JPS58179129A - Backup control system for power system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention is centrally controlled! Device C2 has a number of terminal control devices 'IFL' connected via the transmission device, and controls the voltage and reactive power of the power system.When the transmission device in system C2 fails, the terminal control device The backup control method C executed by

Conventionally, there have been the following backup control methods of this type. Figure 1: Smell system, 1: central control unit,
This is a terminal control device located along bus line C of the 2Fi power system. When the detected electric current is detected, the transmission device and transmission line shown in the figure are connected from the terminal system 1iai to the central control unit 1 and vice versa as shown by the arrows. It is transmitted via τ.

FIG. 2 is a connection diagram showing the connection relationship between the terminal control device 2 and the power system to be controlled. 3 busbar of power system with voltage v1'ft, 4 busbar 3 t = post connection n, voltage ■ transformer that transforms 1 to voltage v2, 5 bus through transformer 4!
The voltage connected to I3 is the 2nd bus, and the 6th is connected to the 5th bus! 19 capacitors, 7 reactors connected to bus 5.

Next (2. Explain the operation. Name terminal control device 2tj
Active power P and reactive power Qft are detected from the bus 5 and transmitted to the central control IIge device 1. The central control device 1 receives the fc active power P and reactive power Q from the terminal control device 2Xll as data, performs processing according to a program for optimally controlling the engineering power system, and outputs a target value. t
1 is transmitted to the terminal control device 2.

From this, the terminal control device 2 receives the target value of n and 1, controls the on and off of capacitors 6 and 7, and turns on and off the tap of transformer 4. Control the lowering.

FIG. 3 is a control pattern diagram explaining the operation of the terminal control device. In the figure, it is an SC recondenser f6.5 Rii reactor torque, LRTd transformer 4. Also, ΔV' voltage deviation, target value of voltage v2 of V island bus 5, Δ■o voltage deviation jVδ correction width, ΔQ' deviation of reactive power Q, Qo's target value of reactive power Q, ΔQ0 rr@ for Ill bond Q
The width is Δv′=v2−(v2′±jV′) ΔQ′=Q−(Q′−Δci).

During this kind of force control, if a failure occurs in the transmission function between the central control device 1 and some terminal control devices 2, for example, if a failure occurs in the transmission function between the central control device 1 and some of the terminal control devices 2, the terminal control device of the core 2.I was having a hard time receiving the target values ■2° and Q from the central control unit 1, so I prepared in advance J2p and stored 081 V2. Using Q, control continues with the required 1i111 pattern.

The backup control system in the United States was configured as described above, so if the negative voltage connected to the bus line suddenly rises, control pattern 1 prepared in advance is activated.
l11i1'''C I can deal with it.The precision and followability of mi control was poor and I had to miss classes.

This invention utilizes the above techniques to eliminate the time-consuming process of conventional methods (for example, in the past week, target 1-patterns received from the central controller are As a reminder, when a failure occurs where the current target field pattern cannot be obtained, for example, read out the past target value pattern that corresponds to that day, and find the target that is closest to the control pattern for that day. The present invention aims to provide a highly accurate backup control method by selecting a target value pattern and continuing τ control in accordance with the selected target value pattern.

Hereinafter, an embodiment of the present invention will be explained with reference to FIG. 4. In FIG.
This is an external storage device that receives the target values 2° and Qo sent from the central control device 1 via the terminal control device 2 and continuously stores them for one week. Other parts are the same.
It is the same as in FIGS. 1 and 2, as indicated by the strokes.

Next, the operation will be explained. When the whole device is operating normally, the terminal system (Ill device 2 detects pressure v2 and reactive power QU is transmitted to the central control device 1. In order to perform optimal control over the entire system, the target value V2° + Q' is transmitted to the terminal control device 2.The terminal control device 2d transmits the received target i1 V2' tQ for the most recent week to the outside. It is sent to the storage device 8 to be stored, and the detected voltage v2 is
and reactive power Q and (n) are compared, voltage deviation j V' and reactive power deviation j Q' are detected, and these n are the allowable width ΔV
and ΔQ, and when the capacitor 2, the reactor torque is turned on or off (2), and the tap of the transformer 4 is raised or lowered, the control pattern C as shown in FIG. 3 is followed. C-actual execution.

Here, there is a central control device 1 and a terminal control device 2 and a central control device! l A failure occurs in the transmission function between device 1 and the central control l]g! A field where transmission with 1 is impossible.

In addition, the terminal control device 2 and the external storage device 8η) are stored χ
Read out the eye lI1gIV2゜ and Qo for the past week, select the one closest to the control pattern of the current day, and select the control pattern according to the control pattern shown in Figure 3 (= flrljj
ilt sequel.

Continuing the above, according to the present invention, the terminal control device continuously stores nχ rice messages sent from the central control device 1 in a sieve sequence for one week, and when the central control device If you are unable to receive current information, read out the past week's worth of stored information, select the pattern closest to that day, and then control the power system. This has the advantage of increasing the accuracy of backup control.

[Brief explanation of drawings]

Figure 1 is a block diagram of the backup control system, Figure 2 is a connection diagram of the terminal-based fa device in the conventional backup control method C, Figure 3 is a control pattern diagram of the operation of the terminal-based till device, and Figure 4 -Backup side leg method according to the fruitful example of this invention! It is a connection diagram of the terminal 1+j tll device. 1... Central control TL equipment, 2... Terminal mJa device,
3, 5...Bus bar, 5...Transformer, 8...lA section storage device. In the figures, the same symbols indicate the same parts. Agent Shin Tameno - (#l is one person) 111 Figure 2

Claims (1)

[Claims] A number of terminal control devices are arranged along the busbar of the power system to detect electrical sound from the busbar and control the amount of electricity so that it follows a predetermined target value pattern, and a transmission line is connected to the terminal device. The electricity 1 is received from each terminal control device and the target price pattern is generated by the operation process of τ to optimally control the power system and transmitted to the terminal control device. and an external storage unit connected to the terminal-controlled plant to continuously store the above-mentioned target. When the target value is injured and forcefully applied, the target value stored in the external storage device is read out, and the target control pattern (the one closest to the target value pattern is selected). A power system backup control method that recognizes the control of the above-mentioned buses according to a target value pattern.