CN204304401U - A kind of transformer fault that advances is protected and diagnostic device - Google Patents

Abstract

The utility model relates to a device for fault protection and diagnosis of a propulsion transformer, which comprises a distributed control module (DCU), isomorphic and distributed processing of software and hardware. The scheme detects and collects the line voltage, line current and winding temperature of each winding of the propulsion transformer and converts them into digital quantities, and can realize the parameter detection, fault protection and fault diagnosis of the propulsion transformer through a fully digital software algorithm. This solution can be widely applied to various parameter detection, fault protection and fault diagnosis devices, and can simultaneously perform full-digital parameter detection, fault protection and fault diagnosis, which reduces the difficulty and cost of device development and improves system security. Versatility, maintainability, compactness and scalability.

Description

A Propulsion Transformer Fault Protection and Diagnosis Device

technical field

The utility model belongs to the field of transformers and fault diagnosis, in particular to a fault protection and diagnosis device for a propulsion transformer.

Background technique

At present, transformer fault protection and diagnosis devices mainly adopt a lumped processing method, using a single computer or a single computing unit as the core, with heavy calculation tasks and poor real-time performance. When a single computer or a single computing unit fails, it is difficult for the device to quickly troubleshoot and repair, and cannot reliably guarantee the safety of the protected transformer. Moreover, transformer fault protection and diagnosis devices that adopt a lumped processing method generally have solidified the maximum hardware resources and computing capabilities that can be possessed during the development stage, and cannot be expanded and upgraded conveniently and effectively.

Utility model content

The purpose of this utility model is to overcome the shortcomings of the prior art, and propose a realization scheme and device for promoting transformer fault protection and diagnosis devices, which can be widely used in various parameter detection, fault protection and fault diagnosis devices, and can simultaneously perform All-digital parameter detection, fault protection and fault diagnosis reduce the development difficulty and cost of the device, and improve the safety, versatility, maintainability, compactness and scalability of the system.

The technical scheme of the utility model is:

A device for fault protection and diagnosis of a propulsion transformer, characterized in that: a power supply module, at least five distributed control modules, an indicator light, a buzzer, a switch, an OP panel, and a sensor interface; the five distributed control modules are respectively The first distributed control module, the second distributed control module, the third distributed control module, the fourth distributed control module and the fifth distributed control module; the five-way DCU modules have the same hardware structure. The first distributed control module, the fifth distributed control module The second distributed control module, the third distributed control module, and the fifth distributed control module are simultaneously connected to the fourth distributed control module using the CAN bus; the fourth distributed control module is connected to the indicator light, buzzer, switch, OP panel; the sensor interface includes a voltage sensor interface, a current sensor interface, and a temperature sensor interface; the first distributed control module is provided with a voltage sensor interface, a current sensor interface, and a temperature sensor interface; the fifth distributed control module is provided with ;

In the above-mentioned a propulsion transformer fault protection and diagnosis device,

The first distributed control module processes the primary winding, and inputs are three current signals, three voltage signals and three temperature signals of the primary winding.

The second distributed control module processes the secondary winding of the triangle, and inputs are three current signals, three voltage signals and three temperature signals of the secondary triangle.

The third distributed control module processes the star-shaped secondary winding, and inputs are three-way current signals, three-way voltage signals and three-way temperature signals of the star-shaped secondary side.

The fourth distributed control module is the main controller, which summarizes the winding states from the first distributed control module, the second distributed control module, and the third distributed control module, judges the overall state of the transformer, and controls the subsequent Electrical protection, indicator light and buzzer, and send the overall status code of the transformer to the OP panel.

In order to supplement the lack of automatic control, the fourth distributed control module also adds manual control (forced break switch and manual close switch) to facilitate manual intervention.

The fifth distributed control module handles the current longitudinal difference protection of the primary and secondary windings, and the input is 9 current signals of the primary and secondary windings.

In the above-mentioned propulsion transformer fault protection and diagnosis device, the power supply module inputs AC220V and outputs DC24V/20A to provide unified power supply to the device. All bottom management modules, indicator lights, buzzers and OP panels in the device are powered by DC24V.

In the above-mentioned propulsion transformer fault protection and diagnosis device, the distributed control module uses a high-performance digital signal processing chip TMS320F2812 as the core, and has 10 AD ports for synchronous acquisition of analog signals, 8 switch input ports, and 4 switch The output port and 4 bidirectional IO ports are used for digital control, and 1 RS232 port, 1 RS485 port and 1 CAN port are provided for network communication. There is 1 address selection switch in the module to set the address.

In the aforesaid propulsion transformer fault protection and diagnosis device, there are 4 indicator lights. The power indicator light indicates whether the output of the power module is normal, and it is directly connected to the power supply. The device running indicator light indicates whether the 4-way DCU is normal and is controlled by DCU4. The fault alarm indicator light indicates whether the transformer is faulty or not, and is controlled by DCU4. The relay protection indicator light indicates whether the device has relay protection action, which is controlled by DCU4.

In the above-mentioned device for fault protection and diagnosis of a propulsion transformer, there is one buzzer. When the device fails or the transformer fails, the buzzer will act.

In the aforesaid propulsion transformer fault protection and diagnosis device, there are 4 switches in the device. The power switch controls the AC220V input. The manual break switch and the manual close switch force the device to issue a break command or a close command. The buzzer disable switch controls whether the device uses the buzzer.

In the above-mentioned propulsion transformer fault protection and diagnosis device, the device has 1 OP panel, which receives the data packet sent by DCU4, and displays the working information of the transformer to be tested, the fault point information of the transformer to be tested and the action of the controlled circuit breaker state.

Each distributed control module of the utility model is an independent propulsion transformer fault protection and diagnosis device, which can independently complete parameter detection, fault diagnosis and fault protection, but the scope is limited. The distributed control module can be installed in a distributed or lumped manner according to actual needs. For the whole device, since the calculation load is almost evenly distributed to each distributed control module, each module will not affect the response speed due to excessive calculation load, which improves the real-time response speed of the whole system. Moreover, the whole device can add or subtract the number of distributed control modules according to actual needs without making major changes to the system, which ensures the compactness and scalability of the whole system.

The technical effects of the utility model are: 1. On-line real-time parameter detection, fault diagnosis and fault protection, large detection range, wide protection range, clear fault diagnosis, reduced device development difficulty and development cost, and improved system security ; 2. Distributed processing, strong scalability, flexible installation, reduces the calculation amount of the master node, improves the response speed of the whole device, and the whole device can add or subtract the number of distributed control modules according to actual needs, without It is necessary to make major changes to the system to ensure the compactness and scalability of the entire system; 3. The software and hardware are isomorphic and interchangeable, which improves the versatility and maintainability of the system; 4. Internal CAN communication, and can Connect with other devices.

Description of drawings

Figure 1 is a schematic diagram of the structure of the propulsion transformer fault protection and diagnosis device.

Figure 2 is a system diagram of the propulsion transformer fault protection and diagnosis device.

Figure 3 is a functional diagram of the distributed control module.

Fig. 4 is a flow chart of the software main module of the propulsion transformer fault protection and diagnosis device.

Detailed ways

The propulsion transformer fault protection and diagnosis device described in the utility model is described by taking the monitoring object as an example of a Dd0y11 propulsion transformer, and the implementation is as follows:

The whole device includes power supply module, distributed control module, indicator light, buzzer, switch, OP panel and sensor interface. The structure diagram is shown in Figure 1, and the system diagram is shown in Figure 2.

The power module inputs AC220V and outputs DC24V/20A to provide unified power supply to the device. All bottom management modules, indicator lights, buzzers and OP panels in the device are powered by DC24V.

The distributed control module is code-named DCU, using high-performance digital signal processing chip TMS320F2812 as the core, with 10 AD ports for synchronous acquisition of analog signals, 8 switch input ports, 4 switch output ports and 4 bidirectional IO ports For digital control, it also provides 1 RS232 port, 1 RS485 port and 1 CAN port for network communication. There is 1 address selection switch in the module to set the address. The function diagram is shown in Figure 3.

The device has 5-way DCU modules. In order to realize hardware isomorphism, the hardware structure of the 5-way DCU modules is the same, and the address is set by the address selection switch in the module. In order to achieve software isomorphism, the main module needs to be designed according to the process shown in Figure 4.

The 5-way DCU modules in the device process the propulsion transformer information in a distributed manner, and use the CAN port for internal communication with each other, and retain the ability of external communication. Wherein, DCU1 processes the primary winding, and inputs are three current signals, three voltage signals and three temperature signals of the primary winding. DCU2 processes the secondary winding of the triangle, and the input is three current signals, three voltage signals and three temperature signals of the secondary side of the triangle. DCU3 processes the star-shaped secondary winding, and the input is three-way current signal, three-way voltage signal and three-way temperature signal of the star-shaped secondary side. DCU4 is the main controller. It summarizes the status of each winding from DCU1~3, judges the overall status of the transformer, controls relay protection, indicator lights and buzzers, and sends the overall status code of the transformer to the OP panel. In order to supplement the lack of automatic control, DCU4 also adds manual control (forced break switch and manual close switch), which is convenient for manual intervention. DCU5 handles the current vertical difference protection of the primary and secondary windings, and the input is 9 current signals of the primary and secondary windings.

There are 4 lights in the device. The power indicator light indicates whether the output of the power module is normal, and it is directly connected to the power supply. The device running indicator light indicates whether the 4-way DCU is normal and is controlled by DCU4. The fault alarm indicator light indicates whether the transformer is faulty or not, and is controlled by DCU4. The relay protection indicator light indicates whether the device has relay protection action, which is controlled by DCU4.

The device has 1 buzzer. When the device fails or the transformer fails, the buzzer will act.

There are 4 switches in the device. The power switch controls the AC220V input. The manual break switch and the manual close switch force the device to issue a break command or a close command. The buzzer disable switch controls whether the device uses the buzzer.

The device has 1 OP panel (for operation and display), which receives data packets from DCU4 and displays the working information of the transformer to be tested, the fault point information of the transformer to be tested and the action status of the controlled circuit breaker.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Claims (8)

1. advance transformer fault protection and a diagnostic device, it is characterized in that: power module, at least five road distributed control modules, indicator lamp, buzzer, switch, OP panel and sensor interface; Described five road distributed control modules are the first distributed control module, the second distributed control module, the 3rd distributed control module, the 4th distributed control module and the 5th distributed control module respectively; Identical first distributed control module of five road DCU module hardware structures, the second distributed control module, the 3rd distributed control module, the 5th distributed control module adopt CAN to be connected with the 4th distributed control module simultaneously; Described 4th distributed control module and indicator lamp, buzzer, switch, OP panel; Sensor interface comprises voltage sensor interface, current sensor interface, temperature sensor interface; Described first distributed control module is provided with voltage sensor interface, current sensor interface, temperature sensor interface; Described 5th distributed control module is provided with.

2. one according to claim 1 advances transformer fault protection and diagnostic device, it is characterized in that:

First distributed control module process former limit winding, is input as three road current signals of former limit winding, three road voltage signals and three road temperature signals;

Second distributed control module process triangle vice-side winding, is input as three road current signals of triangle secondary, three road voltage signals and three road temperature signals;

3rd distributed control module process star vice-side winding, is input as three road current signals of star secondary, three road voltage signals and three road temperature signals;

4th distributed control module is master controller, each winding state that it transmits according to the first distributed control module, the second distributed control module, the 3rd distributed control module gathers, judge transformer whole state, control relay protection, indicator lamp and buzzer, and transformer whole state code is mail to OP panel;

The Current Differential Protection of the former vice-side winding of the 5th distributed control module process, is input as 9 road current signals of former secondary.

3. one according to claim 1 advances transformer fault protection and diagnostic device, it is characterized in that: power module input AC220V, exports DC24V/20A, provides unified power supply to device; In device, all bottom administration modules, indicator lamp, buzzer, OP panel are DC24V and power.

4. one according to claim 1 advances transformer fault protection and diagnostic device; it is characterized in that: distributed control module adopts high performance digital signal process chip TMS320F2812 as core; 10 road AD ports are had to carry out analog signal synchronous acquisition; there are 8 way switch input ports, 4 way switch output ports and 4 tunnels two-way IO port carries out digital control; also provide 1 road RS232 port, 1 road RS485 port and 1 road CAN port to carry out network communication, in module, have address selection switch setting address, No. 1.

5. one according to claim 1 advances transformer fault protection and diagnostic device, it is characterized in that: indicator lamp has 4 tunnels; Whether power supply indicator instruction power module exports normally, is directly connected on power supply; Whether plant running indicator lamp indicates 4 road DCU normal, controls by DCU4; Fault alarm indicator lamp indicating transformer has fault-free, controls by DCU4; Relay protection indicator lamp indicating device, with or without relay protection action, controls by DCU4.

6. one according to claim 1 advances transformer fault protection and diagnostic device, it is characterized in that: buzzer is 1 tunnel; When plant running fault or transformer break down, buzzer action.

7. one according to claim 1 advances transformer fault protection and diagnostic device, it is characterized in that: in device, switch has 4 tunnels; Power switch control AC220V inputs; Manually disconnected lock switch and closing by hand switch forcing device send disconnected lock instruction or reclosing command; Whether buzzer disabled switch control device uses buzzer.

8. one according to claim 1 advances transformer fault protection and diagnostic device; it is characterized in that: device has 1 road OP panel; receive the packet that transmits of DCU4, show the job information of transformer to be measured, transformer to be measured trouble point information and control the operating state of breaker.