JPS59136822A - Voltage-reactive power control system - Google Patents

Abstract

PURPOSE:To ensure the following even to the frequent actions carried out to the variation of the system conditions and the load by selecting a controller after deciding whether are deviation between the system voltage and the reactive voltage which is generated by the variation of the back voltage at the system side. CONSTITUTION:Both the system voltage and the reactive power of systems 1-3 are measured by a CPU76 via input signal converters 71-75 of a voltage-reactive power controller 7. The CPU76 identifies the initial value from said measured value as well as the system reactance from the initial value and its variation. Then the CPU76 decides whether the deviation between the system voltage and the reactive power which is due to the variation of the system back voltage satisfies a specific function relation decided by the prescribed system voltage, the blind sector width of the reactive power and reactance respectively. Based on this decision, the CPU76 selects a tap switch 41 or a breaker 51 for shunt reactor and a breaker 61 for static capacitor via output signal converters 77-79. These controllers are sequentially operated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a voltage-reactive power control method 4CtA that can achieve frequent operation and sufficient adjustment function in response to fluctuations in system conditions or load fluctuations in a busy power transmission system.

Due to the increase and diversification of electricity use, social demands for a stable supply of electricity are becoming increasingly strong.

On the other hand, with the expansion of the power system, the location and location of power supply equipment, uneven distribution of power sources, large rutted transmission lines, and longer distances, problems are arising regarding system voltage for stable operation of the system.

As a result, it has become desirable to improve the functionality of the system's voltage and reactive power consumption.

System voltage-reactive power control is to control voltage adjustment and reactive power adjustment equipment to maintain the reference voltage of the system and adjust the system voltage.

In modern power systems, more than 90% of the total number of on-load tap-changing transformers for voltage regulation are on-load tap-changing transformers, and the capacity of static capacitors and shunt reactors for reactive power regulation is close to lθ% of the transformer's approved capacity. are doing.

The pressure-reactive power control and adjustment methods that are widely used in systems using electrodynamic adjustment devices can be roughly divided into the following two control and adjustment methods.

(1) Individual control method A method of individually controlling the 1-voltage/reactive force adjusting equipment at each electric station so that each electric station maintains a predetermined reference value.

(II) #: Is it possible to centrally centralize online information such as voltage and power flow at monitoring points installed at key points in the joint control system? A method to control and adjust the voltage-reactive force adjusting device by issuing one contact operation command from the electronic meter *+i at the qf location to the individual control system at each location.

Although the above two methods have been implemented in combination or alone, the present invention examines the above individual control methods and attempts to improve the characteristics of expanding their application.

Before entering into a detailed description of the present invention, the individual control system that has been used in the United States will be explained.

Figure 1 shows the configuration of the individual control system.

In Figure 1, 0 is the transformer that connects the upper and lower power systems, 1 is the transmission line of the upper system connected by the transformer OK, and 2 is the transmission line of the lower system (Iwao). , 6 are the transmission (distribution) wires of the lower system from the power transmitter 2. 4 is the on-load tap changer and winding for the transformer Ok, and 41 is the control device for the switch IvMl ( Hereinafter, it is abbreviated as LRA (f).

Same (In Fig. 1, 5 is the shunt reactor connected to the lower system 6, 51 is the shear breaker for closing 1'A, and the shear breaker for the immediate shunt reactor (hereinafter abbreviated as CB). 6 is a similar static capacitor, 61 is its switching breaker,
That is, it is a star converter 1lfT device (hereinafter abbreviated as CB).

Furthermore, 7 is a voltage-ineffective one-force control cape structure, and is the above-mentioned control device 41, or a shutoff switch 51, and a shutoff @7! Upgrade to s61,
Gives a signal to lower or open/close.

On the other hand, 11, 12, 21.22, 31.52 are voltages, ″(
The transformer PT transforms the current, the CT transformer (hereinafter referred to as PT) 11, 21.31 transforms the voltage of each system 1, 2.3, respectively, PT (D), the current transformer (Hereinafter, C
(referred to as T) 12, 22.52 are CTs that transform the currents of systems 1 and 2.3, respectively.

The operation of the busy individual control method will be explained.

First, the voltage V of the mother @ 20 whose voltage should be maintained is set to a voltage-reactive power control device (hereinafter abbreviated as VQC device) by 7JfC, and in addition to this, the voltage and current of the upper system are additionally introduced.
From these amounts, set V and Q to the needle side.

Calculate the difference ΔV and ΔQ from the reference voltage v0 and reference reactive power that are given in advance to be maintained, and determine in VQC whether or not iV and ΔQ satisfy a predetermined relationship, and perform LRA.
41. CB51 for shunt reactor, C for stancon
It issues commands to raise/lower or open/close the B61.

Judgment as to whether these measured values of ΔV-ΔQ satisfy a predetermined relationship is made by detecting whether they fall within the range of a simple standard 1 box given in advance to the VQC device @7. This standard is often a constant shift determined by taking a macroscopic view of the daily fluctuation model of the system load (in some cases, it is a fixed shift based on a macro model of the time-series fluctuation of the system load). Some have been changed to .

However, the suppression target value of ΔV-ΔQ should change due to changes in system conditions and load fluctuations, so if this value is operated as a constant value, frequent operation of the voltage-reactive power adjustment equipment and the inability to make adjustments may occur. There is a possibility that this may occur. In order to avoid this, some methods have a time delay effect (integral action) in the judgment of ΔV-ΔQ, but even if malfunctions due to temporary fluctuations can be prevented, continuous fluctuations or wide fluctuations in system conditions may occur. However, it is difficult to say that it is effective against load changes.

The present invention has been made in order to provide a control method that eliminates these drawbacks, and is capable of following frequent operations in response to changes in system conditions or load fluctuations in the power transmission system, and has a sufficient control system. It is an object of the present invention to provide a voltage-reactive power control method that can achieve A-adjustment function.

Hereinafter, the principle and practical examples of the present invention will be explained with reference to the drawings.

First, the principle of the present invention will be explained with reference to the drawings in 111 for detailed explanation of the present invention.

FIG. 2 shows a voltage/reactive power adjustment model system that is the subject of investigation according to the present invention.

That is, the power source is connected to the upper system 1 via the reactance Xl, and the load (or power source) is connected to the lower system 2 via the reactance x2.

The transformer 0 is equipped with a tongue switch n, and the turns ratio n is In
In addition, the tertiary winding of the transformer 00 has a phase adjusting facility, and reactive power 9 can be supplied, and the amount of change is Δ9.

The snow pressure at bus line 20 that should be adjusted as the current target is V.

Let Q be the reactive power flowing from the upper system to the lower system 2.

・・・・・・3・l ・・・・・・3・2 Here Δ■1; Variation Δ of ttigt pressure η of upper system 1
v! : The relationship of the variation in the back voltage V of the lower system 2 is established.

Assuming that there is no tap adjustment of the transformer/0 or opening/closing of the phase modifier equipment, use the graph in Figure 3 to analyze the fluctuations at this time. Figure 3 shows the ΔV-ΔQ fluctuation of the system in Figure 2. FIG. 3 is a characteristic diagram showing characteristics.

(1) When there is no change behind the current subordinate system 2, Δv, =
Since 0, AV = X, IQ...
・・・・・・・・・3.5 Also, when there is no change behind the upper system (1), Δv8=0, so ΔV=-X, @ΔQ ・・・・・・・・・
...3.6 and the straight line I, 1 passing through the origin on Figure 3
It becomes 1.

Axis) Next, when there is a change in the rear 4 pressures of the upper and lower systems Akatsuki 1 and 2, use the above equations 3, 3, 3, and 4 as Δv8. Solving for ΔV, first from equations 3 and 4, ΔvI = ΔV2 + (XI +x2)IQ -
Substituting song 3-7 into equation 3.3, ΔV=ΔVt +XtΔQ Therefore, lV, == AV −Xfi e IQ
Surface curve 3/8 Substitute 3/8 into 3/7 and get IV, = jV +xl @ j Q −
-369 This result Δv1. The process to obtain lv2 is from point P (Δ■, ΔQ) on Figure 3.

Draw a straight line with gradient , snoring, -↓- to ΔvI11I,
ΔV axis X2 X.

All you have to do is find the intersection with .

Reverse ∆V = X, ∆Q + ∆V, ・・Song・
・Song 3・l.

Δv=-x, ΔQ+ΔV, ...Curved surface 3.
11, so if Δvl and ΔV are given, ΔV, Δ
Q is ΔV axis section respectively ΔvhΔv1 % gradient −1, = 1
It is determined as the intersection of two straight lines Xl Xl .

(it) Furthermore, the above Δv1. Δ caused by the fluctuation of Nov2
■.

Considering Δn and Δ9 to eliminate IQ, assuming that there is no systematic variation, we can solve Equations 3, 12.3, and 13 for In and Δ9. Δn=ΔV +x1j Q ・・・・・・
...3.13-Q...3@14. Therefore Δn=ΔV+ ・・・・・・・・・
...3.15, and Δv is changed by operating the tap changer.
I harmonize e! It is clear from the above that the iV is adjusted from the opening/closing button of the equipment (11 When the back voltage v1 of the upper system 1 is changing, 1V-
The change in iQ is related to the actance xlK and is adjusted by the transformer tap change Δn.

(i) When the back voltage V of the lower system changes, iV-i
The change in Q is related to the actance x1 and is adjusted by the capacitance change Δ9 of the phase adjusting equipment.

It can also be seen that ΔV/ΔQ is proportional to the reactance xt*Xt and does not depend on the magnitude of iV, aV, respectively.

Conversely, depending on the magnitude of the voltage fluctuations ΔV,, iV, it is impossible to reduce the voltage and reactive power fluctuations Δ■, ΔQ to zero by operating only one of the fluctuations Δn, Δ9. It means that.

That is, if there is no reactance change such as a system switching operation, the change in 7V-iQ is the system back voltage Δv8. ΔV,
It is necessary to compensate for this change in the background voltage and make it zero.

For this purpose, it is determined where the variation of the fluctuations ΔV and ΔQ is in the range determined by the target value (dead band width) and the system reactance, and the optimal operation of n and 9 is performed based on the result. FIG. 5 shows the operating characteristics when using the system voltage-reactive power control method according to the present invention.

In Figure 5, 1, 2, and 3.4 are the target Δ■−ΔQ
is a rectangle representing the allowable variation range of .

At this time -Δ■o≦ΔV≦Δ■o ・・・・・・
・・・・・・3・17−Δq≦ΔQ≦Δq
3.18 is a satisfactory range.

Next, pass through the vertices of this rectangle and parallel to 3・5, 3・6 ΔV=-x, JQ+ΔQo/xt+ΔVo (12 and 14)・・・・・・・・・・・・・・・3・19 7V=-X , iQ I Qo/ xt-iV0 (32
and 34) 3φ20 1 V = x, l Qo + −”'-+ l V
. (41 & ff43) 2 X!・・・・・・・・・・・・3・22 Draw the four 1a# (.

The area surrounded by these is shown in the figure ((〜(Yu ■■ Fu・89
I decided to name it Tsuki [phase] 1' Juku. Also, from the quadrilateral formed by these four straight lines, we can create a quadrilateral (1) (2) (3) (
Let the remaining area after cutting out 4) be ■■■■.

Below, we will discuss how to drive iV-ΔQ into the target area (1) (21 (31 (4)) by operating n and 9 when it is busy in each of the above areas.

First, when ΔV and lQ are in the area = *3 up-scream D4+, we have to manipulate either n or 9, so ΔV-ΔQ becomes a straight line 21 (41) to *12 (52). Parallel k S J4X drives into the moving square (1), (2), (3), and (4).

When it is in either of the following ∆V, ∆Q, 'A■ (1 @ (i)), if only n or 9 is operated, the square (
1) (2) (3) (4), so n
Or operate one side of 90 to select @ area Ap (a3(,'C
71 into any area of yu<49, then upper 2
It is necessary to insert q into the middle of the rectangle +1) [21+33 <4) by the operation.

The reason why the above two types of operations are necessary is that the change in ΔV-aQ is ΔV=-x1ΔQ ・・・・・・・・・・・・
・3115ΔV = x2ΔQ ・・・・・・
It is clear from the table that can only take changes parallel to either 3 or 6. Putting the above in order, 'pA' is 1! 'Q y l V (xl 1 Q
'Dormitory-7■.

X.

...3.25 1 V < X, jQ--'-'--I V. :2 It is expressed as busy.

in the same way ^1 It is expressed as

As shown above (grid voltage, reactive power fluctuation ΔV,
When rQ satisfies (a) the above formulas 3.23 to 3.27, n
Or operation 9 (b) If the above formulas 3.27 to 3.30 are satisfied, perform operations n and 9 in the afternoon, and adjust these fluctuations to the desired target motion range with the minimum necessary operation of n and 9. It is possible to increase ΔV and ΔQw.

Next, the operation of the device of the present invention having the above-mentioned operating characteristics will be explained.

(υ First, the grid voltage and reactive power V and Q are the initial values vo.

When a change occurs from q to lv, jQ and a new value is taken, the cause of this change is the system back voltage V, , V2
The variation Δv1. If ΔV, its size is ΔvI:ΔV + x, jQ...
・・3・8ΔVt=ΔV −x, jQ ・・・・
・You can learn from songs 3 and 9.

Next, this variation Δv1. ΔV! The variation resulting from iΔV.

Δn and Δ9 during each operation to eliminate ΔQ′it are expressed by Equation 3. Therefore, the operating range of the tap changer is Δn, and the operating range of the phase adjuster is Δ9. is determined.

These operations tflΔn, Δ9 operate the winding ratio n and the forceless force 9 by the amount determined, but the operation amount Δ determined by the above formula
n and Δ9 are values determined in advance or obtained using actance "l*"t, without taking into account subsequent systematic changes.

Therefore, the reactance xl*xl will be identified by the variation ΔV, jQ caused by adjusting -1in, 9 on a trial basis.

At this time, it is assumed that there is no change in each variation Δ■I wΔ■.

As a result, .DELTA.V and .DELTA.Q take new values, but it is determined in which region in FIG. 6 these days are, and the operations are divided accordingly.

till Now for simplicity (ΔV, ΔQ) the value Δ above the coordinate system
V.

It is expressed as Δ which is the vertex of the vector of jQ.

When the vertex Δ of and is on the area represented by area ■0 in Figure 6, both operations of key*tΔn and Δ are required,
First, operate the adjustment amount 9 and drive it to the area [phase] (Tsuru. If it is in this area CQ: >, then operate the adjustment amount 9 to parallel the Iα line 11 or 55VC by the variation Δ ■, lQ is turned into da and driven into the pq region surrounded by four @a21.41, 12.32.This region is rectangle (1) (2) (31( 4) and four triangles ■■■■, rough shape +1) +21 (3)
+4) If you go inside (expressed as opening 1234 on the figure), no operation is necessary.

By operating the adjustment amount n from the area +73p, a triangle (0■(
It is necessary to perform the operation again when entering . From the shape of the figure, from the triangle ■■, the adjustment amount n is successively manipulated, and from the triangle ■■, for example, the adjustment amount 9 is manipulated, and the triangle ■ (0 is output immediately).

Next, when Δ is on the area represented by the area curve (boil) in Figure 6, first manipulate n and follow the % straight line 21.45 by the variation Δ
V and ΔQ change and the vertex Δ is the area! After entering the cavity or the pirate trap, operate adjustment amount 2 and adjust the variation Δ■ parallel to the straight line 12.54.
, ΔQ is changed to drive it into the 'pfX region surrounded by four straight lines 21, 41, 12, and 32. This area is the dead zone area of 1■ shape (1) (2) (31 (4) and 4 triangles
The operations within this area are the same as in the previous case.

(The operation above tii1 is the operation i [adjustment amount Δn that should be adjusted using the equal one-turn actance of the system estimated for forward movement.

19 is calculated, but K to change Δ■ and ΔQ from the area (~■(Q■ to the area [phase] The obtained 11α is inappropriate, and using this value, the area is from (B), and the area (from @ (◎
This means that you will enter the next area of the adjacent area.

In the first embodiment of the present invention, in order to prevent such an operation, the following operation is performed.

(a) When performing the initial busy/reactive force amount 9 operation, the fluctuations Δ■, ΔQ caused by changes in the grid back voltage before this operation are expressed as ■, , Q(+1).

This iV, aV estimated from ΔQK, ==
, V + 8t jQ''ΔV, = iV -X, JQ is partially compensated for and the invalid tI tolerance 9 is operated.

The operation f′r, t of the reactive power 9 is jV −x, , Q: j9” AV +
Let's go inside.

Also for area l helmet 1 So just choose 5 A+M.

(mouth) In the same way, when operating the Makatsuki ratio n for the first time, use ff
In order to compensate for Δ■, Δ■2 that caused the IIFJ 1st measurement 1-tri change, v, , , x, IQ J is partially supplemented, and a new variable S difference ΔV, Δ( is distributed by X!11!(scream(
K to enter the irises. ν1j In this case.

For the area [stock]; In>-μ(-Δv01 x112, For the area [phase]; It is sufficient to determine the adjustment dragon Δn so as to satisfy the following.

Here, the reactive power fJ! 4. Since Δ9 will not be operated, it is not necessary to specify it.

If the above operation (1) or (1) is performed, Δ■ and ΔQ can definitely fall into one of the regions )e@l@).

(c) After the above operation, do the following for the area [stock]. =B 1 XtlQ'''1 Region ■For [phase], 19=ΔV -x, 7Q'''' The variation ΔV, Busy trying to improve ΔQ.

The specific sliding power of the voltage-reactive power control method according to the embodiment based on the principle of the present invention will be described below.

FIG. 7 shows a configuration diagram of a 1 Po pressure reactive power control system according to an embodiment of the present invention.

In FIG. 7, numerals 0 to 6 and 10 to 61 are all the same as the parts or parts in FIG. 1, so their explanation will be omitted.

7 has the same input/output relationship as the one in FIG. 11, ie, vQc-it path, but the internal configuration is different from that in FIG. 1, as shown in FIG. 7. Essentially busy.

Furthermore, it should be noted that the phase adjustment devices 5.51 and 6.61 are more quickly responsive to the output signal of the VQC device 7 when they are so-called static type non-active power adjustment devices with a built-in semiconductor device than conventional devices. This is more preferable because it produces changes in the systematic book, making it possible to take advantage of the features of the present invention.

To explain the individual elements constituting the VQC device 7, 71 to 76 are converters that convert reactive force into voltage; 74;
A converter 75 converts the grid voltage into a heavy voltage, and a converter 75 converts the current position of the on-load tap changer to an appropriate signal voltage (digital is possible).

76 is a central arithmetic processing unit (hereinafter referred to as CPU) which receives input signals from the converters 71 to 75 and processes them for calculation and judgment.
It has an input/output section, an operation/judgment section, and a storage section. A commercially available microcomputer afO is sufficient to satisfy this purpose and function. Details will be described later. 77.7879 is the tap changer control device 4 in your own facility
1 and the reactive cardiac force adjustment devices vt5, 6, 51, and 61, and its commands are given from the CPU 76. The details of the CPU 76 will be discussed below.

As mentioned above, the CPU 76 receives the output signals from the converters 71 to 75, and this receiver is provided with an analog input/digital signal conversion circuit. That is, some of the recent devices that have an analog input signal multiplexer, an A/D converter, and a bit parallel digital input port are integrated into one.

Here, the 5 CPU 76 is assumed to have a memory (RAM, ftOM) in addition to the so-called central processing 4FE. Furthermore, output circuits 77, 78, 7 are provided on the output side of the CPU 76.
There is a part numbered 9, but this part is the control button [Complete 41,
This part increases the level of the output signal from the CPU 76 to energize the CPU 76 by +11, and the corresponding CPU 76
The digital output is connected to the boat.

This hardware configuration is extremely common for Digital Sugi processors, and although its performance is limited, it is not particularly new and is commonly available and can be put to practical use. Do not add any explanation.

Next, the operation of this embodiment will be described with reference to figures.

FIG. 8 shows an operational flowchart of the embodiment shown in FIG.

The operation of Φb in the embodiment of the present invention will be sequentially explained with reference to FIG.

First, from the initial explosion start, in processing block 1, the system voltage V% invalid 1 Q is measured and compared with the initial value Vo -Qo, and the differences Δv0' and ΔQ0' are calculated. From this value, the fluctuation amount jV, , Δ of the system back voltage V, , V,
V! Calculate.

Based on busy processing block 2, from these values Δn, 7
9 is determined by the following formula, and a part of it is incremented.

Jn"': ko(,y(01+x,JQ"")9"
=== I(o (, v+111 x, ΔQ10ゝ)
--X.

Next, around this time, n1ot, , 9 (originated from 01 and f
! Let #min iV and iQ be lower i.

ΔV, ΔQ″′ From these (+N), xl w xt can be calculated using the preliminary system pressure-reactive force control system injection 7.

Next, as a result of this, slight fluctuations of ΔV and ΔQ should have occurred, so let these values be ΔV and ΔQ. OΔ■, JQ
It is determined whether the vector Δ defined by the value of is within this range.

(1) If the vector l is in the range of area 20 in FIG.

The manipulated variable 19 at this time is given by the processing block 4 as follows.

The new fluctuations ΔV and ΔQ resulting from this are IV, a
Q'', unless there is phylogenetic differentiation, the range of area G and egg in Figure 6 will be busy.

Here, in judgment block 5, if the vector Δ belongs to the area [Kuu], the primary winding ratio n is manipulated.

The winding ratio n is manipulated by processing block 6 as In = j
Do this to satisfy the value given by V + X, > Q.

If the newly generated fluctuations ΔV and ΔQ as a result of these n operations are determined by judgment block 7, if IV and JQ belong to the area ■■ in FIG. Perform operations. In processing block 8, when the variation ΔV and JQ belong to the region ■■ in FIG.

(1) If in the judgment block 11 the vector Δ belongs to the area shown in FIG.
Perform operations.

+2J The appetizer Δn for n operations at this time is given by the following formula.

The resulting new variation ΔV, ノQ is ΔV, ΔQ1
111, the area in Figure 6 [phase] [phase] unless there is a change in the string
into the realm of.

Here, in decision block 16, the vector is the area ■[stock]
If it belongs to the area 9, the next processing block 14
Perform operation #2. If it is not X4, try the E\n operation again.

The next nine operations are processed by the processing block 14 so as to satisfy the value given by Δ9 = IV −XfiΔQli+.

This 94s! New fluctuations ΔV, ΔQΔ as a result of the
■゛9. If ΔQ″′, the vector Δ(lV
.

Note that the vector Δ(Δv′3′,
JQ) belongs to the area ■■ in FIG. 6, it is determined by the judgment block 16 that the exe is a little difficult to perform with the 9 operations, so the process returns to the n operation of the processing block 12.

Obviously, when the vector Δ does not belong to any of the areas
234, this is confirmed at decision block 9 and stopped.

As described above, as an embodiment of the present invention, a dead zone of Δ■-ΔQ control as shown in FIG.
In order to accommodate v, ΔQv, the plane of ΔV−ΔQ is transformed into an area (
〜■■(D Q■■@ Divide into, and the variation iV,
A control method for adjusting the adjustment values Δn and Δ9 commensurate with ΔQK has been shown.

There are several possible variations in the shape of the dead zone, but even in such cases, it is possible to converge the fluctuations ΔV and ΔQ within the adjustment range using the same concept.

As mentioned above, the pressure of the system according to the present invention is
To summarize the features of the turtle force control system, (a) It measures the system's polyvoltage-reactive power V-Q changes, identifies the system's resistance actance, and estimates the background voltage fluctuation, so it reduces the amount of operation There is little excess or deficiency.

(b) Tap changer, h1! due to 1 pressure fluctuation behind the power supply side and load side! Since both of the phase equipment are operated in the appropriate order, there is no need to over or under operate the side equipment.

(C) In particular, tap changers and the like, which are limited in the number of operations per day, can be given more appropriate opportunities to operate using this method.

There are effects such as

Although one embodiment of the present invention has been described in detail by citing an embodiment of the present invention, other embodiments of the present invention are conceivable. It goes without saying that it is included in this.

[Brief explanation of drawings]

FIG. 1 shows a 91-by diagram of the conventional voltage-reactive power control method based on the individual side tita+<, and FIGS. 2 and 3 are detailed explanations of the present invention. FIG. 3 shows an adjustment model system diagram of the power system, FIG. FIG. 8 is a block diagram of the reactive power control method, and FIG. 8 is an operation flow diagram of the voltage-reactive power control method according to the same embodiment. 0...Transformer, 1, 2...Power transmission 1, 6...Transmission (
Distribution) Straight line, 4...Tap changer, 5...Shunt IT accelerator, 6...Static capacitor, 41...Switcher control device t, ei, 51...Shunt reactor shunt Temperature, 61... Shuttle switch for star conditioner, 11.21.
51...Pat voltage transformer. 12.22.52 Current transformer %7 Voltage-reactive power control device, 71 to 75 input signal converter. 76-...Central #A processing flt+t' (CPU),
78 to 79... Output No. 41 converter. Agent Makoto Kuzuno (and 1 other person) Figure 1 Figure 1 Figure 5 Figure 6 Procedural amendment sound (spontaneous) Mr. Commissioner of the Japan Patent Office l, Indication of the case Patent Application No. 12471/1983 3, Person making the amendment Representative Hitoshi Katayama Part 5, Subject of amendment (1) Detailed description of the invention in the specification column (21 Drawing 6, contents of amendment + 11 “Central power dispatch center” on page 3, line 11 of the specification) (The phrase “starting order” on page 5, line 14 of the 21 Specification is corrected to read “Central Dispatch Control Center.”)
+31 The phrase "in the present invention" on page 6, line 12 of the specification is amended to read "the present invention". (4) On page 7, line 8 of the specification, the phrase ``It shall be capable of changing.'' shall be amended to ``Also shall be capable of increasing.'' (5) Line 9 of page 7 of the specification, line 3 of page 12 of Book #I, line 8 of page 7 of the specification, and line 10 of the same page. Same page, line 15, same negative line, 16th line, details page 16, 1st
Line 1, line 10 of the same page, line 14 of the same page. Page 7 of the specification, line 8, page 78 of the specification, line 4, page 16 of the specification, line 8, page 19 of the specification, line 8. Line 13 of the same page, Line 10 of page 20 of the specification, Line 1 of the same page
Line 8, page 21 of the specification, line 1, specification no. 27, negative 1
Line 16, page 28 of the specification, line 19 of the same page, line 13 of page 29 of the specification, line 11 of the same page, line 19 of the same page , the ``9'' in the 5th line of the 30th page and the 9th line of the same page is corrected to ``q''. tar #4 a'tM m Page 7, line 10, page 14, line. Line 15 on the same page, Line 3 on page 10 of the specification, Line 5 on the same page, Line 6 on the same page, Line 8 on the same page, Line 11 on the same page, Line 14 on the same page. Mei 411, page 11, line 7, same negative 1st
2nd line, 17th negative line 12 of the specification, 115th line of the specification, 17th negative line of the same page, 18th line of the same page, Akiri 1 die, 18th page 1
line, line 15, statement number 20, negative line 1, bright #
Book I, 21st line of Tei, line 7 of the same page, line 8 of Tei of the same page,
Tongzhen line 10, Tongliao line 11, specification page 22, page 1
6th line. Bright #tIJy47F, 23rd 廝, 8th stroke, specification No. 26, negative line 20, specification No. 27, negative line 1, same page, line 4. Dosadasu line 5, Dosada line 17, Dosada line 19. Specification No. 29 Teisu line 16, Specification No. 31 Negative 2nd (7)
At the end of page 10 of the specification, the phrase ``It will be adjusted'' will be corrected to ``It will be adjusted (Figure 4).'' (8) Negative line 13 of the specification, line 7 of the same page, lines 12 to 13 of the same page, line 16 of the same page, line 19 of the same page, negative line 19 of the specification Line 2, page 4, line 3, page 1
On the 7th line, ``(1n(2ba3)(April) is r123
Correct it to 4J. (9) In the 25th page, line 14 of the specification, the phrase "nap-formation" is corrected to "chip-formation." In the 5th line of page 31 of the Kan specification, the word ``acceptance inspection'' is corrected to ``convergence.'' Figure 5 is corrected as shown in the attached sheet. 7. One or more documents containing the revised catalog of attached documents in Figure 5

Claims (1)

[Claims] The system voltage and reactive power are controlled within a predetermined range according to the relative relationship between both the system 'r'l pressure and reactive power of the power transmission system #i! 4! In the Toraou-reactive power control method,
The system voltage and reactive power were changed by operating the tag switch and reactive power adjustment device of the transformer arranged in the system, and the system flux actance was identified from the changes in the system voltage and reactive voltage. The deviation of the upper 66 system'1C pressure and reactive power caused by the subsequent fluctuation of the back voltage on the system side is determined from the above actance determined by the predetermined dead band width and identification of the system voltage and reactive power. A voltage-reactive power control system, characterized in that operations of the tag switch or the reactive power adjustment device are selected and ordered by determining whether a specific functional relationship is satisfied.