JPS58190236A - Automatic power factor regulation controller - 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 relates to an automatic power factor adjustment control device,
In particular, it relates to an automatic power factor adjustment control device that detects physical factors such as reactive power, reactive current, and power factor that are proportional to the reactive component of power used in a circuit, and outputs a signal that adjusts the closing type of a power factor correction capacitor. It is something.

Figure 1 is the conventional power factor mill IE! In the 0m1 diagram, which is an electrical wiring diagram showing the l-axis regulating device, the circuit bus bar (1) is the one whose power factor is adjusted. The instrument transformer (2) detects the voltage of the circuit mother w.The instrument current transformer (3)
) detects the current of the circuit bus (1). The power factor adjustment device 1t (4) measures the reactive power by inputting signals from the measuring transformer (2) and the measuring current transformer (3), and this value is applied to the preset capacitor. When the closing point is reached, the make contacts (41m) (41f) are closed to output the capacitor closing signal, and when the preset capacitor cutoff signal is reached, the break contact (42
m) - (41f) is opened to output a capacitor cutoff signal), these signals are output in a sequence called cyclic control, and these signals are contact outputs that are output for a certain period of time. It is. Load (50 incline 5c
) are respectively connected to the circuit bus (1) via transformers (6c) to (6c), and are supplied with power from the circuit bus (1). Capacitor for power factor improvement (7m) - (
7f) are connected to the circuit bus (1) via the IE magnetic contactors 8m)-(8f) and series reactors (Im)-<If), respectively, to improve the power factor of the circuit bus (1). . The make auxiliary contact (811) - (81f) closes when the electromagnetic contactor (8m) (8f) 0 is closed, and is connected between the stop signal of the automatic power factor adjustment device (4) - Q and the common terminal. They are connected in series, and when all are closed, the output of capacitor input fP1 from the automatic power factor adjustment device 1 (4) is stopped. Break auxiliary contact (8! Hatake)”-
(8!f) Ha! It closes when the magnetic contactor (8szt (8f)) opens, and is connected in series between the cutoff signal stop terminal and common terminal of the power factor automatic wM adjustment device 1t (4), and when all are closed, the power This is to stop the output of the capacitor cutoff signal from the self-control device (4).The control circuit consists of a relay and a timer, and the automatic power factor adjustment device (4). The opening/closing of the magnetic contactor (8m) to (8f) is controlled by capacitor input from the RFI line, and the wL magnetic contactor (80 to (8f) ) by opening the capacitor (
7m) - (7f), and can also be used to manually control the opening and closing of the TIIL magnetic contactor (8a) to (ilf).The make auxiliary contact (81
m) (81f) and break auxiliary contacts (8h) to (8
! f), even though all capacitors (7) to CTf) are turned on or cut off, the power factor remains constant.
I + adjustment device! To prevent the control a1 order of the 1111 from being disturbed when a capacitor input signal or a capacitor cutoff signal is output from 1l(4) and unnecessary operation is caused to a relay, etc. of a control circuit unit QO. It is an object.

Next, the operation will be explained. Now, when the power factor of the circuit bus (1) decreases and its value becomes less than a predetermined value, the automatic power factor adjustment device (4) first closes the make contact (41) in a predetermined order. . For this reason, the control circuit section α01
．． i Open the electromagnetic contactor (8 rin) and connect the capacitor (71 rin).
) to the circuit busbar (1). Even if the capacitor (7m) is connected to the circuit bus (1), if the power factor of the circuit bus (1) is still below the predetermined value, the automatic power factor adjustment device (4) next closes the make contact (41b). Open the capacitor (7b
) to the circuit busbar (1). Make contact points (
41c)...<41f) and connect the circuit bus (1
) until the power factor of the capacitor (7c) and
...(7f) is sequentially connected to the circuit section M (1).

The conventional power factor automatic #JJ adjustment control device is configured as described above, and the control circuit section σQ is provided for one power factor automatic adjustment device (4), and the control circuit section σQ is provided for one power factor automatic adjustment device (4).
The number of circuits in (7f) is the make contact (41m)-(41f) and break contact (4
There was a restriction on the number of output circuits of the control I contacts (2m) to 02f) (the number of output circuits is 1 for the make contact (41g) and the break contact (42m)) 0 For example, the power factor automatic adjustment device 1
If the number of control contact circuits in (4) is six, the number of circuits of the capacitor (T m ) (7f) that can be controlled is essentially six.

Therefore, in order to control the capacitor of the 1 [i11] path, two sets of the automatic power factor adjustment device (4) and the control circuit section QQ are required.

However, the two sets of automatic power factor adjustment device (4) and control circuit are the same instrument transformer (2) and instrument current transformer (3).
Since the automatic power factor adjuster (4) with the stricter setting value is connected to A capacitor (7a) that outputs a cutoff signal and is connected to the device
There is a drawback that unless all the capacitors (7f) are turned on or cut off, the capacitor (7m) (If) held by the receiver of the other device cannot be turned on or cut off.
Although the capacitor (711) (7f) of one device is turned on and shut off, the capacitor (7f) of the other device
m)-<7f) causes a phenomenon in which the input is hardly controlled in one cycle.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above. An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 2 and 8 are electrical wiring diagrams showing essential parts of an embodiment of the automatic power factor adjustment and control device according to the present invention. In FIG. 2, fill, l! 1 power factor automatic adjustment device (4X
), (4Y) measure the reactive power using the signals of the voltage transformer (2) and voltage transformer (3) shown in Figure @1 as input, and this value is set in advance at the capacitor input point. When reaching , the make contacts (41Xa) and J41Xf respectively
) * (No. IYa) (41Yf) is closed to output the capacitor closing signal, and when the preset capacitor escape point is reached, the break contact (4gXa) pin A drop Xf ), (42Yi) ~ (4 mYf) + 8 Lt:2 ff sensor cyclic signals are output], and these signals are output in an order called cyclic control.

Further, these signals are contact outputs and are output for a certain period of time. Relay coil (1xXs) (11Xf).

(IIYl)-(llYf) and (12Xa)~(IJ
Xf)e(11tYa)(IgYf) are make contacts (41Xi)(41Xf) and (41Ya)(41Y
f) and break contact (42Xa) (42Xf)
, (42Yi) to (42Yf) are connected in series, respectively make contacts (11Xal) to 411Xfl),
(11Ys+1) ~ (11Yfl) and break contact (
IgXil)-(11Xfl), (1!Yal)Is!
Yfl), t-'c.

The set coil (181) of the first self-holding relay (transfer) that constitutes the control circuit section (10 m) of copper 1 is the make contact (
11Xil) (11Xfl), and the reset coil (18g) is connected to the make contact (II
It is connected in series with the respective parallel circuits of YHatake1)-(11Yfl)o.

The set coil (port 1) of the second self-holding relay (b) constituting the eighth control circuit (10b) is connected to the break contact (1
The reset coil (14g) is connected in series with each of the parallel circuits (2Xil) to (12Xfl), and the reset coil (14g) is connected to the break contact (1
2Y! 11) to (IgYfl) are connected in series.

The first timer relay coil 4 is a set coil (181)
The off-delay make contact (16m) is connected in series to the make contact (181) of the TSL automatic power factor adjuster (4x) and the common terminal (44X) There is. The timer relay coil trout of turtle 2 is the break contact (18) of the set coil (181).
1b), and its off-delay make contact (16m) is connected between the input signal stop terminal (411Y) of the second automatic power factor adjustment device (4Y) and the common terminal (44Y). The timer relay coil O of @8 is connected in series to the make contact (1411) of the set coil (141), and its off-delay make contact (lmamaro) is used to interrupt the first power factor adjustment device @ (4X). Signal stop terminal (
46X) and the common terminal (44X). The timer relay coil (to) of Nishiki 4 is the set coil (141
), and its off-delay make contact (18m) is connected in series to the break contact (141b) of the off-delay. In Figure 8, the electromagnetic contacts (8Xm) (8Yf) i!Each device:
Ik (11Xi) (11Yf) make contact (11
Xa2) (11Yf series connected closing auxiliary coils (81gm) to (slYf) and closing auxiliary coils (81
Make contact (81Xal) of Xa ) to (8iYf)
(81Yfl) is connected in series to the closing coil (82X!
) ~ (82Yf) and relay coil (12Xa) -
(12Yf) break contact (12xag) ~ (Ig
The cutoff coils csgXa) to (8
8Yf).

Next, the operation will be explained. Now, the circuit amount &
! The reactive power of jl (1) increases and the first power factor automatically -
When the closing point set value of m (4X) is reached, the make contact (41Xi) is closed for a predetermined time and the relay coil (11X
a) Excite. For this reason, the wt magnetic contactor shown in Fig. 8 (
The make contact (11Xa2) connected to the steel l Connect the capacitor (?i) corresponding to the automatic power factor adjuster (4x) to the circuit bus (1). On the other hand, when the relay coil (11Xa) is energized, the make contact (11Xal) shown in FIG. 2 is closed, and the set coil (181) of the first self-holding relay a4 is energized. ) to close the break contact (18
1b) is released.

Therefore, the timer relay coil (g) of %111 is energized and #! The 2nd timer relay coil (b) is demagnetized, which opens the make contact (1@m) and the 2nd timer relay coil (b) is demagnetized.
The automatic power factor adjustment device (4Y) becomes ready for capacitor closing operation. On the other hand, the make contact (ISa) waits for the timer time to elapse and becomes closed, and the % I! The power factor automatic adjustment device ll (4X) of 1 becomes incapable of closing the capacitor. In this case, the off-delay timer time of the make contact (16m) is IICfa contact! i1
(8Xa) is set longer than the closing operation time.

Next, the reactive power of the circuit bus (1) continues to increase, and the 8th
Automatic power factor adjustment system* (4Y) When the 0-throwing point setting value is reached, the make contact (41Ya) closes for a predetermined period of time and continues!
! The i' coil (11Ym) is energized, the wt magnetic contactor 8Ya) is energized in the same way, and the capacitor (τa) corresponding to the second automatic power factor adjustment device (4Y) is connected to the circuit bus (1Y). ). Meanwhile, the reset coil (IH) of the first self-holding relay 4 is energized, demagnetizes the timer relay coil 4 of LIT, and energizes the second timer relay coil 4 of the TSL automatic power factor regulator (4x). The capacitor is turned on and the -8 automatic power factor adjustment device (4Y) is set to a predetermined off-delay. The following make contacts (41Xb), (41Yb),
...(41Yf) and performs the same operation.

Next, a case where reactive power decreases will be explained. When the reactive power reaches the first power factor regulator (4Xρ break point set value), the break contact (42Xa)' and the inter-time release relay coil (12Xa) are demagnetized.

For this reason, the break contact (12Xa 2 ) connected to the electric contactor (8 The break contact (12Xal) shown in the figure closes and the logic self-holding line 1! Set coil of vessel α◆ (1
41) is energized to close its make contact (141a) and open its break contact (141b). Therefore, the eighth timer relay coil is energized and the fourth timer relay coil is energized.
The timer relay IIEm coil is magnetized. As a result, the change contact (Hlm) is opened, and the power factor adjustment device (4Y) of Ayu 2 enters a state in which the capacitor is in a state where it is unable to operate. On the other hand, the make contact (17m) waits for the timer time to elapse and returns to the closed state, and the first automatic power factor wII adjustment device (4X) becomes unable to cut off the capacitor. In this case, the off-delay timer time of the make contact (171) is set to be longer than the breaking operation time of the electromagnetic contact 81 (8Xa).

Next, the reactive power of the circuit bus (1) continues to decrease, and the second
When the cutoff point setting value of the automatic power factor adjustment device (4Y) is reached, the break contact (41Ya) closes for a predetermined time and the switch WI
Demagnetize the L coil (1jiYa), energize the electromagnetic contact fi (8Ya) in the same manner, and connect the capacitor (71) corresponding to the automatic power factor board device (4Y) to the circuit bus (1). On the other hand, the reset coil (14ffi) of the second self-holding network wL device (b) is energized, demagnetizes the timer relay coil auxiliary @8, and energizes the fourth timer relay coil (to). @1 automatic power factor adjustment device (4x
) is enabled for continuous operation of the capacitor, and the second
After a predetermined off-delay timer time, the automatic power factor adjustment device (4Y) is placed in a state in which capacitor closing operation is disabled. The following break contacts (4jlXb), (42Yb)
...(4gYf) and perform the same operation.

In addition, in the mg diagram, -1, 2nd . 8th automatic power factor adjustment device it (4X), (4Y) closing signal stop terminal (
41X), (41Y) and common terminal (44X), (44
Similarly to the conventional example shown in Fig. 1, electromagnetic contacts 'a (8Xa) -=
(8Xf), (8Ya) = (8Yf) (The make contact and break contact of the D auxiliary contact are connected in series, and the electromagnetic contact 'a (8Xa)... (IIXf), C3Ya
)...(8Yf) When all of (8Yf) are turned on or cut off, the turn-on signal or cut-off signal is sent from then on. The second automatic power factor adjustment devices (4X) and (4Y) can be brought into a state in which they cannot output.

Figure 4 is an electrical wiring diagram showing another embodiment of the electromagnetic contactor. In FIG. 4, the make contact (8 axes) and break contact (84b) have overcurrent and overvoltage, respectively.

These are make contacts and break contacts for relays that detect undervoltage, ground faults, case swelling, etc. In other words, when an overcurrent occurs, the make contact (8 axis) is closed and the break contact (84b) is released, cutting off the contactor (8Xa) and making it impossible to turn it on again without resetting it. It is.

Nao, xi contactor (8Xm) = (8Yf) 1st.
A switch for switching between automatic and manual operation modes may be provided as the control circuit section (1Gm) and (10b) of the Skm, so that manual operation can also be performed.For convenience of explanation,
Pan 1 using the first to fourth timer relay coils (to) to (to). Second power factor automatic adjustment device (4X), (4Y)
outputs a capacitor closing signal or a shutoff signal, and after the timer expires, the closing signal stop terminal (41X), (411
Y) and the common terminal (44X), (44Y) or between the cutoff signal stop terminal (46X), (4IY) and the common terminal (44
XL (44Y) is configured to close each terminal, but unless a timer is set, the circuit between the terminals will be closed as soon as the closing signal or cutting signal is output, which will interfere with the closing or cutting operation of the capacitor. This is because there is a risk that this may occur. However, the automatic power factor control devices that are currently manufactured, sold, and used are such that once the power is turned on, it is zero! When a signal or cutoff signal is output, even if the terminals are closed during the output period, the output signal always has a predetermined time width. 4 timer wIL
A timer function is not necessarily required for the relay coils, and an ordinary relay coil can be used instead.

As described above, according to this invention, all, i@! Since the operation frequency of the maximum number of controllable capacitor circuits in the automatic power factor adjustment device is controlled to be equal, it has the effect of extending the life of the device and improving reliability.

[Brief explanation of drawings]

FIG. 111 is a line diagram showing a conventional power factor automatic adjustment control device. In the figures, the same parts or corresponding parts 1ζ in each figure are denoted by the same reference numerals or the same reference numerals with a suffix.
(1) is the busbar circuit, (2) is the voltage transformer, (3) is the voltage current transformer, (4X), (4Y), and turtle 1. lIg power factor automatic # making device, (41Xm) (41Yf) are make contacts, (4gX1)-(41Yf) are blank L/4 contact AC+sx), (+sy) is closing signal stop terminal, (4
4X), (44Y) C common terminal, (45X). (45Y) is the IIT signal stop terminal, (5m) (6c)
is the load, (7m) (?f) is the capacitor, (8Xa)
~(1lYf) is a magnetic contactor, (84m) is a make contact, (84b) is a break contact, (10m), (10b
) is copper 1,1i14D control circuit section, (IIX Maro) ~ (1
1Yf), (111Xm) to α2Yt) are relay coils, (11Xa 1 )(11Yf l) e (11
Xi2) - (11Yf 2 ) is the make contact, (1$1
Xal)be1! Yfl), (1$lXa illusion~(11Yf
ri is the break contact, (Ll, (14th I, scolding
ct self-holding relay, (1g1). (141) is a set coil, (1mg), (tag) is a reset coil, (181m), (141a) is a make contact, (181b) 1 (141b) is a break contact, trout ~ (to) is Wk1 ~ @4 timer relay coil, (
15si) to (18m) are make contacts. Agent: Patent Attorney Makoto Kazuno - Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) The first output signal outputs the capacitor input signal and the capacitor break signal as independent pulse contact signals.
Second automatic power factor! 1i7 adjustment device, set by the capacitor input signal of the power factor automatic adjustment device of 1.
an #Ag self-holding relay that is reset by a capacitor failure signal of the third or first power factor automatic adjustment device when a capacitor failure signal of the power factor automatic adjustment device is activated; Said 1st. An automatic power factor adjustment control device characterized in that the power factor mill vJ adjustment devices of the ati and gg are alternately energized depending on the state of the second self-holding relay set. (2) No. 1.1! The automatic power factor adjustment device H has a closing signal stop terminal that stops outputting the capacitor closing signal when connected to the common terminal, and a closing signal stop terminal that stops outputting the capacitor switching signal when connected to the common terminal. A first cut-off signal stop terminal. #iil self-holding relay set,
A plurality of relay contacts energized by the reset condition allows the rudder to be turned off! The power factor automatic adjustment meter m device according to claim (1), which is configured to perform IIIa.