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An optimization method for solving photovoltaic access point voltage deviation

An optimization method, a technology of voltage deviation, applied in photovoltaic power generation, electrical components, circuit devices, etc.

Active Publication Date: 2020-10-23
ECONOMIC TECH RES INST OF STATE GRID ANHUI ELECTRIC POWER +9
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, different pressure regulation methods have different investment costs and operating costs.

Method used

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  • An optimization method for solving photovoltaic access point voltage deviation
  • An optimization method for solving photovoltaic access point voltage deviation
  • An optimization method for solving photovoltaic access point voltage deviation

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Embodiment Construction

[0054] According to the requirements in the "Technical Regulations on Connecting Distributed Power to the Grid", when the distributed photovoltaic power is connected to the grid, the voltage deviation range of the public node must meet the requirements of the "Power Quality Supply Voltage Allowable Deviation" (GB / T12325—2008), that is : 35kV and above, the sum of the absolute value of the node voltage positive and negative deviation ranges should be less than or equal to 10% of the nominal voltage, and the three-phase node voltage deviation range of 10kV and below is between -7% and +7%; 220V single-phase Node voltage deviation ranges from -10% to +7%.

[0055] The equivalent circuit of the photovoltaic power generation system connected to the distribution network is as follows: figure 1 shown.

[0056] figure 1 The two nodes in the middle refer to the grid-connected common node of the photovoltaic system and the busbar node of the distribution network, and their voltages ar...

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Abstract

The invention discloses an optimization method for overcoming voltage deviation of a photovoltaic access point, and research is conducted on distribution characters of distributed photovoltaic power in different zones; a distributed photovoltaic power generation model, a load model and a primary network topology structure are built; laws of voltage deviation of a photovoltaic power source access point from aspects of space, time and different voltage grades; internal connection between voltage deviation and distribution characters of a distributed photovoltaic power source is discussed respectively in different power foldback scenes. According to the method, a technical solution is put forward while safe and stable operation of a power grid and a power station is ensured and technology regulations and standards are met; the technical solution comprises installation of an on-load voltage regulation device for a power distribution network voltage transformer, transformation of a primary power grid structure, adjustment of active and reactive output of a photovoltaic inverter and installation of a reactive compensation device and an energy storage device. Based on voltage deviation laws and photovoltaic power foldback scenes, an optimal solution for voltage deviation can be put forward from technical and economic angles.

Description

Technical field: [0001] The invention belongs to the technical field of power system scheduling automation, and in particular relates to an optimization method for solving the voltage deviation problem of photovoltaic access points. Background technique: [0002] With the improvement of residents' living consumption level and the acceleration of building a resource-saving and environment-friendly society, the new urbanization development path will inevitably have stricter requirements for environmental protection. Under the dual pressure of resources and the environment, the development of new energy power generation is of great significance to optimize the energy structure, protect the ecological environment and promote sustainable economic and social development. The rapid development of new energy also poses a challenge to the safe operation of the power grid. Due to the unevenness, randomness, volatility, and intermittent nature of solar radiation changes, the output po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/06H02J3/38
CPCG06Q50/06H02J3/383H02J2203/20Y02E10/56
Inventor 葛斐叶斌王绪利代磊胡斌任曦骏赵锋蔡壮范征
Owner ECONOMIC TECH RES INST OF STATE GRID ANHUI ELECTRIC POWER
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