Power distribution network voltage regulation and reactive compensation whole-network coordination control method and device

Abstract

The invention discloses a power distribution network voltage regulation and reactive compensation whole-network coordination control method and device. The method includes: collecting real-time operation data of each monitoring point of a power distribution network and gauge electric quantity data; performing topology analysis on the power distribution network, and dividing subnetworks; on the basis of the collected data, analyzing flexibility of transmission loss to reactiveness, and determining to-be-input or remove control reactive compensation equipment; on the basis of the collected data, analyzing flexibility of node voltage to subnetwork threshold voltage, and determining to-be-regulated voltage regulation equipment; issuing control instructions to the reactive compensation equipment and the voltage regulation equipment. By the method, power distribution network voltage regulation and reactive compensation coordination control effects can be increased effectively.

Description

technical field [0001] The invention relates to the field of control technology, in particular to a method and device for voltage adjustment of a distribution network and reactive power compensation for the coordinated control of the entire network. Background technique [0002] Voltage is an important indicator of power quality. Voltage quality has an important impact on the safe and economical operation of the power system, on ensuring the safety of users in production and product quality, as well as the safety and life of electrical equipment; and the reactive power compensation and reactive power balance of the power system It is the basic condition to ensure voltage quality. Effective control and reasonable reactive power compensation can not only ensure voltage quality, but also improve the stability and safety of power system operation, reduce power loss, and give full play to economic benefits. [0003] Traditional voltage and reactive power control is mostly local a...

AI Technical Summary

Problems solved by technology

[0010] 1. Since the current level of automation and intelligence of the distribution network is far lower than that of the transmission network, the proportion of monitoring points and controllable points is low, and the control action has a wide range of influences, so it is impossible to know the operation status of the non-monitoring equipment after the action of the controllable equipment. impact, which can only be guaranteed by limits or action budgets

[0011] 2. Voltage control cannot be realized at the low-voltage user end, and the purpose of improving low-voltage user voltage can only be achieved by adjusting the upper-level distribution transformer, line voltage regulator or bus voltage

[0012] 3. Since the operation of the equipment is based on the operation status of the upper and lower power grid equipment in addition to the local monitoring quantity, it is easy to cause the vibration of the equipment action

[0013] 4. The direct-facing users change frequently, and the fluctuation of user load presents greater randomness, making short-term and ultra-short-term load forecasting more difficult

[0014] To sum up, the current optimization methods layer the target, generally take voltage as the control object, and do not take into account the network loss and the number of actions of the control equipment, and the upper-level control often does not consider the lower-level control when modifying the lower-level settings. Limits and responsiveness are allowed, so the result does not necessarily meet the limit of the least number of equipment actions, nor does it represent economical reactive power optimization, resulting in poor effects of distribution network voltage adjustment and reactive power compensation coordinated control

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