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A Field Measurement Method of Reactive Current Compensation Rate of Generator Excitation System

A current compensation and excitation system technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, electrical components, etc., can solve problems such as difficulty in realization, harsh test conditions, and large impact on system stability, and achieve calculation methods The effect of simplicity, good robustness and strong engineering practicability

Active Publication Date: 2021-07-23
CHINA ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Existing methods for measuring reactive current compensation rate, such as dumping rated reactive power, have harsh test conditions, are difficult to implement, and have a great impact on system stability, so they are not suitable for general use.

Method used

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  • A Field Measurement Method of Reactive Current Compensation Rate of Generator Excitation System
  • A Field Measurement Method of Reactive Current Compensation Rate of Generator Excitation System
  • A Field Measurement Method of Reactive Current Compensation Rate of Generator Excitation System

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Embodiment 1

[0030] Such as figure 1 As shown, a method for on-site measurement of reactive current compensation rate of generator excitation system in an embodiment of the present invention includes steps:

[0031] S210, measuring the first terminal voltage of the generator when no reactive current compensation is added.

[0032] In this embodiment, a generator refers to a mechanical device that converts other forms of energy into electrical energy. It is driven by a water turbine, steam turbine, diesel engine or other power machinery, and converts the energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy. Passed to the generator, and then converted into electrical energy by the generator. There are many types of synchronous generators, such as steam turbine generators, hydraulic generators, nuclear power generators, gas turbine generators, solar thermal generators, and diesel generators. The first generator terminal voltage refers to the ac...

Embodiment 2

[0041] Such as figure 2 As shown, in the embodiment of the present invention, the reactive current compensation reactance calculated according to the first machine terminal voltage, the second machine terminal voltage and reactive power includes:

[0042] S331. Calculate and obtain the reactive current of the generator according to the second generator terminal voltage and reactive power.

[0043] In this embodiment, the reactive current of the generator is the ratio of the reactive power of the generator to the voltage of the second machine terminal.

[0044] S332. Calculate reactive current compensation reactance according to the reactive current of the generator, the first generator terminal voltage and the second generator terminal voltage.

[0045] In this embodiment, the first machine terminal voltage is equal to the sum of the product of the second machine terminal voltage and the reactive current of the generator and the reactive current compensation reactance, then ...

Embodiment 3

[0051] An embodiment of the present invention is a generator, including an excitation system that adopts the on-site measurement method for the reactive current compensation rate of the excitation system of the generator in the above embodiment. The reactive current compensation rate can be used to control the reactive parameters and voltage of the excitation system, so as to ensure the stability of the reactive parameters and voltage of the power system.

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Abstract

The invention discloses an on-the-spot measurement method for the reactive current compensation rate of a generator excitation system, belonging to the technical field of electric power generation. The on-site measurement method of the reactive current compensation rate of the generator excitation system according to the embodiment of the present invention. The on-site measurement method of the reactive current compensation rate of the generator excitation system includes: measuring the first machine terminal voltage of the generator when no reactive current compensation is added; Adding reactive current compensation to the generator, and measuring the second machine terminal voltage and reactive power of the generator at the same time; according to the first machine terminal voltage, the second machine terminal voltage and reactive power, calculating the reactive current compensation Reactance: Calculate the reactive current compensation rate according to the reactive current compensation reactance and generator reactance base value per unit. The invention can simply calculate the reactive current compensation rate of the generator by testing the terminal voltage of the generator before and after reactive current compensation and the reactive power of the generator after compensation, the operation method is safe and simple, and can be effectively applied to the environment Complex large interconnected power systems.

Description

technical field [0001] The invention relates to the technical field of electric power generation, and more specifically, relates to a method for on-site measurement of reactive current compensation rate of an excitation system of a generator. Background technique [0002] With the development of UHV AC and DC large-scale interconnected power systems, the safe and stable operation of power systems is becoming increasingly important. The generator excitation system plays a very significant role in system voltage stability and reactive parameter stability. Now most of the large-scale power plants use a generator connected to a main transformer, which is the wiring method of the transformer group. The low-voltage side of the main transformer of the generator is connected to the generator terminal, and the high-voltage side of the main transformer is connected to the high-voltage bus. The generators are connected to the same bus through their respective main transformers. There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCH02J3/1885Y02E40/30
Inventor 霍承祥高磊李志强朱艳卿吴剑超杨超魏巍马晓光武朝强韩志勇李照庭于大海何凤军卜广全
Owner CHINA ELECTRIC POWER RES INST