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New energy power station voltage control system and method based on inverter phasing operation

A technology of voltage control system and phase modulation operation, which is applied in the direction of AC network voltage adjustment, photovoltaic power generation, electrical components, etc., and can solve problems such as partial power flow reversal, hidden dangers of power grid safe operation, excessive voltage level and power quality, etc.

Inactive Publication Date: 2017-10-24
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Power grids in areas with high penetration of new energy are facing a series of problems, including: voltage levels and power quality exceeding standards, rapid changes in different operating modes cause partial power flow reversal, and bring hidden dangers to the safe operation of the power grid

Method used

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  • New energy power station voltage control system and method based on inverter phasing operation
  • New energy power station voltage control system and method based on inverter phasing operation
  • New energy power station voltage control system and method based on inverter phasing operation

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Embodiment 1

[0081] The embodiment of the present invention proposes a new energy power plant voltage control system based on inverter phase modulation operation. Through the interaction with the dispatching master station and the new energy plant station, the voltage of the grid-connected point of the new energy power plant is used as the control target to fully tap the potential of the new energy power plant. The reactive power phase modulation capability of the inverter can control multiple new energy power plants at the same time. Since the regional power grid model is large, the control area model of the new energy power plant is small. The topology calculation is performed by the regional power grid model, so as to realize the new energy power plant group and the regional power grid. The globalized reactive power coordinated control of the system, specifically:

[0082] Such as Figure 1-2 As shown, a new energy power station voltage control system based on inverter phase modulation ...

Embodiment 2

[0115] Such as Figure 3-4 As shown, a new energy power station voltage control method based on inverter phase modulation operation, including:

[0116] (1) The new energy AVC control master station reads the required power grid model data (that is, the regional power grid model) and the measurement information in the real-time database from the dispatch master station, and analyzes and topologically analyzes the power grid model data to generate the control area Power grid calculation model matrix; the control area is each controlled new energy plant station, in this embodiment, the new energy plant station is a photovoltaic power plant;

[0117] The grid model data is preferably a QS file of a time section, and the grid calculation model matrix includes voltage reference values, busbars, lines, generators, transformers, transformer windings, loads, capacitors, reactors, circuit breakers, knife switches, etc. information.

[0118] The specific process for the new energy AVC...

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Abstract

The invention discloses a new energy power station voltage control system and method based on inverter phasing operation. The new energy power station voltage control system takes the new energy power plant grid connection point voltage as the control object, interacts with a scheduling master station and a new energy plant station, receives a power grid data model sent by the scheduling master station and measurement information in a real-time database, and carries out topology in dependence on the power grid data model in the scheduling master station, and generates a power grid calculating model matrix of a control area, carries out reactive power optimization calculation on the power grid calculating model of the control area by means of an optimal power flow integrated algorithm, gives out a voltage / reactive power control object value of the control node, and achieves reactive power / voltage adjustment of a new energy plant station inverter. According to the invention, global reactive power coordinated control of a new energy power station group and a regional power grid system can be achieved, the reactive power optimization capability and the voltage control capability of the regional power grid system are improved, and demands on high-quality electric energy supply can be satisfied.

Description

technical field [0001] The invention belongs to the field of power system safety control, and in particular relates to a new energy power station voltage control system and method based on inverter phase modulation operation. Background technique [0002] With the development of energy interconnection technology and the continuous advancement of new energy policies, large-scale new energy power generation is connected to the grid, and the penetration rate of new energy access in the region continues to increase. Power grids in areas with high penetration of new energy are facing a series of problems, including: voltage levels and power quality exceeding standards, rapid changes in different operating modes cause local power reverse, and bring hidden dangers to safe operation of the power grid. Excavate the adjustable capacity of the inverter of the new energy power station in the regional power grid, perform phase modulation operation on the inverter, participate in the reac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/18H02J3/16
CPCH02J3/16H02J3/18H02J3/383Y02E10/56Y02E40/30
Inventor 袁宇波李虎成张小易聂国际吕振华彭志强樊海锋马春生
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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