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2007 German TransmissionCode

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    TransmissionCode 2007 Network and System Rules of the German Transmission System Operators August 2007    Authors: Holger Berndt E.ON Netz GmbH Mike Hermann VDN – Verband der Netzbetreiber e.V. Horst D. Kreye Vattenfall Europe Distribution Berlin GmbH and Vattenfall Europe Distribution Hamburg GmbH Rüdiger Reinisch Vattenfall Europe Transmission GmbH Ulrich Scherer EnBW Transportnetze AG Joachim Vanzetta RWE Transportnetz Strom GmbH Translation: Edith Kammer-Strnad/VDN © Verband der Netzbetreiber - VDN – e.V. beim VDEW Robert-Koch-Platz 4 D-10115 Berlin Tel: +49 (0) 30 / 726 148 - 0 Fax: +49 (0) 30 / 726 148 - 200 info@vdn-berlin.de, www.vdn-berlin.de August 2007 edition    TransmissionCode 2007 – Table of contents © Verband der Netzbetreiber   – VDN – e.V. beim VDEW, August 2007 page I Contents 1   INTRODUCTION 1  1.1 G ENERAL  1 2   IMPLEMENTATION OF THE TSOS’ RESPONSIBILITY FOR THE SYSTEM WITH THE COOPERATION OF DSOS 3  2.1 Introduction 3 2.2 Adjustments aiming at the maintenance of the system balance and network security 4 2.2.1 Adjustments aiming at the maintenance or restoration of the system balance 4 2.2.2 Adjustments aiming at the maintenance or restoration of the network security 6 2.2.3 Operational implementation of adjustments 7 2.2.4 Obligation to inform in the event of adjustments 8 2.2.5 Requirements on documentation for adjustments under Article 13, para. 2 EnWG 10 2.3 Identification of possible risks or disturbances in the transmission network 10 2.4 Rules concerning the technical implementation 12 3   CONNECTION CONDITIONS 13  3.1 Purpose of the connection conditions 13 3.2 Grid connection 13 3.3 Special requirements governing the connection of generating units 16 3.3.1 General 16 3.3.2 Configuration of the grid connection 16 3.3.3 Synchronizers 16 3.3.4 Electrical protection of the network and the generating unit 17 3.3.5 Power system control communication 18 3.3.6 Active power output 18 3.3.7 Frequency control 20 3.3.7.1 Primary control 20 3.3.7.2 Secondary control and minutes reserve 21 3.3.8 Reactive power supply 21 3.3.8.1 Reactive power supply at rated active power 21  TransmissionCode 2007 – Table of contents © Verband der Netzbetreiber   – VDN – e.V. beim VDEW, August 2007 page II 3.3.8.2 Reactive power supply from generating units operating at less than full output 24 3.3.9 Design of the generator transformers 24 3.3.10 Generator voltage control 24 3.3.11 Disconnection of the generating unit from the network 24 3.3.11.1 Frequency 25 3.3.11.2 Stability 25 3.3.11.3 Network voltage 25 3.3.12 Behaviour of the generating unit in the event of network disturbances 25 3.3.12.1 Transient stability (short-circuits) 25 3.3.12.2 Steady-state stability (network oscillations) 26 3.3.13 Requirements upon generating units using renewable energy sources 27 3.3.13.1 General 27 3.3.13.2 Determination of the nominal capacity 27 3.3.13.3 Active power output 27 3.3.13.4 Reactive power supply 28 3.3.13.5 Behaviour in the event of network disturbances 29 3.3.13.6 Exceptional rules for renewables-based generating facilities 33 3.3.13.7 Special requirements for the connection of offshore-generating plants 34 3.3.14 Restoration of supply 34 3.3.14.1 Tripping of generating units onto auxiliary supplies 34 3.3.14.2 Capability of isolated (network)operation 34 3.3.14.3 Black-start capability 35 3.3.14.4 Network restoration concept 35 3.3.14.5 Training 35 3.3.15 Monitoring fulfilment of the requirements 36 3.4 Special requirements for the connection of subordinated networks 36 3.5 Requirements for network protection 37 3.6 Information exchange at the interfaces 37 3.7 Measures to be taken in the event of modifications to the TSO’s and connection users' installations 38
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