A Realization Method of Low Excitation Limit of Excitation Regulator
A technology of excitation regulator and low excitation limitation, which is applied in the direction of controlling generators and synchronous generators through magnetic field changes, and can solve the problems of complex and troublesome setting process of excitation regulator low excitation limitation
Active Publication Date: 2021-07-06
合肥市睿电电气技术咨询服务有限责任公司
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Problems solved by technology
[0003] However, in the operation process of the existing synchronous generator, the low-excitation limit setting process of the excitation regulator is relatively complicated, and it is troublesome in practical application; in order to solve this technical defect, a solution is now provided
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Embodiment 1
[0024] Embodiment 1, the method comprises the following steps:
[0025] Step 1: Set the limit value of synchronous generator power angle to δref;
[0026] Step 2: During the operation of the synchronous generator, calculate the cosine value cosδ of the generator power angle δ at the low excitation limit;
[0027] Step 3: When the generator power angle δ is greater than the generator power angle limit value δref, calculate the cosine deviation errUEL=cos(δref)-cosδ, and the low excitation limiter outputs a low excitation limit signal to increase the generator excitation voltage.
[0028] Wherein, the power angle limit value δref is the setting value of the low excitation limit value, which needs to be set by technical personnel according to the actual parameters of the unit, and should not exceed 90 degrees.
[0029] Among them, the low excitation limit value calculation generator power angle δ is the value calculated by the low excitation limiter according to the generator ac...
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The invention discloses a method for realizing low-excitation limitation of an excitation regulator. The method includes: setting the synchronous generator power angle limit value δref, and calculating the generator power angle δref with the low-excitation limit value during the operation of the synchronous generator When the generator power angle δ is greater than the generator power angle limit value δref, the cosine deviation err=cos(δref)‑cosδ is calculated, and the low excitation limiter outputs a low excitation limit signal. Compared with the traditional low excitation limiter, the present invention only needs to input a fixed value, the calculation process is simple, and the calculation amount is small, and the cosine value of the power angle is used as the control object. The larger the power angle is, the smaller the output cosine deviation value is, and the adjustment is more efficient. Stable and more reliable.
Description
technical field [0001] The invention belongs to the technical field related to power system operation and safety, in particular to a method for realizing low excitation limitation of an excitation regulator. Background technique [0002] The excitation regulator of the self-shunt excitation static rectification excitation system develops from semiconductor discrete components to integrated solid components, and from analog to digital. Excitation regulators can be divided into three categories: semiconductor analog excitation regulators, microcomputer-containing programmable controller digital excitation regulators, and hybrid microcomputer-containing programmable controller analog excitation regulators. [0003] However, in the operation process of the existing synchronous generator, the low-excitation limit setting process of the excitation regulator is relatively complicated, and it is troublesome in practical application; in order to solve this technical defect, a solutio...
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IPC IPC(8): H02P9/14H02P103/20
CPCH02P9/14H02P2103/20
Inventor 桂刚张锦春王帅夏云龙仰帅龚梦杰
Owner 合肥市睿电电气技术咨询服务有限责任公司