Tuning method for difference coefficient of synchronous generator excitation system

Abstract

The invention provides a tuning method for a difference coefficient of a synchronous generator excitation system. The method comprises the following steps: firstly, clearly distinguishing the number of regional central points, an operating voltage of each central point in each period, the number of generator nodes, active output power of each generator, and a load value of power supply by each generator; then, calculating a standard deviation index of a central point voltage, measuring voltage fluctuation, calculating an average active power grid loss rate index, and considering the operationeconomy of the system; and finally, establishing a multi-objective optimization model of the difference coefficient of the synchronous generator excitation system, taking the minimum of the standard deviation of the central point voltage and the average active power grid loss rate as an objective, and calculating an optimal difference coefficient by considering constraint conditions such as powerflow constraint, control variable constraint and safety constraint. According to the tuning method for the difference coefficient of the synchronous generator excitation system, grid voltage can be effectively improved and power grid loss can be effectively reduced.

Description

technical field [0001] The invention relates to the field of synchronous generators, in particular to a method for setting the adjustment coefficient of the excitation system of the synchronous generator, which is suitable for setting the adjustment coefficient of the excitation system of the synchronous generator in the same industry. Background technique [0002] Power system reactive power and voltage control and management is an important part of improving power quality, reducing network loss and ensuring safe and economical operation of the power grid, and it is also the focus of researchers and operators. Voltage is one of the important indicators to measure power quality. The grid voltage level depends on the balance of reactive power in the power system. When the balance between reactive power and reactive load in the system is broken, it will cause grid voltage fluctuations and network losses. Increase. Therefore, the reactive power and voltage control of the power...

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Problems solved by technology

[0005] At present, the power grid enterprise management department sets the adjustment coefficient of the generator excitation system in accordance with the national standards for the technical requirements of the generator excitation system, with the goal of ensuring the safe operation of the generators in the power plant and the reasonable distribution of reactive power between generators running in parallel, and Does not consider the supporting effect of generator excitation system adjustment coefficient on improving grid voltage and reducing grid loss

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