An active distribution network control strategy and method

Abstract

The invention discloses an active power distribution network control strategy and method. The method includes the following steps that firstly, all circuits and distributed power source information are initialized; secondly, t is equal to zero, and initial load flow calculation preparation is conducted; thirdly, the changes of P and Q are compared, whether load changes exist or not is judged; fourthly, normal operation is conducted, and adjustment is not made; fifthly, primary adjustment of a system is conducted; sixthly, secondary adjustment of the system is conducted; seventhly, frequency control is conducted; eighthly, voltage control is conducted; ninthly, active output and reactive output are adjusted, and the offset is adjusted; tenthly, a new round of load flow calculation is prepared. According to the active power distribution network control strategy and method, global optimization can be achieved only with the communication of local information, the control efficiency is improved, and the control cost is reduced; due to the layered control over an active power distribution network, the logic and the function of protection can be verified more comprehensively, more efficiently and faster, the functions of control and protection are fully developed, the safe and reliable operation of a power grid is ensured, the debugging manpower and the debugging material resources are greatly saved, the production cost is lowered, and industrialization, application and popularization in the future are facilitated.

Description

technical field [0001] The invention relates to the application field of an active distribution network of a power system, in particular to an active distribution network control strategy and method. Background technique [0002] Active distribution network (ADN) is a system composed of micro-power sources, loads, energy storage systems and control devices. It is a single controllable unit for the large power grid, which can realize the highly reliable supply of multiple energy forms for the load. There are two main characteristics of the active distribution network: one is that it contains local power generation devices, mostly distributed power sources with small capacity. Distributed Generation Resource (DGR) usually refers to mainly using renewable new energy and generating power It is a small modular, environment-compatible independent power supply from a few kW to 50MW, which can meet the specific requirements of the power system and users. The second is that the act...

AI Technical Summary

Problems solved by technology

[0007] The active distribution network is layered on the communication network, and the communication topology network is divided into the main communication network and the sub-communication network; The network composed of the original distributed power sources of the power grid is used as the main communication network, and the distributed power sources in the main network and the newly added power sources nearby are used as sub-networks; the main communication network and the sub-communication network exchange information through their shared power sources , claiming that the power supply is called the access point of the sub-communication network, setting the power supply on the access point of the sub-communication network as the main power supply of the sub-communication network; making the access point of the sub-communication network not the main power supply of the main communication network; (so the sub-communication network The network access point has two characteristics: (1) the slave power supply of the main communication network; (2) the main power supply of the sub-communication network; the classification of all distributed power sources in the active distribution network according to the present invention is as follows in Table 1;

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