Analysis on Primary Frequency Regulation Function Tests for Thermal Power Units

2014 ◽  
Vol 986-987 ◽  
pp. 1187-1190
Author(s):  
Li Jie Kang ◽  
Wei Ping Liang
Keyword(s):  
Power Supply ◽  
Load Capacity ◽  
Power Grid ◽  
Thermal Power ◽  
Vital Role ◽  
Frequency Regulation ◽  
Regulation Function ◽  
The Stability ◽  
Primary Frequency ◽  
Power Dispatching

With the increase of the load capacity and the development of the automation degree, the power dispatching center has a higher requirement for the primary frequency regulation function of the unit aircrew. After a certain period of time when the unit has been put into operation, the primary frequency regulation function must have the conditions to be put into operation, so that the unit can be involved in grid frequency at any time when the conditions are satisfied and the power supply quality can be fully guaranteed [1]. The regulation performance of primary frequency regulation plays a vital role in maintaining the stability of the unit aircrew and the power grid, so it is very necessary to conduct the frequency tests for the thermal power units [2]. In this paper, we describe the disturbance tests and recovery tests under different load points and different network frequencies. Through the analysis, we can draw the conclusion that the primary frequency regulation function of unit 1 can fully meet the requirement of the frequency regulation of the power grid.

Research and Optimization of Thermal Power Unit's Automatic Control Based on Frequency Regulation Ability of Power Grid

2013 ◽  
Vol 330 ◽  
pp. 606-610 ◽  
Author(s):  
Jun Li ◽  
Wei Wei Li
Keyword(s):  
Power Systems ◽  
Automatic Control ◽  
Power Grid ◽  
Thermal Power ◽  
Optimal Operation ◽  
Theory And Practice ◽  
Frequency Regulation ◽  
Frequency Compensation ◽  
The Stability ◽  
Primary Frequency

Wind power and other new energy connected to power grid bring new challenges to optimal operation of power systems. The stability of power grid mainly depends on primary frequency compensation and secondary frequency compensation of thermal power units. By analyzing the theory and practice of DEH and coordinated control system (CCS) of thermal power units, combined with the insufficient of actual primary frequency compensation and automatic power generation control (AGC) strategy response to frequency of accidents, the optimization of primary frequency compensation and AGC of thermal power units automatic control were offered. The practical application results show that the proposed control strategy can effectively control the thermal power units to achieve the stability of power grid frequency.

Research on the Primary Frequency Regulation of the Large Capacity Thermal Power Units

2014 ◽  
Vol 608-609 ◽  
pp. 915-919 ◽  
Author(s):  
Hong Xia Wu
Keyword(s):  
Power Plant ◽  
Control Method ◽  
Power Grid ◽  
Thermal Power ◽  
Frequency Regulation ◽  
Load Curve ◽  
Large Capacity ◽  
Continuous Increase ◽  
Important Index ◽  
Primary Frequency

Frequency is an important index of power quality, primary frequency regulation is of great significance for maintaining the grid frequency. In recent years, with the expansion of the power grid capacity and the continuous increase of the generator capacity, the large capacity units play a role is becoming more and more important in the primary frequency regulation of power grid. This paper takes ultra supercritical coal-fired units (1000MW) of a power plant of Hubei for example, primary frequency regulation control method, requency offset load curve and so on were studied through relevant test.

scholarly journals Analysis of Primary Frequency Regulation Ability of Shandong Power Grid Thermal Power Unit

2021 ◽  
Vol 1820 (1) ◽  
pp. 012022
Author(s):  
En Ren Liu ◽  
Jun Li ◽  
Song Gao ◽  
Xiang rong Meng ◽  
Shuo Shi ◽  
...  
Keyword(s):  
Power Unit ◽  
Power Grid ◽  
Thermal Power ◽  
Frequency Regulation ◽  
Primary Frequency

Logic Design of Improved Backup Power Automatic Switching Considering the Influence of Small Hydropower Stations

2012 ◽  
Vol 463-464 ◽  
pp. 1638-1642
Author(s):  
Chen Jie Zhou ◽  
Yi Xiong ◽  
Liang Qin ◽  
Xiao Ming Zha
Keyword(s):  
Power Supply ◽  
Power Grid ◽  
Logic Design ◽  
Small Hydropower ◽  
Distributed Power ◽  
The Stability ◽  
Reliable Power Supply ◽  
Hydropower Stations ◽  
Small Capacity ◽  
Automatic Switching

The correct and quick operation of backup power automatic switching（BPAS）devices is an effective guarantee of reliable power supply to the system. However, when transformer substations are connected to small-capacity distributed power like the local small hydropower stations, the conventional BPAS devices usually fail to get into operation, which leads to the loss of power in some parts of the system. To solve this shortage，this article comes up with an improved scheme of BPAS, which has been proved through PSCAD simulation to be effective in enhancing the stability and reliability of the power grid

scholarly journals Adaptive Droop Coefficient and SOC Equalization-Based Primary Frequency Modulation Control Strategy of Energy Storage

Electronics ◽  
2021 ◽  
Vol 10 (21) ◽  
pp. 2645
Author(s):  
Gaojun Meng ◽  
Yang Lu ◽  
Haitao Liu ◽  
Yuan Ye ◽  
Yukun Sun ◽  
...  
Keyword(s):  
Energy Storage ◽  
Frequency Modulation ◽  
Control Strategy ◽  
Simulation Analysis ◽  
Power Grid ◽  
Frequency Regulation ◽  
Storage Battery ◽  
Load Disturbance ◽  
Modulation Control ◽  
Primary Frequency

In order to efficiently use energy storage resources while meeting the power grid primary frequency modulation requirements, an adaptive droop coefficient and SOC balance-based primary frequency modulation control strategy for energy storage is proposed. Taking the SOC of energy storage battery as the control quantity, the depth of energy storage output is adaptively adjusted to prevent the saturation or exhaustion of energy storage SOC. The balanced control strategy is introduced to realize the rational utilization of resources and the fast balance of SOC in the process of primary frequency modulation of energy storage battery under different charge states. Then, four evaluation indexes are proposed to evaluate the effect of primary frequency modulation and SOC maintenance. Taking a regional power grid as an example, a simulation analysis is carried out under step load disturbance and continuous load disturbance. According to the simulation results, the proposed control strategy is effective in power system frequency regulation and battery SOC maintenance.

scholarly journals Frequency Modulation Method and System of Photovoltaic Virtual Synchronous Generator Based on Computer Technology

2021 ◽  
Vol 2143 (1) ◽  
pp. 012028
Author(s):  
Jiangfeng Zhang ◽  
Ye Su ◽  
Keke Zheng ◽  
Liyun Hua
Keyword(s):  
Power Generation ◽  
Power Grid ◽  
Synchronous Generator ◽  
Clean Energy ◽  
Voltage Regulation ◽  
Frequency Regulation ◽  
Important Research ◽  
Photovoltaic Power ◽  
Primary Frequency ◽  
Virtual Synchronous Generator

Abstract With people’s attention to environmental protection, clean energy has become an important research and development direction. Among them, photovoltaic power generation has many advantages, such as simple process, no fuel consumption, no noise, no pollution and so on. The power grid capacity is becoming larger and larger, and has a great impact on the environment. Therefore, the grid connection of photovoltaic power generation will cause major problems for the planning, operation and dispatching of power grid. Virtual synchronous generator (hereinafter referred to as VSG) technology can simulate the inertia, primary frequency regulation and voltage regulation characteristics of synchronous generator, which has become an important way to improve the dynamic frequency response ability of the system. Therefore, VSG technology has become an important research technology of photovoltaic grid connected system, among which FM method will also become an important research direction. Firstly, this paper analyzes the VSG algorithm and its basic characteristics. Finally, this paper analyzes the control scheme of overall primary frequency regulation of photovoltaic power station (hereinafter referred to as PPS).

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