Dynamic voltage regulation control method under distributed photovoltaic-cluster non-communication condition

A distributed photovoltaic and control method technology, applied in reactive power compensation, AC network voltage adjustment, AC network with the same frequency from different sources, etc., can solve problems such as system reliability reduction, system global collapse, and dependence on communication

Active Publication Date: 2017-10-24
TSINGHUA UNIV
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Problems solved by technology

However, due to the large number of power generation nodes of the distributed photovoltaic power generation cluster and the scattered geographical distribution, the traditional control method needs to build a complex communication network, making the operation of the system heavily dependent on communication
Once the communication fails, the system will face the risk of a global c

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  • Dynamic voltage regulation control method under distributed photovoltaic-cluster non-communication condition
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  • Dynamic voltage regulation control method under distributed photovoltaic-cluster non-communication condition

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[0055] The dynamic voltage regulation control method for distributed photovoltaic clusters without communication provided by the present invention includes the following steps:

[0056] 1) Establish a distributed photovoltaic cluster voltage optimization model, the expression is as follows:

[0057]

[0058] Where V is the vector composed of the voltage amplitudes of all nodes except the root node in the distributed photovoltaic cluster; μ is the vector composed of the ideal voltage amplitudes of all nodes except the root node, generally taken as a vector composed of all ones; q g Is the vector composed of the photovoltaic reactive power injection value of each node in the distributed photovoltaic cluster, C is the weight c i Diagonal matrix formed, c i Is the distributed photovoltaic reactive power adjustment cost coefficient of node i, which is determined by the construction and operation costs of the distributed photovoltaic equipment itself. In general, it can be taken as 1, q i ...

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Abstract

The invention provides a dynamic voltage regulation control method under a distributed photovoltaic-cluster non-communication condition and belongs to the electric power system operation and control technology field. The method comprises the following steps of establishing a distributed photovoltaic cluster voltage optimization model and a branch trend equation of a distributed photovoltaic cluster respectively, and carrying out linearization on the branch trend equation so as to obtain the branch trend equation of distributed photovoltaic cluster linearization, and converting to a matrix branch trend equation; after solving a matrix equation, converting the optimization model so as to acquire an approximate optimization model; using a distributed quasi-Newton method to solve the approximate optimization model; based on an iterative result, carrying out reactive power control on each node in the distributed photovoltaic cluster and determining whether iteration converges; and if the iteration converges, ending voltage control of the distributed photovoltaic cluster. By using the method, a reactive power regulation capability of distributed photovoltaic power generating nodes is fully used, construction of a communication system is avoided, a calculating burden of the system is mitigated and operation and maintenance cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control, and in particular relates to a dynamic voltage regulation control method under the condition of no communication of distributed photovoltaic clusters. Background technique [0002] With the increasing attention to environmental pollution and the comprehensive advancement of smart grid construction, the installed capacity of renewable energy power generation and grid-connected power generation continue to increase, and the time-varying and complex problems of grid operation have become increasingly prominent, greatly increasing the power grid operating risks and control difficulties. In recent years, the state has issued a series of policy documents to vigorously support the promotion and application of distributed resources, and the State Grid Corporation of China has also issued "Opinions on Doing a Good Job of Grid-connected Services for Distributed Power". Distribut...

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Application Information

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IPC IPC(8): H02J3/16H02J3/06
CPCH02J3/06H02J3/16H02J2203/20Y02E40/30
Inventor 吴文传张伯明孙宏斌王中冠刘昊天郭庆来王彬
Owner TSINGHUA UNIV
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