CN1862904A - Controlling device and method for power source system and electric power system - Google Patents

Abstract

The disclosed power control method comprises: to power equipment (12), arranging power plant (1) with natural energy and fluctuant power, and a generating equipment (2) with a dual-feed synchronous generator included a frequency-variable converter (5) driven by both a prime mover (3) and electric generator (4) to connect with power system (11), wherein selecting at least one of the total power of (1) and (2) and current signal of (11) as control signal to input the equipment (2) and keep the total power of (1) and (2) constant.

Description

Power-supply system control device and control method, electric power system control device and control method

Technical field

The present invention relates to power-supply system control device, electric power system control device, electric power system control method and electric power system control method, relate in particular to the power-supply system of the load equipment that is used to control the generating equipment that contains the generated output change that utilizes wind-force, sunlight etc. and the frequent change of bearing power or power-supply system control device, electric power system control device, electric power system control method and the electric power system control method of electric power system.

Background technology

Utilize in the existing wind power plant that the energy of wind-force generates electricity, because generated output is pressed the meteorological condition change, the variable speed generator equipment of the band flywheel that can repeat to discharge and recharge in the setting of output side, and according to the output ripple of wind power plant, the output of the variable speed generator equipment of control band flywheel, make the electrical power stabilization of delivering to electric power system or load equipment, pulse free (for example referring to Patent Document 1).

Patent documentation 1: Japan's patent disclosure 2002-285949 communique (claim 3)

To reduce carbon dioxide CO2 in order to prevent global warming from warming up is purpose, and expectation imports the generating equipment of utilizing natural energies such as wind-force and sunlight.Yet, the shortcoming that these generating equipments exist its output to change by meteorological condition.Therefore, this generating equipment is more and more, and then the power quality of whole electric power system makes these bring the setting of the generating equipment of output change to be restricted because of its electric power change reduces down.So the existing wind power plant of recording and narrating in the patent documentation 1 is by making said structure, it is stable that the wind power plant monomer is sought output.Yet, in these structures, though can realize that as the wind power plant monomer high efficiency running and short time electric power change are stable, can not supply with and keep the electric power equilibrium that the electric power that satisfies load that requires under the situation of stand alone generating system of the self power generation power-supply system that makes up other a plurality of generating equipments and load equipment and isolated island etc. maybe can not be sought whole electric power system.

In addition, under the situation of the variable speed generator of band flywheel, thereby also there is the less economical problem of Peacetime Losses driving power.

Under the situation of system with a plurality of generating equipments, sometimes between the power supply change is mended flat, make overall change relax (quantity of establishing wind power plant is n, it is said that the electric power change is generally 1/ √ n), each generating equipment is provided with the problem that there is overcapacity in smoothing apparatus.

Outside the mode that patent documentation 1 is recorded and narrated, also use the mode of electric energy storage devices such as using storage battery, capacitor, but they all exist high price, life-span short, need keep maintenance cost that performance uses, be difficult to guarantee to be provided with problem such as space.

The present invention finishes for addressing the above problem, its purpose is: the good power-supply system control device of a kind of economy, electric power system control device, electric power system control method and electric power system control method are provided, can make the supply and demand state keep balance, also can suppress the amplitude of fluctuation in the power-supply system to the output change of generating equipment, rapid load change simultaneously, make it keep poised state.

Summary of the invention

Power-supply system control device of the present invention, be used to control and possess the 1st generating equipment that the generated output change is set, and the 2nd generating equipment that when carrying out the basis generating, also has the duplex feeding synchronous generator of the changeable frequency field power supply that comprises prime mover and described prime mover driven, and the power-supply system that connects electric power system, comprise: the described the 1st of described power-supply device is connected the input medium that at least one side in the signal of electric current of linkage lines of described electric power system imports as control signal with total generated output value of the 2nd generating equipment with expression, and according to the change of described control signal of input, utilize the control of excitation control and prime mover to make the output variation of described the 2nd generating equipment, thereby make total generated output value of the described the 1st and the 2nd generating equipment keep the control device of setting.

Power-supply system control device of the present invention, be used to control and possess the 1st generating equipment that the generated output change is set, and the 2nd generating equipment that when carrying out the basis generating, also has the duplex feeding synchronous generator of the changeable frequency field power supply that comprises prime mover and described prime mover driven, and the power-supply system that connects electric power system, comprise the described the 1st of described power-supply device is connected the input medium that at least one side in the signal of electric current of linkage lines of described electric power system imports as control signal with total generated output value of the 2nd generating equipment with expression, and according to the change of described control signal of input, utilize the control of excitation control and prime mover to make the output variation of described the 2nd generating equipment, thereby make total generated output value of the described the 1st and the 2nd generating equipment keep the control device of setting; Thereby can provide economy good control, and wherein can make the supply and demand state keep balance, also can suppress the amplitude of fluctuation in the power-supply system to the output change of generating equipment, rapid load change simultaneously, make it keep poised state.

The accompanying drawing summary

Fig. 1 is the pie graph of formation that the power-supply device of embodiment of the present invention 1 is shown.

Fig. 2 is the pie graph that the control circuit in the power-supply device of embodiment of the present invention 1 is shown.

Fig. 3 is the key diagram of running that the power-supply device of embodiment of the present invention 1 is shown.

Fig. 4 is the pie graph of formation that the independent electric power supply of embodiment of the present invention 2 is shown.

Fig. 5 is the pie graph that the formation of the control circuit in the independent electric power supply of embodiment of the present invention 2 is shown.

Fig. 6 is the pie graph of formation that the independent electric power supply of embodiment of the present invention 3 is shown.

Fig. 7 is the pie graph that the formation of the control circuit in the independent electric power supply of embodiment of the present invention 3 is shown.

Fig. 8 is the pie graph of formation that the independent electric power supply of embodiment of the present invention 4 is shown.

Fig. 9 is the pie graph that the formation of the control circuit in the independent electric power supply of embodiment of the present invention 4 is shown.

Figure 10 is the pie graph that the formation of the control circuit in the power-supply system of embodiment of the present invention 5 is shown.

Figure 11 is the pie graph of formation that the power-supply system of embodiment of the present invention 6 is shown.

Figure 12 is the pie graph that the formation of the control circuit in the power-supply system of embodiment of the present invention 6 is shown.

Figure 13 is the pie graph of formation that the power-supply system of embodiment of the present invention 7 is shown.

Figure 14 is the pie graph that the formation of the control circuit in the power-supply system of embodiment of the present invention 7 is shown.

Figure 15 is the pie graph that the formation of the control circuit in the power-supply system of embodiment of the present invention 8 is shown.

Figure 16 is the pie graph of formation that the independent electric power supply of embodiment of the present invention 9 is shown.

Figure 17 is the pie graph that the formation of the control circuit in the independent electric power supply of embodiment of the present invention 9 is shown.

Figure 18 is the pie graph that the formation of the control circuit in the power-supply system of embodiment of the present invention 10 is shown.

Label declaration

1,2,17, the 32nd, generating equipment, the 3rd, prime mover, 3A is prime mover control circuit, the 4th, generator, the 5th, the changeable frequency converter, 5A is the changeable frequency converter control circuit, the 6th, and control device, the 7th, bus, the 8th, checkout gear, the 9th, means of communication, the 10th, circuit breaker is used in link, and the 11st, electric power system, the 12nd, power-supply device, the 13rd, effective power command value, the 14th, mean value operating circuit, 14-1,14-2 is a mean value operating circuit, the 15th, addition and subtraction circuit, 15-1,15-2 is an addition and subtraction circuit, the 16th, and change component testing circuit, 16-1,16-2 is the change component testing circuit, 18,18-1,18-2 is a load equipment, the 19th, voltage transformer, the 20th, independent electric power supply, the 21st, frequency detector, the 22nd, reference frequency, 23, the 24th, gain, the 25th, current transformer, 26, the 28th, the effective power checkout gear, 27, the 29th, means of communication, the 30th, effective power detector, the 31st, addition and subtraction circuit, the 33rd, addition and subtraction circuit, the 34th, voltage detector, 36,36-1,36-2 is a commutation circuit, the 37th, and transtation mission circuit (sine wave), the 38th, operating condition signal, the 39th, signal switching circuit, the 40th, electric energy storage device, the 41st, effective power checkout gear, the 42nd, means of communication, the 43rd, mean value operating circuit, the 44th, addition and subtraction circuit, the 45th, stablize the export target value, the 46th, addition and subtraction circuit.

Embodiment

Execution mode 1

Below, the formation of the power-supply device 12 of embodiment of the present invention 1 is described according to Fig. 1.As shown in Figure 1, generating equipment 1 and generating equipment 2 are set.Generating equipment 1 is for example to utilize the generating equipment of natural energies such as wind-force and sunlight etc., thereby as previously mentioned, though there is the advantage of seeking to reduce the carbon dioxide generating amount, has the character of bringing meteorological condition to cause the output change.Generating equipment 2 is carried out work as the fundamental power supply of power supply, is made of duplex feeding synchronous motor generating equipment (AC excitation type generating equipment).As shown in Figure 1, generating equipment 2 has the control device 6 that diesel engine, gas engine, the hydraulic turbine etc. can be supplied with prime mover 3 of basic electric power, use the generator 4 of the duplex feeding synchronous motor that is driven by prime mover 3, generator 4 is carried out exciting changeable frequency converter 5 (changeable frequency power supply) and changeable frequency converter 5 supplied with control signals.The output of generating equipment 1,2, connection bus 7, and be connected to electric power system 11 with circuit breaker 10 by bus 7 and link.Bus 7 with link with circuit breaker 10 between the checkout gear 2 that detects the electric current flow through circuit breaker 10 is set.Utilize means of communication 9 joint detection devices 8 and control device 6.With checkout gear 8 detected signal apparatus for controlling of supply 6.Like this, power-supply device 12 is power-supply devices with a plurality of generating equipments that each equipment by label 1～10 constitutes.

Actual power-supply device also be provided with generating equipment 1,2 be connected respectively to bus 6 usefulness circuit breaker, adjust the transformer that voltage level uses, the equipment that receiving and transmitting signal is used etc., but the equipment that does not have a direct relation with the present invention is omitted diagram and explanation here.

The generating equipment 2 present 2 that is made of duplex feeding synchronous motor generating equipment is mainly used in the electricity generation system of pumping up water, for example the flat 6-34630 communique of Japan's patent disclosure is illustrated like that, also can be under the state that connects electric power system 11 with specified rotation speed operation in addition, thereby the inertia energy that can utilize prime mover 3 and generator 4 to have, be controlled to by excitation electric power is changed at a high speed, and the output of prime mover 3 is changed.The control method that the present invention relates to utilizes this characteristic to keep the electric power of electric power system requirement in the power-supply device 12 that Fig. 1 constitutes like that, and the output change of generating equipment 1 that reduces generated output change is to the control method of the influence of electric power system 11.

Fig. 2 illustrates the execution mode of control method of the present invention.Among Fig. 2,3 parts shown in Figure 1 are shown: control device 6, checkout gear 8 and means of communication 9.As shown in Figure 2, in control device 6, be provided with mean value operating circuit 14, connect the addition and subtraction circuit 15 of this circuit and be arranged to the change component testing circuit 16 in parallel with mean value operating circuit 14.1 input of addition and subtraction circuit 15 is the signals from mean value operating circuit 14, another input of addition and subtraction circuit 15 is an effective power command value 13, this command value be based in the electric power system utilization that centre feed instruction place or running personnel supply with requirement or with the effective power command value of the deal contract that utilizes the demander of entrusting transmission of electricity.Mean value operating circuit 14 input comes the current signal of self-test device 8, is by the certain hour width mean value computing of this input signal and has the circuit of the calculating input signal mean value that No. 1 delay circuit etc. of stipulated time constant constitutes.Addition and subtraction circuit 15 is to obtain effective power command value 13 and circuit from the deviation of the signal of mean value operating circuit 14.Change component testing circuit 16 is by differential circuit and extracts the circuit that taking-up that the filter circuit etc. of optional frequency component constitutes suppresses required flutter component.

Then, its running is described.When the output of generating equipment 2 was constant, the change of establishing generating equipment 1 makes to be flow through link and changes as the solid line of Fig. 3 (d) with the electric current (linkage lines electric current hereinafter referred to as) of circuit breaker 10.The current signal that comes self-test device 8 of linkage lines electric current carries out current signal mean value computing with corresponding time of response characteristic of prime mover 3 at mean value operating circuit 14, thereby obtains as the mean value shown in the dotted line of Fig. 3 (d).Obtain the output of this mean value operating circuit 14 and the deviation of effective power command value 13 at addition and subtraction circuit 15, then become the signal shown in Fig. 3 (b), and this deviation signal is supplied with prime mover control circuit 3A that is located in prime mover 3.Prime mover control circuit 3A of prime mover 3 controls, and the output that makes prime mover 3 is with this deviation signal increase and decrease, thereby the mean value of linkage lines electric current become effective power command value 13 is arranged.

Equally, the output signal (solid line of Fig. 3 (c)) of change component testing circuit 16 is supplied with changeable frequency converter control circuit 5A in the changeable frequency converter 5 that is located at generating equipment 2.Changeable frequency converter control circuit 5A can carry out high-speed power control by the excitation control of the inertia energy that utilizes prime mover 3 and generator 4 according to this signal, makes electric power change increase and decrease with this, thereby suppresses the pulsation of linkage lines electric current.

Because the linkage lines current detecting postpones and control system delay etc. and residual some changes, but the output control by carrying out prime mover 3 simultaneously and the excitation of changeable frequency converter 5 control, and it is constant that the linkage lines electric current is kept, shown in Fig. 3 (a).Because the linkage lines current detecting postpones and control system delay etc. and can not suppress some changes, utilize to reduce in advance the controlling of output change prediction etc. that these delays or application are taken into the generating equipment of generated output change, can further improve.

In addition, constitute among Fig. 2 the change former state of linkage lines electric current is controlled, but constitute the insensitive interval is set, only making in this change value is that setting is controlled when above, to avoid unnecessary control, so also can obtain same effect.

Among Fig. 2 effective power command value 13 is placed the output side of mean value operating circuit 14, but place the back of the means of communication 9 of linkage lines also can obtain same effect.

When the power-supply device of the generating equipment 2 of overlapping duplex feeding synchronous motor Blast Furnace Top Gas Recovery Turbine Unit (TRT) formation is set more, the command value of capacity that can utilize settings such as central control device at power-supply device to be equivalent to the function of control device 6 and each generating equipment be supplied with the generating equipment that adapts to running is to share mode such as fluctuation component, control, undue burden is fallen on the specific generating equipment.

Among Fig. 3, for the ease of distinguishing running, the mean value component separated fully illustrating with flutter component, but comprise component each other in fact mutually, effect is also identical.That is to say that even comprise flutter component in the mean value component, prime mover can not respond this variation; Otherwise, comprise the mean value component in the flutter component, then inertia energy is limited, and the excitation control of changeable frequency converter 5 can not be stablized additional this change component, thereby carries out the output increase and decrease control of prime mover 3 in the stage that arrives this limit, and effect is identical.About the inertia energy of needs, can consider the pulsation size, suppress effect etc., select the capacity and the quantity of the generating equipment 2 of duplex feeding synchronous motor generating equipment formation, and according to circumstances add flywheel etc., with the inertia energy of need guaranteeing.

In sum, in the present embodiment, generating equipment as power-supply device 12, the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes is set, according to the control of linkage lines electric current change carrying out prime mover 3 and the excitation control of changeable frequency converter 5, thereby can keep electric power system 11 utilization goes up the electric power that requires or based on the electric power that utilizes with the deal contract of the demander of entrusting transmission of electricity, can also suppress the influence of the generating equipment 1 of generated output change simultaneously.

Here, with the input signal of linkage lines electric current as control device 6, but use with each effective power of the generating equipment in the power-supply device 12 as input and with its addition and signal also can bring into play same effect.Fig. 1 illustrates with appearance independently control device 6, but also mean value operating circuit 14, effective power command value 13 and addition and subtraction circuit 15 can be located at prime mover control circuit 3A of prime mover 3, change component testing circuit 16 be located at the changeable frequency converter control circuit 5A of changeable frequency converter 5.

Execution mode 2

Fig. 4 illustrates the formation of the independent electric power supply 20 of execution mode 2.As shown in Figure 4, in the present embodiment, connect load equipment 18, generating equipment 17 and generating equipment 2 on the bus 7.Generating equipment 17 is the combined cycle plants that are made of generated outputs such as wind-force and sunlight generating equipment that changes and the generating equipment with diesel engine prime movers etc.In the present embodiment, in the duplex feeding synchronous motor generating equipment 2, except that the formation of the Fig. 1 with execution mode 1 explanation, voltage transformer (PT) 19 is set also.

Fig. 5 illustrates the formation of control device 6.As shown in Figure 5, control device 6 is provided with frequency detector 21, the mean value operating circuit 14, input that connect this detector are from the addition and subtraction circuit 15 of the signal of mean value operating circuit 14 and reference frequency 22 and gain 23.The change component testing circuit 16 that connects frequency detector 21 also is set, makes it in parallel, and connect gain 24 with mean value operating circuit 14.Illustrate and respectively constitute the unit.Reference frequency 22 is reference frequencies of power-supply system.Gain 23 and 24 is represented respectively the frequency departure signal is considered response, controlled quentity controlled variable (sensitivity), stability etc. so that control electric power and the gain that determines.Mean value operating circuit 14, change component testing circuit 16 and addition and subtraction circuit 15 are described in enforcement mode 1.

Set forth the power-supply device that connects electric power system 11 in the above-mentioned execution mode 1, present embodiment is the independent electric power supply with load equipment of the isolated island that do not connect electric power system etc., as shown in Figure 4.The method that present embodiment 2 relates to is in this independent electric power supply 20, as generating equipment, the generating equipment 2 that interpolation is made of duplex feeding synchronous motor generating equipment, thereby suppress the frequency variation that the unbalanced supply-demands in the power-supply system 20 that the load change because of the output change of generating equipment 17 or load equipment 18 produces cause, power quality is improved.Among Fig. 5, the output signal of frequency detector 21 that detects the frequency of independent electric power supply 20 with mean value operating circuit 14 and 16 pairs of change component testing circuits is carried out signal processing.

Obtain the signal of mean value operating circuit 14 processing and the deviation of reference frequency 22 at addition and subtraction circuit 15, promptly obtain the variation control signal more slowly that is equivalent to load equipment 18 and generating equipment 17, and be transformed into suitable level with gain 23, supply with prime mover control circuit 3A that is located at prime mover 3.When frequency reduces, be equivalent to load factor, thereby control toward the direction of the output that increases prime mover 3 greater than energy output; When frequency raises, opposite with it, toward the direction control of the output that reduces prime mover 3.Thus, the frequency dimension of independent electric power supply 20 can be held in reference frequency 22.

The output of change component testing circuit 16 is supplied with the changeable frequency converter control circuit 5A that is located at changeable frequency converter 5 after also being transformed into suitable level with gain 24.Can utilize the excitation control of the changeable frequency converter 5 that adapts to this signal, the output of the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes is changed at a high speed, thereby the frequency that can suppress the independent electric power supply 20 that the variation owing to load equipment 18 and generating equipment 17 produces is pulsed.Identical when the relation of frequency change direction and electric power increase and decrease direction and above-mentioned control prime mover 3.

Among Fig. 5, reference frequency 22 is placed the output side of mean value operating circuit 14, but also can obtain same effect after placing frequency detector 21.

Even have no adjuster in the generating equipment 17, the equipment of automatic frequency adjustment (AFC) function arranged, also only share normal change electric power and just can obtain same effect with these generating equipments.

Like this, the output control that can be by carrying out prime mover 3 simultaneously and the excitation control of changeable frequency converter 5, the frequency of keeping independent electric power supply 20 is constant.Residual frequency detecting delay, control system delay etc. cause untamed some changes, reduce the control in advance etc. that these delays or application are taken into the output change prediction etc. of the generating equipment of bringing the output change but utilize, and can further improve.

Constitute frequency variation former state with power-supply system among Fig. 5 as input and control, but constitute the insensitive interval is set, only making in this change value is that setting is controlled when above, to avoid unnecessary control, so also can obtain same effect.

When the power-supply device of the generating equipment 2 of overlapping duplex feeding synchronous motor Blast Furnace Top Gas Recovery Turbine Unit (TRT) formation is set more, the command value of capacity that can utilize settings such as central control device at power-supply device to be equivalent to the function of control device 6 and each generating equipment be supplied with the generating equipment that adapts to running is to share fluctuation component or to allow the control of each generating equipment have modes such as falling characteristic (will gain 13,14 be set at suitable value), control, undue burden is fallen on the specific generating equipment.

About the inertia energy of needs, the size that also can consider to pulse, suppress effect etc., select the capacity or the quantity of the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes, and according to circumstances carry out the interpolation etc. of flywheel, with the inertia energy of need guaranteeing.

In sum, in the present embodiment, generating equipment as independent electric power supply 20, the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes is set, carry out the control of prime mover 3 and the excitation control of changeable frequency converter 5 according to the change of power-supply system frequency, the influence of the influence of the generating equipment 17 of inhibition output change and the change of load equipment 18 is kept the equilibrium of supply and demand of independent electric power supply 20, thereby can be kept the power quality of independent electric power supply.

Fig. 5 illustrates with appearance independently control device 6, but also can be with mean value operating circuit 14, addition and subtraction circuit 15 and the 23 prime mover control circuit 3A that are located at prime mover 3 that gain, change component testing circuit 16 and gain 24 are located at the changeable frequency converter control circuit 5A of changeable frequency converter 5.At this moment also can obtain same effect.

Execution mode 3

Fig. 6 illustrates the configuration example of the independent electric power supply 20 of execution mode, and Fig. 7 illustrates the configuration example of control device 6.As shown in Figure 6, in the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes, except that formation, current transformer 25 and means of communication 27 are set also with Fig. 4.The effective power checkout gear 26 of the output (effective power) that detects generating equipment 7 is set between generating equipment 17 and means of communication 27.Means of communication 27 passes to effective power checkout gear 26 detected signals the control device 6 of control appliance 2.The effective power checkout gear 28 and the means of communication 29 thereof of the output (effective power) that detects load equipment 18 are set between load equipment 8 and effective power checkout gear 28.

As shown in Figure 7, effective power detector 30, addition and subtraction circuit 31, mean value operating circuit 14 and change component testing circuit 16 are set in the control device 6.Effective power detector 30 detects the output (effective power) of duplex feeding synchronous motor generating equipment 2.Addition and subtraction circuit 31 always deducts signal from the effective power checkout gear 28 of load equipment 18 from the signal of effective power-sensing circuit 30 and effective power checkout gear 26 sums from generating equipment 17.

The method of controlling according to the deviation of power-supply system frequency and reference frequency shown in the above-mentioned execution mode 2, but the method utilization of present embodiment 3 addition and subtraction circuit 31 in the independent electric power supply 20 as the generated output of generating equipment 2 from the signal of effective power detector 30 and signal sum from effective power checkout gear 26 as the generated output of generating equipment 17 deduct as the effective power (bearing power) of load equipment 18 from the output of effective power checkout gear 28 and output, the deviation that replaces supply frequency and reference frequency, as control signal, control.With the output of this addition and subtraction circuit 31 be controlled to be zero be exactly the generated output that produces in generating equipment 2 and 17 with load equipment 18 in the bearing power that consumes equate that the frequency departure that is equivalent to execution mode 2 is the state of zero (0).Yet, when the generating equipment of using rotating machinery and load equipment are arranged in the power-supply system, even generated output and bearing power produce deviation, also because the inertia energy of these rotating machineries, frequency is not changed immediately, when so execution mode 2 is controlled with frequency departure like that, the start delay of control.Otherwise, under the situation of the method for execution mode 3, the time point start-up control that can change in generated output or bearing power, thereby can further suppress frequency variation littler than execution mode 2, have the advantage that can further improve the power quality of power-supply system.

Constitute among Fig. 6 the input of the output former state of addition and subtraction circuit 31 as mean value operating circuit 14 and change component testing circuit 16, and control, but constitute the insensitive interval is set, only making in this change value is that setting is controlled when above, in order to avoid control unnecessaryly, so also can obtain identical effect.

In addition, be provided with under the situation of power-supply device of the generating equipment 2 that many cover duplex feeding synchronous motor generating equipments constitute, can utilize methods such as sharing fluctuation component according to the capacity of the generating equipment of running to control, undue burden is fallen on the specific generating equipment.

About the inertia energy of needs, the size that also can consider to pulse, suppress effect etc., select the capacity or the quantity of the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes, and according to circumstances carry out the interpolation etc. of flywheel, with the inertia energy of need guaranteeing.

In sum, in the present embodiment, generating equipment as independent electric power supply 20, the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes is set, carry out the control of prime mover 3 and the excitation control of changeable frequency converter 5 according to the deviation of generated output in the power-supply system 20 and bearing power, the influence of the influence of the generating equipment of inhibition output change and the change of load equipment 18 is kept the equilibrium of supply and demand of independent electric power supply 20, thereby can be kept the power quality of independent electric power supply.

Fig. 7 illustrates with appearance independently control device 6, but also can be provided with by the mode of the control circuit of control device that is divided into prime mover 3 and changeable frequency converter 5.

Execution mode 4

In the formation of above-mentioned Fig. 6, under the quantity of load equipment 18 and generating equipment 17 situation how, during the control method of application implementation mode 3, effective power checkout gear and means of communication that need be suitable with each number of devices, equipment high price and complicated simultaneously also may equilibrium of supply and demand collapse when power detection device and means of communication break down.Present embodiment 4 is finished for head it off, implement the basic power-supply system 20 overall equilibrium of supply and demand and electric power pulsation inhibition with the control method of execution mode 2, then utilize the control method of execution mode 3 that the output of the generating equipment 2 of duplex feeding synchronous motor generating equipment formation is changed to big output change and load change in advance, thereby the control method that realizes that economy is good, reliability is high and current-order is high is provided.

Fig. 8 illustrates the configuration example of the independent electric power supply 20 of execution mode 4, and Fig. 9 illustrates the configuration example of control device 6.In the present embodiment 4, as shown in Figure 8, the generating equipment as in the independent electric power supply 20 is provided with generating equipment 32, generating equipment 17 and generating equipment 2.As load equipment, load equipment 18-1 and load equipment 18-2 are set.In generating equipment 17 the effective power checkout gear 26 of the output (effective power) that detects generating equipment 17 is set, and the detected value of effective power 26 is input to the control device 6 of generating equipment 2 by means of communication 27.The effective power checkout gear 28 of the output (effective power) that detects load equipment 18-2 is set among the load equipment 18-2, and the detected value of effective power checkout gear 28 is input to the control device 6 of generating equipment 2 by means of communication 29.The formation of generating equipment 2 is identical with above-mentioned Fig. 6's, thereby omits its explanation here.

The formation of control device 6 then, is described.In the control device 6, the output frequency testing circuit 21 of the voltage transformer 19 of input generating equipment 2 is set.Frequency detection circuit 21 detected power-supply system frequencies are input to mean value operating circuit 14 and change component testing circuit 16-1.Connect the output of input mean value operating circuit 14 and the addition and subtraction circuit 15 of reference frequency 22 on the mean value operating circuit 14.Addition and subtraction circuit 15 connects gain 23.Output to prime mover control circuit 3A input gain 23 of prime mover 3.Change component testing circuit 16-1 connects gain 24.Also be provided with in the control device 6 by means of communication 27 input be located at generating equipment 17 effective power checkout gear 26 output and be located at the addition and subtraction circuit 31 of output of the effective power checkout gear 28 of load equipment 18-2 simultaneously by means of communication 29 inputs.The output of addition and subtraction circuit 31 is connected to change component testing circuit 16-2.The addition and subtraction circuit 33 of the output of input output of described gain 24 and change component testing circuit 16-2 is set, to obtain these output sums again.The output of addition and subtraction circuit 33 is input to the changeable frequency converter control circuit 5A of the changeable frequency converter 5 of generating equipment 2.

Then, its running is described.In the formation of Fig. 8, generating equipment is divided into equable generating equipment 32 and main and change big generating equipment 17, load equipment is divided into equable load equipment 18-1 and main and change big load equipment 18-2.Only will be main and change the generated output of big generating equipment 17 and load equipment 18-2 and bearing power as control signal, respectively by effective power checkout gear 26 and 28 and means of communication 27 and 29 be input to the control device 6 of the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes.

Constitute the control device 6 of generating equipment 2 as shown in Figure 9, thereby with detected power-supply system frequency in voltage transformer 19 and the frequency detector 21, in prime mover control circuit 3A of prime mover 3, control with mean value operating circuit 14, reference frequency 22, addition and subtraction circuit 15 and 23 the output of gaining.Detected power-supply system frequency in voltage transformer 19 and the frequency detector 21 is input to gain 24 by change component testing circuit 16-1.Will from the effective power checkout gear 26 that is located at main and big generating equipment 17 and load equipment 18-2 and 28 and the signal of means of communication 27 and 29 be input to addition and subtraction circuit 31.The signal of will making plus and minus calculation in the addition and subtraction circuit 31 and getting is input to change component testing circuit 16-2.To be input to addition and subtraction circuit 33 from the signal of change component testing circuit 16-2 with from the signal of gain 24, and the changeable frequency converter control circuit 5A of the changeable frequency converter 5 of generating equipment 2 use addition and subtraction circuit 33 with these signal plus and signal carry out excitation control.

Be formed in the control in advance of adding in the execution mode 2 mainly and changing the electric power variation of big generating equipment 17 and load equipment 18-2 like this, thereby can further reduce the pulsation of power-supply system frequency than execution mode 2, can also realize simultaneously than the execution mode 3 simple and good power-supply systems of economy.

Among Fig. 9 reference frequency is placed the output side of mean value operating circuit 14, but place the back of frequency detector 21 also can obtain same effect.

Be illustrated as the mode of controlling the signal of usefulness in advance with the power signal of will be main and changing big generating equipment and load equipment, but in order further to improve economy etc., the power quality that also can be as requested and the size of change select to detect the generating equipment and the load equipment of effective power signal.

In sum, according to present embodiment, carry out the output control of prime mover 3 and the excitation control of changeable frequency converter 5 simultaneously, thereby can make the frequency of power-supply system keep constant.Because of frequency detecting postpones and control system postpones untamed some changes, utilize the delay that reduces these changes or use in advance the controlling of prediction etc. that is taken into the output change of generating equipment along with the output change, can further improve.

Here, be illustrated, but also can add together form, realize having concurrently the effect in advance controlled and the control of high reliability by being taken as form with the form of execution mode 2 and execution mode 3 as control in advance.

Formation changes former state as importing and controlling with the electric power of frequency variation, generating equipment 7 and the load equipment 18-2 of power-supply system among Fig. 8, but constitute the insensitive interval is set, only making in this change value is that setting is controlled when above, to avoid unnecessary control, so also can obtain same effect.

In addition, when the power-supply device of the generating equipment 2 of overlapping duplex feeding synchronous motor Blast Furnace Top Gas Recovery Turbine Unit (TRT) formation is set more, can utilize settings such as central control device to be equivalent to the function of control device 6 and each generating equipment is supplied with the command value of the capacity that adapts to the generating equipment that turns round to share fluctuation component or to allow the control of each generating equipment have methods such as falling characteristic at power-supply device, control, undue burden is fallen on the specific generating equipment.

About the inertia energy of needs, also can consider pulsation size, suppress effect etc., select the capacity or the quantity of the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes, and according to circumstances carry out the interpolation etc. of flywheel, with the inertia energy of need guaranteeing.

Fig. 8 illustrates independently appearance to control device 6, but also can be divided into prime mover control circuit 3A of prime mover 3 and the changeable frequency converter control circuit 5A of changeable frequency converter 5 is provided with.

Execution mode 5

Be used for the method that control in advance improves the power quality of power-supply system by the power that will change big generating equipment 17 and load equipment 18-2 shown in the execution mode 4, but in order further to improve economy, in the present embodiment 5, as shown in figure 10, the example utilization of the control method that illustrates be when generated output and bearing power change, by variations such as electric current and phase places, the voltage that makes bus 7 is transient change roughly.

The formation of the control device 6 of present embodiment shown in Figure 10 is described.Frequency detector 21 and the voltage detector 34 of input from the signal of voltage transformer 19 is set in parallel.Mean value operating circuit 14 and the change component testing circuit 16-1 of input from the signal of frequency detector 21 is set in parallel.The output of input mean value operating circuit 14 and the addition and subtraction circuit 15 of reference frequency are set again, and connect gain 23 in the output of addition and subtraction circuit 15.The output of gain 23 is input to prime mover control circuit 3A.In the output of change component control circuit 16-1, connect gain 24.On importing, connect change component testing circuit 16-2 from the voltage of signals detector 34 of voltage transformer 19.On change component testing circuit 16-2, connect gain 35.The output of gain 34 and gain 35 is input to addition and subtraction circuit 33, obtains their sums.The output of addition and subtraction circuit 33 is input to changeable frequency converter 5A.

Then, its running is described.In the present embodiment, will be input to voltage detector 34, to replace the generating equipment in the above-mentioned execution mode 4 and the effective power of load equipment from the signal of voltage transformer 19.Detect the voltage of power-supply system in the voltage detector 34, thereby the output of this voltage detector 34 is input to change component testing circuit 16-2, after with gain 35 this output transform being become suitable level, carry out plus and minus calculation in the addition and subtraction circuit 33 and the output of gain 24.Other running is identical with execution mode 4.Generated output to the change direction that system voltage changes is: the generated output in the independent electric power supply is during greater than bearing power, system voltage raises, otherwise then this voltage descends, thereby system voltage when raising generated output reduce, generated output strengthened when system voltage reduced.

In sum, in the present embodiment, the method of being got is imported the output of the voltage detector 34 of the voltage that detects power-supply system from voltage transformer 19, thereby can omit effective power checkout gear 26 and 28 among Fig. 8, voltage transformer (PT) only is set gets final product, have the effect that the economy of making further improves.

Execution mode 6

Figure 11 illustrates the configuration example of the power-supply system 20 of present embodiment, and Figure 12 illustrates the circuit configuration example of control device 6.The power-supply system that present embodiment 6 explanation comprises a plurality of generating equipments 17 and load equipment 18 is connected to electric power system 11 by link with circuit breaker 10, and the control method when this system carried out formation that electric power receives and dispatches.Figure 12 illustrates and constitutes link with the method for execution mode 1 and be the control of closure state with circuit breaker 10, constitutes link with circuit breaker 10 disconnections and be the situation of the control of independent electric power supply state with the method for execution mode 2.Certainly, also can obtain same effect with execution mode 3～5 formations.

As shown in figure 11, on bus 7, connect a plurality of generating equipments 17 and load equipment 18.Among Figure 11, simplify, respectively one of generating equipment 17 and load equipment 18 is shown respectively in order to make figure.Duplex feeding synchronous motor generating equipment 2 is connected on the bus 7.Bus 7 is connected to electric power system 11 by link with circuit breaker 10.Flow through the checkout gear 8 of the electric current that links usefulness circuit breaker 10 with setting between circuit breaker 10 and the bus 7 in link.Checkout gear 8 detected current signals are input to control device 6 by means of communication.The formation of generating equipment 2 is identical with Fig. 4 basically.But in the formation of Figure 11, with the difference of Fig. 4 be: the input expression link signal with the on off operating mode of circuit breaker 10 in the control device 6, also imports the current signal of self-test device 8.

As shown in figure 12, in the control device, the mean value operating circuit 14-1 and the change component testing circuit 16-1 of the current signal of input communication means 9 transmissions is set in parallel.The output of input mean value operating circuit 14-1 and the addition and subtraction circuit 15-1 of effective power command value 13 also are set.The output of addition and subtraction circuit 15-1 is input to commutation circuit 36-1 as input B, and the output D of commutation circuit 36-1 then is input to prime mover control circuit 3A.On the other hand, will be input to commutation circuit 36-2 as input B from the output of change component testing circuit 16-1, the output D of commutation circuit 36-2 then is input to changeable frequency converter control circuit 5A.The frequency detector 21 of input from the signal of voltage transformer 19 also is set in control device 6.Mean value operating circuit 14-2 and the change component testing circuit 16-2 of input from the signal of frequency detector 21 is set in parallel.Input is set from the signal of mean value operating circuit 14-2 and the addition and subtraction circuit 15-2 of reference frequency 22.Addition and subtraction circuit 15-2 connects gain 23, and the output of gain 23 is input to commutation circuit 36-1 as input C.The output of change component testing circuit 16-2 is connected to gain 24, and the output of gain 24 then is input to commutation circuit 36-2 as input C.

Commutation circuit 36-1 and 36-2 are the commutation circuits of switching the signal of delivering to prime mover control circuit 3A and changeable frequency converter control circuit 5A according to link with the on off operating mode of circuit breaker 10.When if each commutation circuit 36-1 and 36-2 use circuit breaker 10 conductings (closure) in link, the signal of input " 1 " is as input A, the signal of input " 0 " is as input A when blocking-up (disconnection), then the output D of this commutation circuit 36-1 and 36-2 respectively when A=" 1 " (during conducting state) switch to D=B, (during blocking state) switches to D=C when A=" 0 ".Promptly, when link is conducting state with circuit breaker 10, be controlled to checkout gear 8 detected current signals and carry out the control of prime mover 3 and the excitation control of changeable frequency converter 5, thereby electric power system 11 eliminated the influence that the load change of the output change of generating equipments 17 and load equipment 18 is given electric power system 11, make the electric power transmitting-receiving keep setting; On the other hand, link disconnects because of electric power system 11 sides' fault etc. with circuit breaker 10, and when translating into independent electric power supply, controlled electricity consumption pressure transformer 19 and the frequency detector 21 detected power-supply system frequencies made are carried out the control of prime mover 3 and the excitation control of changeable frequency converter 5, thereby frequency is constant, just keeps equilibrium of supply and demand state.

In sum, in the present embodiment, the commutation circuit 36-1 and the 36-2 that switch the signal of delivering to prime mover control circuit 3A and changeable frequency converter control circuit 5A according to link with the "on" position of circuit breaker 10 are set, when link is conducting state with circuit breaker 10, be controlled to the influence that the load change of the output change of generating equipments 17 and load equipment 18 is given electric power system 11 is eliminated in electric power system 11, make the electric power transmitting-receiving keep setting, disconnect linking because of electric power system 11 side's faults etc. with circuit breaker 10, and when translating into independent electric power supply, it is constant also to be controlled to frequency, promptly keep equilibrium of supply and demand state, thereby can realize high reliability, high-quality power-supply system.

Execution mode 7

The generating equipment 2 that the duplex feeding synchronous motor generating equipment of the generating equipment 17 of the control method that execution mode 7 relates to decentralized configuration electric power change in electric power system 11 and the change electric power equilibrium of capacity and load equipment 18-2 constitutes, the total power value that becomes generating equipment 1, load equipment 18-2 and the generating equipment 2 of object is kept the effective power command value 13 that centre feed instruction place provides, and pulsation is reduced.

The formation of the electric power system of present embodiment shown in Figure 13, Figure 14 then illustrates the formation of control device 6.Electric power system 11 connects generating equipment 1,2,17.Also connect load equipment 18-1,18-2 simultaneously.The effective power of generating equipment 1 is supplied with the control device 6 of generating equipment 2 by effective power checkout gear 26 and means of communication 27.Again the effective power of load equipment 18-2 is supplied with the control device 6 of generating equipment 2 by effective power checkout gear 28 and means of communication 29.

In control device 6, input is set from the signal of voltage transformer 19 with from the effective power checkout gear 30 of the signal of current transformer 25.Input is set from the signal of effective power detector 30 and the addition and subtraction circuit 31 of means of communication 27 and the 29 effective power signals that send again.The mean value operating circuit 14 and the change component testing circuit 16 of the output of input addition and subtraction circuit 31 are set in parallel.The addition and subtraction circuit 15 of input from the output and the effective power instruction 13 of mean value operating circuit 14 is set again.The output of addition and subtraction circuit 15 is input to prime mover control circuit 3A.On the other hand, the output with change component testing circuit 16 is input to changeable frequency converter control circuit 5A.

Its running is described.In the control device 6, plus and minus calculation is carried out in the output of the generating equipment 2 that effective power signals that send in 31 pairs of means of communication 27 of addition and subtraction circuit and 29 and effective power detector 30 detected duplex feeding synchronous motor generating equipments constitute, and calculates aggregate values.This aggregate values is supplied with mean value operating circuit 14 and change component testing circuit 16, addition and subtraction circuit 15 with the output of mean value operating circuit 14 as with deviation signal from the effective power command value 13 of centre feed instruction place etc., be input to prime mover control circuit 3A of prime mover 3.On the other hand, the output of change component testing circuit 16 is supplied with the changeable frequency converter control circuit 5A of changeable frequency converter 5.

Therefore, control prime mover 3 makes the average power of these generating equipments 1 and load equipment 18-2 keep effective power command value from centre feed instruction place etc., and utilizes the excitation control of changeable frequency converter 5 to suppress change component such as pulsation.The output control that can be by carrying out these prime mover 3 simultaneously and the excitation control of changeable frequency converter 5 make the total performance number of object generating equipment and load equipment keep command value.

Frequency detecting delay, control system delay etc. cause untamed some changes, utilize to reduce the control in advance etc. that these delays or application are taken into the output change prediction etc. of the generating equipment of bringing the output change, can further improve.Constitute frequency variation former state with power-supply system among Figure 14 as input and control, but constitute the insensitive interval is set, only making in this change value is that setting is controlled when above, to avoid unnecessary control, so also can obtain same effect.

Among Figure 14 effective power command value 13 is placed the output side of mean value operating circuit 14, but place the back of addition and subtraction circuit 15 also can obtain same effect.

In addition, when the power-supply device of the generating equipment 2 of overlapping duplex feeding synchronous motor Blast Furnace Top Gas Recovery Turbine Unit (TRT) formation is set more, the command value of capacity that can utilize settings such as central control device at power-supply device to be equivalent to the function of control device 6 and each generating equipment be supplied with the generating equipment that adapts to running is to share method such as fluctuation component, control, undue burden is fallen on the specific generating equipment.

About the inertia energy of needs, the size that also can consider to pulse, suppress effect etc., select the capacity or the quantity of the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes, and according to circumstances carry out the interpolation etc. of flywheel, with the inertia energy of need guaranteeing.

In sum, in the present embodiment, generating equipment as electric power system 11, the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes is set, carry out the control of prime mover 3 and the excitation control of changeable frequency converter 5 according to the change of object generating equipment and load equipment, thereby can keep the electric power that requires in the utilization of electric power system 11, can also suppress simultaneously to export the influence of the generating equipment 1 of change.

Also can utilize grading control, use whole electric power system is divided into a plurality of groups that comprise generating equipment and load equipment, use control method of the present invention for every group, suppress the electric power pulsation in each group, and become command value, thereby obtain the electric power system equilibrium of supply and demand from centre feed instruction place.That is, can in each group, handle each generating equipment of organizing the output change that exists and the influence of load equipment, thereby whole electric power system utilization is convenient.Here set forth and only effective power control has been divided into how group is controlled, but can be unit too with the group and voltage adjustment equipment is set therein voltage, carry out the voltage control of voltage instruction value that centre feed instruction place etc. is provided, thereby carry out grading control.

Figure 14 illustrates with appearance independently control device 6, but also can be divided into prime mover control circuit 3A of prime mover 3 and the changeable frequency converter control circuit 5A of changeable frequency converter 5 is provided with.

Execution mode 8

In the above-mentioned execution mode 2～6, its prerequisite is: have the phase place and the frequency reference of the generating equipment 2 independent operation generating equipment in addition that is used for duplex feeding synchronous motor generating equipment formation during independent electric power supply, promptly have the phase place and the frequency reference of changeable frequency converter 5 usefulness of control generating equipment 2.Yet when the generating equipment of this independent operation stopped, this generating equipment 2 becomes did not have the control benchmark, can not proceed frequency lifting running.Present embodiment 8 is used to avoid this state, its configuration example shown in Figure 15.

The generation circuit 37 and the signal shifter 36 of the reference signal that produces control frequency variable inverter 5 usefulness are set in signal switching circuit 39 as shown in figure 15.In the signal shifter 36,, import the operating condition signal 38 of other generating equipment, also import simultaneously from the signal of voltage transformer 19 with from the reference signal of transtation mission circuit 37 as input A, respectively as input B and input C, and output signal output D.

Then, its running is described.Other generating equipment operating condition signal 38 when the generating equipment of the independent operation that the benchmark that can become power-supply system is arranged, A=" 1 ", when not having this equipment, A=" 0 ".The D=B when function that signal shifter 36 has switches to A=" 1 " with output signal D, D=C during A=" 0 ".When the generating equipment of independent operation was arranged, A=" 1 " was from the voltage signal of voltage transformer 19 selection power-supply systems, as the output signal D of signal shifter 36.Supply with this signal, as to the control of the excitation of changeable frequency converter 5 and the phase place of prime mover control and the reference signal of frequency, thereby generating equipment 2 can remain in operation, and has nothing to do with the operating condition of other generating equipment.

Among Figure 15 signal switching circuit 39 is illustrated as independent circuits, also can bring into play same effect but this circuit is included in the control circuit of changeable frequency converter 5.

Under the situation that frequency etc. is different when signal switches, the impact when switching in order to alleviate can be provided with the function that the value before switch gradually changes.

The generating equipment 2 that constitutes at the duplex feeding synchronous motor of the time point running of the generating equipment of no independent operation has under a plurality of situations, and each transtation mission circuit 37 has error, then might produce contention electric power between the generating equipment, can not steady running.Therefore, can make that only to make from the operating condition signal of the relevant generating equipment 2 of selections such as supply and demand control device according to relative importance value be A=0, or in the shared control device of supply and demand control device etc. signalization commutation circuit 39, the changeable frequency converter 5 of each generating equipment 2 is supplied with reference signals.

Execution mode 9

Above-mentioned execution mode 1～8 can be used to such an extent that have nothing to do with electric energy storage devices such as no storage battery and flywheel are arranged, but is preferably under the situation with electric energy storage device, considers the utilization of its life-span and efficient.Present embodiment is finished by this viewpoint, thereby all available in the above-mentioned execution mode 1～8.Figure 16 illustrates the overall configuration example of the independent electric power supply 20 of present embodiment, and Figure 17 illustrates the configuration example of control device 6.The formation of Figure 16 formation with Fig. 6 basically is identical.But among Figure 16, electric energy storage devices 40 such as storage battery or flywheel are set also, detect the effective power checkout gear 41 of power of electric energy storage device 40 and the means of communication 42 of effective power checkout gear 41 detected signals being passed to changeable frequency converter 5 usefulness of the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes.

In the following explanation, storage battery as electric energy storage device 40, is operated and effect with the example explanation of carrying out ac-dc conversion in the power converter.Electric energy storage device 40 discharges electric power (discharge) or absorbs electric power (charging) from storage battery according to the change of this electric power or frequency in power-supply system during electric power variation, thus the frequency variation of inhibition power-supply system.Yet, under the situation of storage battery, continuous for the state that makes long-time discharge or charging, need jumbo storage battery, also produce simultaneously and discharge and recharge the efficient that the lost of life, the storage battery loss when discharging and recharging and the power converter loss that cause cause repeatedly greatly and reduce.

That is, the high speed charge-discharge performance that brings by the combination that effectively utilizes storage battery and power converter conversely speaking, is defined as the short time change of blanketing frequency with its task, can address the above problem.

Figure 17 is the figure that control device 6 configuration examples of present embodiment 9 are shown, wherein in Fig. 7 of the control circuit configuration example that execution mode 3 is shown, also add the effective power detect electric energy storage device effective power checkout gear 41, send means of communication 42 from the effective signal of power detection device 41, computing from the signal of means of communication 42 at the appointed time the mean value of width mean value operating circuit 43 and to from mean value operating circuit 14 with carry out the addition and subtraction circuit 44 of plus and minus calculation from the signal of mean value operating circuit 43.

At first, the movement under the situation of the control circuit configuration example of key diagram 7.Under the situation of Fig. 7; when electric energy storage device 40 is arranged; be included on the structure in the part of generating equipment 17; thereby the generating equipment 17 of power-supply system and load equipment 18 is when producing the electric power change; in order to suppress this change; short change component of cycle and change component normal or that the cycle is long are used to control from prime mover 3 of the output of the excitation control of the generator 4 of signal in changeable frequency converter 5 of change component testing circuit 16 and mean value operating circuit 14 respectively, suppress this change.At this moment, even it is continuous prime mover 3 not to be controlled to electric energy storage device 40 charging and discharging states, also making its power is zero (0), thereby controlling party makes electric energy storage device 40 itself stop to discharge and recharge on the time point that is this state continuance and the capacity limitation that arrives electric energy storage device 40, and the output of mean value operating circuit 14 changes, with the output of control prime mover 3.Owing to reach capacity, can not suppress the control of this change when continuing to produce change at this time point electric energy storage device 40.In contrast, among Figure 17 by effective power checkout gear 41, means of communication 42 mean value operating circuit 43 with the charging and discharging state apparatus for controlling of supply 6 of electric energy storage device 40, with the signal of computing in the mean value operating circuit 14 at addition and subtraction circuit 44 control prime mover 3.Controlling party is discharged when output to can be electric energy storage device 40, and the output of prime mover 3 is increased, and the output of prime mover 3 reduces during charging.

Like this, the state that electric energy storage device 40 discharges and recharges continuously or excessively discharges and recharges can be prevented to form, the good power-supply system of economy, power-supply device can be realized.

Electric energy storage device 40 also can add to be needed charging and be used to it be supplied with functions such as charge power from signal controlling prime mover 3 of electric energy storage device 40 when not controlling prime mover 3 or needing charging when the charging direction.

When having the device of function of power-supply systems such as having the whole supply and demand control device of monitoring, power-supply device, the generating equipment 17 that comprises the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes is supplied with command value, the charging and discharging state of electric energy storage device 40 in this device is not continued, also can obtain same effect.

Otherwise, the control device of electric energy storage device 40 is only responded to short change component of cycle, also can obtain same effect.

Execution mode 10

In the above-mentioned execution mode 1～9, the method for long fluctuation component of the normal fluctuation component of control adjustment of the prime mover 3 that utilizes the generating equipment 2 that duplex feeding synchronous motor generating equipment constitutes or cycle is shown.Yet under the bound situation of the energy of generating equipment 2, quantity or operation range, when turning round near its limiting value, this limiting value restriction output suppresses the often non-effective work of control of electric power change.The control circuit that present embodiment 10 relates to is configured in having the power-supply system of a plurality of generating equipments, current flow devices, makes the output of the generating equipment 2 of duplex feeding synchronous motor generating equipment formation always keep optimum state.Figure 18 illustrates the configuration example of its control device 6.

As shown in figure 18, in the control device 6 of present embodiment, input is set from the signal of voltage transformer 19 with from the effective power detector 30 of the signal of current transformer 25, input is from the mean value operating circuit 14 and the addition and subtraction circuit 46 to carrying out plus and minus calculation from the signal and the stable export target value 45 of mean value operating circuit 14 of the mean value of the signal of effective power detector 30 and computing stipulated time width.To be input to other generating equipment as output increase and decrease instruction from the signal of addition and subtraction circuit 46.

Its running is described.Detect the output of the generating equipment 2 of duplex feeding synchronous motor generating equipment formation at effective power detector 30, and obtain the mean value of stipulated time width at mean value operating circuit 14.In addition and subtraction circuit 46, calculate the deviation of this mean value and stable export target value 45.Stablizing export target value 45 is to use the generating equipment 2 of duplex feeding synchronous motor generating equipment formation well and be used for absorbing the change target value set effectively for efficient.The deviation signal that addition and subtraction circuit 46 is calculated is supplied with other generating equipment as output increase and decrease signal.

When producing the change on generating equipment, the load equipment in power-supply system, the power-supply device, the control of the generating equipment 2 that constitutes with the duplex feeding synchronous motor generating equipment shown in the execution mode 1～9 suppresses this change, keeps power-supply system frequency or linkage lines electric current.The result, the output of generating equipment 2 becomes the state that turns round by the value different with stable export target value 45, might when producing next change, can not suppress this change, thereby according to the 30 detected actual output increases and decreases that make other generating equipment with the deviation of stable export target value 45 of exporting of effective power detector, keep the generating equipment generated output of power-supply system, power-supply device, also the output of the generating equipment 2 of stable state is maintained simultaneously and stablize export target value 45.

Being configured among Figure 18 control from the deviate former state of addition and subtraction circuit 46, but constitute insensitive interval etc. being set, is that setting is controlled when above in this change value only, to avoid unnecessary control, so also can obtain same effect.Figure 18 illustrates with appearance independently control device 6, but also they can be located in the control device of prime mover 3.

Have under the situation of power-supply system, power-supply device of a plurality of generating equipments, the function suitable with control device 6 is set in the supply and demand control device of power-supply system, power-supply device etc., and the command value that each generating equipment is distributed each capacity of the generating equipment that adapts to running, thereby the controlled undue burden of making is not fallen on the specific generating equipment.At this moment, the slow and distribution method that is difficult to help high efficiency operation point generating equipment, that consider each generating equipment that suppresses to change and distributes etc. of also available preferential control response.

Claims (17)

1. power-supply system control device, be used to control the 1st generating equipment that possesses the generated output change and the 2nd generating equipment that when carrying out the basis generating, also has the duplex feeding synchronous generator of the changeable frequency field power supply that comprises prime mover and described prime mover driven, and the power-supply system that connects electric power system, it is characterized in that, comprise

With described power-supply device the described the 1st with total generated output value of the 2nd generating equipment is connected with expression input medium that at least one side in the signal of electric current of linkage lines of described electric power system imports as control signal and

According to the change of described control signal of input, utilize excitation control and prime mover control to make the output variation of described the 2nd generating equipment, thereby make total generated output value of the described the 1st and the 2nd generating equipment keep the control device of setting.

2. power-supply system control device, be used to control the 1st generating equipment that possesses the generated output change and the 2nd generating equipment of the duplex feeding synchronous generator that when carrying out the basis generating, also has the changeable frequency field power supply that comprises prime mover and described prime mover driven and the power-supply system that is not connected electric power system that possesses the load equipment that consumes electric power, it is characterized in that, comprise

With the frequency of described power-supply system as the input medium of control signal input and

According to the variation of the described control signal of importing, utilize excitation control and prime mover control that the output of described the 2nd generating equipment is changed, thereby suppress the control device of the frequency variation of described power-supply system.

3. power-supply system control device, be used to control the 1st generating equipment that possesses the generated output change,

Also having the changeable frequency that comprises prime mover and described prime mover driven when carrying out the basis generating encourages

The 2nd generating equipment of the duplex feeding synchronous generator in magnetoelectricity source and the load that possesses consumption electric power

The power-supply system that does not connect electric power system of equipment is characterized in that, comprises

Import the effective power of the effective power of described the 1st generating equipment and described load equipment input medium,

The control signal that the summation of these effective power values of input is produced as control signal produce means and

According to the variation of the described control signal that produces, utilize excitation control and prime mover control that the output of described the 2nd generating equipment is changed, thereby suppress the control device of the frequency variation of described power-supply system.

4. the power-supply system control device described in claim 3 is characterized in that,

Constitute described the 1st generating equipment by a plurality of generating equipments, and these generating equipments are divided into equable generating equipment and main and change big generating equipment;

Constitute described load equipment by a plurality of load equipments, and these load equipments are divided into equable load equipment and main and change big load equipment;

The input of described input medium is as described main and change the described generating equipment that big generating equipment and load equipment select and the effective power of described load equipment;

Described control signal generation means are added to described main and summation that change the effective power value of big generating equipment and load equipment in the frequency signal, to produce described control signal;

Described control device utilizes excitation control and prime mover control that the output of described the 2nd generating equipment is changed according to the variation of control signal, thereby suppresses the frequency variation of described power-supply system.

5. power-supply system control device, the 2nd generating equipment of the duplex feeding synchronous generator that be used to control the 1st generating equipment that possesses generated output change, when carrying out the basis generating, also has the changeable frequency field power supply that comprises prime mover and described prime mover driven and the power-supply system that is not connected electric power system that consumes the load equipment of electric power, it is characterized in that, comprise

With the frequency of described power-supply system as the input medium of control signal input and

According to the variation of the described control signal of importing, utilize excitation control and prime mover control that the output of described the 2nd generating equipment is changed, thereby suppress the control device of the frequency variation of described power-supply system,

Described control device also has the 2nd input medium that the voltage of described power-supply system is imported as the 2nd control signal, and

Described control device adds the variation of the value that obtains after described the 2nd control signal according to described control signal, carries out described excitation control and described prime mover and controls.

6. power-supply system control device, the 2nd generating equipment of the duplex feeding synchronous generator that be used to control the 1st generating equipment that possesses generated output change, when carrying out the basis generating, also has the changeable frequency field power supply that comprises prime mover and described prime mover driven and the power-supply system that is not connected electric power system that consumes the load equipment of electric power, it is characterized in that, comprise

Import the effective power of the effective power of described the 1st generating equipment and described load equipment input medium,

The control signal that the summation of these effective power values of input is produced as control signal produce means and

According to the variation of the described control signal that produces, utilize excitation control and prime mover control that the output of described the 2nd generating equipment is changed, thereby suppress the control device of the frequency variation of described power-supply system,

Described control device also has the 2nd input medium that the voltage of described power-supply system is imported as the 2nd control signal, and

Described control device adds the variation of the value that obtains after described the 2nd control signal according to described control signal, carries out described excitation control and described prime mover and controls.

7. the power-supply system control device described in claim 6 is characterized in that,

Constitute described the 1st generating equipment by a plurality of generating equipments, and these generating equipments are divided into equable generating equipment and main and change big generating equipment;

Constitute described load equipment by a plurality of load equipments, and these load equipments are divided into equable load equipment and main and change big load equipment;

The input of described input medium is as described main and change the described generating equipment that big generating equipment and load equipment select and the effective power of described load equipment;

Described control signal generation means are added to described main and summation that change the effective power value of big generating equipment and load equipment in the frequency signal, to produce described control signal;

Described control device utilizes excitation control and prime mover control that the output of described the 2nd generating equipment is changed according to the variation of control signal, thereby suppresses the frequency variation of described power-supply system.

8. power-supply system control device, be used to control the 1st generating equipment that possesses the generated output change, the 2nd generating equipment and the load equipment that when carrying out the basis generating, also has the duplex feeding synchronous generator of the changeable frequency field power supply that comprises prime mover and described prime mover driven, and the power-supply system that connects electric power system, it is characterized in that, comprise

The described power-supply system of input expression whether connect described Circuits System the connection status signal the connection status input medium and

The control device of carrying out the output control of described the 2nd generating equipment according to the described connection status signal of input,

Described control device is judged as described power-supply system when connecting described electric power system according to described connection status signal, the described the 1st of described power-supply device is imported as control signal with at least one side that the total generated output value of the 2nd generating equipment and the difference of the effective power of load equipment are connected with expression in the signal of electric current of linkage lines of described Circuits System, change according to described control signal, utilize excitation control and prime mover control that the output of described the 2nd generating equipment is changed, thereby make total generated output value of the described the 1st and the 2nd generating equipment keep setting, and

Be judged as described power-supply system when not connecting described Circuits System, either party or both sides in the difference of the effective power of the generated output of the frequency of described power-supply system and described generating equipment and described load equipment are imported as control signal, variation according to described control signal, utilize excitation control and prime mover control that the output of described the 2nd generating equipment is changed, thereby suppress the frequency variation of described power-supply system.

9. electric power system control device, be used to control the generating equipment that possesses the generated output change and contain prime mover and the electric power system of the duplex feeding synchronous motor generating equipment of the capacity equilibrium of the changeable frequency field power supply of described prime mover driven and capacity and described generating equipment, it is characterized in that, comprise

Import described generating equipment generated output input medium and

Generated output according to the described generating equipment of importing, utilize the control of excitation control and prime mover to make the output variation of described duplex feeding synchronous motor generating equipment, also make the effective power summation of described generating equipment and described duplex feeding synchronous motor generating equipment keep the control device of setting simultaneously thereby reduce the influence that described generating equipment changes to described electric power system.

10. power-supply system control device, the 2nd generating equipment of the duplex feeding synchronous generator that be used to control the 1st generating equipment that possesses generated output change, when carrying out the basis generating, also has the changeable frequency field power supply that comprises prime mover and described prime mover driven and the power-supply system that is not connected electric power system that possesses the load equipment that consumes electric power, it is characterized in that, comprise

Input expression whether have the generating equipment beyond the duplex feeding synchronous generator running signal input medium and

Control device, this control device is according to the described signal of input, when the generating equipment beyond the duplex feeding synchronous generator is arranged in being judged as described power-supply system, the voltage of described power-supply system is used as the frequency of excitation control and the reference signal of phase place, and in described power-supply system during the generating equipment beyond the no dual feed synchronous generator, pre-prepd signal is used as reference signal, utilize excitation control and prime mover control that the output of described duplex feeding synchronous motor generating equipment is changed, thereby, still proceed stable running no matter whether there is the generating equipment beyond the duplex feeding synchronous generator to turn round.

11. as each described power-supply system control device in claim 1 to 8 or 10, it is characterized in that,

Described power-supply system has electric energy storage device;

Described control device is imported the output of described electric energy storage device as the 3rd control signal, according to described the 3rd control signal the output of described the 2nd generating equipment is changed, thereby avoids described electric energy storage device that long-time charging and discharging state is continued.

12. the electric power system control device described in claim 9 is characterized in that,

Described electric power system has electric energy storage device;

Described control device is imported the output of described electric energy storage device as the 3rd control signal, according to described the 3rd control signal the output of described the 2nd generating equipment is changed, thereby avoids described electric energy storage device that long-time charging and discharging state is continued.

13. as each described power-supply system control device in claim 1 to 8 or 10, it is characterized in that,

Also has the miscellaneous equipment control device, this control device is utilized the output of described the 2nd generating equipment and the deviation signal of the export target value of the stable state that is fit to described the 2nd generating equipment performance electric power change inhibition effect, the output of other generating equipment is changed, the output of described 2 generating equipments is maintained the export target value, thereby make described the 2nd generating equipment always suppress controllable state for the electric power change.

14. the electric power system control device described in claim 9 or 11 is characterized in that,

Also has the miscellaneous equipment control device, this control device is utilized the output of described the 2nd generating equipment and the deviation signal of the export target value of the stable state that is fit to described the 2nd generating equipment performance electric power change inhibition effect, the output of other generating equipment is changed, the output of described 2 generating equipments is maintained the export target value, thereby make described the 2nd generating equipment always suppress controllable state for the electric power change.

15. electric power system control method, be used to control and possess the 1st generating equipment that the generated output change is set and the 2nd generating equipment that when carrying out the basis generating, also has the duplex feeding synchronous generator of the changeable frequency field power supply that comprises prime mover and described prime mover driven, and the power-supply system that connects electric power system, it is characterized in that, comprise

The described the 1st of described power-supply device is input to described the 2nd generating equipment with at least one side that total generated output value of the 2nd generating equipment is connected with expression in the signal of electric current of linkage lines of described electric power system as control signal, and

According to the change of the described control signal of importing, utilize excitation control and prime mover control that the output of described the 2nd generating equipment is changed, thereby make total generated output value of the described the 1st and the 2nd generating equipment keep setting.

16. electric power system control method, the 2nd generating equipment of the duplex feeding synchronous generator that be used for the 1st generating equipment that control setting possesses generated output change, when carrying out the basis generating, also has the changeable frequency field power supply that comprises prime mover and described prime mover driven and the power-supply system that is not connected electric power system that possesses the load equipment that consumes electric power, it is characterized in that, comprise

The frequency of described power-supply system is input to described the 2nd generating equipment as control signal, and

According to the variation of the described control signal of importing, utilize excitation control and prime mover control that the output of described the 2nd generating equipment is changed, thereby suppress the frequency variation of described power-supply system.

17. electric power system control method, be used to control the generating equipment of configuration generated output change and contain prime mover and the electric power system of the duplex feeding synchronous motor generating equipment of the capacity equilibrium of the changeable frequency field power supply of described prime mover driven and capacity and described generating equipment, it is characterized in that

With the generated output of described generating equipment as input, utilize excitation control and prime mover control that the output of described duplex feeding synchronous motor generating equipment is changed, change influence thereby reduce described generating equipment, also make the effective power summation of described generating equipment and described duplex feeding synchronous motor generating equipment keep setting simultaneously to described electric power system.

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