Power Dispatch - Management to Ensure the Safe Operation of the Power Grid

Power dispatching is an effective management method adopted to ensure the safe and stable operation of the power grid, reliable external power supply, and orderly progress of various power production tasks. The specific work content of power dispatching is based on the data information fed back by various information collection equipment, or the information provided by monitoring personnel, combined with the actual operating parameters of the power grid, such as voltage, current, frequency, load, etc., and comprehensively considering the development of various production tasks , judge the safety and economic operation status of the power grid, issue operating instructions through telephone or automatic system, and direct on-site operators or automatic control system to make adjustments, such as adjusting generator output, adjusting load distribution, switching capacitors, reactors, etc., so that Ensure the continuous safe and stable operation of the power grid. In recent years, with the continuous development of science and technology, modern monitoring and control methods have been continuously improved, and the technical support for power dispatching has become increasingly powerful.

1. Basic introduction to power dispatching

"Power cuts" are due to the fact that the output of power grid generators cannot meet the demand for power loads, or the power transmission and transformation equipment can no longer carry more loads. In the case of adjusting the load distribution and still unable to meet the above operating requirements, in order to To ensure the safety of the power grid or power transmission and transformation equipment, artificial load shedding measures are taken.

2. Main functions of power dispatching

The purpose of installing an industrial TV monitoring system in power regulation is to improve the speed of emergency response to emergencies during the period of time to ensure power dispatch and power supply, and to further ensure the safe operation level of power supply. Responsible for coordinating, organizing, commanding and directing power grid related work.

2.1 Monitoring of equipment

It mainly includes the main transformer, circuit breaker, voltage transformer, current transformer, switch in the high voltage room, power panel and control panel in the main control room, etc. By installing cameras, sensing probes and other devices at the monitoring object, the monitoring of primary and secondary equipment and its operation is realized, such as: whether there is external damage to the main transformer and switch, the oil level of the main transformer and the gauges and lights on the control panel Whether the signal is normal, etc.

2.2 Fire prevention and anti-theft

After the substation is evacuated, in case of a fire in the substation, the handling of the accident is often delayed because it cannot be discovered in time, causing the accident to further expand. In addition, when thieves break into the substation, there is also a lack of effective means of defense. For this reason, a group of smoke or temperature probes can be installed in the high-pressure room and the main control room, and through-beam infrared probes can be installed around the enclosure. When the probe senses smoke, high temperature or someone breaks in, it will send an alarm message to the background, and at the same time switch the camera screen in a linked manner, and record the situation at the scene at that time.

2.3 Control of lighting and intelligent equipment

In order to make the industrial TV monitoring system still function at night, the lights of the substation should have the function of time switch or remote control; and some intelligent equipment, such as probes, access control, etc., can also be controlled remotely.

3. Basic tasks of power dispatching

3.1 Collect data

The electrical parameters of the station (substation OR power plant) are collected by the RTU, including telemetry data such as switch position, protection signal, voltage and current.

3.2 Transfer information

The information collected by the RTU is transmitted to the master station system (front-end processor, server) through a reliable channel, and the control commands issued by the master station are transmitted to the station end.

3.3 Data processing

The collected information is processed, screened and calculated.

3.4 Human-machine connection

Present the processed information to the user through a friendly interface, and realize remote control and remote adjustment functions.