary auxiliary circuit electrical components include an upper primary and secondary circuit electrical components, a middle primary and secondary circuit electrical components, and a lower primary and secondary circuit electrical components in a three-layer structure.

[0009] Among the above-mentioned primary and secondary auxiliary circuit electrical components, the primary auxiliary circuit electrical components include circuit breaker contactor, resistive and inductive load, capacitor pool and AC side step-down transformer, and the secondary auxiliary circuit electrical components include miniature circuit breaker, voltage dividing resistor box, contactor and relay.

[0010] The above-mentioned power unit includes a front-stage PWM rectifier module and a rear-stage DC chopper module, which adopts a structure arranged in a line in the cabinet. The front-stage PWM rectifier module is located on the left side of the rear of the cabinet, and the rear-stage DC chopper module is located on the right side of the rear of the cabinet.

[0011] The power unit comprises a front-stage PWM rectifier module and a rear-stage DC chopper module, wherein the front-stage PWM rectifier module is on the AC side and the rear-stage DC chopper module is on the DC side; the front-stage PWM rectifier module and the rear-stage DC chopper module are connected via a capacitor pool, and the output side of the rear-stage DC chopper module is connected to a resistive-inductive load.

[0012] After adopting the above scheme, the beneficial effects of the utility model are:

[0013] (1) The flexible excitation system dynamic mold test cabinet is a complete panel cabinet that integrates the flexible excitation regulator, power control device, power unit, and primary and secondary auxiliary circuit electrical components. It optimizes the structure and reduces the volume of the system equipment. Compared with the traditional flexible excitation dynamic mold system, it is easier to transport and install.

[0014] (2) The dynamic mold test cabinet of the flexible excitation system does not need to be combined with other cabinets during use, nor does it require cable connection between cabinets, which greatly reduces the installation and construction workload.

[0015] (3) The flexible excitation dynamic mold test cabinet adopts a "front and rear maintenance" double-door structure, which is convenient for the maintenance and replacement of electrical components in the cabinet.

[0016] (4) The flexible excitation dynamic mold test cabinet arranges the control device and the electrical components of the primary and secondary circuits in layers and areas, which facilitates test wiring and reduces mutual interference between circuits, thereby improving the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the front and rear modules of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the upper structure and the distribution of electrical components of the primary and secondary auxiliary circuits in the utility model.

[0020] In the figure: 1-cabinet front door, 2-cabinet rear door, 3-cabinet top plate, 4-cabinet side plate, 5-flexible excitation regulator, 6-power control device, 7-capacitor pool, 8-resistive-inductive load, 9-front-stage PWM rectifier module, 10-rear-stage DC chopper module, 11-upper-layer primary and secondary circuit electrical components, 12-middle-layer primary and secondary circuit electrical components, 13-lower-layer primary and secondary circuit electrical components. DETAILED DESCRIPTION

[0021] The technical solution and beneficial effects of the present utility model will be described in detail below with reference to the accompanying drawings.

[0022] like Figures 1 to 3 As shown, the utility model provides a flexible excitation system dynamic mold test cabinet, including a cabinet body and four devices integrated in the cabinet body, including a flexible excitation regulator 5, a power control device 6, a power unit, and primary and secondary auxiliary circuit electrical components, which are introduced below respectively.

[0023] The cabinet includes a cabinet frame and a cabinet front door 1, a cabinet rear door 2, a cabinet top panel 3 and a cabinet side panel 4, wherein the cabinet front door 1 and the cabinet rear door 2 are respectively installed at the front and rear of the cabinet frame, adopting a "front and rear maintenance" structure, the cabinet front door 1 is designed as a single-door structure, the cabinet rear door 2 is designed as a double-door structure, the cabinet top panel 3 is arranged on the top of the cabinet frame, and the cabinet side panels 4 are arranged on the left and right sides of the cabinet frame.

[0024] Cooperate Figure 3 As shown, the four types of equipment in the cabinet are arranged in layers and areas, wherein the flexible excitation regulator 5 and the power control device 6 are arranged on the upper layer, the power unit is arranged on the lower layer near the cabinet rear door 2, and the primary and secondary auxiliary circuit electrical components are arranged on the lower layer near the cabinet front door 1. In this embodiment, a three-layer structure is designed, including upper-layer primary and secondary circuit electrical components 11, middle-layer primary and secondary circuit electrical components 12, and lower-layer primary and secondary circuit electrical components 13, wherein the primary circuit components include: air switch contactor, resistive-inductive load 8, capacitor pool 7 and AC side step-down transformer, etc.; the secondary circuit components include: miniature circuit breaker, voltage-dividing resistor box, contactor and relay, etc.

[0025] like Figure 1 and Figure 2 As shown, the power unit includes a front-stage PWM rectifier module 9 and a rear-stage DC chopper module 10, which are arranged in a line in the cabinet. The front-stage PWM rectifier module 9 is located on the left side near the cabinet rear door 2, and the rear-stage DC chopper module 10 is located on the right side near the cabinet rear door 2; wherein the front-stage PWM rectifier module 9 is on the AC side, with three modules placed; the rear-stage DC chopper module 10 is on the DC side, with two modules placed. The front-stage PWM rectifier module 9 is connected to the rear-stage DC chopper module 10 through the capacitor pool 7 of the primary and secondary auxiliary circuit electrical components, and the output side of the rear-stage DC chopper module 10 is connected to the resistive-inductive load 8 of the primary and secondary auxiliary circuit electrical components.

[0026] During operation, a resistive-inductive load 8 is used to simulate the generator rotor winding load, wherein the resistance value is selected according to the output voltage of the subsequent DC chopper module, and the resistance value is such that a small current of 10A or less is generated in the resistive-inductive load at the maximum output voltage, thereby realizing a small current test of the dynamic model test cabinet.

[0027] The above embodiments are only for illustrating the technical idea of ​​the present utility model, and cannot be used to limit the protection scope of the present utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A flexible excitation system dynamic mold test cabinet, characterized in that: It includes a cabinet and a flexible excitation regulator, a power control device, a power unit, and primary and secondary auxiliary circuit electrical components integrated in the cabinet. The flexible excitation regulator and the power control device are arranged on the upper layer of the cabinet, and the power unit and primary and secondary auxiliary circuit electrical components are arranged on the lower layer of the cabinet and are respectively located at the rear and front of the cabinet.

2. A flexible excitation system dynamic mold test cabinet as claimed in claim 1, characterized in that: The cabinet includes a cabinet frame and a cabinet front door, a cabinet rear door, a cabinet top plate and a cabinet side plate, wherein the cabinet front door and the cabinet rear door are respectively installed in the front and rear of the cabinet frame, the cabinet front door is designed as a single-door structure, and the cabinet rear door is designed as a double-door structure, and the cabinet top plate is arranged on the top of the cabinet frame, and the cabinet side plates are arranged on the left and right sides of the cabinet frame.

3. A flexible excitation system dynamic mold test cabinet as claimed in claim 1, characterized in that: The primary and secondary auxiliary circuit electrical components include an upper primary and secondary circuit electrical components, a middle primary and secondary circuit electrical components, and a lower primary and secondary circuit electrical components in a three-layer structure.

4. A flexible excitation system dynamic mold test cabinet as claimed in claim 1, characterized in that: Among the primary and secondary auxiliary circuit electrical components, the primary auxiliary circuit electrical components include circuit breaker contactors, resistive and inductive loads, capacitors and AC side step-down transformers, and the secondary auxiliary circuit electrical components include miniature circuit breakers, voltage-dividing resistor boxes, contactors and relays.

5. A flexible excitation system dynamic mold test cabinet as claimed in claim 1, characterized in that: The power unit includes a front-stage PWM rectifier module and a rear-stage DC chopper module, which are arranged in a line in the cabinet. The front-stage PWM rectifier module is located on the left side of the rear of the cabinet, and the rear-stage DC chopper module is located on the right side of the rear of the cabinet.

6. A flexible excitation system dynamic mold test cabinet as claimed in claim 1, characterized in that: The power unit includes a front-stage PWM rectifier module and a rear-stage DC chopper module, wherein the front-stage PWM rectifier module is on the AC side and the rear-stage DC chopper module is on the DC side; the front-stage PWM rectifier module and the rear-stage DC chopper module are connected via a capacitor pool, and the output side of the rear-stage DC chopper module is connected to a resistive-inductive load.

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