Optimization Method of Parameters of Power-Frequency Electro-hydraulic Control System of Large Steam Turbine in Thermal Power Plant
An electro-hydraulic control system and thermal power plant technology, applied in the direction of electrical digital data processing, special data processing applications, reducing/preventing power oscillation, etc., can solve the problem of low-frequency oscillation and speed regulation induced by power-frequency electro-hydraulic control systems without parameter optimization System stability issues, etc.
Active Publication Date: 2015-09-16
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
A large gain of the speed control system can realize rapid adjustment of frequency, but when the gain is too large, the speed control system of the generator set may have stability problems, so it needs to be optimally controlled
The current research only discusses the influence of different steam turbine control methods on low-frequency oscillations, and does not formulate measures to prevent low-frequency oscillations induced by power-frequency electro-hydraulic control systems from the perspective of parameter optimization
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0075] Taking a 600MW turbogenerator set in a power plant as an example, compare figure 1 The present invention is further described. figure 2 is the third-order transfer function model of the steam turbine, image 3 is the block diagram of the digital electro-hydraulic control system, Figure 4 is the power-frequency electro-hydraulic control system model of the turbogenerator set, H is the rotor inertia time constant, K s is the synchronous torque coefficient, K D is the damping moment coefficient, ω 0 is the reference angular velocity, Δδ is the generator power angle increment, Δω is the rotor angular velocity increment, T 1 is the oil motor time constant, K P is the amplification factor of the DEH controller, T CH is the time constant of the inlet chamber, F HP is the power coefficient of the high pressure cylinder, K δ FM magnification, ΔP m is the mechanical power increment, ΔP e is the electromagnetic power increment, Δμ T In order to adjust the valve openin...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the technology of preventing and controlling low frequency oscillation of a large-capacity turbo generator set of a thermal power plant, and discloses a method for coordinating and optimizing parameters of a steam turbine power-frequency electro-hydraulic control system. The method considers influence of the steam turbine power-frequency electro-hydraulic control system on the stability of a power system combines primary frequency modulation performance of the set with dynamic stability allowance requirement of the system, and obtains parameters of the power-frequency electro-hydraulic control system via an intelligent optimization algorithm. The method can coordinate dynamic stability with primary frequency modulation performance, thereby effectively preventing the low frequency oscillation of the steam turbine generator set caused by power-frequency electro-hydraulic control, and ensuring safe and stable operation of the large interconnected electrical network.
Description
technical field [0001] The invention relates to a method for preventing and controlling low-frequency oscillation of a large-capacity steam turbine generator set in a thermal power plant, in particular to a method for optimizing parameters of a power-frequency electro-hydraulic control system of a large steam turbine in a thermal power plant. Background technique [0002] The phenomenon of low-frequency oscillation occurs frequently in the power system, which seriously affects the safe and stable operation of the power grid. Negative damping caused by a fast, high-top magnification excitation system is the main reason for inducing low-frequency oscillations. The Power System Stabilizer (PSS) designed based on this mechanism can effectively suppress this type of low-frequency oscillations through phase compensation. effect. However, with the development of the power system, there is a phenomenon that low-frequency oscillation occurs even if the PSS is installed, which cannot...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24G06F19/00
Inventor 翁洪杰徐衍会陈锐朱良合张毅超吴晓宇罗运松
Owner GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD