A Reactive Power and Voltage Control System for Regional Power Grid

Abstract

The invention provides a regional power grid reactive voltage control system used for an external SCADA system. The regional power grid reactive voltage control system comprises a topological network establishment module, a data acquisition and analysis module, a reactive voltage analysis module and a control output module. The topological network establishment module is used for establishing a power grid topological network according to a power grid model; the data acquisition and analysis module is connected with the topological network establishment module and used for acquiring power grid real-time data through the SCADA system according to the power grid topological network; the reactive voltage analysis module is connected with the topological network establishment module and the data acquisition and analysis module and used for analyzing effective real-time data to generate a power grid remote control instruction; the control output module is connected with the reactive voltage analysis module and used for sending the power grid remote control instruction to the SCADA system. According to the regional power grid reactive voltage control system, reactive voltage control of a regional power grid and the minimum power loss of the whole power grid can be achieved.

Description

technical field [0001] The invention relates to the technical field of electric power automation, in particular to a reactive voltage control system of a regional power grid. Background technique [0002] The stability of voltage can ensure the normal operation of various electrical equipment and prolong its service life. With the increasing requirements of users for power supply quality, the voltage qualification rate has become a major concern for them. For economic considerations, reactive power cannot be transmitted over long distances in the power grid, so as to avoid energy loss caused by long-distance transmission of reactive power. At the same time, voltage and reactive power control is a problem related to ensuring the quality of power supply, meeting user reactive power requirements and system voltage compliance, and is also an effective measure to reduce network loss and improve the economy of power grid operation. Closely. Therefore, realizing the optimal contr...

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Problems solved by technology

This kind of substation-level voltage and reactive power local optimization comprehensive control technology is relatively mature, but there are still the following deficiencies: 1. Only local optimization can be realized, and the optimal control of the whole system cannot be realized, and only the controlled bus voltage can be guaranteed. Qualified, can not achieve the goal of the minimum power loss of the whole network; 2. Frequent voltage adjustments will occur in the secondary on-load voltage regulation grid, which will easily cause unreasonable voltage regulation, and the ability to adjust the mid-terminal voltage of the three-winding transformer is insufficient; 3. , The regulation and control of the VQC device is based on the given upper and lower limits of voltage and reactive power. The determination of the upper and lower limits of voltage and reactive power depends on the experience of maintenance personnel. There is a lack of an effective calculation method. If the upper and lower limits are unreasonable, No matter how perfect the adjustment measures are, it is impossible to get reasonable control; Fourth, each substation needs to invest in VQC devices, which will also increase the equipment investment of power supply companies

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