CN203133204U - Transformer DC magnetic biasing monitoring system - Google Patents

Abstract

The utility model relates to a transformer DC magnetic biasing monitoring system which comprises a sensor, a data real-time acquisition terminal, wireless communications equipment, a local monitoring PC and a remote monitoring server. The sensor is connected with the data real-time acquisition terminal which is connected with the local monitoring PC through the wireless communications equipment. The local monitoring PC is connected with the remote monitoring server. Compared with the prior art, the transformer DC magnetic biasing monitoring system has the advantages of good security, high reliability, high data transmission speed and convenient installation.

Description

A Transformer DC Bias Monitoring System

technical field

The utility model relates to a transformer state monitoring technology, in particular to a transformer DC bias magnetic monitoring system.

Background technique

The Shanghai power grid has long been short of supply and insufficient power, and has become a typical multi-infeed DC system grid, with multiple DC grounding electrodes put into operation. When the high-voltage DC system operates with a single-pole ground loop, a huge DC current flows into the ground through the DC ground electrode, and causes significant changes in ground potential in a wide range. This change in ground potential may have an impact on the AC system in the same area. Two substations at different DC potentials form a loop through the transmission line, and DC current will flow to the neutral point of the transformer and the transformer winding. Make the DC bias phenomenon appear in the transformer, cause the transformer noise to increase, and the vibration to increase.

In the Shanghai power grid, the above impacts have already appeared. For example, the neutral point current of the main transformer of the 220kV Qianlian Station exceeds 44.5A, and generates noise of more than 94dB; Significantly increased noise etc. The harm of DC bias to transformer is long-term. At present, transformer manufacturers do not guarantee the reliability of long-term operation of transformers subjected to DC bias, and there is no effective quality inspection device.

Utility model content

The purpose of this utility model is to provide a transformer DC bias magnetic monitoring system with good safety, high reliability, fast data transmission speed and convenient installation in order to overcome the above-mentioned defects in the prior art.

The purpose of this utility model can be achieved through the following technical solutions:

A transformer DC bias monitoring system, characterized in that it includes a sensor, a real-time data collection terminal, a wireless communication device, a local monitoring PC and a remote monitoring server, the sensor is connected to the real-time data collection terminal, and the real-time data collection The terminal is connected with a local monitoring PC through a wireless communication device, and the local monitoring PC is connected with a remote monitoring server.

The sensors include current sensors and vibration sensors. The current sensor is a Hall current sensor. The local monitoring PC is connected with the remote monitoring server through the mobile communication network.

Compared with the prior art, the utility model has the following advantages:

1. Good safety, real-time monitoring of the transformer, ensuring the reliable operation of the transformer;

2. High reliability, through local and remote two-level monitoring, which improves the monitoring accuracy;

3. The data transmission speed is fast, the installation is convenient, and the data transmission adopts wireless mode, thus reducing the trouble of wiring.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

As shown in Figure 1, a transformer DC bias monitoring system includes a sensor, a real-time data acquisition terminal 1, a wireless communication device 2, a local monitoring PC3 and a remote monitoring server 4, the sensor is connected to the real-time data acquisition terminal 1, The real-time data collection terminal 1 is connected with 2 local monitoring PC3 through wireless communication equipment, and the local monitoring PC3 is connected with remote monitoring server 4 .

The sensors include a current sensor CT and a vibration sensor 5 . The current sensor is a Hall current sensor. The local monitoring PC3 is connected with the remote monitoring server 4 through the mobile communication network.

Each part function of the present utility model is as follows:

(1) Transformer neutral point Hall current sensor CT and vibration sensor 5 are used to collect the neutral point current and vibration signals of the transformer;

(2) Data real-time acquisition terminal 1, real-time acquisition of signals monitored by CT and vibration sensors, and corresponding processing;

(3) wireless communication equipment 2, the real-time acquisition equipment is connected with the local monitoring PC3;

(4) The local monitoring PC3 can receive data through wireless communication and collect the data monitored by the terminal 1 in real time, and can change the collected parameters;

(5) The local monitoring PC3 of each substation can view the DC bias condition of each substation monitored on the remote monitoring server 4 through wireless data transmission and summarization, and can control the monitoring equipment.

Claims (4)

1. transformer DC magnetic bias monitoring system, it is characterized in that, comprise sensor, real time data acquisition terminal, wireless telecommunications system, local monitoring PC and remote monitoring server, described sensor is connected with the real time data acquisition terminal, described real time data acquisition terminal is connected with local monitoring PC by wireless telecommunications system, and described local monitoring PC is connected with remote monitoring server.

2. a kind of transformer DC magnetic bias monitoring system according to claim 1 is characterized in that described sensor comprises current sensor and vibration transducer.

3. a kind of transformer DC magnetic bias monitoring system according to claim 2 is characterized in that, described current sensor is Hall current sensor.

4. a kind of transformer DC magnetic bias monitoring system according to claim 1 is characterized in that, described local monitoring PC is connected with remote monitoring server by mobile communications network.

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