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New energy power station AVC system and reactive real-time regulating quantity calculation method thereof

A calculation method and technology of power stations, applied in reactive power adjustment/elimination/compensation, reactive power compensation, AC network voltage adjustment, etc., can solve problems such as many adjustment times, long adjustment process, and easy oscillation adjustment

Active Publication Date: 2018-02-27
XUJI GRP +2
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a new energy power station AVC system and its reactive power real-time adjustment calculation method to solve the existing problems in the prior art in the reactive power adjustment process of new energy power stations. Prone to Oscillating Regulation Phenomenon

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  • New energy power station AVC system and reactive real-time regulating quantity calculation method thereof
  • New energy power station AVC system and reactive real-time regulating quantity calculation method thereof
  • New energy power station AVC system and reactive real-time regulating quantity calculation method thereof

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Embodiment Construction

[0087] The invention provides a reactive voltage control method of a new energy power station based on dynamic response parameters.

[0088] The way of connecting new energy power stations to the power system generally adopts a two-stage step-up method. The primary wiring diagram and the micro-increment of the voltage and reactive power flowing through the primary electrical equipment in the power station with the control action can be used in the equivalent circuit diagram to express, such as figure 1 with figure 2 As shown (the bus voltage, reactive power and transformer ratio in the figure only show the variation). The electric energy generated by the power generation equipment (such as photovoltaic panels or fans) of the new energy power station should be converted into low-voltage (such as 300V, 690V) alternating current through the inverter, and then boosted to a Appropriate voltage level (such as 10kV, 35kV); multiple primary step-up transformers run in parallel and ...

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Abstract

The invention relates to a new energy power station AVC system and a reactive real-time regulating quantity calculation method thereof. The method comprises the steps that by means of a series of characteristic values, a model which generates variation for parameters such as high voltage side bus voltage, middle voltage side bus voltage, low voltage side bus voltage and power station output reactive power after an electric generator increases or reduces reactive output, a middle voltage side bus or a high voltage side bus compensates reactive power, or the two-stage transformer tapping switchposition is raised or lowered is built. When the power station AVC system runs on the spot, the model can serve as an internal algorithm to be introduced into the AVC system, the AVC system is assisted to make a reactive compensation switching strategy rapidly and accurately, and a new power station AVC system is generated. The new AVC system can meet the rapid adjustment response time requirements of voltage and reactive power, the voltage and reactive power of the power station are maintained to be within the given target value range at any time, and the electric energy quality output by thepower station is improved.

Description

technical field [0001] The invention relates to an AVC system of a new energy power station and a method for calculating a reactive power real-time adjustment amount thereof, belonging to the technical field of electric power systems. Background technique [0002] When the power system is in normal operation, the power flow and voltage level should be controlled through preventive control, so as to maintain the stable operation of the grid power angle and have the necessary stability reserves. According to the principle of layering and partitioning, the reactive power of the system is reasonably adjusted through preventive control, the system voltage is maintained in a stable operating range, and an appropriate reactive power reserve is maintained to ensure the voltage stability of the system under normal disturbances or load fluctuations and reduce dynamic stability control. probability of occurrence. [0003] At present, the country is vigorously developing the constructi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02J3/16
CPCH02J3/16H02J3/18H02J2203/20Y02E40/30
Inventor 彭世康马红伟孙锐毛建容张鹏董建岭
Owner XUJI GRP
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