Small hydroelectric active-reactive power control device based on internet-of-things chip wireless communication module

Abstract

The invention discloses a small hydroelectric active-reactive power control device based on an internet-of-things chip wireless communication module. The control device comprises a small hydroelectricactive-reactive power control unit; a switching quantity input module, a switching quantity output module, an analog quantity input module are connected with the small hydroelectric active-reactive power control unit by wires. The small hydroelectric active-reactive power control unit is connected with a communication unit based on a built-in e-SIM card internet-of-things chip wireless communication module by a wire. Therefore, problems that the grid can not monitor the running state and load information and small hydropower stations can not be controlled rapidly because the existing small hydropower active-reactive power control system employs the communication mode using the 4G or GPRS wireless public network for data transmission are solved. When the 4G or GPRS wireless public networkis employed for data transmission, problems of stealing of the mobile entity SIM card, low regulatory efficiency, large product size, and poor communication reliability and stability of data transmission based on teh wireless public network are caused.

Description

technical field [0001] The invention belongs to the technical field of automatic control of active distribution networks, and in particular relates to a small hydropower active and reactive power control device based on an Internet of Things chip wireless communication module. Background technique [0002] As a clean, non-polluting, renewable and green energy with good ecological and social benefits, the importance of small hydropower has become increasingly prominent. The development of small hydropower can drive local economic and social development, alleviate the phenomenon of power shortage in distribution networks, improve production and living conditions, and at the same time promote energy conservation and emission reduction, and promote the construction of green power grids. The development of small hydropower in China has reached a considerable scale, especially after the country put forward the requirements of energy saving, emission reduction and green scientific ...

AI Technical Summary

Problems solved by technology

[0003] However, the connection of a large number of small hydropower to the power grid makes the power flow of the lines in the power grid no longer a unidirectional flow, which also has a great impact on the structure and operation of the entire regional power grid system

With the access of small hydropower, the distribution of active power and reactive power in the distribution network will fluctuate with the different rainfall in each season and the power generation of small hydropower. Regulation presents great challenges

[0004] The voltage problem of the small hydropower distribution network is mainly reflected in the following: in the dry season and when the load is high, the power generated by the small hydropower in the distribution network cannot fully supply the local load, so the main network needs to transmit part of the power to the distribution network, and the electric energy is from The main network transmits and consumes to the distribution network, and the voltage along the distribution network gradually decreases, which may cause the voltage at the end of the line to be too low; during the wet season and the power load is low, the power generation of small hydropower is high, and part of the electric energy will be small Hydropower is transmitted to the main grid. In the distribution network rich in small hydropower, it may increase the voltage along the distribution network, and even cause the terminal voltage to exceed the limit.

At the same time, the unpredictability and uncontrollability of the output of small hydropower units lead to fluctuations in the active power of the grid, which causes large fluctuations in the frequency of the grid

[0005] Since most of the distributed hydropower is located in remote mountainous areas, the current mainstream power communication means are difficult to cover. At present, except for some small hydropower stations, which can realize the communication function through the dispatching data network and the dispatching terminal, most of them still use 4G or GPRS wireless public network to transmit data. , there are problems such as theft of mobile physical SIM cards, low supervision efficiency, large product size, poor communication reliability and stability of wireless public network network transmission data, etc.

Moreover, since most of the small hydropower stations are located in areas with weak power grids or remote areas, and the operating environment conditions are poor, 4G or GPRS wireless public network communication methods cannot be used to transmit data, and the power grid cannot monitor information such as its operating status and load, and cannot control Rapid control of small hydropower and other issues

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