Application and Effect Evaluation of High-Voltage DC Power Supply Technology in Grid Frequency Regulation

With the development of modern power electronics technology, high-voltage direct current (HVDC) power supply technology has been widely applied in the power system due to its unique performance. This article will explore the application of high-voltage DC power supply technology in grid frequency regulation from a professional perspective and evaluate its effects.

I. Overview of High-Voltage DC Power Supply Technology

High-voltage DC power supply technology is a technique that converts alternating current (AC) into direct current (DC) through power electronic devices. Compared with traditional AC power supplies, high-voltage DC power supplies have the advantages of stable output voltage, easy control of current, and high transmission efficiency. In the power system, high-voltage DC power supply technology is mainly used in long-distance power transmission, large-capacity power transmission, and grid frequency regulation, etc.

II. Application of High-Voltage DC Power Supply Technology in Grid Frequency Regulation

Grid frequency is one of the important indicators to measure the stability of the power system. When the grid load changes, the frequency of the grid will also fluctuate. In order to maintain the stable operation of the grid, it is necessary to timely and accurately adjust the grid frequency. High-voltage DC power supply technology plays an important role in this process.

1. Frequency Regulation Principle

The high-voltage DC power supply adjusts the grid frequency by controlling the magnitude of its output power. When the grid load increases, the high-voltage DC power supply increases its output power to supplement the power shortage of the grid, thereby maintaining the stability of the grid frequency; conversely, when the grid load decreases, the high-voltage DC power supply reduces its output power to avoid overloading the grid, while still maintaining the stability of the grid frequency.

2. Application Examples

In actual power systems, high-voltage DC power supply technology has been widely applied in cross-regional power transmission, large generator unit excitation, new energy grid connection, and other fields, achieving effective regulation of grid frequency. For example, in cross-regional power transmission, by adjusting the output power of the high-voltage DC power supply, it is possible to effectively alleviate the load pressure of the receiving end grid and improve the operational stability of the grid.

III. Effect Evaluation

In order to evaluate the effect of high-voltage DC power supply technology in grid frequency regulation, the following aspects can be analyzed:

1. Regulation Accuracy

High-voltage DC power supply technology has high regulation accuracy and can accurately control the grid frequency. By monitoring the change of grid frequency in real-time, the high-voltage DC power supply can respond quickly and adjust its output power, keeping the grid frequency within the allowable range.

2. Stability

High-voltage DC power supply technology has good stability and can maintain the stability of its output power under various operating conditions. This is crucial for maintaining the stability of the grid frequency, especially when the load fluctuates greatly.

3. Economy

Although the initial investment of high-voltage DC power supply technology is relatively high, from a long-term perspective, its economic benefits in grid frequency regulation are significant. By reducing the number of unit start-stops due to frequency fluctuations and lowering network losses, high-voltage DC power supply technology can reduce the operating costs of the power system.

IV. Conclusion

In summary, high-voltage DC power supply technology has significant application effects in grid frequency regulation. Its high regulation accuracy, good stability, and economy make it an indispensable important support for modern power systems. With the continuous advancement of power electronics technology, it is believed that the application of high-voltage DC power supply technology in grid frequency regulation will be more extensive and in-depth.