On-line monitoring allowable intelligent high voltage reactive power compensation device

Abstract

The invention discloses an on-line monitoring allowable high voltage reactive power compensation system and method. The system comprises a background server, at least one electric power comprehensive measuring and controlling instrument and a wireless communication unit, the background server is connected with the electric power comprehensive measuring and controlling instrument through the wireless communication unit, and the background server acquires measured data transmitted by the electric power comprehensive measuring and controlling instrument. According to the system and the method, a wireless communication technology is applied to a 10 / 6KV power distribution network reactive power compensation device, devices distributed across the country can be real-timely monitored, and data of the devices can be acquired; and the reactive power flow analysis is applied to the 10 / 6KV power distribution network reactive power compensation device, the problems of frequently switching capacitors and upwards and inversely feeding reactive power in terms of existing compensation devices are radically solved, the reactive current can be compensated on site in the system, and the optimization of the reactive power flow is guaranteed.

Description

technical field [0001] The invention relates to a power system device, in particular to a high-voltage reactive power compensation device capable of on-line monitoring. Background technique [0002] Due to the continuous increase in demand for electricity due to the development of society, power users have put forward higher requirements for power companies. On the one hand, they must ensure the safety and reliability of the power grid itself, and reduce reactive power loss as much as possible to improve the economy of power grid operation; On the other hand, it meets the user's requirements for high-quality electric energy. The existence of this contradiction will inevitably require the introduction of new technologies to improve power quality and improve the intelligence level of the grid itself. Power system reactive power optimization is an important measure to ensure system security, stability, economy, reduce network active power loss, and improve power quality. [0...

AI Technical Summary

Problems solved by technology

[0004] (1) The existing protection device lacks real-time monitoring of the operating state of the capacitor, as well as the recording function of the switching process of the capacitor bank and the fault tripping process, so that the analysis of the operating state of the capacitor device, especially the cause of the accident of the capacitor device Analytical research lacks basic basis

[0005] (2) Cannot achieve the global optimum: the current automatic compensation methods are all calculated for the sampling point data, because there is a lack of communication between the controllers, the algorithm used is backward, and the controller cannot integrate the operation of the entire network, which is the distribution trend of the reactive power flow. It is the most reasonable, the economic benefits are the best, and there is a phenomenon of reactive power being sent back to the distribution network. At the same time, it cannot realize the remote measurement of the power grid, which is not suitable for the development trend of the modern power grid.

[0006] (3) The anti-interference ability of the controller is poor: because the working environment of the controller has high current, strong magnetic field, etc., there are often malfunctions or crashes, and it is not suitable (or unable) to work in a system with harmonics. The function of the controller is relatively simple, which cannot meet the control requirements of the advanced compensation system (requires multiple protection functions)

[0007] (4) The production of complete sets of devices generally uses separate components and devices, the internal structure of the cabinet is complex, and the assembly process is difficult

[0008] (5) Since the components are purchased from different manufacturers, the quality of the components is uneven, and the parameter coordination (matching) between various components is inaccurate or unreasonable, resulting in unreliable operation of the compensation equipment and a high failure rate. high

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