EP2300263A1

EP2300263A1 - Power adjustment system adapted for powering an electric line for supplying power to vehicles

Info

Publication number: EP2300263A1
Application number: EP08874695A
Authority: EP
Inventors: Xavier Bavard; Eric Chattot; Jean-Noël VERHILLE
Original assignee: Siemens SAS
Current assignee: Siemens SAS
Priority date: 2008-06-20
Filing date: 2008-06-20
Publication date: 2011-03-30
Also published as: US20110095604A1; CA2728644A1; BRPI0822910A2; KR20110038046A; WO2009153416A1; CN102123883B; CN102123883A; US8729728B2; TW201008806A

Abstract

The invention relates to a power adjustment system adapted for powering an electric line for supplying power to vehicles moving in a traffic lane combined with said electric line that comprises an electric supply feeder (AD) delivering an average electric power directly or via at least one converter to the electric line, and an adjustable power based on power fluctuation and required for an instantaneous traffic intensity to an energy storage means (MS) capable of powering the electric line at a peak power via at least one other converter, characterised in that a dimensioning unit (PCC) receives information on the power needs based on the traffic intensity evaluated over at least one duration of said traffic, and in that the dimensioning unit uses information for controlling an adjustment of the useful predictable storage of the storage means so that the electric power (P_IN0, P_IN1) delivered to the storage means is adjusted and minimal while exactly maintaining a sufficient energy backup in the storage means for compensating for any peak power (P_INST) instantaneously required by the traffic in the given duration.

Description

Energy regulation system adapted to power a power line for distributing energy to vehicles

The present invention relates to an energy regulation system suitable for supplying an electric power distribution line to vehicles according to the preamble of claim 1.

In terms of vehicles, particular reference is made to public transport such as in the context of a railway line, a metro, bus or trolleybus line or any other group of vehicles traveling on a given route on which at least an energy supply point is arranged to provide a necessary energy supply to the vehicles.

In known manner and by way of example, such traction power supply systems of a metro line undergo energy fluctuations which mainly depend on the number of vehicles in line and their synchronism. The energy consumption, which increases with the number and the frequency of vehicles, is not constant and varies strongly according to the synchronism of the phases of traction (acceleration, constant speed, braking) of the vehicles. These rapid variations in energy are at the origin of important peaks of power that must be quenched. These power peaks require over-dimensioning of power distribution systems, and in many cases result in contractual penalties with the energy supplier.

These aspects are in particular to be considered in an energy regulation system adapted to the power supply of an electric power distribution line for moving on a traffic lane associated with said power line, thus comprising an electrical distribution trunk delivering electrical power to a clean energy storage means for supplying the power line according to energy fluctuations required for a traffic intensity (instantaneous) . The storage means is generally connected to catenaries or at least one power rail. In general, the distribution route of a power supplier consists of a chosen power supply in such a way that peak power requirements are perfectly assured in all the densest cases of traffic.

In the context of the present invention, between the distribution artery and the storage means is disposed a rectifying station comprising among others transformer / rectifier / circuit breaker / cable units in order to adequately distribute the power supplied into a useful power, so-called also "called" for each lane fed by said storage means.

The sizing of such an installation / line of energy distribution of a line (of subway for example), is calculated for the maximum capacity (number of vehicles) that authorizes the operation of a metro line in all operating modes (peak hours and off-peak hours). The sizing of the installations then takes into account the power peaks in order to guarantee the availability and the reliability of the system. With regard to the contractual commitment with the energy supplier two cases exist: 1) a subscription at the supplier is voluntarily oversized (therefore more expensive) to ensure sufficient energy input in all situations; 2) a subscription to the supplier is chosen dimensioned to the fair, but in case of exceeding power (for various reasons, high frequency of traffic, work, maintenance, equipment evolution, etc.) penalties are essential. At worst, provisions such as speed reduction or traffic density must be taken in order to limit the power consumption required on the track so as not to overload the power supply equipment. This obviously does not satisfy the passengers and especially the operator.

These contractual imperatives, in the face of performance obligations related to the current technique constitute a difficult dilemma to solve.

An object of the present invention is to propose an energy regulation system suitable for supplying an electric power distribution line for vehicles moving on a traffic lane associated with said power line, for which the sizing of the distribution artery must be better adapted to the needs of the line.

From an energy regulation system adapted to the power supply of an electric power distribution line for vehicles traveling on a traffic lane associated with said power line, comprising an electric delivery trunk delivering power electrical means directly to the power line or through at least one converter and a power controllable according to fluctuations (instantaneous) energy required for an instantaneous traffic intensity to a means of energy storage specific to supplying the power line with peak power through at least one other converter, the system also provides that:

a sizing unit (traffic control station) receives information on energy requirements according to the traffic intensity evaluated over at least one duration (for example time) of said traffic, - by means of the information, the unit sizing controls a predictable storage regulation useful the medium storage so that the electrical power delivered to the storage means (related to the power dimensioned by the supplier) is regulated to a minimum threshold while ensuring as accurately as possible a sufficient reserve of energy in the storage means to compensate for any peak power required instantly by the traffic ^' in the given duration.

In other words, the large energy deviations due to the peaks over a chosen period of time are directly damped by the storage means as a reserve with regulated and minimized supply input (supplier side) and with variable power output (user side ) "Accusing" the so-called large fluctuations. Thus, exceeding energy consumption and oversizing of the power supply of the supplier are advantageously avoided.

The invention provides that the storage means is inertial or electrical by means of at least one battery or at least one super-capacitor. In particular, a super-capacitor has the advantage of its strong capacitive property allowing a high load over a limited period of time as continuous and that it can likewise be discharged on the line for a limited time, for example during high instantaneous needs. in energy.

The storage means may be disposed on the ground as a reservoir of energy in a station, itself arranged along the track. This is appreciable when a vehicle has an on-board energy storage means requiring a main charging phase station (especially in case of catenary discontinuity or off-station power rail). In this respect, the storage means can thus also be distributed in a plurality of substations arranged along the path. A distribution artery can also be associated with each substation according to the invention. This considerably reduces a large dimensioning of the centralized distribution artery providing several substations.

For the purposes of storage regulation, the storage means comprises a storage control unit coupled to a transmitter / receiver module in communication (wired or aerial) with the energy regulation unit adapted to supply a line electrical distribution.

At the same time, the information received by the control unit includes the intensity of the traffic on the track in terms of the time interval between the vehicles, the number of vehicles and the energy requirement related to the displacement of the vehicles such as for vehicles. active equipment of comfort or safety. This information is in principle known by the traffic controllers and can therefore easily be implemented to flexibly define the regulation of the storage means over a period of time and thus the actual and exact power requirement provided by the delivery / distribution route ( supplier side).

In this sense, a set of subclaims also has advantages of the invention.

An exemplary embodiment and application is presented using the figures described:

Figure 1 diagram of an energy regulation system according to the invention adapted to the power supply of an electric power distribution line for vehicles, Figure 2 diagram of said system with station storage means.

FIG. 1 presents an energy regulation system according to the invention suitable for supplying a power distribution line COND (such as catenaries or a conducting rail) under an instantaneous power P_INST (or so-called peak) for vehicles V traveling on a traffic lane associated with said power line.

The system includes:

an electrical distribution artery AD delivering electrical power P_IN0 to a rectifier CONV. Said rectifier distributes an electrical power P_IN1 to an energy storage means MS and an electrical power P_MOY (= P_INO-P_IN1) to the electrical line COND which powers can be supplied simultaneously as a function of energy fluctuations required for an intensity of instant traffic,

the power P_IN0 thus made available falls within a "supplier" power range [PO; Pmax] which according to the invention must be regulated to a minimum threshold per step of constant voltage as a function of time interval int to be respected between the vehicles,

- the electrical power P_IN1 delivered by the supplier to the storage means is limited in such a way that said power corresponds to the maximum average power P_M0Y to be delivered for a given traffic and that the peak power P_INST associated with this same traffic is provided by the storage means MS,

the storage means MS is recharged with a power P_IN1 when the power demand falls below the power threshold P_M0Y corresponding to a decrease in the energy demand by the vehicles,

a PCC sizing unit receiving INF1 information on energy requirements of the traffic intensity evaluated over at least one duration of said traffic,

by means of information INF1, the sizing unit controls, by means of associated information INF2, a CTRL control of the useful predictable storage of the storage means MS so that the electrical power P_IN0 delivered to the storage means is regulated. at a minimum threshold while providing exactly a sufficient reserve of energy in the storage means to compensate for any peak power P_INST (and if necessary, its strong fluctuations) required by the traffic in the given duration. In particular, the electrical power P_IN0 of the supplier and P_IN1 delivered to the storage means is calculated as a function of F (int) of the time interval int between the vehicles on the track.

FIG. 1 also shows a converter (rectifying, for example) CONV power between an output of the distribution artery AD (supplier side) and an input of the storage means MS, allowing the conversion between the regulated and minimum input powers. P_INO and P_IN1 output of the CONV converter. This same rectification module CONV allows a direct link between the distribution artery AD and the electrical line COND (conventional diagram without storage means). Other rectifying devices such as between the storage means MS and the power line are not shown in FIG. 1 for the sake of clarity.

FIG. 2 represents a diagram of said system according to FIG. 1 with a super-capacitor 3 disposed in a station or substation (track quay) having a level 7. The storage means is supplied with energy under controlled and minimal power and thus discharges to the power line, here a catenary 13 or a conductive rail 14 in contact with the power supplies of the vehicles 1, 2, in order to deliver the exact level of peak powers that vehicles need. Depending on the size of the time interval 6, INT between the vehicles 1, 2, it is possible to exactly vary the power required to the storage means MS, while remaining under an acceptable "supplier" power over a predefined period of time (not oversized).

The storage means therefore comprises a super-capacitor 3 whose energy is steadily stored under regulated and minimum power in steps of constant power as a function of the interval INT by means of a rectifying circuit (converter 4 / chopper ) and can be re-delivered simultaneously to the power line 13, 14 at an instantaneous peak power required by the vehicles 1, 2. Principally, the converter 4 is a means of regulating the charge of the supercapacitor 3 as a function of the time interval INT between the vehicles 1, 2. In practice, the longer the time interval, the more the power required to charge the super-capacitor 3 can be reduced, thereby reducing more generally any power peak. The regulation of the instantaneous peak power is carried out by means of a current circuit 12 and a rectifier 15 additional to the energy supplied at the output of the supercapacitor 3, thus the power provided by the distribution artery is minimal and constant. .

The storage means comprises a control unit 10 for storing and discharging energy coupled to a transmitter / receiver type module 11 in communication with the sizing unit PCC (centralized control station). Thus, the power supplied to the storage means will periodically be adapted to a constant and low level while ensuring that variations in instantaneous discharge power will be compensated.

In order to facilitate the communication between the centralized control station 5, PCC and the control unit 10 for storing and discharging energy successively supplied under the "provider" power, stored in the storage means, and then restored to the power line the centralized control station PCC comprises, in addition to a sizing unit 8 for the control of the control unit 10 in the station, a transmitter / receiver communicating with the transmitter / receiver type module 11 of the storage means MS. In this way, it is possible to modify centrally at each station energy control parameters over a desired time (off-peak hours / full traffic) according to one invention.

Claims

claims

1. Energy regulation system adapted to the power supply of an electric power distribution line for vehicles moving on a traffic lane associated with said power line, comprising an electric distribution trunk (AD) delivering electrical power average directly to the power line or through at least one converter and a power controllable according to energy fluctuations required for an instantaneous traffic intensity to an energy storage means (MS) adapted to feed the line peak power through at least one other converter, characterized in that,

a sizing unit (PCC) receives information on energy requirements as a function of the traffic intensity evaluated over at least one duration of said traffic, - by means of the information, the sizing unit controls a regulation of the storage predictably useful storage means such that the electrical power (P_IN0, P_IN1) delivered to the storage means is regulated to a minimum threshold while providing exactly a sufficient reserve of energy in the storage means to compensate for peak power (P_INST) required instantly by the traffic in the given duration.

2. System according to claim 1, wherein the storage means is either inertial or electrical by means of at least one battery or at least one supercapacitor.

3. System according to claim 1 or 2, wherein the storage means is disposed in a station, itself arranged along the track.

4. System according to claim 1 or 2, wherein the storage means is distributed in a plurality of substations arranged along the path.

5. System according to one of the preceding claims, wherein the storage means comprises a control unit (10) for storing and discharging energy coupled to a transmitter / receiver type module (11) in communication with the sizing unit. .

6. System according to one of the preceding claims, wherein the information received by the sizing unit comprises the intensity of the traffic on the track in terms of time interval between vehicles, number of vehicles and energy requirement annexes to the moving vehicles such as for active comfort or safety equipment.