Formula based programmable voltage wattless automatic control device

Abstract

This invention discloses a programmable voltage passive automatic control device based on formula including a VQC control unit exchanging data with a formula operation unit by a real time database to obtain and output control orders, an output-control interface connected with controlled objects, a formula operation unit exchanging data with VQC control unit by a real-time database, a real-time database composed of series of memories, providing all data necessary for operation and providing required information to VQC control unit and a formula operation unit, and collecting data of controlled objects to comprise a database with multiple information and a data source of the system.

Description

technical field [0001] The invention belongs to the automatic control technology of the electric power system, more specifically relates to the voltage control technology in the electric power system, especially relates to the voltage reactive power automatic control (VQC) device. Background technique [0002] As one of the automatic control technologies of power system, voltage and reactive power automatic control (VQC) plays an important role in ensuring the balance of substation bus voltage and reactive power. The target bus voltage and power factor are controlled within the set range. [0003] The design of voltage and reactive power automatic control devices has been developing towards flexibility, stability and accuracy, and the control strategy is its core component. "Research on Voltage and Reactive Power System", Electric Power System Automation, 1995, No. 7] and "Computer-based Voltage and Reactive Power Integrated Controller" edited by Yang Rengang, Yang Minghao,...

AI Technical Summary

Problems solved by technology

[0005] 1. The strategy is fixed, which is not conducive to later expansion

[0006] The original VQC device has a simple design and a single strategy. It only provides classic nine-zone control. All control and locking are carried out in solidified logic. Users only need to set simple upper and lower limit values ​​to perform VQC control. The disadvantage of this control is that the user does not have any right to choose a strategy, and the strategy is simple, unable to cope with various complex on-site situations, and the control effect is poor; the blocking condition does not have the ability to expand later, and only enough blocking can be fully considered in the design Situation and related design, if expansion is really needed, then program modification must be considered

[0007] Existing VQC devices have gotten rid of the original single-strategy mode and started to develop towards an integrated mode. Generally, several common control strategies are provided in the system, and users can make appropriate choices according to their needs, but the flexibility of this choice It is still limited, and the commonly used control strategies cannot be applied to all situations. For example, in some special engineering sites, it is hoped that the boundaries of the nine areas can be dynamically changed according to different site conditions, and the action strategies of each area can be customized

In the face of users with special needs like this, the flexibility of the VQC device in the integrated mode also loses its effect, and the special needs of users can only be met by changing the program. This system tailored for special users loses The standard of generality is not met, but it also consumes a lot of manpower and material resources, which delays the progress of the project

[0008] 2. No simulation function

Moreover, only the current system state is displayed on the nine-zone map, and there is no memory function for the system state before the control order is issued. This kind of simulation process has cumbersome steps, and it is not easy to observe and understand the entire control process.

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