

Ancillary services in energy markets refer to support functions that maintain the reliability, stability, and quality of electricity transmission and distribution systems. These services include frequency regulation, voltage control, spinning reserves, black start capabilities, and reactive power management. In Türkiye, the provision of ancillary services is governed by the Electricity Market Ancillary Services Regulation (Yan Hizmetler Yönetmeliği), issued by the Energy Market Regulatory Authority (EPDK) and implemented through agreements between market participants and the Turkish Electricity Transmission Corporation (TEİAŞ). These agreements ensure that power system reliability is preserved, particularly during emergency events, peak loads, or system failures. Because these agreements carry strategic national importance, their structure, execution, and possible termination are subject to both contractual obligations and administrative regulations. The legal significance of these agreements lies in their hybrid nature: they often combine public service duties with private law elements, leading to complex compensation issues when prematurely terminated.
Ancillary services agreements in Türkiye are typically structured as standardized bilateral contracts between TEİAŞ and qualified service providers, such as power plants, independent system operators, or distribution companies. These agreements define the scope of services, operational parameters, remuneration models, performance benchmarks, and enforcement mechanisms. Moreover, they contain detailed technical appendices outlining service delivery requirements and response times. The agreements are entered into following a competitive procurement process or direct assignment, depending on the type of service. Provisions regarding default, non-performance, and early termination are central components of these contracts. TEİAŞ, as a state-owned enterprise, includes specific regulatory and administrative oversight clauses that provide the legal basis for unilateral termination under certain conditions, such as grid restructuring, policy changes, or emergency needs. This hybrid contractual form, sitting between public procurement and private obligation, makes the determination of compensation rights following termination particularly nuanced.
Termination of ancillary services agreements may occur for various reasons, and understanding the legal implications of each is essential for assessing compensation rights. The most common grounds for termination include: breach of contract, failure to meet performance standards, repeated technical failures, force majeure events, and unilateral termination by TEİAŞ due to system requirements or regulatory reforms. Occasionally, termination may be triggered by financial distress or bankruptcy of the service provider. Importantly, some terminations are contractually anticipated and permitted without penalty, while others may constitute wrongful breach if not supported by valid justification or if conducted without proper notice. In recent years, the energy transition and the rapid integration of renewable energy sources have led TEİAŞ to restructure grid services, occasionally resulting in termination of long-standing ancillary service contracts. When such terminations cause financial harm to service providers—especially in the form of lost investments or stranded assets—they may seek legal remedies under Turkish commercial and administrative law.
The legal framework governing the termination of ancillary services agreements and related compensation claims in Türkiye draws from multiple sources: the Turkish Code of Obligations (Law No. 6098), the Turkish Commercial Code (Law No. 6102), the Electricity Market Law (Law No. 6446), and public procurement principles where applicable. If the ancillary service contract is primarily governed by private law, compensation for early or unjust termination is typically based on breach of contract provisions under Articles 112–125 of the Turkish Code of Obligations. Compensation may include actual loss, lost profits, and restitution of investments. If the contract bears a public law character—especially in cases involving discretionary decisions by TEİAŞ or EPDK—affected parties may file administrative compensation claims under Law No. 2577 on Administrative Procedure. In both cases, the claimant must demonstrate that the termination was either unlawful or unjustified and that it caused measurable financial damage. Arbitration clauses, force majeure provisions, and administrative appeal rights also play crucial roles in such claims.
One of the key legal challenges in compensation claims arising from termination of ancillary services agreements is determining whether the liability is contractual (civil) or administrative (public). This distinction affects jurisdiction, procedures, burden of proof, and applicable remedies. For example, if a service provider claims that TEİAŞ wrongfully terminated a contract based on system reconfiguration without adhering to contractual notice provisions, the case may fall under civil courts. However, if the termination results from a regulatory policy decision or government directive, then the claim may need to be brought before an administrative court. The Constitutional principle of “state liability for wrongful administrative acts” under Article 125 supports such claims. It is also possible for hybrid claims to arise—where a contractual termination is linked to a public regulation. In such cases, Turkish courts may bifurcate jurisdiction or allow claimants to proceed under both legal regimes. Legal practitioners must carefully analyze the content, formation, and enforcement mechanisms of each agreement to determine the correct legal path for redress.
To claim compensation, service providers must establish the extent of their financial losses due to contract termination. This typically includes unrecovered investments, lost revenues, decommissioning costs, and in some cases, reputational damages. Turkish law recognizes both actual loss (maddi zarar) and loss of expected profit (yoksun kalınan kar) under Article 122 of the Turkish Code of Obligations. In ancillary services disputes, demonstrating these elements often requires expert technical and financial reports, market value analyses, and internal documentation. Compensation amounts may also be influenced by amortization schedules, depreciation periods, and opportunity costs. For example, a power plant that invested in specialized equipment for frequency control services—based on a 10-year agreement—may suffer a significant loss if the agreement is terminated in the fourth year. Courts and arbitral tribunals generally require evidence of investment reliance, foreseeability of loss, and causal connection between termination and financial harm. In administrative cases, proof of disproportionate or arbitrary action by TEİAŞ is also necessary.
Most ancillary services agreements in Türkiye include dispute resolution clauses specifying either Turkish commercial courts or arbitration venues such as the Istanbul Arbitration Centre (ISTAC). Arbitration is increasingly favored due to its confidentiality, technical neutrality, and procedural flexibility. In international cases or cross-border investments, parties may opt for arbitration before the International Chamber of Commerce (ICC) or the London Court of International Arbitration (LCIA). These venues allow energy actors to present detailed technical evidence, cross-examine expert witnesses, and pursue remedies consistent with international energy law norms. For agreements involving public entities, some disputes must be resolved through the administrative court system, in accordance with Law No. 2577. In such cases, pre-litigation procedures, appeal timelines, and procedural compliance become critical. Claimants must prepare extensively, as disputes often involve simultaneous regulatory, technical, and legal layers. Early involvement of legal counsel and technical consultants significantly improves the prospects of favorable adjudication or settlement.
The termination of ancillary services agreements can have broader implications beyond the direct financial impact on service providers. At the system level, it may create gaps in service coverage, especially in reactive power support, black-start capabilities, or peak load reserves. If not managed properly, such gaps can threaten grid reliability and operational security. From an investor perspective, arbitrary or poorly justified terminations can undermine market confidence, especially in capital-intensive infrastructure sectors like energy. The perception of regulatory risk increases when long-term service agreements are ended without compensation or alternative commercial arrangements. This may discourage future investment in flexible generation, smart grid technologies, or grid modernization projects. For Türkiye’s energy market to remain attractive to domestic and international investors, ancillary service agreements must be governed by transparent rules, predictable enforcement, and credible compensation mechanisms in case of early termination. Legal clarity and institutional accountability are essential for maintaining long-term energy system stability.
Globally, ancillary services contracts are recognized as critical components of grid operations, and many jurisdictions have adopted robust legal safeguards to manage terminations and ensure fair compensation. In the United States, FERC regulations allow service providers to recover stranded costs through structured compensation programs. In the UK, the National Grid enters into ancillary service agreements with embedded compensation clauses for early termination, often based on predefined metrics or independent arbitration. The EU’s Clean Energy Package promotes flexibility and transparency in system service procurement, encouraging non-discriminatory access and fair termination protocols. These international models emphasize clear regulatory frameworks, investment protection, and dispute resolution autonomy. Turkish legal professionals can draw valuable insights from these models, especially when drafting or challenging ancillary services agreements. Comparative legal research can also support arbitration claims and inform regulatory reforms in Türkiye’s evolving energy landscape.
To minimize the legal and financial risks associated with the termination of ancillary services agreements, energy service providers should adopt several strategic measures. First, contracts must include detailed termination clauses with notice requirements, compensation formulas, and alternative dispute resolution pathways. Second, technical and financial investments should be structured to match the risk profile of the agreement—avoiding front-loaded expenditures without safeguards. Third, service providers should maintain ongoing communication with TEİAŞ and EPDK, documenting operational compliance, performance metrics, and risk assessments. Fourth, legal counsel should periodically review contract alignment with regulatory developments, ensuring that any policy shifts are addressed in advance. Finally, parties should consider insurance instruments or performance bonds to mitigate exposure. These practices not only reduce the likelihood of disputes but also strengthen the legal and commercial standing of providers in arbitration or court proceedings.
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