CN1086854C

CN1086854C - Customer side power management sytsem and method

Info

Publication number: CN1086854C
Application number: CN96180287A
Authority: CN
Inventors: 威廉G·威利姆
Original assignee: Nextek Power Systems Inc
Current assignee: Nextek Power Systems Inc
Priority date: 1991-01-08
Filing date: 1996-03-18
Publication date: 2002-06-26
Anticipated expiration: 2016-03-18
Also published as: CN1217095A

Abstract

The present invention relates to a power management system at a user side, which comprises a power transmitter (10) coupled to power lines (L1, L2, L3 and N) come from a power company. The power transmitter (10) detects random peak power demand quantity come from the power company to generate an output signal in direct proportion to the demand. The output signal is averaged by (14) on time and is supplied to a comparison circuit (21), a predetermined threshold signal (28 or 32) is also supplied to the comparison circuit (21), and the two signals are compared. An AC-DC converter (38) or a power supply is coupled to the power lines (L1, L2, L3 and N), DC voltage is generated at the output end of the AC-DC converter (38) or the power supply, and the amplitude of the DC voltage is controlled by an output signal come from the comparison circuit (21). The present invention also comprises a power supply isolating and distributing circuit (48) and a storage battery (34), wherein the power supply isolating and distributing circuit is connected between the AC-DC converter (38) and the storage battery (34). The power management system detects the peak power demand, and converts the power supply of the AC-DC converter (38) to a specific load (46) of a user to the power supply of the storage battery (34). When no peak power demand exists, the AC-DC converter (38) supplies power to the specific load (46).

Description

Customer side power management sytsem and method

The present invention generally relate to a kind of user side to Utilities Electric Co. power can the system and method that manages of consumption, relate in particular to a kind of user of minimizing to system and method from the peak value electric power expense of Utilities Electric Co..More particularly, the present invention relates to detect the user of Utilities Electric Co. at random or other peak value electric power expenses and control be positioned at a kind of equipment and the method for the electric power accessory power supply operation of user side.In addition, the present invention relates to a kind of by buying and store electric power and use stored electric power to come the equipment and the method for load transfer at user side in the high expense stage in the non-peak value electric power expense stage.

The user of a large amount of electric power consumes electric power with uneven speed usually.This point is particularly useful for having the user of normal interruption load, promptly has the user of many equipment that frequently stop and starting.So as can be known user produces at random the peak value with accumulative total in its electric power expense.Such example is arranged, and is the typical supermarket with about four or how different refrigerating systems, and each refrigerating system has independently control device, and these systems produce each component of synthetic peak load.

A typical diurnal load diagram of many industrial manufacturing equipments, retailing facility or the like is made of the load of several chance mechanisms, shown in Figure 1A-1D.Figure 1A represents four hours permanent lighting loads of ten or twenty.Figure 1B represents partly to be interrupted at random load.Fig. 1 C represents partly longer cycle load at random, and Fig. 1 D represents a synthetic idealized diurnal load diagram, and the uncertain peak value of height that occurs at random all day is shown.

Although there is the electric power expense of this variation, still require Utilities Electric Co. all will make preset time generate output exceed maximum expectation electric energy expense arbitrarily in the section.Therefore, Utilities Electric Co. must make generate output much larger than the average power expense, so that satisfy these at random and the expense of short-term.It is quite expensive to produce and keep this excess capacity, and has increased the average cost that electric energy is provided significantly.

For the cost allocation that the excess generate output will be provided needs most the user of these capacity to those, also, generally Utilities Electric Co.'s tax rate schedule of these users is divided into two parts at least in order to encourage these users to disperse its expense to electric power.First is an electric energy cost of use, its reflection Utilities Electric Co.'s self generating and the expense of carrying electricity.Generally calculate this expense with the required cent of every power consumption 1 kilowatt hour in a specific record keeping stage.Second portion is a peak value expense expense, and it reflects the capital cost of Utilities Electric Co., based on consuming the poor of average power with the user during a predetermined expense time interval.Peak value expense expense is counted every kilowatt of cent or dollar that the true peak expense is required.The percentage that these peak value expense expenses account for whole Utilities Electric Co.s expense in the whole specific record keeping stage is quite high.

Because Utilities Electric Co. has increased the expense of using bigger peak value expense, many commercial power family has begun one's study and has reduced method to the peak value electric power expense of Utilities Electric Co..A kind of method is to reduce the peak value expense.The way that reduces the peak value expense is that the use order of adjustment equipment is so that only allow the load equipment of some to work simultaneously.This method is controlled very expensive and has been limited the user.

Another kind method is to improve the efficient of user's station service power load.Though this method is a kind of method of active, it reduce to produce effects aspect the peak value expense less.And the user is paid this just peak value expense of the scale effect maximum of its power consumption expense.

The third method is to use the peak value generator.The peak value generator is the generator that uses during peak value expense in day part that provides of Utilities Electric Co..These generators can be placed on extremely user scene near Utilities Electric Co..The problem relevant with peak value power plant (generator) invested height before comprising completion, the duty cycle is low, environmental problem is serious and the time is longer.

One object of the present invention is to provide a kind of system and method at the user side managing power.

Another object of the present invention is to provide a kind of equipment, thereby it shifts the peak value electric power expense that obtains from Utilities Electric Co. usually by a specific constant and main relatively user load such as the fluorescent lighting of controllably will leading from the electric energy of a storage battery, in order to reduce the on-peak electric energy expense of user to Utilities Electric Co..

It is this by controllably thereby electric energy being shifted usually on-peak electric energy expense from Utilities Electric Co. to reduce the user be especially important to the on-peak electric energy expense of Utilities Electric Co. from a lead certain loads such as fluorescent lighting of a storage battery, express aspect the fast urgent expense of control particular user load and the main deviation between prior art, the particular user load can be powered by direct current power, and this direct current power and AC electric power or the AC electric power that is converted to DC are that isolate and different.

A present invention also purpose is to provide a kind of equipment that is used in the electric power management system, this equipment is used for converting the AC electricity to a DC direct current based on efficient switch mode power topological structure, and this topological structure can be with the part of a storage battery as its internal circuit.

A further object of the present invention is to provide a kind of equipment, and the amplitude of the detected peak value electric power of this device responds electric power management system expense is distributed the electric energy from accumulator plant pari passu, and this accumulator plant is used in the electric power management system.

Another purpose of the present invention is to provide a customer side power management sytsem and method, and with respect to other schemes, this system and method can be automatically and improved the user uses electric energy in as illumination and other electronic loads in the basic load district efficient significantly.

For achieving the above object, provide a kind of electric power management system according to a first aspect of the invention, comprised following combination:

The AC electrical connection arrangement comprises the AC input lead of reception from the AC electric energy of a Utilities Electric Co.; With AC electrical load device, be connected to and be used in electric power management system the AC distributing electric power is given on the input lead of a plurality of coupled electrical loads; And at least one DC load device, link to each other with electric power management system,

Described electric power management system comprises at least two DC power-supply devices, comprises AC-DC first supply unit that is exclusively used in the DC load device, and it is connected to the AC input lead, is used for changing the AC electric energy to constitute first DC power source apparatus; With at least one continuous-current plant, it also is exclusively used in described DC load device and is made up of a DC source, and the DC source and first DC power source apparatus are isolated mutually, and each can both provide to described DC load device and drive all required electric weight of this device, and

With the circuit arrangement of first DC power source apparatus, continuous-current plant and the interconnection of DC load device, work in one of three kinds of patterns: 1) a kind of pattern is that first DC power source apparatus provides all electric weight to a DC load device; 2) a kind of pattern is that first DC power source apparatus and continuous-current plant are powered to a DC load device jointly; 3) a kind of pattern is that continuous-current plant provides all electric weight to a DC load device.

Preferably in electric power management system according to the present invention, described circuit arrangement has the form of steering diode array, comprises the device that changes the first DC power source apparatus output level with respect to the output level of continuous-current plant.

Preferably in electric power management system according to the present invention, a DC load device is a fluorescent lighting load, and continuous-current plant has the form of accumulator plant or photo-cell assembly.

Provide a kind of according to a second aspect of the invention the AC electric energy is supplied with the system of a plurality of power consumption subscriber equipmenies from Utilities Electric Co., described Utilities Electric Co. comprises a plurality of electric leads of the AC power delivery being given the power consumption subscriber equipment;

Each power consumption subscriber equipment has an electrical power distribution case that is connected on the electric lead, load wire picks out therefrom in order to be connected on the power consumption user electrical load, it is on the power consumption user electrical load of a specific loads as a lighting load that some electrical load leads are connected to one, some electrical load leads of subscriber equipment are connected to the AC-DC main electricity that produces DC power, there as the independent power supply of a direct current source apparatus form

With the checkout gear that the electrical wire of Utilities Electric Co. is coupled, be used for detecting in real time by all power consumption subscriber equipmenies and be applied to excessive AC electric energy in the Utilities Electric Co. together,

And the device of powering in response to checkout gear so that to the specific loads of each power consumption subscriber equipment, supply power mode is: 1) separately by the DC power supply power supply of relevant power consumption subscriber equipment main power source; 2) power by the mode of load sharing together by the main power source of relevant power consumption subscriber equipment DC power supply and the DC source of relevant power consumption subscriber equipment; Or 3) power by the DC source of relevant power consumption subscriber equipment separately.

AC electric energy supplied with the system of a plurality of power consumption subscriber equipmenies according to of the present invention from Utilities Electric Co. above-mentioned, preferably, checkout gear produces the variable output signal of all power consumption subscriber equipmenies of expression to the electric power expense of Utilities Electric Co.'s generation, and each device in response to checkout gear comprises the comparison means that receives a reference signal and receive variable output signal from checkout gear.

In said system according to the present invention, preferably, each device in response to checkout gear also comprises diode apparatus, and this diode apparatus is connected to the relevant current consuming apparatus main power source of a DC power source apparatus, be connected to relevant user's specific loads, be connected to relevant comparison means.

A kind of electric power management system is provided according to a third aspect of the invention we, has comprised following combination:

The AC electrical connection arrangement receives the AC electric energy from a Utilities Electric Co.; AC electrical load device is connected to and is used in electric power management system distributing on the AC power supplies of AC electric power; With at least one DC load device, in electric power management system, also can power separately by DC source with the AC isolation of Utilities Electric Co.;

Electric power management system comprises two supply units to a DC load device power supply, the DC electric power after the conversion is supplied with AC-DC first supply unit of DC load device; With at least one second source device of forming by the DC source device;

Checkout gear, AC-DC first supply unit, second source device and DC load device are linked together, be used for detecting the electric power expense of this management system to Utilities Electric Co., and be used to provide variable output signal in response to the output level state of electric power expense and second source device, so that:

When the variable output signal level in response to the electric power expense when being high, AC-DC first supply unit provides all electric power to the DC load device;

When the output level of second source device when being high, DC second source device provides all electric power to the DC load device; And

When the mutual fluctuation between the output level that has the variable output signal level occur because of the electric power expense and second source device, jointly electric power is supplied with to AC-DC first supply unit and the variation of second source device the DC load device.

Preferably in above-mentioned electric power management system, described DC load is a fluorescent lighting load, and checkout gear comprises that one is coupled to the power transducer of AC power line and the differential amplifying device of generation variable output signal.

The present invention also provides a kind of electric power management system, comprising:

Reception is from the AC electrical connection arrangement of the AC of a Utilities Electric Co. electric energy; Be connected to the AC electrical load device on the AC power supplies of in electric power management system, distributing AC electric power; With at least one the DC load device in the electric power management system, the AC of it and Utilities Electric Co. isolates,

Described electric power management system comprises two DC power source apparatus that are exclusively used in the DC load device; One AC-DC circuit, conversion has special use first DC power source apparatus of positive and negative lead-in wire from the AC electric power of Utilities Electric Co. in order to provide one; With the special-purpose second source device of at least one DC, form by a DC source with positive and negative lead,

Checkout gear detects the electric power expense of this management system to Utilities Electric Co., in order to producing a variable output signal that is directly proportional with the electric power expense,

Control device links together positive and negative lead-in wire and lead, special-purpose second source device and the DC load device of special-purpose first supply unit, in order to responding relative voltage level and the variable output signal between positive and negative lead-in wire and lead, so that:

When variable output signal level when being high, the special-purpose second source device of DC provides all electric power to the DC load device;

When the voltage level between the positive and negative lead of DC source when being high, special-purpose first supply unit of DC provides all electric power to the DC load device; With

When the variable output signal level that is directly proportional with the electric power expense and the voltage level between positive and negative lead-in wire and lead had fluctuation mutually, first supply unit and second source device changed ground jointly to described DC load device power supply.

Preferably in above-mentioned electric power management system, described checkout gear comprises a differential amplifying device and an isolated from power and distributor circuit.

Preferably in above-mentioned electric power management system, described isolated from power and distributor circuit comprise diode array.

Preferably in above-mentioned electric power management system, also comprise the set point control device that is used for changing variable output signal.Preferably, set point control device wherein is also according to the relative value of the electric power expense of Utilities Electric Co. being controlled variable output signal.

The method of a kind of and a plurality of current consuming apparatus co-operate one common AC power company is provided according to a further aspect in the invention, has comprised step:

A) provide AC electric power according to the electric power expense of each current consuming apparatus to them from Utilities Electric Co., the AC electric power expense of each equipment of real time monitoring is to produce each device specific AC electric power expense signal, these AC electric power expense signals real-time AC electric power expense of expression that add up wherein to Utilities Electric Co.

B) the AC power conversions of step a) is become DC electric power in each equipment, in order to from AC electric power and depend on that AC electric power provides a main DC power supply for each equipment.

C) for each equipment provides an auxiliary DC power supply, auxiliary DC power supply and AC power supplies are isolated, and can be a storage battery or DC source,

D) according to the supervision controlled step b of step a)) and DC source c), two of each equipment DC power works are in one of three kinds of patterns like this: under first pattern, Utilities Electric Co. provides real-time AC electric power expense to be in all electric power that a plurality of equipment consumed within the peak value electric power expense limit and the main DC power supply in the step b) is consumed under charged state all electric power basically; Under second pattern, the part A C electric power that Utilities Electric Co. provides each equipment to consume, the part A C power conversions of Utilities Electric Co. provides some DC electric power in the step b) for auxiliary DC electric power with each equipment in real-time AC electric power expense still is in peak value electric power expense limit; Under three-mode, Utilities Electric Co. provides AC electric power and each main DC power supply provides the auxiliary DC electric power of maximum in its equipment, and AC electric power expense is lower than peak value electric power expense limit.

Preferably in said method, step d) comprises that setting up a plurality of set points changes pattern to change ground.

Preferably in said method, the main DC power supply in the step b) is exclusively used in a DC load as a fluorescent lighting load, and this DC load can be by the power supply of DC power supply, and main DC power supply and auxiliary DC power supply are in parallel with the DC load.

Preferably in said method, main DC power supply and auxiliary DC power supply are to stride the load-commutated diode of DC.

In accordance with a further aspect of the present invention, provide a kind of method of customer side power management sytsem, wherein managed the peak value electric power expense that a current consuming apparatus produces Utilities Electric Co., and produced AC electric power, may further comprise the steps in this Utilities Electric Co. at user side:

I) produce AC electric power and it be transferred to current consuming apparatus in a Utilities Electric Co. by electrical wire,

The load device that at least one AC partly is interrupted at random ii) is set in described current consuming apparatus,

Iii) some electrical wires with current consuming apparatus are connected to step I i in the current consuming apparatus) at least one AC partly be interrupted at random on the load device,

Iv) in current consuming apparatus with step I) at least some AC power conversions of producing become direct current to produce a DC power supply and a variable level output signal after changing, the output level of this variable level output signal is in response to step I) in the AC electric power that produces of the Utilities Electric Co. peak value electric power expense of making

One inner DC power supply v) is set in current consuming apparatus, and it produces direct current, this direct current and step I) in the AC electric power that produces with-or separate and different from the direct current that step I v) changes,

At least one inner DC load apparatus vi) is set in current consuming apparatus, its consumed current or the step I conversion direct current in v), or the inside DC power supply of step in v) send direct current, or consume sum of the two, and

Vii) according to the variable level signal of step I in v), vi) reduce the peak value electric power expense of subscriber equipment by controllably electric energy v) being guided to step from step, thereby will transfer to step inside DC power supply v) the peak value electric power expense of Utilities Electric Co. to Utilities Electric Co..

Preferably in said method, may further comprise the steps: a) with step inside DC power supply and the inner DC load apparatus diode-isolated of vi) at least one of step v); And b), make one to be better than another according to the variable level output signal level.

Preferably in said method, comprise step c): the inner DC load apparatus of vi) at least one of step is all or part of can not situation by direct current supply under, with step I i) in the transformation DC power supply transform back into AC electric power.

Preferably in said method, when a Utilities Electric Co. produced AC electric power, according to the accumulation peak electric power expense that one or more current consuming apparatus produce Utilities Electric Co., at subscriber equipment square tube reason electric power, this method was further comprising the steps of:

A) produce AC electric power and it be transferred to a plurality of current consuming apparatus in a Utilities Electric Co. by electrical wire,

B) in each current consuming apparatus inside at least one AC is set and partly is interrupted load device at random,

C) at least one AC that some electrical wires of each current consuming apparatus are connected in each current consuming apparatus partly is interrupted load device at random,

D) with step I) at least a portion changes the direct current in each current consuming apparatus in the AC electric power that produces, in order to the DC source after providing to change and the relevant current consuming apparatus of an expression variable level signal to the accumulation peak electric power expense of Utilities Electric Co.'s generation,

E) an inner DC power supply is set, it links to each other with each current consuming apparatus, and generation and steps A) in the AC electric power that produces and from step D) change and the direct current that comes separates and different direct currents,

F) at least one inner DC load apparatus is set, the direct current that its consumes or from step) one change direct current, or from step e) the direct current of inside DC power supply, or sum of the two, and

G) according to step D) signal, by making direct current power consumption at step D) and step e) between shift to manage the accumulation peak electric power expense that one or more current consuming apparatus produce Utilities Electric Co. in the subscriber equipment square tube.

According to a kind of form of the present invention, a customer side power management sytsem comprises a power transducer, and it has one or more transducers, is connected to the power line of the subscriber equipment that enters Utilities Electric Co..This power transducer detects the power that subscriber equipment obtains, and produces the signal that is directly proportional with obtaining power.

This system also can comprise an integrator, and it is connected to the output of power transducer.This integrator is averaged in a predetermined integral stage to the signal from transmitter according to measuring the essentially identical mode of peak value power consumption with Utilities Electric Co..The output signal of integrator is supplied with an input of a comparison circuit (or a differential amplifier circuit, in fact it play a comparator), and this comparison circuit is also included within this system.

Another input of comparison circuit is connected to an automatic and adjustable set point circuit or a manual adjustable set point circuit, and one of these two circuit can be coupled on this comparison circuit by a suitable switching circuit.Set point circuit provides a threshold signal for comparison circuit.

Comparison circuit is to comparing from the signal of integrator and the threshold signal of set point circuit, if the output signal of integrator is more than or equal to this threshold signal, then comparison circuit produces a kind of output signal of amplitude at least; If the output signal of integrator is less than this threshold signal, then comparison circuit produces the output signal of another kind of amplitude at least.

Electric power management system of the present invention also comprises an AC-DC converter, and it is preferably a switching type power supply.This power supply has a control input end, offers this control input end from the output signal that compares (or difference amplification) circuit.This Switching Power Supply receives at least a portion and supplies with the AC electric power of subscriber equipment by Utilities Electric Co., and is DC electric power at its output with this part power conversions.

Supply with an isolation and distributor circuit and an energy storage device as a storage battery from the DC electric power of switching type power supply.According to the power consumption that the power consumption and the system power transmitters sense of equipment arrives, this isolation and distributor circuit control are from DC power supply or storage battery or take from the two electric power pari passu, and these electric power are supplied with a load.

According to the detailed description of reading below in conjunction with accompanying drawing to illustrative embodiment of the present invention, these and other purposes of the present invention, feature and advantage can be clearly.

Figure 1A is the curve chart between time of electric power expense and the permanent lighting load of an imaginary subscriber equipment.

Figure 1B is that an electric power expense and an imaginary subscriber equipment partly are interrupted the curve chart between time of load at random.

Fig. 1 C is the partly curve chart between the time of longer cycle load at random of electric power expense and an imaginary subscriber equipment.

Fig. 1 D is the curve chart between time of an electric power expense and an imaginary subscriber equipment, represents the synthetic idealized diurnal load diagram of such equipment.

Fig. 2 is the schematic diagram of one customer side power management sytsem of formation according to the present invention, represents that it and subscriber equipment have the interface between the power line now.

Fig. 3 is the schematic diagram of another electric power management system of formation according to the present invention.

Fig. 4 is an electric power expense and the curve chart of time, and it is similar with Fig. 1 D in many aspects, and expression is by adopting the result of System and method for restriction load of the present invention.

Fig. 5 one is similar to the electric power expense of Fig. 4 and the curve chart of time in many aspects, represents the diurnal load diagram of this equipment that electric power management system of the present invention is worked in an imaginary subscriber equipment.

Referring to the Fig. 2 in the accompanying drawing, as can be known, the customer side power management sytsem that constitutes according to the present invention can be convenient to the existing power line interconnection with subscriber equipment, in order to the load expense of monitoring user.For ease of understanding the present invention, Fig. 2 shows from Utilities Electric Co. and the three-phase power line that received by subscriber equipment (that is, being marked with the L1, the L2 that represent each phase and the line of L3) and a center line (being N).This three-phase power line L1, L2 and L3 and center line N are received by the main distributing board 2 of a subscriber equipment.Main distributing board 2 distributes electric energy in entire equipment, it supplies with an illuminated diagram switch board 4 with electric energy under many situations, and this illuminated diagram switch board 4 is as its name referring, gives each lighting circuit in this equipment with power distribution.Promptly, main distributing board 2 lays the three-phase power line of Utilities Electric Co. usually in whole subscriber equipment, so just give each used load of subscriber equipment with distributing electric power, shown in Figure 1A-1C, three kinds of very common AC electrical loads are arranged, they need be used in the AC electric energy that produces in public or the power equipment and power, and pick out from illustrated subscriber equipment, and they are: a lighting load (seeing Figure 1A), partly be interrupted load (seeing Figure 1B) and partly longer cycle load at random (seeing Fig. 1 C) at random.Like this, three-phase power line L1, L2 and L3 and center line N insert from the Utilities Electric Co. side of main distributing board 2, and from the AC power line of main distributing board 2 output as this distribution board user side, thereby with need link to each other with the combination load that the electric power that Utilities Electric Co. sends is powered, shown in Figure 1A-1C.

Usually, main distributing board 2 comprises that by one or more the power line 6 of a center line 8 interconnects with illuminated diagram switch board 4, but for purposes of the invention, as shown in phantom in Figure 2, the interconnection line between main distributing board and the illuminated diagram switch board disconnects.Should be understood that differently, only can't separately under the situation of power supply, just need the gap introducing inverter 1 of the interconnection line between main distributing board 2 and illuminated diagram switch board 4 by direct current in lighting load with the situation of powering in whole or in part to lighting load by the AC electricity.May can't carry under the situation of any AC electricity in Utilities Electric Co. at all, must provide whole AC electricity with inverter 1, this to a certain extent cannot.

According to the present invention, electric power management system comprises a power transducer 10.This power transducer 10 links to each other with one or more voltages or current sensor 12, and each sensors coupled is to each phase power line.Power transducer 10 is measured the electric energy from Utilities Electric Co. that subscriber equipment consumed in real time, and produces an output signal corresponding with this measured value.The output signal that power transducer 10 is produced is directly proportional with subscriber equipment institute power consumption power on amplitude.For example, output signal can represent that its scope is from 0～+ 10 or-10 volt, corresponding to 0～100 kilowatt power consumption with voltage.The appropriate power transmitter 10 that can be used for electric power management system of the present invention is Rochester InstrumentSystems, Inc.The Part No. of producing is the product of PCE-20.

Preferably supply with an integrating circuit 14 from the output signal of power transducer 10.The realtime power measured value that 14 pairs of power transducers of this integrating circuit produce asks average.Integrating circuit 14 simulation Utilities Electric Co.s are used for the work of a similar integrating circuit of average its user's peak value electric power expense.

Integrating circuit 14 can constitute with the whole bag of tricks, as shown in Figure 2, comprises and adopts the operational amplifier 16 that has a feedback capacity 18 and an input resistance 20.Select the value of electric capacity 18 and resistance 20 to expect the time of integration to produce one.Integrating circuit 14 shown in Figure 2 produces a negative gain; Therefore, if adopt such circuit, then it can be coupled to 0 of power transducer～-the 10V output is to produce a positive output voltage signal, this signal is along with obtaining from Utilities Electric Co. and being changed by transducer 12 detected variable power.

Electric power management system of the present invention also comprises a comparison circuit, and the preferred form of this comparison circuit is a differential amplifier circuit 21.The first input end of differential amplifier circuit 21 is supplied with in the output of integrating circuit 14.Second input of differential amplifier circuit 21 is connected to a switching circuit 22, and this switching circuit 22 functionally is expressed as a single-pole double-throw switch (SPDT) 22a in Fig. 2.

More particularly, " cutter " arm 24 of switching circuit is connected to second input of differential amplifier circuit 21.The one end utmost point 26 of switching circuit 22 is connected to an automatic and adjustable set point circuit 28, and the other end utmost point 30 of switching circuit 22 is connected to a manual adjustable set point circuit 32.

The threshold signal of one voltage form is provided to second input of differential amplifier circuit 21 by switching circuit 22 with manual adjustable set point circuit 28,32 automatically.As will mentioning, this threshold signal is represented a power stage, and at this power stage place, the DC accessory power supply that constitutes an electric power management system part is used for one or more various electric in subscriber equipment as a storage battery 34.

Various manual adjustable set point circuit can be used for the present invention.An example is a potentiometer 36, it be connected between the generating positive and negative voltage or voltage V1 and ground between, its cursor slide is connected to the end utmost point 30 of switching circuit 22.Sort circuit provides a threshold voltage to differential amplifier circuit 21.After curve that the user is consumed energy was analyzed, set point circuit 32 can obtain adjusting.As shown in Figure 2, set this threshold voltage so that any accidental or recurrent (that is nonrandom time of every day) peak value of user's day electric power expense is provided by the auxiliary DC power supply of this electric power management system whole or in part.

Automatic and adjustable set point circuit 28 will be termly for example obtain and store the maximum of true peak electric power expense during every day or every month at the fixed time at interval, and produces the threshold signal of " moving average " that calculates based on this circuit.This threshold signal is supplied with the input of differential amplifier circuit 21 by switching circuit 22.Automatic setting dot circuit 28 will be adjusted this threshold signal automatically according to the moving average with user's peak value electric power expense of certain algorithm computation.A kind of like this example of circuit is disclosed in No. the 4th, 731,547, the US patent of authorizing people such as Phillip Alenduff, and its disclosed content is hereby incorporated by.

As its name referring, relatively (or be more preferably difference amplify) circuit 21 threshold signal that one of set point circuit 28,32 is provided with make comparisons from the output signal of integrating circuit 14, wherein select in the set point circuit 28,32 one by switching circuit 22, average take from the power of Utilities Electric Co. to output signal representative during predetermined integration period.If from the output signal of integrating circuit 14 on amplitude greater than threshold signal, promptly, expression is consuming excessive or on-peak electric energy, then as will mentioning, differential amplifier circuit 21 will detect this phenomenon and produce a ratio output signal, and this ratio output signal is compatible mutually with the signal that is used for controlling the AC-DC converter that constitutes an electric power management system part or switching mode type of power 38.

A kind of form that is applicable to differential amplifier circuit 21 of the present invention is the operational amplifier 40 with a feedback resistance 42 and an input resistance 44, threshold signal offers the inverting input of operational amplifier 40 by input resistance 44, and offering an end of second input resistance 43 from the output signal of integrating circuit 14, the other end of second input resistance 43 is connected to the in-phase input end of operational amplifier and through another resistance 45 ground connection.If the value of first input resistance 44 and feedback resistance 42 equates with the value of second input resistance 43 and earth resistance 45 respectively, will be the voltage level that the difference between the voltage level with the output signal of integrating circuit and threshold signal equates with the product of the ratio of the resistance of the feedback resistance 42 and first input resistance 44 then from the output signal of differential amplifier circuit 21.Therefore, from the output signal of differential amplifier circuit 21 preferably with output signal and the outer in proportion voltage level that changes of the difference between the set point threshold signal level from integrating circuit 14.

As will be in greater detail, many AC-DC power supply ratios are adjusted its output-voltage levels in the voltage that arrives its signal input end, and work under the positive control signal voltage, for example for 125 volts～110 volts output, adjusted value is 0 volt～10 volts.For the negative voltage drift appears in the output signal that prevents differential amplifier circuit 21, for example, when the output signal level of integrating circuit is lower than set point threshold signal level, can provides a positive voltage to the corresponding power end of operational amplifier 40, and make negative power end ground connection.Other method is, when the output signal of integrating circuit 14 during less than set point threshold signal level, can insert a diode (not shown), the plus earth of this diode and its negative pole connects the output of operational amplifier 40, thus the output signal of differential amplifier is clamped to 0V.

If the differential amplifier circuit 21 of a continuous variable output signal need not be provided, the difference between the output signal of this output signal and threshold signal and integrating circuit is directly proportional, and then can adopt the simple comparator as an operational amplifier form.The output signal of integrator and threshold signal are supplied with two inputs of comparator, and the output signal of comparator is supplied with the control input end of AC-DC converter 38.When the output signal of integrating circuit during greater than threshold signal, the output signal of comparator will be in first state to signal to AC-DC converter 38, make it produce first output-voltage levels.When the output signal of integrating circuit is less than or equal to threshold signal, the output signal of comparator will be in second state to signal to AC-DC converter 38, make it produce second output-voltage levels.

As previously mentioned, electric power management system of the present invention comprises an AC-DC translation circuit 38.Translation circuit 38 is preferably a switching type power supply, as everyone knows its good stability and efficient height.The AC input that at this moment power line 6 of the main distributing board 2 of initial supply illuminated diagram switch board 4 and center line 8 supply with Switching Power Supply 38.The output signal of comparator or differential amplifier circuit 21 is supplied with the control input end of this power supply.Switching Power Supply 38 is transformed to a dc voltage and electric current to the AC electricity of supplying with it, thus a specific loads or a plurality of load of starting subscriber equipment, for example fluorescent lighting load 46 as shown in Figure 2.Can be used for electric power management system proper A C-DC Switching Power Supply 38 of the present invention is the Techni Power Corp. that are positioned at Connecticut, the product of the Part No. 2678644 that a Penril Company is produced.For bigger electrical management expense, several power supplys that can be connected in parallel, all these power supplys are by comparator or differential amplifier circuit 21 controls.No matter use that a kind of AC-DC converter 38, comparator or differential amplifier circuit 21 all are used to provide appropriate control signals so that change the output of converter with the need.

The output voltage of switch DC power supply 38 can be directly proportional with the control signal that it receives and adjust.For example, this power supply can select or be designed so that 0～10 volt of supply power control input end control voltage reversal adjusts 125～110 volts of the DC output voltages of power supply.As will be described in more detail, control to AC-DC power supply 38 output voltages is importance of this electric power management system, can be subjected to driven by power from Utilities Electric Co. or auxiliary DC power supply such as storage battery 34 because of it can make illumination or other loads, auxiliary DC power supply places the subscriber equipment end.

Supplying with an isolated from power and distributor circuit 48 from the DC output voltage of AC-DC power supply 38, and to supply be the 2nd DC power supply of a storage battery 34 in preferred form of the present invention.More particularly, the input that just is connected to isolated from power and distributor circuit 48 of power supply 38, isolated from power is connected on the power line 6 that is connected with illuminated diagram switch board 4 with an output of distributor circuit, and another output of isolated from power and distributor circuit is connected to the positive terminal of storage battery 34.The negative output terminal of power supply 38 is connected to the cathode output end of storage battery 34, and is connected on the center line 8 that links to each other with illuminated diagram switch board 4.Connect by this way, AC-DC battery 38 just not only provides DC illumination from electricity to user or other loads 46, but also when low electric power expense to charge in batteries.

In the present invention's one preferred form, isolated from power and distributor circuit 48 are made up of one group three

interconnection diodes

50,52 and 54 substantially.The positive pole of the 3rd diode 54 is connected to the positive output end of power supply 38, and its negative pole is connected to the positive terminal of storage battery 34.The positive pole of second diode 52 is connected to the positive terminal of storage battery 34, and its negative pole is connected to first output of isolated from power and distributor circuit 48, and this output links to each other with power line 6 on receiving illuminated diagram switch board 4.The positive pole of first diode 50 is connected to the positive output end of power supply 38, and its negative pole is connected to the negative pole of second diode 52 and first output of isolated from power and distributor circuit 48.

The diode of isolated from power and distributor circuit forms isolation between storage battery 34 and AC-DC power supply 38, and bigger " insensitive interval " or isolated area are set so that storage battery can place in circuit, thereby power to illumination or other load 46, or isolate with this circuit.Diode 50 to the 54 preferred high power silicon diodes that are used for isolated from power and distributor circuit.

Isolated from power and distributor circuit 48, power supply 38 and storage battery 34 work in following mode.Suppose that for example storage battery 34 is 124 volts of DC, the AC-DC power supply is output as 125 volts of DC, so just make the first and the

3rd diode

50,54 forward bias, suppose that diode drop is 0.7 volt and then makes first and second output end voltage of distributing electric power circuit be 124.3 volts.Second diode 52 instead ends basically partially.At this moment DC power supply 38 is also powered so that to its charging to storage battery 34 simultaneously to illumination or other loads 46 power supplies.This situation betides during the no peak value electric power expense.

If for example the output of AC-DC power supply drops to 123 volts, so just make the first and the

3rd diode

50,54 of isolated from power and distributor circuit partially anti-, and second diode, 52 positively biaseds.In this case, storage battery 34 is to illumination or other electric.This situation betides during the peak value electric power expense.The electric weight of storage battery 34 supply loads is substantially equal to the electric weight that the user obtains from Utilities Electric Co., and this electric weight exceeds the set point threshold quantity, is lower than the load upper limit amount.

For example, suppose that user's expense is 750 kilowatts, the set point threshold quantity is set in 800 kilowatts, and the lighting load of electric power management system control of the present invention is 100 kilowatts.Because user's expense is lower than peak value set point threshold quantity, so user's lighting load can be passed through the power supply of AC-DC converter by Utilities Electric Co. fully, and in these cases can be to battery recharge.This can think first mode of operation of electric power management system.

Suppose that now user's expense increases to 850 kilowatts, promptly exceed 50 kilowatts of 800 kilowatts of set point threshold quantities setting in the management system.In this case, the lighting load of this system's control will be obtained 50 kilowatts of electric weight from Utilities Electric Co. by AC-DC converter 38, and obtain 50 kilowatts of electric weight from storage battery.Like this, Utilities Electric Co. and storage battery are carried on a shoulder pole electric weight pari passu altogether, thereby to illumination or other electric.This can think second mode of operation of this system.

If user's expense increases to 1000 kilowatts, promptly exceed 200 kilowatts of threshold quantities, then lighting load will fully by storage battery power supply, powers and can't help Utilities Electric Co..This can think the 3rd " uninterruptedly " mode of operation of this system.

Storage battery 34 preferably is made of ten 12 volts of DC storage batterys that are connected in series.A kind of storage battery that is suitable for using be GNB.Inc a kind of sealing of producing, exempt from the plumbic acid AbsolyteTM series battery who protects.

The work of electric power management system of the present invention is now described.Shown in Fig. 1 D, a peak value electric power expense accidental or that often occur is detected by power transducer 10.The output signal voltage level of power transducer increases, the recruitment in a predetermined integral stage by integrating circuit 14 average these voltage levels.Therefore the output signal of integrating circuit also increases amplitude.If the output signal level of integrating circuit 14 is greater than the threshold signal level of the set point circuit 28 that is connected to this system or 32, then comparator or differential amplifier circuit 21 can detect this point, provide a suitable output signal to reduce electric power output voltage to AC-DC power supply 38, make it be lower than the electromotive force of storage battery 34.Because the storage battery electromotive force is greater than supply voltage, so supply with from storage battery 34 to load.

If the electric power expense to Utilities Electric Co. reduces the then corresponding output signal amplitude that reduces power transducer 10 and integrating circuit 14.If the output signal of integrating circuit is fallen or is lower than set point circuit 28,32 preset threshold level, then comparator or differential amplifier circuit 21 detect this point, provide a proper signal to increase the output-voltage levels of power supply to the control input end of Switching Power Supply 38.If the output-voltage levels of power supply is greater than the current of storage battery 34 or " on-the-spot (spot) " electromotive force, then load is once more fully by the power supply power supply, and electric current flows through storage battery, till storage battery charges fully.Under this pattern, no current flows to load from storage battery.

The electric power management system of the another kind of form of the present invention schematically shows in Fig. 3.Power transducer 10 is connected to one or more custom power line as shown in Figure 2, and its output is connected to the in-phase input end of the operational amplifier 60 that constitutes a homophase buffer amplifier.The output of buffer amplifier 60 is connected to a side of a differential amplifier circuit, this differential amplifier circuit comprises an operational amplifier 40, first input resistance 43 and another resistance 45, first input resistance 43 is connected between the in-phase input end of the output of buffer amplifier and operational amplifier 40, and another resistance 45 is connected between the in-phase input end and ground of this operational amplifier 40.Feedback resistance 42 between the output that differential amplifier comprises another input resistance 44 of being connected to operational amplifier 40 inverting inputs, be connected on this operational amplifier and the inverting input and a feedback capacity 62 in parallel with this feedback resistance.Feedback resistance 42 is preferably equivalence with earth resistance 45 in previous embodiment, and

input resistance

43,44 is preferably equivalence.Feedback capacity 62 is arranged to make the response time of differential amplifier to slow down.

One manual set point threshold circuit comprises a potentiometer 36, and two relative pins of potentiometer 36 are connected between a positive voltage and the ground, and its cursor slide is connected to the in-phase input end of the operational amplifier 64 that constitutes a homophase buffer amplifier.The output of buffer amplifier 64 is connected to another input resistance 44 of differential amplifier.

The output of differential amplifier is connected on the voltage to current converter, and this voltage to current converter comprises the resistance 68 between the base stage of a NPN transistor 66, the output that is connected on differential amplifier and transistor 66 and is connected emitter resistance 70 and series diode 72 between transistor emitter-base bandgap grading and the ground jointly.The collector electrode of transistor 66 is connected on the end and cursor slide of end of a fixed resistance 74 and multiturn potentiometer 76, the other end ground connection of multiturn potentiometer 76.It is the input of adjusting of the series controller 78 of TL783C that the other end of fixed resistance 74 is connected to the Part No. of producing as Texas Instruments, also be connected to an end of another fixed resistance 80, the other end of this another fixed resistance 80 is connected to output (OUT) end of adjuster 78.

Such among the embodiment as the aforementioned, this electric power management system comprises: one contains the AC-DC converter of above-mentioned adjuster 78; The full-wave rectifying circuit of forming by two

diodes

82,84; And traditional π type filter circuit of forming by two

shunt capacitances

90,92 and series connection choke or an inductance coil 94, this filter circuit is connected to the output of rectification circuit.The output of filter circuit is connected on the pin of fixed resistance 96, and another pin of fixed resistance 96 is connected to the input (IN) of adjuster 78 and is connected on the base stage of PNP transistor 98 by a base resistance 100.The emitter of transistor 98 is connected to the output of filter circuit, and collector electrode is connected to the base stage of npn power transistor 102.Adoptable appropriate power transistor 102 is that the Part No. that Texas Instruments produces is the TIPL762 transistor.Certainly, select power transistor according to the power requirement of this system.The collector electrode of power transistor 102 is connected to the emitter of transistor 98 of its driving and the output of filter circuit, and the emitter of power transistor 102 is connected to the output of adjuster 78.

Transistor

98 and 102 and related elements constitute a current boost circuit.

Electric power management system shown in Figure 3 comprises that also one isolates and distributor circuit, as above-mentioned embodiment illustrated in fig. 2 in like that, first, second forms with the

3rd diode

50,52 and 54 this circuit by three interconnection.The output of adjuster 78 is connected to the positive pole of the first and the 3rd diode 50,54.The negative pole of the positive pole of second diode 52 and the 3rd diode 54 is connected to storage battery 34 positive terminals that are used for this electric power management system, and the negative pole of the second and the

3rd diode

52,54 is connected in the load 46 of being powered by native system.

Electric power management system shown in Figure 3 works in following mode.When the electric weight that obtains from Utilities Electric Co. made the output level of power transducer 10 be lower than the set point threshold level, the transistor 66 of voltage to current converter ended.This has increased the following pin resistance value of resistance pressure-dividing network effectively, and this resistance pressure-dividing network is limited by the combination and being connected in parallel of multiturn potentiometer 76 of the resistance 80 that comprises pin, a plurality of resistance 74; Also increased the resistance value of voltage to current converter, this converter comprises the following pin of network.In this case, the cathode voltage of first diode 50 will be greater than the cathode voltage of second diode 52, and the cathode voltage of second diode 52 is the voltage of storage battery 34.First diode, 50 conductings and second diode 52 is partially anti-, thus make electricity from Utilities Electric Co. by AC-DC converter, i.e. full-wave rectifying circuit, filter and current boost circuit supply load 46.

When the electricity of the Utilities Electric Co. that power transducer 10 user that detects of electric power management system obtains increases, the output signal of buffer amplifier 60 will exceed the output signal amplitude of threshold signal buffer amplifier 64.In view of the above, differential amplifier produces a positive voltage output signal, and this signal makes transistor 66 conductings of voltage to current converter that electric current is flow through.The following pin resistance value that this has reduced resistance pressure-dividing network has effectively correspondingly reduced the cathode voltage of first diode 50 again.If the cathode voltage of first diode 50 is reduced to the positively biased working point of second diode 52, then electric current flows to load from storage battery 34.If obtain a small amount of electric weight from Utilities Electric Co., then the output voltage of power transducer 10 reduces, and this output voltage influences the electric current that the output voltage of differential amplifier and the collector electrode by voltage to current converter transistor 66 obtain.This just becomes the cathode voltage of first diode 50 one and shares in proportion from storage battery with from the working point of Utilities Electric Co.'s electric weight.Like this, this electric power management system serves as one the servo system of feeding back and self-adjusting ability being arranged.

From the above description as can be known, electric power management system of the present invention is easy to be used in seldom or does not have in the subscriber equipment of reclosing line.Because main distributing board 2 is connected to second illuminated diagram switch board 4 usually,, insert electric power management system so can disconnect interconnection line between the two.And the fluorescent lighting that accounts for some Utilities Electric Co.'s user's total load nearly 40% is an attractive especially load of working with electric power management system.This lighting load kept complete steady state in one day, therefore can be easy to optimize in order to move the electric power management system parameter of such load.In addition, the at present many and electric ballast that is used for fluorescent lighting that day by day increase works under the direct current (DC) or (AC) state of interchange.If the fluorescent lighting of electronic ballast or magnetic ballast is powered by electric power management system control and by AC, this can be by finishing with an inverter 110, this inverter 110 is connected between the output (and negative terminal of AC-DC converter 38) and illuminated diagram switch board 4 of isolated from power and distributor circuit 48, as shown in phantom in Figure 2.Therefore, fluorescent lamp and other illumination utmost points are suitable for working with electric power management system of the present invention.

Electric power management system of the present invention is used for removing at random from the custom power line or the frequent peak load that occurs, as shown in Figure 4, main economic interests to the user are to avoid the expense expense, and Fig. 4 dots and eliminates user's these peak values to Utilities Electric Co.'s expense.And electric power management system can make load transfer, and this is best to Utilities Electric Co..As shown in Figure 5, threshold quantity can be regulated by system and be set to remove and to shift these expense loads.

Typical user's load curve represented by solid line among Fig. 5, have in the curve peak value occur in afternoon 1:00 or its about.Between this peak period, electric power management system starts automatically to reduce the electric power of power consumption power company of institute.During this period of time, shown in alphabetical D among Fig. 5, storage battery 34 mainly the discharge, in order to the illumination or other electric.Like this user load curve is reduced to curve shown in dotted lines in Figure 5.

During low electric power expense, as mentioned above, electric power management system is to storage battery 34 chargings.The charge in batteries stage is represented by letter C among Fig. 5.This load transfer also can carry out at the fixed time.As shown in Figure 2, but being connected between cut-off switch circuit 22 and the differential amplifier circuit 21 is shown in dotted line, adds a relay or switching circuit 112 between the two.Relay or switching circuit 112 functionally are expressed as a single-pole double-throw switch (SPDT) 112a, and its tool arm 114 is connected on the differential amplifier circuit 21, and an one end utmost point 116 is connected on the tool arm 24 of switching circuit 22.The other end utmost point 118 can be connected on the voltage source V, and the amplitude of this voltage source V is lower than the output signal amplitude of integrating circuit 14, or is lower than the output signal amplitude that will carry out the power transducer 10 expected during the load transfer.

Timing circuit 120 is coupled on relay or the switching circuit 112 to control this circuit, so that by being connected between relay or switching circuit 112 cut-off switch circuit 22 and the differential amplifier circuit 21, voltage V is added on the differential amplifier circuit 21 by relay or switching circuit 112 in the given time.Owing to voltage V is chosen to be the output voltage that is lower than integrating circuit 14 and power transducer 10, is lower than the electromotive force of storage battery 34 so the output signal of differential amplifier circuit 21 guarantees the output voltage of AC-DC translation circuit 38.Therefore, storage battery " is opened " in the time period in the programming of timer 120 controls and is provided predetermined power to selected load.

One external control input 122 also can be connected on the relay 112 so that an external control signal can be in the time will carrying out load transfer switch relay.This control input end can be connected to a modulator-demodulator 124, but this is not necessary, modulator-demodulator 124 is positioned at user side, so that for example when when a signal being sent to modulator-demodulator 124 and carry out the user side load transfer with control relay 112, Utilities Electric Co. is remote control voluntarily.

Because Utilities Electric Co. collects the extra charge of peak value power consumption, can significantly reduce the electricity expense that the user bears and use so from Utilities Electric Co., remove accidental or recurrent peak load.

Because storage battery only just uses at the accidental stage of development of peak value electric power expense, so can make the discharge controlling depth of storage battery and the cycle that discharges and recharges very little.Prolonged the life-span of storage battery thus.

Be to be noted that the secondary power supply of available other types, as a power generator or photo-cell assembly.These devices can be in order to replace storage battery 34 or can suitably insert electric power management system to replace or the compensation storage battery.

Though describe illustrated embodiment of the present invention with reference to the accompanying drawings at this, but be appreciated that the present invention is not limited to those clear and definite embodiment, do not depart from the scope of the present invention or the situation of essence under, those of ordinary skill in the art can carry out various other betwixt and change and revise.

Claims

1. electric power management system, comprise power transducer, voltage that links to each other with power transducer or current sensor, the integrating circuit of the output signal of received power transmitter, receive the comparison circuit of the output of integrating circuit, the switching circuit that links to each other with comparison circuit, the automatic setting dot circuit and the manual adjustable set point circuit of threshold signal are provided to comparison circuit via switching circuit, inverter between main distributing board and assistance switchboard, receive the main distributing board of the electric power of Utilities Electric Co.'s transmission, the load of the user side output of the illuminated diagram switch board of the electric energy that the reception main distributing board is supplied with and reception main distributing board is characterized in that also comprising following combination:

2. electric power management system as claimed in claim 1 is characterized in that described circuit arrangement has the form of steering diode array, comprises the device that changes the first DC power source apparatus output level with respect to the output level of continuous-current plant.

3. electric power management system as claimed in claim 1 is characterized in that a DC load device is a fluorescent lighting load, and continuous-current plant has the form of accumulator plant or photo-cell assembly.

4. one kind the AC electric energy supplied with the system of a plurality of power consumption subscriber equipmenies from Utilities Electric Co., described Utilities Electric Co. comprises a plurality of electric leads of the AC power delivery being given the power consumption subscriber equipment;

It is characterized in that described system also comprises in response to checkout gear so that the device that the specific loads of each power consumption subscriber equipment is powered, supply power mode is: 1) separately by the DC power supply power supply of relevant power consumption subscriber equipment main power source; 2) power by the mode of load sharing together by the main power source of relevant power consumption subscriber equipment DC power supply and the DC source of relevant power consumption subscriber equipment; Or 3) power by the DC source of relevant power consumption subscriber equipment separately.

5. system as claimed in claim 4, it is characterized in that checkout gear produces the variable output signal of all power consumption subscriber equipmenies of expression to the electric power expense of Utilities Electric Co.'s generation, each device in response to checkout gear comprises the comparison means that receives a reference signal and receive variable output signal from checkout gear.

6. system as claimed in claim 5, it is characterized in that each device in response to checkout gear also comprises diode apparatus, this diode apparatus is connected to the relevant current consuming apparatus main power source of a DC power source apparatus, is connected to relevant user's specific loads, is connected to relevant comparison means.

7. electric power management system, comprise power transducer, voltage that links to each other with power transducer or current sensor, the integrating circuit of the output signal of received power transmitter, receive the comparison circuit of the output of integrating circuit, the switching circuit that links to each other with comparison circuit, the automatic setting dot circuit and the manual adjustable set point circuit of threshold signal are provided to comparison circuit via switching circuit, inverter between main distributing board and assistance switchboard, receive the main distributing board of the electric power of Utilities Electric Co.'s transmission, the load of the user side output of the illuminated diagram switch board of the electric energy that the reception main distributing board is supplied with and reception main distributing board

It is characterized in that also comprising following combination:

8. electric power management system as claimed in claim 7 is characterized in that the DC load is a fluorescent lighting load, and checkout gear comprises that one is coupled to the power transducer of AC power line and the differential amplifying device of generation variable output signal.

9. electric power management system, comprise power transducer, voltage that links to each other with power transducer or current sensor, the integrating circuit of the output signal of received power transmitter, receive the comparison circuit of the output of integrating circuit, the switching circuit that links to each other with comparison circuit, the automatic setting dot circuit and the manual adjustable set point circuit of threshold signal are provided to comparison circuit via switching circuit, inverter between main distributing board and assistance switchboard, receive the main distributing board of the electric power of Utilities Electric Co.'s transmission, the load of the user side output of the illuminated diagram switch board of the electric energy that the reception main distributing board is supplied with and reception main distributing board

It is characterized in that also comprising:

10. electric power management system as claimed in claim 9 is characterized in that described checkout gear comprises a differential amplifying device and an isolated from power and distributor circuit.

11. electric power management system as claimed in claim 10 is characterized in that described isolated from power and distributor circuit comprise diode array.

12. electric power management system as claimed in claim 9 is characterised in that also to comprise the set point control device that is used for changing variable output signal.

13. electric power management system as claimed in claim 12 is characterized in that described set point control device is also according to the relative value of the electric power expense of Utilities Electric Co. being controlled variable output signal.

14. a user side electric power management method with a plurality of current consuming apparatus co-operate one common AC power company, comprises step:

15. method as claimed in claim 14 is characterized in that described step d) comprises that setting up a plurality of set points changes pattern to change ground.

16. method as claimed in claim 15 is characterized in that the main DC power supply in the described step b) is exclusively used in a DC load as a fluorescent lighting load, this DC load can be by the power supply of DC power supply, and main DC power supply and auxiliary DC power supply are in parallel with the DC load.

17. method as claimed in claim 16 is characterized in that main DC power supply and auxiliary DC power supply are to stride the load-commutated diode of DC.

18. one kind when managing the peak value electric power expense that a current consuming apparatus produces Utilities Electric Co. at user side, the method in that this Utilities Electric Co. produces AC electric power may further comprise the steps:

It is characterized in that further comprising the steps of:

19. method as claimed in claim 18 is characterised in that further comprising the steps of: a) with step inside DC power supply and the inner DC load apparatus of vi) at least one of step diode-isolated v); And b), make one to be better than another according to the variable level output signal level.

20. method as claimed in claim 19, be characterised in that also comprise step c) the inner DC load apparatus of vi) at least one of step is all or part of can not situation by direct current supply under, with step I i) in the transformation DC power supply transform back into AC electric power.

21. method as claimed in claim 18, it is characterized in that producing AC electric power in a Utilities Electric Co., simultaneously, according to the accumulation peak electric power expense of one or more current consuming apparatus to Utilities Electric Co.'s generation, at subscriber equipment square tube reason electric power, this method is further comprising the steps of: