JP2001037088A - Power controller for plural generating facilities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power controller for a plurality of generating facilities which are capable of omitting a common control panel. SOLUTION: This power controller for a plurality of generating facilities comprises on effective power control block (a) for taking deviations of an own number machine frequency from a target frequency, adding own number machine effective power when operating the one machine and an opposite side number machine in the case of operating the plurality of the machines to the deviation, further adding own machine effective power to output a frequency signal, and a reactive power control block (b) for taking deviation of the own number machine voltage from the target voltage, adding the own number machine reactive power in the case of operating one machine and the opposite side number machine reactive power, when operating a plurality of machines to the deviation, and further adding the own number machine reactive power to output a voltage signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power control apparatus for a plurality of power generation facilities including emergency use or regular system separation.

[0002]

2. Description of the Related Art In a plurality of power generation facilities including an emergency power generation facility or a multi-generation power generation facility of a system separation type, a balance control of active power and reactive power of a generator based on power transmittable power, voltage control, Constant (rated) control of the frequency is required.

FIG. 2 and FIG. 3 are block diagrams showing conventional control of active power and reactive power, respectively.
And the No. 1 generator board G1 and the No. N generator board GN. FIG. 2 shows a block for outputting a frequency increase or decrease signal to a governor (not shown) by active power control, and FIG. 3 shows a voltage increase or decrease to an automatic voltage regulator (AVR) by reactive power control. The block which outputs a lowering signal is shown.

Referring briefly to FIGS. 2 and 3,
In FIG. 2, the common control panel CC includes a bus frequency setting device F
A frequency deviation between the BS and the bus frequency detector FB is obtained, and a frequency correction value is obtained for the deviation through a dead band and gain adjuster rf. On the other hand, the outputs of the N generator output detectors PG1 to PGN are added together, then averaged by a divider m, and the frequency correction value and the average output of the divider m are added at an addition point ADDf. In addition, the generator output set value P
Get GS.

When the generator output set value PGS is sent to each of the generator panels G1 to GN, the difference between the generator output from the generator detector PG1 and the generator output from the generator detector PG1 will be described for each of the generator panels G1 to GN. Is taken at the addition point ADD2,
Adjustment is performed by the gain / dead band adjuster rw, and a voltage decrease signal or a voltage increase signal is output to the governor via the on / off controller C1. The switch SWO
The load transfer block 01 is switched to set the generator output to 0 and stop when the load decreases and the generator output decreases.

Similarly, in FIG. 3, the common control panel CC takes a voltage deviation between the bus voltage setter VBS and the bus voltage detector VB, and responds to the deviation through a dead band and gain adjuster rV. Get. On the other hand, the outputs of the N generator reactive power detectors QG1 to QGN are added, then averaged by a divider m, and a voltage correction value is added at an addition point ADDV to obtain a reactive power set value PQG. .

In each of the generator boards G1 to GN to which the reactive power set value PQG has been sent, regarding G1, the difference from the reactive power detector QG1 is obtained at the addition point ADD4, and the gain / dead band adjuster is used. Adjustment by rB is performed,
AVR (not shown) via on / off controller C1
Output voltage increase or decrease signal. The load transition block 01 switched by the switch SWO is for setting the generator output to 0 and stopping the operation as described above.

[0008]

As described above, in the operation control of a plurality of power generation facilities, even when the power generation facilities are turned on or off, the first power generator boards G1 to N are used. In addition to the GN, a common control circuit, a detector such as a generator bus PT, a common control panel CC having a control power supply, and the like are required.

[0009] However, the above-mentioned power generation equipment takes up an occupied area, which goes against the demand for reducing the installation area and cost, and in particular, in a place adjacent to an urban area, land acquisition is difficult. This is a serious problem.

The present invention has been made in view of the above-described problems, and has as its object to provide a power control apparatus for a plurality of power generation facilities in which a common control panel is omitted.

[0011]

The present invention that achieves the above object has the following matters specifying the invention. In the first invention, a deviation between the target frequency and the own-unit frequency is obtained, and the deviation is set to 1
The active power control block outputs the frequency signal by adding the active power of the own unit in the case of the unit operation and the active power of the partner unit in the case of the multiple unit operation and further adding the active power of the own unit. .

In a second aspect of the present invention, the deviation between the target voltage and the own-unit voltage is calculated, and the deviation is added to the own-unit reactive power in the case of single-unit operation and the other unit's reactive power in the case of plural-unit operation.
Further, a reactive power control block for outputting a voltage signal by adding the reactive power of the own machine is provided.

A third invention is characterized in that, in the first or second invention, at least one of the active power control block and the reactive power control block is formed by a generator panel.

According to a fourth aspect, in the third aspect, the block is provided with a sequencer having the same software.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Here, an example of an embodiment of the present invention will be described with reference to FIG. In FIGS. 2 and 3, N
As described above, FIG. 1 shows two power generation facilities No. 1 and No. 2.

In FIG. 1, (a) is a block diagram of active power control, and (b) is a block diagram of reactive power control. In FIG. 1A, a deviation between the respective frequencies of the target frequency setter FGS and the own-unit frequency detector FGO is taken, and this frequency deviation is passed through a gain / dead band adjuster rf to obtain a frequency correction value. On the other hand, when one generator is operated, the active power by the active power detector PGO of the own machine is switched by the switch SWW when the two generators are operated.
A frequency correction value is added to this power and added at an addition point ADD1, and further at an addition point ADD2 this value is added to the active power by the active power detector PGO of the own machine. In this way, the correction value is added to the active power,
A frequency increase or decrease signal is sent from the on / off controller C1 to the cabana via the dead zone adjuster rw.

In FIG. 1B, the respective voltage deviations between the target voltage setter VGS and the own-unit voltage detector VGO are taken, and these voltage deviations are used as gain / dead band adjusters rv.
To obtain a voltage correction value. On the other hand, as in FIG. 1 (a), the reactive power by the reactive power detector QGO of the own unit is operated by the switch SWB when one generator is operated, and the reactive power by the reactive power detector QGA of the other unit is switched by the switch SWB when the generator is operated. As the target reactive power, the above-described voltage correction value is added to the target reactive power, added at the matching point ADD3, and further added at the matching point ADD4, and the active power detector QG
It is added to the reactive power by O. Thus, the correction value is added to the reactive power, and a voltage increase or decrease signal is sent to the AVR from the on / off controller C1 via the gain / dead band adjuster rB.

The switches SWW and SWB are changeover switches for setting the target power to the other unit when the two units are operated and setting the target power to the own unit when the single unit is operated.
When the load decreases and the generator output decreases by, for example, about 50%, the generator power is set to zero so that the load is shifted to the operation shift from two to one or to the operation to stop one. Control switch.

In this way, the active power, the reactive power, the generator voltage and the frequency are detected in each of the power generation facilities No. 1 and No. 2, and the active power and the reactive power of the own power generator and the power During operation, the active power and reactive power of the other unit are used as target values, eliminating the need for a common control panel CC as in the past, making the frequency and voltage of the first and second generators constant even if there is a load fluctuation. (Rated) control, that is, constant FV control, and balance control for balancing the active power (P) and reactive power (Q) of the No. 1 and No. 2 generators are also possible.

Although the above description has been made with respect to the first and second power generation facilities, the same applies to the case of three power generation facilities. No. 1 and No. 3 and No. 2 and No. 2 (own number) may be controlled in combination, such as No. 3 and No. 1. For example, in the case where two cars are operating and No. 3 is stopped, the own machine and the other machine will Can be combined with No. 1 and No. 2, No. 2 and No. 1, and in the case of No. 2 stop, the own No. and the other No. are combined as No. 1 and No. 3 and No. 3 and No. 1, In the case of the stop of No. 1, the own machine and the other machine may be combined as No. 2, No. 3, and No. 3 and so on.

That is, the switches SWW and SWB shown in FIG.
If the combinations described above are combined as described above, three power generation facilities up to the third unit can be applied. And this is of course also applicable to the case of four or more units.

In the above-described embodiment, a sequencer is used for each of the power generating facilities, and the detected active power, reactive power, generator voltage, and generator frequency of each of the units are detected and are present in the generator panel of each of the units. By inputting the data to the sequencer to be executed and transferring the data to the sequencer of the counterpart machine, processing by the same software becomes possible.

[0023]

According to the present invention as described above, the following effects can be obtained. Power control can be performed at each generator panel without the need for a conventional common control panel, thereby reducing the installation area and cost. The same software can be used in the sequencer.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of an embodiment of the present invention.

FIG. 2 is a conventional active power control block diagram.

FIG. 3 is a conventional reactive power control block diagram.

[Explanation of symbols]

 FGS Target frequency setting device FGC Own device frequency detector PGC Own device active power detector PGA Other device active power detector VGS Target voltage VGC Own device voltage QGC Own device reactive power detector QGA Other device reactive power detector ADD1, ADD2 ADD3, ADD4 Addition point SWO, SWW, SWB switch

Claims (4)

[Claims] 1. A deviation between a target frequency and an own-unit frequency is calculated, and the deviation is added to the own-unit active power in the case of one-unit operation and the other-unit active power in the case of a plurality of units, and further, the own-unit active power is calculated. And a power control device for a plurality of power generation facilities, comprising an active power control block for outputting a frequency signal. 2. The deviation between the target voltage and the own unit voltage is calculated,
A reactive power control block that outputs a voltage signal by adding the reactive power of the own unit in the case of single-unit operation and the reactive power of the partner unit in the case of multiple-unit operation and further adding the reactive power of the own unit to this deviation. Power control device for power plant. 3. The power control device for a plurality of power generation facilities according to claim 1, wherein at least one of the active power control block and the reactive power control block is formed by a generator panel. 4. The power control device according to claim 3, wherein the block includes a sequencer having the same software.